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130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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* Protocol registration functions.
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*
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* Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <common/config.h>
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#include <common/errors.h>
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#include <common/mini-clist.h>
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#include <common/standard.h>
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#include <types/protocol.h>
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/* List head of all registered protocols */
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static struct list protocols = LIST_HEAD_INIT(protocols);
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/* Registers the protocol <proto> */
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void protocol_register(struct protocol *proto)
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{
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LIST_ADDQ(&protocols, &proto->list);
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}
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/* Unregisters the protocol <proto>. Note that all listeners must have
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* previously been unbound.
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*/
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void protocol_unregister(struct protocol *proto)
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{
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LIST_DEL(&proto->list);
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LIST_INIT(&proto->list);
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}
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/* binds all listeners of all registered protocols. Returns a composition
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* of ERR_NONE, ERR_RETRYABLE, ERR_FATAL.
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*/
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int protocol_bind_all(char *errmsg, int errlen)
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{
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struct protocol *proto;
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int err;
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err = 0;
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list_for_each_entry(proto, &protocols, list) {
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if (proto->bind_all) {
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err |= proto->bind_all(proto, errmsg, errlen);
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if ( err & ERR_ABORT )
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break;
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}
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}
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return err;
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}
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/* unbinds all listeners of all registered protocols. They are also closed.
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* This must be performed before calling exit() in order to get a chance to
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* remove file-system based sockets and pipes.
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* Returns a composition of ERR_NONE, ERR_RETRYABLE, ERR_FATAL, ERR_ABORT.
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*/
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int protocol_unbind_all(void)
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{
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struct protocol *proto;
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int err;
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err = 0;
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list_for_each_entry(proto, &protocols, list) {
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if (proto->unbind_all) {
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err |= proto->unbind_all(proto);
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}
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}
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return err;
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}
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/* enables all listeners of all registered protocols. This is intended to be
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* used after a fork() to enable reading on all file descriptors. Returns a
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* composition of ERR_NONE, ERR_RETRYABLE, ERR_FATAL.
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*/
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int protocol_enable_all(void)
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{
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struct protocol *proto;
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int err;
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err = 0;
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list_for_each_entry(proto, &protocols, list) {
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if (proto->enable_all) {
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err |= proto->enable_all(proto);
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}
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}
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return err;
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}
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/* disables all listeners of all registered protocols. This may be used before
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* a fork() to avoid duplicating poll lists. Returns a composition of ERR_NONE,
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* ERR_RETRYABLE, ERR_FATAL.
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*/
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int protocol_disable_all(void)
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{
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struct protocol *proto;
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int err;
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err = 0;
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list_for_each_entry(proto, &protocols, list) {
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if (proto->disable_all) {
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err |= proto->disable_all(proto);
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}
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}
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return err;
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}
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/* Returns the protocol handler for socket family <family> or NULL if not found */
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struct protocol *protocol_by_family(int family)
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{
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struct protocol *proto;
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list_for_each_entry(proto, &protocols, list) {
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if (proto->sock_domain == family)
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return proto;
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}
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return NULL;
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}
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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