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 * - actually check SSL certificates (#3038)
32 #include <microhttpd.h>
33 #include <curl/curl.h>
34 #include <gnutls/gnutls.h>
35 #include <gnutls/x509.h>
36 #include <gnutls/abstract.h>
37 #include <gnutls/crypto.h>
39 #include "gnunet_util_lib.h"
40 #include "gnunet_gns_service.h"
41 #include "gnunet_identity_service.h"
46 * Default Socks5 listen port.
48 #define GNUNET_GNS_PROXY_PORT 7777
51 * Maximum supported length for a URI.
52 * Should die. @deprecated
54 #define MAX_HTTP_URI_LENGTH 2048
57 * Size of the buffer for the data upload / download. Must be
58 * enough for curl, thus CURL_MAX_WRITE_SIZE is needed here (16k).
60 #define IO_BUFFERSIZE CURL_MAX_WRITE_SIZE
63 * Size of the read/write buffers for Socks. Uses
64 * 256 bytes for the hostname (at most), plus a few
65 * bytes overhead for the messages.
67 #define SOCKS_BUFFERSIZE (256 + 32)
70 * Port for plaintext HTTP.
77 #define HTTPS_PORT 443
80 * Largest allowed size for a PEM certificate.
82 #define MAX_PEM_SIZE (10 * 1024)
85 * After how long do we clean up unused MHD SSL/TLS instances?
87 #define MHD_CACHE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
90 * After how long do we clean up Socks5 handles that failed to show any activity
91 * with their respective MHD instance?
93 #define HTTP_HANDSHAKE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
99 * @param level log level
100 * @param fun name of curl_easy-function that gave the error
101 * @param rc return code from curl
103 #define LOG_CURL_EASY(level,fun,rc) GNUNET_log(level, _("%s failed at %s:%d: `%s'\n"), fun, __FILE__, __LINE__, curl_easy_strerror (rc))
106 /* *************** Socks protocol definitions (move to TUN?) ****************** */
109 * Which SOCKS version do we speak?
111 #define SOCKS_VERSION_5 0x05
114 * Flag to set for 'no authentication'.
116 #define SOCKS_AUTH_NONE 0
120 * Commands in Socks5.
125 * Establish TCP/IP stream.
127 SOCKS5_CMD_TCP_STREAM = 1,
130 * Establish TCP port binding.
132 SOCKS5_CMD_TCP_PORT = 2,
135 * Establish UDP port binding.
137 SOCKS5_CMD_UDP_PORT = 3
142 * Address types in Socks5.
144 enum Socks5AddressType
154 SOCKS5_AT_DOMAINNAME = 3,
165 * Status codes in Socks5 response.
167 enum Socks5StatusCode
169 SOCKS5_STATUS_REQUEST_GRANTED = 0,
170 SOCKS5_STATUS_GENERAL_FAILURE = 1,
171 SOCKS5_STATUS_CONNECTION_NOT_ALLOWED_BY_RULE = 2,
172 SOCKS5_STATUS_NETWORK_UNREACHABLE = 3,
173 SOCKS5_STATUS_HOST_UNREACHABLE = 4,
174 SOCKS5_STATUS_CONNECTION_REFUSED_BY_HOST = 5,
175 SOCKS5_STATUS_TTL_EXPIRED = 6,
176 SOCKS5_STATUS_COMMAND_NOT_SUPPORTED = 7,
177 SOCKS5_STATUS_ADDRESS_TYPE_NOT_SUPPORTED = 8
182 * Client hello in Socks5 protocol.
184 struct Socks5ClientHelloMessage
187 * Should be #SOCKS_VERSION_5.
192 * How many authentication methods does the client support.
194 uint8_t num_auth_methods;
196 /* followed by supported authentication methods, 1 byte per method */
202 * Server hello in Socks5 protocol.
204 struct Socks5ServerHelloMessage
207 * Should be #SOCKS_VERSION_5.
212 * Chosen authentication method, for us always #SOCKS_AUTH_NONE,
213 * which skips the authentication step.
220 * Client socks request in Socks5 protocol.
222 struct Socks5ClientRequestMessage
225 * Should be #SOCKS_VERSION_5.
230 * Command code, we only uspport #SOCKS5_CMD_TCP_STREAM.
235 * Reserved, always zero.
240 * Address type, an `enum Socks5AddressType`.
245 * Followed by either an ip4/ipv6 address or a domain name with a
246 * length field (uint8_t) in front (depending on @e addr_type).
247 * followed by port number in network byte order (uint16_t).
253 * Server response to client requests in Socks5 protocol.
255 struct Socks5ServerResponseMessage
258 * Should be #SOCKS_VERSION_5.
263 * Status code, an `enum Socks5StatusCode`
273 * Address type, an `enum Socks5AddressType`.
278 * Followed by either an ip4/ipv6 address or a domain name with a
279 * length field (uint8_t) in front (depending on @e addr_type).
280 * followed by port number in network byte order (uint16_t).
287 /* *********************** Datastructures for HTTP handling ****************** */
290 * A structure for CA cert/key
297 gnutls_x509_crt_t cert;
302 gnutls_x509_privkey_t key;
307 * Structure for GNS certificates
309 struct ProxyGNSCertificate
312 * The certificate as PEM
314 char cert[MAX_PEM_SIZE];
317 * The private key as PEM
319 char key[MAX_PEM_SIZE];
325 * A structure for all running Httpds
332 struct MhdHttpList *prev;
337 struct MhdHttpList *next;
340 * the domain name to server (only important for SSL)
347 struct MHD_Daemon *daemon;
350 * Optional proxy certificate used
352 struct ProxyGNSCertificate *proxy_cert;
357 GNUNET_SCHEDULER_TaskIdentifier httpd_task;
360 * is this an ssl daemon?
367 /* ***************** Datastructures for Socks handling **************** */
376 * We're waiting to get the client hello.
381 * We're waiting to get the initial request.
386 * We are currently resolving the destination.
391 * We're in transfer mode.
393 SOCKS5_DATA_TRANSFER,
396 * Finish writing the write buffer, then clean up.
398 SOCKS5_WRITE_THEN_CLEANUP,
401 * Socket has been passed to MHD, do not close it anymore.
403 SOCKS5_SOCKET_WITH_MHD,
406 * We've finished receiving upload data from MHD.
408 SOCKS5_SOCKET_UPLOAD_STARTED,
411 * We've finished receiving upload data from MHD.
413 SOCKS5_SOCKET_UPLOAD_DONE,
416 * We've finished uploading data via CURL and can now download.
418 SOCKS5_SOCKET_DOWNLOAD_STARTED,
421 * We've finished receiving download data from cURL.
423 SOCKS5_SOCKET_DOWNLOAD_DONE
429 * A structure for socks requests
437 struct Socks5Request *next;
442 struct Socks5Request *prev;
447 struct GNUNET_NETWORK_Handle *sock;
450 * Handle to GNS lookup, during #SOCKS5_RESOLVING phase.
452 struct GNUNET_GNS_LookupRequest *gns_lookup;
455 * Client socket read task
457 GNUNET_SCHEDULER_TaskIdentifier rtask;
460 * Client socket write task
462 GNUNET_SCHEDULER_TaskIdentifier wtask;
467 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
472 char rbuf[SOCKS_BUFFERSIZE];
477 char wbuf[SOCKS_BUFFERSIZE];
480 * Buffer we use for moving data between MHD and curl (in both directions).
482 char io_buf[IO_BUFFERSIZE];
485 * MHD HTTP instance handling this request, NULL for none.
487 struct MhdHttpList *hd;
490 * MHD response object for this request.
492 struct MHD_Response *response;
495 * the domain name to server (only important for SSL)
500 * DNS Legacy Host Name as given by GNS, NULL if not given.
515 * HTTP request headers for the curl request.
517 struct curl_slist *headers;
520 * HTTP response code to give to MHD for the response.
522 unsigned int response_code;
525 * Number of bytes already in read buffer
530 * Number of bytes already in write buffer
535 * Number of bytes already in the IO buffer.
540 * Once known, what's the target address for the connection?
542 struct sockaddr_storage destination_address;
547 enum SocksPhase state;
550 * Desired destination port.
558 /* *********************** Globals **************************** */
562 * The port the proxy is running on (default 7777)
564 static unsigned long port = GNUNET_GNS_PROXY_PORT;
567 * The CA file (pem) to use for the proxy CA
569 static char *cafile_opt;
572 * The listen socket of the proxy
574 static struct GNUNET_NETWORK_Handle *lsock;
579 static GNUNET_SCHEDULER_TaskIdentifier ltask;
582 * The cURL download task (curl multi API).
