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.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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;
353 if ((addr == NULL) || (addrlen == 0) || (buf == NULL))
354 return GNUNET_SYSERR;
356 /* protocoll + "://" + ":" */
357 if (addrlen <= (strlen (protocol) + 4))
359 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
360 "Invalid address string `%s' to convert to address\n",
363 return GNUNET_SYSERR;
366 if (NULL == (addr_str = strstr(addr, "://")))
368 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
369 "Invalid address string `%s' to convert to address\n",
372 return GNUNET_SYSERR;
374 addr_str = &addr_str[3];
376 if (addr_str[strlen(addr_str)-1] == '/')
377 addr_str[strlen(addr_str)-1] = '\0';
379 if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv4(addr_str, strlen(addr_str), &addr_4))
381 http_4addr = GNUNET_malloc (sizeof (struct IPv4HttpAddress));
382 http_4addr->u4_port = addr_4.sin_port;
383 http_4addr->ipv4_addr = (uint32_t) addr_4.sin_addr.s_addr;
385 (*added) = sizeof (struct IPv4HttpAddress);
388 else if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv6(addr_str, strlen(addr_str), &addr_6))
390 http_6addr = GNUNET_malloc (sizeof (struct IPv6HttpAddress));
391 http_6addr->u6_port = addr_6.sin6_port;
392 http_6addr->ipv6_addr = addr_6.sin6_addr;
394 (*added) = sizeof (struct IPv6HttpAddress);
399 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
400 "Invalid address string `%s' to convert to address\n",
403 return GNUNET_SYSERR;
410 * Function called for a quick conversion of the binary address to
411 * a numeric address. Note that the caller must not free the
412 * address and that the next call to this function is allowed
413 * to override the address again.
416 * @param addr binary address
417 * @param addrlen length of the address
418 * @return string representing the same address
421 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
424 struct IPv4HttpAddress *a4;
425 struct IPv6HttpAddress *a6;
427 static char rbuf[INET6_ADDRSTRLEN + 13];
431 if (addrlen == sizeof (struct IPv6HttpAddress))
433 a6 = (struct IPv6HttpAddress *) addr;
434 address = GNUNET_malloc (INET6_ADDRSTRLEN);
435 GNUNET_assert (NULL !=
436 inet_ntop (AF_INET6, &a6->ipv6_addr, address,
438 port = ntohs (a6->u6_port);
440 else if (addrlen == sizeof (struct IPv4HttpAddress))
442 a4 = (struct IPv4HttpAddress *) addr;
443 address = GNUNET_malloc (INET_ADDRSTRLEN);
444 GNUNET_assert (NULL !=
445 inet_ntop (AF_INET, &(a4->ipv4_addr), address,
447 port = ntohs (a4->u4_port);
451 /* invalid address */
456 char *protocol = "http";
458 char *protocol = "https";
461 GNUNET_assert (strlen (address) + 7 < (INET6_ADDRSTRLEN + 13));
462 if (addrlen == sizeof (struct IPv6HttpAddress))
464 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol,
466 else if (addrlen == sizeof (struct IPv4HttpAddress))
468 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, address,
471 GNUNET_free (address);
472 GNUNET_assert (res != 0);
477 lookup_session_old (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
478 struct Session *session, const void *addr, size_t addrlen,
485 for (t = plugin->head; NULL != t; t = t->next)
488 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
489 "Comparing peer `%s' address `%s' len %i session %X to \n",
490 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
492 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
493 "peer `%s' address `%s' len %i session %X \n\n",
494 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
496 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
497 memcmp (addr, t->addr, addrlen));
501 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
504 if ( (addrlen == t->addrlen) &&
505 (0 == memcmp (addr, t->addr, addrlen)) )
507 if ( (t == session) &&
508 (t->addrlen == session->addrlen) &&
509 (0 == memcmp (session->addr, t->addr, t->addrlen)) )
513 if ( ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO)) ||
514 ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) && (e_addr == GNUNET_YES)) ||
515 ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR)) )
522 lookup_session (struct Plugin *plugin,
523 const struct GNUNET_HELLO_Address *address)
527 for (pos = plugin->head; NULL != pos; pos = pos->next)
528 if ( (0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
529 (address->address_length == pos->addrlen) &&
530 (0 == memcmp (address->address, pos->addr, pos->addrlen)) )
