1 files changed, 504 insertions, 0 deletions
diff --git a/src/transport/plugin_transport_http.h b/src/transport/plugin_transport_http.h
new file mode 100644
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+++ b/src/transport/plugin_transport_http.h
@@ -0,0 +1,504 @@
+/*
+     This file is part of GNUnet
+     (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file transport/plugin_transport_http.h
+ * @brief http transport service plugin
+ * @author Matthias Wachs
+ */
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_constants.h"
+#include "gnunet_protocols.h"
+#include "gnunet_connection_lib.h"
+#include "gnunet_service_lib.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_transport_service.h"
+#include "gnunet_resolver_service.h"
+#include "gnunet_server_lib.h"
+#include "gnunet_container_lib.h"
+#include "gnunet_transport_plugin.h"
+#include "gnunet_os_lib.h"
+#include "gnunet_nat_lib.h"
+#include "microhttpd.h"
+#include <curl/curl.h>
+
+
+#define DEBUG_HTTP GNUNET_EXTRA_LOGGING
+#define VERBOSE_SERVER GNUNET_EXTRA_LOGGING
+#define VERBOSE_CLIENT GNUNET_EXTRA_LOGGING
+#define VERBOSE_CURL GNUNET_EXTRA_LOGGING
+
+#if BUILD_HTTPS
+#define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_https_init
+#define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_https_done
+#else
+#define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_http_init
+#define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_http_done
+#endif
+
+#define INBOUND  GNUNET_YES
+#define OUTBOUND GNUNET_NO
+
+
+#define HTTP_NOT_VALIDATED_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
+
+/**
+ * Encapsulation of all of the state of the plugin.
+ */
+struct Plugin
+{
+  /**
+   * General handles
+   * ---------------
+   */
+
+  /**
+   * Our environment.
+   */
+  struct GNUNET_TRANSPORT_PluginEnvironment *env;
+
+  /**
+   * Linked list of open sessions.
+   */
+
+  struct Session *head;
+
+  struct Session *tail;
+
+  /**
+   * NAT handle & address management
+   */
+  struct GNUNET_NAT_Handle *nat;
+
+  /**
+   * List of own addresses
+   */
+
+  /**
+   * IPv4 addresses DLL head
+   */
+  struct IPv4HttpAddressWrapper *ipv4_addr_head;
+
+  /**
+   * IPv4 addresses DLL tail
+   */
+  struct IPv4HttpAddressWrapper *ipv4_addr_tail;
+
+  /**
+   * IPv6 addresses DLL head
+   */
+  struct IPv6HttpAddressWrapper *ipv6_addr_head;
+
+  /**
+   * IPv6 addresses DLL tail
+   */
+  struct IPv6HttpAddressWrapper *ipv6_addr_tail;
+
+  /**
+   * Plugin configuration
+   * --------------------
+   */
+
+  /**
+   * Plugin name
+   * Equals configuration section: transport-http, transport-https
+   */
+  char *name;
+
+  /**
+   * Plugin protocol
+   * http, https
+   */
+  char *protocol;
+
+  /**
+   * Use IPv4?
+   * GNUNET_YES or GNUNET_NO
+   */
+  int ipv4;
+
+  /**
+   * Use IPv6?
+   * GNUNET_YES or GNUNET_NO
+   */
+  int ipv6;
+
+  /**
+   * Does plugin just use outbound connections and not accept inbound?
+   */
+
+  int client_only;
+
+  /**
+   * Port used
+   */
+  uint16_t port;
+
+  /**
+   * Maximum number of sockets the plugin can use
+   * Each http inbound /outbound connections are two connections
+   */
+  int max_connections;
+
+  /**
+   * Plugin HTTPS SSL/TLS options
+   * ----------------------------
+   */
+
+  /**
+   * libCurl TLS crypto init string, can be set to enhance performance
+   *
+   * Example:
+   *
+   * Use RC4-128 instead of AES:
+   * NONE:+VERS-TLS1.0:+ARCFOUR-128:+SHA1:+RSA:+COMP-NULL
+   *
+   */
+  char *crypto_init;
+
+  /**
+   * TLS key
+   */
+  char *key;
+
+  /**
+   * TLS certificate
+   */
+  char *cert;
+
+  /**
+   * Plugin values
+   * -------------
+   */
+
+  /**
+   * Current number of establishes connections
+   */
+  int cur_connections;
+
+  /**
+   * Last used unique HTTP connection tag
+   */
+  uint32_t last_tag;
+
+  /**
+   * Server handles
+   * --------------
+   */
+
+  /**
+   * MHD IPv4 daemon
+   */
+  struct MHD_Daemon *server_v4;
+
+  /**
+   * MHD IPv4 task
+   */
+  GNUNET_SCHEDULER_TaskIdentifier server_v4_task;
+
+  /**
+   * MHD IPv6 daemon
+   */
+  struct MHD_Daemon *server_v6;
+
+  /**
+   * MHD IPv4 task
+   */
+  GNUNET_SCHEDULER_TaskIdentifier server_v6_task;
+
+  /**
+   * IPv4 server socket to bind to
+   */
+  struct sockaddr_in *server_addr_v4;
+
+  /**
+   * IPv6 server socket to bind to
+   */
+  struct sockaddr_in6 *server_addr_v6;
+
+  /**
+   * Server semi connections
+   * A full session consists of 2 semi-connections: send and receive
+   * If not both directions are established the server keeps this sessions here
+   */
+  struct Session *server_semi_head;
+
+  struct Session *server_semi_tail;
+
+  /*
+   * Client handles
+   */
+
+  /**
+   * cURL Multihandle
+   */
+  CURLM *client_mh;
+
+  /**
+   * curl perform task
+   */
+  GNUNET_SCHEDULER_TaskIdentifier client_perform_task;
+
+};
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * IPv4 addresses
+ */
+struct IPv4HttpAddress
+{
+  /**
+   * IPv4 address, in network byte order.
