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.
101 * Encapsulation of all of the state of the plugin.
108 * Append our port and forward the result.
110 * @param cls the 'struct PrettyPrinterContext*'
111 * @param hostname hostname part of the address
114 append_port (void *cls, const char *hostname)
116 struct PrettyPrinterContext *ppc = cls;
119 if (hostname == NULL)
121 ppc->asc (ppc->asc_cls, NULL);
125 GNUNET_asprintf (&ret, "%s://%s:%d", ppc->plugin->protocol, hostname,
127 ppc->asc (ppc->asc_cls, ret);
133 * Convert the transports address to a nice, human-readable
137 * @param type name of the transport that generated the address
138 * @param addr one of the addresses of the host, NULL for the last address
139 * the specific address format depends on the transport
140 * @param addrlen length of the address
141 * @param numeric should (IP) addresses be displayed in numeric form?
142 * @param timeout after how long should we give up?
143 * @param asc function to call on each string
144 * @param asc_cls closure for asc
147 http_plugin_address_pretty_printer (void *cls, const char *type,
148 const void *addr, size_t addrlen,
150 struct GNUNET_TIME_Relative timeout,
151 GNUNET_TRANSPORT_AddressStringCallback asc,
154 GNUNET_assert (cls != NULL);
155 struct PrettyPrinterContext *ppc;
160 if (addrlen == sizeof (struct IPv6HttpAddress))
162 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
165 sbs = sizeof (struct in6_addr);
166 port = ntohs (a6->u6_port);
168 else if (addrlen == sizeof (struct IPv4HttpAddress))
170 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
173 sbs = sizeof (struct in_addr);
174 port = ntohs (a4->u4_port);
178 /* invalid address */
183 ppc = GNUNET_malloc (sizeof (struct PrettyPrinterContext));
185 ppc->asc_cls = asc_cls;
188 GNUNET_RESOLVER_hostname_get (sb, sbs, !numeric, timeout, &append_port, ppc);
194 * Another peer has suggested an address for this
195 * peer and transport plugin. Check that this could be a valid
196 * address. If so, consider adding it to the list
200 * @param addr pointer to the address
201 * @param addrlen length of addr
202 * @return GNUNET_OK if this is a plausible address for this peer
206 http_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
209 struct Plugin *plugin = cls;
210 struct IPv4HttpAddressWrapper *w_tv4 = plugin->ipv4_addr_head;
211 struct IPv6HttpAddressWrapper *w_tv6 = plugin->ipv6_addr_head;
215 GNUNET_assert (cls != NULL);
216 if ((addrlen != sizeof (struct sockaddr_in)) ||
217 (addrlen != sizeof (struct sockaddr_in6)))
218 return GNUNET_SYSERR;
220 if (addrlen == sizeof (struct IPv4HttpAddress))
222 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
224 while (w_tv4 != NULL)
227 memcmp (&w_tv4->addr.ipv4_addr, &a4->ipv4_addr,
228 sizeof (struct in_addr))) &&
229 (w_tv4->addr.u4_port == a4->u4_port))
236 return GNUNET_SYSERR;
238 if (addrlen == sizeof (struct sockaddr_in6))
240 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
242 while (w_tv6 != NULL)
245 memcmp (&w_tv6->addr6.ipv6_addr, &a6->ipv6_addr,
246 sizeof (struct in6_addr))) &&
247 (w_tv6->addr6.u6_port == a6->u6_port))
254 return GNUNET_SYSERR;
259 struct GNUNET_TIME_Relative
260 http_plugin_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
261 const struct GNUNET_MessageHeader *message,
262 struct Session *session, const char *sender_address,
263 uint16_t sender_address_len)
265 struct Session *s = cls;
266 struct Plugin *plugin = s->plugin;
267 struct GNUNET_TIME_Relative delay;
268 struct GNUNET_ATS_Information atsi[2];
270 atsi[0].type = htonl (GNUNET_ATS_QUALITY_NET_DISTANCE);
271 atsi[0].value = htonl (1);
272 atsi[1].type = htonl (GNUNET_ATS_NETWORK_TYPE);
273 atsi[1].value = session->ats_address_network_type;
274 GNUNET_break (session->ats_address_network_type != ntohl (GNUNET_ATS_NET_UNSPECIFIED));
277 plugin->env->receive (plugin->env->cls, &s->target, message,
278 (const struct GNUNET_ATS_Information *) &atsi,
279 2, s, s->addr, s->addrlen);
284 * Function called for a quick conversion of the binary address to
285 * a numeric address. Note that the caller must not free the
286 * address and that the next call to this function is allowed
287 * to override the address again.
