tls: remove tls_Recv() and tls_Send()
[vlc.git] / src / network / httpd.c
1 /*****************************************************************************
2  * httpd.c
3  *****************************************************************************
4  * Copyright (C) 2004-2006 VLC authors and VideoLAN
5  * Copyright © 2004-2007 Rémi Denis-Courmont
6  * $Id$
7  *
8  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9  *          Rémi Denis-Courmont <rem # videolan.org>
10  *
11  * This program is free software; you can redistribute it and/or modify it
12  * under the terms of the GNU Lesser General Public License as published by
13  * the Free Software Foundation; either version 2.1 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public License
22  * along with this program; if not, write to the Free Software Foundation,
23  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24  *****************************************************************************/
25
26 #ifdef HAVE_CONFIG_H
27 # include "config.h"
28 #endif
29
30 #include <vlc_common.h>
31 #include <vlc_httpd.h>
32
33 #include <assert.h>
34
35 #include <vlc_network.h>
36 #include <vlc_tls.h>
37 #include <vlc_strings.h>
38 #include <vlc_rand.h>
39 #include <vlc_charset.h>
40 #include <vlc_url.h>
41 #include <vlc_mime.h>
42 #include <vlc_block.h>
43 #include "../libvlc.h"
44
45 #include <string.h>
46 #include <errno.h>
47 #include <unistd.h>
48
49 #ifdef HAVE_POLL
50 # include <poll.h>
51 #endif
52
53 #if defined(_WIN32)
54 #   include <winsock2.h>
55 #else
56 #   include <sys/socket.h>
57 #endif
58
59 #if defined(_WIN32)
60 /* We need HUGE buffer otherwise TCP throughput is very limited */
61 #define HTTPD_CL_BUFSIZE 1000000
62 #else
63 #define HTTPD_CL_BUFSIZE 10000
64 #endif
65
66 static void httpd_ClientDestroy(httpd_client_t *cl);
67 static void httpd_AppendData(httpd_stream_t *stream, uint8_t *p_data, int i_data);
68
69 /* each host run in his own thread */
70 struct httpd_host_t
71 {
72     VLC_COMMON_MEMBERS
73
74     /* ref count */
75     unsigned    i_ref;
76
77     /* address/port and socket for listening at connections */
78     int         *fds;
79     unsigned     nfd;
80     unsigned     port;
81
82     vlc_thread_t thread;
83     vlc_mutex_t lock;
84     vlc_cond_t  wait;
85
86     /* all registered url (becarefull that 2 httpd_url_t could point at the same url)
87      * This will slow down the url research but make my live easier
88      * All url will have their cb trigger, but only the first one can answer
89      * */
90     int         i_url;
91     httpd_url_t **url;
92
93     int            i_client;
94     httpd_client_t **client;
95
96     /* TLS data */
97     vlc_tls_creds_t *p_tls;
98 };
99
100
101 struct httpd_url_t
102 {
103     httpd_host_t *host;
104
105     vlc_mutex_t lock;
106
107     char      *psz_url;
108     char      *psz_user;
109     char      *psz_password;
110
111     struct
112     {
113         httpd_callback_t     cb;
114         httpd_callback_sys_t *p_sys;
115     } catch[HTTPD_MSG_MAX];
116 };
117
118 /* status */
119 enum
120 {
121     HTTPD_CLIENT_RECEIVING,
122     HTTPD_CLIENT_RECEIVE_DONE,
123
124     HTTPD_CLIENT_SENDING,
125     HTTPD_CLIENT_SEND_DONE,
126
127     HTTPD_CLIENT_WAITING,
128
129     HTTPD_CLIENT_DEAD,
130
131     HTTPD_CLIENT_TLS_HS_IN,
132     HTTPD_CLIENT_TLS_HS_OUT
133 };
134
135 /* mode */
136 enum
137 {
138     HTTPD_CLIENT_FILE,      /* default */
139     HTTPD_CLIENT_STREAM,    /* regulary get data from cb */
140 };
141
142 struct httpd_client_t
143 {
144     httpd_url_t *url;
145
146     int     i_ref;
147
148     int     fd;
149
150     bool    b_stream_mode;
151     uint8_t i_state;
152
153     mtime_t i_activity_date;
154     mtime_t i_activity_timeout;
155
156     /* buffer for reading header */
157     int     i_buffer_size;
158     int     i_buffer;
159     uint8_t *p_buffer;
160
161     /*
162      * If waiting for a keyframe, this is the position (in bytes) of the
163      * last keyframe the stream saw before this client connected.
164      * Otherwise, -1.
165      */
166     int64_t i_keyframe_wait_to_pass;
167
168     /* */
169     httpd_message_t query;  /* client -> httpd */
170     httpd_message_t answer; /* httpd -> client */
171
172     /* TLS data */
173     vlc_tls_t *p_tls;
174 };
175
176
177 /*****************************************************************************
178  * Various functions
179  *****************************************************************************/
180 static const char *httpd_ReasonFromCode(unsigned i_code)
181 {
182     typedef struct
183     {
184         unsigned   i_code;
185         const char psz_reason[36];
186     } http_status_info;
187
188     static const http_status_info http_reason[] =
189     {
190         /*{ 100, "Continue" },
191           { 101, "Switching Protocols" },*/
192         { 200, "OK" },
193         /*{ 201, "Created" },
194           { 202, "Accepted" },
195           { 203, "Non-authoritative information" },
196           { 204, "No content" },
197           { 205, "Reset content" },
198           { 206, "Partial content" },
199           { 250, "Low on storage space" },
200           { 300, "Multiple choices" },*/
201         { 301, "Moved permanently" },
202         /*{ 302, "Moved temporarily" },
203           { 303, "See other" },
204           { 304, "Not modified" },
205           { 305, "Use proxy" },
206           { 307, "Temporary redirect" },
207           { 400, "Bad request" },*/
208         { 401, "Unauthorized" },
209         /*{ 402, "Payment Required" },*/
210         { 403, "Forbidden" },
211         { 404, "Not found" },
212         { 405, "Method not allowed" },
213         /*{ 406, "Not acceptable" },
214           { 407, "Proxy authentication required" },
215           { 408, "Request time-out" },
216           { 409, "Conflict" },
217           { 410, "Gone" },
218           { 411, "Length required" },
219           { 412, "Precondition failed" },
220           { 413, "Request entity too large" },
221           { 414, "Request-URI too large" },
222           { 415, "Unsupported media Type" },
223           { 416, "Requested range not satisfiable" },
224           { 417, "Expectation failed" },
225           { 451, "Parameter not understood" },
226           { 452, "Conference not found" },
227           { 453, "Not enough bandwidth" },*/
228         { 454, "Session not found" },
229         { 455, "Method not valid in this State" },
230         { 456, "Header field not valid for resource" },
231         { 457, "Invalid range" },
232         /*{ 458, "Read-only parameter" },*/
233         { 459, "Aggregate operation not allowed" },
234         { 460, "Non-aggregate operation not allowed" },
235         { 461, "Unsupported transport" },
236         /*{ 462, "Destination unreachable" },*/
237         { 500, "Internal server error" },
238         { 501, "Not implemented" },
239         /*{ 502, "Bad gateway" },*/
240         { 503, "Service unavailable" },
241         /*{ 504, "Gateway time-out" },*/
242         { 505, "Protocol version not supported" },
243         { 551, "Option not supported" },
244         { 999, "" }
245     };
246
247     static const char psz_fallback_reason[5][16] = {
248         "Continue", "OK", "Found", "Client error", "Server error"
249     };
250
251     assert((i_code >= 100) && (i_code <= 599));
252
253     const http_status_info *p = http_reason;
254     while (i_code < p->i_code)
255         p++;
256
257     if (p->i_code == i_code)
258         return p->psz_reason;
259
260     return psz_fallback_reason[(i_code / 100) - 1];
261 }
262
263 static size_t httpd_HtmlError (char **body, int code, const char *url)
264 {
265     const char *errname = httpd_ReasonFromCode (code);
266     assert (errname);
267
268     char *url_Encoded = vlc_xml_encode (url ? url : "");
269
270     int res = asprintf (body,
271         "<?xml version=\"1.0\" encoding=\"ascii\" ?>\n"
272         "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\""
273         " \"http://www.w3.org/TR/xhtml10/DTD/xhtml10strict.dtd\">\n"
274         "<html lang=\"en\">\n"
275         "<head>\n"
276         "<title>%s</title>\n"
277         "</head>\n"
278         "<body>\n"
279         "<h1>%d %s%s%s%s</h1>\n"
280         "<hr />\n"
281         "<a href=\"http://www.videolan.org\">VideoLAN</a>\n"
282         "</body>\n"
283         "</html>\n", errname, code, errname,
284         (url_Encoded ? " (" : ""), (url_Encoded ? url_Encoded : ""), (url_Encoded ? ")" : ""));
285
286     free (url_Encoded);
287
288     if (res == -1) {
289         *body = NULL;
290         return 0;
291     }
292
293     return (size_t)res;
294 }
295
296
297 /*****************************************************************************
298  * High Level Functions: httpd_file_t
299  *****************************************************************************/
300 struct httpd_file_t
301 {
302     httpd_url_t *url;
303     httpd_file_callback_t pf_fill;
304     httpd_file_sys_t      *p_sys;
305     char mime[1];
306 };
307
308 static int
309 httpd_FileCallBack(httpd_callback_sys_t *p_sys, httpd_client_t *cl,
310                     httpd_message_t *answer, const httpd_message_t *query)
311 {
312     httpd_file_t *file = (httpd_file_t*)p_sys;
313     uint8_t **pp_body, *p_body; const char *psz_connection;
314     int *pi_body, i_body;
315
316     if (!answer || !query )
317         return VLC_SUCCESS;
318
319     answer->i_proto  = HTTPD_PROTO_HTTP;
320     answer->i_version= 1;
321     answer->i_type   = HTTPD_MSG_ANSWER;
322
323     answer->i_status = 200;
324
325     httpd_MsgAdd(answer, "Content-type",  "%s", file->mime);
326     httpd_MsgAdd(answer, "Cache-Control", "%s", "no-cache");
327
328     if (query->i_type != HTTPD_MSG_HEAD) {
329         pp_body = &answer->p_body;
