Add file include/share/compat.h and start moving CPP hackery into it.
[flac.git] / src / plugin_xmms / http.c
1 /*  XMMS - Cross-platform multimedia player
2  *  Copyright (C) 1998-2000  Peter Alm, Mikael Alm, Olle Hallnas, Thomas Nilsson and 4Front Technologies
3  *
4  *  This program is free software; you can redistribute it and/or modify
5  *  it under the terms of the GNU General Public License as published by
6  *  the Free Software Foundation; either version 2 of the License, or
7  *  (at your option) any later version.
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License
15  *  along with this program; if not, write to the Free Software
16  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17  */
18 /* modified for FLAC support by Steven Richman (2003) */
19
20 #if HAVE_CONFIG_H
21 #  include <config.h>
22 #endif
23
24 #include <sys/types.h>
25 #include <sys/socket.h>
26 #include <sys/time.h>
27 #include <netinet/in.h>
28 #include <arpa/inet.h>
29 #include <netdb.h>
30 #include <glib.h>
31 #include <string.h>
32 #include <fcntl.h>
33 #include <unistd.h>
34 #include <errno.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37
38 #include <pthread.h>
39
40 #include <xmms/util.h>
41 #include <xmms/plugin.h>
42
43 #include "FLAC/format.h"
44 #include "configure.h"
45 #include "locale_hack.h"
46 #include "plugin.h"
47
48 /* on FreeBSD we get socklen_t from <sys/socket.h> */
49 #if (!defined HAVE_SOCKLEN_T) && !defined(__FreeBSD__)
50 typedef unsigned int socklen_t;
51 #endif
52
53 #define min(x,y) ((x)<(y)?(x):(y))
54 #define min3(x,y,z) (min(x,y)<(z)?min(x,y):(z))
55 #define min4(x,y,z,w) (min3(x,y,z)<(w)?min3(x,y,z):(w))
56
57 static gchar *icy_name = NULL;
58 static gint icy_metaint = 0;
59
60 extern InputPlugin flac_ip;
61
62 #undef DEBUG_UDP
63
64 /* Static udp channel functions */
65 static int udp_establish_listener (gint *sock);
66 static int udp_check_for_data(gint sock);
67
68 static char *flac_http_get_title(char *url);
69
70 static gboolean prebuffering, going, eof = FALSE;
71 static gint sock, rd_index, wr_index, buffer_length, prebuffer_length;
72 static guint64 buffer_read = 0;
73 static gchar *buffer;
74 static guint64 offset;
75 static pthread_t thread;
76 static GtkWidget *error_dialog = NULL;
77
78 static FILE *output_file = NULL;
79
80 #define BASE64_LENGTH(len) (4 * (((len) + 2) / 3))
81
82 /* Encode the string S of length LENGTH to base64 format and place it
83    to STORE.  STORE will be 0-terminated, and must point to a writable
84    buffer of at least 1+BASE64_LENGTH(length) bytes.  */
85 static void base64_encode (const gchar *s, gchar *store, gint length)
86 {
87         /* Conversion table.  */
88         static gchar tbl[64] = {
89                 'A','B','C','D','E','F','G','H',
90                 'I','J','K','L','M','N','O','P',
91                 'Q','R','S','T','U','V','W','X',
92                 'Y','Z','a','b','c','d','e','f',
93                 'g','h','i','j','k','l','m','n',
94                 'o','p','q','r','s','t','u','v',
95                 'w','x','y','z','0','1','2','3',
96                 '4','5','6','7','8','9','+','/'
97         };
98         gint i;
99         guchar *p = (guchar *)store;
100
101         /* Transform the 3x8 bits to 4x6 bits, as required by base64.  */
102         for (i = 0; i < length; i += 3)
103         {
104                 *p++ = tbl[s[0] >> 2];
105                 *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
106                 *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
107                 *p++ = tbl[s[2] & 0x3f];
108                 s += 3;
109         }
110         /* Pad the result if necessary...  */
111         if (i == length + 1)
112                 *(p - 1) = '=';
113         else if (i == length + 2)
114                 *(p - 1) = *(p - 2) = '=';
115         /* ...and zero-terminate it.  */
116         *p = '\0';
117 }
118
119 /* Create the authentication header contents for the `Basic' scheme.
