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haproxy/src/mux_h1.c
Christopher Faulet 2fc9e6fa39 MEDIUM: mux-h1: Support C-L/T-E header suppressions when sending messages 
During the 2.9 dev cycle, to be able to support zero-copy data forwarding, a
change on the H1 mux was performed to ignore the headers modifications about
payload representation (Content-Length and Transfer-Encoding headers).

It appears there are some use-cases where it could be handy to change values
of these headers or just remove them. For instance, we can imagine to remove
these headers on a server response to force the old HTTP/1.0 close mode
behavior. So thaks to this patch, the rules are relaxed. It is now possible
to remove these headers. When this happens, the following rules are applied:

 * If "Content-Length" header is removed but a "Transfer-Encoding: chunked"
   header is found, no special processing is performed. The message remains
   chunked. However the close mode is not forced.

 * If "Transfer-Encoding" header is removed but a "Content-Length" header is
   found, no special processing is performed. The payload length must comply
   to the specified content length.

 * If one of them is removed and the other one is not found, a response is
   switch the close mode and a "Content-Length: 0" header is forced on a
   request.

With these rules, we fit the best to the user expectations.

This patch depends on the following commit:

  * MINOR: mux-h1: Add a flag to ignore the request payload

This patch should fix the issue #2536. It should be backported it to 2.9
with the commit above.
2024-05-17 16:33:53 +02:00

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/*
* HTTP/1 mux-demux for connections
*
* Copyright 2018 Christopher Faulet <cfaulet@haproxy.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <import/ebistree.h>
#include <import/ebmbtree.h>
#include <haproxy/api.h>
#include <haproxy/cfgparse.h>
#include <haproxy/connection.h>
#include <haproxy/dynbuf.h>
#include <haproxy/h1.h>
#include <haproxy/h1_htx.h>
#include <haproxy/h2.h>
#include <haproxy/http_htx.h>
#include <haproxy/htx.h>
#include <haproxy/istbuf.h>
#include <haproxy/log.h>
#include <haproxy/mux_h1-t.h>
#include <haproxy/pipe.h>
#include <haproxy/proxy.h>
#include <haproxy/session-t.h>
#include <haproxy/stats.h>
#include <haproxy/stconn.h>
#include <haproxy/stream.h>
#include <haproxy/trace.h>
#include <haproxy/xref.h>
/* H1 connection descriptor */
struct h1c {
struct connection *conn;
struct h1s *h1s; /* H1 stream descriptor */
struct task *task; /* timeout management task */
uint32_t flags; /* Connection flags: H1C_F_* */
enum h1_cs state; /* Connection state */
struct buffer ibuf; /* Input buffer to store data before parsing */
struct buffer obuf; /* Output buffer to store data after reformatting */
struct proxy *px;
unsigned int errcode; /* Status code when an error occurred at the H1 connection level */
int idle_exp; /* idle expiration date (http-keep-alive or http-request timeout) */
int timeout; /* client/server timeout duration */
int shut_timeout; /* client-fin/server-fin timeout duration */
unsigned int req_count; /* The number of requests handled by this H1 connection */
struct h1_counters *px_counters; /* h1 counters attached to proxy */
struct buffer_wait buf_wait; /* Wait list for buffer allocation */
struct wait_event wait_event; /* To be used if we're waiting for I/Os */
};
/* H1 stream descriptor */
struct h1s {
struct h1c *h1c;
struct sedesc *sd;
uint32_t flags; /* Connection flags: H1S_F_* */
struct wait_event *subs; /* Address of the wait_event the stream connector associated is waiting on */
struct session *sess; /* Associated session */
struct buffer rxbuf; /* receive buffer, always valid (buf_empty or real buffer) */
struct h1m req;
struct h1m res;
enum http_meth_t meth; /* HTTP request method */
uint16_t status; /* HTTP response status */
char ws_key[25]; /* websocket handshake key */
};
/* Map of headers used to convert outgoing headers */
struct h1_hdrs_map {
char *name;
struct eb_root map;
};
/* An entry in a headers map */
struct h1_hdr_entry {
struct ist name;
struct ebpt_node node;
};
/* Declare the headers map */
static struct h1_hdrs_map hdrs_map = { .name = NULL, .map = EB_ROOT };
static int accept_payload_with_any_method = 0;
/* trace source and events */
static void h1_trace(enum trace_level level, uint64_t mask,
const struct trace_source *src,
const struct ist where, const struct ist func,
const void *a1, const void *a2, const void *a3, const void *a4);
/* The event representation is split like this :
* h1c - internal H1 connection
* h1s - internal H1 stream
* strm - application layer
* rx - data receipt
* tx - data transmission
*
*/
static const struct trace_event h1_trace_events[] = {
#define H1_EV_H1C_NEW (1ULL << 0)
{ .mask = H1_EV_H1C_NEW, .name = "h1c_new", .desc = "new H1 connection" },
#define H1_EV_H1C_RECV (1ULL << 1)
{ .mask = H1_EV_H1C_RECV, .name = "h1c_recv", .desc = "Rx on H1 connection" },
#define H1_EV_H1C_SEND (1ULL << 2)
{ .mask = H1_EV_H1C_SEND, .name = "h1c_send", .desc = "Tx on H1 connection" },
#define H1_EV_H1C_BLK (1ULL << 3)
{ .mask = H1_EV_H1C_BLK, .name = "h1c_blk", .desc = "H1 connection blocked" },
#define H1_EV_H1C_WAKE (1ULL << 4)
{ .mask = H1_EV_H1C_WAKE, .name = "h1c_wake", .desc = "H1 connection woken up" },
#define H1_EV_H1C_END (1ULL << 5)
{ .mask = H1_EV_H1C_END, .name = "h1c_end", .desc = "H1 connection terminated" },
#define H1_EV_H1C_ERR (1ULL << 6)
{ .mask = H1_EV_H1C_ERR, .name = "h1c_err", .desc = "error on H1 connection" },
#define H1_EV_RX_DATA (1ULL << 7)
{ .mask = H1_EV_RX_DATA, .name = "rx_data", .desc = "receipt of any H1 data" },
#define H1_EV_RX_EOI (1ULL << 8)
{ .mask = H1_EV_RX_EOI, .name = "rx_eoi", .desc = "receipt of end of H1 input" },
#define H1_EV_RX_HDRS (1ULL << 9)
{ .mask = H1_EV_RX_HDRS, .name = "rx_headers", .desc = "receipt of H1 headers" },
#define H1_EV_RX_BODY (1ULL << 10)
{ .mask = H1_EV_RX_BODY, .name = "rx_body", .desc = "receipt of H1 body" },
#define H1_EV_RX_TLRS (1ULL << 11)
{ .mask = H1_EV_RX_TLRS, .name = "rx_trailerus", .desc = "receipt of H1 trailers" },
#define H1_EV_TX_DATA (1ULL << 12)
{ .mask = H1_EV_TX_DATA, .name = "tx_data", .desc = "transmission of any H1 data" },
#define H1_EV_TX_EOI (1ULL << 13)
{ .mask = H1_EV_TX_EOI, .name = "tx_eoi", .desc = "transmission of end of H1 input" },
#define H1_EV_TX_HDRS (1ULL << 14)
{ .mask = H1_EV_TX_HDRS, .name = "tx_headers", .desc = "transmission of all headers" },
#define H1_EV_TX_BODY (1ULL << 15)
{ .mask = H1_EV_TX_BODY, .name = "tx_body", .desc = "transmission of H1 body" },
#define H1_EV_TX_TLRS (1ULL << 16)
{ .mask = H1_EV_TX_TLRS, .name = "tx_trailerus", .desc = "transmission of H1 trailers" },
#define H1_EV_H1S_NEW (1ULL << 17)
{ .mask = H1_EV_H1S_NEW, .name = "h1s_new", .desc = "new H1 stream" },
#define H1_EV_H1S_BLK (1ULL << 18)
{ .mask = H1_EV_H1S_BLK, .name = "h1s_blk", .desc = "H1 stream blocked" },
#define H1_EV_H1S_END (1ULL << 19)
{ .mask = H1_EV_H1S_END, .name = "h1s_end", .desc = "H1 stream terminated" },
#define H1_EV_H1S_ERR (1ULL << 20)
{ .mask = H1_EV_H1S_ERR, .name = "h1s_err", .desc = "error on H1 stream" },
#define H1_EV_STRM_NEW (1ULL << 21)
{ .mask = H1_EV_STRM_NEW, .name = "strm_new", .desc = "app-layer stream creation" },
#define H1_EV_STRM_RECV (1ULL << 22)
{ .mask = H1_EV_STRM_RECV, .name = "strm_recv", .desc = "receiving data for stream" },
#define H1_EV_STRM_SEND (1ULL << 23)
{ .mask = H1_EV_STRM_SEND, .name = "strm_send", .desc = "sending data for stream" },
#define H1_EV_STRM_WAKE (1ULL << 24)
{ .mask = H1_EV_STRM_WAKE, .name = "strm_wake", .desc = "stream woken up" },
#define H1_EV_STRM_SHUT (1ULL << 25)
{ .mask = H1_EV_STRM_SHUT, .name = "strm_shut", .desc = "stream shutdown" },
#define H1_EV_STRM_END (1ULL << 26)
{ .mask = H1_EV_STRM_END, .name = "strm_end", .desc = "detaching app-layer stream" },
#define H1_EV_STRM_ERR (1ULL << 27)
{ .mask = H1_EV_STRM_ERR, .name = "strm_err", .desc = "stream error" },
{ }
};
static const struct name_desc h1_trace_lockon_args[4] = {
/* arg1 */ { /* already used by the connection */ },
/* arg2 */ { .name="h1s", .desc="H1 stream" },
/* arg3 */ { },
/* arg4 */ { }
};
static const struct name_desc h1_trace_decoding[] = {
#define H1_VERB_CLEAN 1
{ .name="clean", .desc="only user-friendly stuff, generally suitable for level \"user\"" },
#define H1_VERB_MINIMAL 2
{ .name="minimal", .desc="report only h1c/h1s state and flags, no real decoding" },
#define H1_VERB_SIMPLE 3
{ .name="simple", .desc="add request/response status line or htx info when available" },
#define H1_VERB_ADVANCED 4
{ .name="advanced", .desc="add header fields or frame decoding when available" },
#define H1_VERB_COMPLETE 5
{ .name="complete", .desc="add full data dump when available" },
{ /* end */ }
};
static struct trace_source trace_h1 __read_mostly = {
.name = IST("h1"),
.desc = "HTTP/1 multiplexer",
.arg_def = TRC_ARG1_CONN, // TRACE()'s first argument is always a connection
.default_cb = h1_trace,
.known_events = h1_trace_events,
.lockon_args = h1_trace_lockon_args,
.decoding = h1_trace_decoding,
.report_events = ~0, // report everything by default
};
#define TRACE_SOURCE &trace_h1
INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);
/* h1 stats module */
enum {
H1_ST_OPEN_CONN,
H1_ST_OPEN_STREAM,
H1_ST_TOTAL_CONN,
H1_ST_TOTAL_STREAM,
H1_ST_BYTES_IN,
H1_ST_BYTES_OUT,
#if defined(USE_LINUX_SPLICE)
H1_ST_SPLICED_BYTES_IN,
H1_ST_SPLICED_BYTES_OUT,
#endif
H1_STATS_COUNT /* must be the last member of the enum */
};
static struct stat_col h1_stats[] = {
[H1_ST_OPEN_CONN] = { .name = "h1_open_connections",
.desc = "Count of currently open connections" },
[H1_ST_OPEN_STREAM] = { .name = "h1_open_streams",
.desc = "Count of currently open streams" },
[H1_ST_TOTAL_CONN] = { .name = "h1_total_connections",
.desc = "Total number of connections" },
[H1_ST_TOTAL_STREAM] = { .name = "h1_total_streams",
.desc = "Total number of streams" },
[H1_ST_BYTES_IN] = { .name = "h1_bytes_in",
.desc = "Total number of bytes received" },
[H1_ST_BYTES_OUT] = { .name = "h1_bytes_out",
.desc = "Total number of bytes send" },
#if defined(USE_LINUX_SPLICE)
[H1_ST_SPLICED_BYTES_IN] = { .name = "h1_spliced_bytes_in",
.desc = "Total number of bytes received using kernel splicing" },
[H1_ST_SPLICED_BYTES_OUT] = { .name = "h1_spliced_bytes_out",
.desc = "Total number of bytes sendusing kernel splicing" },
#endif
};
static struct h1_counters {
long long open_conns; /* count of currently open connections */
long long open_streams; /* count of currently open streams */
long long total_conns; /* total number of connections */
long long total_streams; /* total number of streams */
long long bytes_in; /* number of bytes received */
long long bytes_out; /* number of bytes sent */
#if defined(USE_LINUX_SPLICE)
long long spliced_bytes_in; /* number of bytes received using kernel splicing */
long long spliced_bytes_out; /* number of bytes sent using kernel splicing */
#endif
} h1_counters;
static int h1_fill_stats(void *data, struct field *stats, unsigned int *selected_field)
{
struct h1_counters *counters = data;
unsigned int current_field = (selected_field != NULL ? *selected_field : 0);
for (; current_field < H1_STATS_COUNT; current_field++) {
struct field metric = { 0 };
switch (current_field) {
case H1_ST_OPEN_CONN:
metric = mkf_u64(FN_GAUGE, counters->open_conns);
break;
case H1_ST_OPEN_STREAM:
metric = mkf_u64(FN_GAUGE, counters->open_streams);
break;
case H1_ST_TOTAL_CONN:
metric = mkf_u64(FN_COUNTER, counters->total_conns);
break;
case H1_ST_TOTAL_STREAM:
metric = mkf_u64(FN_COUNTER, counters->total_streams);
break;
case H1_ST_BYTES_IN:
metric = mkf_u64(FN_COUNTER, counters->bytes_in);
break;
case H1_ST_BYTES_OUT:
metric = mkf_u64(FN_COUNTER, counters->bytes_out);
break;
#if defined(USE_LINUX_SPLICE)
case H1_ST_SPLICED_BYTES_IN:
metric = mkf_u64(FN_COUNTER, counters->spliced_bytes_in);
break;
case H1_ST_SPLICED_BYTES_OUT:
metric = mkf_u64(FN_COUNTER, counters->spliced_bytes_out);
break;
#endif
default:
/* not used for frontends. If a specific metric
* is requested, return an error. Otherwise continue.
*/
if (selected_field != NULL)
return 0;
continue;
}
stats[current_field] = metric;
if (selected_field != NULL)
break;
}
return 1;
}
static struct stats_module h1_stats_module = {
.name = "h1",
.fill_stats = h1_fill_stats,
.stats = h1_stats,
.stats_count = H1_STATS_COUNT,
.counters = &h1_counters,
.counters_size = sizeof(h1_counters),
.domain_flags = MK_STATS_PROXY_DOMAIN(STATS_PX_CAP_FE|STATS_PX_CAP_BE),
.clearable = 1,
};
INITCALL1(STG_REGISTER, stats_register_module, &h1_stats_module);
/* the h1c and h1s pools */
DECLARE_STATIC_POOL(pool_head_h1c, "h1c", sizeof(struct h1c));
DECLARE_STATIC_POOL(pool_head_h1s, "h1s", sizeof(struct h1s));
static int h1_recv(struct h1c *h1c);
static int h1_send(struct h1c *h1c);
static int h1_process(struct h1c *h1c);
static void h1_release(struct h1c *h1c);
/* h1_io_cb is exported to see it resolved in "show fd" */
struct task *h1_io_cb(struct task *t, void *ctx, unsigned int state);
struct task *h1_timeout_task(struct task *t, void *context, unsigned int state);
static void h1_shutw_conn(struct connection *conn);
static void h1_wake_stream_for_recv(struct h1s *h1s);
static void h1_wake_stream_for_send(struct h1s *h1s);
static void h1s_destroy(struct h1s *h1s);
/* returns the stconn associated to the H1 stream */
static forceinline struct stconn *h1s_sc(const struct h1s *h1s)
{
return h1s->sd->sc;
}
/* the H1 traces always expect that arg1, if non-null, is of type connection
* (from which we can derive h1c), that arg2, if non-null, is of type h1s, and
* that arg3, if non-null, is a htx for rx/tx headers.
*/
static void h1_trace(enum trace_level level, uint64_t mask, const struct trace_source *src,
const struct ist where, const struct ist func,
const void *a1, const void *a2, const void *a3, const void *a4)
{
const struct connection *conn = a1;
const struct h1c *h1c = conn ? conn->ctx : NULL;
const struct h1s *h1s = a2;
const struct htx *htx = a3;
const size_t *val = a4;
if (!h1c)
h1c = (h1s ? h1s->h1c : NULL);
if (!h1c || src->verbosity < H1_VERB_CLEAN)
return;
/* Display frontend/backend info by default */
chunk_appendf(&trace_buf, " : [%c,%s]", ((h1c->flags & H1C_F_IS_BACK) ? 'B' : 'F'), h1c_st_to_str(h1c->state));
/* Display request and response states if h1s is defined */
if (h1s) {
chunk_appendf(&trace_buf, " [%s, %s]",
h1m_state_str(h1s->req.state), h1m_state_str(h1s->res.state));
if (src->verbosity > H1_VERB_SIMPLE) {
chunk_appendf(&trace_buf, " - req=(.fl=0x%08x .curr_len=%lu .body_len=%lu)",
h1s->req.flags, (unsigned long)h1s->req.curr_len, (unsigned long)h1s->req.body_len);
chunk_appendf(&trace_buf, " res=(.fl=0x%08x .curr_len=%lu .body_len=%lu)",
h1s->res.flags, (unsigned long)h1s->res.curr_len, (unsigned long)h1s->res.body_len);
}
}
if (src->verbosity == H1_VERB_CLEAN)
return;
/* Display the value to the 4th argument (level > STATE) */
if (src->level > TRACE_LEVEL_STATE && val)
chunk_appendf(&trace_buf, " - VAL=%lu", (long)*val);
/* Display status-line if possible (verbosity > MINIMAL) */
if (src->verbosity > H1_VERB_MINIMAL && htx && htx_nbblks(htx)) {
const struct htx_blk *blk = htx_get_head_blk(htx);
const struct htx_sl *sl = htx_get_blk_ptr(htx, blk);
enum htx_blk_type type = htx_get_blk_type(blk);
if (type == HTX_BLK_REQ_SL || type == HTX_BLK_RES_SL)
chunk_appendf(&trace_buf, " - \"%.*s %.*s %.*s\"",
HTX_SL_P1_LEN(sl), HTX_SL_P1_PTR(sl),
HTX_SL_P2_LEN(sl), HTX_SL_P2_PTR(sl),
HTX_SL_P3_LEN(sl), HTX_SL_P3_PTR(sl));
}
/* Display h1c info and, if defined, h1s info (pointer + flags) */
chunk_appendf(&trace_buf, " - h1c=%p(0x%08x)", h1c, h1c->flags);
if (h1c->conn)
chunk_appendf(&trace_buf, " conn=%p(0x%08x)", h1c->conn, h1c->conn->flags);
if (h1s) {
chunk_appendf(&trace_buf, " h1s=%p(0x%08x)", h1s, h1s->flags);
if (h1s->sd)
chunk_appendf(&trace_buf, " sd=%p(0x%08x)", h1s->sd, se_fl_get(h1s->sd));
if (h1s->sd && h1s_sc(h1s))
chunk_appendf(&trace_buf, " sc=%p(0x%08x)", h1s_sc(h1s), h1s_sc(h1s)->flags);
}
if (src->verbosity == H1_VERB_MINIMAL)
return;
/* Display input and output buffer info (level > USER & verbosity > SIMPLE) */
if (src->level > TRACE_LEVEL_USER) {
if (src->verbosity == H1_VERB_COMPLETE ||
(src->verbosity == H1_VERB_ADVANCED && (mask & (H1_EV_H1C_RECV|H1_EV_STRM_RECV))))
chunk_appendf(&trace_buf, " ibuf=%u@%p+%u/%u",
(unsigned int)b_data(&h1c->ibuf), b_orig(&h1c->ibuf),
(unsigned int)b_head_ofs(&h1c->ibuf), (unsigned int)b_size(&h1c->ibuf));
if (src->verbosity == H1_VERB_COMPLETE ||
(src->verbosity == H1_VERB_ADVANCED && (mask & (H1_EV_H1C_SEND|H1_EV_STRM_SEND))))
chunk_appendf(&trace_buf, " obuf=%u@%p+%u/%u",
(unsigned int)b_data(&h1c->obuf), b_orig(&h1c->obuf),
(unsigned int)b_head_ofs(&h1c->obuf), (unsigned int)b_size(&h1c->obuf));
}
/* Display htx info if defined (level > USER) */
if (src->level > TRACE_LEVEL_USER && htx) {
int full = 0;
/* Full htx info (level > STATE && verbosity > SIMPLE) */
if (src->level > TRACE_LEVEL_STATE) {
if (src->verbosity == H1_VERB_COMPLETE)
full = 1;
else if (src->verbosity == H1_VERB_ADVANCED && (mask & (H1_EV_RX_HDRS|H1_EV_TX_HDRS)))
full = 1;
}
chunk_memcat(&trace_buf, "\n\t", 2);
htx_dump(&trace_buf, htx, full);
}
}
/*****************************************************/
/* functions below are for dynamic buffer management */
/*****************************************************/
/*
* Indicates whether or not we may receive data. The rules are the following :
* - if an error or a shutdown for reads was detected on the H1 connection we
* must not attempt to receive
* - if we are waiting for the connection establishment, we must not attempt
* to receive
* - if reads are explicitly disabled, we must not attempt to receive
* - if the input buffer failed to be allocated or is full , we must not try
* to receive
* - if the mux is blocked on an input condition, we must may not attempt to
* receive
* - otherwise we may attempt to receive
*/
static inline int h1_recv_allowed(const struct h1c *h1c)
{
if (h1c->flags & (H1C_F_EOS|H1C_F_ERROR)) {
TRACE_DEVEL("recv not allowed because of (eos|error) on h1c", H1_EV_H1C_RECV|H1_EV_H1C_BLK, h1c->conn);
return 0;
}
if (h1c->conn->flags & (CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) {
TRACE_DEVEL("recv not allowed because of (waitl4|waitl6) on connection", H1_EV_H1C_RECV|H1_EV_H1C_BLK, h1c->conn);
return 0;
}
if ((h1c->flags & (H1C_F_IN_ALLOC|H1C_F_IN_FULL|H1C_F_IN_SALLOC))) {
TRACE_DEVEL("recv not allowed because input is blocked", H1_EV_H1C_RECV|H1_EV_H1C_BLK, h1c->conn);
return 0;
}
return 1;
}
/*
* Tries to grab a buffer and to re-enables processing on mux <target>. The h1
* flags are used to figure what buffer was requested. It returns 1 if the
* allocation succeeds, in which case the connection is woken up, or 0 if it's
* impossible to wake up and we prefer to be woken up later.
*/
static int h1_buf_available(void *target)
{
struct h1c *h1c = target;
if (h1c->flags & H1C_F_IN_ALLOC) {
h1c->flags &= ~H1C_F_IN_ALLOC;
h1c->flags |= H1C_F_IN_MAYALLOC;
}
if ((h1c->flags & H1C_F_OUT_ALLOC) && h1c->h1s) {
TRACE_STATE("unblocking h1s, obuf allocatable", H1_EV_TX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1c->h1s);
h1c->flags &= ~H1C_F_OUT_ALLOC;
h1c->flags |= H1C_F_OUT_MAYALLOC;
h1_wake_stream_for_send(h1c->h1s);
}
if ((h1c->flags & H1C_F_IN_SALLOC) && h1c->h1s) {
TRACE_STATE("unblocking h1c, stream rxbuf allocatable", H1_EV_H1C_RECV|H1_EV_H1C_BLK|H1_EV_H1C_WAKE, h1c->conn);
h1c->flags &= ~H1C_F_IN_SALLOC;
h1c->flags |= H1C_F_IN_SMAYALLOC;
tasklet_wakeup(h1c->wait_event.tasklet);
}
if ((h1c->flags & H1C_F_IN_MAYALLOC) && h1_recv_allowed(h1c)) {
TRACE_STATE("unblocking h1c, ibuf allocatable", H1_EV_H1C_RECV|H1_EV_H1C_BLK|H1_EV_H1C_WAKE, h1c->conn);
tasklet_wakeup(h1c->wait_event.tasklet);
}
return 1;
}
/*
* Allocate the h1c's ibuf. If if fails, it adds the mux in buffer wait queue,
* and sets the H1C_F_IN_ALLOC flag on the connection. It will advertise a more
* urgent allocation when a stream is already present than when none is present
* since in one case a buffer might be needed to permit to release another one,
* while in the other case we've simply not started anything.
*/
static inline struct buffer *h1_get_ibuf(struct h1c *h1c)
{
struct buffer *buf;
if (unlikely((buf = b_alloc(&h1c->ibuf, DB_MUX_RX |
((h1c->flags & H1C_F_IN_MAYALLOC) ? DB_F_NOQUEUE : 0))) == NULL)) {
b_queue(DB_MUX_RX, &h1c->buf_wait, h1c, h1_buf_available);
h1c->flags |= H1C_F_IN_ALLOC;
}
else
h1c->flags &= ~H1C_F_IN_MAYALLOC;
return buf;
}
/*
* Allocate the h1c's obuf. If if fails, it adds the mux in buffer wait queue,
* and sets the H1C_F_OUT_ALLOC flag on the connection.
*/
static inline struct buffer *h1_get_obuf(struct h1c *h1c)
{
struct buffer *buf;
if (unlikely((buf = b_alloc(&h1c->obuf, DB_MUX_TX |
((h1c->flags & H1C_F_OUT_MAYALLOC) ? DB_F_NOQUEUE : 0))) == NULL)) {
b_queue(DB_MUX_TX, &h1c->buf_wait, h1c, h1_buf_available);
h1c->flags |= H1C_F_OUT_ALLOC;
}
else
h1c->flags &= ~H1C_F_OUT_MAYALLOC;
return buf;
}
/*
* Allocate the h1s's rxbuf. If if fails, it adds the mux in buffer wait queue,
* and sets the H1C_F_IN_SALLOC flag on the connection.
