main/http.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2006, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*!
  20  * \file
  21  * \brief http server for AMI access
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  *
  25  * This program implements a tiny http server
  26  * and was inspired by micro-httpd by Jef Poskanzer
  27  *
  28  * GMime http://spruce.sourceforge.net/gmime/
  29  *
  30  * \ref AstHTTP - AMI over the http protocol
  31  */
  32
  33 /*! \li \ref http.c uses the configuration file \ref http.conf
  34  * \addtogroup configuration_file
  35  */
  36
  37 /*! \page http.conf http.conf
  38  * \verbinclude http.conf.sample
  39  */
  40
  41 /*** MODULEINFO
  42         <support_level>core</support_level>
  43  ***/
  44
  45 #include "asterisk.h"
  46
  47 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  48
  49 #include <time.h>
  50 #include <sys/time.h>
  51 #include <sys/stat.h>
  52 #include <sys/signal.h>
  53 #include <fcntl.h>
  54
  55 #include "asterisk/paths.h"     /* use ast_config_AST_DATA_DIR */
  56 #include "asterisk/cli.h"
  57 #include "asterisk/tcptls.h"
  58 #include "asterisk/http.h"
  59 #include "asterisk/utils.h"
  60 #include "asterisk/strings.h"
  61 #include "asterisk/config.h"
  62 #include "asterisk/stringfields.h"
  63 #include "asterisk/ast_version.h"
  64 #include "asterisk/manager.h"
  65 #include "asterisk/_private.h"
  66 #include "asterisk/astobj2.h"
  67 #include "asterisk/netsock2.h"
  68 #include "asterisk/json.h"
  69
  70 #define MAX_PREFIX 80
  71 #define DEFAULT_PORT 8088
  72 #define DEFAULT_TLS_PORT 8089
  73 #define DEFAULT_SESSION_LIMIT 100
  74
  75 /* See http.h for more information about the SSL implementation */
  76 #if defined(HAVE_OPENSSL) && (defined(HAVE_FUNOPEN) || defined(HAVE_FOPENCOOKIE))
  77 #define DO_SSL  /* comment in/out if you want to support ssl */
  78 #endif
  79
  80 static int session_limit = DEFAULT_SESSION_LIMIT;
  81 static int session_count = 0;
  82
  83 static struct ast_tls_config http_tls_cfg;
  84
  85 static void *httpd_helper_thread(void *arg);
  86
  87 /*!
  88  * we have up to two accepting threads, one for http, one for https
  89  */
  90 static struct ast_tcptls_session_args http_desc = {
  91         .accept_fd = -1,
  92         .master = AST_PTHREADT_NULL,
  93         .tls_cfg = NULL,
  94         .poll_timeout = -1,
  95         .name = "http server",
  96         .accept_fn = ast_tcptls_server_root,
  97         .worker_fn = httpd_helper_thread,
  98 };
  99
 100 static struct ast_tcptls_session_args https_desc = {
 101         .accept_fd = -1,
 102         .master = AST_PTHREADT_NULL,
 103         .tls_cfg = &http_tls_cfg,
 104         .poll_timeout = -1,
 105         .name = "https server",
 106         .accept_fn = ast_tcptls_server_root,
 107         .worker_fn = httpd_helper_thread,
 108 };
 109
 110 static AST_RWLIST_HEAD_STATIC(uris, ast_http_uri);      /*!< list of supported handlers */
 111
 112 /* all valid URIs must be prepended by the string in prefix. */
 113 static char prefix[MAX_PREFIX];
 114 static int enablestatic;
 115
 116 /*! \brief Limit the kinds of files we're willing to serve up */
 117 static struct {
 118         const char *ext;
 119         const char *mtype;
 120 } mimetypes[] = {
 121         { "png", "image/png" },
 122         { "xml", "text/xml" },
 123         { "jpg", "image/jpeg" },
 124         { "js", "application/x-javascript" },
 125         { "wav", "audio/x-wav" },
 126         { "mp3", "audio/mpeg" },
 127         { "svg", "image/svg+xml" },
 128         { "svgz", "image/svg+xml" },
 129         { "gif", "image/gif" },
 130         { "html", "text/html" },
 131         { "htm", "text/html" },
 132         { "css", "text/css" },
 133         { "cnf", "text/plain" },
 134         { "cfg", "text/plain" },
 135         { "bin", "application/octet-stream" },
 136         { "sbn", "application/octet-stream" },
 137         { "ld", "application/octet-stream" },
 138 };
 139
 140 struct http_uri_redirect {
 141         AST_LIST_ENTRY(http_uri_redirect) entry;
 142         char *dest;
 143         char target[0];
 144 };
 145
 146 static AST_RWLIST_HEAD_STATIC(uri_redirects, http_uri_redirect);
 147
 148 static const struct ast_cfhttp_methods_text {
 149         enum ast_http_method method;
 150         const char *text;
 151 } ast_http_methods_text[] = {
 152         { AST_HTTP_UNKNOWN,     "UNKNOWN" },
 153         { AST_HTTP_GET,         "GET" },
 154         { AST_HTTP_POST,        "POST" },
 155         { AST_HTTP_HEAD,        "HEAD" },
 156         { AST_HTTP_PUT,         "PUT" },
 157         { AST_HTTP_DELETE,      "DELETE" },
 158         { AST_HTTP_OPTIONS,     "OPTIONS" },
 159 };
 160
 161 const char *ast_get_http_method(enum ast_http_method method)
 162 {
 163         int x;
 164
 165         for (x = 0; x < ARRAY_LEN(ast_http_methods_text); x++) {
 166                 if (ast_http_methods_text[x].method == method) {
 167                         return ast_http_methods_text[x].text;
 168                 }
 169         }
 170
 171         return NULL;
 172 }
 173
 174 const char *ast_http_ftype2mtype(const char *ftype)
 175 {
 176         int x;
 177
 178         if (ftype) {
 179                 for (x = 0; x < ARRAY_LEN(mimetypes); x++) {
 180                         if (!strcasecmp(ftype, mimetypes[x].ext)) {
 181                                 return mimetypes[x].mtype;
 182                         }
 183                 }
 184         }
 185         return NULL;
 186 }
 187
 188 uint32_t ast_http_manid_from_vars(struct ast_variable *headers)
 189 {
 190         uint32_t mngid = 0;
 191         struct ast_variable *v, *cookies;
 192
 193         cookies = ast_http_get_cookies(headers);
 194         for (v = cookies; v; v = v->next) {
 195                 if (!strcasecmp(v->name, "mansession_id")) {
 196                         sscanf(v->value, "%30x", &mngid);
 197                         break;
 198                 }
 199         }
 200         if (cookies) {
 201                 ast_variables_destroy(cookies);
 202         }
 203         return mngid;
 204 }
 205
 206 void ast_http_prefix(char *buf, int len)
 207 {
 208         if (buf) {
 209                 ast_copy_string(buf, prefix, len);
 210         }
 211 }
 212
 213 static int static_callback(struct ast_tcptls_session_instance *ser,
 214         const struct ast_http_uri *urih, const char *uri,
 215         enum ast_http_method method, struct ast_variable *get_vars,
 216         struct ast_variable *headers)
 217 {
 218         char *path;
 219         const char *ftype;
 220         const char *mtype;
 221         char wkspace[80];
 222         struct stat st;