536 exist_session (struct Plugin *plugin, struct Session *s)
538 struct Session * head;
540 GNUNET_assert (NULL != plugin);
541 GNUNET_assert (NULL != s);
543 for (head = plugin->head; head != NULL; head = head->next)
554 delete_session (struct Session *s)
556 if (s->msg_tk != NULL)
558 GNUNET_SERVER_mst_destroy (s->msg_tk);
561 GNUNET_free (s->addr);
562 GNUNET_free_non_null (s->server_recv);
563 GNUNET_free_non_null (s->server_send);
568 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
569 const void *addr, size_t addrlen,
570 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
572 struct Session *s = NULL;
574 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
575 (addrlen == sizeof (struct IPv4HttpAddress)));
576 s = GNUNET_malloc (sizeof (struct Session));
577 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
579 s->addr = GNUNET_malloc (addrlen);
580 memcpy (s->addr, addr, addrlen);
581 s->addrlen = addrlen;
583 s->next_receive = GNUNET_TIME_absolute_get_zero ();
584 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
589 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
592 struct Plugin *plugin = cls;
594 plugin->env->session_end (plugin->env->cls, peer, s);
595 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
600 * Creates a new outbound session the transport service will use to send data to the
603 * @param cls the plugin
604 * @param address the address
605 * @return the session or NULL of max connections exceeded
608 static struct Session *
609 http_get_session (void *cls,
610 const struct GNUNET_HELLO_Address *address)
612 struct Plugin *plugin = cls;
613 struct Session * s = NULL;
614 struct GNUNET_ATS_Information ats;
617 GNUNET_assert (plugin != NULL);
618 GNUNET_assert (address != NULL);
619 GNUNET_assert (address->address != NULL);
621 ats.type = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
622 ats.value = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
624 /* find existing session */
625 s = lookup_session (plugin, address);
629 if (plugin->max_connections <= plugin->cur_connections)
631 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
632 "Maximum number of connections reached, "
633 "cannot connect to peer `%s'\n", GNUNET_i2s (&address->peer));
637 /* create new session */
638 addrlen = address->address_length;
640 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
641 (addrlen == sizeof (struct IPv4HttpAddress)));
643 s = GNUNET_malloc (sizeof (struct Session));
644 memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
646 s->addr = GNUNET_malloc (address->address_length);
647 memcpy (s->addr, address->address, address->address_length);
648 s->addrlen = addrlen;
650 s->next_receive = GNUNET_TIME_absolute_get_zero ();
651 s->inbound = GNUNET_NO;
652 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
655 if (addrlen == sizeof (struct IPv4HttpAddress))
657 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) address->address;
658 struct sockaddr_in s4;
660 s4.sin_family = AF_INET;
661 s4.sin_addr.s_addr = a4->ipv4_addr;
662 s4.sin_port = a4->u4_port;
663 #if HAVE_SOCKADDR_IN_SIN_LEN
664 s4.sin_len = sizeof (struct sockaddr_in);
666 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
668 if (addrlen == sizeof (struct IPv6HttpAddress))
670 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) address->address;
671 struct sockaddr_in6 s6;
673 s6.sin6_family = AF_INET6;
674 s6.sin6_addr = a6->ipv6_addr;
675 s6.sin6_port = a6->u6_port;
676 #if HAVE_SOCKADDR_IN_SIN_LEN
677 s6.sin6_len = sizeof (struct sockaddr_in6);
679 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
681 s->ats_address_network_type = ats.value;
683 /* add new session */
684 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
685 /* initiate new connection */
686 if (GNUNET_SYSERR == client_connect (s))
688 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
689 "Cannot connect to peer `%s' address `%s''\n",
690 http_plugin_address_to_string(NULL, s->addr, s->addrlen),
691 GNUNET_i2s (&s->target));
692 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
701 * Function that can be used by the transport service to transmit
702 * a message using the plugin. Note that in the case of a
703 * peer disconnecting, the continuation MUST be called
704 * prior to the disconnect notification itself. This function
705 * will be called with this peer's HELLO message to initiate
706 * a fresh connection to another peer.
