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)
796 gnutls_session_t session;
797 struct curl_slist * to_slist;
799 unsigned int cert_list_size;
800 const gnutls_datum_t *chainp;
802 gptr.to_slist = NULL;
804 curl_easy_getinfo (s5r->curl,
805 CURLINFO_GNUTLS_SESSION,
807 return GNUNET_SYSERR;
809 chainp = gnutls_certificate_get_peers(gptr.session, &cert_list_size);
811 return GNUNET_SYSERR;
813 for(i=0;i<cert_list_size;i++) {
814 gnutls_x509_crt_t cert;
817 if(GNUTLS_E_SUCCESS == gnutls_x509_crt_init (&cert)) {
818 if((GNUTLS_E_SUCCESS ==
819 gnutls_x509_crt_import (cert, &chainp[i],
820 GNUTLS_X509_FMT_DER)) &&
822 gnutls_x509_crt_print (cert,
823 GNUTLS_CRT_PRINT_FULL,
825 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
826 "Certificate #%d: %.*s", i, dn.size, dn.data);
827 gnutls_free (dn.data);
828 gnutls_x509_crt_deinit (cert);
837 * We're getting an HTTP response header from cURL. Convert it to the
838 * MHD response headers. Mostly copies the headers, but makes special
839 * adjustments to "Set-Cookie" and "Location" headers as those may need
840 * to be changed from the LEHO to the domain the browser expects.
842 * @param buffer curl buffer with a single line of header data; not 0-terminated!
843 * @param size curl blocksize
844 * @param nmemb curl blocknumber
845 * @param cls our `struct Socks5Request *`
846 * @return size of processed bytes
849 curl_check_hdr (void *buffer, size_t size, size_t nmemb, void *cls)
851 struct Socks5Request *s5r = cls;
852 size_t bytes = size * nmemb;
854 const char *hdr_type;
855 const char *cookie_domain;
858 char *new_cookie_hdr;
861 size_t delta_cdomain;
865 if (NULL == s5r->response)
867 /* first, check SSL certificate */
868 if ( (HTTPS_PORT == s5r->port) &&
869 (GNUNET_OK != check_ssl_certificate (s5r)) )
872 GNUNET_break (CURLE_OK ==
873 curl_easy_getinfo (s5r->curl,
874 CURLINFO_RESPONSE_CODE,
876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
877 "Creating MHD response with code %d\n",
879 s5r->response_code = resp_code;
880 s5r->response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
885 if (NULL != s5r->leho)
889 GNUNET_asprintf (&cors_hdr,
890 (HTTPS_PORT == s5r->port)
895 GNUNET_break (MHD_YES ==
896 MHD_add_response_header (s5r->response,
897 MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN,
899 GNUNET_free (cors_hdr);
901 /* force connection to be closed after each request, as we
902 do not support HTTP pipelining */
903 GNUNET_break (MHD_YES ==
904 MHD_add_response_header (s5r->response,
905 MHD_HTTP_HEADER_CONNECTION,
909 ndup = GNUNET_strndup (buffer, bytes);
910 hdr_type = strtok (ndup, ":");
911 if (NULL == hdr_type)
916 hdr_val = strtok (NULL, "");
925 /* custom logic for certain header types */
926 new_cookie_hdr = NULL;
927 if ( (NULL != s5r->leho) &&
928 (0 == strcasecmp (hdr_type,
929 MHD_HTTP_HEADER_SET_COOKIE)) )
932 new_cookie_hdr = GNUNET_malloc (strlen (hdr_val) +
933 strlen (s5r->domain) + 1);
935 domain_matched = GNUNET_NO; /* make sure we match domain at most once */
936 for (tok = strtok (hdr_val, ";"); NULL != tok; tok = strtok (NULL, ";"))
938 if ( (0 == strncasecmp (tok, " domain", strlen (" domain"))) &&
939 (GNUNET_NO == domain_matched) )
941 domain_matched = GNUNET_YES;
942 cookie_domain = tok + strlen (" domain") + 1;
943 if (strlen (cookie_domain) < strlen (s5r->leho))
945 delta_cdomain = strlen (s5r->leho) - strlen (cookie_domain);
946 if (0 == strcasecmp (cookie_domain, s5r->leho + delta_cdomain))
948 offset += sprintf (new_cookie_hdr + offset,
954 else if (0 == strcmp (cookie_domain, s5r->leho))
956 offset += sprintf (new_cookie_hdr + offset,
961 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
962 _("Cookie domain `%s' supplied by server is invalid\n"),
965 memcpy (new_cookie_hdr + offset, tok, strlen (tok));
966 offset += strlen (tok);
967 new_cookie_hdr[offset++] = ';';
969 hdr_val = new_cookie_hdr;
973 if (0 == strcasecmp (MHD_HTTP_HEADER_LOCATION, hdr_type))
977 GNUNET_asprintf (&leho_host,
978 (HTTPS_PORT != s5r->port)
982 if (0 == strncmp (leho_host,
986 GNUNET_asprintf (&new_location,
988 (HTTPS_PORT != s5r->port)
992 hdr_val + strlen (leho_host));
993 hdr_val = new_location;
995 GNUNET_free (leho_host);
997 /* MHD does not allow certain characters in values, remove those */
998 if (NULL != (tok = strchr (hdr_val, '\n')))
1000 if (NULL != (tok = strchr (hdr_val, '\r')))
1002 if (NULL != (tok = strchr (hdr_val, '\t')))
1004 if (0 != strlen (hdr_val))
1006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1007 "Adding header %s: %s to MHD response\n",
1010 GNUNET_break (MHD_YES ==
1011 MHD_add_response_header (s5r->response,
1016 GNUNET_free_non_null (new_cookie_hdr);
1017 GNUNET_free_non_null (new_location);
1023 * Handle response payload data from cURL. Copies it into our `io_buf` to make
1024 * it available to MHD.
1026 * @param ptr pointer to the data
1027 * @param size number of blocks of data
1028 * @param nmemb blocksize
1029 * @param ctx our `struct Socks5Request *`
1030 * @return number of bytes handled
1033 curl_download_cb (void *ptr, size_t size, size_t nmemb, void* ctx)
1035 struct Socks5Request *s5r = ctx;
1036 size_t total = size * nmemb;
1038 if ( (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state) ||
1039 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
1041 /* we're still not done with the upload, do not yet
1042 start the download, the IO buffer is still full
1043 with upload data. */
1044 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1045 "Pausing CURL download, waiting for UPLOAD to finish\n");
1046 return CURL_WRITEFUNC_PAUSE; /* not yet ready for data download */
1048 if (sizeof (s5r->io_buf) - s5r->io_len < total)
1050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1051 "Pausing CURL download, not enough space\n");
1052 return CURL_WRITEFUNC_PAUSE; /* not enough space */
1054 memcpy (&s5r->io_buf[s5r->io_len],
1057 s5r->io_len += total;
1058 if (s5r->io_len == total)
1059 run_mhd_now (s5r->hd);
1065 * cURL callback for uploaded (PUT/POST) data. Copies it into our `io_buf`
1066 * to make it available to MHD.