120    This is done by encoding the string `USER:PASS' in base64 and
121    prepending `HEADER: Basic ' to it.  */
122 static gchar *basic_authentication_encode (const gchar *user, const gchar *passwd, const gchar *header)
123 {
124         gchar *t1, *t2, *res;
125         gint len1 = strlen (user) + 1 + strlen (passwd);
126         gint len2 = BASE64_LENGTH (len1);
127
128         t1 = g_strdup_printf("%s:%s", user, passwd);
129         t2 = g_malloc0(len2 + 1);
130         base64_encode (t1, t2, len1);
131         res = g_strdup_printf("%s: Basic %s\r\n", header, t2);
132         g_free(t2);
133         g_free(t1);
134
135         return res;
136 }
137
138 static void parse_url(const gchar * url, gchar ** user, gchar ** pass, gchar ** host, int *port, gchar ** filename)
139 {
140         gchar *h, *p, *pt, *f, *temp, *ptr;
141
142         temp = g_strdup(url);
143         ptr = temp;
144
145         if (!strncasecmp("http://", ptr, 7))
146                 ptr += 7;
147         h = strchr(ptr, '@');
148         f = strchr(ptr, '/');
149         if (h != NULL && (!f || h < f))
150         {
151                 *h = '\0';
152                 p = strchr(ptr, ':');
153                 if (p != NULL && p < h)
154                 {
155                         *p = '\0';
156                         p++;
157                         *pass = g_strdup(p);
158                 }
159                 else
160                         *pass = NULL;
161                 *user = g_strdup(ptr);
162                 h++;
163                 ptr = h;
164         }
165         else
166         {
167                 *user = NULL;
168                 *pass = NULL;
169                 h = ptr;
170         }
171         pt = strchr(ptr, ':');
172         if (pt != NULL && (f == NULL || pt < f))
173         {
174                 *pt = '\0';
175                 *port = atoi(pt + 1);
176         }
177         else
178         {
179                 if (f)
180                         *f = '\0';
181                 *port = 80;
182         }
183         *host = g_strdup(h);
184
185         if (f)
186                 *filename = g_strdup(f + 1);
187         else
188                 *filename = NULL;
189         g_free(temp);
190 }
191
192 void flac_http_close(void)
193 {
194         going = FALSE;
195
196         pthread_join(thread, NULL);
197         g_free(icy_name);
198         icy_name = NULL;
199 }
200
201
202 static gint http_used(void)
203 {
204         if (wr_index >= rd_index)
205                 return wr_index - rd_index;
206         return buffer_length - (rd_index - wr_index);
207 }
208
209 static gint http_free(void)
210 {
211         if (rd_index > wr_index)
212                 return (rd_index - wr_index) - 1;
213         return (buffer_length - (wr_index - rd_index)) - 1;
214 }
215
216 static void http_wait_for_data(gint bytes)
217 {
218         while ((prebuffering || http_used() < bytes) && !eof && going)
219                 xmms_usleep(10000);
220 }
221
222 static void show_error_message(gchar *error)
223 {
224         if(!error_dialog)
225         {
226                 GDK_THREADS_ENTER();
227                 error_dialog = xmms_show_message(_("Error"), error, _("Ok"), FALSE,
228                                                  NULL, NULL);
229                 gtk_signal_connect(GTK_OBJECT(error_dialog),
230                                    "destroy",
231                                    GTK_SIGNAL_FUNC(gtk_widget_destroyed),
232                                    &error_dialog);
233                 GDK_THREADS_LEAVE();
234         }
235 }
236
237 int flac_http_read(gpointer data, gint length)
238 {
239         gint len, cnt, off = 0, meta_len, meta_off = 0, i;
240         gchar *meta_data, **tags, *temp, *title;
241         if (length > buffer_length) {
242                 length = buffer_length;
243         }
244
245         http_wait_for_data(length);
246
247         if (!going)
248                 return 0;
249         len = min(http_used(), length);
250
251         while (len && http_used())
252         {
253                 if ((flac_cfg.stream.cast_title_streaming) && (icy_metaint > 0) && (buffer_read % icy_metaint) == 0 && (buffer_read > 0))
254                 {
255                         meta_len = *((guchar *) buffer + rd_index) * 16;
256                         rd_index = (rd_index + 1) % buffer_length;
257                         if (meta_len > 0)
258                         {
259                                 http_wait_for_data(meta_len);
260                                 meta_data = g_malloc0(meta_len);
261                                 if (http_used() >= meta_len)
262                                 {
263                                         while (meta_len)
264                                         {
265                                                 cnt = min(meta_len, buffer_length - rd_index);
266                                                 memcpy(meta_data + meta_off, buffer + rd_index, cnt);
