packet: deliver VLAN TCI to userspace
Store the VLAN tag in the auxillary data/tpacket2_hdr so userspace can
properly deal with hardware VLAN tagging/stripping.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_packet.h b/include/linux/if_packet.h
index d4d3c82..a630295 100644
--- a/include/linux/if_packet.h
+++ b/include/linux/if_packet.h
@@ -59,6 +59,7 @@
__u32 tp_snaplen;
__u16 tp_mac;
__u16 tp_net;
+ __u16 tp_vlan_tci;
};
struct tpacket_hdr
@@ -90,6 +91,7 @@
__u16 tp_net;
__u32 tp_sec;
__u32 tp_nsec;
+ __u16 tp_vlan_tci;
};
#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 4f05977..db792e0 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -702,6 +702,7 @@
getnstimeofday(&ts);
h.h2->tp_sec = ts.tv_sec;
h.h2->tp_nsec = ts.tv_nsec;
+ h.h2->tp_vlan_tci = skb->vlan_tci;
hdrlen = sizeof(*h.h2);
break;
default:
@@ -1172,6 +1173,7 @@
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
+ aux.tp_vlan_tci = skb->vlan_tci;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}