2 This file is part of GNUnet.
3 (C) 2012-2013 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.
21 * @author Martin Schanzenbach
22 * @author Christian Grothoff
23 * @file src/gns/gnunet-gns-proxy.c
24 * @brief HTTP(S) proxy that rewrites URIs and fakes certificats to make GNS work
25 * with legacy browsers
28 * - double-check queueing logic
29 * - improve IPv6 support (#3037)
30 * - actually check SSL certificates (#3038)
33 #include <microhttpd.h>
34 #include <curl/curl.h>
35 #include <gnutls/gnutls.h>
36 #include <gnutls/x509.h>
37 #include <gnutls/abstract.h>
38 #include <gnutls/crypto.h>
40 #include "gnunet_util_lib.h"
41 #include "gnunet_gns_service.h"
42 #include "gnunet_identity_service.h"
47 * Default Socks5 listen port.
49 #define GNUNET_GNS_PROXY_PORT 7777
52 * Maximum supported length for a URI.
53 * Should die. @deprecated
55 #define MAX_HTTP_URI_LENGTH 2048
58 * Size of the buffer for the data upload / download. Must be
59 * enough for curl, thus CURL_MAX_WRITE_SIZE is needed here (16k).
61 #define IO_BUFFERSIZE CURL_MAX_WRITE_SIZE
64 * Size of the read/write buffers for Socks. Uses
65 * 256 bytes for the hostname (at most), plus a few
66 * bytes overhead for the messages.
68 #define SOCKS_BUFFERSIZE (256 + 32)
71 * Port for plaintext HTTP.
78 #define HTTPS_PORT 443
81 * Largest allowed size for a PEM certificate.
83 #define MAX_PEM_SIZE (10 * 1024)
86 * After how long do we clean up unused MHD SSL/TLS instances?
88 #define MHD_CACHE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
91 * After how long do we clean up Socks5 handles that failed to show any activity
92 * with their respective MHD instance?
94 #define HTTP_HANDSHAKE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
100 * @param level log level
101 * @param fun name of curl_easy-function that gave the error
102 * @param rc return code from curl
104 #define LOG_CURL_EASY(level,fun,rc) GNUNET_log(level, _("%s failed at %s:%d: `%s'\n"), fun, __FILE__, __LINE__, curl_easy_strerror (rc))
107 /* *************** Socks protocol definitions (move to TUN?) ****************** */
110 * Which SOCKS version do we speak?
112 #define SOCKS_VERSION_5 0x05
115 * Flag to set for 'no authentication'.
117 #define SOCKS_AUTH_NONE 0
121 * Commands in Socks5.
126 * Establish TCP/IP stream.
128 SOCKS5_CMD_TCP_STREAM = 1,
131 * Establish TCP port binding.
133 SOCKS5_CMD_TCP_PORT = 2,
136 * Establish UDP port binding.
138 SOCKS5_CMD_UDP_PORT = 3
143 * Address types in Socks5.
145 enum Socks5AddressType
155 SOCKS5_AT_DOMAINNAME = 3,
166 * Status codes in Socks5 response.
168 enum Socks5StatusCode
170 SOCKS5_STATUS_REQUEST_GRANTED = 0,
171 SOCKS5_STATUS_GENERAL_FAILURE = 1,
172 SOCKS5_STATUS_CONNECTION_NOT_ALLOWED_BY_RULE = 2,
173 SOCKS5_STATUS_NETWORK_UNREACHABLE = 3,
174 SOCKS5_STATUS_HOST_UNREACHABLE = 4,
175 SOCKS5_STATUS_CONNECTION_REFUSED_BY_HOST = 5,
176 SOCKS5_STATUS_TTL_EXPIRED = 6,
177 SOCKS5_STATUS_COMMAND_NOT_SUPPORTED = 7,
178 SOCKS5_STATUS_ADDRESS_TYPE_NOT_SUPPORTED = 8
183 * Client hello in Socks5 protocol.
185 struct Socks5ClientHelloMessage
188 * Should be #SOCKS_VERSION_5.
193 * How many authentication methods does the client support.
195 uint8_t num_auth_methods;
197 /* followed by supported authentication methods, 1 byte per method */
203 * Server hello in Socks5 protocol.
205 struct Socks5ServerHelloMessage
208 * Should be #SOCKS_VERSION_5.
213 * Chosen authentication method, for us always #SOCKS_AUTH_NONE,
214 * which skips the authentication step.
221 * Client socks request in Socks5 protocol.
223 struct Socks5ClientRequestMessage
226 * Should be #SOCKS_VERSION_5.
231 * Command code, we only uspport #SOCKS5_CMD_TCP_STREAM.
236 * Reserved, always zero.
241 * Address type, an `enum Socks5AddressType`.
246 * Followed by either an ip4/ipv6 address or a domain name with a
247 * length field (uint8_t) in front (depending on @e addr_type).
248 * followed by port number in network byte order (uint16_t).
254 * Server response to client requests in Socks5 protocol.
256 struct Socks5ServerResponseMessage
259 * Should be #SOCKS_VERSION_5.
264 * Status code, an `enum Socks5StatusCode`
274 * Address type, an `enum Socks5AddressType`.
279 * Followed by either an ip4/ipv6 address or a domain name with a
280 * length field (uint8_t) in front (depending on @e addr_type).
281 * followed by port number in network byte order (uint16_t).
288 /* *********************** Datastructures for HTTP handling ****************** */
291 * A structure for CA cert/key
298 gnutls_x509_crt_t cert;
303 gnutls_x509_privkey_t key;
308 * Structure for GNS certificates
310 struct ProxyGNSCertificate
313 * The certificate as PEM
315 char cert[MAX_PEM_SIZE];
318 * The private key as PEM
320 char key[MAX_PEM_SIZE];
326 * A structure for all running Httpds
333 struct MhdHttpList *prev;
338 struct MhdHttpList *next;
341 * the domain name to server (only important for SSL)
348 struct MHD_Daemon *daemon;
351 * Optional proxy certificate used
353 struct ProxyGNSCertificate *proxy_cert;
358 GNUNET_SCHEDULER_TaskIdentifier httpd_task;
361 * is this an ssl daemon?
368 /* ***************** Datastructures for Socks handling **************** */
377 * We're waiting to get the client hello.
382 * We're waiting to get the initial request.
387 * We are currently resolving the destination.
392 * We're in transfer mode.
394 SOCKS5_DATA_TRANSFER,
397 * Finish writing the write buffer, then clean up.
399 SOCKS5_WRITE_THEN_CLEANUP,
402 * Socket has been passed to MHD, do not close it anymore.
404 SOCKS5_SOCKET_WITH_MHD,
407 * We've finished receiving upload data from MHD.
409 SOCKS5_SOCKET_UPLOAD_STARTED,
412 * We've finished receiving upload data from MHD.
414 SOCKS5_SOCKET_UPLOAD_DONE,
417 * We've finished uploading data via CURL and can now download.
419 SOCKS5_SOCKET_DOWNLOAD_STARTED,
422 * We've finished receiving download data from cURL.
424 SOCKS5_SOCKET_DOWNLOAD_DONE
430 * A structure for socks requests
438 struct Socks5Request *next;
443 struct Socks5Request *prev;
448 struct GNUNET_NETWORK_Handle *sock;
451 * Handle to GNS lookup, during #SOCKS5_RESOLVING phase.
453 struct GNUNET_GNS_LookupRequest *gns_lookup;
456 * Client socket read task
458 GNUNET_SCHEDULER_TaskIdentifier rtask;
461 * Client socket write task
463 GNUNET_SCHEDULER_TaskIdentifier wtask;
468 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
473 char rbuf[SOCKS_BUFFERSIZE];
478 char wbuf[SOCKS_BUFFERSIZE];
481 * Buffer we use for moving data between MHD and curl (in both directions).
483 char io_buf[IO_BUFFERSIZE];
486 * MHD HTTP instance handling this request, NULL for none.
488 struct MhdHttpList *hd;
491 * MHD response object for this request.
493 struct MHD_Response *response;
496 * the domain name to server (only important for SSL)
501 * DNS Legacy Host Name as given by GNS, NULL if not given.
516 * HTTP request headers for the curl request.
518 struct curl_slist *headers;
521 * HTTP response code to give to MHD for the response.
523 unsigned int response_code;
526 * Number of bytes already in read buffer
531 * Number of bytes already in write buffer
536 * Number of bytes already in the IO buffer.
