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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-12-21 01:08:04 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-29 01:59:19 +0300 |
| commit | 6afd2e83cd86b17b074e1854d063b8ec590d7f5b (patch) | |
| tree | 9044224e2dab7c8441bed42491a1158ce1ff1dbb /net/sctp/sm_statefuns.c | |
| parent | 195ad6a3ac8b5c4eef4916efcb673e96e6f09d89 (diff) | |
| download | linux-6afd2e83cd86b17b074e1854d063b8ec590d7f5b.tar.xz | |
[SCTP]: Discard unauthenticated ASCONF and ASCONF ACK chunks
Now that we support AUTH, discard unauthenticated ASCONF and ASCONF ACK
chunks as mandated in the ADD-IP spec.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/sm_statefuns.c')
| -rw-r--r-- | net/sctp/sm_statefuns.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index d247ed4ee423..b6aaa7e97d82 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -3377,6 +3377,15 @@ sctp_disposition_t sctp_sf_do_asconf(const struct sctp_endpoint *ep, return sctp_sf_pdiscard(ep, asoc, type, arg, commands); } + /* ADD-IP: Section 4.1.1 + * This chunk MUST be sent in an authenticated way by using + * the mechanism defined in [I-D.ietf-tsvwg-sctp-auth]. If this chunk + * is received unauthenticated it MUST be silently discarded as + * described in [I-D.ietf-tsvwg-sctp-auth]. + */ + if (!sctp_addip_noauth && !chunk->auth) + return sctp_sf_discard_chunk(ep, asoc, type, arg, commands); + /* Make sure that the ASCONF ADDIP chunk has a valid length. */ if (!sctp_chunk_length_valid(chunk, sizeof(sctp_addip_chunk_t))) return sctp_sf_violation_chunklen(ep, asoc, type, arg, @@ -3463,6 +3472,15 @@ sctp_disposition_t sctp_sf_do_asconf_ack(const struct sctp_endpoint *ep, return sctp_sf_pdiscard(ep, asoc, type, arg, commands); } + /* ADD-IP, Section 4.1.2: + * This chunk MUST be sent in an authenticated way by using + * the mechanism defined in [I-D.ietf-tsvwg-sctp-auth]. If this chunk + * is received unauthenticated it MUST be silently discarded as + * described in [I-D.ietf-tsvwg-sctp-auth]. + */ + if (!sctp_addip_noauth && !asconf_ack->auth) + return sctp_sf_discard_chunk(ep, asoc, type, arg, commands); + /* Make sure that the ADDIP chunk has a valid length. */ if (!sctp_chunk_length_valid(asconf_ack, sizeof(sctp_addip_chunk_t))) return sctp_sf_violation_chunklen(ep, asoc, type, arg, |