2 This file is part of GNUnet
3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_http.c
23 * @brief http transport service plugin
24 * @author Matthias Wachs
27 #include "plugin_transport_http.h"
30 * After how long do we expire an address that we
31 * learned from another peer if it is not reconfirmed
34 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
37 * Wrapper to manage IPv4 addresses
39 struct IPv4HttpAddressWrapper
44 struct IPv4HttpAddressWrapper *next;
47 * Linked list previous
49 struct IPv4HttpAddressWrapper *prev;
51 struct IPv4HttpAddress addr;
55 * Wrapper for IPv4 addresses.
57 struct IPv6HttpAddressWrapper
62 struct IPv6HttpAddressWrapper *next;
65 * Linked list previous
67 struct IPv6HttpAddressWrapper *prev;
69 struct IPv6HttpAddress addr6;
74 * Context for address to string conversion.
76 struct PrettyPrinterContext
79 * Function to call with the result.
81 GNUNET_TRANSPORT_AddressStringCallback asc;
86 struct Plugin *plugin;
94 * Port to add after the IP address.
105 * Encapsulation of all of the state of the plugin.
112 * Append our port and forward the result.
114 * @param cls the 'struct PrettyPrinterContext*'
115 * @param hostname hostname part of the address
118 append_port (void *cls, const char *hostname)
120 struct PrettyPrinterContext *ppc = cls;
121 static char rbuf[INET6_ADDRSTRLEN + 13];
123 if (hostname == NULL)
125 ppc->asc (ppc->asc_cls, NULL);
131 const char *protocol = "http";
133 const char *protocol = "https";
135 GNUNET_assert ((strlen (hostname) + 7) < (INET6_ADDRSTRLEN + 13));
136 if (ppc->addrlen == sizeof (struct IPv6HttpAddress))
138 if (ppc->numeric == GNUNET_YES)
139 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol, hostname, ppc->port);
142 if (strchr(hostname, ':') != NULL)
143 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol, hostname, ppc->port);
145 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, hostname, ppc->port);
148 else if (ppc->addrlen == sizeof (struct IPv4HttpAddress))
149 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, hostname, ppc->port);
150 ppc->asc (ppc->asc_cls, rbuf);
158 * Convert the transports address to a nice, human-readable
162 * @param type name of the transport that generated the address
163 * @param addr one of the addresses of the host, NULL for the last address
164 * the specific address format depends on the transport
165 * @param addrlen length of the address
166 * @param numeric should (IP) addresses be displayed in numeric form?
167 * @param timeout after how long should we give up?
168 * @param asc function to call on each string
169 * @param asc_cls closure for asc
172 http_plugin_address_pretty_printer (void *cls, const char *type,
173 const void *addr, size_t addrlen,
175 struct GNUNET_TIME_Relative timeout,
176 GNUNET_TRANSPORT_AddressStringCallback asc,
179 GNUNET_assert (cls != NULL);
180 struct PrettyPrinterContext *ppc;
182 struct sockaddr_in s4;
183 struct sockaddr_in6 s6;
187 if ((addrlen == sizeof (struct IPv6HttpAddress)) && (addr != NULL))
189 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
190 s6.sin6_family = AF_INET6;
191 s6.sin6_addr = a6->ipv6_addr;
192 s6.sin6_port = a6->u6_port;
193 #if HAVE_SOCKADDR_IN_SIN_LEN
194 s6.sin6_len = sizeof (struct sockaddr_in6);
197 sbs = sizeof (struct sockaddr_in6);
198 port = ntohs (a6->u6_port);
201 else if ((addrlen == sizeof (struct IPv4HttpAddress)) && (addr != NULL))
203 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
205 s4.sin_family = AF_INET;
206 s4.sin_addr.s_addr = a4->ipv4_addr;
207 s4.sin_port = a4->u4_port;
208 #if HAVE_SOCKADDR_IN_SIN_LEN
209 s4.sin_len = sizeof (struct sockaddr_in);
212 sbs = sizeof (struct sockaddr_in);
213 port = ntohs (a4->u4_port);
215 else if (0 == addrlen)
217 asc (asc_cls, "<inbound connection>");
223 /* invalid address */
228 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
230 ppc->asc_cls = asc_cls;
233 ppc->addrlen = addrlen;
234 ppc->numeric = numeric;
235 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
241 * Another peer has suggested an address for this
242 * peer and transport plugin. Check that this could be a valid
243 * address. If so, consider adding it to the list
247 * @param addr pointer to the address
248 * @param addrlen length of addr