1068 * @param buf where to write the data
1069 * @param size number of bytes per member
1070 * @param nmemb number of members available in @a buf
1071 * @param cls our `struct Socks5Request` that generated the data
1072 * @return number of bytes copied to @a buf
1075 curl_upload_cb (void *buf, size_t size, size_t nmemb, void *cls)
1077 struct Socks5Request *s5r = cls;
1078 size_t len = size * nmemb;
1081 if ( (0 == s5r->io_len) &&
1082 (SOCKS5_SOCKET_UPLOAD_DONE != s5r->state) )
1084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1085 "Pausing CURL UPLOAD, need more data\n");
1086 return CURL_READFUNC_PAUSE;
1088 if ( (0 == s5r->io_len) &&
1089 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
1091 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1093 "Completed CURL UPLOAD\n");
1094 return 0; /* upload finished, can now download */
1096 if ( (SOCKS5_SOCKET_UPLOAD_STARTED != s5r->state) ||
1097 (SOCKS5_SOCKET_UPLOAD_DONE != s5r->state) )
1100 return CURL_READFUNC_ABORT;
1102 to_copy = GNUNET_MIN (s5r->io_len,
1104 memcpy (buf, s5r->io_buf, to_copy);
1105 memmove (s5r->io_buf,
1106 &s5r->io_buf[to_copy],
1107 s5r->io_len - to_copy);
1108 s5r->io_len -= to_copy;
1109 if (s5r->io_len + to_copy == sizeof (s5r->io_buf))
1110 run_mhd_now (s5r->hd); /* got more space for upload now */
1115 /* ************************** main loop of cURL interaction ****************** */
1119 * Task that is run when we are ready to receive more data
1122 * @param cls closure
1123 * @param tc task context
1126 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1130 * Ask cURL for the select() sets and schedule cURL operations.
1133 curl_download_prepare ()
1140 struct GNUNET_NETWORK_FDSet *grs;
1141 struct GNUNET_NETWORK_FDSet *gws;
1143 struct GNUNET_TIME_Relative rtime;
1145 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
1147 GNUNET_SCHEDULER_cancel (curl_download_task);
1148 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1154 if (CURLM_OK != (mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max)))
1156 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1157 "%s failed at %s:%d: `%s'\n",
1158 "curl_multi_fdset", __FILE__, __LINE__,
1159 curl_multi_strerror (mret));
1163 GNUNET_break (CURLM_OK == curl_multi_timeout (curl_multi, &to));
1165 rtime = GNUNET_TIME_UNIT_FOREVER_REL;
1167 rtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1170 grs = GNUNET_NETWORK_fdset_create ();
1171 gws = GNUNET_NETWORK_fdset_create ();
1172 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1173 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1174 curl_download_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1177 &curl_task_download, curl_multi);
1178 GNUNET_NETWORK_fdset_destroy (gws);
1179 GNUNET_NETWORK_fdset_destroy (grs);
1183 curl_download_task = GNUNET_SCHEDULER_add_delayed (rtime,
1184 &curl_task_download,
1191 * Task that is run when we are ready to receive more data from curl.
1193 * @param cls closure, NULL
1194 * @param tc task context
1197 curl_task_download (void *cls,
1198 const struct GNUNET_SCHEDULER_TaskContext *tc)
1202 struct CURLMsg *msg;
1204 struct Socks5Request *s5r;
1206 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1210 mret = curl_multi_perform (curl_multi, &running);
1211 while (NULL != (msg = curl_multi_info_read (curl_multi, &msgnum)))
1213 GNUNET_break (CURLE_OK ==
1214 curl_easy_getinfo (msg->easy_handle,
1225 /* documentation says this is not used */
1229 switch (msg->data.result)
1232 case CURLE_GOT_NOTHING:
1233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1234 "CURL download completed.\n");
1235 s5r->state = SOCKS5_SOCKET_DOWNLOAD_DONE;
1236 run_mhd_now (s5r->hd);
1239 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1240 "Download curl failed: %s\n",
1241 curl_easy_strerror (msg->data.result));
1242 /* FIXME: indicate error somehow? close MHD connection badly as well? */
1243 s5r->state = SOCKS5_SOCKET_DOWNLOAD_DONE;
1244 run_mhd_now (s5r->hd);
1247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1248 "Cleaning up cURL handle\n");
1249 curl_multi_remove_handle (curl_multi, s5r->curl);
1250 curl_easy_cleanup (s5r->curl);
1252 if (NULL == s5r->response)
1253 s5r->response = curl_failure_response;
1256 /* documentation says this is not used */
1260 /* unexpected status code */
1265 } while (mret == CURLM_CALL_MULTI_PERFORM);
1266 if (CURLM_OK != mret)
1267 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1268 "%s failed at %s:%d: `%s'\n",
1269 "curl_multi_perform", __FILE__, __LINE__,
1270 curl_multi_strerror (mret));
1273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1274 "Suspending cURL multi loop, no more events pending\n");
1275 return; /* nothing more in progress */
1277 curl_download_prepare();
1281 /* ********************************* MHD response generation ******************* */
1285 * Read HTTP request header field from the request. Copies the fields
1286 * over to the 'headers' that will be given to curl. However, 'Host'
1287 * is substituted with the LEHO if present. We also change the
1288 * 'Connection' header value to "close" as the proxy does not support
1291 * @param cls our `struct Socks5Request`
1292 * @param kind value kind
1293 * @param key field key
1294 * @param value field value
1295 * @return MHD_YES to continue to iterate
1298 con_val_iter (void *cls,
1299 enum MHD_ValueKind kind,
1303 struct Socks5Request *s5r = cls;
1306 if ( (0 == strcasecmp (MHD_HTTP_HEADER_HOST, key)) &&
1307 (NULL != s5r->leho) )
1309 if (0 == strcasecmp (MHD_HTTP_HEADER_CONNECTION, key))
1311 GNUNET_asprintf (&hdr,
1315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1316 "Adding HEADER `%s' to HTTP request\n",
1318 s5r->headers = curl_slist_append (s5r->headers,
1326 * Main MHD callback for handling requests.
1329 * @param con MHD connection handle
1330 * @param url the url in the request
1331 * @param meth the HTTP method used ("GET", "PUT", etc.)
