u-boot/drivers/net/sandbox.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

225 lines
5.6 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015 National Instruments
*
* (C) Copyright 2015
* Joe Hershberger <joe.hershberger@ni.com>
*/
#include <common.h>
#include <dm.h>
#include <malloc.h>
#include <net.h>
#include <asm/test.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* struct eth_sandbox_priv - memory for sandbox mock driver
*
* fake_host_hwaddr: MAC address of mocked machine
* fake_host_ipaddr: IP address of mocked machine
* recv_packet_buffer: buffer of the packet returned as received
* recv_packet_length: length of the packet returned as received
*/
struct eth_sandbox_priv {
uchar fake_host_hwaddr[ARP_HLEN];
struct in_addr fake_host_ipaddr;
uchar *recv_packet_buffer;
int recv_packet_length;
};
static bool disabled[8] = {false};
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)
{
disabled[index] = disable;
}
/*
* sandbox_eth_skip_timeout()
*
* When the first packet read is attempted, fast-forward time
*/
void sandbox_eth_skip_timeout(void)
{
skip_timeout = true;
}
static int sb_eth_start(struct udevice *dev)
{
struct eth_sandbox_priv *priv = dev_get_priv(dev);
debug("eth_sandbox: Start\n");
fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(dev),
"fake-host-hwaddr", priv->fake_host_hwaddr,
ARP_HLEN);
priv->recv_packet_buffer = net_rx_packets[0];
return 0;
}
static int sb_eth_send(struct udevice *dev, void *packet, int length)
{
struct eth_sandbox_priv *priv = dev_get_priv(dev);
struct ethernet_hdr *eth = packet;
debug("eth_sandbox: Send packet %d\n", length);
if (dev->seq >= 0 && dev->seq < ARRAY_SIZE(disabled) &&
disabled[dev->seq])
return 0;
if (ntohs(eth->et_protlen) == PROT_ARP) {
struct arp_hdr *arp = packet + ETHER_HDR_SIZE;
if (ntohs(arp->ar_op) == ARPOP_REQUEST) {
struct ethernet_hdr *eth_recv;
struct arp_hdr *arp_recv;
/* store this as the assumed IP of the fake host */
priv->fake_host_ipaddr = net_read_ip(&arp->ar_tpa);
/* Formulate a fake response */
eth_recv = (void *)priv->recv_packet_buffer;
memcpy(eth_recv->et_dest, eth->et_src, ARP_HLEN);
memcpy(eth_recv->et_src, priv->fake_host_hwaddr,
ARP_HLEN);
eth_recv->et_protlen = htons(PROT_ARP);
arp_recv = (void *)priv->recv_packet_buffer +
ETHER_HDR_SIZE;
arp_recv->ar_hrd = htons(ARP_ETHER);
arp_recv->ar_pro = htons(PROT_IP);
arp_recv->ar_hln = ARP_HLEN;
arp_recv->ar_pln = ARP_PLEN;
arp_recv->ar_op = htons(ARPOP_REPLY);
memcpy(&arp_recv->ar_sha, priv->fake_host_hwaddr,
ARP_HLEN);
net_write_ip(&arp_recv->ar_spa, priv->fake_host_ipaddr);
memcpy(&arp_recv->ar_tha, &arp->ar_sha, ARP_HLEN);
net_copy_ip(&arp_recv->ar_tpa, &arp->ar_spa);
priv->recv_packet_length = ETHER_HDR_SIZE +
ARP_HDR_SIZE;
}
} else if (ntohs(eth->et_protlen) == PROT_IP) {
struct ip_udp_hdr *ip = packet + ETHER_HDR_SIZE;
if (ip->ip_p == IPPROTO_ICMP) {
struct icmp_hdr *icmp = (struct icmp_hdr *)&ip->udp_src;
if (icmp->type == ICMP_ECHO_REQUEST) {
struct ethernet_hdr *eth_recv;
struct ip_udp_hdr *ipr;
struct icmp_hdr *icmpr;
/* reply to the ping */
memcpy(priv->recv_packet_buffer, packet,
length);
eth_recv = (void *)priv->recv_packet_buffer;
ipr = (void *)priv->recv_packet_buffer +
ETHER_HDR_SIZE;
icmpr = (struct icmp_hdr *)&ipr->udp_src;
memcpy(eth_recv->et_dest, eth->et_src,
ARP_HLEN);
memcpy(eth_recv->et_src, priv->fake_host_hwaddr,
ARP_HLEN);
ipr->ip_sum = 0;
ipr->ip_off = 0;
net_copy_ip((void *)&ipr->ip_dst, &ip->ip_src);
net_write_ip((void *)&ipr->ip_src,
priv->fake_host_ipaddr);
ipr->ip_sum = compute_ip_checksum(ipr,
IP_HDR_SIZE);
icmpr->type = ICMP_ECHO_REPLY;
icmpr->checksum = 0;
icmpr->checksum = compute_ip_checksum(icmpr,
ICMP_HDR_SIZE);
priv->recv_packet_length = length;
}
}
}
return 0;
}
static int sb_eth_recv(struct udevice *dev, int flags, uchar **packetp)
{
struct eth_sandbox_priv *priv = dev_get_priv(dev);
if (skip_timeout) {
sandbox_timer_add_offset(11000UL);
skip_timeout = false;
}
if (priv->recv_packet_length) {
int lcl_recv_packet_length = priv->recv_packet_length;
debug("eth_sandbox: received packet %d\n",
priv->recv_packet_length);
priv->recv_packet_length = 0;
*packetp = priv->recv_packet_buffer;
return lcl_recv_packet_length;
}
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_platdata(dev);
debug("eth_sandbox %s: Write HW ADDR - %pM\n", dev->name,
pdata->enetaddr);
return 0;
}
static const struct eth_ops sb_eth_ops = {
.start = sb_eth_start,
.send = sb_eth_send,
.recv = sb_eth_recv,
.stop = sb_eth_stop,
.write_hwaddr = sb_eth_write_hwaddr,
};
static int sb_eth_remove(struct udevice *dev)
{
return 0;
}
static int sb_eth_ofdata_to_platdata(struct udevice *dev)
{
struct eth_pdata *pdata = dev_get_platdata(dev);
pdata->iobase = devfdt_get_addr(dev);
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,
.ofdata_to_platdata = sb_eth_ofdata_to_platdata,
.remove = sb_eth_remove,
.ops = &sb_eth_ops,
.priv_auto_alloc_size = sizeof(struct eth_sandbox_priv),
.platdata_auto_alloc_size = sizeof(struct eth_pdata),
};