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sctp: update mid instead of ssn when doing stream and asoc reset 

When using idata and doing stream and asoc reset, setting ssn with
0 could only clear the 1st 16 bits of mid.

So to make this work for both data and idata, it sets mid with 0
instead of ssn, and also mid_uo for unordered idata also need to
be cleared, as said in section 2.3.2 of RFC8260.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo R. Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2017-12-15 00:41:31 +08:00 committed by David S. Miller
parent ef4775e340
commit 107e242569
1 changed files with 25 additions and 15 deletions
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40
net/sctp/stream.c
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@ -216,11 +216,13 @@ void sctp_stream_clear(struct sctp_stream *stream)
{
int i;
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
for (i = 0; i < stream->outcnt; i++) {
stream->out[i].mid = 0;
stream->out[i].mid_uo = 0;
}
for (i = 0; i < stream->incnt; i++)
stream->in[i].ssn = 0;
stream->in[i].mid = 0;
}
void sctp_stream_update(struct sctp_stream *stream, struct sctp_stream *new)
@ -607,10 +609,10 @@ struct sctp_chunk *sctp_process_strreset_outreq(
}
for (i = 0; i < nums; i++)
stream->in[ntohs(str_p[i])].ssn = 0;
stream->in[ntohs(str_p[i])].mid = 0;
} else {
for (i = 0; i < stream->incnt; i++)
stream->in[i].ssn = 0;
stream->in[i].mid = 0;
}
result = SCTP_STRRESET_PERFORMED;
@ -783,10 +785,12 @@ struct sctp_chunk *sctp_process_strreset_tsnreq(
/* G5: The next expected and outgoing SSNs MUST be reset to 0 for all
* incoming and outgoing streams.
*/
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
for (i = 0; i < stream->outcnt; i++) {
stream->out[i].mid = 0;
stream->out[i].mid_uo = 0;
}
for (i = 0; i < stream->incnt; i++)
stream->in[i].ssn = 0;
stream->in[i].mid = 0;
result = SCTP_STRRESET_PERFORMED;
@ -976,11 +980,15 @@ struct sctp_chunk *sctp_process_strreset_resp(
if (result == SCTP_STRRESET_PERFORMED) {
if (nums) {
for (i = 0; i < nums; i++)
stream->out[ntohs(str_p[i])].ssn = 0;
for (i = 0; i < nums; i++) {
stream->out[ntohs(str_p[i])].mid = 0;
stream->out[ntohs(str_p[i])].mid_uo = 0;
}
} else {
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
for (i = 0; i < stream->outcnt; i++) {
stream->out[i].mid = 0;
stream->out[i].mid_uo = 0;
}
}
flags = SCTP_STREAM_RESET_OUTGOING_SSN;
@ -1041,10 +1049,12 @@ struct sctp_chunk *sctp_process_strreset_resp(
asoc->ctsn_ack_point = asoc->next_tsn - 1;
asoc->adv_peer_ack_point = asoc->ctsn_ack_point;
for (i = 0; i < stream->outcnt; i++)
stream->out[i].ssn = 0;
for (i = 0; i < stream->outcnt; i++) {
stream->out[i].mid = 0;
stream->out[i].mid_uo = 0;
}
for (i = 0; i < stream->incnt; i++)
stream->in[i].ssn = 0;
stream->in[i].mid = 0;
}
for (i = 0; i < stream->outcnt; i++)