330         pi_body = &answer->i_body;
331     } else {
332         /* The file still needs to be executed. */
333         p_body = NULL;
334         i_body = 0;
335         pp_body = &p_body;
336         pi_body = &i_body;
337     }
338
339     if (query->i_type == HTTPD_MSG_POST) {
340         /* msg_Warn not supported */
341     }
342
343     uint8_t *psz_args = query->psz_args;
344     file->pf_fill(file->p_sys, file, psz_args, pp_body, pi_body);
345
346     if (query->i_type == HTTPD_MSG_HEAD)
347         free(p_body);
348
349     /* We respect client request */
350     psz_connection = httpd_MsgGet(&cl->query, "Connection");
351     if (psz_connection)
352         httpd_MsgAdd(answer, "Connection", "%s", psz_connection);
353
354     httpd_MsgAdd(answer, "Content-Length", "%d", answer->i_body);
355
356     return VLC_SUCCESS;
357 }
358
359 httpd_file_t *httpd_FileNew(httpd_host_t *host,
360                              const char *psz_url, const char *psz_mime,
361                              const char *psz_user, const char *psz_password,
362                              httpd_file_callback_t pf_fill,
363                              httpd_file_sys_t *p_sys)
364 {
365     const char *mime = psz_mime;
366     if (mime == NULL || mime[0] == '\0')
367         mime = vlc_mime_Ext2Mime(psz_url);
368
369     size_t mimelen = strlen(mime);
370     httpd_file_t *file = malloc(sizeof(*file) + mimelen);
371     if (unlikely(file == NULL))
372         return NULL;
373
374     file->url = httpd_UrlNew(host, psz_url, psz_user, psz_password);
375     if (!file->url) {
376         free(file);
377         return NULL;
378     }
379
380     file->pf_fill = pf_fill;
381     file->p_sys   = p_sys;
382     memcpy(file->mime, mime, mimelen + 1);
383
384     httpd_UrlCatch(file->url, HTTPD_MSG_HEAD, httpd_FileCallBack,
385                     (httpd_callback_sys_t*)file);
386     httpd_UrlCatch(file->url, HTTPD_MSG_GET,  httpd_FileCallBack,
387                     (httpd_callback_sys_t*)file);
388     httpd_UrlCatch(file->url, HTTPD_MSG_POST, httpd_FileCallBack,
389                     (httpd_callback_sys_t*)file);
390
391     return file;
392 }
393
394 httpd_file_sys_t *httpd_FileDelete(httpd_file_t *file)
395 {
396     httpd_file_sys_t *p_sys = file->p_sys;
397
398     httpd_UrlDelete(file->url);
399     free(file);
400     return p_sys;
401 }
402
403 /*****************************************************************************
404  * High Level Functions: httpd_handler_t (for CGIs)
405  *****************************************************************************/
406 struct httpd_handler_t
407 {
408     httpd_url_t *url;
409
410     httpd_handler_callback_t pf_fill;
411     void                    *p_sys;
412
413 };
414
415 static int
416 httpd_HandlerCallBack(httpd_callback_sys_t *p_sys, httpd_client_t *cl,
417                        httpd_message_t *answer, const httpd_message_t *query)
418 {
419     httpd_handler_t *handler = (httpd_handler_t*)p_sys;
420     char psz_remote_addr[NI_MAXNUMERICHOST];
421
422     if (!answer || !query)
423         return VLC_SUCCESS;
424
425     answer->i_proto  = HTTPD_PROTO_NONE;
426     answer->i_type   = HTTPD_MSG_ANSWER;
427
428     /* We do it ourselves, thanks */
429     answer->i_status = 0;
430
431     if (!httpd_ClientIP(cl, psz_remote_addr, NULL))
432         *psz_remote_addr = '\0';
433
434     uint8_t *psz_args = query->psz_args;
435     handler->pf_fill(handler->p_sys, handler, query->psz_url, psz_args,
436                       query->i_type, query->p_body, query->i_body,
437                       psz_remote_addr, NULL,
438                       &answer->p_body, &answer->i_body);
439
440     if (query->i_type == HTTPD_MSG_HEAD) {
441         char *p = (char *)answer->p_body;
442
443         /* Looks for end of header (i.e. one empty line) */
444         while ((p = strchr(p, '\r')))
445             if (p[1] == '\n' && p[2] == '\r' && p[3] == '\n')
446                 break;
447
448         if (p) {
449             p[4] = '\0';
450             answer->i_body = strlen((char*)answer->p_body) + 1;
451             answer->p_body = xrealloc(answer->p_body, answer->i_body);
452         }
453     }
454
455     if (strncmp((char *)answer->p_body, "HTTP/1.", 7)) {
456         int i_status, i_headers;
457         char *psz_headers, *psz_new;
458         const char *psz_status;
459
460         if (!strncmp((char *)answer->p_body, "Status: ", 8)) {
461             /* Apache-style */
462             i_status = strtol((char *)&answer->p_body[8], &psz_headers, 0);
463             if (*psz_headers == '\r' || *psz_headers == '\n') psz_headers++;
464             if (*psz_headers == '\n') psz_headers++;
465             i_headers = answer->i_body - (psz_headers - (char *)answer->p_body);
466         } else {
467             i_status = 200;
468             psz_headers = (char *)answer->p_body;
469             i_headers = answer->i_body;
470         }
471
472         psz_status = httpd_ReasonFromCode(i_status);
473         answer->i_body = sizeof("HTTP/1.0 xxx \r\n")
474                         + strlen(psz_status) + i_headers - 1;
475         psz_new = (char *)xmalloc(answer->i_body + 1);
476         sprintf(psz_new, "HTTP/1.0 %03d %s\r\n", i_status, psz_status);
477         memcpy(&psz_new[strlen(psz_new)], psz_headers, i_headers);
478         free(answer->p_body);
479         answer->p_body = (uint8_t *)psz_new;
480     }
481
482     return VLC_SUCCESS;
483 }
484
485 httpd_handler_t *httpd_HandlerNew(httpd_host_t *host, const char *psz_url,
486                                   const char *psz_user,
487                                   const char *psz_password,
488                                   httpd_handler_callback_t pf_fill,
489                                   void *p_sys)
490 {
491     httpd_handler_t *handler = malloc(sizeof(*handler));
492     if (!handler)
493         return NULL;
494
495     handler->url = httpd_UrlNew(host, psz_url, psz_user, psz_password);
496     if (!handler->url) {
497         free(handler);
498         return NULL;
499     }
500
501     handler->pf_fill = pf_fill;
502     handler->p_sys   = p_sys;
503
504     httpd_UrlCatch(handler->url, HTTPD_MSG_HEAD, httpd_HandlerCallBack,
505                     (httpd_callback_sys_t*)handler);
506     httpd_UrlCatch(handler->url, HTTPD_MSG_GET,  httpd_HandlerCallBack,
507                     (httpd_callback_sys_t*)handler);
508     httpd_UrlCatch(handler->url, HTTPD_MSG_POST, httpd_HandlerCallBack,
509                     (httpd_callback_sys_t*)handler);
510
511     return handler;
512 }
513
514 void *httpd_HandlerDelete(httpd_handler_t *handler)
515 {
516     void *p_sys = handler->p_sys;
517     httpd_UrlDelete(handler->url);
518     free(handler);
519     return p_sys;
520 }
521
522 /*****************************************************************************
523  * High Level Functions: httpd_redirect_t
524  *****************************************************************************/
525 struct httpd_redirect_t
526 {
527     httpd_url_t *url;
528     char         dst[1];
529 };
530
531 static int httpd_RedirectCallBack(httpd_callback_sys_t *p_sys,
532                                    httpd_client_t *cl, httpd_message_t *answer,
533                                    const httpd_message_t *query)
534 {
535     httpd_redirect_t *rdir = (httpd_redirect_t*)p_sys;
536     char *p_body;
537     (void)cl;
538
539     if (!answer || !query)
540         return VLC_SUCCESS;
541
542     answer->i_proto  = HTTPD_PROTO_HTTP;
543     answer->i_version= 1;
544     answer->i_type   = HTTPD_MSG_ANSWER;
545     answer->i_status = 301;
546
547     answer->i_body = httpd_HtmlError (&p_body, 301, rdir->dst);
548     answer->p_body = (unsigned char *)p_body;
549
550     /* XXX check if it's ok or we need to set an absolute url */
551     httpd_MsgAdd(answer, "Location",  "%s", rdir->dst);
552
553     httpd_MsgAdd(answer, "Content-Length", "%d", answer->i_body);
554
555     return VLC_SUCCESS;
556 }
557
558 httpd_redirect_t *httpd_RedirectNew(httpd_host_t *host, const char *psz_url_dst,
559                                      const char *psz_url_src)
560 {
561     size_t dstlen = strlen(psz_url_dst);
562
563     httpd_redirect_t *rdir = malloc(sizeof(*rdir) + dstlen);
564     if (unlikely(rdir == NULL))
565         return NULL;
566
567     rdir->url = httpd_UrlNew(host, psz_url_src, NULL, NULL);
568     if (!rdir->url) {
569         free(rdir);
570         return NULL;
571     }
572     memcpy(rdir->dst, psz_url_dst, dstlen + 1);
573
574     /* Redirect apply for all HTTP request and RTSP DESCRIBE resquest */
575     httpd_UrlCatch(rdir->url, HTTPD_MSG_HEAD, httpd_RedirectCallBack,
576                     (httpd_callback_sys_t*)rdir);
577     httpd_UrlCatch(rdir->url, HTTPD_MSG_GET, httpd_RedirectCallBack,
578                     (httpd_callback_sys_t*)rdir);
579     httpd_UrlCatch(rdir->url, HTTPD_MSG_POST, httpd_RedirectCallBack,
580                     (httpd_callback_sys_t*)rdir);
581     httpd_UrlCatch(rdir->url, HTTPD_MSG_DESCRIBE, httpd_RedirectCallBack,
582                     (httpd_callback_sys_t*)rdir);
583
584     return rdir;
585 }
586 void httpd_RedirectDelete(httpd_redirect_t *rdir)
587 {
588     httpd_UrlDelete(rdir->url);
589     free(rdir);
590 }
591
592 /*****************************************************************************
593  * High Level Funtions: httpd_stream_t
594  *****************************************************************************/
595 struct httpd_stream_t
596 {
597     vlc_mutex_t lock;
598     httpd_url_t *url;
599
600     char    *psz_mime;
601
602     /* Header to send as first packet */
603     uint8_t *p_header;
604     int     i_header;
605
606     /* Some muxes, in particular the avformat mux, can mark given blocks
607      * as keyframes, to ensure that the stream starts with one.
