Lines Matching defs:skb
42 static int ip_forward_finish(struct sk_buff *skb)
44 struct ip_options * opt = &(IPCB(skb)->opt);
46 IP_INC_STATS_BH(dev_net(skb_dst(skb)->dev), IPSTATS_MIB_OUTFORWDATAGRAMS);
49 ip_forward_options(skb);
51 return dst_output(skb);
54 int ip_forward(struct sk_buff *skb)
58 struct ip_options * opt = &(IPCB(skb)->opt);
60 if (skb_warn_if_lro(skb))
63 if (!xfrm4_policy_check(NULL, XFRM_POLICY_FWD, skb))
66 if (IPCB(skb)->opt.router_alert && ip_call_ra_chain(skb))
69 if (skb->pkt_type != PACKET_HOST)
72 skb_forward_csum(skb);
79 if (ip_hdr(skb)->ttl <= 1)
82 if (!xfrm4_route_forward(skb))
85 rt = skb_rtable(skb);
90 if (unlikely(skb->len > dst_mtu(&rt->dst) && !skb_is_gso(skb) &&
91 (ip_hdr(skb)->frag_off & htons(IP_DF))) && !skb->local_df) {
93 icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
99 if (skb_cow(skb, LL_RESERVED_SPACE(rt->dst.dev)+rt->dst.header_len))
101 iph = ip_hdr(skb);
103 /* Decrease ttl after skb cow done */
110 if (rt->rt_flags&RTCF_DOREDIRECT && !opt->srr && !skb_sec_path(skb))
111 ip_rt_send_redirect(skb);
113 skb->priority = rt_tos2priority(iph->tos);
115 return NF_HOOK(NFPROTO_IPV4, NF_INET_FORWARD, skb, skb->dev,
122 icmp_send(skb, ICMP_DEST_UNREACH, ICMP_SR_FAILED, 0);
127 IP_INC_STATS_BH(dev_net(skb_dst(skb)->dev), IPSTATS_MIB_INHDRERRORS);
128 icmp_send(skb, ICMP_TIME_EXCEEDED, ICMP_EXC_TTL, 0);
130 kfree_skb(skb);