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 <microhttpd.h>
24 #include <curl/curl.h>
26 #include "gns_proxy_proto.h"
29 #define GNUNET_GNS_PROXY_PORT 7777
31 //TODO maybe make this an api call
33 * Checks if name is in tld
35 * @param name the name to check
36 * @param tld the TLD to check for
37 * @return GNUNET_YES or GNUNET_NO
40 is_tld(const char* name, const char* tld)
44 if (strlen(name) <= strlen(tld))
49 offset = strlen(name)-strlen(tld);
50 if (strcmp (name+offset, tld) != 0)
52 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
53 "%s is not in .%s TLD\n", name, tld);
62 struct GNUNET_NETWORK_Handle *sock;
63 struct GNUNET_NETWORK_Handle *remote_sock;
67 GNUNET_SCHEDULER_TaskIdentifier rtask;
68 GNUNET_SCHEDULER_TaskIdentifier fwdrtask;
69 GNUNET_SCHEDULER_TaskIdentifier wtask;
70 GNUNET_SCHEDULER_TaskIdentifier fwdwtask;
74 unsigned int rbuf_len;
75 unsigned int wbuf_len;
79 #define BUF_WAIT_FOR_CURL 0
80 #define BUF_WAIT_FOR_MHD 1
81 #define HTML_HDR_CONTENT "Content-Type: text/html\r\n"
82 #define RE_DOTPLUS "<a href=\"http://(([A-Za-z]+[.])+)([+])"
83 #define RE_N_MATCHES 4
86 #define HTTPS_PORT 443
91 struct ProxyCurlTask *prev;
92 struct ProxyCurlTask *next;
96 char buffer[CURL_MAX_WRITE_SIZE];
99 unsigned int bytes_downloaded;
100 unsigned int bytes_in_buffer;
101 int download_in_progress;
102 int download_successful;
104 struct MHD_Connection *connection;
106 int is_postprocessing;
108 GNUNET_SCHEDULER_TaskIdentifier pp_task;
114 unsigned long port = GNUNET_GNS_PROXY_PORT;
115 static struct GNUNET_NETWORK_Handle *lsock;
116 GNUNET_SCHEDULER_TaskIdentifier ltask;
117 GNUNET_SCHEDULER_TaskIdentifier curl_download_task;
118 static struct MHD_Daemon *httpd;
119 static GNUNET_SCHEDULER_TaskIdentifier httpd_task;
122 struct ProxyCurlTask *ctasks_head;
123 struct ProxyCurlTask *ctasks_tail;
125 static regex_t re_dotplus;
128 * Read HTTP request header field 'Host'
130 * @param cls buffer to write to
131 * @param kind value kind
132 * @param key field key
133 * @param value field value
134 * @return MHD_NO when Host found
137 con_val_iter (void *cls,
138 enum MHD_ValueKind kind,
142 char* buf = (char*)cls;
144 if (0 == strcmp ("Host", key))
154 * Check HTTP response header for mime
156 * @param buffer curl buffer
157 * @param size curl blocksize
158 * @param nmemb curl blocknumber
160 * @return size of read bytes
163 curl_check_hdr (void *buffer, size_t size, size_t nmemb, void *cls)
165 size_t bytes = size * nmemb;
166 struct ProxyCurlTask *ctask = cls;
169 memcpy (hdr, buffer, bytes);
172 if (0 == strcmp (hdr, HTML_HDR_CONTENT))
174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
175 "Got HTML HTTP response header\n");
176 ctask->parse_content = GNUNET_YES;
190 * Process cURL download bits
192 * @param ptr buffer with data
193 * @param size size of a record
194 * @param nmemb number of records downloaded
196 * @return number of processed bytes
199 callback_download (void *ptr, size_t size, size_t nmemb, void *ctx)
201 const char *cbuf = ptr;
203 struct ProxyCurlTask *ctask = ctx;
208 ctask->bytes_downloaded += total;
215 if (total > sizeof (ctask->buffer))
217 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
218 "CURL gave us too much data to handle (%d)!\n",
223 if (ctask->buf_status == BUF_WAIT_FOR_MHD)
225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
