Commit 6b2f9cb6 authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller

[SCTP]: Tie ADD-IP and AUTH functionality as required by spec.

ADD-IP spec requires AUTH. It is, in fact, dangerous without AUTH.
So, disable ADD-IP functionality if the peer claims to support
ADD-IP, but not AUTH.
Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 65b07e5d
......@@ -1543,6 +1543,7 @@ struct sctp_association {
__u8 asconf_capable; /* Does peer support ADDIP? */
__u8 prsctp_capable; /* Can peer do PR-SCTP? */
__u8 auth_capable; /* Is peer doing SCTP-AUTH? */
__u8 addip_capable; /* Can peer do ADD-IP */
__u32 adaptation_ind; /* Adaptation Code point. */
......
......@@ -1851,7 +1851,8 @@ static void sctp_process_ext_param(struct sctp_association *asoc,
break;
case SCTP_CID_ASCONF:
case SCTP_CID_ASCONF_ACK:
/* don't need to do anything for ASCONF */
asoc->peer.addip_capable = 1;
break;
default:
break;
}
......@@ -2137,6 +2138,16 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
!asoc->peer.peer_hmacs))
asoc->peer.auth_capable = 0;
/* If the peer claims support for ADD-IP without support
* for AUTH, disable support for ADD-IP.
*/
if (asoc->peer.addip_capable && !asoc->peer.auth_capable) {
asoc->peer.addip_disabled_mask |= (SCTP_PARAM_ADD_IP |
SCTP_PARAM_DEL_IP |
SCTP_PARAM_SET_PRIMARY);
}
/* Walk list of transports, removing transports in the UNKNOWN state. */
list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {
transport = list_entry(pos, struct sctp_transport, transports);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment