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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
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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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))
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))
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 (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
390 struct Session *session, const void *addr, size_t addrlen,
393 struct Session *s = NULL;
394 struct Session *t = NULL;
404 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
405 "Comparing peer `%s' address `%s' len %i session %X to \n",
406 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
408 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
409 "peer `%s' address `%s' len %i session %X \n\n",
410 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
412 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
413 memcmp (addr, t->addr, addrlen));
418 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
421 if (addrlen == t->addrlen)
423 if (0 == memcmp (addr, t->addr, addrlen))
430 if (t->addrlen == session->addrlen)
432 if (0 == memcmp (session->addr, t->addr, t->addrlen))
440 if ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO))
445 if ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) &&
446 (e_addr == GNUNET_YES))
451 if ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR))
466 delete_session (struct Session *s)
468 if (s->msg_tk != NULL)
470 GNUNET_SERVER_mst_destroy (s->msg_tk);
473 GNUNET_free (s->addr);
474 GNUNET_free_non_null (s->server_recv);
475 GNUNET_free_non_null (s->server_send);
480 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
481 const void *addr, size_t addrlen,
482 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
484 struct Session *s = NULL;
486 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
487 (addrlen == sizeof (struct IPv4HttpAddress)));
488 s = GNUNET_malloc (sizeof (struct Session));
489 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
491 s->addr = GNUNET_malloc (addrlen);
492 memcpy (s->addr, addr, addrlen);
493 s->addrlen = addrlen;
495 s->next_receive = GNUNET_TIME_absolute_get_zero ();
496 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
501 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
504 struct Plugin *plugin = cls;
506 plugin->env->session_end (plugin->env->cls, peer, s);
507 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
513 * Function that can be used by the transport service to transmit
514 * a message using the plugin. Note that in the case of a
515 * peer disconnecting, the continuation MUST be called
516 * prior to the disconnect notification itself. This function
517 * will be called with this peer's HELLO message to initiate
518 * a fresh connection to another peer.
521 * @param target who should receive this message
522 * @param msgbuf the message to transmit
523 * @param msgbuf_size number of bytes in 'msgbuf'
524 * @param priority how important is the message (most plugins will
525 * ignore message priority and just FIFO)
526 * @param to how long to wait at most for the transmission (does not
527 * require plugins to discard the message after the timeout,
528 * just advisory for the desired delay; most plugins will ignore
530 * @param session which session must be used (or NULL for "any")
531 * @param addr the address to use (can be NULL if the plugin
532 * is "on its own" (i.e. re-use existing TCP connection))
533 * @param addrlen length of the address in bytes
534 * @param force_address GNUNET_YES if the plugin MUST use the given address,
535 * GNUNET_NO means the plugin may use any other address and
536 * GNUNET_SYSERR means that only reliable existing
537 * bi-directional connections should be used (regardless
539 * @param cont continuation to call once the message has
540 * been transmitted (or if the transport is ready
541 * for the next transmission call; or if the
542 * peer disconnected...); can be NULL
543 * @param cont_cls closure for cont
544 * @return number of bytes used (on the physical network, with overheads);
545 * -1 on hard errors (i.e. address invalid); 0 is a legal value
546 * and does NOT mean that the message was not transmitted (DV)
549 http_plugin_send (void *cls, const struct GNUNET_PeerIdentity *target,
550 const char *msgbuf, size_t msgbuf_size, unsigned int priority,
551 struct GNUNET_TIME_Relative to, struct Session *session,
552 const void *addr, size_t addrlen, int force_address,
553 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
555 struct Plugin *plugin = cls;
556 struct HTTP_Message *msg;
559 GNUNET_assert (plugin != NULL);
561 int res = GNUNET_SYSERR;
564 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
565 "Sending %u bytes to peer `%s' on address `%s' %X %i\n",
566 msgbuf_size, GNUNET_i2s (target), ((addr != NULL) &&
569 http_plugin_address_to_string (plugin, addr,