584 static GNUNET_SCHEDULER_TaskIdentifier curl_download_task;
587 * The cURL multi handle
589 static CURLM *curl_multi;
592 * Handle to the GNS service
594 static struct GNUNET_GNS_Handle *gns_handle;
597 * DLL for http/https daemons
599 static struct MhdHttpList *mhd_httpd_head;
602 * DLL for http/https daemons
604 static struct MhdHttpList *mhd_httpd_tail;
607 * Daemon for HTTP (we have one per SSL certificate, and then one for
608 * all HTTP connections; this is the one for HTTP, not HTTPS).
610 static struct MhdHttpList *httpd;
613 * DLL of active socks requests.
615 static struct Socks5Request *s5r_head;
618 * DLL of active socks requests.
620 static struct Socks5Request *s5r_tail;
623 * The users local GNS master zone
625 static struct GNUNET_CRYPTO_EcdsaPublicKey local_gns_zone;
628 * The users local shorten zone
630 static struct GNUNET_CRYPTO_EcdsaPrivateKey local_shorten_zone;
633 * Is shortening enabled?
635 static int do_shorten;
638 * The CA for SSL certificate generation
640 static struct ProxyCA proxy_ca;
643 * Response we return on cURL failures.
645 static struct MHD_Response *curl_failure_response;
648 * Connection to identity service.
650 static struct GNUNET_IDENTITY_Handle *identity;
653 * Request for our ego.
655 static struct GNUNET_IDENTITY_Operation *id_op;
660 static const struct GNUNET_CONFIGURATION_Handle *cfg;
663 /* ************************* Global helpers ********************* */
667 * Run MHD now, we have extra data ready for the callback.
669 * @param hd the daemon to run now.
672 run_mhd_now (struct MhdHttpList *hd);
676 * Clean up s5r handles.
678 * @param s5r the handle to destroy
681 cleanup_s5r (struct Socks5Request *s5r)
683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
684 "Cleaning up socks request\n");
685 if (NULL != s5r->curl)
687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
688 "Cleaning up cURL handle\n");
689 curl_multi_remove_handle (curl_multi, s5r->curl);
690 curl_easy_cleanup (s5r->curl);
693 curl_slist_free_all (s5r->headers);
694 if ( (NULL != s5r->response) &&
695 (curl_failure_response != s5r->response) )
696 MHD_destroy_response (s5r->response);
697 if (GNUNET_SCHEDULER_NO_TASK != s5r->rtask)
698 GNUNET_SCHEDULER_cancel (s5r->rtask);
699 if (GNUNET_SCHEDULER_NO_TASK != s5r->timeout_task)
700 GNUNET_SCHEDULER_cancel (s5r->timeout_task);
701 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
702 GNUNET_SCHEDULER_cancel (s5r->wtask);
703 if (NULL != s5r->gns_lookup)
704 GNUNET_GNS_lookup_cancel (s5r->gns_lookup);
705 if (NULL != s5r->sock)
707 if (SOCKS5_SOCKET_WITH_MHD <= s5r->state)
708 GNUNET_NETWORK_socket_free_memory_only_ (s5r->sock);
710 GNUNET_NETWORK_socket_close (s5r->sock);
712 GNUNET_CONTAINER_DLL_remove (s5r_head,
715 GNUNET_free_non_null (s5r->domain);
716 GNUNET_free_non_null (s5r->leho);
717 GNUNET_free_non_null (s5r->url);
722 /* ************************* HTTP handling with cURL *********************** */
726 * Callback for MHD response generation. This function is called from
727 * MHD whenever MHD expects to get data back. Copies data from the
728 * io_buf, if available.
730 * @param cls closure with our `struct Socks5Request`
731 * @param pos in buffer
732 * @param buf where to copy data
733 * @param max available space in @a buf
734 * @return number of bytes written to @a buf
737 mhd_content_cb (void *cls,
742 struct Socks5Request *s5r = cls;
743 size_t bytes_to_copy;
745 if ( (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state) ||
746 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
748 /* we're still not done with the upload, do not yet
749 start the download, the IO buffer is still full
751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
752 "Pausing MHD download, not yet ready for download\n");
753 return 0; /* not yet ready for data download */
755 bytes_to_copy = GNUNET_MIN (max,
757 if ( (0 == bytes_to_copy) &&
758 (SOCKS5_SOCKET_DOWNLOAD_DONE != s5r->state) )
760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
761 "Pausing MHD download, no data available\n");
762 return 0; /* more data later */
764 if ( (0 == bytes_to_copy) &&
765 (SOCKS5_SOCKET_DOWNLOAD_DONE == s5r->state) )
767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
768 "Completed MHD download\n");
769 return MHD_CONTENT_READER_END_OF_STREAM;
771 memcpy (buf, s5r->io_buf, bytes_to_copy);
772 memmove (s5r->io_buf,
773 &s5r->io_buf[bytes_to_copy],
774 s5r->io_len - bytes_to_copy);
775 s5r->io_len -= bytes_to_copy;
776 if (NULL != s5r->curl)
777 curl_easy_pause (s5r->curl, CURLPAUSE_CONT);
778 return bytes_to_copy;
783 * Check that the website has presented us with a valid SSL certificate.
784 * The certificate must either match the domain name or the LEHO name
785 * (or, if available, the TLSA record).
787 * @param s5r request to check for.
788 * @return #GNUNET_OK if the certificate is valid
791 check_ssl_certificate (struct Socks5Request *s5r)
795 gnutls_session_t session;
796 struct curl_slist * to_slist;
798 unsigned int cert_list_size;
799 const gnutls_datum_t *chainp;
801 gptr.to_slist = NULL;
803 curl_easy_getinfo (s5r->curl,
804 CURLINFO_GNUTLS_SESSION,
806 return GNUNET_SYSERR;
808 chainp = gnutls_certificate_get_peers(gptr.session, &cert_list_size);
810 return GNUNET_SYSERR;
812 for(i=0;i<cert_list_size;i++) {
813 gnutls_x509_crt_t cert;
816 if(GNUTLS_E_SUCCESS == gnutls_x509_crt_init (&cert)) {
817 if((GNUTLS_E_SUCCESS ==
818 gnutls_x509_crt_import (cert, &chainp[i],
819 GNUTLS_X509_FMT_DER)) &&
821 gnutls_x509_crt_print (cert,
822 GNUTLS_CRT_PRINT_FULL,
824 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
825 "Certificate #%d: %.*s", i, dn.size, dn.data);
826 gnutls_free (dn.data);
827 gnutls_x509_crt_deinit (cert);
836 * We're getting an HTTP response header from cURL. Convert it to the
837 * MHD response headers. Mostly copies the headers, but makes special
838 * adjustments to "Set-Cookie" and "Location" headers as those may need
839 * to be changed from the LEHO to the domain the browser expects.
841 * @param buffer curl buffer with a single line of header data; not 0-terminated!