267                                                 rd_index = (rd_index + cnt) % buffer_length;
268                                                 meta_len -= cnt;
269                                                 meta_off += cnt;
270                                         }
271                                         tags = g_strsplit(meta_data, "';", 0);
272
273                                         for (i = 0; tags[i]; i++)
274                                         {
275                                                 if (!strncasecmp(tags[i], "StreamTitle=", 12))
276                                                 {
277                                                         temp = g_strdup(tags[i] + 13);
278                                                         title = g_strdup_printf("%s (%s)", temp, icy_name);
279                                                         set_track_info(title, -1);
280                                                         g_free(title);
281                                                         g_free(temp);
282                                                 }
283
284                                         }
285                                         g_strfreev(tags);
286
287                                 }
288                                 g_free(meta_data);
289                         }
290                         if (!http_used())
291                                 http_wait_for_data(length - off);
292                         cnt = min3(len, buffer_length - rd_index, http_used());
293                 }
294                 else if ((icy_metaint > 0) && (flac_cfg.stream.cast_title_streaming))
295                         cnt = min4(len, buffer_length - rd_index, http_used(), icy_metaint - (gint) (buffer_read % icy_metaint));
296                 else
297                         cnt = min3(len, buffer_length - rd_index, http_used());
298                 if (output_file)
299                         fwrite(buffer + rd_index, 1, cnt, output_file);
300
301                 memcpy((gchar *)data + off, buffer + rd_index, cnt);
302                 rd_index = (rd_index + cnt) % buffer_length;
303                 buffer_read += cnt;
304                 len -= cnt;
305                 off += cnt;
306         }
307         if (!off) {
308                 fprintf(stderr, "returning zero\n");
309         }
310         return off;
311 }
312
313 static gboolean http_check_for_data(void)
314 {
315
316         fd_set set;
317         struct timeval tv;
318         gint ret;
319
320         tv.tv_sec = 0;
321         tv.tv_usec = 20000;
322         FD_ZERO(&set);
323         FD_SET(sock, &set);
324         ret = select(sock + 1, &set, NULL, NULL, &tv);
325         if (ret > 0)
326                 return TRUE;
327         return FALSE;
328 }
329
330 gint flac_http_read_line(gchar * buf, gint size)
331 {
332         gint i = 0;
333
334         while (going && i < size - 1)
335         {
336                 if (http_check_for_data())
337                 {
338                         if (read(sock, buf + i, 1) <= 0)
339                                 return -1;
340                         if (buf[i] == '\n')
341                                 break;
342                         if (buf[i] != '\r')
343                                 i++;
344                 }
345         }
346         if (!going)
347                 return -1;
348         buf[i] = '\0';
349         return i;
350 }
351
352 /* returns the file descriptor of the socket, or -1 on error */
353 static int http_connect (gchar *url_, gboolean head, guint64 offset)
354 {
355         gchar line[1024], *user, *pass, *host, *filename,
356              *status, *url, *temp, *file;
357         gchar *chost;
358         gint cnt, error, port, cport;
359         socklen_t err_len;
360         gboolean redirect;
361         int udp_sock = 0;
362         fd_set set;
363         struct hostent *hp;
364         struct sockaddr_in address;
365         struct timeval tv;
366
367         url = g_strdup (url_);
368
369         do
370         {
371                 redirect=FALSE;
372
373                 g_strstrip(url);
374
375                 parse_url(url, &user, &pass, &host, &port, &filename);
376
377                 if ((!filename || !*filename) && url[strlen(url) - 1] != '/')
378                         temp = g_strconcat(url, "/", NULL);
379                 else
380                         temp = g_strdup(url);
381                 g_free(url);
382                 url = temp;
383
384                 chost = flac_cfg.stream.use_proxy ? flac_cfg.stream.proxy_host : host;
385                 cport = flac_cfg.stream.use_proxy ? flac_cfg.stream.proxy_port : port;
386
387                 sock = socket(AF_INET, SOCK_STREAM, 0);
388                 fcntl(sock, F_SETFL, O_NONBLOCK);
389                 address.sin_family = AF_INET;
390
391                 status = g_strdup_printf(_("LOOKING UP %s"), chost);
