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13 General Public License for more details.
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22 * @file transport/plugin_transport_http.h
23 * @brief http transport service plugin
24 * @author Matthias Wachs
28 #include "gnunet_common.h"
29 #include "gnunet_constants.h"
30 #include "gnunet_protocols.h"
31 #include "gnunet_connection_lib.h"
32 #include "gnunet_service_lib.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet_transport_service.h"
35 #include "gnunet_resolver_service.h"
36 #include "gnunet_server_lib.h"
37 #include "gnunet_container_lib.h"
38 #include "gnunet_transport_plugin.h"
39 #include "gnunet_os_lib.h"
40 #include "gnunet_nat_lib.h"
41 #include "microhttpd.h"
42 #include <curl/curl.h>
45 #define DEBUG_HTTP GNUNET_EXTRA_LOGGING
46 #define VERBOSE_SERVER GNUNET_EXTRA_LOGGING
47 #define VERBOSE_CLIENT GNUNET_EXTRA_LOGGING
48 #define VERBOSE_CURL GNUNET_NO
51 #define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_https_init
52 #define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_https_done
54 #define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_http_init
55 #define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_http_done
58 #define INBOUND GNUNET_YES
59 #define OUTBOUND GNUNET_NO
62 #define HTTP_NOT_VALIDATED_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
65 * Encapsulation of all of the state of the plugin.
77 struct GNUNET_TRANSPORT_PluginEnvironment *env;
80 * Linked list of open sessions.
88 * NAT handle & address management
90 struct GNUNET_NAT_Handle *nat;
93 * List of own addresses
97 * IPv4 addresses DLL head
99 struct HttpAddressWrapper *addr_head;
102 * IPv4 addresses DLL tail
104 struct HttpAddressWrapper *addr_tail;
108 * Plugin configuration
109 * --------------------
113 * External hostname the plugin can be connected to, can be different to
114 * the host's FQDN, used e.g. for reverse proxying
116 char *external_hostname;
119 * External hostname the plugin can be connected to, can be different to
120 * the host's FQDN, used e.g. for reverse proxying
122 struct HttpAddress *ext_addr;
125 * External address length
130 * Task calling transport service about external address
132 GNUNET_SCHEDULER_TaskIdentifier notify_ext_task;
137 * Equals configuration section: transport-http, transport-https
149 * GNUNET_YES or GNUNET_NO
155 * GNUNET_YES or GNUNET_NO
160 * Does plugin just use outbound connections and not accept inbound?
171 * Maximum number of sockets the plugin can use
172 * Each http inbound /outbound connections are two connections
177 * Number of outbound sessions
179 unsigned int outbound_sessions;
182 * Number of inbound sessions
184 unsigned int inbound_sessions;
187 * Plugin HTTPS SSL/TLS options
188 * ----------------------------
192 * libCurl TLS crypto init string, can be set to enhance performance
196 * Use RC4-128 instead of AES:
197 * NONE:+VERS-TLS1.0:+ARCFOUR-128:+SHA1:+RSA:+COMP-NULL
218 * Current number of establishes connections
223 * Last used unique HTTP connection tag
235 struct MHD_Daemon *server_v4;
240 GNUNET_SCHEDULER_TaskIdentifier server_v4_task;
243 * The IPv4 server is scheduled to run asap
245 int server_v4_immediately;
250 struct MHD_Daemon *server_v6;
255 GNUNET_SCHEDULER_TaskIdentifier server_v6_task;
258 * The IPv6 server is scheduled to run asap
261 int server_v6_immediately;
264 * IPv4 server socket to bind to
266 struct sockaddr_in *server_addr_v4;
269 * IPv6 server socket to bind to
271 struct sockaddr_in6 *server_addr_v6;
274 * Server semi connections
275 * A full session consists of 2 semi-connections: send and receive
276 * If not both directions are established the server keeps this sessions here
278 struct Session *server_semi_head;
280 struct Session *server_semi_tail;
294 GNUNET_SCHEDULER_TaskIdentifier client_perform_task;
298 GNUNET_NETWORK_STRUCT_BEGIN
301 * HTTP addresses including a full URI
306 * Length of the address following in NBO
308 uint32_t addr_len GNUNET_PACKED;
313 void *addr GNUNET_PACKED;
319 struct IPv4HttpAddress
322 * IPv4 address, in network byte order.
