static int sender_iface(struct net_if *iface, struct net_pkt *pkt)
{
if (!pkt->frags) {
DBG("No data to send!\n");
return -ENODATA;
}
if (test_started) {
struct net_if_test *data = iface->dev->driver_data;
DBG("Sending at iface %d %p\n", net_if_get_by_iface(iface),
iface);
if (net_pkt_iface(pkt) != iface) {
DBG("Invalid interface %p, expecting %p\n",
net_pkt_iface(pkt), iface);
test_failed = true;
}
if (net_if_get_by_iface(iface) != data->idx) {
DBG("Invalid interface %d index, expecting %d\n",
data->idx, net_if_get_by_iface(iface));
test_failed = true;
}
}
net_pkt_unref(pkt);
k_sem_give(&wait_data);
return 0;
}
static inline enum net_verdict process_data(struct net_pkt *pkt,
bool is_loopback)
{
int ret;
bool locally_routed = false;
#if defined(CONFIG_NET_IPV6_FRAGMENT)
/* If the packet is routed back to us when we have reassembled
* an IPv6 packet, then do not pass it to L2 as the packet does
* not have link layer headers in it.
*/
if (net_pkt_ipv6_fragment_start(pkt)) {
locally_routed = true;
}
#endif
/* If there is no data, then drop the packet. */
if (!pkt->frags) {
NET_DBG("Corrupted packet (frags %p)", pkt->frags);
net_stats_update_processing_error();
return NET_DROP;
}
if (!is_loopback && !locally_routed) {
ret = net_if_recv_data(net_pkt_iface(pkt), pkt);
if (ret != NET_CONTINUE) {
if (ret == NET_DROP) {
NET_DBG("Packet %p discarded by L2", pkt);
net_stats_update_processing_error();
}
return ret;
}
}
/* IP version and header length. */
switch (NET_IPV6_HDR(pkt)->vtc & 0xf0) {
#if defined(CONFIG_NET_IPV6)
case 0x60:
net_stats_update_ipv6_recv();
net_pkt_set_family(pkt, PF_INET6);
return net_ipv6_process_pkt(pkt);
#endif
#if defined(CONFIG_NET_IPV4)
case 0x40:
net_stats_update_ipv4_recv();
net_pkt_set_family(pkt, PF_INET);
return net_ipv4_process_pkt(pkt);
#endif
}
NET_DBG("Unknown IP family packet (0x%x)",
NET_IPV6_HDR(pkt)->vtc & 0xf0);
net_stats_update_ip_errors_protoerr();
net_stats_update_ip_errors_vhlerr();
return NET_DROP;
}
static int loopback_send(struct device *dev, struct net_pkt *pkt)
{
struct net_pkt *cloned;
int res;
ARG_UNUSED(dev);
if (!pkt->frags) {
LOG_ERR("No data to send");
return -ENODATA;
}
/* We need to swap the IP addresses because otherwise
* the packet will be dropped.
*/
if (net_pkt_family(pkt) == AF_INET6) {
struct in6_addr addr;
net_ipaddr_copy(&addr, &NET_IPV6_HDR(pkt)->src);
net_ipaddr_copy(&NET_IPV6_HDR(pkt)->src,
&NET_IPV6_HDR(pkt)->dst);
net_ipaddr_copy(&NET_IPV6_HDR(pkt)->dst, &addr);
} else {
struct in_addr addr;
net_ipaddr_copy(&addr, &NET_IPV4_HDR(pkt)->src);
net_ipaddr_copy(&NET_IPV4_HDR(pkt)->src,
&NET_IPV4_HDR(pkt)->dst);
net_ipaddr_copy(&NET_IPV4_HDR(pkt)->dst, &addr);
}
/* We should simulate normal driver meaning that if the packet is
* properly sent (which is always in this driver), then the packet
* must be dropped. This is very much needed for TCP packets where
* the packet is reference counted in various stages of sending.
*/
cloned = net_pkt_clone(pkt, K_MSEC(100));
if (!cloned) {
res = -ENOMEM;
goto out;
}
res = net_recv_data(net_pkt_iface(cloned), cloned);
if (res < 0) {
LOG_ERR("Data receive failed.");
}
out:
/* Let the receiving thread run now */
k_yield();
return res;
}
/* Called when data needs to be sent to network */
int net_send_data(struct net_pkt *pkt)
{
int status;
if (!pkt || !pkt->frags) {
return -ENODATA;
}
if (!net_pkt_iface(pkt)) {
return -EINVAL;
}
#if defined(CONFIG_NET_STATISTICS)
switch (net_pkt_family(pkt)) {
case AF_INET:
net_stats_update_ipv4_sent();
break;
case AF_INET6:
net_stats_update_ipv6_sent();
break;
}
#endif
status = check_ip_addr(pkt);
if (status < 0) {
return status;
} else if (status > 0) {
/* Packet is destined back to us so send it directly
* to RX processing.
*/
NET_DBG("Loopback pkt %p back to us", pkt);
processing_data(pkt, true);
return 0;
}
if (net_if_send_data(net_pkt_iface(pkt), pkt) == NET_DROP) {
return -EIO;
}
return 0;
}
static int eth_send(struct device *dev, struct net_pkt *pkt)
{
struct eth_context *ctx = dev->driver_data;
int count = net_pkt_get_len(pkt);
int ret;
ret = net_pkt_read(pkt, ctx->send, count);
if (ret) {
return ret;
}
update_gptp(net_pkt_iface(pkt), pkt, true);
LOG_DBG("Send pkt %p len %d", pkt, count);
ret = eth_write_data(ctx->dev_fd, ctx->send, count);
if (ret < 0) {
LOG_DBG("Cannot send pkt %p (%d)", pkt, ret);
}
return ret < 0 ? ret : 0;
}
struct net_pkt *net_ipv4_create(struct net_context *context,
struct net_pkt *pkt,
const struct in_addr *src,
const struct in_addr *dst)
{
NET_ASSERT(((struct sockaddr_in_ptr *)&context->local)->sin_addr);
if (!src) {
src = ((struct sockaddr_in_ptr *)&context->local)->sin_addr;
}
if (net_is_ipv4_addr_unspecified(src)
|| net_is_ipv4_addr_mcast(src)) {
src = &net_pkt_iface(pkt)->ipv4.unicast[0].address.in_addr;
}
return net_ipv4_create_raw(pkt,
src,
dst,
net_context_get_iface(context),
net_context_get_ip_proto(context));
}