570 addrlen) : "<inbound>",
571 session, force_address);
577 GNUNET_assert ((addrlen == sizeof (struct IPv4HttpAddress)) ||
578 (addrlen == sizeof (struct IPv6HttpAddress)));
581 /* look for existing connection */
582 s = lookup_session (plugin, target, session, addr, addrlen, 1);
584 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
585 "%s existing session: %s\n",
586 (s != NULL) ? "Found" : "NOT Found", ((s != NULL) &&
589 "inbound" : "outbound");
592 /* create new outbound connection */
595 if (plugin->max_connections <= plugin->cur_connections)
597 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
598 "Maximum number of connections reached, "
599 "cannot connect to peer `%s'\n", GNUNET_i2s (target));
604 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
605 "Initiiating new connection to peer `%s'\n",
606 GNUNET_i2s (target));
609 struct GNUNET_ATS_Information ats;
610 if (addrlen == sizeof (struct IPv4HttpAddress))
612 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
613 struct sockaddr_in s4;
615 s4.sin_family = AF_INET;
616 s4.sin_addr.s_addr = a4->ipv4_addr;
617 s4.sin_port = a4->u4_port;
618 #if HAVE_SOCKADDR_IN_SIN_LEN
619 s4.sin_len = sizeof (struct sockaddr_in);
621 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
623 if ((ntohs (a4->u4_port) == 0) || (plugin->ipv4 == GNUNET_NO))
626 if (addrlen == sizeof (struct IPv6HttpAddress))
628 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
629 struct sockaddr_in6 s6;
631 s6.sin6_family = AF_INET6;
632 s6.sin6_addr = a6->ipv6_addr;
633 s6.sin6_port = a6->u6_port;
634 #if HAVE_SOCKADDR_IN_SIN_LEN
635 s6.sin6_len = sizeof (struct sockaddr_in6);
637 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
639 if ((ntohs (a6->u6_port) == 0) || (plugin->ipv6 == GNUNET_NO))
642 if (res == GNUNET_OK)
644 s = create_session (plugin, target, addr, addrlen, cont, cont_cls);
645 s->ats_address_network_type = ats.value;
646 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
647 // initiate new connection
648 res = client_connect (s);
650 if (res == GNUNET_SYSERR)
654 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
657 return GNUNET_SYSERR;
661 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
663 msg->size = msgbuf_size;
665 msg->buf = (char *) &msg[1];
666 msg->transmit_cont = cont;
667 msg->transmit_cont_cls = cont_cls;
668 memcpy (msg->buf, msgbuf, msgbuf_size);
670 if (s->inbound == GNUNET_NO)
673 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
674 "Using outbound client session %p to send to `%s'\n", s,
675 GNUNET_i2s (target));
678 client_send (s, msg);
681 if (s->inbound == GNUNET_YES)
684 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
685 "Using inbound server %p session to send to `%s'\n", s,
686 GNUNET_i2s (target));
689 server_send (s, msg);
697 * Function that can be used to force the plugin to disconnect
698 * from the given peer and cancel all previous transmissions
699 * (and their continuationc).
702 * @param target peer from which to disconnect
705 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
707 struct Plugin *plugin = cls;
708 struct Session *next = NULL;
709 struct Session *s = plugin->head;
711 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
712 "Transport tells me to disconnect `%s'\n",
713 GNUNET_i2s (target));
717 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
719 if (s->inbound == GNUNET_NO)
720 GNUNET_assert (GNUNET_OK == client_disconnect (s));
722 GNUNET_assert (GNUNET_OK == server_disconnect (s));
723 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
725 struct HTTP_Message *msg = s->msg_head;
726 struct HTTP_Message *tmp = s->msg_head;
732 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
733 if (msg->transmit_cont != NULL)
735 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
748 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
751 struct Plugin *plugin = cls;
752 struct IPv4HttpAddressWrapper *w_t4 = NULL;
753 struct IPv6HttpAddressWrapper *w_t6 = NULL;
756 af = addr->sa_family;
760 w_t4 = plugin->ipv4_addr_head;
761 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
765 int res = memcmp (&w_t4->addr.ipv4_addr,
767 sizeof (struct in_addr));
771 if (a4->sin_port != w_t4->addr.u4_port)
781 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
782 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
783 w_t4->addr.u4_port = a4->sin_port;
785 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
786 plugin->ipv4_addr_tail, w_t4);
789 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
790 "Notifying transport to add IPv4 address `%s'\n",
791 http_plugin_address_to_string (NULL, &w_t4->addr,
795 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
796 sizeof (struct IPv4HttpAddress));
800 w_t6 = plugin->ipv6_addr_head;
801 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
805 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
806 sizeof (struct in6_addr));
810 if (a6->sin6_port != w_t6->addr6.u6_port)