324 uint32_t ipv4_addr GNUNET_PACKED;
327 * Port number, in network byte order.
329 uint16_t u4_port GNUNET_PACKED;
335 struct IPv6HttpAddress
340 struct in6_addr ipv6_addr GNUNET_PACKED;
343 * Port number, in network byte order.
345 uint16_t u6_port GNUNET_PACKED;
347 GNUNET_NETWORK_STRUCT_END
350 struct ServerConnection
355 /* Should this connection get disconnected? GNUNET_YES/NO */
358 /* The session this server connection belongs to */
359 struct Session *session;
361 /* The MHD connection */
362 struct MHD_Connection *mhd_conn;
368 * Session handle for connections.
373 * To whom are we talking to
375 struct GNUNET_PeerIdentity target;
378 * Stored in a linked list.
380 struct Session *next;
383 * Stored in a linked list.
385 struct Session *prev;
388 * Pointer to the global plugin struct.
390 struct Plugin *plugin;
403 * ATS network type in NBO
405 uint32_t ats_address_network_type;
408 * next pointer for double linked list
410 struct HTTP_Message *msg_head;
413 * previous pointer for double linked list
415 struct HTTP_Message *msg_tail;
419 * Message stream tokenizer for incoming data
421 struct GNUNET_SERVER_MessageStreamTokenizer *msg_tk;
424 * Absolute time when to receive data again
425 * Used for receive throttling
427 struct GNUNET_TIME_Absolute next_receive;
430 * Inbound or outbound connection
431 * Outbound: GNUNET_NO (client is used to send and receive)
432 * Inbound : GNUNET_YES (server is used to send and receive)
437 * Unique HTTP/S connection tag for this connection
451 * Client receive handle
456 * Task to wake up client receive handle when receiving is allowed again
458 GNUNET_SCHEDULER_TaskIdentifier recv_wakeup_task;
461 * Session timeout task
463 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
466 * Is client send handle paused since there are no data to send?
469 int client_put_paused;
478 struct ServerConnection *server_recv;
483 struct ServerConnection *server_send;
487 * Message to send using http
492 * next pointer for double linked list
494 struct HTTP_Message *next;
497 * previous pointer for double linked list
499 struct HTTP_Message *prev;
502 * buffer containing data to send
507 * amount of data already sent
517 * Continuation function to call once the transmission buffer
518 * has again space available. NULL if there is no
519 * continuation to call.
521 GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
524 * Closure for transmit_cont.
526 void *transmit_cont_cls;
530 create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
531 const void *addr, size_t addrlen);
534 exist_session (struct Plugin *plugin, struct Session *s);
537 delete_session (struct Session *s);
540 exist_session (struct Plugin *plugin, struct Session *s);
542 struct GNUNET_TIME_Relative
543 http_plugin_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
544 const struct GNUNET_MessageHeader *message,
545 struct Session *session, const char *sender_address,
546 uint16_t sender_address_len);
549 http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen);
552 client_disconnect (struct Session *s);
555 client_connect (struct Session *s);
558 client_send (struct Session *s, struct HTTP_Message *msg);
561 client_start (struct Plugin *plugin);
564 client_stop (struct Plugin *plugin);
567 server_disconnect (struct Session *s);
570 server_send (struct Session *s, struct HTTP_Message *msg);
573 server_start (struct Plugin *plugin);
576 server_stop (struct Plugin *plugin);
579 notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
582 /* end of plugin_transport_http.h */