/*
This file is part of GNUnet
- (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2002-2014, 2017 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
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.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* @file transport/plugin_transport_http_server.c
* @brief HTTP/S server transport plugin
* @author Matthias Wachs
+ * @author David Barksdale
+ * @author Christian Grothoff
*/
-
#include "platform.h"
-#include "gnunet_protocols.h"
-#include "gnunet_connection_lib.h"
-#include "gnunet_server_lib.h"
-#include "gnunet_service_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_statistics_service.h"
-#include "gnunet_transport_service.h"
#include "gnunet_transport_plugin.h"
+#include "gnunet_nat_service.h"
+#include "plugin_transport_http_common.h"
+#include <microhttpd.h>
+#include <regex.h>
+
+
#if BUILD_HTTPS
+#define PLUGIN_NAME "https_server"
#define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_https_server_init
#define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_https_server_done
#else
+#define PLUGIN_NAME "http_server"
#define LIBGNUNET_PLUGIN_TRANSPORT_INIT libgnunet_plugin_transport_http_server_init
#define LIBGNUNET_PLUGIN_TRANSPORT_DONE libgnunet_plugin_transport_http_server_done
#endif
+#define HTTP_ERROR_RESPONSE "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD><BODY><H1>Not Found</H1>The requested URL was not found on this server.<P><HR><ADDRESS></ADDRESS></BODY></HTML>"
+#define _RECEIVE 0
+#define _SEND 1
+
+
+#define LOG(kind,...) GNUNET_log_from (kind, "transport-" PLUGIN_NAME,__VA_ARGS__)
-#define DEBUG_TEMPLATE GNUNET_EXTRA_LOGGING
/**
- * After how long do we expire an address that we
- * learned from another peer if it is not reconfirmed
- * by anyone?
+ * Information we keep with MHD for an HTTP request.
*/
-#define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
+struct ServerRequest
+{
+ /**
+ * The session this server request belongs to
+ * Can be NULL, when session was disconnected and freed
+ */
+ struct GNUNET_ATS_Session *session;
+
+ /**
+ * The MHD connection
+ */
+ struct MHD_Connection *mhd_conn;
+
+ /**
+ * The MHD daemon
+ */
+ struct MHD_Daemon *mhd_daemon;
+
+ /**
+ * Options requested by peer
+ */
+ uint32_t options;
+#define OPTION_LONG_POLL 1 /* GET request wants long-poll semantics */
+
+ /**
+ * _RECV or _SEND
+ */
+ int direction;
+
+ /**
+ * For PUT requests: Is this the first or last callback with size 0
+ * For GET requests: Have we sent a message
+ */
+ int connected;
+
+ /**
+ * Currently suspended
+ */
+ bool suspended;
+
+};
/**
- * Encapsulation of all of the state of the plugin.
+ * Wrapper to manage addresses
*/
-struct Plugin;
+struct HttpAddressWrapper
+{
+ /**
+ * Linked list next
+ */
+ struct HttpAddressWrapper *next;
+
+ /**
+ * Linked list previous
+ */
+ struct HttpAddressWrapper *prev;
+
+ /**
+ * An address we are using.
+ */
+ struct HttpAddress *address;
+
+ /**
+ * Length of the address.
+ */
+ size_t addrlen;
+};
/**
- * Session handle for connections.
+ * Message to send using http
*/
-struct Session
+struct HTTP_Message
{
/**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
+ * next pointer for double linked list
*/
- struct GNUNET_PeerIdentity sender;
+ struct HTTP_Message *next;
/**
- * Stored in a linked list.
+ * previous pointer for double linked list
*/
- struct Session *next;
+ struct HTTP_Message *prev;
/**
- * Pointer to the global plugin struct.
+ * buffer containing data to send
+ */
+ char *buf;
+
+ /**
+ * amount of data already sent
+ */
+ size_t pos;
+
+ /**
+ * buffer length
*/
- struct Plugin *plugin;
+ size_t size;
/**
- * The client (used to identify this connection)
+ * HTTP/S specific overhead
*/
- /* void *client; */
+ size_t overhead;
/**
* Continuation function to call once the transmission buffer
* Closure for transmit_cont.
