| Willy Tarreau | dd81598 | 2007-10-16 12:25:14 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Protocol registration functions. |
| 3 | * |
| 4 | * Copyright 2000-2007 Willy Tarreau <w@1wt.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <string.h> |
| 15 | |
| 16 | #include <common/config.h> |
| 17 | #include <common/mini-clist.h> |
| 18 | #include <common/standard.h> |
| 19 | |
| 20 | #include <types/protocols.h> |
| 21 | |
| 22 | /* List head of all registered protocols */ |
| 23 | static struct list protocols = LIST_HEAD_INIT(protocols); |
| 24 | |
| 25 | /* Registers the protocol <proto> */ |
| 26 | void protocol_register(struct protocol *proto) |
| 27 | { |
| 28 | LIST_ADDQ(&protocols, &proto->list); |
| 29 | } |
| 30 | |
| 31 | /* Unregisters the protocol <proto>. Note that all listeners must have |
| 32 | * previously been unbound. |
| 33 | */ |
| 34 | void protocol_unregister(struct protocol *proto) |
| 35 | { |
| 36 | LIST_DEL(&proto->list); |
| 37 | LIST_INIT(&proto->list); |
| 38 | } |
| 39 | |
| 40 | /* binds all listeneres of all registered protocols. Returns a composition |
| 41 | * of ERR_NONE, ERR_RETRYABLE, ERR_FATAL. |
| 42 | */ |
| 43 | int protocol_bind_all(void) |
| 44 | { |
| 45 | struct protocol *proto; |
| 46 | int err; |
| 47 | |
| 48 | err = 0; |
| 49 | list_for_each_entry(proto, &protocols, list) { |
| 50 | if (proto->bind_all) |
| 51 | err |= proto->bind_all(proto); |
| 52 | } |
| 53 | return err; |
| 54 | } |
| 55 | |
| 56 | /* unbinds all listeners of all registered protocols. They are also closed. |
| 57 | * This must be performed before calling exit() in order to get a chance to |
| 58 | * remove file-system based sockets and pipes. |
| 59 | * Returns a composition of ERR_NONE, ERR_RETRYABLE, ERR_FATAL. |
| 60 | */ |
| 61 | int protocol_unbind_all(void) |
| 62 | { |
| 63 | struct protocol *proto; |
| 64 | int err; |
| 65 | |
| 66 | err = 0; |
| 67 | list_for_each_entry(proto, &protocols, list) { |
| 68 | if (proto->unbind_all) |
| 69 | err |= proto->unbind_all(proto); |
| 70 | } |
| 71 | return err; |
| 72 | } |
| 73 | |
| 74 | /* enables all listeners of all registered protocols. This is intended to be |
| 75 | * used after a fork() to enable reading on all file descriptors. Returns a |
| 76 | * composition of ERR_NONE, ERR_RETRYABLE, ERR_FATAL. |
| 77 | */ |
| 78 | int protocol_enable_all(void) |
| 79 | { |
| 80 | struct protocol *proto; |
| 81 | int err; |
| 82 | |
| 83 | err = 0; |
| 84 | list_for_each_entry(proto, &protocols, list) { |
| 85 | if (proto->enable_all) |
| 86 | err |= proto->enable_all(proto); |
| 87 | } |
| 88 | return err; |
| 89 | } |
| 90 | |