2 This file is part of GNUnet.
3 (C) 2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 #include <gnunet_util_lib.h>
23 #include <gnunet_gns_service.h>
24 #include <microhttpd.h>
25 #include <curl/curl.h>
27 #include "gns_proxy_proto.h"
31 #include <gnutls/gnutls.h>
32 #include <gnutls/x509.h>
33 #include <gnutls/abstract.h>
34 #include <gnutls/crypto.h>
37 #define GNUNET_GNS_PROXY_PORT 7777
38 #define MHD_MAX_CONNECTIONS 300
39 #define MAX_HTTP_URI_LENGTH 2048
41 /* MHD/cURL defines */
42 #define BUF_WAIT_FOR_CURL 0
43 #define BUF_WAIT_FOR_MHD 1
44 #define BUF_WAIT_FOR_PP 2
45 #define HTML_HDR_CONTENT "Content-Type: text/html"
47 /* buffer padding for proper RE matching */
48 #define CURL_BUF_PADDING 1000
51 //#define RE_DOTPLUS "<a href=\"http://(([A-Za-z]+[.])+)([+])"
52 #define RE_A_HREF "href=\"https?://(([A-Za-z0-9]+[.])+)([+]|[a-z]+)"
53 #define RE_N_MATCHES 4
55 /* The usual suspects */
57 #define HTTPS_PORT 443
61 * A structure for CA cert/key
66 gnutls_x509_crt_t cert;
69 gnutls_x509_privkey_t key;
72 #define MAX_PEM_SIZE (10 * 1024)
75 * Structure for GNS certificates
77 struct ProxyGNSCertificate
79 /* The certificate as PEM */
80 char cert[MAX_PEM_SIZE];
82 /* The private key as PEM */
83 char key[MAX_PEM_SIZE];
88 * A structure for socks requests
92 /* The client socket */
93 struct GNUNET_NETWORK_Handle *sock;
95 /* The server socket */
96 struct GNUNET_NETWORK_Handle *remote_sock;
101 /* Client socket read task */
102 GNUNET_SCHEDULER_TaskIdentifier rtask;
104 /* Server socket read task */
105 GNUNET_SCHEDULER_TaskIdentifier fwdrtask;
107 /* Client socket write task */
108 GNUNET_SCHEDULER_TaskIdentifier wtask;
110 /* Server socket write task */
111 GNUNET_SCHEDULER_TaskIdentifier fwdwtask;
119 /* Length of data in read buffer */
120 unsigned int rbuf_len;
122 /* Length of data in write buffer */
123 unsigned int wbuf_len;
125 /* This handle is scheduled for cleanup? */
128 /* Shall we close the client socket on cleanup? */
133 * DLL for Network Handles
135 struct NetworkHandleList
138 struct NetworkHandleList *next;
141 struct NetworkHandleList *prev;
144 struct GNUNET_NETWORK_Handle *h;
148 * A structure for all running Httpds
153 struct MhdHttpList *prev;
156 struct MhdHttpList *next;
158 /* is this an ssl daemon? */
161 /* the domain name to server (only important for SSL) */
164 /* The daemon handle */
165 struct MHD_Daemon *daemon;
167 /* Optional proxy certificate used */
168 struct ProxyGNSCertificate *proxy_cert;
171 GNUNET_SCHEDULER_TaskIdentifier httpd_task;
173 /* Handles associated with this daemon */
174 struct NetworkHandleList *socket_handles_head;
176 /* Handles associated with this daemon */
177 struct NetworkHandleList *socket_handles_tail;
181 * A structure for MHD<->cURL streams
186 struct ProxyCurlTask *prev;
189 struct ProxyCurlTask *next;
194 /* Optional header replacements for curl (LEHO) */
195 struct curl_slist *headers;
197 /* Optional resolver replacements for curl (LEHO) */
198 struct curl_slist *resolver;
200 /* curl response code */
201 long curl_response_code;
203 /* The URL to fetch */
204 char url[MAX_HTTP_URI_LENGTH];
206 /* The cURL write buffer / MHD read buffer */
207 char buffer[CURL_MAX_WRITE_SIZE + CURL_BUF_PADDING];
209 /* Read pos of the data in the buffer */
210 char *buffer_read_ptr;
212 /* Write pos in the buffer */
213 char *buffer_write_ptr;
215 /* The buffer status (BUF_WAIT_FOR_CURL or BUF_WAIT_FOR_MHD) */
218 /* Number of bytes in buffer */
219 unsigned int bytes_in_buffer;
221 /* Indicates wheather the download is in progress */
222 int download_in_progress;
224 /* Indicates wheather the download was successful */
225 int download_is_finished;
227 /* Indicates wheather the download failed */
230 /* Indicates wheather we need to parse HTML */
233 /* Indicates wheather we are postprocessing the HTML right now */
234 int is_postprocessing;
236 /* Indicates wheather postprocessing has finished */
240 GNUNET_SCHEDULER_TaskIdentifier pp_task;
243 struct ProxyREMatch *pp_match_head;
246 struct ProxyREMatch *pp_match_tail;
248 /* The authority of the corresponding host (site of origin) */
251 /* The hostname (Host header field) */
254 /* The LEgacy HOstname (can be empty) */
257 /* The associated daemon list entry */
258 struct MhdHttpList *mhd;
260 /* The associated response */
261 struct MHD_Response *response;
264 struct ProxySetCookieHeader *set_cookies_head;
267 struct ProxySetCookieHeader *set_cookies_tail;
269 /* connection status */
276 struct MHD_Connection *connection;
279 size_t put_read_offset;
280 size_t put_read_size;
285 * Struct for RE matches in postprocessing of HTML
290 struct ProxyREMatch *next;
293 struct ProxyREMatch *prev;
302 struct GNUNET_GNS_ShortenRequest *shorten_task;
307 /* start of match in buffer */
310 /* end of match in buffer */
313 /* associated proxycurltask */
314 struct ProxyCurlTask *ctask;
318 * Struct for set-cookies
320 struct ProxySetCookieHeader
323 struct ProxySetCookieHeader *next;
326 struct ProxySetCookieHeader *prev;
332 /* The port the proxy is running on (default 7777) */
333 static unsigned long port = GNUNET_GNS_PROXY_PORT;
335 /* The CA file (pem) to use for the proxy CA */
336 static char* cafile_opt;
338 /* The listen socket of the proxy */
339 static struct GNUNET_NETWORK_Handle *lsock;
341 /* The listen task ID */
342 GNUNET_SCHEDULER_TaskIdentifier ltask;
344 /* The cURL download task */
345 GNUNET_SCHEDULER_TaskIdentifier curl_download_task;
347 /* The non SSL httpd daemon handle */
348 static struct MHD_Daemon *httpd;
350 /* Number of current mhd connections */
351 static unsigned int total_mhd_connections;
353 /* The cURL multi handle */
354 static CURLM *curl_multi;
356 /* Handle to the GNS service */
357 static struct GNUNET_GNS_Handle *gns_handle;
359 /* DLL for ProxyCurlTasks */
360 static struct ProxyCurlTask *ctasks_head;
362 /* DLL for ProxyCurlTasks */
363 static struct ProxyCurlTask *ctasks_tail;
365 /* DLL for http daemons */
366 static struct MhdHttpList *mhd_httpd_head;
368 /* DLL for http daemons */
369 static struct MhdHttpList *mhd_httpd_tail;
371 /* Handle to the regex for dotplus (.+) replacement in HTML */
372 static regex_t re_dotplus;
374 /* The users local GNS zone hash */
375 static struct GNUNET_CRYPTO_ShortHashCode local_gns_zone;
377 /* The users local private zone */
378 static struct GNUNET_CRYPTO_ShortHashCode local_private_zone;
380 /* The users local shorten zone */
381 static struct GNUNET_CRYPTO_ShortHashCode local_shorten_zone;
383 /* The CA for SSL certificate generation */
384 static struct ProxyCA proxy_ca;
386 /* UNIX domain socket for mhd */
387 struct GNUNET_NETWORK_Handle *mhd_unix_socket;
389 /* Shorten zone private key */
390 struct GNUNET_CRYPTO_RsaPrivateKey *shorten_zonekey;
393 * Checks if name is in tld
395 * @param name the name to check
396 * @param tld the TLD to check for
397 * @return GNUNET_YES or GNUNET_NO
400 is_tld(const char* name, const char* tld)
404 if (strlen(name) <= strlen(tld))
407 offset = strlen(name) - strlen(tld);
408 if (0 != strcmp (name+offset, tld))
410 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
411 "%s is not in .%s TLD\n", name, tld);
419 get_uri_val_iter (void *cls,
420 enum MHD_ValueKind kind,
426 if (strlen (buf) + strlen (value) + 3 > MAX_HTTP_URI_LENGTH)
428 sprintf (buf+strlen (buf), "?%s=%s", key, value);
434 * Read HTTP request header field 'Host'
436 * @param cls buffer to write to
437 * @param kind value kind
438 * @param key field key
439 * @param value field value
440 * @return MHD_NO when Host found
443 con_val_iter (void *cls,
444 enum MHD_ValueKind kind,