1332 * @param ver the HTTP version string (i.e. "HTTP/1.1")
1333 * @param upload_data the data being uploaded (excluding HEADERS,
1334 * for a POST that fits into memory and that is encoded
1335 * with a supported encoding, the POST data will NOT be
1336 * given in upload_data and is instead available as
1337 * part of MHD_get_connection_values; very large POST
1338 * data *will* be made available incrementally in
1340 * @param upload_data_size set initially to the size of the
1341 * @a upload_data provided; the method must update this
1342 * value to the number of bytes NOT processed;
1343 * @param con_cls pointer to location where we store the 'struct Request'
1344 * @return MHD_YES if the connection was handled successfully,
1345 * MHD_NO if the socket must be closed due to a serious
1346 * error while handling the request
1349 create_response (void *cls,
1350 struct MHD_Connection *con,
1354 const char *upload_data,
1355 size_t *upload_data_size,
1358 /* struct MhdHttpList* hd = cls; */
1359 struct Socks5Request *s5r = *con_cls;
1361 char ipstring[INET6_ADDRSTRLEN];
1362 char ipaddr[INET6_ADDRSTRLEN + 2];
1363 const struct sockaddr *sa;
1364 const struct sockaddr_in *s4;
1365 const struct sockaddr_in6 *s6;
1374 if ( (NULL == s5r->curl) &&
1375 (SOCKS5_SOCKET_WITH_MHD == s5r->state) )
1377 /* first time here, initialize curl handle */
1378 sa = (const struct sockaddr *) &s5r->destination_address;
1379 switch (sa->sa_family)
1382 s4 = (const struct sockaddr_in *) &s5r->destination_address;
1383 if (NULL == inet_ntop (AF_INET,
1391 GNUNET_snprintf (ipaddr,
1395 port = ntohs (s4->sin_port);
1398 s6 = (const struct sockaddr_in6 *) &s5r->destination_address;
1399 if (NULL == inet_ntop (AF_INET6,
1407 GNUNET_snprintf (ipaddr,
1411 port = ntohs (s6->sin6_port);
1417 s5r->curl = curl_easy_init ();
1418 if (NULL == s5r->curl)
1419 return MHD_queue_response (con,
1420 MHD_HTTP_INTERNAL_SERVER_ERROR,
1421 curl_failure_response);
1422 curl_easy_setopt (s5r->curl, CURLOPT_HEADERFUNCTION, &curl_check_hdr);
1423 curl_easy_setopt (s5r->curl, CURLOPT_HEADERDATA, s5r);
1424 curl_easy_setopt (s5r->curl, CURLOPT_FOLLOWLOCATION, 0);
1425 curl_easy_setopt (s5r->curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
1426 curl_easy_setopt (s5r->curl, CURLOPT_CONNECTTIMEOUT, 600L);
1427 curl_easy_setopt (s5r->curl, CURLOPT_TIMEOUT, 600L);
1428 curl_easy_setopt (s5r->curl, CURLOPT_NOSIGNAL, 1L);
1429 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_CONTENT_DECODING, 0);
1430 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_TRANSFER_DECODING, 0);
1431 curl_easy_setopt (s5r->curl, CURLOPT_NOSIGNAL, 1L);
1432 curl_easy_setopt (s5r->curl, CURLOPT_PRIVATE, s5r);
1433 curl_easy_setopt (s5r->curl, CURLOPT_VERBOSE, 0); // FIXME: remove later
1434 GNUNET_asprintf (&curlurl,
1435 (HTTPS_PORT != s5r->port)
1437 : "https://%s:%d%s",
1441 curl_easy_setopt (s5r->curl,
1444 GNUNET_free (curlurl);
1446 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_PUT))
1448 s5r->state = SOCKS5_SOCKET_UPLOAD_STARTED;
1449 curl_easy_setopt (s5r->curl, CURLOPT_UPLOAD, 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_POST))
1457 s5r->state = SOCKS5_SOCKET_UPLOAD_STARTED;
1458 curl_easy_setopt (s5r->curl, CURLOPT_POST, 1);
1459 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1460 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1461 curl_easy_setopt (s5r->curl, CURLOPT_READFUNCTION, &curl_upload_cb);
1462 curl_easy_setopt (s5r->curl, CURLOPT_READDATA, s5r);
1464 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_HEAD))
1466 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1467 curl_easy_setopt (s5r->curl, CURLOPT_NOBODY, 1);
1469 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_GET))
1471 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1472 curl_easy_setopt (s5r->curl, CURLOPT_HTTPGET, 1);
1473 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1474 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1478 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1479 _("Unsupported HTTP method `%s'\n"),
1481 curl_easy_cleanup (s5r->curl);
1486 if (0 == strcasecmp (ver, MHD_HTTP_VERSION_1_0))
1488 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
1490 else if (0 == strcasecmp (ver, MHD_HTTP_VERSION_1_1))
1492 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
1496 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_NONE);
1499 if (HTTPS_PORT == s5r->port)
1501 curl_easy_setopt (s5r->curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
1502 curl_easy_setopt (s5r->curl, CURLOPT_SSL_VERIFYPEER, 1L);
1503 /* Disable cURL checking the hostname, as we will check ourselves
1504 as only we have the domain name or the LEHO or the DANE record */
1505 curl_easy_setopt (s5r->curl, CURLOPT_SSL_VERIFYHOST, 0L);
1509 curl_easy_setopt (s5r->curl, CURLOPT_USE_SSL, CURLUSESSL_NONE);
1512 if (CURLM_OK != curl_multi_add_handle (curl_multi, s5r->curl))
1515 curl_easy_cleanup (s5r->curl);
1519 MHD_get_connection_values (con,
1521 &con_val_iter, s5r);
1522 curl_easy_setopt (s5r->curl, CURLOPT_HTTPHEADER, s5r->headers);
1523 curl_download_prepare ();
1527 /* continuing to process request */
1528 if (0 != *upload_data_size)
1530 left = GNUNET_MIN (*upload_data_size,
1531 sizeof (s5r->io_buf) - s5r->io_len);
1532 memcpy (&s5r->io_buf[s5r->io_len],
1535 s5r->io_len += left;
1536 *upload_data_size -= left;
1537 GNUNET_assert (NULL != s5r->curl);
1538 curl_easy_pause (s5r->curl, CURLPAUSE_CONT);
1539 curl_download_prepare ();
1542 if (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state)
1544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1545 "Finished processing UPLOAD\n");
1546 s5r->state = SOCKS5_SOCKET_UPLOAD_DONE;
1548 if (NULL == s5r->response)
1549 return MHD_YES; /* too early to queue response, did not yet get headers from cURL */
1550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1551 "Queueing response with MHD\n");
1552 return MHD_queue_response (con,
1558 /* ******************** MHD HTTP setup and event loop ******************** */
1562 * Function called when MHD decides that we are done with a connection.
