2 This file is part of GNUnet
3 (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_http.c
23 * @brief http transport service plugin
24 * @author Matthias Wachs
27 #include "plugin_transport_http.h"
30 * After how long do we expire an address that we
31 * learned from another peer if it is not reconfirmed
34 #define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
37 * Wrapper to manage IPv4 addresses
39 struct IPv4HttpAddressWrapper
44 struct IPv4HttpAddressWrapper *next;
47 * Linked list previous
49 struct IPv4HttpAddressWrapper *prev;
51 struct IPv4HttpAddress addr;
55 * Wrapper for IPv4 addresses.
57 struct IPv6HttpAddressWrapper
62 struct IPv6HttpAddressWrapper *next;
65 * Linked list previous
67 struct IPv6HttpAddressWrapper *prev;
69 struct IPv6HttpAddress addr6;
74 * Context for address to string conversion.
76 struct PrettyPrinterContext
79 * Function to call with the result.
81 GNUNET_TRANSPORT_AddressStringCallback asc;
86 struct Plugin *plugin;
94 * Port to add after the IP address.
105 * Encapsulation of all of the state of the plugin.
112 * Append our port and forward the result.
114 * @param cls the 'struct PrettyPrinterContext*'
115 * @param hostname hostname part of the address
118 append_port (void *cls, const char *hostname)
120 struct PrettyPrinterContext *ppc = cls;
121 static char rbuf[INET6_ADDRSTRLEN + 13];
123 if (hostname == NULL)
125 ppc->asc (ppc->asc_cls, NULL);
131 const char *protocol = "http";
133 const char *protocol = "https";
135 GNUNET_assert ((strlen (hostname) + 7) < (INET6_ADDRSTRLEN + 13));
136 if (ppc->addrlen == sizeof (struct IPv6HttpAddress))
138 if (ppc->numeric == GNUNET_YES)
139 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol, hostname, ppc->port);
142 if (strchr(hostname, ':') != NULL)
143 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol, hostname, ppc->port);
145 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, hostname, ppc->port);
148 else if (ppc->addrlen == sizeof (struct IPv4HttpAddress))
149 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, hostname, ppc->port);
150 ppc->asc (ppc->asc_cls, rbuf);
158 * Convert the transports address to a nice, human-readable
162 * @param type name of the transport that generated the address
163 * @param addr one of the addresses of the host, NULL for the last address
164 * the specific address format depends on the transport
165 * @param addrlen length of the address
166 * @param numeric should (IP) addresses be displayed in numeric form?
167 * @param timeout after how long should we give up?
168 * @param asc function to call on each string
169 * @param asc_cls closure for asc
172 http_plugin_address_pretty_printer (void *cls, const char *type,
173 const void *addr, size_t addrlen,
175 struct GNUNET_TIME_Relative timeout,
176 GNUNET_TRANSPORT_AddressStringCallback asc,
179 GNUNET_assert (cls != NULL);
180 struct PrettyPrinterContext *ppc;
182 struct sockaddr_in s4;
183 struct sockaddr_in6 s6;
187 if ((addrlen == sizeof (struct IPv6HttpAddress)) && (addr != NULL))
189 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
190 s6.sin6_family = AF_INET6;
191 s6.sin6_addr = a6->ipv6_addr;
192 s6.sin6_port = a6->u6_port;
193 #if HAVE_SOCKADDR_IN_SIN_LEN
194 s6.sin6_len = sizeof (struct sockaddr_in6);
197 sbs = sizeof (struct sockaddr_in6);
198 port = ntohs (a6->u6_port);
201 else if ((addrlen == sizeof (struct IPv4HttpAddress)) && (addr != NULL))
203 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
205 s4.sin_family = AF_INET;
206 s4.sin_addr.s_addr = a4->ipv4_addr;
207 s4.sin_port = a4->u4_port;
208 #if HAVE_SOCKADDR_IN_SIN_LEN
209 s4.sin_len = sizeof (struct sockaddr_in);
212 sbs = sizeof (struct sockaddr_in);
213 port = ntohs (a4->u4_port);
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 ((NULL == addr) || (addrlen == 0))
357 return GNUNET_SYSERR;
360 if ('\0' != addr[addrlen - 1])
363 return GNUNET_SYSERR;
366 if (strlen (addr) != addrlen - 1)
369 return GNUNET_SYSERR;
372 /* protocoll + "://" + ":" */
373 if (addrlen <= (strlen (protocol) + 4))
375 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
376 "Invalid address string `%s' to convert to address\n",
379 return GNUNET_SYSERR;
382 if (NULL == (addr_str = strstr(addr, "://")))