*/
void *transmit_cont_cls;
+};
+
+
+/**
+ * Session handle for connections.
+ */
+struct GNUNET_ATS_Session
+{
+
+ /**
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message)
+ */
+ struct GNUNET_PeerIdentity target;
/**
- * At what time did we reset last_received last?
+ * Pointer to the global plugin struct.
+ */
+ struct HTTP_Server_Plugin *plugin;
+
+ /**
+ * 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_MessageStreamTokenizer *msg_tk;
+
+ /**
+ * Client recv handle
+ */
+ struct ServerRequest *server_recv;
+
+ /**
+ * Client send handle
+ */
+ struct ServerRequest *server_send;
+
+ /**
+ * Address
+ */
+ struct GNUNET_HELLO_Address *address;
+
+ /**
+ * Absolute time when to receive data again
+ * Used for receive throttling
+ */
+ struct GNUNET_TIME_Absolute next_receive;
+
+ /**
+ * Absolute time when this connection will time out.
+ */
+ struct GNUNET_TIME_Absolute timeout;
+
+ /**
+ * Session timeout task
+ */
+ struct GNUNET_SCHEDULER_Task * timeout_task;
+
+ /**
+ * Task to resume MHD handling when receiving is allowed again
+ */
+ struct GNUNET_SCHEDULER_Task * recv_wakeup_task;
+
+ /**
+ * Number of bytes waiting for transmission to this peer.
+ */
+ unsigned long long bytes_in_queue;
+
+ /**
+ * Number of messages waiting for transmission to this peer.
+ */
+ unsigned int msgs_in_queue;
+
+ /**
+ * Unique HTTP/S connection tag for this connection
*/
- struct GNUNET_TIME_Absolute last_quota_update;
+ uint32_t tag;
/**
- * How many bytes have we received since the "last_quota_update"
- * timestamp?
+ * ATS network type.
*/
- uint64_t last_received;
+ enum GNUNET_ATS_Network_Type scope;
/**
- * Number of bytes per ms that this peer is allowed
- * to send to us.
+ * #GNUNET_YES if this session is known to the service.
*/
- uint32_t quota;
+ int known_to_service;
};
+
/**
* Encapsulation of all of the state of the plugin.
*/
-struct Plugin
+struct HTTP_Server_Plugin
{
/**
* Our environment.
struct GNUNET_TRANSPORT_PluginEnvironment *env;
/**
- * List of open sessions.
+ * Hash map of open sessions.
+ */
+ struct GNUNET_CONTAINER_MultiPeerMap *sessions;
+
+ /**
+ * Function to call about session status changes.
+ */
+ GNUNET_TRANSPORT_SessionInfoCallback sic;
+
+ /**
+ * Closure for @e sic.
+ */
+ void *sic_cls;
+
+ /**
+ * Plugin name
+ */
+ char *name;
+
+ /**
+ * Protocol
+ */
+ char *protocol;
+
+ /**
+ * External address
+ */
+ char *external_hostname;
+
+ /**
+ * External hostname the plugin can be connected to, can be different to
+ * the host's FQDN, used e.g. for reverse proxying
+ */
+ struct GNUNET_HELLO_Address *ext_addr;
+
+ /**
+ * NAT handle & address management
+ */
+ struct GNUNET_NAT_Handle *nat;
+
+ /**
+ * IPv4 addresses DLL head
+ */
+ struct HttpAddressWrapper *addr_head;
+
+ /**
+ * IPv4 addresses DLL tail
+ */
+ struct HttpAddressWrapper *addr_tail;
+
+ /**
+ * IPv4 server socket to bind to
+ */
+ struct sockaddr_in *server_addr_v4;
+
+ /**
+ * IPv6 server socket to bind to
+ */
+ struct sockaddr_in6 *server_addr_v6;
+
+ /**
+ * MHD IPv4 daemon
+ */
+ struct MHD_Daemon *server_v4;
+
+ /**
+ * MHD IPv4 daemon
+ */
+ struct MHD_Daemon *server_v6;
+
+#if BUILD_HTTPS
+ /**
+ * Crypto related
+ *
+ * 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;
+#endif
+
+ /**
+ * MHD IPv4 task
+ */
+ struct GNUNET_SCHEDULER_Task *server_v4_task;
+
+ /**
+ * MHD IPv6 task
+ */
+ struct GNUNET_SCHEDULER_Task *server_v6_task;
+
+ /**
+ * Task calling transport service about external address
+ */
+ struct GNUNET_SCHEDULER_Task *notify_ext_task;
+
+ /**
+ * Notify transport only about external address
+ */
+ unsigned int external_only;
+
+ /**
