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flow_dissector: add support for dst, hop-by-hop and routing ext hdrs

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If dst, hop-by-hop or routing extension headers are present determine
length of the options and skip over them in flow dissection.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-06-12 09:01:06 -07:00 committed by David S. Miller
parent 611d23c559
commit 6a74fcf426
1 changed files with 17 additions and 0 deletions
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17
net/core/flow_dissector.c
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@ -327,6 +327,7 @@ bool __skb_flow_dissect(const struct sk_buff *skb,
return false;
}
ip_proto_again:
switch (ip_proto) {
case IPPROTO_GRE: {
struct gre_hdr {
@ -383,6 +384,22 @@ bool __skb_flow_dissect(const struct sk_buff *skb,
}
goto again;
}
case NEXTHDR_HOP:
case NEXTHDR_ROUTING:
case NEXTHDR_DEST: {
u8 _opthdr[2], *opthdr;
if (proto != htons(ETH_P_IPV6))
break;
opthdr = __skb_header_pointer(skb, nhoff, sizeof(_opthdr),
data, hlen, &_opthdr);
ip_proto = _opthdr[0];
nhoff += (_opthdr[1] + 1) << 3;
goto ip_proto_again;
}
case IPPROTO_IPIP:
proto = htons(ETH_P_IP);
goto ip;