[IPV4]: Add ip_local_out
Most callers of the LOCAL_OUT chain will set the IP packet length and
header checksum before doing so. They also share the same output
function dst_output.
This patch creates a new function called ip_local_out which does all
of that and converts the appropriate users over to it.
Apart from removing duplicate code, it will also help in merging the
IPsec output path once the same thing is done for IPv6.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c
index dcf4d21..ccb2a03 100644
--- a/net/ipv4/netfilter/ipt_REJECT.c
+++ b/net/ipv4/netfilter/ipt_REJECT.c
@@ -90,7 +90,6 @@
/* Truncate to length (no data) */
tcph->doff = sizeof(struct tcphdr)/4;
skb_trim(nskb, ip_hdrlen(nskb) + sizeof(struct tcphdr));
- niph->tot_len = htons(nskb->len);
if (tcph->ack) {
needs_ack = 0;
@@ -139,18 +138,13 @@
/* Adjust IP TTL */
niph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT);
- /* Adjust IP checksum */
- niph->check = 0;
- niph->check = ip_fast_csum(skb_network_header(nskb), niph->ihl);
-
/* "Never happens" */
if (nskb->len > dst_mtu(nskb->dst))
goto free_nskb;
nf_ct_attach(nskb, oldskb);
- NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
- dst_output);
+ ip_local_out(nskb);
return;
free_nskb: