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
40 #define POSTBUFFERSIZE 4096
42 /* MHD/cURL defines */
43 #define BUF_WAIT_FOR_CURL 0
44 #define BUF_WAIT_FOR_MHD 1
45 #define BUF_WAIT_FOR_PP 2
46 #define HTML_HDR_CONTENT "Content-Type: text/html"
48 /* buffer padding for proper RE matching */
49 #define CURL_BUF_PADDING 1000
52 //#define RE_DOTPLUS "<a href=\"http://(([A-Za-z]+[.])+)([+])"
53 #define RE_A_HREF "href=\"https?://(([A-Za-z0-9]+[.])+)([+]|[a-z]+)"
54 #define RE_N_MATCHES 4
56 /* The usual suspects */
58 #define HTTPS_PORT 443
62 * A structure for CA cert/key
67 gnutls_x509_crt_t cert;
70 gnutls_x509_privkey_t key;
73 #define MAX_PEM_SIZE (10 * 1024)
76 * Structure for GNS certificates
78 struct ProxyGNSCertificate
80 /* The certificate as PEM */
81 char cert[MAX_PEM_SIZE];
83 /* The private key as PEM */
84 char key[MAX_PEM_SIZE];
89 * A structure for socks requests
93 /* The client socket */
94 struct GNUNET_NETWORK_Handle *sock;
96 /* The server socket */
97 struct GNUNET_NETWORK_Handle *remote_sock;
102 /* Client socket read task */
103 GNUNET_SCHEDULER_TaskIdentifier rtask;
105 /* Server socket read task */
106 GNUNET_SCHEDULER_TaskIdentifier fwdrtask;
108 /* Client socket write task */
109 GNUNET_SCHEDULER_TaskIdentifier wtask;
111 /* Server socket write task */
112 GNUNET_SCHEDULER_TaskIdentifier fwdwtask;
120 /* Length of data in read buffer */
121 unsigned int rbuf_len;
123 /* Length of data in write buffer */
124 unsigned int wbuf_len;
126 /* This handle is scheduled for cleanup? */
129 /* Shall we close the client socket on cleanup? */
134 * DLL for Network Handles
136 struct NetworkHandleList
139 struct NetworkHandleList *next;
142 struct NetworkHandleList *prev;
145 struct GNUNET_NETWORK_Handle *h;
149 * A structure for all running Httpds
154 struct MhdHttpList *prev;
157 struct MhdHttpList *next;
159 /* is this an ssl daemon? */
162 /* the domain name to server (only important for SSL) */
165 /* The daemon handle */
166 struct MHD_Daemon *daemon;
168 /* Optional proxy certificate used */
169 struct ProxyGNSCertificate *proxy_cert;
172 GNUNET_SCHEDULER_TaskIdentifier httpd_task;
174 /* Handles associated with this daemon */
175 struct NetworkHandleList *socket_handles_head;
177 /* Handles associated with this daemon */
178 struct NetworkHandleList *socket_handles_tail;
182 * A structure for MHD<->cURL streams
187 struct ProxyCurlTask *prev;
190 struct ProxyCurlTask *next;
195 /* Optional header replacements for curl (LEHO) */
196 struct curl_slist *headers;
198 /* Optional resolver replacements for curl (LEHO) */
199 struct curl_slist *resolver;
201 /* curl response code */
202 long curl_response_code;
204 /* The URL to fetch */
205 char url[MAX_HTTP_URI_LENGTH];
207 /* The cURL write buffer / MHD read buffer */
208 char buffer[CURL_MAX_WRITE_SIZE + CURL_BUF_PADDING];
210 /* Read pos of the data in the buffer */
211 char *buffer_read_ptr;
213 /* Write pos in the buffer */
214 char *buffer_write_ptr;
216 /* The buffer status (BUF_WAIT_FOR_CURL or BUF_WAIT_FOR_MHD) */
219 /* Number of bytes in buffer */
220 unsigned int bytes_in_buffer;
222 /* Indicates wheather the download is in progress */
223 int download_in_progress;
225 /* Indicates wheather the download was successful */
226 int download_is_finished;
228 /* Indicates wheather the download failed */
231 /* Indicates wheather we need to parse HTML */
234 /* Indicates wheather we are postprocessing the HTML right now */
235 int is_postprocessing;
237 /* Indicates wheather postprocessing has finished */
241 GNUNET_SCHEDULER_TaskIdentifier pp_task;
244 struct ProxyREMatch *pp_match_head;
247 struct ProxyREMatch *pp_match_tail;
249 /* The authority of the corresponding host (site of origin) */
252 /* The hostname (Host header field) */
255 /* The LEgacy HOstname (can be empty) */
258 /* The associated daemon list entry */
259 struct MhdHttpList *mhd;
261 /* The associated response */
262 struct MHD_Response *response;
265 struct ProxySetCookieHeader *set_cookies_head;
268 struct ProxySetCookieHeader *set_cookies_tail;
270 /* connection status */
277 struct MHD_Connection *connection;
280 size_t put_read_offset;
281 size_t put_read_size;
284 struct MHD_PostProcessor *post_handler;
287 struct ProxyPostData *post_data_head;
288 struct ProxyPostData *post_data_tail;
293 * Struct for RE matches in postprocessing of HTML
298 struct ProxyREMatch *next;
301 struct ProxyREMatch *prev;
310 struct GNUNET_GNS_ShortenRequest *shorten_task;
315 /* start of match in buffer */
318 /* end of match in buffer */
321 /* associated proxycurltask */
322 struct ProxyCurlTask *ctask;
326 * Struct for set-cookies
328 struct ProxySetCookieHeader
331 struct ProxySetCookieHeader *next;
334 struct ProxySetCookieHeader *prev;
341 * Post data structure
346 struct ProxyPostData *next;
349 struct ProxyPostData *prev;
359 /* The port the proxy is running on (default 7777) */
360 static unsigned long port = GNUNET_GNS_PROXY_PORT;
362 /* The CA file (pem) to use for the proxy CA */
363 static char* cafile_opt;
365 /* The listen socket of the proxy */
366 static struct GNUNET_NETWORK_Handle *lsock;
368 /* The listen task ID */
369 GNUNET_SCHEDULER_TaskIdentifier ltask;
371 /* The cURL download task */
372 GNUNET_SCHEDULER_TaskIdentifier curl_download_task;
374 /* The non SSL httpd daemon handle */
375 static struct MHD_Daemon *httpd;
377 /* Number of current mhd connections */
378 static unsigned int total_mhd_connections;
380 /* The cURL multi handle */
381 static CURLM *curl_multi;
383 /* Handle to the GNS service */
384 static struct GNUNET_GNS_Handle *gns_handle;
386 /* DLL for ProxyCurlTasks */
387 static struct ProxyCurlTask *ctasks_head;
389 /* DLL for ProxyCurlTasks */
390 static struct ProxyCurlTask *ctasks_tail;
392 /* DLL for http daemons */
393 static struct MhdHttpList *mhd_httpd_head;
395 /* DLL for http daemons */
396 static struct MhdHttpList *mhd_httpd_tail;
398 /* Handle to the regex for dotplus (.+) replacement in HTML */
399 static regex_t re_dotplus;
401 /* The users local GNS zone hash */
402 static struct GNUNET_CRYPTO_ShortHashCode local_gns_zone;
404 /* The users local private zone */
405 static struct GNUNET_CRYPTO_ShortHashCode local_private_zone;
407 /* The users local shorten zone */
408 static struct GNUNET_CRYPTO_ShortHashCode local_shorten_zone;
410 /* The CA for SSL certificate generation */
411 static struct ProxyCA proxy_ca;
413 /* UNIX domain socket for mhd */
414 struct GNUNET_NETWORK_Handle *mhd_unix_socket;
416 /* Shorten zone private key */
417 struct GNUNET_CRYPTO_RsaPrivateKey *shorten_zonekey;
420 * Checks if name is in tld
422 * @param name the name to check
423 * @param tld the TLD to check for
424 * @return GNUNET_YES or GNUNET_NO
427 is_tld(const char* name, const char* tld)
431 if (strlen(name) <= strlen(tld))
434 offset = strlen(name) - strlen(tld);
435 if (0 != strcmp (name+offset, tld))
437 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
438 "%s is not in .%s TLD\n", name, tld);
446 * convert integer to string representation
449 * @return the character
451 char i_to_hexchar (char i)
453 static char hexmap[] = "0123456789abcdef";
454 GNUNET_assert (sizeof (hexmap) > (i & 15));
455 return hexmap[i & 15];
459 * Escape giben 0-terminated string
461 * @param to_esc string to escapse
462 * @return allocated new escaped string (MUST free!)
