source: roaraudio/libroar/enumdev.c @ 4780:814516280a3b

Last change on this file since 4780:814516280a3b was 4780:814516280a3b, checked in by phi, 13 years ago

avoid some warnings on win32

File size: 8.7 KB
Line 
1//enumdev.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2011
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#include "libroar.h"
37
38// TODO: we should put all the data in one big alloced block.
39
40static int _test_server(struct roar_server * c, int flags) {
41 struct roar_connection con;
42 struct roar_server_info * info;
43 int checked = 0;
44
45 if ( c->server == NULL )
46  return -1;
47
48 if ( flags & ROAR_ENUM_FLAG_NONBLOCK )
49  return 0;
50
51 ROAR_DBG("_test_server(c=%p{.server='%s', ...}, flags=0x%.4X) = ?", c, c->server, flags);
52
53 if ( roar_connect(&con, (char*)c->server) == -1 )
54  return -1;
55
56 if ( (flags & ROAR_ENUM_FLAG_DESC) || (flags & ROAR_ENUM_FLAG_LOCATION) ) {
57  info = roar_server_info(&con);
58  if ( info != NULL ) {
59   checked = 1;
60   if ( info->location != NULL )
61    c->location = roar_mm_strdup(info->location);
62
63   if ( info->description != NULL )
64    c->description = roar_mm_strdup(info->description);
65
66   roar_server_info_free(info);
67  }
68 }
69
70 // make sure we get at least a NOOP from the server to detect protocol mismatch.
71 if ( !checked ) {
72  if ( roar_noop(&con) != 0 ) {
73   roar_disconnect(&con);
74   return -1;
75  }
76 }
77
78 roar_disconnect(&con);
79
80 return 0;
81}
82
83#define _add(x) if ( (x) != NULL ) servers[ret++] = roar_mm_strdup((x))
84static ssize_t _esl_defaults(int flags, int dir, int socktype, char ** servers, size_t maxlen) {
85#ifdef ROAR_HAVE_LIBX11
86 struct roar_x11_connection * x11con;
87#endif
88 ssize_t ret = 0;
89 const char * new;
90 char buf[1024];
91#if !defined(ROAR_TARGET_WIN32) && !defined(ROAR_TARGET_MICROCONTROLLER)
92 int i;
93#endif
94
95 if ( maxlen < 10 )
96  return -1;
97
98 new = roar_libroar_get_server();
99 _add(new);
100
101 new = getenv("ROAR_SERVER");
102 _add(new);
103
104#ifdef ROAR_HAVE_LIBX11
105 if ( (x11con = roar_x11_connect(NULL)) != NULL ) {
106  new = roar_x11_get_prop(x11con, "ROAR_SERVER");
107  _add(new);
108  roar_x11_disconnect(x11con);
109 }
110#endif
111
112#if !defined(ROAR_TARGET_WIN32) && !defined(ROAR_TARGET_MICROCONTROLLER)
113 if ( (i = readlink("/etc/roarserver", buf, sizeof(buf)-1)) != -1 ) {
114   buf[i] = 0;
115   _add(buf);
116 }
117#endif
118
119 if ( (new = roar_env_get_home(0)) != NULL ) {
120  snprintf(buf, sizeof(buf)-1, "%s/%s", new, ROAR_DEFAULT_SOCK_USER);
121  buf[sizeof(buf)-1] = 0;
122  _add(buf);
123 }
124
125 servers[ret++] = roar_mm_strdup(ROAR_DEFAULT_SOCK_GLOBAL);
126 servers[ret++] = roar_mm_strdup(ROAR_DEFAULT_HOST);
127 servers[ret++] = roar_mm_strdup("::" ROAR_DEFAULT_OBJECT);
128 servers[ret++] = roar_mm_strdup("+abstract");
129 servers[ret++] = roar_mm_strdup("/tmp/muroard");
130
131 return ret;
132}
133
134static ssize_t _esl_slp(int flags, int dir, int socktype, char ** servers, size_t maxlen) {
135 struct roar_libroar_config * config = roar_libroar_get_config();
136 struct roar_slp_cookie cookie;
137 int offset;
138 char * url;
139 size_t i;
140 ssize_t ret = 0;
141
142 if ( config->workaround.workarounds & ROAR_LIBROAR_CONFIG_WAS_NO_SLP )
143  return 0;
144
145 if ( roar_slp_cookie_init(&cookie, NULL) == -1 )
146  return -1;
147
148 if ( roar_slp_search(&cookie, ROAR_SLP_URL_TYPE) == -1 )
149  return -1;
150
151 if ( cookie.matchcount == 0 )
152  return -1;
153
154 ROAR_DBG("_esl_slp(*): cookie.matchcount=%i", (int)cookie.matchcount);
155
156 for (i = 0; i < (size_t)cookie.matchcount && (ssize_t)maxlen > ret; i++) {
157  url = cookie.match[i].url;
158  ROAR_DBG("_esl_slp(*): cookie.match[%i].url='%s'", (int)i, url);
159
160  offset = 0;
161
162  if ( !strncmp(url, ROAR_SLP_URL_TYPE "://", ROAR_SLP_URL_TYPE_LEN + 3) )
163   offset = ROAR_SLP_URL_TYPE_LEN + 3;
164
165  ROAR_DBG("_esl_slp(*): url=%p, offset=%i", url, offset);
166  url = &(url[offset]);
167  ROAR_DBG("_esl_slp(*): url='%s'", url);
168
169  if ( *url == 0 )
170   continue;
171
172  _add(url);
173 }
174
175 return ret;
176}
177
178static ssize_t _esl_neighbours(int flags, int dir, int socktype, char ** servers, size_t maxlen) {
179 ssize_t ret = 0;
180 char buf[1024];
181 FILE * inp;
182 size_t i;
183 char * delm;
184 const struct {
185  const char * file;
186  const char * suffix;