842 * @param size curl blocksize
843 * @param nmemb curl blocknumber
844 * @param cls our `struct Socks5Request *`
845 * @return size of processed bytes
848 curl_check_hdr (void *buffer, size_t size, size_t nmemb, void *cls)
850 struct Socks5Request *s5r = cls;
851 size_t bytes = size * nmemb;
853 const char *hdr_type;
854 const char *cookie_domain;
857 char *new_cookie_hdr;
860 size_t delta_cdomain;
864 if (NULL == s5r->response)
866 /* first, check SSL certificate */
867 if ( (HTTPS_PORT == s5r->port) &&
868 (GNUNET_OK != check_ssl_certificate (s5r)) )
871 GNUNET_break (CURLE_OK ==
872 curl_easy_getinfo (s5r->curl,
873 CURLINFO_RESPONSE_CODE,
875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
876 "Creating MHD response with code %d\n",
878 s5r->response_code = resp_code;
879 s5r->response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
884 if (NULL != s5r->leho)
888 GNUNET_asprintf (&cors_hdr,
889 (HTTPS_PORT == s5r->port)
894 GNUNET_break (MHD_YES ==
895 MHD_add_response_header (s5r->response,
896 MHD_HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN,
898 GNUNET_free (cors_hdr);
900 /* force connection to be closed after each request, as we
901 do not support HTTP pipelining */
902 GNUNET_break (MHD_YES ==
903 MHD_add_response_header (s5r->response,
904 MHD_HTTP_HEADER_CONNECTION,
908 ndup = GNUNET_strndup (buffer, bytes);
909 hdr_type = strtok (ndup, ":");
910 if (NULL == hdr_type)
915 hdr_val = strtok (NULL, "");
924 /* custom logic for certain header types */
925 new_cookie_hdr = NULL;
926 if ( (NULL != s5r->leho) &&
927 (0 == strcasecmp (hdr_type,
928 MHD_HTTP_HEADER_SET_COOKIE)) )
931 new_cookie_hdr = GNUNET_malloc (strlen (hdr_val) +
932 strlen (s5r->domain) + 1);
934 domain_matched = GNUNET_NO; /* make sure we match domain at most once */
935 for (tok = strtok (hdr_val, ";"); NULL != tok; tok = strtok (NULL, ";"))
937 if ( (0 == strncasecmp (tok, " domain", strlen (" domain"))) &&
938 (GNUNET_NO == domain_matched) )
940 domain_matched = GNUNET_YES;
941 cookie_domain = tok + strlen (" domain") + 1;
942 if (strlen (cookie_domain) < strlen (s5r->leho))
944 delta_cdomain = strlen (s5r->leho) - strlen (cookie_domain);
945 if (0 == strcasecmp (cookie_domain, s5r->leho + delta_cdomain))
947 offset += sprintf (new_cookie_hdr + offset,
953 else if (0 == strcmp (cookie_domain, s5r->leho))
955 offset += sprintf (new_cookie_hdr + offset,
960 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
961 _("Cookie domain `%s' supplied by server is invalid\n"),
964 memcpy (new_cookie_hdr + offset, tok, strlen (tok));
965 offset += strlen (tok);
966 new_cookie_hdr[offset++] = ';';
968 hdr_val = new_cookie_hdr;
972 if (0 == strcasecmp (MHD_HTTP_HEADER_LOCATION, hdr_type))
976 GNUNET_asprintf (&leho_host,
977 (HTTPS_PORT != s5r->port)
981 if (0 == strncmp (leho_host,
985 GNUNET_asprintf (&new_location,
987 (HTTPS_PORT != s5r->port)
991 hdr_val + strlen (leho_host));
992 hdr_val = new_location;
994 GNUNET_free (leho_host);
996 /* MHD does not allow certain characters in values, remove those */
997 if (NULL != (tok = strchr (hdr_val, '\n')))
999 if (NULL != (tok = strchr (hdr_val, '\r')))
1001 if (NULL != (tok = strchr (hdr_val, '\t')))
1003 if (0 != strlen (hdr_val))
1005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1006 "Adding header %s: %s to MHD response\n",
1009 GNUNET_break (MHD_YES ==
1010 MHD_add_response_header (s5r->response,
1015 GNUNET_free_non_null (new_cookie_hdr);
1016 GNUNET_free_non_null (new_location);
1022 * Handle response payload data from cURL. Copies it into our `io_buf` to make
1023 * it available to MHD.
1025 * @param ptr pointer to the data
1026 * @param size number of blocks of data
1027 * @param nmemb blocksize
1028 * @param ctx our `struct Socks5Request *`
1029 * @return number of bytes handled
1032 curl_download_cb (void *ptr, size_t size, size_t nmemb, void* ctx)
1034 struct Socks5Request *s5r = ctx;
1035 size_t total = size * nmemb;
1037 if ( (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state) ||
1038 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
1040 /* we're still not done with the upload, do not yet
1041 start the download, the IO buffer is still full
1042 with upload data. */
1043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1044 "Pausing CURL download, waiting for UPLOAD to finish\n");
1045 return CURL_WRITEFUNC_PAUSE; /* not yet ready for data download */
1047 if (sizeof (s5r->io_buf) - s5r->io_len < total)
1049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1050 "Pausing CURL download, not enough space\n");
1051 return CURL_WRITEFUNC_PAUSE; /* not enough space */
1053 memcpy (&s5r->io_buf[s5r->io_len],
1056 s5r->io_len += total;
1057 if (s5r->io_len == total)
1058 run_mhd_now (s5r->hd);
1064 * cURL callback for uploaded (PUT/POST) data. Copies it into our `io_buf`
1065 * to make it available to MHD.
1067 * @param buf where to write the data
1068 * @param size number of bytes per member
1069 * @param nmemb number of members available in @a buf
1070 * @param cls our `struct Socks5Request` that generated the data
1071 * @return number of bytes copied to @a buf
1074 curl_upload_cb (void *buf, size_t size, size_t nmemb, void *cls)
1076 struct Socks5Request *s5r = cls;
1077 size_t len = size * nmemb;
1080 if ( (0 == s5r->io_len) &&
1081 (SOCKS5_SOCKET_UPLOAD_DONE != s5r->state) )
1083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1084 "Pausing CURL UPLOAD, need more data\n");
1085 return CURL_READFUNC_PAUSE;
1087 if ( (0 == s5r->io_len) &&
1088 (SOCKS5_SOCKET_UPLOAD_DONE == s5r->state) )
1090 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1092 "Completed CURL UPLOAD\n");
1093 return 0; /* upload finished, can now download */
1095 if ( (SOCKS5_SOCKET_UPLOAD_STARTED != s5r->state) ||
1096 (SOCKS5_SOCKET_UPLOAD_DONE != s5r->state) )
1099 return CURL_READFUNC_ABORT;
1101 to_copy = GNUNET_MIN (s5r->io_len,
1103 memcpy (buf, s5r->io_buf, to_copy);
1104 memmove (s5r->io_buf,
1105 &s5r->io_buf[to_copy],
1106 s5r->io_len - to_copy);
1107 s5r->io_len -= to_copy;
1108 if (s5r->io_len + to_copy == sizeof (s5r->io_buf))
1109 run_mhd_now (s5r->hd); /* got more space for upload now */
1114 /* ************************** main loop of cURL interaction ****************** */
1118 * Task that is run when we are ready to receive more data
1121 * @param cls closure
1122 * @param tc task context
1125 curl_task_download (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1129 * Ask cURL for the select() sets and schedule cURL operations.
1132 curl_download_prepare ()
1139 struct GNUNET_NETWORK_FDSet *grs;
1140 struct GNUNET_NETWORK_FDSet *gws;
1142 struct GNUNET_TIME_Relative rtime;
1144 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
1146 GNUNET_SCHEDULER_cancel (curl_download_task);
1147 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1153 if (CURLM_OK != (mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max)))
1155 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1156 "%s failed at %s:%d: `%s'\n",
1157 "curl_multi_fdset", __FILE__, __LINE__,
1158 curl_multi_strerror (mret));
1162 GNUNET_break (CURLM_OK == curl_multi_timeout (curl_multi, &to));
1164 rtime = GNUNET_TIME_UNIT_FOREVER_REL;
1166 rtime = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, to);
1169 grs = GNUNET_NETWORK_fdset_create ();
1170 gws = GNUNET_NETWORK_fdset_create ();
1171 GNUNET_NETWORK_fdset_copy_native (grs, &rs, max + 1);
1172 GNUNET_NETWORK_fdset_copy_native (gws, &ws, max + 1);
1173 curl_download_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1176 &curl_task_download, curl_multi);
1177 GNUNET_NETWORK_fdset_destroy (gws);
1178 GNUNET_NETWORK_fdset_destroy (grs);
1182 curl_download_task = GNUNET_SCHEDULER_add_delayed (rtime,
1183 &curl_task_download,
1190 * Task that is run when we are ready to receive more data from curl.
1192 * @param cls closure, NULL
1193 * @param tc task context
1196 curl_task_download (void *cls,
1197 const struct GNUNET_SCHEDULER_TaskContext *tc)
1201 struct CURLMsg *msg;
1203 struct Socks5Request *s5r;
1205 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
1209 mret = curl_multi_perform (curl_multi, &running);
1210 while (NULL != (msg = curl_multi_info_read (curl_multi, &msgnum)))
1212 GNUNET_break (CURLE_OK ==
1213 curl_easy_getinfo (msg->easy_handle,
1224 /* documentation says this is not used */
1228 switch (msg->data.result)
1231 case CURLE_GOT_NOTHING:
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1233 "CURL download completed.\n");
1234 s5r->state = SOCKS5_SOCKET_DOWNLOAD_DONE;
1235 run_mhd_now (s5r->hd);
1238 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1239 "Download curl failed: %s\n",
1240 curl_easy_strerror (msg->data.result));
1241 /* FIXME: indicate error somehow? close MHD connection badly as well? */
1242 s5r->state = SOCKS5_SOCKET_DOWNLOAD_DONE;
1243 run_mhd_now (s5r->hd);
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1247 "Cleaning up cURL handle\n");
1248 curl_multi_remove_handle (curl_multi, s5r->curl);
1249 curl_easy_cleanup (s5r->curl);
1251 if (NULL == s5r->response)
1252 s5r->response = curl_failure_response;
1255 /* documentation says this is not used */
1259 /* unexpected status code */
1264 } while (mret == CURLM_CALL_MULTI_PERFORM);
1265 if (CURLM_OK != mret)
1266 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1267 "%s failed at %s:%d: `%s'\n",
1268 "curl_multi_perform", __FILE__, __LINE__,
1269 curl_multi_strerror (mret));
1272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1273 "Suspending cURL multi loop, no more events pending\n");
1274 return; /* nothing more in progress */
1276 curl_download_prepare();
1280 /* ********************************* MHD response generation ******************* */
1284 * Read HTTP request header field from the request. Copies the fields
1285 * over to the 'headers' that will be given to curl. However, 'Host'
1286 * is substituted with the LEHO if present. We also change the
1287 * 'Connection' header value to "close" as the proxy does not support
1290 * @param cls our `struct Socks5Request`
1291 * @param kind value kind
1292 * @param key field key
1293 * @param value field value
1294 * @return MHD_YES to continue to iterate
1297 con_val_iter (void *cls,
1298 enum MHD_ValueKind kind,
1302 struct Socks5Request *s5r = cls;
1305 if ( (0 == strcasecmp (MHD_HTTP_HEADER_HOST, key)) &&
1306 (NULL != s5r->leho) )
1308 if (0 == strcasecmp (MHD_HTTP_HEADER_CONNECTION, key))
1310 GNUNET_asprintf (&hdr,
1314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1315 "Adding HEADER `%s' to HTTP request\n",
1317 s5r->headers = curl_slist_append (s5r->headers,
1325 * Main MHD callback for handling requests.