465 escape_to_urlenc (const char *to_esc)
467 char *pos = (char*)to_esc;
468 char *res = GNUNET_malloc (strlen (to_esc) * 3 + 1);
473 if (isalnum (*pos) ||
474 ('-' == *pos) || ('_' == *pos) ||
475 ('.' == *pos) || ('~' == *pos))
477 else if (' ' == *pos)
482 *rpos++ = i_to_hexchar (*pos >> 4);
483 *rpos++ = i_to_hexchar (*pos >> 15);
492 con_post_data_iter (void *cls,
493 enum MHD_ValueKind kind,
495 const char *filename,
496 const char *content_type,
497 const char *transfer_encoding,
502 struct ProxyCurlTask* ctask = cls;
503 struct ProxyPostData* pdata;
505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
506 "Got POST data: '%s : %s' at offset %llu size %lld\n",
507 key, data, off, size);
509 /* FIXME ! if transfer enc == urlenc! */
511 pdata = GNUNET_malloc (sizeof (struct ProxyPostData));
512 pdata->key = escape_to_urlenc (key);
513 pdata->value = escape_to_urlenc (data);
515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
516 "Escaped POST data: '%s : %s'\n",
517 pdata->key, pdata->value);
519 GNUNET_CONTAINER_DLL_insert_tail (ctask->post_data_head,
520 ctask->post_data_tail,
528 get_uri_val_iter (void *cls,
529 enum MHD_ValueKind kind,
535 if (strlen (buf) + strlen (value) + 3 > MAX_HTTP_URI_LENGTH)
537 sprintf (buf+strlen (buf), "?%s=%s", key, value);
543 * Read HTTP request header field 'Host'
545 * @param cls buffer to write to
546 * @param kind value kind
547 * @param key field key
548 * @param value field value
549 * @return MHD_NO when Host found
552 con_val_iter (void *cls,
553 enum MHD_ValueKind kind,
557 struct ProxyCurlTask *ctask = cls;
558 char* buf = ctask->host;
562 if (0 == strcmp ("Host", key))
568 if (0 == strcmp ("Accept-Encoding", key))
573 cstr = GNUNET_malloc (strlen (key) + strlen (hdr_val) + 3);
574 GNUNET_snprintf (cstr, strlen (key) + strlen (hdr_val) + 3,
575 "%s: %s", key, hdr_val);
577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
578 "Client Header: %s\n", cstr);
580 ctask->headers = curl_slist_append (ctask->headers, cstr);
588 * Callback for MHD response
591 * @param pos in buffer
593 * @param max space in buffer
594 * @return number of bytes written
597 mhd_content_cb (void *cls,
603 * Check HTTP response header for mime
605 * @param buffer curl buffer
606 * @param size curl blocksize
607 * @param nmemb curl blocknumber
609 * @return size of read bytes
612 curl_check_hdr (void *buffer, size_t size, size_t nmemb, void *cls)
614 size_t bytes = size * nmemb;
615 struct ProxyCurlTask *ctask = cls;
616 int html_mime_len = strlen (HTML_HDR_CONTENT);
617 int cookie_hdr_len = strlen (MHD_HTTP_HEADER_SET_COOKIE);
618 char hdr_mime[html_mime_len+1];
619 char hdr_generic[bytes+1];
620 char new_cookie_hdr[bytes+strlen (ctask->leho)+1];
629 if (NULL == ctask->response)
631 /* FIXME: get total size from curl (if available) */
632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
633 "Creating response for %s\n", ctask->url);
634 ctask->response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
635 sizeof (ctask->buffer),
639 ctask->ready_to_queue = GNUNET_YES;
643 if (html_mime_len <= bytes)
645 memcpy (hdr_mime, buffer, html_mime_len);
646 hdr_mime[html_mime_len] = '\0';
648 if (0 == strcmp (hdr_mime, HTML_HDR_CONTENT))
650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
651 "Got HTML HTTP response header\n");
652 ctask->parse_content = GNUNET_YES;
656 if (cookie_hdr_len > bytes)
659 memcpy (hdr_generic, buffer, bytes);
660 hdr_generic[bytes] = '\0';
662 if ('\n' == hdr_generic[bytes-1])
663 hdr_generic[bytes-1] = '\0';
665 if (hdr_generic[bytes-2] == '\r')
666 hdr_generic[bytes-2] = '\0';
668 if (0 == memcmp (hdr_generic,
669 MHD_HTTP_HEADER_SET_COOKIE,
672 ndup = GNUNET_strdup (hdr_generic+cookie_hdr_len+1);
673 memset (new_cookie_hdr, 0, sizeof (new_cookie_hdr));
674 tok = strtok (ndup, ";");
676 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
677 "Looking for cookie in : %s\n", hdr_generic);
679 for (; tok != NULL; tok = strtok (NULL, ";"))
681 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
682 "Got Cookie token: %s\n", tok);
683 //memcpy (new_cookie_hdr+offset, tok, strlen (tok));
684 if (0 == memcmp (tok, " domain", strlen (" domain")))
686 cookie_domain = tok + strlen (" domain") + 1;
688 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
689 "Got Set-Cookie Domain: %s\n", cookie_domain);
691 if (strlen (cookie_domain) < strlen (ctask->leho))
693 delta_cdomain = strlen (ctask->leho) - strlen (cookie_domain);
694 if (0 == strcmp (cookie_domain, ctask->leho + (delta_cdomain)))
696 GNUNET_snprintf (new_cookie_hdr+offset,
697 sizeof (new_cookie_hdr),
698 " domain=%s", ctask->authority);
699 offset += strlen (" domain=") + strlen (ctask->authority);
700 new_cookie_hdr[offset] = ';';
705 else if (strlen (cookie_domain) == strlen (ctask->leho))
707 if (0 == strcmp (cookie_domain, ctask->leho))
709 GNUNET_snprintf (new_cookie_hdr+offset,
710 sizeof (new_cookie_hdr),
711 " domain=%s", ctask->host);
712 offset += strlen (" domain=") + strlen (ctask->host);
713 new_cookie_hdr[offset] = ';';
718 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
719 "Cookie domain invalid\n");
723 memcpy (new_cookie_hdr+offset, tok, strlen (tok));
724 offset += strlen (tok);
725 new_cookie_hdr[offset] = ';';
731 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
732 "Got Set-Cookie HTTP header %s\n", new_cookie_hdr);
734 if (GNUNET_NO == MHD_add_response_header (ctask->response,
735 MHD_HTTP_HEADER_SET_COOKIE,
738 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
739 "MHD: Error adding set-cookie header field %s\n",
740 hdr_generic+cookie_hdr_len+1);
745 ndup = GNUNET_strdup (hdr_generic);
746 hdr_type = strtok (ndup, ":");
748 if (NULL == hdr_type)
754 hdr_val = strtok (NULL, "");
762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
763 "Trying to set %s: %s\n",
766 if (GNUNET_NO == MHD_add_response_header (ctask->response,
770 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
771 "MHD: Error adding %s header field %s\n",
782 * @param hd a http daemon list entry
785 run_httpd (struct MhdHttpList *hd);
796 * Task run whenever HTTP server operations are pending.