384 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
385 "Invalid address string `%s' to convert to address\n",
388 return GNUNET_SYSERR;
390 addr_str = &addr_str[3];
392 if (addr_str[strlen(addr_str)-1] == '/')
393 addr_str[strlen(addr_str)-1] = '\0';
395 if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv4(addr_str, strlen(addr_str), &addr_4))
397 http_4addr = GNUNET_malloc (sizeof (struct IPv4HttpAddress));
398 http_4addr->u4_port = addr_4.sin_port;
399 http_4addr->ipv4_addr = (uint32_t) addr_4.sin_addr.s_addr;
401 (*added) = sizeof (struct IPv4HttpAddress);
404 else if (GNUNET_OK == GNUNET_STRINGS_to_address_ipv6(addr_str, strlen(addr_str), &addr_6))
406 http_6addr = GNUNET_malloc (sizeof (struct IPv6HttpAddress));
407 http_6addr->u6_port = addr_6.sin6_port;
408 http_6addr->ipv6_addr = addr_6.sin6_addr;
410 (*added) = sizeof (struct IPv6HttpAddress);
415 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
416 "Invalid address string `%s' to convert to address\n",
419 return GNUNET_SYSERR;
426 * Function called for a quick conversion of the binary address to
427 * a numeric address. Note that the caller must not free the
428 * address and that the next call to this function is allowed
429 * to override the address again.
432 * @param addr binary address
433 * @param addrlen length of the address
434 * @return string representing the same address
437 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
440 struct IPv4HttpAddress *a4;
441 struct IPv6HttpAddress *a6;
443 static char rbuf[INET6_ADDRSTRLEN + 13];
447 if (addrlen == sizeof (struct IPv6HttpAddress))
449 a6 = (struct IPv6HttpAddress *) addr;
450 address = GNUNET_malloc (INET6_ADDRSTRLEN);
451 GNUNET_assert (NULL !=
452 inet_ntop (AF_INET6, &a6->ipv6_addr, address,
454 port = ntohs (a6->u6_port);
456 else if (addrlen == sizeof (struct IPv4HttpAddress))
458 a4 = (struct IPv4HttpAddress *) addr;
459 address = GNUNET_malloc (INET_ADDRSTRLEN);
460 GNUNET_assert (NULL !=
461 inet_ntop (AF_INET, &(a4->ipv4_addr), address,
463 port = ntohs (a4->u4_port);
467 /* invalid address */
472 char *protocol = "http";
474 char *protocol = "https";
477 GNUNET_assert (strlen (address) + 7 < (INET6_ADDRSTRLEN + 13));
478 if (addrlen == sizeof (struct IPv6HttpAddress))
480 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol,
482 else if (addrlen == sizeof (struct IPv4HttpAddress))
484 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, address,
487 GNUNET_free (address);
488 GNUNET_assert (res != 0);
493 lookup_session_old (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
494 struct Session *session, const void *addr, size_t addrlen,
501 for (t = plugin->head; NULL != t; t = t->next)
504 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
505 "Comparing peer `%s' address `%s' len %i session %X to \n",
506 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
508 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
509 "peer `%s' address `%s' len %i session %X \n\n",
510 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
512 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
513 memcmp (addr, t->addr, addrlen));
517 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
520 if ( (addrlen == t->addrlen) &&
521 (0 == memcmp (addr, t->addr, addrlen)) )
523 if ( (t == session) &&
524 (t->addrlen == session->addrlen) &&
525 (0 == memcmp (session->addr, t->addr, t->addrlen)) )
529 if ( ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO)) ||
530 ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) && (e_addr == GNUNET_YES)) ||
531 ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR)) )
538 lookup_session (struct Plugin *plugin,
539 const struct GNUNET_HELLO_Address *address)
543 for (pos = plugin->head; NULL != pos; pos = pos->next)
544 if ( (0 == memcmp (&address->peer, &pos->target, sizeof (struct GNUNET_PeerIdentity))) &&
545 (address->address_length == pos->addrlen) &&
546 (0 == memcmp (address->address, pos->addr, pos->addrlen)) )
552 exist_session (struct Plugin *plugin, struct Session *s)
554 struct Session * head;
556 GNUNET_assert (NULL != plugin);
557 GNUNET_assert (NULL != s);
559 for (head = plugin->head; head != NULL; head = head->next)