819 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
821 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
822 w_t6->addr6.u6_port = a6->sin6_port;
824 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
825 plugin->ipv6_addr_tail, w_t6);
828 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
829 "Notifying transport to add IPv6 address `%s'\n",
830 http_plugin_address_to_string (NULL, &w_t6->addr6,
834 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
835 sizeof (struct IPv6HttpAddress));
844 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
847 struct Plugin *plugin = cls;
848 struct IPv4HttpAddressWrapper *w_t4 = NULL;
849 struct IPv6HttpAddressWrapper *w_t6 = NULL;
852 af = addr->sa_family;
856 w_t4 = plugin->ipv4_addr_head;
857 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
861 int res = memcmp (&w_t4->addr.ipv4_addr,
863 sizeof (struct in_addr));
867 if (a4->sin_port != w_t4->addr.u4_port)
879 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
880 "Notifying transport to remove IPv4 address `%s'\n",
881 http_plugin_address_to_string (NULL, &w_t4->addr,
885 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
886 sizeof (struct IPv4HttpAddress));
888 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
893 w_t6 = plugin->ipv6_addr_head;
894 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
898 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
899 sizeof (struct in6_addr));
903 if (a6->sin6_port != w_t6->addr6.u6_port)
913 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
914 "Notifying transport to remove IPv6 address `%s'\n",
915 http_plugin_address_to_string (NULL, &w_t6->addr6,
919 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
920 sizeof (struct IPv6HttpAddress));
922 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
933 * Our external IP address/port mapping has changed.
935 * @param cls closure, the 'struct LocalAddrList'
936 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
937 * the previous (now invalid) one
938 * @param addr either the previous or the new public IP address
939 * @param addrlen actual lenght of the address
942 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
945 GNUNET_assert (cls != NULL);
947 struct Plugin *plugin = cls;
950 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
951 "NPMC called %s to address `%s'\n",
952 (add_remove == GNUNET_NO) ? "remove" : "add",
953 GNUNET_a2s (addr, addrlen));
958 nat_add_address (cls, add_remove, addr, addrlen);
961 nat_remove_address (cls, add_remove, addr, addrlen);
967 http_check_ipv6 (struct Plugin *plugin)
969 struct GNUNET_NETWORK_Handle *desc = NULL;
971 if (plugin->ipv6 == GNUNET_YES)
973 /* probe IPv6 support */
974 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
977 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
980 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
982 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
984 ("Disabling IPv6 since it is not supported on this system!\n"));
985 plugin->ipv6 = GNUNET_NO;
989 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
993 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
994 "Testing IPv6 on this system: %s\n",
995 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
1000 http_get_addresses (struct Plugin *plugin, const char *serviceName,
1001 const struct GNUNET_CONFIGURATION_Handle *cfg,
1002 struct sockaddr ***addrs, socklen_t ** addr_lens)
1005 unsigned long long port;
1006 struct addrinfo hints;
1007 struct addrinfo *res;
1008 struct addrinfo *pos;
1009 struct addrinfo *next;
1013 struct sockaddr **saddrs;
1014 socklen_t *saddrlens;
1020 disablev6 = !plugin->ipv6;
1023 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
1025 GNUNET_break (GNUNET_OK ==
1026 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
1030 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1032 ("Require valid port number for service in configuration!\n"));
1033 return GNUNET_SYSERR;
1037 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1039 GNUNET_break (GNUNET_OK ==
1040 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1041 "BINDTO", &hostname));
1046 if (hostname != NULL)
1048 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1049 "Resolving `%s' since that is where `%s' will bind to.\n",
1050 hostname, serviceName);
1051 memset (&hints, 0, sizeof (struct addrinfo));
1053 hints.ai_family = AF_INET;
1054 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1057 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1058 hostname, gai_strerror (ret));
1059 GNUNET_free (hostname);
1060 return GNUNET_SYSERR;
1064 while (NULL != (pos = next))
1066 next = pos->ai_next;
1067 if ((disablev6) && (pos->ai_family == AF_INET6))
1073 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1074 _("Failed to find %saddress for `%s'.\n"),
1075 disablev6 ? "IPv4 " : "", hostname);
1077 GNUNET_free (hostname);
1078 return GNUNET_SYSERR;