*/
static inline struct buffer *h1_get_rxbuf(struct h1s *h1s)
{
struct h1c *h1c = h1s->h1c;
struct buffer *buf;
if (unlikely((buf = b_alloc(&h1s->rxbuf, DB_SE_RX |
((h1c->flags & H1C_F_IN_SMAYALLOC) ? DB_F_NOQUEUE : 0))) == NULL)) {
b_queue(DB_SE_RX, &h1c->buf_wait, h1c, h1_buf_available);
h1c->flags |= H1C_F_IN_SALLOC;
}
else
h1c->flags &= ~H1C_F_IN_SMAYALLOC;
return buf;
}
/*
* Release a buffer, if any, and try to wake up entities waiting in the buffer
* wait queue.
*/
static inline void h1_release_buf(struct h1c *h1c, struct buffer *bptr)
{
if (bptr->size) {
b_free(bptr);
offer_buffers(h1c->buf_wait.target, 1);
}
}
/* Returns 1 if the H1 connection is alive (IDLE, EMBRYONIC, RUNNING or
* DRAINING). Ortherwise 0 is returned.
*/
static inline int h1_is_alive(const struct h1c *h1c)
{
return (h1c->state <= H1_CS_DRAINING);
}
/* Switch the H1 connection to CLOSING or CLOSED mode, depending on the output
* buffer state and if there is still a H1 stream or not. If there are sill
* pending outgoing data or if there is still a H1 stream, it is set to CLOSING
* state. Otherwise it is set to CLOSED mode. */
static inline void h1_close(struct h1c *h1c)
{
h1c->state = ((h1c->h1s || b_data(&h1c->obuf)) ? H1_CS_CLOSING : H1_CS_CLOSED);
}
/* returns the number of streams in use on a connection to figure if it's idle
* or not. We rely on H1C state to know if the connection is in-use or not. It
* is IDLE only when no H1 stream is attached and when the previous stream, if
* any, was fully terminated without any error and in K/A mode.
*/
static int h1_used_streams(struct connection *conn)
{
struct h1c *h1c = conn->ctx;
return ((h1c->state == H1_CS_IDLE) ? 0 : 1);
}
/* returns the number of streams still available on a connection */
static int h1_avail_streams(struct connection *conn)
{
return 1 - h1_used_streams(conn);
}
/* Refresh the h1c task timeout if necessary */
static void h1_refresh_timeout(struct h1c *h1c)
{
int is_idle_conn = 0;
if (h1c->task) {
if (!h1_is_alive(h1c)) {
/* half-closed or dead connections : switch to clientfin/serverfin
* timeouts so that we don't hang too long on clients that have
* gone away (especially in tunnel mode).
*/
h1c->task->expire = tick_add(now_ms, h1c->shut_timeout);
TRACE_DEVEL("refreshing connection's timeout (dead or half-closed)", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn);
is_idle_conn = 1;
}
else if (b_data(&h1c->obuf)) {
/* alive connection with pending outgoing data, need a timeout (server or client). */
h1c->task->expire = tick_add(now_ms, h1c->timeout);
TRACE_DEVEL("refreshing connection's timeout (pending outgoing data)", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn);
}
else if (!(h1c->flags & H1C_F_IS_BACK) && (h1c->state == H1_CS_IDLE)) {
/* idle front connections. */
h1c->task->expire = (tick_isset(h1c->idle_exp) ? h1c->idle_exp : tick_add(now_ms, h1c->timeout));
TRACE_DEVEL("refreshing connection's timeout (idle front h1c)", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn);
is_idle_conn = 1;
}
else if (!(h1c->flags & H1C_F_IS_BACK) && (h1c->state != H1_CS_RUNNING)) {
/* alive front connections waiting for a fully usable stream need a timeout. */
h1c->task->expire = tick_add(now_ms, h1c->timeout);
TRACE_DEVEL("refreshing connection's timeout (alive front h1c but not ready)", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn);
/* A frontend connection not yet ready could be treated the same way as an idle
* one in case of soft-close.
*/
is_idle_conn = 1;
}
else {
/* alive back connections of front connections with a stream connector attached */
h1c->task->expire = TICK_ETERNITY;
TRACE_DEVEL("no connection timeout (alive back h1c or front h1c with an SC)", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn);
}
/* Finally set the idle expiration date if shorter */
h1c->task->expire = tick_first(h1c->task->expire, h1c->idle_exp);
if ((h1c->px->flags & (PR_FL_DISABLED|PR_FL_STOPPED)) &&
is_idle_conn && tick_isset(global.close_spread_end)) {
/* If a soft-stop is in progress and a close-spread-time
* is set, we want to spread idle connection closing roughly
* evenly across the defined window. This should only
* act on idle frontend connections.
* If the window end is already in the past, we wake the
* timeout task up immediately so that it can be closed.
*/
int remaining_window = tick_remain(now_ms, global.close_spread_end);
if (remaining_window) {
/* We don't need to reset the expire if it would
* already happen before the close window end.
*/
if (tick_is_le(global.close_spread_end, h1c->task->expire)) {
/* Set an expire value shorter than the current value
* because the close spread window end comes earlier.
*/
h1c->task->expire = tick_add(now_ms, statistical_prng_range(remaining_window));
TRACE_DEVEL("connection timeout set to value before close-spread window end", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn);
}
}
else {
/* We are past the soft close window end, wake the timeout
* task up immediately.
*/
task_wakeup(h1c->task, TASK_WOKEN_TIMER);
}
}
TRACE_DEVEL("new expiration date", H1_EV_H1C_SEND|H1_EV_H1C_RECV, h1c->conn, 0, 0, (size_t[]){h1c->task->expire});
task_queue(h1c->task);
}
}
static void h1_set_idle_expiration(struct h1c *h1c)
{
if (h1c->flags & H1C_F_IS_BACK || !h1c->task) {
TRACE_DEVEL("no idle expiration (backend connection || no task)", H1_EV_H1C_RECV, h1c->conn);
h1c->idle_exp = TICK_ETERNITY;
return;
}
if (h1c->state == H1_CS_IDLE) {
if (!tick_isset(h1c->idle_exp)) {
if ((h1c->flags & H1C_F_WAIT_NEXT_REQ) && /* Not the first request */
!b_data(&h1c->ibuf) && /* No input data */
tick_isset(h1c->px->timeout.httpka)) { /* K-A timeout set */
h1c->idle_exp = tick_add_ifset(now_ms, h1c->px->timeout.httpka);
TRACE_DEVEL("set idle expiration (keep-alive timeout)", H1_EV_H1C_RECV, h1c->conn);
}
else {
h1c->idle_exp = tick_add_ifset(now_ms, h1c->px->timeout.httpreq);
TRACE_DEVEL("set idle expiration (http-request timeout)", H1_EV_H1C_RECV, h1c->conn);
}
}
}
else if (h1c->state < H1_CS_RUNNING) {
if (!tick_isset(h1c->idle_exp)) {
h1c->idle_exp = tick_add_ifset(now_ms, h1c->px->timeout.httpreq);
TRACE_DEVEL("set idle expiration (http-request timeout)", H1_EV_H1C_RECV, h1c->conn);
}
}
else {
h1c->idle_exp = TICK_ETERNITY;
TRACE_DEVEL("unset idle expiration (running or closing)", H1_EV_H1C_RECV, h1c->conn);
}
}
/*****************************************************************/
/* functions below are dedicated to the mux setup and management */
/*****************************************************************/
/* returns non-zero if there are input data pending for stream h1s. */
static inline size_t h1s_data_pending(const struct h1s *h1s)
{
const struct h1m *h1m;
h1m = ((h1s->h1c->flags & H1C_F_IS_BACK) ? &h1s->res : &h1s->req);
return ((h1m->state == H1_MSG_DONE) ? 0 : b_data(&h1s->h1c->ibuf));
}
/* Creates a new stream connector and the associate stream. <input> is used as input
* buffer for the stream. On success, it is transferred to the stream and the
* mux is no longer responsible of it. On error, <input> is unchanged, thus the
* mux must still take care of it. However, there is nothing special to do
* because, on success, <input> is updated to points on BUF_NULL. Thus, calling
* b_free() on it is always safe. This function returns the stream connector on
* success or NULL on error. */
static struct stconn *h1s_new_sc(struct h1s *h1s, struct buffer *input)
{
struct h1c *h1c = h1s->h1c;
TRACE_ENTER(H1_EV_STRM_NEW, h1c->conn, h1s);
if (h1s->flags & H1S_F_NOT_FIRST)
se_fl_set(h1s->sd, SE_FL_NOT_FIRST);
if (h1s->req.flags & H1_MF_UPG_WEBSOCKET)
se_fl_set(h1s->sd, SE_FL_WEBSOCKET);
if (!sc_new_from_endp(h1s->sd, h1c->conn->owner, input)) {
TRACE_ERROR("SC allocation failure", H1_EV_STRM_NEW|H1_EV_STRM_END|H1_EV_STRM_ERR, h1c->conn, h1s);
goto err;
}
h1c->state = H1_CS_RUNNING;
TRACE_LEAVE(H1_EV_STRM_NEW, h1c->conn, h1s);
return h1s_sc(h1s);
err:
TRACE_DEVEL("leaving on error", H1_EV_STRM_NEW|H1_EV_STRM_ERR, h1c->conn, h1s);
return NULL;
}
static struct stconn *h1s_upgrade_sc(struct h1s *h1s, struct buffer *input)
{
TRACE_ENTER(H1_EV_STRM_NEW, h1s->h1c->conn, h1s);
if (stream_upgrade_from_sc(h1s_sc(h1s), input) < 0) {
TRACE_ERROR("stream upgrade failure", H1_EV_STRM_NEW|H1_EV_STRM_END|H1_EV_STRM_ERR, h1s->h1c->conn, h1s);
goto err;
}
h1s->h1c->state = H1_CS_RUNNING;
TRACE_LEAVE(H1_EV_STRM_NEW, h1s->h1c->conn, h1s);
return h1s_sc(h1s);
err:
TRACE_DEVEL("leaving on error", H1_EV_STRM_NEW|H1_EV_STRM_ERR, h1s->h1c->conn, h1s);
return NULL;
}
static struct h1s *h1s_new(struct h1c *h1c)
{
struct h1s *h1s;
TRACE_ENTER(H1_EV_H1S_NEW, h1c->conn);
h1s = pool_alloc(pool_head_h1s);
if (!h1s) {
TRACE_ERROR("H1S allocation failure", H1_EV_H1S_NEW|H1_EV_H1S_END|H1_EV_H1S_ERR, h1c->conn);
goto fail;
}
h1s->h1c = h1c;
h1c->h1s = h1s;
h1s->sess = NULL;
h1s->sd = NULL;
h1s->flags = H1S_F_WANT_KAL;
h1s->subs = NULL;
h1s->rxbuf = BUF_NULL;
memset(h1s->ws_key, 0, sizeof(h1s->ws_key));
h1m_init_req(&h1s->req);
h1s->req.flags |= (H1_MF_NO_PHDR|H1_MF_CLEAN_CONN_HDR);
h1m_init_res(&h1s->res);
h1s->res.flags |= (H1_MF_NO_PHDR|H1_MF_CLEAN_CONN_HDR);
h1s->status = 0;
h1s->meth = HTTP_METH_OTHER;
if (h1c->flags & H1C_F_WAIT_NEXT_REQ)
h1s->flags |= H1S_F_NOT_FIRST;
h1s->h1c->state = H1_CS_EMBRYONIC;
h1s->h1c->flags &= ~H1C_F_WAIT_NEXT_REQ;
TRACE_LEAVE(H1_EV_H1S_NEW, h1c->conn, h1s);
return h1s;
fail:
TRACE_DEVEL("leaving on error", H1_EV_STRM_NEW|H1_EV_STRM_ERR, h1c->conn);
return NULL;
}
static struct h1s *h1c_frt_stream_new(struct h1c *h1c, struct stconn *sc, struct session *sess)
{
struct h1s *h1s;
TRACE_ENTER(H1_EV_H1S_NEW, h1c->conn);
h1s = h1s_new(h1c);
if (!h1s)
goto fail;
if (sc) {
if (sc_attach_mux(sc, h1s, h1c->conn) < 0)
goto fail;
h1s->sd = sc->sedesc;
}
else {
h1s->sd = sedesc_new();
if (!h1s->sd)
goto fail;
h1s->sd->se = h1s;
h1s->sd->conn = h1c->conn;
se_fl_set(h1s->sd, SE_FL_T_MUX | SE_FL_ORPHAN);
}
/* When a request starts, the H1S does not expect data while the request
* is not finished. It does not mean the response must not be received,
* especially if headers were already forwarded. But it is not
* mandatory.
*/
if (!(global.tune.no_zero_copy_fwd & NO_ZERO_COPY_FWD_H1_SND))
se_fl_set(h1s->sd, SE_FL_MAY_FASTFWD_CONS);
se_expect_no_data(h1s->sd);
h1s->sess = sess;
if (h1c->px->options2 & PR_O2_REQBUG_OK)
h1s->req.err_pos = -1;
HA_ATOMIC_INC(&h1c->px_counters->open_streams);
HA_ATOMIC_INC(&h1c->px_counters->total_streams);
h1c->idle_exp = TICK_ETERNITY;
h1_set_idle_expiration(h1c);
TRACE_LEAVE(H1_EV_H1S_NEW, h1c->conn, h1s);
return h1s;
fail:
TRACE_DEVEL("leaving on error", H1_EV_STRM_NEW|H1_EV_STRM_ERR, h1c->conn);
h1s_destroy(h1s);
return NULL;
}
static struct h1s *h1c_bck_stream_new(struct h1c *h1c, struct stconn *sc, struct session *sess)
{
struct h1s *h1s;
TRACE_ENTER(H1_EV_H1S_NEW, h1c->conn);
h1s = h1s_new(h1c);
if (!h1s)
goto fail;
if (sc_attach_mux(sc, h1s, h1c->conn) < 0)
goto fail;
h1s->flags |= H1S_F_RX_BLK;
h1s->sd = sc->sedesc;
h1s->sess = sess;
if (!(global.tune.no_zero_copy_fwd & NO_ZERO_COPY_FWD_H1_SND))
se_fl_set(h1s->sd, SE_FL_MAY_FASTFWD_CONS);
h1c->state = H1_CS_RUNNING;
if (h1c->px->options2 & PR_O2_RSPBUG_OK)
h1s->res.err_pos = -1;
HA_ATOMIC_INC(&h1c->px_counters->open_streams);
HA_ATOMIC_INC(&h1c->px_counters->total_streams);
TRACE_LEAVE(H1_EV_H1S_NEW, h1c->conn, h1s);
return h1s;
fail:
TRACE_DEVEL("leaving on error", H1_EV_STRM_NEW|H1_EV_STRM_ERR, h1c->conn);
h1s_destroy(h1s);
return NULL;
}
static void h1s_destroy(struct h1s *h1s)
{
if (h1s) {
struct h1c *h1c = h1s->h1c;
TRACE_POINT(H1_EV_H1S_END, h1c->conn, h1s);
h1c->h1s = NULL;
if (h1s->subs)
h1s->subs->events = 0;
h1_release_buf(h1c, &h1s->rxbuf);
h1c->flags &= ~(H1C_F_WANT_FASTFWD|
H1C_F_OUT_FULL|H1C_F_OUT_ALLOC|H1C_F_OUT_MAYALLOC|
H1C_F_IN_SALLOC|H1C_F_IN_SMAYALLOC|
H1C_F_CO_MSG_MORE|H1C_F_CO_STREAMER);
if (!(h1c->flags & (H1C_F_EOS|H1C_F_ERR_PENDING|H1C_F_ERROR|H1C_F_ABRT_PENDING|H1C_F_ABRTED)) && /* No error/read0/abort */
h1_is_alive(h1c) && /* still alive */
(h1s->flags & H1S_F_WANT_KAL) && /* K/A possible */
h1s->req.state == H1_MSG_DONE && h1s->res.state == H1_MSG_DONE) { /* req/res in DONE state */
h1c->state = H1_CS_IDLE;
h1c->flags |= H1C_F_WAIT_NEXT_REQ;
h1c->req_count++;
TRACE_STATE("set idle mode on h1c, waiting for the next request", H1_EV_H1C_ERR, h1c->conn, h1s);
}
else {
h1_close(h1c);
TRACE_STATE("close h1c", H1_EV_H1S_END, h1c->conn, h1s);
}
HA_ATOMIC_DEC(&h1c->px_counters->open_streams);
BUG_ON(h1s->sd && !se_fl_test(h1s->sd, SE_FL_ORPHAN));
sedesc_free(h1s->sd);
pool_free(pool_head_h1s, h1s);
}
}
/* Check if shutdown performed of an an H1S must lead to a connection shutdown
* of if it can be kept alive. It returns 1 if the connection must be shut down
* and 0 it if can be kept alive.
*/
static int h1s_must_shut_conn(struct h1s *h1s)
{
struct h1c *h1c = h1s->h1c;
int ret;
TRACE_ENTER(H1_EV_STRM_SHUT, h1c->conn, h1s);
if (se_fl_test(h1s->sd, SE_FL_KILL_CONN)) {
TRACE_STATE("stream wants to kill the connection", H1_EV_STRM_SHUT, h1c->conn, h1s);
ret = 1;
}
else if (h1c->state == H1_CS_CLOSING || (h1c->flags & (H1C_F_EOS|H1C_F_ERR_PENDING|H1C_F_ERROR))) {
TRACE_STATE("shutdown on connection (EOS || CLOSING || ERROR)", H1_EV_STRM_SHUT, h1c->conn, h1s);
ret = 1;
}
else if (h1c->state == H1_CS_UPGRADING) {
TRACE_STATE("keep connection alive (UPGRADING)", H1_EV_STRM_SHUT, h1c->conn, h1s);
ret = 0;
}
else if (!(h1c->flags & H1C_F_IS_BACK) && h1s->req.state != H1_MSG_DONE && h1s->res.state == H1_MSG_DONE) {
TRACE_STATE("defer shutdown to drain request first", H1_EV_STRM_SHUT, h1c->conn, h1s);
ret = 0;
}
else if (((h1s->flags & H1S_F_WANT_KAL) && h1s->req.state == H1_MSG_DONE && h1s->res.state == H1_MSG_DONE)) {
TRACE_STATE("keep connection alive (want_kal)", H1_EV_STRM_SHUT, h1c->conn, h1s);
ret = 0;
}
else {
/* The default case, do the shutdown */
ret = 1;
}
TRACE_LEAVE(H1_EV_STRM_SHUT, h1c->conn, h1s);
return ret;
}
/* Really detach the H1S. Most of time of it called from h1_detach() when the
* stream is detached from the connection. But if the request message must be
* drained first, the detach is deferred.
*/
static void h1s_finish_detach(struct h1s *h1s)
{
struct h1c *h1c;
struct session *sess;
int is_not_first;
TRACE_ENTER(H1_EV_STRM_END, h1s ? h1s->h1c->conn : NULL, h1s);
sess = h1s->sess;
h1c = h1s->h1c;
sess->accept_date = date;
sess->accept_ts = now_ns;
sess->t_handshake = 0;
sess->t_idle = -1;
is_not_first = h1s->flags & H1S_F_NOT_FIRST;
h1s_destroy(h1s);
if (h1c->state == H1_CS_IDLE && (h1c->flags & H1C_F_IS_BACK)) {
/* this connection may be killed at any moment, we want it to
* die "cleanly" (i.e. only an RST).
*/
h1c->flags |= H1C_F_SILENT_SHUT;
/* If there are any excess server data in the input buffer,
* release it and close the connection ASAP (some data may
* remain in the output buffer). This happens if a server sends
* invalid responses. So in such case, we don't want to reuse
* the connection
*/
if (b_data(&h1c->ibuf)) {
h1_release_buf(h1c, &h1c->ibuf);
h1_close(h1c);
TRACE_DEVEL("remaining data on detach, kill connection", H1_EV_STRM_END|H1_EV_H1C_END);
goto release;
}
if (h1c->conn->flags & CO_FL_PRIVATE) {
/* Add the connection in the session server list, if not already done */
if (!session_add_conn(sess, h1c->conn, h1c->conn->target)) {
h1c->conn->owner = NULL;
h1c->conn->mux->destroy(h1c);
goto end;
}
/* Always idle at this step */
/* mark that the tasklet may lose its context to another thread and
* that the handler needs to check it under the idle conns lock.
*/
HA_ATOMIC_OR(&h1c->wait_event.tasklet->state, TASK_F_USR1);
if (session_check_idle_conn(sess, h1c->conn)) {
/* The connection got destroyed, let's leave */
TRACE_DEVEL("outgoing connection killed", H1_EV_STRM_END|H1_EV_H1C_END);
goto end;
}
}
else {
if (h1c->conn->owner == sess)
h1c->conn->owner = NULL;
/* mark that the tasklet may lose its context to another thread and
* that the handler needs to check it under the idle conns lock.
*/
HA_ATOMIC_OR(&h1c->wait_event.tasklet->state, TASK_F_USR1);
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
xprt_set_idle(h1c->conn, h1c->conn->xprt, h1c->conn->xprt_ctx);
if (!srv_add_to_idle_list(objt_server(h1c->conn->target), h1c->conn, is_not_first)) {
/* The server doesn't want it, let's kill the connection right away */
h1c->conn->mux->destroy(h1c);
TRACE_DEVEL("outgoing connection killed", H1_EV_STRM_END|H1_EV_H1C_END);
goto end;
}
/* At this point, the connection has been added to the
* server idle list, so another thread may already have
* hijacked it, so we can't do anything with it.
*/
return;
}
}
release:
/* We don't want to close right now unless the connection is in error or shut down for writes */
if ((h1c->flags & H1C_F_ERROR) ||
(h1c->state == H1_CS_CLOSED) ||
(h1c->state == H1_CS_CLOSING && !b_data(&h1c->obuf)) ||
!h1c->conn->owner) {
TRACE_DEVEL("killing dead connection", H1_EV_STRM_END, h1c->conn);
h1_release(h1c);
}
else {
if (h1c->state == H1_CS_IDLE) {
/* If we have a new request, process it immediately or
* subscribe for reads waiting for new data
*/
if (unlikely(b_data(&h1c->ibuf))) {
if (h1_process(h1c) == -1)
goto end;
}
else
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
h1_set_idle_expiration(h1c);
h1_refresh_timeout(h1c);
}
end:
TRACE_LEAVE(H1_EV_STRM_END);
}
/*
* Initialize the mux once it's attached. It is expected that conn->ctx points
* to the existing stream connector (for outgoing connections or for incoming
* ones during a mux upgrade) or NULL (for incoming ones during the connection
* establishment). <input> is always used as Input buffer and may contain
* data. It is the caller responsibility to not reuse it anymore. Returns < 0 on
* error.
*/
static int h1_init(struct connection *conn, struct proxy *proxy, struct session *sess,
struct buffer *input)
{
struct h1c *h1c;
struct task *t = NULL;
void *conn_ctx = conn->ctx;
TRACE_ENTER(H1_EV_H1C_NEW);
h1c = pool_alloc(pool_head_h1c);
if (!h1c) {
TRACE_ERROR("H1C allocation failure", H1_EV_H1C_NEW|H1_EV_H1C_END|H1_EV_H1C_ERR);
goto fail_h1c;
}
h1c->conn = conn;
h1c->px = proxy;
h1c->state = H1_CS_IDLE;
h1c->flags = H1C_F_NONE;
h1c->errcode = 0;
h1c->ibuf = *input;
h1c->obuf = BUF_NULL;
h1c->h1s = NULL;
h1c->task = NULL;
h1c->req_count = 0;
LIST_INIT(&h1c->buf_wait.list);
h1c->wait_event.tasklet = tasklet_new();
if (!h1c->wait_event.tasklet)
goto fail;
h1c->wait_event.tasklet->process = h1_io_cb;
h1c->wait_event.tasklet->context = h1c;
h1c->wait_event.events = 0;
h1c->idle_exp = TICK_ETERNITY;
if (conn_is_back(conn)) {
h1c->flags |= H1C_F_IS_BACK;
h1c->shut_timeout = h1c->timeout = proxy->timeout.server;
if (tick_isset(proxy->timeout.serverfin))
h1c->shut_timeout = proxy->timeout.serverfin;
h1c->px_counters = EXTRA_COUNTERS_GET(proxy->extra_counters_be,
&h1_stats_module);
} else {
h1c->shut_timeout = h1c->timeout = proxy->timeout.client;
if (tick_isset(proxy->timeout.clientfin))
h1c->shut_timeout = proxy->timeout.clientfin;
h1c->px_counters = EXTRA_COUNTERS_GET(proxy->extra_counters_fe,
&h1_stats_module);
LIST_APPEND(&mux_stopping_data[tid].list,
&h1c->conn->stopping_list);
}
if (tick_isset(h1c->timeout)) {
t = task_new_here();
if (!t) {
TRACE_ERROR("H1C task allocation failure", H1_EV_H1C_NEW|H1_EV_H1C_END|H1_EV_H1C_ERR);
goto fail;
}
h1c->task = t;
t->process = h1_timeout_task;
t->context = h1c;
t->expire = tick_add(now_ms, h1c->timeout);
}
conn->ctx = h1c;
if (h1c->flags & H1C_F_IS_BACK) {
/* Create a new H1S now for backend connection only */
if (!h1c_bck_stream_new(h1c, conn_ctx, sess))
goto fail;
}
else if (conn_ctx) {
/* Upgraded frontend connection (from TCP) */
if (!h1c_frt_stream_new(h1c, conn_ctx, h1c->conn->owner))
goto fail;
/* Attach the SC but Not ready yet */
h1c->state = H1_CS_UPGRADING;
TRACE_DEVEL("Inherit the SC from TCP connection to perform an upgrade",
H1_EV_H1C_NEW|H1_EV_STRM_NEW, h1c->conn, h1c->h1s);
}
if (t) {
h1_set_idle_expiration(h1c);
t->expire = tick_first(t->expire, h1c->idle_exp);
task_queue(t);
}
/* prepare to read something */
if (b_data(&h1c->ibuf))
tasklet_wakeup(h1c->wait_event.tasklet);
else if (h1_recv_allowed(h1c))
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
if (!conn_is_back(conn))
proxy_inc_fe_cum_sess_ver_ctr(sess->listener, proxy, 1);
HA_ATOMIC_INC(&h1c->px_counters->open_conns);
HA_ATOMIC_INC(&h1c->px_counters->total_conns);
/* mux->wake will be called soon to complete the operation */
TRACE_LEAVE(H1_EV_H1C_NEW, conn, h1c->h1s);
return 0;
fail:
task_destroy(t);
tasklet_free(h1c->wait_event.tasklet);
pool_free(pool_head_h1c, h1c);
fail_h1c:
if (!conn_is_back(conn))
LIST_DEL_INIT(&conn->stopping_list);
conn->ctx = conn_ctx; // restore saved context
TRACE_DEVEL("leaving in error", H1_EV_H1C_NEW|H1_EV_H1C_END|H1_EV_H1C_ERR);
return -1;
}
/* release function. This one should be called to free all resources allocated
* to the mux.
