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Message-Id: <1197927169-5106-2-git-send-email-vladislav.yasevich@hp.com> Date: Mon, 17 Dec 2007 16:32:41 -0500 From: Vlad Yasevich <vladislav.yasevich@...com> To: netdev@...r.kernel.org Cc: lksctp-developers@...ts.sourceforge.net, Vlad Yasevich <vladislav.yasevich@...com> Subject: [PATCH 2.6.25 1/9] 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@...com> --- 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 5fb8477..859be75 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -3399,6 +3399,15 @@ 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, @@ -3485,6 +3494,15 @@ 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, -- 1.5.3.5 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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