1565 * @param connection connection handle
1566 * @param con_cls value as set by the last call to
1567 * the MHD_AccessHandlerCallback, should be our `struct Socks5Request`
1568 * @param toe reason for request termination (ignored)
1571 mhd_completed_cb (void *cls,
1572 struct MHD_Connection *connection,
1574 enum MHD_RequestTerminationCode toe)
1576 struct Socks5Request *s5r = *con_cls;
1580 if (MHD_REQUEST_TERMINATED_COMPLETED_OK != toe)
1581 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1582 "MHD encountered error handling request: %d\n",
1590 * Function called when MHD first processes an incoming connection.
1591 * Gives us the respective URI information.
1593 * We use this to associate the `struct MHD_Connection` with our
1594 * internal `struct Socks5Request` data structure (by checking
1595 * for matching sockets).
1597 * @param cls the HTTP server handle (a `struct MhdHttpList`)
1598 * @param url the URL that is being requested
1599 * @param connection MHD connection object for the request
1600 * @return the `struct Socks5Request` that this @a connection is for
1603 mhd_log_callback (void *cls,
1605 struct MHD_Connection *connection)
1607 struct Socks5Request *s5r;
1608 const union MHD_ConnectionInfo *ci;
1611 ci = MHD_get_connection_info (connection,
1612 MHD_CONNECTION_INFO_CONNECTION_FD);
1618 sock = ci->connect_fd;
1619 for (s5r = s5r_head; NULL != s5r; s5r = s5r->next)
1621 if (GNUNET_NETWORK_get_fd (s5r->sock) == sock)
1623 if (NULL != s5r->url)
1628 s5r->url = GNUNET_strdup (url);
1629 GNUNET_SCHEDULER_cancel (s5r->timeout_task);
1630 s5r->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1639 * Kill the given MHD daemon.
1641 * @param hd daemon to stop
1644 kill_httpd (struct MhdHttpList *hd)
1646 GNUNET_CONTAINER_DLL_remove (mhd_httpd_head,
1649 GNUNET_free_non_null (hd->domain);
1650 MHD_stop_daemon (hd->daemon);
1651 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1653 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1654 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1656 GNUNET_free_non_null (hd->proxy_cert);
1664 * Task run whenever HTTP server is idle for too long. Kill it.
1666 * @param cls the `struct MhdHttpList *`
1667 * @param tc sched context
1670 kill_httpd_task (void *cls,
1671 const struct GNUNET_SCHEDULER_TaskContext *tc)
1673 struct MhdHttpList *hd = cls;
1675 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1681 * Task run whenever HTTP server operations are pending.
1683 * @param cls the `struct MhdHttpList *` of the daemon that is being run
1684 * @param tc sched context
1687 do_httpd (void *cls,
1688 const struct GNUNET_SCHEDULER_TaskContext *tc);
1692 * Schedule MHD. This function should be called initially when an
1693 * MHD is first getting its client socket, and will then automatically
1694 * always be called later whenever there is work to be done.
1696 * @param hd the daemon to schedule
1699 schedule_httpd (struct MhdHttpList *hd)
1704 struct GNUNET_NETWORK_FDSet *wrs;
1705 struct GNUNET_NETWORK_FDSet *wws;
1708 MHD_UNSIGNED_LONG_LONG timeout;
1709 struct GNUNET_TIME_Relative tv;
1715 if (MHD_YES != MHD_get_fdset (hd->daemon, &rs, &ws, &es, &max))
1720 haveto = MHD_get_timeout (hd->daemon, &timeout);
1721 if (MHD_YES == haveto)
1722 tv.rel_value_us = (uint64_t) timeout * 1000LL;
1724 tv = GNUNET_TIME_UNIT_FOREVER_REL;
1727 wrs = GNUNET_NETWORK_fdset_create ();
1728 wws = GNUNET_NETWORK_fdset_create ();
1729 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
1730 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
1737 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1738 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1739 if ( (MHD_YES != haveto) &&
1743 /* daemon is idle, kill after timeout */
1744 hd->httpd_task = GNUNET_SCHEDULER_add_delayed (MHD_CACHE_TIMEOUT,
1751 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1756 GNUNET_NETWORK_fdset_destroy (wrs);
1758 GNUNET_NETWORK_fdset_destroy (wws);
1763 * Task run whenever HTTP server operations are pending.
1765 * @param cls the `struct MhdHttpList` of the daemon that is being run
1766 * @param tc scheduler context
1769 do_httpd (void *cls,
1770 const struct GNUNET_SCHEDULER_TaskContext *tc)
1772 struct MhdHttpList *hd = cls;
1774 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1775 MHD_run (hd->daemon);
1776 schedule_httpd (hd);
1781 * Run MHD now, we have extra data ready for the callback.
1783 * @param hd the daemon to run now.