608      * (This is particularly important for WebM streaming to certain
609      * browsers.) Store if we've ever seen any such keyframe blocks,
610      * and if so, the byte position of the start of the last one. */
611     bool        b_has_keyframes;
612     int64_t     i_last_keyframe_seen_pos;
613
614     /* circular buffer */
615     int         i_buffer_size;      /* buffer size, can't be reallocated smaller */
616     uint8_t     *p_buffer;          /* buffer */
617     int64_t     i_buffer_pos;       /* absolute position from beginning */
618     int64_t     i_buffer_last_pos;  /* a new connection will start with that */
619
620     /* custom headers */
621     size_t        i_http_headers;
622     httpd_header * p_http_headers;
623 };
624
625 static int httpd_StreamCallBack(httpd_callback_sys_t *p_sys,
626                                  httpd_client_t *cl, httpd_message_t *answer,
627                                  const httpd_message_t *query)
628 {
629     httpd_stream_t *stream = (httpd_stream_t*)p_sys;
630
631     if (!answer || !query || !cl)
632         return VLC_SUCCESS;
633
634     if (answer->i_body_offset > 0) {
635         int     i_pos;
636
637         if (answer->i_body_offset >= stream->i_buffer_pos)
638             return VLC_EGENERIC;    /* wait, no data available */
639
640         if (cl->i_keyframe_wait_to_pass >= 0) {
641             if (stream->i_last_keyframe_seen_pos <= cl->i_keyframe_wait_to_pass)
642                 /* still waiting for the next keyframe */
643                 return VLC_EGENERIC;
644
645             /* seek to the new keyframe */
646             answer->i_body_offset = stream->i_last_keyframe_seen_pos;
647             cl->i_keyframe_wait_to_pass = -1;
648         }
649
650         if (answer->i_body_offset + stream->i_buffer_size < stream->i_buffer_pos)
651             answer->i_body_offset = stream->i_buffer_last_pos; /* this client isn't fast enough */
652
653         i_pos   = answer->i_body_offset % stream->i_buffer_size;
654         int64_t i_write = stream->i_buffer_pos - answer->i_body_offset;
655
656         if (i_write > HTTPD_CL_BUFSIZE)
657             i_write = HTTPD_CL_BUFSIZE;
658         else if (i_write <= 0)
659             return VLC_EGENERIC;    /* wait, no data available */
660
661         /* Don't go past the end of the circular buffer */
662         i_write = __MIN(i_write, stream->i_buffer_size - i_pos);
663
664         /* using HTTPD_MSG_ANSWER -> data available */
665         answer->i_proto  = HTTPD_PROTO_HTTP;
666         answer->i_version= 0;
667         answer->i_type   = HTTPD_MSG_ANSWER;
668
669         answer->i_body = i_write;
670         answer->p_body = xmalloc(i_write);
671         memcpy(answer->p_body, &stream->p_buffer[i_pos], i_write);
672
673         answer->i_body_offset += i_write;
674
675         return VLC_SUCCESS;
676     } else {
677         answer->i_proto  = HTTPD_PROTO_HTTP;
678         answer->i_version= 0;
679         answer->i_type   = HTTPD_MSG_ANSWER;
680
681         answer->i_status = 200;
682
683         bool b_has_content_type = false;
684         bool b_has_cache_control = false;
685
686         vlc_mutex_lock(&stream->lock);
687         for (size_t i = 0; i < stream->i_http_headers; i++)
688             if (strncasecmp(stream->p_http_headers[i].name, "Content-Length", 14)) {
689                 httpd_MsgAdd(answer, stream->p_http_headers[i].name, "%s",
690                               stream->p_http_headers[i].value);
691
692                 if (!strncasecmp(stream->p_http_headers[i].name, "Content-Type", 12))
693                     b_has_content_type = true;
694                 else if (!strncasecmp(stream->p_http_headers[i].name, "Cache-Control", 13))
695                     b_has_cache_control = true;
696             }
697         vlc_mutex_unlock(&stream->lock);
698
699         if (query->i_type != HTTPD_MSG_HEAD) {
700             cl->b_stream_mode = true;
701             vlc_mutex_lock(&stream->lock);
702             /* Send the header */
703             if (stream->i_header > 0) {
704                 answer->i_body = stream->i_header;
705                 answer->p_body = xmalloc(stream->i_header);
706                 memcpy(answer->p_body, stream->p_header, stream->i_header);
707             }
708             answer->i_body_offset = stream->i_buffer_last_pos;
709             if (stream->b_has_keyframes)
710                 cl->i_keyframe_wait_to_pass = stream->i_last_keyframe_seen_pos;
711             else
712                 cl->i_keyframe_wait_to_pass = -1;
713             vlc_mutex_unlock(&stream->lock);
714         } else {
715             httpd_MsgAdd(answer, "Content-Length", "0");
716             answer->i_body_offset = 0;
717         }
718
719         /* FIXME: move to http access_output */
720         if (!strcmp(stream->psz_mime, "video/x-ms-asf-stream")) {
721             bool b_xplaystream = false;
722
723             httpd_MsgAdd(answer, "Content-type", "application/octet-stream");
724             httpd_MsgAdd(answer, "Server", "Cougar 4.1.0.3921");
725             httpd_MsgAdd(answer, "Pragma", "no-cache");
726             httpd_MsgAdd(answer, "Pragma", "client-id=%lu",
727                           vlc_mrand48()&0x7fff);
728             httpd_MsgAdd(answer, "Pragma", "features=\"broadcast\"");
729
730             /* Check if there is a xPlayStrm=1 */
731             for (size_t i = 0; i < query->i_headers; i++)
732                 if (!strcasecmp(query->p_headers[i].name,  "Pragma") &&
733                     strstr(query->p_headers[i].value, "xPlayStrm=1"))
734                     b_xplaystream = true;
735
736             if (!b_xplaystream)
737                 answer->i_body_offset = 0;
738         } else if (!b_has_content_type)
739             httpd_MsgAdd(answer, "Content-type", "%s", stream->psz_mime);
740
741         if (!b_has_cache_control)
742             httpd_MsgAdd(answer, "Cache-Control", "no-cache");
743         return VLC_SUCCESS;
744     }
745 }
746
747 httpd_stream_t *httpd_StreamNew(httpd_host_t *host,
748                                  const char *psz_url, const char *psz_mime,
749                                  const char *psz_user, const char *psz_password)
750 {
751     httpd_stream_t *stream = malloc(sizeof(*stream));
752     if (!stream)
753         return NULL;
754
755     stream->url = httpd_UrlNew(host, psz_url, psz_user, psz_password);
756     if (!stream->url) {
757         free(stream);
758         return NULL;
759     }
760
761     vlc_mutex_init(&stream->lock);
762     if (psz_mime == NULL || psz_mime[0] == '\0')
763         psz_mime = vlc_mime_Ext2Mime(psz_url);
764     stream->psz_mime = xstrdup(psz_mime);
765
766     stream->i_header = 0;
767     stream->p_header = NULL;
768     stream->i_buffer_size = 5000000;    /* 5 Mo per stream */
769     stream->p_buffer = xmalloc(stream->i_buffer_size);
770     /* We set to 1 to make life simpler
771      * (this way i_body_offset can never be 0) */
772     stream->i_buffer_pos = 1;
773     stream->i_buffer_last_pos = 1;
774     stream->b_has_keyframes = false;
775     stream->i_last_keyframe_seen_pos = 0;
776     stream->i_http_headers = 0;
777     stream->p_http_headers = NULL;
778
779     httpd_UrlCatch(stream->url, HTTPD_MSG_HEAD, httpd_StreamCallBack,
780                     (httpd_callback_sys_t*)stream);
781     httpd_UrlCatch(stream->url, HTTPD_MSG_GET, httpd_StreamCallBack,
782                     (httpd_callback_sys_t*)stream);
783     httpd_UrlCatch(stream->url, HTTPD_MSG_POST, httpd_StreamCallBack,
784                     (httpd_callback_sys_t*)stream);
785
786     return stream;
787 }
788
789 int httpd_StreamHeader(httpd_stream_t *stream, uint8_t *p_data, int i_data)
790 {
791     vlc_mutex_lock(&stream->lock);
792     free(stream->p_header);
793     stream->p_header = NULL;
794
795     stream->i_header = i_data;
796     if (i_data > 0) {
797         stream->p_header = xmalloc(i_data);
798         memcpy(stream->p_header, p_data, i_data);
799     }
800     vlc_mutex_unlock(&stream->lock);
801
802     return VLC_SUCCESS;
803 }
804
805 static void httpd_AppendData(httpd_stream_t *stream, uint8_t *p_data, int i_data)
806 {
807     int i_pos = stream->i_buffer_pos % stream->i_buffer_size;
808     int i_count = i_data;
809     while (i_count > 0) {
810         int i_copy = __MIN(i_count, stream->i_buffer_size - i_pos);
811
812         /* Ok, we can't go past the end of our buffer */
813         memcpy(&stream->p_buffer[i_pos], p_data, i_copy);
814
815         i_pos = (i_pos + i_copy) % stream->i_buffer_size;
816         i_count -= i_copy;
817         p_data  += i_copy;
818     }
819
820     stream->i_buffer_pos += i_data;
821 }
822
823 int httpd_StreamSend(httpd_stream_t *stream, const block_t *p_block)
824 {
825     if (!p_block || !p_block->p_buffer)
826         return VLC_SUCCESS;
827
828     vlc_mutex_lock(&stream->lock);
829
830     /* save this pointer (to be used by new connection) */
831     stream->i_buffer_last_pos = stream->i_buffer_pos;
832
833     if (p_block->i_flags & BLOCK_FLAG_TYPE_I) {
834         stream->b_has_keyframes = true;
835         stream->i_last_keyframe_seen_pos = stream->i_buffer_pos;
836     }
837
838     httpd_AppendData(stream, p_block->p_buffer, p_block->i_buffer);
839
840     vlc_mutex_unlock(&stream->lock);
841     return VLC_SUCCESS;
842 }
843
844 void httpd_StreamDelete(httpd_stream_t *stream)
845 {
846     httpd_UrlDelete(stream->url);
847     for (size_t i = 0; i < stream->i_http_headers; i++) {
848         free(stream->p_http_headers[i].name);
849         free(stream->p_http_headers[i].value);
850     }
851     free(stream->p_http_headers);
852     vlc_mutex_destroy(&stream->lock);
853     free(stream->psz_mime);
854     free(stream->p_header);
855     free(stream->p_buffer);
