projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* SCTP kernel reference Implementation Copyright (C) 1999-2001 |
| 2 | * Cisco, Motorola, and IBM | |
| 3 | * Copyright 2001 La Monte H.P. Yarroll | |
| 4 | * | |
| 5 | * This file is part of the SCTP kernel reference Implementation | |
| 6 | * | |
| 7 | * These functions manipulate sctp command sequences. | |
| 8 | * | |
| 9 | * The SCTP reference 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) | |
| 13 | * any later version. | |
| 14 | * | |
| 15 | * The SCTP reference 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. | |
| 20 | * | |
| 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. | |
| 25 | * | |
| 26 | * Please send any bug reports or fixes you make to the | |
| 27 | * email address(es): | |
| 28 | * lksctp developers <[email protected]> | |
| 29 | * | |
| 30 | * Or submit a bug report through the following website: | |
| 31 | * http://www.sf.net/projects/lksctp | |
| 32 | * | |
| 33 | * Written or modified by: | |
| 34 | * La Monte H.P. Yarroll <[email protected]> | |
| 35 | * Karl Knutson <[email protected]> | |
| 36 | * | |
| 37 | * Any bugs reported given to us we will try to fix... any fixes shared will | |
| 38 | * be incorporated into the next SCTP release. | |
| 39 | */ | |
| 40 | ||
| 41 | #include <linux/types.h> | |
| 42 | #include <net/sctp/sctp.h> | |
| 43 | #include <net/sctp/sm.h> | |
| 44 | ||
| 45 | /* Initialize a block of memory as a command sequence. */ | |
| 46 | int sctp_init_cmd_seq(sctp_cmd_seq_t *seq) | |
| 47 | { | |
| 48 | memset(seq, 0, sizeof(sctp_cmd_seq_t)); | |
| 49 | return 1; /* We always succeed. */ | |
| 50 | } | |
| 51 | ||
| 52 | /* Add a command to a sctp_cmd_seq_t. | |
| 53 | * Return 0 if the command sequence is full. | |
| 54 | */ | |
| 55 | int sctp_add_cmd(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj) | |
| 56 | { | |
| 57 | if (seq->next_free_slot >= SCTP_MAX_NUM_COMMANDS) | |
| 58 | goto fail; | |
| 59 | ||
| 60 | seq->cmds[seq->next_free_slot].verb = verb; | |
| 61 | seq->cmds[seq->next_free_slot++].obj = obj; | |
| 62 | ||
| 63 | return 1; | |
| 64 | ||
| 65 | fail: | |
| 66 | return 0; | |
| 67 | } | |
| 68 | ||
| 69 | /* Return the next command structure in a sctp_cmd_seq. | |
| 70 | * Returns NULL at the end of the sequence. | |
| 71 | */ | |
| 72 | sctp_cmd_t *sctp_next_cmd(sctp_cmd_seq_t *seq) | |
| 73 | { | |
| 74 | sctp_cmd_t *retval = NULL; | |
| 75 | ||
| 76 | if (seq->next_cmd < seq->next_free_slot) | |
| 77 | retval = &seq->cmds[seq->next_cmd++]; | |
| 78 | ||
| 79 | return retval; | |
| 80 | } | |
| 81 |