mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-08-06 23:36:59 +02:00
Make the sandbox mock ethernet driver (drivers/net/sandbox.c) compatible with NET_LWIP by not relying on any of the structures or functions defined in net-legacy.h. This is done by providing local definitions of the various protocol structures (Ethernet, ARP, IPv4, ICMP). Drop the stub driver that was introduced specifically for NET_LWIP (drivers/net/sandbox-lwip.c). Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
524 lines
12 KiB
C
524 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2015 National Instruments
|
|
*
|
|
* (C) Copyright 2015
|
|
* Joe Hershberger <joe.hershberger@ni.com>
|
|
*/
|
|
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <asm/eth.h>
|
|
#include <asm/global_data.h>
|
|
#include <asm/test.h>
|
|
#include <asm/types.h>
|
|
|
|
/*
|
|
* Structure definitions for network protocols. Since this file is used for
|
|
* both NET and NET_LWIP, and given that the two network stacks do have
|
|
* conflicting types (for instance struct icmp_hdr), it is on purpose that the
|
|
* structures are defined locally with minimal dependencies -- <asm/types.h> is
|
|
* included for the bit types and that's it.
|
|
*/
|
|
|
|
#define ETHADDR_LEN 6
|
|
#define IP4_LEN 4
|
|
|
|
struct ethhdr {
|
|
u8 dst[ETHADDR_LEN];
|
|
u8 src[ETHADDR_LEN];
|
|
u16 protlen;
|
|
} __attribute__((packed));
|
|
|
|
#define ETHHDR_SIZE (sizeof(struct ethhdr))
|
|
|
|
struct arphdr {
|
|
u16 htype;
|
|
u16 ptype;
|
|
u8 hlen;
|
|
u8 plen;
|
|
u16 op;
|
|
} __attribute__((packed));
|
|
|
|
#define ARPHDR_SIZE (sizeof(struct arphdr))
|
|
|
|
#define ARP_REQUEST 1
|
|
#define ARP_REPLY 2
|
|
|
|
struct arpdata {
|
|
u8 sha[ETHADDR_LEN];
|
|
u32 spa;
|
|
u8 tha[ETHADDR_LEN];
|
|
u32 tpa;
|
|
} __attribute__((packed));
|
|
|
|
#define ARPDATA_SIZE (sizeof(struct arpdata))
|
|
|
|
struct iphdr {
|
|
u8 hl_v;
|
|
u8 tos;
|
|
u16 len;
|
|
u16 id;
|
|
u16 off;
|
|
u8 ttl;
|
|
u8 prot;
|
|
u16 sum;
|
|
u32 src;
|
|
u32 dst;
|
|
} __attribute__((packed));
|
|
|
|
#define IPHDR_SIZE (sizeof(struct iphdr))
|
|
|
|
struct icmphdr {
|
|
u8 type;
|
|
u8 code;
|
|
u16 checksum;
|
|
u16 id;
|
|
u16 sequence;
|
|
} __attribute__((packed));
|
|
|
|
#define ICMPHDR_SIZE (sizeof(struct icmphdr))
|
|
|
|
#define ICMP_ECHO_REQUEST 8
|
|
#define ICMP_ECHO_REPLY 0
|
|
#define IPPROTO_ICMP 1
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static const u8 null_ethaddr[6];
|
|
static bool skip_timeout;
|
|
|
|
/*
|
|
* sandbox_eth_disable_response()
|
|
*
|
|
* index - The alias index (also DM seq number)
|
|
* disable - If non-zero, ignore sent packets and don't send mock response
|
|
*/
|
|
void sandbox_eth_disable_response(int index, bool disable)
|
|
{
|
|
struct udevice *dev;
|
|
struct eth_sandbox_priv *priv;
|
|
int ret;
|
|
|
|