249 * @return GNUNET_OK if this is a plausible address for this peer
253 http_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
256 struct Plugin *plugin = cls;
257 struct IPv4HttpAddressWrapper *w_tv4 = plugin->ipv4_addr_head;
258 struct IPv6HttpAddressWrapper *w_tv6 = plugin->ipv6_addr_head;
262 GNUNET_assert (cls != NULL);
263 if ((addrlen != sizeof (struct sockaddr_in)) ||
264 (addrlen != sizeof (struct sockaddr_in6)))
265 return GNUNET_SYSERR;
267 if (addrlen == sizeof (struct IPv4HttpAddress))
269 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
271 while (w_tv4 != NULL)
274 memcmp (&w_tv4->addr.ipv4_addr, &a4->ipv4_addr,
275 sizeof (struct in_addr))) &&
276 (w_tv4->addr.u4_port == a4->u4_port))
283 return GNUNET_SYSERR;
285 if (addrlen == sizeof (struct sockaddr_in6))
287 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
289 while (w_tv6 != NULL)
292 memcmp (&w_tv6->addr6.ipv6_addr, &a6->ipv6_addr,
293 sizeof (struct in6_addr))) &&
294 (w_tv6->addr6.u6_port == a6->u6_port))
301 return GNUNET_SYSERR;
306 struct GNUNET_TIME_Relative
307 http_plugin_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
308 const struct GNUNET_MessageHeader *message,
309 struct Session *session, const char *sender_address,
310 uint16_t sender_address_len)
312 struct Session *s = cls;
313 struct Plugin *plugin = s->plugin;
314 struct GNUNET_TIME_Relative delay;
315 struct GNUNET_ATS_Information atsi[2];
317 atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
318 atsi[0].value = htonl (1);
319 atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
320 atsi[1].value = session->ats_address_network_type;
321 GNUNET_break (session->ats_address_network_type != ntohl (GNUNET_ATS_NET_UNSPECIFIED));
324 plugin->env->receive (plugin->env->cls, &s->target, message,
325 (const struct GNUNET_ATS_Information *) &atsi,
326 2, s, s->addr, s->addrlen);
332 * Function called to convert a string address to
335 * @param cls closure ('struct Plugin*')
336 * @param addr string address
337 * @param addrlen length of the address
338 * @param buf location to store the buffer
339 * If the function returns GNUNET_SYSERR, its contents are undefined.
340 * @param added length of created address
341 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
343 int http_string_to_address (void *cls,
350 char *protocol = "http";
352 char *protocol = "https";
354 char *addr_str = NULL;
355 struct sockaddr_in addr_4;
356 struct sockaddr_in6 addr_6;
357 struct IPv4HttpAddress * http_4addr;
358 struct IPv6HttpAddress * http_6addr;
360 if ((NULL == addr) || (addrlen == 0))
363 return GNUNET_SYSERR;
366 if ('\0' != addr[addrlen - 1])
369 return GNUNET_SYSERR;
372 if (strlen (addr) != addrlen - 1)
375 return GNUNET_SYSERR;
378 /* protocoll + "://" + ":" */
379 if (addrlen <= (strlen (protocol) + 4))
381 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
382 "Invalid address string `%s' to convert to address\n",
385 return GNUNET_SYSERR;
388 if (NULL == (addr_str = strstr(addr, "://")))
390 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
391 "Invalid address string `%s' to convert to address\n",
394 return GNUNET_SYSERR;
396 addr_str = &addr_str[3];
398 if (addr_str[strlen(addr_str)-1] == '/')
399 addr_str[strlen(addr_str)-1] = '\0';
401 if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv4(addr_str, strlen(addr_str), &addr_4))
403 http_4addr = GNUNET_malloc (sizeof (struct IPv4HttpAddress));
404 http_4addr->u4_port = addr_4.sin_port;
405 http_4addr->ipv4_addr = (uint32_t) addr_4.sin_addr.s_addr;
407 (*added) = sizeof (struct IPv4HttpAddress);
410 else if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv6(addr_str, strlen(addr_str), &addr_6))
412 http_6addr = GNUNET_malloc (sizeof (struct IPv6HttpAddress));
413 http_6addr->u6_port = addr_6.sin6_port;
414 http_6addr->ipv6_addr = addr_6.sin6_addr;
416 (*added) = sizeof (struct IPv6HttpAddress);
421 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
422 "Invalid address string `%s' to convert to address\n",
425 return GNUNET_SYSERR;
432 * Function called for a quick conversion of the binary address to
433 * a numeric address. Note that the caller must not free the
434 * address and that the next call to this function is allowed
435 * to override the address again.
