165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
/* SCTP kernel implementation
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* (C) Copyright IBM Corp. 2001, 2004
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* Copyright (c) 1999-2000 Cisco, Inc.
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* Copyright (c) 1999-2001 Motorola, Inc.
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* Copyright (c) 2001 Intel Corp.
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*
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* This file is part of the SCTP kernel implementation
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*
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* These functions manipulate sctp tsn mapping array.
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*
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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <linux-sctp@vger.kernel.org>
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*
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* Written or modified by:
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* Xin Long <lucien.xin@gmail.com>
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*/
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#include <net/sctp/sctp.h>
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#include <net/sctp/sm.h>
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struct sctp_stream *sctp_stream_new(__u16 incnt, __u16 outcnt, gfp_t gfp)
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{
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struct sctp_stream *stream;
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int i;
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stream = kzalloc(sizeof(*stream), gfp);
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if (!stream)
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return NULL;
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stream->outcnt = outcnt;
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stream->out = kcalloc(stream->outcnt, sizeof(*stream->out), gfp);
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if (!stream->out) {
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kfree(stream);
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return NULL;
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}
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for (i = 0; i < stream->outcnt; i++)
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stream->out[i].state = SCTP_STREAM_OPEN;
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stream->incnt = incnt;
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stream->in = kcalloc(stream->incnt, sizeof(*stream->in), gfp);
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if (!stream->in) {
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kfree(stream->out);
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kfree(stream);
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return NULL;
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}
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return stream;
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}
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void sctp_stream_free(struct sctp_stream *stream)
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{
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if (unlikely(!stream))
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return;
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kfree(stream->out);
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kfree(stream->in);
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kfree(stream);
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}
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void sctp_stream_clear(struct sctp_stream *stream)
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{
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int i;
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for (i = 0; i < stream->outcnt; i++)
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stream->out[i].ssn = 0;
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for (i = 0; i < stream->incnt; i++)
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stream->in[i].ssn = 0;
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}
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static int sctp_send_reconf(struct sctp_association *asoc,
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struct sctp_chunk *chunk)
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{
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struct net *net = sock_net(asoc->base.sk);
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int retval = 0;
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retval = sctp_primitive_RECONF(net, asoc, chunk);
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if (retval)
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sctp_chunk_free(chunk);
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return retval;
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}
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int sctp_send_reset_streams(struct sctp_association *asoc,
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struct sctp_reset_streams *params)
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{
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struct sctp_stream *stream = asoc->stream;
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__u16 i, str_nums, *str_list;
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struct sctp_chunk *chunk;
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int retval = -EINVAL;
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bool out, in;
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if (!asoc->peer.reconf_capable ||
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!(asoc->strreset_enable & SCTP_ENABLE_RESET_STREAM_REQ)) {
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retval = -ENOPROTOOPT;
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goto out;
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}
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if (asoc->strreset_outstanding) {
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retval = -EINPROGRESS;
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goto out;
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}
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out = params->srs_flags & SCTP_STREAM_RESET_OUTGOING;
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in = params->srs_flags & SCTP_STREAM_RESET_INCOMING;
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if (!out && !in)
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goto out;
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str_nums = params->srs_number_streams;
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str_list = params->srs_stream_list;
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if (out && str_nums)
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for (i = 0; i < str_nums; i++)
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if (str_list[i] >= stream->outcnt)
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goto out;
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if (in && str_nums)
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for (i = 0; i < str_nums; i++)
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if (str_list[i] >= stream->incnt)
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goto out;
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chunk = sctp_make_strreset_req(asoc, str_nums, str_list, out, in);
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if (!chunk)
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goto out;
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if (out) {
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if (str_nums)
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for (i = 0; i < str_nums; i++)
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stream->out[str_list[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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}
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asoc->strreset_outstanding = out + in;
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asoc->strreset_chunk = chunk;
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sctp_chunk_hold(asoc->strreset_chunk);
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retval = sctp_send_reconf(asoc, chunk);
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if (retval) {
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sctp_chunk_put(asoc->strreset_chunk);
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asoc->strreset_chunk = NULL;
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}
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out:
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return retval;
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}
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