448 struct ProxyCurlTask *ctask = cls;
449 char* buf = ctask->host;
453 if (0 == strcmp ("Host", key))
459 if (0 == strcmp ("Accept-Encoding", key))
464 cstr = GNUNET_malloc (strlen (key) + strlen (hdr_val) + 3);
465 GNUNET_snprintf (cstr, strlen (key) + strlen (hdr_val) + 3,
466 "%s: %s", key, hdr_val);
468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
469 "Client Header: %s\n", cstr);
471 ctask->headers = curl_slist_append (ctask->headers, cstr);
479 * Callback for MHD response
482 * @param pos in buffer
484 * @param max space in buffer
485 * @return number of bytes written
488 mhd_content_cb (void *cls,
494 * Check HTTP response header for mime
496 * @param buffer curl buffer
497 * @param size curl blocksize
498 * @param nmemb curl blocknumber
500 * @return size of read bytes
503 curl_check_hdr (void *buffer, size_t size, size_t nmemb, void *cls)
505 size_t bytes = size * nmemb;
506 struct ProxyCurlTask *ctask = cls;
507 int html_mime_len = strlen (HTML_HDR_CONTENT);
508 int cookie_hdr_len = strlen (MHD_HTTP_HEADER_SET_COOKIE);
509 char hdr_mime[html_mime_len+1];
510 char hdr_generic[bytes+1];
511 char new_cookie_hdr[bytes+strlen (ctask->leho)+1];
520 if (NULL == ctask->response)
522 /* FIXME: get total size from curl (if available) */
523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
524 "Creating response for %s\n", ctask->url);
525 ctask->response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
526 sizeof (ctask->buffer),
530 ctask->ready_to_queue = GNUNET_YES;
534 if (html_mime_len <= bytes)
536 memcpy (hdr_mime, buffer, html_mime_len);
537 hdr_mime[html_mime_len] = '\0';
539 if (0 == strcmp (hdr_mime, HTML_HDR_CONTENT))
541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
542 "Got HTML HTTP response header\n");
543 ctask->parse_content = GNUNET_YES;
547 if (cookie_hdr_len > bytes)
550 memcpy (hdr_generic, buffer, bytes);
551 hdr_generic[bytes] = '\0';
553 if ('\n' == hdr_generic[bytes-1])
554 hdr_generic[bytes-1] = '\0';
556 if (hdr_generic[bytes-2] == '\r')
557 hdr_generic[bytes-2] = '\0';
559 if (0 == memcmp (hdr_generic,
560 MHD_HTTP_HEADER_SET_COOKIE,
563 ndup = GNUNET_strdup (hdr_generic+cookie_hdr_len+1);
564 memset (new_cookie_hdr, 0, sizeof (new_cookie_hdr));
565 tok = strtok (ndup, ";");
567 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
568 "Looking for cookie in : %s\n", hdr_generic);
570 for (; tok != NULL; tok = strtok (NULL, ";"))
572 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
573 "Got Cookie token: %s\n", tok);
574 //memcpy (new_cookie_hdr+offset, tok, strlen (tok));
575 if (0 == memcmp (tok, " domain", strlen (" domain")))
577 cookie_domain = tok + strlen (" domain") + 1;
579 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
580 "Got Set-Cookie Domain: %s\n", cookie_domain);
582 if (strlen (cookie_domain) < strlen (ctask->leho))
584 delta_cdomain = strlen (ctask->leho) - strlen (cookie_domain);
585 if (0 == strcmp (cookie_domain, ctask->leho + (delta_cdomain)))
587 GNUNET_snprintf (new_cookie_hdr+offset,
588 sizeof (new_cookie_hdr),
589 " domain=%s", ctask->authority);
590 offset += strlen (" domain=") + strlen (ctask->authority);
591 new_cookie_hdr[offset] = ';';
596 else if (strlen (cookie_domain) == strlen (ctask->leho))
598 if (0 == strcmp (cookie_domain, ctask->leho))
600 GNUNET_snprintf (new_cookie_hdr+offset,
601 sizeof (new_cookie_hdr),
602 " domain=%s", ctask->host);
603 offset += strlen (" domain=") + strlen (ctask->host);
604 new_cookie_hdr[offset] = ';';
609 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
610 "Cookie domain invalid\n");
614 memcpy (new_cookie_hdr+offset, tok, strlen (tok));
615 offset += strlen (tok);
616 new_cookie_hdr[offset] = ';';
622 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
623 "Got Set-Cookie HTTP header %s\n", new_cookie_hdr);
625 if (GNUNET_NO == MHD_add_response_header (ctask->response,
626 MHD_HTTP_HEADER_SET_COOKIE,
629 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
630 "MHD: Error adding set-cookie header field %s\n",
631 hdr_generic+cookie_hdr_len+1);
636 ndup = GNUNET_strdup (hdr_generic);
637 hdr_type = strtok (ndup, ":");
639 if (NULL == hdr_type)
645 hdr_val = strtok (NULL, "");
653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
654 "Trying to set %s: %s\n",
657 if (GNUNET_NO == MHD_add_response_header (ctask->response,
661 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
662 "MHD: Error adding %s header field %s\n",
673 * @param hd a http daemon list entry
676 run_httpd (struct MhdHttpList *hd);
687 * Task run whenever HTTP server operations are pending.
690 * @param tc sched context
694 const struct GNUNET_SCHEDULER_TaskContext *tc);
697 run_mhd_now (struct MhdHttpList *hd)
699 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
702 "MHD: killing old task\n");
703 GNUNET_SCHEDULER_cancel (hd->httpd_task);
705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
706 "MHD: Scheduling MHD now\n");
707 hd->httpd_task = GNUNET_SCHEDULER_add_now (&do_httpd, hd);
711 * Ask cURL for the select sets and schedule download
714 curl_download_prepare ();
717 * Callback to free content
719 * @param cls content to free
720 * @param tc task context
723 mhd_content_free (void *cls,
724 const struct GNUNET_SCHEDULER_TaskContext *tc)
726 struct ProxyCurlTask *ctask = cls;
727 GNUNET_assert (NULL == ctask->pp_match_head);
729 if (NULL != ctask->headers)
730 curl_slist_free_all (ctask->headers);
732 if (NULL != ctask->headers)
733 curl_slist_free_all (ctask->resolver);
735 if (NULL != ctask->response)
736 MHD_destroy_response (ctask->response);
744 * Callback for MHD response
747 * @param pos in buffer
749 * @param max space in buffer
750 * @return number of bytes written
753 mhd_content_cb (void *cls,
758 struct ProxyCurlTask *ctask = cls;
759 struct ProxyREMatch *re_match = ctask->pp_match_head;
761 long long int bytes_to_copy = ctask->buffer_write_ptr - ctask->buffer_read_ptr;
763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
764 "MHD: content cb for %s. To copy: %lld\n",
765 ctask->url, bytes_to_copy);
766 GNUNET_assert (bytes_to_copy >= 0);
768 if ((GNUNET_YES == ctask->download_is_finished) &&
769 (GNUNET_NO == ctask->download_error) &&
770 (0 == bytes_to_copy) &&
771 (BUF_WAIT_FOR_CURL == ctask->buf_status))
773 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
774 "MHD: sending response for %s\n", ctask->url);
775 ctask->download_in_progress = GNUNET_NO;
776 run_mhd_now (ctask->mhd);
777 GNUNET_SCHEDULER_add_now (&mhd_content_free, ctask);
778 total_mhd_connections--;
779 return MHD_CONTENT_READER_END_OF_STREAM;
782 if ((GNUNET_YES == ctask->download_error) &&
783 (GNUNET_YES == ctask->download_is_finished) &&
784 (0 == bytes_to_copy) &&
785 (BUF_WAIT_FOR_CURL == ctask->buf_status))
787 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
788 "MHD: sending error response\n");
789 ctask->download_in_progress = GNUNET_NO;
790 run_mhd_now (ctask->mhd);
791 GNUNET_SCHEDULER_add_now (&mhd_content_free, ctask);
792 total_mhd_connections--;
793 return MHD_CONTENT_READER_END_WITH_ERROR;
796 if ( ctask->buf_status == BUF_WAIT_FOR_CURL )
800 for (; NULL != re_match; re_match = ctask->pp_match_head)
802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
803 "MHD: Processing PP %s\n",
805 bytes_to_copy = re_match->start - ctask->buffer_read_ptr;
806 GNUNET_assert (bytes_to_copy >= 0);
808 if (bytes_to_copy+copied > max)
810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
811 "MHD: buffer in response too small for %d. Using available space (%d). (%s)\n",
815 memcpy (buf+copied, ctask->buffer_read_ptr, max-copied);