438 * @param addr binary address
439 * @param addrlen length of the address
440 * @return string representing the same address
443 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
446 struct IPv4HttpAddress *a4;
447 struct IPv6HttpAddress *a6;
449 static char rbuf[INET6_ADDRSTRLEN + 13];
453 if (addrlen == sizeof (struct IPv6HttpAddress))
455 a6 = (struct IPv6HttpAddress *) addr;
456 address = GNUNET_malloc (INET6_ADDRSTRLEN);
457 GNUNET_assert (NULL !=
458 inet_ntop (AF_INET6, &a6->ipv6_addr, address,
460 port = ntohs (a6->u6_port);
462 else if (addrlen == sizeof (struct IPv4HttpAddress))
464 a4 = (struct IPv4HttpAddress *) addr;
465 address = GNUNET_malloc (INET_ADDRSTRLEN);
466 GNUNET_assert (NULL !=
467 inet_ntop (AF_INET, &(a4->ipv4_addr), address,
469 port = ntohs (a4->u4_port);
473 /* invalid address */
478 char *protocol = "http";
480 char *protocol = "https";
483 GNUNET_assert (strlen (address) + 7 < (INET6_ADDRSTRLEN + 13));
484 if (addrlen == sizeof (struct IPv6HttpAddress))
486 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol,
488 else if (addrlen == sizeof (struct IPv4HttpAddress))
490 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, address,
493 GNUNET_free (address);
494 GNUNET_assert (res != 0);
499 lookup_session_old (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
500 struct Session *session, const void *addr, size_t addrlen,
507 for (t = plugin->head; NULL != t; t = t->next)
510 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
511 "Comparing peer `%s' address `%s' len %i session %X to \n",
512 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
514 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
515 "peer `%s' address `%s' len %i session %X \n\n",
516 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
518 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
519 memcmp (addr, t->addr, addrlen));
523 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
526 if ( (addrlen == t->addrlen) &&
527 (0 == memcmp (addr, t->addr, addrlen)) )
529 if ( (t == session) &&
530 (t->addrlen == session->addrlen) &&
531 (0 == memcmp (session->addr, t->addr, t->addrlen)) )
535 if ( ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO)) ||
536 ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) && (e_addr == GNUNET_YES)) ||
537 ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR)) )
544 lookup_session (struct Plugin *plugin,
545 const struct GNUNET_HELLO_Address *address)
549 for (pos = plugin->head; NULL != pos; pos = pos->next)
550 if ( (0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
551 (address->address_length == pos->addrlen) &&
552 (0 == memcmp (address->address, pos->addr, pos->addrlen)) )
558 exist_session (struct Plugin *plugin, struct Session *s)
560 struct Session * head;
562 GNUNET_assert (NULL != plugin);
563 GNUNET_assert (NULL != s);
565 for (head = plugin->head; head != NULL; head = head->next)
576 delete_session (struct Session *s)
578 if (s->msg_tk != NULL)
580 GNUNET_SERVER_mst_destroy (s->msg_tk);
583 GNUNET_free (s->addr);
584 GNUNET_free_non_null (s->server_recv);
585 GNUNET_free_non_null (s->server_send);
590 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
591 const void *addr, size_t addrlen,
592 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
594 struct Session *s = NULL;
596 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
597 (addrlen == sizeof (struct IPv4HttpAddress)));
598 s = GNUNET_malloc (sizeof (struct Session));
599 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
601 s->addr = GNUNET_malloc (addrlen);