392                 flac_ip.set_info_text(status);
393                 g_free(status);
394
395                 if (!(hp = gethostbyname(chost)))
396                 {
397                         status = g_strdup_printf(_("Couldn't look up host %s"), chost);
398                         show_error_message(status);
399                         g_free(status);
400
401                         flac_ip.set_info_text(NULL);
402                         eof = TRUE;
403                 }
404
405                 if (!eof)
406                 {
407                         memcpy(&address.sin_addr.s_addr, *(hp->h_addr_list), sizeof (address.sin_addr.s_addr));
408                         address.sin_port = (gint) g_htons(cport);
409
410                         status = g_strdup_printf(_("CONNECTING TO %s:%d"), chost, cport);
411                         flac_ip.set_info_text(status);
412                         g_free(status);
413                         if (connect(sock, (struct sockaddr *) &address, sizeof (struct sockaddr_in)) == -1)
414                         {
415                                 if (errno != EINPROGRESS)
416                                 {
417                                         status = g_strdup_printf(_("Couldn't connect to host %s"), chost);
418                                         show_error_message(status);
419                                         g_free(status);
420
421                                         flac_ip.set_info_text(NULL);
422                                         eof = TRUE;
423                                 }
424                         }
425                         while (going)
426                         {
427                                 tv.tv_sec = 0;
428                                 tv.tv_usec = 10000;
429                                 FD_ZERO(&set);
430                                 FD_SET(sock, &set);
431                                 if (select(sock + 1, NULL, &set, NULL, &tv) > 0)
432                                 {
433                                         err_len = sizeof (error);
434                                         getsockopt(sock, SOL_SOCKET, SO_ERROR, &error, &err_len);
435                                         if (error)
436                                         {
437                                                 status = g_strdup_printf(_("Couldn't connect to host %s"),
438                                                                          chost);
439                                                 show_error_message(status);
440                                                 g_free(status);
441
442                                                 flac_ip.set_info_text(NULL);
443                                                 eof = TRUE;
444
445                                         }
446                                         break;
447                                 }
448                         }
449                         if (!eof)
450                         {
451                                 gchar *auth = NULL, *proxy_auth = NULL;
452                                 gchar udpspace[30];
453                                 int udp_port;
454
455                                 if (flac_cfg.stream.use_udp_channel)
456                                 {
457                                         udp_port = udp_establish_listener (&udp_sock);
458                                         if (udp_port > 0)
459                                                 sprintf (udpspace, "x-audiocast-udpport: %d\r\n", udp_port);
460                                         else
461                                                 udp_sock = 0;
462                                 }
463
464                                 if(user && pass)
465                                         auth = basic_authentication_encode(user, pass, "Authorization");
466
467                                 if (flac_cfg.stream.use_proxy)
468                                 {
469                                         file = g_strdup(url);
470                                         if(flac_cfg.stream.proxy_use_auth && flac_cfg.stream.proxy_user && flac_cfg.stream.proxy_pass)
471                                         {
472                                                 proxy_auth = basic_authentication_encode(flac_cfg.stream.proxy_user,
473                                                                                          flac_cfg.stream.proxy_pass,
474                                                                                          "Proxy-Authorization");
475                                         }
476                                 }
477                                 else
478                                         file = g_strconcat("/", filename, NULL);
479
480                                 temp = g_strdup_printf("GET %s HTTP/1.0\r\n"
481                                                        "Host: %s\r\n"
