source: lib/ssl_client.h @ 74349eb

Last change on this file since 74349eb was 8a2221a7, checked in by Wilmer van der Gaast <wilmer@…>, at 2008-03-23T14:29:19Z

Fixed stalling issue with OpenSSL and Jabber (#368).

  • Property mode set to 100644
File size: 3.6 KB
Line 
1  /********************************************************************\
2  * BitlBee -- An IRC to other IM-networks gateway                     *
3  *                                                                    *
4  * Copyright 2002-2004 Wilmer van der Gaast and others                *
5  \********************************************************************/
6
7/* SSL module                                                           */
8
9/*
10  This program is free software; you can redistribute it and/or modify
11  it under the terms of the GNU General Public License as published by
12  the Free Software Foundation; either version 2 of the License, or
13  (at your option) any later version.
14
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  GNU General Public License for more details.
19
20  You should have received a copy of the GNU General Public License with
21  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
22  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
23  Suite 330, Boston, MA  02111-1307  USA
24*/
25
26/* ssl_client makes it easier to open SSL connections to servers. (It
27   doesn't offer SSL server functionality yet, but it could be useful
28   to add it later.) Different ssl_client modules are available, and
29   ssl_client tries to make them all behave the same. It's very simple
30   and basic, it just imitates the proxy_connect() function from the
31   Gaim libs and passes the socket to the program once the handshake
32   is completed. */
33
34#include <glib.h>
35#include "proxy.h"
36
37/* Some generic error codes. Especially SSL_AGAIN is important if you
38   want to do asynchronous I/O. */
39#define SSL_OK            0
40#define SSL_NOHANDSHAKE   1
41#define SSL_AGAIN         2
42
43extern int ssl_errno;
44
45/* This is what your callback function should look like. */
46typedef gboolean (*ssl_input_function)(gpointer, void*, b_input_condition);
47
48
49/* Connect to host:port, call the given function when the connection is
50   ready to be used for SSL traffic. This is all done asynchronously, no
51   blocking I/O! (Except for the DNS lookups, for now...) */
52G_MODULE_EXPORT void *ssl_connect( char *host, int port, ssl_input_function func, gpointer data );
53
54/* Start an SSL session on an existing fd. Useful for STARTTLS functionality,
55   for example in Jabber. */
56G_MODULE_EXPORT void *ssl_starttls( int fd, ssl_input_function func, gpointer data );
57
58/* Obviously you need special read/write functions to read data. */
59G_MODULE_EXPORT int ssl_read( void *conn, char *buf, int len );
60G_MODULE_EXPORT int ssl_write( void *conn, const char *buf, int len );
61
62/* See ssl_openssl.c for an explanation. */
63G_MODULE_EXPORT int ssl_pending( void *conn );
64
65/* Abort the SSL connection and disconnect the socket. Do not use close()
66   directly, both the SSL library and the peer will be unhappy! */
67G_MODULE_EXPORT void ssl_disconnect( void *conn_ );
68
69/* Get the fd for this connection, you will usually need it for event
70   handling. */
71G_MODULE_EXPORT int ssl_getfd( void *conn );
72
73/* This function returns GAIM_INPUT_READ/WRITE. With SSL connections it's
74   possible that something has to be read while actually were trying to
75   write something (think about key exchange/refresh/etc). So when an
76   SSL operation returned SSL_AGAIN, *always* use this function when
77   adding an event handler to the queue. (And it should perform exactly
78   the same action as the handler that just received the SSL_AGAIN.) */
79G_MODULE_EXPORT b_input_condition ssl_getdirection( void *conn );
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