187  const size_t skip;
188 } *f, files[] = {
189#ifdef ROAR_PROC_NET_DECNET_NEIGH
190  {ROAR_PROC_NET_DECNET_NEIGH, "::", 1},
191#endif
192#ifdef ROAR_PROC_NET_ARP
193  {ROAR_PROC_NET_ARP, NULL, 1},
194#endif
195//  {"/etc/hosts", NULL, 0},
196  {NULL, NULL, 0}
197 };
198
199 for (f = &(files[0]); f->file != NULL; f++) {
200  if ( (inp = fopen(f->file, "r")) == NULL )
201   continue;
202
203  for (i = 0; i < f->skip; i++) {
204   if ( fgets(buf, sizeof(buf), inp) == NULL ) {
205    // bad error...
206    fclose(inp);
207    return ret;
208   }
209  }
210
211  while (ret < (ssize_t)maxlen && fgets(buf, sizeof(buf), inp) != NULL) {
212   // skip comments and empty lions
213   if ( buf[0] == '#' || buf[0] == '\0' )
214    continue;
215
216   // ensure we have a tailing \0.
217   buf[sizeof(buf)-1] = 0;
218
219   delm = strstr(buf, " ");
220   if ( delm == NULL )
221    delm = strstr(buf, "\t");
222
223   // does it look like a correctly formated lion?
224   // we may remove this check or relax it later.
225   if ( delm == NULL )
226    continue;
227
228   *delm = 0;
229
230   if ( f->suffix != NULL ) {
231    if ( (strlen(buf) + strlen(f->suffix) + 1) > sizeof(buf) )
232     continue;
233
234    strcat(buf, f->suffix);
235   }
236
237   // work around a bug in Linux kernel which always reports node 0.2 to be up.
238   if ( !strcmp(buf, "0.2::") )
239    continue;
240
241   _add(buf);
242  }
243
244  fclose(inp);
245  if ( ret == (ssize_t)maxlen )
246   break;
247 }
248
249 return ret;
250}
251
252struct locmed {
253 int supflags;
254 ssize_t (*func)(int flags, int dir, int socktype, char ** servers, size_t maxlen);
255};
256
257static struct locmed _libroar_locmod[] = {
258 {ROAR_ENUM_FLAG_NONBLOCK|ROAR_ENUM_FLAG_HARDNONBLOCK, _esl_defaults},
259 {ROAR_ENUM_FLAG_NONE,                                 _esl_slp},
260 {ROAR_ENUM_FLAG_NONBLOCK,                             _esl_neighbours}
261};
262
263struct roar_server * roar_enum_servers(int flags, int dir, int socktype) {
264 struct roar_server * ret = NULL;
265 struct roar_server * c;
266 char * servers[64];
267 size_t have = 1;
268 size_t i, cp, unic;
269 ssize_t r;
270 int testflags = flags;
271 int is_uniq;
272
273 // load config:
274 roar_libroar_get_config();
275
276 if ( flags & ROAR_ENUM_FLAG_HARDNONBLOCK )
277  flags |= ROAR_ENUM_FLAG_NONBLOCK;
278
279 if ( testflags & ROAR_ENUM_FLAG_DESC )
280  testflags -= ROAR_ENUM_FLAG_DESC;
281 if ( testflags & ROAR_ENUM_FLAG_LOCATION )
282  testflags -= ROAR_ENUM_FLAG_LOCATION;
283
284 for (i = 0; i < sizeof(_libroar_locmod)/sizeof(*_libroar_locmod); i++) {
285  if ( (_libroar_locmod[i].supflags & testflags) == testflags ) {
286   r = _libroar_locmod[i].func(flags, dir, socktype, &(servers[have-1]), (sizeof(servers)/sizeof(*servers)) - have);
287   if ( r > 0 )
288    have += r;
289  }
290 }
291
292 ret = roar_mm_malloc(have*sizeof(struct roar_server));
293
294 if (ret == NULL)
295  return NULL;
296
297 have--;
298
299 for (i = cp = 0; i < have; i++) {
300  c = &(ret[cp]);
301  c->server = servers[i];
302  c->description = NULL;
303  c->location = NULL;
304
305  // uniq test:
306  is_uniq = 1;
307  for (unic = 0; unic < cp; unic++)
308   if ( !strcmp(ret[unic].server, servers[i]) )
309    is_uniq = 0;
310
311  if ( is_uniq && _test_server(c, flags) == 0 ) {
312   cp++;
313  } else {
314   roar_mm_free(servers[i]);
315  }
316 }
317
318 ret[cp].server = NULL;
319 ret[cp].description = roar_mm_strdup("Default server");
320 ret[cp].location = NULL;
321
322 return ret;
323}
324
325int roar_enum_servers_free(struct roar_server * servs) {
326 struct roar_server * c;
327 int i;
328
329 if ( servs == NULL )
330  return -1;
331
332 for (i = 0; (c = &(servs[i]))->server != NULL; i++) {
333  roar_mm_free((void*)c->server);
334  if ( c->description != NULL )
335   roar_mm_free((void*)c->description);
336  if ( c->location != NULL )
337   roar_mm_free((void*)c->location);
338 }
339
340 if ( c->description != NULL )
341  roar_mm_free((void*)c->description);
342 if ( c->location != NULL )
343  roar_mm_free((void*)c->location);
344
345 roar_mm_free(servs);
346
347 return 0;
348}
349
350ssize_t roar_enum_servers_num(struct roar_server * servs) {
351 size_t ret;
352
353 if ( servs == NULL )
354  return -1;
355
356 for (ret = 0; servs[ret].server != NULL; ret++);
357
358 return ret;
359}
360
361//ll
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