ret = uclass_get_device(UCLASS_ETH, index, &dev);
|
|
if (ret)
|
|
return;
|
|
|
|
priv = dev_get_priv(dev);
|
|
priv->disabled = disable;
|
|
}
|
|
|
|
/*
|
|
* sandbox_eth_skip_timeout()
|
|
*
|
|
* When the first packet read is attempted, fast-forward time
|
|
*/
|
|
void sandbox_eth_skip_timeout(void)
|
|
{
|
|
skip_timeout = true;
|
|
}
|
|
|
|
/*
|
|
* sandbox_eth_arp_req_to_reply()
|
|
*
|
|
* Check for an arp request to be sent. If so, inject a reply
|
|
*
|
|
* returns 0 if injected, -EAGAIN if not
|
|
*/
|
|
int sandbox_eth_arp_req_to_reply(struct udevice *dev, void *packet,
|
|
unsigned int len)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
struct ethhdr *eth = packet;
|
|
struct arphdr *arp;
|
|
struct arpdata *arpd;
|
|
struct ethhdr *eth_recv;
|
|
struct arphdr *arp_recv;
|
|
struct arpdata *arp_recvd;
|
|
|
|
if (ntohs(eth->protlen) != PROT_ARP)
|
|
return -EAGAIN;
|
|
|
|
arp = packet + ETHHDR_SIZE;
|
|
|
|
if (ntohs(arp->op) != ARP_REQUEST)
|
|
return -EAGAIN;
|
|
|
|
/* Don't allow the buffer to overrun */
|
|
if (priv->recv_packets >= PKTBUFSRX)
|
|
return 0;
|
|
|
|
/* store this as the assumed IP of the fake host */
|
|
arpd = (struct arpdata *)(arp + 1);
|
|
priv->fake_host_ipaddr.s_addr = arpd->tpa;
|
|
|
|
/* Formulate a fake response */
|
|
eth_recv = (void *)priv->recv_packet_buffer[priv->recv_packets];
|
|
memcpy(eth_recv->dst, eth->src, ETHADDR_LEN);
|
|
memcpy(eth_recv->src, priv->fake_host_hwaddr, ETHADDR_LEN);
|
|
eth_recv->protlen = htons(PROT_ARP);
|
|
|
|
arp_recv = (void *)eth_recv + ETHHDR_SIZE;
|
|
arp_recv->htype = htons(ARP_ETHER);
|
|
arp_recv->ptype = htons(PROT_IP);
|
|
arp_recv->hlen = ETHADDR_LEN;
|
|
arp_recv->plen = IP4_LEN;
|
|
arp_recv->op = htons(ARP_REPLY);
|
|
arp_recvd = (struct arpdata *)(arp_recv + 1);
|
|
memcpy(&arp_recvd->sha, priv->fake_host_hwaddr, ETHADDR_LEN);
|
|
arp_recvd->spa = priv->fake_host_ipaddr.s_addr;
|
|
memcpy(&arp_recvd->tha, &arpd->sha, ETHADDR_LEN);
|
|
arp_recvd->tpa = arpd->spa;
|
|
|
|
priv->recv_packet_length[priv->recv_packets] = ETHHDR_SIZE +
|
|
ARPHDR_SIZE + ARPDATA_SIZE;
|
|
++priv->recv_packets;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sandbox_eth_ping_req_to_reply()
|
|
*
|
|
* Check for a ping request to be sent. If so, inject a reply
|
|
*
|
|
* returns 0 if injected, -EAGAIN if not
|
|
*/
|
|
int sandbox_eth_ping_req_to_reply(struct udevice *dev, void *packet,
|
|
unsigned int len)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
struct ethhdr *eth = packet;
|
|
struct iphdr *ip;
|
|
struct icmphdr *icmp;
|
|
struct ethhdr *eth_recv;
|
|
struct iphdr *ipr;
|
|
struct icmphdr *icmpr;
|
|
|
|
if (ntohs(eth->protlen) != PROT_IP)
|
|
return -EAGAIN;
|
|
|
|
ip = packet + ETHHDR_SIZE;
|
|
|
|
if (ip->prot != IPPROTO_ICMP)
|
|
return -EAGAIN;
|
|
|
|
icmp = (struct icmphdr *)(ip + 1);
|
|