856     free(stream);
857 }
858
859 /*****************************************************************************
860  * Low level
861  *****************************************************************************/
862 static void* httpd_HostThread(void *);
863 static httpd_host_t *httpd_HostCreate(vlc_object_t *, const char *,
864                                        const char *, vlc_tls_creds_t *);
865
866 /* create a new host */
867 httpd_host_t *vlc_http_HostNew(vlc_object_t *p_this)
868 {
869     return httpd_HostCreate(p_this, "http-host", "http-port", NULL);
870 }
871
872 httpd_host_t *vlc_https_HostNew(vlc_object_t *obj)
873 {
874     char *cert = var_InheritString(obj, "http-cert");
875     if (!cert) {
876         msg_Err(obj, "HTTP/TLS certificate not specified!");
877         return NULL;
878     }
879
880     char *key = var_InheritString(obj, "http-key");
881     vlc_tls_creds_t *tls = vlc_tls_ServerCreate(obj, cert, key);
882
883     if (!tls) {
884         msg_Err(obj, "HTTP/TLS certificate error (%s and %s)",
885                  cert, key ? key : cert);
886         free(key);
887         free(cert);
888         return NULL;
889     }
890     free(key);
891     free(cert);
892
893     return httpd_HostCreate(obj, "http-host", "https-port", tls);
894 }
895
896 httpd_host_t *vlc_rtsp_HostNew(vlc_object_t *p_this)
897 {
898     return httpd_HostCreate(p_this, "rtsp-host", "rtsp-port", NULL);
899 }
900
901 static struct httpd
902 {
903     vlc_mutex_t  mutex;
904
905     httpd_host_t **host;
906     int          i_host;
907 } httpd = { VLC_STATIC_MUTEX, NULL, 0 };
908
909 static httpd_host_t *httpd_HostCreate(vlc_object_t *p_this,
910                                        const char *hostvar,
911                                        const char *portvar,
912                                        vlc_tls_creds_t *p_tls)
913 {
914     httpd_host_t *host;
915     char *hostname = var_InheritString(p_this, hostvar);
916     unsigned port = var_InheritInteger(p_this, portvar);
917
918     vlc_url_t url;
919     vlc_UrlParse(&url, hostname);
920     free(hostname);
921     if (url.i_port != 0) {
922         msg_Err(p_this, "Ignoring port %d (using %d)", url.i_port, port);
923         msg_Info(p_this, "Specify port %d separately with the "
924                           "%s option instead.", url.i_port, portvar);
925     }
926
927     /* to be sure to avoid multiple creation */
928     vlc_mutex_lock(&httpd.mutex);
929
930     /* verify if it already exist */
931     for (int i = 0; i < httpd.i_host; i++) {
932         host = httpd.host[i];
933
934         /* cannot mix TLS and non-TLS hosts */
935         if (host->port != port
936          || (host->p_tls != NULL) != (p_tls != NULL))
937             continue;
938
939         /* Increase existing matching host reference count.
940          * The reference count is written under both the global httpd and the
941          * host lock. It is read with either or both locks held. The global
942          * lock is always acquired first. */
943         vlc_mutex_lock(&host->lock);
944         host->i_ref++;
945         vlc_mutex_unlock(&host->lock);
946
947         vlc_mutex_unlock(&httpd.mutex);
948         vlc_UrlClean(&url);
949         vlc_tls_Delete(p_tls);
950         return host;
951     }
952
953     /* create the new host */
954     host = (httpd_host_t *)vlc_custom_create(p_this, sizeof (*host),
955                                               "http host");
956     if (!host)
957         goto error;
958
959     vlc_mutex_init(&host->lock);
960     vlc_cond_init(&host->wait);
961     host->i_ref = 1;
962
963     host->fds = net_ListenTCP(p_this, url.psz_host, port);
964     if (!host->fds) {
965         msg_Err(p_this, "cannot create socket(s) for HTTP host");
966         goto error;
967     }
968     for (host->nfd = 0; host->fds[host->nfd] != -1; host->nfd++);
969
970     host->port     = port;
971     host->i_url    = 0;
972     host->url      = NULL;
973     host->i_client = 0;
974     host->client   = NULL;
975     host->p_tls    = p_tls;
976
977     /* create the thread */
978     if (vlc_clone(&host->thread, httpd_HostThread, host,
979                    VLC_THREAD_PRIORITY_LOW)) {
980         msg_Err(p_this, "cannot spawn http host thread");
981         goto error;
982     }
983
984     /* now add it to httpd */
985     TAB_APPEND(httpd.i_host, httpd.host, host);
986     vlc_mutex_unlock(&httpd.mutex);
987
988     vlc_UrlClean(&url);
989
990     return host;
991
992 error:
993     vlc_mutex_unlock(&httpd.mutex);
994
995     if (host) {
996         net_ListenClose(host->fds);
997         vlc_cond_destroy(&host->wait);
998         vlc_mutex_destroy(&host->lock);
999         vlc_object_release(host);
1000     }
1001
1002     vlc_UrlClean(&url);
1003     vlc_tls_Delete(p_tls);
1004     return NULL;
1005 }
1006
1007 /* delete a host */
1008 void httpd_HostDelete(httpd_host_t *host)
1009 {
1010     bool delete = false;
1011
1012     vlc_mutex_lock(&httpd.mutex);
1013
1014     vlc_mutex_lock(&host->lock);
1015     host->i_ref--;
1016     if (host->i_ref == 0)
1017         delete = true;
1018     vlc_mutex_unlock(&host->lock);
1019     if (!delete) {
1020         /* still used */
1021         vlc_mutex_unlock(&httpd.mutex);
1022         msg_Dbg(host, "httpd_HostDelete: host still in use");
1023         return;
1024     }
1025     TAB_REMOVE(httpd.i_host, httpd.host, host);
1026
1027     vlc_cancel(host->thread);
1028     vlc_join(host->thread, NULL);
1029
1030     msg_Dbg(host, "HTTP host removed");
1031
1032     for (int i = 0; i < host->i_url; i++)
1033         msg_Err(host, "url still registered: %s", host->url[i]->psz_url);
1034
1035     for (int i = 0; i < host->i_client; i++) {
1036         msg_Warn(host, "client still connected");
1037         httpd_ClientDestroy(host->client[i]);
1038     }
1039     TAB_CLEAN(host->i_client, host->client);
1040
1041     vlc_tls_Delete(host->p_tls);
1042     net_ListenClose(host->fds);
1043     vlc_cond_destroy(&host->wait);
1044     vlc_mutex_destroy(&host->lock);
1045     vlc_object_release(host);
1046     vlc_mutex_unlock(&httpd.mutex);
1047 }
1048
1049 /* register a new url */
1050 httpd_url_t *httpd_UrlNew(httpd_host_t *host, const char *psz_url,
1051                            const char *psz_user, const char *psz_password)
1052 {
1053     httpd_url_t *url;
1054
1055     assert(psz_url);
1056
1057     vlc_mutex_lock(&host->lock);
1058     for (int i = 0; i < host->i_url; i++)
1059         if (!strcmp(psz_url, host->url[i]->psz_url)) {
1060             msg_Warn(host, "cannot add '%s' (url already defined)", psz_url);
1061             vlc_mutex_unlock(&host->lock);
1062             return NULL;
1063         }
1064
1065     url = xmalloc(sizeof(httpd_url_t));
1066     url->host = host;
1067
1068     vlc_mutex_init(&url->lock);
1069     url->psz_url = xstrdup(psz_url);
1070     url->psz_user = xstrdup(psz_user ? psz_user : "");
1071     url->psz_password = xstrdup(psz_password ? psz_password : "");
1072     for (int i = 0; i < HTTPD_MSG_MAX; i++) {
1073         url->catch[i].cb = NULL;
1074         url->catch[i].p_sys = NULL;
1075     }
1076
1077     TAB_APPEND(host->i_url, host->url, url);
1078     vlc_cond_signal(&host->wait);
1079     vlc_mutex_unlock(&host->lock);
1080
1081     return url;
1082 }
1083
1084 /* register callback on a url */
1085 int httpd_UrlCatch(httpd_url_t *url, int i_msg, httpd_callback_t cb,
1086                     httpd_callback_sys_t *p_sys)
1087 {
1088     vlc_mutex_lock(&url->lock);
1089     url->catch[i_msg].cb   = cb;
1090     url->catch[i_msg].p_sys= p_sys;
1091     vlc_mutex_unlock(&url->lock);
1092
1093     return VLC_SUCCESS;
1094 }
1095
1096 /* delete a url */
1097 void httpd_UrlDelete(httpd_url_t *url)
1098 {
1099     httpd_host_t *host = url->host;
1100
1101     vlc_mutex_lock(&host->lock);
1102     TAB_REMOVE(host->i_url, host->url, url);
1103
1104     vlc_mutex_destroy(&url->lock);
1105     free(url->psz_url);
1106     free(url->psz_user);
1107     free(url->psz_password);
1108
1109     for (int i = 0; i < host->i_client; i++) {
1110         httpd_client_t *client = host->client[i];
1111
1112         if (client->url != url)
1113             continue;
1114
1115         /* TODO complete it */
1116         msg_Warn(host, "force closing connections");
1117         TAB_REMOVE(host->i_client, host->client, client);
1118         httpd_ClientDestroy(client);
1119         i--;
1120     }
1121     free(url);
1122     vlc_mutex_unlock(&host->lock);
1123 }
1124
1125 static void httpd_MsgInit(httpd_message_t *msg)
1126 {
1127     msg->cl         = NULL;
1128     msg->i_type     = HTTPD_MSG_NONE;
1129     msg->i_proto    = HTTPD_PROTO_NONE;
1130     msg->i_version  = -1; /* FIXME */
1131
1132     msg->i_status   = 0;
1133
1134     msg->psz_url    = NULL;
1135     msg->psz_args   = NULL;
1136
1137     msg->i_headers  = 0;
1138     msg->p_headers  = NULL;
1139
1140     msg->i_body_offset = 0;
1141     msg->i_body        = 0;
1142     msg->p_body        = NULL;
1143 }
1144
1145 static void httpd_MsgClean(httpd_message_t *msg)
1146 {
1147     free(msg->psz_url);
1148     free(msg->psz_args);
1149     for (size_t i = 0; i < msg->i_headers; i++) {
1150         free(msg->p_headers[i].name);
1151         free(msg->p_headers[i].value);
1152     }
1153     free(msg->p_headers);
1154     free(msg->p_body);
1155     httpd_MsgInit(msg);
1156 }
1157
1158 const char *httpd_MsgGet(const httpd_message_t *msg, const char *name)
1159 {
1160     for (size_t i = 0; i < msg->i_headers; i++)
1161         if (!strcasecmp(msg->p_headers[i].name, name))
1162             return msg->p_headers[i].value;
1163     return NULL;
1164 }
1165
1166 void httpd_MsgAdd(httpd_message_t *msg, const char *name, const char *psz_value, ...)