482                                                        "User-Agent: %s/%s\r\n"
483                                                        "%s%s%s%s",
484                                                        file, host, "Reference FLAC Player", FLAC__VERSION_STRING,
485                                                        proxy_auth ? proxy_auth : "", auth ? auth : "",
486                                                        flac_cfg.stream.cast_title_streaming ?  "Icy-MetaData:1\r\n" : "",
487                                                        flac_cfg.stream.use_udp_channel ? udpspace : "");
488                                 if (offset && !head) {
489                                         gchar *temp_dead = temp;
490                                         temp = g_strdup_printf ("%sRange: %" PRIu64 "-\r\n", temp, offset);
491                                         fprintf (stderr, "%s", temp);
492                                         g_free (temp_dead);
493                                 }
494
495                                 g_free(file);
496                                 if(proxy_auth)
497                                         g_free(proxy_auth);
498                                 if(auth)
499                                         g_free(auth);
500                                 write(sock, temp, strlen(temp));
501                                 write(sock, "\r\n", 2);
502                                 g_free(temp);
503                                 flac_ip.set_info_text(_("CONNECTED: WAITING FOR REPLY"));
504                                 while (going && !eof)
505                                   {
506                                         if (http_check_for_data())
507                                         {
508                                                 if (flac_http_read_line(line, 1024))
509                                                 {
510                                                         status = strchr(line, ' ');
511                                                         if (status)
512                                                         {
513                                                                 if (status[1] == '2')
514                                                                         break;
515                                                                 else if(status[1] == '3' && status[2] == '0' && status[3] == '2')
516                                                                 {
517                                                                         while(going)
518                                                                         {
519                                                                                 if(http_check_for_data())
520                                                                                 {
521                                                                                         if((cnt = flac_http_read_line(line, 1024)) != -1)
522                                                                                         {
523                                                                                                 if(!cnt)
524                                                                                                         break;
525                                                                                                 if(!strncmp(line, "Location:", 9))
526                                                                                                 {
527                                                                                                         g_free(url);
528                                                                                                         url = g_strdup(line+10);
529                                                                                                 }
530                                                                                         }
531                                                                                         else
532                                                                                         {
533                                                                                                 eof=TRUE;
534                                                                                                 flac_ip.set_info_text(NULL);
535                                                                                                 break;
536                                                                                         }
537                                                                                 }
538                                                                         }
539                                                                         redirect=TRUE;
540                                                                         break;