602 memcpy (s->addr, addr, addrlen);
603 s->addrlen = addrlen;
605 s->next_receive = GNUNET_TIME_absolute_get_zero ();
606 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
611 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
614 struct Plugin *plugin = cls;
616 plugin->env->session_end (plugin->env->cls, peer, s);
617 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
622 * Creates a new outbound session the transport service will use to send data to the
625 * @param cls the plugin
626 * @param address the address
627 * @return the session or NULL of max connections exceeded
630 static struct Session *
631 http_get_session (void *cls,
632 const struct GNUNET_HELLO_Address *address)
634 struct Plugin *plugin = cls;
635 struct Session * s = NULL;
636 struct GNUNET_ATS_Information ats;
639 GNUNET_assert (plugin != NULL);
640 GNUNET_assert (address != NULL);
641 GNUNET_assert (address->address != NULL);
643 ats.type = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
644 ats.value = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
646 /* find existing session */
647 s = lookup_session (plugin, address);
651 if (plugin->max_connections <= plugin->cur_connections)
653 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
654 "Maximum number of connections reached, "
655 "cannot connect to peer `%s'\n", GNUNET_i2s (&address->peer));
659 /* create new session */
660 addrlen = address->address_length;
662 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
663 (addrlen == sizeof (struct IPv4HttpAddress)));
665 s = GNUNET_malloc (sizeof (struct Session));
666 memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
668 s->addr = GNUNET_malloc (address->address_length);
669 memcpy (s->addr, address->address, address->address_length);
670 s->addrlen = addrlen;
672 s->next_receive = GNUNET_TIME_absolute_get_zero ();
673 s->inbound = GNUNET_NO;
674 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
677 if (addrlen == sizeof (struct IPv4HttpAddress))
679 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) address->address;
680 struct sockaddr_in s4;
682 s4.sin_family = AF_INET;
683 s4.sin_addr.s_addr = a4->ipv4_addr;
684 s4.sin_port = a4->u4_port;
685 #if HAVE_SOCKADDR_IN_SIN_LEN
686 s4.sin_len = sizeof (struct sockaddr_in);
688 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
690 if (addrlen == sizeof (struct IPv6HttpAddress))
692 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) address->address;
693 struct sockaddr_in6 s6;
695 s6.sin6_family = AF_INET6;
696 s6.sin6_addr = a6->ipv6_addr;
697 s6.sin6_port = a6->u6_port;
698 #if HAVE_SOCKADDR_IN_SIN_LEN
699 s6.sin6_len = sizeof (struct sockaddr_in6);
701 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
703 s->ats_address_network_type = ats.value;
705 /* add new session */
706 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
707 /* initiate new connection */
708 if (GNUNET_SYSERR == client_connect (s))
710 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
711 "Cannot connect to peer `%s' address `%s''\n",
712 http_plugin_address_to_string(NULL, s->addr, s->addrlen),
713 GNUNET_i2s (&s->target));
714 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
723 * Function that can be used by the transport service to transmit
724 * a message using the plugin. Note that in the case of a
725 * peer disconnecting, the continuation MUST be called
726 * prior to the disconnect notification itself. This function
727 * will be called with this peer's HELLO message to initiate
728 * a fresh connection to another peer.
