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source: protocols/msn/msn_util.c @ 1d39159

Last change on this file since 1d39159 was 75ec2c8, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-03-10T23:58:47Z
Fixed an "off-by -1" bug in msn_findheader() that could probably be triggered by incoming messages without headers.
Property mode set to `100644`
File size: 9.0 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	/* MSN module - Miscellaneous utilities */
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	#include "nogaim.h"
27	#include "msn.h"
28	#include <ctype.h>
29
30	int msn_write( struct im_connection ic, char s, int len )
31	{
32	struct msn_data *md = ic->proto_data;
33	int st;
34
35	st = write( md->fd, s, len );
36	if( st != len )
37	{
38	imcb_error( ic, "Short write() to main server" );
39	imc_logout( ic, TRUE );
40	return( 0 );
41	}
42
43	return( 1 );
44	}
45
46	int msn_logged_in( struct im_connection *ic )
47	{
48	imcb_connected( ic );
49
50	return( 0 );
51	}
52
53	int msn_buddy_list_add( struct im_connection ic, char list, char who, char realname_ )
54	{
55	struct msn_data *md = ic->proto_data;
56	char buf[1024], *realname;
57
58	realname = msn_http_encode( realname_ );
59
60	g_snprintf( buf, sizeof( buf ), "ADD %d %s %s %s\r\n", ++md->trId, list, who, realname );
61	if( msn_write( ic, buf, strlen( buf ) ) )
62	{
63	g_free( realname );
64
65	return( 1 );
66	}
67
68	g_free( realname );
69
70	return( 0 );
71	}
72
73	int msn_buddy_list_remove( struct im_connection ic, char list, char *who )
74	{
75	struct msn_data *md = ic->proto_data;
76	char buf[1024];
77
78	g_snprintf( buf, sizeof( buf ), "REM %d %s %s\r\n", ++md->trId, list, who );
79	if( msn_write( ic, buf, strlen( buf ) ) )
80	return( 1 );
81
82	return( 0 );
83	}
84
85	struct msn_buddy_ask_data
86	{
87	struct im_connection *ic;
88	char *handle;
89	char *realname;
90	};
91
92	static void msn_buddy_ask_yes( void *data )
93	{
94	struct msn_buddy_ask_data *bla = data;
95
96	msn_buddy_list_add( bla->ic, "AL", bla->handle, bla->realname );
97
98	if( imcb_find_buddy( bla->ic, bla->handle ) == NULL )
99	imcb_ask_add( bla->ic, bla->handle, NULL );
100
101	g_free( bla->handle );
102	g_free( bla->realname );
103	g_free( bla );
104	}
105
106	static void msn_buddy_ask_no( void *data )
107	{
108	struct msn_buddy_ask_data *bla = data;
109
110	msn_buddy_list_add( bla->ic, "BL", bla->handle, bla->realname );
111
112	g_free( bla->handle );
113	g_free( bla->realname );
114	g_free( bla );
115	}
116
117	void msn_buddy_ask( struct im_connection ic, char handle, char *realname )
118	{
119	struct msn_buddy_ask_data *bla = g_new0( struct msn_buddy_ask_data, 1 );
120	char buf[1024];
121
122	bla->ic = ic;
123	bla->handle = g_strdup( handle );
124	bla->realname = g_strdup( realname );
125
126	g_snprintf( buf, sizeof( buf ),
127	"The user %s (%s) wants to add you to his/her buddy list.",
128	handle, realname );
129	imcb_ask( ic, buf, bla, msn_buddy_ask_yes, msn_buddy_ask_no );
130	}
131
132	char msn_findheader( char text, char *header, int len )
133	{
134	int hlen = strlen( header ), i;
135	char *ret;
136
137	if( len == 0 )
138	len = strlen( text );
139
140	i = 0;
141	while( ( i + hlen ) < len )
142	{
143	/* Maybe this is a bit over-commented, but I just hate this part... */
144	if( g_strncasecmp( text + i, header, hlen ) == 0 )
145	{
146	/* Skip to the (probable) end of the header */
147	i += hlen;
148
149	/* Find the first non-[: \t] character */
150	while( i < len && ( text[i] == ':' \|\| text[i] == ' ' \|\| text[i] == '\t' ) ) i ++;
151
152	/* Make sure we're still inside the string */
153	if( i >= len ) return( NULL );
154
155	/* Save the position */
156	ret = text + i;
157
158	/* Search for the end of this line */
159	while( i < len && text[i] != '\r' && text[i] != '\n' ) i ++;
160
161	/* Make sure we're still inside the string */
162	if( i >= len ) return( NULL );
163
164	/* Copy the found data */
165	return( g_strndup( ret, text + i - ret ) );
166	}
167
168	/* This wasn't the header we were looking for, skip to the next line. */
169	while( i < len && ( text[i] != '\r' && text[i] != '\n' ) ) i ++;
170	while( i < len && ( text[i] == '\r' \|\| text[i] == '\n' ) ) i ++;
171
172	/* End of headers? */
173	if( ( i >= 4 && strncmp( text + i - 4, "\r\n\r\n", 4 ) == 0 ) \|\|
174	( i >= 2 && ( strncmp( text + i - 2, "\n\n", 2 ) == 0 \|\|
175	strncmp( text + i - 2, "\r\r", 2 ) == 0 ) ) )
176	{
177	break;
178	}
179	}
180
181	return( NULL );
182	}
183
184	/* NOT thread-safe, but that's not a problem for now... */
185	char *msn_linesplit( char line )
186	{
187	static char **ret = NULL;
188	static int size = 3;
189	int i, n = 0;
190
191	if( ret == NULL )
192	ret = g_new0( char*, size );
193
194	for( i = 0; line[i] && line[i] == ' '; i ++ );
195	if( line[i] )
196	{
197	ret[n++] = line + i;
198	for( i ++; line[i]; i ++ )
199	{
200	if( line[i] == ' ' )
201	line[i] = 0;
202	else if( line[i] != ' ' && !line[i-1] )
203	ret[n++] = line + i;
204
205	if( n >= size )
206	ret = g_renew( char*, ret, size += 2 );
207	}
208	}
209	ret[n] = NULL;
210
211	return( ret );
212	}
213
214	/* This one handles input from a MSN Messenger server. Both the NS and SB servers usually give
215	commands, but sometimes they give additional data (payload). This function tries to handle
216	this all in a nice way and send all data to the right places. */
217
218	/* Return values: -1: Read error, abort connection.
