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haproxy/include/proto/stream_sock.h

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[BIGMOVE] exploded the monolithic haproxy.c file into multiple files. The files are now stored under : - include/haproxy for the generic includes - include/types.h for the structures needed within prototypes - include/proto.h for function prototypes and inline functions - src/*.c for the C files Most include files are now covered by LGPL. A last move still needs to be done to put inline functions under GPL and not LGPL. Version has been set to 1.3.0 in the code but some control still needs to be done before releasing.
2006-06-26 00:48:02 +00:00
/*
include/proto/stream_sock.h
This file contains client-side definitions.
[MAJOR] rework of the server FSM srv_state has been removed from HTTP state machines, and states have been split in either TCP states or analyzers. For instance, the TARPIT state has just become a simple analyzer. New flags have been added to the struct buffer to compensate this. The high-level stream processors sometimes need to force a disconnection without touching a file-descriptor (eg: report an error). But if they touched BF_SHUTW or BF_SHUTR, the file descriptor would not be closed. Thus, the two SHUT?_NOW flags have been added so that an application can request a forced close which the stream interface will be forced to obey. During this change, a new BF_HIJACK flag was added. It will be used for data generation, eg during a stats dump. It prevents the producer on a buffer from sending data into it. BF_SHUTR_NOW /* the producer must shut down for reads ASAP */ BF_SHUTW_NOW /* the consumer must shut down for writes ASAP */ BF_HIJACK /* the producer is temporarily replaced */ BF_SHUTW_NOW has precedence over BF_HIJACK. BF_HIJACK has precedence over BF_MAY_FORWARD (so that it does not need it). New functions buffer_shutr_now(), buffer_shutw_now(), buffer_abort() are provided to manipulate BF_SHUT* flags. A new type "stream_interface" has been added to describe both sides of a buffer. A stream interface has states and error reporting. The session now has two stream interfaces (one per side). Each buffer has stream_interface pointers to both consumer and producer sides. The server-side file descriptor has moved to its stream interface, so that even the buffer has access to it. process_srv() has been split into three parts : - tcp_get_connection() obtains a connection to the server - tcp_connection_failed() tests if a previously attempted connection has succeeded or not. - process_srv_data() only manages the data phase, and in this sense should be roughly equivalent to process_cli. Little code has been removed, and a lot of old code has been left in comments for now.
2008-10-19 05:30:41 +00:00
Copyright (C) 2000-2008 Willy Tarreau - w@1wt.eu
[MEDIUM] enable inter-stream_interface wakeup calls By letting the producer tell the consumer there is data to check, and the consumer tell the producer there is some space left again, we can cut in half the number of session wakeups. This is also an important starting point for future splicing support.
2008-12-14 13:42:35 +00:00
[BIGMOVE] exploded the monolithic haproxy.c file into multiple files. The files are now stored under : - include/haproxy for the generic includes - include/types.h for the structures needed within prototypes - include/proto.h for function prototypes and inline functions - src/*.c for the C files Most include files are now covered by LGPL. A last move still needs to be done to put inline functions under GPL and not LGPL. Version has been set to 1.3.0 in the code but some control still needs to be done before releasing.
2006-06-26 00:48:02 +00:00
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation, version 2.1
exclusively.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PROTO_STREAM_SOCK_H
#define _PROTO_STREAM_SOCK_H
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
[CLEANUP] renamed include/haproxy to include/common
2006-06-29 15:53:05 +00:00
#include <common/config.h>
[MAJOR] rework of the server FSM srv_state has been removed from HTTP state machines, and states have been split in either TCP states or analyzers. For instance, the TARPIT state has just become a simple analyzer. New flags have been added to the struct buffer to compensate this. The high-level stream processors sometimes need to force a disconnection without touching a file-descriptor (eg: report an error). But if they touched BF_SHUTW or BF_SHUTR, the file descriptor would not be closed. Thus, the two SHUT?_NOW flags have been added so that an application can request a forced close which the stream interface will be forced to obey. During this change, a new BF_HIJACK flag was added. It will be used for data generation, eg during a stats dump. It prevents the producer on a buffer from sending data into it. BF_SHUTR_NOW /* the producer must shut down for reads ASAP */ BF_SHUTW_NOW /* the consumer must shut down for writes ASAP */ BF_HIJACK /* the producer is temporarily replaced */ BF_SHUTW_NOW has precedence over BF_HIJACK. BF_HIJACK has precedence over BF_MAY_FORWARD (so that it does not need it). New functions buffer_shutr_now(), buffer_shutw_now(), buffer_abort() are provided to manipulate BF_SHUT* flags. A new type "stream_interface" has been added to describe both sides of a buffer. A stream interface has states and error reporting. The session now has two stream interfaces (one per side). Each buffer has stream_interface pointers to both consumer and producer sides. The server-side file descriptor has moved to its stream interface, so that even the buffer has access to it. process_srv() has been split into three parts : - tcp_get_connection() obtains a connection to the server - tcp_connection_failed() tests if a previously attempted connection has succeeded or not. - process_srv_data() only manages the data phase, and in this sense should be roughly equivalent to process_cli. Little code has been removed, and a lot of old code has been left in comments for now.