541                                                                 }
542                                                                 else
543                                                                 {
544                                                                         status = g_strdup_printf(_("Couldn't connect to host %s\nServer reported: %s"), chost, status);
545                                                                         show_error_message(status);
546                                                                         g_free(status);
547                                                                         break;
548                                                                 }
549                                                         }
550                                                 }
551                                                 else
552                                                 {
553                                                         eof = TRUE;
554                                                         flac_ip.set_info_text(NULL);
555                                                 }
556                                         }
557                                 }
558
559                                 while (going && !redirect)
560                                 {
561                                         if (http_check_for_data())
562                                         {
563                                                 if ((cnt = flac_http_read_line(line, 1024)) != -1)
564                                                 {
565                                                         if (!cnt)
566                                                                 break;
567                                                         if (!strncmp(line, "icy-name:", 9))
568                                                                 icy_name = g_strdup(line + 9);
569                                                         else if (!strncmp(line, "x-audiocast-name:", 17))
570                                                                 icy_name = g_strdup(line + 17);
571                                                         if (!strncmp(line, "icy-metaint:", 12))
572                                                                 icy_metaint = atoi(line + 12);
573                                                         if (!strncmp(line, "x-audiocast-udpport:", 20)) {
574 #ifdef DEBUG_UDP
575                                                                 fprintf (stderr, "Server wants udp messages on port %d\n", atoi (line + 20));
576 #endif
577                                                                 /*udp_serverport = atoi (line + 20);*/
578                                                         }
579
580                                                 }
581                                                 else
582                                                 {
583                                                         eof = TRUE;
584                                                         flac_ip.set_info_text(NULL);
585                                                         break;
586                                                 }
587                                         }
588                                 }
589                         }
590                 }
591
592                 if(redirect)
593                 {
594                         if (output_file)
595                         {
596                                 fclose(output_file);
597                                 output_file = NULL;
598                         }
599                         close(sock);
600                 }
601
602                 g_free(user);
603                 g_free(pass);
604                 g_free(host);
605                 g_free(filename);
606         } while(redirect);
607
608         g_free(url);
609         return eof ? -1 : sock;
610 }
611
612 static void *http_buffer_loop(void *arg)
613 {
614         gchar *status, *url, *temp, *file;
615         gint cnt, written;
616         int udp_sock = 0;
617
618         url = (gchar *) arg;
619         sock = http_connect (url, false, offset);
620
621         if (sock >= 0 && flac_cfg.stream.save_http_stream) {
622                 gchar *output_name;
623                 file = flac_http_get_title(url);
624                 output_name = file;
625                 if (!strncasecmp(output_name, "http://", 7))
626                         output_name += 7;
627                 temp = strrchr(output_name, '.');
628                 if (temp && (!strcasecmp(temp, ".fla") || !strcasecmp(temp, ".flac")))
629                         *temp = '\0';
630
631                 while ((temp = strchr(output_name, '/')))
632                         *temp = '_';
633                 output_name = g_strdup_printf("%s/%s.flac", flac_cfg.stream.save_http_path, output_name);
634
635                 g_free(file);
636