226 "CURL: Waiting for MHD (%s)\n", ctask->url);
227 return CURL_WRITEFUNC_PAUSE;
231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
232 "CURL: Copying to MHD (%s, %d)\n", ctask->url, total);
233 memcpy (ctask->buffer, cbuf, total);
234 ctask->bytes_in_buffer = total;
235 ctask->buffer_ptr = ctask->buffer;
237 ctask->buf_status = BUF_WAIT_FOR_MHD;
239 //GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
240 // "cURL chunk:\n%s\n", (char*)ctask->buffer);
248 * Callback to free content
250 * @param cls content to free
253 mhd_content_free (void *cls)
255 struct ProxyCurlTask *ctask = cls;
257 if (ctask->curl != NULL)
258 curl_easy_cleanup (ctask->curl);
265 postprocess_name (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
267 struct ProxyCurlTask *ctask = cls;
268 char tmp[strlen(ctask->pp_buf)];
270 sprintf ( tmp, "<a href=http://%sxxx.gnunet", ctask->pp_buf);
272 strcpy (ctask->pp_buf, tmp);
274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
275 "Created %s\n", tmp);
282 * Callback for MHD response
285 * @param pos in buffer
287 * @param max space in buffer
290 mhd_content_cb (void *cls,
295 struct ProxyCurlTask *ctask = cls;
297 size_t bytes_to_copy;
300 regmatch_t m[RE_N_MATCHES];
302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
303 "MHD: content cb\n");
305 if (ctask->download_successful &&
306 (ctask->buf_status == BUF_WAIT_FOR_CURL))
308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
309 "MHD: sending response for %s\n", ctask->url);
310 ctask->download_in_progress = GNUNET_NO;
311 curl_multi_remove_handle (curl_multi, ctask->curl);
312 curl_easy_cleanup (ctask->curl);
313 return MHD_CONTENT_READER_END_OF_STREAM;
316 if (ctask->download_error &&
317 (ctask->buf_status == BUF_WAIT_FOR_CURL))
319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
320 "MHD: sending error response\n");
321 ctask->download_in_progress = GNUNET_NO;
322 curl_multi_remove_handle (curl_multi, ctask->curl);
323 curl_easy_cleanup (ctask->curl);
324 return MHD_CONTENT_READER_END_WITH_ERROR;
327 if ( ctask->buf_status == BUF_WAIT_FOR_CURL )
330 bytes_to_copy = ctask->bytes_in_buffer;
332 if (ctask->parse_content == GNUNET_YES)
335 GNUNET_log ( GNUNET_ERROR_TYPE_DEBUG,
336 "MHD: We need to parse the HTML %s\n", ctask->buffer_ptr);
338 nomatch = regexec ( &re_dotplus, ctask->buffer_ptr, RE_N_MATCHES, m, 0);
342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
345 GNUNET_assert (m[1].rm_so != -1);
347 hostptr = ctask->buffer_ptr+m[1].rm_so;
351 bytes_to_copy = m[0].rm_so;
352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
353 "Copying %d bytes.\n", m[0].rm_so);
359 if (ctask->is_postprocessing == GNUNET_YES)
363 if ( 0 == strcmp (ctask->pp_buf, "") )
366 ctask->is_postprocessing = GNUNET_NO;
368 ctask->bytes_in_buffer -= m[0].rm_eo;//(m[1].rm_eo-m[1].rm_so);
369 ctask->buffer_ptr += m[0].rm_eo;//(m[1].rm_eo-m[1].rm_so);
370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
371 "Skipping next %d bytes in buffer\n", m[0].rm_eo);
373 if ( strlen (ctask->pp_buf) <= max )
375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
376 "Copying postprocessed %s.\n", ctask->pp_buf);
377 memcpy ( buf, ctask->pp_buf, strlen (ctask->pp_buf) );
378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
380 ctask->is_postprocessing = GNUNET_NO;
381 return strlen (ctask->pp_buf);
387 memset (ctask->pp_buf, 0, sizeof(ctask->pp_buf));