+ * The IPv4 server is scheduled to run asap
+ */
+ int server_v4_immediately;
+
+ /**
+ * The IPv6 server is scheduled to run asap
+ */
+ int server_v6_immediately;
+
+ /**
+ * Verify external address
+ */
+ int verify_external_hostname;
+
+ /**
+ * Maximum number of sockets the plugin can use
+ * Each http request /request connections are two connections
+ */
+ unsigned int max_request;
+
+ /**
+ * Current number of sockets the plugin can use
+ * Each http connection are two requests
+ */
+ unsigned int cur_request;
+
+ /**
+ * Did we immediately end the session in disconnect_cb
+ */
+ int in_shutdown;
+
+ /**
+ * Length of peer id
+ */
+ int peer_id_length;
+
+ /**
+ * My options to be included in the address
+ */
+ uint32_t options;
+
+ /**
+ * use IPv6
+ */
+ uint16_t use_ipv6;
+
+ /**
+ * use IPv4
+ */
+ uint16_t use_ipv4;
+
+ /**
+ * Port used
*/
- struct Session *sessions;
+ uint16_t port;
+
+ /**
+ * Regex for parsing URLs. FIXME: this seems overkill.
+ */
+ regex_t url_regex;
};
/**
- * Function that can be used by the transport service to transmit
- * a message using the plugin. Note that in the case of a
- * peer disconnecting, the continuation MUST be called
- * prior to the disconnect notification itself. This function
- * will be called with this peer's HELLO message to initiate
- * a fresh connection to another peer.
+ * If a session monitor is attached, notify it about the new
+ * session state.
*
- * @param cls closure
- * @param session which session must be used
- * @param msgbuf the message to transmit
- * @param msgbuf_size number of bytes in 'msgbuf'
- * @param priority how important is the message (most plugins will
- * ignore message priority and just FIFO)
- * @param to how long to wait at most for the transmission (does not
- * require plugins to discard the message after the timeout,
- * just advisory for the desired delay; most plugins will ignore
- * this as well)
- * @param cont continuation to call once the message has
- * been transmitted (or if the transport is ready
- * for the next transmission call; or if the
- * peer disconnected...); can be NULL
- * @param cont_cls closure for cont
- * @return number of bytes used (on the physical network, with overheads);
- * -1 on hard errors (i.e. address invalid); 0 is a legal value
- * and does NOT mean that the message was not transmitted (DV)
+ * @param plugin our plugin
+ * @param session session that changed state
+ * @param state new state of the session
*/
-static ssize_t
-http_server_plugin_send (void *cls,
- struct Session *session,
- const char *msgbuf, size_t msgbuf_size,
- unsigned int priority,
- struct GNUNET_TIME_Relative to,
- GNUNET_TRANSPORT_TransmitContinuation cont, void *cont_cls)
+static void
+notify_session_monitor (struct HTTP_Server_Plugin *plugin,
+ struct GNUNET_ATS_Session *session,
+ enum GNUNET_TRANSPORT_SessionState state)
{
- struct Plugin *plugin = cls;
- int bytes_sent = 0;
+ struct GNUNET_TRANSPORT_SessionInfo info;
- GNUNET_assert (plugin != NULL);
- GNUNET_assert (session != NULL);
-
- /* struct Plugin *plugin = cls; */
- return bytes_sent;
+ if (NULL == plugin->sic)
+ return;
+ memset (&info, 0, sizeof (info));
+ info.state = state;
+ info.is_inbound = GNUNET_YES;
+ info.num_msg_pending = session->msgs_in_queue;
+ info.num_bytes_pending = session->bytes_in_queue;
+ info.receive_delay = session->next_receive;
+ info.session_timeout = session->timeout;
+ info.address = session->address;
+ plugin->sic (plugin->sic_cls,
+ session,
+ &info);
}
-
/**
- * Function that can be used to force the plugin to disconnect
- * from the given peer and cancel all previous transmissions
- * (and their continuationc).