1786 run_mhd_now (struct MhdHttpList *hd)
1788 if (GNUNET_SCHEDULER_NO_TASK !=
1790 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1791 hd->httpd_task = GNUNET_SCHEDULER_add_now (&do_httpd,
1797 * Read file in filename
1799 * @param filename file to read
1800 * @param size pointer where filesize is stored
1801 * @return NULL on error
1804 load_file (const char* filename,
1811 GNUNET_DISK_file_size (filename, &fsize,
1812 GNUNET_YES, GNUNET_YES))
1814 if (fsize > MAX_PEM_SIZE)
1816 *size = (unsigned int) fsize;
1817 buffer = GNUNET_malloc (*size);
1818 if (fsize != GNUNET_DISK_fn_read (filename, buffer, (size_t) fsize))
1820 GNUNET_free (buffer);
1828 * Load PEM key from file
1830 * @param key where to store the data
1831 * @param keyfile path to the PEM file
1832 * @return #GNUNET_OK on success
1835 load_key_from_file (gnutls_x509_privkey_t key,
1836 const char* keyfile)
1838 gnutls_datum_t key_data;
1841 key_data.data = load_file (keyfile, &key_data.size);
1842 ret = gnutls_x509_privkey_import (key, &key_data,
1843 GNUTLS_X509_FMT_PEM);
1844 if (GNUTLS_E_SUCCESS != ret)
1846 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1847 _("Unable to import private key from file `%s'\n"),
1850 GNUNET_free_non_null (key_data.data);
1851 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
1856 * Load cert from file
1858 * @param crt struct to store data in
1859 * @param certfile path to pem file
1860 * @return #GNUNET_OK on success
1863 load_cert_from_file (gnutls_x509_crt_t crt,
1864 const char* certfile)
1866 gnutls_datum_t cert_data;
1869 cert_data.data = load_file (certfile, &cert_data.size);
1870 ret = gnutls_x509_crt_import (crt, &cert_data,
1871 GNUTLS_X509_FMT_PEM);
1872 if (GNUTLS_E_SUCCESS != ret)
1874 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1875 _("Unable to import certificate %s\n"), certfile);
1877 GNUNET_free_non_null (cert_data.data);
1878 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
1883 * Generate new certificate for specific name
1885 * @param name the subject name to generate a cert for
1886 * @return a struct holding the PEM data, NULL on error
1888 static struct ProxyGNSCertificate *
1889 generate_gns_certificate (const char *name)
1891 unsigned int serial;
1892 size_t key_buf_size;
1893 size_t cert_buf_size;
1894 gnutls_x509_crt_t request;
1897 struct ProxyGNSCertificate *pgc;
1899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1900 "Generating TLS/SSL certificate for `%s'\n",
1902 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_init (&request));
1903 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_set_key (request, proxy_ca.key));
1904 pgc = GNUNET_new (struct ProxyGNSCertificate);
1905 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COUNTRY_NAME,
1907 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_ORGANIZATION_NAME,
1908 0, "GNU Name System", 4);
1909 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COMMON_NAME,
1910 0, name, strlen (name));
1911 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_set_version (request, 3));
1912 gnutls_rnd (GNUTLS_RND_NONCE, &serial, sizeof (serial));
1913 gnutls_x509_crt_set_serial (request,
1916 etime = time (NULL);
1917 tm_data = localtime (&etime);
1918 gnutls_x509_crt_set_activation_time (request,
1921 etime = mktime (tm_data);
1922 gnutls_x509_crt_set_expiration_time (request,
1924 gnutls_x509_crt_sign (request,
1927 key_buf_size = sizeof (pgc->key);
1928 cert_buf_size = sizeof (pgc->cert);
1929 gnutls_x509_crt_export (request, GNUTLS_X509_FMT_PEM,
1930 pgc->cert, &cert_buf_size);
1931 gnutls_x509_privkey_export (proxy_ca.key, GNUTLS_X509_FMT_PEM,
1932 pgc->key, &key_buf_size);
1933 gnutls_x509_crt_deinit (request);
1939 * Lookup (or create) an SSL MHD instance for a particular domain.
1941 * @param domain the domain the SSL daemon has to serve
1942 * @return NULL on errro
1944 static struct MhdHttpList *
1945 lookup_ssl_httpd (const char* domain)
1947 struct MhdHttpList *hd;
1948 struct ProxyGNSCertificate *pgc;
1950 for (hd = mhd_httpd_head; NULL != hd; hd = hd->next)
1951 if ( (NULL != hd->domain) &&
1952 (0 == strcmp (hd->domain, domain)) )
1954 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1955 "Starting fresh MHD HTTPS instance for domain `%s'\n",
1957 pgc = generate_gns_certificate (domain);
1958 hd = GNUNET_new (struct MhdHttpList);
1959 hd->is_ssl = GNUNET_YES;
1960 hd->domain = GNUNET_strdup (domain);
1961 hd->proxy_cert = pgc;
1962 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_SSL | MHD_USE_NO_LISTEN_SOCKET,
1965 &create_response, hd,
1966 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
1967 MHD_OPTION_NOTIFY_COMPLETED, &mhd_completed_cb, NULL,
1968 MHD_OPTION_URI_LOG_CALLBACK, &mhd_log_callback, NULL,
1969 MHD_OPTION_HTTPS_MEM_KEY, pgc->key,
1970 MHD_OPTION_HTTPS_MEM_CERT, pgc->cert,
1972 if (NULL == hd->daemon)
1978 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head,
1986 * Task run when a Socks5Request somehow fails to be associated with
1987 * an MHD connection (i.e. because the client never speaks HTTP after
1988 * the SOCKS5 handshake). Clean up.
1990 * @param cls the `struct Socks5Request *`
1991 * @param tc sched context
1994 timeout_s5r_handshake (void *cls,
1995 const struct GNUNET_SCHEDULER_TaskContext *tc)
1997 struct Socks5Request *s5r = cls;
1999 s5r->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2005 * We're done with the Socks5 protocol, now we need to pass the
2006 * connection data through to the final destination, either
2007 * direct (if the protocol might not be HTTP), or via MHD
2008 * (if the port looks like it should be HTTP).
2010 * @param s5r socks request that has reached the final stage
2013 setup_data_transfer (struct Socks5Request *s5r)
2015 struct MhdHttpList *hd;
2017 const struct sockaddr *addr;
2023 hd = lookup_ssl_httpd (s5r->domain);
2026 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2027 _("Failed to start HTTPS server for `%s'\n"),
2035 GNUNET_assert (NULL != httpd);
2039 fd = GNUNET_NETWORK_get_fd (s5r->sock);
2040 addr = GNUNET_NETWORK_get_addr (s5r->sock);
2041 len = GNUNET_NETWORK_get_addrlen (s5r->sock);
2042 s5r->state = SOCKS5_SOCKET_WITH_MHD;
2043 if (MHD_YES != MHD_add_connection (hd->daemon, fd, addr, len))
2045 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2046 _("Failed to pass client to MHD\n"));
2051 schedule_httpd (hd);
2052 s5r->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_HANDSHAKE_TIMEOUT,
2053 &timeout_s5r_handshake,
2058 /* ********************* SOCKS handling ************************* */
2062 * Write data from buffer to socks5 client, then continue with state machine.
2064 * @param cls the closure with the `struct Socks5Request`
2065 * @param tc scheduler context
2068 do_write (void *cls,
2069 const struct GNUNET_SCHEDULER_TaskContext *tc)
2071 struct Socks5Request *s5r = cls;
2074 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
2075 len = GNUNET_NETWORK_socket_send (s5r->sock,
2080 /* write error: connection closed, shutdown, etc.; just clean up */
2086 s5r->wbuf_len - len);
2087 s5r->wbuf_len -= len;
2088 if (s5r->wbuf_len > 0)
2090 /* not done writing */
2092 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2098 /* we're done writing, continue with state machine! */
2105 case SOCKS5_REQUEST:
2106 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s5r->rtask);
2108 case SOCKS5_DATA_TRANSFER:
2109 setup_data_transfer (s5r);
2111 case SOCKS5_WRITE_THEN_CLEANUP:
2122 * Return a server response message indicating a failure to the client.