388 memcpy (ctask->pp_buf, hostptr, (m[1].rm_eo-m[1].rm_so));
390 ctask->is_postprocessing = GNUNET_YES;
392 postprocess_name(ctask, NULL);
393 //ctask->pp_task = GNUNET_SCHEDULER_add_now (&postprocess_name, ctask);
400 if ( bytes_to_copy > max )
402 GNUNET_log ( GNUNET_ERROR_TYPE_DEBUG,
403 "MHD: buffer in response too small! (%s)\n",
405 memcpy ( buf, ctask->buffer_ptr, max);
406 ctask->bytes_in_buffer -= max;
407 ctask->buffer_ptr += max;
412 GNUNET_log ( GNUNET_ERROR_TYPE_DEBUG,
413 "MHD: copying %d bytes to mhd response at offset %d\n",
416 memcpy ( buf, ctask->buffer_ptr, bytes_to_copy );
417 copied = bytes_to_copy;
418 if (bytes_to_copy < ctask->bytes_in_buffer)
420 ctask->bytes_in_buffer -= bytes_to_copy;
421 ctask->buffer_ptr += bytes_to_copy;
425 ctask->bytes_in_buffer = 0;
426 ctask->buf_status = BUF_WAIT_FOR_CURL;
427 ctask->buffer_ptr = ctask->buffer;
428 curl_easy_pause (ctask->curl, CURLPAUSE_CONT);
438 * Task that is run when we are ready to receive more data
442 * @param tc task context
445 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
448 * Ask cURL for the select sets and schedule download
451 curl_download_prepare ()
458 struct GNUNET_NETWORK_FDSet *grs;
459 struct GNUNET_NETWORK_FDSet *gws;
461 struct GNUNET_TIME_Relative rtime;
467 mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max);
469 if (mret != CURLM_OK)
471 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
472 "%s failed at %s:%d: `%s'\n",
473 "curl_multi_fdset", __FILE__, __LINE__,
474 curl_multi_strerror (mret));
479 mret = curl_multi_timeout (curl_multi, &to);
480 rtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
483 "cURL multi fds: max=%d timeout=%llu\n", max, to);
485 grs = GNUNET_NETWORK_fdset_create ();
486 gws = GNUNET_NETWORK_fdset_create ();
487 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
488 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
490 "Scheduling task cURL\n");
492 if (curl_download_task != GNUNET_SCHEDULER_NO_TASK)
493 GNUNET_SCHEDULER_cancel (curl_download_task);
496 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
499 &curl_task_download, curl_multi);
500 GNUNET_NETWORK_fdset_destroy (gws);
501 GNUNET_NETWORK_fdset_destroy (grs);
507 * Task that is run when we are ready to receive more data
511 * @param tc task context
514 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
520 struct ProxyCurlTask *ctask;
523 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
525 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
528 "Shutdown requested while trying to download\n");
532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
540 mret = curl_multi_perform (curl_multi, &running);
542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
543 "Running curl tasks: %d\n", running);
546 for (; ctask != NULL; ctask = ctask->next)
548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
549 "CTask: %s\n", ctask->url);
553 if (num_ctasks != running)
555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
556 "%d ctasks, %d curl running\n", num_ctasks, running);
562 msg = curl_multi_info_read (curl_multi, &msgnum);
563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
564 "Messages left: %d\n", msgnum);
571 if ((msg->data.result != CURLE_OK) &&
572 (msg->data.result != CURLE_GOT_NOTHING))
574 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
