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| author | Changli Gao <xiaosuo@gmail.com> | 2010-08-17 23:05:08 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-08-20 04:16:24 +0400 |
| commit | 78d3307eded853f01c5e9aaa8c0768c2f75825a3 (patch) | |
| tree | fe49617979b370786ce7c80b723acbc707ea6012 /net/sched/cls_flow.c | |
| parent | 12fcdefb3643607c47f39906a49056cf608bb545 (diff) | |
| download | linux-78d3307eded853f01c5e9aaa8c0768c2f75825a3.tar.xz | |
net_sched: cls_flow: use proto_ports_offset() to support AH message
Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_flow.c')
| -rw-r--r-- | net/sched/cls_flow.c | 67 |
1 files changed, 38 insertions, 29 deletions
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c index e17096e3913c..cd709f1294df 100644 --- a/net/sched/cls_flow.c +++ b/net/sched/cls_flow.c @@ -111,44 +111,41 @@ static u32 flow_get_proto(struct sk_buff *skb) } } -static int has_ports(u8 protocol) -{ - switch (protocol) { - case IPPROTO_TCP: - case IPPROTO_UDP: - case IPPROTO_UDPLITE: - case IPPROTO_SCTP: - case IPPROTO_DCCP: - case IPPROTO_ESP: - return 1; - default: - return 0; - } -} - static u32 flow_get_proto_src(struct sk_buff *skb) { switch (skb->protocol) { case htons(ETH_P_IP): { struct iphdr *iph; + int poff; if (!pskb_network_may_pull(skb, sizeof(*iph))) break; iph = ip_hdr(skb); - if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) && - has_ports(iph->protocol) && - pskb_network_may_pull(skb, iph->ihl * 4 + 2)) - return ntohs(*(__be16 *)((void *)iph + iph->ihl * 4)); + if (iph->frag_off & htons(IP_MF|IP_OFFSET)) + break; + poff = proto_ports_offset(iph->protocol); + if (poff >= 0 && + pskb_network_may_pull(skb, iph->ihl * 4 + 2 + poff)) { + iph = ip_hdr(skb); + return ntohs(*(__be16 *)((void *)iph + iph->ihl * 4 + + poff)); + } break; } case htons(ETH_P_IPV6): { struct ipv6hdr *iph; + int poff; - if (!pskb_network_may_pull(skb, sizeof(*iph) + 2)) + if (!pskb_network_may_pull(skb, sizeof(*iph))) break; iph = ipv6_hdr(skb); - if (has_ports(iph->nexthdr)) - return ntohs(*(__be16 *)&iph[1]); + poff = proto_ports_offset(iph->nexthdr); + if (poff >= 0 && + pskb_network_may_pull(skb, sizeof(*iph) + poff + 2)) { + iph = ipv6_hdr(skb); + return ntohs(*(__be16 *)((void *)iph + sizeof(*iph) + + poff)); + } break; } } @@ -161,24 +158,36 @@ static u32 flow_get_proto_dst(struct sk_buff *skb) switch (skb->protocol) { case htons(ETH_P_IP): { struct iphdr *iph; + int poff; if (!pskb_network_may_pull(skb, sizeof(*iph))) break; iph = ip_hdr(skb); - if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) && - has_ports(iph->protocol) && - pskb_network_may_pull(skb, iph->ihl * 4 + 4)) - return ntohs(*(__be16 *)((void *)iph + iph->ihl * 4 + 2)); + if (iph->frag_off & htons(IP_MF|IP_OFFSET)) + break; + poff = proto_ports_offset(iph->protocol); + if (poff >= 0 && + pskb_network_may_pull(skb, iph->ihl * 4 + 4 + poff)) { + iph = ip_hdr(skb); + return ntohs(*(__be16 *)((void *)iph + iph->ihl * 4 + + 2 + poff)); + } break; } case htons(ETH_P_IPV6): { struct ipv6hdr *iph; + int poff; - if (!pskb_network_may_pull(skb, sizeof(*iph) + 4)) + if (!pskb_network_may_pull(skb, sizeof(*iph))) break; iph = ipv6_hdr(skb); - if (has_ports(iph->nexthdr)) - return ntohs(*(__be16 *)((void *)&iph[1] + 2)); + poff = proto_ports_offset(iph->nexthdr); + if (poff >= 0 && + pskb_network_may_pull(skb, sizeof(*iph) + poff + 4)) { + iph = ipv6_hdr(skb); + return ntohs(*(__be16 *)((void *)iph + sizeof(*iph) + + poff + 2)); + } break; } } |