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3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
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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
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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.
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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);
217 /* invalid address */
222 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
224 ppc->asc_cls = asc_cls;
227 ppc->addrlen = addrlen;
228 ppc->numeric = numeric;
229 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
235 * Another peer has suggested an address for this
236 * peer and transport plugin. Check that this could be a valid
237 * address. If so, consider adding it to the list
241 * @param addr pointer to the address
242 * @param addrlen length of addr
243 * @return GNUNET_OK if this is a plausible address for this peer
247 http_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
250 struct Plugin *plugin = cls;
251 struct IPv4HttpAddressWrapper *w_tv4 = plugin->ipv4_addr_head;
252 struct IPv6HttpAddressWrapper *w_tv6 = plugin->ipv6_addr_head;
256 GNUNET_assert (cls != NULL);
257 if ((addrlen != sizeof (struct sockaddr_in)) ||
258 (addrlen != sizeof (struct sockaddr_in6)))
259 return GNUNET_SYSERR;
261 if (addrlen == sizeof (struct IPv4HttpAddress))
263 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
265 while (w_tv4 != NULL)
268 memcmp (&w_tv4->addr.ipv4_addr, &a4->ipv4_addr,
269 sizeof (struct in_addr))) &&
270 (w_tv4->addr.u4_port == a4->u4_port))
277 return GNUNET_SYSERR;
279 if (addrlen == sizeof (struct sockaddr_in6))
281 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
283 while (w_tv6 != NULL)
286 memcmp (&w_tv6->addr6.ipv6_addr, &a6->ipv6_addr,
287 sizeof (struct in6_addr))) &&
288 (w_tv6->addr6.u6_port == a6->u6_port))
295 return GNUNET_SYSERR;
300 struct GNUNET_TIME_Relative
301 http_plugin_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
302 const struct GNUNET_MessageHeader *message,
303 struct Session *session, const char *sender_address,
304 uint16_t sender_address_len)
306 struct Session *s = cls;
307 struct Plugin *plugin = s->plugin;
308 struct GNUNET_TIME_Relative delay;
309 struct GNUNET_ATS_Information atsi[2];
311 atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
312 atsi[0].value = htonl (1);
313 atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
314 atsi[1].value = session->ats_address_network_type;
315 GNUNET_break (session->ats_address_network_type != ntohl (GNUNET_ATS_NET_UNSPECIFIED));
318 plugin->env->receive (plugin->env->cls, &s->target, message,
319 (const struct GNUNET_ATS_Information *) &atsi,
320 2, s, s->addr, s->addrlen);
326 * Function called to convert a string address to
329 * @param cls closure ('struct Plugin*')
330 * @param addr string address
331 * @param addrlen length of the address
332 * @param buf location to store the buffer
333 * If the function returns GNUNET_SYSERR, its contents are undefined.
334 * @param added length of created address
335 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
337 int http_string_to_address (void *cls,
344 char *protocol = "http";
346 char *protocol = "https";
348 char *addr_str = NULL;
349 struct sockaddr_in addr_4;
350 struct sockaddr_in6 addr_6;
351 struct IPv4HttpAddress * http_4addr;
352 struct IPv6HttpAddress * http_6addr;
354 if ((addr == NULL) || (addrlen == 0) || (buf == NULL))
355 return GNUNET_SYSERR;
357 /* protocoll + "://" + ":" */
358 if (addrlen <= strlen (protocol) + 4);
359 return GNUNET_SYSERR;
361 if (NULL == (addr = strstr(addr_str, "://")))
362 return GNUNET_SYSERR;
364 addr_str = &addr_str[3];
366 if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv4(addr, strlen(addr_str), &addr_4))
368 http_4addr = GNUNET_malloc (sizeof (struct IPv4HttpAddress));
369 http_4addr = GNUNET_malloc (sizeof (struct IPv6HttpAddress));
370 http_4addr->u4_port = addr_4.sin_port;
371 http_4addr->ipv4_addr = (uint32_t) addr_4.sin_addr.s_addr;
374 (*added) = sizeof (struct IPv4HttpAddress);
378 else if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv6(addr, strlen(addr_str), &addr_6))
380 http_6addr = GNUNET_malloc (sizeof (struct IPv6HttpAddress));
381 http_6addr->u6_port = addr_6.sin6_port;
382 http_6addr->ipv6_addr = addr_6.sin6_addr;
385 (*added) = sizeof (struct IPv6HttpAddress);
392 return GNUNET_SYSERR;
399 * Function called for a quick conversion of the binary address to
400 * a numeric address. Note that the caller must not free the
401 * address and that the next call to this function is allowed
402 * to override the address again.