1328 * @param con MHD connection handle
1329 * @param url the url in the request
1330 * @param meth the HTTP method used ("GET", "PUT", etc.)
1331 * @param ver the HTTP version string (i.e. "HTTP/1.1")
1332 * @param upload_data the data being uploaded (excluding HEADERS,
1333 * for a POST that fits into memory and that is encoded
1334 * with a supported encoding, the POST data will NOT be
1335 * given in upload_data and is instead available as
1336 * part of MHD_get_connection_values; very large POST
1337 * data *will* be made available incrementally in
1339 * @param upload_data_size set initially to the size of the
1340 * @a upload_data provided; the method must update this
1341 * value to the number of bytes NOT processed;
1342 * @param con_cls pointer to location where we store the 'struct Request'
1343 * @return MHD_YES if the connection was handled successfully,
1344 * MHD_NO if the socket must be closed due to a serious
1345 * error while handling the request
1348 create_response (void *cls,
1349 struct MHD_Connection *con,
1353 const char *upload_data,
1354 size_t *upload_data_size,
1357 /* struct MhdHttpList* hd = cls; */
1358 struct Socks5Request *s5r = *con_cls;
1360 char ipstring[INET6_ADDRSTRLEN];
1361 char ipaddr[INET6_ADDRSTRLEN + 2];
1362 const struct sockaddr *sa;
1363 const struct sockaddr_in *s4;
1364 const struct sockaddr_in6 *s6;
1373 if ( (NULL == s5r->curl) &&
1374 (SOCKS5_SOCKET_WITH_MHD == s5r->state) )
1376 /* first time here, initialize curl handle */
1377 sa = (const struct sockaddr *) &s5r->destination_address;
1378 switch (sa->sa_family)
1381 s4 = (const struct sockaddr_in *) &s5r->destination_address;
1382 if (NULL == inet_ntop (AF_INET,
1390 GNUNET_snprintf (ipaddr,
1394 port = ntohs (s4->sin_port);
1397 s6 = (const struct sockaddr_in6 *) &s5r->destination_address;
1398 if (NULL == inet_ntop (AF_INET6,
1406 GNUNET_snprintf (ipaddr,
1410 port = ntohs (s6->sin6_port);
1416 s5r->curl = curl_easy_init ();
1417 if (NULL == s5r->curl)
1418 return MHD_queue_response (con,
1419 MHD_HTTP_INTERNAL_SERVER_ERROR,
1420 curl_failure_response);
1421 curl_easy_setopt (s5r->curl, CURLOPT_HEADERFUNCTION, &curl_check_hdr);
1422 curl_easy_setopt (s5r->curl, CURLOPT_HEADERDATA, s5r);
1423 curl_easy_setopt (s5r->curl, CURLOPT_FOLLOWLOCATION, 0);
1424 curl_easy_setopt (s5r->curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
1425 curl_easy_setopt (s5r->curl, CURLOPT_CONNECTTIMEOUT, 600L);
1426 curl_easy_setopt (s5r->curl, CURLOPT_TIMEOUT, 600L);
1427 curl_easy_setopt (s5r->curl, CURLOPT_NOSIGNAL, 1L);
1428 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_CONTENT_DECODING, 0);
1429 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_TRANSFER_DECODING, 0);
1430 curl_easy_setopt (s5r->curl, CURLOPT_NOSIGNAL, 1L);
1431 curl_easy_setopt (s5r->curl, CURLOPT_PRIVATE, s5r);
1432 curl_easy_setopt (s5r->curl, CURLOPT_VERBOSE, 0); // FIXME: remove later
1433 GNUNET_asprintf (&curlurl,
1434 (HTTPS_PORT != s5r->port)
1436 : "https://%s:%d%s",
1440 curl_easy_setopt (s5r->curl,
1443 GNUNET_free (curlurl);
1445 if (0 == strcasecmp (meth, MHD_HTTP_METHOD_PUT))
1447 s5r->state = SOCKS5_SOCKET_UPLOAD_STARTED;
1448 curl_easy_setopt (s5r->curl, CURLOPT_UPLOAD, 1);
1449 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1450 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1451 curl_easy_setopt (s5r->curl, CURLOPT_READFUNCTION, &curl_upload_cb);
1452 curl_easy_setopt (s5r->curl, CURLOPT_READDATA, s5r);
1454 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_POST))
1456 s5r->state = SOCKS5_SOCKET_UPLOAD_STARTED;
1457 curl_easy_setopt (s5r->curl, CURLOPT_POST, 1);
1458 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1459 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1460 curl_easy_setopt (s5r->curl, CURLOPT_READFUNCTION, &curl_upload_cb);
1461 curl_easy_setopt (s5r->curl, CURLOPT_READDATA, s5r);
1463 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_HEAD))
1465 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1466 curl_easy_setopt (s5r->curl, CURLOPT_NOBODY, 1);
1468 else if (0 == strcasecmp (meth, MHD_HTTP_METHOD_GET))
1470 s5r->state = SOCKS5_SOCKET_DOWNLOAD_STARTED;
1471 curl_easy_setopt (s5r->curl, CURLOPT_HTTPGET, 1);
1472 curl_easy_setopt (s5r->curl, CURLOPT_WRITEFUNCTION, &curl_download_cb);
1473 curl_easy_setopt (s5r->curl, CURLOPT_WRITEDATA, s5r);
1477 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1478 _("Unsupported HTTP method `%s'\n"),
1480 curl_easy_cleanup (s5r->curl);
1485 if (0 == strcasecmp (ver, MHD_HTTP_VERSION_1_0))
1487 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
1489 else if (0 == strcasecmp (ver, MHD_HTTP_VERSION_1_1))
1491 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
1495 curl_easy_setopt (s5r->curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_NONE);
1498 if (HTTPS_PORT == s5r->port)
1500 curl_easy_setopt (s5r->curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
1501 curl_easy_setopt (s5r->curl, CURLOPT_SSL_VERIFYPEER, 1L);
1502 /* Disable cURL checking the hostname, as we will check ourselves
1503 as only we have the domain name or the LEHO or the DANE record */
1504 curl_easy_setopt (s5r->curl, CURLOPT_SSL_VERIFYHOST, 0L);
1508 curl_easy_setopt (s5r->curl, CURLOPT_USE_SSL, CURLUSESSL_NONE);
1511 if (CURLM_OK != curl_multi_add_handle (curl_multi, s5r->curl))
1514 curl_easy_cleanup (s5r->curl);
1518 MHD_get_connection_values (con,
1520 &con_val_iter, s5r);
1521 curl_easy_setopt (s5r->curl, CURLOPT_HTTPHEADER, s5r->headers);
1522 curl_download_prepare ();
1526 /* continuing to process request */
1527 if (0 != *upload_data_size)
1529 left = GNUNET_MIN (*upload_data_size,
1530 sizeof (s5r->io_buf) - s5r->io_len);
1531 memcpy (&s5r->io_buf[s5r->io_len],
1534 s5r->io_len += left;
1535 *upload_data_size -= left;
1536 GNUNET_assert (NULL != s5r->curl);
1537 curl_easy_pause (s5r->curl, CURLPAUSE_CONT);
1538 curl_download_prepare ();
1541 if (SOCKS5_SOCKET_UPLOAD_STARTED == s5r->state)
1543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1544 "Finished processing UPLOAD\n");
1545 s5r->state = SOCKS5_SOCKET_UPLOAD_DONE;
1547 if (NULL == s5r->response)
1548 return MHD_YES; /* too early to queue response, did not yet get headers from cURL */
1549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1550 "Queueing response with MHD\n");
1551 return MHD_queue_response (con,
1557 /* ******************** MHD HTTP setup and event loop ******************** */
1561 * Function called when MHD decides that we are done with a connection.