*/
static void h1_release(struct h1c *h1c)
{
struct connection *conn = NULL;
TRACE_POINT(H1_EV_H1C_END);
/* The connection must be aattached to this mux to be released */
if (h1c->conn && h1c->conn->ctx == h1c)
conn = h1c->conn;
if (conn && h1c->flags & H1C_F_UPG_H2C) {
TRACE_DEVEL("upgrading H1 to H2", H1_EV_H1C_END, conn);
/* Make sure we're no longer subscribed to anything */
if (h1c->wait_event.events)
conn->xprt->unsubscribe(conn, conn->xprt_ctx,
h1c->wait_event.events, &h1c->wait_event);
if (conn_upgrade_mux_fe(conn, NULL, &h1c->ibuf, ist("h2"), PROTO_MODE_HTTP) != -1) {
/* connection successfully upgraded to H2, this
* mux was already released */
return;
}
TRACE_ERROR("h2 upgrade failed", H1_EV_H1C_END|H1_EV_H1C_ERR, conn);
sess_log(conn->owner); /* Log if the upgrade failed */
}
b_dequeue(&h1c->buf_wait);
h1_release_buf(h1c, &h1c->ibuf);
h1_release_buf(h1c, &h1c->obuf);
if (h1c->task) {
h1c->task->context = NULL;
task_wakeup(h1c->task, TASK_WOKEN_OTHER);
h1c->task = NULL;
}
if (h1c->wait_event.tasklet) {
tasklet_free(h1c->wait_event.tasklet);
h1c->wait_event.tasklet = NULL;
}
h1s_destroy(h1c->h1s);
if (conn) {
if (h1c->wait_event.events != 0)
conn->xprt->unsubscribe(conn, conn->xprt_ctx, h1c->wait_event.events,
&h1c->wait_event);
h1_shutw_conn(conn);
}
HA_ATOMIC_DEC(&h1c->px_counters->open_conns);
pool_free(pool_head_h1c, h1c);
if (conn) {
if (!conn_is_back(conn))
LIST_DEL_INIT(&conn->stopping_list);
conn->mux = NULL;
conn->ctx = NULL;
TRACE_DEVEL("freeing conn", H1_EV_H1C_END, conn);
conn_stop_tracking(conn);
conn_full_close(conn);
if (conn->destroy_cb)
conn->destroy_cb(conn);
conn_free(conn);
}
}
/******************************************************/
/* functions below are for the H1 protocol processing */
/******************************************************/
/* Parse the request version and set H1_MF_VER_11 on <h1m> if the version is
* greater or equal to 1.1
*/
static void h1_parse_req_vsn(struct h1m *h1m, const struct htx_sl *sl)
{
const char *p = HTX_SL_REQ_VPTR(sl);
if ((HTX_SL_REQ_VLEN(sl) == 8) &&
(*(p + 5) > '1' ||
(*(p + 5) == '1' && *(p + 7) >= '1')))
h1m->flags |= H1_MF_VER_11;
}
/* Parse the response version and set H1_MF_VER_11 on <h1m> if the version is
* greater or equal to 1.1
*/
static void h1_parse_res_vsn(struct h1m *h1m, const struct htx_sl *sl)
{
const char *p = HTX_SL_RES_VPTR(sl);
if ((HTX_SL_RES_VLEN(sl) == 8) &&
(*(p + 5) > '1' ||
(*(p + 5) == '1' && *(p + 7) >= '1')))
h1m->flags |= H1_MF_VER_11;
}
/* Deduce the connection mode of the client connection, depending on the
* configuration and the H1 message flags. This function is called twice, the
* first time when the request is parsed and the second time when the response
* is parsed.
*/
static void h1_set_cli_conn_mode(struct h1s *h1s, struct h1m *h1m)
{
struct proxy *fe = h1s->h1c->px;
if (h1m->flags & H1_MF_RESP) {
/* Output direction: second pass */
if ((h1s->meth == HTTP_METH_CONNECT && h1s->status >= 200 && h1s->status < 300) ||
h1s->status == 101) {
/* Either we've established an explicit tunnel, or we're
* switching the protocol. In both cases, we're very unlikely to
* understand the next protocols. We have to switch to tunnel
* mode, so that we transfer the request and responses then let
* this protocol pass unmodified. When we later implement
* specific parsers for such protocols, we'll want to check the
* Upgrade header which contains information about that protocol
* for responses with status 101 (eg: see RFC2817 about TLS).
*/
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_TUN;
TRACE_STATE("set tunnel mode (resp)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
else if (h1s->flags & H1S_F_WANT_KAL) {
/* By default the client is in KAL mode. CLOSE mode mean
* it is imposed by the client itself. So only change
* KAL mode here. */
if (!(h1m->flags & H1_MF_XFER_LEN) || (h1m->flags & H1_MF_CONN_CLO)) {
/* no length known or explicit close => close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("detect close mode (resp)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
else if (!(h1m->flags & H1_MF_CONN_KAL) &&
(fe->options & PR_O_HTTP_MODE) == PR_O_HTTP_CLO) {
/* no explicit keep-alive and option httpclose => close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("force close mode (resp)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
}
}
else {
/* Input direction: first pass */
if (!(h1m->flags & (H1_MF_VER_11|H1_MF_CONN_KAL)) || h1m->flags & H1_MF_CONN_CLO) {
/* no explicit keep-alive in HTTP/1.0 or explicit close => close*/
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("detect close mode (req)", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s);
}
}
/* If KAL, check if the frontend is stopping. If yes, switch in CLO mode
* unless a 'close-spread-time' option is set (either to define a
* soft-close window or to disable active closing (close-spread-time
* option set to 0).
*/
if (h1s->flags & H1S_F_WANT_KAL && (fe->flags & (PR_FL_DISABLED|PR_FL_STOPPED))) {
int want_clo = 1;
/* If a close-spread-time option is set, we want to avoid
* closing all the active HTTP connections at once so we add a
* random factor that will spread the closing.
*/
if (tick_isset(global.close_spread_end)) {
int remaining_window = tick_remain(now_ms, global.close_spread_end);
if (remaining_window) {
/* This should increase the closing rate the further along
* the window we are.
*/
want_clo = (remaining_window <= statistical_prng_range(global.close_spread_time));
}
}
else if (global.tune.options & GTUNE_DISABLE_ACTIVE_CLOSE)
want_clo = 0;
if (want_clo) {
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("stopping, set close mode", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
}
}
/* Deduce the connection mode of the client connection, depending on the
* configuration and the H1 message flags. This function is called twice, the
* first time when the request is parsed and the second time when the response
* is parsed.
*/
static void h1_set_srv_conn_mode(struct h1s *h1s, struct h1m *h1m)
{
struct session *sess = h1s->sess;
struct proxy *be = h1s->h1c->px;
int fe_flags = sess ? sess->fe->options : 0;
if (h1m->flags & H1_MF_RESP) {
/* Input direction: second pass */
if ((h1s->meth == HTTP_METH_CONNECT && h1s->status >= 200 && h1s->status < 300) ||
h1s->status == 101) {
/* Either we've established an explicit tunnel, or we're
* switching the protocol. In both cases, we're very unlikely to
* understand the next protocols. We have to switch to tunnel
* mode, so that we transfer the request and responses then let
* this protocol pass unmodified. When we later implement
* specific parsers for such protocols, we'll want to check the
* Upgrade header which contains information about that protocol
* for responses with status 101 (eg: see RFC2817 about TLS).
*/
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_TUN;
TRACE_STATE("set tunnel mode (resp)", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s);
}
else if (h1s->flags & H1S_F_WANT_KAL) {
/* By default the server is in KAL mode. CLOSE mode mean
* it is imposed by haproxy itself. So only change KAL
* mode here. */
if (!(h1m->flags & H1_MF_XFER_LEN) || h1m->flags & H1_MF_CONN_CLO ||
!(h1m->flags & (H1_MF_VER_11|H1_MF_CONN_KAL))){
/* no length known or explicit close or no explicit keep-alive in HTTP/1.0 => close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("detect close mode (resp)", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s);
}
}
}
else {
/* Output direction: first pass */
if (h1m->flags & H1_MF_CONN_CLO) {
/* explicit close => close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("detect close mode (req)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
else if (!(h1m->flags & H1_MF_CONN_KAL) &&
((fe_flags & PR_O_HTTP_MODE) == PR_O_HTTP_SCL ||
(be->options & PR_O_HTTP_MODE) == PR_O_HTTP_SCL ||
(be->options & PR_O_HTTP_MODE) == PR_O_HTTP_CLO)) {
/* no explicit keep-alive option httpclose/server-close => close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("force close mode (req)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
}
/* If KAL, check if the backend is stopping. If yes, switch in CLO mode */
if (h1s->flags & H1S_F_WANT_KAL && (be->flags & (PR_FL_DISABLED|PR_FL_STOPPED))) {
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("stopping, set close mode", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
}
static void h1_update_req_conn_value(struct h1s *h1s, struct h1m *h1m, struct ist *conn_val)
{
struct proxy *px = h1s->h1c->px;
/* Don't update "Connection:" header in TUNNEL mode or if "Upgrage"
* token is found
*/
if (h1s->flags & H1S_F_WANT_TUN || h1m->flags & H1_MF_CONN_UPG)
return;
if (h1s->flags & H1S_F_WANT_KAL || px->options2 & PR_O2_FAKE_KA) {
if (!(h1m->flags & H1_MF_VER_11)) {
TRACE_STATE("add \"Connection: keep-alive\"", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
*conn_val = ist("keep-alive");
}
}
else { /* H1S_F_WANT_CLO && !PR_O2_FAKE_KA */
if (h1m->flags & H1_MF_VER_11) {
TRACE_STATE("add \"Connection: close\"", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
*conn_val = ist("close");
}
}
}
static void h1_update_res_conn_value(struct h1s *h1s, struct h1m *h1m, struct ist *conn_val)
{
/* Don't update "Connection:" header in TUNNEL mode or if "Upgrage"
* token is found
*/
if (h1s->flags & H1S_F_WANT_TUN || h1m->flags & H1_MF_CONN_UPG)
return;
if (h1s->flags & H1S_F_WANT_KAL) {
if (!(h1m->flags & H1_MF_VER_11) ||
!((h1m->flags & h1s->req.flags) & H1_MF_VER_11)) {
TRACE_STATE("add \"Connection: keep-alive\"", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
*conn_val = ist("keep-alive");
}
}
else { /* H1S_F_WANT_CLO */
if (h1m->flags & H1_MF_VER_11) {
TRACE_STATE("add \"Connection: close\"", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
*conn_val = ist("close");
}
}
}
static void h1_process_input_conn_mode(struct h1s *h1s, struct h1m *h1m, struct htx *htx)
{
if (!(h1s->h1c->flags & H1C_F_IS_BACK))
h1_set_cli_conn_mode(h1s, h1m);
else
h1_set_srv_conn_mode(h1s, h1m);
}
static void h1_process_output_conn_mode(struct h1s *h1s, struct h1m *h1m, struct ist *conn_val)
{
if (!(h1s->h1c->flags & H1C_F_IS_BACK))
h1_set_cli_conn_mode(h1s, h1m);
else
h1_set_srv_conn_mode(h1s, h1m);
if (!(h1m->flags & H1_MF_RESP))
h1_update_req_conn_value(h1s, h1m, conn_val);
else
h1_update_res_conn_value(h1s, h1m, conn_val);
}
/* Try to adjust the case of the message header name using the global map
* <hdrs_map>.
*/
static void h1_adjust_case_outgoing_hdr(struct h1s *h1s, struct h1m *h1m, struct ist *name)
{
struct ebpt_node *node;
struct h1_hdr_entry *entry;
/* No entry in the map, do nothing */
if (eb_is_empty(&hdrs_map.map))
return;
/* No conversion for the request headers */
if (!(h1m->flags & H1_MF_RESP) && !(h1s->h1c->px->options2 & PR_O2_H1_ADJ_BUGSRV))
return;
/* No conversion for the response headers */
if ((h1m->flags & H1_MF_RESP) && !(h1s->h1c->px->options2 & PR_O2_H1_ADJ_BUGCLI))
return;
node = ebis_lookup_len(&hdrs_map.map, name->ptr, name->len);
if (!node)
return;
entry = container_of(node, struct h1_hdr_entry, node);
name->ptr = entry->name.ptr;
name->len = entry->name.len;
}
/* Append the description of what is present in error snapshot <es> into <out>.
* The description must be small enough to always fit in a buffer. The output
* buffer may be the trash so the trash must not be used inside this function.
*/
static void h1_show_error_snapshot(struct buffer *out, const struct error_snapshot *es)
{
chunk_appendf(out,
" H1 connection flags 0x%08x, H1 stream flags 0x%08x\n"
" H1 msg state %s(%d), H1 msg flags 0x%08x\n"
" H1 chunk len %lld bytes, H1 body len %lld bytes :\n",
es->ctx.h1.c_flags, es->ctx.h1.s_flags,
h1m_state_str(es->ctx.h1.state), es->ctx.h1.state,
es->ctx.h1.m_flags, es->ctx.h1.m_clen, es->ctx.h1.m_blen);
}
/*
* Capture a bad request or response and archive it in the proxy's structure.
* By default it tries to report the error position as h1m->err_pos. However if
* this one is not set, it will then report h1m->next, which is the last known
* parsing point. The function is able to deal with wrapping buffers. It always
* displays buffers as a contiguous area starting at buf->p. The direction is
* determined thanks to the h1m's flags.
*/
static void h1_capture_bad_message(struct h1c *h1c, struct h1s *h1s,
struct h1m *h1m, struct buffer *buf)
{
struct session *sess = h1s->sess;
struct proxy *proxy = h1c->px;
struct proxy *other_end;
union error_snapshot_ctx ctx;
if (h1c->state == H1_CS_UPGRADING || h1c->state == H1_CS_RUNNING) {
if (sess == NULL)
sess = __sc_strm(h1s_sc(h1s))->sess;
if (!(h1m->flags & H1_MF_RESP))
other_end = __sc_strm(h1s_sc(h1s))->be;
else
other_end = sess->fe;
} else
other_end = NULL;
/* http-specific part now */
ctx.h1.state = h1m->state;
ctx.h1.c_flags = h1c->flags;
ctx.h1.s_flags = h1s->flags;
ctx.h1.m_flags = h1m->flags;
ctx.h1.m_clen = h1m->curr_len;
ctx.h1.m_blen = h1m->body_len;
proxy_capture_error(proxy, !!(h1m->flags & H1_MF_RESP), other_end,
h1c->conn->target, sess, buf, 0, 0,
(h1m->err_pos >= 0) ? h1m->err_pos : h1m->next,
&ctx, h1_show_error_snapshot);
}
/* Emit the chunk size <chksz> followed by a CRLF in front of data of the buffer
* <buf>. It goes backwards and starts with the byte before the buffer's
* head. The caller is responsible for ensuring there is enough room left before
* the buffer's head for the string. if <length> is greater than 0, it
* represents the expected total length of the chunk size, including the
* CRLF. So it will be padded with 0 to resepct this length. It is the caller
* responsibility to pass the right value. if <length> is set to 0 (or less that
* the smallest size to represent the chunk size), it is ignored.
*/
static void h1_prepend_chunk_size(struct buffer *buf, size_t chksz, size_t length)
{
char *beg, *end;
beg = end = b_head(buf);
*--beg = '\n';
*--beg = '\r';
if (length)
length -= 2;
do {
*--beg = hextab[chksz & 0xF];
if (length)
--length;
} while (chksz >>= 4);
while (length) {
*--beg = '0';
--length;
}
buf->head -= (end - beg);
b_add(buf, end - beg);
}
/* Emit the chunksize followed by a CRLF after the data of the buffer
* <buf>. Returns 0 on error.
*/
static int h1_append_chunk_size(struct buffer *buf, size_t chksz)
{
char tmp[10];
char *beg, *end;
beg = end = tmp+10;
*--beg = '\n';
*--beg = '\r';
do {
*--beg = hextab[chksz & 0xF];
} while (chksz >>= 4);
return chunk_memcat(buf, beg, end - beg);
}
/* Emit a CRLF in front of data of the buffer <buf>. It goes backwards and
* starts with the byte before the buffer's head. The caller is responsible for
* ensuring there is enough room left before the buffer's head for the string.
*/
static void h1_prepend_chunk_crlf(struct buffer *buf)
{
char *head;
head = b_head(buf);
*--head = '\n';
*--head = '\r';
buf->head -= 2;
b_add(buf, 2);
}
/* Emit a CRLF after the data of the buffer <buf>. The caller is responsible for
* ensuring there is enough room left in the buffer for the string. */
static void h1_append_chunk_crlf(struct buffer *buf)
{
*(b_peek(buf, b_data(buf))) = '\r';
*(b_peek(buf, b_data(buf) + 1)) = '\n';
b_add(buf, 2);
}
/*
* Switch the stream to tunnel mode. This function must only be called on 2xx
* (successful) replies to CONNECT requests or on 101 (switching protocol).
*/
static void h1_set_tunnel_mode(struct h1s *h1s)
{
struct h1c *h1c = h1s->h1c;
h1s->req.state = H1_MSG_TUNNEL;
h1s->req.flags &= ~(H1_MF_XFER_LEN|H1_MF_CLEN|H1_MF_CHNK);
h1s->res.state = H1_MSG_TUNNEL;
h1s->res.flags &= ~(H1_MF_XFER_LEN|H1_MF_CLEN|H1_MF_CHNK);
TRACE_STATE("switch H1 stream in tunnel mode", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
if (h1s->flags & H1S_F_RX_BLK) {
h1s->flags &= ~H1S_F_RX_BLK;
h1_wake_stream_for_recv(h1s);
TRACE_STATE("Re-enable input processing", H1_EV_RX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1s);
}
if (h1s->flags & H1S_F_TX_BLK) {
h1s->flags &= ~H1S_F_TX_BLK;
h1_wake_stream_for_send(h1s);
TRACE_STATE("Re-enable output processing", H1_EV_TX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1s);
}
}
/* Search for a websocket key header. The message should have been identified
* as a valid websocket handshake.
*
* On the request side, if found the key is stored in the session. It might be
* needed to calculate response key if the server side is using http/2.
*
* On the response side, the key might be verified if haproxy has been
* responsible for the generation of a key. This happens when a h2 client is
* interfaced with a h1 server.
*
* Returns 0 if no key found or invalid key
*/
static int h1_search_websocket_key(struct h1s *h1s, struct h1m *h1m, struct htx *htx)
{
struct htx_blk *blk;
enum htx_blk_type type;
struct ist n, v;
int ws_key_found = 0, idx;
idx = htx_get_head(htx); // returns the SL that we skip
while ((idx = htx_get_next(htx, idx)) != -1) {
blk = htx_get_blk(htx, idx);
type = htx_get_blk_type(blk);
if (type == HTX_BLK_UNUSED)
continue;
if (type != HTX_BLK_HDR)
break;
n = htx_get_blk_name(htx, blk);
v = htx_get_blk_value(htx, blk);
/* Websocket key is base64 encoded of 16 bytes */
if (isteqi(n, ist("sec-websocket-key")) && v.len == 24 &&
!(h1m->flags & H1_MF_RESP)) {
/* Copy the key on request side
* we might need it if the server is using h2 and does
* not provide the response
*/
memcpy(h1s->ws_key, v.ptr, 24);
ws_key_found = 1;
break;
}
else if (isteqi(n, ist("sec-websocket-accept")) &&
h1m->flags & H1_MF_RESP) {
/* Need to verify the response key if the input was
* generated by haproxy
*/
if (h1s->ws_key[0]) {
char key[29];
h1_calculate_ws_output_key(h1s->ws_key, key);
if (!isteqi(ist(key), v))
break;
}
ws_key_found = 1;
break;
}
}
/* missing websocket key, reject the message */
if (!ws_key_found) {
htx->flags |= HTX_FL_PARSING_ERROR;
return 0;
}
return 1;
}
/*
* Parse HTTP/1 headers. It returns the number of bytes parsed if > 0, or 0 if
* it couldn't proceed. Parsing errors are reported by setting H1S_F_*_ERROR
* flag. If more room is requested, H1S_F_RX_CONGESTED flag is set. If relies on
* the function http_parse_msg_hdrs() to do the parsing.
*/
static size_t h1_handle_headers(struct h1s *h1s, struct h1m *h1m, struct htx *htx,
struct buffer *buf, size_t *ofs, size_t max)
{
union h1_sl h1sl;
int ret = 0;
TRACE_ENTER(H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s, 0, (size_t[]){max});
if (h1s->meth == HTTP_METH_CONNECT)
h1m->flags |= H1_MF_METH_CONNECT;
if (h1s->meth == HTTP_METH_HEAD)
h1m->flags |= H1_MF_METH_HEAD;
ret = h1_parse_msg_hdrs(h1m, &h1sl, htx, buf, *ofs, max);
if (ret <= 0) {
TRACE_DEVEL("leaving on missing data or error", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s);
if (ret == -1) {
h1s->flags |= H1S_F_PARSING_ERROR;
TRACE_ERROR("parsing error, reject H1 message", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_H1S_ERR, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
}
else if (ret == -2) {
TRACE_STATE("RX path congested, waiting for more space", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_H1S_BLK, h1s->h1c->conn, h1s);
h1s->flags |= H1S_F_RX_CONGESTED;
}
ret = 0;
goto end;
}
/* Reject HTTP/1.0 GET/HEAD/DELETE requests with a payload except if
* accept_payload_with_any_method global option is set.
*There is a payload if the c-l is not null or the the payload is
* chunk-encoded. A parsing error is reported but a A
* 413-Payload-Too-Large is returned instead of a 400-Bad-Request.
*/
if (!accept_payload_with_any_method &&
!(h1m->flags & (H1_MF_RESP|H1_MF_VER_11)) &&
(((h1m->flags & H1_MF_CLEN) && h1m->body_len) || (h1m->flags & H1_MF_CHNK)) &&
(h1sl.rq.meth == HTTP_METH_GET || h1sl.rq.meth == HTTP_METH_HEAD || h1sl.rq.meth == HTTP_METH_DELETE)) {
h1s->flags |= H1S_F_PARSING_ERROR;
htx->flags |= HTX_FL_PARSING_ERROR;
h1s->h1c->errcode = 413;
TRACE_ERROR("HTTP/1.0 GET/HEAD/DELETE request with a payload forbidden", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_H1S_ERR, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
ret = 0;
goto end;
}
/* Reject any message with an unknown transfer-encoding. In fact if any
* encoding other than "chunked". A 422-Unprocessable-Content is
* returned for an invalid request, a 502-Bad-Gateway for an invalid
* response.
*/
if (h1m->flags & H1_MF_TE_OTHER) {
h1s->flags |= H1S_F_PARSING_ERROR;
htx->flags |= HTX_FL_PARSING_ERROR;
if (!(h1m->flags & H1_MF_RESP))
h1s->h1c->errcode = 422;
TRACE_ERROR("Unknown transfer-encoding", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_H1S_ERR, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
ret = 0;
goto end;
}
/* If websocket handshake, search for the websocket key */
if ((h1m->flags & (H1_MF_CONN_UPG|H1_MF_UPG_WEBSOCKET)) ==
(H1_MF_CONN_UPG|H1_MF_UPG_WEBSOCKET)) {
int ws_ret = h1_search_websocket_key(h1s, h1m, htx);
if (!ws_ret) {
h1s->flags |= H1S_F_PARSING_ERROR;
TRACE_ERROR("missing/invalid websocket key, reject H1 message", H1_EV_RX_DATA|H1_EV_RX_HDRS|H1_EV_H1S_ERR, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
ret = 0;
goto end;
}
}
if (h1m->err_pos >= 0) {
/* Maybe we found an error during the parsing while we were
* configured not to block on that, so we have to capture it
* now.
*/
TRACE_STATE("Ignored parsing error", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
}
if (!(h1m->flags & H1_MF_RESP)) {
h1s->meth = h1sl.rq.meth;
if (h1s->meth == HTTP_METH_HEAD)
h1s->flags |= H1S_F_BODYLESS_RESP;
}
else {
h1s->status = h1sl.st.status;
if (h1s->status == 204 || h1s->status == 304)
h1s->flags |= H1S_F_BODYLESS_RESP;
}
h1_process_input_conn_mode(h1s, h1m, htx);
*ofs += ret;
end:
TRACE_LEAVE(H1_EV_RX_DATA|H1_EV_RX_HDRS, h1s->h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
/*
* Parse HTTP/1 body. It returns the number of bytes parsed if > 0, or 0 if it
* couldn't proceed. Parsing errors are reported by setting H1S_F_*_ERROR flag.
* If relies on the function http_parse_msg_data() to do the parsing.
*/
static size_t h1_handle_data(struct h1s *h1s, struct h1m *h1m, struct htx **htx,
struct buffer *buf, size_t *ofs, size_t max,
struct buffer *htxbuf)
{
size_t ret;
TRACE_ENTER(H1_EV_RX_DATA|H1_EV_RX_BODY, h1s->h1c->conn, h1s, 0, (size_t[]){max});
ret = h1_parse_msg_data(h1m, htx, buf, *ofs, max, htxbuf);
if (!ret) {
TRACE_DEVEL("leaving on missing data or error", H1_EV_RX_DATA|H1_EV_RX_BODY, h1s->h1c->conn, h1s);
if ((*htx)->flags & HTX_FL_PARSING_ERROR) {
h1s->flags |= H1S_F_PARSING_ERROR;
TRACE_ERROR("parsing error, reject H1 message", H1_EV_RX_DATA|H1_EV_RX_BODY|H1_EV_H1S_ERR, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
}
goto end;
}
*ofs += ret;
end:
if (b_data(buf) != *ofs && (h1m->state == H1_MSG_DATA || h1m->state == H1_MSG_TUNNEL)) {
TRACE_STATE("RX path congested, waiting for more space", H1_EV_RX_DATA|H1_EV_RX_BODY|H1_EV_H1S_BLK, h1s->h1c->conn, h1s);
h1s->flags |= H1S_F_RX_CONGESTED;
}
TRACE_LEAVE(H1_EV_RX_DATA|H1_EV_RX_BODY, h1s->h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
/*
* Parse HTTP/1 trailers. It returns the number of bytes parsed if > 0, or 0 if
* it couldn't proceed. Parsing errors are reported by setting H1S_F_*_ERROR
* flag and filling h1s->err_pos and h1s->err_state fields. This functions is
* responsible to update the parser state <h1m>. If more room is requested,
* H1S_F_RX_CONGESTED flag is set.