799 * @param tc sched context
803 const struct GNUNET_SCHEDULER_TaskContext *tc);
806 run_mhd_now (struct MhdHttpList *hd)
808 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
811 "MHD: killing old task\n");
812 GNUNET_SCHEDULER_cancel (hd->httpd_task);
814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
815 "MHD: Scheduling MHD now\n");
816 hd->httpd_task = GNUNET_SCHEDULER_add_now (&do_httpd, hd);
820 * Ask cURL for the select sets and schedule download
823 curl_download_prepare ();
826 * Callback to free content
828 * @param cls content to free
829 * @param tc task context
832 mhd_content_free (void *cls,
833 const struct GNUNET_SCHEDULER_TaskContext *tc)
835 struct ProxyCurlTask *ctask = cls;
836 GNUNET_assert (NULL == ctask->pp_match_head);
838 if (NULL != ctask->headers)
839 curl_slist_free_all (ctask->headers);
841 if (NULL != ctask->headers)
842 curl_slist_free_all (ctask->resolver);
844 if (NULL != ctask->response)
845 MHD_destroy_response (ctask->response);
853 * Callback for MHD response
856 * @param pos in buffer
858 * @param max space in buffer
859 * @return number of bytes written
862 mhd_content_cb (void *cls,
867 struct ProxyCurlTask *ctask = cls;
868 struct ProxyREMatch *re_match = ctask->pp_match_head;
870 long long int bytes_to_copy = ctask->buffer_write_ptr - ctask->buffer_read_ptr;
872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
873 "MHD: content cb for %s. To copy: %lld\n",
874 ctask->url, bytes_to_copy);
875 GNUNET_assert (bytes_to_copy >= 0);
877 if ((GNUNET_YES == ctask->download_is_finished) &&
878 (GNUNET_NO == ctask->download_error) &&
879 (0 == bytes_to_copy) &&
880 (BUF_WAIT_FOR_CURL == ctask->buf_status))
882 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
883 "MHD: sending response for %s\n", ctask->url);
884 ctask->download_in_progress = GNUNET_NO;
885 run_mhd_now (ctask->mhd);
886 GNUNET_SCHEDULER_add_now (&mhd_content_free, ctask);
887 total_mhd_connections--;
888 return MHD_CONTENT_READER_END_OF_STREAM;
891 if ((GNUNET_YES == ctask->download_error) &&
892 (GNUNET_YES == ctask->download_is_finished) &&
893 (0 == bytes_to_copy) &&
894 (BUF_WAIT_FOR_CURL == ctask->buf_status))
896 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
897 "MHD: sending error response\n");
898 ctask->download_in_progress = GNUNET_NO;
899 run_mhd_now (ctask->mhd);
900 GNUNET_SCHEDULER_add_now (&mhd_content_free, ctask);
901 total_mhd_connections--;
902 return MHD_CONTENT_READER_END_WITH_ERROR;
905 if ( ctask->buf_status == BUF_WAIT_FOR_CURL )
909 for (; NULL != re_match; re_match = ctask->pp_match_head)
911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
912 "MHD: Processing PP %s\n",
914 bytes_to_copy = re_match->start - ctask->buffer_read_ptr;
915 GNUNET_assert (bytes_to_copy >= 0);
917 if (bytes_to_copy+copied > max)
919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
920 "MHD: buffer in response too small for %d. Using available space (%d). (%s)\n",
924 memcpy (buf+copied, ctask->buffer_read_ptr, max-copied);
925 ctask->buffer_read_ptr += max-copied;
927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
928 "MHD: copied %d bytes\n", copied);
932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
933 "MHD: copying %d bytes to mhd response at offset %d\n",
934 bytes_to_copy, ctask->buffer_read_ptr);
935 memcpy (buf+copied, ctask->buffer_read_ptr, bytes_to_copy);
936 copied += bytes_to_copy;
938 if (GNUNET_NO == re_match->done)
940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
941 "MHD: Waiting for PP of %s\n", re_match->hostname);
942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
943 "MHD: copied %d bytes\n", copied);
944 ctask->buffer_read_ptr += bytes_to_copy;
948 if (strlen (re_match->result) > (max - copied))
950 //FIXME partially copy domain here
951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
952 "MHD: buffer in response too small for %s! (%s)\n",
955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
956 "MHD: copied %d bytes\n", copied);
957 ctask->buffer_read_ptr += bytes_to_copy;
961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
962 "MHD: Adding PP result %s to buffer\n",
964 memcpy (buf+copied, re_match->result, strlen (re_match->result));
965 copied += strlen (re_match->result);
966 ctask->buffer_read_ptr = re_match->end;
967 GNUNET_CONTAINER_DLL_remove (ctask->pp_match_head,
968 ctask->pp_match_tail,
970 GNUNET_free (re_match);
973 bytes_to_copy = ctask->buffer_write_ptr - ctask->buffer_read_ptr;
975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
976 "MHD: copied: %d left: %d, space left in buf: %d\n",
978 bytes_to_copy, max-copied);
980 GNUNET_assert (0 <= bytes_to_copy);
982 if (GNUNET_NO == ctask->download_is_finished)
984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
985 "MHD: Purging buffer\n");
986 memmove (ctask->buffer, ctask->buffer_read_ptr, bytes_to_copy);
987 ctask->buffer_read_ptr = ctask->buffer;
988 ctask->buffer_write_ptr = ctask->buffer + bytes_to_copy;
989 ctask->buffer[bytes_to_copy] = '\0';
992 if (bytes_to_copy+copied > max)
993 bytes_to_copy = max-copied;
995 if (0 > bytes_to_copy)
998 memcpy (buf+copied, ctask->buffer_read_ptr, bytes_to_copy);
999 ctask->buffer_read_ptr += bytes_to_copy;
1000 copied += bytes_to_copy;
1001 ctask->buf_status = BUF_WAIT_FOR_CURL;
1003 if (NULL != ctask->curl)
1004 curl_easy_pause (ctask->curl, CURLPAUSE_CONT);
1006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1007 "MHD: copied %d bytes\n", copied);
1008 run_mhd_now (ctask->mhd);
1013 * Shorten result callback
1015 * @param cls the proxycurltask
1016 * @param short_name the shortened name (NULL on error)
1019 process_shorten (void* cls, const char* short_name)
1021 struct ProxyREMatch *re_match = cls;
1022 char result[sizeof (re_match->result)];
1024 if (NULL == short_name)
1026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1027 "PP: Unable to shorten %s\n",
1028 re_match->hostname);
1029 GNUNET_CONTAINER_DLL_remove (re_match->ctask->pp_match_head,
1030 re_match->ctask->pp_match_tail,
1032 GNUNET_free (re_match);
1036 if (0 == strcmp (short_name, re_match->ctask->leho))
1037 strcpy (result, re_match->ctask->host);
1039 strcpy (result, short_name);
1041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1042 "PP: Shorten %s -> %s\n",
1046 if (re_match->ctask->mhd->is_ssl)
1047 sprintf (re_match->result, "href=\"https://%s", result);
1049 sprintf (re_match->result, "href=\"http://%s", result);
1051 re_match->done = GNUNET_YES;
1052 run_mhd_now (re_match->ctask->mhd);
1057 * Postprocess data in buffer. From read ptr to write ptr
1059 * @param cls the curlproxytask
1060 * @param tc task context
1063 postprocess_buffer (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1065 struct ProxyCurlTask *ctask = cls;
1066 struct ProxyREMatch *re_match;
1067 char* re_ptr = ctask->buffer_read_ptr;
1068 char re_hostname[255];
1069 regmatch_t m[RE_N_MATCHES];
1071 ctask->pp_task = GNUNET_SCHEDULER_NO_TASK;
1073 if (GNUNET_YES != ctask->parse_content)
1075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1076 "PP: Not parsing content\n");
1077 ctask->buf_status = BUF_WAIT_FOR_MHD;
1078 run_mhd_now (ctask->mhd);
1082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1083 "PP: We need to parse the HTML\n");
1085 /* 0 means match found */
1086 while (0 == regexec (&re_dotplus, re_ptr, RE_N_MATCHES, m, 0))
1088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1089 "PP: regex match\n");
1091 GNUNET_assert (m[1].rm_so != -1);
1093 memset (re_hostname, 0, sizeof (re_hostname));
1094 memcpy (re_hostname, re_ptr+m[1].rm_so, (m[3].rm_eo-m[1].rm_so));
1096 re_match = GNUNET_malloc (sizeof (struct ProxyREMatch));
1097 re_match->start = re_ptr + m[0].rm_so;
1098 re_match->end = re_ptr + m[3].rm_eo;
1099 re_match->done = GNUNET_NO;
1100 re_match->ctask = ctask;
1101 strcpy (re_match->hostname, re_hostname);
1102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1103 "PP: Got hostname %s\n", re_hostname);
1104 re_ptr += m[3].rm_eo;
1106 if (GNUNET_YES == is_tld (re_match->hostname, GNUNET_GNS_TLD_PLUS))
1108 re_match->hostname[strlen(re_match->hostname)-1] = '\0';
1109 strcpy (re_match->hostname+strlen(re_match->hostname),
1113 re_match->shorten_task = GNUNET_GNS_shorten_zone (gns_handle,
1115 &local_private_zone,
1116 &local_shorten_zone,
1119 re_match); //FIXME cancel appropriately
1121 GNUNET_CONTAINER_DLL_insert_tail (ctask->pp_match_head,
1122 ctask->pp_match_tail,
1126 ctask->buf_status = BUF_WAIT_FOR_MHD;
1127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1128 "PP: No more matches\n");
1129 run_mhd_now (ctask->mhd);
1133 * Handle data from cURL
1135 * @param ptr pointer to the data
1136 * @param size number of blocks of data
1137 * @param nmemb blocksize
1138 * @param ctx the curlproxytask
1139 * @return number of bytes handled
1142 curl_download_cb (void *ptr, size_t size, size_t nmemb, void* ctx)
1144 const char *cbuf = ptr;
1145 size_t total = size * nmemb;
1146 struct ProxyCurlTask *ctask = ctx;
1147 size_t buf_space = sizeof (ctask->buffer) -
1148 (ctask->buffer_write_ptr-ctask->buffer);
1150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1151 "CURL: Got %d. %d free in buffer\n",
1154 if (total > (buf_space - CURL_BUF_PADDING))
1156 if (ctask->buf_status == BUF_WAIT_FOR_CURL)
1158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1159 "CURL: Buffer full starting postprocessing\n");
1160 ctask->buf_status = BUF_WAIT_FOR_PP;
1161 ctask->pp_task = GNUNET_SCHEDULER_add_now (&postprocess_buffer,
1163 return CURL_WRITEFUNC_PAUSE;
1166 /* we should not get called in that case */
1167 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1168 "CURL: called out of context and no space in buffer!\n");
1169 return CURL_WRITEFUNC_PAUSE;
1172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1173 "CURL: Copying %d bytes to buffer (%s)\n", total, ctask->url);
1174 memcpy (ctask->buffer_write_ptr, cbuf, total);
1175 ctask->bytes_in_buffer += total;
1176 ctask->buffer_write_ptr += total;
1177 ctask->buffer_write_ptr[0] = '\0';
1183 * Task that is run when we are ready to receive more data
1186 * @param cls closure
1187 * @param tc task context
1190 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1193 * Ask cURL for the select sets and schedule download
1196 curl_download_prepare ()
1203 struct GNUNET_NETWORK_FDSet *grs;
1204 struct GNUNET_NETWORK_FDSet *gws;
1206 struct GNUNET_TIME_Relative rtime;
1212 mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max);
1214 if (mret != CURLM_OK)
1216 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1217 "%s failed at %s:%d: `%s'\n",
1218 "curl_multi_fdset", __FILE__, __LINE__,
1219 curl_multi_strerror (mret));
1220 //TODO cleanup here?