816 ctask->buffer_read_ptr += max-copied;
818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
819 "MHD: copied %d bytes\n", copied);
823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
824 "MHD: copying %d bytes to mhd response at offset %d\n",
825 bytes_to_copy, ctask->buffer_read_ptr);
826 memcpy (buf+copied, ctask->buffer_read_ptr, bytes_to_copy);
827 copied += bytes_to_copy;
829 if (GNUNET_NO == re_match->done)
831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
832 "MHD: Waiting for PP of %s\n", re_match->hostname);
833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
834 "MHD: copied %d bytes\n", copied);
835 ctask->buffer_read_ptr += bytes_to_copy;
839 if (strlen (re_match->result) > (max - copied))
841 //FIXME partially copy domain here
842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
843 "MHD: buffer in response too small for %s! (%s)\n",
846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
847 "MHD: copied %d bytes\n", copied);
848 ctask->buffer_read_ptr += bytes_to_copy;
852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
853 "MHD: Adding PP result %s to buffer\n",
855 memcpy (buf+copied, re_match->result, strlen (re_match->result));
856 copied += strlen (re_match->result);
857 ctask->buffer_read_ptr = re_match->end;
858 GNUNET_CONTAINER_DLL_remove (ctask->pp_match_head,
859 ctask->pp_match_tail,
861 GNUNET_free (re_match);
864 bytes_to_copy = ctask->buffer_write_ptr - ctask->buffer_read_ptr;
866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
867 "MHD: copied: %d left: %d, space left in buf: %d\n",
869 bytes_to_copy, max-copied);
871 GNUNET_assert (0 <= bytes_to_copy);
873 if (GNUNET_NO == ctask->download_is_finished)
875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
876 "MHD: Purging buffer\n");
877 memmove (ctask->buffer, ctask->buffer_read_ptr, bytes_to_copy);
878 ctask->buffer_read_ptr = ctask->buffer;
879 ctask->buffer_write_ptr = ctask->buffer + bytes_to_copy;
880 ctask->buffer[bytes_to_copy] = '\0';
883 if (bytes_to_copy+copied > max)
884 bytes_to_copy = max-copied;
886 if (0 > bytes_to_copy)
889 memcpy (buf+copied, ctask->buffer_read_ptr, bytes_to_copy);
890 ctask->buffer_read_ptr += bytes_to_copy;
891 copied += bytes_to_copy;
892 ctask->buf_status = BUF_WAIT_FOR_CURL;
894 if (NULL != ctask->curl)
895 curl_easy_pause (ctask->curl, CURLPAUSE_CONT);
897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
898 "MHD: copied %d bytes\n", copied);
899 run_mhd_now (ctask->mhd);
904 * Shorten result callback
906 * @param cls the proxycurltask
907 * @param short_name the shortened name (NULL on error)
910 process_shorten (void* cls, const char* short_name)
912 struct ProxyREMatch *re_match = cls;
913 char result[sizeof (re_match->result)];
915 if (NULL == short_name)
917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
918 "PP: Unable to shorten %s\n",
920 GNUNET_CONTAINER_DLL_remove (re_match->ctask->pp_match_head,
921 re_match->ctask->pp_match_tail,
923 GNUNET_free (re_match);
927 if (0 == strcmp (short_name, re_match->ctask->leho))
928 strcpy (result, re_match->ctask->host);
930 strcpy (result, short_name);
932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
933 "PP: Shorten %s -> %s\n",
937 if (re_match->ctask->mhd->is_ssl)
938 sprintf (re_match->result, "href=\"https://%s", result);
940 sprintf (re_match->result, "href=\"http://%s", result);
942 re_match->done = GNUNET_YES;
943 run_mhd_now (re_match->ctask->mhd);
948 * Postprocess data in buffer. From read ptr to write ptr
950 * @param cls the curlproxytask
951 * @param tc task context
954 postprocess_buffer (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
956 struct ProxyCurlTask *ctask = cls;
957 struct ProxyREMatch *re_match;
958 char* re_ptr = ctask->buffer_read_ptr;
959 char re_hostname[255];
960 regmatch_t m[RE_N_MATCHES];
962 ctask->pp_task = GNUNET_SCHEDULER_NO_TASK;
964 if (GNUNET_YES != ctask->parse_content)
966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
967 "PP: Not parsing content\n");
968 ctask->buf_status = BUF_WAIT_FOR_MHD;
969 run_mhd_now (ctask->mhd);
973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
974 "PP: We need to parse the HTML\n");
976 /* 0 means match found */
977 while (0 == regexec (&re_dotplus, re_ptr, RE_N_MATCHES, m, 0))
979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
980 "PP: regex match\n");
982 GNUNET_assert (m[1].rm_so != -1);
984 memset (re_hostname, 0, sizeof (re_hostname));
985 memcpy (re_hostname, re_ptr+m[1].rm_so, (m[3].rm_eo-m[1].rm_so));
987 re_match = GNUNET_malloc (sizeof (struct ProxyREMatch));
988 re_match->start = re_ptr + m[0].rm_so;
989 re_match->end = re_ptr + m[3].rm_eo;
990 re_match->done = GNUNET_NO;
991 re_match->ctask = ctask;
992 strcpy (re_match->hostname, re_hostname);
993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
994 "PP: Got hostname %s\n", re_hostname);
995 re_ptr += m[3].rm_eo;
997 if (GNUNET_YES == is_tld (re_match->hostname, GNUNET_GNS_TLD_PLUS))
999 re_match->hostname[strlen(re_match->hostname)-1] = '\0';
1000 strcpy (re_match->hostname+strlen(re_match->hostname),
1004 re_match->shorten_task = GNUNET_GNS_shorten_zone (gns_handle,
1006 &local_private_zone,
1007 &local_shorten_zone,
1010 re_match); //FIXME cancel appropriately
1012 GNUNET_CONTAINER_DLL_insert_tail (ctask->pp_match_head,
1013 ctask->pp_match_tail,
1017 ctask->buf_status = BUF_WAIT_FOR_MHD;
1018 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1019 "PP: No more matches\n");
1020 run_mhd_now (ctask->mhd);
1024 * Handle data from cURL
1026 * @param ptr pointer to the data
1027 * @param size number of blocks of data
1028 * @param nmemb blocksize
1029 * @param ctx the curlproxytask
1030 * @return number of bytes handled
1033 curl_download_cb (void *ptr, size_t size, size_t nmemb, void* ctx)
1035 const char *cbuf = ptr;
1036 size_t total = size * nmemb;
1037 struct ProxyCurlTask *ctask = ctx;
1038 size_t buf_space = sizeof (ctask->buffer) -
1039 (ctask->buffer_write_ptr-ctask->buffer);
1041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1042 "CURL: Got %d. %d free in buffer\n",
1045 if (total > (buf_space - CURL_BUF_PADDING))
1047 if (ctask->buf_status == BUF_WAIT_FOR_CURL)
1049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1050 "CURL: Buffer full starting postprocessing\n");
1051 ctask->buf_status = BUF_WAIT_FOR_PP;
1052 ctask->pp_task = GNUNET_SCHEDULER_add_now (&postprocess_buffer,
1054 return CURL_WRITEFUNC_PAUSE;
1057 /* we should not get called in that case */
1058 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1059 "CURL: called out of context and no space in buffer!\n");
1060 return CURL_WRITEFUNC_PAUSE;
1063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1064 "CURL: Copying %d bytes to buffer (%s)\n", total, ctask->url);
1065 memcpy (ctask->buffer_write_ptr, cbuf, total);
1066 ctask->bytes_in_buffer += total;
1067 ctask->buffer_write_ptr += total;
1068 ctask->buffer_write_ptr[0] = '\0';
1074 * Task that is run when we are ready to receive more data
1077 * @param cls closure
1078 * @param tc task context
1081 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1084 * Ask cURL for the select sets and schedule download
1087 curl_download_prepare ()
1094 struct GNUNET_NETWORK_FDSet *grs;
1095 struct GNUNET_NETWORK_FDSet *gws;
1097 struct GNUNET_TIME_Relative rtime;
1103 mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max);
1105 if (mret != CURLM_OK)
1107 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1108 "%s failed at %s:%d: `%s'\n",
1109 "curl_multi_fdset", __FILE__, __LINE__,
1110 curl_multi_strerror (mret));
1111 //TODO cleanup here?