405 * @param addr binary address
406 * @param addrlen length of the address
407 * @return string representing the same address
410 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
413 struct IPv4HttpAddress *a4;
414 struct IPv6HttpAddress *a6;
416 static char rbuf[INET6_ADDRSTRLEN + 13];
420 if (addrlen == sizeof (struct IPv6HttpAddress))
422 a6 = (struct IPv6HttpAddress *) addr;
423 address = GNUNET_malloc (INET6_ADDRSTRLEN);
424 GNUNET_assert (NULL !=
425 inet_ntop (AF_INET6, &a6->ipv6_addr, address,
427 port = ntohs (a6->u6_port);
429 else if (addrlen == sizeof (struct IPv4HttpAddress))
431 a4 = (struct IPv4HttpAddress *) addr;
432 address = GNUNET_malloc (INET_ADDRSTRLEN);
433 GNUNET_assert (NULL !=
434 inet_ntop (AF_INET, &(a4->ipv4_addr), address,
436 port = ntohs (a4->u4_port);
440 /* invalid address */
445 char *protocol = "http";
447 char *protocol = "https";
450 GNUNET_assert (strlen (address) + 7 < (INET6_ADDRSTRLEN + 13));
451 if (addrlen == sizeof (struct IPv6HttpAddress))
453 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol,
455 else if (addrlen == sizeof (struct IPv4HttpAddress))
457 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, address,
460 GNUNET_free (address);
461 GNUNET_assert (res != 0);
466 lookup_session_old (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
467 struct Session *session, const void *addr, size_t addrlen,
474 for (t = plugin->head; NULL != t; t = t->next)
477 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
478 "Comparing peer `%s' address `%s' len %i session %X to \n",
479 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
481 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
482 "peer `%s' address `%s' len %i session %X \n\n",
483 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
485 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
486 memcmp (addr, t->addr, addrlen));
490 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
493 if ( (addrlen == t->addrlen) &&
494 (0 == memcmp (addr, t->addr, addrlen)) )
496 if ( (t == session) &&
497 (t->addrlen == session->addrlen) &&
498 (0 == memcmp (session->addr, t->addr, t->addrlen)) )
502 if ( ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO)) ||
503 ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) && (e_addr == GNUNET_YES)) ||
504 ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR)) )
511 lookup_session (struct Plugin *plugin,
512 const struct GNUNET_HELLO_Address *address)
516 for (pos = plugin->head; NULL != pos; pos = pos->next)
517 if ( (0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
518 (address->address_length == pos->addrlen) &&
519 (0 == memcmp (address->address, pos->addr, pos->addrlen)) )
526 delete_session (struct Session *s)
528 if (s->msg_tk != NULL)
530 GNUNET_SERVER_mst_destroy (s->msg_tk);
533 GNUNET_free (s->addr);
534 GNUNET_free_non_null (s->server_recv);
535 GNUNET_free_non_null (s->server_send);
540 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
541 const void *addr, size_t addrlen,
542 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
544 struct Session *s = NULL;
546 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
547 (addrlen == sizeof (struct IPv4HttpAddress)));
548 s = GNUNET_malloc (sizeof (struct Session));
549 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
551 s->addr = GNUNET_malloc (addrlen);
552 memcpy (s->addr, addr, addrlen);
553 s->addrlen = addrlen;
555 s->next_receive = GNUNET_TIME_absolute_get_zero ();