570 delete_session (struct Session *s)
572 if (s->msg_tk != NULL)
574 GNUNET_SERVER_mst_destroy (s->msg_tk);
577 GNUNET_free (s->addr);
578 GNUNET_free_non_null (s->server_recv);
579 GNUNET_free_non_null (s->server_send);
584 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
585 const void *addr, size_t addrlen,
586 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
588 struct Session *s = NULL;
590 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
591 (addrlen == sizeof (struct IPv4HttpAddress)));
592 s = GNUNET_malloc (sizeof (struct Session));
593 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
595 s->addr = GNUNET_malloc (addrlen);
596 memcpy (s->addr, addr, addrlen);
597 s->addrlen = addrlen;
599 s->next_receive = GNUNET_TIME_absolute_get_zero ();
600 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
605 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
608 struct Plugin *plugin = cls;
610 plugin->env->session_end (plugin->env->cls, peer, s);
611 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
616 * Creates a new outbound session the transport service will use to send data to the
619 * @param cls the plugin
620 * @param address the address
621 * @return the session or NULL of max connections exceeded
624 static struct Session *
625 http_get_session (void *cls,
626 const struct GNUNET_HELLO_Address *address)
628 struct Plugin *plugin = cls;
629 struct Session * s = NULL;
630 struct GNUNET_ATS_Information ats;
633 GNUNET_assert (plugin != NULL);
634 GNUNET_assert (address != NULL);
635 GNUNET_assert (address->address != NULL);
637 ats.type = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
638 ats.value = htonl (GNUNET_ATS_ARRAY_TERMINATOR);
640 /* find existing session */
641 s = lookup_session (plugin, address);
645 if (plugin->max_connections <= plugin->cur_connections)
647 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
648 "Maximum number of connections reached, "
649 "cannot connect to peer `%s'\n", GNUNET_i2s (&address->peer));
653 /* create new session */
654 addrlen = address->address_length;
656 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
657 (addrlen == sizeof (struct IPv4HttpAddress)));
659 s = GNUNET_malloc (sizeof (struct Session));
660 memcpy (&s->target, &address->peer, sizeof (struct GNUNET_PeerIdentity));
662 s->addr = GNUNET_malloc (address->address_length);
663 memcpy (s->addr, address->address, address->address_length);
664 s->addrlen = addrlen;
666 s->next_receive = GNUNET_TIME_absolute_get_zero ();
667 s->inbound = GNUNET_NO;
668 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
671 if (addrlen == sizeof (struct IPv4HttpAddress))
673 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) address->address;
674 struct sockaddr_in s4;
676 s4.sin_family = AF_INET;
677 s4.sin_addr.s_addr = a4->ipv4_addr;
678 s4.sin_port = a4->u4_port;
679 #if HAVE_SOCKADDR_IN_SIN_LEN
680 s4.sin_len = sizeof (struct sockaddr_in);
682 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
684 if (addrlen == sizeof (struct IPv6HttpAddress))
686 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) address->address;
687 struct sockaddr_in6 s6;
689 s6.sin6_family = AF_INET6;
690 s6.sin6_addr = a6->ipv6_addr;
691 s6.sin6_port = a6->u6_port;
692 #if HAVE_SOCKADDR_IN_SIN_LEN
693 s6.sin6_len = sizeof (struct sockaddr_in6);
695 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
697 s->ats_address_network_type = ats.value;
699 /* add new session */
700 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
701 /* initiate new connection */
702 if (GNUNET_SYSERR == client_connect (s))
704 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
705 "Cannot connect to peer `%s' address `%s''\n",
706 http_plugin_address_to_string(NULL, s->addr, s->addrlen),
707 GNUNET_i2s (&s->target));
708 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
717 * Function that can be used by the transport service to transmit
718 * a message using the plugin. Note that in the case of a
719 * peer disconnecting, the continuation MUST be called
720 * prior to the disconnect notification itself. This function
721 * will be called with this peer's HELLO message to initiate
722 * a fresh connection to another peer.