1115 mret = curl_multi_timeout (curl_multi, &to);
1116 rtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1119 "cURL multi fds: max=%d timeout=%llu\n", max, to);
1121 grs = GNUNET_NETWORK_fdset_create ();
1122 gws = GNUNET_NETWORK_fdset_create ();
1123 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1124 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1126 "Scheduling task cURL\n");
1128 if (curl_download_task != GNUNET_SCHEDULER_NO_TASK)
1129 GNUNET_SCHEDULER_cancel (curl_download_task);
1133 curl_download_task =
1134 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1137 &curl_task_download, curl_multi);
1139 else if (NULL != ctasks_head)
1141 /* as specified in curl docs */
1142 curl_download_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
1143 &curl_task_download,
1146 GNUNET_NETWORK_fdset_destroy (gws);
1147 GNUNET_NETWORK_fdset_destroy (grs);
1153 * Task that is run when we are ready to receive more data
1156 * @param cls closure
1157 * @param tc task context
1160 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1164 struct CURLMsg *msg;
1166 struct ProxyCurlTask *ctask;
1170 struct ProxyCurlTask *clean_head = NULL;
1171 struct ProxyCurlTask *clean_tail = NULL;
1173 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1175 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1177 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1178 "Shutdown requested while trying to download\n");
1182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1190 mret = curl_multi_perform (curl_multi, &running);
1192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1193 "Running curl tasks: %d\n", running);
1195 ctask = ctasks_head;
1196 for (; ctask != NULL; ctask = ctask->next)
1198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1199 "CTask: %s\n", ctask->url);
1203 if (num_ctasks != running)
1205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1206 "%d ctasks, %d curl running\n", num_ctasks, running);
1211 ctask = ctasks_head;
1212 msg = curl_multi_info_read (curl_multi, &msgnum);
1213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1214 "Messages left: %d\n", msgnum);
1221 if ((msg->data.result != CURLE_OK) &&
1222 (msg->data.result != CURLE_GOT_NOTHING))
1224 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1225 "Download curl failed");
1227 for (; ctask != NULL; ctask = ctask->next)
1229 if (NULL == ctask->curl)
1232 if (memcmp (msg->easy_handle, ctask->curl, sizeof (CURL)) != 0)
1235 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1236 "CURL: Download failed for task %s: %s.\n",
1238 curl_easy_strerror (msg->data.result));
1239 ctask->download_is_finished = GNUNET_YES;
1240 ctask->download_error = GNUNET_YES;
1241 if (CURLE_OK == curl_easy_getinfo (ctask->curl,
1242 CURLINFO_RESPONSE_CODE,
1244 ctask->curl_response_code = resp_code;
1245 ctask->ready_to_queue = MHD_YES;
1246 ctask->buf_status = BUF_WAIT_FOR_MHD;
1247 run_mhd_now (ctask->mhd);
1249 GNUNET_CONTAINER_DLL_remove (ctasks_head, ctasks_tail,
1251 GNUNET_CONTAINER_DLL_insert (clean_head, clean_tail, ctask);
1254 GNUNET_assert (ctask != NULL);
1258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1259 "CURL: download completed.\n");
1261 for (; ctask != NULL; ctask = ctask->next)
1263 if (NULL == ctask->curl)
1266 if (memcmp (msg->easy_handle, ctask->curl, sizeof (CURL)) != 0)
1269 if (ctask->buf_status != BUF_WAIT_FOR_CURL)
1272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1273 "CURL: completed task %s found.\n", ctask->url);
1274 if (CURLE_OK == curl_easy_getinfo (ctask->curl,
1275 CURLINFO_RESPONSE_CODE,
1277 ctask->curl_response_code = resp_code;
1280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1281 "CURL: Completed ctask!\n");
1282 if (GNUNET_SCHEDULER_NO_TASK == ctask->pp_task)
1284 ctask->buf_status = BUF_WAIT_FOR_PP;
1285 ctask->pp_task = GNUNET_SCHEDULER_add_now (&postprocess_buffer,
1289 ctask->ready_to_queue = MHD_YES;
1290 ctask->download_is_finished = GNUNET_YES;
1292 /* We MUST not modify the multi handle else we loose messages */
1293 GNUNET_CONTAINER_DLL_remove (ctasks_head, ctasks_tail,
1295 GNUNET_CONTAINER_DLL_insert (clean_head, clean_tail, ctask);
1299 GNUNET_assert (ctask != NULL);
1301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1302 "CURL: %s\n", curl_easy_strerror(msg->data.result));
1308 } while (msgnum > 0);
1310 for (ctask=clean_head; ctask != NULL; ctask = ctask->next)
1312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1313 "CURL: Removing task %s.\n", ctask->url);
1314 curl_multi_remove_handle (curl_multi, ctask->curl);
1315 curl_easy_cleanup (ctask->curl);
1320 for (ctask=ctasks_head; ctask != NULL; ctask = ctask->next)
1325 if (num_ctasks != running)
1327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1328 "CURL: %d tasks, %d running\n", num_ctasks, running);
1331 GNUNET_assert ( num_ctasks == running );
1333 } while (mret == CURLM_CALL_MULTI_PERFORM);
1335 if (mret != CURLM_OK)
1337 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "CURL: %s failed at %s:%d: `%s'\n",
1338 "curl_multi_perform", __FILE__, __LINE__,
1339 curl_multi_strerror (mret));
1341 curl_download_prepare();
1345 * Process LEHO lookup
1347 * @param cls the ctask
1348 * @param rd_count number of records returned
1349 * @param rd record data
1352 process_leho_lookup (void *cls,
1354 const struct GNUNET_NAMESTORE_RecordData *rd)
1356 struct ProxyCurlTask *ctask = cls;
1357 char hosthdr[262]; //256 + "Host: "
1361 struct hostent *phost;
1363 char resolvename[512];
1366 strcpy (ctask->leho, "");
1369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1370 "No LEHO present!\n");
1372 for (i=0; i<rd_count; i++)
1374 if (rd[i].record_type != GNUNET_GNS_RECORD_LEHO)
1377 memcpy (ctask->leho, rd[i].data, rd[i].data_size);
1379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1380 "Found LEHO %s for %s\n", ctask->leho, ctask->url);
1383 if (0 != strcmp (ctask->leho, ""))
1385 sprintf (hosthdr, "%s%s", "Host: ", ctask->leho);
1386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1387 "New HTTP header value: %s\n", hosthdr);
1388 ctask->headers = curl_slist_append (ctask->headers, hosthdr);
1389 GNUNET_assert (NULL != ctask->headers);
1390 ret = curl_easy_setopt (ctask->curl, CURLOPT_HTTPHEADER, ctask->headers);
1391 if (CURLE_OK != ret)
1393 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s failed at %s:%d: `%s'\n",
1394 "curl_easy_setopt", __FILE__, __LINE__, curl_easy_strerror(ret));
1399 if (ctask->mhd->is_ssl)
1401 phost = (struct hostent*)gethostbyname (ctask->host);
1405 ssl_ip = inet_ntoa(*((struct in_addr*)(phost->h_addr)));
1406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1407 "SSL target server: %s\n", ssl_ip);
1408 sprintf (resolvename, "%s:%d:%s", ctask->leho, HTTPS_PORT, ssl_ip);
1409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1410 "Curl resolve: %s\n", resolvename);
1411 ctask->resolver = curl_slist_append ( ctask->resolver, resolvename);
1412 curl_easy_setopt (ctask->curl, CURLOPT_RESOLVE, ctask->resolver);
1413 sprintf (curlurl, "https://%s%s", ctask->leho, ctask->url);
1414 curl_easy_setopt (ctask->curl, CURLOPT_URL, curlurl);
1418 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1419 "gethostbyname failed for %s!\n", ctask->host);
1420 ctask->download_is_finished = GNUNET_YES;
1421 ctask->download_error = GNUNET_YES;
1426 if (CURLM_OK != (mret=curl_multi_add_handle (curl_multi, ctask->curl)))
1428 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1429 "%s failed at %s:%d: `%s'\n",
1430 "curl_multi_add_handle", __FILE__, __LINE__,
1431 curl_multi_strerror (mret));
1432 ctask->download_is_finished = GNUNET_YES;
1433 ctask->download_error = GNUNET_YES;
1436 GNUNET_CONTAINER_DLL_insert (ctasks_head, ctasks_tail, ctask);
1438 curl_download_prepare ();
1443 * Initialize download and trigger curl
1445 * @param cls the proxycurltask
1446 * @param auth_name the name of the authority (site of origin) of ctask->host
1450 process_get_authority (void *cls,
1451 const char* auth_name)
1453 struct ProxyCurlTask *ctask = cls;
1455 if (NULL == auth_name)
1457 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1458 "Get authority failed!\n");
1459 strcpy (ctask->authority, "");
1463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1464 "Get authority yielded %s\n", auth_name);
1465 strcpy (ctask->authority, auth_name);
1468 GNUNET_GNS_lookup_zone (gns_handle,
1471 GNUNET_GNS_RECORD_LEHO,
1472 GNUNET_YES, //Only cached for performance
1474 &process_leho_lookup,
1480 * Main MHD callback for handling requests.
1483 * @param con MHD connection handle
1484 * @param url the url in the request
1485 * @param meth the HTTP method used ("GET", "PUT", etc.)