731 * @param session which session must be used
732 * @param msgbuf the message to transmit
733 * @param msgbuf_size number of bytes in 'msgbuf'
734 * @param priority how important is the message (most plugins will
735 * ignore message priority and just FIFO)
736 * @param to how long to wait at most for the transmission (does not
737 * require plugins to discard the message after the timeout,
738 * just advisory for the desired delay; most plugins will ignore
740 * @param cont continuation to call once the message has
741 * been transmitted (or if the transport is ready
742 * for the next transmission call; or if the
743 * peer disconnected...); can be NULL
744 * @param cont_cls closure for cont
745 * @return number of bytes used (on the physical network, with overheads);
746 * -1 on hard errors (i.e. address invalid); 0 is a legal value
747 * and does NOT mean that the message was not transmitted (DV)
750 http_plugin_send (void *cls,
751 struct Session *session,
752 const char *msgbuf, size_t msgbuf_size,
753 unsigned int priority,
754 struct GNUNET_TIME_Relative to,
755 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
757 struct Plugin *plugin = cls;
758 struct HTTP_Message *msg;
762 GNUNET_assert (plugin != NULL);
763 GNUNET_assert (session != NULL);
765 /* lookup if session is really existing */
769 if ((tmp == session) &&
770 (0 == memcmp (&session->target, &tmp->target, sizeof (struct GNUNET_PeerIdentity))) &&
771 (session->addrlen == tmp->addrlen) &&
772 (0 == memcmp (session->addr, tmp->addr, tmp->addrlen)))
782 /* create new message and schedule */
784 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
786 msg->size = msgbuf_size;
788 msg->buf = (char *) &msg[1];
789 msg->transmit_cont = cont;
790 msg->transmit_cont_cls = cont_cls;
791 memcpy (msg->buf, msgbuf, msgbuf_size);
793 if (session->inbound == GNUNET_NO)
795 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
796 "Using outbound client session %p to send to `%s'\n", session,
797 GNUNET_i2s (&session->target));
798 client_send (session, msg);
801 if (session->inbound == GNUNET_YES)
803 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
804 "Using inbound server %p session to send to `%s'\n", session,
805 GNUNET_i2s (&session->target));
806 server_send (session, msg);
815 * Function that can be used to force the plugin to disconnect
816 * from the given peer and cancel all previous transmissions
817 * (and their continuationc).
820 * @param target peer from which to disconnect
823 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
825 struct Plugin *plugin = cls;
826 struct Session *next = NULL;
827 struct Session *s = plugin->head;
829 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
830 "Transport tells me to disconnect `%s'\n",
831 GNUNET_i2s (target));
835 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
837 if (s->inbound == GNUNET_NO)
838 GNUNET_assert (GNUNET_OK == client_disconnect (s));
840 GNUNET_assert (GNUNET_OK == server_disconnect (s));
841 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
843 struct HTTP_Message *msg = s->msg_head;
844 struct HTTP_Message *tmp = NULL;
850 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
851 if (msg->transmit_cont != NULL)
853 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
866 find_address (struct Plugin *plugin, const struct sockaddr *addr, socklen_t addrlen)
869 struct IPv4HttpAddressWrapper *w_t4 = NULL;
870 struct IPv6HttpAddressWrapper *w_t6 = NULL;
872 af = addr->sa_family;
876 w_t4 = plugin->ipv4_addr_head;
877 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
881 int res = memcmp (&w_t4->addr.ipv4_addr,
883 sizeof (struct in_addr));
887 if (a4->sin_port != w_t4->addr.u4_port)
898 w_t6 = plugin->ipv6_addr_head;
899 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
903 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
904 sizeof (struct in6_addr));
908 if (a6->sin6_port != w_t6->addr6.u6_port)
924 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
927 struct Plugin *plugin = cls;
928 struct IPv4HttpAddressWrapper *w_t4 = NULL;
929 struct IPv6HttpAddressWrapper *w_t6 = NULL;
932 af = addr->sa_family;
936 w_t4 = find_address (plugin, addr, addrlen);
939 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
940 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
941 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
942 w_t4->addr.u4_port = a4->sin_port;
944 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
945 plugin->ipv4_addr_tail, w_t4);
947 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
948 "Notifying transport to add IPv4 address `%s'\n",
949 http_plugin_address_to_string (NULL, &w_t4->addr,
952 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
953 sizeof (struct IPv4HttpAddress));
957 w_t6 = find_address (plugin, addr, addrlen);
960 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
961 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
962 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
963 w_t6->addr6.u6_port = a6->sin6_port;
965 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
966 plugin->ipv6_addr_tail, w_t6);
968 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
969 "Notifying transport to add IPv6 address `%s'\n",
970 http_plugin_address_to_string (NULL, &w_t6->addr6,
973 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
974 sizeof (struct IPv6HttpAddress));
984 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
987 struct Plugin *plugin = cls;
988 struct IPv4HttpAddressWrapper *w_t4 = NULL;
989 struct IPv6HttpAddressWrapper *w_t6 = NULL;
992 af = addr->sa_family;
996 w_t4 = find_address (plugin, addr, addrlen);
1001 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1002 "Notifying transport to remove IPv4 address `%s'\n",
1003 http_plugin_address_to_string (NULL, &w_t4->addr,
1006 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
1007 sizeof (struct IPv4HttpAddress));
1009 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1014 w_t6 = find_address (plugin, addr, addrlen);
1018 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1019 "Notifying transport to remove IPv6 address `%s'\n",
1020 http_plugin_address_to_string (NULL, &w_t6->addr6,
1024 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
1025 sizeof (struct IPv6HttpAddress));
1027 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1038 * Our external IP address/port mapping has changed.