1564 * @param connection connection handle
1565 * @param con_cls value as set by the last call to
1566 * the MHD_AccessHandlerCallback, should be our `struct Socks5Request`
1567 * @param toe reason for request termination (ignored)
1570 mhd_completed_cb (void *cls,
1571 struct MHD_Connection *connection,
1573 enum MHD_RequestTerminationCode toe)
1575 struct Socks5Request *s5r = *con_cls;
1579 if (MHD_REQUEST_TERMINATED_COMPLETED_OK != toe)
1580 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1581 "MHD encountered error handling request: %d\n",
1589 * Function called when MHD first processes an incoming connection.
1590 * Gives us the respective URI information.
1592 * We use this to associate the `struct MHD_Connection` with our
1593 * internal `struct Socks5Request` data structure (by checking
1594 * for matching sockets).
1596 * @param cls the HTTP server handle (a `struct MhdHttpList`)
1597 * @param url the URL that is being requested
1598 * @param connection MHD connection object for the request
1599 * @return the `struct Socks5Request` that this @a connection is for
1602 mhd_log_callback (void *cls,
1604 struct MHD_Connection *connection)
1606 struct Socks5Request *s5r;
1607 const union MHD_ConnectionInfo *ci;
1610 ci = MHD_get_connection_info (connection,
1611 MHD_CONNECTION_INFO_CONNECTION_FD);
1617 sock = ci->connect_fd;
1618 for (s5r = s5r_head; NULL != s5r; s5r = s5r->next)
1620 if (GNUNET_NETWORK_get_fd (s5r->sock) == sock)
1622 if (NULL != s5r->url)
1627 s5r->url = GNUNET_strdup (url);
1628 GNUNET_SCHEDULER_cancel (s5r->timeout_task);
1629 s5r->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1638 * Kill the given MHD daemon.
1640 * @param hd daemon to stop
1643 kill_httpd (struct MhdHttpList *hd)
1645 GNUNET_CONTAINER_DLL_remove (mhd_httpd_head,
1648 GNUNET_free_non_null (hd->domain);
1649 MHD_stop_daemon (hd->daemon);
1650 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1652 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1653 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1655 GNUNET_free_non_null (hd->proxy_cert);
1663 * Task run whenever HTTP server is idle for too long. Kill it.
1665 * @param cls the `struct MhdHttpList *`
1666 * @param tc sched context
1669 kill_httpd_task (void *cls,
1670 const struct GNUNET_SCHEDULER_TaskContext *tc)
1672 struct MhdHttpList *hd = cls;
1674 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1680 * Task run whenever HTTP server operations are pending.
1682 * @param cls the `struct MhdHttpList *` of the daemon that is being run
1683 * @param tc sched context
1686 do_httpd (void *cls,
1687 const struct GNUNET_SCHEDULER_TaskContext *tc);
1691 * Schedule MHD. This function should be called initially when an
1692 * MHD is first getting its client socket, and will then automatically
1693 * always be called later whenever there is work to be done.
1695 * @param hd the daemon to schedule
1698 schedule_httpd (struct MhdHttpList *hd)
1703 struct GNUNET_NETWORK_FDSet *wrs;
1704 struct GNUNET_NETWORK_FDSet *wws;
1707 MHD_UNSIGNED_LONG_LONG timeout;
1708 struct GNUNET_TIME_Relative tv;
1714 if (MHD_YES != MHD_get_fdset (hd->daemon, &rs, &ws, &es, &max))
1719 haveto = MHD_get_timeout (hd->daemon, &timeout);
1720 if (MHD_YES == haveto)
1721 tv.rel_value_us = (uint64_t) timeout * 1000LL;
1723 tv = GNUNET_TIME_UNIT_FOREVER_REL;
1726 wrs = GNUNET_NETWORK_fdset_create ();
1727 wws = GNUNET_NETWORK_fdset_create ();
1728 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
1729 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
1736 if (GNUNET_SCHEDULER_NO_TASK != hd->httpd_task)
1737 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1738 if ( (MHD_YES != haveto) &&
1742 /* daemon is idle, kill after timeout */
1743 hd->httpd_task = GNUNET_SCHEDULER_add_delayed (MHD_CACHE_TIMEOUT,
1750 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1755 GNUNET_NETWORK_fdset_destroy (wrs);
1757 GNUNET_NETWORK_fdset_destroy (wws);
1762 * Task run whenever HTTP server operations are pending.
1764 * @param cls the `struct MhdHttpList` of the daemon that is being run
1765 * @param tc scheduler context
1768 do_httpd (void *cls,
1769 const struct GNUNET_SCHEDULER_TaskContext *tc)
1771 struct MhdHttpList *hd = cls;
1773 hd->httpd_task = GNUNET_SCHEDULER_NO_TASK;
1774 MHD_run (hd->daemon);
1775 schedule_httpd (hd);
1780 * Run MHD now, we have extra data ready for the callback.
1782 * @param hd the daemon to run now.
1785 run_mhd_now (struct MhdHttpList *hd)
1787 if (GNUNET_SCHEDULER_NO_TASK !=
1789 GNUNET_SCHEDULER_cancel (hd->httpd_task);
1790 hd->httpd_task = GNUNET_SCHEDULER_add_now (&do_httpd,
1796 * Read file in filename
1798 * @param filename file to read
1799 * @param size pointer where filesize is stored
1800 * @return NULL on error
1803 load_file (const char* filename,
1810 GNUNET_DISK_file_size (filename, &fsize,
1811 GNUNET_YES, GNUNET_YES))
1813 if (fsize > MAX_PEM_SIZE)
1815 *size = (unsigned int) fsize;
1816 buffer = GNUNET_malloc (*size);
1817 if (fsize != GNUNET_DISK_fn_read (filename, buffer, (size_t) fsize))
1819 GNUNET_free (buffer);
1827 * Load PEM key from file
1829 * @param key where to store the data
1830 * @param keyfile path to the PEM file
1831 * @return #GNUNET_OK on success
1834 load_key_from_file (gnutls_x509_privkey_t key,
1835 const char* keyfile)
1837 gnutls_datum_t key_data;
1840 key_data.data = load_file (keyfile, &key_data.size);
1841 ret = gnutls_x509_privkey_import (key, &key_data,
1842 GNUTLS_X509_FMT_PEM);
1843 if (GNUTLS_E_SUCCESS != ret)
1845 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1846 _("Unable to import private key from file `%s'\n"),
1849 GNUNET_free_non_null (key_data.data);
1850 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
1855 * Load cert from file
1857 * @param crt struct to store data in
1858 * @param certfile path to pem file
1859 * @return #GNUNET_OK on success
1862 load_cert_from_file (gnutls_x509_crt_t crt,
1863 const char* certfile)
1865 gnutls_datum_t cert_data;
1868 cert_data.data = load_file (certfile, &cert_data.size);
1869 ret = gnutls_x509_crt_import (crt, &cert_data,
1870 GNUTLS_X509_FMT_PEM);
1871 if (GNUTLS_E_SUCCESS != ret)
1873 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1874 _("Unable to import certificate %s\n"), certfile);
1876 GNUNET_free_non_null (cert_data.data);
1877 return (GNUTLS_E_SUCCESS != ret) ? GNUNET_SYSERR : GNUNET_OK;
1882 * Generate new certificate for specific name
1884 * @param name the subject name to generate a cert for
1885 * @return a struct holding the PEM data, NULL on error
1887 static struct ProxyGNSCertificate *
1888 generate_gns_certificate (const char *name)
1890 unsigned int serial;
1891 size_t key_buf_size;
1892 size_t cert_buf_size;
1893 gnutls_x509_crt_t request;
1896 struct ProxyGNSCertificate *pgc;
1898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1899 "Generating TLS/SSL certificate for `%s'\n",
1901 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_init (&request));
1902 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_set_key (request, proxy_ca.key));
1903 pgc = GNUNET_new (struct ProxyGNSCertificate);
1904 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COUNTRY_NAME,
1906 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_ORGANIZATION_NAME,
1907 0, "GNU Name System", 4);
1908 gnutls_x509_crt_set_dn_by_oid (request, GNUTLS_OID_X520_COMMON_NAME,
1909 0, name, strlen (name));
1910 GNUNET_break (GNUTLS_E_SUCCESS == gnutls_x509_crt_set_version (request, 3));
1911 gnutls_rnd (GNUTLS_RND_NONCE, &serial, sizeof (serial));
1912 gnutls_x509_crt_set_serial (request,
1915 etime = time (NULL);
1916 tm_data = localtime (&etime);
1917 gnutls_x509_crt_set_activation_time (request,
1920 etime = mktime (tm_data);
1921 gnutls_x509_crt_set_expiration_time (request,
1923 gnutls_x509_crt_sign (request,
1926 key_buf_size = sizeof (pgc->key);
1927 cert_buf_size = sizeof (pgc->cert);
1928 gnutls_x509_crt_export (request, GNUTLS_X509_FMT_PEM,
1929 pgc->cert, &cert_buf_size);
1930 gnutls_x509_privkey_export (proxy_ca.key, GNUTLS_X509_FMT_PEM,
1931 pgc->key, &key_buf_size);
1932 gnutls_x509_crt_deinit (request);
1938 * Lookup (or create) an SSL MHD instance for a particular domain.