1486 * @param ver the HTTP version string (i.e. "HTTP/1.1")
1487 * @param upload_data the data being uploaded (excluding HEADERS,
1488 * for a POST that fits into memory and that is encoded
1489 * with a supported encoding, the POST data will NOT be
1490 * given in upload_data and is instead available as
1491 * part of MHD_get_connection_values; very large POST
1492 * data *will* be made available incrementally in
1494 * @param upload_data_size set initially to the size of the
1495 * upload_data provided; the method must update this
1496 * value to the number of bytes NOT processed;
1497 * @param con_cls pointer to location where we store the 'struct Request'
1498 * @return MHD_YES if the connection was handled successfully,
1499 * MHD_NO if the socket must be closed due to a serious
1500 * error while handling the request
1503 create_response (void *cls,
1504 struct MHD_Connection *con,
1508 const char *upload_data,
1509 size_t *upload_data_size,
1512 struct MhdHttpList* hd = cls;
1513 const char* page = "<html><head><title>gnoxy</title>"\
1514 "</head><body>cURL fail</body></html>";
1516 char curlurl[MAX_HTTP_URI_LENGTH]; // buffer overflow!
1519 struct ProxyCurlTask *ctask;
1522 if ((0 != strcasecmp (meth, MHD_HTTP_METHOD_GET)) &&
1523 (0 != strcasecmp (meth, MHD_HTTP_METHOD_PUT)) &&
1524 (0 != strcasecmp (meth, MHD_HTTP_METHOD_POST)))
1526 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1527 "MHD: %s NOT IMPLEMENTED!\n", meth);
1532 if (NULL == *con_cls)
1535 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1536 "Got %s request for %s\n", meth, url);
1537 ctask = GNUNET_malloc (sizeof (struct ProxyCurlTask));
1541 ctask->curl = curl_easy_init();
1542 if (NULL == ctask->curl)
1544 ctask->response = MHD_create_response_from_buffer (strlen (page),
1546 MHD_RESPMEM_PERSISTENT);
1547 ret = MHD_queue_response (con,
1550 MHD_destroy_response (ctask->response);
1551 GNUNET_free (ctask);
1555 ctask->download_in_progress = GNUNET_YES;
1556 ctask->buf_status = BUF_WAIT_FOR_CURL;
1557 ctask->connection = con;
1558 ctask->curl_response_code = MHD_HTTP_OK;
1559 ctask->buffer_read_ptr = ctask->buffer;
1560 ctask->buffer_write_ptr = ctask->buffer;
1561 ctask->pp_task = GNUNET_SCHEDULER_NO_TASK;
1563 MHD_get_connection_values (con,
1565 &con_val_iter, ctask);
1567 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_PUT))
1569 if (0 == *upload_data_size)
1571 curl_easy_cleanup (ctask->curl);
1572 GNUNET_free (ctask);
1575 ctask->put_read_offset = 0;
1576 ctask->put_read_size = *upload_data_size;
1577 curl_easy_setopt (ctask->curl, CURLOPT_UPLOAD, 1);
1578 curl_easy_setopt (ctask->curl, CURLOPT_READDATA, upload_data);
1579 //curl_easy_setopt (ctask->curl, CURLOPT_READFUNCTION, &curl_read_cb);
1581 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1582 "Got PUT data: %s\n", upload_data);
1583 curl_easy_cleanup (ctask->curl);
1584 GNUNET_free (ctask);
1588 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_POST))
1590 if (0 == *upload_data_size)
1592 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1593 "NO data for post!\n");
1594 curl_easy_cleanup (ctask->curl);
1595 GNUNET_free (ctask);
1598 curl_easy_setopt (ctask->curl, CURLOPT_POST, 1);
1599 curl_easy_setopt (ctask->curl, CURLOPT_POSTFIELDSIZE, *upload_data_size);
1600 curl_easy_setopt (ctask->curl, CURLOPT_COPYPOSTFIELDS, upload_data);
1602 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1603 "Got POST data: %s\n", upload_data);
1604 curl_easy_cleanup (ctask->curl);
1605 GNUNET_free (ctask);
1609 curl_easy_setopt (ctask->curl, CURLOPT_HEADERFUNCTION, &curl_check_hdr);
1610 curl_easy_setopt (ctask->curl, CURLOPT_HEADERDATA, ctask);
1611 curl_easy_setopt (ctask->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1612 curl_easy_setopt (ctask->curl, CURLOPT_WRITEDATA, ctask);
1613 curl_easy_setopt (ctask->curl, CURLOPT_FOLLOWLOCATION, 0);
1614 curl_easy_setopt (ctask->curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
1616 if (GNUNET_NO == ctask->mhd->is_ssl)
1618 sprintf (curlurl, "http://%s%s", ctask->host, url);
1619 MHD_get_connection_values (con,
1620 MHD_GET_ARGUMENT_KIND,
1621 &get_uri_val_iter, curlurl);
1622 curl_easy_setopt (ctask->curl, CURLOPT_URL, curlurl);
1624 strcpy (ctask->url, url);
1625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1626 "MHD: Adding new curl task for %s%s\n", ctask->host, url);
1627 MHD_get_connection_values (con,
1628 MHD_GET_ARGUMENT_KIND,
1629 &get_uri_val_iter, ctask->url);
1631 curl_easy_setopt (ctask->curl, CURLOPT_FAILONERROR, 1);
1632 curl_easy_setopt (ctask->curl, CURLOPT_CONNECTTIMEOUT, 600L);
1633 curl_easy_setopt (ctask->curl, CURLOPT_TIMEOUT, 600L);
1635 GNUNET_GNS_get_authority (gns_handle,
1637 &process_get_authority,
1639 ctask->ready_to_queue = GNUNET_NO;
1640 ctask->fin = GNUNET_NO;
1644 ctask = (struct ProxyCurlTask *) *con_cls;
1646 if (GNUNET_YES != ctask->ready_to_queue)
1647 return MHD_YES; /* wait longer */
1649 if (GNUNET_YES == ctask->fin)
1652 ctask->fin = GNUNET_YES;
1653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1654 "MHD: Queueing response for %s\n", ctask->url);
1655 ret = MHD_queue_response (con, ctask->curl_response_code, ctask->response);
1656 run_mhd_now (ctask->mhd);
1667 struct MhdHttpList *hd;
1669 for (hd=mhd_httpd_head; NULL != hd; hd = hd->next)
1677 * @param hd the daemon to run
1680 run_httpd (struct MhdHttpList *hd)
1685 struct GNUNET_NETWORK_FDSet *wrs;
1686 struct GNUNET_NETWORK_FDSet *wws;
1687 struct GNUNET_NETWORK_FDSet *wes;
1690 unsigned MHD_LONG_LONG timeout;
1691 struct GNUNET_TIME_Relative tv;
1696 wrs = GNUNET_NETWORK_fdset_create ();
1697 wes = GNUNET_NETWORK_fdset_create ();
1698 wws = GNUNET_NETWORK_fdset_create ();
1700 GNUNET_assert (MHD_YES == MHD_get_fdset (hd->daemon, &rs, &ws, &es, &max));
1703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1704 "MHD fds: max=%d\n", max);
1706 haveto = MHD_get_timeout (hd->daemon, &timeout);
1708 if (MHD_YES == haveto)
1709 tv.rel_value = (uint64_t) timeout;
1711 tv = GNUNET_TIME_UNIT_FOREVER_REL;
1712 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
1713 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
1714 GNUNET_NETWORK_fdset_copy_native (wes, &es, max + 1);
1716 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1717 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1719 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
1722 GNUNET_NETWORK_fdset_destroy (wrs);
1723 GNUNET_NETWORK_fdset_destroy (wws);
1724 GNUNET_NETWORK_fdset_destroy (wes);
1729 * Task run whenever HTTP server operations are pending.