1040 * @param cls closure, the 'struct LocalAddrList'
1041 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1042 * the previous (now invalid) one
1043 * @param addr either the previous or the new public IP address
1044 * @param addrlen actual lenght of the address
1047 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
1050 GNUNET_assert (cls != NULL);
1051 struct Plugin *plugin = cls;
1053 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1054 "NPMC called %s to address `%s'\n",
1055 (add_remove == GNUNET_NO) ? "remove" : "add",
1056 GNUNET_a2s (addr, addrlen));
1061 nat_add_address (cls, add_remove, addr, addrlen);
1064 nat_remove_address (cls, add_remove, addr, addrlen);
1070 http_check_ipv6 (struct Plugin *plugin)
1072 struct GNUNET_NETWORK_Handle *desc = NULL;
1074 if (plugin->ipv6 == GNUNET_YES)
1076 /* probe IPv6 support */
1077 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
1080 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
1083 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1085 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
1087 ("Disabling IPv6 since it is not supported on this system!\n"));
1088 plugin->ipv6 = GNUNET_NO;
1092 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
1096 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1097 "Testing IPv6 on this system: %s\n",
1098 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
1103 http_get_addresses (struct Plugin *plugin, const char *serviceName,
1104 const struct GNUNET_CONFIGURATION_Handle *cfg,
1105 struct sockaddr ***addrs, socklen_t ** addr_lens)
1108 unsigned long long port;
1109 struct addrinfo hints;
1110 struct addrinfo *res;
1111 struct addrinfo *pos;
1112 struct addrinfo *next;
1116 struct sockaddr **saddrs;
1117 socklen_t *saddrlens;
1123 disablev6 = !plugin->ipv6;
1126 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
1128 GNUNET_break (GNUNET_OK ==
1129 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
1133 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1135 ("Require valid port number for service in configuration!\n"));
1136 return GNUNET_SYSERR;
1140 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1142 GNUNET_break (GNUNET_OK ==
1143 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1144 "BINDTO", &hostname));
1149 if (hostname != NULL)
1151 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1152 "Resolving `%s' since that is where `%s' will bind to.\n",
1153 hostname, serviceName);
1154 memset (&hints, 0, sizeof (struct addrinfo));
1156 hints.ai_family = AF_INET;
1157 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1160 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1161 hostname, gai_strerror (ret));
1162 GNUNET_free (hostname);
1163 return GNUNET_SYSERR;
1167 while (NULL != (pos = next))
1169 next = pos->ai_next;
1170 if ((disablev6) && (pos->ai_family == AF_INET6))
1176 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1177 _("Failed to find %saddress for `%s'.\n"),
1178 disablev6 ? "IPv4 " : "", hostname);
1180 GNUNET_free (hostname);
1181 return GNUNET_SYSERR;
1184 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1185 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1188 while (NULL != (pos = next))
1190 next = pos->ai_next;
1191 if ((disablev6) && (pos->ai_family == AF_INET6))
1193 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1194 continue; /* not TCP */
1195 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1196 continue; /* huh? */
1197 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1198 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1200 if (pos->ai_family == AF_INET)
1202 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1203 saddrlens[i] = pos->ai_addrlen;
1204 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1205 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1206 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1210 GNUNET_assert (pos->ai_family == AF_INET6);
1211 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1212 saddrlens[i] = pos->ai_addrlen;
1213 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1214 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1215 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1219 GNUNET_free (hostname);
1225 /* will bind against everything, just set port */
1231 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1232 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1234 saddrlens[i] = sizeof (struct sockaddr_in);
1235 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1236 #if HAVE_SOCKADDR_IN_SIN_LEN
1237 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1239 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1240 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1246 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1247 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1249 saddrlens[i] = sizeof (struct sockaddr_in6);
1250 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1251 #if HAVE_SOCKADDR_IN_SIN_LEN