1081 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1082 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1085 while (NULL != (pos = next))
1087 next = pos->ai_next;
1088 if ((disablev6) && (pos->ai_family == AF_INET6))
1090 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1091 continue; /* not TCP */
1092 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1093 continue; /* huh? */
1094 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1095 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1097 if (pos->ai_family == AF_INET)
1099 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1100 saddrlens[i] = pos->ai_addrlen;
1101 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1102 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1103 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1107 GNUNET_assert (pos->ai_family == AF_INET6);
1108 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1109 saddrlens[i] = pos->ai_addrlen;
1110 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1111 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1112 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1116 GNUNET_free (hostname);
1122 /* will bind against everything, just set port */
1128 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1129 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1131 saddrlens[i] = sizeof (struct sockaddr_in);
1132 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1133 #if HAVE_SOCKADDR_IN_SIN_LEN
1134 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1136 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1137 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1143 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1144 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1146 saddrlens[i] = sizeof (struct sockaddr_in6);
1147 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1148 #if HAVE_SOCKADDR_IN_SIN_LEN
1149 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1151 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1152 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1154 saddrlens[i] = sizeof (struct sockaddr_in);
1155 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1156 #if HAVE_SOCKADDR_IN_SIN_LEN
1157 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1159 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1160 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1164 *addr_lens = saddrlens;
1169 start_report_addresses (struct Plugin *plugin)
1171 int res = GNUNET_OK;
1172 struct sockaddr **addrs;
1173 socklen_t *addrlens;
1176 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1178 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1179 _("Found %u addresses to report to NAT service\n"), res);
1181 if (res != GNUNET_SYSERR)
1184 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1186 (const struct sockaddr **) addrs, addrlens,
1187 &nat_port_map_callback, NULL, plugin);
1192 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1193 GNUNET_a2s (addrs[res], addrlens[res]));
1195 GNUNET_assert (addrs[res] != NULL);
1196 GNUNET_free (addrs[res]);
1198 GNUNET_free_non_null (addrs);
1199 GNUNET_free_non_null (addrlens);
1204 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1205 NULL, NULL, plugin);
1210 stop_report_addresses (struct Plugin *plugin)
1212 /* Stop NAT handle */
1213 GNUNET_NAT_unregister (plugin->nat);
1215 /* Clean up addresses */
1216 struct IPv4HttpAddressWrapper *w_t4;
1217 struct IPv6HttpAddressWrapper *w_t6;
1219 while (plugin->ipv4_addr_head != NULL)
1221 w_t4 = plugin->ipv4_addr_head;
1222 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1227 while (plugin->ipv6_addr_head != NULL)
1229 w_t6 = plugin->ipv6_addr_head;
1230 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1237 configure_plugin (struct Plugin *plugin)
1239 int res = GNUNET_OK;
1242 if (GNUNET_CONFIGURATION_have_value
1243 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1246 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1250 plugin->ipv4 = GNUNET_YES;
1253 if (GNUNET_CONFIGURATION_have_value
1254 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1257 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1261 plugin->ipv6 = GNUNET_YES;
1263 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1265 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1267 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1269 res = GNUNET_SYSERR;
1272 /* Reading port number from config file */
1273 unsigned long long port;
1276 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1277 "PORT", &port)) || (port > 65535))
1279 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1280 _("Port is required! Fix in configuration\n"),
1282 res = GNUNET_SYSERR;
1285 plugin->port = port;
1287 plugin->client_only = GNUNET_NO;
1288 if (plugin->port == 0)
1290 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1291 _("Port 0, client only mode\n"));
1292 plugin->client_only = GNUNET_YES;
1295 char *bind4_address = NULL;
