diff options
Diffstat (limited to 'net/sctp/stream_interleave.c')
| -rw-r--r-- | net/sctp/stream_interleave.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c index 397c3c1789b3..3ac47e78c013 100644 --- a/net/sctp/stream_interleave.c +++ b/net/sctp/stream_interleave.c @@ -57,16 +57,53 @@ static struct sctp_chunk *sctp_make_idatafrag_empty( return retval; } +static void sctp_chunk_assign_mid(struct sctp_chunk *chunk) +{ + struct sctp_stream *stream; + struct sctp_chunk *lchunk; + __u32 cfsn = 0; + __u16 sid; + + if (chunk->has_mid) + return; + + sid = sctp_chunk_stream_no(chunk); + stream = &chunk->asoc->stream; + + list_for_each_entry(lchunk, &chunk->msg->chunks, frag_list) { + struct sctp_idatahdr *hdr; + + lchunk->has_mid = 1; + + if (lchunk->chunk_hdr->flags & SCTP_DATA_UNORDERED) + continue; + + hdr = lchunk->subh.idata_hdr; + + if (lchunk->chunk_hdr->flags & SCTP_DATA_FIRST_FRAG) + hdr->ppid = lchunk->sinfo.sinfo_ppid; + else + hdr->fsn = htonl(cfsn++); + + if (lchunk->chunk_hdr->flags & SCTP_DATA_LAST_FRAG) + hdr->mid = htonl(sctp_mid_next(stream, out, sid)); + else + hdr->mid = htonl(sctp_mid_peek(stream, out, sid)); + } +} + static struct sctp_stream_interleave sctp_stream_interleave_0 = { .data_chunk_len = sizeof(struct sctp_data_chunk), /* DATA process functions */ .make_datafrag = sctp_make_datafrag_empty, + .assign_number = sctp_chunk_assign_ssn, }; static struct sctp_stream_interleave sctp_stream_interleave_1 = { .data_chunk_len = sizeof(struct sctp_idata_chunk), /* I-DATA process functions */ .make_datafrag = sctp_make_idatafrag_empty, + .assign_number = sctp_chunk_assign_mid, }; void sctp_stream_interleave_init(struct sctp_stream *stream) |