556 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
561 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
564 struct Plugin *plugin = cls;
566 plugin->env->session_end (plugin->env->cls, peer, s);
567 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
572 * Creates a new outbound session the transport service will use to send data to the
575 * @param cls the plugin
576 * @param address the address
577 * @return the session or NULL of max connections exceeded
580 static struct Session *
581 http_get_session (void *cls,
582 const struct GNUNET_HELLO_Address *address)
584 struct Plugin *plugin = cls;
585 struct Session * s = NULL;
586 struct GNUNET_ATS_Information ats;
589 GNUNET_assert (plugin != NULL);
590 GNUNET_assert (address != NULL);
591 GNUNET_assert (address->address != NULL);
593 ats.type = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
594 ats.value = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
596 /* find existing session */
597 s = lookup_session (plugin, address);
601 if (plugin->max_connections <= plugin->cur_connections)
603 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
604 "Maximum number of connections reached, "
605 "cannot connect to peer `%s'\n", GNUNET_i2s (&address->peer));
609 /* create new session */
610 addrlen = address->address_length;
612 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
613 (addrlen == sizeof (struct IPv4HttpAddress)));
615 s = GNUNET_malloc (sizeof (struct Session));
616 memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
618 s->addr = GNUNET_malloc (address->address_length);
619 memcpy (s->addr, address->address, address->address_length);
620 s->addrlen = addrlen;
622 s->next_receive = GNUNET_TIME_absolute_get_zero ();
623 s->inbound = GNUNET_NO;
624 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
627 if (addrlen == sizeof (struct IPv4HttpAddress))
629 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) address->address;
630 struct sockaddr_in s4;
632 s4.sin_family = AF_INET;
633 s4.sin_addr.s_addr = a4->ipv4_addr;
634 s4.sin_port = a4->u4_port;
635 #if HAVE_SOCKADDR_IN_SIN_LEN
636 s4.sin_len = sizeof (struct sockaddr_in);
638 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
640 if (addrlen == sizeof (struct IPv6HttpAddress))
642 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) address->address;
643 struct sockaddr_in6 s6;
645 s6.sin6_family = AF_INET6;
646 s6.sin6_addr = a6->ipv6_addr;
647 s6.sin6_port = a6->u6_port;
648 #if HAVE_SOCKADDR_IN_SIN_LEN
649 s6.sin6_len = sizeof (struct sockaddr_in6);
651 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
653 s->ats_address_network_type = ats.value;
655 /* add new session */
656 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
657 /* initiate new connection */
658 if (GNUNET_SYSERR == client_connect (s))
660 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
661 "Cannot connect to peer `%s' address `%s''\n",
662 http_plugin_address_to_string(NULL, s->addr, s->addrlen),
663 GNUNET_i2s (&s->target));
664 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
673 * Function that can be used by the transport service to transmit
674 * a message using the plugin. Note that in the case of a
675 * peer disconnecting, the continuation MUST be called
676 * prior to the disconnect notification itself. This function
677 * will be called with this peer's HELLO message to initiate
678 * a fresh connection to another peer.