1732 * @param tc sched context
1735 do_httpd (void *cls,
1736 const struct GNUNET_SCHEDULER_TaskContext *tc)
1738 struct MhdHttpList *hd = cls;
1740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1741 "MHD: Main loop\n");
1742 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1743 MHD_run (hd->daemon);
1750 * Read data from socket
1752 * @param cls the closure
1753 * @param tc scheduler context
1756 do_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1759 * Read from remote end
1761 * @param cls closure
1762 * @param tc scheduler context
1765 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1768 * Write data to remote socket
1770 * @param cls the closure
1771 * @param tc scheduler context
1774 do_write_remote (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1776 struct Socks5Request *s5r = cls;
1779 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
1781 if ((NULL != tc->read_ready) &&
1782 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->remote_sock)) &&
1783 ((len = GNUNET_NETWORK_socket_send (s5r->remote_sock, s5r->rbuf,
1786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1787 "Successfully sent %d bytes to remote socket\n",
1792 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write remote");
1793 if (GNUNET_SCHEDULER_NO_TASK != s5r->rtask)
1794 GNUNET_SCHEDULER_cancel (s5r->rtask);
1795 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
1796 GNUNET_SCHEDULER_cancel (s5r->wtask);
1797 if (GNUNET_SCHEDULER_NO_TASK != s5r->fwdrtask)
1798 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1799 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1800 GNUNET_NETWORK_socket_close (s5r->sock);
1806 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1813 * Clean up s5r handles
1815 * @param s5r the handle to destroy
1818 cleanup_s5r (struct Socks5Request *s5r)
1820 if (GNUNET_SCHEDULER_NO_TASK != s5r->rtask)
1821 GNUNET_SCHEDULER_cancel (s5r->rtask);
1822 if (GNUNET_SCHEDULER_NO_TASK != s5r->fwdwtask)
1823 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
1824 if (GNUNET_SCHEDULER_NO_TASK != s5r->fwdrtask)
1825 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1827 if (NULL != s5r->remote_sock)
1828 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1829 if ((NULL != s5r->sock) && (s5r->cleanup_sock == GNUNET_YES))
1830 GNUNET_NETWORK_socket_close (s5r->sock);
1836 * Write data to socket
1838 * @param cls the closure
1839 * @param tc scheduler context
1842 do_write (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1844 struct Socks5Request *s5r = cls;
1847 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
1849 if ((NULL != tc->read_ready) &&
1850 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->sock)) &&
1851 ((len = GNUNET_NETWORK_socket_send (s5r->sock, s5r->wbuf,
1854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1855 "Successfully sent %d bytes to socket\n",
1861 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write");
1862 s5r->cleanup = GNUNET_YES;
1863 s5r->cleanup_sock = GNUNET_YES;
1869 if (GNUNET_YES == s5r->cleanup)
1875 if ((s5r->state == SOCKS5_DATA_TRANSFER) &&
1876 (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK))
1878 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1880 &do_read_remote, s5r);
1884 * Read from remote end
1886 * @param cls closure
1887 * @param tc scheduler context
1890 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1892 struct Socks5Request *s5r = cls;
1894 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
1897 if ((NULL != tc->write_ready) &&
1898 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->remote_sock)) &&
1899 (s5r->wbuf_len = GNUNET_NETWORK_socket_recv (s5r->remote_sock, s5r->wbuf,
1900 sizeof (s5r->wbuf))))
1902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1903 "Successfully read %d bytes from remote socket\n",
1908 if (s5r->wbuf_len == 0)
1909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1910 "0 bytes received from remote... graceful shutdown!\n");
1911 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
1912 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
1913 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
1914 GNUNET_SCHEDULER_cancel (s5r->rtask);
1916 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1917 s5r->remote_sock = NULL;
1918 GNUNET_NETWORK_socket_close (s5r->sock);
1924 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1932 * Adds a socket to MHD
1934 * @param h the handle to the socket to add
1935 * @param daemon the daemon to add the fd to
1936 * @return whatever MHD_add_connection returns
1939 add_handle_to_mhd (struct GNUNET_NETWORK_Handle *h, struct MHD_Daemon *daemon)
1942 struct sockaddr *addr;
1945 fd = dup (GNUNET_NETWORK_get_fd (h));
1946 addr = GNUNET_NETWORK_get_addr (h);
1947 len = GNUNET_NETWORK_get_addrlen (h);
1949 return MHD_add_connection (daemon, fd, addr, len);
1953 * Read file in filename
1955 * @param filename file to read
1956 * @param size pointer where filesize is stored
1960 load_file (const char* filename,
1967 GNUNET_DISK_file_size (filename, &fsize,
1968 GNUNET_YES, GNUNET_YES))
1970 if (fsize > MAX_PEM_SIZE)
1972 *size = (unsigned int) fsize;
1973 buffer = GNUNET_malloc (*size);
1974 if (fsize != GNUNET_DISK_fn_read (filename, buffer, (size_t) fsize))
1976 GNUNET_free (buffer);
1984 * Load PEM key from file
1986 * @param key where to store the data
1987 * @param keyfile path to the PEM file
1988 * @return GNUNET_OK on success
1991 load_key_from_file (gnutls_x509_privkey_t key, const char* keyfile)
1993 gnutls_datum_t key_data;
1996 key_data.data = (unsigned char*) load_file (keyfile, &key_data.size);
1997 ret = gnutls_x509_privkey_import (key, &key_data,
1998 GNUTLS_X509_FMT_PEM);
1999 if (GNUTLS_E_SUCCESS != ret)
2001 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2002 _("Unable to import private key from file `%s'\n"),
2006 GNUNET_free (key_data.data);
2007 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
2012 * Load cert from file
2014 * @param crt struct to store data in
2015 * @param certfile path to pem file
2016 * @return GNUNET_OK on success
2019 load_cert_from_file (gnutls_x509_crt_t crt, char* certfile)
2021 gnutls_datum_t cert_data;
2022 cert_data.data = NULL;
2025 cert_data.data = (unsigned char*) load_file (certfile, &cert_data.size);
2026 ret = gnutls_x509_crt_import (crt, &cert_data,
2027 GNUTLS_X509_FMT_PEM);
2028 if (GNUTLS_E_SUCCESS != ret)
2030 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2031 _("Unable to import certificate %s\n"), certfile);
2034 GNUNET_free (cert_data.data);
2035 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
2040 * Generate new certificate for specific name
2042 * @param name the subject name to generate a cert for
2043 * @return a struct holding the PEM data
2045 static struct ProxyGNSCertificate *
2046 generate_gns_certificate (const char *name)
2050 unsigned int serial;
2051 size_t key_buf_size;
2052 size_t cert_buf_size;
2053 gnutls_x509_crt_t request;
2057 ret = gnutls_x509_crt_init (&request);
2059 if (GNUTLS_E_SUCCESS != ret)
2064 ret = gnutls_x509_crt_set_key (request, proxy_ca.key);
2066 if (GNUTLS_E_SUCCESS != ret)
2071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Generating cert\n");
2073 struct ProxyGNSCertificate *pgc =
2074 GNUNET_malloc (sizeof (struct ProxyGNSCertificate));
2076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding DNs\n");
2078 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COUNTRY_NAME,
2081 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_ORGANIZATION_NAME,
2084 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COMMON_NAME,
2085 0, name, strlen (name));
2087 ret = gnutls_x509_crt_set_version (request, 3);
2089 ret = gnutls_rnd (GNUTLS_RND_NONCE, &serial, sizeof (serial));
2091 etime = time (NULL);
2092 tm_data = localtime (&etime);
2095 ret = gnutls_x509_crt_set_serial (request,
2099 ret = gnutls_x509_crt_set_activation_time (request,
2102 etime = mktime (tm_data);
2109 ret = gnutls_x509_crt_set_expiration_time (request,
2111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Signing...\n");
2113 ret = gnutls_x509_crt_sign (request, proxy_ca.cert, proxy_ca.key);
2115 key_buf_size = sizeof (pgc->key);
2116 cert_buf_size = sizeof (pgc->cert);
2118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Exporting certificate...\n");
2120 gnutls_x509_crt_export (request, GNUTLS_X509_FMT_PEM,
2121 pgc->cert, &cert_buf_size);
2123 gnutls_x509_privkey_export (proxy_ca.key, GNUTLS_X509_FMT_PEM,
2124 pgc->key, &key_buf_size);
2127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up\n");
2128 gnutls_x509_crt_deinit (request);
2136 * Accept policy for mhdaemons
2139 * @param addr the sockaddr
2140 * @param addrlen the sockaddr length
2141 * @return MHD_NO if sockaddr is wrong or #conns too high
2144 accept_cb (void* cls, const struct sockaddr *addr, socklen_t addrlen)
2146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2147 "In MHD accept policy cb\n");
2151 if (addr->sa_family == AF_UNIX)
2155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2156 "Connection accepted\n");
2163 * Adds a socket to an SSL MHD instance
2164 * It is important the the domain name is
2165 * correct. In most cases we need to start a new daemon
2167 * @param h the handle to add to a daemon
2168 * @param domain the domain the ssl daemon has to serve
2169 * @return MHD_YES on success
2172 add_handle_to_ssl_mhd (struct GNUNET_NETWORK_Handle *h, const char* domain)
2174 struct MhdHttpList *hd = NULL;
2175 struct ProxyGNSCertificate *pgc;
2176 struct NetworkHandleList *nh;
2178 for (hd = mhd_httpd_head; NULL != hd; hd = hd->next)
2179 if (0 == strcmp (hd->domain, domain))
2184 pgc = generate_gns_certificate (domain);
2186 hd = GNUNET_malloc (sizeof (struct MhdHttpList));
2187 hd->is_ssl = GNUNET_YES;
2188 strcpy (hd->domain, domain);
2189 hd->proxy_cert = pgc;
2192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2193 "No previous SSL instance found... starting new one for %s\n",
2196 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_SSL, 4444,
2198 &create_response, hd,
2199 MHD_OPTION_LISTEN_SOCKET, GNUNET_NETWORK_get_fd (mhd_unix_socket),
2200 MHD_OPTION_CONNECTION_LIMIT, MHD_MAX_CONNECTIONS,
2201 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
2202 MHD_OPTION_NOTIFY_COMPLETED,
2204 MHD_OPTION_HTTPS_MEM_KEY, pgc->key,
2205 MHD_OPTION_HTTPS_MEM_CERT, pgc->cert,
2208 GNUNET_assert (hd->daemon != NULL);
2209 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
2211 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
2214 nh = GNUNET_malloc (sizeof (struct NetworkHandleList));
2217 GNUNET_CONTAINER_DLL_insert (hd->socket_handles_head,
2218 hd->socket_handles_tail,
2221 return add_handle_to_mhd (h, hd->daemon);
2227 * Read data from incoming connection
2229 * @param cls the closure
2230 * @param tc the scheduler context
2233 do_read (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2235 struct Socks5Request *s5r = cls;
2236 struct socks5_client_hello *c_hello;
2237 struct socks5_server_hello *s_hello;
2238 struct socks5_client_request *c_req;
2239 struct socks5_server_response *s_resp;
2245 struct hostent *phost;
2247 struct sockaddr_in remote_addr;
2248 struct in_addr *r_sin_addr;
2250 struct NetworkHandleList *nh;
2252 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2254 if ((NULL != tc->write_ready) &&
2255 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) &&
2256 (s5r->rbuf_len = GNUNET_NETWORK_socket_recv (s5r->sock, s5r->rbuf,
2257 sizeof (s5r->rbuf))))
2259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2260 "Successfully read %d bytes from socket\n",
2265 if (s5r->rbuf_len != 0)
2266 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "read");
2268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disco!\n");
2270 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
2271 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
2272 if (s5r->wtask != GNUNET_SCHEDULER_NO_TASK)
2273 GNUNET_SCHEDULER_cancel (s5r->wtask);
2274 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
2275 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
2276 GNUNET_NETWORK_socket_close (s5r->remote_sock);
2277 GNUNET_NETWORK_socket_close (s5r->sock);
2282 if (s5r->state == SOCKS5_INIT)
2284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2286 c_hello = (struct socks5_client_hello*)&s5r->rbuf;
2288 GNUNET_assert (c_hello->version == SOCKS_VERSION_5);
2290 s_hello = (struct socks5_server_hello*)&s5r->wbuf;
2291 s5r->wbuf_len = sizeof( struct socks5_server_hello );
2293 s_hello->version = c_hello->version;
2294 s_hello->auth_method = SOCKS_AUTH_NONE;
2296 /* Write response to client */
2297 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2301 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2305 s5r->state = SOCKS5_REQUEST;
2309 if (s5r->state == SOCKS5_REQUEST)
2311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2312 "Processing SOCKS5 request\n");
2313 c_req = (struct socks5_client_request*)&s5r->rbuf;
2314 s_resp = (struct socks5_server_response*)&s5r->wbuf;
2315 //Only 10byte for ipv4 response!