2124 * @param s5r request to return failure code for
2125 * @param sc status code to return
2128 signal_socks_failure (struct Socks5Request *s5r,
2129 enum Socks5StatusCode sc)
2131 struct Socks5ServerResponseMessage *s_resp;
2133 s_resp = (struct Socks5ServerResponseMessage *) &s5r->wbuf[s5r->wbuf_len];
2134 memset (s_resp, 0, sizeof (struct Socks5ServerResponseMessage));
2135 s_resp->version = SOCKS_VERSION_5;
2137 s5r->state = SOCKS5_WRITE_THEN_CLEANUP;
2138 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
2140 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2147 * Return a server response message indicating success.
2149 * @param s5r request to return success status message for
2152 signal_socks_success (struct Socks5Request *s5r)
2154 struct Socks5ServerResponseMessage *s_resp;
2156 s_resp = (struct Socks5ServerResponseMessage *) &s5r->wbuf[s5r->wbuf_len];
2157 s_resp->version = SOCKS_VERSION_5;
2158 s_resp->reply = SOCKS5_STATUS_REQUEST_GRANTED;
2159 s_resp->reserved = 0;
2160 s_resp->addr_type = SOCKS5_AT_IPV4;
2161 /* zero out IPv4 address and port */
2164 sizeof (struct in_addr) + sizeof (uint16_t));
2165 s5r->wbuf_len += sizeof (struct Socks5ServerResponseMessage) +
2166 sizeof (struct in_addr) + sizeof (uint16_t);
2167 if (GNUNET_SCHEDULER_NO_TASK == s5r->wtask)
2169 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2176 * Process GNS results for target domain.
2178 * @param cls the `struct Socks5Request`
2179 * @param rd_count number of records returned
2180 * @param rd record data
2183 handle_gns_result (void *cls,
2185 const struct GNUNET_NAMESTORE_RecordData *rd)
2187 struct Socks5Request *s5r = cls;
2189 const struct GNUNET_NAMESTORE_RecordData *r;
2192 s5r->gns_lookup = NULL;
2194 for (i=0;i<rd_count;i++)
2197 switch (r->record_type)
2199 case GNUNET_DNSPARSER_TYPE_A:
2201 struct sockaddr_in *in;
2203 if (sizeof (struct in_addr) != r->data_size)
2205 GNUNET_break_op (0);
2208 if (GNUNET_YES == got_ip)
2211 GNUNET_NETWORK_test_pf (PF_INET))
2213 got_ip = GNUNET_YES;
2214 in = (struct sockaddr_in *) &s5r->destination_address;
2215 in->sin_family = AF_INET;
2216 memcpy (&in->sin_addr,
2219 in->sin_port = htons (s5r->port);
2220 #if HAVE_SOCKADDR_IN_SIN_LEN
2221 in->sin_len = sizeof (*in);
2225 case GNUNET_DNSPARSER_TYPE_AAAA:
2227 struct sockaddr_in6 *in;
2229 if (sizeof (struct in6_addr) != r->data_size)
2231 GNUNET_break_op (0);
2234 if (GNUNET_YES == got_ip)
2237 GNUNET_NETWORK_test_pf (PF_INET))
2239 /* FIXME: allow user to disable IPv6 per configuration option... */
2240 got_ip = GNUNET_YES;
2241 in = (struct sockaddr_in6 *) &s5r->destination_address;
2242 in->sin6_family = AF_INET6;
2243 memcpy (&in->sin6_addr,
2246 in->sin6_port = htons (s5r->port);
2247 #if HAVE_SOCKADDR_IN_SIN_LEN
2248 in->sin6_len = sizeof (*in);
2252 case GNUNET_NAMESTORE_TYPE_VPN:
2253 GNUNET_break (0); /* should have been translated within GNS */
2255 case GNUNET_NAMESTORE_TYPE_LEHO:
2256 GNUNET_free_non_null (s5r->leho);
2257 s5r->leho = GNUNET_strndup (r->data,
2265 if (GNUNET_YES != got_ip)
2267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2268 "Name resolution failed to yield useful IP address.\n");
2269 signal_socks_failure (s5r,
2270 SOCKS5_STATUS_GENERAL_FAILURE);
2273 s5r->state = SOCKS5_DATA_TRANSFER;
2274 signal_socks_success (s5r);
2279 * Remove the first @a len bytes from the beginning of the read buffer.
2281 * @param s5r the handle clear the read buffer for
2282 * @param len number of bytes in read buffer to advance
2285 clear_from_s5r_rbuf (struct Socks5Request *s5r,
2288 GNUNET_assert (len <= s5r->rbuf_len);
2291 s5r->rbuf_len - len);
2292 s5r->rbuf_len -= len;
2297 * Read data from incoming Socks5 connection
2299 * @param cls the closure with the `struct Socks5Request`
2300 * @param tc the scheduler context
2303 do_s5r_read (void *cls,
2304 const struct GNUNET_SCHEDULER_TaskContext *tc)
2306 struct Socks5Request *s5r = cls;
2307 const struct Socks5ClientHelloMessage *c_hello;
2308 struct Socks5ServerHelloMessage *s_hello;
2309 const struct Socks5ClientRequestMessage *c_req;
2313 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2314 if ( (NULL != tc->read_ready) &&
2315 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) )
2317 rlen = GNUNET_NETWORK_socket_recv (s5r->sock,
2318 &s5r->rbuf[s5r->rbuf_len],
2319 sizeof (s5r->rbuf) - s5r->rbuf_len);
2322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2323 "socks5 client disconnected.\n");
2327 s5r->rbuf_len += rlen;
2329 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2333 "Processing %u bytes of socks data in state %d\n",
2339 c_hello = (const struct Socks5ClientHelloMessage*) &s5r->rbuf;
2340 if ( (s5r->rbuf_len < sizeof (struct Socks5ClientHelloMessage)) ||
2341 (s5r->rbuf_len < sizeof (struct Socks5ClientHelloMessage) + c_hello->num_auth_methods) )
2342 return; /* need more data */
2343 if (SOCKS_VERSION_5 != c_hello->version)
2345 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2346 _("Unsupported socks version %d\n"),
2347 (int) c_hello->version);
2351 clear_from_s5r_rbuf (s5r,
2352 sizeof (struct Socks5ClientHelloMessage) + c_hello->num_auth_methods);
2353 GNUNET_assert (0 == s5r->wbuf_len);
2354 s_hello = (struct Socks5ServerHelloMessage *) &s5r->wbuf;
2355 s5r->wbuf_len = sizeof (struct Socks5ServerHelloMessage);
2356 s_hello->version = SOCKS_VERSION_5;
2357 s_hello->auth_method = SOCKS_AUTH_NONE;
2358 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s5r->wtask);