 223         int len;
 224         int fd;
 225         struct ast_str *http_header;
 226         struct timeval tv;
 227         struct ast_tm tm;
 228         char timebuf[80], etag[23];
 229         struct ast_variable *v;
 230         int not_modified = 0;
 231
 232         if (method != AST_HTTP_GET && method != AST_HTTP_HEAD) {
 233                 ast_http_error(ser, 501, "Not Implemented", "Attempt to use unimplemented / unsupported method");
 234                 return -1;
 235         }
 236
 237         /* Yuck.  I'm not really sold on this, but if you don't deliver static content it makes your configuration
 238            substantially more challenging, but this seems like a rather irritating feature creep on Asterisk. */
 239         if (!enablestatic || ast_strlen_zero(uri)) {
 240                 goto out403;
 241         }
 242
 243         /* Disallow any funny filenames at all (checking first character only??) */
 244         if ((uri[0] < 33) || strchr("./|~@#$%^&*() \t", uri[0])) {
 245                 goto out403;
 246         }
 247
 248         if (strstr(uri, "/..")) {
 249                 goto out403;
 250         }
 251
 252         if ((ftype = strrchr(uri, '.'))) {
 253                 ftype++;
 254         }
 255
 256         if (!(mtype = ast_http_ftype2mtype(ftype))) {
 257                 snprintf(wkspace, sizeof(wkspace), "text/%s", S_OR(ftype, "plain"));
 258                 mtype = wkspace;
 259         }
 260
 261         /* Cap maximum length */
 262         if ((len = strlen(uri) + strlen(ast_config_AST_DATA_DIR) + strlen("/static-http/") + 5) > 1024) {
 263                 goto out403;
 264         }
 265
 266         path = ast_alloca(len);
 267         sprintf(path, "%s/static-http/%s", ast_config_AST_DATA_DIR, uri);
 268         if (stat(path, &st)) {
 269                 goto out404;
 270         }
 271
 272         if (S_ISDIR(st.st_mode)) {
 273                 goto out404;
 274         }
 275
 276         if (strstr(path, "/private/") && !astman_is_authed(ast_http_manid_from_vars(headers))) {
 277                 goto out403;
 278         }
 279
 280         fd = open(path, O_RDONLY);
 281         if (fd < 0) {
 282                 goto out403;
 283         }
 284
 285         /* make "Etag:" http header value */
 286         snprintf(etag, sizeof(etag), "\"%ld\"", (long)st.st_mtime);
 287
 288         /* make "Last-Modified:" http header value */
 289         tv.tv_sec = st.st_mtime;
 290         tv.tv_usec = 0;
 291         ast_strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S GMT", ast_localtime(&tv, &tm, "GMT"));
 292
 293         /* check received "If-None-Match" request header and Etag value for file */
 294         for (v = headers; v; v = v->next) {
 295                 if (!strcasecmp(v->name, "If-None-Match")) {
 296                         if (!strcasecmp(v->value, etag)) {
 297                                 not_modified = 1;
 298                         }
 299                         break;
 300                 }
 301         }
 302
 303         if ( (http_header = ast_str_create(255)) == NULL) {
 304                 close(fd);
 305                 return -1;
 306         }
 307
 308         ast_str_set(&http_header, 0, "Content-type: %s\r\n"
 309                 "ETag: %s\r\n"
 310                 "Last-Modified: %s\r\n",
 311                 mtype,
 312                 etag,
 313                 timebuf);
 314
 315         /* ast_http_send() frees http_header, so we don't need to do it before returning */
 316         if (not_modified) {
 317                 ast_http_send(ser, method, 304, "Not Modified", http_header, NULL, 0, 1);
 318         } else {
 319                 ast_http_send(ser, method, 200, NULL, http_header, NULL, fd, 1); /* static content flag is set */
 320         }
 321         close(fd);
 322         return 0;
 323
 324 out404:
 325         ast_http_error(ser, 404, "Not Found", "The requested URL was not found on this server.");
 326         return -1;
 327
 328 out403:
 329         ast_http_error(ser, 403, "Access Denied", "You do not have permission to access the requested URL.");
 330         return -1;
 331 }
 332
 333 static int httpstatus_callback(struct ast_tcptls_session_instance *ser,
 334         const struct ast_http_uri *urih, const char *uri,
 335         enum ast_http_method method, struct ast_variable *get_vars,
 336         struct ast_variable *headers)
 337 {
 338         struct ast_str *out;
 339         struct ast_variable *v, *cookies = NULL;
 340
 341         if (method != AST_HTTP_GET && method != AST_HTTP_HEAD) {
 342                 ast_http_error(ser, 501, "Not Implemented", "Attempt to use unimplemented / unsupported method");
 343                 return -1;
 344         }
 345
 346         if ( (out = ast_str_create(512)) == NULL) {
 347                 return -1;
 348         }
 349
 350         ast_str_append(&out, 0,
 351                 "<title>Asterisk HTTP Status</title>\r\n"
 352                 "<body bgcolor=\"#ffffff\">\r\n"
 353                 "<table bgcolor=\"#f1f1f1\" align=\"center\"><tr><td bgcolor=\"#e0e0ff\" colspan=\"2\" width=\"500\">\r\n"
 354                 "<h2>&nbsp;&nbsp;Asterisk&trade; HTTP Status</h2></td></tr>\r\n");
 355
 356         ast_str_append(&out, 0, "<tr><td><i>Prefix</i></td><td><b>%s</b></td></tr>\r\n", prefix);
 357         ast_str_append(&out, 0, "<tr><td><i>Bind Address</i></td><td><b>%s</b></td></tr>\r\n",
 358                        ast_sockaddr_stringify_addr(&http_desc.old_address));
 359         ast_str_append(&out, 0, "<tr><td><i>Bind Port</i></td><td><b>%s</b></td></tr>\r\n",
 360                        ast_sockaddr_stringify_port(&http_desc.old_address));
 361         if (http_tls_cfg.enabled) {
 362                 ast_str_append(&out, 0, "<tr><td><i>SSL Bind Port</i></td><td><b>%s</b></td></tr>\r\n",
 363                                ast_sockaddr_stringify_port(&https_desc.old_address));
 364         }
 365         ast_str_append(&out, 0, "<tr><td colspan=\"2\"><hr></td></tr>\r\n");
 366         for (v = get_vars; v; v = v->next) {
 367                 ast_str_append(&out, 0, "<tr><td><i>Submitted GET Variable '%s'</i></td><td>%s</td></tr>\r\n", v->name, v->value);
 368         }
 369         ast_str_append(&out, 0, "<tr><td colspan=\"2\"><hr></td></tr>\r\n");
 370
 371         cookies = ast_http_get_cookies(headers);
 372         for (v = cookies; v; v = v->next) {
 373                 ast_str_append(&out, 0, "<tr><td><i>Cookie '%s'</i></td><td>%s</td></tr>\r\n", v->name, v->value);
 374         }
 375         ast_variables_destroy(cookies);
 376
 377         ast_str_append(&out, 0, "</table><center><font size=\"-1\"><i>Asterisk and Digium are registered trademarks of Digium, Inc.</i></font></center></body>\r\n");