|
|
if (icmp->type != ICMP_ECHO_REQUEST)
|
|
return -EAGAIN;
|
|
|
|
/* Don't allow the buffer to overrun */
|
|
if (priv->recv_packets >= PKTBUFSRX)
|
|
return 0;
|
|
|
|
/* reply to the ping */
|
|
eth_recv = (void *)priv->recv_packet_buffer[priv->recv_packets];
|
|
memcpy(eth_recv, packet, len);
|
|
ipr = (void *)eth_recv + ETHHDR_SIZE;
|
|
icmpr = (struct icmphdr *)(ipr + 1);
|
|
memcpy(eth_recv->dst, eth->src, ETHADDR_LEN);
|
|
memcpy(eth_recv->src, priv->fake_host_hwaddr, ETHADDR_LEN);
|
|
ipr->sum = 0;
|
|
ipr->off = 0;
|
|
ipr->dst = ip->src;
|
|
ipr->src = priv->fake_host_ipaddr.s_addr;
|
|
ipr->sum = compute_ip_checksum(ipr, IPHDR_SIZE);
|
|
|
|
icmpr->type = ICMP_ECHO_REPLY;
|
|
icmpr->checksum = 0;
|
|
icmpr->checksum = compute_ip_checksum(icmpr, ICMPHDR_SIZE);
|
|
|
|
priv->recv_packet_length[priv->recv_packets] = len;
|
|
++priv->recv_packets;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sandbox_eth_recv_arp_req()
|
|
*
|
|
* Inject an ARP request for this target
|
|
*
|
|
* returns 0 if injected, -EOVERFLOW if not
|
|
*/
|
|
int sandbox_eth_recv_arp_req(struct udevice *dev)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
struct ethhdr *eth_recv;
|
|
struct arphdr *arp_recv;
|
|
struct arpdata *arp_recvd;
|
|
|
|
/* Don't allow the buffer to overrun */
|
|
if (priv->recv_packets >= PKTBUFSRX)
|
|
return -EOVERFLOW;
|
|
|
|
/* Formulate a fake request */
|
|
eth_recv = (void *)priv->recv_packet_buffer[priv->recv_packets];
|
|
memcpy(eth_recv->dst, net_bcast_ethaddr, ETHADDR_LEN);
|
|
memcpy(eth_recv->src, priv->fake_host_hwaddr, ETHADDR_LEN);
|
|
eth_recv->protlen = htons(PROT_ARP);
|
|
|
|
arp_recv = (void *)eth_recv + ETHHDR_SIZE;
|
|
arp_recv->htype = htons(ARP_ETHER);
|
|
arp_recv->ptype = htons(PROT_IP);
|
|
arp_recv->hlen = ETHADDR_LEN;
|
|
arp_recv->plen = IP4_LEN;
|
|
arp_recv->op = htons(ARP_REQUEST);
|
|
arp_recvd = (struct arpdata *)(arp_recv + 1);
|
|
memcpy(&arp_recvd->sha, priv->fake_host_hwaddr, ETHADDR_LEN);
|
|
arp_recvd->spa = priv->fake_host_ipaddr.s_addr;
|
|
memcpy(&arp_recvd->tha, null_ethaddr, ETHADDR_LEN);
|
|
arp_recvd->tpa = net_ip.s_addr;
|
|
|
|
priv->recv_packet_length[priv->recv_packets] =
|
|
ETHHDR_SIZE + ARPHDR_SIZE + ARPDATA_SIZE;
|
|
++priv->recv_packets;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sandbox_eth_recv_ping_req()
|
|
*
|
|
* Inject a ping request for this target
|
|
*
|
|
* returns 0 if injected, -EOVERFLOW if not
|
|
*/
|
|
int sandbox_eth_recv_ping_req(struct udevice *dev)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
struct eth_pdata *pdata = dev_get_plat(dev);
|
|
struct ethhdr *eth_recv;
|
|
struct iphdr *ipr;
|
|
struct icmphdr *icmpr;
|
|
|
|
/* Don't allow the buffer to overrun */
|
|
if (priv->recv_packets >= PKTBUFSRX)
|
|
return -EOVERFLOW;
|
|
|
|
/* Formulate a fake ping */
|
|
