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);
155 * Convert the transports address to a nice, human-readable
159 * @param type name of the transport that generated the address
160 * @param addr one of the addresses of the host, NULL for the last address
161 * the specific address format depends on the transport
162 * @param addrlen length of the address
163 * @param numeric should (IP) addresses be displayed in numeric form?
164 * @param timeout after how long should we give up?
165 * @param asc function to call on each string
166 * @param asc_cls closure for asc
169 http_plugin_address_pretty_printer (void *cls, const char *type,
170 const void *addr, size_t addrlen,
172 struct GNUNET_TIME_Relative timeout,
173 GNUNET_TRANSPORT_AddressStringCallback asc,
176 GNUNET_assert (cls != NULL);
177 struct PrettyPrinterContext *ppc;
179 struct sockaddr_in s4;
180 struct sockaddr_in6 s6;
184 if ((addrlen == sizeof (struct IPv6HttpAddress)) && (addr != NULL))
186 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
187 s6.sin6_family = AF_INET6;
188 s6.sin6_addr = a6->ipv6_addr;
189 s6.sin6_port = a6->u6_port;
190 #if HAVE_SOCKADDR_IN_SIN_LEN
191 s6.sin6_len = sizeof (struct sockaddr_in6);
194 sbs = sizeof (struct sockaddr_in6);
195 port = ntohs (a6->u6_port);
198 else if ((addrlen == sizeof (struct IPv4HttpAddress)) && (addr != NULL))
200 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
202 s4.sin_family = AF_INET;
203 s4.sin_addr.s_addr = a4->ipv4_addr;
204 s4.sin_port = a4->u4_port;
205 #if HAVE_SOCKADDR_IN_SIN_LEN
206 s4.sin_len = sizeof (struct sockaddr_in);
209 sbs = sizeof (struct sockaddr_in);
210 port = ntohs (a4->u4_port);
214 /* invalid address */
219 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
221 ppc->asc_cls = asc_cls;
224 ppc->addrlen = addrlen;
225 ppc->numeric = numeric;
226 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
232 * Another peer has suggested an address for this
233 * peer and transport plugin. Check that this could be a valid
234 * address. If so, consider adding it to the list
238 * @param addr pointer to the address
239 * @param addrlen length of addr
240 * @return GNUNET_OK if this is a plausible address for this peer
244 http_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
247 struct Plugin *plugin = cls;
248 struct IPv4HttpAddressWrapper *w_tv4 = plugin->ipv4_addr_head;
249 struct IPv6HttpAddressWrapper *w_tv6 = plugin->ipv6_addr_head;
253 GNUNET_assert (cls != NULL);
254 if ((addrlen != sizeof (struct sockaddr_in)) ||
255 (addrlen != sizeof (struct sockaddr_in6)))
256 return GNUNET_SYSERR;
258 if (addrlen == sizeof (struct IPv4HttpAddress))
260 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
262 while (w_tv4 != NULL)
265 memcmp (&w_tv4->addr.ipv4_addr, &a4->ipv4_addr,
266 sizeof (struct in_addr))) &&
267 (w_tv4->addr.u4_port == a4->u4_port))
274 return GNUNET_SYSERR;
276 if (addrlen == sizeof (struct sockaddr_in6))
278 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
280 while (w_tv6 != NULL)
283 memcmp (&w_tv6->addr6.ipv6_addr, &a6->ipv6_addr,
284 sizeof (struct in6_addr))) &&
285 (w_tv6->addr6.u6_port == a6->u6_port))
292 return GNUNET_SYSERR;
297 struct GNUNET_TIME_Relative
298 http_plugin_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
299 const struct GNUNET_MessageHeader *message,
300 struct Session *session, const char *sender_address,
301 uint16_t sender_address_len)
303 struct Session *s = cls;
304 struct Plugin *plugin = s->plugin;
305 struct GNUNET_TIME_Relative delay;
306 struct GNUNET_ATS_Information atsi[2];
308 atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
309 atsi[0].value = htonl (1);
310 atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
311 atsi[1].value = session->ats_address_network_type;
312 GNUNET_break (session->ats_address_network_type != ntohl (GNUNET_ATS_NET_UNSPECIFIED));
315 plugin->env->receive (plugin->env->cls, &s->target, message,
316 (const struct GNUNET_ATS_Information *) &atsi,
317 2, s, s->addr, s->addrlen);
322 * Function called for a quick conversion of the binary address to
323 * a numeric address. Note that the caller must not free the
324 * address and that the next call to this function is allowed
325 * to override the address again.