 378         ast_http_send(ser, method, 200, NULL, NULL, out, 0, 0);
 379         return 0;
 380 }
 381
 382 static struct ast_http_uri statusuri = {
 383         .callback = httpstatus_callback,
 384         .description = "Asterisk HTTP General Status",
 385         .uri = "httpstatus",
 386         .has_subtree = 0,
 387         .data = NULL,
 388         .key = __FILE__,
 389 };
 390
 391 static struct ast_http_uri staticuri = {
 392         .callback = static_callback,
 393         .description = "Asterisk HTTP Static Delivery",
 394         .uri = "static",
 395         .has_subtree = 1,
 396         .data = NULL,
 397         .key= __FILE__,
 398 };
 399
 400
 401 /* send http/1.1 response */
 402 /* free content variable and close socket*/
 403 void ast_http_send(struct ast_tcptls_session_instance *ser,
 404         enum ast_http_method method, int status_code, const char *status_title,
 405         struct ast_str *http_header, struct ast_str *out, const int fd,
 406         unsigned int static_content)
 407 {
 408         struct timeval now = ast_tvnow();
 409         struct ast_tm tm;
 410         char timebuf[80];
 411         int content_length = 0;
 412
 413         if (!ser || 0 == ser->f) {
 414                 return;
 415         }
 416
 417         ast_strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S GMT", ast_localtime(&now, &tm, "GMT"));
 418
 419         /* calc content length */
 420         if (out) {
 421                 content_length += strlen(ast_str_buffer(out));
 422         }
 423
 424         if (fd) {
 425                 content_length += lseek(fd, 0, SEEK_END);
 426                 lseek(fd, 0, SEEK_SET);
 427         }
 428
 429         /* send http header */
 430         fprintf(ser->f, "HTTP/1.1 %d %s\r\n"
 431                 "Server: Asterisk/%s\r\n"
 432                 "Date: %s\r\n"
 433                 "Connection: close\r\n"
 434                 "%s"
 435                 "Content-Length: %d\r\n"
 436                 "%s"
 437                 "\r\n",
 438                 status_code, status_title ? status_title : "OK",
 439                 ast_get_version(),
 440                 timebuf,
 441                 static_content ? "" : "Cache-Control: no-cache, no-store\r\n",
 442                 content_length,
 443                 http_header ? ast_str_buffer(http_header) : ""
 444                 );
 445
 446         /* send content */
 447         if (method != AST_HTTP_HEAD || status_code >= 400) {
 448                 if (out) {
 449                         fprintf(ser->f, "%s", ast_str_buffer(out));
 450                 }
 451
 452                 if (fd) {
 453                         char buf[256];
 454                         int len;
 455                         while ((len = read(fd, buf, sizeof(buf))) > 0) {
 456                                 if (fwrite(buf, len, 1, ser->f) != 1) {
 457                                         ast_log(LOG_WARNING, "fwrite() failed: %s\n", strerror(errno));
 458                                         break;
 459                                 }
 460                         }
 461                 }
 462         }
 463
 464         if (http_header) {
 465                 ast_free(http_header);
 466         }
 467         if (out) {
 468                 ast_free(out);
 469         }
 470
 471         fclose(ser->f);
 472         ser->f = 0;
 473         return;
 474 }
 475
 476 /* Send http "401 Unauthorized" responce and close socket*/
 477 void ast_http_auth(struct ast_tcptls_session_instance *ser, const char *realm,
 478         const unsigned long nonce, const unsigned long opaque, int stale,
 479         const char *text)
 480 {
 481         struct ast_str *http_headers = ast_str_create(128);
 482         struct ast_str *out = ast_str_create(512);
 483
 484         if (!http_headers || !out) {
 485                 ast_free(http_headers);
 486                 ast_free(out);
 487                 return;
 488         }
 489
 490         ast_str_set(&http_headers, 0,
 491                 "WWW-authenticate: Digest algorithm=MD5, realm=\"%s\", nonce=\"%08lx\", qop=\"auth\", opaque=\"%08lx\"%s\r\n"
 492                 "Content-type: text/html\r\n",
 493                 realm ? realm : "Asterisk",
 494                 nonce,
 495                 opaque,
 496                 stale ? ", stale=true" : "");
 497
 498         ast_str_set(&out, 0,
 499                 "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n"
 500                 "<html><head>\r\n"
 501                 "<title>401 Unauthorized</title>\r\n"
 502                 "</head><body>\r\n"
 503                 "<h1>401 Unauthorized</h1>\r\n"
 504                 "<p>%s</p>\r\n"
 505                 "<hr />\r\n"
 506                 "<address>Asterisk Server</address>\r\n"
 507                 "</body></html>\r\n",
 508                 text ? text : "");
 509
 510         ast_http_send(ser, AST_HTTP_UNKNOWN, 401, "Unauthorized", http_headers, out, 0, 0);
 511         return;
 512 }
 513
 514 /* send http error response and close socket*/
 515 void ast_http_error(struct ast_tcptls_session_instance *ser, int status_code, const char *status_title, const char *text)
 516 {
 517         struct ast_str *http_headers = ast_str_create(40);
 518         struct ast_str *out = ast_str_create(256);
 519
 520         if (!http_headers || !out) {
 521                 ast_free(http_headers);
 522                 ast_free(out);
 523                 return;
 524         }
 525
 526         ast_str_set(&http_headers, 0, "Content-type: text/html\r\n");
 527
 528         ast_str_set(&out, 0,
 529                 "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n"
 530                 "<html><head>\r\n"
 531                 "<title>%d %s</title>\r\n"
 532                 "</head><body>\r\n"
 533                 "<h1>%s</h1>\r\n"
 534                 "<p>%s</p>\r\n"
 535                 "<hr />\r\n"
 536                 "<address>Asterisk Server</address>\r\n"
 537                 "</body></html>\r\n",
 538                         status_code, status_title, status_title, text);
 539
 540         ast_http_send(ser, AST_HTTP_UNKNOWN, status_code, status_title, http_headers, out, 0, 0);
 541         return;
 542 }
 543
 544 /*! \brief
 545  * Link the new uri into the list.
 546  *
 547  * They are sorted by length of
 548  * the string, not alphabetically. Duplicate entries are not replaced,
 549  * but the insertion order (using <= and not just <) makes sure that
 550  * more recent insertions hide older ones.
 551  * On a lookup, we just scan the list and stop at the first matching entry.
