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d2fb99f9d5
For now we're still using the protocol's default accept() function as the I/O callback registered by the receiver into the poller. While this is usable for most TCP connections where a listener is needed, this is not suitable for UDP where a different handler is needed. Let's make this configurable in the receiver just like the upper layer is configurable for listeners. In order to ease stream protocols handling, the protocols will now provide a default I/O callback which will be preset into the receivers upon allocation so that almost none of them has to deal with it.
77 lines
3.2 KiB
C
77 lines
3.2 KiB
C
/*
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* include/haproxy/receiver-t.h
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* This file defines the structures needed to manage receivers.
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*
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* Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_RECEIVER_T_H
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#define _HAPROXY_RECEIVER_T_H
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <haproxy/api-t.h>
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#include <haproxy/namespace-t.h>
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#include <haproxy/thread.h>
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/* Bit values for receiver->flags */
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#define RX_F_BOUND 0x00000001 /* receiver already bound */
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#define RX_F_INHERITED 0x00000002 /* inherited FD from the parent process (fd@) */
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#define RX_F_MWORKER 0x00000004 /* keep the FD open in the master but close it in the children */
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/* Bit values for rx_settings->options */
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#define RX_O_FOREIGN 0x00000001 /* receives on foreign addresses */
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#define RX_O_V4V6 0x00000002 /* binds to both IPv4 and IPv6 addresses if !V6ONLY */
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#define RX_O_V6ONLY 0x00000004 /* binds to IPv6 addresses only */
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/* All the settings that are used to configure a receiver */
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struct rx_settings {
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unsigned long bind_proc; /* bitmask of processes allowed to use these listeners */
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unsigned long bind_thread; /* bitmask of threads allowed to use these listeners */
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struct { /* UNIX socket permissions */
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uid_t uid; /* -1 to leave unchanged */
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gid_t gid; /* -1 to leave unchanged */
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mode_t mode; /* 0 to leave unchanged */
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} ux;
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char *interface; /* interface name or NULL */
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const struct netns_entry *netns; /* network namespace of the listener*/
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unsigned int options; /* receiver options (RX_O_*) */
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};
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/* This describes a receiver with all its characteristics (address, options, etc) */
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struct receiver {
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int fd; /* handle we receive from (fd only for now) */
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unsigned int flags; /* receiver options (RX_F_*) */
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struct protocol *proto; /* protocol this receiver belongs to */
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void *owner; /* receiver's owner (usually a listener) */
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void (*iocb)(int fd); /* generic I/O handler (typically accept callback) */
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struct rx_settings *settings; /* points to the settings used by this receiver */
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struct list proto_list; /* list in the protocol header */
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/* warning: this struct is huge, keep it at the bottom */
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struct sockaddr_storage addr; /* the address the socket is bound to */
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};
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#endif /* _HAPROXY_RECEIVER_T_H */
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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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