541 * Once known, what's the target address for the connection?
543 struct sockaddr_storage destination_address;
548 enum SocksPhase state;
551 * Desired destination port.
559 /* *********************** Globals **************************** */
563 * The port the proxy is running on (default 7777)
565 static unsigned long port = GNUNET_GNS_PROXY_PORT;
568 * The CA file (pem) to use for the proxy CA
570 static char *cafile_opt;
573 * The listen socket of the proxy
575 static struct GNUNET_NETWORK_Handle *lsock;
580 static GNUNET_SCHEDULER_TaskIdentifier ltask;
583 * The cURL download task (curl multi API).
585 static GNUNET_SCHEDULER_TaskIdentifier curl_download_task;
588 * The cURL multi handle
590 static CURLM *curl_multi;
593 * Handle to the GNS service
595 static struct GNUNET_GNS_Handle *gns_handle;
598 * DLL for http/https daemons
600 static struct MhdHttpList *mhd_httpd_head;
603 * DLL for http/https daemons
605 static struct MhdHttpList *mhd_httpd_tail;
608 * Daemon for HTTP (we have one per SSL certificate, and then one for
609 * all HTTP connections; this is the one for HTTP, not HTTPS).
611 static struct MhdHttpList *httpd;
614 * DLL of active socks requests.
616 static struct Socks5Request *s5r_head;
619 * DLL of active socks requests.
621 static struct Socks5Request *s5r_tail;
624 * The users local GNS master zone
626 static struct GNUNET_CRYPTO_EccPublicSignKey local_gns_zone;
629 * The users local shorten zone
631 static struct GNUNET_CRYPTO_EccPrivateKey local_shorten_zone;
634 * Is shortening enabled?
636 static int do_shorten;
639 * The CA for SSL certificate generation
641 static struct ProxyCA proxy_ca;
644 * Response we return on cURL failures.
646 static struct MHD_Response *curl_failure_response;
649 * Connection to identity service.
651 static struct GNUNET_IDENTITY_Handle *identity;
654 * Request for our ego.
656 static struct GNUNET_IDENTITY_Operation *id_op;
661 static const struct GNUNET_CONFIGURATION_Handle *cfg;
664 /* ************************* Global helpers ********************* */
668 * Run MHD now, we have extra data ready for the callback.
670 * @param hd the daemon to run now.
673 run_mhd_now (struct MhdHttpList *hd);
677 * Clean up s5r handles.
679 * @param s5r the handle to destroy
682 cleanup_s5r (struct Socks5Request *s5r)
684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
685 "Cleaning up socks request\n");
686 if (NULL != s5r->curl)
688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
689 "Cleaning up cURL handle\n");
690 curl_multi_remove_handle (curl_multi, s5r->curl);
691 curl_easy_cleanup (s5r->curl);
694 curl_slist_free_all (s5r->headers);
695 if ( (NULL != s5r->response) &&
696 (curl_failure_response != s5r->response) )
697 MHD_destroy_response (s5r->response);
698 if (GNUNET_SCHEDULER_NO_TASK != s5r->rtask)
699 GNUNET_SCHEDULER_cancel (s5r->rtask);
700 if (GNUNET_SCHEDULER_NO_TASK != s5r->timeout_task)
701 GNUNET_SCHEDULER_cancel (s5r->timeout_task);
702 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
703 GNUNET_SCHEDULER_cancel (s5r->wtask);
704 if (NULL != s5r->gns_lookup)
705 GNUNET_GNS_lookup_cancel (s5r->gns_lookup);
706 if (NULL != s5r->sock)
708 if (SOCKS5_SOCKET_WITH_MHD <= s5r->state)
709 GNUNET_NETWORK_socket_free_memory_only_ (s5r->sock);
711 GNUNET_NETWORK_socket_close (s5r->sock);
713 GNUNET_CONTAINER_DLL_remove (s5r_head,
716 GNUNET_free_non_null (s5r->domain);
717 GNUNET_free_non_null (s5r->leho);
718 GNUNET_free_non_null (s5r->url);
723 /* ************************* HTTP handling with cURL *********************** */
727 * Callback for MHD response generation. This function is called from
728 * MHD whenever MHD expects to get data back. Copies data from the
729 * io_buf, if available.
731 * @param cls closure with our `struct Socks5Request`
732 * @param pos in buffer
733 * @param buf where to copy data
734 * @param max available space in @a buf
735 * @return number of bytes written to @a buf
738 mhd_content_cb (void *cls,
743 struct Socks5Request *s5r = cls;
744 size_t bytes_to_copy;
746 if ( (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state) ||
747 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
749 /* we're still not done with the upload, do not yet
750 start the download, the IO buffer is still full
752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
753 "Pausing MHD download, not yet ready for download\n");
754 return 0; /* not yet ready for data download */
756 bytes_to_copy = GNUNET_MIN (max,
758 if ( (0 == bytes_to_copy) &&
759 (SOCKS5_SOCKET_DOWNLOAD_DONE != s5r->state) )
761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
762 "Pausing MHD download, no data available\n");
763 return 0; /* more data later */
765 if ( (0 == bytes_to_copy) &&
766 (SOCKS5_SOCKET_DOWNLOAD_DONE == s5r->state) )
768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
769 "Completed MHD download\n");
770 return MHD_CONTENT_READER_END_OF_STREAM;
772 memcpy (buf, s5r->io_buf, bytes_to_copy);
773 memmove (s5r->io_buf,
774 &s5r->io_buf[bytes_to_copy],
775 s5r->io_len - bytes_to_copy);
776 s5r->io_len -= bytes_to_copy;
777 if (NULL != s5r->curl)
778 curl_easy_pause (s5r->curl, CURLPAUSE_CONT);
779 return bytes_to_copy;
784 * Check that the website has presented us with a valid SSL certificate.
785 * The certificate must either match the domain name or the LEHO name
786 * (or, if available, the TLSA record).
788 * @param s5r request to check for.
789 * @return #GNUNET_OK if the certificate is valid
792 check_ssl_certificate (struct Socks5Request *s5r)
795 struct curl_slist *to_info;
796 struct curl_certinfo *to_certinfo;
799 struct curl_slist *slist;
803 curl_easy_getinfo (s5r->curl,
806 return GNUNET_SYSERR;
807 /* FIXME: for now, we just output the certs to stderr, we should
808 check them against LEHO / TLSA record information here! (#3038) */
809 if(NULL != ptr.to_info)
811 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
813 ptr.to_certinfo->num_of_certs);
814 for (i = 0; i < ptr.to_certinfo->num_of_certs; i++)
816 for (slist = ptr.to_certinfo->certinfo[i]; NULL != slist; slist = slist->next)
817 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
818 "Certificate #%d: %s\n",
828 * We're getting an HTTP response header from cURL. Convert it to the
829 * MHD response headers. Mostly copies the headers, but makes special
830 * adjustments to "Set-Cookie" and "Location" headers as those may need
831 * to be changed from the LEHO to the domain the browser expects.
833 * @param buffer curl buffer with a single line of header data; not 0-terminated!