1167 {
1168     httpd_header *p_tmp = realloc(msg->p_headers, sizeof(httpd_header) * (msg->i_headers + 1));
1169     if (!p_tmp)
1170         return;
1171
1172     msg->p_headers = p_tmp;
1173
1174     httpd_header *h = &msg->p_headers[msg->i_headers];
1175     h->name = strdup(name);
1176     if (!h->name)
1177         return;
1178
1179     h->value = NULL;
1180
1181     va_list args;
1182     va_start(args, psz_value);
1183     int ret = us_vasprintf(&h->value, psz_value, args);
1184     va_end(args);
1185
1186     if (ret == -1) {
1187         free(h->name);
1188         return;
1189     }
1190
1191     msg->i_headers++;
1192 }
1193
1194 static void httpd_ClientInit(httpd_client_t *cl, mtime_t now)
1195 {
1196     cl->i_state = HTTPD_CLIENT_RECEIVING;
1197     cl->i_activity_date = now;
1198     cl->i_activity_timeout = INT64_C(10000000);
1199     cl->i_buffer_size = HTTPD_CL_BUFSIZE;
1200     cl->i_buffer = 0;
1201     cl->p_buffer = xmalloc(cl->i_buffer_size);
1202     cl->i_keyframe_wait_to_pass = -1;
1203     cl->b_stream_mode = false;
1204
1205     httpd_MsgInit(&cl->query);
1206     httpd_MsgInit(&cl->answer);
1207 }
1208
1209 char* httpd_ClientIP(const httpd_client_t *cl, char *ip, int *port)
1210 {
1211     return net_GetPeerAddress(cl->fd, ip, port) ? NULL : ip;
1212 }
1213
1214 char* httpd_ServerIP(const httpd_client_t *cl, char *ip, int *port)
1215 {
1216     return net_GetSockAddress(cl->fd, ip, port) ? NULL : ip;
1217 }
1218
1219 static void httpd_ClientDestroy(httpd_client_t *cl)
1220 {
1221     if (cl->p_tls != NULL)
1222         vlc_tls_Close(cl->p_tls);
1223     else
1224         net_Close(cl->fd);
1225
1226     httpd_MsgClean(&cl->answer);
1227     httpd_MsgClean(&cl->query);
1228
1229     free(cl->p_buffer);
1230     free(cl);
1231 }
1232
1233 static httpd_client_t *httpd_ClientNew(int fd, vlc_tls_t *p_tls, mtime_t now)
1234 {
1235     httpd_client_t *cl = malloc(sizeof(httpd_client_t));
1236
1237     if (!cl) return NULL;
1238
1239     cl->i_ref   = 0;
1240     cl->fd      = fd;
1241     cl->url     = NULL;
1242     cl->p_tls = p_tls;
1243
1244     httpd_ClientInit(cl, now);
1245     if (p_tls)
1246         cl->i_state = HTTPD_CLIENT_TLS_HS_OUT;
1247
1248     return cl;
1249 }
1250
1251 static
1252 ssize_t httpd_NetRecv (httpd_client_t *cl, uint8_t *p, size_t i_len)
1253 {
1254     vlc_tls_t *p_tls;
1255     ssize_t val;
1256
1257     p_tls = cl->p_tls;
1258     do
1259         val = p_tls ? vlc_tls_Read(p_tls, p, i_len, false)
1260                     : recv (cl->fd, p, i_len, 0);
1261     while (val == -1 && errno == EINTR);
1262     return val;
1263 }
1264
1265 static
1266 ssize_t httpd_NetSend (httpd_client_t *cl, const uint8_t *p, size_t i_len)
1267 {
1268     vlc_tls_t *p_tls;
1269     ssize_t val;
1270
1271     p_tls = cl->p_tls;
1272     do
1273         val = p_tls ? vlc_tls_Write(p_tls, p, i_len)
1274                     : send (cl->fd, p, i_len, MSG_NOSIGNAL);
1275     while (val == -1 && errno == EINTR);
1276     return val;
1277 }
1278
1279
1280 static const struct
1281 {
1282     const char name[16];
1283     int  i_type;
1284     int  i_proto;
1285 }
1286 msg_type[] =
1287 {
1288     { "OPTIONS",       HTTPD_MSG_OPTIONS,      HTTPD_PROTO_RTSP },
1289     { "DESCRIBE",      HTTPD_MSG_DESCRIBE,     HTTPD_PROTO_RTSP },
1290     { "SETUP",         HTTPD_MSG_SETUP,        HTTPD_PROTO_RTSP },
1291     { "PLAY",          HTTPD_MSG_PLAY,         HTTPD_PROTO_RTSP },
1292     { "PAUSE",         HTTPD_MSG_PAUSE,        HTTPD_PROTO_RTSP },
1293     { "GET_PARAMETER", HTTPD_MSG_GETPARAMETER, HTTPD_PROTO_RTSP },
1294     { "TEARDOWN",      HTTPD_MSG_TEARDOWN,     HTTPD_PROTO_RTSP },
1295     { "GET",           HTTPD_MSG_GET,          HTTPD_PROTO_HTTP },
1296     { "HEAD",          HTTPD_MSG_HEAD,         HTTPD_PROTO_HTTP },
1297     { "POST",          HTTPD_MSG_POST,         HTTPD_PROTO_HTTP },
1298     { "",              HTTPD_MSG_NONE,         HTTPD_PROTO_NONE }
1299 };
1300
1301
1302 static void httpd_ClientRecv(httpd_client_t *cl)
1303 {
1304     int i_len;
1305
1306     /* ignore leading whites */
1307     if (cl->query.i_proto == HTTPD_PROTO_NONE && cl->i_buffer == 0) {
1308         unsigned char c;
1309
1310         i_len = httpd_NetRecv(cl, &c, 1);
1311
1312         if (i_len > 0 && !strchr("\r\n\t ", c)) {
1313             cl->p_buffer[0] = c;
1314             cl->i_buffer++;
1315         }
1316     } else if (cl->query.i_proto == HTTPD_PROTO_NONE) {
1317         /* enough to see if it's Interleaved RTP over RTSP or RTSP/HTTP */
1318         i_len = httpd_NetRecv(cl, &cl->p_buffer[cl->i_buffer],
1319                                7 - cl->i_buffer);
1320         if (i_len > 0)
1321             cl->i_buffer += i_len;
1322
1323         /* The smallest legal request is 7 bytes ("GET /\r\n"),
1324          * this is the maximum we can ask at this point. */
1325         if (cl->i_buffer >= 7) {
1326             if (!memcmp(cl->p_buffer, "HTTP/1.", 7)) {
1327                 cl->query.i_proto = HTTPD_PROTO_HTTP;
1328                 cl->query.i_type  = HTTPD_MSG_ANSWER;
1329             } else if (!memcmp(cl->p_buffer, "RTSP/1.", 7)) {
1330                 cl->query.i_proto = HTTPD_PROTO_RTSP;
1331                 cl->query.i_type  = HTTPD_MSG_ANSWER;
1332             } else {
1333                 /* We need the full request line to determine the protocol. */
1334                 cl->query.i_proto = HTTPD_PROTO_HTTP0;
1335                 cl->query.i_type  = HTTPD_MSG_NONE;
1336             }
1337         }
1338     } else if (cl->query.i_body > 0) {
1339         /* we are reading the body of a request or a channel */
1340         assert (cl->query.p_body != NULL);
1341         i_len = httpd_NetRecv(cl, &cl->query.p_body[cl->i_buffer],
1342                                cl->query.i_body - cl->i_buffer);
1343         if (i_len > 0)
1344             cl->i_buffer += i_len;
1345
1346         if (cl->i_buffer >= cl->query.i_body)
1347             cl->i_state = HTTPD_CLIENT_RECEIVE_DONE;
1348     } else for (;;) { /* we are reading a header -> char by char */
1349         if (cl->i_buffer == cl->i_buffer_size) {
1350             uint8_t *newbuf = realloc(cl->p_buffer, cl->i_buffer_size + 1024);
1351             if (!newbuf) {
1352                 i_len = 0;
1353                 break;
1354             }
1355
1356             cl->p_buffer = newbuf;
1357             cl->i_buffer_size += 1024;
1358         }
1359
1360         i_len = httpd_NetRecv (cl, &cl->p_buffer[cl->i_buffer], 1);
1361         if (i_len <= 0)
1362             break;
1363
1364         cl->i_buffer++;
1365
1366         if ((cl->query.i_proto == HTTPD_PROTO_HTTP0)
1367                 && (cl->p_buffer[cl->i_buffer - 1] == '\n'))
1368         {
1369             /* Request line is now complete */
1370             const char *p = memchr(cl->p_buffer, ' ', cl->i_buffer);
1371             size_t len;
1372
1373             assert(cl->query.i_type == HTTPD_MSG_NONE);
1374
1375             if (!p) { /* no URI: evil guy */
1376                 i_len = 0; /* drop connection */
1377                 break;
1378             }
1379
1380             do
1381                 p++; /* skips extra spaces */
1382             while (*p == ' ');
1383
1384             p = memchr(p, ' ', ((char *)cl->p_buffer) + cl->i_buffer - p);
1385             if (!p) { /* no explicit protocol: HTTP/0.9 */
1386                 i_len = 0; /* not supported currently -> drop */
1387                 break;
1388             }
1389
1390             do
1391                 p++; /* skips extra spaces ever again */
1392             while (*p == ' ');
1393
1394             len = ((char *)cl->p_buffer) + cl->i_buffer - p;
1395             if (len < 7) /* foreign protocol */
1396                 i_len = 0; /* I don't understand -> drop */
1397             else if (!memcmp(p, "HTTP/1.", 7)) {
1398                 cl->query.i_proto = HTTPD_PROTO_HTTP;
1399                 cl->query.i_version = atoi(p + 7);
1400             } else if (!memcmp(p, "RTSP/1.", 7)) {
1401                 cl->query.i_proto = HTTPD_PROTO_RTSP;
1402                 cl->query.i_version = atoi(p + 7);
1403             } else if (!memcmp(p, "HTTP/", 5)) {
1404                 const uint8_t sorry[] =
1405                     "HTTP/1.1 505 Unknown HTTP version\r\n\r\n";
1406                 httpd_NetSend(cl, sorry, sizeof(sorry) - 1);
1407                 i_len = 0; /* drop */
1408             } else if (!memcmp(p, "RTSP/", 5)) {
1409                 const uint8_t sorry[] =
1410                     "RTSP/1.0 505 Unknown RTSP version\r\n\r\n";
1411                 httpd_NetSend(cl, sorry, sizeof(sorry) - 1);
1412                 i_len = 0; /* drop */
1413             } else /* yet another foreign protocol */
1414                 i_len = 0;
1415
1416             if (i_len == 0)
1417                 break;
1418         }
1419
1420         if ((cl->i_buffer >= 2 && !memcmp(&cl->p_buffer[cl->i_buffer-2], "\n\n", 2))||
1421                 (cl->i_buffer >= 4 && !memcmp(&cl->p_buffer[cl->i_buffer-4], "\r\n\r\n", 4)))
1422         {
1423             char *p;
1424
1425             /* we have finished the header so parse it and set i_body */
1426             cl->p_buffer[cl->i_buffer] = '\0';
1427
1428             if (cl->query.i_type == HTTPD_MSG_ANSWER) {