1297 if ((plugin->ipv4 == GNUNET_YES) &&
1299 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1300 "BINDTO", &bind4_address)))
1302 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1303 "Binding %s plugin to specific IPv4 address: `%s'\n",
1304 plugin->protocol, bind4_address);
1305 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1307 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1309 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1311 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1312 bind4_address, plugin->protocol);
1313 GNUNET_free (plugin->server_addr_v4);
1314 plugin->server_addr_v4 = NULL;
1318 plugin->server_addr_v4->sin_family = AF_INET;
1319 plugin->server_addr_v4->sin_port = htons (plugin->port);
1321 GNUNET_free (bind4_address);
1325 char *bind6_address = NULL;
1327 if ((plugin->ipv6 == GNUNET_YES) &&
1329 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1330 "BINDTO6", &bind6_address)))
1332 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1333 "Binding %s plugin to specific IPv6 address: `%s'\n",
1334 plugin->protocol, bind6_address);
1335 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1337 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1339 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1341 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1342 bind6_address, plugin->protocol);
1343 GNUNET_free (plugin->server_addr_v6);
1344 plugin->server_addr_v6 = NULL;
1348 plugin->server_addr_v6->sin6_family = AF_INET6;
1349 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1351 GNUNET_free (bind6_address);
1355 /* Optional parameters */
1356 unsigned long long maxneigh;
1359 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1360 "MAX_CONNECTIONS", &maxneigh))
1362 plugin->max_connections = maxneigh;
1369 * Entry point for the plugin.
1372 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1374 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1375 struct GNUNET_TRANSPORT_PluginFunctions *api;
1376 struct Plugin *plugin;
1379 plugin = GNUNET_malloc (sizeof (struct Plugin));
1381 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1383 api->send = &http_plugin_send;
1384 api->disconnect = &http_plugin_disconnect;
1385 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1386 api->check_address = &http_plugin_address_suggested;
1387 api->address_to_string = &http_plugin_address_to_string;
1390 plugin->name = "transport-https";
1391 plugin->protocol = "https";
1393 plugin->name = "transport-http";
1394 plugin->protocol = "http";
1396 /* Configure plugin from configuration */
1397 res = configure_plugin (plugin);
1398 if (res == GNUNET_SYSERR)
1400 GNUNET_free_non_null (plugin->server_addr_v4);
1401 GNUNET_free_non_null (plugin->server_addr_v6);
1402 GNUNET_free (plugin);
1407 /* checking IPv6 support */
1408 http_check_ipv6 (plugin);
1411 res = client_start (plugin);
1412 if (res == GNUNET_SYSERR)
1414 GNUNET_free_non_null (plugin->server_addr_v4);
1415 GNUNET_free_non_null (plugin->server_addr_v6);
1416 GNUNET_free (plugin);
1422 if (plugin->client_only == GNUNET_NO)
1424 res = server_start (plugin);
1425 if (res == GNUNET_SYSERR)
1427 server_stop (plugin);
1428 client_stop (plugin);
1430 GNUNET_free_non_null (plugin->server_addr_v4);
1431 GNUNET_free_non_null (plugin->server_addr_v6);
1432 GNUNET_free (plugin);
1437 /* Report addresses to transport service */
1438 start_report_addresses (plugin);
1441 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1442 "Plugin `%s' loaded\n", plugin->name);
1450 * Exit point from the plugin.
1453 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1455 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1456 struct Plugin *plugin = api->cls;
1457 struct Session *s = NULL;
1459 /* Stop reporting addresses to transport service */
1460 stop_report_addresses (plugin);
1462 /* cleaning up sessions */
1467 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1468 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1470 if (s->inbound == GNUNET_NO)
1471 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1473 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1478 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1481 server_stop (plugin);
1484 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1487 client_stop (plugin);
1489 /* deleting up sessions */
1493 struct Session *t = s->next;
1495 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1497 struct HTTP_Message *msg = s->msg_head;
1498 struct HTTP_Message *tmp = s->msg_head;
1504 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1505 if (msg->transmit_cont != NULL)
1507 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1519 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1520 "Plugin `%s' unloaded\n", plugin->name);
1523 GNUNET_free_non_null (plugin->server_addr_v4);
1524 GNUNET_free_non_null (plugin->server_addr_v6);
1525 GNUNET_free (plugin);
1531 /* end of plugin_transport_http.c */