681 * @param session which session must be used
682 * @param msgbuf the message to transmit
683 * @param msgbuf_size number of bytes in 'msgbuf'
684 * @param priority how important is the message (most plugins will
685 * ignore message priority and just FIFO)
686 * @param to how long to wait at most for the transmission (does not
687 * require plugins to discard the message after the timeout,
688 * just advisory for the desired delay; most plugins will ignore
690 * @param cont continuation to call once the message has
691 * been transmitted (or if the transport is ready
692 * for the next transmission call; or if the
693 * peer disconnected...); can be NULL
694 * @param cont_cls closure for cont
695 * @return number of bytes used (on the physical network, with overheads);
696 * -1 on hard errors (i.e. address invalid); 0 is a legal value
697 * and does NOT mean that the message was not transmitted (DV)
700 http_plugin_send (void *cls,
701 struct Session *session,
702 const char *msgbuf, size_t msgbuf_size,
703 unsigned int priority,
704 struct GNUNET_TIME_Relative to,
705 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
707 struct Plugin *plugin = cls;
708 struct HTTP_Message *msg;
712 GNUNET_assert (plugin != NULL);
713 GNUNET_assert (session != NULL);
715 /* lookup if session is really existing */
719 if ((tmp == session) &&
720 (0 == memcmp (&session->target, &tmp->target, sizeof (struct GNUNET_PeerIdentity))) &&
721 (session->addrlen == tmp->addrlen) &&
722 (0 == memcmp (session->addr, tmp->addr, tmp->addrlen)))
732 /* create new message and schedule */
734 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
736 msg->size = msgbuf_size;
738 msg->buf = (char *) &msg[1];
739 msg->transmit_cont = cont;
740 msg->transmit_cont_cls = cont_cls;
741 memcpy (msg->buf, msgbuf, msgbuf_size);
743 if (session->inbound == GNUNET_NO)
746 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
747 "Using outbound client session %p to send to `%session'\n", session,
748 GNUNET_i2s (&session->target));
751 client_send (session, msg);
754 if (session->inbound == GNUNET_YES)
757 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
758 "Using inbound server %p session to send to `%session'\n", session,
759 GNUNET_i2s (&session->target));
762 server_send (session, msg);
771 * Function that can be used to force the plugin to disconnect
772 * from the given peer and cancel all previous transmissions
773 * (and their continuationc).
776 * @param target peer from which to disconnect
779 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
781 struct Plugin *plugin = cls;
782 struct Session *next = NULL;
783 struct Session *s = plugin->head;
785 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
786 "Transport tells me to disconnect `%s'\n",
787 GNUNET_i2s (target));
791 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
793 if (s->inbound == GNUNET_NO)
794 GNUNET_assert (GNUNET_OK == client_disconnect (s));
796 GNUNET_assert (GNUNET_OK == server_disconnect (s));
797 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
799 struct HTTP_Message *msg = s->msg_head;
800 struct HTTP_Message *tmp = NULL;
806 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
807 if (msg->transmit_cont != NULL)
809 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
822 find_address (struct Plugin *plugin, const struct sockaddr *addr, socklen_t addrlen)
825 struct IPv4HttpAddressWrapper *w_t4 = NULL;
826 struct IPv6HttpAddressWrapper *w_t6 = NULL;
828 af = addr->sa_family;
832 w_t4 = plugin->ipv4_addr_head;
833 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
837 int res = memcmp (&w_t4->addr.ipv4_addr,
839 sizeof (struct in_addr));
843 if (a4->sin_port != w_t4->addr.u4_port)
854 w_t6 = plugin->ipv6_addr_head;
855 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
859 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
860 sizeof (struct in6_addr));
864 if (a6->sin6_port != w_t6->addr6.u6_port)
881 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
884 struct Plugin *plugin = cls;
885 struct IPv4HttpAddressWrapper *w_t4 = NULL;
886 struct IPv6HttpAddressWrapper *w_t6 = NULL;
889 af = addr->sa_family;
893 w_t4 = find_address (plugin, addr, addrlen);
896 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
897 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
898 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
899 w_t4->addr.u4_port = a4->sin_port;
901 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
902 plugin->ipv4_addr_tail, w_t4);
905 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
906 "Notifying transport to add IPv4 address `%s'\n",
907 http_plugin_address_to_string (NULL, &w_t4->addr,
911 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
912 sizeof (struct IPv4HttpAddress));
916 w_t6 = find_address (plugin, addr, addrlen);
919 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
920 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
921 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
922 w_t6->addr6.u6_port = a6->sin6_port;
924 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
925 plugin->ipv6_addr_tail, w_t6);
928 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
929 "Notifying transport to add IPv6 address `%s'\n",
930 http_plugin_address_to_string (NULL, &w_t6->addr6,
934 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
935 sizeof (struct IPv6HttpAddress));
944 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
947 struct Plugin *plugin = cls;
948 struct IPv4HttpAddressWrapper *w_t4 = NULL;
949 struct IPv6HttpAddressWrapper *w_t6 = NULL;
952 af = addr->sa_family;
956 w_t4 = find_address (plugin, addr, addrlen);
960 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
961 "Notifying transport to remove IPv4 address `%s'\n",
962 http_plugin_address_to_string (NULL, &w_t4->addr,
966 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
967 sizeof (struct IPv4HttpAddress));
969 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
974 w_t6 = find_address (plugin, addr, addrlen);
978 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
979 "Notifying transport to remove IPv6 address `%s'\n",
980 http_plugin_address_to_string (NULL, &w_t6->addr6,
984 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
985 sizeof (struct IPv6HttpAddress));
987 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
998 * Our external IP address/port mapping has changed.
