mirror of
https://git.haproxy.org/git/haproxy.git/
synced 2025-10-09 22:51:22 +02:00
a1bd1faeeb
I found on an (old) AIX 5.1 machine that stdint.h didn't exist while inttypes.h which is expected to include it does exist and provides the desired functionalities. As explained here, stdint being just a subset of inttypes for use in freestanding environments, it's probably always OK to switch to inttypes instead: https://pubs.opengroup.org/onlinepubs/009696799/basedefs/stdint.h.html Also it's even clearer here in the autoconf doc : https://www.gnu.org/software/autoconf/manual/autoconf-2.61/html_node/Header-Portability.html "The C99 standard says that inttypes.h includes stdint.h, so there's no need to include stdint.h separately in a standard environment. Some implementations have inttypes.h but not stdint.h (e.g., Solaris 7), but we don't know of any implementation that has stdint.h but not inttypes.h"
213 lines
9.5 KiB
C
213 lines
9.5 KiB
C
/*
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* HPACK decompressor (RFC7541)
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*
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* Copyright (C) 2014-2017 Willy Tarreau <willy@haproxy.org>
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* Copyright (C) 2017 HAProxy Technologies
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <common/hpack-enc.h>
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#include <common/http-hdr.h>
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#include <common/ist.h>
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#include <types/global.h>
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/*
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* HPACK encoding: these tables were generated using gen-enc.c
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*/
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/* encoding of stream of compressed headers. This stream is composed of series
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* of <len:8b> <index:8b> <name:<len>*8b>.
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*/
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const char hpack_enc_stream[666] = {
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/* 0: */ 0x03, 0x15, 0x61, 0x67, 0x65, 0x03, 0x3c, 0x76,
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/* 8: */ 0x69, 0x61, 0x04, 0x21, 0x64, 0x61, 0x74, 0x65,
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/* 16: */ 0x04, 0x26, 0x68, 0x6f, 0x73, 0x74, 0x04, 0x22,
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/* 24: */ 0x65, 0x74, 0x61, 0x67, 0x04, 0x25, 0x66, 0x72,
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/* 32: */ 0x6f, 0x6d, 0x04, 0x2d, 0x6c, 0x69, 0x6e, 0x6b,
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/* 40: */ 0x04, 0x3b, 0x76, 0x61, 0x72, 0x79, 0x05, 0x04,
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/* 48: */ 0x3a, 0x70, 0x61, 0x74, 0x68, 0x05, 0x16, 0x61,
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/* 56: */ 0x6c, 0x6c, 0x6f, 0x77, 0x05, 0x32, 0x72, 0x61,
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/* 64: */ 0x6e, 0x67, 0x65, 0x06, 0x13, 0x61, 0x63, 0x63,
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/* 72: */ 0x65, 0x70, 0x74, 0x06, 0x36, 0x73, 0x65, 0x72,
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/* 80: */ 0x76, 0x65, 0x72, 0x06, 0x20, 0x63, 0x6f, 0x6f,
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/* 88: */ 0x6b, 0x69, 0x65, 0x06, 0x23, 0x65, 0x78, 0x70,
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/* 96: */ 0x65, 0x63, 0x74, 0x07, 0x33, 0x72, 0x65, 0x66,
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/* 104: */ 0x65, 0x72, 0x65, 0x72, 0x07, 0x24, 0x65, 0x78,
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/* 112: */ 0x70, 0x69, 0x72, 0x65, 0x73, 0x07, 0x02, 0x3a,
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/* 120: */ 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x07, 0x06,
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/* 128: */ 0x3a, 0x73, 0x63, 0x68, 0x65, 0x6d, 0x65, 0x07,
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/* 136: */ 0x08, 0x3a, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73,
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/* 144: */ 0x07, 0x34, 0x72, 0x65, 0x66, 0x72, 0x65, 0x73,
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/* 152: */ 0x68, 0x08, 0x2e, 0x6c, 0x6f, 0x63, 0x61, 0x74,
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/* 160: */ 0x69, 0x6f, 0x6e, 0x08, 0x27, 0x69, 0x66, 0x2d,
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/* 168: */ 0x6d, 0x61, 0x74, 0x63, 0x68, 0x08, 0x2a, 0x69,
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/* 176: */ 0x66, 0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x0a,
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/* 184: */ 0x3a, 0x75, 0x73, 0x65, 0x72, 0x2d, 0x61, 0x67,
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/* 192: */ 0x65, 0x6e, 0x74, 0x0a, 0x37, 0x73, 0x65, 0x74,
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/* 200: */ 0x2d, 0x63, 0x6f, 0x6f, 0x6b, 0x69, 0x65, 0x0a,
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/* 208: */ 0x01, 0x3a, 0x61, 0x75, 0x74, 0x68, 0x6f, 0x72,
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/* 216: */ 0x69, 0x74, 0x79, 0x0b, 0x35, 0x72, 0x65, 0x74,
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/* 224: */ 0x72, 0x79, 0x2d, 0x61, 0x66, 0x74, 0x65, 0x72,
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/* 232: */ 0x0c, 0x1f, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,
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/* 240: */ 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x0c, 0x2f,
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/* 248: */ 0x6d, 0x61, 0x78, 0x2d, 0x66, 0x6f, 0x72, 0x77,
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/* 256: */ 0x61, 0x72, 0x64, 0x73, 0x0d, 0x18, 0x63, 0x61,