+ * Wake up an MHD connection which was suspended
*
- * @param cls closure
- * @param target peer from which to disconnect
+ * @param cls the session
*/
static void
-http_server_plugin_disconnect (void *cls, const struct GNUNET_PeerIdentity *target)
+server_wake_up (void *cls)
{
- // struct Plugin *plugin = cls;
- // FIXME
+ struct GNUNET_ATS_Session *s = cls;
+
+ s->recv_wakeup_task = NULL;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p: Waking up PUT handle\n",
+ s);
+ GNUNET_assert (s->server_recv->suspended);
+ MHD_resume_connection (s->server_recv->mhd_conn);
+ s->server_recv->suspended = false;
}
/**
- * Convert the transports address to a nice, human-readable
- * format.
+ * Reschedule the execution of both IPv4 and IPv6 server.
*
- * @param cls closure
- * @param type name of the transport that generated the address
- * @param addr one of the addresses of the host, NULL for the last address
- * the specific address format depends on the transport
- * @param addrlen length of the address
- * @param numeric should (IP) addresses be displayed in numeric form?
- * @param timeout after how long should we give up?
- * @param asc function to call on each string
- * @param asc_cls closure for asc
+ * @param plugin the plugin
+ * @param server which server to schedule v4 or v6?
+ * @param now #GNUNET_YES to schedule execution immediately, #GNUNET_NO to wait
+ * until timeout
*/
static void
-http_server_plugin_address_pretty_printer (void *cls, const char *type,
- const void *addr, size_t addrlen,
- int numeric,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_TRANSPORT_AddressStringCallback
- asc, void *asc_cls)
-{
- asc (asc_cls, NULL);
-}
-
+server_reschedule (struct HTTP_Server_Plugin *plugin,
+ struct MHD_Daemon *server,
+ int now);
/**
- * Another peer has suggested an address for this
- * peer and transport plugin. Check that this could be a valid
- * address. If so, consider adding it to the list
- * of addresses.
+ * Deletes the session. Must not be used afterwards.
*
- * @param cls closure
- * @param addr pointer to the address
- * @param addrlen length of addr
- * @return GNUNET_OK if this is a plausible address for this peer
- * and transport
+ * @param s the session to delete
*/
-static int
-http_server_plugin_address_suggested (void *cls, const void *addr, size_t addrlen)
+static void
+server_delete_session (struct GNUNET_ATS_Session *s)
{
- /* struct Plugin *plugin = cls; */
+ struct HTTP_Server_Plugin *plugin = s->plugin;
+ struct HTTP_Message *msg;
- /* check if the address is plausible; if so,
- * add it to our list! */
- return GNUNET_OK;
+ if (NULL != s->timeout_task)
+ {
+ GNUNET_SCHEDULER_cancel (s->timeout_task);
+ s->timeout_task = NULL;
+ s->timeout = GNUNET_TIME_UNIT_ZERO_ABS;
+ }
+ if (NULL != s->recv_wakeup_task)
+ {
+ GNUNET_SCHEDULER_cancel (s->recv_wakeup_task);
+ s->recv_wakeup_task = NULL;
+ if (NULL != s->server_recv)
+ {
+ GNUNET_assert (s->server_recv->suspended);
+ s->server_recv->suspended = false;
+ MHD_resume_connection (s->server_recv->mhd_conn);
+ }
+ }
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multipeermap_remove (plugin->sessions,
+ &s->target,
+ s));
+ while (NULL != (msg = s->msg_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (s->msg_head,
+ s->msg_tail,
+ msg);
+ if (NULL != msg->transmit_cont)
+ msg->transmit_cont (msg->transmit_cont_cls,
+ &s->target,
+ GNUNET_SYSERR,
+ msg->size,
+ msg->pos + msg->overhead);
+ GNUNET_assert (s->msgs_in_queue > 0);
+ s->msgs_in_queue--;
+ GNUNET_assert (s->bytes_in_queue >= msg->size);