834 * @param size curl blocksize
835 * @param nmemb curl blocknumber
836 * @param cls our `struct Socks5Request *`
837 * @return size of processed bytes
840 curl_check_hdr (void *buffer, size_t size, size_t nmemb, void *cls)
842 struct Socks5Request *s5r = cls;
843 size_t bytes = size * nmemb;
845 const char *hdr_type;
846 const char *cookie_domain;
849 char *new_cookie_hdr;
852 size_t delta_cdomain;
856 if (NULL == s5r->response)
858 /* first, check SSL certificate */
859 if ( (HTTPS_PORT == s5r->port) &&
860 (GNUNET_OK != check_ssl_certificate (s5r)) )
863 GNUNET_break (CURLE_OK ==
864 curl_easy_getinfo (s5r->curl,
865 CURLINFO_RESPONSE_CODE,
867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
868 "Creating MHD response with code %d\n",
870 s5r->response_code = resp_code;
871 s5r->response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
876 if (NULL != s5r->leho)
880 GNUNET_asprintf (&cors_hdr,
881 (HTTPS_PORT == s5r->port)
886 GNUNET_break (MHD_YES ==
887 MHD_add_response_header (s5r->response,
888 MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN,
890 GNUNET_free (cors_hdr);
892 /* force connection to be closed after each request, as we
893 do not support HTTP pipelining */
894 GNUNET_break (MHD_YES ==
895 MHD_add_response_header (s5r->response,
896 MHD_HTTP_HEADER_CONNECTION,
900 ndup = GNUNET_strndup (buffer, bytes);
901 hdr_type = strtok (ndup, ":");
902 if (NULL == hdr_type)
907 hdr_val = strtok (NULL, "");
916 /* custom logic for certain header types */
917 new_cookie_hdr = NULL;
918 if ( (NULL != s5r->leho) &&
919 (0 == strcasecmp (hdr_type,
920 MHD_HTTP_HEADER_SET_COOKIE)) )
923 new_cookie_hdr = GNUNET_malloc (strlen (hdr_val) +
924 strlen (s5r->domain) + 1);
926 domain_matched = GNUNET_NO; /* make sure we match domain at most once */
927 for (tok = strtok (hdr_val, ";"); NULL != tok; tok = strtok (NULL, ";"))
929 if ( (0 == strncasecmp (tok, " domain", strlen (" domain"))) &&
930 (GNUNET_NO == domain_matched) )
932 domain_matched = GNUNET_YES;
933 cookie_domain = tok + strlen (" domain") + 1;
934 if (strlen (cookie_domain) < strlen (s5r->leho))
936 delta_cdomain = strlen (s5r->leho) - strlen (cookie_domain);
937 if (0 == strcasecmp (cookie_domain, s5r->leho + delta_cdomain))
939 offset += sprintf (new_cookie_hdr + offset,
945 else if (0 == strcmp (cookie_domain, s5r->leho))
947 offset += sprintf (new_cookie_hdr + offset,
952 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
953 _("Cookie domain `%s' supplied by server is invalid\n"),
956 memcpy (new_cookie_hdr + offset, tok, strlen (tok));
957 offset += strlen (tok);
958 new_cookie_hdr[offset++] = ';';
960 hdr_val = new_cookie_hdr;
964 if (0 == strcasecmp (MHD_HTTP_HEADER_LOCATION, hdr_type))
968 GNUNET_asprintf (&leho_host,
969 (HTTPS_PORT != s5r->port)
973 if (0 == strncmp (leho_host,
977 GNUNET_asprintf (&new_location,
979 (HTTPS_PORT != s5r->port)
983 hdr_val + strlen (leho_host));
984 hdr_val = new_location;
986 GNUNET_free (leho_host);
988 /* MHD does not allow certain characters in values, remove those */
989 if (NULL != (tok = strchr (hdr_val, '\n')))
991 if (NULL != (tok = strchr (hdr_val, '\r')))
993 if (NULL != (tok = strchr (hdr_val, '\t')))
995 if (0 != strlen (hdr_val))
997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
998 "Adding header %s: %s to MHD response\n",
1001 GNUNET_break (MHD_YES ==
1002 MHD_add_response_header (s5r->response,
1007 GNUNET_free_non_null (new_cookie_hdr);
1008 GNUNET_free_non_null (new_location);
1014 * Handle response payload data from cURL. Copies it into our `io_buf` to make
1015 * it available to MHD.
1017 * @param ptr pointer to the data
1018 * @param size number of blocks of data
1019 * @param nmemb blocksize
1020 * @param ctx our `struct Socks5Request *`
1021 * @return number of bytes handled
1024 curl_download_cb (void *ptr, size_t size, size_t nmemb, void* ctx)
1026 struct Socks5Request *s5r = ctx;
1027 size_t total = size * nmemb;
1029 if ( (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state) ||
1030 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
1032 /* we're still not done with the upload, do not yet
1033 start the download, the IO buffer is still full
1034 with upload data. */
1035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1036 "Pausing CURL download, waiting for UPLOAD to finish\n");
1037 return CURL_WRITEFUNC_PAUSE; /* not yet ready for data download */
1039 if (sizeof (s5r->io_buf) - s5r->io_len < total)
1041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1042 "Pausing CURL download, not enough space\n");
1043 return CURL_WRITEFUNC_PAUSE; /* not enough space */
1045 memcpy (&s5r->io_buf[s5r->io_len],
1048 s5r->io_len += total;
1049 if (s5r->io_len == total)
1050 run_mhd_now (s5r->hd);
1056 * cURL callback for uploaded (PUT/POST) data. Copies it into our `io_buf`
1057 * to make it available to MHD.
1059 * @param buf where to write the data
1060 * @param size number of bytes per member
1061 * @param nmemb number of members available in @a buf
1062 * @param cls our `struct Socks5Request` that generated the data
1063 * @return number of bytes copied to @a buf
1066 curl_upload_cb (void *buf, size_t size, size_t nmemb, void *cls)
1068 struct Socks5Request *s5r = cls;
1069 size_t len = size * nmemb;
1072 if ( (0 == s5r->io_len) &&
1073 (SOCKS5_SOCKET_UPLOAD_DONE != s5r->state) )
1075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1076 "Pausing CURL UPLOAD, need more data\n");
1077 return CURL_READFUNC_PAUSE;
1079 if ( (0 == s5r->io_len) &&
1080 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
1082 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1084 "Completed CURL UPLOAD\n");
1085 return 0; /* upload finished, can now download */
1087 if ( (SOCKS5_SOCKET_UPLOAD_STARTED != s5r->state) ||
1088 (SOCKS5_SOCKET_UPLOAD_DONE != s5r->state) )
1091 return CURL_READFUNC_ABORT;
1093 to_copy = GNUNET_MIN (s5r->io_len,
1095 memcpy (buf, s5r->io_buf, to_copy);
1096 memmove (s5r->io_buf,
1097 &s5r->io_buf[to_copy],
1098 s5r->io_len - to_copy);
1099 s5r->io_len -= to_copy;
1100 if (s5r->io_len + to_copy == sizeof (s5r->io_buf))
1101 run_mhd_now (s5r->hd); /* got more space for upload now */
1106 /* ************************** main loop of cURL interaction ****************** */
1110 * Task that is run when we are ready to receive more data
1113 * @param cls closure
1114 * @param tc task context
1117 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1121 * Ask cURL for the select() sets and schedule cURL operations.
1124 curl_download_prepare ()
1131 struct GNUNET_NETWORK_FDSet *grs;
1132 struct GNUNET_NETWORK_FDSet *gws;
1134 struct GNUNET_TIME_Relative rtime;
1136 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
1138 GNUNET_SCHEDULER_cancel (curl_download_task);
1139 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1145 if (CURLM_OK != (mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max)))
1147 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1148 "%s failed at %s:%d: `%s'\n",
1149 "curl_multi_fdset", __FILE__, __LINE__,
1150 curl_multi_strerror (mret));
1154 GNUNET_break (CURLM_OK == curl_multi_timeout (curl_multi, &to));
1156 rtime = GNUNET_TIME_UNIT_FOREVER_REL;
1158 rtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1161 grs = GNUNET_NETWORK_fdset_create ();
1162 gws = GNUNET_NETWORK_fdset_create ();
1163 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1164 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1165 curl_download_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1168 &curl_task_download, curl_multi);
1169 GNUNET_NETWORK_fdset_destroy (gws);
1170 GNUNET_NETWORK_fdset_destroy (grs);
1174 curl_download_task = GNUNET_SCHEDULER_add_delayed (rtime,
1175 &curl_task_download,
1182 * Task that is run when we are ready to receive more data from curl.