1252 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1254 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1255 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1257 saddrlens[i] = sizeof (struct sockaddr_in);
1258 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1259 #if HAVE_SOCKADDR_IN_SIN_LEN
1260 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1262 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1263 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1267 *addr_lens = saddrlens;
1272 start_report_addresses (struct Plugin *plugin)
1274 int res = GNUNET_OK;
1275 struct sockaddr **addrs;
1276 socklen_t *addrlens;
1279 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1281 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1282 _("Found %u addresses to report to NAT service\n"), res);
1284 if (res != GNUNET_SYSERR)
1287 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1289 (const struct sockaddr **) addrs, addrlens,
1290 &nat_port_map_callback, NULL, plugin);
1295 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1296 GNUNET_a2s (addrs[res], addrlens[res]));
1298 GNUNET_assert (addrs[res] != NULL);
1299 GNUNET_free (addrs[res]);
1301 GNUNET_free_non_null (addrs);
1302 GNUNET_free_non_null (addrlens);
1307 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1308 NULL, NULL, plugin);
1313 stop_report_addresses (struct Plugin *plugin)
1315 /* Stop NAT handle */
1316 GNUNET_NAT_unregister (plugin->nat);
1318 /* Clean up addresses */
1319 struct IPv4HttpAddressWrapper *w_t4;
1320 struct IPv6HttpAddressWrapper *w_t6;
1322 while (plugin->ipv4_addr_head != NULL)
1324 w_t4 = plugin->ipv4_addr_head;
1325 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1330 while (plugin->ipv6_addr_head != NULL)
1332 w_t6 = plugin->ipv6_addr_head;
1333 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1340 configure_plugin (struct Plugin *plugin)
1342 int res = GNUNET_OK;
1345 if (GNUNET_CONFIGURATION_have_value
1346 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1349 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1353 plugin->ipv4 = GNUNET_YES;
1356 if (GNUNET_CONFIGURATION_have_value
1357 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1360 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1364 plugin->ipv6 = GNUNET_YES;
1366 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1368 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1370 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1372 res = GNUNET_SYSERR;
1375 /* Reading port number from config file */
1376 unsigned long long port;
1379 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1380 "PORT", &port)) || (port > 65535))
1382 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1383 _("Port is required! Fix in configuration\n"),
1385 res = GNUNET_SYSERR;
1388 plugin->port = port;
1390 plugin->client_only = GNUNET_NO;
1391 if (plugin->port == 0)
1393 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1394 _("Port 0, client only mode\n"));
1395 plugin->client_only = GNUNET_YES;
1398 char *bind4_address = NULL;
1400 if ((plugin->ipv4 == GNUNET_YES) &&
1402 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1403 "BINDTO", &bind4_address)))
1405 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1406 "Binding %s plugin to specific IPv4 address: `%s'\n",
1407 plugin->protocol, bind4_address);
1408 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1410 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1412 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1414 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1415 bind4_address, plugin->protocol);
1416 GNUNET_free (plugin->server_addr_v4);
1417 plugin->server_addr_v4 = NULL;
1421 plugin->server_addr_v4->sin_family = AF_INET;
1422 plugin->server_addr_v4->sin_port = htons (plugin->port);
1424 GNUNET_free (bind4_address);
1428 char *bind6_address = NULL;
1430 if ((plugin->ipv6 == GNUNET_YES) &&
1432 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1433 "BINDTO6", &bind6_address)))
1435 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1436 "Binding %s plugin to specific IPv6 address: `%s'\n",
1437 plugin->protocol, bind6_address);
1438 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1440 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1442 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1444 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1445 bind6_address, plugin->protocol);
1446 GNUNET_free (plugin->server_addr_v6);
1447 plugin->server_addr_v6 = NULL;
1451 plugin->server_addr_v6->sin6_family = AF_INET6;
1452 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1454 GNUNET_free (bind6_address);
1458 /* Optional parameters */
1459 unsigned long long maxneigh;
1462 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1463 "MAX_CONNECTIONS", &maxneigh))
1465 plugin->max_connections = maxneigh;
1472 * Entry point for the plugin.