1000 * @param cls closure, the 'struct LocalAddrList'
1001 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1002 * the previous (now invalid) one
1003 * @param addr either the previous or the new public IP address
1004 * @param addrlen actual lenght of the address
1007 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
1010 GNUNET_assert (cls != NULL);
1012 struct Plugin *plugin = cls;
1015 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1016 "NPMC called %s to address `%s'\n",
1017 (add_remove == GNUNET_NO) ? "remove" : "add",
1018 GNUNET_a2s (addr, addrlen));
1023 nat_add_address (cls, add_remove, addr, addrlen);
1026 nat_remove_address (cls, add_remove, addr, addrlen);
1032 http_check_ipv6 (struct Plugin *plugin)
1034 struct GNUNET_NETWORK_Handle *desc = NULL;
1036 if (plugin->ipv6 == GNUNET_YES)
1038 /* probe IPv6 support */
1039 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
1042 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
1045 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1047 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
1049 ("Disabling IPv6 since it is not supported on this system!\n"));
1050 plugin->ipv6 = GNUNET_NO;
1054 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
1058 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1059 "Testing IPv6 on this system: %s\n",
1060 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
1065 http_get_addresses (struct Plugin *plugin, const char *serviceName,
1066 const struct GNUNET_CONFIGURATION_Handle *cfg,
1067 struct sockaddr ***addrs, socklen_t ** addr_lens)
1070 unsigned long long port;
1071 struct addrinfo hints;
1072 struct addrinfo *res;
1073 struct addrinfo *pos;
1074 struct addrinfo *next;
1078 struct sockaddr **saddrs;
1079 socklen_t *saddrlens;
1085 disablev6 = !plugin->ipv6;
1088 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
1090 GNUNET_break (GNUNET_OK ==
1091 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
1095 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1097 ("Require valid port number for service in configuration!\n"));
1098 return GNUNET_SYSERR;
1102 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1104 GNUNET_break (GNUNET_OK ==
1105 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1106 "BINDTO", &hostname));
1111 if (hostname != NULL)
1113 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1114 "Resolving `%s' since that is where `%s' will bind to.\n",
1115 hostname, serviceName);
1116 memset (&hints, 0, sizeof (struct addrinfo));
1118 hints.ai_family = AF_INET;
1119 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1122 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1123 hostname, gai_strerror (ret));
1124 GNUNET_free (hostname);
1125 return GNUNET_SYSERR;
1129 while (NULL != (pos = next))
1131 next = pos->ai_next;
1132 if ((disablev6) && (pos->ai_family == AF_INET6))
1138 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1139 _("Failed to find %saddress for `%s'.\n"),
1140 disablev6 ? "IPv4 " : "", hostname);
1142 GNUNET_free (hostname);
1143 return GNUNET_SYSERR;
1146 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1147 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1150 while (NULL != (pos = next))
1152 next = pos->ai_next;
1153 if ((disablev6) && (pos->ai_family == AF_INET6))
1155 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1156 continue; /* not TCP */
1157 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1158 continue; /* huh? */
1159 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1160 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1162 if (pos->ai_family == AF_INET)
1164 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1165 saddrlens[i] = pos->ai_addrlen;
1166 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1167 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1168 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1172 GNUNET_assert (pos->ai_family == AF_INET6);
1173 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1174 saddrlens[i] = pos->ai_addrlen;
1175 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1176 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1177 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1181 GNUNET_free (hostname);
1187 /* will bind against everything, just set port */
1193 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1194 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1196 saddrlens[i] = sizeof (struct sockaddr_in);
1197 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1198 #if HAVE_SOCKADDR_IN_SIN_LEN
1199 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1201 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1202 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1208 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1209 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1211 saddrlens[i] = sizeof (struct sockaddr_in6);
1212 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1213 #if HAVE_SOCKADDR_IN_SIN_LEN