*/
static size_t h1_handle_trailers(struct h1s *h1s, struct h1m *h1m, struct htx *htx,
struct buffer *buf, size_t *ofs, size_t max)
{
int ret;
TRACE_ENTER(H1_EV_RX_DATA|H1_EV_RX_TLRS, h1s->h1c->conn, h1s, 0, (size_t[]){max});
ret = h1_parse_msg_tlrs(h1m, htx, buf, *ofs, max);
if (ret <= 0) {
TRACE_DEVEL("leaving on missing data or error", H1_EV_RX_DATA|H1_EV_RX_BODY, h1s->h1c->conn, h1s);
if (ret == -1) {
h1s->flags |= H1S_F_PARSING_ERROR;
TRACE_ERROR("parsing error, reject H1 message", H1_EV_RX_DATA|H1_EV_RX_TLRS|H1_EV_H1S_ERR, h1s->h1c->conn, h1s);
h1_capture_bad_message(h1s->h1c, h1s, h1m, buf);
}
else if (ret == -2) {
TRACE_STATE("RX path congested, waiting for more space", H1_EV_RX_DATA|H1_EV_RX_TLRS|H1_EV_H1S_BLK, h1s->h1c->conn, h1s);
h1s->flags |= H1S_F_RX_CONGESTED;
}
ret = 0;
goto end;
}
*ofs += ret;
end:
TRACE_LEAVE(H1_EV_RX_DATA|H1_EV_RX_TLRS, h1s->h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
/*
* Process incoming data. It parses data and transfer them from h1c->ibuf into
* <buf>. It returns the number of bytes parsed and transferred if > 0, or 0 if
* it couldn't proceed.
*
* WARNING: H1S_F_RX_CONGESTED flag must be removed before processing input data.
*/
static size_t h1_process_demux(struct h1c *h1c, struct buffer *buf, size_t count)
{
struct h1s *h1s = h1c->h1s;
struct h1m *h1m;
struct htx *htx;
size_t data;
size_t ret = 0;
size_t total = 0;
htx = htx_from_buf(buf);
TRACE_ENTER(H1_EV_RX_DATA, h1c->conn, h1s, htx, (size_t[]){count});
h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->req : &h1s->res);
data = htx->data;
if (h1s->flags & (H1S_F_INTERNAL_ERROR|H1S_F_PARSING_ERROR|H1S_F_NOT_IMPL_ERROR))
goto end;
if (h1s->flags & H1S_F_RX_BLK)
goto out;
/* Always remove congestion flags and try to process more input data */
h1s->flags &= ~H1S_F_RX_CONGESTED;
do {
size_t used = htx_used_space(htx);
if (h1m->state <= H1_MSG_LAST_LF) {
TRACE_PROTO("parsing message headers", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1c->conn, h1s);
ret = h1_handle_headers(h1s, h1m, htx, &h1c->ibuf, &total, count);
if (!ret)
break;
TRACE_USER((!(h1m->flags & H1_MF_RESP) ? "rcvd H1 request headers" : "rcvd H1 response headers"),
H1_EV_RX_DATA|H1_EV_RX_HDRS, h1c->conn, h1s, htx, (size_t[]){ret});
if ((h1m->flags & H1_MF_RESP) &&
h1s->status < 200 && (h1s->status == 100 || h1s->status >= 102)) {
h1m_init_res(&h1s->res);
h1m->flags |= (H1_MF_NO_PHDR|H1_MF_CLEAN_CONN_HDR);
TRACE_STATE("1xx response rcvd", H1_EV_RX_DATA|H1_EV_RX_HDRS, h1c->conn, h1s);
}
}
else if (h1m->state < H1_MSG_TRAILERS) {
TRACE_PROTO("parsing message payload", H1_EV_RX_DATA|H1_EV_RX_BODY, h1c->conn, h1s);
ret = h1_handle_data(h1s, h1m, &htx, &h1c->ibuf, &total, count, buf);
if (h1m->state < H1_MSG_TRAILERS)
break;
TRACE_PROTO((!(h1m->flags & H1_MF_RESP) ? "rcvd H1 request payload data" : "rcvd H1 response payload data"),
H1_EV_RX_DATA|H1_EV_RX_BODY, h1c->conn, h1s, htx, (size_t[]){ret});
}
else if (h1m->state == H1_MSG_TRAILERS) {
TRACE_PROTO("parsing message trailers", H1_EV_RX_DATA|H1_EV_RX_TLRS, h1c->conn, h1s);
ret = h1_handle_trailers(h1s, h1m, htx, &h1c->ibuf, &total, count);
if (h1m->state != H1_MSG_DONE)
break;
TRACE_PROTO((!(h1m->flags & H1_MF_RESP) ? "rcvd H1 request trailers" : "rcvd H1 response trailers"),
H1_EV_RX_DATA|H1_EV_RX_TLRS, h1c->conn, h1s, htx, (size_t[]){ret});
}
else if (h1m->state == H1_MSG_DONE) {
TRACE_USER((!(h1m->flags & H1_MF_RESP) ? "H1 request fully rcvd" : "H1 response fully rcvd"),
H1_EV_RX_DATA|H1_EV_RX_EOI, h1c->conn, h1s, htx);
if (!(h1c->flags & H1C_F_IS_BACK)) {
/* The request was fully received. It means the H1S now
* expect data from the opposite side
*/
se_expect_data(h1s->sd);
}
if ((h1m->flags & H1_MF_RESP) &&
((h1s->meth == HTTP_METH_CONNECT && h1s->status >= 200 && h1s->status < 300) || h1s->status == 101))
h1_set_tunnel_mode(h1s);
else {
if (h1s->req.state < H1_MSG_DONE || h1s->res.state < H1_MSG_DONE) {
/* Unfinished transaction: block this input side waiting the end of the output side */
h1s->flags |= H1S_F_RX_BLK;
TRACE_STATE("Disable input processing", H1_EV_RX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
}
if (h1s->flags & H1S_F_TX_BLK) {
h1s->flags &= ~H1S_F_TX_BLK;
h1_wake_stream_for_send(h1s);
TRACE_STATE("Re-enable output processing", H1_EV_TX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1s);
}
break;
}
}
else if (h1m->state == H1_MSG_TUNNEL) {
TRACE_PROTO("parsing tunneled data", H1_EV_RX_DATA, h1c->conn, h1s);
ret = h1_handle_data(h1s, h1m, &htx, &h1c->ibuf, &total, count, buf);
if (!ret)
break;
TRACE_PROTO((!(h1m->flags & H1_MF_RESP) ? "rcvd H1 request tunneled data" : "rcvd H1 response tunneled data"),
H1_EV_RX_DATA|H1_EV_RX_EOI, h1c->conn, h1s, htx, (size_t[]){ret});
}
else {
h1s->flags |= H1S_F_PARSING_ERROR;
break;
}
count -= htx_used_space(htx) - used;
} while (!(h1s->flags & (H1S_F_PARSING_ERROR|H1S_F_NOT_IMPL_ERROR|H1S_F_RX_BLK|H1S_F_RX_CONGESTED)));
if (h1s->flags & (H1S_F_PARSING_ERROR|H1S_F_NOT_IMPL_ERROR)) {
TRACE_ERROR("parsing or not-implemented error", H1_EV_RX_DATA|H1_EV_H1S_ERR, h1c->conn, h1s);
goto err;
}
b_del(&h1c->ibuf, total);
TRACE_DEVEL("incoming data parsed", H1_EV_RX_DATA, h1c->conn, h1s, htx, (size_t[]){ret});
ret = htx->data - data;
if ((h1c->flags & H1C_F_IN_FULL) && buf_room_for_htx_data(&h1c->ibuf)) {
h1c->flags &= ~H1C_F_IN_FULL;
TRACE_STATE("h1c ibuf not full anymore", H1_EV_RX_DATA|H1_EV_H1C_BLK|H1_EV_H1C_WAKE, h1c->conn, h1s);
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
if (!b_data(&h1c->ibuf))
h1_release_buf(h1c, &h1c->ibuf);
if (h1m->state <= H1_MSG_LAST_LF)
goto out;
if (h1c->state < H1_CS_RUNNING) {
/* The H1 connection is not ready. Most of time, there is no SC
* attached, except for TCP>H1 upgrade, from a TCP frontend. In both
* cases, it is only possible on the client side.
*/
BUG_ON(h1c->flags & H1C_F_IS_BACK);
if (h1c->state == H1_CS_EMBRYONIC) {
TRACE_DEVEL("request headers fully parsed, create and attach the SC", H1_EV_RX_DATA, h1c->conn, h1s);
BUG_ON(h1s_sc(h1s));
if (!h1s_new_sc(h1s, buf)) {
h1s->flags |= H1S_F_INTERNAL_ERROR;
goto err;
}
}
else {
TRACE_DEVEL("request headers fully parsed, upgrade the inherited SC", H1_EV_RX_DATA, h1c->conn, h1s);
BUG_ON(h1s_sc(h1s) == NULL);
if (!h1s_upgrade_sc(h1s, buf)) {
h1s->flags |= H1S_F_INTERNAL_ERROR;
TRACE_ERROR("H1S upgrade failure", H1_EV_RX_DATA|H1_EV_H1S_ERR, h1c->conn, h1s);
goto err;
}
}
}
/* Here h1s_sc(h1s) is always defined */
if (!(h1c->flags & H1C_F_CANT_FASTFWD) &&
(!(h1m->flags & H1_MF_RESP) || !(h1s->flags & H1S_F_BODYLESS_RESP)) &&
(h1m->state == H1_MSG_DATA || h1m->state == H1_MSG_TUNNEL) &&
!(global.tune.no_zero_copy_fwd & NO_ZERO_COPY_FWD_H1_RCV)) {
TRACE_STATE("notify the mux can use fast-forward", H1_EV_RX_DATA|H1_EV_RX_BODY, h1c->conn, h1s);
se_fl_set(h1s->sd, SE_FL_MAY_FASTFWD_PROD);
}
else {
TRACE_STATE("notify the mux can't use fast-forward anymore", H1_EV_RX_DATA|H1_EV_RX_BODY, h1c->conn, h1s);
se_fl_clr(h1s->sd, SE_FL_MAY_FASTFWD_PROD);
h1c->flags &= ~H1C_F_WANT_FASTFWD;
}
/* Set EOI on stream connector in DONE state iff:
* - it is a response
* - it is a request but no a protocol upgrade nor a CONNECT
*
* If not set, Wait the response to do so or not depending on the status
* code.
*/
if (((h1m->state == H1_MSG_DONE) && (h1m->flags & H1_MF_RESP)) ||
((h1m->state == H1_MSG_DONE) && (h1s->meth != HTTP_METH_CONNECT) && !(h1m->flags & H1_MF_CONN_UPG)))
se_fl_set(h1s->sd, SE_FL_EOI);
out:
/* When Input data are pending for this message, notify upper layer that
* the mux need more space in the HTX buffer to continue if :
*
* - The parser is blocked in MSG_DATA or MSG_TUNNEL state
* - Headers or trailers are pending to be copied.
*/
if (h1s->flags & (H1S_F_RX_CONGESTED)) {
se_fl_set(h1s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
TRACE_STATE("waiting for more room", H1_EV_RX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
}
else {
se_fl_clr(h1s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
if (h1c->flags & H1C_F_EOS) {
se_fl_set(h1s->sd, SE_FL_EOS);
TRACE_STATE("report EOS to SE", H1_EV_RX_DATA, h1c->conn, h1s);
if (h1m->state >= H1_MSG_DONE || (h1m->state > H1_MSG_LAST_LF && !(h1m->flags & H1_MF_XFER_LEN))) {
/* DONE or TUNNEL or SHUTR without XFER_LEN, set
* EOI on the stream connector */
se_fl_set(h1s->sd, SE_FL_EOI);
TRACE_STATE("report EOI to SE", H1_EV_RX_DATA, h1c->conn, h1s);
}
else if (h1m->state < H1_MSG_DONE) {
if (h1m->state <= H1_MSG_LAST_LF && b_data(&h1c->ibuf))
htx->flags |= HTX_FL_PARSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("message aborted, set error on SC", H1_EV_RX_DATA|H1_EV_H1S_ERR, h1c->conn, h1s);
}
if (h1s->flags & H1S_F_TX_BLK) {
h1s->flags &= ~H1S_F_TX_BLK;
h1_wake_stream_for_send(h1s);
TRACE_STATE("Re-enable output processing", H1_EV_TX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1s);
}
}
if (h1c->flags & H1C_F_ERROR) {
/* Report a terminal error to the SE if a previous read error was detected */
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_STATE("report ERROR to SE", H1_EV_RX_DATA|H1_EV_H1S_ERR, h1c->conn, h1s);
}
}
end:
htx_to_buf(htx, buf);
TRACE_LEAVE(H1_EV_RX_DATA, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
err:
htx_to_buf(htx, buf);
se_fl_set(h1s->sd, SE_FL_EOI);
if (h1c->state < H1_CS_RUNNING) {
h1c->flags |= H1C_F_EOS;
se_fl_set(h1s->sd, SE_FL_EOS);
}
TRACE_DEVEL("leaving on error", H1_EV_RX_DATA|H1_EV_STRM_ERR, h1c->conn, h1s);
return 0;
}
/* Try to send the request line from the HTX message <htx> for the stream
* <h1s>. It returns the number of bytes consumed or zero if nothing was done or
* if an error occurred. No more than <count> bytes can be sent.
*/
static size_t h1_make_reqline(struct h1s *h1s, struct h1m *h1m, struct htx *htx, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx_blk *blk;
struct htx_sl *sl;
enum htx_blk_type type;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){count});
while (1) {
blk = htx_get_head_blk(htx);
if (!blk)
goto end;
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
if (type == HTX_BLK_UNUSED)
continue;
if (type != HTX_BLK_REQ_SL || sz > count)
goto error;
break;
}
TRACE_USER("sending request headers", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx);
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
sl = htx_get_blk_ptr(htx, blk);
if (!h1_format_htx_reqline(sl, &h1c->obuf))
goto full;
h1s->meth = sl->info.req.meth;
h1_parse_req_vsn(h1m, sl);
h1m->flags |= H1_MF_XFER_LEN;
if (sl->flags & HTX_SL_F_CHNK)
h1m->flags |= H1_MF_CHNK;
else if (sl->flags & HTX_SL_F_CLEN)
h1m->flags |= H1_MF_CLEN;
if (sl->flags & HTX_SL_F_XFER_ENC)
h1m->flags |= H1_MF_XFER_ENC;
if (sl->flags & HTX_SL_F_BODYLESS && !(h1m->flags & H1_MF_CLEN)) {
h1m->flags = (h1m->flags & ~H1_MF_CHNK) | H1_MF_CLEN;
h1s->flags |= H1S_F_HAVE_CLEN;
}
if ((sl->flags & HTX_SL_F_BODYLESS_RESP) || h1s->meth == HTTP_METH_HEAD)
h1s->flags |= H1S_F_BODYLESS_RESP;
if (h1s->flags & H1S_F_RX_BLK) {
h1s->flags &= ~H1S_F_RX_BLK;
h1_wake_stream_for_recv(h1s);
TRACE_STATE("Re-enable input processing", H1_EV_TX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1s);
}
h1m->state = H1_MSG_HDR_NAME;
ret += sz;
htx_remove_blk(htx, blk);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto end;
error:
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on request start-line",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Try to send the status line from the HTX message <htx> for the stream
* <h1s>. It returns the number of bytes consumed or zero if nothing was done or
* if an error occurred. No more than <count> bytes can be sent.
*/
static size_t h1_make_stline(struct h1s *h1s, struct h1m *h1m, struct htx *htx, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx_blk *blk;
struct htx_sl *sl;
enum htx_blk_type type;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){count});
while (1) {
blk = htx_get_head_blk(htx);
if (!blk)
goto end;
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
if (type == HTX_BLK_UNUSED)
continue;
if (type != HTX_BLK_RES_SL || sz > count)
goto error;
break;
}
TRACE_USER("sending response headers", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx);
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
sl = htx_get_blk_ptr(htx, blk);
if (!h1_format_htx_stline(sl, &h1c->obuf))
goto full;
h1s->status = sl->info.res.status;
h1_parse_res_vsn(h1m, sl);
if (sl->flags & HTX_SL_F_XFER_LEN) {
h1m->flags |= H1_MF_XFER_LEN;
if (sl->flags & HTX_SL_F_CHNK)
h1m->flags |= H1_MF_CHNK;
else if (sl->flags & HTX_SL_F_CLEN)
h1m->flags |= H1_MF_CLEN;
if (sl->flags & HTX_SL_F_XFER_ENC)
h1m->flags |= H1_MF_XFER_ENC;
}
if (h1s->status < 200)
h1s->flags |= H1S_F_HAVE_O_CONN;
else if ((sl->flags & HTX_SL_F_BODYLESS_RESP) || h1s->status == 204 || h1s->status == 304)
h1s->flags |= H1S_F_BODYLESS_RESP;
h1m->state = H1_MSG_HDR_NAME;
ret += sz;
htx_remove_blk(htx, blk);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto end;
error:
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on response start-line",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Try to send the message headers from the HTX message <htx> for the stream
* <h1s>. It returns the number of bytes consumed or zero if nothing was done or
* if an error occurred. No more than <count> bytes can be sent.
*/
static size_t h1_make_headers(struct h1s *h1s, struct h1m *h1m, struct htx *htx, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx_blk *blk;
struct buffer outbuf;
enum htx_blk_type type;
struct ist n, v;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){count});
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
outbuf = b_make(b_tail(&h1c->obuf), b_contig_space(&h1c->obuf), 0, 0);
blk = htx_get_head_blk(htx);
while (blk) {
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
if (type == HTX_BLK_HDR) {
if (sz > count)
goto error;
n = htx_get_blk_name(htx, blk);
v = htx_get_blk_value(htx, blk);
/* Skip all pseudo-headers */
if (*(n.ptr) == ':')
goto nextblk;
if (isteq(n, ist("transfer-encoding"))) {
if ((h1m->flags & H1_MF_RESP) && (h1s->status < 200 || h1s->status == 204))
goto nextblk;
if (!(h1m->flags & H1_MF_CHNK))
goto nextblk;
if (h1_parse_xfer_enc_header(h1m, v) < 0)
goto error;
h1s->flags |= H1S_F_HAVE_CHNK;
}
else if (isteq(n, ist("content-length"))) {
if ((h1m->flags & H1_MF_RESP) && (h1s->status < 200 || h1s->status == 204))
goto nextblk;
if (!(h1m->flags & H1_MF_CLEN))
goto nextblk;
if (!(h1s->flags & H1S_F_HAVE_CLEN))
h1m->flags &= ~H1_MF_CLEN;
/* Only skip C-L header with invalid value. */
if (h1_parse_cont_len_header(h1m, &v) < 0)
goto error;
if (h1s->flags & H1S_F_HAVE_CLEN)
goto nextblk;
h1s->flags |= H1S_F_HAVE_CLEN;
}
else if (isteq(n, ist("connection"))) {
h1_parse_connection_header(h1m, &v);
if (!v.len)
goto nextblk;
}
else if (isteq(n, ist("upgrade"))) {
h1_parse_upgrade_header(h1m, v);
}
else if ((isteq(n, ist("sec-websocket-accept")) && h1m->flags & H1_MF_RESP) ||
(isteq(n, ist("sec-websocket-key")) && !(h1m->flags & H1_MF_RESP))) {
h1s->flags |= H1S_F_HAVE_WS_KEY;
}
else if (isteq(n, ist("te"))) {
/* "te" may only be sent with "trailers" if this value
* is present, otherwise it must be deleted.
*/
v = istist(v, ist("trailers"));
if (!isttest(v) || (v.len > 8 && v.ptr[8] != ','))
goto nextblk;
v = ist("trailers");
}
/* Skip header if same name is used to add the server name */
if (!(h1m->flags & H1_MF_RESP) && isttest(h1c->px->server_id_hdr_name) &&
isteqi(n, h1c->px->server_id_hdr_name))
goto nextblk;
/* Try to adjust the case of the header name */
if (h1c->px->options2 & (PR_O2_H1_ADJ_BUGCLI|PR_O2_H1_ADJ_BUGSRV))
h1_adjust_case_outgoing_hdr(h1s, h1m, &n);
if (!h1_format_htx_hdr(n, v, &outbuf))
goto full;
}
else if (type == HTX_BLK_EOH) {
h1m->state = H1_MSG_LAST_LF;
break; /* Do not consume this block */
}
else if (type == HTX_BLK_UNUSED)
goto nextblk;
else
goto error;
nextblk:
ret += sz;
count -= sz;
blk = htx_remove_blk(htx, blk);
}
copy:
b_add(&h1c->obuf, outbuf.data);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto copy;
error:
ret = 0;
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on message headers",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Handle the EOH and perform last processing before sending the data. It
* returns the number of bytes consumed or zero if nothing was done or if an
* error occurred. No more than <count> bytes can be sent.
*/
static size_t h1_make_eoh(struct h1s *h1s, struct h1m *h1m, struct htx *htx, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx_blk *blk;
struct buffer outbuf;
enum htx_blk_type type;
struct ist n, v;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){count});
while (1) {
blk = htx_get_head_blk(htx);
if (!blk)
goto end;
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
if (type == HTX_BLK_UNUSED)
continue;
if (type != HTX_BLK_EOH || sz > count)
goto error;
break;
}
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
outbuf = b_make(b_tail(&h1c->obuf), b_contig_space(&h1c->obuf), 0, 0);
/* Deal with removed "Content-Length" or "Transfer-Encoding" headers during analysis */
if (((h1m->flags & H1_MF_CLEN) && !(h1s->flags & H1S_F_HAVE_CLEN))||
((h1m->flags & H1_MF_CHNK) && !(h1s->flags & H1S_F_HAVE_CHNK))) {
TRACE_STATE("\"Content-Length\" or \"Transfer-Encoding\" header removed during analysis", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
if (h1s->flags & (H1S_F_HAVE_CLEN|H1S_F_HAVE_CHNK)) {
/* At least on header is present, we can continue */
if (!(h1s->flags & H1S_F_HAVE_CLEN)) {
h1m->curr_len = h1m->body_len = 0;
h1m->flags &= ~H1_MF_CLEN;
}
else /* h1s->flags & H1S_F_HAVE_CHNK */
h1m->flags &= ~(H1_MF_XFER_ENC|H1_MF_CHNK);
}
else {
/* Both headers are missing */
if (h1m->flags & H1_MF_RESP) {
/* It is a esponse: Switch to unknown xfer length */
h1m->flags &= ~(H1_MF_XFER_LEN|H1_MF_XFER_ENC|H1_MF_CLEN|H1_MF_CHNK);
h1s->flags &= ~(H1S_F_HAVE_CLEN|H1S_F_HAVE_CHNK);
TRACE_STATE("Switch response to unknown XFER length", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
}
else {
/* It is the request: Add "Content-Length: 0" header and skip payload */
struct ist n = ist("content-length");
if (h1c->px->options2 & (PR_O2_H1_ADJ_BUGCLI|PR_O2_H1_ADJ_BUGSRV))
h1_adjust_case_outgoing_hdr(h1s, h1m, &n);
if (!h1_format_htx_hdr(n, ist("0"), &outbuf))
goto full;
h1m->flags = (h1m->flags & ~(H1_MF_XFER_ENC|H1_MF_CHNK)) | H1_MF_CLEN;
h1s->flags = (h1s->flags & ~H1S_F_HAVE_CHNK) | (H1S_F_HAVE_CLEN|H1S_F_BODYLESS_REQ);
h1m->curr_len = h1m->body_len = 0;
TRACE_STATE("Set request content-length to 0 and skip payload", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
}
}
}
/* Deal with "Connection" header */
if (!(h1s->flags & H1S_F_HAVE_O_CONN)) {
if ((h1m->flags & (H1_MF_XFER_ENC|H1_MF_CLEN)) == (H1_MF_XFER_ENC|H1_MF_CLEN)) {
/* T-E + C-L: force close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
h1m->flags &= ~H1_MF_CLEN;
TRACE_STATE("force close mode (T-E + C-L)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
else if ((h1m->flags & (H1_MF_VER_11|H1_MF_XFER_ENC)) == H1_MF_XFER_ENC) {
/* T-E + HTTP/1.0: force close */
h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
TRACE_STATE("force close mode (T-E + HTTP/1.0)", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1s->h1c->conn, h1s);
}
/* the conn_mode must be processed. So do it */
n = ist("connection");
v = ist("");
h1_process_output_conn_mode(h1s, h1m, &v);
if (v.len) {
/* Try to adjust the case of the header name */
if (h1c->px->options2 & (PR_O2_H1_ADJ_BUGCLI|PR_O2_H1_ADJ_BUGSRV))
h1_adjust_case_outgoing_hdr(h1s, h1m, &n);
if (!h1_format_htx_hdr(n, v, &outbuf))
goto full;
}
h1s->flags |= H1S_F_HAVE_O_CONN;
}
/* Deal with "Transfer-Encoding" header */
if ((h1s->meth != HTTP_METH_CONNECT &&
(h1m->flags & (H1_MF_VER_11|H1_MF_RESP|H1_MF_CLEN|H1_MF_CHNK|H1_MF_XFER_LEN)) ==
(H1_MF_VER_11|H1_MF_XFER_LEN)) ||
(h1s->status >= 200 && !(h1s->flags & H1S_F_BODYLESS_RESP) &&
!(h1s->meth == HTTP_METH_CONNECT && h1s->status >= 200 && h1s->status < 300) &&
(h1m->flags & (H1_MF_VER_11|H1_MF_RESP|H1_MF_CLEN|H1_MF_CHNK|H1_MF_XFER_LEN)) ==
(H1_MF_VER_11|H1_MF_RESP|H1_MF_XFER_LEN)))
h1m->flags |= H1_MF_CHNK;
if ((h1m->flags & H1_MF_CHNK) && !(h1s->flags & H1S_F_HAVE_CHNK)) {
/* chunking needed but header not seen */
n = ist("transfer-encoding");
v = ist("chunked");
if (h1c->px->options2 & (PR_O2_H1_ADJ_BUGCLI|PR_O2_H1_ADJ_BUGSRV))
h1_adjust_case_outgoing_hdr(h1s, h1m, &n);
if (!h1_format_htx_hdr(n, v, &outbuf))
goto full;
TRACE_STATE("add \"Transfer-Encoding: chunked\"", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
h1s->flags |= H1S_F_HAVE_CHNK;
}
/* Add the server name to a header (if requested) */
if (!(h1s->flags & H1S_F_HAVE_SRV_NAME) &&
!(h1m->flags & H1_MF_RESP) && isttest(h1c->px->server_id_hdr_name)) {
struct server *srv = objt_server(h1c->conn->target);
if (srv) {
n = h1c->px->server_id_hdr_name;
v = ist(srv->id);
/* Try to adjust the case of the header name */
if (h1c->px->options2 & (PR_O2_H1_ADJ_BUGCLI|PR_O2_H1_ADJ_BUGSRV))
h1_adjust_case_outgoing_hdr(h1s, h1m, &n);
if (!h1_format_htx_hdr(n, v, &outbuf))
goto full;
}
TRACE_STATE("add server name header", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
h1s->flags |= H1S_F_HAVE_SRV_NAME;
}
/* Add websocket handshake key if needed */
if (!(h1s->flags & H1S_F_HAVE_WS_KEY) &&
(h1m->flags & (H1_MF_CONN_UPG|H1_MF_UPG_WEBSOCKET)) == (H1_MF_CONN_UPG|H1_MF_UPG_WEBSOCKET)) {
if (!(h1m->flags & H1_MF_RESP)) {
/* generate a random websocket key
* stored in the session to
* verify it on the response side
*/
h1_generate_random_ws_input_key(h1s->ws_key);
if (!h1_format_htx_hdr(ist("Sec-Websocket-Key"),
ist(h1s->ws_key),
&outbuf)) {
goto full;
}
}
else {
/* add the response header key */
char key[29];
h1_calculate_ws_output_key(h1s->ws_key, key);
if (!h1_format_htx_hdr(ist("Sec-Websocket-Accept"),
ist(key),
&outbuf)) {
goto full;
}
}
h1s->flags |= H1S_F_HAVE_WS_KEY;
}
/*
* All headers was sent, now process EOH
*/
if (!(h1m->flags & H1_MF_RESP) && h1s->meth == HTTP_METH_CONNECT) {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
/* a CONNECT request was sent. Output processing is now blocked
* waiting the server response.