575 "Download curl failed");
577 for (; ctask != NULL; ctask = ctask->next)
579 if (memcmp (msg->easy_handle, ctask->curl, sizeof (CURL)) != 0)
582 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
583 "Download curl failed for task %s: %s.\n",
585 curl_easy_strerror (msg->data.result));
586 ctask->download_successful = GNUNET_NO;
587 ctask->download_error = GNUNET_YES;
588 //curl_multi_remove_handle (curl_multi, ctask->curl);
589 //curl_easy_cleanup (ctask->curl);
590 GNUNET_CONTAINER_DLL_remove (ctasks_head, ctasks_tail,
594 GNUNET_assert (ctask != NULL);
598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
599 "cURL download completed.\n");
601 for (; ctask != NULL; ctask = ctask->next)
603 if (memcmp (msg->easy_handle, ctask->curl, sizeof (CURL)) != 0)
606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
607 "cURL task %s found.\n", ctask->url);
608 ctask->download_successful = GNUNET_YES;
609 //curl_multi_remove_handle (curl_multi, ctask->curl);
610 //curl_easy_cleanup (ctask->curl);
611 GNUNET_CONTAINER_DLL_remove (ctasks_head, ctasks_tail,
615 GNUNET_assert (ctask != NULL);
617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
618 "curl end %s\n", curl_easy_strerror(msg->data.result));
624 } while (msgnum > 0);
627 for (ctask=ctasks_head; ctask != NULL; ctask = ctask->next)
632 if (num_ctasks != running)
634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
635 "%d ctasks, %d curl running\n", num_ctasks, running);
638 GNUNET_assert ( num_ctasks == running );
642 } while (mret == CURLM_CALL_MULTI_PERFORM);
645 if (mret != CURLM_OK)
647 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s failed at %s:%d: `%s'\n",
648 "curl_multi_perform", __FILE__, __LINE__,
649 curl_multi_strerror (mret));
651 curl_download_prepare();
656 * Main MHD callback for handling requests.
659 * @param con MHD connection handle
660 * @param meth the HTTP method used ("GET", "PUT", etc.)
661 * @param ver the HTTP version string (i.e. "HTTP/1.1")
662 * @param upload_data the data being uploaded (excluding HEADERS,
663 * for a POST that fits into memory and that is encoded
664 * with a supported encoding, the POST data will NOT be
665 * given in upload_data and is instead available as
666 * part of MHD_get_connection_values; very large POST
667 * data *will* be made available incrementally in
669 * @param upload_data_size set initially to the size of the
670 * upload_data provided; the method must update this
671 * value to the number of bytes NOT processed;
672 * @param con_cls pointer to location where we store the 'struct Request'
673 * @return MHD_YES if the connection was handled successfully,
674 * MHD_NO if the socket must be closed due to a serious
675 * error while handling the request
678 create_response (void *cls,
679 struct MHD_Connection *con,
683 const char *upload_data,
684 size_t *upload_data_size,
688 const char* page = "<html><head><title>gnoxy</title>"\
689 "</head><body>cURL fail</body></html>";
690 struct MHD_Response *response;
696 struct ProxyCurlTask *ctask;
698 if (0 != strcmp (meth, "GET"))
700 if (&dummy != *con_cls)
706 if (0 != *upload_data_size)
711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
714 MHD_get_connection_values (con,
716 &con_val_iter, host);
720 ctask = GNUNET_malloc (sizeof (struct ProxyCurlTask));
721 ctask->curl = curl_easy_init();
723 if (curl_multi == NULL)