725 * @param session which session must be used
726 * @param msgbuf the message to transmit
727 * @param msgbuf_size number of bytes in 'msgbuf'
728 * @param priority how important is the message (most plugins will
729 * ignore message priority and just FIFO)
730 * @param to how long to wait at most for the transmission (does not
731 * require plugins to discard the message after the timeout,
732 * just advisory for the desired delay; most plugins will ignore
734 * @param cont continuation to call once the message has
735 * been transmitted (or if the transport is ready
736 * for the next transmission call; or if the
737 * peer disconnected...); can be NULL
738 * @param cont_cls closure for cont
739 * @return number of bytes used (on the physical network, with overheads);
740 * -1 on hard errors (i.e. address invalid); 0 is a legal value
741 * and does NOT mean that the message was not transmitted (DV)
744 http_plugin_send (void *cls,
745 struct Session *session,
746 const char *msgbuf, size_t msgbuf_size,
747 unsigned int priority,
748 struct GNUNET_TIME_Relative to,
749 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
751 struct Plugin *plugin = cls;
752 struct HTTP_Message *msg;
756 GNUNET_assert (plugin != NULL);
757 GNUNET_assert (session != NULL);
759 /* lookup if session is really existing */
763 if ((tmp == session) &&
764 (0 == memcmp (&session->target, &tmp->target, sizeof (struct GNUNET_PeerIdentity))) &&
765 (session->addrlen == tmp->addrlen) &&
766 (0 == memcmp (session->addr, tmp->addr, tmp->addrlen)))
776 /* create new message and schedule */
778 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
780 msg->size = msgbuf_size;
782 msg->buf = (char *) &msg[1];
783 msg->transmit_cont = cont;
784 msg->transmit_cont_cls = cont_cls;
785 memcpy (msg->buf, msgbuf, msgbuf_size);
787 if (session->inbound == GNUNET_NO)
789 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
790 "Using outbound client session %p to send to `%s'\n", session,
791 GNUNET_i2s (&session->target));
792 client_send (session, msg);
795 if (session->inbound == GNUNET_YES)
797 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
798 "Using inbound server %p session to send to `%s'\n", session,
799 GNUNET_i2s (&session->target));
800 server_send (session, msg);
809 * Function that can be used to force the plugin to disconnect
810 * from the given peer and cancel all previous transmissions
811 * (and their continuationc).
814 * @param target peer from which to disconnect
817 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
819 struct Plugin *plugin = cls;
820 struct Session *next = NULL;
821 struct Session *s = plugin->head;
823 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
824 "Transport tells me to disconnect `%s'\n",
825 GNUNET_i2s (target));
829 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
831 if (s->inbound == GNUNET_NO)
832 GNUNET_assert (GNUNET_OK == client_disconnect (s));
834 GNUNET_assert (GNUNET_OK == server_disconnect (s));
835 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
837 struct HTTP_Message *msg = s->msg_head;
838 struct HTTP_Message *tmp = NULL;
844 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
845 if (msg->transmit_cont != NULL)
847 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
860 find_address (struct Plugin *plugin, const struct sockaddr *addr, socklen_t addrlen)
863 struct IPv4HttpAddressWrapper *w_t4 = NULL;
864 struct IPv6HttpAddressWrapper *w_t6 = NULL;
866 af = addr->sa_family;
870 w_t4 = plugin->ipv4_addr_head;
871 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
875 int res = memcmp (&w_t4->addr.ipv4_addr,
877 sizeof (struct in_addr));
881 if (a4->sin_port != w_t4->addr.u4_port)
892 w_t6 = plugin->ipv6_addr_head;
893 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
897 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
898 sizeof (struct in6_addr));
902 if (a6->sin6_port != w_t6->addr6.u6_port)
918 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
921 struct Plugin *plugin = cls;
922 struct IPv4HttpAddressWrapper *w_t4 = NULL;
923 struct IPv6HttpAddressWrapper *w_t6 = NULL;
926 af = addr->sa_family;
930 w_t4 = find_address (plugin, addr, addrlen);
933 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
934 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
935 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
936 w_t4->addr.u4_port = a4->sin_port;
938 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
939 plugin->ipv4_addr_tail, w_t4);
941 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
942 "Notifying transport to add IPv4 address `%s'\n",
943 http_plugin_address_to_string (NULL, &w_t4->addr,
946 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
947 sizeof (struct IPv4HttpAddress));
951 w_t6 = find_address (plugin, addr, addrlen);
954 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
955 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
956 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
957 w_t6->addr6.u6_port = a6->sin6_port;
959 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
960 plugin->ipv6_addr_tail, w_t6);
962 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
963 "Notifying transport to add IPv6 address `%s'\n",
964 http_plugin_address_to_string (NULL, &w_t6->addr6,
967 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
968 sizeof (struct IPv6HttpAddress));
978 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