eth_recv = (void *)priv->recv_packet_buffer[priv->recv_packets];
|
|
|
|
memcpy(eth_recv->dst, pdata->enetaddr, ETHADDR_LEN);
|
|
memcpy(eth_recv->src, priv->fake_host_hwaddr, ETHADDR_LEN);
|
|
eth_recv->protlen = htons(PROT_IP);
|
|
|
|
ipr = (void *)eth_recv + ETHHDR_SIZE;
|
|
ipr->hl_v = 0x45;
|
|
ipr->len = htons(IPHDR_SIZE + ICMPHDR_SIZE);
|
|
ipr->off = htons(IP_FLAGS_DFRAG);
|
|
ipr->prot = IPPROTO_ICMP;
|
|
ipr->sum = 0;
|
|
ipr->src = priv->fake_host_ipaddr.s_addr;
|
|
ipr->dst = net_ip.s_addr;
|
|
ipr->sum = compute_ip_checksum(ipr, IPHDR_SIZE);
|
|
|
|
icmpr = (struct icmphdr *)(ipr + 1);
|
|
|
|
icmpr->type = ICMP_ECHO_REQUEST;
|
|
icmpr->code = 0;
|
|
icmpr->checksum = 0;
|
|
icmpr->id = 0;
|
|
icmpr->sequence = htons(1);
|
|
icmpr->checksum = compute_ip_checksum(icmpr, ICMPHDR_SIZE);
|
|
|
|
priv->recv_packet_length[priv->recv_packets] =
|
|
ETHHDR_SIZE + IPHDR_SIZE + ICMPHDR_SIZE;
|
|
++priv->recv_packets;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sb_default_handler()
|
|
*
|
|
* perform typical responses to simple ping
|
|
*
|
|
* dev - device pointer
|
|
* pkt - "sent" packet buffer
|
|
* len - length of packet
|
|
*/
|
|
static int sb_default_handler(struct udevice *dev, void *packet,
|
|
unsigned int len)
|
|
{
|
|
if (!sandbox_eth_arp_req_to_reply(dev, packet, len))
|
|
return 0;
|
|
if (!sandbox_eth_ping_req_to_reply(dev, packet, len))
|
|
return 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* sandbox_eth_set_tx_handler()
|
|
*
|
|
* Set a custom response to a packet being sent through the sandbox eth test
|
|
* driver
|
|
*
|
|
* index - interface to set the handler for
|
|
* handler - The func ptr to call on send. If NULL, set to default handler
|
|
*/
|
|
void sandbox_eth_set_tx_handler(int index, sandbox_eth_tx_hand_f *handler)
|
|
{
|
|
struct udevice *dev;
|
|
struct eth_sandbox_priv *priv;
|
|
int ret;
|
|
|
|
ret = uclass_get_device(UCLASS_ETH, index, &dev);
|
|
if (ret)
|
|
return;
|
|
|
|
priv = dev_get_priv(dev);
|
|
if (handler)
|
|
priv->tx_handler = handler;
|
|
else
|
|
priv->tx_handler = sb_default_handler;
|
|
}
|
|
|
|
/*
|
|
* Set priv ptr
|
|
*
|
|
* priv - priv void ptr to store in the device
|
|
*/
|
|
void sandbox_eth_set_priv(int index, void *priv)
|
|
{
|
|
struct udevice *dev;
|
|
struct eth_sandbox_priv *dev_priv;
|
|
int ret;
|
|
|
|
ret = uclass_get_device(UCLASS_ETH, index, &dev);
|
|
if (ret)
|
|
return;
|
|
|
|
dev_priv = dev_get_priv(dev);
|
|
|
|
dev_priv->priv = priv;
|
|
}
|
|
|
|
static int sb_eth_start(struct udevice *dev)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
|
|
debug("eth_sandbox: Start\n");
|
|
|
|
priv->recv_packets = 0;
|
|
for (int i = 0; i < PKTBUFSRX; i++) {
|
|
priv->recv_packet_buffer[i] = net_rx_packets[i];
|
|