219	0: Command reported error; Abort immediately. (The connection does not exist anymore)
220	1: OK */
221
222	int msn_handler( struct msn_handler_data *h )
223	{
224	int st;
225
226	h->rxq = g_renew( char, h->rxq, h->rxlen + 1024 );
227	st = read( h->fd, h->rxq + h->rxlen, 1024 );
228	h->rxlen += st;
229
230	if( st <= 0 )
231	return( -1 );
232
233	while( st )
234	{
235	int i;
236
237	if( h->msglen == 0 )
238	{
239	for( i = 0; i < h->rxlen; i ++ )
240	{
241	if( h->rxq[i] == '\r' \|\| h->rxq[i] == '\n' )
242	{
243	char cmd_text, *cmd;
244	int count;
245
246	cmd_text = g_strndup( h->rxq, i );
247	cmd = msn_linesplit( cmd_text );
248	for( count = 0; cmd[count]; count ++ );
249	st = h->exec_command( h->data, cmd, count );
250	g_free( cmd_text );
251
252	/* If the connection broke, don't continue. We don't even exist anymore. */
253	if( !st )
254	return( 0 );
255
256	if( h->msglen )
257	h->cmd_text = g_strndup( h->rxq, i );
258
259	/* Skip to the next non-emptyline */
260	while( i < h->rxlen && ( h->rxq[i] == '\r' \|\| h->rxq[i] == '\n' ) ) i ++;
261
262	break;
263	}
264	}
265
266	/* If we reached the end of the buffer, there's still an incomplete command there.
267	Return and wait for more data. */
268	if( i == h->rxlen && h->rxq[i-1] != '\r' && h->rxq[i-1] != '\n' )
269	break;
270	}
271	else
272	{
273	char msg, *cmd;
274	int count;
275
276	/* Do we have the complete message already? */
277	if( h->msglen > h->rxlen )
278	break;
279
280	msg = g_strndup( h->rxq, h->msglen );
281	cmd = msn_linesplit( h->cmd_text );
282	for( count = 0; cmd[count]; count ++ );
283
284	st = h->exec_message( h->data, msg, h->msglen, cmd, count );
285	g_free( msg );
286	g_free( h->cmd_text );
287	h->cmd_text = NULL;
288
289	if( !st )
290	return( 0 );
291
292	i = h->msglen;
293	h->msglen = 0;
294	}
295
296	/* More data after this block? */
297	if( i < h->rxlen )
298	{
299	char *tmp;
300
301	tmp = g_memdup( h->rxq + i, h->rxlen - i );
302	g_free( h->rxq );
303	h->rxq = tmp;
304	h->rxlen -= i;
305	i = 0;
306	}
307	else
308	/* If not, reset the rx queue and get lost. */
309	{
310	g_free( h->rxq );
311	h->rxq = g_new0( char, 1 );
312	h->rxlen = 0;
313	return( 1 );
314	}
315	}
316
317	return( 1 );
318	}
319
320	/* The difference between this function and the normal http_encode() function
321	is that this one escapes every 7-bit ASCII character because this is said
322	to avoid some lame server-side checks when setting a real-name. Also,
323	non-ASCII characters are not escaped because MSN servers don't seem to
324	appreciate that! */
325	char msn_http_encode( const char input )
326	{
327	char ret, s;
328	int i;
329
330	ret = s = g_new0( char, strlen( input ) * 3 + 1 );
331	for( i = 0; input[i]; i ++ )
332	if( input[i] & 128 )
333	{
334	*s = input[i];
335	s ++;
336	}
337	else
338	{
339	g_snprintf( s, 4, "%%%02X", input[i] );
340	s += 3;
341	}
342
343	return ret;
344	}
345
346	void msn_msgq_purge( struct im_connection ic, GSList *list )
347	{
348	struct msn_message *m;
349	GString *ret;
350	GSList *l;
351
352	l = *list;
353	if( l == NULL )
354	return;
355
356	m = l->data;
357	ret = g_string_sized_new( 1024 );
358	g_string_printf( ret, "Warning: Cleaning up MSN (switchboard) connection with unsent "
359	"messages to %s:", m->who ? m->who : "unknown recipient" );
360
361	while( l )
362	{
363	m = l->data;
364
365	g_string_append_printf( ret, "\n%s", m->text );
366
367	g_free( m->who );
368	g_free( m->text );
369	g_free( m );
370
371	l = l->next;
372	}
373	g_slist_free( *list );
374	*list = NULL;
375
376	imcb_log( ic, "%s", ret->str );
377	g_string_free( ret, TRUE );
378	}

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