709 * @param session which session must be used
710 * @param msgbuf the message to transmit
711 * @param msgbuf_size number of bytes in 'msgbuf'
712 * @param priority how important is the message (most plugins will
713 * ignore message priority and just FIFO)
714 * @param to how long to wait at most for the transmission (does not
715 * require plugins to discard the message after the timeout,
716 * just advisory for the desired delay; most plugins will ignore
718 * @param cont continuation to call once the message has
719 * been transmitted (or if the transport is ready
720 * for the next transmission call; or if the
721 * peer disconnected...); can be NULL
722 * @param cont_cls closure for cont
723 * @return number of bytes used (on the physical network, with overheads);
724 * -1 on hard errors (i.e. address invalid); 0 is a legal value
725 * and does NOT mean that the message was not transmitted (DV)
728 http_plugin_send (void *cls,
729 struct Session *session,
730 const char *msgbuf, size_t msgbuf_size,
731 unsigned int priority,
732 struct GNUNET_TIME_Relative to,
733 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
735 struct Plugin *plugin = cls;
736 struct HTTP_Message *msg;
740 GNUNET_assert (plugin != NULL);
741 GNUNET_assert (session != NULL);
743 /* lookup if session is really existing */
747 if ((tmp == session) &&
748 (0 == memcmp (&session->target, &tmp->target, sizeof (struct GNUNET_PeerIdentity))) &&
749 (session->addrlen == tmp->addrlen) &&
750 (0 == memcmp (session->addr, tmp->addr, tmp->addrlen)))
760 /* create new message and schedule */
762 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
764 msg->size = msgbuf_size;
766 msg->buf = (char *) &msg[1];
767 msg->transmit_cont = cont;
768 msg->transmit_cont_cls = cont_cls;
769 memcpy (msg->buf, msgbuf, msgbuf_size);
771 if (session->inbound == GNUNET_NO)
774 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
775 "Using outbound client session %p to send to `%session'\n", session,
776 GNUNET_i2s (&session->target));
779 client_send (session, msg);
782 if (session->inbound == GNUNET_YES)
785 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
786 "Using inbound server %p session to send to `%session'\n", session,
787 GNUNET_i2s (&session->target));
790 server_send (session, msg);
799 * Function that can be used to force the plugin to disconnect
800 * from the given peer and cancel all previous transmissions
801 * (and their continuationc).
804 * @param target peer from which to disconnect
807 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
809 struct Plugin *plugin = cls;
810 struct Session *next = NULL;
811 struct Session *s = plugin->head;
813 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
814 "Transport tells me to disconnect `%s'\n",
815 GNUNET_i2s (target));
819 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
821 if (s->inbound == GNUNET_NO)
822 GNUNET_assert (GNUNET_OK == client_disconnect (s));
824 GNUNET_assert (GNUNET_OK == server_disconnect (s));
825 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
827 struct HTTP_Message *msg = s->msg_head;
828 struct HTTP_Message *tmp = NULL;
834 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
835 if (msg->transmit_cont != NULL)
837 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
850 find_address (struct Plugin *plugin, const struct sockaddr *addr, socklen_t addrlen)
853 struct IPv4HttpAddressWrapper *w_t4 = NULL;
854 struct IPv6HttpAddressWrapper *w_t6 = NULL;
856 af = addr->sa_family;
860 w_t4 = plugin->ipv4_addr_head;
861 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
865 int res = memcmp (&w_t4->addr.ipv4_addr,
867 sizeof (struct in_addr));
871 if (a4->sin_port != w_t4->addr.u4_port)
882 w_t6 = plugin->ipv6_addr_head;
883 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
887 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
888 sizeof (struct in6_addr));
892 if (a6->sin6_port != w_t6->addr6.u6_port)
908 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
911 struct Plugin *plugin = cls;
912 struct IPv4HttpAddressWrapper *w_t4 = NULL;
913 struct IPv6HttpAddressWrapper *w_t6 = NULL;
916 af = addr->sa_family;
920 w_t4 = find_address (plugin, addr, addrlen);
923 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
924 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
925 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
926 w_t4->addr.u4_port = a4->sin_port;
928 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
929 plugin->ipv4_addr_tail, w_t4);
931 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
932 "Notifying transport to add IPv4 address `%s'\n",
933 http_plugin_address_to_string (NULL, &w_t4->addr,
936 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
937 sizeof (struct IPv4HttpAddress));
941 w_t6 = find_address (plugin, addr, addrlen);
944 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
945 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
946 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
947 w_t6->addr6.u6_port = a6->sin6_port;
949 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
950 plugin->ipv6_addr_tail, w_t6);
952 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
953 "Notifying transport to add IPv6 address `%s'\n",
954 http_plugin_address_to_string (NULL, &w_t6->addr6,
957 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
958 sizeof (struct IPv6HttpAddress));
968 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