1184 * @param cls closure, NULL
1185 * @param tc task context
1188 curl_task_download (void *cls,
1189 const struct GNUNET_SCHEDULER_TaskContext *tc)
1193 struct CURLMsg *msg;
1195 struct Socks5Request *s5r;
1197 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1201 mret = curl_multi_perform (curl_multi, &running);
1202 while (NULL != (msg = curl_multi_info_read (curl_multi, &msgnum)))
1204 GNUNET_break (CURLE_OK ==
1205 curl_easy_getinfo (msg->easy_handle,
1216 /* documentation says this is not used */
1220 switch (msg->data.result)
1223 case CURLE_GOT_NOTHING:
1224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1225 "CURL download completed.\n");
1226 s5r->state = SOCKS5_SOCKET_DOWNLOAD_DONE;
1227 run_mhd_now (s5r->hd);
1230 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1231 "Download curl failed: %s\n",
1232 curl_easy_strerror (msg->data.result));
1233 /* FIXME: indicate error somehow? close MHD connection badly as well? */
1234 s5r->state = SOCKS5_SOCKET_DOWNLOAD_DONE;
1235 run_mhd_now (s5r->hd);
1238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1239 "Cleaning up cURL handle\n");
1240 curl_multi_remove_handle (curl_multi, s5r->curl);
1241 curl_easy_cleanup (s5r->curl);
1243 if (NULL == s5r->response)
1244 s5r->response = curl_failure_response;
1247 /* documentation says this is not used */
1251 /* unexpected status code */
1256 } while (mret == CURLM_CALL_MULTI_PERFORM);
1257 if (CURLM_OK != mret)
1258 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1259 "%s failed at %s:%d: `%s'\n",
1260 "curl_multi_perform", __FILE__, __LINE__,
1261 curl_multi_strerror (mret));
1264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1265 "Suspending cURL multi loop, no more events pending\n");
1266 return; /* nothing more in progress */
1268 curl_download_prepare();
1272 /* ********************************* MHD response generation ******************* */
1276 * Read HTTP request header field from the request. Copies the fields
1277 * over to the 'headers' that will be given to curl. However, 'Host'
1278 * is substituted with the LEHO if present. We also change the
1279 * 'Connection' header value to "close" as the proxy does not support
1282 * @param cls our `struct Socks5Request`
1283 * @param kind value kind
1284 * @param key field key
1285 * @param value field value
1286 * @return #MHD_YES to continue to iterate
1289 con_val_iter (void *cls,
1290 enum MHD_ValueKind kind,
1294 struct Socks5Request *s5r = cls;
1297 if ( (0 == strcasecmp (MHD_HTTP_HEADER_HOST, key)) &&
1298 (NULL != s5r->leho) )
1300 if (0 == strcasecmp (MHD_HTTP_HEADER_CONNECTION, key))
1302 GNUNET_asprintf (&hdr,
1306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1307 "Adding HEADER `%s' to HTTP request\n",
1309 s5r->headers = curl_slist_append (s5r->headers,
1317 * Main MHD callback for handling requests.
1320 * @param con MHD connection handle
1321 * @param url the url in the request
1322 * @param meth the HTTP method used ("GET", "PUT", etc.)
1323 * @param ver the HTTP version string (i.e. "HTTP/1.1")
1324 * @param upload_data the data being uploaded (excluding HEADERS,
1325 * for a POST that fits into memory and that is encoded
1326 * with a supported encoding, the POST data will NOT be
1327 * given in upload_data and is instead available as
1328 * part of MHD_get_connection_values; very large POST
1329 * data *will* be made available incrementally in
1331 * @param upload_data_size set initially to the size of the
1332 * @a upload_data provided; the method must update this
1333 * value to the number of bytes NOT processed;
1334 * @param con_cls pointer to location where we store the 'struct Request'
1335 * @return #MHD_YES if the connection was handled successfully,
1336 * #MHD_NO if the socket must be closed due to a serious
1337 * error while handling the request
1340 create_response (void *cls,
1341 struct MHD_Connection *con,
1345 const char *upload_data,
1346 size_t *upload_data_size,
1349 /* struct MhdHttpList* hd = cls; */
1350 struct Socks5Request *s5r = *con_cls;
1352 char ipstring[INET6_ADDRSTRLEN];
1353 char ipaddr[INET6_ADDRSTRLEN + 2];
1354 const struct sockaddr *sa;
1355 const struct sockaddr_in *s4;
1356 const struct sockaddr_in6 *s6;
1365 if ( (NULL == s5r->curl) &&
1366 (SOCKS5_SOCKET_WITH_MHD == s5r->state) )
1368 /* first time here, initialize curl handle */
1369 sa = (const struct sockaddr *) &s5r->destination_address;
1370 switch (sa->sa_family)
1373 s4 = (const struct sockaddr_in *) &s5r->destination_address;
1374 if (NULL == inet_ntop (AF_INET,
1382 GNUNET_snprintf (ipaddr,
1386 port = ntohs (s4->sin_port);
1389 s6 = (const struct sockaddr_in6 *) &s5r->destination_address;
1390 if (NULL == inet_ntop (AF_INET6,
1398 GNUNET_snprintf (ipaddr,
1402 port = ntohs (s6->sin6_port);
1408 s5r->curl = curl_easy_init ();
1409 if (NULL == s5r->curl)
1410 return MHD_queue_response (con,
1411 MHD_HTTP_INTERNAL_SERVER_ERROR,
1412 curl_failure_response);
1413 curl_easy_setopt (s5r->curl, CURLOPT_HEADERFUNCTION, &curl_check_hdr);
1414 curl_easy_setopt (s5r->curl, CURLOPT_HEADERDATA, s5r);
1415 curl_easy_setopt (s5r->curl, CURLOPT_FOLLOWLOCATION, 0);
1416 curl_easy_setopt (s5r->curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
1417 curl_easy_setopt (s5r->curl, CURLOPT_CONNECTTIMEOUT, 600L);
1418 curl_easy_setopt (s5r->curl, CURLOPT_TIMEOUT, 600L);
1419 curl_easy_setopt (s5r->curl, CURLOPT_NOSIGNAL, 1L);
1420 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_CONTENT_DECODING, 0);
1421 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_TRANSFER_DECODING, 0);
1422 curl_easy_setopt (s5r->curl, CURLOPT_NOSIGNAL, 1L);
1423 curl_easy_setopt (s5r->curl, CURLOPT_PRIVATE, s5r);
1424 curl_easy_setopt (s5r->curl, CURLOPT_VERBOSE, 0); // FIXME: remove later
1425 GNUNET_asprintf (&curlurl,
1426 (HTTPS_PORT != s5r->port)
1428 : "https://%s:%d%s",
1432 curl_easy_setopt (s5r->curl,
1435 GNUNET_free (curlurl);
1437 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_PUT))
1439 s5r->state = SOCKS5_SOCKET_UPLOAD_STARTED;
1440 curl_easy_setopt (s5r->curl, CURLOPT_UPLOAD, 1);
1441 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1442 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1443 curl_easy_setopt (s5r->curl, CURLOPT_READFUNCTION, &curl_upload_cb);
1444 curl_easy_setopt (s5r->curl, CURLOPT_READDATA, s5r);
1446 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_POST))
1448 s5r->state = SOCKS5_SOCKET_UPLOAD_STARTED;
1449 curl_easy_setopt (s5r->curl, CURLOPT_POST, 1);
1450 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1451 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1452 curl_easy_setopt (s5r->curl, CURLOPT_READFUNCTION, &curl_upload_cb);
1453 curl_easy_setopt (s5r->curl, CURLOPT_READDATA, s5r);
1455 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_HEAD))
1457 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1458 curl_easy_setopt (s5r->curl, CURLOPT_NOBODY, 1);
1460 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_GET))
1462 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1463 curl_easy_setopt (s5r->curl, CURLOPT_HTTPGET, 1);
1464 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1465 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1469 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1470 _("Unsupported HTTP method `%s'\n"),
1472 curl_easy_cleanup (s5r->curl);
1477 if (0 == strcasecmp (ver, MHD_HTTP_VERSION_1_0))
1479 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
1481 else if (0 == strcasecmp (ver, MHD_HTTP_VERSION_1_1))
1483 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
1487 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_NONE);
1490 if (HTTPS_PORT == s5r->port)
1492 curl_easy_setopt (s5r->curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
1493 curl_easy_setopt (s5r->curl, CURLOPT_SSL_VERIFYPEER, 1L);
1494 /* Disable cURL checking the hostname, as we will check ourselves
1495 as only we have the domain name or the LEHO or the DANE record */
1496 curl_easy_setopt (s5r->curl, CURLOPT_SSL_VERIFYHOST, 0L);
1500 curl_easy_setopt (s5r->curl, CURLOPT_USE_SSL, CURLUSESSL_NONE);
1503 if (CURLM_OK != curl_multi_add_handle (curl_multi, s5r->curl))
1506 curl_easy_cleanup (s5r->curl);
1510 MHD_get_connection_values (con,
1512 &con_val_iter, s5r);
1513 curl_easy_setopt (s5r->curl, CURLOPT_HTTPHEADER, s5r->headers);
1514 curl_download_prepare ();
1518 /* continuing to process request */
1519 if (0 != *upload_data_size)
1521 left = GNUNET_MIN (*upload_data_size,
1522 sizeof (s5r->io_buf) - s5r->io_len);
1523 memcpy (&s5r->io_buf[s5r->io_len],
1526 s5r->io_len += left;
1527 *upload_data_size -= left;
1528 GNUNET_assert (NULL != s5r->curl);
1529 curl_easy_pause (s5r->curl, CURLPAUSE_CONT);
1530 curl_download_prepare ();
1533 if (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state)
1535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1536 "Finished processing UPLOAD\n");
1537 s5r->state = SOCKS5_SOCKET_UPLOAD_DONE;
1539 if (NULL == s5r->response)
1540 return MHD_YES; /* too early to queue response, did not yet get headers from cURL */
1541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1542 "Queueing response with MHD\n");
1543 return MHD_queue_response (con,
1549 /* ******************** MHD HTTP setup and event loop ******************** */
1553 * Function called when MHD decides that we are done with a connection.