724 curl_multi = curl_multi_init ();
726 if ((ctask->curl == NULL) || (curl_multi == NULL))
728 response = MHD_create_response_from_buffer (strlen (page),
730 MHD_RESPMEM_PERSISTENT);
731 ret = MHD_queue_response (con,
734 MHD_destroy_response (response);
739 ctask->download_in_progress = GNUNET_YES;
740 ctask->download_successful = GNUNET_NO;
741 ctask->bytes_downloaded = 0;
742 ctask->connection = con;
743 ctask->buf_status = BUF_WAIT_FOR_CURL;
744 ctask->bytes_in_buffer = 0;
745 ctask->parse_content = GNUNET_NO;
747 curl_easy_setopt (ctask->curl, CURLOPT_HEADERFUNCTION, &curl_check_hdr);
748 curl_easy_setopt (ctask->curl, CURLOPT_HEADERDATA, ctask);
749 curl_easy_setopt (ctask->curl, CURLOPT_WRITEFUNCTION, &callback_download);
750 curl_easy_setopt (ctask->curl, CURLOPT_WRITEDATA, ctask);
751 curl_easy_setopt (ctask->curl, CURLOPT_FOLLOWLOCATION, 1);
752 curl_easy_setopt (ctask->curl, CURLOPT_MAXREDIRS, 4);
753 /* no need to abort if the above failed */
754 sprintf (curlurl, "http://%s%s", host, url);
755 strcpy (ctask->url, curlurl);
756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
757 "Adding new curl task for %s\n", curlurl);
759 curl_easy_setopt (ctask->curl, CURLOPT_URL, curlurl);
760 curl_easy_setopt (ctask->curl, CURLOPT_FAILONERROR, 1);
761 curl_easy_setopt (ctask->curl, CURLOPT_CONNECTTIMEOUT, 600L);
762 curl_easy_setopt (ctask->curl, CURLOPT_TIMEOUT, 600L);
764 mret = curl_multi_add_handle (curl_multi, ctask->curl);
766 if (mret != CURLM_OK)
768 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
769 "%s failed at %s:%d: `%s'\n",
770 "curl_multi_add_handle", __FILE__, __LINE__,
771 curl_multi_strerror (mret));
772 response = MHD_create_response_from_buffer (strlen (page),
774 MHD_RESPMEM_PERSISTENT);
775 ret = MHD_queue_response (con,
778 MHD_destroy_response (response);
780 curl_easy_cleanup (ctask->curl);
785 GNUNET_CONTAINER_DLL_insert (ctasks_head, ctasks_tail, ctask);
787 curl_download_prepare ();
789 response = MHD_create_response_from_callback (-1, -1,
794 ret = MHD_queue_response (con, MHD_HTTP_OK, response);
796 //MHD_destroy_response (response);
802 * Task run whenever HTTP server operations are pending.
805 * @param tc sched context
809 const struct GNUNET_SCHEDULER_TaskContext *tc);
821 struct GNUNET_NETWORK_FDSet *wrs;
822 struct GNUNET_NETWORK_FDSet *wws;
823 struct GNUNET_NETWORK_FDSet *wes;
826 unsigned MHD_LONG_LONG timeout;
827 struct GNUNET_TIME_Relative tv;
832 wrs = GNUNET_NETWORK_fdset_create ();
833 wes = GNUNET_NETWORK_fdset_create ();
834 wws = GNUNET_NETWORK_fdset_create ();
836 GNUNET_assert (MHD_YES == MHD_get_fdset (httpd, &rs, &ws, &es, &max));
839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
840 "MHD fds: max=%d\n", max);
842 haveto = MHD_get_timeout (httpd, &timeout);
844 if (haveto == MHD_YES)
845 tv.rel_value = (uint64_t) timeout;
847 tv = GNUNET_TIME_UNIT_FOREVER_REL;
848 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
849 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
850 GNUNET_NETWORK_fdset_copy_native (wes, &es, max + 1);
852 if (httpd_task != GNUNET_SCHEDULER_NO_TASK)
853 GNUNET_SCHEDULER_cancel (httpd_task);
855 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
858 GNUNET_NETWORK_fdset_destroy (wrs);
859 GNUNET_NETWORK_fdset_destroy (wws);
860 GNUNET_NETWORK_fdset_destroy (wes);
864 * Task run whenever HTTP server operations are pending.