328 * @param addr binary address
329 * @param addrlen length of the address
330 * @return string representing the same address
333 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
336 struct IPv4HttpAddress *a4;
337 struct IPv6HttpAddress *a6;
339 static char rbuf[INET6_ADDRSTRLEN + 13];
343 if (addrlen == sizeof (struct IPv6HttpAddress))
345 a6 = (struct IPv6HttpAddress *) addr;
346 address = GNUNET_malloc (INET6_ADDRSTRLEN);
347 GNUNET_assert (NULL !=
348 inet_ntop (AF_INET6, &a6->ipv6_addr, address,
350 port = ntohs (a6->u6_port);
352 else if (addrlen == sizeof (struct IPv4HttpAddress))
354 a4 = (struct IPv4HttpAddress *) addr;
355 address = GNUNET_malloc (INET_ADDRSTRLEN);
356 GNUNET_assert (NULL !=
357 inet_ntop (AF_INET, &(a4->ipv4_addr), address,
359 port = ntohs (a4->u4_port);
363 /* invalid address */
368 char *protocol = "http";
370 char *protocol = "https";
373 GNUNET_assert (strlen (address) + 7 < (INET6_ADDRSTRLEN + 13));
374 if (addrlen == sizeof (struct IPv6HttpAddress))
376 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol,
378 else if (addrlen == sizeof (struct IPv4HttpAddress))
380 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, address,
383 GNUNET_free (address);
384 GNUNET_assert (res != 0);
389 lookup_session_old (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
390 struct Session *session, const void *addr, size_t addrlen,
397 for (t = plugin->head; NULL != t; t = t->next)
400 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
401 "Comparing peer `%s' address `%s' len %i session %X to \n",
402 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
404 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
405 "peer `%s' address `%s' len %i session %X \n\n",
406 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
408 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
409 memcmp (addr, t->addr, addrlen));
413 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
416 if ( (addrlen == t->addrlen) &&
417 (0 == memcmp (addr, t->addr, addrlen)) )
419 if ( (t == session) &&
420 (t->addrlen == session->addrlen) &&
421 (0 == memcmp (session->addr, t->addr, t->addrlen)) )
425 if ( ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO)) ||
426 ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) && (e_addr == GNUNET_YES)) ||
427 ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR)) )
434 lookup_session (struct Plugin *plugin,
435 const struct GNUNET_HELLO_Address *address)
439 for (pos = plugin->head; NULL != pos; pos = pos->next)
440 if ( (0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
441 (address->address_length == pos->addrlen) &&
442 (0 == memcmp (address->address, pos->addr, pos->addrlen)) )
449 delete_session (struct Session *s)
451 if (s->msg_tk != NULL)
453 GNUNET_SERVER_mst_destroy (s->msg_tk);
456 GNUNET_free (s->addr);
457 GNUNET_free_non_null (s->server_recv);
458 GNUNET_free_non_null (s->server_send);
463 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
464 const void *addr, size_t addrlen,
465 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
467 struct Session *s = NULL;
469 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
470 (addrlen == sizeof (struct IPv4HttpAddress)));
471 s = GNUNET_malloc (sizeof (struct Session));
472 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
474 s->addr = GNUNET_malloc (addrlen);
475 memcpy (s->addr, addr, addrlen);
476 s->addrlen = addrlen;
478 s->next_receive = GNUNET_TIME_absolute_get_zero ();
