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1275 |
phoenix |
/* SCTP kernel reference Implementation Copyright (C) 1999-2001
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* Cisco, Motorola, and IBM
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* Copyright 2001 La Monte H.P. Yarroll
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*
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* This file is part of the SCTP kernel reference Implementation
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*
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* These functions manipulate sctp command sequences.
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*
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* The SCTP reference 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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* The SCTP reference 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, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* La Monte H.P. Yarroll <piggy@acm.org>
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* Karl Knutson <karl@athena.chicago.il.us>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#include <linux/types.h>
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#include <net/sctp/sctp.h>
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#include <net/sctp/sm.h>
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/* Create a new sctp_command_sequence. */
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sctp_cmd_seq_t *sctp_new_cmd_seq(int gfp)
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{
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sctp_cmd_seq_t *retval = t_new(sctp_cmd_seq_t, gfp);
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if (retval)
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sctp_init_cmd_seq(retval);
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return retval;
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}
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/* Initialize a block of memory as a command sequence. */
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int sctp_init_cmd_seq(sctp_cmd_seq_t *seq)
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{
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memset(seq, 0, sizeof(sctp_cmd_seq_t));
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return 1; /* We always succeed. */
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}
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/* Add a command to a sctp_cmd_seq_t.
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* Return 0 if the command sequence is full.
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*/
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int sctp_add_cmd(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
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{
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if (seq->next_free_slot >= SCTP_MAX_NUM_COMMANDS)
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goto fail;
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seq->cmds[seq->next_free_slot].verb = verb;
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seq->cmds[seq->next_free_slot++].obj = obj;
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return 1;
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fail:
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return 0;
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}
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/* Rewind an sctp_cmd_seq_t to iterate from the start. */
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int sctp_rewind_sequence(sctp_cmd_seq_t *seq)
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{
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seq->next_cmd = 0;
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return 1; /* We always succeed. */
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}
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/* Return the next command structure in a sctp_cmd_seq.
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* Returns NULL at the end of the sequence.
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*/
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sctp_cmd_t *sctp_next_cmd(sctp_cmd_seq_t *seq)
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{
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sctp_cmd_t *retval = NULL;
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if (seq->next_cmd < seq->next_free_slot)
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retval = &seq->cmds[seq->next_cmd++];
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return retval;
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}
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/* Dispose of a command sequence. */
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void sctp_free_cmd_seq(sctp_cmd_seq_t *seq)
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{
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kfree(seq);
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}
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