867 * @param tc sched context
871 const struct GNUNET_SCHEDULER_TaskContext *tc)
873 httpd_task = GNUNET_SCHEDULER_NO_TASK;
874 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
881 * Read data from socket
883 * @param cls the closure
884 * @param tc scheduler context
887 do_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
890 * Read from remote end
893 * @param tc scheduler context
896 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
899 * Write data to remote socket
901 * @param cls the closure
902 * @param tc scheduler context
905 do_write_remote (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
907 struct Socks5Request *s5r = cls;
910 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
912 if ((NULL != tc->read_ready) &&
913 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->remote_sock)) &&
914 ((len = GNUNET_NETWORK_socket_send (s5r->remote_sock, s5r->rbuf,
917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
918 "Successfully sent %d bytes to remote socket\n",
923 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write remote");
925 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
926 GNUNET_SCHEDULER_cancel (s5r->rtask);
927 if (s5r->wtask != GNUNET_SCHEDULER_NO_TASK)
928 GNUNET_SCHEDULER_cancel (s5r->wtask);
929 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
930 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
931 GNUNET_NETWORK_socket_close (s5r->remote_sock);
932 GNUNET_NETWORK_socket_close (s5r->sock);
938 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
945 * Write data to socket
947 * @param cls the closure
948 * @param tc scheduler context
951 do_write (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
953 struct Socks5Request *s5r = cls;
956 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
958 if ((NULL != tc->read_ready) &&
959 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->sock)) &&
960 ((len = GNUNET_NETWORK_socket_send (s5r->sock, s5r->wbuf,
963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
964 "Successfully sent %d bytes to socket\n",
970 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write");
972 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
973 GNUNET_SCHEDULER_cancel (s5r->rtask);
974 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
975 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
976 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
977 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
978 GNUNET_NETWORK_socket_close (s5r->remote_sock);
979 GNUNET_NETWORK_socket_close (s5r->sock);
984 if ((s5r->state == SOCKS5_DATA_TRANSFER) &&
985 (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK))
987 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
989 &do_read_remote, s5r);
993 * Read from remote end
996 * @param tc scheduler context
999 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1001 struct Socks5Request *s5r = cls;
1003 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
1006 if ((NULL != tc->write_ready) &&
1007 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->remote_sock)) &&
1008 (s5r->wbuf_len = GNUNET_NETWORK_socket_recv (s5r->remote_sock, s5r->wbuf,
1009 sizeof (s5r->wbuf))))
1011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1012 "Successfully read %d bytes from remote socket\n",
1017 if (s5r->wbuf_len == 0)
1018 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1019 "0 bytes received from remote... graceful shutdown!\n");
1020 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
1021 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
1022 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
1023 GNUNET_SCHEDULER_cancel (s5r->rtask);
1025 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1026 s5r->remote_sock = NULL;
1027 GNUNET_NETWORK_socket_close (s5r->sock);
1033 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1041 add_handle_to_mhd (struct GNUNET_NETWORK_Handle *h)
1044 struct sockaddr *addr;
1047 fd = GNUNET_NETWORK_get_fd (h);
1048 addr = GNUNET_NETWORK_get_addr (h);
1049 len = GNUNET_NETWORK_get_addrlen (h);
1051 return MHD_add_connection (httpd, fd, addr, len);
1055 * Read data from incoming connection
1057 * @param cls the closure
1058 * @param tc the scheduler context
1061 do_read (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1063 struct Socks5Request *s5r = cls;
1064 struct socks5_client_hello *c_hello;
1065 struct socks5_server_hello *s_hello;
1066 struct socks5_client_request *c_req;
1067 struct socks5_server_response *s_resp;
1072 struct hostent *phost;
1074 struct sockaddr_in remote_addr;
1075 struct in_addr *r_sin_addr;
1077 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
1079 if ((NULL != tc->write_ready) &&
1080 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) &&
1081 (s5r->rbuf_len = GNUNET_NETWORK_socket_recv (s5r->sock, s5r->rbuf,
1082 sizeof (s5r->rbuf))))
1084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1085 "Successfully read %d bytes from socket\n",
1090 if (s5r->rbuf_len != 0)
1091 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "read");
1093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disco!\n");
1095 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
1096 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1097 if (s5r->wtask != GNUNET_SCHEDULER_NO_TASK)
1098 GNUNET_SCHEDULER_cancel (s5r->wtask);
1099 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
1100 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
1101 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1102 GNUNET_NETWORK_socket_close (s5r->sock);
1107 if (s5r->state == SOCKS5_INIT)
1109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1111 c_hello = (struct socks5_client_hello*)&s5r->rbuf;
1113 GNUNET_assert (c_hello->version == SOCKS_VERSION_5);
1115 s_hello = (struct socks5_server_hello*)&s5r->wbuf;
1116 s5r->wbuf_len = sizeof( struct socks5_server_hello );
1118 s_hello->version = c_hello->version;
1119 s_hello->auth_method = SOCKS_AUTH_NONE;
1121 /* Write response to client */
1122 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1126 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1130 s5r->state = SOCKS5_REQUEST;
1134 if (s5r->state == SOCKS5_REQUEST)
1136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1137 "Processing SOCKS5 request\n");
1138 c_req = (struct socks5_client_request*)&s5r->rbuf;
1139 s_resp = (struct socks5_server_response*)&s5r->wbuf;
1140 //Only 10byte for ipv4 response!