637                 output_file = fopen(output_name, "wb");
638                 g_free(output_name);
639         }
640
641         while (going)
642         {
643
644                 if (!http_used() && !flac_ip.output->buffer_playing())
645                         prebuffering = TRUE;
646                 if (http_free() > 0 && !eof)
647                 {
648                         if (http_check_for_data())
649                         {
650                                 cnt = min(http_free(), buffer_length - wr_index);
651                                 if (cnt > 1024)
652                                         cnt = 1024;
653                                 written = read(sock, buffer + wr_index, cnt);
654                                 if (written <= 0)
655                                 {
656                                         eof = TRUE;
657                                         if (prebuffering)
658                                         {
659                                                 prebuffering = FALSE;
660
661                                                 flac_ip.set_info_text(NULL);
662                                         }
663
664                                 }
665                                 else
666                                         wr_index = (wr_index + written) % buffer_length;
667                         }
668
669                         if (prebuffering)
670                         {
671                                 if (http_used() > prebuffer_length)
672                                 {
673                                         prebuffering = FALSE;
674                                         flac_ip.set_info_text(NULL);
675                                 }
676                                 else
677                                 {
678                                         status = g_strdup_printf(_("PRE-BUFFERING: %dKB/%dKB"), http_used() / 1024, prebuffer_length / 1024);
679                                         flac_ip.set_info_text(status);
680                                         g_free(status);
681                                 }
682
683                         }
684                 }
685                 else
686                         xmms_usleep(10000);
687
688                 if (flac_cfg.stream.use_udp_channel && udp_sock != 0)
689                         if (udp_check_for_data(udp_sock) < 0)
690                         {
691                                 close(udp_sock);
692                                 udp_sock = 0;
693                         }
694         }
695         if (output_file)
696         {
697                 fclose(output_file);
698                 output_file = NULL;
699         }
700         if (sock >= 0) {
701                 close(sock);
702         }
703         if (udp_sock != 0)
704                 close(udp_sock);
705
706         g_free(buffer);
707         g_free(url);
708
709         pthread_exit(NULL);
710         return NULL; /* avoid compiler warning */
711 }
712
713 int flac_http_open(const gchar * _url, guint64 _offset)
714 {
715         gchar *url;
716
717         url = g_strdup(_url);
718
719         rd_index = 0;
720         wr_index = 0;
721         buffer_length = flac_cfg.stream.http_buffer_size * 1024;
722         prebuffer_length = (buffer_length * flac_cfg.stream.http_prebuffer) / 100;
723         buffer_read = 0;
724         icy_metaint = 0;
725         prebuffering = TRUE;
726         going = TRUE;
727         eof = FALSE;
728         buffer = g_malloc(buffer_length);
729         offset = _offset;
730
731         pthread_create(&thread, NULL, http_buffer_loop, url);
732
733         return 0;
734 }
735
736 char *flac_http_get_title(char *url)
737 {
738         if (icy_name)
739                 return g_strdup(icy_name);
740         if (g_basename(url) && strlen(g_basename(url)) > 0)
741                 return g_strdup(g_basename(url));
742         return g_strdup(url);
743 }
744
745 /* Start UDP Channel specific stuff */
746
747 /* Find a good local udp port and bind udp_sock to it, return the port */
748 static int udp_establish_listener(int *sock)
749 {
750         struct sockaddr_in sin;
751         socklen_t sinlen = sizeof (struct sockaddr_in);
752
753 #ifdef DEBUG_UDP
754         fprintf (stderr,"Establishing udp listener\n");
755 #endif
756
757         if ((*sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
758         {
759                 g_log(NULL, G_LOG_LEVEL_CRITICAL,
760                       "udp_establish_listener(): unable to create socket");
761                 return -1;
762         }
763
764         memset(&sin, 0, sinlen);
765         sin.sin_family = AF_INET;
766         sin.sin_addr.s_addr = g_htonl(INADDR_ANY);
767
768         if (bind(*sock, (struct sockaddr *)&sin, sinlen) < 0)
769         {
770                 g_log(NULL, G_LOG_LEVEL_CRITICAL,
771                       "udp_establish_listener():  Failed to bind socket to localhost: %s", strerror(errno));
