From 047a2428a14216a83980ed26b6a59b3ca40a1fb0 Mon Sep 17 00:00:00 2001 From: Jerome Forissier Date: Thu, 28 Apr 2005 11:58:43 -0700 Subject: [SCTP] Implement Sec 2.41 of SCTP Implementers guide. - Fixed sctp_vtag_verify_either() to comply with impguide 2.41 B) and C). - Make sure vtag is reflected when T-bit is set in SHUTDOWN-COMPLETE sent due to an OOTB SHUTDOWN-ACK and in ABORT sent due to an OOTB packet. - Do not set T-Bit in ABORT chunk in response to INIT. - Fixed some comments to reflect the new meaning of the T-Bit. Signed-off-by: Jerome Forissier Signed-off-by: Sridhar Samudrala Signed-off-by: David S. Miller --- net/sctp/sm_make_chunk.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) (limited to 'net/sctp/sm_make_chunk.c') diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c index 1db12cc18cf7..33ac8bf47b0e 100644 --- a/net/sctp/sm_make_chunk.c +++ b/net/sctp/sm_make_chunk.c @@ -710,7 +710,9 @@ struct sctp_chunk *sctp_make_shutdown_complete( struct sctp_chunk *retval; __u8 flags = 0; - /* Maybe set the T-bit if we have no association. */ + /* Set the T-bit if we have no association (vtag will be + * reflected) + */ flags |= asoc ? 0 : SCTP_CHUNK_FLAG_T; retval = sctp_make_chunk(asoc, SCTP_CID_SHUTDOWN_COMPLETE, flags, 0); @@ -732,7 +734,7 @@ struct sctp_chunk *sctp_make_shutdown_complete( } /* Create an ABORT. Note that we set the T bit if we have no - * association. + * association, except when responding to an INIT (sctpimpguide 2.41). */ struct sctp_chunk *sctp_make_abort(const struct sctp_association *asoc, const struct sctp_chunk *chunk, @@ -741,8 +743,16 @@ struct sctp_chunk *sctp_make_abort(const struct sctp_association *asoc, struct sctp_chunk *retval; __u8 flags = 0; - /* Maybe set the T-bit if we have no association. */ - flags |= asoc ? 0 : SCTP_CHUNK_FLAG_T; + /* Set the T-bit if we have no association and 'chunk' is not + * an INIT (vtag will be reflected). + */ + if (!asoc) { + if (chunk && chunk->chunk_hdr && + chunk->chunk_hdr->type == SCTP_CID_INIT) + flags = 0; + else + flags = SCTP_CHUNK_FLAG_T; + } retval = sctp_make_chunk(asoc, SCTP_CID_ABORT, flags, hint); @@ -2744,7 +2754,6 @@ struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc, hint = (nstreams + 1) * sizeof(__u32); - /* Maybe set the T-bit if we have no association. */ retval = sctp_make_chunk(asoc, SCTP_CID_FWD_TSN, 0, hint); if (!retval) -- cgit v1.2.3