290 * @param addr binary address
291 * @param addrlen length of the address
292 * @return string representing the same address
295 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
298 struct IPv4HttpAddress *a4;
299 struct IPv6HttpAddress *a6;
301 static char rbuf[INET6_ADDRSTRLEN + 13];
305 if (addrlen == sizeof (struct IPv6HttpAddress))
307 a6 = (struct IPv6HttpAddress *) addr;
308 address = GNUNET_malloc (INET6_ADDRSTRLEN);
309 GNUNET_assert (NULL !=
310 inet_ntop (AF_INET6, &a6->ipv6_addr, address,
312 port = ntohs (a6->u6_port);
314 else if (addrlen == sizeof (struct IPv4HttpAddress))
316 a4 = (struct IPv4HttpAddress *) addr;
317 address = GNUNET_malloc (INET_ADDRSTRLEN);
318 GNUNET_assert (NULL !=
319 inet_ntop (AF_INET, &(a4->ipv4_addr), address,
321 port = ntohs (a4->u4_port);
325 /* invalid address */
330 char *protocol = "http";
332 char *protocol = "https";
335 GNUNET_assert (strlen (address) + 7 < (INET6_ADDRSTRLEN + 13));
336 if (addrlen == sizeof (struct IPv6HttpAddress))
338 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://[%s]:%u/", protocol,
340 else if (addrlen == sizeof (struct IPv4HttpAddress))
342 GNUNET_snprintf (rbuf, sizeof (rbuf), "%s://%s:%u/", protocol, address,
345 GNUNET_free (address);
346 GNUNET_assert (res != 0);
351 lookup_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
352 struct Session *session, const void *addr, size_t addrlen,
355 struct Session *s = NULL;
356 struct Session *t = NULL;
366 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
367 "Comparing peer `%s' address `%s' len %i session %X to \n",
368 GNUNET_i2s (target), GNUNET_a2s (addr, addrlen), addrlen,
370 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
371 "peer `%s' address `%s' len %i session %X \n\n",
372 GNUNET_i2s (&t->target), GNUNET_a2s (t->addr, t->addrlen),
374 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, "memcmp %i \n",
375 memcmp (addr, t->addr, addrlen));
380 if (0 == memcmp (target, &t->target, sizeof (struct GNUNET_PeerIdentity)))
383 if (addrlen == t->addrlen)
385 if (0 == memcmp (addr, t->addr, addrlen))
392 if (t->addrlen == session->addrlen)
394 if (0 == memcmp (session->addr, t->addr, t->addrlen))
402 if ((e_peer == GNUNET_YES) && (force_address == GNUNET_NO))
407 if ((e_peer == GNUNET_YES) && (force_address == GNUNET_YES) &&
408 (e_addr == GNUNET_YES))
413 if ((e_peer == GNUNET_YES) && (force_address == GNUNET_SYSERR))
428 delete_session (struct Session *s)
430 if (s->msg_tk != NULL)
432 GNUNET_SERVER_mst_destroy (s->msg_tk);
435 GNUNET_free (s->addr);
436 GNUNET_free_non_null (s->server_recv);
437 GNUNET_free_non_null (s->server_send);
442 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
443 const void *addr, size_t addrlen,
444 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
446 struct Session *s = NULL;
448 GNUNET_assert ((addrlen == sizeof (struct IPv6HttpAddress)) ||
449 (addrlen == sizeof (struct IPv4HttpAddress)));
450 s = GNUNET_malloc (sizeof (struct Session));
451 memcpy (&s->target, target, sizeof (struct GNUNET_PeerIdentity));
453 s->addr = GNUNET_malloc (addrlen);
454 memcpy (s->addr, addr, addrlen);
455 s->addrlen = addrlen;
457 s->next_receive = GNUNET_TIME_absolute_get_zero ();
458 s->ats_address_network_type = htonl (GNUNET_ATS_NET_UNSPECIFIED);
463 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
466 struct Plugin *plugin = cls;
468 plugin->env->session_end (plugin->env->cls, peer, s);
469 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
475 * Function that can be used by the transport service to transmit
476 * a message using the plugin. Note that in the case of a
477 * peer disconnecting, the continuation MUST be called
478 * prior to the disconnect notification itself. This function
479 * will be called with this peer's HELLO message to initiate
480 * a fresh connection to another peer.