1224 mret = curl_multi_timeout (curl_multi, &to);
1225 rtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1227 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1228 "cURL multi fds: max=%d timeout=%llu\n", max, to);
1230 grs = GNUNET_NETWORK_fdset_create ();
1231 gws = GNUNET_NETWORK_fdset_create ();
1232 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1233 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1235 "Scheduling task cURL\n");
1237 if (curl_download_task != GNUNET_SCHEDULER_NO_TASK)
1238 GNUNET_SCHEDULER_cancel (curl_download_task);
1242 curl_download_task =
1243 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1246 &curl_task_download, curl_multi);
1248 else if (NULL != ctasks_head)
1250 /* as specified in curl docs */
1251 curl_download_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
1252 &curl_task_download,
1255 GNUNET_NETWORK_fdset_destroy (gws);
1256 GNUNET_NETWORK_fdset_destroy (grs);
1262 * Task that is run when we are ready to receive more data
1265 * @param cls closure
1266 * @param tc task context
1269 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1273 struct CURLMsg *msg;
1275 struct ProxyCurlTask *ctask;
1279 struct ProxyCurlTask *clean_head = NULL;
1280 struct ProxyCurlTask *clean_tail = NULL;
1282 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1284 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1286 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1287 "Shutdown requested while trying to download\n");
1291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1299 mret = curl_multi_perform (curl_multi, &running);
1301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1302 "Running curl tasks: %d\n", running);
1304 ctask = ctasks_head;
1305 for (; ctask != NULL; ctask = ctask->next)
1307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1308 "CTask: %s\n", ctask->url);
1312 if (num_ctasks != running)
1314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1315 "%d ctasks, %d curl running\n", num_ctasks, running);
1320 ctask = ctasks_head;
1321 msg = curl_multi_info_read (curl_multi, &msgnum);
1322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1323 "Messages left: %d\n", msgnum);
1330 if ((msg->data.result != CURLE_OK) &&
1331 (msg->data.result != CURLE_GOT_NOTHING))
1333 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1334 "Download curl failed");
1336 for (; ctask != NULL; ctask = ctask->next)
1338 if (NULL == ctask->curl)
1341 if (memcmp (msg->easy_handle, ctask->curl, sizeof (CURL)) != 0)
1344 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1345 "CURL: Download failed for task %s: %s.\n",
1347 curl_easy_strerror (msg->data.result));
1348 ctask->download_is_finished = GNUNET_YES;
1349 ctask->download_error = GNUNET_YES;
1350 if (CURLE_OK == curl_easy_getinfo (ctask->curl,
1351 CURLINFO_RESPONSE_CODE,
1353 ctask->curl_response_code = resp_code;
1354 ctask->ready_to_queue = MHD_YES;
1355 ctask->buf_status = BUF_WAIT_FOR_MHD;
1356 run_mhd_now (ctask->mhd);
1358 GNUNET_CONTAINER_DLL_remove (ctasks_head, ctasks_tail,
1360 GNUNET_CONTAINER_DLL_insert (clean_head, clean_tail, ctask);
1363 GNUNET_assert (ctask != NULL);
1367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1368 "CURL: download completed.\n");
1370 for (; ctask != NULL; ctask = ctask->next)
1372 if (NULL == ctask->curl)
1375 if (memcmp (msg->easy_handle, ctask->curl, sizeof (CURL)) != 0)
1378 if (ctask->buf_status != BUF_WAIT_FOR_CURL)
1381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1382 "CURL: completed task %s found.\n", ctask->url);
1383 if (CURLE_OK == curl_easy_getinfo (ctask->curl,
1384 CURLINFO_RESPONSE_CODE,
1386 ctask->curl_response_code = resp_code;
1389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1390 "CURL: Completed ctask!\n");
1391 if (GNUNET_SCHEDULER_NO_TASK == ctask->pp_task)
1393 ctask->buf_status = BUF_WAIT_FOR_PP;
1394 ctask->pp_task = GNUNET_SCHEDULER_add_now (&postprocess_buffer,
1398 ctask->ready_to_queue = MHD_YES;
1399 ctask->download_is_finished = GNUNET_YES;
1401 /* We MUST not modify the multi handle else we loose messages */
1402 GNUNET_CONTAINER_DLL_remove (ctasks_head, ctasks_tail,
1404 GNUNET_CONTAINER_DLL_insert (clean_head, clean_tail, ctask);
1408 GNUNET_assert (ctask != NULL);
1410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1411 "CURL: %s\n", curl_easy_strerror(msg->data.result));
1417 } while (msgnum > 0);
1419 for (ctask=clean_head; ctask != NULL; ctask = ctask->next)
1421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1422 "CURL: Removing task %s.\n", ctask->url);
1423 curl_multi_remove_handle (curl_multi, ctask->curl);
1424 curl_easy_cleanup (ctask->curl);
1429 for (ctask=ctasks_head; ctask != NULL; ctask = ctask->next)
1434 if (num_ctasks != running)
1436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1437 "CURL: %d tasks, %d running\n", num_ctasks, running);
1440 GNUNET_assert ( num_ctasks == running );
1442 } while (mret == CURLM_CALL_MULTI_PERFORM);
1444 if (mret != CURLM_OK)
1446 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "CURL: %s failed at %s:%d: `%s'\n",
1447 "curl_multi_perform", __FILE__, __LINE__,
1448 curl_multi_strerror (mret));
1450 curl_download_prepare();
1454 * Process LEHO lookup
1456 * @param cls the ctask
1457 * @param rd_count number of records returned
1458 * @param rd record data
1461 process_leho_lookup (void *cls,
1463 const struct GNUNET_NAMESTORE_RecordData *rd)
1465 struct ProxyCurlTask *ctask = cls;
1466 char hosthdr[262]; //256 + "Host: "
1470 struct hostent *phost;
1472 char resolvename[512];
1475 strcpy (ctask->leho, "");
1478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1479 "No LEHO present!\n");
1481 for (i=0; i<rd_count; i++)
1483 if (rd[i].record_type != GNUNET_GNS_RECORD_LEHO)
1486 memcpy (ctask->leho, rd[i].data, rd[i].data_size);
1488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1489 "Found LEHO %s for %s\n", ctask->leho, ctask->url);
1492 if (0 != strcmp (ctask->leho, ""))
1494 sprintf (hosthdr, "%s%s", "Host: ", ctask->leho);
1495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1496 "New HTTP header value: %s\n", hosthdr);
1497 ctask->headers = curl_slist_append (ctask->headers, hosthdr);
1498 GNUNET_assert (NULL != ctask->headers);
1499 ret = curl_easy_setopt (ctask->curl, CURLOPT_HTTPHEADER, ctask->headers);
1500 if (CURLE_OK != ret)
1502 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s failed at %s:%d: `%s'\n",
1503 "curl_easy_setopt", __FILE__, __LINE__, curl_easy_strerror(ret));
1508 if (ctask->mhd->is_ssl)
1510 phost = (struct hostent*)gethostbyname (ctask->host);
1514 ssl_ip = inet_ntoa(*((struct in_addr*)(phost->h_addr)));
1515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1516 "SSL target server: %s\n", ssl_ip);
1517 sprintf (resolvename, "%s:%d:%s", ctask->leho, HTTPS_PORT, ssl_ip);
1518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1519 "Curl resolve: %s\n", resolvename);
1520 ctask->resolver = curl_slist_append ( ctask->resolver, resolvename);
1521 curl_easy_setopt (ctask->curl, CURLOPT_RESOLVE, ctask->resolver);
1522 sprintf (curlurl, "https://%s%s", ctask->leho, ctask->url);
1523 curl_easy_setopt (ctask->curl, CURLOPT_URL, curlurl);
1527 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1528 "gethostbyname failed for %s!\n", ctask->host);
1529 ctask->download_is_finished = GNUNET_YES;
1530 ctask->download_error = GNUNET_YES;
1535 if (CURLM_OK != (mret=curl_multi_add_handle (curl_multi, ctask->curl)))
1537 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1538 "%s failed at %s:%d: `%s'\n",
1539 "curl_multi_add_handle", __FILE__, __LINE__,
1540 curl_multi_strerror (mret));
1541 ctask->download_is_finished = GNUNET_YES;
1542 ctask->download_error = GNUNET_YES;
1545 GNUNET_CONTAINER_DLL_insert (ctasks_head, ctasks_tail, ctask);
1547 curl_download_prepare ();
1552 * Initialize download and trigger curl
1554 * @param cls the proxycurltask
1555 * @param auth_name the name of the authority (site of origin) of ctask->host
1559 process_get_authority (void *cls,
1560 const char* auth_name)
1562 struct ProxyCurlTask *ctask = cls;
1564 if (NULL == auth_name)
1566 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1567 "Get authority failed!\n");
1568 strcpy (ctask->authority, "");
1572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1573 "Get authority yielded %s\n", auth_name);
1574 strcpy (ctask->authority, auth_name);
1577 GNUNET_GNS_lookup_zone (gns_handle,
1580 GNUNET_GNS_RECORD_LEHO,
1581 GNUNET_YES, //Only cached for performance
1583 &process_leho_lookup,
1589 * Main MHD callback for handling requests.