1556 * @param connection connection handle
1557 * @param con_cls value as set by the last call to
1558 * the #MHD_AccessHandlerCallback, should be our `struct Socks5Request`
1559 * @param toe reason for request termination (ignored)
1562 mhd_completed_cb (void *cls,
1563 struct MHD_Connection *connection,
1565 enum MHD_RequestTerminationCode toe)
1567 struct Socks5Request *s5r = *con_cls;
1571 if (MHD_REQUEST_TERMINATED_COMPLETED_OK != toe)
1572 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1573 "MHD encountered error handling request: %d\n",
1581 * Function called when MHD first processes an incoming connection.
1582 * Gives us the respective URI information.
1584 * We use this to associate the `struct MHD_Connection` with our
1585 * internal `struct Socks5Request` data structure (by checking
1586 * for matching sockets).
1588 * @param cls the HTTP server handle (a `struct MhdHttpList`)
1589 * @param url the URL that is being requested
1590 * @param connection MHD connection object for the request
1591 * @return the `struct Socks5Request` that this @a connection is for
1594 mhd_log_callback (void *cls,
1596 struct MHD_Connection *connection)
1598 struct Socks5Request *s5r;
1599 const union MHD_ConnectionInfo *ci;
1602 ci = MHD_get_connection_info (connection,
1603 MHD_CONNECTION_INFO_CONNECTION_FD);
1609 sock = ci->connect_fd;
1610 for (s5r = s5r_head; NULL != s5r; s5r = s5r->next)
1612 if (GNUNET_NETWORK_get_fd (s5r->sock) == sock)
1614 if (NULL != s5r->url)
1619 s5r->url = GNUNET_strdup (url);
1620 GNUNET_SCHEDULER_cancel (s5r->timeout_task);
1621 s5r->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1630 * Kill the given MHD daemon.
1632 * @param hd daemon to stop
1635 kill_httpd (struct MhdHttpList *hd)
1637 GNUNET_CONTAINER_DLL_remove (mhd_httpd_head,
1640 GNUNET_free_non_null (hd->domain);
1641 MHD_stop_daemon (hd->daemon);
1642 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1644 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1645 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1647 GNUNET_free_non_null (hd->proxy_cert);
1655 * Task run whenever HTTP server is idle for too long. Kill it.
1657 * @param cls the `struct MhdHttpList *`
1658 * @param tc sched context
1661 kill_httpd_task (void *cls,
1662 const struct GNUNET_SCHEDULER_TaskContext *tc)
1664 struct MhdHttpList *hd = cls;
1666 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1672 * Task run whenever HTTP server operations are pending.
1674 * @param cls the `struct MhdHttpList *` of the daemon that is being run
1675 * @param tc sched context
1678 do_httpd (void *cls,
1679 const struct GNUNET_SCHEDULER_TaskContext *tc);
1683 * Schedule MHD. This function should be called initially when an
1684 * MHD is first getting its client socket, and will then automatically
1685 * always be called later whenever there is work to be done.
1687 * @param hd the daemon to schedule
1690 schedule_httpd (struct MhdHttpList *hd)
1695 struct GNUNET_NETWORK_FDSet *wrs;
1696 struct GNUNET_NETWORK_FDSet *wws;
1699 MHD_UNSIGNED_LONG_LONG timeout;
1700 struct GNUNET_TIME_Relative tv;
1706 if (MHD_YES != MHD_get_fdset (hd->daemon, &rs, &ws, &es, &max))
1711 haveto = MHD_get_timeout (hd->daemon, &timeout);
1712 if (MHD_YES == haveto)
1713 tv.rel_value_us = (uint64_t) timeout * 1000LL;
1715 tv = GNUNET_TIME_UNIT_FOREVER_REL;
1718 wrs = GNUNET_NETWORK_fdset_create ();
1719 wws = GNUNET_NETWORK_fdset_create ();
1720 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
1721 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
1728 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1729 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1730 if ( (MHD_YES != haveto) &&
1734 /* daemon is idle, kill after timeout */
1735 hd->httpd_task = GNUNET_SCHEDULER_add_delayed (MHD_CACHE_TIMEOUT,
1742 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1747 GNUNET_NETWORK_fdset_destroy (wrs);
1749 GNUNET_NETWORK_fdset_destroy (wws);
1754 * Task run whenever HTTP server operations are pending.
1756 * @param cls the `struct MhdHttpList` of the daemon that is being run
1757 * @param tc scheduler context
1760 do_httpd (void *cls,
1761 const struct GNUNET_SCHEDULER_TaskContext *tc)
1763 struct MhdHttpList *hd = cls;
1765 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1766 MHD_run (hd->daemon);
1767 schedule_httpd (hd);
1772 * Run MHD now, we have extra data ready for the callback.
1774 * @param hd the daemon to run now.
1777 run_mhd_now (struct MhdHttpList *hd)
1779 if (GNUNET_SCHEDULER_NO_TASK !=
1781 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1782 hd->httpd_task = GNUNET_SCHEDULER_add_now (&do_httpd,
1788 * Read file in filename
1790 * @param filename file to read
1791 * @param size pointer where filesize is stored
1792 * @return NULL on error
1795 load_file (const char* filename,
1802 GNUNET_DISK_file_size (filename, &fsize,
1803 GNUNET_YES, GNUNET_YES))
1805 if (fsize > MAX_PEM_SIZE)
1807 *size = (unsigned int) fsize;
1808 buffer = GNUNET_malloc (*size);
1809 if (fsize != GNUNET_DISK_fn_read (filename, buffer, (size_t) fsize))
1811 GNUNET_free (buffer);
1819 * Load PEM key from file
1821 * @param key where to store the data
1822 * @param keyfile path to the PEM file
1823 * @return #GNUNET_OK on success
1826 load_key_from_file (gnutls_x509_privkey_t key,
1827 const char* keyfile)
1829 gnutls_datum_t key_data;
1832 key_data.data = load_file (keyfile, &key_data.size);
1833 ret = gnutls_x509_privkey_import (key, &key_data,
1834 GNUTLS_X509_FMT_PEM);
1835 if (GNUTLS_E_SUCCESS != ret)
1837 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1838 _("Unable to import private key from file `%s'\n"),
1841 GNUNET_free_non_null (key_data.data);
1842 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
1847 * Load cert from file
1849 * @param crt struct to store data in
1850 * @param certfile path to pem file
1851 * @return #GNUNET_OK on success
1854 load_cert_from_file (gnutls_x509_crt_t crt,
1855 const char* certfile)
1857 gnutls_datum_t cert_data;
1860 cert_data.data = load_file (certfile, &cert_data.size);
1861 ret = gnutls_x509_crt_import (crt, &cert_data,
1862 GNUTLS_X509_FMT_PEM);
1863 if (GNUTLS_E_SUCCESS != ret)
1865 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1866 _("Unable to import certificate %s\n"), certfile);
1868 GNUNET_free_non_null (cert_data.data);
1869 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
1874 * Generate new certificate for specific name
1876 * @param name the subject name to generate a cert for
1877 * @return a struct holding the PEM data, NULL on error
1879 static struct ProxyGNSCertificate *
1880 generate_gns_certificate (const char *name)
1882 unsigned int serial;
1883 size_t key_buf_size;
1884 size_t cert_buf_size;
1885 gnutls_x509_crt_t request;
1888 struct ProxyGNSCertificate *pgc;
1890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1891 "Generating TLS/SSL certificate for `%s'\n",
1893 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_init (&request));
1894 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_set_key (request, proxy_ca.key));
1895 pgc = GNUNET_new (struct ProxyGNSCertificate);
1896 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COUNTRY_NAME,
1898 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_ORGANIZATION_NAME,
1899 0, "GNU Name System", 4);
1900 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COMMON_NAME,
1901 0, name, strlen (name));
1902 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_set_version (request, 3));
1903 gnutls_rnd (GNUTLS_RND_NONCE, &serial, sizeof (serial));
1904 gnutls_x509_crt_set_serial (request,
1907 etime = time (NULL);
1908 tm_data = localtime (&etime);
1909 gnutls_x509_crt_set_activation_time (request,
1912 etime = mktime (tm_data);
1913 gnutls_x509_crt_set_expiration_time (request,
1915 gnutls_x509_crt_sign (request,
1918 key_buf_size = sizeof (pgc->key);
1919 cert_buf_size = sizeof (pgc->cert);
1920 gnutls_x509_crt_export (request, GNUTLS_X509_FMT_PEM,
1921 pgc->cert, &cert_buf_size);
1922 gnutls_x509_privkey_export (proxy_ca.key, GNUTLS_X509_FMT_PEM,
1923 pgc->key, &key_buf_size);
1924 gnutls_x509_crt_deinit (request);
1930 * Lookup (or create) an SSL MHD instance for a particular domain.