483 * @param target who should receive this message
484 * @param msgbuf the message to transmit
485 * @param msgbuf_size number of bytes in 'msgbuf'
486 * @param priority how important is the message (most plugins will
487 * ignore message priority and just FIFO)
488 * @param to how long to wait at most for the transmission (does not
489 * require plugins to discard the message after the timeout,
490 * just advisory for the desired delay; most plugins will ignore
492 * @param session which session must be used (or NULL for "any")
493 * @param addr the address to use (can be NULL if the plugin
494 * is "on its own" (i.e. re-use existing TCP connection))
495 * @param addrlen length of the address in bytes
496 * @param force_address GNUNET_YES if the plugin MUST use the given address,
497 * GNUNET_NO means the plugin may use any other address and
498 * GNUNET_SYSERR means that only reliable existing
499 * bi-directional connections should be used (regardless
501 * @param cont continuation to call once the message has
502 * been transmitted (or if the transport is ready
503 * for the next transmission call; or if the
504 * peer disconnected...); can be NULL
505 * @param cont_cls closure for cont
506 * @return number of bytes used (on the physical network, with overheads);
507 * -1 on hard errors (i.e. address invalid); 0 is a legal value
508 * and does NOT mean that the message was not transmitted (DV)
511 http_plugin_send (void *cls, const struct GNUNET_PeerIdentity *target,
512 const char *msgbuf, size_t msgbuf_size, unsigned int priority,
513 struct GNUNET_TIME_Relative to, struct Session *session,
514 const void *addr, size_t addrlen, int force_address,
515 GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
517 struct Plugin *plugin = cls;
518 struct HTTP_Message *msg;
521 GNUNET_assert (plugin != NULL);
523 int res = GNUNET_SYSERR;
526 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
527 "Sending %u bytes to peer `%s' on address `%s' %X %i\n",
528 msgbuf_size, GNUNET_i2s (target), ((addr != NULL) &&
531 http_plugin_address_to_string (plugin, addr,
532 addrlen) : "<inbound>",
533 session, force_address);
539 GNUNET_assert ((addrlen == sizeof (struct IPv4HttpAddress)) ||
540 (addrlen == sizeof (struct IPv6HttpAddress)));
543 /* look for existing connection */
544 s = lookup_session (plugin, target, session, addr, addrlen, 1);
546 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
547 "%s existing session: %s\n",
548 (s != NULL) ? "Found" : "NOT Found", ((s != NULL) &&
551 "inbound" : "outbound");
554 /* create new outbound connection */
557 if (plugin->max_connections <= plugin->cur_connections)
559 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
560 "Maximum number of connections reached, "
561 "cannot connect to peer `%s'\n", GNUNET_i2s (target));
566 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
567 "Initiiating new connection to peer `%s'\n",
568 GNUNET_i2s (target));
571 struct GNUNET_ATS_Information ats;
572 if (addrlen == sizeof (struct IPv4HttpAddress))
574 struct IPv4HttpAddress *a4 = (struct IPv4HttpAddress *) addr;