*/
h1m->state = H1_MSG_DONE;
h1s->flags |= H1S_F_TX_BLK;
TRACE_STATE("CONNECT request waiting for tunnel mode", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
}
else if ((h1m->flags & H1_MF_RESP) &&
((h1s->meth == HTTP_METH_CONNECT && h1s->status >= 200 && h1s->status < 300) || h1s->status == 101)) {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
/* a successful reply to a CONNECT or a protocol switching is sent
* to the client. Switch the response to tunnel mode.
*/
h1_set_tunnel_mode(h1s);
}
else if ((h1m->flags & H1_MF_RESP) &&
h1s->status < 200 && (h1s->status == 100 || h1s->status >= 102)) {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
/* 1xx response was sent, reset response processing */
h1m_init_res(h1m);
h1m->flags |= (H1_MF_NO_PHDR|H1_MF_CLEAN_CONN_HDR);
h1s->flags &= ~H1S_F_HAVE_O_CONN;
TRACE_STATE("1xx response xferred", H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
}
else if (htx_is_unique_blk(htx, blk) &&
((htx->flags & HTX_FL_EOM) || ((h1m->flags & H1_MF_CLEN) && !h1m->curr_len))) {
/* EOM flag is set and it is the last block or there is no
* payload. If cannot be removed now. We must emit the end of
* the message first to be sure the output buffer is not full
*/
if ((h1m->flags & H1_MF_CHNK) && !(h1s->flags & H1S_F_BODYLESS_RESP)) {
if (!chunk_memcat(&outbuf, "\r\n0\r\n\r\n", 7))
goto full;
}
else if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
h1m->state = ((htx->flags & HTX_FL_EOM) ? H1_MSG_DONE : H1_MSG_TRAILERS);
}
else {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
h1m->state = ((h1m->flags & H1_MF_CHNK) ? H1_MSG_CHUNK_SIZE: H1_MSG_DATA);
}
TRACE_PROTO((!(h1m->flags & H1_MF_RESP) ? "H1 request headers xferred" : "H1 response headers xferred"),
H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s);
ret += sz;
htx_remove_blk(htx, blk);
copy:
b_add(&h1c->obuf, outbuf.data);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_HDRS, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto copy;
error:
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on message EOH",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Try to send the message payload from the HTX message <htx> for the stream
* <h1s>. In this case, we are not in TUNNEL mode. It returns the number of
* bytes consumed or zero if nothing was done or if an error occurred. No more
* than <count> bytes can be sent.
*/
static size_t h1_make_data(struct h1s *h1s, struct h1m *h1m, struct buffer *buf, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx *htx = htx_from_buf(buf);
struct htx_blk *blk;
struct buffer outbuf;
enum htx_blk_type type;
struct ist v;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, htx, (size_t[]){count});
blk = htx_get_head_blk(htx);
/* Perform some optimizations to reduce the number of buffer copies. If
* the mux's buffer is empty and the htx area contains exactly one data
* block of the same size as the requested count, then it's possible to
* simply swap the caller's buffer with the mux's output buffer and
* adjust offsets and length to match the entire DATA HTX block in the
* middle. In this case we perform a true zero-copy operation from
* end-to-end. This is the situation that happens all the time with
* large files.
*/
if (((!(h1m->flags & H1_MF_RESP) && !(h1s->flags & H1S_F_BODYLESS_REQ)) ||
((h1m->flags & H1_MF_RESP) && !(h1s->flags & H1S_F_BODYLESS_RESP))) &&
!b_data(&h1c->obuf) &&
(!(h1m->flags & H1_MF_CHNK) || ((h1m->flags & H1_MF_CHNK) && (!h1m->curr_len || count == h1m->curr_len))) &&
htx_nbblks(htx) == 1 &&
htx_get_blk_type(blk) == HTX_BLK_DATA &&
htx_get_blk_value(htx, blk).len == count) {
void *old_area;
uint64_t extra;
int eom = (htx->flags & HTX_FL_EOM);
extra = htx->extra;
old_area = h1c->obuf.area;
h1c->obuf.area = buf->area;
h1c->obuf.head = sizeof(struct htx) + blk->addr;
h1c->obuf.data = count;
buf->area = old_area;
buf->data = buf->head = 0;
htx = (struct htx *)buf->area;
htx_reset(htx);
htx->extra = extra;
if (h1m->flags & H1_MF_CLEN) {
if (count > h1m->curr_len) {
TRACE_ERROR("more payload than announced",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto error;
}
h1m->curr_len -= count;
if (!h1m->curr_len)
h1m->state = (eom ? H1_MSG_DONE : H1_MSG_TRAILERS);
}
else if (h1m->flags & H1_MF_CHNK) {
/* The message is chunked. We need to check if we must
* emit the chunk size, the CRLF marking the end of the
* current chunk and eventually the CRLF marking the end
* of the previous chunk (because of fast-forwarding).
* If it is the end of the message, we must
* also emit the last chunk.
*
* We have at least the size of the struct htx to write
* the chunk envelope. It should be enough.
*/
/* If is a new chunk, prepend the chunk size */
if (h1m->state == H1_MSG_CHUNK_CRLF || h1m->state == H1_MSG_CHUNK_SIZE) {
if (h1m->curr_len) {
TRACE_ERROR("chunk bigger than announced",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto error;
}
h1m->curr_len = count + (htx->extra != HTX_UNKOWN_PAYLOAD_LENGTH ? htx->extra : 0);
/* Because chunk meta-data are prepended, the chunk size of the current chunk
* must be handled before the end of the previous chunk.
*/
h1_prepend_chunk_size(&h1c->obuf, h1m->curr_len, 0);
if (h1m->state == H1_MSG_CHUNK_CRLF)
h1_prepend_chunk_crlf(&h1c->obuf);
h1m->state = H1_MSG_DATA;
}
h1m->curr_len -= count;
/* It is the end of the chunk, append the CRLF */
if (!h1m->curr_len) {
h1_append_chunk_crlf(&h1c->obuf);
h1m->state = H1_MSG_CHUNK_SIZE;
}
/* It is the end of the message, add the last chunk with the extra CRLF */
if (eom) {
if (h1m->curr_len) {
TRACE_ERROR("chunk smaller than announced",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto error;
}
/* Emit the last chunk too at the buffer's end */
b_putblk(&h1c->obuf, "0\r\n\r\n", 5);
h1m->state = H1_MSG_DONE;
}
}
/* Nothing to do if XFER len is unknown */
ret = count;
TRACE_PROTO("H1 message payload data xferred (zero-copy)", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, 0, (size_t[]){ret});
goto end;
}
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
outbuf = b_make(b_tail(&h1c->obuf), b_contig_space(&h1c->obuf), 0, 0);
/* Handle now case of CRLF at the end of a chun. */
if ((h1m->flags & H1_MF_CHNK) && h1m->state == H1_MSG_CHUNK_CRLF) {
if (h1m->curr_len) {
TRACE_ERROR("chunk bigger than announced",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto error;
}
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
h1m->state = H1_MSG_CHUNK_SIZE;
}
while (blk && count) {
uint32_t vlen, chklen;
int last_data = 0;
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
vlen = sz;
if (type == HTX_BLK_DATA) {
if (vlen > count) {
/* Get the maximum amount of data we can xferred */
vlen = count;
}
else if (htx_is_unique_blk(htx, blk) && (htx->flags & HTX_FL_EOM)) {
/* It is the last block of this message. After this one,
* only tunneled data may be forwarded. */
TRACE_DEVEL("last message block", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s);
last_data = 1;
}
if ((!(h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_REQ)) ||
((h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_RESP))) {
TRACE_PROTO("Skip data for bodyless message", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, htx);
goto nextblk;
}
chklen = 0;
if (h1m->flags & H1_MF_CHNK) {
/* If is a new chunk, prepend the chunk size */
if (h1m->state == H1_MSG_CHUNK_SIZE) {
h1m->curr_len = (htx->extra && htx->extra != HTX_UNKOWN_PAYLOAD_LENGTH ? htx->data + htx->extra : vlen);
if (!h1_append_chunk_size(&outbuf, h1m->curr_len)) {
h1m->curr_len = 0;
goto full;
}
h1m->state = H1_MSG_DATA;
}
if (vlen > h1m->curr_len) {
vlen = h1m->curr_len;
last_data = 0;
}
chklen = 0;
if (h1m->curr_len == vlen)
chklen += 2;
if (last_data)
chklen += 5;
}
if (vlen + chklen > b_room(&outbuf)) {
/* too large for the buffer */
if (chklen >= b_room(&outbuf))
goto full;
vlen = b_room(&outbuf) - chklen;
last_data = 0;
}
v = htx_get_blk_value(htx, blk);
v.len = vlen;
if (!h1_format_htx_data(v, &outbuf, 0))
goto full;
if (h1m->flags & H1_MF_CLEN) {
if (vlen > h1m->curr_len) {
TRACE_ERROR("more payload than announced",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto error;
}
h1m->curr_len -= vlen;
}
else if (h1m->flags & H1_MF_CHNK) {
h1m->curr_len -= vlen;
/* Space already reserved, so it must succeed */
if (!h1m->curr_len) {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto error;
h1m->state = H1_MSG_CHUNK_SIZE;
}
if (last_data) {
if (h1m->curr_len) {
TRACE_ERROR("chunk smaller than announced",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto error;
}
if (!chunk_memcat(&outbuf, "0\r\n\r\n", 5))
goto error;
}
}
}
else if (type == HTX_BLK_EOT || type == HTX_BLK_TLR) {
if ((!(h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_REQ)) ||
((h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_RESP))) {
/* Do nothing the payload must be skipped
* because it is a bodyless response
*/
}
else if (h1m->flags & H1_MF_CHNK) {
/* Emit last chunk for chunked messages only */
if (!chunk_memcat(&outbuf, "0\r\n", 3))
goto full;
}
h1m->state = H1_MSG_TRAILERS;
break;
}
else if (type == HTX_BLK_UNUSED)
goto nextblk;
else
goto error;
nextblk:
ret += vlen;
count -= vlen;
if (sz == vlen)
blk = htx_remove_blk(htx, blk);
else {
htx_cut_data_blk(htx, blk, vlen);
if (!b_room(&outbuf))
goto full;
}
if (last_data)
h1m->state = H1_MSG_DONE;
}
copy:
TRACE_PROTO("H1 message payload data xferred", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, 0, (size_t[]){ret});
b_add(&h1c->obuf, outbuf.data);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto copy;
error:
ret = 0;
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on message payload",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Try to send the tunneled data from the HTX message <htx> for the stream
* <h1s>. In this case, we are in TUNNEL mode. It returns the number of bytes
* consumed or zero if nothing was done or if an error occurred. No more than
* <count> bytes can be sent.
*/
static size_t h1_make_tunnel(struct h1s *h1s, struct h1m *h1m, struct buffer *buf, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx *htx = htx_from_buf(buf);
struct htx_blk *blk;
struct buffer outbuf;
enum htx_blk_type type;
struct ist v;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, htx, (size_t[]){count});
blk = htx_get_head_blk(htx);
/* Perform some optimizations to reduce the number of buffer copies. If
* the mux's buffer is empty and the htx area contains exactly one data
* block of the same size as the requested count, then it's possible to
* simply swap the caller's buffer with the mux's output buffer and
* adjust offsets and length to match the entire DATA HTX block in the
* middle. In this case we perform a true zero-copy operation from
* end-to-end. This is the situation that happens all the time with
* large files.
*/
if (!b_data(&h1c->obuf) &&
htx_nbblks(htx) == 1 &&
htx_get_blk_type(blk) == HTX_BLK_DATA &&
htx_get_blksz(blk) == count) {
void *old_area;
old_area = h1c->obuf.area;
h1c->obuf.area = buf->area;
h1c->obuf.head = sizeof(struct htx) + blk->addr;
h1c->obuf.data = count;
buf->area = old_area;
buf->data = buf->head = 0;
htx = (struct htx *)buf->area;
htx_reset(htx);
ret = count;
TRACE_PROTO("H1 tunneled data xferred (zero-copy)", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, 0, (size_t[]){ret});
goto end;
}
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
outbuf = b_make(b_tail(&h1c->obuf), b_contig_space(&h1c->obuf), 0, 0);
while (blk) {
uint32_t vlen;
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
vlen = sz;
if (type == HTX_BLK_DATA) {
if (vlen > count) {
/* Get the maximum amount of data we can xferred */
vlen = count;
}
if (vlen > b_room(&outbuf)) {
/* too large for the buffer */
vlen = b_room(&outbuf);
}
v = htx_get_blk_value(htx, blk);
v.len = vlen;
if (!h1_format_htx_data(v, &outbuf, 0))
goto full;
}
else if (type == HTX_BLK_UNUSED)
goto nextblk;
else
goto error;
nextblk:
ret += vlen;
count -= vlen;
if (sz == vlen)
blk = htx_remove_blk(htx, blk);
else {
htx_cut_data_blk(htx, blk, vlen);
break;
}
}
copy:
TRACE_PROTO("H1 tunneled data xferred", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, 0, (size_t[]){ret});
b_add(&h1c->obuf, outbuf.data);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto copy;
error:
ret = 0;
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on tunneled",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Try to send the trailers from the HTX message <htx> for the stream <h1s>. It
* returns the number of bytes consumed or zero if nothing was done or if an
* error occurred. No more than <count> bytes can be sent.
*/
static size_t h1_make_trailers(struct h1s *h1s, struct h1m *h1m, struct htx *htx, size_t count)
{
struct h1c *h1c = h1s->h1c;
struct htx_blk *blk;
struct buffer outbuf;
enum htx_blk_type type;
struct ist n, v;
uint32_t sz;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_TLRS, h1c->conn, h1s, htx, (size_t[]){count});
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
chunk_reset(&outbuf);
outbuf = b_make(b_tail(&h1c->obuf), b_contig_space(&h1c->obuf), 0, 0);
blk = htx_get_head_blk(htx);
while (blk) {
type = htx_get_blk_type(blk);
sz = htx_get_blksz(blk);
if (type == HTX_BLK_TLR) {
if (sz > count)
goto error;
if (!(h1m->flags & H1_MF_CHNK) ||
(!(h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_REQ)) ||
((h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_RESP)))
goto nextblk;
n = htx_get_blk_name(htx, blk);
v = htx_get_blk_value(htx, blk);
/* Try to adjust the case of the header name */
if (h1c->px->options2 & (PR_O2_H1_ADJ_BUGCLI|PR_O2_H1_ADJ_BUGSRV))
h1_adjust_case_outgoing_hdr(h1s, h1m, &n);
if (!h1_format_htx_hdr(n, v, &outbuf))
goto full;
}
else if (type == HTX_BLK_EOT) {
if (!(h1m->flags & H1_MF_CHNK) ||
(!(h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_REQ)) ||
((h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_RESP))) {
TRACE_PROTO((!(h1m->flags & H1_MF_RESP) ? "H1 request trailers skipped" : "H1 response trailers skipped"),
H1_EV_TX_DATA|H1_EV_TX_TLRS, h1c->conn, h1s);
}
else {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
TRACE_PROTO((!(h1m->flags & H1_MF_RESP) ? "H1 request trailers xferred" : "H1 response trailers xferred"),
H1_EV_TX_DATA|H1_EV_TX_TLRS, h1c->conn, h1s);
}
h1m->state = H1_MSG_DONE;
}
else if (type == HTX_BLK_UNUSED)
goto nextblk;
else
goto error;
nextblk:
ret += sz;
count -= sz;
blk = htx_remove_blk(htx, blk);
}
copy:
b_add(&h1c->obuf, outbuf.data);
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_TLRS, h1c->conn, h1s, htx, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto copy;
error:
ret = 0;
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error on message trailers",
H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
/* Try to send the header for a chunk of <len> bytes. It returns the number of
* bytes consumed or zero if nothing was done or if an error occurred..
*/
static size_t h1_make_chunk(struct h1s *h1s, struct h1m * h1m, size_t len)
{
struct h1c *h1c = h1s->h1c;
struct buffer outbuf;
size_t ret = 0;
TRACE_ENTER(H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s);
if (!h1_get_obuf(h1c)) {
TRACE_STATE("waiting for h1c obuf allocation", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
goto end;
}
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
outbuf = b_make(b_tail(&h1c->obuf), b_contig_space(&h1c->obuf), 0, 0);
if (h1m->state == H1_MSG_CHUNK_CRLF) {
if (!chunk_memcat(&outbuf, "\r\n", 2))
goto full;
h1m->state = H1_MSG_CHUNK_SIZE;
}
if (!h1_append_chunk_size(&outbuf, len))
goto full;
h1m->state = H1_MSG_DATA;
TRACE_PROTO("H1 chunk info xferred", H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, 0, (size_t[]){ret});
b_add(&h1c->obuf, outbuf.data);
ret = outbuf.data;
end:
TRACE_LEAVE(H1_EV_TX_DATA|H1_EV_TX_BODY, h1c->conn, h1s, NULL, (size_t[]){ret});
return ret;
full:
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
goto end;
}
/*
* Process outgoing data. It parses data and transfer them from the channel buffer into
* h1c->obuf. It returns the number of bytes parsed and transferred if > 0, or
* 0 if it couldn't proceed.
*/
static size_t h1_process_mux(struct h1c *h1c, struct buffer *buf, size_t count)
{
struct h1s *h1s = h1c->h1s;
struct h1m *h1m;
struct htx *htx;
size_t ret, total = 0;
htx = htxbuf(buf);
TRACE_ENTER(H1_EV_TX_DATA, h1c->conn, h1s, htx, (size_t[]){count});
if (htx_is_empty(htx))
goto end;
if (h1s->flags & (H1S_F_INTERNAL_ERROR|H1S_F_PROCESSING_ERROR|H1S_F_TX_BLK))
goto end;
if (!h1_get_obuf(h1c)) {
TRACE_STATE("waiting for h1c obuf allocation", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
goto end;
}
h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->res : &h1s->req);
while (!(h1c->flags & H1C_F_OUT_FULL) &&
!(h1s->flags & (H1S_F_PROCESSING_ERROR|H1S_F_TX_BLK)) &&
!htx_is_empty(htx) && count) {
switch (h1m->state) {
case H1_MSG_RQBEFORE:
ret = h1_make_reqline(h1s, h1m, htx, count);
break;
case H1_MSG_RPBEFORE:
ret = h1_make_stline(h1s, h1m, htx, count);
break;
case H1_MSG_HDR_NAME:
ret = h1_make_headers(h1s, h1m, htx, count);
if (unlikely(h1m->state == H1_MSG_LAST_LF)) // in case of no header
ret += h1_make_eoh(h1s, h1m, htx, count);
break;
case H1_MSG_LAST_LF:
ret = h1_make_eoh(h1s, h1m, htx, count);
break;
case H1_MSG_CHUNK_SIZE:
case H1_MSG_CHUNK_CRLF:
case H1_MSG_DATA:
ret = h1_make_data(h1s, h1m, buf, count);
if (ret > 0)
htx = htx_from_buf(buf);
if (unlikely(h1m->state == H1_MSG_TRAILERS)) // in case of no data
ret += h1_make_trailers(h1s, h1m, htx, count);
break;
case H1_MSG_TUNNEL:
ret = h1_make_tunnel(h1s, h1m, buf, count);
if (ret > 0)
htx = htx_from_buf(buf);
break;
case H1_MSG_TRAILERS:
ret = h1_make_trailers(h1s, h1m, htx, count);
break;
case H1_MSG_DONE:
TRACE_STATE("unexpected data xferred in done state", H1_EV_TX_DATA|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
__fallthrough;
default:
ret = 0;
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("processing error", H1_EV_TX_DATA|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
break;
}
if (!ret)
break;
total += ret;
count -= ret;
if (h1m->state == H1_MSG_DONE) {
TRACE_USER((!(h1m->flags & H1_MF_RESP) ? "H1 request fully xferred" : "H1 response fully xferred"),
H1_EV_TX_DATA, h1c->conn, h1s);
if (h1s->flags & H1S_F_RX_BLK) {
h1s->flags &= ~H1S_F_RX_BLK;
h1_wake_stream_for_recv(h1s);
TRACE_STATE("Re-enable input processing", H1_EV_TX_DATA|H1_EV_H1S_BLK|H1_EV_STRM_WAKE, h1c->conn, h1s);
}
}
}
htx_to_buf(htx, buf);
if (!buf_room_for_htx_data(&h1c->obuf)) {
TRACE_STATE("h1c obuf full", H1_EV_TX_DATA|H1_EV_H1S_BLK, h1c->conn, h1s);
h1c->flags |= H1C_F_OUT_FULL;
}
end:
/* Both the request and the response reached the DONE state. So set EOI
* flag on the conn-stream. Most of time, the flag will already be set,
* except for protocol upgrades. Report an error if data remains blocked
* in the output buffer.
*/
if (h1s->req.state == H1_MSG_DONE && h1s->res.state == H1_MSG_DONE) {
se_fl_set(h1s->sd, SE_FL_EOI);
if (!htx_is_empty(htx)) {
htx->flags |= HTX_FL_PROCESSING_ERROR;
h1s->flags |= H1S_F_PROCESSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("txn done but data waiting to be sent, set error on h1c", H1_EV_H1C_ERR, h1c->conn, h1s);
}
}
TRACE_LEAVE(H1_EV_TX_DATA, h1c->conn, h1s, htx, (size_t[]){total});
return total;
}
/*********************************************************/
/* functions below are I/O callbacks from the connection */
/*********************************************************/
static void h1_wake_stream_for_recv(struct h1s *h1s)
{
if (h1s && h1s->subs && h1s->subs->events & SUB_RETRY_RECV) {
TRACE_POINT(H1_EV_STRM_WAKE, h1s->h1c->conn, h1s);
tasklet_wakeup(h1s->subs->tasklet);
h1s->subs->events &= ~SUB_RETRY_RECV;
if (!h1s->subs->events)
h1s->subs = NULL;
}
}
static void h1_wake_stream_for_send(struct h1s *h1s)
{
if (h1s && h1s->subs && h1s->subs->events & SUB_RETRY_SEND) {
TRACE_POINT(H1_EV_STRM_WAKE, h1s->h1c->conn, h1s);
tasklet_wakeup(h1s->subs->tasklet);
h1s->subs->events &= ~SUB_RETRY_SEND;
if (!h1s->subs->events)
h1s->subs = NULL;
}
}
/* alerts the data layer following this sequence :
* - if the h1s' data layer is subscribed to recv, then it's woken up for recv
* - if its subscribed to send, then it's woken up for send
* - if it was subscribed to neither, its ->wake() callback is called
*/
static void h1_alert(struct h1s *h1s)
{
if (h1s->subs) {
h1_wake_stream_for_recv(h1s);
h1_wake_stream_for_send(h1s);
}
else if (h1s_sc(h1s) && h1s_sc(h1s)->app_ops->wake != NULL) {
TRACE_POINT(H1_EV_STRM_WAKE, h1s->h1c->conn, h1s);
h1s_sc(h1s)->app_ops->wake(h1s_sc(h1s));
}
}
/* Try to send an HTTP error with h1c->errcode status code. It returns 1 on success
* and 0 on error. The flag H1C_F_ABRT_PENDING is set on the H1 connection for
* retryable errors (allocation error or buffer full). On success, the error is
* copied in the output buffer.