 552  */
 553 int ast_http_uri_link(struct ast_http_uri *urih)
 554 {
 555         struct ast_http_uri *uri;
 556         int len = strlen(urih->uri);
 557
 558         AST_RWLIST_WRLOCK(&uris);
 559
 560         if ( AST_RWLIST_EMPTY(&uris) || strlen(AST_RWLIST_FIRST(&uris)->uri) <= len ) {
 561                 AST_RWLIST_INSERT_HEAD(&uris, urih, entry);
 562                 AST_RWLIST_UNLOCK(&uris);
 563                 return 0;
 564         }
 565
 566         AST_RWLIST_TRAVERSE(&uris, uri, entry) {
 567                 if (AST_RWLIST_NEXT(uri, entry) &&
 568                         strlen(AST_RWLIST_NEXT(uri, entry)->uri) <= len) {
 569                         AST_RWLIST_INSERT_AFTER(&uris, uri, urih, entry);
 570                         AST_RWLIST_UNLOCK(&uris);
 571
 572                         return 0;
 573                 }
 574         }
 575
 576         AST_RWLIST_INSERT_TAIL(&uris, urih, entry);
 577
 578         AST_RWLIST_UNLOCK(&uris);
 579
 580         return 0;
 581 }
 582
 583 void ast_http_uri_unlink(struct ast_http_uri *urih)
 584 {
 585         AST_RWLIST_WRLOCK(&uris);
 586         AST_RWLIST_REMOVE(&uris, urih, entry);
 587         AST_RWLIST_UNLOCK(&uris);
 588 }
 589
 590 void ast_http_uri_unlink_all_with_key(const char *key)
 591 {
 592         struct ast_http_uri *urih;
 593         AST_RWLIST_WRLOCK(&uris);
 594         AST_RWLIST_TRAVERSE_SAFE_BEGIN(&uris, urih, entry) {
 595                 if (!strcmp(urih->key, key)) {
 596                         AST_RWLIST_REMOVE_CURRENT(entry);
 597                         if (urih->dmallocd) {
 598                                 ast_free(urih->data);
 599                         }
 600                         if (urih->mallocd) {
 601                                 ast_free(urih);
 602                         }
 603                 }
 604         }
 605         AST_RWLIST_TRAVERSE_SAFE_END;
 606         AST_RWLIST_UNLOCK(&uris);
 607 }
 608
 609 #define MAX_POST_CONTENT 1025
 610
 611 /*!
 612  * \brief Retrieves the header with the given field name.
 613  *
 614  * \param headers Headers to search.
 615  * \param field_name Name of the header to find.
 616  * \return Associated header value.
 617  * \return \c NULL if header is not present.
 618  */
 619 static const char *get_header(struct ast_variable *headers,
 620         const char *field_name)
 621 {
 622         struct ast_variable *v;
 623
 624         for (v = headers; v; v = v->next) {
 625                 if (!strcasecmp(v->name, field_name)) {
 626                         return v->value;
 627                 }
 628         }
 629         return NULL;
 630 }
 631
 632 /*!
 633  * \brief Retrieves the content type specified in the "Content-Type" header.
 634  *
 635  * This function only returns the "type/subtype" and any trailing parameter is
 636  * not included.
 637  *
 638  * \note the return value is an allocated string that needs to be freed.
 639  *
 640  * \retval the content type/subtype or NULL if the header is not found.
 641  */
 642 static char *get_content_type(struct ast_variable *headers)
 643 {
 644         const char *content_type = get_header(headers, "Content-Type");
 645         const char *param;
 646         size_t size;
 647
 648         if (!content_type) {
 649                 return NULL;
 650         }
 651
 652         param = strchr(content_type, ';');
 653         size = param ? param - content_type : strlen(content_type);
 654
 655         return ast_strndup(content_type, size);
 656 }
 657
 658 /*!
 659  * \brief Returns the value of the Content-Length header.
 660  *
 661  * \param headers HTTP headers.
 662  * \return Value of the Content-Length header.
 663  * \return 0 if header is not present, or is invalid.
 664  */
 665 static int get_content_length(struct ast_variable *headers)
 666 {
 667         const char *content_length = get_header(headers, "Content-Length");
 668
 669         if (!content_length) {
 670                 /* Missing content length; assume zero */
 671                 return 0;
 672         }
 673
 674         /* atoi() will return 0 for invalid inputs, which is good enough for
 675          * the HTTP parsing. */
 676         return atoi(content_length);
 677 }
 678
 679 /*!
 680  * \brief Returns the value of the Transfer-Encoding header.
 681  *
 682  * \param headers HTTP headers.
 683  * \return Value of the Transfer-Encoding header.
 684  * \return 0 if header is not present, or is invalid.
 685  */
 686 static const char *get_transfer_encoding(struct ast_variable *headers)
 687 {
 688         return get_header(headers, "Transfer-Encoding");
 689 }
 690
 691 struct ast_json *ast_http_get_json(
 692         struct ast_tcptls_session_instance *ser, struct ast_variable *headers)
 693 {
 694         int content_length = 0;
 695         int res;
 696         struct ast_json *body;
 697         RAII_VAR(char *, buf, NULL, ast_free);
 698         RAII_VAR(char *, type, get_content_type(headers), ast_free);
 699
 700         /* Use errno to distinguish errors from no body */
 701         errno = 0;
 702
 703         if (ast_strlen_zero(type) || strcasecmp(type, "application/json")) {
 704                 /* Content type is not JSON */
 705                 return NULL;
 706         }
 707
 708         content_length = get_content_length(headers);
 709
 710         if (content_length <= 0) {
 711                 /* No content (or streaming content). */
 712                 return NULL;
 713         }
 714
 715         if (content_length > MAX_POST_CONTENT - 1) {
 716                 ast_log(LOG_WARNING,
 717                         "Excessively long HTTP content. (%d > %d)\n",
 718                         content_length, MAX_POST_CONTENT);
 719                 errno = EFBIG;
 720                 return NULL;
 721         }
 722
 723         buf = ast_malloc(content_length);
 724         if (!buf) {
 725                 /* Malloc sets ENOMEM */
 726                 return NULL;
 727         }
 728
 729         res = fread(buf, 1, content_length, ser->f);
 730         if (res < content_length) {
 731                 /* Error, distinguishable by ferror() or feof(), but neither
 732                  * is good. Treat either one as I/O error */
 733                 ast_log(LOG_WARNING, "Short HTTP request body (%d < %d)\n",
 734                         res, content_length);
 735                 errno = EIO;
 736                 return NULL;
 737         }
 738
 739         body = ast_json_load_buf(buf, content_length, NULL);
 740         if (body == NULL) {
 741                 /* Failed to parse JSON; treat as an I/O error */
 742                 errno = EIO;
 743                 return NULL;
 744         }
 745
 746         return body;
 747 }
 748
 749 /*
 750  * get post variables from client Request Entity-Body, if content type is
 751  * application/x-www-form-urlencoded
 752  */
 753 struct ast_variable *ast_http_get_post_vars(
 754         struct ast_tcptls_session_instance *ser, struct ast_variable *headers)
 755 {
 756         int content_length = 0;
 757         struct ast_variable *v, *post_vars=NULL, *prev = NULL;
 758         char *var, *val;
 759         RAII_VAR(char *, buf, NULL, ast_free_ptr);
 760         RAII_VAR(char *, type, get_content_type(headers), ast_free);
 761         int res;
 762
 763         /* Use errno to distinguish errors from no params */
 764         errno = 0;
 765
 766         if (ast_strlen_zero(type) ||
 767             strcasecmp(type, "application/x-www-form-urlencoded")) {
 768                 /* Content type is not form data */
 769                 return NULL;
 770         }
 771
 772         content_length = get_content_length(headers);
 773
 774         if (content_length <= 0) {
 775                 return NULL;
 776         }
 777
 778         if (content_length > MAX_POST_CONTENT - 1) {
 779                 ast_log(LOG_WARNING,
 780                         "Excessively long HTTP content. (%d > %d)\n",
 781                         content_length, MAX_POST_CONTENT);
 782                 errno = EFBIG;
 783                 return NULL;