971 struct Plugin *plugin = cls;
972 struct IPv4HttpAddressWrapper *w_t4 = NULL;
973 struct IPv6HttpAddressWrapper *w_t6 = NULL;
976 af = addr->sa_family;
980 w_t4 = find_address (plugin, addr, addrlen);
985 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
986 "Notifying transport to remove IPv4 address `%s'\n",
987 http_plugin_address_to_string (NULL, &w_t4->addr,
990 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
991 sizeof (struct IPv4HttpAddress));
993 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
998 w_t6 = find_address (plugin, addr, addrlen);
1002 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1003 "Notifying transport to remove IPv6 address `%s'\n",
1004 http_plugin_address_to_string (NULL, &w_t6->addr6,
1008 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
1009 sizeof (struct IPv6HttpAddress));
1011 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1022 * Our external IP address/port mapping has changed.
1024 * @param cls closure, the 'struct LocalAddrList'
1025 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1026 * the previous (now invalid) one
1027 * @param addr either the previous or the new public IP address
1028 * @param addrlen actual lenght of the address
1031 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
1034 GNUNET_assert (cls != NULL);
1035 struct Plugin *plugin = cls;
1037 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1038 "NPMC called %s to address `%s'\n",
1039 (add_remove == GNUNET_NO) ? "remove" : "add",
1040 GNUNET_a2s (addr, addrlen));
1045 nat_add_address (cls, add_remove, addr, addrlen);
1048 nat_remove_address (cls, add_remove, addr, addrlen);
1054 http_check_ipv6 (struct Plugin *plugin)
1056 struct GNUNET_NETWORK_Handle *desc = NULL;
1058 if (plugin->ipv6 == GNUNET_YES)
1060 /* probe IPv6 support */
1061 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
1064 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
1067 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1069 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
1071 ("Disabling IPv6 since it is not supported on this system!\n"));
1072 plugin->ipv6 = GNUNET_NO;
1076 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
1080 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1081 "Testing IPv6 on this system: %s\n",
1082 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
1087 http_get_addresses (struct Plugin *plugin, const char *serviceName,
1088 const struct GNUNET_CONFIGURATION_Handle *cfg,
1089 struct sockaddr ***addrs, socklen_t ** addr_lens)
1092 unsigned long long port;
1093 struct addrinfo hints;
1094 struct addrinfo *res;
1095 struct addrinfo *pos;
1096 struct addrinfo *next;
1100 struct sockaddr **saddrs;
1101 socklen_t *saddrlens;
1107 disablev6 = !plugin->ipv6;
1110 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
1112 GNUNET_break (GNUNET_OK ==
1113 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
1117 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1119 ("Require valid port number for service in configuration!\n"));
1120 return GNUNET_SYSERR;
1124 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1126 GNUNET_break (GNUNET_OK ==
1127 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1128 "BINDTO", &hostname));
1133 if (hostname != NULL)
1135 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1136 "Resolving `%s' since that is where `%s' will bind to.\n",
1137 hostname, serviceName);
1138 memset (&hints, 0, sizeof (struct addrinfo));
1140 hints.ai_family = AF_INET;
1141 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1144 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1145 hostname, gai_strerror (ret));
1146 GNUNET_free (hostname);
1147 return GNUNET_SYSERR;
1151 while (NULL != (pos = next))
1153 next = pos->ai_next;
1154 if ((disablev6) && (pos->ai_family == AF_INET6))
1160 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1161 _("Failed to find %saddress for `%s'.\n"),
1162 disablev6 ? "IPv4 " : "", hostname);
1164 GNUNET_free (hostname);
1165 return GNUNET_SYSERR;
1168 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1169 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1172 while (NULL != (pos = next))
1174 next = pos->ai_next;
1175 if ((disablev6) && (pos->ai_family == AF_INET6))
1177 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1178 continue; /* not TCP */
1179 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1180 continue; /* huh? */
1181 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1182 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1184 if (pos->ai_family == AF_INET)
1186 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1187 saddrlens[i] = pos->ai_addrlen;
1188 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1189 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1190 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1194 GNUNET_assert (pos->ai_family == AF_INET6);
1195 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1196 saddrlens[i] = pos->ai_addrlen;
1197 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1198 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1199 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1203 GNUNET_free (hostname);
1209 /* will bind against everything, just set port */
1215 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1216 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1218 saddrlens[i] = sizeof (struct sockaddr_in);