575 struct sockaddr_in s4;
577 s4.sin_family = AF_INET;
578 s4.sin_addr.s_addr = a4->ipv4_addr;
579 s4.sin_port = a4->u4_port;
580 #if HAVE_SOCKADDR_IN_SIN_LEN
581 s4.sin_len = sizeof (struct sockaddr_in);
583 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s4, sizeof (struct sockaddr_in));
585 if ((ntohs (a4->u4_port) == 0) || (plugin->ipv4 == GNUNET_NO))
588 if (addrlen == sizeof (struct IPv6HttpAddress))
590 struct IPv6HttpAddress *a6 = (struct IPv6HttpAddress *) addr;
591 struct sockaddr_in6 s6;
593 s6.sin6_family = AF_INET6;
594 s6.sin6_addr = a6->ipv6_addr;
595 s6.sin6_port = a6->u6_port;
596 #if HAVE_SOCKADDR_IN_SIN_LEN
597 s6.sin6_len = sizeof (struct sockaddr_in6);
599 ats = plugin->env->get_address_type (plugin->env->cls, (const struct sockaddr *) &s6, sizeof (struct sockaddr_in6));
601 if ((ntohs (a6->u6_port) == 0) || (plugin->ipv6 == GNUNET_NO))
604 if (res == GNUNET_OK)
606 s = create_session (plugin, target, addr, addrlen, cont, cont_cls);
607 s->ats_address_network_type = ats.value;
608 GNUNET_CONTAINER_DLL_insert (plugin->head, plugin->tail, s);
609 // initiate new connection
610 res = client_connect (s);
612 if (res == GNUNET_SYSERR)
616 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
619 return GNUNET_SYSERR;
623 msg = GNUNET_malloc (sizeof (struct HTTP_Message) + msgbuf_size);
625 msg->size = msgbuf_size;
627 msg->buf = (char *) &msg[1];
628 msg->transmit_cont = cont;
629 msg->transmit_cont_cls = cont_cls;
630 memcpy (msg->buf, msgbuf, msgbuf_size);
632 if (s->inbound == GNUNET_NO)
635 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
636 "Using outbound client session %p to send to `%s'\n", s,
637 GNUNET_i2s (target));
640 client_send (s, msg);
643 if (s->inbound == GNUNET_YES)
646 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
647 "Using inbound server %p session to send to `%s'\n", s,
648 GNUNET_i2s (target));
651 server_send (s, msg);
659 * Function that can be used to force the plugin to disconnect
660 * from the given peer and cancel all previous transmissions
661 * (and their continuationc).
664 * @param target peer from which to disconnect
667 http_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
669 struct Plugin *plugin = cls;
670 struct Session *next = NULL;
671 struct Session *s = plugin->head;
673 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
674 "Transport tells me to disconnect `%s'\n",
675 GNUNET_i2s (target));
679 if (0 == memcmp (target, &s->target, sizeof (struct GNUNET_PeerIdentity)))
681 if (s->inbound == GNUNET_NO)
682 GNUNET_assert (GNUNET_OK == client_disconnect (s));
684 GNUNET_assert (GNUNET_OK == server_disconnect (s));
685 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
687 struct HTTP_Message *msg = s->msg_head;
688 struct HTTP_Message *tmp = s->msg_head;
694 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
695 if (msg->transmit_cont != NULL)
697 msg->transmit_cont (msg->transmit_cont_cls, target, GNUNET_SYSERR);
710 nat_add_address (void *cls, int add_remove, const struct sockaddr *addr,