 784         }
 785
 786         buf = ast_malloc(content_length + 1);
 787         if (!buf) {
 788                 /* malloc sets errno to ENOMEM */
 789                 return NULL;
 790         }
 791
 792         res = fread(buf, 1, content_length, ser->f);
 793         if (res < content_length) {
 794                 /* Error, distinguishable by ferror() or feof(), but neither
 795                  * is good. Treat either one as I/O error */
 796                 errno = EIO;
 797                 return NULL;
 798         }
 799         buf[content_length] = '\0';
 800
 801         while ((val = strsep(&buf, "&"))) {
 802                 var = strsep(&val, "=");
 803                 if (val) {
 804                         ast_uri_decode(val, ast_uri_http_legacy);
 805                 } else  {
 806                         val = "";
 807                 }
 808                 ast_uri_decode(var, ast_uri_http_legacy);
 809                 if ((v = ast_variable_new(var, val, ""))) {
 810                         if (post_vars) {
 811                                 prev->next = v;
 812                         } else {
 813                                 post_vars = v;
 814                         }
 815                         prev = v;
 816                 }
 817         }
 818
 819         return post_vars;
 820 }
 821
 822 static int handle_uri(struct ast_tcptls_session_instance *ser, char *uri,
 823         enum ast_http_method method, struct ast_variable *headers)
 824 {
 825         char *c;
 826         int res = -1;
 827         char *params = uri;
 828         struct ast_http_uri *urih = NULL;
 829         int l;
 830         struct ast_variable *get_vars = NULL, *v, *prev = NULL;
 831         struct http_uri_redirect *redirect;
 832
 833         ast_debug(2, "HTTP Request URI is %s \n", uri);
 834
 835         strsep(&params, "?");
 836         /* Extract arguments from the request and store them in variables. */
 837         if (params) {
 838                 char *var, *val;
 839
 840                 while ((val = strsep(&params, "&"))) {
 841                         var = strsep(&val, "=");
 842                         if (val) {
 843                                 ast_uri_decode(val, ast_uri_http_legacy);
 844                         } else  {
 845                                 val = "";
 846                         }
 847                         ast_uri_decode(var, ast_uri_http_legacy);
 848                         if ((v = ast_variable_new(var, val, ""))) {
 849                                 if (get_vars) {
 850                                         prev->next = v;
 851                                 } else {
 852                                         get_vars = v;
 853                                 }
 854                                 prev = v;
 855                         }
 856                 }
 857         }
 858
 859         AST_RWLIST_RDLOCK(&uri_redirects);
 860         AST_RWLIST_TRAVERSE(&uri_redirects, redirect, entry) {
 861                 if (!strcasecmp(uri, redirect->target)) {
 862                         struct ast_str *http_header = ast_str_create(128);
 863                         ast_str_set(&http_header, 0, "Location: %s\r\n", redirect->dest);
 864                         ast_http_send(ser, method, 302, "Moved Temporarily", http_header, NULL, 0, 0);
 865
 866                         break;
 867                 }
 868         }
 869         AST_RWLIST_UNLOCK(&uri_redirects);
 870         if (redirect) {
 871                 goto cleanup;
 872         }
 873
 874         /* We want requests to start with the (optional) prefix and '/' */
 875         l = strlen(prefix);
 876         if (!strncasecmp(uri, prefix, l) && uri[l] == '/') {
 877                 uri += l + 1;
 878                 /* scan registered uris to see if we match one. */
 879                 AST_RWLIST_RDLOCK(&uris);
 880                 AST_RWLIST_TRAVERSE(&uris, urih, entry) {
 881                         l = strlen(urih->uri);
 882                         c = uri + l;    /* candidate */
 883                         ast_debug(2, "match request [%s] with handler [%s] len %d\n", uri, urih->uri, l);
 884                         if (strncasecmp(urih->uri, uri, l) /* no match */
 885                             || (*c && *c != '/')) { /* substring */
 886                                 continue;
 887                         }
 888                         if (*c == '/') {
 889                                 c++;
 890                         }
 891                         if (!*c || urih->has_subtree) {
 892                                 uri = c;
 893                                 break;
 894                         }
 895                 }
 896                 AST_RWLIST_UNLOCK(&uris);
 897         }
 898         if (urih) {
 899                 ast_debug(1, "Match made with [%s]\n", urih->uri);
 900                 if (!urih->no_decode_uri) {
 901                         ast_uri_decode(uri, ast_uri_http_legacy);
 902                 }
 903                 res = urih->callback(ser, urih, uri, method, get_vars, headers);
 904         } else {
 905                 ast_debug(1, "Requested URI [%s] has no handler\n", uri);
 906                 ast_http_error(ser, 404, "Not Found", "The requested URL was not found on this server.");
 907         }
 908
 909 cleanup:
 910         ast_variables_destroy(get_vars);
 911         return res;
 912 }
 913
 914 #ifdef DO_SSL
 915 #if defined(HAVE_FUNOPEN)
 916 #define HOOK_T int
 917 #define LEN_T int
 918 #else
 919 #define HOOK_T ssize_t
 920 #define LEN_T size_t
 921 #endif
 922
 923 /*!
 924  * replacement read/write functions for SSL support.
 925  * We use wrappers rather than SSL_read/SSL_write directly so
 926  * we can put in some debugging.
 927  */
 928 /*static HOOK_T ssl_read(void *cookie, char *buf, LEN_T len)
 929 {
 930         int i = SSL_read(cookie, buf, len-1);
 931 #if 0
 932         if (i >= 0)
 933                 buf[i] = '\0';
 934         ast_verbose("ssl read size %d returns %d <%s>\n", (int)len, i, buf);
 935 #endif
 936         return i;
 937 }
 938
 939 static HOOK_T ssl_write(void *cookie, const char *buf, LEN_T len)
 940 {
 941 #if 0
 942         char *s = ast_alloca(len+1);
 943         strncpy(s, buf, len);
 944         s[len] = '\0';
 945         ast_verbose("ssl write size %d <%s>\n", (int)len, s);
 946 #endif
 947         return SSL_write(cookie, buf, len);
 948 }
 949
 950 static int ssl_close(void *cookie)
 951 {
 952         close(SSL_get_fd(cookie));
 953         SSL_shutdown(cookie);
 954         SSL_free(cookie);
 955         return 0;
 956 }*/
 957 #endif  /* DO_SSL */
 958
 959 static struct ast_variable *parse_cookies(char *cookies)
 960 {
 961         char *cur;
 962         struct ast_variable *vars = NULL, *var;
 963
 964         while ((cur = strsep(&cookies, ";"))) {
 965                 char *name, *val;
 966
 967                 name = val = cur;
 968                 strsep(&val, "=");
 969
 970                 if (ast_strlen_zero(name) || ast_strlen_zero(val)) {
 971                         continue;
 972                 }
 973
 974                 name = ast_strip(name);
 975                 val = ast_strip_quoted(val, "\"", "\"");
 976
 977                 if (ast_strlen_zero(name) || ast_strlen_zero(val)) {
 978                         continue;
 979                 }
 980
 981                 ast_debug(1, "HTTP Cookie, Name: '%s'  Value: '%s'\n", name, val);
 982
 983                 var = ast_variable_new(name, val, __FILE__);
 984                 var->next = vars;
 985                 vars = var;
 986         }
 987
 988         return vars;
 989 }
 990
 991 /* get cookie from Request headers */
 992 struct ast_variable *ast_http_get_cookies(struct ast_variable *headers)
 993 {
 994         struct ast_variable *v, *cookies=NULL;
 995
 996         for (v = headers; v; v = v->next) {
 997                 if (!strcasecmp(v->name, "Cookie")) {
 998                         char *tmp = ast_strdupa(v->value);