1940 * @param domain the domain the SSL daemon has to serve
1941 * @return NULL on errro
1943 static struct MhdHttpList *
1944 lookup_ssl_httpd (const char* domain)
1946 struct MhdHttpList *hd;
1947 struct ProxyGNSCertificate *pgc;
1949 for (hd = mhd_httpd_head; NULL != hd; hd = hd->next)
1950 if ( (NULL != hd->domain) &&
1951 (0 == strcmp (hd->domain, domain)) )
1953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1954 "Starting fresh MHD HTTPS instance for domain `%s'\n",
1956 pgc = generate_gns_certificate (domain);
1957 hd = GNUNET_new (struct MhdHttpList);
1958 hd->is_ssl = GNUNET_YES;
1959 hd->domain = GNUNET_strdup (domain);
1960 hd->proxy_cert = pgc;
1961 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_SSL | MHD_USE_NO_LISTEN_SOCKET,
1964 &create_response, hd,
1965 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
1966 MHD_OPTION_NOTIFY_COMPLETED, &mhd_completed_cb, NULL,
1967 MHD_OPTION_URI_LOG_CALLBACK, &mhd_log_callback, NULL,
1968 MHD_OPTION_HTTPS_MEM_KEY, pgc->key,
1969 MHD_OPTION_HTTPS_MEM_CERT, pgc->cert,
1971 if (NULL == hd->daemon)
1977 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head,
1985 * Task run when a Socks5Request somehow fails to be associated with
1986 * an MHD connection (i.e. because the client never speaks HTTP after
1987 * the SOCKS5 handshake). Clean up.
1989 * @param cls the `struct Socks5Request *`
1990 * @param tc sched context
1993 timeout_s5r_handshake (void *cls,
1994 const struct GNUNET_SCHEDULER_TaskContext *tc)
1996 struct Socks5Request *s5r = cls;
1998 s5r->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2004 * We're done with the Socks5 protocol, now we need to pass the
2005 * connection data through to the final destination, either
2006 * direct (if the protocol might not be HTTP), or via MHD
2007 * (if the port looks like it should be HTTP).
2009 * @param s5r socks request that has reached the final stage
2012 setup_data_transfer (struct Socks5Request *s5r)
2014 struct MhdHttpList *hd;
2016 const struct sockaddr *addr;
2022 hd = lookup_ssl_httpd (s5r->domain);
2025 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2026 _("Failed to start HTTPS server for `%s'\n"),
2034 GNUNET_assert (NULL != httpd);
2038 fd = GNUNET_NETWORK_get_fd (s5r->sock);
2039 addr = GNUNET_NETWORK_get_addr (s5r->sock);
2040 len = GNUNET_NETWORK_get_addrlen (s5r->sock);
2041 s5r->state = SOCKS5_SOCKET_WITH_MHD;
2042 if (MHD_YES != MHD_add_connection (hd->daemon, fd, addr, len))
2044 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2045 _("Failed to pass client to MHD\n"));
2050 schedule_httpd (hd);
2051 s5r->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_HANDSHAKE_TIMEOUT,
2052 &timeout_s5r_handshake,
2057 /* ********************* SOCKS handling ************************* */
2061 * Write data from buffer to socks5 client, then continue with state machine.
2063 * @param cls the closure with the `struct Socks5Request`
2064 * @param tc scheduler context
2067 do_write (void *cls,
2068 const struct GNUNET_SCHEDULER_TaskContext *tc)
2070 struct Socks5Request *s5r = cls;
2073 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
2074 len = GNUNET_NETWORK_socket_send (s5r->sock,
2079 /* write error: connection closed, shutdown, etc.; just clean up */
2085 s5r->wbuf_len - len);
2086 s5r->wbuf_len -= len;
2087 if (s5r->wbuf_len > 0)
2089 /* not done writing */
2091 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2097 /* we're done writing, continue with state machine! */
2104 case SOCKS5_REQUEST:
2105 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != s5r->rtask);
2107 case SOCKS5_DATA_TRANSFER:
2108 setup_data_transfer (s5r);
2110 case SOCKS5_WRITE_THEN_CLEANUP:
2121 * Return a server response message indicating a failure to the client.
2123 * @param s5r request to return failure code for
2124 * @param sc status code to return
2127 signal_socks_failure (struct Socks5Request *s5r,
2128 enum Socks5StatusCode sc)
2130 struct Socks5ServerResponseMessage *s_resp;
2132 s_resp = (struct Socks5ServerResponseMessage *) &s5r->wbuf[s5r->wbuf_len];
2133 memset (s_resp, 0, sizeof (struct Socks5ServerResponseMessage));
2134 s_resp->version = SOCKS_VERSION_5;
2136 s5r->state = SOCKS5_WRITE_THEN_CLEANUP;
2137 if (GNUNET_SCHEDULER_NO_TASK != s5r->wtask)
2139 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2146 * Return a server response message indicating success.
2148 * @param s5r request to return success status message for
2151 signal_socks_success (struct Socks5Request *s5r)
2153 struct Socks5ServerResponseMessage *s_resp;
2155 s_resp = (struct Socks5ServerResponseMessage *) &s5r->wbuf[s5r->wbuf_len];
2156 s_resp->version = SOCKS_VERSION_5;
2157 s_resp->reply = SOCKS5_STATUS_REQUEST_GRANTED;
2158 s_resp->reserved = 0;
2159 s_resp->addr_type = SOCKS5_AT_IPV4;
2160 /* zero out IPv4 address and port */
2163 sizeof (struct in_addr) + sizeof (uint16_t));
2164 s5r->wbuf_len += sizeof (struct Socks5ServerResponseMessage) +
2165 sizeof (struct in_addr) + sizeof (uint16_t);
2166 if (GNUNET_SCHEDULER_NO_TASK == s5r->wtask)
2168 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2175 * Process GNS results for target domain.
2177 * @param cls the `struct Socks5Request`
2178 * @param rd_count number of records returned
2179 * @param rd record data
2182 handle_gns_result (void *cls,
2184 const struct GNUNET_NAMESTORE_RecordData *rd)
2186 struct Socks5Request *s5r = cls;
2188 const struct GNUNET_NAMESTORE_RecordData *r;
2191 s5r->gns_lookup = NULL;
2193 for (i=0;i<rd_count;i++)
2196 switch (r->record_type)
2198 case GNUNET_DNSPARSER_TYPE_A:
2200 struct sockaddr_in *in;
2202 if (sizeof (struct in_addr) != r->data_size)
2204 GNUNET_break_op (0);
2207 if (GNUNET_YES == got_ip)
2210 GNUNET_NETWORK_test_pf (PF_INET))
2212 got_ip = GNUNET_YES;
2213 in = (struct sockaddr_in *) &s5r->destination_address;
2214 in->sin_family = AF_INET;
2215 memcpy (&in->sin_addr,
2218 in->sin_port = htons (s5r->port);
2219 #if HAVE_SOCKADDR_IN_SIN_LEN
2220 in->sin_len = sizeof (*in);
2224 case GNUNET_DNSPARSER_TYPE_AAAA:
2226 struct sockaddr_in6 *in;
2228 if (sizeof (struct in6_addr) != r->data_size)
2230 GNUNET_break_op (0);
2233 if (GNUNET_YES == got_ip)
2236 GNUNET_NETWORK_test_pf (PF_INET))
2238 /* FIXME: allow user to disable IPv6 per configuration option... */
2239 got_ip = GNUNET_YES;
2240 in = (struct sockaddr_in6 *) &s5r->destination_address;
2241 in->sin6_family = AF_INET6;
2242 memcpy (&in->sin6_addr,
2245 in->sin6_port = htons (s5r->port);
2246 #if HAVE_SOCKADDR_IN_SIN_LEN
2247 in->sin6_len = sizeof (*in);
2251 case GNUNET_NAMESTORE_TYPE_VPN:
2252 GNUNET_break (0); /* should have been translated within GNS */
2254 case GNUNET_NAMESTORE_TYPE_LEHO:
2255 GNUNET_free_non_null (s5r->leho);
2256 s5r->leho = GNUNET_strndup (r->data,
2264 if (GNUNET_YES != got_ip)
2266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2267 "Name resolution failed to yield useful IP address.\n");
2268 signal_socks_failure (s5r,
2269 SOCKS5_STATUS_GENERAL_FAILURE);
2272 s5r->state = SOCKS5_DATA_TRANSFER;
2273 signal_socks_success (s5r);
2278 * Remove the first @a len bytes from the beginning of the read buffer.