1932 * @param domain the domain the SSL daemon has to serve
1933 * @return NULL on errro
1935 static struct MhdHttpList *
1936 lookup_ssl_httpd (const char* domain)
1938 struct MhdHttpList *hd;
1939 struct ProxyGNSCertificate *pgc;
1941 for (hd = mhd_httpd_head; NULL != hd; hd = hd->next)
1942 if ( (NULL != hd->domain) &&
1943 (0 == strcmp (hd->domain, domain)) )
1945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1946 "Starting fresh MHD HTTPS instance for domain `%s'\n",
1948 pgc = generate_gns_certificate (domain);
1949 hd = GNUNET_new (struct MhdHttpList);
1950 hd->is_ssl = GNUNET_YES;
1951 hd->domain = GNUNET_strdup (domain);
1952 hd->proxy_cert = pgc;
1953 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_SSL | MHD_USE_NO_LISTEN_SOCKET,
1956 &create_response, hd,
1957 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
1958 MHD_OPTION_NOTIFY_COMPLETED, &mhd_completed_cb, NULL,
1959 MHD_OPTION_URI_LOG_CALLBACK, &mhd_log_callback, NULL,
1960 MHD_OPTION_HTTPS_MEM_KEY, pgc->key,
1961 MHD_OPTION_HTTPS_MEM_CERT, pgc->cert,
1963 if (NULL == hd->daemon)
1969 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head,
1977 * Task run when a Socks5Request somehow fails to be associated with
1978 * an MHD connection (i.e. because the client never speaks HTTP after
1979 * the SOCKS5 handshake). Clean up.
1981 * @param cls the `struct Socks5Request *`
1982 * @param tc sched context
1985 timeout_s5r_handshake (void *cls,
1986 const struct GNUNET_SCHEDULER_TaskContext *tc)
1988 struct Socks5Request *s5r = cls;
1990 s5r->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1996 * We're done with the Socks5 protocol, now we need to pass the
1997 * connection data through to the final destination, either
1998 * direct (if the protocol might not be HTTP), or via MHD
1999 * (if the port looks like it should be HTTP).
2001 * @param s5r socks request that has reached the final stage
2004 setup_data_transfer (struct Socks5Request *s5r)
2006 struct MhdHttpList *hd;
2008 const struct sockaddr *addr;
2014 hd = lookup_ssl_httpd (s5r->domain);
2017 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2018 _("Failed to start HTTPS server for `%s'\n"),
2026 GNUNET_assert (NULL != httpd);
2030 fd = GNUNET_NETWORK_get_fd (s5r->sock);
2031 addr = GNUNET_NETWORK_get_addr (s5r->sock);
2032 len = GNUNET_NETWORK_get_addrlen (s5r->sock);
2033 s5r->state = SOCKS5_SOCKET_WITH_MHD;
2034 if (MHD_YES != MHD_add_connection (hd->daemon, fd, addr, len))
2036 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2037 _("Failed to pass client to MHD\n"));
2042 schedule_httpd (hd);
2043 s5r->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_HANDSHAKE_TIMEOUT,
2044 &timeout_s5r_handshake,
2049 /* ********************* SOCKS handling ************************* */
2053 * Write data from buffer to socks5 client, then continue with state machine.
2055 * @param cls the closure with the `struct Socks5Request`
2056 * @param tc scheduler context
2059 do_write (void *cls,
2060 const struct GNUNET_SCHEDULER_TaskContext *tc)
2062 struct Socks5Request *s5r = cls;
2065 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
2066 len = GNUNET_NETWORK_socket_send (s5r->sock,
2071 /* write error: connection closed, shutdown, etc.; just clean up */
2077 s5r->wbuf_len - len);
2078 s5r->wbuf_len -= len;
2079 if (s5r->wbuf_len > 0)
2081 /* not done writing */
2083 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2089 /* we're done writing, continue with state machine! */
2096 case SOCKS5_REQUEST:
2097 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s5r->rtask);
2099 case SOCKS5_DATA_TRANSFER:
2100 setup_data_transfer (s5r);
2102 case SOCKS5_WRITE_THEN_CLEANUP:
2113 * Return a server response message indicating a failure to the client.
2115 * @param s5r request to return failure code for
2116 * @param sc status code to return
2119 signal_socks_failure (struct Socks5Request *s5r,
2120 enum Socks5StatusCode sc)
2122 struct Socks5ServerResponseMessage *s_resp;
2124 s_resp = (struct Socks5ServerResponseMessage *) &s5r->wbuf[s5r->wbuf_len];
2125 memset (s_resp, 0, sizeof (struct Socks5ServerResponseMessage));
2126 s_resp->version = SOCKS_VERSION_5;
2128 s5r->state = SOCKS5_WRITE_THEN_CLEANUP;
2129 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
2131 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2138 * Return a server response message indicating success.
2140 * @param s5r request to return success status message for
2143 signal_socks_success (struct Socks5Request *s5r)
2145 struct Socks5ServerResponseMessage *s_resp;
2147 s_resp = (struct Socks5ServerResponseMessage *) &s5r->wbuf[s5r->wbuf_len];
2148 s_resp->version = SOCKS_VERSION_5;
2149 s_resp->reply = SOCKS5_STATUS_REQUEST_GRANTED;
2150 s_resp->reserved = 0;
2151 s_resp->addr_type = SOCKS5_AT_IPV4;
2152 /* zero out IPv4 address and port */
2155 sizeof (struct in_addr) + sizeof (uint16_t));
2156 s5r->wbuf_len += sizeof (struct Socks5ServerResponseMessage) +
2157 sizeof (struct in_addr) + sizeof (uint16_t);
2158 if (GNUNET_SCHEDULER_NO_TASK == s5r->wtask)
2160 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2167 * Process GNS results for target domain.
2169 * @param cls the `struct Socks5Request`
2170 * @param rd_count number of records returned
2171 * @param rd record data
2174 handle_gns_result (void *cls,
2176 const struct GNUNET_NAMESTORE_RecordData *rd)
2178 struct Socks5Request *s5r = cls;
2180 const struct GNUNET_NAMESTORE_RecordData *r;
2183 s5r->gns_lookup = NULL;
2185 for (i=0;i<rd_count;i++)
2188 switch (r->record_type)
2190 case GNUNET_DNSPARSER_TYPE_A:
2192 struct sockaddr_in *in;
2194 if (sizeof (struct in_addr) != r->data_size)
2196 GNUNET_break_op (0);
2199 if (GNUNET_YES == got_ip)
2202 GNUNET_NETWORK_test_pf (PF_INET))
2204 got_ip = GNUNET_YES;
2205 in = (struct sockaddr_in *) &s5r->destination_address;
2206 in->sin_family = AF_INET;
2207 memcpy (&in->sin_addr,
2210 in->sin_port = htons (s5r->port);
2211 #if HAVE_SOCKADDR_IN_SIN_LEN
2212 in->sin_len = sizeof (*in);
2216 case GNUNET_DNSPARSER_TYPE_AAAA:
2218 struct sockaddr_in6 *in;
2220 if (sizeof (struct in6_addr) != r->data_size)
2222 GNUNET_break_op (0);
2225 if (GNUNET_YES == got_ip)
2228 GNUNET_NETWORK_test_pf (PF_INET))
2230 /* FIXME: allow user to disable IPv6 per configuration option... */
2231 got_ip = GNUNET_YES;
2232 in = (struct sockaddr_in6 *) &s5r->destination_address;
2233 in->sin6_family = AF_INET6;
2234 memcpy (&in->sin6_addr,
2237 in->sin6_port = htons (s5r->port);
2238 #if HAVE_SOCKADDR_IN_SIN_LEN
2239 in->sin6_len = sizeof (*in);
2243 case GNUNET_NAMESTORE_TYPE_VPN:
2244 GNUNET_break (0); /* should have been translated within GNS */
2246 case GNUNET_NAMESTORE_TYPE_LEHO:
2247 GNUNET_free_non_null (s5r->leho);
2248 s5r->leho = GNUNET_strndup (r->data,
2256 if (GNUNET_YES != got_ip)
2258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2259 "Name resolution failed to yield useful IP address.\n");
2260 signal_socks_failure (s5r,
2261 SOCKS5_STATUS_GENERAL_FAILURE);
2264 s5r->state = SOCKS5_DATA_TRANSFER;
2265 signal_socks_success (s5r);
2270 * Remove the first @a len bytes from the beginning of the read buffer.