 999                         if (cookies) {
1000                                 ast_variables_destroy(cookies);
1001                         }
1002
1003                         cookies = parse_cookies(tmp);
1004                 }
1005         }
1006         return cookies;
1007 }
1008
1009 static struct ast_http_auth *auth_create(const char *userid,
1010         const char *password)
1011 {
1012         RAII_VAR(struct ast_http_auth *, auth, NULL, ao2_cleanup);
1013         size_t userid_len;
1014         size_t password_len;
1015
1016         if (!userid || !password) {
1017                 ast_log(LOG_ERROR, "Invalid userid/password\n");
1018                 return NULL;
1019         }
1020
1021         userid_len = strlen(userid) + 1;
1022         password_len = strlen(password) + 1;
1023
1024         /* Allocate enough room to store everything in one memory block */
1025         auth = ao2_alloc(sizeof(*auth) + userid_len + password_len, NULL);
1026         if (!auth) {
1027                 return NULL;
1028         }
1029
1030         /* Put the userid right after the struct */
1031         auth->userid = (char *)(auth + 1);
1032         strcpy(auth->userid, userid);
1033
1034         /* Put the password right after the userid */
1035         auth->password = auth->userid + userid_len;
1036         strcpy(auth->password, password);
1037
1038         ao2_ref(auth, +1);
1039         return auth;
1040 }
1041
1042 #define BASIC_PREFIX "Basic "
1043 #define BASIC_LEN 6 /*!< strlen(BASIC_PREFIX) */
1044
1045 struct ast_http_auth *ast_http_get_auth(struct ast_variable *headers)
1046 {
1047         struct ast_variable *v;
1048
1049         for (v = headers; v; v = v->next) {
1050                 const char *base64;
1051                 char decoded[256] = {};
1052                 char *username;
1053                 char *password;
1054 #ifdef AST_DEVMODE
1055                 int cnt;
1056 #endif /* AST_DEVMODE */
1057
1058                 if (strcasecmp("Authorization", v->name) != 0) {
1059                         continue;
1060                 }
1061
1062                 if (!ast_begins_with(v->value, BASIC_PREFIX)) {
1063                         ast_log(LOG_DEBUG,
1064                                 "Unsupported Authorization scheme\n");
1065                         continue;
1066                 }
1067
1068                 /* Basic auth header parsing. RFC 2617, section 2.
1069                  *   credentials = "Basic" basic-credentials
1070                  *   basic-credentials = base64-user-pass
1071                  *   base64-user-pass  = <base64 encoding of user-pass,
1072                  *                        except not limited to 76 char/line>
1073                  *   user-pass   = userid ":" password
1074                  */
1075
1076                 base64 = v->value + BASIC_LEN;
1077
1078                 /* This will truncate "userid:password" lines to
1079                  * sizeof(decoded). The array is long enough that this shouldn't
1080                  * be a problem */
1081 #ifdef AST_DEVMODE
1082                 cnt =
1083 #endif /* AST_DEVMODE */
1084                 ast_base64decode((unsigned char*)decoded, base64,
1085                         sizeof(decoded) - 1);
1086                 ast_assert(cnt < sizeof(decoded));
1087
1088                 /* Split the string at the colon */
1089                 password = decoded;
1090                 username = strsep(&password, ":");
1091                 if (!password) {
1092                         ast_log(LOG_WARNING, "Invalid Authorization header\n");
1093                         return NULL;
1094                 }
1095
1096                 return auth_create(username, password);
1097         }
1098
1099         return NULL;
1100 }
1101
1102 static void *httpd_helper_thread(void *data)
1103 {
1104         char buf[4096];
1105         char header_line[4096];
1106         struct ast_tcptls_session_instance *ser = data;
1107         struct ast_variable *headers = NULL;
1108         struct ast_variable *tail = headers;
1109         char *uri, *method;
1110         enum ast_http_method http_method = AST_HTTP_UNKNOWN;
1111         const char *transfer_encoding;
1112
1113         if (ast_atomic_fetchadd_int(&session_count, +1) >= session_limit) {
1114                 goto done;
1115         }
1116
1117         if (!fgets(buf, sizeof(buf), ser->f)) {
1118                 goto done;
1119         }
1120
1121         /* Get method */
1122         method = ast_skip_blanks(buf);
1123         uri = ast_skip_nonblanks(method);
1124         if (*uri) {
1125                 *uri++ = '\0';
1126         }
1127
1128         if (!strcasecmp(method,"GET")) {
1129                 http_method = AST_HTTP_GET;
1130         } else if (!strcasecmp(method,"POST")) {
1131                 http_method = AST_HTTP_POST;
1132         } else if (!strcasecmp(method,"HEAD")) {
1133                 http_method = AST_HTTP_HEAD;
1134         } else if (!strcasecmp(method,"PUT")) {
1135                 http_method = AST_HTTP_PUT;
1136         } else if (!strcasecmp(method,"DELETE")) {
1137                 http_method = AST_HTTP_DELETE;
1138         } else if (!strcasecmp(method,"OPTIONS")) {
1139                 http_method = AST_HTTP_OPTIONS;
1140         }
1141
1142         uri = ast_skip_blanks(uri);     /* Skip white space */
1143
1144         if (*uri) {                     /* terminate at the first blank */
1145                 char *c = ast_skip_nonblanks(uri);
1146
1147                 if (*c) {
1148                         *c = '\0';
1149                 }
1150         }
1151
1152         /* process "Request Headers" lines */
1153         while (fgets(header_line, sizeof(header_line), ser->f)) {
1154                 char *name, *value;
1155
1156                 /* Trim trailing characters */
1157                 ast_trim_blanks(header_line);
1158                 if (ast_strlen_zero(header_line)) {
1159                         break;
1160                 }
1161
1162                 value = header_line;
1163                 name = strsep(&value, ":");
1164                 if (!value) {
1165                         continue;
1166                 }
1167
1168                 value = ast_skip_blanks(value);
1169                 if (ast_strlen_zero(value) || ast_strlen_zero(name)) {
1170                         continue;
1171                 }
1172
1173                 ast_trim_blanks(name);
1174
1175                 if (!headers) {
1176                         headers = ast_variable_new(name, value, __FILE__);
1177                         tail = headers;
1178                 } else {
1179                         tail->next = ast_variable_new(name, value, __FILE__);
1180                         tail = tail->next;
1181                 }
1182         }
1183
1184         transfer_encoding = get_transfer_encoding(headers);
1185         /* Transfer encoding defaults to identity */
1186         if (!transfer_encoding) {
1187                 transfer_encoding = "identity";
1188         }
1189
1190         /*
1191          * RFC 2616, section 3.6, we should respond with a 501 for any transfer-
1192          * codings we don't understand.
1193          */
1194         if (strcasecmp(transfer_encoding, "identity") != 0) {
1195                 /* Transfer encodings not supported */
1196                 ast_http_error(ser, 501, "Unimplemented", "Unsupported Transfer-Encoding.");
1197                 goto done;
1198         }
1199
1200         if (!*uri) {
1201                 ast_http_error(ser, 400, "Bad Request", "Invalid Request");
1202                 goto done;
1203         }
1204
1205         handle_uri(ser, uri, http_method, headers);
1206
1207 done:
1208         ast_atomic_fetchadd_int(&session_count, -1);
1209
1210         /* clean up all the header information */
1211         if (headers) {
1212                 ast_variables_destroy(headers);
1213         }
1214
1215         if (ser->f) {
1216                 fclose(ser->f);
1217         }
1218         ao2_ref(ser, -1);
1219         ser = NULL;
1220         return NULL;
1221 }
1222
1223 /*!
