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net: socket: packet: Add support to SOCK_DGRAM packet sockets

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Allow user to create SOCK_DGRAM type AF_PACKET socket. This
allows user to send raw IP packets without specifying
L2 (like Ethernet) headers.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2020-06-14 12:51:04 +03:00 • committed by Jukka Rissanen
commit 2ba4d5c2f0
5 changed files with 109 additions and 24 deletions
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23
subsys/net/l2/ethernet/ethernet.c
View file

@ -594,7 +594,28 @@ static int ethernet_send(struct net_if *iface, struct net_pkt *pkt)
ptype = htons(NET_ETH_PTYPE_IPV6);
} else if (IS_ENABLED(CONFIG_NET_SOCKETS_PACKET) &&
net_pkt_family(pkt) == AF_PACKET) {
goto send;
struct net_context *context = net_pkt_context(pkt);
if (context && net_context_get_type(context) == SOCK_DGRAM) {
struct sockaddr_ll *dst_addr;
struct sockaddr_ll_ptr *src_addr;
/* The destination address is set in remote for this
* socket type.
*/
dst_addr = (struct sockaddr_ll *)&context->remote;
src_addr = (struct sockaddr_ll_ptr *)&context->local;
net_pkt_lladdr_dst(pkt)->addr = dst_addr->sll_addr;
net_pkt_lladdr_dst(pkt)->len =
sizeof(struct net_eth_addr);
net_pkt_lladdr_src(pkt)->addr = src_addr->sll_addr;
net_pkt_lladdr_src(pkt)->len =
sizeof(struct net_eth_addr);
ptype = dst_addr->sll_protocol;
} else {
goto send;
}
} else if (IS_ENABLED(CONFIG_NET_GPTP) && net_pkt_is_gptp(pkt)) {
ptype = htons(NET_ETH_PTYPE_PTP);
} else if (IS_ENABLED(CONFIG_NET_LLDP) && net_pkt_is_lldp(pkt)) {