2316 s5r->wbuf_len = 10;//sizeof (struct socks5_server_response);
2318 GNUNET_assert (c_req->addr_type == 3);
2320 dom_len = *((uint8_t*)(&(c_req->addr_type) + 1));
2321 memset(domain, 0, sizeof(domain));
2322 strncpy(domain, (char*)(&(c_req->addr_type) + 2), dom_len);
2323 req_port = *((uint16_t*)(&(c_req->addr_type) + 2 + dom_len));
2325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2326 "Requested connection is %s:%d\n",
2330 if (is_tld (domain, GNUNET_GNS_TLD) ||
2331 is_tld (domain, GNUNET_GNS_TLD_ZKEY))
2333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2334 "Requested connection is gnunet tld\n",
2338 if (ntohs(req_port) == HTTPS_PORT)
2340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2341 "Requested connection is HTTPS\n");
2342 ret = add_handle_to_ssl_mhd ( s5r->sock, domain );
2344 else if (NULL != httpd)
2346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2347 "Requested connection is HTTP\n");
2348 nh = GNUNET_malloc (sizeof (struct NetworkHandleList));
2351 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head->socket_handles_head,
2352 mhd_httpd_head->socket_handles_tail,
2355 ret = add_handle_to_mhd ( s5r->sock, httpd );
2360 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2361 _("Failed to start HTTP server\n"));
2362 s_resp->version = 0x05;
2363 s_resp->reply = 0x01;
2364 s5r->cleanup = GNUNET_YES;
2365 s5r->cleanup_sock = GNUNET_YES;
2367 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2373 /* Signal success */
2374 s_resp->version = 0x05;
2375 s_resp->reply = 0x00;
2376 s_resp->reserved = 0x00;
2377 s_resp->addr_type = 0x01;
2379 s5r->cleanup = GNUNET_YES;
2380 s5r->cleanup_sock = GNUNET_NO;
2382 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2390 phost = (struct hostent*)gethostbyname (domain);
2393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2394 "Resolve %s error!\n", domain );
2395 s_resp->version = 0x05;
2396 s_resp->reply = 0x01;
2397 s5r->cleanup = GNUNET_YES;
2398 s5r->cleanup_sock = GNUNET_YES;
2400 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2406 s5r->remote_sock = GNUNET_NETWORK_socket_create (AF_INET,
2409 r_sin_addr = (struct in_addr*)(phost->h_addr);
2410 remote_ip = r_sin_addr->s_addr;
2411 memset(&remote_addr, 0, sizeof(remote_addr));
2412 remote_addr.sin_family = AF_INET;
2413 #if HAVE_SOCKADDR_IN_SIN_LEN
2414 remote_addr.sin_len = sizeof (remote_addr);
2416 remote_addr.sin_addr.s_addr = remote_ip;
2417 remote_addr.sin_port = req_port;
2419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2420 "target server: %s:%u\n", inet_ntoa(remote_addr.sin_addr),
2424 GNUNET_NETWORK_socket_connect ( s5r->remote_sock,
2425 (const struct sockaddr*)&remote_addr,
2426 sizeof (remote_addr)))
2427 && (errno != EINPROGRESS))
2429 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "connect");
2430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2431 "socket request error...\n");
2432 s_resp->version = 0x05;
2433 s_resp->reply = 0x01;
2435 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2443 "new remote connection\n");
2445 s_resp->version = 0x05;
2446 s_resp->reply = 0x00;
2447 s_resp->reserved = 0x00;
2448 s_resp->addr_type = 0x01;
2450 s5r->state = SOCKS5_DATA_TRANSFER;
2453 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2457 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2465 if (s5r->state == SOCKS5_DATA_TRANSFER)
2467 if ((s5r->remote_sock == NULL) || (s5r->rbuf_len == 0))
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 "Closing connection to client\n");
2471 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
2472 GNUNET_SCHEDULER_cancel (s5r->rtask);
2473 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
2474 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
2475 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
2476 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
2477 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
2478 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
2480 if (s5r->remote_sock != NULL)
2481 GNUNET_NETWORK_socket_close (s5r->remote_sock);
2482 GNUNET_NETWORK_socket_close (s5r->sock);
2487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2488 "forwarding %d bytes from client\n", s5r->rbuf_len);
2491 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2493 &do_write_remote, s5r);
2495 if (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK)
2498 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2500 &do_read_remote, s5r);
2510 * Accept new incoming connections
2512 * @param cls the closure
2513 * @param tc the scheduler context
2516 do_accept (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2518 struct GNUNET_NETWORK_Handle *s;
2519 struct Socks5Request *s5r;
2521 ltask = GNUNET_SCHEDULER_NO_TASK;
2522 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2525 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2529 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
2533 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "accept");
2537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2538 "Got an inbound connection, waiting for data\n");
2540 s5r = GNUNET_malloc (sizeof (struct Socks5Request));
2542 s5r->state = SOCKS5_INIT;
2543 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
2544 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
2545 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
2546 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2553 * Task run on shutdown
2555 * @param cls closure
2556 * @param tc task context
2559 do_shutdown (void *cls,
2560 const struct GNUNET_SCHEDULER_TaskContext *tc)
2563 struct MhdHttpList *hd;
2564 struct MhdHttpList *tmp_hd;
2565 struct NetworkHandleList *nh;
2566 struct NetworkHandleList *tmp_nh;
2567 struct ProxyCurlTask *ctask;
2568 struct ProxyCurlTask *ctask_tmp;
2570 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2571 "Shutting down...\n");
2573 gnutls_global_deinit ();
2575 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
2577 GNUNET_SCHEDULER_cancel (curl_download_task);
2578 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
2581 for (hd = mhd_httpd_head; hd != NULL; hd = tmp_hd)
2585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2586 "Stopping daemon\n");
2588 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
2590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2591 "Stopping select task %d\n",
2593 GNUNET_SCHEDULER_cancel (hd->httpd_task);
2594 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
2597 if (NULL != hd->daemon)
2599 MHD_stop_daemon (hd->daemon);
2603 for (nh = hd->socket_handles_head; nh != NULL; nh = tmp_nh)
2607 GNUNET_NETWORK_socket_close (nh->h);
2612 if (NULL != hd->proxy_cert)
2614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2615 "Free certificate\n");
2616 GNUNET_free (hd->proxy_cert);
2622 for (ctask=ctasks_head; ctask != NULL; ctask=ctask_tmp)
2624 ctask_tmp = ctask->next;
2626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2627 "Cleaning up cURL task\n");
2629 if (ctask->curl != NULL)
2630 curl_easy_cleanup (ctask->curl);
2632 if (NULL != ctask->headers)
2633 curl_slist_free_all (ctask->headers);
2634 if (NULL != ctask->resolver)
2635 curl_slist_free_all (ctask->resolver);
2637 if (NULL != ctask->response)
2638 MHD_destroy_response (ctask->response);
2641 GNUNET_free (ctask);
2643 curl_multi_cleanup (curl_multi);
2645 GNUNET_GNS_disconnect (gns_handle);
2650 * Compiles a regex for us
2652 * @param re ptr to re struct
2653 * @param rt the expression to compile
2654 * @return 0 on success
2657 compile_regex (regex_t *re, const char* rt)
2662 status = regcomp (re, rt, REG_EXTENDED|REG_NEWLINE);
2665 regerror (status, re, err, 1024);
2666 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2667 "Regex error compiling '%s': %s\n", rt, err);
2675 * Loads the users local zone key
2677 * @return GNUNET_YES on success
2680 load_local_zone_key (const struct GNUNET_CONFIGURATION_Handle *cfg)
2683 struct GNUNET_CRYPTO_RsaPrivateKey *key = NULL;
2684 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
2685 struct GNUNET_CRYPTO_ShortHashCode *zone = NULL;
2686 struct GNUNET_CRYPTO_ShortHashAsciiEncoded zonename;