1224  * \brief Add a new URI redirect
1225  * The entries in the redirect list are sorted by length, just like the list
1226  * of URI handlers.
1227  */
1228 static void add_redirect(const char *value)
1229 {
1230         char *target, *dest;
1231         struct http_uri_redirect *redirect, *cur;
1232         unsigned int target_len;
1233         unsigned int total_len;
1234
1235         dest = ast_strdupa(value);
1236         dest = ast_skip_blanks(dest);
1237         target = strsep(&dest, " ");
1238         target = ast_skip_blanks(target);
1239         target = strsep(&target, " "); /* trim trailing whitespace */
1240
1241         if (!dest) {
1242                 ast_log(LOG_WARNING, "Invalid redirect '%s'\n", value);
1243                 return;
1244         }
1245
1246         target_len = strlen(target) + 1;
1247         total_len = sizeof(*redirect) + target_len + strlen(dest) + 1;
1248
1249         if (!(redirect = ast_calloc(1, total_len))) {
1250                 return;
1251         }
1252         redirect->dest = redirect->target + target_len;
1253         strcpy(redirect->target, target);
1254         strcpy(redirect->dest, dest);
1255
1256         AST_RWLIST_WRLOCK(&uri_redirects);
1257
1258         target_len--; /* So we can compare directly with strlen() */
1259         if (AST_RWLIST_EMPTY(&uri_redirects)
1260                 || strlen(AST_RWLIST_FIRST(&uri_redirects)->target) <= target_len ) {
1261                 AST_RWLIST_INSERT_HEAD(&uri_redirects, redirect, entry);
1262                 AST_RWLIST_UNLOCK(&uri_redirects);
1263
1264                 return;
1265         }
1266
1267         AST_RWLIST_TRAVERSE(&uri_redirects, cur, entry) {
1268                 if (AST_RWLIST_NEXT(cur, entry)
1269                         && strlen(AST_RWLIST_NEXT(cur, entry)->target) <= target_len ) {
1270                         AST_RWLIST_INSERT_AFTER(&uri_redirects, cur, redirect, entry);
1271                         AST_RWLIST_UNLOCK(&uri_redirects);
1272                         return;
1273                 }
1274         }
1275
1276         AST_RWLIST_INSERT_TAIL(&uri_redirects, redirect, entry);
1277
1278         AST_RWLIST_UNLOCK(&uri_redirects);
1279 }
1280
1281 static int __ast_http_load(int reload)
1282 {
1283         struct ast_config *cfg;
1284         struct ast_variable *v;
1285         int enabled=0;
1286         int newenablestatic=0;
1287         char newprefix[MAX_PREFIX] = "";
1288         struct http_uri_redirect *redirect;
1289         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
1290         uint32_t bindport = DEFAULT_PORT;
1291         RAII_VAR(struct ast_sockaddr *, addrs, NULL, ast_free);
1292         int num_addrs = 0;
1293         int http_tls_was_enabled = 0;
1294
1295         cfg = ast_config_load2("http.conf", "http", config_flags);
1296         if (cfg == CONFIG_STATUS_FILEMISSING || cfg == CONFIG_STATUS_FILEUNCHANGED || cfg == CONFIG_STATUS_FILEINVALID) {
1297                 return 0;
1298         }
1299
1300         http_tls_was_enabled = (reload && http_tls_cfg.enabled);
1301
1302         http_tls_cfg.enabled = 0;
1303         if (http_tls_cfg.certfile) {
1304                 ast_free(http_tls_cfg.certfile);
1305         }
1306         http_tls_cfg.certfile = ast_strdup(AST_CERTFILE);
1307
1308         if (http_tls_cfg.pvtfile) {
1309                 ast_free(http_tls_cfg.pvtfile);
1310         }
1311         http_tls_cfg.pvtfile = ast_strdup("");
1312
1313         if (http_tls_cfg.cipher) {
1314                 ast_free(http_tls_cfg.cipher);
1315         }
1316         http_tls_cfg.cipher = ast_strdup("");
1317
1318         AST_RWLIST_WRLOCK(&uri_redirects);
1319         while ((redirect = AST_RWLIST_REMOVE_HEAD(&uri_redirects, entry))) {
1320                 ast_free(redirect);
1321         }
1322         AST_RWLIST_UNLOCK(&uri_redirects);
1323
1324         ast_sockaddr_setnull(&https_desc.local_address);
1325
1326         if (cfg) {
1327                 v = ast_variable_browse(cfg, "general");
1328                 for (; v; v = v->next) {
1329
1330                         /* read tls config options while preventing unsupported options from being set */
1331                         if (strcasecmp(v->name, "tlscafile")
1332                                 && strcasecmp(v->name, "tlscapath")
1333                                 && strcasecmp(v->name, "tlscadir")
1334                                 && strcasecmp(v->name, "tlsverifyclient")
1335                                 && strcasecmp(v->name, "tlsdontverifyserver")
1336                                 && strcasecmp(v->name, "tlsclientmethod")
1337                                 && strcasecmp(v->name, "sslclientmethod")
1338                                 && strcasecmp(v->name, "tlscipher")
1339                                 && strcasecmp(v->name, "sslcipher")
1340                                 && !ast_tls_read_conf(&http_tls_cfg, &https_desc, v->name, v->value)) {
1341                                 continue;
1342                         }
1343
1344                         if (!strcasecmp(v->name, "enabled")) {
1345                                 enabled = ast_true(v->value);
1346                         } else if (!strcasecmp(v->name, "enablestatic")) {
1347                                 newenablestatic = ast_true(v->value);
1348                         } else if (!strcasecmp(v->name, "bindport")) {
1349                                 if (ast_parse_arg(v->value, PARSE_UINT32 | PARSE_IN_RANGE | PARSE_DEFAULT, &bindport, DEFAULT_PORT, 0, 65535)) {
1350                                         ast_log(LOG_WARNING, "Invalid port %s specified. Using default port %"PRId32, v->value, DEFAULT_PORT);
1351                                 }
1352                         } else if (!strcasecmp(v->name, "bindaddr")) {
1353                                 if (!(num_addrs = ast_sockaddr_resolve(&addrs, v->value, 0, AST_AF_UNSPEC))) {
1354                                         ast_log(LOG_WARNING, "Invalid bind address %s\n", v->value);
1355                                 }
1356                         } else if (!strcasecmp(v->name, "prefix")) {
1357                                 if (!ast_strlen_zero(v->value)) {
1358                                         newprefix[0] = '/';
1359                                         ast_copy_string(newprefix + 1, v->value, sizeof(newprefix) - 1);
1360                                 } else {
1361                                         newprefix[0] = '\0';
1362                                 }
1363                         } else if (!strcasecmp(v->name, "redirect")) {
1364                                 add_redirect(v->value);
1365                         } else if (!strcasecmp(v->name, "sessionlimit")) {
1366                                 if (ast_parse_arg(v->value, PARSE_INT32|PARSE_DEFAULT|PARSE_IN_RANGE,
1367                                                         &session_limit, DEFAULT_SESSION_LIMIT, 1, INT_MAX)) {
1368                                         ast_log(LOG_WARNING, "Invalid %s '%s' at line %d of http.conf\n",
1369                                                         v->name, v->value, v->lineno);
1370                                 }
1371                         } else {
1372                                 ast_log(LOG_WARNING, "Ignoring unknown option '%s' in http.conf\n", v->name);
1373                         }
1374                 }
1375
1376                 ast_config_destroy(cfg);
1377         }
1378
1379         if (strcmp(prefix, newprefix)) {
1380                 ast_copy_string(prefix, newprefix, sizeof(prefix));
1381         }
1382         enablestatic = newenablestatic;
1383
1384         if (num_addrs && enabled) {
1385                 int i;
1386                 for (i = 0; i < num_addrs; ++i) {
1387                         ast_sockaddr_copy(&http_desc.local_address, &addrs[i]);
1388                         if (!ast_sockaddr_port(&http_desc.local_address)) {
1389                                 ast_sockaddr_set_port(&http_desc.local_address, bindport);
1390                         }
1391                         ast_tcptls_server_start(&http_desc);
1392                         if (http_desc.accept_fd == -1) {
1393                                 ast_log(LOG_WARNING, "Failed to start HTTP server for address %s\n", ast_sockaddr_stringify(&addrs[i]));
1394                                 ast_sockaddr_setnull(&http_desc.local_address);
1395                         } else {
1396                                 ast_verb(1, "Bound HTTP server to address %s\n", ast_sockaddr_stringify(&addrs[i]));
1397                                 break;
1398                         }
1399                 }
1400                 /* When no specific TLS bindaddr is specified, we just use
1401                  * the non-TLS bindaddress here.
