linux/net/tipc/subscr.h
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   1/*
   2 * net/tipc/subscr.h: Include file for TIPC network topology service
   3 *
   4 * Copyright (c) 2003-2006, Ericsson AB
   5 * Copyright (c) 2005-2007, Wind River Systems
   6 * All rights reserved.
   7 *
   8 * Redistribution and use in source and binary forms, with or without
   9 * modification, are permitted provided that the following conditions are met:
  10 *
  11 * 1. Redistributions of source code must retain the above copyright
  12 *    notice, this list of conditions and the following disclaimer.
  13 * 2. Redistributions in binary form must reproduce the above copyright
  14 *    notice, this list of conditions and the following disclaimer in the
  15 *    documentation and/or other materials provided with the distribution.
  16 * 3. Neither the names of the copyright holders nor the names of its
  17 *    contributors may be used to endorse or promote products derived from
  18 *    this software without specific prior written permission.
  19 *
  20 * Alternatively, this software may be distributed under the terms of the
  21 * GNU General Public License ("GPL") version 2 as published by the Free
  22 * Software Foundation.
  23 *
  24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34 * POSSIBILITY OF SUCH DAMAGE.
  35 */
  36
  37#ifndef _TIPC_SUBSCR_H
  38#define _TIPC_SUBSCR_H
  39
  40struct subscription;
  41
  42typedef void (*tipc_subscr_event) (struct subscription *sub,
  43                                   u32 found_lower, u32 found_upper,
  44                                   u32 event, u32 port_ref, u32 node);
  45
  46/**
  47 * struct subscription - TIPC network topology subscription object
  48 * @seq: name sequence associated with subscription
  49 * @timeout: duration of subscription (in ms)
  50 * @filter: event filtering to be done for subscription
  51 * @event_cb: routine invoked when a subscription event is detected
  52 * @timer: timer governing subscription duration (optional)
  53 * @nameseq_list: adjacent subscriptions in name sequence's subscription list
  54 * @subscription_list: adjacent subscriptions in subscriber's subscription list
  55 * @server_ref: object reference of server port associated with subscription
  56 * @swap: indicates if subscriber uses opposite endianness in its messages
  57 * @evt: template for events generated by subscription
  58 */
  59
  60struct subscription {
  61        struct tipc_name_seq seq;
  62        u32 timeout;
  63        u32 filter;
  64        tipc_subscr_event event_cb;
  65        struct timer_list timer;
  66        struct list_head nameseq_list;
  67        struct list_head subscription_list;
  68        u32 server_ref;
  69        int swap;
  70        struct tipc_event evt;
  71};
  72
  73int tipc_subscr_overlap(struct subscription *sub,
  74                        u32 found_lower,
  75                        u32 found_upper);
  76
  77void tipc_subscr_report_overlap(struct subscription *sub,
  78                                u32 found_lower,
  79                                u32 found_upper,
  80                                u32 event,
  81                                u32 port_ref,
  82                                u32 node,
  83                                int must_report);
  84
  85int tipc_subscr_start(void);
  86
  87void tipc_subscr_stop(void);
  88
  89
  90#endif
  91
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