2359 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2362 s5r->state = SOCKS5_REQUEST;
2364 case SOCKS5_REQUEST:
2365 c_req = (const struct Socks5ClientRequestMessage *) &s5r->rbuf;
2366 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage))
2368 switch (c_req->command)
2370 case SOCKS5_CMD_TCP_STREAM:
2374 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2375 _("Unsupported socks command %d\n"),
2376 (int) c_req->command);
2377 signal_socks_failure (s5r,
2378 SOCKS5_STATUS_COMMAND_NOT_SUPPORTED);
2381 switch (c_req->addr_type)
2383 case SOCKS5_AT_IPV4:
2385 const struct in_addr *v4 = (const struct in_addr *) &c_req[1];
2386 const uint16_t *port = (const uint16_t *) &v4[1];
2387 struct sockaddr_in *in;
2389 s5r->port = ntohs (*port);
2390 alen = sizeof (struct in_addr);
2391 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2392 alen + sizeof (uint16_t))
2393 return; /* need more data */
2394 in = (struct sockaddr_in *) &s5r->destination_address;
2395 in->sin_family = AF_INET;
2397 in->sin_port = *port;
2398 #if HAVE_SOCKADDR_IN_SIN_LEN
2399 in->sin_len = sizeof (*in);
2401 s5r->state = SOCKS5_DATA_TRANSFER;
2404 case SOCKS5_AT_IPV6:
2406 const struct in6_addr *v6 = (const struct in6_addr *) &c_req[1];
2407 const uint16_t *port = (const uint16_t *) &v6[1];
2408 struct sockaddr_in6 *in;
2410 s5r->port = ntohs (*port);
2411 alen = sizeof (struct in6_addr);
2412 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2413 alen + sizeof (uint16_t))
2414 return; /* need more data */
2415 in = (struct sockaddr_in6 *) &s5r->destination_address;
2416 in->sin6_family = AF_INET6;
2417 in->sin6_addr = *v6;
2418 in->sin6_port = *port;
2419 #if HAVE_SOCKADDR_IN_SIN_LEN
2420 in->sin6_len = sizeof (*in);
2422 s5r->state = SOCKS5_DATA_TRANSFER;
2425 case SOCKS5_AT_DOMAINNAME:
2427 const uint8_t *dom_len;
2428 const char *dom_name;
2429 const uint16_t *port;
2431 dom_len = (const uint8_t *) &c_req[1];
2432 alen = *dom_len + 1;
2433 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2434 alen + sizeof (uint16_t))
2435 return; /* need more data */
2436 dom_name = (const char *) &dom_len[1];
2437 port = (const uint16_t*) &dom_name[*dom_len];
2438 s5r->domain = GNUNET_strndup (dom_name, *dom_len);
2439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2440 "Requested connection is to %s:%d\n",
2443 s5r->state = SOCKS5_RESOLVING;
2444 s5r->port = ntohs (*port);
2445 s5r->gns_lookup = GNUNET_GNS_lookup (gns_handle,
2448 GNUNET_DNSPARSER_TYPE_A,
2449 GNUNET_NO /* only cached */,
2450 (GNUNET_YES == do_shorten) ? &local_shorten_zone : NULL,
2456 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2457 _("Unsupported socks address type %d\n"),
2458 (int) c_req->addr_type);
2459 signal_socks_failure (s5r,
2460 SOCKS5_STATUS_ADDRESS_TYPE_NOT_SUPPORTED);
2463 clear_from_s5r_rbuf (s5r,
2464 sizeof (struct Socks5ClientRequestMessage) +
2465 alen + sizeof (uint16_t));
2466 if (0 != s5r->rbuf_len)
2468 /* read more bytes than healthy, why did the client send more!? */
2469 GNUNET_break_op (0);
2470 signal_socks_failure (s5r,
2471 SOCKS5_STATUS_GENERAL_FAILURE);
2474 if (SOCKS5_DATA_TRANSFER == s5r->state)
2476 /* if we are not waiting for GNS resolution, signal success */
2477 signal_socks_success (s5r);
2479 /* We are done reading right now */
2480 GNUNET_SCHEDULER_cancel (s5r->rtask);
2481 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2483 case SOCKS5_RESOLVING:
2486 case SOCKS5_DATA_TRANSFER:
2497 * Accept new incoming connections
2499 * @param cls the closure
2500 * @param tc the scheduler context
2503 do_accept (void *cls,
2504 const struct GNUNET_SCHEDULER_TaskContext *tc)
2506 struct GNUNET_NETWORK_Handle *s;
2507 struct Socks5Request *s5r;
2509 ltask = GNUNET_SCHEDULER_NO_TASK;
2510 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2512 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2515 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
2518 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "accept");
2521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2522 "Got an inbound connection, waiting for data\n");
2523 s5r = GNUNET_new (struct Socks5Request);
2524 GNUNET_CONTAINER_DLL_insert (s5r_head,
2528 s5r->state = SOCKS5_INIT;
2529 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2535 /* ******************* General / main code ********************* */
2539 * Task run on shutdown
2541 * @param cls closure
2542 * @param tc task context
2545 do_shutdown (void *cls,
2546 const struct GNUNET_SCHEDULER_TaskContext *tc)
2548 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2549 "Shutting down...\n");
2550 while (NULL != mhd_httpd_head)
2551 kill_httpd (mhd_httpd_head);
2552 while (NULL != s5r_head)
2553 cleanup_s5r (s5r_head);
2556 GNUNET_NETWORK_socket_close (lsock);
2561 GNUNET_IDENTITY_cancel (id_op);
2564 if (NULL != identity)
2566 GNUNET_IDENTITY_disconnect (identity);
2569 if (NULL != curl_multi)
2571 curl_multi_cleanup (curl_multi);
2574 if (NULL != gns_handle)
2576 GNUNET_GNS_disconnect (gns_handle);
2579 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
2581 GNUNET_SCHEDULER_cancel (curl_download_task);
2582 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
2584 if (GNUNET_SCHEDULER_NO_TASK != ltask)
2586 GNUNET_SCHEDULER_cancel (ltask);
2587 ltask = GNUNET_SCHEDULER_NO_TASK;
2589 gnutls_x509_crt_deinit (proxy_ca.cert);
2590 gnutls_x509_privkey_deinit (proxy_ca.key);
2591 gnutls_global_deinit ();
2596 * Continue initialization after we have our zone information.