981 struct Plugin *plugin = cls;
982 struct IPv4HttpAddressWrapper *w_t4 = NULL;
983 struct IPv6HttpAddressWrapper *w_t6 = NULL;
986 af = addr->sa_family;
990 w_t4 = find_address (plugin, addr, addrlen);
995 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
996 "Notifying transport to remove IPv4 address `%s'\n",
997 http_plugin_address_to_string (NULL, &w_t4->addr,
1000 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
1001 sizeof (struct IPv4HttpAddress));
1003 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1008 w_t6 = find_address (plugin, addr, addrlen);
1012 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1013 "Notifying transport to remove IPv6 address `%s'\n",
1014 http_plugin_address_to_string (NULL, &w_t6->addr6,
1018 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
1019 sizeof (struct IPv6HttpAddress));
1021 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1032 * Our external IP address/port mapping has changed.
1034 * @param cls closure, the 'struct LocalAddrList'
1035 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
1036 * the previous (now invalid) one
1037 * @param addr either the previous or the new public IP address
1038 * @param addrlen actual lenght of the address
1041 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
1044 GNUNET_assert (cls != NULL);
1045 struct Plugin *plugin = cls;
1047 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1048 "NPMC called %s to address `%s'\n",
1049 (add_remove == GNUNET_NO) ? "remove" : "add",
1050 GNUNET_a2s (addr, addrlen));
1055 nat_add_address (cls, add_remove, addr, addrlen);
1058 nat_remove_address (cls, add_remove, addr, addrlen);
1064 http_check_ipv6 (struct Plugin *plugin)
1066 struct GNUNET_NETWORK_Handle *desc = NULL;
1068 if (plugin->ipv6 == GNUNET_YES)
1070 /* probe IPv6 support */
1071 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
1074 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
1077 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
1079 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
1081 ("Disabling IPv6 since it is not supported on this system!\n"));
1082 plugin->ipv6 = GNUNET_NO;
1086 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
1090 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1091 "Testing IPv6 on this system: %s\n",
1092 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
1097 http_get_addresses (struct Plugin *plugin, const char *serviceName,
1098 const struct GNUNET_CONFIGURATION_Handle *cfg,
1099 struct sockaddr ***addrs, socklen_t ** addr_lens)
1102 unsigned long long port;
1103 struct addrinfo hints;
1104 struct addrinfo *res;
1105 struct addrinfo *pos;
1106 struct addrinfo *next;
1110 struct sockaddr **saddrs;
1111 socklen_t *saddrlens;
1117 disablev6 = !plugin->ipv6;
1120 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
1122 GNUNET_break (GNUNET_OK ==
1123 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
1127 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1129 ("Require valid port number for service in configuration!\n"));
1130 return GNUNET_SYSERR;
1134 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1136 GNUNET_break (GNUNET_OK ==
1137 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1138 "BINDTO", &hostname));
1143 if (hostname != NULL)
1145 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1146 "Resolving `%s' since that is where `%s' will bind to.\n",
1147 hostname, serviceName);
1148 memset (&hints, 0, sizeof (struct addrinfo));
1150 hints.ai_family = AF_INET;
1151 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1154 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1155 hostname, gai_strerror (ret));
1156 GNUNET_free (hostname);
1157 return GNUNET_SYSERR;
1161 while (NULL != (pos = next))
1163 next = pos->ai_next;
1164 if ((disablev6) && (pos->ai_family == AF_INET6))
1170 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1171 _("Failed to find %saddress for `%s'.\n"),
1172 disablev6 ? "IPv4 " : "", hostname);
1174 GNUNET_free (hostname);
1175 return GNUNET_SYSERR;
1178 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1179 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1182 while (NULL != (pos = next))
1184 next = pos->ai_next;
1185 if ((disablev6) && (pos->ai_family == AF_INET6))
1187 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1188 continue; /* not TCP */
1189 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1190 continue; /* huh? */
1191 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1192 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1194 if (pos->ai_family == AF_INET)
1196 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1197 saddrlens[i] = pos->ai_addrlen;
1198 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1199 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1200 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1204 GNUNET_assert (pos->ai_family == AF_INET6);
1205 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1206 saddrlens[i] = pos->ai_addrlen;
1207 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1208 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1209 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1213 GNUNET_free (hostname);
1219 /* will bind against everything, just set port */
1225 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1226 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1228 saddrlens[i] = sizeof (struct sockaddr_in);