479 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
484 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
487 struct Plugin *plugin = cls;
489 plugin->env->session_end (plugin->env->cls, peer, s);
490 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
495 * Creates a new outbound session the transport service will use to send data to the
498 * @param cls the plugin
499 * @param address the address
500 * @return the session or NULL of max connections exceeded
503 static struct Session *
504 http_get_session (void *cls,
505 const struct GNUNET_HELLO_Address *address)
507 struct Plugin *plugin = cls;
508 struct Session * s = NULL;
509 struct GNUNET_ATS_Information ats;
512 GNUNET_assert (plugin != NULL);
513 GNUNET_assert (address != NULL);
514 GNUNET_assert (address->address != NULL);
516 ats.type = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
517 ats.value = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
519 /* find existing session */
520 s = lookup_session (plugin, address);
524 if (plugin->max_connections <= plugin->cur_connections)
526 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
527 "Maximum number of connections reached, "
528 "cannot connect to peer `%s'\n", GNUNET_i2s (&address->peer));
532 /* create new session */
533 addrlen = address->address_length;
535 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
536 (addrlen == sizeof (struct IPv4HttpAddress)));
538 s = GNUNET_malloc (sizeof (struct Session));
539 memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
541 s->addr = GNUNET_malloc (address->address_length);
542 memcpy (s->addr, address->address, address->address_length);
543 s->addrlen = addrlen;
545 s->next_receive = GNUNET_TIME_absolute_get_zero ();
546 s->inbound = GNUNET_NO;
547 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
550 if (addrlen == sizeof (struct IPv4HttpAddress))
552 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) address->address;
553 struct sockaddr_in s4;
555 s4.sin_family = AF_INET;
556 s4.sin_addr.s_addr = a4->ipv4_addr;
557 s4.sin_port = a4->u4_port;
558 #if HAVE_SOCKADDR_IN_SIN_LEN
559 s4.sin_len = sizeof (struct sockaddr_in);
561 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
563 if (addrlen == sizeof (struct IPv6HttpAddress))
565 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) address->address;
566 struct sockaddr_in6 s6;
568 s6.sin6_family = AF_INET6;
569 s6.sin6_addr = a6->ipv6_addr;
570 s6.sin6_port = a6->u6_port;
571 #if HAVE_SOCKADDR_IN_SIN_LEN
572 s6.sin6_len = sizeof (struct sockaddr_in6);
574 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
576 s->ats_address_network_type = ats.value;
578 /* add new session */
579 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
580 /* initiate new connection */
581 if (GNUNET_SYSERR == client_connect (s))
583 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
584 "Cannot connect to peer `%s' address `%s''\n",
585 http_plugin_address_to_string(NULL, s->addr, s->addrlen),
586 GNUNET_i2s (&s->target));
587 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
596 * Function that can be used by the transport service to transmit
597 * a message using the plugin. Note that in the case of a
598 * peer disconnecting, the continuation MUST be called
599 * prior to the disconnect notification itself. This function
600 * will be called with this peer's HELLO message to initiate
601 * a fresh connection to another peer.