1592 * @param con MHD connection handle
1593 * @param url the url in the request
1594 * @param meth the HTTP method used ("GET", "PUT", etc.)
1595 * @param ver the HTTP version string (i.e. "HTTP/1.1")
1596 * @param upload_data the data being uploaded (excluding HEADERS,
1597 * for a POST that fits into memory and that is encoded
1598 * with a supported encoding, the POST data will NOT be
1599 * given in upload_data and is instead available as
1600 * part of MHD_get_connection_values; very large POST
1601 * data *will* be made available incrementally in
1603 * @param upload_data_size set initially to the size of the
1604 * upload_data provided; the method must update this
1605 * value to the number of bytes NOT processed;
1606 * @param con_cls pointer to location where we store the 'struct Request'
1607 * @return MHD_YES if the connection was handled successfully,
1608 * MHD_NO if the socket must be closed due to a serious
1609 * error while handling the request
1612 create_response (void *cls,
1613 struct MHD_Connection *con,
1617 const char *upload_data,
1618 size_t *upload_data_size,
1621 struct MhdHttpList* hd = cls;
1622 const char* page = "<html><head><title>gnoxy</title>"\
1623 "</head><body>cURL fail</body></html>";
1625 char curlurl[MAX_HTTP_URI_LENGTH]; // buffer overflow!
1628 struct ProxyCurlTask *ctask;
1631 if ((0 != strcasecmp (meth, MHD_HTTP_METHOD_GET)) &&
1632 (0 != strcasecmp (meth, MHD_HTTP_METHOD_PUT)) &&
1633 (0 != strcasecmp (meth, MHD_HTTP_METHOD_POST)))
1635 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1636 "MHD: %s NOT IMPLEMENTED!\n", meth);
1641 if (NULL == *con_cls)
1644 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1645 "Got %s request for %s\n", meth, url);
1646 ctask = GNUNET_malloc (sizeof (struct ProxyCurlTask));
1650 ctask->curl = curl_easy_init();
1651 if (NULL == ctask->curl)
1653 ctask->response = MHD_create_response_from_buffer (strlen (page),
1655 MHD_RESPMEM_PERSISTENT);
1656 ret = MHD_queue_response (con,
1659 MHD_destroy_response (ctask->response);
1660 GNUNET_free (ctask);
1664 ctask->download_in_progress = GNUNET_YES;
1665 ctask->buf_status = BUF_WAIT_FOR_CURL;
1666 ctask->connection = con;
1667 ctask->curl_response_code = MHD_HTTP_OK;
1668 ctask->buffer_read_ptr = ctask->buffer;
1669 ctask->buffer_write_ptr = ctask->buffer;
1670 ctask->pp_task = GNUNET_SCHEDULER_NO_TASK;
1672 MHD_get_connection_values (con,
1674 &con_val_iter, ctask);
1676 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_PUT))
1678 if (0 == *upload_data_size)
1680 curl_easy_cleanup (ctask->curl);
1681 GNUNET_free (ctask);
1684 ctask->put_read_offset = 0;
1685 ctask->put_read_size = *upload_data_size;
1686 curl_easy_setopt (ctask->curl, CURLOPT_UPLOAD, 1);
1687 curl_easy_setopt (ctask->curl, CURLOPT_READDATA, upload_data);
1688 //curl_easy_setopt (ctask->curl, CURLOPT_READFUNCTION, &curl_read_cb);
1690 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1691 "Got PUT data: %s\n", upload_data);
1692 curl_easy_cleanup (ctask->curl);
1693 GNUNET_free (ctask);
1697 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_POST))
1699 if (0 == *upload_data_size)
1701 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1702 "Setting up POST processor\n");
1703 ctask->post_handler = MHD_create_post_processor (con,
1705 &con_post_data_iter,
1709 curl_easy_setopt (ctask->curl, CURLOPT_POST, 1);
1710 curl_easy_setopt (ctask->curl, CURLOPT_POSTFIELDSIZE, *upload_data_size);
1711 curl_easy_setopt (ctask->curl, CURLOPT_COPYPOSTFIELDS, upload_data);
1713 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1714 "Got POST data: %s\n", upload_data);
1715 curl_easy_cleanup (ctask->curl);
1716 GNUNET_free (ctask);
1720 curl_easy_setopt (ctask->curl, CURLOPT_HEADERFUNCTION, &curl_check_hdr);
1721 curl_easy_setopt (ctask->curl, CURLOPT_HEADERDATA, ctask);
1722 curl_easy_setopt (ctask->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1723 curl_easy_setopt (ctask->curl, CURLOPT_WRITEDATA, ctask);
1724 curl_easy_setopt (ctask->curl, CURLOPT_FOLLOWLOCATION, 0);
1725 curl_easy_setopt (ctask->curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
1727 if (GNUNET_NO == ctask->mhd->is_ssl)
1729 sprintf (curlurl, "http://%s%s", ctask->host, url);
1730 MHD_get_connection_values (con,
1731 MHD_GET_ARGUMENT_KIND,
1732 &get_uri_val_iter, curlurl);
1733 curl_easy_setopt (ctask->curl, CURLOPT_URL, curlurl);
1735 strcpy (ctask->url, url);
1736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1737 "MHD: Adding new curl task for %s%s\n", ctask->host, url);
1738 MHD_get_connection_values (con,
1739 MHD_GET_ARGUMENT_KIND,
1740 &get_uri_val_iter, ctask->url);
1742 curl_easy_setopt (ctask->curl, CURLOPT_FAILONERROR, 1);
1743 curl_easy_setopt (ctask->curl, CURLOPT_CONNECTTIMEOUT, 600L);
1744 curl_easy_setopt (ctask->curl, CURLOPT_TIMEOUT, 600L);
1746 GNUNET_GNS_get_authority (gns_handle,
1748 &process_get_authority,
1750 ctask->ready_to_queue = GNUNET_NO;
1751 ctask->fin = GNUNET_NO;
1755 ctask = (struct ProxyCurlTask *) *con_cls;
1756 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_POST))
1758 if (0 != *upload_data_size)
1760 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1761 "Invoking POST processor\n");
1762 MHD_post_process (ctask->post_handler,
1763 upload_data, *upload_data_size);
1764 *upload_data_size = 0;
1769 if (GNUNET_YES != ctask->ready_to_queue)
1770 return MHD_YES; /* wait longer */
1772 if (GNUNET_YES == ctask->fin)
1775 ctask->fin = GNUNET_YES;
1776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1777 "MHD: Queueing response for %s\n", ctask->url);
1778 ret = MHD_queue_response (con, ctask->curl_response_code, ctask->response);
1779 run_mhd_now (ctask->mhd);
1790 struct MhdHttpList *hd;
1792 for (hd=mhd_httpd_head; NULL != hd; hd = hd->next)
1800 * @param hd the daemon to run
1803 run_httpd (struct MhdHttpList *hd)
1808 struct GNUNET_NETWORK_FDSet *wrs;
1809 struct GNUNET_NETWORK_FDSet *wws;
1810 struct GNUNET_NETWORK_FDSet *wes;
1813 unsigned MHD_LONG_LONG timeout;
1814 struct GNUNET_TIME_Relative tv;
1819 wrs = GNUNET_NETWORK_fdset_create ();
1820 wes = GNUNET_NETWORK_fdset_create ();
1821 wws = GNUNET_NETWORK_fdset_create ();
1823 GNUNET_assert (MHD_YES == MHD_get_fdset (hd->daemon, &rs, &ws, &es, &max));
1826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1827 "MHD fds: max=%d\n", max);
1829 haveto = MHD_get_timeout (hd->daemon, &timeout);
1831 if (MHD_YES == haveto)
1832 tv.rel_value = (uint64_t) timeout;
1834 tv = GNUNET_TIME_UNIT_FOREVER_REL;
1835 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
1836 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
1837 GNUNET_NETWORK_fdset_copy_native (wes, &es, max + 1);
1839 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1840 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1842 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
1845 GNUNET_NETWORK_fdset_destroy (wrs);
1846 GNUNET_NETWORK_fdset_destroy (wws);
1847 GNUNET_NETWORK_fdset_destroy (wes);
1852 * Task run whenever HTTP server operations are pending.