1219 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1220 #if HAVE_SOCKADDR_IN_SIN_LEN
1221 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1223 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1224 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1230 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1231 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1233 saddrlens[i] = sizeof (struct sockaddr_in6);
1234 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1235 #if HAVE_SOCKADDR_IN_SIN_LEN
1236 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1238 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1239 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1241 saddrlens[i] = sizeof (struct sockaddr_in);
1242 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1243 #if HAVE_SOCKADDR_IN_SIN_LEN
1244 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1246 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1247 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1251 *addr_lens = saddrlens;
1256 start_report_addresses (struct Plugin *plugin)
1258 int res = GNUNET_OK;
1259 struct sockaddr **addrs;
1260 socklen_t *addrlens;
1263 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1265 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1266 _("Found %u addresses to report to NAT service\n"), res);
1268 if (res != GNUNET_SYSERR)
1271 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1273 (const struct sockaddr **) addrs, addrlens,
1274 &nat_port_map_callback, NULL, plugin);
1279 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1280 GNUNET_a2s (addrs[res], addrlens[res]));
1282 GNUNET_assert (addrs[res] != NULL);
1283 GNUNET_free (addrs[res]);
1285 GNUNET_free_non_null (addrs);
1286 GNUNET_free_non_null (addrlens);
1291 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1292 NULL, NULL, plugin);
1297 stop_report_addresses (struct Plugin *plugin)
1299 /* Stop NAT handle */
1300 GNUNET_NAT_unregister (plugin->nat);
1302 /* Clean up addresses */
1303 struct IPv4HttpAddressWrapper *w_t4;
1304 struct IPv6HttpAddressWrapper *w_t6;
1306 while (plugin->ipv4_addr_head != NULL)
1308 w_t4 = plugin->ipv4_addr_head;
1309 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1314 while (plugin->ipv6_addr_head != NULL)
1316 w_t6 = plugin->ipv6_addr_head;
1317 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1324 configure_plugin (struct Plugin *plugin)
1326 int res = GNUNET_OK;
1329 if (GNUNET_CONFIGURATION_have_value
1330 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1333 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1337 plugin->ipv4 = GNUNET_YES;
1340 if (GNUNET_CONFIGURATION_have_value
1341 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1344 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1348 plugin->ipv6 = GNUNET_YES;
1350 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1352 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1354 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1356 res = GNUNET_SYSERR;
1359 /* Reading port number from config file */
1360 unsigned long long port;
1363 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1364 "PORT", &port)) || (port > 65535))
1366 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1367 _("Port is required! Fix in configuration\n"),
1369 res = GNUNET_SYSERR;
1372 plugin->port = port;
1374 plugin->client_only = GNUNET_NO;
1375 if (plugin->port == 0)
1377 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1378 _("Port 0, client only mode\n"));
1379 plugin->client_only = GNUNET_YES;
1382 char *bind4_address = NULL;
1384 if ((plugin->ipv4 == GNUNET_YES) &&
1386 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1387 "BINDTO", &bind4_address)))
1389 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1390 "Binding %s plugin to specific IPv4 address: `%s'\n",
1391 plugin->protocol, bind4_address);
1392 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1394 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1396 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1398 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1399 bind4_address, plugin->protocol);
1400 GNUNET_free (plugin->server_addr_v4);
1401 plugin->server_addr_v4 = NULL;
1405 plugin->server_addr_v4->sin_family = AF_INET;
1406 plugin->server_addr_v4->sin_port = htons (plugin->port);
1408 GNUNET_free (bind4_address);
1412 char *bind6_address = NULL;
1414 if ((plugin->ipv6 == GNUNET_YES) &&
1416 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1417 "BINDTO6", &bind6_address)))
1419 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1420 "Binding %s plugin to specific IPv6 address: `%s'\n",
1421 plugin->protocol, bind6_address);
1422 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1424 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1426 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1428 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1429 bind6_address, plugin->protocol);
1430 GNUNET_free (plugin->server_addr_v6);
1431 plugin->server_addr_v6 = NULL;
1435 plugin->server_addr_v6->sin6_family = AF_INET6;
1436 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1438 GNUNET_free (bind6_address);
1442 /* Optional parameters */
1443 unsigned long long maxneigh;
1446 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1447 "MAX_CONNECTIONS", &maxneigh))
1449 plugin->max_connections = maxneigh;
1456 * Entry point for the plugin.