1475 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1477 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1478 struct GNUNET_TRANSPORT_PluginFunctions *api;
1479 struct Plugin *plugin;
1482 if (NULL == env->receive)
1484 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1485 initialze the plugin or the API */
1486 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1488 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1489 api->address_to_string = &http_plugin_address_to_string;
1490 api->string_to_address = &http_string_to_address;
1494 plugin = GNUNET_malloc (sizeof (struct Plugin));
1496 plugin->outbound_sessions = 0;
1497 plugin->inbound_sessions = 0;
1498 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1500 api->disconnect = &http_plugin_disconnect;
1501 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1502 api->check_address = &http_plugin_address_suggested;
1503 api->address_to_string = &http_plugin_address_to_string;
1504 api->string_to_address = &http_string_to_address;
1505 api->get_session = &http_get_session;
1506 api->send = &http_plugin_send;
1509 plugin->name = "transport-https";
1510 plugin->protocol = "https";
1512 plugin->name = "transport-http";
1513 plugin->protocol = "http";
1515 /* Configure plugin from configuration */
1516 res = configure_plugin (plugin);
1517 if (res == GNUNET_SYSERR)
1519 GNUNET_free_non_null (plugin->server_addr_v4);
1520 GNUNET_free_non_null (plugin->server_addr_v6);
1521 GNUNET_free (plugin);
1526 /* checking IPv6 support */
1527 http_check_ipv6 (plugin);
1530 res = client_start (plugin);
1531 if (res == GNUNET_SYSERR)
1533 GNUNET_free_non_null (plugin->server_addr_v4);
1534 GNUNET_free_non_null (plugin->server_addr_v6);
1535 GNUNET_free (plugin);
1541 if (plugin->client_only == GNUNET_NO)
1543 res = server_start (plugin);
1544 if (res == GNUNET_SYSERR)
1546 server_stop (plugin);
1547 client_stop (plugin);
1549 GNUNET_free_non_null (plugin->server_addr_v4);
1550 GNUNET_free_non_null (plugin->server_addr_v6);
1551 GNUNET_free (plugin);
1556 /* Report addresses to transport service */
1557 start_report_addresses (plugin);
1559 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1560 "Plugin `%s' loaded\n", plugin->name);
1566 * Exit point from the plugin.
1569 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1571 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1572 struct Plugin *plugin = api->cls;
1581 /* Stop reporting addresses to transport service */
1582 stop_report_addresses (plugin);
1584 /* cleaning up sessions */
1588 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1589 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1590 if (s->inbound == GNUNET_NO)
1591 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1593 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1597 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1599 server_stop (plugin);
1601 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1603 client_stop (plugin);
1605 /* deleting up sessions */
1609 struct Session *t = s->next;
1611 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1613 struct HTTP_Message *msg = s->msg_head;
1614 struct HTTP_Message *tmp = NULL;
1620 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1621 if (msg->transmit_cont != NULL)
1623 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1633 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1634 "Plugin `%s' unloaded\n", plugin->name);
1635 GNUNET_free_non_null (plugin->server_addr_v4);
1636 GNUNET_free_non_null (plugin->server_addr_v6);
1637 GNUNET_free (plugin);
1642 /* end of plugin_transport_http.c */