604 * @param session which session must be used
605 * @param msgbuf the message to transmit
606 * @param msgbuf_size number of bytes in 'msgbuf'
607 * @param priority how important is the message (most plugins will
608 * ignore message priority and just FIFO)
609 * @param to how long to wait at most for the transmission (does not
610 * require plugins to discard the message after the timeout,
611 * just advisory for the desired delay; most plugins will ignore
613 * @param cont continuation to call once the message has
614 * been transmitted (or if the transport is ready
615 * for the next transmission call; or if the
616 * peer disconnected...); can be NULL
617 * @param cont_cls closure for cont
618 * @return number of bytes used (on the physical network, with overheads);
619 * -1 on hard errors (i.e. address invalid); 0 is a legal value
620 * and does NOT mean that the message was not transmitted (DV)
623 http_plugin_send (void *cls,
624 struct Session *session,
625 const char *msgbuf, size_t msgbuf_size,
626 unsigned int priority,
627 struct GNUNET_TIME_Relative to,
628 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
630 struct Plugin *plugin = cls;
631 struct HTTP_Message *msg;
635 GNUNET_assert (plugin != NULL);
636 GNUNET_assert (session != NULL);
638 /* lookup if session is really existing */
642 if ((tmp == session) &&
643 (0 == memcmp (&session->target, &tmp->target, sizeof (struct GNUNET_PeerIdentity))) &&
644 (session->addrlen == tmp->addrlen) &&
645 (0 == memcmp (session->addr, tmp->addr, tmp->addrlen)))
655 /* create new message and schedule */
657 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
659 msg->size = msgbuf_size;
661 msg->buf = (char *) &msg[1];
662 msg->transmit_cont = cont;
663 msg->transmit_cont_cls = cont_cls;
664 memcpy (msg->buf, msgbuf, msgbuf_size);
666 if (session->inbound == GNUNET_NO)
669 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
670 "Using outbound client session %p to send to `%session'\n", session,
671 GNUNET_i2s (&session->target));
674 client_send (session, msg);
677 if (session->inbound == GNUNET_YES)
680 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
681 "Using inbound server %p session to send to `%session'\n", session,
682 GNUNET_i2s (&session->target));
685 server_send (session, msg);
694 * Function that can be used to force the plugin to disconnect
695 * from the given peer and cancel all previous transmissions
696 * (and their continuationc).
699 * @param target peer from which to disconnect
702 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
704 struct Plugin *plugin = cls;
705 struct Session *next = NULL;
706 struct Session *s = plugin->head;
708 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
709 "Transport tells me to disconnect `%s'\n",
710 GNUNET_i2s (target));
714 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
716 if (s->inbound == GNUNET_NO)
717 GNUNET_assert (GNUNET_OK == client_disconnect (s));
719 GNUNET_assert (GNUNET_OK == server_disconnect (s));
720 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
722 struct HTTP_Message *msg = s->msg_head;
723 struct HTTP_Message *tmp = NULL;
729 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
730 if (msg->transmit_cont != NULL)
732 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
745 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
748 struct Plugin *plugin = cls;
749 struct IPv4HttpAddressWrapper *w_t4 = NULL;
750 struct IPv6HttpAddressWrapper *w_t6 = NULL;
753 af = addr->sa_family;
757 w_t4 = plugin->ipv4_addr_head;
758 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
762 int res = memcmp (&w_t4->addr.ipv4_addr,
764 sizeof (struct in_addr));
768 if (a4->sin_port != w_t4->addr.u4_port)
778 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
779 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
780 w_t4->addr.u4_port = a4->sin_port;
782 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
783 plugin->ipv4_addr_tail, w_t4);
786 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
787 "Notifying transport to add IPv4 address `%s'\n",
788 http_plugin_address_to_string (NULL, &w_t4->addr,
792 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
793 sizeof (struct IPv4HttpAddress));
797 w_t6 = plugin->ipv6_addr_head;
798 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
802 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
803 sizeof (struct in6_addr));
807 if (a6->sin6_port != w_t6->addr6.u6_port)
816 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
818 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
819 w_t6->addr6.u6_port = a6->sin6_port;
821 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
822 plugin->ipv6_addr_tail, w_t6);
825 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
826 "Notifying transport to add IPv6 address `%s'\n",
827 http_plugin_address_to_string (NULL, &w_t6->addr6,
831 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
832 sizeof (struct IPv6HttpAddress));
841 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
844 struct Plugin *plugin = cls;
845 struct IPv4HttpAddressWrapper *w_t4 = NULL;
846 struct IPv6HttpAddressWrapper *w_t6 = NULL;
849 af = addr->sa_family;
853 w_t4 = plugin->ipv4_addr_head;
854 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
858 int res = memcmp (&w_t4->addr.ipv4_addr,
860 sizeof (struct in_addr));
864 if (a4->sin_port != w_t4->addr.u4_port)
876 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
877 "Notifying transport to remove IPv4 address `%s'\n",
878 http_plugin_address_to_string (NULL, &w_t4->addr,
882 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
883 sizeof (struct IPv4HttpAddress));
885 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
890 w_t6 = plugin->ipv6_addr_head;
891 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
895 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
896 sizeof (struct in6_addr));
900 if (a6->sin6_port != w_t6->addr6.u6_port)
910 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
911 "Notifying transport to remove IPv6 address `%s'\n",
912 http_plugin_address_to_string (NULL, &w_t6->addr6,
916 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
917 sizeof (struct IPv6HttpAddress));
919 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
930 * Our external IP address/port mapping has changed.