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/* 264: */ 0x63, 0x68, 0x65, 0x2d, 0x63, 0x6f, 0x6e, 0x74,
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/* 272: */ 0x72, 0x6f, 0x6c, 0x0d, 0x2c, 0x6c, 0x61, 0x73,
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/* 280: */ 0x74, 0x2d, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69,
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/* 288: */ 0x65, 0x64, 0x0d, 0x12, 0x61, 0x63, 0x63, 0x65,
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/* 296: */ 0x70, 0x74, 0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65,
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/* 304: */ 0x73, 0x0d, 0x29, 0x69, 0x66, 0x2d, 0x6e, 0x6f,
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/* 312: */ 0x6e, 0x65, 0x2d, 0x6d, 0x61, 0x74, 0x63, 0x68,
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/* 320: */ 0x0d, 0x17, 0x61, 0x75, 0x74, 0x68, 0x6f, 0x72,
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/* 328: */ 0x69, 0x7a, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x0d,
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/* 336: */ 0x1e, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74,
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/* 344: */ 0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x0e, 0x1c,
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/* 352: */ 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d,
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/* 360: */ 0x6c, 0x65, 0x6e, 0x67, 0x74, 0x68, 0x0e, 0x0f,
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/* 368: */ 0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x2d, 0x63,
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/* 376: */ 0x68, 0x61, 0x72, 0x73, 0x65, 0x74, 0x0f, 0x10,
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/* 384: */ 0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x2d, 0x65,
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/* 392: */ 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x0f,
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/* 400: */ 0x11, 0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x2d,
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/* 408: */ 0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65,
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/* 416: */ 0x10, 0x1a, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,
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/* 424: */ 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69,
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/* 432: */ 0x6e, 0x67, 0x10, 0x1b, 0x63, 0x6f, 0x6e, 0x74,
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/* 440: */ 0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x61, 0x6e, 0x67,
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/* 448: */ 0x75, 0x61, 0x67, 0x65, 0x10, 0x1d, 0x63, 0x6f,
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/* 456: */ 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x6f,
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/* 464: */ 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x10, 0x3d,
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/* 472: */ 0x77, 0x77, 0x77, 0x2d, 0x61, 0x75, 0x74, 0x68,
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/* 480: */ 0x65, 0x6e, 0x74, 0x69, 0x63, 0x61, 0x74, 0x65,
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/* 488: */ 0x11, 0x39, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x66,
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/* 496: */ 0x65, 0x72, 0x2d, 0x65, 0x6e, 0x63, 0x6f, 0x64,
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/* 504: */ 0x69, 0x6e, 0x67, 0x11, 0x28, 0x69, 0x66, 0x2d,
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/* 512: */ 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69, 0x65, 0x64,
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/* 520: */ 0x2d, 0x73, 0x69, 0x6e, 0x63, 0x65, 0x12, 0x30,
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/* 528: */ 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2d, 0x61, 0x75,
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/* 536: */ 0x74, 0x68, 0x65, 0x6e, 0x74, 0x69, 0x63, 0x61,
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/* 544: */ 0x74, 0x65, 0x13, 0x19, 0x63, 0x6f, 0x6e, 0x74,
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/* 552: */ 0x65, 0x6e, 0x74, 0x2d, 0x64, 0x69, 0x73, 0x70,
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/* 560: */ 0x6f, 0x73, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x13,
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/* 568: */ 0x2b, 0x69, 0x66, 0x2d, 0x75, 0x6e, 0x6d, 0x6f,
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/* 576: */ 0x64, 0x69, 0x66, 0x69, 0x65, 0x64, 0x2d, 0x73,
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/* 584: */ 0x69, 0x6e, 0x63, 0x65, 0x13, 0x31, 0x70, 0x72,
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/* 592: */ 0x6f, 0x78, 0x79, 0x2d, 0x61, 0x75, 0x74, 0x68,
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/* 600: */ 0x6f, 0x72, 0x69, 0x7a, 0x61, 0x74, 0x69, 0x6f,
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/* 608: */ 0x6e, 0x19, 0x38, 0x73, 0x74, 0x72, 0x69, 0x63,
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/* 616: */ 0x74, 0x2d, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70,
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/* 624: */ 0x6f, 0x72, 0x74, 0x2d, 0x73, 0x65, 0x63, 0x75,
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/* 632: */ 0x72, 0x69, 0x74, 0x79, 0x1b, 0x14, 0x61, 0x63,
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/* 640: */ 0x63, 0x65, 0x73, 0x73, 0x2d, 0x63, 0x6f, 0x6e,
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/* 648: */ 0x74, 0x72, 0x6f, 0x6c, 0x2d, 0x61, 0x6c, 0x6c,
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/* 656: */ 0x6f, 0x77, 0x2d, 0x6f, 0x72, 0x69, 0x67, 0x69,