priv->recv_packet_length[i] = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sb_eth_send(struct udevice *dev, void *packet, int length)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
|
|
debug("eth_sandbox: Send packet %d\n", length);
|
|
|
|
if (priv->disabled)
|
|
return 0;
|
|
|
|
return priv->tx_handler(dev, packet, length);
|
|
}
|
|
|
|
static int sb_eth_recv(struct udevice *dev, int flags, uchar **packetp)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
|
|
if (skip_timeout) {
|
|
timer_test_add_offset(11000UL);
|
|
skip_timeout = false;
|
|
}
|
|
|
|
if (priv->recv_packets) {
|
|
int lcl_recv_packet_length = priv->recv_packet_length[0];
|
|
|
|
debug("eth_sandbox: received packet[%d], %d waiting\n",
|
|
lcl_recv_packet_length, priv->recv_packets - 1);
|
|
*packetp = priv->recv_packet_buffer[0];
|
|
return lcl_recv_packet_length;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int sb_eth_free_pkt(struct udevice *dev, uchar *packet, int length)
|
|
{
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
int i;
|
|
|
|
if (!priv->recv_packets)
|
|
return 0;
|
|
|
|
--priv->recv_packets;
|
|
for (i = 0; i < priv->recv_packets; i++) {
|
|
priv->recv_packet_length[i] = priv->recv_packet_length[i + 1];
|
|
memcpy(priv->recv_packet_buffer[i],
|
|
priv->recv_packet_buffer[i + 1],
|
|
priv->recv_packet_length[i + 1]);
|
|
}
|
|
priv->recv_packet_length[priv->recv_packets] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sb_eth_stop(struct udevice *dev)
|
|
{
|
|
debug("eth_sandbox: Stop\n");
|
|
}
|
|
|
|
static int sb_eth_write_hwaddr(struct udevice *dev)
|
|
{
|
|
struct eth_pdata *pdata = dev_get_plat(dev);
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
|
|
debug("eth_sandbox %s: Write HW ADDR - %pM\n", dev->name,
|
|
pdata->enetaddr);
|
|
memcpy(priv->fake_host_hwaddr, pdata->enetaddr, ETHADDR_LEN);
|
|
return 0;
|
|
}
|
|
|
|
static const struct eth_ops sb_eth_ops = {
|
|
.start = sb_eth_start,
|
|
.send = sb_eth_send,
|
|
.recv = sb_eth_recv,
|
|
.free_pkt = sb_eth_free_pkt,
|
|
.stop = sb_eth_stop,
|
|
.write_hwaddr = sb_eth_write_hwaddr,
|
|
};
|
|
|
|
static int sb_eth_remove(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int sb_eth_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct eth_pdata *pdata = dev_get_plat(dev);
|
|
struct eth_sandbox_priv *priv = dev_get_priv(dev);
|
|
|
|
pdata->iobase = dev_read_addr(dev);
|
|
priv->disabled = false;
|
|
priv->tx_handler = sb_default_handler;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id sb_eth_ids[] = {
|
|
{ .compatible = "sandbox,eth" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(eth_sandbox) = {
|
|
.name = "eth_sandbox",
|
|
.id = UCLASS_ETH,
|
|
.of_match = sb_eth_ids,
|
|
.of_to_plat = sb_eth_of_to_plat,
|
|
.remove = sb_eth_remove,
|
|
.ops = &sb_eth_ops,
|
|
.priv_auto = sizeof(struct eth_sandbox_priv),
|
|
.plat_auto = sizeof(struct eth_pdata),
|
|
};
|