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| author | Tom Herbert | 2015-09-01 18:24:29 +0200 |
|---|---|---|
| committer | David S. Miller | 2015-09-02 00:06:22 +0200 |
| commit | b840f28b908da0239c8c5d9c8cae362ad21cda97 (patch) | |
| tree | 66608d91eccb337df6e81f19c5946b5ad778cd44 /net/core | |
| parent | flow_dissector: Add control/reporting of fragmentation (diff) | |
| download | kernel-qcow2-linux-b840f28b908da0239c8c5d9c8cae362ad21cda97.tar.gz kernel-qcow2-linux-b840f28b908da0239c8c5d9c8cae362ad21cda97.tar.xz kernel-qcow2-linux-b840f28b908da0239c8c5d9c8cae362ad21cda97.zip | |
flow_dissector: Support IPv6 fragment header
Parse NEXTHDR_FRAGMENT. When seen account for it in the fragment bits of
key_control. Also, check if first fragment should be parsed.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/flow_dissector.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 7536a4669029..907de2f68b1f 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -409,6 +409,31 @@ ip_proto_again: goto ip_proto_again; } + case NEXTHDR_FRAGMENT: { + struct frag_hdr _fh, *fh; + + if (proto != htons(ETH_P_IPV6)) + break; + + fh = __skb_header_pointer(skb, nhoff, sizeof(_fh), + data, hlen, &_fh); + + if (!fh) + goto out_bad; + + key_control->is_fragment = 1; + + nhoff += sizeof(_fh); + + if (!(fh->frag_off & htons(IP6_OFFSET))) { + key_control->first_frag = 1; + if (flags & FLOW_DISSECTOR_F_PARSE_1ST_FRAG) { + ip_proto = fh->nexthdr; + goto ip_proto_again; + } + } + goto out_good; + } case IPPROTO_IPIP: proto = htons(ETH_P_IP); goto ip; |