+   */
+  uint32_t ipv4_addr GNUNET_PACKED;
+
+  /**
+   * Port number, in network byte order.
+   */
+  uint16_t u4_port GNUNET_PACKED;
+};
+
+/**
+ * IPv4 addresses
+ */
+struct IPv6HttpAddress
+{
+  /**
+   * IPv6 address.
+   */
+  struct in6_addr ipv6_addr GNUNET_PACKED;
+
+  /**
+   * Port number, in network byte order.
+   */
+  uint16_t u6_port GNUNET_PACKED;
+};
+GNUNET_NETWORK_STRUCT_END
+
+/**
+ * Session handle for connections.
+ */
+struct Session
+{
+
+  /**
+   * Stored in a linked list.
+   */
+  struct Session *next;
+
+  /**
+   * Stored in a linked list.
+   */
+  struct Session *prev;
+
+  /**
+   * Pointer to the global plugin struct.
+   */
+  struct Plugin *plugin;
+
+  /**
+   * Address
+   */
+  void *addr;
+
+  /**
+   * Address length
+   */
+  size_t addrlen;
+
+  /**
+   * ATS network type in NBO
+   */
+  uint32_t ats_address_network_type;
+
+  /**
+   * To whom are we talking to
+   */
+  struct GNUNET_PeerIdentity target;
+
+  /**
+   * next pointer for double linked list
+   */
+  struct HTTP_Message *msg_head;
+
+  /**
+   * previous pointer for double linked list
+   */
+  struct HTTP_Message *msg_tail;
+
+
+  /**
+   * Message stream tokenizer for incoming data
+   */
+  struct GNUNET_SERVER_MessageStreamTokenizer *msg_tk;
+
+  /**
+   * Absolute time when to receive data again
+   * Used for receive throttling
+   */
+  struct GNUNET_TIME_Absolute next_receive;
+
+  /**
+   * Inbound or outbound connection
+   * Outbound: GNUNET_NO (client is used to send and receive)
+   * Inbound : GNUNET_YES (server is used to send and receive)
+   */
+  int inbound;
+
+  /**
+   * Unique HTTP/S connection tag for this connection
+   */
+  uint32_t tag;
+
+  /**
+   * Client handles
+   */
+
+  /**
+   * Client send handle
+   */
+  void *client_put;
+
+  /**
+   * Client receive handle
+   */
+  void *client_get;
+
+  /**
+   * Task to wake up client receive handle when receiving is allowed again
+   */
+  GNUNET_SCHEDULER_TaskIdentifier recv_wakeup_task;
+
+  /**
+   * Is client send handle paused since there are no data to send?
+   * GNUNET_YES/NO
+   */
+  int client_put_paused;
+
+  /**
+   * Server handles
+   */
+
+  /**
+   * Client send handle
+   */
+  void *server_recv;
+
+  /**
+   * Client send handle
+   */
+  void *server_send;
+};
+
+/**
+ *  Message to send using http
+ */
+struct HTTP_Message
+{
+  /**
+   * next pointer for double linked list
+   */
+  struct HTTP_Message *next;
+
+  /**
+   * previous pointer for double linked list
+   */
+  struct HTTP_Message *prev;
+
+  /**
+   * buffer containing data to send
+   */
+  char *buf;
+
+  /**
+   * amount of data already sent
+   */
+  size_t pos;
+
+  /**
+   * buffer length
+   */
+  size_t size;
+
+  /**
+   * Continuation function to call once the transmission buffer
+   * has again space available.  NULL if there is no
+   * continuation to call.
+   */
+  GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
+
+  /**
+   * Closure for transmit_cont.
+   */
+  void *transmit_cont_cls;
+};
+
+void
+delete_session (struct Session *s);
+
+struct Session *
+create_session (struct Plugin *plugin, const struct GNUNET_PeerIdentity *target,
+                const void *addr, size_t addrlen,
+                GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls);
+
+struct GNUNET_TIME_Relative
+http_plugin_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
+                     const struct GNUNET_MessageHeader *message,
+                     struct Session *session, const char *sender_address,
+                     uint16_t sender_address_len);
+
+const char *
+http_plugin_address_to_string (void *cls, const void *addr, size_t addrlen);
+
+int
+client_disconnect (struct Session *s);
+
+int
+client_connect (struct Session *s);
+
+int
+client_send (struct Session *s, struct HTTP_Message *msg);
+
+int
+client_start (struct Plugin *plugin);
+
+void
+client_stop (struct Plugin *plugin);
+
+int
+server_disconnect (struct Session *s);
+
+int
+server_send (struct Session *s, struct HTTP_Message *msg);
+
+int
+server_start (struct Plugin *plugin);
+
+void
+server_stop (struct Plugin *plugin);
+
+void
+notify_session_end (void *cls, const struct GNUNET_PeerIdentity *peer,
+                    struct Session *s);
+
+/* end of plugin_transport_http.h */