772                 close(*sock);
773                 return -1;
774         }
775         if (fcntl(*sock, F_SETFL, O_NONBLOCK) < 0)
776         {
777                 g_log(NULL, G_LOG_LEVEL_CRITICAL,
778                       "udp_establish_listener():  Failed to set flags: %s", strerror(errno));
779                 close(*sock);
780                 return -1;
781         }
782
783         memset(&sin, 0, sinlen);
784         if (getsockname(*sock, (struct sockaddr *)&sin, &sinlen) < 0)
785         {
786                 g_log(NULL, G_LOG_LEVEL_CRITICAL,
787                       "udp_establish_listener():  Failed to retrieve socket info: %s", strerror(errno));
788                 close(*sock);
789                 return -1;
790         }
791
792 #ifdef DEBUG_UDP
793         fprintf (stderr,"Listening on local %s:%d\n", inet_ntoa(sin.sin_addr), g_ntohs(sin.sin_port));
794 #endif
795
796         return g_ntohs(sin.sin_port);
797 }
798
799 static int udp_check_for_data(int sock)
800 {
801         char buf[1025], **lines;
802         char *valptr;
803         gchar *title;
804         gint len, i;
805         struct sockaddr_in from;
806         socklen_t fromlen;
807
808         fromlen = sizeof(struct sockaddr_in);
809
810         if ((len = recvfrom(sock, buf, 1024, 0, (struct sockaddr *)&from, &fromlen)) < 0)
811         {
812                 if (errno != EAGAIN)
813                 {
814                         g_log(NULL, G_LOG_LEVEL_CRITICAL,
815                               "udp_read_data(): Error reading from socket: %s", strerror(errno));
816                         return -1;
817                 }
818                 return 0;
819         }
820         buf[len] = '\0';
821 #ifdef DEBUG_UDP
822         fprintf (stderr,"Received: [%s]\n", buf);
823 #endif
824         lines = g_strsplit(buf, "\n", 0);
825         if (!lines)
826                 return 0;
827
828         for (i = 0; lines[i]; i++)
829         {
830                 while ((lines[i][strlen(lines[i]) - 1] == '\n') ||
831                        (lines[i][strlen(lines[i]) - 1] == '\r'))
832                         lines[i][strlen(lines[i]) - 1] = '\0';
833
834                 valptr = strchr(lines[i], ':');
835
836                 if (!valptr)
837                         continue;
838                 else
839                         valptr++;
840
841                 g_strstrip(valptr);
842                 if (!strlen(valptr))
843                         continue;
844
845                 if (strstr(lines[i], "x-audiocast-streamtitle") != NULL)
846                 {
847                         title = g_strdup_printf ("%s (%s)", valptr, icy_name);
848                         if (going)
849                                 set_track_info(title, -1);
850                         g_free (title);
851                 }
852
853 #if 0
854                 else if (strstr(lines[i], "x-audiocast-streamlength") != NULL)
855                 {
856                         if (atoi(valptr) != -1)
857                                 set_track_info(NULL, atoi(valptr));
858                 }
859 #endif
860
861                 else if (strstr(lines[i], "x-audiocast-streammsg") != NULL)
862                 {
863                         /* set_track_info(title, -1); */
864 /*                      xmms_show_message(_("Message"), valptr, _("Ok"), */
865 /*                                        FALSE, NULL, NULL); */
866                         g_message("Stream_message: %s", valptr);
867                 }
868
869 #if 0
870                 /* Use this to direct your webbrowser.. yeah right.. */
871                 else if (strstr(lines[i], "x-audiocast-streamurl") != NULL)
872                 {
873                         if (lasturl && g_strcmp (valptr, lasturl))
874                         {
875                                 c_message (stderr, "Song URL: %s\n", valptr);
876                                 g_free (lasturl);
877                                 lasturl = g_strdup (valptr);
878                         }
879                 }
880 #endif
881                 else if (strstr(lines[i], "x-audiocast-udpseqnr:") != NULL)
882                 {
883                         gchar obuf[60];
884                         sprintf(obuf, "x-audiocast-ack: %ld \r\n", atol(valptr));
885                         if (sendto(sock, obuf, strlen(obuf), 0, (struct sockaddr *) &from, fromlen) < 0)
886                         {
887                                 g_log(NULL, G_LOG_LEVEL_WARNING,
888                                       "udp_check_for_data(): Unable to send ack to server: %s", strerror(errno));
889                         }
890 #ifdef DEBUG_UDP
891                         else
892                                 fprintf(stderr,"Sent ack: %s", obuf);
893                         fprintf (stderr,"Remote: %s:%d\n", inet_ntoa(from.sin_addr), g_ntohs(from.sin_port));
894 #endif
895                 }
896         }
897         g_strfreev(lines);
898         return 0;
899 }