+ s->bytes_in_queue -= msg->size;
+ GNUNET_free (msg);
+ }
+
+ GNUNET_assert (0 == s->msgs_in_queue);
+ GNUNET_assert (0 == s->bytes_in_queue);
+
+ if (NULL != s->server_send)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Server: %p / %p Terminating inbound PUT session to peer `%s'\n",
+ s, s->server_send,
+ GNUNET_i2s (&s->target));
+ s->server_send->session = NULL;
+ MHD_set_connection_option (s->server_send->mhd_conn,
+ MHD_CONNECTION_OPTION_TIMEOUT,
+ 1 /* 0 = no timeout, so this is MIN */);
+ if (s->server_send->suspended)
+ {
+ s->server_send->suspended = false;
+ MHD_resume_connection (s->server_send->mhd_conn);
+ }
+ server_reschedule (plugin,
+ s->server_send->mhd_daemon,
+ GNUNET_YES);
+ }
+
+ if (NULL != s->server_recv)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Server: %p / %p Terminating inbound GET session to peer `%s'\n",
+ s, s->server_recv, GNUNET_i2s (&s->target));
+ s->server_recv->session = NULL;
+ MHD_set_connection_option (s->server_recv->mhd_conn,
+ MHD_CONNECTION_OPTION_TIMEOUT,
+ 1 /* 0 = no timeout, so this is MIN */);
+ server_reschedule (plugin,
+ s->server_recv->mhd_daemon,
+ GNUNET_YES);
+ }
+ notify_session_monitor (plugin,
+ s,
+ GNUNET_TRANSPORT_SS_DONE);
+ if (GNUNET_YES == s->known_to_service)
+ {
+ plugin->env->session_end (plugin->env->cls,
+ s->address,
+ s);
+ s->known_to_service = GNUNET_NO;
+ }
+ if (NULL != s->msg_tk)
+ {
+ GNUNET_MST_destroy (s->msg_tk);
+ s->msg_tk = NULL;
+ }
+ GNUNET_HELLO_address_free (s->address);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p destroyed\n",
+ s);
+ GNUNET_free (s);
}
/**
- * Function called for a quick conversion of the binary address to
+ * Disconnect session @a s by telling MHD to close the
+ * connections (reducing timeout, etc.).
+ *
+ * @param cls closure with the `struct HTTP_Server_Plugin`
+ * @param s the session
+ * @return #GNUNET_OK on success
+ */
+static int
+http_server_plugin_disconnect_session (void *cls,
+ struct GNUNET_ATS_Session *s)
+{
+ server_delete_session (s);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Session was idle, so disconnect it
+ *
+ * @param cls the session
+ */
+static void
+server_session_timeout (void *cls)
+{
+ struct GNUNET_ATS_Session *s = cls;
+ struct GNUNET_TIME_Relative left;
+
+ s->timeout_task = NULL;
+ left = GNUNET_TIME_absolute_get_remaining (s->timeout);
+ if (0 != left.rel_value_us)
+ {
+ /* not actually our turn yet, but let's at least update
+ the monitor, it may think we're about to die ... */
+ notify_session_monitor (s->plugin,
+ s,
+ GNUNET_TRANSPORT_SS_UP);
+ s->timeout_task = GNUNET_SCHEDULER_add_delayed (left,
+ &server_session_timeout,
+ s);
+ return;
+ }
+ GNUNET_log (TIMEOUT_LOG,
+ "Session %p was idle for %s, disconnecting\n",
+ s,
+ GNUNET_STRINGS_relative_time_to_string (HTTP_SERVER_SESSION_TIMEOUT,
+ GNUNET_YES));
+ server_delete_session (s);
+}
+
+
+/**
+ * Increment session timeout due to activity session @a s
+ *
+ * @param s the session
+ */
+static void
+server_reschedule_session_timeout (struct GNUNET_ATS_Session *s)
+{
+ GNUNET_assert (NULL != s->timeout_task);
+ s->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
+}
+
+
+/**
+ * Function that can be used by the transport service to transmit
+ * a message using the plugin. Note that in the case of a
+ * peer disconnecting, the continuation MUST be called
+ * prior to the disconnect notification itself. This function
+ * will be called with this peer's HELLO message to initiate
+ * a fresh connection to another peer.