*/
static int h1_send_error(struct h1c *h1c)
{
int rc = http_get_status_idx(h1c->errcode);
int ret = 0;
TRACE_ENTER(H1_EV_H1C_ERR, h1c->conn, 0, 0, (size_t[]){h1c->errcode});
/* Verify if the error is mapped on /dev/null or any empty file */
/// XXX: do a function !
if (h1c->px->replies[rc] &&
h1c->px->replies[rc]->type == HTTP_REPLY_ERRMSG &&
h1c->px->replies[rc]->body.errmsg &&
b_is_null(h1c->px->replies[rc]->body.errmsg)) {
/* Empty error, so claim a success */
ret = 1;
goto out;
}
if (h1c->flags & (H1C_F_OUT_ALLOC|H1C_F_OUT_FULL)) {
h1c->flags |= H1C_F_ABRT_PENDING;
goto out;
}
if (!h1_get_obuf(h1c)) {
h1c->flags |= H1C_F_ABRT_PENDING;
TRACE_STATE("waiting for h1c obuf allocation", H1_EV_H1C_ERR|H1_EV_H1C_BLK, h1c->conn);
goto out;
}
ret = b_istput(&h1c->obuf, ist(http_err_msgs[rc]));
if (unlikely(ret <= 0)) {
if (!ret) {
h1c->flags |= (H1C_F_OUT_FULL|H1C_F_ABRT_PENDING);
TRACE_STATE("h1c obuf full", H1_EV_H1C_ERR|H1_EV_H1C_BLK, h1c->conn);
goto out;
}
else {
/* we cannot report this error, so claim a success */
ret = 1;
}
}
if (h1c->state == H1_CS_EMBRYONIC) {
BUG_ON(h1c->h1s == NULL || h1s_sc(h1c->h1s) != NULL);
TRACE_DEVEL("Abort embryonic H1S", H1_EV_H1C_ERR, h1c->conn, h1c->h1s);
h1s_destroy(h1c->h1s);
}
h1c->flags = (h1c->flags & ~(H1C_F_WAIT_NEXT_REQ|H1C_F_ABRT_PENDING)) | H1C_F_ABRTED;
h1_close(h1c);
out:
TRACE_LEAVE(H1_EV_H1C_ERR, h1c->conn);
return ret;
}
/* Try to send a 500 internal error. It relies on h1_send_error to send the
* error. This function takes care of incrementing stats and tracked counters.
*/
static int h1_handle_internal_err(struct h1c *h1c)
{
struct session *sess = h1c->conn->owner;
int ret = 0;
if (h1c->state == H1_CS_DRAINING) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1s_destroy(h1c->h1s);
goto end;
}
session_inc_http_req_ctr(sess);
proxy_inc_fe_req_ctr(sess->listener, sess->fe, 1);
_HA_ATOMIC_INC(&sess->fe->fe_counters.p.http.rsp[5]);
_HA_ATOMIC_INC(&sess->fe->fe_counters.internal_errors);
if (sess->listener && sess->listener->counters)
_HA_ATOMIC_INC(&sess->listener->counters->internal_errors);
h1c->errcode = 500;
ret = h1_send_error(h1c);
sess_log(sess);
end:
return ret;
}
/* Try to send an error because of a parsing error. By default a 400 bad request
* error is returned. But the status code may be specified by setting
* h1c->errcode. It relies on h1_send_error to send the error. This function
* takes care of incrementing stats and tracked counters.
*/
static int h1_handle_parsing_error(struct h1c *h1c)
{
struct session *sess = h1c->conn->owner;
int ret = 0;
if (h1c->state == H1_CS_DRAINING) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1s_destroy(h1c->h1s);
goto end;
}
if (!b_data(&h1c->ibuf) && ((h1c->flags & H1C_F_WAIT_NEXT_REQ) || (sess->fe->options & PR_O_IGNORE_PRB))) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1_close(h1c);
goto end;
}
session_inc_http_req_ctr(sess);
session_inc_http_err_ctr(sess);
proxy_inc_fe_req_ctr(sess->listener, sess->fe, 1);
_HA_ATOMIC_INC(&sess->fe->fe_counters.p.http.rsp[4]);
_HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
if (sess->listener && sess->listener->counters)
_HA_ATOMIC_INC(&sess->listener->counters->failed_req);
if (!h1c->errcode)
h1c->errcode = 400;
ret = h1_send_error(h1c);
if (b_data(&h1c->ibuf) || !(sess->fe->options & PR_O_NULLNOLOG))
sess_log(sess);
end:
return ret;
}
/* Try to send a 501 not implemented error. It relies on h1_send_error to send
* the error. This function takes care of incrementing stats and tracked
* counters.
*/
static int h1_handle_not_impl_err(struct h1c *h1c)
{
struct session *sess = h1c->conn->owner;
int ret = 0;
if (h1c->state == H1_CS_DRAINING) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1s_destroy(h1c->h1s);
goto end;
}
if (!b_data(&h1c->ibuf) && ((h1c->flags & H1C_F_WAIT_NEXT_REQ) || (sess->fe->options & PR_O_IGNORE_PRB))) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1_close(h1c);
goto end;
}
session_inc_http_req_ctr(sess);
proxy_inc_fe_req_ctr(sess->listener, sess->fe, 1);
_HA_ATOMIC_INC(&sess->fe->fe_counters.p.http.rsp[4]);
_HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
if (sess->listener && sess->listener->counters)
_HA_ATOMIC_INC(&sess->listener->counters->failed_req);
h1c->errcode = 501;
ret = h1_send_error(h1c);
if (b_data(&h1c->ibuf) || !(sess->fe->options & PR_O_NULLNOLOG))
sess_log(sess);
end:
return ret;
}
/* Try to send a 408 timeout error. It relies on h1_send_error to send the
* error. This function takes care of incrementing stats and tracked counters.
*/
static int h1_handle_req_tout(struct h1c *h1c)
{
struct session *sess = h1c->conn->owner;
int ret = 0;
if (h1c->state == H1_CS_DRAINING) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1s_destroy(h1c->h1s);
goto end;
}
if (!b_data(&h1c->ibuf) && ((h1c->flags & H1C_F_WAIT_NEXT_REQ) || (sess->fe->options & PR_O_IGNORE_PRB))) {
h1c->flags = (h1c->flags & ~H1C_F_WAIT_NEXT_REQ) | H1C_F_ABRTED;
h1_close(h1c);
goto end;
}
session_inc_http_req_ctr(sess);
proxy_inc_fe_req_ctr(sess->listener, sess->fe, 1);
_HA_ATOMIC_INC(&sess->fe->fe_counters.p.http.rsp[4]);
_HA_ATOMIC_INC(&sess->fe->fe_counters.failed_req);
if (sess->listener && sess->listener->counters)
_HA_ATOMIC_INC(&sess->listener->counters->failed_req);
h1c->errcode = 408;
ret = h1_send_error(h1c);
if (b_data(&h1c->ibuf) || !(sess->fe->options & PR_O_NULLNOLOG))
sess_log(sess);
end:
return ret;
}
/*
* Attempt to read data, and subscribe if none available
*/
static int h1_recv(struct h1c *h1c)
{
struct connection *conn = h1c->conn;
size_t ret = 0, max;
int flags = 0;
TRACE_ENTER(H1_EV_H1C_RECV, h1c->conn);
if (h1c->wait_event.events & SUB_RETRY_RECV) {
TRACE_DEVEL("leaving on sub_recv", H1_EV_H1C_RECV, h1c->conn);
return (b_data(&h1c->ibuf));
}
if ((h1c->flags & H1C_F_WANT_FASTFWD) || !h1_recv_allowed(h1c)) {
TRACE_DEVEL("leaving on (want_fastfwde|!recv_allowed)", H1_EV_H1C_RECV, h1c->conn);
return 1;
}
if (!h1_get_ibuf(h1c)) {
TRACE_STATE("waiting for h1c ibuf allocation", H1_EV_H1C_RECV|H1_EV_H1C_BLK, h1c->conn);
return 0;
}
/*
* If we only have a small amount of data, realign it,
* it's probably cheaper than doing 2 recv() calls.
*/
if (b_data(&h1c->ibuf) > 0 && b_data(&h1c->ibuf) < 128)
b_slow_realign_ofs(&h1c->ibuf, trash.area, sizeof(struct htx));
max = buf_room_for_htx_data(&h1c->ibuf);
/* avoid useless reads after first responses */
if (!h1c->h1s ||
(!(h1c->flags & H1C_F_IS_BACK) && h1c->h1s->req.state == H1_MSG_RQBEFORE) ||
((h1c->flags & H1C_F_IS_BACK) && h1c->h1s->res.state == H1_MSG_RPBEFORE)) {
flags |= CO_RFL_READ_ONCE;
/* we know that the first read will be constrained to a smaller
* read by the stream layer in order to respect the reserve.
* Reading too much will result in global.tune.maxrewrite being
* left at the end of the buffer, and in a very small read
* being performed again to complete them (typically 16 bytes
* freed in the index after headers were consumed) before
* another larger read. Instead, given that we know we're
* waiting for a header and we'll be limited, let's perform a
* shorter first read that the upper layer can retrieve by just
* a pointer swap and the next read will be doable at once in
* an empty buffer.
*/
if (max > global.tune.bufsize - global.tune.maxrewrite)
max = global.tune.bufsize - global.tune.maxrewrite;
}
if (max) {
if (h1c->flags & H1C_F_IN_FULL) {
h1c->flags &= ~H1C_F_IN_FULL;
TRACE_STATE("h1c ibuf not full anymore", H1_EV_H1C_RECV|H1_EV_H1C_BLK);
}
if (!b_data(&h1c->ibuf)) {
/* try to pre-align the buffer like the rxbufs will be
* to optimize memory copies.
*/
h1c->ibuf.head = sizeof(struct htx);
}
ret = conn->xprt->rcv_buf(conn, conn->xprt_ctx, &h1c->ibuf, max, flags);
HA_ATOMIC_ADD(&h1c->px_counters->bytes_in, ret);
}
if (conn_xprt_read0_pending(conn)) {
TRACE_DEVEL("read0 on connection", H1_EV_H1C_RECV, h1c->conn);
h1c->flags |= H1C_F_EOS;
}
if (h1c->conn->flags & CO_FL_ERROR) {
TRACE_DEVEL("connection error", H1_EV_H1C_RECV, h1c->conn);
h1c->flags |= H1C_F_ERROR;
}
if (max && !ret && h1_recv_allowed(h1c)) {
TRACE_STATE("failed to receive data, subscribing", H1_EV_H1C_RECV, h1c->conn);
conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
else {
TRACE_DATA("data received or pending or connection error", H1_EV_H1C_RECV, h1c->conn, 0, 0, (size_t[]){ret});
h1_wake_stream_for_recv(h1c->h1s);
}
if (!b_data(&h1c->ibuf))
h1_release_buf(h1c, &h1c->ibuf);
else if (!buf_room_for_htx_data(&h1c->ibuf)) {
h1c->flags |= H1C_F_IN_FULL;
TRACE_STATE("h1c ibuf full", H1_EV_H1C_RECV|H1_EV_H1C_BLK);
}
TRACE_LEAVE(H1_EV_H1C_RECV, h1c->conn);
return !!ret || (h1c->flags & (H1C_F_EOS|H1C_F_ERROR));
}
/*
* Try to send data if possible
*/
static int h1_send(struct h1c *h1c)
{
struct connection *conn = h1c->conn;
unsigned int flags = 0;
size_t ret;
int sent = 0;
TRACE_ENTER(H1_EV_H1C_SEND, h1c->conn);
if (h1c->flags & (H1C_F_ERROR|H1C_F_ERR_PENDING)) {
TRACE_DEVEL("leaving on H1C error|err_pending", H1_EV_H1C_SEND, h1c->conn);
b_reset(&h1c->obuf);
if (h1c->flags & H1C_F_EOS)
h1c->flags |= H1C_F_ERROR;
return 1;
}
if (!b_data(&h1c->obuf))
goto end;
if (h1c->flags & H1C_F_CO_MSG_MORE)
flags |= CO_SFL_MSG_MORE;
if (h1c->flags & H1C_F_CO_STREAMER)
flags |= CO_SFL_STREAMER;
ret = conn->xprt->snd_buf(conn, conn->xprt_ctx, &h1c->obuf, b_data(&h1c->obuf), flags);
if (ret > 0) {
TRACE_DATA("data sent", H1_EV_H1C_SEND, h1c->conn, 0, 0, (size_t[]){ret});
if (h1c->flags & H1C_F_OUT_FULL) {
h1c->flags &= ~H1C_F_OUT_FULL;
TRACE_STATE("h1c obuf not full anymore", H1_EV_STRM_SEND|H1_EV_H1S_BLK, h1c->conn);
}
HA_ATOMIC_ADD(&h1c->px_counters->bytes_out, ret);
b_del(&h1c->obuf, ret);
sent = 1;
}
if (conn->flags & CO_FL_ERROR) {
/* connection error, nothing to send, clear the buffer to release it */
TRACE_DEVEL("connection error", H1_EV_H1C_SEND, h1c->conn);
h1c->flags |= H1C_F_ERR_PENDING;
if (h1c->flags & H1C_F_EOS)
h1c->flags |= H1C_F_ERROR;
else if (!(h1c->wait_event.events & SUB_RETRY_RECV)) {
/* EOS not seen, so subscribe for reads to be able to
* catch the error on the reading path. It is especially
* important if EOI was reached.
*/
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
b_reset(&h1c->obuf);
}
end:
if (!(h1c->flags & (H1C_F_OUT_FULL|H1C_F_OUT_ALLOC)))
h1_wake_stream_for_send(h1c->h1s);
/* We're done, no more to send */
if (!b_data(&h1c->obuf)) {
TRACE_DEVEL("leaving with everything sent", H1_EV_H1C_SEND, h1c->conn);
h1_release_buf(h1c, &h1c->obuf);
if (h1c->state == H1_CS_CLOSING) {
TRACE_STATE("process pending shutdown for writes", H1_EV_H1C_SEND, h1c->conn);
h1_shutw_conn(conn);
}
}
else if (!(h1c->wait_event.events & SUB_RETRY_SEND)) {
TRACE_STATE("more data to send, subscribing", H1_EV_H1C_SEND, h1c->conn);
conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_SEND, &h1c->wait_event);
}
TRACE_LEAVE(H1_EV_H1C_SEND, h1c->conn);
return sent || (h1c->flags & (H1C_F_ERR_PENDING|H1C_F_ERROR)) || (h1c->state == H1_CS_CLOSED);
}
/* callback called on any event by the connection handler.
* It applies changes and returns zero, or < 0 if it wants immediate
* destruction of the connection.
*/
static int h1_process(struct h1c * h1c)
{
struct connection *conn = h1c->conn;
TRACE_ENTER(H1_EV_H1C_WAKE, conn);
/* Try to parse now the first block of a request, creating the H1 stream if necessary */
if (b_data(&h1c->ibuf) && /* Input data to be processed */
((h1c->state < H1_CS_RUNNING) || (h1c->state == H1_CS_DRAINING)) && /* IDLE, EMBRYONIC, UPGRADING or DRAINING */
!(h1c->flags & (H1C_F_IN_SALLOC|H1C_F_ABRT_PENDING))) { /* No allocation failure on the stream rxbuf and no ERROR on the H1C */
struct h1s *h1s = h1c->h1s;
struct buffer *buf;
size_t count;
/* When it happens for a backend connection, we may release it (it is probably a 408) */
if (h1c->flags & H1C_F_IS_BACK)
goto release;
/* First of all handle H1 to H2 upgrade (no need to create the H1 stream) */
if (h1c->state != H1_CS_DRAINING && /* Not draining message */
!(h1c->flags & H1C_F_WAIT_NEXT_REQ) && /* First request */
!(h1c->px->options2 & PR_O2_NO_H2_UPGRADE) && /* H2 upgrade supported by the proxy */
!(conn->mux->flags & MX_FL_NO_UPG)) { /* the current mux supports upgrades */
/* Try to match H2 preface before parsing the request headers. */
if (b_isteq(&h1c->ibuf, 0, b_data(&h1c->ibuf), ist(H2_CONN_PREFACE)) > 0) {
h1c->flags |= H1C_F_UPG_H2C;
if (h1c->state == H1_CS_UPGRADING) {
BUG_ON(!h1s);
se_fl_set(h1s->sd, SE_FL_EOI|SE_FL_EOS); /* Set EOS here to release the SC */
}
TRACE_STATE("release h1c to perform H2 upgrade ", H1_EV_RX_DATA|H1_EV_H1C_WAKE);
goto release;
}
}
/* Create the H1 stream if not already there */
if (!h1s) {
h1s = h1c_frt_stream_new(h1c, NULL, h1c->conn->owner);
if (!h1s) {
b_reset(&h1c->ibuf);
h1_handle_internal_err(h1c);
TRACE_ERROR("alloc error", H1_EV_H1C_WAKE|H1_EV_H1C_ERR);
goto no_parsing;
}
}
if (h1s->sess->t_idle == -1)
h1s->sess->t_idle = ns_to_ms(now_ns - h1s->sess->accept_ts) - h1s->sess->t_handshake;
/* Get the stream rxbuf */
buf = h1_get_rxbuf(h1s);
if (!buf) {
TRACE_STATE("waiting for stream rxbuf allocation", H1_EV_H1C_WAKE|H1_EV_H1C_BLK, h1c->conn);
return 0;
}
count = (buf->size - sizeof(struct htx) - global.tune.maxrewrite);
h1_process_demux(h1c, buf, count);
h1_release_buf(h1c, &h1s->rxbuf);
h1_set_idle_expiration(h1c);
if (h1c->state != H1_CS_RUNNING) { // TODO: be sure state cannot change in h1_process_demux
if (h1s->flags & H1S_F_INTERNAL_ERROR) {
h1_handle_internal_err(h1c);
TRACE_ERROR("internal error detected", H1_EV_H1C_WAKE|H1_EV_H1C_ERR);
}
else if (h1s->flags & H1S_F_NOT_IMPL_ERROR) {
h1_handle_not_impl_err(h1c);
TRACE_ERROR("not-implemented error detected", H1_EV_H1C_WAKE|H1_EV_H1C_ERR);
}
else if (h1s->flags & H1S_F_PARSING_ERROR || se_fl_test(h1s->sd, SE_FL_ERROR)) {
h1_handle_parsing_error(h1c);
TRACE_ERROR("parsing error detected", H1_EV_H1C_WAKE|H1_EV_H1C_ERR);
}
else {
TRACE_STATE("Incomplete message, subscribing", H1_EV_RX_DATA|H1_EV_H1C_BLK|H1_EV_H1C_WAKE, h1c->conn, h1s);
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
}
}
no_parsing:
h1_send(h1c);
/* H1 connection must be released ASAP if:
* - an error occurred on the H1C or
* - a read0 was received or
* - a silent shutdown was emitted and all outgoing data sent
*/
if ((h1c->flags & (H1C_F_EOS|H1C_F_ERROR|H1C_F_ABRT_PENDING|H1C_F_ABRTED)) ||
(h1c->state >= H1_CS_CLOSING && (h1c->flags & H1C_F_SILENT_SHUT) && !b_data(&h1c->obuf))) {
if (h1c->state != H1_CS_RUNNING) {
/* No stream connector or upgrading */
if (h1c->state < H1_CS_RUNNING && !(h1c->flags & (H1C_F_IS_BACK|H1C_F_ABRT_PENDING))) {
/* shutdown for reads and no error on the frontend connection: Send an error */
if (h1_handle_parsing_error(h1c))
h1_send(h1c);
}
else if (h1c->flags & H1C_F_ABRT_PENDING) {
/* Handle pending error, if any (only possible on frontend connection) */
BUG_ON(h1c->flags & H1C_F_IS_BACK);
if (h1_send_error(h1c))
h1_send(h1c);
}
else if (h1c->state == H1_CS_DRAINING) {
BUG_ON(h1c->h1s->sd && !se_fl_test(h1c->h1s->sd, SE_FL_ORPHAN));
h1s_destroy(h1c->h1s);
TRACE_STATE("abort/error when draining message. destroy h1s and close h1c", H1_EV_H1S_END, h1c->conn);
}
else {
h1_close(h1c);
TRACE_STATE("close h1c", H1_EV_H1S_END, h1c->conn);
}
/* If there is some pending outgoing data or error, just wait */
if (h1c->state == H1_CS_CLOSING || (h1c->flags & H1C_F_ABRT_PENDING))
goto end;
/* Otherwise we can release the H1 connection */
goto release;
}
else {
struct h1s *h1s = h1c->h1s;
/* Here there is still a H1 stream with a stream connector.
* Report an error at the stream level and wake up the stream
*/
BUG_ON(!h1s);
if (h1c->flags & (H1C_F_ERR_PENDING|H1C_F_ERROR)) {
se_fl_set_error(h1s->sd);
TRACE_STATE("report (ERR_PENDING|ERROR) to SE", H1_EV_H1C_RECV, conn, h1s);
}
TRACE_POINT(H1_EV_STRM_WAKE, h1c->conn, h1s);
h1_alert(h1s);
}
}
else if (h1c->state == H1_CS_DRAINING) {
BUG_ON(!h1c->h1s);
if (se_fl_test(h1c->h1s->sd, SE_FL_EOI)) {
if (h1s_must_shut_conn(h1c->h1s)) {
h1_shutw_conn(conn);
goto release;
}
h1s_finish_detach(h1c->h1s);
goto end;
}
}
if (!b_data(&h1c->ibuf))
h1_release_buf(h1c, &h1c->ibuf);
/* Check if a soft-stop is in progress.
* Release idling front connection if this is the case.
*/
if (!(h1c->flags & H1C_F_IS_BACK)) {
if (unlikely(h1c->px->flags & (PR_FL_DISABLED|PR_FL_STOPPED))) {
if (!(h1c->px->options & PR_O_IDLE_CLOSE_RESP) &&
h1c->flags & H1C_F_WAIT_NEXT_REQ) {
int send_close = 1;
/* If a close-spread-time option is set, we want to avoid
* closing all the active HTTP2 connections at once so we add a
* random factor that will spread the closing.
*/
if (tick_isset(global.close_spread_end)) {
int remaining_window = tick_remain(now_ms, global.close_spread_end);
if (remaining_window) {
/* This should increase the closing rate the
* further along the window we are.
*/
send_close = (remaining_window <= statistical_prng_range(global.close_spread_time));
}
}
else if (global.tune.options & GTUNE_DISABLE_ACTIVE_CLOSE)
send_close = 0; /* let the client close his connection himself */
if (send_close)
goto release;
}
}
}
if (h1c->state == H1_CS_RUNNING && (h1c->flags & H1C_F_WANT_FASTFWD) && !h1s_data_pending(h1c->h1s)) {
TRACE_DEVEL("xprt rcv_buf blocked (want_fastfwd), notify h1s for recv", H1_EV_H1C_RECV, h1c->conn);
h1_wake_stream_for_recv(h1c->h1s);
}
end:
h1_refresh_timeout(h1c);
TRACE_LEAVE(H1_EV_H1C_WAKE, conn);
return 0;
release:
if (h1c->state == H1_CS_UPGRADING) {
struct h1s *h1s = h1c->h1s;
/* Don't release the H1 connection right now, we must destroy
* the attached SC first */
BUG_ON(!h1s);
if (h1c->flags & H1C_F_EOS) {
se_fl_set(h1s->sd, SE_FL_EOI|SE_FL_EOS);
TRACE_STATE("report EOS to SE", H1_EV_H1C_RECV, conn, h1s);
}
if (h1c->flags & (H1C_F_ERR_PENDING|H1C_F_ERROR)) {
se_fl_set_error(h1s->sd);
TRACE_STATE("report (ERR_PENDING|ERROR) to SE", H1_EV_H1C_RECV, conn, h1s);
}
h1_alert(h1s);
TRACE_DEVEL("waiting to release the SC before releasing the connection", H1_EV_H1C_WAKE);
}
else {
h1_release(h1c);
TRACE_DEVEL("leaving after releasing the connection", H1_EV_H1C_WAKE);
}
return -1;
}
struct task *h1_io_cb(struct task *t, void *ctx, unsigned int state)
{
struct connection *conn;
struct tasklet *tl = (struct tasklet *)t;
int conn_in_list;
struct h1c *h1c = ctx;
int ret = 0;
if (state & TASK_F_USR1) {
/* the tasklet was idling on an idle connection, it might have
* been stolen, let's be careful!
*/
HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
if (tl->context == NULL) {
/* The connection has been taken over by another thread,
* we're no longer responsible for it, so just free the
* tasklet, and do nothing.
*/
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
tasklet_free(tl);
return NULL;
}
conn = h1c->conn;
TRACE_POINT(H1_EV_H1C_WAKE, conn);
/* Remove the connection from the list, to be sure nobody attempts
* to use it while we handle the I/O events
*/
conn_in_list = conn->flags & CO_FL_LIST_MASK;
if (conn_in_list)
conn_delete_from_tree(conn);
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
} else {
/* we're certain the connection was not in an idle list */
conn = h1c->conn;
TRACE_ENTER(H1_EV_H1C_WAKE, conn);
conn_in_list = 0;
}
if (!(h1c->wait_event.events & SUB_RETRY_SEND))
ret = h1_send(h1c);
if (!(h1c->wait_event.events & SUB_RETRY_RECV))
ret |= h1_recv(h1c);
if (ret || b_data(&h1c->ibuf))
ret = h1_process(h1c);
/* If we were in an idle list, we want to add it back into it,
* unless h1_process() returned -1, which mean it has destroyed
* the connection (testing !ret is enough, if h1_process() wasn't
* called then ret will be 0 anyway.
*/
if (ret < 0)
t = NULL;
if (!ret && conn_in_list) {
struct server *srv = objt_server(conn->target);
HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
_srv_add_idle(srv, conn, conn_in_list == CO_FL_SAFE_LIST);
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
}
return t;
}
static int h1_wake(struct connection *conn)
{
struct h1c *h1c = conn->ctx;
int ret;
TRACE_POINT(H1_EV_H1C_WAKE, conn);
h1_send(h1c);
ret = h1_process(h1c);
if (ret == 0) {
struct h1s *h1s = h1c->h1s;
if (h1c->state == H1_CS_UPGRADING || h1c->state == H1_CS_RUNNING)
h1_alert(h1s);
}
return ret;
}
/* Connection timeout management. The principle is that if there's no receipt
* nor sending for a certain amount of time, the connection is closed.
*/
struct task *h1_timeout_task(struct task *t, void *context, unsigned int state)
{
struct h1c *h1c = context;
int expired = tick_is_expired(t->expire, now_ms);
TRACE_ENTER(H1_EV_H1C_WAKE, h1c ? h1c->conn : NULL);
if (h1c) {
/* Make sure nobody stole the connection from us */
HA_SPIN_LOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
/* Somebody already stole the connection from us, so we should not
* free it, we just have to free the task.
