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| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-03-22 08:24:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-24 17:16:30 -0400 |
| commit | be991971d53e0f5b6d13e3940192054216590072 (patch) | |
| tree | 8d8b92e82104a51d0954a4f062d758efed6ee2a4 /net/ipv4/inet_fragment.c | |
| parent | 63998ac24f8370caf99e433483532bab8368eb7e (diff) | |
| download | linux-be991971d53e0f5b6d13e3940192054216590072.tar.gz linux-be991971d53e0f5b6d13e3940192054216590072.tar.bz2 linux-be991971d53e0f5b6d13e3940192054216590072.zip | |
inet: generalize ipv4-only RFC3168 5.3 ecn fragmentation handling for future use by ipv6
This patch just moves some code arround to make the ip4_frag_ecn_table
and IPFRAG_ECN_* constants accessible from the other reassembly engines. I
also renamed ip4_frag_ecn_table to ip_frag_ecn_table.
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jesper Dangaard Brouer <jbrouer@redhat.com>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_fragment.c')
| -rw-r--r-- | net/ipv4/inet_fragment.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c index f4fd23de9b13..2bff045bec60 100644 --- a/net/ipv4/inet_fragment.c +++ b/net/ipv4/inet_fragment.c @@ -23,6 +23,28 @@ #include <net/sock.h> #include <net/inet_frag.h> +#include <net/inet_ecn.h> + +/* Given the OR values of all fragments, apply RFC 3168 5.3 requirements + * Value : 0xff if frame should be dropped. + * 0 or INET_ECN_CE value, to be ORed in to final iph->tos field + */ +const u8 ip_frag_ecn_table[16] = { + /* at least one fragment had CE, and others ECT_0 or ECT_1 */ + [IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0] = INET_ECN_CE, + [IPFRAG_ECN_CE | IPFRAG_ECN_ECT_1] = INET_ECN_CE, + [IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0 | IPFRAG_ECN_ECT_1] = INET_ECN_CE, + + /* invalid combinations : drop frame */ + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE] = 0xff, + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_ECT_0] = 0xff, + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_ECT_1] = 0xff, + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_ECT_0 | IPFRAG_ECN_ECT_1] = 0xff, + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0] = 0xff, + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE | IPFRAG_ECN_ECT_1] = 0xff, + [IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0 | IPFRAG_ECN_ECT_1] = 0xff, +}; +EXPORT_SYMBOL(ip_frag_ecn_table); static void inet_frag_secret_rebuild(unsigned long dummy) { |