2280 * @param s5r the handle clear the read buffer for
2281 * @param len number of bytes in read buffer to advance
2284 clear_from_s5r_rbuf (struct Socks5Request *s5r,
2287 GNUNET_assert (len <= s5r->rbuf_len);
2290 s5r->rbuf_len - len);
2291 s5r->rbuf_len -= len;
2296 * Read data from incoming Socks5 connection
2298 * @param cls the closure with the `struct Socks5Request`
2299 * @param tc the scheduler context
2302 do_s5r_read (void *cls,
2303 const struct GNUNET_SCHEDULER_TaskContext *tc)
2305 struct Socks5Request *s5r = cls;
2306 const struct Socks5ClientHelloMessage *c_hello;
2307 struct Socks5ServerHelloMessage *s_hello;
2308 const struct Socks5ClientRequestMessage *c_req;
2312 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2313 if ( (NULL != tc->read_ready) &&
2314 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) )
2316 rlen = GNUNET_NETWORK_socket_recv (s5r->sock,
2317 &s5r->rbuf[s5r->rbuf_len],
2318 sizeof (s5r->rbuf) - s5r->rbuf_len);
2321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2322 "socks5 client disconnected.\n");
2326 s5r->rbuf_len += rlen;
2328 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2332 "Processing %u bytes of socks data in state %d\n",
2338 c_hello = (const struct Socks5ClientHelloMessage*) &s5r->rbuf;
2339 if ( (s5r->rbuf_len < sizeof (struct Socks5ClientHelloMessage)) ||
2340 (s5r->rbuf_len < sizeof (struct Socks5ClientHelloMessage) + c_hello->num_auth_methods) )
2341 return; /* need more data */
2342 if (SOCKS_VERSION_5 != c_hello->version)
2344 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2345 _("Unsupported socks version %d\n"),
2346 (int) c_hello->version);
2350 clear_from_s5r_rbuf (s5r,
2351 sizeof (struct Socks5ClientHelloMessage) + c_hello->num_auth_methods);
2352 GNUNET_assert (0 == s5r->wbuf_len);
2353 s_hello = (struct Socks5ServerHelloMessage *) &s5r->wbuf;
2354 s5r->wbuf_len = sizeof (struct Socks5ServerHelloMessage);
2355 s_hello->version = SOCKS_VERSION_5;
2356 s_hello->auth_method = SOCKS_AUTH_NONE;
2357 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == s5r->wtask);
2358 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
2361 s5r->state = SOCKS5_REQUEST;
2363 case SOCKS5_REQUEST:
2364 c_req = (const struct Socks5ClientRequestMessage *) &s5r->rbuf;
2365 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage))
2367 switch (c_req->command)
2369 case SOCKS5_CMD_TCP_STREAM:
2373 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2374 _("Unsupported socks command %d\n"),
2375 (int) c_req->command);
2376 signal_socks_failure (s5r,
2377 SOCKS5_STATUS_COMMAND_NOT_SUPPORTED);
2380 switch (c_req->addr_type)
2382 case SOCKS5_AT_IPV4:
2384 const struct in_addr *v4 = (const struct in_addr *) &c_req[1];
2385 const uint16_t *port = (const uint16_t *) &v4[1];
2386 struct sockaddr_in *in;
2388 s5r->port = ntohs (*port);
2389 alen = sizeof (struct in_addr);
2390 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2391 alen + sizeof (uint16_t))
2392 return; /* need more data */
2393 in = (struct sockaddr_in *) &s5r->destination_address;
2394 in->sin_family = AF_INET;
2396 in->sin_port = *port;
2397 #if HAVE_SOCKADDR_IN_SIN_LEN
2398 in->sin_len = sizeof (*in);
2400 s5r->state = SOCKS5_DATA_TRANSFER;
2403 case SOCKS5_AT_IPV6:
2405 const struct in6_addr *v6 = (const struct in6_addr *) &c_req[1];
2406 const uint16_t *port = (const uint16_t *) &v6[1];
2407 struct sockaddr_in6 *in;
2409 s5r->port = ntohs (*port);
2410 alen = sizeof (struct in6_addr);
2411 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2412 alen + sizeof (uint16_t))
2413 return; /* need more data */
2414 in = (struct sockaddr_in6 *) &s5r->destination_address;
2415 in->sin6_family = AF_INET6;
2416 in->sin6_addr = *v6;
2417 in->sin6_port = *port;
2418 #if HAVE_SOCKADDR_IN_SIN_LEN
2419 in->sin6_len = sizeof (*in);
2421 s5r->state = SOCKS5_DATA_TRANSFER;
2424 case SOCKS5_AT_DOMAINNAME:
2426 const uint8_t *dom_len;
2427 const char *dom_name;
2428 const uint16_t *port;
2430 dom_len = (const uint8_t *) &c_req[1];
2431 alen = *dom_len + 1;
2432 if (s5r->rbuf_len < sizeof (struct Socks5ClientRequestMessage) +
2433 alen + sizeof (uint16_t))
2434 return; /* need more data */
2435 dom_name = (const char *) &dom_len[1];
2436 port = (const uint16_t*) &dom_name[*dom_len];
2437 s5r->domain = GNUNET_strndup (dom_name, *dom_len);
2438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2439 "Requested connection is to %s:%d\n",
2442 s5r->state = SOCKS5_RESOLVING;
2443 s5r->port = ntohs (*port);
2444 s5r->gns_lookup = GNUNET_GNS_lookup (gns_handle,
2447 GNUNET_DNSPARSER_TYPE_A,
2448 GNUNET_NO /* only cached */,
2449 (GNUNET_YES == do_shorten) ? &local_shorten_zone : NULL,
2455 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2456 _("Unsupported socks address type %d\n"),
2457 (int) c_req->addr_type);
2458 signal_socks_failure (s5r,
2459 SOCKS5_STATUS_ADDRESS_TYPE_NOT_SUPPORTED);
2462 clear_from_s5r_rbuf (s5r,
2463 sizeof (struct Socks5ClientRequestMessage) +
2464 alen + sizeof (uint16_t));
2465 if (0 != s5r->rbuf_len)
2467 /* read more bytes than healthy, why did the client send more!? */
2468 GNUNET_break_op (0);
2469 signal_socks_failure (s5r,
2470 SOCKS5_STATUS_GENERAL_FAILURE);
2473 if (SOCKS5_DATA_TRANSFER == s5r->state)
2475 /* if we are not waiting for GNS resolution, signal success */
2476 signal_socks_success (s5r);
2478 /* We are done reading right now */
2479 GNUNET_SCHEDULER_cancel (s5r->rtask);
2480 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
2482 case SOCKS5_RESOLVING:
2485 case SOCKS5_DATA_TRANSFER:
2496 * Accept new incoming connections
2498 * @param cls the closure
2499 * @param tc the scheduler context
2502 do_accept (void *cls,
2503 const struct GNUNET_SCHEDULER_TaskContext *tc)
2505 struct GNUNET_NETWORK_Handle *s;
2506 struct Socks5Request *s5r;
2508 ltask = GNUNET_SCHEDULER_NO_TASK;
2509 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2511 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2514 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
2517 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "accept");
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2521 "Got an inbound connection, waiting for data\n");
2522 s5r = GNUNET_new (struct Socks5Request);
2523 GNUNET_CONTAINER_DLL_insert (s5r_head,
2527 s5r->state = SOCKS5_INIT;
2528 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2534 /* ******************* General / main code ********************* */
2538 * Task run on shutdown
2540 * @param cls closure
2541 * @param tc task context
2544 do_shutdown (void *cls,
2545 const struct GNUNET_SCHEDULER_TaskContext *tc)
2547 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2548 "Shutting down...\n");
2549 while (NULL != mhd_httpd_head)
2550 kill_httpd (mhd_httpd_head);
2551 while (NULL != s5r_head)
2552 cleanup_s5r (s5r_head);
2555 GNUNET_NETWORK_socket_close (lsock);
2560 GNUNET_IDENTITY_cancel (id_op);
2563 if (NULL != identity)
2565 GNUNET_IDENTITY_disconnect (identity);
2568 if (NULL != curl_multi)
2570 curl_multi_cleanup (curl_multi);
2573 if (NULL != gns_handle)
2575 GNUNET_GNS_disconnect (gns_handle);
2578 if (GNUNET_SCHEDULER_NO_TASK != curl_download_task)
2580 GNUNET_SCHEDULER_cancel (curl_download_task);
2581 curl_download_task = GNUNET_SCHEDULER_NO_TASK;
2583 if (GNUNET_SCHEDULER_NO_TASK != ltask)
2585 GNUNET_SCHEDULER_cancel (ltask);
2586 ltask = GNUNET_SCHEDULER_NO_TASK;
2588 gnutls_x509_crt_deinit (proxy_ca.cert);
2589 gnutls_x509_privkey_deinit (proxy_ca.key);
2590 gnutls_global_deinit ();
2595 * Create an IPv4 listen socket bound to our port.