713 struct Plugin *plugin = cls;
714 struct IPv4HttpAddressWrapper *w_t4 = NULL;
715 struct IPv6HttpAddressWrapper *w_t6 = NULL;
718 af = addr->sa_family;
722 w_t4 = plugin->ipv4_addr_head;
723 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
727 int res = memcmp (&w_t4->addr.ipv4_addr,
729 sizeof (struct in_addr));
733 if (a4->sin_port != w_t4->addr.u4_port)
743 w_t4 = GNUNET_malloc (sizeof (struct IPv4HttpAddressWrapper));
744 memcpy (&w_t4->addr.ipv4_addr, &a4->sin_addr, sizeof (struct in_addr));
745 w_t4->addr.u4_port = a4->sin_port;
747 GNUNET_CONTAINER_DLL_insert (plugin->ipv4_addr_head,
748 plugin->ipv4_addr_tail, w_t4);
751 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
752 "Notifying transport to add IPv4 address `%s'\n",
753 http_plugin_address_to_string (NULL, &w_t4->addr,
757 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
758 sizeof (struct IPv4HttpAddress));
762 w_t6 = plugin->ipv6_addr_head;
763 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
767 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
768 sizeof (struct in6_addr));
772 if (a6->sin6_port != w_t6->addr6.u6_port)
781 w_t6 = GNUNET_malloc (sizeof (struct IPv6HttpAddressWrapper));
783 memcpy (&w_t6->addr6.ipv6_addr, &a6->sin6_addr, sizeof (struct in6_addr));
784 w_t6->addr6.u6_port = a6->sin6_port;
786 GNUNET_CONTAINER_DLL_insert (plugin->ipv6_addr_head,
787 plugin->ipv6_addr_tail, w_t6);
790 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
791 "Notifying transport to add IPv6 address `%s'\n",
792 http_plugin_address_to_string (NULL, &w_t6->addr6,
796 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
797 sizeof (struct IPv6HttpAddress));
806 nat_remove_address (void *cls, int add_remove, const struct sockaddr *addr,
809 struct Plugin *plugin = cls;
810 struct IPv4HttpAddressWrapper *w_t4 = NULL;
811 struct IPv6HttpAddressWrapper *w_t6 = NULL;
814 af = addr->sa_family;
818 w_t4 = plugin->ipv4_addr_head;
819 struct sockaddr_in *a4 = (struct sockaddr_in *) addr;
823 int res = memcmp (&w_t4->addr.ipv4_addr,
825 sizeof (struct in_addr));
829 if (a4->sin_port != w_t4->addr.u4_port)
841 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
842 "Notifying transport to remove IPv4 address `%s'\n",
843 http_plugin_address_to_string (NULL, &w_t4->addr,
847 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t4->addr,
848 sizeof (struct IPv4HttpAddress));
850 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
855 w_t6 = plugin->ipv6_addr_head;
856 struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) addr;
860 int res = memcmp (&w_t6->addr6.ipv6_addr, &a6->sin6_addr,
861 sizeof (struct in6_addr));
865 if (a6->sin6_port != w_t6->addr6.u6_port)
875 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
876 "Notifying transport to remove IPv6 address `%s'\n",
877 http_plugin_address_to_string (NULL, &w_t6->addr6,
881 plugin->env->notify_address (plugin->env->cls, add_remove, &w_t6->addr6,
882 sizeof (struct IPv6HttpAddress));
884 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
895 * Our external IP address/port mapping has changed.
