diff options
| author | Or Gerlitz <ogerlitz@mellanox.com> | 2017-06-01 21:37:37 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-04 18:12:23 -0400 |
| commit | 518d8a2e9bad83c6040eccebc3d1f7388fc034e7 (patch) | |
| tree | 1f10a6e3e6da7803e931bf5c363ae7397d524ec0 /net/core | |
| parent | f4d01666616adeebe72f84ee6e9385e309805ba5 (diff) | |
net/flow_dissector: add support for dissection of misc ip header fields
Add support for dissection of ip tos and ttl and ipv6 traffic-class
and hoplimit. Both are dissected into the same struct.
Uses similar call to ip dissection function as with tcp, arp and others.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/flow_dissector.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 5a45943081f5..fc5fc4594c90 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -367,6 +367,40 @@ __skb_flow_dissect_tcp(const struct sk_buff *skb, key_tcp->flags = (*(__be16 *) &tcp_flag_word(th) & htons(0x0FFF)); } +static void +__skb_flow_dissect_ipv4(const struct sk_buff *skb, + struct flow_dissector *flow_dissector, + void *target_container, void *data, const struct iphdr *iph) +{ + struct flow_dissector_key_ip *key_ip; + + if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_IP)) + return; + + key_ip = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_IP, + target_container); + key_ip->tos = iph->tos; + key_ip->ttl = iph->ttl; +} + +static void +__skb_flow_dissect_ipv6(const struct sk_buff *skb, + struct flow_dissector *flow_dissector, + void *target_container, void *data, const struct ipv6hdr *iph) +{ + struct flow_dissector_key_ip *key_ip; + + if (!dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_IP)) + return; + + key_ip = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_IP, + target_container); + key_ip->tos = ipv6_get_dsfield(iph); + key_ip->ttl = iph->hop_limit; +} + /** * __skb_flow_dissect - extract the flow_keys struct and return it * @skb: sk_buff to extract the flow from, can be NULL if the rest are specified @@ -469,6 +503,9 @@ ip: } } + __skb_flow_dissect_ipv4(skb, flow_dissector, + target_container, data, iph); + if (flags & FLOW_DISSECTOR_F_STOP_AT_L3) goto out_good; @@ -514,6 +551,9 @@ ipv6: goto out_good; } + __skb_flow_dissect_ipv6(skb, flow_dissector, + target_container, data, iph); + if (flags & FLOW_DISSECTOR_F_STOP_AT_L3) goto out_good; |