1229 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1230 #if HAVE_SOCKADDR_IN_SIN_LEN
1231 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1233 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1234 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1240 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1241 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1243 saddrlens[i] = sizeof (struct sockaddr_in6);
1244 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1245 #if HAVE_SOCKADDR_IN_SIN_LEN
1246 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1248 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1249 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1251 saddrlens[i] = sizeof (struct sockaddr_in);
1252 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1253 #if HAVE_SOCKADDR_IN_SIN_LEN
1254 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1256 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1257 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1261 *addr_lens = saddrlens;
1266 start_report_addresses (struct Plugin *plugin)
1268 int res = GNUNET_OK;
1269 struct sockaddr **addrs;
1270 socklen_t *addrlens;
1273 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1275 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1276 _("Found %u addresses to report to NAT service\n"), res);
1278 if (res != GNUNET_SYSERR)
1281 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1283 (const struct sockaddr **) addrs, addrlens,
1284 &nat_port_map_callback, NULL, plugin);
1289 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1290 GNUNET_a2s (addrs[res], addrlens[res]));
1292 GNUNET_assert (addrs[res] != NULL);
1293 GNUNET_free (addrs[res]);
1295 GNUNET_free_non_null (addrs);
1296 GNUNET_free_non_null (addrlens);
1301 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1302 NULL, NULL, plugin);
1307 stop_report_addresses (struct Plugin *plugin)
1309 /* Stop NAT handle */
1310 GNUNET_NAT_unregister (plugin->nat);
1312 /* Clean up addresses */
1313 struct IPv4HttpAddressWrapper *w_t4;
1314 struct IPv6HttpAddressWrapper *w_t6;
1316 while (plugin->ipv4_addr_head != NULL)
1318 w_t4 = plugin->ipv4_addr_head;
1319 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1324 while (plugin->ipv6_addr_head != NULL)
1326 w_t6 = plugin->ipv6_addr_head;
1327 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1334 configure_plugin (struct Plugin *plugin)
1336 int res = GNUNET_OK;
1339 if (GNUNET_CONFIGURATION_have_value
1340 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1343 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1347 plugin->ipv4 = GNUNET_YES;
1350 if (GNUNET_CONFIGURATION_have_value
1351 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1354 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1358 plugin->ipv6 = GNUNET_YES;
1360 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1362 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1364 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1366 res = GNUNET_SYSERR;
1369 /* Reading port number from config file */
1370 unsigned long long port;
1373 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1374 "PORT", &port)) || (port > 65535))
1376 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1377 _("Port is required! Fix in configuration\n"),
1379 res = GNUNET_SYSERR;
1382 plugin->port = port;
1384 plugin->client_only = GNUNET_NO;
1385 if (plugin->port == 0)
1387 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1388 _("Port 0, client only mode\n"));
1389 plugin->client_only = GNUNET_YES;
1392 char *bind4_address = NULL;
1394 if ((plugin->ipv4 == GNUNET_YES) &&
1396 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1397 "BINDTO", &bind4_address)))
1399 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1400 "Binding %s plugin to specific IPv4 address: `%s'\n",
1401 plugin->protocol, bind4_address);
1402 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1404 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1406 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1408 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1409 bind4_address, plugin->protocol);
1410 GNUNET_free (plugin->server_addr_v4);
1411 plugin->server_addr_v4 = NULL;
1415 plugin->server_addr_v4->sin_family = AF_INET;
1416 plugin->server_addr_v4->sin_port = htons (plugin->port);
1418 GNUNET_free (bind4_address);
1422 char *bind6_address = NULL;
1424 if ((plugin->ipv6 == GNUNET_YES) &&
1426 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1427 "BINDTO6", &bind6_address)))
1429 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1430 "Binding %s plugin to specific IPv6 address: `%s'\n",
1431 plugin->protocol, bind6_address);
1432 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1434 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1436 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1438 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1439 bind6_address, plugin->protocol);
1440 GNUNET_free (plugin->server_addr_v6);
1441 plugin->server_addr_v6 = NULL;
1445 plugin->server_addr_v6->sin6_family = AF_INET6;
1446 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1448 GNUNET_free (bind6_address);
1452 /* Optional parameters */
1453 unsigned long long maxneigh;
1456 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1457 "MAX_CONNECTIONS", &maxneigh))
1459 plugin->max_connections = maxneigh;
1466 * Entry point for the plugin.