1141 s5r->wbuf_len = 10;//sizeof (struct socks5_server_response);
1143 GNUNET_assert (c_req->addr_type == 3);
1145 dom_len = *((uint8_t*)(&(c_req->addr_type) + 1));
1146 memset(domain, 0, sizeof(domain));
1147 strncpy(domain, (char*)(&(c_req->addr_type) + 2), dom_len);
1148 req_port = *((uint16_t*)(&(c_req->addr_type) + 2 + dom_len));
1150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1151 "Requested connection is %s:%d\n",
1155 if (is_tld (domain, GNUNET_GNS_TLD) ||
1156 is_tld (domain, GNUNET_GNS_TLD_ZKEY))
1158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1159 "Requested connection is gnunet tld\n",
1164 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1165 _("Failed to start HTTP server\n"));
1166 s_resp->version = 0x05;
1167 s_resp->reply = 0x01;
1169 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1173 //TODO! close socket after the write! schedule task
1174 //GNUNET_NETWORK_socket_close (s5r->sock);
1179 if (MHD_YES == add_handle_to_mhd ( s5r->sock ))
1180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1181 "Sucessfully added client to MHD!\n");
1182 s_resp->version = 0x05;
1183 s_resp->reply = 0x00;
1184 s_resp->reserved = 0x00;
1185 s_resp->addr_type = 0x01;
1188 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1192 //GNUNET_free ( s5r );
1193 //FIXME complete socks resp!
1198 phost = (struct hostent*)gethostbyname (domain);
1201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1202 "Resolve %s error!\n", domain );
1203 s_resp->version = 0x05;
1204 s_resp->reply = 0x01;
1206 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1210 //TODO! close socket after the write! schedule task
1211 //GNUNET_NETWORK_socket_close (s5r->sock);
1216 s5r->remote_sock = GNUNET_NETWORK_socket_create (AF_INET,
1219 r_sin_addr = (struct in_addr*)(phost->h_addr);
1220 remote_ip = r_sin_addr->s_addr;
1221 memset(&remote_addr, 0, sizeof(remote_addr));
1222 remote_addr.sin_family = AF_INET;
1223 #if HAVE_SOCKADDR_IN_SIN_LEN
1224 remote_addr.sin_len = sizeof (remote_addr);
1226 remote_addr.sin_addr.s_addr = remote_ip;
1227 remote_addr.sin_port = req_port;
1229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1230 "target server: %s:%u\n", inet_ntoa(remote_addr.sin_addr),
1234 GNUNET_NETWORK_socket_connect ( s5r->remote_sock,
1235 (const struct sockaddr*)&remote_addr,
1236 sizeof (remote_addr)))
1237 && (errno != EINPROGRESS))
1239 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "connect");
1240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1241 "socket request error...\n");
1242 s_resp->version = 0x05;
1243 s_resp->reply = 0x01;
1245 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1253 "new remote connection\n");
1255 s_resp->version = 0x05;
1256 s_resp->reply = 0x00;
1257 s_resp->reserved = 0x00;
1258 s_resp->addr_type = 0x01;
1260 s5r->state = SOCKS5_DATA_TRANSFER;
1263 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1267 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1275 if (s5r->state == SOCKS5_DATA_TRANSFER)
1277 if ((s5r->remote_sock == NULL) || (s5r->rbuf_len == 0))
1279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1280 "Closing connection to client\n");
1281 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
1282 GNUNET_SCHEDULER_cancel (s5r->rtask);
1283 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
1284 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
1285 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
1286 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1287 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
1288 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
1290 if (s5r->remote_sock != NULL)
1291 GNUNET_NETWORK_socket_close (s5r->remote_sock);
1292 GNUNET_NETWORK_socket_close (s5r->sock);
1297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1298 "forwarding %d bytes from client\n", s5r->rbuf_len);
1301 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
1303 &do_write_remote, s5r);
1305 if (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK)
1308 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1310 &do_read_remote, s5r);
1316 //GNUNET_CONTAINER_DLL_remove (s5conns.head, s5conns.tail, s5r);
1321 * Accept new incoming connections
1323 * @param cls the closure