2008-10-19 05:30:41 +00:00
#include <types/stream_interface.h>
[BIGMOVE] exploded the monolithic haproxy.c file into multiple files. The files are now stored under : - include/haproxy for the generic includes - include/types.h for the structures needed within prototypes - include/proto.h for function prototypes and inline functions - src/*.c for the C files Most include files are now covered by LGPL. A last move still needs to be done to put inline functions under GPL and not LGPL. Version has been set to 1.3.0 in the code but some control still needs to be done before releasing.
2006-06-26 00:48:02 +00:00
[MEDIUM] got rid of event_{cli,srv}_write() in favor of stream_sock_write() The timeouts, expiration timers and results are now stored in the buffers. The timers will have to change a bit to become more flexible, and when the I/O completion functions will be written, the connect_complete() will have to be extracted from the write() function.
2006-07-29 17:01:31 +00:00
/* main event functions used to move data between sockets and buffers */
[MEDIUM] got rid of event_{cli,srv}_read() in favor of stream_sock_read()
2006-07-29 16:36:34 +00:00
int stream_sock_read(int fd);
[MEDIUM] got rid of event_{cli,srv}_write() in favor of stream_sock_write() The timeouts, expiration timers and results are now stored in the buffers. The timers will have to change a bit to become more flexible, and when the I/O completion functions will be written, the connect_complete() will have to be extracted from the write() function.
2006-07-29 17:01:31 +00:00
int stream_sock_write(int fd);
[MINOR] stream_sock_data_finish() should not expose fd stream_sock_data_finish was still using a file descriptor as only argument, while a stream interface is preferred. This is now fixed.
2008-11-30 20:37:12 +00:00
void stream_sock_data_finish(struct stream_interface *si);
[MEDIUM] remove stream_sock_update_data() Two new functions are used instead : buffer_check_{shutr,shutw}. It is indeed more adequate to check for new closures only when the buffer reports them. Several remaining unclosed connections were detected after a test, even before this patch, so a bug remains. To reproduce, try the following during 30 seconds : inject30l4 -n 20000 -l -t 1000 -P 10 -o 4 -u 100 -s 100 -G 127.0.0.1:8000/
2008-11-23 18:31:35 +00:00
void stream_sock_shutr(struct stream_interface *si);
void stream_sock_shutw(struct stream_interface *si);
[MEDIUM] enable inter-stream_interface wakeup calls By letting the producer tell the consumer there is data to check, and the consumer tell the producer there is some space left again, we can cut in half the number of session wakeups. This is also an important starting point for future splicing support.
2008-12-14 13:42:35 +00:00
void stream_sock_chk_rcv(struct stream_interface *si);
void stream_sock_chk_snd(struct stream_interface *si);
[BIGMOVE] exploded the monolithic haproxy.c file into multiple files. The files are now stored under : - include/haproxy for the generic includes - include/types.h for the structures needed within prototypes - include/proto.h for function prototypes and inline functions - src/*.c for the C files Most include files are now covered by LGPL. A last move still needs to be done to put inline functions under GPL and not LGPL. Version has been set to 1.3.0 in the code but some control still needs to be done before releasing.
2006-06-26 00:48:02 +00:00
/* This either returns the sockname or the original destination address. Code
* inspired from Patrick Schaaf's example of nf_getsockname() implementation.
*/
static inline int get_original_dst(int fd, struct sockaddr_in *sa, socklen_t *salen) {
#if defined(TPROXY) && defined(SO_ORIGINAL_DST)
return getsockopt(fd, SOL_IP, SO_ORIGINAL_DST, (void *)sa, salen);
#else
#if defined(TPROXY) && defined(USE_GETSOCKNAME)
return getsockname(fd, (struct sockaddr *)sa, salen);
#else
return -1;
#endif
#endif
}
#endif /* _PROTO_STREAM_SOCK_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/