932 * @param cls closure, the 'struct LocalAddrList'
933 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
934 * the previous (now invalid) one
935 * @param addr either the previous or the new public IP address
936 * @param addrlen actual lenght of the address
939 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
942 GNUNET_assert (cls != NULL);
944 struct Plugin *plugin = cls;
947 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
948 "NPMC called %s to address `%s'\n",
949 (add_remove == GNUNET_NO) ? "remove" : "add",
950 GNUNET_a2s (addr, addrlen));
955 nat_add_address (cls, add_remove, addr, addrlen);
958 nat_remove_address (cls, add_remove, addr, addrlen);
964 http_check_ipv6 (struct Plugin *plugin)
966 struct GNUNET_NETWORK_Handle *desc = NULL;
968 if (plugin->ipv6 == GNUNET_YES)
970 /* probe IPv6 support */
971 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
974 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
977 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
979 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
981 ("Disabling IPv6 since it is not supported on this system!\n"));
982 plugin->ipv6 = GNUNET_NO;
986 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
990 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
991 "Testing IPv6 on this system: %s\n",
992 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
997 http_get_addresses (struct Plugin *plugin, const char *serviceName,
998 const struct GNUNET_CONFIGURATION_Handle *cfg,
999 struct sockaddr ***addrs, socklen_t ** addr_lens)
1002 unsigned long long port;
1003 struct addrinfo hints;
1004 struct addrinfo *res;
1005 struct addrinfo *pos;
1006 struct addrinfo *next;
1010 struct sockaddr **saddrs;
1011 socklen_t *saddrlens;
1017 disablev6 = !plugin->ipv6;
1020 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
1022 GNUNET_break (GNUNET_OK ==
1023 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
1027 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1029 ("Require valid port number for service in configuration!\n"));
1030 return GNUNET_SYSERR;
1034 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1036 GNUNET_break (GNUNET_OK ==
1037 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1038 "BINDTO", &hostname));
1043 if (hostname != NULL)
1045 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1046 "Resolving `%s' since that is where `%s' will bind to.\n",
1047 hostname, serviceName);
1048 memset (&hints, 0, sizeof (struct addrinfo));
1050 hints.ai_family = AF_INET;
1051 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1054 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1055 hostname, gai_strerror (ret));
1056 GNUNET_free (hostname);
1057 return GNUNET_SYSERR;
1061 while (NULL != (pos = next))
1063 next = pos->ai_next;
1064 if ((disablev6) && (pos->ai_family == AF_INET6))
1070 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1071 _("Failed to find %saddress for `%s'.\n"),
1072 disablev6 ? "IPv4 " : "", hostname);
1074 GNUNET_free (hostname);
1075 return GNUNET_SYSERR;
1078 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1079 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1082 while (NULL != (pos = next))
1084 next = pos->ai_next;
1085 if ((disablev6) && (pos->ai_family == AF_INET6))
1087 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1088 continue; /* not TCP */
1089 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1090 continue; /* huh? */
1091 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1092 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1094 if (pos->ai_family == AF_INET)
1096 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1097 saddrlens[i] = pos->ai_addrlen;
1098 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1099 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1100 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1104 GNUNET_assert (pos->ai_family == AF_INET6);
1105 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1106 saddrlens[i] = pos->ai_addrlen;
1107 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1108 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1109 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1113 GNUNET_free (hostname);
1119 /* will bind against everything, just set port */
1125 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1126 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1128 saddrlens[i] = sizeof (struct sockaddr_in);
1129 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1130 #if HAVE_SOCKADDR_IN_SIN_LEN
1131 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1133 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1134 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1140 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1141 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1143 saddrlens[i] = sizeof (struct sockaddr_in6);
1144 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1145 #if HAVE_SOCKADDR_IN_SIN_LEN
