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[SK_BUFF]: Introduce skb_network_offset()

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For the quite common 'skb->nh.raw - skb->data' sequence.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-03-10 22:16:10 -03:00 • committed by David S. Miller
parent e7dd65dafd
commit bbe735e424
18 changed files with 33 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

8
net/packet/af_packet.c
View file

@ -491,7 +491,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
skb_push(skb, skb->data - skb_mac_header(skb));
else if (skb->pkt_type == PACKET_OUTGOING) {
/* Special case: outgoing packets have ll header at head */
skb_pull(skb, skb->nh.raw - skb->data);
skb_pull(skb, skb_network_offset(skb));
}
}
@ -595,7 +595,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
skb_push(skb, skb->data - skb_mac_header(skb));
else if (skb->pkt_type == PACKET_OUTGOING) {
/* Special case: outgoing packets have ll header at head */
skb_pull(skb, skb->nh.raw - skb->data);
skb_pull(skb, skb_network_offset(skb));
}
}
@ -613,7 +613,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
if (sk->sk_type == SOCK_DGRAM) {
macoff = netoff = TPACKET_ALIGN(TPACKET_HDRLEN) + 16;
} else {
unsigned maclen = skb->nh.raw - skb->data;
unsigned maclen = skb_network_offset(skb);
netoff = TPACKET_ALIGN(TPACKET_HDRLEN + (maclen < 16 ? 16 : maclen));
macoff = netoff - maclen;
}
@ -1145,7 +1145,7 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb->nh.raw - skb->data;
aux.tp_net = skb_network_offset(skb);
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}