1429                 /* FIXME:
1430                  * assume strlen("HTTP/1.x") = 8
1431                  */
1432                 cl->query.i_status =
1433                     strtol((char *)&cl->p_buffer[8],
1434                             &p, 0);
1435                 while (*p == ' ')
1436                     p++;
1437             } else {
1438                 p = NULL;
1439                 cl->query.i_type = HTTPD_MSG_NONE;
1440
1441                 for (unsigned i = 0; msg_type[i].name[0]; i++)
1442                     if (!strncmp((char *)cl->p_buffer, msg_type[i].name,
1443                                 strlen(msg_type[i].name))) {
1444                         p = (char *)&cl->p_buffer[strlen(msg_type[i].name) + 1 ];
1445                         cl->query.i_type = msg_type[i].i_type;
1446                         if (cl->query.i_proto != msg_type[i].i_proto) {
1447                             p = NULL;
1448                             cl->query.i_proto = HTTPD_PROTO_NONE;
1449                             cl->query.i_type = HTTPD_MSG_NONE;
1450                         }
1451                         break;
1452                     }
1453
1454                 if (!p) {
1455                     if (strstr((char *)cl->p_buffer, "HTTP/1."))
1456                         cl->query.i_proto = HTTPD_PROTO_HTTP;
1457                     else if (strstr((char *)cl->p_buffer, "RTSP/1."))
1458                         cl->query.i_proto = HTTPD_PROTO_RTSP;
1459                 } else {
1460                     char *p2;
1461                     char *p3;
1462
1463                     while (*p == ' ')
1464                         p++;
1465
1466                     p2 = strchr(p, ' ');
1467                     if (p2)
1468                         *p2++ = '\0';
1469
1470                     if (!strncasecmp(p, (cl->query.i_proto == HTTPD_PROTO_HTTP) ? "http:" : "rtsp:", 5)) {
1471                         /* Skip hier-part of URL (if present) */
1472                         p += 5;
1473                         if (!strncmp(p, "//", 2)) { /* skip authority */
1474                             /* see RFC3986 §3.2 */
1475                             p += 2;
1476                             p += strcspn(p, "/?#");
1477                         }
1478                     }
1479                     else if (!strncasecmp(p, (cl->query.i_proto == HTTPD_PROTO_HTTP) ? "https:" : "rtsps:", 6)) {
1480                         /* Skip hier-part of URL (if present) */
1481                         p += 6;
1482                         if (!strncmp(p, "//", 2)) { /* skip authority */
1483                             /* see RFC3986 §3.2 */
1484                             p += 2;
1485                             p += strcspn(p, "/?#");
1486                         }
1487                     }
1488
1489                     cl->query.psz_url = strdup(p);
1490                     if ((p3 = strchr(cl->query.psz_url, '?')) ) {
1491                         *p3++ = '\0';
1492                         cl->query.psz_args = (uint8_t *)strdup(p3);
1493                     }
1494                     p = p2;
1495                 }
1496             }
1497             if (p)
1498                 p = strchr(p, '\n');
1499
1500             if (p) {
1501                 while (*p == '\n' || *p == '\r')
1502                     p++;
1503
1504                 while (p && *p) {
1505                     char *line = p;
1506                     char *eol = p = strchr(p, '\n');
1507                     char *colon;
1508
1509                     while (eol && eol >= line && (*eol == '\n' || *eol == '\r'))
1510                         *eol-- = '\0';
1511
1512                     if ((colon = strchr(line, ':'))) {
1513                         *colon++ = '\0';
1514                         while (*colon == ' ')
1515                             colon++;
1516                         httpd_MsgAdd(&cl->query, line, "%s", colon);
1517
1518                         if (!strcasecmp(line, "Content-Length"))
1519                             cl->query.i_body = atol(colon);
1520                     }
1521
1522                     if (p) {
1523                         p++;
1524                         while (*p == '\n' || *p == '\r')
1525                             p++;
1526                     }
1527                 }
1528             }
1529             if (cl->query.i_body > 0) {
1530                 /* TODO Mhh, handle the case where the client only
1531                  * sends a request and closes the connection to
1532                  * mark the end of the body (probably only RTSP) */
1533                 if (cl->query.i_body >= 65536)
1534                     cl->query.p_body = malloc(cl->query.i_body);
1535                 else
1536                     cl->query.p_body = NULL;
1537                 cl->i_buffer = 0;
1538                 if (!cl->query.p_body) {
1539                     switch (cl->query.i_proto) {
1540                         case HTTPD_PROTO_HTTP: {
1541                             const uint8_t sorry[] = "HTTP/1.1 413 Request Entity Too Large\r\n\r\n";
1542                             httpd_NetSend(cl, sorry, sizeof(sorry) - 1);
1543                             break;
1544                         }
1545                         case HTTPD_PROTO_RTSP: {
1546                             const uint8_t sorry[] = "RTSP/1.0 413 Request Entity Too Large\r\n\r\n";
1547                             httpd_NetSend(cl, sorry, sizeof(sorry) - 1);
1548                             break;
1549                         }
1550                         default:
1551                             vlc_assert_unreachable();
1552                     }
1553                     i_len = 0; /* drop */
1554                 }
1555                 break;
1556             } else
1557                 cl->i_state = HTTPD_CLIENT_RECEIVE_DONE;
1558         }
1559     }
1560
1561     /* check if the client is to be set to dead */
1562 #if defined(_WIN32)
1563     if ((i_len < 0 && WSAGetLastError() != WSAEWOULDBLOCK) || (i_len == 0))
1564 #else
1565     if ((i_len < 0 && errno != EAGAIN) || (i_len == 0))
1566 #endif
1567     {
1568         if (cl->query.i_proto != HTTPD_PROTO_NONE && cl->query.i_type != HTTPD_MSG_NONE) {
1569             /* connection closed -> end of data */
1570             if (cl->query.i_body > 0)
1571                 cl->query.i_body = cl->i_buffer;
1572             cl->i_state = HTTPD_CLIENT_RECEIVE_DONE;
1573         }
1574         else
1575             cl->i_state = HTTPD_CLIENT_DEAD;
1576     }
1577
1578     /* XXX: for QT I have to disable timeout. Try to find why */
1579     if (cl->query.i_proto == HTTPD_PROTO_RTSP)
1580         cl->i_activity_timeout = 0;
1581 }
1582
1583 static void httpd_ClientSend(httpd_client_t *cl)
1584 {
1585     int i_len;
1586
1587     if (cl->i_buffer < 0) {
1588         /* We need to create the header */
1589         int i_size = 0;
1590         char *p;
1591         const char *psz_status = httpd_ReasonFromCode(cl->answer.i_status);
1592
1593         i_size = strlen("HTTP/1.") + 10 + 10 + strlen(psz_status) + 5;
1594         for (size_t i = 0; i < cl->answer.i_headers; i++)
1595             i_size += strlen(cl->answer.p_headers[i].name) + 2 +
1596                       strlen(cl->answer.p_headers[i].value) + 2;
1597
1598         if (cl->i_buffer_size < i_size) {
1599             cl->i_buffer_size = i_size;
1600             free(cl->p_buffer);
1601             cl->p_buffer = xmalloc(i_size);
1602         }
1603         p = (char *)cl->p_buffer;
1604
1605         p += sprintf(p, "%s.%u %d %s\r\n",
1606                       cl->answer.i_proto ==  HTTPD_PROTO_HTTP ? "HTTP/1" : "RTSP/1",
1607                       cl->answer.i_version,
1608                       cl->answer.i_status, psz_status);
1609         for (size_t i = 0; i < cl->answer.i_headers; i++)
1610             p += sprintf(p, "%s: %s\r\n", cl->answer.p_headers[i].name,
1611                           cl->answer.p_headers[i].value);
1612         p += sprintf(p, "\r\n");
1613
1614         cl->i_buffer = 0;
1615         cl->i_buffer_size = (uint8_t*)p - cl->p_buffer;
1616     }
1617
1618     i_len = httpd_NetSend(cl, &cl->p_buffer[cl->i_buffer],
1619                            cl->i_buffer_size - cl->i_buffer);
1620     if (i_len >= 0) {
1621         cl->i_buffer += i_len;
1622
1623         if (cl->i_buffer >= cl->i_buffer_size) {
1624             if (cl->answer.i_body == 0  && cl->answer.i_body_offset > 0) {
1625                 /* catch more body data */
1626                 int     i_msg = cl->query.i_type;
1627                 int64_t i_offset = cl->answer.i_body_offset;
1628
1629                 httpd_MsgClean(&cl->answer);
1630                 cl->answer.i_body_offset = i_offset;
1631
1632                 cl->url->catch[i_msg].cb(cl->url->catch[i_msg].p_sys, cl,
1633                                           &cl->answer, &cl->query);
1634             }
1635
1636             if (cl->answer.i_body > 0) {
1637                 /* send the body data */
1638                 free(cl->p_buffer);
1639                 cl->p_buffer = cl->answer.p_body;
1640                 cl->i_buffer_size = cl->answer.i_body;
1641                 cl->i_buffer = 0;
1642
1643                 cl->answer.i_body = 0;
1644                 cl->answer.p_body = NULL;