1146 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1148 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1149 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1151 saddrlens[i] = sizeof (struct sockaddr_in);
1152 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1153 #if HAVE_SOCKADDR_IN_SIN_LEN
1154 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1156 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1157 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1161 *addr_lens = saddrlens;
1166 start_report_addresses (struct Plugin *plugin)
1168 int res = GNUNET_OK;
1169 struct sockaddr **addrs;
1170 socklen_t *addrlens;
1173 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1175 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1176 _("Found %u addresses to report to NAT service\n"), res);
1178 if (res != GNUNET_SYSERR)
1181 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1183 (const struct sockaddr **) addrs, addrlens,
1184 &nat_port_map_callback, NULL, plugin);
1189 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1190 GNUNET_a2s (addrs[res], addrlens[res]));
1192 GNUNET_assert (addrs[res] != NULL);
1193 GNUNET_free (addrs[res]);
1195 GNUNET_free_non_null (addrs);
1196 GNUNET_free_non_null (addrlens);
1201 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1202 NULL, NULL, plugin);
1207 stop_report_addresses (struct Plugin *plugin)
1209 /* Stop NAT handle */
1210 GNUNET_NAT_unregister (plugin->nat);
1212 /* Clean up addresses */
1213 struct IPv4HttpAddressWrapper *w_t4;
1214 struct IPv6HttpAddressWrapper *w_t6;
1216 while (plugin->ipv4_addr_head != NULL)
1218 w_t4 = plugin->ipv4_addr_head;
1219 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1224 while (plugin->ipv6_addr_head != NULL)
1226 w_t6 = plugin->ipv6_addr_head;
1227 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1234 configure_plugin (struct Plugin *plugin)
1236 int res = GNUNET_OK;
1239 if (GNUNET_CONFIGURATION_have_value
1240 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1243 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1247 plugin->ipv4 = GNUNET_YES;
1250 if (GNUNET_CONFIGURATION_have_value
1251 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1254 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1258 plugin->ipv6 = GNUNET_YES;
1260 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1262 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1264 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1266 res = GNUNET_SYSERR;
1269 /* Reading port number from config file */
1270 unsigned long long port;
1273 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1274 "PORT", &port)) || (port > 65535))
1276 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1277 _("Port is required! Fix in configuration\n"),
1279 res = GNUNET_SYSERR;
1282 plugin->port = port;
1284 plugin->client_only = GNUNET_NO;
1285 if (plugin->port == 0)
1287 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1288 _("Port 0, client only mode\n"));
1289 plugin->client_only = GNUNET_YES;
1292 char *bind4_address = NULL;
1294 if ((plugin->ipv4 == GNUNET_YES) &&
1296 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1297 "BINDTO", &bind4_address)))
1299 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1300 "Binding %s plugin to specific IPv4 address: `%s'\n",
1301 plugin->protocol, bind4_address);
1302 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1304 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1306 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1308 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1309 bind4_address, plugin->protocol);
1310 GNUNET_free (plugin->server_addr_v4);
1311 plugin->server_addr_v4 = NULL;
1315 plugin->server_addr_v4->sin_family = AF_INET;
1316 plugin->server_addr_v4->sin_port = htons (plugin->port);
1318 GNUNET_free (bind4_address);
1322 char *bind6_address = NULL;
1324 if ((plugin->ipv6 == GNUNET_YES) &&
1326 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1327 "BINDTO6", &bind6_address)))
1329 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1330 "Binding %s plugin to specific IPv6 address: `%s'\n",
1331 plugin->protocol, bind6_address);
1332 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1334 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1336 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1338 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1339 bind6_address, plugin->protocol);
1340 GNUNET_free (plugin->server_addr_v6);
1341 plugin->server_addr_v6 = NULL;
1345 plugin->server_addr_v6->sin6_family = AF_INET6;
1346 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1348 GNUNET_free (bind6_address);
1352 /* Optional parameters */
1353 unsigned long long maxneigh;
1356 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1357 "MAX_CONNECTIONS", &maxneigh))
1359 plugin->max_connections = maxneigh;
1366 * Entry point for the plugin.