1214 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1216 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1217 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1219 saddrlens[i] = sizeof (struct sockaddr_in);
1220 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1221 #if HAVE_SOCKADDR_IN_SIN_LEN
1222 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1224 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1225 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1229 *addr_lens = saddrlens;
1234 start_report_addresses (struct Plugin *plugin)
1236 int res = GNUNET_OK;
1237 struct sockaddr **addrs;
1238 socklen_t *addrlens;
1241 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1243 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1244 _("Found %u addresses to report to NAT service\n"), res);
1246 if (res != GNUNET_SYSERR)
1249 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1251 (const struct sockaddr **) addrs, addrlens,
1252 &nat_port_map_callback, NULL, plugin);
1257 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1258 GNUNET_a2s (addrs[res], addrlens[res]));
1260 GNUNET_assert (addrs[res] != NULL);
1261 GNUNET_free (addrs[res]);
1263 GNUNET_free_non_null (addrs);
1264 GNUNET_free_non_null (addrlens);
1269 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1270 NULL, NULL, plugin);
1275 stop_report_addresses (struct Plugin *plugin)
1277 /* Stop NAT handle */
1278 GNUNET_NAT_unregister (plugin->nat);
1280 /* Clean up addresses */
1281 struct IPv4HttpAddressWrapper *w_t4;
1282 struct IPv6HttpAddressWrapper *w_t6;
1284 while (plugin->ipv4_addr_head != NULL)
1286 w_t4 = plugin->ipv4_addr_head;
1287 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1292 while (plugin->ipv6_addr_head != NULL)
1294 w_t6 = plugin->ipv6_addr_head;
1295 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1302 configure_plugin (struct Plugin *plugin)
1304 int res = GNUNET_OK;
1307 if (GNUNET_CONFIGURATION_have_value
1308 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1311 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1315 plugin->ipv4 = GNUNET_YES;
1318 if (GNUNET_CONFIGURATION_have_value
1319 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1322 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1326 plugin->ipv6 = GNUNET_YES;
1328 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1330 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1332 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1334 res = GNUNET_SYSERR;
1337 /* Reading port number from config file */
1338 unsigned long long port;
1341 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1342 "PORT", &port)) || (port > 65535))
1344 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1345 _("Port is required! Fix in configuration\n"),
1347 res = GNUNET_SYSERR;
1350 plugin->port = port;
1352 plugin->client_only = GNUNET_NO;
1353 if (plugin->port == 0)
1355 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1356 _("Port 0, client only mode\n"));
1357 plugin->client_only = GNUNET_YES;
1360 char *bind4_address = NULL;
1362 if ((plugin->ipv4 == GNUNET_YES) &&
1364 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1365 "BINDTO", &bind4_address)))
1367 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1368 "Binding %s plugin to specific IPv4 address: `%s'\n",
1369 plugin->protocol, bind4_address);
1370 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1372 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1374 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1376 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1377 bind4_address, plugin->protocol);
1378 GNUNET_free (plugin->server_addr_v4);
1379 plugin->server_addr_v4 = NULL;
1383 plugin->server_addr_v4->sin_family = AF_INET;
1384 plugin->server_addr_v4->sin_port = htons (plugin->port);
1386 GNUNET_free (bind4_address);
1390 char *bind6_address = NULL;
1392 if ((plugin->ipv6 == GNUNET_YES) &&
1394 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1395 "BINDTO6", &bind6_address)))
1397 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1398 "Binding %s plugin to specific IPv6 address: `%s'\n",
1399 plugin->protocol, bind6_address);
1400 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1402 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1404 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1406 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1407 bind6_address, plugin->protocol);
1408 GNUNET_free (plugin->server_addr_v6);
1409 plugin->server_addr_v6 = NULL;
1413 plugin->server_addr_v6->sin6_family = AF_INET6;
1414 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1416 GNUNET_free (bind6_address);
1420 /* Optional parameters */
1421 unsigned long long maxneigh;
1424 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1425 "MAX_CONNECTIONS", &maxneigh))
1427 plugin->max_connections = maxneigh;
1434 * Entry point for the plugin.