1645             } else /* send finished */
1646                 cl->i_state = HTTPD_CLIENT_SEND_DONE;
1647         }
1648     } else {
1649 #if defined(_WIN32)
1650         if ((i_len < 0 && WSAGetLastError() != WSAEWOULDBLOCK) || (i_len == 0))
1651 #else
1652         if ((i_len < 0 && errno != EAGAIN) || (i_len == 0))
1653 #endif
1654         {
1655             /* error */
1656             cl->i_state = HTTPD_CLIENT_DEAD;
1657         }
1658     }
1659 }
1660
1661 static void httpd_ClientTlsHandshake(httpd_host_t *host, httpd_client_t *cl)
1662 {
1663     switch (vlc_tls_SessionHandshake(host->p_tls, cl->p_tls))
1664     {
1665         case -1: cl->i_state = HTTPD_CLIENT_DEAD;       break;
1666         case 0:  cl->i_state = HTTPD_CLIENT_RECEIVING;  break;
1667         case 1:  cl->i_state = HTTPD_CLIENT_TLS_HS_IN;  break;
1668         case 2:  cl->i_state = HTTPD_CLIENT_TLS_HS_OUT; break;
1669     }
1670 }
1671
1672 static bool httpdAuthOk(const char *user, const char *pass, const char *b64)
1673 {
1674     if (!*user && !*pass)
1675         return true;
1676
1677     if (!b64)
1678         return false;
1679
1680     if (strncasecmp(b64, "BASIC", 5))
1681         return false;
1682
1683     b64 += 5;
1684     while (*b64 == ' ')
1685         b64++;
1686
1687     char *given_user = vlc_b64_decode(b64);
1688     if (!given_user)
1689         return false;
1690
1691     char *given_pass = NULL;
1692     given_pass = strchr (given_user, ':');
1693     if (!given_pass)
1694         goto auth_failed;
1695
1696     *given_pass++ = '\0';
1697
1698     if (strcmp (given_user, user))
1699         goto auth_failed;
1700
1701     if (strcmp (given_pass, pass))
1702         goto auth_failed;
1703
1704     free(given_user);
1705     return true;
1706
1707 auth_failed:
1708     free(given_user);
1709     return false;
1710 }
1711
1712 static void httpdLoop(httpd_host_t *host)
1713 {
1714     struct pollfd ufd[host->nfd + host->i_client];
1715     unsigned nfd;
1716     for (nfd = 0; nfd < host->nfd; nfd++) {
1717         ufd[nfd].fd = host->fds[nfd];
1718         ufd[nfd].events = POLLIN;
1719         ufd[nfd].revents = 0;
1720     }
1721
1722     /* add all socket that should be read/write and close dead connection */
1723     while (host->i_url <= 0) {
1724         mutex_cleanup_push(&host->lock);
1725         vlc_cond_wait(&host->wait, &host->lock);
1726         vlc_cleanup_pop();
1727     }
1728
1729     mtime_t now = mdate();
1730     bool b_low_delay = false;
1731
1732     int canc = vlc_savecancel();
1733     for (int i_client = 0; i_client < host->i_client; i_client++) {
1734         int64_t i_offset;
1735         httpd_client_t *cl = host->client[i_client];
1736         if (cl->i_ref < 0 || (cl->i_ref == 0 &&
1737                     (cl->i_state == HTTPD_CLIENT_DEAD ||
1738                       (cl->i_activity_timeout > 0 &&
1739                         cl->i_activity_date+cl->i_activity_timeout < now)))) {
1740             TAB_REMOVE(host->i_client, host->client, cl);
1741             i_client--;
1742             httpd_ClientDestroy(cl);
1743             continue;
1744         }
1745
1746         struct pollfd *pufd = ufd + nfd;
1747         assert (pufd < ufd + (sizeof (ufd) / sizeof (ufd[0])));
1748
1749         pufd->fd = cl->fd;
1750         pufd->events = pufd->revents = 0;
1751
1752         switch (cl->i_state) {
1753             case HTTPD_CLIENT_RECEIVING:
1754             case HTTPD_CLIENT_TLS_HS_IN:
1755                 pufd->events = POLLIN;
1756                 break;
1757
1758             case HTTPD_CLIENT_SENDING:
1759             case HTTPD_CLIENT_TLS_HS_OUT:
1760                 pufd->events = POLLOUT;
1761                 break;
1762
1763             case HTTPD_CLIENT_RECEIVE_DONE: {
1764                 httpd_message_t *answer = &cl->answer;
1765                 httpd_message_t *query  = &cl->query;
1766
1767                 httpd_MsgInit(answer);
1768
1769                 /* Handle what we received */
1770                 switch (query->i_type) {
1771                     case HTTPD_MSG_ANSWER:
1772                         cl->url     = NULL;
1773                         cl->i_state = HTTPD_CLIENT_DEAD;
1774                         break;
1775
1776                     case HTTPD_MSG_OPTIONS:
1777                         answer->i_type   = HTTPD_MSG_ANSWER;
1778                         answer->i_proto  = query->i_proto;
1779                         answer->i_status = 200;
1780                         answer->i_body = 0;
1781                         answer->p_body = NULL;
1782
1783                         httpd_MsgAdd(answer, "Server", "VLC/%s", VERSION);
1784                         httpd_MsgAdd(answer, "Content-Length", "0");
1785
1786                         switch(query->i_proto) {
1787                         case HTTPD_PROTO_HTTP:
1788                             answer->i_version = 1;
1789                             httpd_MsgAdd(answer, "Allow", "GET,HEAD,POST,OPTIONS");
1790                             break;
1791
1792                         case HTTPD_PROTO_RTSP:
1793                             answer->i_version = 0;
1794
1795                             const char *p = httpd_MsgGet(query, "Cseq");
1796                             if (p)
1797                                 httpd_MsgAdd(answer, "Cseq", "%s", p);
1798                             p = httpd_MsgGet(query, "Timestamp");
1799                             if (p)
1800                                 httpd_MsgAdd(answer, "Timestamp", "%s", p);
1801
1802                             p = httpd_MsgGet(query, "Require");
1803                             if (p) {
1804                                 answer->i_status = 551;
1805                                 httpd_MsgAdd(query, "Unsupported", "%s", p);
1806                             }
1807
1808                             httpd_MsgAdd(answer, "Public", "DESCRIBE,SETUP,"
1809                                     "TEARDOWN,PLAY,PAUSE,GET_PARAMETER");
1810                             break;
1811                         }
1812
1813                         cl->i_buffer = -1;  /* Force the creation of the answer in
1814                                              * httpd_ClientSend */
1815                         cl->i_state = HTTPD_CLIENT_SENDING;
1816                         break;
1817
1818                     case HTTPD_MSG_NONE:
1819                         if (query->i_proto == HTTPD_PROTO_NONE) {
1820                             cl->url = NULL;
1821                             cl->i_state = HTTPD_CLIENT_DEAD;
1822                         } else {
1823                             /* unimplemented */
1824                             answer->i_proto  = query->i_proto ;
1825                             answer->i_type   = HTTPD_MSG_ANSWER;
1826                             answer->i_version= 0;
1827                             answer->i_status = 501;
1828
1829                             char *p;
1830                             answer->i_body = httpd_HtmlError (&p, 501, NULL);
1831                             answer->p_body = (uint8_t *)p;
1832                             httpd_MsgAdd(answer, "Content-Length", "%d", answer->i_body);
1833
1834                             cl->i_buffer = -1;  /* Force the creation of the answer in httpd_ClientSend */
1835                             cl->i_state = HTTPD_CLIENT_SENDING;
1836                         }
1837                         break;
1838
1839                     default: {
1840                         int i_msg = query->i_type;
1841                         bool b_auth_failed = false;
1842
1843                         /* Search the url and trigger callbacks */
1844                         for (int i = 0; i < host->i_url; i++) {
1845                             httpd_url_t *url = host->url[i];
1846
1847                             if (strcmp(url->psz_url, query->psz_url))
1848                                 continue;
1849                             if (!url->catch[i_msg].cb)
1850                                 continue;
1851
1852                             if (answer) {
1853                                 b_auth_failed = !httpdAuthOk(url->psz_user,
1854                                    url->psz_password,
1855                                    httpd_MsgGet(query, "Authorization")); /* BASIC id */
1856                                 if (b_auth_failed)
1857                                    break;
1858                             }
1859
1860                             if (url->catch[i_msg].cb(url->catch[i_msg].p_sys, cl, answer, query))
1861                                 continue;
1862
1863                             if (answer->i_proto == HTTPD_PROTO_NONE)
1864                                 cl->i_buffer = cl->i_buffer_size; /* Raw answer from a CGI */
1865                             else
1866                                 cl->i_buffer = -1;
1867
1868                             /* only one url can answer */
1869                             answer = NULL;
1870                             if (!cl->url)
1871                                 cl->url = url;
1872                         }
1873
1874                         if (answer) {
1875                             answer->i_proto  = query->i_proto;
1876                             answer->i_type   = HTTPD_MSG_ANSWER;