1855 * @param tc sched context
1858 do_httpd (void *cls,
1859 const struct GNUNET_SCHEDULER_TaskContext *tc)
1861 struct MhdHttpList *hd = cls;
1863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1864 "MHD: Main loop\n");
1865 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1866 MHD_run (hd->daemon);
1873 * Read data from socket
1875 * @param cls the closure
1876 * @param tc scheduler context
1879 do_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1882 * Read from remote end
1884 * @param cls closure
1885 * @param tc scheduler context
1888 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1891 * Write data to remote socket
1893 * @param cls the closure
1894 * @param tc scheduler context
1897 do_write_remote (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1899 struct Socks5Request *s5r = cls;
1902 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
1904 if ((NULL != tc->read_ready) &&
1905 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->remote_sock)) &&
1906 ((len = GNUNET_NETWORK_socket_send (s5r->remote_sock, s5r->rbuf,
1909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1910 "Successfully sent %d bytes to remote socket\n",
1915 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write remote");
1916 if (GNUNET_SCHEDULER_NO_TASK != s5r->rtask)
1917 GNUNET_SCHEDULER_cancel (s5r->rtask);
1918 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
1919 GNUNET_SCHEDULER_cancel (s5r->wtask);
1920 if (GNUNET_SCHEDULER_NO_TASK != s5r->fwdrtask)
1921 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1922 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1923 GNUNET_NETWORK_socket_close (s5r->sock);
1929 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1936 * Clean up s5r handles
1938 * @param s5r the handle to destroy
1941 cleanup_s5r (struct Socks5Request *s5r)
1943 if (GNUNET_SCHEDULER_NO_TASK != s5r->rtask)
1944 GNUNET_SCHEDULER_cancel (s5r->rtask);
1945 if (GNUNET_SCHEDULER_NO_TASK != s5r->fwdwtask)
1946 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
1947 if (GNUNET_SCHEDULER_NO_TASK != s5r->fwdrtask)
1948 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1950 if (NULL != s5r->remote_sock)
1951 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1952 if ((NULL != s5r->sock) && (s5r->cleanup_sock == GNUNET_YES))
1953 GNUNET_NETWORK_socket_close (s5r->sock);
1959 * Write data to socket
1961 * @param cls the closure
1962 * @param tc scheduler context
1965 do_write (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1967 struct Socks5Request *s5r = cls;
1970 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
1972 if ((NULL != tc->read_ready) &&
1973 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->sock)) &&
1974 ((len = GNUNET_NETWORK_socket_send (s5r->sock, s5r->wbuf,
1977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1978 "Successfully sent %d bytes to socket\n",
1984 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write");
1985 s5r->cleanup = GNUNET_YES;
1986 s5r->cleanup_sock = GNUNET_YES;
1992 if (GNUNET_YES == s5r->cleanup)
1998 if ((s5r->state == SOCKS5_DATA_TRANSFER) &&
1999 (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK))
2001 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2003 &do_read_remote, s5r);
2007 * Read from remote end
2009 * @param cls closure
2010 * @param tc scheduler context
2013 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2015 struct Socks5Request *s5r = cls;
2017 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
2020 if ((NULL != tc->write_ready) &&
2021 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->remote_sock)) &&
2022 (s5r->wbuf_len = GNUNET_NETWORK_socket_recv (s5r->remote_sock, s5r->wbuf,
2023 sizeof (s5r->wbuf))))
2025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2026 "Successfully read %d bytes from remote socket\n",
2031 if (s5r->wbuf_len == 0)
2032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2033 "0 bytes received from remote... graceful shutdown!\n");
2034 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
2035 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
2036 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
2037 GNUNET_SCHEDULER_cancel (s5r->rtask);
2039 GNUNET_NETWORK_socket_close (s5r->remote_sock);
2040 s5r->remote_sock = NULL;
2041 GNUNET_NETWORK_socket_close (s5r->sock);
2047 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2055 * Adds a socket to MHD
2057 * @param h the handle to the socket to add
2058 * @param daemon the daemon to add the fd to
2059 * @return whatever MHD_add_connection returns
2062 add_handle_to_mhd (struct GNUNET_NETWORK_Handle *h, struct MHD_Daemon *daemon)
2065 struct sockaddr *addr;
2068 fd = dup (GNUNET_NETWORK_get_fd (h));
2069 addr = GNUNET_NETWORK_get_addr (h);
2070 len = GNUNET_NETWORK_get_addrlen (h);
2072 return MHD_add_connection (daemon, fd, addr, len);
2076 * Read file in filename
2078 * @param filename file to read
2079 * @param size pointer where filesize is stored
2083 load_file (const char* filename,
2090 GNUNET_DISK_file_size (filename, &fsize,
2091 GNUNET_YES, GNUNET_YES))
2093 if (fsize > MAX_PEM_SIZE)
2095 *size = (unsigned int) fsize;
2096 buffer = GNUNET_malloc (*size);
2097 if (fsize != GNUNET_DISK_fn_read (filename, buffer, (size_t) fsize))
2099 GNUNET_free (buffer);
2107 * Load PEM key from file
2109 * @param key where to store the data
2110 * @param keyfile path to the PEM file
2111 * @return GNUNET_OK on success
2114 load_key_from_file (gnutls_x509_privkey_t key, const char* keyfile)
2116 gnutls_datum_t key_data;
2119 key_data.data = (unsigned char*) load_file (keyfile, &key_data.size);
2120 ret = gnutls_x509_privkey_import (key, &key_data,
2121 GNUTLS_X509_FMT_PEM);
2122 if (GNUTLS_E_SUCCESS != ret)
2124 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2125 _("Unable to import private key from file `%s'\n"),
2129 GNUNET_free (key_data.data);
2130 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
2135 * Load cert from file
2137 * @param crt struct to store data in
2138 * @param certfile path to pem file
2139 * @return GNUNET_OK on success
2142 load_cert_from_file (gnutls_x509_crt_t crt, char* certfile)
2144 gnutls_datum_t cert_data;
2145 cert_data.data = NULL;
2148 cert_data.data = (unsigned char*) load_file (certfile, &cert_data.size);
2149 ret = gnutls_x509_crt_import (crt, &cert_data,
2150 GNUTLS_X509_FMT_PEM);
2151 if (GNUTLS_E_SUCCESS != ret)
2153 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2154 _("Unable to import certificate %s\n"), certfile);
2157 GNUNET_free (cert_data.data);
2158 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
2163 * Generate new certificate for specific name
2165 * @param name the subject name to generate a cert for
2166 * @return a struct holding the PEM data
2168 static struct ProxyGNSCertificate *
2169 generate_gns_certificate (const char *name)
2173 unsigned int serial;
2174 size_t key_buf_size;
2175 size_t cert_buf_size;
2176 gnutls_x509_crt_t request;
2180 ret = gnutls_x509_crt_init (&request);
2182 if (GNUTLS_E_SUCCESS != ret)
2187 ret = gnutls_x509_crt_set_key (request, proxy_ca.key);
2189 if (GNUTLS_E_SUCCESS != ret)
2194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Generating cert\n");
2196 struct ProxyGNSCertificate *pgc =
2197 GNUNET_malloc (sizeof (struct ProxyGNSCertificate));
2199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding DNs\n");
2201 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COUNTRY_NAME,
2204 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_ORGANIZATION_NAME,
2207 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COMMON_NAME,
2208 0, name, strlen (name));
2210 ret = gnutls_x509_crt_set_version (request, 3);
2212 ret = gnutls_rnd (GNUTLS_RND_NONCE, &serial, sizeof (serial));
2214 etime = time (NULL);
2215 tm_data = localtime (&etime);
2218 ret = gnutls_x509_crt_set_serial (request,
2222 ret = gnutls_x509_crt_set_activation_time (request,
2225 etime = mktime (tm_data);
2232 ret = gnutls_x509_crt_set_expiration_time (request,
2234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Signing...\n");
2236 ret = gnutls_x509_crt_sign (request, proxy_ca.cert, proxy_ca.key);
2238 key_buf_size = sizeof (pgc->key);
2239 cert_buf_size = sizeof (pgc->cert);
2241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Exporting certificate...\n");
2243 gnutls_x509_crt_export (request, GNUTLS_X509_FMT_PEM,
2244 pgc->cert, &cert_buf_size);
2246 gnutls_x509_privkey_export (proxy_ca.key, GNUTLS_X509_FMT_PEM,
2247 pgc->key, &key_buf_size);
2250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up\n");
2251 gnutls_x509_crt_deinit (request);
2259 * Accept policy for mhdaemons
2262 * @param addr the sockaddr
2263 * @param addrlen the sockaddr length
2264 * @return MHD_NO if sockaddr is wrong or #conns too high
2267 accept_cb (void* cls, const struct sockaddr *addr, socklen_t addrlen)
2269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2270 "In MHD accept policy cb\n");
2274 if (addr->sa_family == AF_UNIX)
2278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2279 "Connection accepted\n");
2286 * Adds a socket to an SSL MHD instance
2287 * It is important the the domain name is
2288 * correct. In most cases we need to start a new daemon
2290 * @param h the handle to add to a daemon
2291 * @param domain the domain the ssl daemon has to serve
2292 * @return MHD_YES on success
2295 add_handle_to_ssl_mhd (struct GNUNET_NETWORK_Handle *h, const char* domain)
2297 struct MhdHttpList *hd = NULL;
2298 struct ProxyGNSCertificate *pgc;
2299 struct NetworkHandleList *nh;
2301 for (hd = mhd_httpd_head; NULL != hd; hd = hd->next)
2302 if (0 == strcmp (hd->domain, domain))
2307 pgc = generate_gns_certificate (domain);
2309 hd = GNUNET_malloc (sizeof (struct MhdHttpList));
2310 hd->is_ssl = GNUNET_YES;
