Michal Kubecek <mkubecek@xxxxxxx> wrote:
> + case SCTP_CID_HEARTBEAT:
> + pr_debug("SCTP_CID_HEARTBEAT");
> + i = 9;
> + break;
> + case SCTP_CID_HEARTBEAT_ACK:
> + pr_debug("SCTP_CID_HEARTBEAT_ACK");
> + i = 10;
> + break;
> default:
> /* Other chunks like DATA, SACK, HEARTBEAT and
> its ACK do not cause a change in state */
> @@ -329,6 +351,8 @@ static int sctp_packet(struct nf_conn *ct,
> !test_bit(SCTP_CID_COOKIE_ECHO, map) &&
> !test_bit(SCTP_CID_ABORT, map) &&
> !test_bit(SCTP_CID_SHUTDOWN_ACK, map) &&
> + !test_bit(SCTP_CID_HEARTBEAT, map) &&
> + !test_bit(SCTP_CID_HEARTBEAT_ACK, map) &&
> sh->vtag != ct->proto.sctp.vtag[dir]) {
> pr_debug("Verification tag check failed\n");
> goto out;
> @@ -357,6 +381,16 @@ static int sctp_packet(struct nf_conn *ct,
> /* Sec 8.5.1 (D) */
> if (sh->vtag != ct->proto.sctp.vtag[dir])
> goto out_unlock;
> + } else if (sch->type == SCTP_CID_HEARTBEAT ||
> + sch->type == SCTP_CID_HEARTBEAT_ACK) {
> + if (ct->proto.sctp.vtag[dir] == 0) {
> + pr_debug("Setting vtag %x for dir %d\n",
> + sh->vtag, dir);
> + ct->proto.sctp.vtag[dir] = sh->vtag;
Could you please elaborate on the [dir] == 0 test?
I see this might happen for SCTP_CID_HEARTBEAT_ACK, but why is this
needed for SCTP_CID_HEARTBEAT ?
We found a conntrack entry so shouldn't the vtag[dir] already be > 0?
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