2006-06-26 00:48:02 +00:00
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/*
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2012-08-20 15:01:35 +00:00
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* include/proto/raw_sock.h
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2012-05-11 12:23:52 +00:00
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* This file contains definition for raw stream socket operations
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2010-05-28 16:46:57 +00:00
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*
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2012-05-11 14:59:14 +00:00
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* Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
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2010-05-28 16:46:57 +00:00
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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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2006-06-26 00:48:02 +00:00
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2012-08-20 15:01:35 +00:00
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#ifndef _PROTO_RAW_SOCK_H
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#define _PROTO_RAW_SOCK_H
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2006-06-26 00:48:02 +00:00
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[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
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#include <types/stream_interface.h>
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2006-06-26 00:48:02 +00:00
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REORG: connection: rename the data layer the "transport layer"
While working on the changes required to make the health checks use the
new connections, it started to become obvious that some naming was not
logical at all in the connections. Specifically, it is not logical to
call the "data layer" the layer which is in charge for all the handshake
and which does not yet provide a data layer once established until a
session has allocated all the required buffers.
In fact, it's more a transport layer, which makes much more sense. The
transport layer offers a medium on which data can transit, and it offers
the functions to move these data when the upper layer requests this. And
it is the upper layer which iterates over the transport layer's functions
to move data which should be called the data layer.
The use case where it's obvious is with embryonic sessions : an incoming
SSL connection is accepted. Only the connection is allocated, not the
buffers nor stream interface, etc... The connection handles the SSL
handshake by itself. Once this handshake is complete, we can't use the
data functions because the buffers and stream interface are not there
yet. Hence we have to first call a specific function to complete the
session initialization, after which we'll be able to use the data
functions. This clearly proves that SSL here is only a transport layer
and that the stream interface constitutes the data layer.
A similar change will be performed to rename app_cb => data, but the
two could not be in the same commit for obvious reasons.
2012-10-02 22:19:48 +00:00
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extern struct xprt_ops raw_sock;
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2006-06-26 00:48:02 +00:00
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2012-08-20 15:01:35 +00:00
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#endif /* _PROTO_RAW_SOCK_H */
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2006-06-26 00:48:02 +00:00
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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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