2311 strcpy (hd->domain, domain);
2312 hd->proxy_cert = pgc;
2315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2316 "No previous SSL instance found... starting new one for %s\n",
2319 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_SSL, 4444,
2321 &create_response, hd,
2322 MHD_OPTION_LISTEN_SOCKET, GNUNET_NETWORK_get_fd (mhd_unix_socket),
2323 MHD_OPTION_CONNECTION_LIMIT, MHD_MAX_CONNECTIONS,
2324 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
2325 MHD_OPTION_NOTIFY_COMPLETED,
2327 MHD_OPTION_HTTPS_MEM_KEY, pgc->key,
2328 MHD_OPTION_HTTPS_MEM_CERT, pgc->cert,
2331 GNUNET_assert (hd->daemon != NULL);
2332 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
2334 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
2337 nh = GNUNET_malloc (sizeof (struct NetworkHandleList));
2340 GNUNET_CONTAINER_DLL_insert (hd->socket_handles_head,
2341 hd->socket_handles_tail,
2344 return add_handle_to_mhd (h, hd->daemon);
2350 * Read data from incoming connection
2352 * @param cls the closure
2353 * @param tc the scheduler context
2356 do_read (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2358 struct Socks5Request *s5r = cls;
2359 struct socks5_client_hello *c_hello;
2360 struct socks5_server_hello *s_hello;
2361 struct socks5_client_request *c_req;
2362 struct socks5_server_response *s_resp;
2368 struct hostent *phost;
2370 struct sockaddr_in remote_addr;
2371 struct in_addr *r_sin_addr;
2373 struct NetworkHandleList *nh;
2375 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2377 if ((NULL != tc->write_ready) &&
2378 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) &&
2379 (s5r->rbuf_len = GNUNET_NETWORK_socket_recv (s5r->sock, s5r->rbuf,
2380 sizeof (s5r->rbuf))))
2382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2383 "Successfully read %d bytes from socket\n",
2388 if (s5r->rbuf_len != 0)
2389 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "read");
2391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disco!\n");
2393 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
2394 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
2395 if (s5r->wtask != GNUNET_SCHEDULER_NO_TASK)
2396 GNUNET_SCHEDULER_cancel (s5r->wtask);
2397 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
2398 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
2399 GNUNET_NETWORK_socket_close (s5r->remote_sock);
2400 GNUNET_NETWORK_socket_close (s5r->sock);
2405 if (s5r->state == SOCKS5_INIT)
2407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2409 c_hello = (struct socks5_client_hello*)&s5r->rbuf;
2411 GNUNET_assert (c_hello->version == SOCKS_VERSION_5);
2413 s_hello = (struct socks5_server_hello*)&s5r->wbuf;
2414 s5r->wbuf_len = sizeof( struct socks5_server_hello );
2416 s_hello->version = c_hello->version;
2417 s_hello->auth_method = SOCKS_AUTH_NONE;
2419 /* Write response to client */
2420 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2424 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2428 s5r->state = SOCKS5_REQUEST;
2432 if (s5r->state == SOCKS5_REQUEST)
2434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2435 "Processing SOCKS5 request\n");
2436 c_req = (struct socks5_client_request*)&s5r->rbuf;
2437 s_resp = (struct socks5_server_response*)&s5r->wbuf;
2438 //Only 10byte for ipv4 response!
2439 s5r->wbuf_len = 10;//sizeof (struct socks5_server_response);
2441 GNUNET_assert (c_req->addr_type == 3);
2443 dom_len = *((uint8_t*)(&(c_req->addr_type) + 1));
2444 memset(domain, 0, sizeof(domain));
2445 strncpy(domain, (char*)(&(c_req->addr_type) + 2), dom_len);
2446 req_port = *((uint16_t*)(&(c_req->addr_type) + 2 + dom_len));
2448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2449 "Requested connection is %s:%d\n",
2453 if (is_tld (domain, GNUNET_GNS_TLD) ||
2454 is_tld (domain, GNUNET_GNS_TLD_ZKEY))
2456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2457 "Requested connection is gnunet tld\n",
2461 if (ntohs(req_port) == HTTPS_PORT)
2463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2464 "Requested connection is HTTPS\n");
2465 ret = add_handle_to_ssl_mhd ( s5r->sock, domain );
2467 else if (NULL != httpd)
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 "Requested connection is HTTP\n");
2471 nh = GNUNET_malloc (sizeof (struct NetworkHandleList));
2474 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head->socket_handles_head,
2475 mhd_httpd_head->socket_handles_tail,
2478 ret = add_handle_to_mhd ( s5r->sock, httpd );
2483 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2484 _("Failed to start HTTP server\n"));
2485 s_resp->version = 0x05;
2486 s_resp->reply = 0x01;
2487 s5r->cleanup = GNUNET_YES;
2488 s5r->cleanup_sock = GNUNET_YES;
2490 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2496 /* Signal success */
2497 s_resp->version = 0x05;
2498 s_resp->reply = 0x00;
2499 s_resp->reserved = 0x00;
2500 s_resp->addr_type = 0x01;
2502 s5r->cleanup = GNUNET_YES;
2503 s5r->cleanup_sock = GNUNET_NO;
2505 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2513 phost = (struct hostent*)gethostbyname (domain);
2516 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2517 "Resolve %s error!\n", domain );
2518 s_resp->version = 0x05;
2519 s_resp->reply = 0x01;
2520 s5r->cleanup = GNUNET_YES;
2521 s5r->cleanup_sock = GNUNET_YES;
2523 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2529 s5r->remote_sock = GNUNET_NETWORK_socket_create (AF_INET,
2532 r_sin_addr = (struct in_addr*)(phost->h_addr);
2533 remote_ip = r_sin_addr->s_addr;
2534 memset(&remote_addr, 0, sizeof(remote_addr));
2535 remote_addr.sin_family = AF_INET;
2536 #if HAVE_SOCKADDR_IN_SIN_LEN
2537 remote_addr.sin_len = sizeof (remote_addr);
2539 remote_addr.sin_addr.s_addr = remote_ip;
2540 remote_addr.sin_port = req_port;
2542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2543 "target server: %s:%u\n", inet_ntoa(remote_addr.sin_addr),
2547 GNUNET_NETWORK_socket_connect ( s5r->remote_sock,
2548 (const struct sockaddr*)&remote_addr,
2549 sizeof (remote_addr)))
2550 && (errno != EINPROGRESS))
2552 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "connect");
2553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2554 "socket request error...\n");
2555 s_resp->version = 0x05;
2556 s_resp->reply = 0x01;
2558 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2566 "new remote connection\n");
2568 s_resp->version = 0x05;
2569 s_resp->reply = 0x00;
2570 s_resp->reserved = 0x00;
2571 s_resp->addr_type = 0x01;
2573 s5r->state = SOCKS5_DATA_TRANSFER;
2576 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2580 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2588 if (s5r->state == SOCKS5_DATA_TRANSFER)
2590 if ((s5r->remote_sock == NULL) || (s5r->rbuf_len == 0))
2592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2593 "Closing connection to client\n");
2594 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
2595 GNUNET_SCHEDULER_cancel (s5r->rtask);
2596 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
2597 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
2598 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
2599 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
2600 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
2601 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
2603 if (s5r->remote_sock != NULL)
2604 GNUNET_NETWORK_socket_close (s5r->remote_sock);
2605 GNUNET_NETWORK_socket_close (s5r->sock);
2610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2611 "forwarding %d bytes from client\n", s5r->rbuf_len);
2614 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2616 &do_write_remote, s5r);
2618 if (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK)
2621 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2623 &do_read_remote, s5r);
2633 * Accept new incoming connections
2635 * @param cls the closure
2636 * @param tc the scheduler context
2639 do_accept (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2641 struct GNUNET_NETWORK_Handle *s;
2642 struct Socks5Request *s5r;
2644 ltask = GNUNET_SCHEDULER_NO_TASK;
2645 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2648 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2652 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
2656 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "accept");
2660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2661 "Got an inbound connection, waiting for data\n");
2663 s5r = GNUNET_malloc (sizeof (struct Socks5Request));
2665 s5r->state = SOCKS5_INIT;
2666 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
2667 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
2668 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
2669 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2676 * Task run on shutdown
2678 * @param cls closure
2679 * @param tc task context
2682 do_shutdown (void *cls,
2683 const struct GNUNET_SCHEDULER_TaskContext *tc)
2686 struct MhdHttpList *hd;
2687 struct MhdHttpList *tmp_hd;
2688 struct NetworkHandleList *nh;
2689 struct NetworkHandleList *tmp_nh;
2690 struct ProxyCurlTask *ctask;
2691 struct ProxyCurlTask *ctask_tmp;
2693 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2694 "Shutting down...\n");
2696 gnutls_global_deinit ();
2698 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
2700 GNUNET_SCHEDULER_cancel (curl_download_task);
2701 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
2704 for (hd = mhd_httpd_head; hd != NULL; hd = tmp_hd)
2708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2709 "Stopping daemon\n");
2711 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
2713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2714 "Stopping select task %d\n",
2716 GNUNET_SCHEDULER_cancel (hd->httpd_task);
2717 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