*/
if (!t->context) {
h1c = NULL;
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
goto do_leave;
}
if (!expired) {
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
TRACE_DEVEL("leaving (not expired)", H1_EV_H1C_WAKE, h1c->conn, h1c->h1s);
return t;
}
/* If a stream connector is still attached and ready to the mux, wait for the
* stream's timeout
*/
if (h1c->state == H1_CS_RUNNING) {
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
t->expire = TICK_ETERNITY;
TRACE_DEVEL("leaving (SC still attached)", H1_EV_H1C_WAKE, h1c->conn, h1c->h1s);
return t;
}
/* Try to send an error to the client */
if (h1c->state != H1_CS_CLOSING && !(h1c->flags & (H1C_F_IS_BACK|H1C_F_ERROR|H1C_F_ABRT_PENDING))) {
TRACE_DEVEL("timeout error detected", H1_EV_H1C_WAKE|H1_EV_H1C_ERR, h1c->conn, h1c->h1s);
if (h1_handle_req_tout(h1c))
h1_send(h1c);
if (b_data(&h1c->obuf) || (h1c->flags & H1C_F_ABRT_PENDING)) {
h1_refresh_timeout(h1c);
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
return t;
}
}
if (h1c->h1s && !se_fl_test(h1c->h1s->sd, SE_FL_ORPHAN)) {
/* Don't release the H1 connection right now, we must destroy the
* attached SC first. */
se_fl_set(h1c->h1s->sd, SE_FL_EOS | SE_FL_ERROR);
h1_alert(h1c->h1s);
h1_refresh_timeout(h1c);
HA_SPIN_UNLOCK(OTHER_LOCK, &idle_conns[tid].idle_conns_lock);
TRACE_DEVEL("waiting to release the SC before releasing the connection", H1_EV_H1C_WAKE);
return t;
}
/* We're about to destroy the connection, so make sure nobody attempts
* to steal it from us.
*/
if (h1c->conn->flags & CO_FL_LIST_MASK)
conn_delete_from_tree(h1c->conn);
HA_SPIN_UNLOCK(IDLE_CONNS_LOCK, &idle_conns[tid].idle_conns_lock);
}
do_leave:
task_destroy(t);
if (!h1c) {
/* resources were already deleted */
TRACE_DEVEL("leaving (not more h1c)", H1_EV_H1C_WAKE);
return NULL;
}
h1c->task = NULL;
h1_release(h1c);
TRACE_LEAVE(H1_EV_H1C_WAKE);
return NULL;
}
/*******************************************/
/* functions below are used by the streams */
/*******************************************/
/*
* Attach a new stream to a connection
* (Used for outgoing connections)
*/
static int h1_attach(struct connection *conn, struct sedesc *sd, struct session *sess)
{
struct h1c *h1c = conn->ctx;
struct h1s *h1s;
/* this connection is no more idle (if it was at all) */
h1c->flags &= ~H1C_F_SILENT_SHUT;
TRACE_ENTER(H1_EV_STRM_NEW, conn);
if (h1c->flags & (H1C_F_ERR_PENDING|H1C_F_ERROR)) {
TRACE_ERROR("h1c on error", H1_EV_STRM_NEW|H1_EV_STRM_END|H1_EV_STRM_ERR, conn);
goto err;
}
h1s = h1c_bck_stream_new(h1c, sd->sc, sess);
if (h1s == NULL) {
TRACE_ERROR("h1s creation failure", H1_EV_STRM_NEW|H1_EV_STRM_END|H1_EV_STRM_ERR, conn);
goto err;
}
/* the connection is not idle anymore, let's mark this */
HA_ATOMIC_AND(&h1c->wait_event.tasklet->state, ~TASK_F_USR1);
xprt_set_used(conn, conn->xprt, conn->xprt_ctx);
TRACE_LEAVE(H1_EV_STRM_NEW, conn, h1s);
return 0;
err:
TRACE_DEVEL("leaving on error", H1_EV_STRM_NEW|H1_EV_STRM_END|H1_EV_STRM_ERR, conn);
return -1;
}
/* Retrieves a valid stream connector from this connection, or returns NULL.
* For this mux, it's easy as we can only store a single stream connector.
*/
static struct stconn *h1_get_first_sc(const struct connection *conn)
{
struct h1c *h1c = conn->ctx;
struct h1s *h1s = h1c->h1s;
if (h1s)
return h1s_sc(h1s);
return NULL;
}
static void h1_destroy(void *ctx)
{
struct h1c *h1c = ctx;
TRACE_POINT(H1_EV_H1C_END, h1c->conn);
if (!h1c->h1s || h1c->conn->ctx != h1c)
h1_release(h1c);
}
/*
* Detach the stream from the connection and possibly release the connection.
*/
static void h1_detach(struct sedesc *sd)
{
struct h1s *h1s = sd->se;
struct h1c *h1c;
TRACE_ENTER(H1_EV_STRM_END, h1s ? h1s->h1c->conn : NULL, h1s);
if (!h1s) {
TRACE_LEAVE(H1_EV_STRM_END);
return;
}
h1c = h1s->h1c;
if (h1c->state == H1_CS_RUNNING && !(h1c->flags & H1C_F_IS_BACK) && h1s->req.state != H1_MSG_DONE) {
h1c->state = H1_CS_DRAINING;
TRACE_DEVEL("Deferring H1S destroy to drain message", H1_EV_STRM_END, h1s->h1c->conn, h1s);
/* If we have a pending data, process it immediately or
* subscribe for reads waiting for new data
*/
if (unlikely(b_data(&h1c->ibuf))) {
if (h1_process(h1c) == -1)
goto end;
}
else
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
h1_set_idle_expiration(h1c);
h1_refresh_timeout(h1c);
}
else
h1s_finish_detach(h1s);
end:
TRACE_LEAVE(H1_EV_STRM_END);
}
static void h1_shut(struct stconn *sc, enum se_shut_mode mode, struct se_abort_info *reason)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c;
if (!h1s || !(mode & (SE_SHW_SILENT|SE_SHW_NORMAL)))
return;
h1c = h1s->h1c;
TRACE_ENTER(H1_EV_STRM_SHUT, h1c->conn, h1s, 0, (size_t[]){mode});
if (!h1s_must_shut_conn(h1s))
goto end;
do_shutw:
h1_close(h1c);
if (mode & SE_SHW_NORMAL)
h1c->flags |= H1C_F_SILENT_SHUT;
if (!b_data(&h1c->obuf))
h1_shutw_conn(h1c->conn);
end:
TRACE_LEAVE(H1_EV_STRM_SHUT, h1c->conn, h1s);
}
static void h1_shutw_conn(struct connection *conn)
{
struct h1c *h1c = conn->ctx;
TRACE_ENTER(H1_EV_H1C_END, conn);
h1_close(h1c);
if (conn->flags & CO_FL_SOCK_WR_SH)
return;
conn_xprt_shutw(conn);
conn_sock_shutw(conn, !(h1c->flags & H1C_F_SILENT_SHUT));
if (h1c->wait_event.tasklet && !h1c->wait_event.events)
tasklet_wakeup(h1c->wait_event.tasklet);
TRACE_LEAVE(H1_EV_H1C_END, conn);
}
/* Called from the upper layer, to unsubscribe <es> from events <event_type>
* The <es> pointer is not allowed to differ from the one passed to the
* subscribe() call. It always returns zero.
*/
static int h1_unsubscribe(struct stconn *sc, int event_type, struct wait_event *es)
{
struct h1s *h1s = __sc_mux_strm(sc);
if (!h1s)
return 0;
BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
BUG_ON(h1s->subs && h1s->subs != es);
es->events &= ~event_type;
if (!es->events)
h1s->subs = NULL;
if (event_type & SUB_RETRY_RECV)
TRACE_DEVEL("unsubscribe(recv)", H1_EV_STRM_RECV, h1s->h1c->conn, h1s);
if (event_type & SUB_RETRY_SEND)
TRACE_DEVEL("unsubscribe(send)", H1_EV_STRM_SEND, h1s->h1c->conn, h1s);
return 0;
}
/* Called from the upper layer, to subscribe <es> to events <event_type>. The
* event subscriber <es> is not allowed to change from a previous call as long
* as at least one event is still subscribed. The <event_type> must only be a
* combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0, unless
* the stream connector <sc> was already detached, in which case it will return
* -1.
*/
static int h1_subscribe(struct stconn *sc, int event_type, struct wait_event *es)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c;
if (!h1s)
return -1;
BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV));
BUG_ON(h1s->subs && h1s->subs != es);
es->events |= event_type;
h1s->subs = es;
if (event_type & SUB_RETRY_RECV)
TRACE_DEVEL("subscribe(recv)", H1_EV_STRM_RECV, h1s->h1c->conn, h1s);
if (event_type & SUB_RETRY_SEND) {
TRACE_DEVEL("subscribe(send)", H1_EV_STRM_SEND, h1s->h1c->conn, h1s);
/*
* If the stconn attempts to subscribe, and the
* mux isn't subscribed to the connection, then it
* probably means the connection wasn't established
* yet, so we have to subscribe.
*/
h1c = h1s->h1c;
if (!(h1c->wait_event.events & SUB_RETRY_SEND))
h1c->conn->xprt->subscribe(h1c->conn,
h1c->conn->xprt_ctx,
SUB_RETRY_SEND,
&h1c->wait_event);
}
return 0;
}
/* Called from the upper layer, to receive data.
*
* The caller is responsible for defragmenting <buf> if necessary. But <flags>
* must be tested to know the calling context. If CO_RFL_BUF_FLUSH is set, it
* means the caller wants to flush input data (from the mux buffer and the
* channel buffer) to be able to use fast-forwarding.
* If CO_RFL_KEEP_RECV is set, the mux must always subscribe for read
* events before giving back. CO_RFL_BUF_WET is set if <buf> is congested with
* data scheduled for leaving soon. CO_RFL_BUF_NOT_STUCK is set to instruct the
* mux it may optimize the data copy to <buf> if necessary. Otherwise, it should
* copy as much data as possible.
*/
static size_t h1_rcv_buf(struct stconn *sc, struct buffer *buf, size_t count, int flags)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c = h1s->h1c;
struct h1m *h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->req : &h1s->res);
size_t ret = 0;
TRACE_ENTER(H1_EV_STRM_RECV, h1c->conn, h1s, 0, (size_t[]){count});
/* Do nothing for now if not RUNNING (implies UPGRADING) */
if (h1c->state < H1_CS_RUNNING) {
TRACE_DEVEL("h1c not ready yet", H1_EV_H1C_RECV|H1_EV_H1C_BLK, h1c->conn);
goto end;
}
if (!(h1c->flags & H1C_F_IN_ALLOC))
ret = h1_process_demux(h1c, buf, count);
else
TRACE_DEVEL("h1c ibuf not allocated", H1_EV_H1C_RECV|H1_EV_H1C_BLK, h1c->conn);
if ((flags & CO_RFL_BUF_FLUSH) && se_fl_test(h1s->sd, SE_FL_MAY_FASTFWD_PROD)) {
h1c->flags |= H1C_F_WANT_FASTFWD;
TRACE_STATE("Block xprt rcv_buf to flush stream's buffer (want_fastfwd)", H1_EV_STRM_RECV, h1c->conn, h1s);
}
else {
if (((flags & CO_RFL_KEEP_RECV) || (h1m->state != H1_MSG_DONE)) && !(h1c->wait_event.events & SUB_RETRY_RECV))
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
end:
TRACE_LEAVE(H1_EV_STRM_RECV, h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
/* Called from the upper layer, to send data */
static size_t h1_snd_buf(struct stconn *sc, struct buffer *buf, size_t count, int flags)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c;
size_t total = 0;
if (!h1s)
return 0;
h1c = h1s->h1c;
TRACE_ENTER(H1_EV_STRM_SEND, h1c->conn, h1s, 0, (size_t[]){count});
/* If we're not connected yet, or we're waiting for a handshake, stop
* now, as we don't want to remove everything from the channel buffer
* before we're sure we can send it.
*/
if (h1c->conn->flags & CO_FL_WAIT_XPRT) {
TRACE_LEAVE(H1_EV_STRM_SEND, h1c->conn, h1s);
return 0;
}
if (h1c->flags & (H1C_F_ERR_PENDING|H1C_F_ERROR)) {
se_fl_set_error(h1s->sd);
TRACE_ERROR("H1C on error, leaving in error", H1_EV_STRM_SEND|H1_EV_H1C_ERR|H1_EV_H1S_ERR|H1_EV_STRM_ERR, h1c->conn, h1s);
return 0;
}
/* Inherit some flags from the upper layer */
h1c->flags &= ~(H1C_F_CO_MSG_MORE|H1C_F_CO_STREAMER);
if (flags & CO_SFL_MSG_MORE)
h1c->flags |= H1C_F_CO_MSG_MORE;
if (flags & CO_SFL_STREAMER)
h1c->flags |= H1C_F_CO_STREAMER;
while (count) {
size_t ret = 0;
if (!(h1c->flags & (H1C_F_OUT_FULL|H1C_F_OUT_ALLOC)))
ret = h1_process_mux(h1c, buf, count);
else
TRACE_DEVEL("h1c obuf not allocated", H1_EV_STRM_SEND|H1_EV_H1S_BLK, h1c->conn, h1s);
if (!ret)
break;
if ((count - ret) > 0)
h1c->flags |= H1C_F_CO_MSG_MORE;
total += ret;
count -= ret;
if ((h1c->wait_event.events & SUB_RETRY_SEND) || !h1_send(h1c))
break;
if ((h1c->conn->flags & (CO_FL_ERROR|CO_FL_SOCK_WR_SH)))
break;
}
if (h1c->flags & (H1C_F_ERR_PENDING|H1C_F_ERROR)) {
// FIXME: following test was removed :
// ((h1c->conn->flags & CO_FL_ERROR) && (se_fl_test(h1s->sd, SE_FL_EOI | SE_FL_EOS) || !b_data(&h1c->ibuf)))) {
se_fl_set_error(h1s->sd);
TRACE_ERROR("reporting error to the app-layer stream", H1_EV_STRM_SEND|H1_EV_H1S_ERR|H1_EV_STRM_ERR, h1c->conn, h1s);
}
h1_refresh_timeout(h1c);
TRACE_LEAVE(H1_EV_STRM_SEND, h1c->conn, h1s, 0, (size_t[]){total});
return total;
}
static inline struct sedesc *h1s_opposite_sd(struct h1s *h1s)
{
struct xref *peer;
struct sedesc *sdo;
peer = xref_get_peer_and_lock(&h1s->sd->xref);
if (!peer)
return NULL;
sdo = container_of(peer, struct sedesc, xref);
xref_unlock(&h1s->sd->xref, peer);
return sdo;
}
static size_t h1_nego_ff(struct stconn *sc, struct buffer *input, size_t count, unsigned int flags)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c = h1s->h1c;
struct h1m *h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->res : &h1s->req);
size_t sz, offset = 0, ret = 0;
TRACE_ENTER(H1_EV_STRM_SEND, h1c->conn, h1s, 0, (size_t[]){count});
if (global.tune.no_zero_copy_fwd & NO_ZERO_COPY_FWD_H1_SND) {
h1s->sd->iobuf.flags |= IOBUF_FL_NO_FF;
goto out;
}
if ((!(h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_REQ)) ||
((h1m->flags & H1_MF_RESP) && (h1s->flags & H1S_F_BODYLESS_RESP))) {
TRACE_STATE("Bodyless message, disable fastfwd", H1_EV_STRM_SEND|H1_EV_STRM_ERR, h1c->conn, h1s);
h1s->sd->iobuf.flags |= IOBUF_FL_NO_FF;
goto out;
}
if (h1m->flags & H1_MF_CLEN) {
if ((flags & NEGO_FF_FL_EXACT_SIZE) && count > h1m->curr_len) {
TRACE_ERROR("more payload than announced", H1_EV_STRM_SEND|H1_EV_STRM_ERR, h1c->conn, h1s);
h1s->sd->iobuf.flags |= IOBUF_FL_NO_FF;
goto out;
}
}
else if (h1m->flags & H1_MF_CHNK) {
if (h1m->curr_len) {
BUG_ON(h1m->state != H1_MSG_DATA);
if (count > h1m->curr_len) {
if ((flags & NEGO_FF_FL_EXACT_SIZE) && count > h1m->curr_len) {
TRACE_ERROR("chunk bigger than announced", H1_EV_STRM_SEND|H1_EV_STRM_ERR, h1c->conn, h1s);
h1s->sd->iobuf.flags |= IOBUF_FL_NO_FF;
goto out;
}
count = h1m->curr_len;
}
}
else {
BUG_ON(h1m->state != H1_MSG_CHUNK_CRLF && h1m->state != H1_MSG_CHUNK_SIZE);
if (flags & NEGO_FF_FL_EXACT_SIZE) {
if (!h1_make_chunk(h1s, h1m, count)) {
h1s->sd->iobuf.flags |= IOBUF_FL_FF_BLOCKED;
goto out;
}
h1m->curr_len = count;
}
else {
/* The producer does not know the chunk size, thus this will be emitted at the
* end, in done_ff(). So splicing cannot be used (see TODO below).
* We will reserve 10 bytes to handle at most 4Go chunk !
* (<8-bytes SIZE><CRLF><CHUNK-DATA>)
*/
if (count > MAX_RANGE(unsigned int))
count = MAX_RANGE(unsigned int);
offset = 10;
/* Add 2 more bytes to finish the previous chunk */
if (h1m->state == H1_MSG_CHUNK_CRLF)
offset += 2;
goto no_splicing;
}
}
}
/* Use kernel splicing if it is supported by the sender and if there
* are no input data _AND_ no output data.
*
* TODO: It may be good to add a flag to send obuf data first if any,
* and then data in pipe, or the opposite. For now, it is not
* supported to mix data.
*/
if (!b_data(input) && !b_data(&h1c->obuf) && (flags & NEGO_FF_FL_MAY_SPLICE)) {
#if defined(USE_LINUX_SPLICE)
if (h1c->conn->xprt->snd_pipe && (h1s->sd->iobuf.pipe || (pipes_used < global.maxpipes && (h1s->sd->iobuf.pipe = get_pipe())))) {
h1s->sd->iobuf.offset = 0;
h1s->sd->iobuf.data = 0;
ret = count;
goto out;
}
#endif
h1s->sd->iobuf.flags |= IOBUF_FL_NO_SPLICING;
TRACE_DEVEL("Unable to allocate pipe for splicing, fallback to buffer", H1_EV_STRM_SEND, h1c->conn, h1s);
}
no_splicing:
if (!h1_get_obuf(h1c)) {
h1s->sd->iobuf.flags |= IOBUF_FL_FF_BLOCKED;
TRACE_STATE("waiting for opposite h1c obuf allocation", H1_EV_STRM_SEND|H1_EV_H1S_BLK, h1c->conn, h1s);
goto out;
}
if (b_space_wraps(&h1c->obuf))
b_slow_realign(&h1c->obuf, trash.area, b_data(&h1c->obuf));
if (b_contig_space(&h1c->obuf) <= offset) {
h1c->flags |= H1C_F_OUT_FULL;
h1s->sd->iobuf.flags |= IOBUF_FL_FF_BLOCKED;
TRACE_STATE("output buffer full", H1_EV_STRM_SEND|H1_EV_H1S_BLK, h1c->conn, h1s);
goto out;
}
/* Cannot forward more than available room in output buffer */
sz = b_contig_space(&h1c->obuf) - offset;
if (count > sz)
count = sz;
h1s->sd->iobuf.buf = &h1c->obuf;
h1s->sd->iobuf.offset = offset;
h1s->sd->iobuf.data = 0;
/* forward remaining input data */
if (b_data(input)) {
size_t xfer = count;
if (xfer > b_data(input))
xfer = b_data(input);
h1s->sd->iobuf.data = b_xfer(&h1c->obuf, input, xfer);
/* Cannot forward more data, wait for room */
if (b_data(input))
goto out;
}
ret = count - h1s->sd->iobuf.data;
out:
TRACE_LEAVE(H1_EV_STRM_SEND, h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
static size_t h1_done_ff(struct stconn *sc)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c = h1s->h1c;
struct h1m *h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->res : &h1s->req);
struct sedesc *sd = h1s->sd;
size_t total = 0;
TRACE_ENTER(H1_EV_STRM_SEND, h1c->conn, h1s);
#if defined(USE_LINUX_SPLICE)
if (sd->iobuf.pipe) {
total = h1c->conn->xprt->snd_pipe(h1c->conn, h1c->conn->xprt_ctx, sd->iobuf.pipe, sd->iobuf.pipe->data);
if (total > 0)
HA_ATOMIC_ADD(&h1c->px_counters->spliced_bytes_out, total);
if (!sd->iobuf.pipe->data) {
put_pipe(sd->iobuf.pipe);
sd->iobuf.pipe = NULL;
}
goto out;
}
#endif
if (!sd->iobuf.pipe) {
if (b_room(&h1c->obuf) == sd->iobuf.offset)
h1c->flags |= H1C_F_OUT_FULL;
if (sd->iobuf.data && sd->iobuf.offset) {
struct buffer buf = b_make(b_orig(&h1c->obuf), b_size(&h1c->obuf),
b_peek_ofs(&h1c->obuf, b_data(&h1c->obuf) - sd->iobuf.data + sd->iobuf.offset),
sd->iobuf.data);
h1_prepend_chunk_size(&buf, sd->iobuf.data, sd->iobuf.offset - ((h1m->state == H1_MSG_CHUNK_CRLF) ? 2 : 0));
if (h1m->state == H1_MSG_CHUNK_CRLF)
h1_prepend_chunk_crlf(&buf);
b_add(&h1c->obuf, sd->iobuf.offset);
h1m->state = H1_MSG_CHUNK_CRLF;
}
total = sd->iobuf.data;
sd->iobuf.buf = NULL;
sd->iobuf.offset = 0;
sd->iobuf.data = 0;
if (sd->iobuf.flags & IOBUF_FL_EOI)
h1c->flags &= ~H1C_F_CO_MSG_MORE;
/* Perform a synchronous send but in all cases, consider
* everything was already sent from the SC point of view.
*/
h1_send(h1c);
}
out:
if (h1m->curr_len)
h1m->curr_len -= total;
if (!h1m->curr_len && (h1m->flags & H1_MF_CLEN))
h1m->state = ((sd->iobuf.flags & IOBUF_FL_EOI) ? H1_MSG_DONE : H1_MSG_TRAILERS);
else if (!h1m->curr_len && (h1m->flags & H1_MF_CHNK)) {
if (h1m->state == H1_MSG_DATA)
h1m->state = H1_MSG_CHUNK_CRLF;
}
HA_ATOMIC_ADD(&h1c->px_counters->bytes_out, total);
// TODO: should we call h1_process() instead ?
if (h1c->conn->flags & CO_FL_ERROR) {
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_ERR_PENDING;
if (h1c->flags & H1C_F_EOS)
h1c->flags |= H1C_F_ERROR;
else if (!(h1c->wait_event.events & SUB_RETRY_RECV)) {
/* EOS not seen, so subscribe for reads to be able to
* catch the error on the reading path. It is especially
* important if EOI was reached.
*/
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
se_fl_set_error(h1s->sd);
TRACE_DEVEL("connection error", H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
}
TRACE_LEAVE(H1_EV_STRM_RECV, h1c->conn, h1s, 0, (size_t[]){total});
return total;
}
static int h1_fastfwd(struct stconn *sc, unsigned int count, unsigned int flags)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c = h1s->h1c;
struct h1m *h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->req : &h1s->res);
struct sedesc *sdo = NULL;
size_t total = 0, try = 0;
unsigned int nego_flags = NEGO_FF_FL_NONE;
int ret = 0;
TRACE_ENTER(H1_EV_STRM_RECV, h1c->conn, h1s, 0, (size_t[]){count});
if (h1m->state != H1_MSG_DATA && h1m->state != H1_MSG_TUNNEL) {
h1c->flags &= ~H1C_F_WANT_FASTFWD;
TRACE_STATE("Cannot fast-forwad data now !(msg_data|msg_tunnel)", H1_EV_STRM_RECV, h1c->conn, h1s);
goto end;
}
se_fl_clr(h1s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
h1c->conn->flags &= ~CO_FL_WAIT_ROOM;
h1c->flags |= H1C_F_WANT_FASTFWD;
if (h1c->flags & (H1C_F_EOS|H1C_F_ERROR)) {
h1c->flags &= ~H1C_F_WANT_FASTFWD;
TRACE_DEVEL("leaving on (EOS|ERROR)", H1_EV_STRM_RECV, h1c->conn, h1s);
goto end;
}
sdo = h1s_opposite_sd(h1s);
if (!sdo) {
TRACE_STATE("Opposite endpoint not available yet", H1_EV_STRM_RECV, h1c->conn, h1s);
goto out;
}
retry:
ret = 0;
if (h1m->state == H1_MSG_DATA && (h1m->flags & (H1_MF_CHNK|H1_MF_CLEN)) && count > h1m->curr_len) {
flags |= NEGO_FF_FL_EXACT_SIZE;
count = h1m->curr_len;
}
if (h1c->conn->xprt->rcv_pipe && !!(flags & CO_RFL_MAY_SPLICE) && !(sdo->iobuf.flags & IOBUF_FL_NO_SPLICING))
nego_flags |= NEGO_FF_FL_MAY_SPLICE;
try = se_nego_ff(sdo, &h1c->ibuf, count, nego_flags);
if (b_room(&h1c->ibuf) && (h1c->flags & H1C_F_IN_FULL)) {
h1c->flags &= ~H1C_F_IN_FULL;
TRACE_STATE("h1c ibuf not full anymore", H1_EV_STRM_RECV|H1_EV_H1C_BLK);
}
if (!b_data(&h1c->ibuf))
h1_release_buf(h1c, &h1c->ibuf);
if (sdo->iobuf.flags & IOBUF_FL_NO_FF) {
/* Fast forwarding is not supported by the consumer */
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_CANT_FASTFWD;
TRACE_DEVEL("Fast-forwarding not supported by opposite endpoint, disable it", H1_EV_STRM_RECV, h1c->conn, h1s);
goto end;
}
if (sdo->iobuf.flags & IOBUF_FL_FF_BLOCKED) {
se_fl_set(h1s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
TRACE_STATE("waiting for more room", H1_EV_STRM_RECV|H1_EV_H1S_ERR, h1c->conn, h1s);
goto out;
}
total += sdo->iobuf.data;
count -= sdo->iobuf.data;
#if defined(USE_LINUX_SPLICE)
if (sdo->iobuf.pipe) {
/* Here, not data was xferred */
ret = h1c->conn->xprt->rcv_pipe(h1c->conn, h1c->conn->xprt_ctx, sdo->iobuf.pipe, try);
if (ret < 0) {
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_CANT_FASTFWD;
TRACE_ERROR("Error when trying to fast-forward data, disable it and abort",
H1_EV_STRM_RECV|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
BUG_ON(sdo->iobuf.pipe->data);
put_pipe(sdo->iobuf.pipe);
sdo->iobuf.pipe = NULL;
goto end;
}
total += ret;
count -= ret;
if (!ret) {
TRACE_STATE("failed to receive data, subscribing", H1_EV_STRM_RECV, h1c->conn);
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
HA_ATOMIC_ADD(&h1c->px_counters->spliced_bytes_in, ret);
}
#endif
if (!sdo->iobuf.pipe) {
b_add(sdo->iobuf.buf, sdo->iobuf.offset);
ret = h1c->conn->xprt->rcv_buf(h1c->conn, h1c->conn->xprt_ctx, sdo->iobuf.buf, try, flags);
if (ret < try) {
TRACE_STATE("failed to receive data, subscribing", H1_EV_STRM_RECV, h1c->conn);
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
b_sub(sdo->iobuf.buf, sdo->iobuf.offset);
total += ret;
count -= ret;
sdo->iobuf.data += ret;
}
/* Till now, we forwarded less than a buffer, we can immediately retry
* to fast-forward more data. Instruct the consumer it is an interim
* fast-forward. It is of course only possible if there is still data to
* fast-forward (count > 0), if the previous attempt was a full success
* (0 > ret == try) and if we are not splicing (iobuf.buf != NULL).
