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sctp: implement receiver-side procedures for the Incoming SSN Reset Request Parameter
This patch is to implement Receiver-Side Procedures for the Incoming SSN Reset Request Parameter described in rfc6525 section 5.2.3. It's also to move str_list endian conversion out of sctp_make_strreset_req, so that sctp_make_strreset_req can be used more conveniently to process inreq. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
8105447645
commit
16e1a91965
3 changed files with 75 additions and 7 deletions
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@ -285,6 +285,10 @@ struct sctp_chunk *sctp_process_strreset_outreq(
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struct sctp_association *asoc,
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union sctp_params param,
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struct sctp_ulpevent **evp);
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struct sctp_chunk *sctp_process_strreset_inreq(
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struct sctp_association *asoc,
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union sctp_params param,
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struct sctp_ulpevent **evp);
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/* Prototypes for statetable processing. */
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@ -3617,7 +3617,7 @@ struct sctp_chunk *sctp_make_strreset_req(
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__u16 stream_len = stream_num * 2;
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struct sctp_strreset_inreq inreq;
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struct sctp_chunk *retval;
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__u16 outlen, inlen, i;
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__u16 outlen, inlen;
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outlen = (sizeof(outreq) + stream_len) * out;
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inlen = (sizeof(inreq) + stream_len) * in;
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@ -3626,9 +3626,6 @@ struct sctp_chunk *sctp_make_strreset_req(
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if (!retval)
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return NULL;
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for (i = 0; i < stream_num; i++)
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stream_list[i] = htons(stream_list[i]);
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if (outlen) {
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outreq.param_hdr.type = SCTP_PARAM_RESET_OUT_REQUEST;
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outreq.param_hdr.length = htons(outlen);
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@ -3653,9 +3650,6 @@ struct sctp_chunk *sctp_make_strreset_req(
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sctp_addto_chunk(retval, stream_len, stream_list);
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}
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for (i = 0; i < stream_num; i++)
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stream_list[i] = ntohs(stream_list[i]);
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return retval;
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}
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@ -135,7 +135,14 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
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if (str_list[i] >= stream->incnt)
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goto out;
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for (i = 0; i < str_nums; i++)
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str_list[i] = htons(str_list[i]);
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chunk = sctp_make_strreset_req(asoc, str_nums, str_list, out, in);
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for (i = 0; i < str_nums; i++)
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str_list[i] = ntohs(str_list[i]);
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if (!chunk) {
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retval = -ENOMEM;
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goto out;
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@ -407,3 +414,66 @@ struct sctp_chunk *sctp_process_strreset_outreq(
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out:
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return sctp_make_strreset_resp(asoc, result, request_seq);
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}
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struct sctp_chunk *sctp_process_strreset_inreq(
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struct sctp_association *asoc,
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union sctp_params param,
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struct sctp_ulpevent **evp)
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{
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struct sctp_strreset_inreq *inreq = param.v;
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struct sctp_stream *stream = asoc->stream;
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__u32 result = SCTP_STRRESET_DENIED;
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struct sctp_chunk *chunk = NULL;
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__u16 i, nums, *str_p;
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__u32 request_seq;
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request_seq = ntohl(inreq->request_seq);
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if (request_seq > asoc->strreset_inseq) {
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result = SCTP_STRRESET_ERR_BAD_SEQNO;
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goto out;
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} else if (request_seq == asoc->strreset_inseq) {
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asoc->strreset_inseq++;
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}
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if (!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ))
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goto out;
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if (asoc->strreset_outstanding) {
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result = SCTP_STRRESET_ERR_IN_PROGRESS;
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goto out;
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}
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nums = (ntohs(param.p->length) - sizeof(*inreq)) / 2;
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str_p = inreq->list_of_streams;
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for (i = 0; i < nums; i++) {
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if (ntohs(str_p[i]) >= stream->outcnt) {
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result = SCTP_STRRESET_ERR_WRONG_SSN;
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goto out;
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}
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}
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chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0);
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if (!chunk)
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goto out;
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if (nums)
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for (i = 0; i < nums; i++)
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stream->out[ntohs(str_p[i])].state =
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SCTP_STREAM_CLOSED;
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else
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for (i = 0; i < stream->outcnt; i++)
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stream->out[i].state = SCTP_STREAM_CLOSED;
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asoc->strreset_chunk = chunk;
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asoc->strreset_outstanding = 1;
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sctp_chunk_hold(asoc->strreset_chunk);
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*evp = sctp_ulpevent_make_stream_reset_event(asoc,
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SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC);
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out:
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if (!chunk)
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chunk = sctp_make_strreset_resp(asoc, result, request_seq);
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return chunk;
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}
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