1459 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1461 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1462 struct GNUNET_TRANSPORT_PluginFunctions *api;
1463 struct Plugin *plugin;
1466 if (NULL == env->receive)
1468 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1469 initialze the plugin or the API */
1470 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1472 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1473 api->address_to_string = &http_plugin_address_to_string;
1474 api->string_to_address = &http_string_to_address;
1478 plugin = GNUNET_malloc (sizeof (struct Plugin));
1480 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1482 api->disconnect = &http_plugin_disconnect;
1483 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1484 api->check_address = &http_plugin_address_suggested;
1485 api->address_to_string = &http_plugin_address_to_string;
1486 api->string_to_address = &http_string_to_address;
1487 api->get_session = &http_get_session;
1488 api->send = &http_plugin_send;
1491 plugin->name = "transport-https";
1492 plugin->protocol = "https";
1494 plugin->name = "transport-http";
1495 plugin->protocol = "http";
1497 /* Configure plugin from configuration */
1498 res = configure_plugin (plugin);
1499 if (res == GNUNET_SYSERR)
1501 GNUNET_free_non_null (plugin->server_addr_v4);
1502 GNUNET_free_non_null (plugin->server_addr_v6);
1503 GNUNET_free (plugin);
1508 /* checking IPv6 support */
1509 http_check_ipv6 (plugin);
1512 res = client_start (plugin);
1513 if (res == GNUNET_SYSERR)
1515 GNUNET_free_non_null (plugin->server_addr_v4);
1516 GNUNET_free_non_null (plugin->server_addr_v6);
1517 GNUNET_free (plugin);
1523 if (plugin->client_only == GNUNET_NO)
1525 res = server_start (plugin);
1526 if (res == GNUNET_SYSERR)
1528 server_stop (plugin);
1529 client_stop (plugin);
1531 GNUNET_free_non_null (plugin->server_addr_v4);
1532 GNUNET_free_non_null (plugin->server_addr_v6);
1533 GNUNET_free (plugin);
1538 /* Report addresses to transport service */
1539 start_report_addresses (plugin);
1542 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1543 "Plugin `%s' loaded\n", plugin->name);
1551 * Exit point from the plugin.
1554 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1556 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1557 struct Plugin *plugin = api->cls;
1566 /* Stop reporting addresses to transport service */
1567 stop_report_addresses (plugin);
1569 /* cleaning up sessions */
1574 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1575 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1577 if (s->inbound == GNUNET_NO)
1578 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1580 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1585 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1588 server_stop (plugin);
1591 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1594 client_stop (plugin);
1596 /* deleting up sessions */
1600 struct Session *t = s->next;
1602 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1604 struct HTTP_Message *msg = s->msg_head;
1605 struct HTTP_Message *tmp = NULL;
1611 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1612 if (msg->transmit_cont != NULL)
1614 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1626 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1627 "Plugin `%s' unloaded\n", plugin->name);
1630 GNUNET_free_non_null (plugin->server_addr_v4);
1631 GNUNET_free_non_null (plugin->server_addr_v6);
1632 GNUNET_free (plugin);
1638 /* end of plugin_transport_http.c */