2272 * @param s5r the handle clear the read buffer for
2273 * @param len number of bytes in read buffer to advance
2276 clear_from_s5r_rbuf (struct Socks5Request *s5r,
2279 GNUNET_assert (len <= s5r->rbuf_len);
2282 s5r->rbuf_len - len);
2283 s5r->rbuf_len -= len;
2288 * Read data from incoming Socks5 connection
2290 * @param cls the closure with the `struct Socks5Request`
2291 * @param tc the scheduler context
2294 do_s5r_read (void *cls,
2295 const struct GNUNET_SCHEDULER_TaskContext *tc)
2297 struct Socks5Request *s5r = cls;
2298 const struct Socks5ClientHelloMessage *c_hello;
2299 struct Socks5ServerHelloMessage *s_hello;
2300 const struct Socks5ClientRequestMessage *c_req;
2304 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2305 if ( (NULL != tc->read_ready) &&
2306 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) )
2308 rlen = GNUNET_NETWORK_socket_recv (s5r->sock,
2309 &s5r->rbuf[s5r->rbuf_len],
2310 sizeof (s5r->rbuf) - s5r->rbuf_len);
2313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2314 "socks5 client disconnected.\n");
2318 s5r->rbuf_len += rlen;
2320 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2324 "Processing %u bytes of socks data in state %d\n",
2330 c_hello = (const struct Socks5ClientHelloMessage*) &s5r->rbuf;
2331 if ( (s5r->rbuf_len < sizeof (struct Socks5ClientHelloMessage)) ||
2332 (s5r->rbuf_len < sizeof (struct Socks5ClientHelloMessage) + c_hello->num_auth_methods) )
2333 return; /* need more data */
2334 if (SOCKS_VERSION_5 != c_hello->version)
2336 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2337 _("Unsupported socks version %d\n"),
2338 (int) c_hello->version);
2342 clear_from_s5r_rbuf (s5r,
2343 sizeof (struct Socks5ClientHelloMessage) + c_hello->num_auth_methods);
2344 GNUNET_assert (0 == s5r->wbuf_len);
2345 s_hello = (struct Socks5ServerHelloMessage *) &s5r->wbuf;
2346 s5r->wbuf_len = sizeof (struct Socks5ServerHelloMessage);
2347 s_hello->version = SOCKS_VERSION_5;
2348 s_hello->auth_method = SOCKS_AUTH_NONE;
2349 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s5r->wtask);
2350 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2353 s5r->state = SOCKS5_REQUEST;
2355 case SOCKS5_REQUEST:
2356 c_req = (const struct Socks5ClientRequestMessage *) &s5r->rbuf;
2357 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage))
2359 switch (c_req->command)
2361 case SOCKS5_CMD_TCP_STREAM:
2365 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2366 _("Unsupported socks command %d\n"),
2367 (int) c_req->command);
2368 signal_socks_failure (s5r,
2369 SOCKS5_STATUS_COMMAND_NOT_SUPPORTED);
2372 switch (c_req->addr_type)
2374 case SOCKS5_AT_IPV4:
2376 const struct in_addr *v4 = (const struct in_addr *) &c_req[1];
2377 const uint16_t *port = (const uint16_t *) &v4[1];
2378 struct sockaddr_in *in;
2380 s5r->port = ntohs (*port);
2381 alen = sizeof (struct in_addr);
2382 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2383 alen + sizeof (uint16_t))
2384 return; /* need more data */
2385 in = (struct sockaddr_in *) &s5r->destination_address;
2386 in->sin_family = AF_INET;
2388 in->sin_port = *port;
2389 #if HAVE_SOCKADDR_IN_SIN_LEN
2390 in->sin_len = sizeof (*in);
2392 s5r->state = SOCKS5_DATA_TRANSFER;
2395 case SOCKS5_AT_IPV6:
2397 const struct in6_addr *v6 = (const struct in6_addr *) &c_req[1];
2398 const uint16_t *port = (const uint16_t *) &v6[1];
2399 struct sockaddr_in6 *in;
2401 s5r->port = ntohs (*port);
2402 alen = sizeof (struct in6_addr);
2403 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2404 alen + sizeof (uint16_t))
2405 return; /* need more data */
2406 in = (struct sockaddr_in6 *) &s5r->destination_address;
2407 in->sin6_family = AF_INET6;
2408 in->sin6_addr = *v6;
2409 in->sin6_port = *port;
2410 #if HAVE_SOCKADDR_IN_SIN_LEN
2411 in->sin6_len = sizeof (*in);
2413 s5r->state = SOCKS5_DATA_TRANSFER;
2416 case SOCKS5_AT_DOMAINNAME:
2418 const uint8_t *dom_len;
2419 const char *dom_name;
2420 const uint16_t *port;
2422 dom_len = (const uint8_t *) &c_req[1];
2423 alen = *dom_len + 1;
2424 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2425 alen + sizeof (uint16_t))
2426 return; /* need more data */
2427 dom_name = (const char *) &dom_len[1];
2428 port = (const uint16_t*) &dom_name[*dom_len];
2429 s5r->domain = GNUNET_strndup (dom_name, *dom_len);
2430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2431 "Requested connection is to %s:%d\n",
2434 s5r->state = SOCKS5_RESOLVING;
2435 s5r->port = ntohs (*port);
2436 s5r->gns_lookup = GNUNET_GNS_lookup (gns_handle,
2439 GNUNET_DNSPARSER_TYPE_A,
2440 GNUNET_NO /* only cached */,
2441 (GNUNET_YES == do_shorten) ? &local_shorten_zone : NULL,
2447 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2448 _("Unsupported socks address type %d\n"),
2449 (int) c_req->addr_type);
2450 signal_socks_failure (s5r,
2451 SOCKS5_STATUS_ADDRESS_TYPE_NOT_SUPPORTED);
2454 clear_from_s5r_rbuf (s5r,
2455 sizeof (struct Socks5ClientRequestMessage) +
2456 alen + sizeof (uint16_t));
2457 if (0 != s5r->rbuf_len)
2459 /* read more bytes than healthy, why did the client send more!? */
2460 GNUNET_break_op (0);
2461 signal_socks_failure (s5r,
2462 SOCKS5_STATUS_GENERAL_FAILURE);
2465 if (SOCKS5_DATA_TRANSFER == s5r->state)
2467 /* if we are not waiting for GNS resolution, signal success */
2468 signal_socks_success (s5r);
2470 /* We are done reading right now */
2471 GNUNET_SCHEDULER_cancel (s5r->rtask);
2472 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2474 case SOCKS5_RESOLVING:
2477 case SOCKS5_DATA_TRANSFER:
2488 * Accept new incoming connections
2490 * @param cls the closure
2491 * @param tc the scheduler context
2494 do_accept (void *cls,
2495 const struct GNUNET_SCHEDULER_TaskContext *tc)
2497 struct GNUNET_NETWORK_Handle *s;
2498 struct Socks5Request *s5r;
2500 ltask = GNUNET_SCHEDULER_NO_TASK;
2501 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2503 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2506 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
2509 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "accept");
2512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2513 "Got an inbound connection, waiting for data\n");
2514 s5r = GNUNET_new (struct Socks5Request);
2515 GNUNET_CONTAINER_DLL_insert (s5r_head,
2519 s5r->state = SOCKS5_INIT;
2520 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2526 /* ******************* General / main code ********************* */
2530 * Task run on shutdown
2532 * @param cls closure
2533 * @param tc task context
2536 do_shutdown (void *cls,
2537 const struct GNUNET_SCHEDULER_TaskContext *tc)
2539 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2540 "Shutting down...\n");
2541 while (NULL != mhd_httpd_head)
2542 kill_httpd (mhd_httpd_head);
2543 while (NULL != s5r_head)
2544 cleanup_s5r (s5r_head);
2547 GNUNET_NETWORK_socket_close (lsock);
2552 GNUNET_IDENTITY_cancel (id_op);
2555 if (NULL != identity)
2557 GNUNET_IDENTITY_disconnect (identity);
2560 if (NULL != curl_multi)
2562 curl_multi_cleanup (curl_multi);
2565 if (NULL != gns_handle)
2567 GNUNET_GNS_disconnect (gns_handle);
2570 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
2572 GNUNET_SCHEDULER_cancel (curl_download_task);
2573 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
2575 if (GNUNET_SCHEDULER_NO_TASK != ltask)
2577 GNUNET_SCHEDULER_cancel (ltask);
2578 ltask = GNUNET_SCHEDULER_NO_TASK;
2580 gnutls_x509_crt_deinit (proxy_ca.cert);
2581 gnutls_x509_privkey_deinit (proxy_ca.key);
2582 gnutls_global_deinit ();
2587 * Continue initialization after we have our zone information.