2597 * @return NULL on error
2599 static struct GNUNET_NETWORK_Handle *
2602 struct GNUNET_NETWORK_Handle *ls;
2603 struct sockaddr_in sa4;
2606 memset (&sa4, 0, sizeof (sa4));
2607 sa4.sin_family = AF_INET;
2608 sa4.sin_port = htons (port);
2609 #if HAVE_SOCKADDR_IN_SIN_LEN
2610 sa4.sin_len = sizeof (sa4);
2612 ls = GNUNET_NETWORK_socket_create (AF_INET,
2618 GNUNET_NETWORK_socket_bind (ls, (const struct sockaddr *) &sa4,
2622 GNUNET_NETWORK_socket_close (ls);
2631 * Create an IPv6 listen socket bound to our port.
2633 * @return NULL on error
2635 static struct GNUNET_NETWORK_Handle *
2638 struct GNUNET_NETWORK_Handle *ls;
2639 struct sockaddr_in6 sa6;
2642 memset (&sa6, 0, sizeof (sa6));
2643 sa6.sin6_family = AF_INET6;
2644 sa6.sin6_port = htons (port);
2645 #if HAVE_SOCKADDR_IN_SIN_LEN
2646 sa6.sin6_len = sizeof (sa6);
2648 ls = GNUNET_NETWORK_socket_create (AF_INET6,
2654 GNUNET_NETWORK_socket_bind (ls, (const struct sockaddr *) &sa6,
2658 GNUNET_NETWORK_socket_close (ls);
2667 * Continue initialization after we have our zone information.
2672 struct MhdHttpList *hd;
2674 /* Open listen socket for socks proxy */
2680 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "bind");
2681 GNUNET_SCHEDULER_shutdown ();
2684 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
2686 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "listen");
2687 GNUNET_SCHEDULER_shutdown ();
2690 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
2691 lsock, &do_accept, NULL);
2693 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
2695 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2696 "cURL global init failed!\n");
2697 GNUNET_SCHEDULER_shutdown ();
2700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2701 "Proxy listens on port %u\n",
2704 /* start MHD daemon for HTTP */
2705 hd = GNUNET_new (struct MhdHttpList);
2706 hd->daemon = MHD_start_daemon (MHD_USE_DEBUG | MHD_USE_NO_LISTEN_SOCKET,
2709 &create_response, hd,
2710 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
2711 MHD_OPTION_NOTIFY_COMPLETED, &mhd_completed_cb, NULL,
2712 MHD_OPTION_URI_LOG_CALLBACK, &mhd_log_callback, NULL,
2714 if (NULL == hd->daemon)
2717 GNUNET_SCHEDULER_shutdown ();
2721 GNUNET_CONTAINER_DLL_insert (mhd_httpd_head, mhd_httpd_tail, hd);
2726 * Method called to inform about the egos of the shorten zone of this peer.
2728 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
2729 * this function is only called ONCE, and 'NULL' being passed in
2730 * @a ego does indicate an error (i.e. name is taken or no default
2731 * value is known). If @a ego is non-NULL and if '*ctx'
2732 * is set in those callbacks, the value WILL be passed to a subsequent
2733 * call to the identity callback of #GNUNET_IDENTITY_connect (if
2734 * that one was not NULL).
2736 * @param cls closure, NULL
2737 * @param ego ego handle
2738 * @param ctx context for application to store data for this ego
2739 * (during the lifetime of this process, initially NULL)
2740 * @param name name assigned by the user for this ego,
2741 * NULL if the user just deleted the ego and it
2742 * must thus no longer be used
2745 identity_shorten_cb (void *cls,
2746 struct GNUNET_IDENTITY_Ego *ego,
2753 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2754 _("No ego configured for `shorten-zone`\n"));
2758 local_shorten_zone = *GNUNET_IDENTITY_ego_get_private_key (ego);
2759 do_shorten = GNUNET_YES;
2766 * Method called to inform about the egos of the master zone of this peer.
2768 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
2769 * this function is only called ONCE, and 'NULL' being passed in
2770 * @a ego does indicate an error (i.e. name is taken or no default
2771 * value is known). If @a ego is non-NULL and if '*ctx'
2772 * is set in those callbacks, the value WILL be passed to a subsequent
2773 * call to the identity callback of #GNUNET_IDENTITY_connect (if
2774 * that one was not NULL).
2776 * @param cls closure, NULL
2777 * @param ego ego handle
2778 * @param ctx context for application to store data for this ego
2779 * (during the lifetime of this process, initially NULL)
2780 * @param name name assigned by the user for this ego,
2781 * NULL if the user just deleted the ego and it
2782 * must thus no longer be used
2785 identity_master_cb (void *cls,
2786 struct GNUNET_IDENTITY_Ego *ego,
2793 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2794 _("No ego configured for `%s`\n"),
2796 GNUNET_SCHEDULER_shutdown ();
2799 GNUNET_IDENTITY_ego_get_public_key (ego,
2801 id_op = GNUNET_IDENTITY_get (identity,
2803 &identity_shorten_cb,
2809 * Main function that will be run
2811 * @param cls closure
2812 * @param args remaining command-line arguments
2813 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
2814 * @param c configuration
2817 run (void *cls, char *const *args, const char *cfgfile,
2818 const struct GNUNET_CONFIGURATION_Handle *c)
2820 char* cafile_cfg = NULL;
2824 if (NULL == (curl_multi = curl_multi_init ()))
2826 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2827 "Failed to create cURL multi handle!\n");
2830 cafile = cafile_opt;
2833 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns-proxy",
2837 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2842 cafile = cafile_cfg;
2844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2845 "Using %s as CA\n", cafile);
2847 gnutls_global_init ();
2848 gnutls_x509_crt_init (&proxy_ca.cert);
2849 gnutls_x509_privkey_init (&proxy_ca.key);
2851 if ( (GNUNET_OK != load_cert_from_file (proxy_ca.cert, cafile)) ||
2852 (GNUNET_OK != load_key_from_file (proxy_ca.key, cafile)) )
2854 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2855 _("Failed to load SSL/TLS key and certificate from `%s'\n"),
2857 gnutls_x509_crt_deinit (proxy_ca.cert);
2858 gnutls_x509_privkey_deinit (proxy_ca.key);
2859 gnutls_global_deinit ();
2860 GNUNET_free_non_null (cafile_cfg);
2863 GNUNET_free_non_null (cafile_cfg);
2864 if (NULL == (gns_handle = GNUNET_GNS_connect (cfg)))
2866 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2867 "Unable to connect to GNS!\n");
2868 gnutls_x509_crt_deinit (proxy_ca.cert);
2869 gnutls_x509_privkey_deinit (proxy_ca.key);
2870 gnutls_global_deinit ();
2873 identity = GNUNET_IDENTITY_connect (cfg,
2875 id_op = GNUNET_IDENTITY_get (identity,
2877 &identity_master_cb,
2879 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2880 &do_shutdown, NULL);
2885 * The main function for gnunet-gns-proxy.
2887 * @param argc number of arguments from the command line
2888 * @param argv command line arguments
2889 * @return 0 ok, 1 on error
2892 main (int argc, char *const *argv)
2894 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
2896 gettext_noop ("listen on specified port (default: 7777)"), 1,
2897 &GNUNET_GETOPT_set_ulong, &port},
2898 {'a', "authority", NULL,
2899 gettext_noop ("pem file to use as CA"), 1,
2900 &GNUNET_GETOPT_set_string, &cafile_opt},
2901 GNUNET_GETOPT_OPTION_END
2903 static const char* page =
2904 "<html><head><title>gnunet-gns-proxy</title>"
2905 "</head><body>cURL fail</body></html>";
2908 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
2910 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
2911 curl_failure_response = MHD_create_response_from_buffer (strlen (page),
2913 MHD_RESPMEM_PERSISTENT);
2917 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
2918 _("GNUnet GNS proxy"),
2920 &run, NULL)) ? 0 : 1;
2921 MHD_destroy_response (curl_failure_response);
2922 GNUNET_free_non_null ((char *) argv);
2923 GNUNET_CRYPTO_ecdsa_key_clear (&local_shorten_zone);
2927 /* end of gnunet-gns-proxy.c */