897 * @param cls closure, the 'struct LocalAddrList'
898 * @param add_remove GNUNET_YES to mean the new public IP address, GNUNET_NO to mean
899 * the previous (now invalid) one
900 * @param addr either the previous or the new public IP address
901 * @param addrlen actual lenght of the address
904 nat_port_map_callback (void *cls, int add_remove, const struct sockaddr *addr,
907 GNUNET_assert (cls != NULL);
909 struct Plugin *plugin = cls;
912 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
913 "NPMC called %s to address `%s'\n",
914 (add_remove == GNUNET_NO) ? "remove" : "add",
915 GNUNET_a2s (addr, addrlen));
920 nat_add_address (cls, add_remove, addr, addrlen);
923 nat_remove_address (cls, add_remove, addr, addrlen);
929 http_check_ipv6 (struct Plugin *plugin)
931 struct GNUNET_NETWORK_Handle *desc = NULL;
933 if (plugin->ipv6 == GNUNET_YES)
935 /* probe IPv6 support */
936 desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
939 if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
942 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
944 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, plugin->name,
946 ("Disabling IPv6 since it is not supported on this system!\n"));
947 plugin->ipv6 = GNUNET_NO;
951 GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
955 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
956 "Testing IPv6 on this system: %s\n",
957 (plugin->ipv6 == GNUNET_YES) ? "successful" : "failed");
962 http_get_addresses (struct Plugin *plugin, const char *serviceName,
963 const struct GNUNET_CONFIGURATION_Handle *cfg,
964 struct sockaddr ***addrs, socklen_t ** addr_lens)
967 unsigned long long port;
968 struct addrinfo hints;
969 struct addrinfo *res;
970 struct addrinfo *pos;
971 struct addrinfo *next;
975 struct sockaddr **saddrs;
976 socklen_t *saddrlens;
982 disablev6 = !plugin->ipv6;
985 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
987 GNUNET_break (GNUNET_OK ==
988 GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
992 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
994 ("Require valid port number for service in configuration!\n"));
995 return GNUNET_SYSERR;
999 if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
1001 GNUNET_break (GNUNET_OK ==
1002 GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
1003 "BINDTO", &hostname));
1008 if (hostname != NULL)
1010 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1011 "Resolving `%s' since that is where `%s' will bind to.\n",
1012 hostname, serviceName);
1013 memset (&hints, 0, sizeof (struct addrinfo));
1015 hints.ai_family = AF_INET;
1016 if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
1019 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
1020 hostname, gai_strerror (ret));
1021 GNUNET_free (hostname);
1022 return GNUNET_SYSERR;
1026 while (NULL != (pos = next))
1028 next = pos->ai_next;
1029 if ((disablev6) && (pos->ai_family == AF_INET6))
1035 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1036 _("Failed to find %saddress for `%s'.\n"),
1037 disablev6 ? "IPv4 " : "", hostname);
1039 GNUNET_free (hostname);
1040 return GNUNET_SYSERR;
1043 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1044 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1047 while (NULL != (pos = next))
1049 next = pos->ai_next;
1050 if ((disablev6) && (pos->ai_family == AF_INET6))
1052 if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
1053 continue; /* not TCP */
1054 if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
1055 continue; /* huh? */
1056 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1057 "Service will bind to `%s'\n", GNUNET_a2s (pos->ai_addr,
1059 if (pos->ai_family == AF_INET)
1061 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
1062 saddrlens[i] = pos->ai_addrlen;
1063 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1064 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1065 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1069 GNUNET_assert (pos->ai_family == AF_INET6);
1070 GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
1071 saddrlens[i] = pos->ai_addrlen;
1072 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1073 memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
1074 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1078 GNUNET_free (hostname);
1084 /* will bind against everything, just set port */
1090 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1091 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1093 saddrlens[i] = sizeof (struct sockaddr_in);
1094 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1095 #if HAVE_SOCKADDR_IN_SIN_LEN
1096 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
1098 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1099 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1105 saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
1106 saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
1108 saddrlens[i] = sizeof (struct sockaddr_in6);
1109 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1110 #if HAVE_SOCKADDR_IN_SIN_LEN
1111 ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
1113 ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