1324 * @param tc the scheduler context
1327 do_accept (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1329 struct GNUNET_NETWORK_Handle *s;
1330 struct Socks5Request *s5r;
1332 ltask = GNUNET_SCHEDULER_NO_TASK;
1333 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1336 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1340 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
1344 GNUNET_log_strerror (GNUNET_ERROR_TYPE_INFO, "accept");
1348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1349 "Got an inbound connection, waiting for data\n");
1351 s5r = GNUNET_malloc (sizeof (struct Socks5Request));
1353 s5r->state = SOCKS5_INIT;
1354 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
1355 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
1356 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
1357 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1360 //GNUNET_CONTAINER_DLL_insert (s5conns.head, s5conns.tail, s5r);
1364 * Task run on shutdown
1366 * @param cls closure
1367 * @param tc task context
1370 do_shutdown (void *cls,
1371 const struct GNUNET_SCHEDULER_TaskContext *tc)
1373 if (GNUNET_SCHEDULER_NO_TASK != httpd_task)
1375 GNUNET_SCHEDULER_cancel (httpd_task);
1376 httpd_task = GNUNET_SCHEDULER_NO_TASK;
1379 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
1381 GNUNET_SCHEDULER_cancel (curl_download_task);
1382 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1387 MHD_stop_daemon (httpd);
1393 * Compiles a regex for us
1395 * @param re ptr to re struct
1396 * @param rt the expression to compile
1397 * @return 0 on success
1400 compile_regex (regex_t *re, const char* rt)
1405 status = regcomp (re, rt, REG_EXTENDED|REG_NEWLINE);
1408 regerror (status, re, err, 1024);
1409 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1410 "Regex error compiling '%s': %s\n", rt, err);
1417 * Main function that will be run
1419 * @param cls closure
1420 * @param args remaining command-line arguments
1421 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
1422 * @param cfg configuration
1425 run (void *cls, char *const *args, const char *cfgfile,
1426 const struct GNUNET_CONFIGURATION_Handle *cfg)
1428 struct sockaddr_in sa;
1430 compile_regex (&re_dotplus, (char*) RE_DOTPLUS);
1432 memset (&sa, 0, sizeof (sa));
1433 sa.sin_family = AF_INET;
1434 sa.sin_port = htons (port);
1435 #if HAVE_SOCKADDR_IN_SIN_LEN
1436 sa.sin_len = sizeof (sa);
1439 lsock = GNUNET_NETWORK_socket_create (AF_INET,
1443 if ((NULL == lsock) ||
1445 GNUNET_NETWORK_socket_bind (lsock, (const struct sockaddr *) &sa,
1448 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1449 "Failed to create listen socket bound to `%s'",
1450 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
1452 GNUNET_NETWORK_socket_close (lsock);
1456 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
1458 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1459 "Failed to listen on socket bound to `%s'",
1460 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
1464 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
1465 lsock, &do_accept, NULL);
1470 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
1472 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1473 "cURL global init failed!\n");
1477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1478 "Proxy listens on port %u\n",
1481 httpd = MHD_start_daemon (MHD_USE_DEBUG, 4444,
1483 &create_response, NULL,
1484 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 128,
1485 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
1486 MHD_OPTION_NOTIFY_COMPLETED,
1491 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1492 &do_shutdown, NULL);
1497 * The main function for gnunet-gns-proxy.
1499 * @param argc number of arguments from the command line
1500 * @param argv command line arguments
1501 * @return 0 ok, 1 on error
1504 main (int argc, char *const *argv)
1506 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
1508 gettext_noop ("listen on specified port"), 1,
1509 &GNUNET_GETOPT_set_string, &port},
1510 GNUNET_GETOPT_OPTION_END
1515 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
1518 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
1519 _("GNUnet GNS proxy"),
1521 &run, NULL)) ? 0 : 1;