*/
if (ret > 0 && ret == try && count && sdo->iobuf.buf && total < b_size(sdo->iobuf.buf)) {
sdo->iobuf.flags |= IOBUF_FL_INTERIM_FF;
se_done_ff(sdo);
goto retry;
}
out:
if (h1m->state == H1_MSG_DATA && (h1m->flags & (H1_MF_CHNK|H1_MF_CLEN))) {
if (total > h1m->curr_len) {
h1s->flags |= H1S_F_PARSING_ERROR;
se_fl_set(h1s->sd, SE_FL_ERROR);
TRACE_ERROR("too much payload, more than announced",
H1_EV_STRM_RECV|H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
goto end;
}
h1m->curr_len -= total;
if (!h1m->curr_len) {
if (h1m->flags & H1_MF_CLEN) {
h1m->state = H1_MSG_DONE;
se_fl_set(h1s->sd, SE_FL_EOI); /* TODO: this line is tricky and must be evaluated first
* Its purpose is to avoid to set CO_SFL_MSG_MORE on the
* next calls to ->complete_fastfwd().
*/
}
else
h1m->state = H1_MSG_CHUNK_CRLF;
h1c->flags &= ~H1C_F_WANT_FASTFWD;
if (!(h1c->flags & H1C_F_IS_BACK)) {
/* The request was fully received. It means the H1S now
* expect data from the opposite side
*/
se_expect_data(h1s->sd);
}
TRACE_STATE("payload fully received", H1_EV_STRM_RECV, h1c->conn, h1s);
}
}
if (conn_xprt_read0_pending(h1c->conn)) {
se_fl_set(h1s->sd, SE_FL_EOS);
TRACE_STATE("report EOS to SE", H1_EV_STRM_RECV, h1c->conn, h1s);
if (h1m->state >= H1_MSG_DONE || !(h1m->flags & H1_MF_XFER_LEN)) {
/* DONE or TUNNEL or SHUTR without XFER_LEN, set
* EOI on the stream connector */
se_fl_set(h1s->sd, SE_FL_EOI);
TRACE_STATE("report EOI to SE", H1_EV_STRM_RECV, h1c->conn, h1s);
}
else {
se_fl_set(h1s->sd, SE_FL_ERROR);
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_ERROR;
TRACE_ERROR("message aborted, set error on SC", H1_EV_STRM_RECV|H1_EV_H1S_ERR, h1c->conn, h1s);
}
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_EOS;
TRACE_STATE("Allow xprt rcv_buf on read0", H1_EV_STRM_RECV, h1c->conn, h1s);
}
if (h1c->conn->flags & CO_FL_ERROR) {
se_fl_set(h1s->sd, SE_FL_ERROR);
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_ERROR;
TRACE_DEVEL("connection error", H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
}
sdo->iobuf.flags &= ~IOBUF_FL_INTERIM_FF;
if (se_fl_test(h1s->sd, SE_FL_EOI)) {
sdo->iobuf.flags |= IOBUF_FL_EOI; /* TODO: it may be good to have a flag to be sure we can
* forward the EOI the to consumer side
*/
}
se_done_ff(sdo);
ret = total;
HA_ATOMIC_ADD(&h1c->px_counters->bytes_in, total);
if (sdo->iobuf.pipe) {
se_fl_set(h1s->sd, SE_FL_RCV_MORE | SE_FL_WANT_ROOM);
}
end:
if (!(h1c->flags & H1C_F_WANT_FASTFWD)) {
TRACE_STATE("notify the mux can't use fast-forward anymore", H1_EV_STRM_RECV, h1c->conn, h1s);
se_fl_clr(h1s->sd, SE_FL_MAY_FASTFWD_PROD);
if (!(h1c->wait_event.events & SUB_RETRY_RECV)) {
TRACE_STATE("restart receiving data, subscribing", H1_EV_STRM_RECV, h1c->conn, h1s);
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
}
TRACE_LEAVE(H1_EV_STRM_RECV, h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
static int h1_resume_fastfwd(struct stconn *sc, unsigned int flags)
{
struct h1s *h1s = __sc_mux_strm(sc);
struct h1c *h1c = h1s->h1c;
int ret = 0;
TRACE_ENTER(H1_EV_STRM_SEND, h1c->conn, h1s, 0, (size_t[]){flags});
#if defined(USE_LINUX_SPLICE)
if (h1s->sd->iobuf.pipe) {
struct h1m *h1m = (!(h1c->flags & H1C_F_IS_BACK) ? &h1s->res : &h1s->req);
struct sedesc *sd = h1s->sd;
ret = h1c->conn->xprt->snd_pipe(h1c->conn, h1c->conn->xprt_ctx, sd->iobuf.pipe, sd->iobuf.pipe->data);
if (ret > 0)
HA_ATOMIC_ADD(&h1c->px_counters->spliced_bytes_out, ret);
if (!sd->iobuf.pipe->data) {
put_pipe(sd->iobuf.pipe);
sd->iobuf.pipe = NULL;
}
h1m->curr_len -= ret;
if (!h1m->curr_len && (h1m->flags & H1_MF_CLEN))
h1m->state = H1_MSG_DONE;
else if (!h1m->curr_len && (h1m->flags & H1_MF_CHNK)) {
if (h1m->state == H1_MSG_DATA)
h1m->state = H1_MSG_CHUNK_CRLF;
}
HA_ATOMIC_ADD(&h1c->px_counters->bytes_out, ret);
}
#endif
// TODO: should we call h1_process() instead ?
if (h1c->conn->flags & CO_FL_ERROR) {
h1c->flags = (h1c->flags & ~H1C_F_WANT_FASTFWD) | H1C_F_ERR_PENDING;
if (h1c->flags & H1C_F_EOS)
h1c->flags |= H1C_F_ERROR;
else if (!(h1c->wait_event.events & SUB_RETRY_RECV)) {
/* EOS not seen, so subscribe for reads to be able to
* catch the error on the reading path. It is especially
* important if EOI was reached.
*/
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
}
se_fl_set_error(h1s->sd);
TRACE_DEVEL("connection error", H1_EV_STRM_ERR|H1_EV_H1C_ERR|H1_EV_H1S_ERR, h1c->conn, h1s);
}
TRACE_LEAVE(H1_EV_STRM_RECV, h1c->conn, h1s, 0, (size_t[]){ret});
return ret;
}
static int h1_ctl(struct connection *conn, enum mux_ctl_type mux_ctl, void *output)
{
struct h1c *h1c = conn->ctx;
int ret = 0;
switch (mux_ctl) {
case MUX_CTL_STATUS:
if (!(conn->flags & CO_FL_WAIT_XPRT))
ret |= MUX_STATUS_READY;
return ret;
case MUX_CTL_EXIT_STATUS:
if (output)
*((int *)output) = h1c->errcode;
ret = (h1c->errcode == 408 ? MUX_ES_TOUT_ERR :
(h1c->errcode == 501 ? MUX_ES_NOTIMPL_ERR :
(h1c->errcode == 500 ? MUX_ES_INTERNAL_ERR :
((h1c->errcode >= 400 && h1c->errcode <= 499) ? MUX_ES_INVALID_ERR :
MUX_ES_SUCCESS))));
return ret;
case MUX_CTL_SUBS_RECV:
if (!(h1c->wait_event.events & SUB_RETRY_RECV))
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx, SUB_RETRY_RECV, &h1c->wait_event);
return 0;
case MUX_CTL_GET_NBSTRM:
return h1_used_streams(conn);
case MUX_CTL_GET_MAXSTRM:
return 1;
default:
return -1;
}
}
static int h1_sctl(struct stconn *sc, enum mux_sctl_type mux_sctl, void *output)
{
int ret = 0;
struct h1s *h1s = __sc_mux_strm(sc);
switch (mux_sctl) {
case MUX_SCTL_SID:
if (output)
*((int64_t *)output) = h1s->h1c->req_count;
return ret;
default:
return -1;
}
}
/* appends some info about connection <h1c> to buffer <msg>, or does nothing if
* <h1c> is NULL. Returns non-zero if the connection is considered suspicious.
* May emit multiple lines, each new one being prefixed with <pfx>, if <pfx> is
* not NULL, otherwise a single line is used.
*/
static int h1_dump_h1c_info(struct buffer *msg, struct h1c *h1c, const char *pfx)
{
int ret = 0;
if (!h1c)
return ret;
chunk_appendf(msg, " h1c.flg=0x%x .sub=%d .ibuf=%u@%p+%u/%u .obuf=%u@%p+%u/%u",
h1c->flags, h1c->wait_event.events,
(unsigned int)b_data(&h1c->ibuf), b_orig(&h1c->ibuf),
(unsigned int)b_head_ofs(&h1c->ibuf), (unsigned int)b_size(&h1c->ibuf),
(unsigned int)b_data(&h1c->obuf), b_orig(&h1c->obuf),
(unsigned int)b_head_ofs(&h1c->obuf), (unsigned int)b_size(&h1c->obuf));
chunk_appendf(msg, " .task=%p", h1c->task);
if (h1c->task) {
chunk_appendf(msg, " .exp=%s",
h1c->task->expire ? tick_is_expired(h1c->task->expire, now_ms) ? "<PAST>" :
human_time(TICKS_TO_MS(h1c->task->expire - now_ms), TICKS_TO_MS(1000)) : "<NEVER>");
}
return ret;
}
/* appends some info about stream <h1s> to buffer <msg>, or does nothing if
* <h1s> is NULL. Returns non-zero if the stream is considered suspicious. May
* emit multiple lines, each new one being prefixed with <pfx>, if <pfx> is not
* NULL, otherwise a single line is used.
*/
static int h1_dump_h1s_info(struct buffer *msg, const struct h1s *h1s, const char *pfx)
{
const char *method;
int ret = 0;
if (!h1s)
return ret;
if (h1s->meth < HTTP_METH_OTHER)
method = http_known_methods[h1s->meth].ptr;
else
method = "UNKNOWN";
chunk_appendf(msg, " h1s=%p h1s.flg=0x%x .sd.flg=0x%x .req.state=%s .res.state=%s",
h1s, h1s->flags, se_fl_get(h1s->sd),
h1m_state_str(h1s->req.state), h1m_state_str(h1s->res.state));
if (pfx)
chunk_appendf(msg, "\n%s", pfx);
chunk_appendf(msg, " .meth=%s status=%d",
method, h1s->status);
chunk_appendf(msg, " .sd.flg=0x%08x", se_fl_get(h1s->sd));
if (!se_fl_test(h1s->sd, SE_FL_ORPHAN))
chunk_appendf(msg, " .sc.flg=0x%08x .sc.app=%p",
h1s_sc(h1s)->flags, h1s_sc(h1s)->app);
if (pfx && h1s->subs)
chunk_appendf(msg, "\n%s", pfx);
chunk_appendf(msg, " .subs=%p", h1s->subs);
if (h1s->subs) {
chunk_appendf(msg, "(ev=%d tl=%p", h1s->subs->events, h1s->subs->tasklet);
chunk_appendf(msg, " tl.calls=%d tl.ctx=%p tl.fct=",
h1s->subs->tasklet->calls,
h1s->subs->tasklet->context);
if (h1s->subs->tasklet->calls >= 1000000)
ret = 1;
resolve_sym_name(msg, NULL, h1s->subs->tasklet->process);
chunk_appendf(msg, ")");
}
return ret;
}
/* for debugging with CLI's "show fd" command */
static int h1_show_fd(struct buffer *msg, struct connection *conn)
{
struct h1c *h1c = conn->ctx;
struct h1s *h1s = h1c->h1s;
int ret = 0;
ret |= h1_dump_h1c_info(msg, h1c, NULL);
if (h1s)
ret |= h1_dump_h1s_info(msg, h1s, NULL);
return ret;
}
/* for debugging with CLI's "show sess" command. May emit multiple lines, each
* new one being prefixed with <pfx>, if <pfx> is not NULL, otherwise a single
* line is used. Each field starts with a space so it's safe to print it after
* existing fields.
*/
static int h1_show_sd(struct buffer *msg, struct sedesc *sd, const char *pfx)
{
struct h1s *h1s = sd->se;
int ret = 0;
if (!h1s)
return ret;
ret |= h1_dump_h1s_info(msg, h1s, pfx);
if (pfx)
chunk_appendf(msg, "\n%s", pfx);
chunk_appendf(msg, " h1c=%p", h1s->h1c);
ret |= h1_dump_h1c_info(msg, h1s->h1c, pfx);
return ret;
}
/* Add an entry in the headers map. Returns -1 on error and 0 on success. */
static int add_hdr_case_adjust(const char *from, const char *to, char **err)
{
struct h1_hdr_entry *entry;
/* Be sure there is a non-empty <to> */
if (!strlen(to)) {
memprintf(err, "expect <to>");
return -1;
}
/* Be sure only the case differs between <from> and <to> */
if (strcasecmp(from, to) != 0) {
memprintf(err, "<from> and <to> must not differ except the case");
return -1;
}
/* Be sure <from> does not already existsin the tree */
if (ebis_lookup(&hdrs_map.map, from)) {
memprintf(err, "duplicate entry '%s'", from);
return -1;
}
/* Create the entry and insert it in the tree */
entry = malloc(sizeof(*entry));
if (!entry) {
memprintf(err, "out of memory");
return -1;
}
entry->node.key = strdup(from);
entry->name = ist(strdup(to));
if (!entry->node.key || !isttest(entry->name)) {
free(entry->node.key);
istfree(&entry->name);
free(entry);
memprintf(err, "out of memory");
return -1;
}
ebis_insert(&hdrs_map.map, &entry->node);
return 0;
}
/* Migrate the the connection to the current thread.
* Return 0 if successful, non-zero otherwise.
* Expected to be called with the old thread lock held.
*/
static int h1_takeover(struct connection *conn, int orig_tid, int release)
{
struct h1c *h1c = conn->ctx;
struct task *task;
struct task *new_task = NULL;
struct tasklet *new_tasklet = NULL;
/* Pre-allocate tasks so that we don't have to roll back after the xprt
* has been migrated.
*/
if (!release) {
/* If the connection is attached to a buffer_wait (extremely
* rare), it will be woken up at any instant by its own thread
* and we can't undo it anyway, so let's give up on this one.
* It's not interesting anyway since it's not usable right now.
*/
if (LIST_INLIST(&h1c->buf_wait.list))
goto fail;
new_task = task_new_here();
new_tasklet = tasklet_new();
if (!new_task || !new_tasklet)
goto fail;
}
if (fd_takeover(conn->handle.fd, conn) != 0)
goto fail;
if (conn->xprt->takeover && conn->xprt->takeover(conn, conn->xprt_ctx, orig_tid, release) != 0) {
/* We failed to takeover the xprt, even if the connection may
* still be valid, flag it as error'd, as we have already
* taken over the fd, and wake the tasklet, so that it will
* destroy it.
*/
conn->flags |= CO_FL_ERROR;
tasklet_wakeup_on(h1c->wait_event.tasklet, orig_tid);
goto fail;
}
if (h1c->wait_event.events)
h1c->conn->xprt->unsubscribe(h1c->conn, h1c->conn->xprt_ctx,
h1c->wait_event.events, &h1c->wait_event);
task = h1c->task;
if (task) {
/* only assign a task if there was already one, otherwise
* the preallocated new task will be released.
*/
task->context = NULL;
h1c->task = NULL;
__ha_barrier_store();
task_kill(task);
h1c->task = new_task;
new_task = NULL;
if (!release) {
h1c->task->process = h1_timeout_task;
h1c->task->context = h1c;
}
}
/* To let the tasklet know it should free itself, and do nothing else,
* set its context to NULL.
*/
h1c->wait_event.tasklet->context = NULL;
tasklet_wakeup_on(h1c->wait_event.tasklet, orig_tid);
h1c->wait_event.tasklet = new_tasklet;
if (!release) {
h1c->wait_event.tasklet->process = h1_io_cb;
h1c->wait_event.tasklet->context = h1c;
h1c->conn->xprt->subscribe(h1c->conn, h1c->conn->xprt_ctx,
SUB_RETRY_RECV, &h1c->wait_event);
}
if (release) {
/* we're being called for a server deletion and are running
* under thread isolation. That's the only way we can
* unregister a possible subscription of the original
* connection from its owner thread's queue, as this involves
* manipulating thread-unsafe areas. Note that it is not
* possible to just call b_dequeue() here as it would update
* the current thread's bufq_map and not the original one.
*/
BUG_ON(!thread_isolated());
if (LIST_INLIST(&h1c->buf_wait.list))
_b_dequeue(&h1c->buf_wait, orig_tid);
}
if (new_task)
__task_free(new_task);
return 0;
fail:
if (new_task)
__task_free(new_task);
tasklet_free(new_tasklet);
return -1;
}
static void h1_hdeaders_case_adjust_deinit()
{
struct ebpt_node *node, *next;
struct h1_hdr_entry *entry;
node = ebpt_first(&hdrs_map.map);
while (node) {
next = ebpt_next(node);
ebpt_delete(node);
entry = container_of(node, struct h1_hdr_entry, node);
free(entry->node.key);
istfree(&entry->name);
free(entry);
node = next;
}
free(hdrs_map.name);
}
static int cfg_h1_headers_case_adjust_postparser()
{
FILE *file = NULL;
char *c, *key_beg, *key_end, *value_beg, *value_end;
char *err;
int rc, line = 0, err_code = 0;
if (!hdrs_map.name)
goto end;
file = fopen(hdrs_map.name, "r");
if (!file) {
ha_alert("h1-headers-case-adjust-file '%s': failed to open file.\n",
hdrs_map.name);
err_code |= ERR_ALERT | ERR_FATAL;
goto end;
}
/* now parse all lines. The file may contain only two header name per
* line, separated by spaces. All heading and trailing spaces will be
* ignored. Lines starting with a # are ignored.
*/
while (fgets(trash.area, trash.size, file) != NULL) {
line++;
c = trash.area;
/* strip leading spaces and tabs */
while (*c == ' ' || *c == '\t')
c++;
/* ignore emptu lines, or lines beginning with a dash */
if (*c == '#' || *c == '\0' || *c == '\r' || *c == '\n')
continue;
/* look for the end of the key */
key_beg = c;
while (*c != '\0' && *c != ' ' && *c != '\t' && *c != '\n' && *c != '\r')
c++;
key_end = c;
/* strip middle spaces and tabs */
while (*c == ' ' || *c == '\t')
c++;
/* look for the end of the value, it is the end of the line */
value_beg = c;
while (*c && *c != '\n' && *c != '\r')
c++;
value_end = c;
/* trim possibly trailing spaces and tabs */
while (value_end > value_beg && (value_end[-1] == ' ' || value_end[-1] == '\t'))
value_end--;
/* set final \0 and check entries */
*key_end = '\0';
*value_end = '\0';
err = NULL;
rc = add_hdr_case_adjust(key_beg, value_beg, &err);
if (rc < 0) {
ha_alert("h1-headers-case-adjust-file '%s' : %s at line %d.\n",
hdrs_map.name, err, line);
err_code |= ERR_ALERT | ERR_FATAL;
free(err);
goto end;
}
if (rc > 0) {
ha_warning("h1-headers-case-adjust-file '%s' : %s at line %d.\n",
hdrs_map.name, err, line);
err_code |= ERR_WARN;
free(err);
}
}
end:
if (file)
fclose(file);
hap_register_post_deinit(h1_hdeaders_case_adjust_deinit);
return err_code;
}
/* config parser for global "h1-accept-payload_=-with-any-method" */
static int cfg_parse_h1_accept_payload_with_any_method(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
if (too_many_args(0, args, err, NULL))
return -1;
accept_payload_with_any_method = 1;
return 0;
}
/* config parser for global "h1-header-case-adjust" */
static int cfg_parse_h1_header_case_adjust(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
if (too_many_args(2, args, err, NULL))
return -1;
if (!*(args[1]) || !*(args[2])) {
memprintf(err, "'%s' expects <from> and <to> as argument.", args[0]);
return -1;
}
return add_hdr_case_adjust(args[1], args[2], err);
}
/* config parser for global "h1-headers-case-adjust-file" */
static int cfg_parse_h1_headers_case_adjust_file(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
if (too_many_args(1, args, err, NULL))
return -1;
if (!*(args[1])) {
memprintf(err, "'%s' expects <file> as argument.", args[0]);
return -1;
}
free(hdrs_map.name);
hdrs_map.name = strdup(args[1]);
return 0;
}
/* config parser for global "tune.h1.zero-copy-fwd-recv" */
static int cfg_parse_h1_zero_copy_fwd_rcv(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
if (too_many_args(1, args, err, NULL))
return -1;
if (strcmp(args[1], "on") == 0)
global.tune.no_zero_copy_fwd &= ~NO_ZERO_COPY_FWD_H1_RCV;
else if (strcmp(args[1], "off") == 0)
global.tune.no_zero_copy_fwd |= NO_ZERO_COPY_FWD_H1_RCV;
else {
memprintf(err, "'%s' expects 'on' or 'off'.", args[0]);
return -1;
}
return 0;
}
/* config parser for global "tune.h1.zero-copy-fwd-send" */
static int cfg_parse_h1_zero_copy_fwd_snd(char **args, int section_type, struct proxy *curpx,
const struct proxy *defpx, const char *file, int line,
char **err)
{
if (too_many_args(1, args, err, NULL))
return -1;
if (strcmp(args[1], "on") == 0)
global.tune.no_zero_copy_fwd &= ~NO_ZERO_COPY_FWD_H1_SND;
else if (strcmp(args[1], "off") == 0)
global.tune.no_zero_copy_fwd |= NO_ZERO_COPY_FWD_H1_SND;
else {
memprintf(err, "'%s' expects 'on' or 'off'.", args[0]);
return -1;
}
return 0;
}
/* config keyword parsers */
static struct cfg_kw_list cfg_kws = {{ }, {
{ CFG_GLOBAL, "h1-accept-payload-with-any-method", cfg_parse_h1_accept_payload_with_any_method },
{ CFG_GLOBAL, "h1-case-adjust", cfg_parse_h1_header_case_adjust },
{ CFG_GLOBAL, "h1-case-adjust-file", cfg_parse_h1_headers_case_adjust_file },
{ CFG_GLOBAL, "tune.h1.zero-copy-fwd-recv", cfg_parse_h1_zero_copy_fwd_rcv },
{ CFG_GLOBAL, "tune.h1.zero-copy-fwd-send", cfg_parse_h1_zero_copy_fwd_snd },
{ 0, NULL, NULL },
}
};
INITCALL1(STG_REGISTER, cfg_register_keywords, &cfg_kws);
REGISTER_CONFIG_POSTPARSER("h1-headers-map", cfg_h1_headers_case_adjust_postparser);
/****************************************/
/* MUX initialization and instantiation */
/****************************************/
/* The mux operations */
static const struct mux_ops mux_http_ops = {
.init = h1_init,
.wake = h1_wake,
.attach = h1_attach,
.get_first_sc = h1_get_first_sc,
.detach = h1_detach,
.destroy = h1_destroy,
.avail_streams = h1_avail_streams,
.used_streams = h1_used_streams,
.rcv_buf = h1_rcv_buf,
.snd_buf = h1_snd_buf,
.nego_fastfwd = h1_nego_ff,
.done_fastfwd = h1_done_ff,
.fastfwd = h1_fastfwd,
.resume_fastfwd = h1_resume_fastfwd,
.subscribe = h1_subscribe,
.unsubscribe = h1_unsubscribe,
.shut = h1_shut,
.show_fd = h1_show_fd,
.show_sd = h1_show_sd,
.ctl = h1_ctl,
.sctl = h1_sctl,
.takeover = h1_takeover,
.flags = MX_FL_HTX,
.name = "H1",
};
static const struct mux_ops mux_h1_ops = {
.init = h1_init,
.wake = h1_wake,
.attach = h1_attach,
.get_first_sc = h1_get_first_sc,
.detach = h1_detach,
.destroy = h1_destroy,
.avail_streams = h1_avail_streams,
.used_streams = h1_used_streams,
.rcv_buf = h1_rcv_buf,
.snd_buf = h1_snd_buf,
.nego_fastfwd = h1_nego_ff,
.done_fastfwd = h1_done_ff,
.fastfwd = h1_fastfwd,
.resume_fastfwd = h1_resume_fastfwd,
.subscribe = h1_subscribe,
.unsubscribe = h1_unsubscribe,
.shut = h1_shut,
.show_fd = h1_show_fd,
.show_sd = h1_show_sd,
.ctl = h1_ctl,
.sctl = h1_sctl,
.takeover = h1_takeover,
.flags = MX_FL_HTX|MX_FL_NO_UPG,
.name = "H1",
};
/* this mux registers default HTX proto but also h1 proto (to be referenced in the conf */
static struct mux_proto_list mux_proto_h1 =
{ .token = IST("h1"), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &mux_h1_ops };
static struct mux_proto_list mux_proto_http =
{ .token = IST(""), .mode = PROTO_MODE_HTTP, .side = PROTO_SIDE_BOTH, .mux = &mux_http_ops };
INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_h1);
INITCALL1(STG_REGISTER, register_mux_proto, &mux_proto_http);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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