1402                  */
1403                 if (ast_sockaddr_isnull(&https_desc.local_address) && http_desc.accept_fd != -1) {
1404                         ast_sockaddr_copy(&https_desc.local_address, &https_desc.local_address);
1405                         /* Of course, we can't use the same port though.
1406                          * Since no bind address was specified, we just use the
1407                          * default TLS port
1408                          */
1409                         ast_sockaddr_set_port(&https_desc.local_address, DEFAULT_TLS_PORT);
1410                 }
1411         }
1412         if (http_tls_was_enabled && !http_tls_cfg.enabled) {
1413                 ast_tcptls_server_stop(&https_desc);
1414         } else if (http_tls_cfg.enabled && !ast_sockaddr_isnull(&https_desc.local_address)) {
1415                 /* We can get here either because a TLS-specific address was specified
1416                  * or because we copied the non-TLS address here. In the case where
1417                  * we read an explicit address from the config, there may have been
1418                  * no port specified, so we'll just use the default TLS port.
1419                  */
1420                 if (!ast_sockaddr_port(&https_desc.local_address)) {
1421                         ast_sockaddr_set_port(&https_desc.local_address, DEFAULT_TLS_PORT);
1422                 }
1423                 if (ast_ssl_setup(https_desc.tls_cfg)) {
1424                         ast_tcptls_server_start(&https_desc);
1425                 }
1426         }
1427
1428         return 0;
1429 }
1430
1431 static char *handle_show_http(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1432 {
1433         struct ast_http_uri *urih;
1434         struct http_uri_redirect *redirect;
1435
1436         switch (cmd) {
1437         case CLI_INIT:
1438                 e->command = "http show status";
1439                 e->usage =
1440                         "Usage: http show status\n"
1441                         "       Lists status of internal HTTP engine\n";
1442                 return NULL;
1443         case CLI_GENERATE:
1444                 return NULL;
1445         }
1446
1447         if (a->argc != 3) {
1448                 return CLI_SHOWUSAGE;
1449         }
1450         ast_cli(a->fd, "HTTP Server Status:\n");
1451         ast_cli(a->fd, "Prefix: %s\n", prefix);
1452         if (ast_sockaddr_isnull(&http_desc.old_address)) {
1453                 ast_cli(a->fd, "Server Disabled\n\n");
1454         } else {
1455                 ast_cli(a->fd, "Server Enabled and Bound to %s\n\n",
1456                         ast_sockaddr_stringify(&http_desc.old_address));
1457                 if (http_tls_cfg.enabled) {
1458                         ast_cli(a->fd, "HTTPS Server Enabled and Bound to %s\n\n",
1459                                 ast_sockaddr_stringify(&https_desc.old_address));
1460                 }
1461         }
1462
1463         ast_cli(a->fd, "Enabled URI's:\n");
1464         AST_RWLIST_RDLOCK(&uris);
1465         if (AST_RWLIST_EMPTY(&uris)) {
1466                 ast_cli(a->fd, "None.\n");
1467         } else {
1468                 AST_RWLIST_TRAVERSE(&uris, urih, entry)
1469                         ast_cli(a->fd, "%s/%s%s => %s\n", prefix, urih->uri, (urih->has_subtree ? "/..." : "" ), urih->description);
1470         }
1471         AST_RWLIST_UNLOCK(&uris);
1472
1473         ast_cli(a->fd, "\nEnabled Redirects:\n");
1474         AST_RWLIST_RDLOCK(&uri_redirects);
1475         AST_RWLIST_TRAVERSE(&uri_redirects, redirect, entry)
1476                 ast_cli(a->fd, "  %s => %s\n", redirect->target, redirect->dest);
1477         if (AST_RWLIST_EMPTY(&uri_redirects)) {
1478                 ast_cli(a->fd, "  None.\n");
1479         }
1480         AST_RWLIST_UNLOCK(&uri_redirects);
1481
1482         return CLI_SUCCESS;
1483 }
1484
1485 int ast_http_reload(void)
1486 {
1487         return __ast_http_load(1);
1488 }
1489
1490 static struct ast_cli_entry cli_http[] = {
1491         AST_CLI_DEFINE(handle_show_http, "Display HTTP server status"),
1492 };
1493
1494 static void http_shutdown(void)
1495 {
1496         struct http_uri_redirect *redirect;
1497         ast_cli_unregister_multiple(cli_http, ARRAY_LEN(cli_http));
1498
1499         ast_tcptls_server_stop(&http_desc);
1500         if (http_tls_cfg.enabled) {
1501                 ast_tcptls_server_stop(&https_desc);
1502         }
1503         ast_free(http_tls_cfg.certfile);
1504         ast_free(http_tls_cfg.pvtfile);
1505         ast_free(http_tls_cfg.cipher);
1506
1507         ast_http_uri_unlink(&statusuri);
1508         ast_http_uri_unlink(&staticuri);
1509
1510         AST_RWLIST_WRLOCK(&uri_redirects);
1511         while ((redirect = AST_RWLIST_REMOVE_HEAD(&uri_redirects, entry))) {
1512                 ast_free(redirect);
1513         }
1514         AST_RWLIST_UNLOCK(&uri_redirects);
1515 }
1516
1517 int ast_http_init(void)
1518 {
1519         ast_http_uri_link(&statusuri);
1520         ast_http_uri_link(&staticuri);
1521         ast_cli_register_multiple(cli_http, ARRAY_LEN(cli_http));
1522         ast_register_atexit(http_shutdown);
1523
1524         return __ast_http_load(0);
1525 }