1469 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1471 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1472 struct GNUNET_TRANSPORT_PluginFunctions *api;
1473 struct Plugin *plugin;
1476 if (NULL == env->receive)
1478 /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
1479 initialze the plugin or the API */
1480 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1482 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1483 api->address_to_string = &http_plugin_address_to_string;
1484 api->string_to_address = &http_string_to_address;
1488 plugin = GNUNET_malloc (sizeof (struct Plugin));
1490 plugin->outbound_sessions = 0;
1491 plugin->inbound_sessions = 0;
1492 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1494 api->disconnect = &http_plugin_disconnect;
1495 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1496 api->check_address = &http_plugin_address_suggested;
1497 api->address_to_string = &http_plugin_address_to_string;
1498 api->string_to_address = &http_string_to_address;
1499 api->get_session = &http_get_session;
1500 api->send = &http_plugin_send;
1503 plugin->name = "transport-https";
1504 plugin->protocol = "https";
1506 plugin->name = "transport-http";
1507 plugin->protocol = "http";
1509 /* Configure plugin from configuration */
1510 res = configure_plugin (plugin);
1511 if (res == GNUNET_SYSERR)
1513 GNUNET_free_non_null (plugin->server_addr_v4);
1514 GNUNET_free_non_null (plugin->server_addr_v6);
1515 GNUNET_free (plugin);
1520 /* checking IPv6 support */
1521 http_check_ipv6 (plugin);
1524 res = client_start (plugin);
1525 if (res == GNUNET_SYSERR)
1527 GNUNET_free_non_null (plugin->server_addr_v4);
1528 GNUNET_free_non_null (plugin->server_addr_v6);
1529 GNUNET_free (plugin);
1535 if (plugin->client_only == GNUNET_NO)
1537 res = server_start (plugin);
1538 if (res == GNUNET_SYSERR)
1540 server_stop (plugin);
1541 client_stop (plugin);
1543 GNUNET_free_non_null (plugin->server_addr_v4);
1544 GNUNET_free_non_null (plugin->server_addr_v6);
1545 GNUNET_free (plugin);
1550 /* Report addresses to transport service */
1551 start_report_addresses (plugin);
1553 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1554 "Plugin `%s' loaded\n", plugin->name);
1560 * Exit point from the plugin.
1563 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1565 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1566 struct Plugin *plugin = api->cls;
1575 /* Stop reporting addresses to transport service */
1576 stop_report_addresses (plugin);
1578 /* cleaning up sessions */
1582 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1583 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1584 if (s->inbound == GNUNET_NO)
1585 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1587 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1591 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1593 server_stop (plugin);
1595 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1597 client_stop (plugin);
1599 /* deleting up sessions */
1603 struct Session *t = s->next;
1605 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1607 struct HTTP_Message *msg = s->msg_head;
1608 struct HTTP_Message *tmp = NULL;
1614 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1615 if (msg->transmit_cont != NULL)
1617 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1627 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1628 "Plugin `%s' unloaded\n", plugin->name);
1629 GNUNET_free_non_null (plugin->server_addr_v4);
1630 GNUNET_free_non_null (plugin->server_addr_v6);
1631 GNUNET_free (plugin);
1636 /* end of plugin_transport_http.c */