2601 struct MhdHttpList *hd;
2602 struct sockaddr_in sa;
2604 /* Open listen socket for socks proxy */
2605 /* FIXME: support IPv6! */
2606 memset (&sa, 0, sizeof (sa));
2607 sa.sin_family = AF_INET;
2608 sa.sin_port = htons (port);
2609 #if HAVE_SOCKADDR_IN_SIN_LEN
2610 sa.sin_len = sizeof (sa);
2612 lsock = GNUNET_NETWORK_socket_create (AF_INET,
2617 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
2618 GNUNET_SCHEDULER_shutdown ();
2622 GNUNET_NETWORK_socket_bind (lsock, (const struct sockaddr *) &sa,
2625 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
2626 GNUNET_SCHEDULER_shutdown ();
2629 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
2631 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "listen");
2634 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2635 lsock, &do_accept, NULL);
2637 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
2639 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2640 "cURL global init failed!\n");
2641 GNUNET_SCHEDULER_shutdown ();
2644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2645 "Proxy listens on port %u\n",
2648 /* start MHD daemon for HTTP */
2649 hd = GNUNET_new (struct MhdHttpList);
2650 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_NO_LISTEN_SOCKET,
2653 &create_response, hd,
2654 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
2655 MHD_OPTION_NOTIFY_COMPLETED, &mhd_completed_cb, NULL,
2656 MHD_OPTION_URI_LOG_CALLBACK, &mhd_log_callback, NULL,
2658 if (NULL == hd->daemon)
2661 GNUNET_SCHEDULER_shutdown ();
2665 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
2670 * Method called to inform about the egos of the shorten zone of this peer.
2672 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
2673 * this function is only called ONCE, and 'NULL' being passed in
2674 * @a ego does indicate an error (i.e. name is taken or no default
2675 * value is known). If @a ego is non-NULL and if '*ctx'
2676 * is set in those callbacks, the value WILL be passed to a subsequent
2677 * call to the identity callback of #GNUNET_IDENTITY_connect (if
2678 * that one was not NULL).
2680 * @param cls closure, NULL
2681 * @param ego ego handle
2682 * @param ctx context for application to store data for this ego
2683 * (during the lifetime of this process, initially NULL)
2684 * @param name name assigned by the user for this ego,
2685 * NULL if the user just deleted the ego and it
2686 * must thus no longer be used
2689 identity_shorten_cb (void *cls,
2690 struct GNUNET_IDENTITY_Ego *ego,
2697 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2698 _("No ego configured for `shorten-zone`\n"));
2702 local_shorten_zone = *GNUNET_IDENTITY_ego_get_private_key (ego);
2703 do_shorten = GNUNET_YES;
2710 * Method called to inform about the egos of the master zone of this peer.
2712 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
2713 * this function is only called ONCE, and 'NULL' being passed in
2714 * @a ego does indicate an error (i.e. name is taken or no default
2715 * value is known). If @a ego is non-NULL and if '*ctx'
2716 * is set in those callbacks, the value WILL be passed to a subsequent
2717 * call to the identity callback of #GNUNET_IDENTITY_connect (if
2718 * that one was not NULL).
2720 * @param cls closure, NULL
2721 * @param ego ego handle
2722 * @param ctx context for application to store data for this ego
2723 * (during the lifetime of this process, initially NULL)
2724 * @param name name assigned by the user for this ego,
2725 * NULL if the user just deleted the ego and it
2726 * must thus no longer be used
2729 identity_master_cb (void *cls,
2730 struct GNUNET_IDENTITY_Ego *ego,
2737 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2738 _("No ego configured for `%s`\n"),
2740 GNUNET_SCHEDULER_shutdown ();
2743 GNUNET_IDENTITY_ego_get_public_key (ego,
2745 id_op = GNUNET_IDENTITY_get (identity,
2747 &identity_shorten_cb,
2753 * Main function that will be run
2755 * @param cls closure
2756 * @param args remaining command-line arguments
2757 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
2758 * @param c configuration
2761 run (void *cls, char *const *args, const char *cfgfile,
2762 const struct GNUNET_CONFIGURATION_Handle *c)
2764 char* cafile_cfg = NULL;
2768 if (NULL == (curl_multi = curl_multi_init ()))
2770 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2771 "Failed to create cURL multi handle!\n");
2774 cafile = cafile_opt;
2777 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
2781 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2786 cafile = cafile_cfg;
2788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2789 "Using %s as CA\n", cafile);
2791 gnutls_global_init ();
2792 gnutls_x509_crt_init (&proxy_ca.cert);
2793 gnutls_x509_privkey_init (&proxy_ca.key);
2795 if ( (GNUNET_OK != load_cert_from_file (proxy_ca.cert, cafile)) ||
2796 (GNUNET_OK != load_key_from_file (proxy_ca.key, cafile)) )
2798 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2799 _("Failed to load SSL/TLS key and certificate from `%s'\n"),
2801 gnutls_x509_crt_deinit (proxy_ca.cert);
2802 gnutls_x509_privkey_deinit (proxy_ca.key);
2803 gnutls_global_deinit ();
2804 GNUNET_free_non_null (cafile_cfg);
2807 GNUNET_free_non_null (cafile_cfg);
2808 if (NULL == (gns_handle = GNUNET_GNS_connect (cfg)))
2810 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2811 "Unable to connect to GNS!\n");
2812 gnutls_x509_crt_deinit (proxy_ca.cert);
2813 gnutls_x509_privkey_deinit (proxy_ca.key);
2814 gnutls_global_deinit ();
2817 identity = GNUNET_IDENTITY_connect (cfg,
2819 id_op = GNUNET_IDENTITY_get (identity,
2821 &identity_master_cb,
2823 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2824 &do_shutdown, NULL);
2829 * The main function for gnunet-gns-proxy.
2831 * @param argc number of arguments from the command line
2832 * @param argv command line arguments
2833 * @return 0 ok, 1 on error
2836 main (int argc, char *const *argv)
2838 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
2840 gettext_noop ("listen on specified port (default: 7777)"), 1,
2841 &GNUNET_GETOPT_set_ulong, &port},
2842 {'a', "authority", NULL,
2843 gettext_noop ("pem file to use as CA"), 1,
2844 &GNUNET_GETOPT_set_string, &cafile_opt},
2845 GNUNET_GETOPT_OPTION_END
2847 static const char* page =
2848 "<html><head><title>gnunet-gns-proxy</title>"
2849 "</head><body>cURL fail</body></html>";
2852 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
2854 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
2855 curl_failure_response = MHD_create_response_from_buffer (strlen (page),
2857 MHD_RESPMEM_PERSISTENT);
2861 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
2862 _("GNUnet GNS proxy"),
2864 &run, NULL)) ? 0 : 1;
2865 MHD_destroy_response (curl_failure_response);
2866 GNUNET_free_non_null ((char *) argv);
2867 GNUNET_CRYPTO_ecc_key_clear (&local_shorten_zone);
2871 /* end of gnunet-gns-proxy.c */