2688 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
2689 "ZONEKEY", &keyfile))
2691 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2692 "Unable to load zone key config value!\n");
2696 if (GNUNET_NO == GNUNET_DISK_file_test (keyfile))
2698 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2699 "Unable to load zone key %s!\n", keyfile);
2700 GNUNET_free(keyfile);
2704 key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2705 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
2706 GNUNET_CRYPTO_short_hash(&pkey,
2707 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2709 zone = &local_gns_zone;
2710 GNUNET_CRYPTO_short_hash_to_enc (zone, &zonename);
2711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2712 "Using zone: %s!\n", &zonename);
2713 GNUNET_CRYPTO_rsa_key_free(key);
2714 GNUNET_free(keyfile);
2716 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
2717 "PRIVATE_ZONEKEY", &keyfile))
2719 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2720 "Unable to load private zone key config value!\n");
2724 if (GNUNET_NO == GNUNET_DISK_file_test (keyfile))
2726 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2727 "Unable to load private zone key %s!\n", keyfile);
2728 GNUNET_free(keyfile);
2732 key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2733 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
2734 GNUNET_CRYPTO_short_hash(&pkey,
2735 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2736 &local_private_zone);
2737 GNUNET_CRYPTO_short_hash_to_enc (zone, &zonename);
2738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2739 "Using private zone: %s!\n", &zonename);
2740 GNUNET_CRYPTO_rsa_key_free(key);
2741 GNUNET_free(keyfile);
2743 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
2744 "SHORTEN_ZONEKEY", &keyfile))
2746 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2747 "Unable to load shorten zone key config value!\n");
2751 if (GNUNET_NO == GNUNET_DISK_file_test (keyfile))
2753 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2754 "Unable to load shorten zone key %s!\n", keyfile);
2755 GNUNET_free(keyfile);
2759 key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2760 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
2761 GNUNET_CRYPTO_short_hash(&pkey,
2762 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2763 &local_shorten_zone);
2764 GNUNET_CRYPTO_short_hash_to_enc (zone, &zonename);
2765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2766 "Using shorten zone: %s!\n", &zonename);
2767 GNUNET_CRYPTO_rsa_key_free(key);
2768 GNUNET_free(keyfile);
2774 * Main function that will be run
2776 * @param cls closure
2777 * @param args remaining command-line arguments
2778 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
2779 * @param cfg configuration
2782 run (void *cls, char *const *args, const char *cfgfile,
2783 const struct GNUNET_CONFIGURATION_Handle *cfg)
2785 struct sockaddr_in sa;
2786 struct MhdHttpList *hd;
2787 struct sockaddr_un mhd_unix_sock_addr;
2789 char* proxy_sockfile;
2790 char* cafile_cfg = NULL;
2793 curl_multi = curl_multi_init ();
2795 if (NULL == curl_multi)
2797 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2798 "Failed to create cURL multo handle!\n");
2802 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2804 cafile = cafile_opt;
2807 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
2811 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2812 "Unable to load proxy CA config value!\n");
2813 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2814 "No proxy CA provided!\n");
2817 cafile = cafile_cfg;
2820 gnutls_global_init ();
2821 gnutls_x509_crt_init (&proxy_ca.cert);
2822 gnutls_x509_privkey_init (&proxy_ca.key);
2824 if ( (GNUNET_OK != load_cert_from_file (proxy_ca.cert, cafile)) ||
2825 (GNUNET_OK != load_key_from_file (proxy_ca.key, cafile)) )
2827 // FIXME: release resources...
2831 GNUNET_free_non_null (cafile_cfg);
2833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2834 "Loading Template\n");
2836 compile_regex (&re_dotplus, (char*) RE_A_HREF);
2838 gns_handle = GNUNET_GNS_connect (cfg);
2840 if (GNUNET_NO == load_local_zone_key (cfg))
2842 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2843 "Unable to load zone!\n");
2847 if (NULL == gns_handle)
2849 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2850 "Unable to connect to GNS!\n");
2854 memset (&sa, 0, sizeof (sa));
2855 sa.sin_family = AF_INET;
2856 sa.sin_port = htons (port);
2857 #if HAVE_SOCKADDR_IN_SIN_LEN
2858 sa.sin_len = sizeof (sa);
2861 lsock = GNUNET_NETWORK_socket_create (AF_INET,
2865 if ((NULL == lsock) ||
2867 GNUNET_NETWORK_socket_bind (lsock, (const struct sockaddr *) &sa,
2870 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2871 "Failed to create listen socket bound to `%s'",
2872 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
2874 GNUNET_NETWORK_socket_close (lsock);
2878 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
2880 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2881 "Failed to listen on socket bound to `%s'",
2882 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
2886 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2887 lsock, &do_accept, NULL);
2892 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
2894 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2895 "cURL global init failed!\n");
2899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2900 "Proxy listens on port %u\n",
2903 mhd_httpd_head = NULL;
2904 mhd_httpd_tail = NULL;
2905 total_mhd_connections = 0;
2907 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
2911 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2912 "Specify PROXY_UNIXPATH in gns-proxy config section!\n");
2916 mhd_unix_socket = GNUNET_NETWORK_socket_create (AF_UNIX,
2920 if (NULL == mhd_unix_socket)
2922 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2923 "Unable to create unix domain socket!\n");
2927 mhd_unix_sock_addr.sun_family = AF_UNIX;
2928 strcpy (mhd_unix_sock_addr.sun_path, proxy_sockfile);
2931 mhd_unix_sock_addr.sun_path[0] = '\0';
2933 #if HAVE_SOCKADDR_IN_SIN_LEN
2934 mhd_unix_sock_addr.sun_len = (u_char) sizeof (struct sockaddr_un);
2937 len = strlen (proxy_sockfile) + sizeof(AF_UNIX);
2939 GNUNET_free (proxy_sockfile);
2941 if (GNUNET_OK != GNUNET_NETWORK_socket_bind (mhd_unix_socket,
2942 (struct sockaddr*)&mhd_unix_sock_addr,
2945 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2946 "Unable to bind unix domain socket!\n");
2950 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (mhd_unix_socket,
2953 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2954 "Unable to listen on unix domain socket!\n");
2958 hd = GNUNET_malloc (sizeof (struct MhdHttpList));
2959 hd->is_ssl = GNUNET_NO;
2960 strcpy (hd->domain, "");
2961 httpd = MHD_start_daemon (MHD_USE_DEBUG, 4444, //Dummy port
2963 &create_response, hd,
2964 MHD_OPTION_LISTEN_SOCKET, GNUNET_NETWORK_get_fd (mhd_unix_socket),
2965 MHD_OPTION_CONNECTION_LIMIT, MHD_MAX_CONNECTIONS,
2966 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
2967 MHD_OPTION_NOTIFY_COMPLETED,
2971 GNUNET_assert (httpd != NULL);
2973 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
2975 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
2979 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2980 &do_shutdown, NULL);
2986 * The main function for gnunet-gns-proxy.
2988 * @param argc number of arguments from the command line
2989 * @param argv command line arguments
2990 * @return 0 ok, 1 on error
2993 main (int argc, char *const *argv)
2995 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
2997 gettext_noop ("listen on specified port"), 1,
2998 &GNUNET_GETOPT_set_string, &port},
2999 {'a', "authority", NULL,
3000 gettext_noop ("pem file to use as CA"), 1,
3001 &GNUNET_GETOPT_set_string, &cafile_opt},
3002 GNUNET_GETOPT_OPTION_END
3007 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
3011 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
3014 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
3015 _("GNUnet GNS proxy"),
3017 &run, NULL)) ? 0 : 1;
3018 GNUNET_free_non_null ((char*)argv);