Commit 6afd2e83 authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller
Browse files

[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: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 195ad6a3

net/sctp/sm_statefuns.c

+18 −0
Original line number Diff line number Diff line
@@ -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,