1369 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1371 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1372 struct GNUNET_TRANSPORT_PluginFunctions *api;
1373 struct Plugin *plugin;
1376 plugin = GNUNET_malloc (sizeof (struct Plugin));
1378 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1380 api->disconnect = &http_plugin_disconnect;
1381 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1382 api->check_address = &http_plugin_address_suggested;
1383 api->address_to_string = &http_plugin_address_to_string;
1384 api->get_session = &http_get_session;
1385 api->send = &http_plugin_send;
1388 plugin->name = "transport-https";
1389 plugin->protocol = "https";
1391 plugin->name = "transport-http";
1392 plugin->protocol = "http";
1394 /* Configure plugin from configuration */
1395 res = configure_plugin (plugin);
1396 if (res == GNUNET_SYSERR)
1398 GNUNET_free_non_null (plugin->server_addr_v4);
1399 GNUNET_free_non_null (plugin->server_addr_v6);
1400 GNUNET_free (plugin);
1405 /* checking IPv6 support */
1406 http_check_ipv6 (plugin);
1409 res = client_start (plugin);
1410 if (res == GNUNET_SYSERR)
1412 GNUNET_free_non_null (plugin->server_addr_v4);
1413 GNUNET_free_non_null (plugin->server_addr_v6);
1414 GNUNET_free (plugin);
1420 if (plugin->client_only == GNUNET_NO)
1422 res = server_start (plugin);
1423 if (res == GNUNET_SYSERR)
1425 server_stop (plugin);
1426 client_stop (plugin);
1428 GNUNET_free_non_null (plugin->server_addr_v4);
1429 GNUNET_free_non_null (plugin->server_addr_v6);
1430 GNUNET_free (plugin);
1435 /* Report addresses to transport service */
1436 start_report_addresses (plugin);
1439 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1440 "Plugin `%s' loaded\n", plugin->name);
1448 * Exit point from the plugin.
1451 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1453 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1454 struct Plugin *plugin = api->cls;
1455 struct Session *s = NULL;
1457 /* Stop reporting addresses to transport service */
1458 stop_report_addresses (plugin);
1460 /* cleaning up sessions */
1465 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1466 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1468 if (s->inbound == GNUNET_NO)
1469 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1471 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1476 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1479 server_stop (plugin);
1482 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1485 client_stop (plugin);
1487 /* deleting up sessions */
1491 struct Session *t = s->next;
1493 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1495 struct HTTP_Message *msg = s->msg_head;
1496 struct HTTP_Message *tmp = NULL;
1502 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1503 if (msg->transmit_cont != NULL)
1505 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1517 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1518 "Plugin `%s' unloaded\n", plugin->name);
1521 GNUNET_free_non_null (plugin->server_addr_v4);
1522 GNUNET_free_non_null (plugin->server_addr_v6);
1523 GNUNET_free (plugin);
1529 /* end of plugin_transport_http.c */