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/* 664: */ 0x6e, 0x00,
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};
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/* This points to the first position in table hpack_enc_stream[] of a header
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* of the same length.
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*/
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const signed short hpack_pos_len[32] = {
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/* 0: */ -1, -1, -1, 0, 10, 46, 67, 99,
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/* 8: */ 153, -1, 183, 219, 232, 260, 350, 382,
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/* 16: */ 416, 488, 526, 546, -1, -1, -1, -1,
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/* 24: */ -1, 609, -1, 636, -1, -1, -1, -1,
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};
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/* Tries to encode header whose name is <n> and value <v> into the chunk <out>.
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* Returns non-zero on success, 0 on failure (buffer full).
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*/
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int hpack_encode_header(struct buffer *out, const struct ist n,
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const struct ist v)
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{
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int len = out->data;
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int size = out->size;
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int pos;
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if (len >= size)
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return 0;
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/* look for the header field <n> in the static table */
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if (n.len >= sizeof(hpack_pos_len) / sizeof(hpack_pos_len[0]))
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goto make_literal;
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pos = hpack_pos_len[n.len];
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if (pos >= 0) {
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/* At least one header field of this length exist */
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do {
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char idx;
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pos++;
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idx = hpack_enc_stream[pos++];
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pos += n.len;
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if (isteq(ist2(&hpack_enc_stream[pos - n.len], n.len), n)) {
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/* emit literal with indexing (7541#6.2.1) :
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* [ 0 | 1 | Index (6+) ]
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*/
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out->area[len++] = idx | 0x40;
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goto emit_value;
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}
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} while ((unsigned char)hpack_enc_stream[pos] == n.len);
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}
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make_literal:
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if (likely(n.len < 127 && len + 2 + n.len <= size)) {
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out->area[len++] = 0x00; /* literal without indexing -- new name */
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out->area[len++] = n.len; /* single-byte length encoding */
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ist2bin(out->area + len, n);
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len += n.len;
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}
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else if (hpack_len_to_bytes(n.len) &&
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len + 1 + hpack_len_to_bytes(n.len) + n.len <= size) {
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out->area[len++] = 0x00; /* literal without indexing -- new name */
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len = hpack_encode_len(out->area, len, n.len);
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ist2bin(out->area + len, n);
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len += n.len;
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}
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else {
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/* header field name too large for the buffer */
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return 0;
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}
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emit_value:
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/* copy literal header field value */
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if (!hpack_len_to_bytes(v.len) ||
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len + hpack_len_to_bytes(v.len) + v.len > size) {
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/* header value too large for the buffer */
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return 0;
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}
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len = hpack_encode_len(out->area, len, v.len);
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memcpy(out->area + len, v.ptr, v.len);
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len += v.len;
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out->data = len;
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return 1;
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}
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