1 /* SCTP kernel implementation Copyright (C) 1999-2001
2 * Cisco, Motorola, and IBM
3 * Copyright 2001 La Monte H.P. Yarroll
5 * This file is part of the SCTP kernel implementation
7 * These functions manipulate sctp command sequences.
9 * This SCTP implementation is free software;
10 * you can redistribute it and/or modify it under the terms of
11 * the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This SCTP implementation is distributed in the hope that it
16 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
17 * ************************
18 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19 * See the GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with GNU CC; see the file COPYING. If not, write to
23 * the Free Software Foundation, 59 Temple Place - Suite 330,
24 * Boston, MA 02111-1307, USA.
26 * Please send any bug reports or fixes you make to the
28 * lksctp developers <linux-sctp@vger.kernel.org>
30 * Written or modified by:
31 * La Monte H.P. Yarroll <piggy@acm.org>
32 * Karl Knutson <karl@athena.chicago.il.us>
35 #include <linux/types.h>
36 #include <net/sctp/sctp.h>
37 #include <net/sctp/sm.h>
39 /* Initialize a block of memory as a command sequence. */
40 int sctp_init_cmd_seq(sctp_cmd_seq_t *seq)
42 memset(seq, 0, sizeof(sctp_cmd_seq_t));
43 return 1; /* We always succeed. */
46 /* Add a command to a sctp_cmd_seq_t.
47 * Return 0 if the command sequence is full.
49 void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
51 BUG_ON(seq->next_free_slot >= SCTP_MAX_NUM_COMMANDS);
53 seq->cmds[seq->next_free_slot].verb = verb;
54 seq->cmds[seq->next_free_slot++].obj = obj;
57 /* Return the next command structure in a sctp_cmd_seq.
58 * Returns NULL at the end of the sequence.
60 sctp_cmd_t *sctp_next_cmd(sctp_cmd_seq_t *seq)
62 sctp_cmd_t *retval = NULL;
64 if (seq->next_cmd < seq->next_free_slot)
65 retval = &seq->cmds[seq->next_cmd++];