1877                             answer->i_version= 0;
1878
1879                            if (b_auth_failed) {
1880                                 httpd_MsgAdd(answer, "WWW-Authenticate",
1881                                         "Basic realm=\"VLC stream\"");
1882                                 answer->i_status = 401;
1883                             } else
1884                                 answer->i_status = 404; /* no url registered */
1885
1886                             char *p;
1887                             answer->i_body = httpd_HtmlError (&p, answer->i_status,
1888                                     query->psz_url);
1889                             answer->p_body = (uint8_t *)p;
1890
1891                             cl->i_buffer = -1;  /* Force the creation of the answer in httpd_ClientSend */
1892                             httpd_MsgAdd(answer, "Content-Length", "%d", answer->i_body);
1893                             httpd_MsgAdd(answer, "Content-Type", "%s", "text/html");
1894                         }
1895
1896                         cl->i_state = HTTPD_CLIENT_SENDING;
1897                     }
1898                 }
1899                 break;
1900             }
1901
1902             case HTTPD_CLIENT_SEND_DONE:
1903                 if (!cl->b_stream_mode || cl->answer.i_body_offset == 0) {
1904                     const char *psz_connection = httpd_MsgGet(&cl->answer, "Connection");
1905                     const char *psz_query = httpd_MsgGet(&cl->query, "Connection");
1906                     bool b_connection = false;
1907                     bool b_keepalive = false;
1908                     bool b_query = false;
1909
1910                     cl->url = NULL;
1911                     if (psz_connection) {
1912                         b_connection = (strcasecmp(psz_connection, "Close") == 0);
1913                         b_keepalive = (strcasecmp(psz_connection, "Keep-Alive") == 0);
1914                     }
1915
1916                     if (psz_query)
1917                         b_query = (strcasecmp(psz_query, "Close") == 0);
1918
1919                     if (((cl->query.i_proto == HTTPD_PROTO_HTTP) &&
1920                                 ((cl->query.i_version == 0 && b_keepalive) ||
1921                                   (cl->query.i_version == 1 && !b_connection))) ||
1922                             ((cl->query.i_proto == HTTPD_PROTO_RTSP) &&
1923                               !b_query && !b_connection)) {
1924                         httpd_MsgClean(&cl->query);
1925                         httpd_MsgInit(&cl->query);
1926
1927                         cl->i_buffer = 0;
1928                         cl->i_buffer_size = 1000;
1929                         free(cl->p_buffer);
1930                         cl->p_buffer = xmalloc(cl->i_buffer_size);
1931                         cl->i_state = HTTPD_CLIENT_RECEIVING;
1932                     } else
1933                         cl->i_state = HTTPD_CLIENT_DEAD;
1934                     httpd_MsgClean(&cl->answer);
1935                 } else {
1936                     i_offset = cl->answer.i_body_offset;
1937                     httpd_MsgClean(&cl->answer);
1938
1939                     cl->answer.i_body_offset = i_offset;
1940                     free(cl->p_buffer);
1941                     cl->p_buffer = NULL;
1942                     cl->i_buffer = 0;
1943                     cl->i_buffer_size = 0;
1944
1945                     cl->i_state = HTTPD_CLIENT_WAITING;
1946                 }
1947                 break;
1948
1949             case HTTPD_CLIENT_WAITING:
1950                 i_offset = cl->answer.i_body_offset;
1951                 int i_msg = cl->query.i_type;
1952
1953                 httpd_MsgInit(&cl->answer);
1954                 cl->answer.i_body_offset = i_offset;
1955
1956                 cl->url->catch[i_msg].cb(cl->url->catch[i_msg].p_sys, cl,
1957                         &cl->answer, &cl->query);
1958                 if (cl->answer.i_type != HTTPD_MSG_NONE) {
1959                     /* we have new data, so re-enter send mode */
1960                     cl->i_buffer      = 0;
1961                     cl->p_buffer      = cl->answer.p_body;
1962                     cl->i_buffer_size = cl->answer.i_body;
1963                     cl->answer.p_body = NULL;
1964                     cl->answer.i_body = 0;
1965                     cl->i_state = HTTPD_CLIENT_SENDING;
1966                 }
1967         }
1968
1969         if (pufd->events != 0)
1970             nfd++;
1971         else
1972             b_low_delay = true;
1973     }
1974     vlc_mutex_unlock(&host->lock);
1975     vlc_restorecancel(canc);
1976
1977     /* we will wait 20ms (not too big) if HTTPD_CLIENT_WAITING */
1978     int ret = poll(ufd, nfd, b_low_delay ? 20 : -1);
1979
1980     canc = vlc_savecancel();
1981     vlc_mutex_lock(&host->lock);
1982     switch(ret) {
1983         case -1:
1984             if (errno != EINTR) {
1985                 /* Kernel on low memory or a bug: pace */
1986                 msg_Err(host, "polling error: %s", vlc_strerror_c(errno));
1987                 msleep(100000);
1988             }
1989         case 0:
1990             vlc_restorecancel(canc);
1991             return;
1992     }
1993
1994     /* Handle client sockets */
1995     now = mdate();
1996     nfd = host->nfd;
1997
1998     for (int i_client = 0; i_client < host->i_client; i_client++) {
1999         httpd_client_t *cl = host->client[i_client];
2000         const struct pollfd *pufd = &ufd[nfd];
2001
2002         assert(pufd < &ufd[sizeof(ufd) / sizeof(ufd[0])]);
2003
2004         if (cl->fd != pufd->fd)
2005             continue; // we were not waiting for this client
2006         ++nfd;
2007         if (pufd->revents == 0)
2008             continue; // no event received
2009
2010         cl->i_activity_date = now;
2011
2012         switch (cl->i_state) {
2013             case HTTPD_CLIENT_RECEIVING: httpd_ClientRecv(cl); break;
2014             case HTTPD_CLIENT_SENDING:   httpd_ClientSend(cl); break;
2015             case HTTPD_CLIENT_TLS_HS_IN:
2016             case HTTPD_CLIENT_TLS_HS_OUT:
2017                 httpd_ClientTlsHandshake(host, cl);
2018                 break;
2019         }
2020     }
2021
2022     /* Handle server sockets (accept new connections) */
2023     for (nfd = 0; nfd < host->nfd; nfd++) {
2024         httpd_client_t *cl;
2025         int fd = ufd[nfd].fd;
2026
2027         assert (fd == host->fds[nfd]);
2028
2029         if (ufd[nfd].revents == 0)
2030             continue;
2031
2032         /* */
2033         fd = vlc_accept (fd, NULL, NULL, true);
2034         if (fd == -1)
2035             continue;
2036         setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
2037                 &(int){ 1 }, sizeof(int));
2038
2039         vlc_tls_t *p_tls;
2040
2041         if (host->p_tls != NULL)
2042         {
2043             const char *alpn[] = { "http/1.1", NULL };
2044
2045             p_tls = vlc_tls_ServerSessionCreate(host->p_tls, fd, alpn);
2046         }
2047         else
2048             p_tls = NULL;
2049
2050         cl = httpd_ClientNew(fd, p_tls, now);
2051
2052         TAB_APPEND(host->i_client, host->client, cl);
2053     }
2054
2055     vlc_restorecancel(canc);
2056 }
2057
2058 static void* httpd_HostThread(void *data)
2059 {
2060     httpd_host_t *host = data;
2061
2062     vlc_mutex_lock(&host->lock);
2063     while (host->i_ref > 0)
2064         httpdLoop(host);
2065     vlc_mutex_unlock(&host->lock);
2066     return NULL;
2067 }
2068
2069 int httpd_StreamSetHTTPHeaders(httpd_stream_t * p_stream, httpd_header * p_headers, size_t i_headers)
2070 {
2071     if (!p_stream)
2072         return VLC_EGENERIC;
2073
2074     vlc_mutex_lock(&p_stream->lock);
2075     if (p_stream->p_http_headers) {
2076         for (size_t i = 0; i < p_stream->i_http_headers; i++) {
2077             free(p_stream->p_http_headers[i].name);
2078             free(p_stream->p_http_headers[i].value);
2079         }
2080         free(p_stream->p_http_headers);
2081         p_stream->p_http_headers = NULL;
2082         p_stream->i_http_headers = 0;
2083     }
2084
2085     if (!p_headers || !i_headers) {
2086         vlc_mutex_unlock(&p_stream->lock);
2087         return VLC_SUCCESS;
2088     }
2089
2090     p_stream->p_http_headers = malloc(sizeof(httpd_header) * i_headers);
2091     if (!p_stream->p_http_headers) {
2092         vlc_mutex_unlock(&p_stream->lock);
2093         return VLC_ENOMEM;
2094     }
2095
2096     size_t j = 0;
2097     for (size_t i = 0; i < i_headers; i++) {
2098         if (unlikely(!p_headers[i].name || !p_headers[i].value))
2099             continue;
2100
2101         p_stream->p_http_headers[j].name = strdup(p_headers[i].name);
2102         p_stream->p_http_headers[j].value = strdup(p_headers[i].value);
2103
2104         if (unlikely(!p_stream->p_http_headers[j].name ||
2105                       !p_stream->p_http_headers[j].value)) {
2106             free(p_stream->p_http_headers[j].name);
2107             free(p_stream->p_http_headers[j].value);
2108             break;
2109         }
2110         j++;
2111     }
2112     p_stream->i_http_headers = j;
2113     vlc_mutex_unlock(&p_stream->lock);
2114     return VLC_SUCCESS;
2115 }