2720 if (NULL != hd->daemon)
2722 MHD_stop_daemon (hd->daemon);
2726 for (nh = hd->socket_handles_head; nh != NULL; nh = tmp_nh)
2730 GNUNET_NETWORK_socket_close (nh->h);
2735 if (NULL != hd->proxy_cert)
2737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2738 "Free certificate\n");
2739 GNUNET_free (hd->proxy_cert);
2745 for (ctask=ctasks_head; ctask != NULL; ctask=ctask_tmp)
2747 ctask_tmp = ctask->next;
2749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2750 "Cleaning up cURL task\n");
2752 if (ctask->curl != NULL)
2753 curl_easy_cleanup (ctask->curl);
2755 if (NULL != ctask->headers)
2756 curl_slist_free_all (ctask->headers);
2757 if (NULL != ctask->resolver)
2758 curl_slist_free_all (ctask->resolver);
2760 if (NULL != ctask->response)
2761 MHD_destroy_response (ctask->response);
2764 GNUNET_free (ctask);
2766 curl_multi_cleanup (curl_multi);
2768 GNUNET_GNS_disconnect (gns_handle);
2773 * Compiles a regex for us
2775 * @param re ptr to re struct
2776 * @param rt the expression to compile
2777 * @return 0 on success
2780 compile_regex (regex_t *re, const char* rt)
2785 status = regcomp (re, rt, REG_EXTENDED|REG_NEWLINE);
2788 regerror (status, re, err, 1024);
2789 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2790 "Regex error compiling '%s': %s\n", rt, err);
2798 * Loads the users local zone key
2800 * @return GNUNET_YES on success
2803 load_local_zone_key (const struct GNUNET_CONFIGURATION_Handle *cfg)
2806 struct GNUNET_CRYPTO_RsaPrivateKey *key = NULL;
2807 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
2808 struct GNUNET_CRYPTO_ShortHashCode *zone = NULL;
2809 struct GNUNET_CRYPTO_ShortHashAsciiEncoded zonename;
2811 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
2812 "ZONEKEY", &keyfile))
2814 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2815 "Unable to load zone key config value!\n");
2819 if (GNUNET_NO == GNUNET_DISK_file_test (keyfile))
2821 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2822 "Unable to load zone key %s!\n", keyfile);
2823 GNUNET_free(keyfile);
2827 key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2828 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
2829 GNUNET_CRYPTO_short_hash(&pkey,
2830 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2832 zone = &local_gns_zone;
2833 GNUNET_CRYPTO_short_hash_to_enc (zone, &zonename);
2834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2835 "Using zone: %s!\n", &zonename);
2836 GNUNET_CRYPTO_rsa_key_free(key);
2837 GNUNET_free(keyfile);
2839 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
2840 "PRIVATE_ZONEKEY", &keyfile))
2842 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2843 "Unable to load private zone key config value!\n");
2847 if (GNUNET_NO == GNUNET_DISK_file_test (keyfile))
2849 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2850 "Unable to load private zone key %s!\n", keyfile);
2851 GNUNET_free(keyfile);
2855 key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2856 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
2857 GNUNET_CRYPTO_short_hash(&pkey,
2858 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2859 &local_private_zone);
2860 GNUNET_CRYPTO_short_hash_to_enc (zone, &zonename);
2861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2862 "Using private zone: %s!\n", &zonename);
2863 GNUNET_CRYPTO_rsa_key_free(key);
2864 GNUNET_free(keyfile);
2866 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
2867 "SHORTEN_ZONEKEY", &keyfile))
2869 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2870 "Unable to load shorten zone key config value!\n");
2874 if (GNUNET_NO == GNUNET_DISK_file_test (keyfile))
2876 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2877 "Unable to load shorten zone key %s!\n", keyfile);
2878 GNUNET_free(keyfile);
2882 key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2883 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
2884 GNUNET_CRYPTO_short_hash(&pkey,
2885 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2886 &local_shorten_zone);
2887 GNUNET_CRYPTO_short_hash_to_enc (zone, &zonename);
2888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2889 "Using shorten zone: %s!\n", &zonename);
2890 GNUNET_CRYPTO_rsa_key_free(key);
2891 GNUNET_free(keyfile);
2897 * Main function that will be run
2899 * @param cls closure
2900 * @param args remaining command-line arguments
2901 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
2902 * @param cfg configuration
2905 run (void *cls, char *const *args, const char *cfgfile,
2906 const struct GNUNET_CONFIGURATION_Handle *cfg)
2908 struct sockaddr_in sa;
2909 struct MhdHttpList *hd;
2910 struct sockaddr_un mhd_unix_sock_addr;
2912 char* proxy_sockfile;
2913 char* cafile_cfg = NULL;
2916 curl_multi = curl_multi_init ();
2918 if (NULL == curl_multi)
2920 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2921 "Failed to create cURL multo handle!\n");
2925 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2927 cafile = cafile_opt;
2930 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
2934 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2935 "Unable to load proxy CA config value!\n");
2936 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2937 "No proxy CA provided!\n");
2940 cafile = cafile_cfg;
2943 gnutls_global_init ();
2944 gnutls_x509_crt_init (&proxy_ca.cert);
2945 gnutls_x509_privkey_init (&proxy_ca.key);
2947 if ( (GNUNET_OK != load_cert_from_file (proxy_ca.cert, cafile)) ||
2948 (GNUNET_OK != load_key_from_file (proxy_ca.key, cafile)) )
2950 // FIXME: release resources...
2954 GNUNET_free_non_null (cafile_cfg);
2956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2957 "Loading Template\n");
2959 compile_regex (&re_dotplus, (char*) RE_A_HREF);
2961 gns_handle = GNUNET_GNS_connect (cfg);
2963 if (GNUNET_NO == load_local_zone_key (cfg))
2965 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2966 "Unable to load zone!\n");
2970 if (NULL == gns_handle)
2972 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2973 "Unable to connect to GNS!\n");
2977 memset (&sa, 0, sizeof (sa));
2978 sa.sin_family = AF_INET;
2979 sa.sin_port = htons (port);
2980 #if HAVE_SOCKADDR_IN_SIN_LEN
2981 sa.sin_len = sizeof (sa);
2984 lsock = GNUNET_NETWORK_socket_create (AF_INET,
2988 if ((NULL == lsock) ||
2990 GNUNET_NETWORK_socket_bind (lsock, (const struct sockaddr *) &sa,
2993 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2994 "Failed to create listen socket bound to `%s'",
2995 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
2997 GNUNET_NETWORK_socket_close (lsock);
3001 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
3003 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3004 "Failed to listen on socket bound to `%s'",
3005 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
3009 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
3010 lsock, &do_accept, NULL);
3015 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
3017 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3018 "cURL global init failed!\n");
3022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3023 "Proxy listens on port %u\n",
3026 mhd_httpd_head = NULL;
3027 mhd_httpd_tail = NULL;
3028 total_mhd_connections = 0;
3030 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
3034 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3035 "Specify PROXY_UNIXPATH in gns-proxy config section!\n");
3039 mhd_unix_socket = GNUNET_NETWORK_socket_create (AF_UNIX,
3043 if (NULL == mhd_unix_socket)
3045 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3046 "Unable to create unix domain socket!\n");
3050 mhd_unix_sock_addr.sun_family = AF_UNIX;
3051 strcpy (mhd_unix_sock_addr.sun_path, proxy_sockfile);
3054 mhd_unix_sock_addr.sun_path[0] = '\0';
3056 #if HAVE_SOCKADDR_IN_SIN_LEN
3057 mhd_unix_sock_addr.sun_len = (u_char) sizeof (struct sockaddr_un);
3060 len = strlen (proxy_sockfile) + sizeof(AF_UNIX);
3062 GNUNET_free (proxy_sockfile);
3064 if (GNUNET_OK != GNUNET_NETWORK_socket_bind (mhd_unix_socket,
3065 (struct sockaddr*)&mhd_unix_sock_addr,
3068 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3069 "Unable to bind unix domain socket!\n");
3073 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (mhd_unix_socket,
3076 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3077 "Unable to listen on unix domain socket!\n");
3081 hd = GNUNET_malloc (sizeof (struct MhdHttpList));
3082 hd->is_ssl = GNUNET_NO;
3083 strcpy (hd->domain, "");
3084 httpd = MHD_start_daemon (MHD_USE_DEBUG, 4444, //Dummy port
3086 &create_response, hd,
3087 MHD_OPTION_LISTEN_SOCKET, GNUNET_NETWORK_get_fd (mhd_unix_socket),
3088 MHD_OPTION_CONNECTION_LIMIT, MHD_MAX_CONNECTIONS,
3089 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
3090 MHD_OPTION_NOTIFY_COMPLETED,
3094 GNUNET_assert (httpd != NULL);
3096 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
3098 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
3102 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
3103 &do_shutdown, NULL);
3109 * The main function for gnunet-gns-proxy.
3111 * @param argc number of arguments from the command line
3112 * @param argv command line arguments
3113 * @return 0 ok, 1 on error
3116 main (int argc, char *const *argv)
3118 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
3120 gettext_noop ("listen on specified port"), 1,
3121 &GNUNET_GETOPT_set_string, &port},
3122 {'a', "authority", NULL,
3123 gettext_noop ("pem file to use as CA"), 1,
3124 &GNUNET_GETOPT_set_string, &cafile_opt},
3125 GNUNET_GETOPT_OPTION_END
3130 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
3134 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
3137 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
3138 _("GNUnet GNS proxy"),
3140 &run, NULL)) ? 0 : 1;
3141 GNUNET_free_non_null ((char*)argv);