1114 ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
1116 saddrlens[i] = sizeof (struct sockaddr_in);
1117 saddrs[i] = GNUNET_malloc (saddrlens[i]);
1118 #if HAVE_SOCKADDR_IN_SIN_LEN
1119 ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
1121 ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
1122 ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
1126 *addr_lens = saddrlens;
1131 start_report_addresses (struct Plugin *plugin)
1133 int res = GNUNET_OK;
1134 struct sockaddr **addrs;
1135 socklen_t *addrlens;
1138 http_get_addresses (plugin, plugin->name, plugin->env->cfg, &addrs,
1140 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1141 _("Found %u addresses to report to NAT service\n"), res);
1143 if (res != GNUNET_SYSERR)
1146 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, plugin->port,
1148 (const struct sockaddr **) addrs, addrlens,
1149 &nat_port_map_callback, NULL, plugin);
1154 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name, _("FREEING %s\n"),
1155 GNUNET_a2s (addrs[res], addrlens[res]));
1157 GNUNET_assert (addrs[res] != NULL);
1158 GNUNET_free (addrs[res]);
1160 GNUNET_free_non_null (addrs);
1161 GNUNET_free_non_null (addrlens);
1166 GNUNET_NAT_register (plugin->env->cfg, GNUNET_YES, 0, 0, NULL, NULL,
1167 NULL, NULL, plugin);
1172 stop_report_addresses (struct Plugin *plugin)
1174 /* Stop NAT handle */
1175 GNUNET_NAT_unregister (plugin->nat);
1177 /* Clean up addresses */
1178 struct IPv4HttpAddressWrapper *w_t4;
1179 struct IPv6HttpAddressWrapper *w_t6;
1181 while (plugin->ipv4_addr_head != NULL)
1183 w_t4 = plugin->ipv4_addr_head;
1184 GNUNET_CONTAINER_DLL_remove (plugin->ipv4_addr_head, plugin->ipv4_addr_tail,
1189 while (plugin->ipv6_addr_head != NULL)
1191 w_t6 = plugin->ipv6_addr_head;
1192 GNUNET_CONTAINER_DLL_remove (plugin->ipv6_addr_head, plugin->ipv6_addr_tail,
1199 configure_plugin (struct Plugin *plugin)
1201 int res = GNUNET_OK;
1204 if (GNUNET_CONFIGURATION_have_value
1205 (plugin->env->cfg, plugin->name, "USE_IPv4"))
1208 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1212 plugin->ipv4 = GNUNET_YES;
1215 if (GNUNET_CONFIGURATION_have_value
1216 (plugin->env->cfg, plugin->name, "USE_IPv6"))
1219 GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg, plugin->name,
1223 plugin->ipv6 = GNUNET_YES;
1225 if ((plugin->ipv4 == GNUNET_NO) && (plugin->ipv6 == GNUNET_NO))
1227 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1229 ("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"),
1231 res = GNUNET_SYSERR;
1234 /* Reading port number from config file */
1235 unsigned long long port;
1238 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1239 "PORT", &port)) || (port > 65535))
1241 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1242 _("Port is required! Fix in configuration\n"),
1244 res = GNUNET_SYSERR;
1247 plugin->port = port;
1249 plugin->client_only = GNUNET_NO;
1250 if (plugin->port == 0)
1252 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1253 _("Port 0, client only mode\n"));
1254 plugin->client_only = GNUNET_YES;
1257 char *bind4_address = NULL;
1259 if ((plugin->ipv4 == GNUNET_YES) &&
1261 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1262 "BINDTO", &bind4_address)))
1264 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1265 "Binding %s plugin to specific IPv4 address: `%s'\n",
1266 plugin->protocol, bind4_address);
1267 plugin->server_addr_v4 = GNUNET_malloc (sizeof (struct sockaddr_in));
1269 inet_pton (AF_INET, bind4_address, &plugin->server_addr_v4->sin_addr))
1271 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1273 ("Specific IPv4 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1274 bind4_address, plugin->protocol);
1275 GNUNET_free (plugin->server_addr_v4);
1276 plugin->server_addr_v4 = NULL;
1280 plugin->server_addr_v4->sin_family = AF_INET;
1281 plugin->server_addr_v4->sin_port = htons (plugin->port);
1283 GNUNET_free (bind4_address);
1287 char *bind6_address = NULL;
1289 if ((plugin->ipv6 == GNUNET_YES) &&
1291 GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg, plugin->name,
1292 "BINDTO6", &bind6_address)))
1294 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1295 "Binding %s plugin to specific IPv6 address: `%s'\n",
1296 plugin->protocol, bind6_address);
1297 plugin->server_addr_v6 = GNUNET_malloc (sizeof (struct sockaddr_in6));
1299 inet_pton (AF_INET6, bind6_address, &plugin->server_addr_v6->sin6_addr))
1301 GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, plugin->name,
1303 ("Specific IPv6 address `%s' for plugin %s in configuration file is invalid! Binding to all addresses!\n"),
1304 bind6_address, plugin->protocol);
1305 GNUNET_free (plugin->server_addr_v6);
1306 plugin->server_addr_v6 = NULL;
1310 plugin->server_addr_v6->sin6_family = AF_INET6;
1311 plugin->server_addr_v6->sin6_port = htons (plugin->port);
1313 GNUNET_free (bind6_address);
1317 /* Optional parameters */
1318 unsigned long long maxneigh;
1321 GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, plugin->name,
1322 "MAX_CONNECTIONS", &maxneigh))
1324 plugin->max_connections = maxneigh;
1331 * Entry point for the plugin.