1437 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1439 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1440 struct GNUNET_TRANSPORT_PluginFunctions *api;
1441 struct Plugin *plugin;
1444 if (NULL == env->receive)
1446 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1447 initialze the plugin or the API */
1448 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1450 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1451 api->address_to_string = &http_plugin_address_to_string;
1452 api->string_to_address = NULL; // FIXME!
1456 plugin = GNUNET_malloc (sizeof (struct Plugin));
1458 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1460 api->disconnect = &http_plugin_disconnect;
1461 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1462 api->check_address = &http_plugin_address_suggested;
1463 api->address_to_string = &http_plugin_address_to_string;
1464 api->string_to_address = &http_string_to_address;
1465 api->get_session = &http_get_session;
1466 api->send = &http_plugin_send;
1469 plugin->name = "transport-https";
1470 plugin->protocol = "https";
1472 plugin->name = "transport-http";
1473 plugin->protocol = "http";
1475 /* Configure plugin from configuration */
1476 res = configure_plugin (plugin);
1477 if (res == GNUNET_SYSERR)
1479 GNUNET_free_non_null (plugin->server_addr_v4);
1480 GNUNET_free_non_null (plugin->server_addr_v6);
1481 GNUNET_free (plugin);
1486 /* checking IPv6 support */
1487 http_check_ipv6 (plugin);
1490 res = client_start (plugin);
1491 if (res == GNUNET_SYSERR)
1493 GNUNET_free_non_null (plugin->server_addr_v4);
1494 GNUNET_free_non_null (plugin->server_addr_v6);
1495 GNUNET_free (plugin);
1501 if (plugin->client_only == GNUNET_NO)
1503 res = server_start (plugin);
1504 if (res == GNUNET_SYSERR)
1506 server_stop (plugin);
1507 client_stop (plugin);
1509 GNUNET_free_non_null (plugin->server_addr_v4);
1510 GNUNET_free_non_null (plugin->server_addr_v6);
1511 GNUNET_free (plugin);
1516 /* Report addresses to transport service */
1517 start_report_addresses (plugin);
1520 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1521 "Plugin `%s' loaded\n", plugin->name);
1529 * Exit point from the plugin.
1532 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1534 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1535 struct Plugin *plugin = api->cls;
1544 /* Stop reporting addresses to transport service */
1545 stop_report_addresses (plugin);
1547 /* cleaning up sessions */
1552 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1553 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1555 if (s->inbound == GNUNET_NO)
1556 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1558 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1563 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1566 server_stop (plugin);
1569 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1572 client_stop (plugin);
1574 /* deleting up sessions */
1578 struct Session *t = s->next;
1580 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1582 struct HTTP_Message *msg = s->msg_head;
1583 struct HTTP_Message *tmp = NULL;
1589 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1590 if (msg->transmit_cont != NULL)
1592 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1604 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1605 "Plugin `%s' unloaded\n", plugin->name);
1608 GNUNET_free_non_null (plugin->server_addr_v4);
1609 GNUNET_free_non_null (plugin->server_addr_v6);
1610 GNUNET_free (plugin);
1616 /* end of plugin_transport_http.c */