2592 struct MhdHttpList *hd;
2593 struct sockaddr_in sa;
2595 /* Open listen socket for socks proxy */
2596 /* FIXME: support IPv6! */
2597 memset (&sa, 0, sizeof (sa));
2598 sa.sin_family = AF_INET;
2599 sa.sin_port = htons (port);
2600 #if HAVE_SOCKADDR_IN_SIN_LEN
2601 sa.sin_len = sizeof (sa);
2603 lsock = GNUNET_NETWORK_socket_create (AF_INET,
2608 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
2609 GNUNET_SCHEDULER_shutdown ();
2613 GNUNET_NETWORK_socket_bind (lsock, (const struct sockaddr *) &sa,
2616 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
2617 GNUNET_SCHEDULER_shutdown ();
2620 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
2622 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "listen");
2625 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2626 lsock, &do_accept, NULL);
2628 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
2630 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2631 "cURL global init failed!\n");
2632 GNUNET_SCHEDULER_shutdown ();
2635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2636 "Proxy listens on port %u\n",
2639 /* start MHD daemon for HTTP */
2640 hd = GNUNET_new (struct MhdHttpList);
2641 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_NO_LISTEN_SOCKET,
2644 &create_response, hd,
2645 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
2646 MHD_OPTION_NOTIFY_COMPLETED, &mhd_completed_cb, NULL,
2647 MHD_OPTION_URI_LOG_CALLBACK, &mhd_log_callback, NULL,
2649 if (NULL == hd->daemon)
2652 GNUNET_SCHEDULER_shutdown ();
2656 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
2661 * Method called to inform about the egos of the shorten zone of this peer.
2663 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
2664 * this function is only called ONCE, and 'NULL' being passed in
2665 * @a ego does indicate an error (i.e. name is taken or no default
2666 * value is known). If @a ego is non-NULL and if '*ctx'
2667 * is set in those callbacks, the value WILL be passed to a subsequent
2668 * call to the identity callback of #GNUNET_IDENTITY_connect (if
2669 * that one was not NULL).
2671 * @param cls closure, NULL
2672 * @param ego ego handle
2673 * @param ctx context for application to store data for this ego
2674 * (during the lifetime of this process, initially NULL)
2675 * @param name name assigned by the user for this ego,
2676 * NULL if the user just deleted the ego and it
2677 * must thus no longer be used
2680 identity_shorten_cb (void *cls,
2681 struct GNUNET_IDENTITY_Ego *ego,
2688 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2689 _("No ego configured for `shorten-zone`\n"));
2693 local_shorten_zone = *GNUNET_IDENTITY_ego_get_private_key (ego);
2694 do_shorten = GNUNET_YES;
2701 * Method called to inform about the egos of the master zone of this peer.
2703 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
2704 * this function is only called ONCE, and 'NULL' being passed in
2705 * @a ego does indicate an error (i.e. name is taken or no default
2706 * value is known). If @a ego is non-NULL and if '*ctx'
2707 * is set in those callbacks, the value WILL be passed to a subsequent
2708 * call to the identity callback of #GNUNET_IDENTITY_connect (if
2709 * that one was not NULL).
2711 * @param cls closure, NULL
2712 * @param ego ego handle
2713 * @param ctx context for application to store data for this ego
2714 * (during the lifetime of this process, initially NULL)
2715 * @param name name assigned by the user for this ego,
2716 * NULL if the user just deleted the ego and it
2717 * must thus no longer be used
2720 identity_master_cb (void *cls,
2721 struct GNUNET_IDENTITY_Ego *ego,
2728 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2729 _("No ego configured for `%s`\n"),
2731 GNUNET_SCHEDULER_shutdown ();
2734 GNUNET_IDENTITY_ego_get_public_key (ego,
2736 id_op = GNUNET_IDENTITY_get (identity,
2738 &identity_shorten_cb,
2744 * Main function that will be run
2746 * @param cls closure
2747 * @param args remaining command-line arguments
2748 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
2749 * @param c configuration
2752 run (void *cls, char *const *args, const char *cfgfile,
2753 const struct GNUNET_CONFIGURATION_Handle *c)
2755 char* cafile_cfg = NULL;
2759 if (NULL == (curl_multi = curl_multi_init ()))
2761 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2762 "Failed to create cURL multi handle!\n");
2765 cafile = cafile_opt;
2768 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
2772 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2777 cafile = cafile_cfg;
2779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2780 "Using %s as CA\n", cafile);
2782 gnutls_global_init ();
2783 gnutls_x509_crt_init (&proxy_ca.cert);
2784 gnutls_x509_privkey_init (&proxy_ca.key);
2786 if ( (GNUNET_OK != load_cert_from_file (proxy_ca.cert, cafile)) ||
2787 (GNUNET_OK != load_key_from_file (proxy_ca.key, cafile)) )
2789 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2790 _("Failed to load SSL/TLS key and certificate from `%s'\n"),
2792 gnutls_x509_crt_deinit (proxy_ca.cert);
2793 gnutls_x509_privkey_deinit (proxy_ca.key);
2794 gnutls_global_deinit ();
2795 GNUNET_free_non_null (cafile_cfg);
2798 GNUNET_free_non_null (cafile_cfg);
2799 if (NULL == (gns_handle = GNUNET_GNS_connect (cfg)))
2801 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2802 "Unable to connect to GNS!\n");
2803 gnutls_x509_crt_deinit (proxy_ca.cert);
2804 gnutls_x509_privkey_deinit (proxy_ca.key);
2805 gnutls_global_deinit ();
2808 identity = GNUNET_IDENTITY_connect (cfg,
2810 id_op = GNUNET_IDENTITY_get (identity,
2812 &identity_master_cb,
2814 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2815 &do_shutdown, NULL);
2820 * The main function for gnunet-gns-proxy.
2822 * @param argc number of arguments from the command line
2823 * @param argv command line arguments
2824 * @return 0 ok, 1 on error
2827 main (int argc, char *const *argv)
2829 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
2831 gettext_noop ("listen on specified port (default: 7777)"), 1,
2832 &GNUNET_GETOPT_set_ulong, &port},
2833 {'a', "authority", NULL,
2834 gettext_noop ("pem file to use as CA"), 1,
2835 &GNUNET_GETOPT_set_string, &cafile_opt},
2836 GNUNET_GETOPT_OPTION_END
2838 static const char* page =
2839 "<html><head><title>gnunet-gns-proxy</title>"
2840 "</head><body>cURL fail</body></html>";
2843 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
2845 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
2846 curl_failure_response = MHD_create_response_from_buffer (strlen (page),
2848 MHD_RESPMEM_PERSISTENT);
2852 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
2853 _("GNUnet GNS proxy"),
2855 &run, NULL)) ? 0 : 1;
2856 MHD_destroy_response (curl_failure_response);
2857 GNUNET_free_non_null ((char *) argv);
2858 GNUNET_CRYPTO_ecc_key_clear (&local_shorten_zone);
2862 /* end of gnunet-gns-proxy.c */