1334 LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
1336 struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
1337 struct GNUNET_TRANSPORT_PluginFunctions *api;
1338 struct Plugin *plugin;
1341 plugin = GNUNET_malloc (sizeof (struct Plugin));
1343 api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
1345 api->send = &http_plugin_send;
1346 api->disconnect = &http_plugin_disconnect;
1347 api->address_pretty_printer = &http_plugin_address_pretty_printer;
1348 api->check_address = &http_plugin_address_suggested;
1349 api->address_to_string = &http_plugin_address_to_string;
1352 plugin->name = "transport-https";
1353 plugin->protocol = "https";
1355 plugin->name = "transport-http";
1356 plugin->protocol = "http";
1358 /* Configure plugin from configuration */
1359 res = configure_plugin (plugin);
1360 if (res == GNUNET_SYSERR)
1362 GNUNET_free_non_null (plugin->server_addr_v4);
1363 GNUNET_free_non_null (plugin->server_addr_v6);
1364 GNUNET_free (plugin);
1369 /* checking IPv6 support */
1370 http_check_ipv6 (plugin);
1373 res = client_start (plugin);
1374 if (res == GNUNET_SYSERR)
1376 GNUNET_free_non_null (plugin->server_addr_v4);
1377 GNUNET_free_non_null (plugin->server_addr_v6);
1378 GNUNET_free (plugin);
1384 if (plugin->client_only == GNUNET_NO)
1386 res = server_start (plugin);
1387 if (res == GNUNET_SYSERR)
1389 server_stop (plugin);
1390 client_stop (plugin);
1392 GNUNET_free_non_null (plugin->server_addr_v4);
1393 GNUNET_free_non_null (plugin->server_addr_v6);
1394 GNUNET_free (plugin);
1399 /* Report addresses to transport service */
1400 start_report_addresses (plugin);
1403 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1404 "Plugin `%s' loaded\n", plugin->name);
1412 * Exit point from the plugin.
1415 LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
1417 struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
1418 struct Plugin *plugin = api->cls;
1419 struct Session *s = NULL;
1421 /* Stop reporting addresses to transport service */
1422 stop_report_addresses (plugin);
1424 /* cleaning up sessions */
1429 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1430 "Disconnecting `%s' \n", GNUNET_i2s (&s->target));
1432 if (s->inbound == GNUNET_NO)
1433 GNUNET_assert (GNUNET_OK == client_disconnect (s));
1435 GNUNET_assert (GNUNET_OK == server_disconnect (s));
1440 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping server\n");
1443 server_stop (plugin);
1446 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name, "Stopping client\n");
1449 client_stop (plugin);
1451 /* deleting up sessions */
1455 struct Session *t = s->next;
1457 GNUNET_CONTAINER_DLL_remove (plugin->head, plugin->tail, s);
1459 struct HTTP_Message *msg = s->msg_head;
1460 struct HTTP_Message *tmp = s->msg_head;
1466 GNUNET_CONTAINER_DLL_remove (s->msg_head, s->msg_tail, msg);
1467 if (msg->transmit_cont != NULL)
1469 msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_SYSERR);
1481 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
1482 "Plugin `%s' unloaded\n", plugin->name);
1485 GNUNET_free_non_null (plugin->server_addr_v4);
1486 GNUNET_free_non_null (plugin->server_addr_v6);
1487 GNUNET_free (plugin);
1493 /* end of plugin_transport_http.c */