+ *
+ * @param cls closure
+ * @param session which session must be used
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in @a msgbuf
+ * @param priority how important is the message (most plugins will
+ * ignore message priority and just FIFO)
+ * @param to how long to wait at most for the transmission (does not
+ * require plugins to discard the message after the timeout,
+ * just advisory for the desired delay; most plugins will ignore
+ * this as well)
+ * @param cont continuation to call once the message has
+ * been transmitted (or if the transport is ready
+ * for the next transmission call; or if the
+ * peer disconnected...); can be NULL
+ * @param cont_cls closure for @a cont
+ * @return number of bytes used (on the physical network, with overheads);
+ * -1 on hard errors (i.e. address invalid); 0 is a legal value
+ * and does NOT mean that the message was not transmitted (DV)
+ */
+static ssize_t
+http_server_plugin_send (void *cls,
+ struct GNUNET_ATS_Session *session,
+ const char *msgbuf,
+ size_t msgbuf_size,
+ unsigned int priority,
+ struct GNUNET_TIME_Relative to,
+ GNUNET_TRANSPORT_TransmitContinuation cont,
+ void *cont_cls)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct HTTP_Message *msg;
+ ssize_t bytes_sent = 0;
+ char *stat_txt;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p/request %p: Sending message with %u to peer `%s'\n",
+ session,
+ session->server_send,
+ msgbuf_size,
+ GNUNET_i2s (&session->target));
+
+ /* create new message and schedule */
+ bytes_sent = sizeof (struct HTTP_Message) + msgbuf_size;
+ msg = GNUNET_malloc (bytes_sent);
+ msg->next = NULL;
+ msg->size = msgbuf_size;
+ msg->pos = 0;
+ msg->buf = (char *) &msg[1];
+ msg->transmit_cont = cont;
+ msg->transmit_cont_cls = cont_cls;
+ GNUNET_memcpy (msg->buf,
+ msgbuf,
+ msgbuf_size);
+ GNUNET_CONTAINER_DLL_insert_tail (session->msg_head,
+ session->msg_tail,
+ msg);
+ session->msgs_in_queue++;
+ session->bytes_in_queue += msg->size;
+ notify_session_monitor (plugin,
+ session,
+ GNUNET_TRANSPORT_SS_UP);
+ GNUNET_asprintf (&stat_txt,
+ "# bytes currently in %s_server buffers",
+ plugin->protocol);
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ stat_txt, msgbuf_size, GNUNET_NO);
+ GNUNET_free (stat_txt);
+
+ if (NULL != session->server_send)
+ {
+ if (session->server_send->suspended)
+ {
+ MHD_resume_connection (session->server_send->mhd_conn);
+ session->server_send->suspended = false;
+ }
+ server_reschedule (session->plugin,
+ session->server_send->mhd_daemon,
+ GNUNET_YES);
+ }
+ return bytes_sent;
+}
+
+
+/**
+ * Terminate session during shutdown.
+ *
+ * @param cls the `struct HTTP_Server_Plugin *`
+ * @param peer for which this is a session
+ * @param value the `struct GNUNET_ATS_Session` to clean up
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+destroy_session_shutdown_cb (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ struct GNUNET_ATS_Session *s = value;
+ struct ServerRequest *sc_send;
+ struct ServerRequest *sc_recv;
+
+ sc_send = s->server_send;
+ sc_recv = s->server_recv;
+ server_delete_session (s);
+ if (NULL != sc_send)
+ sc_send->session = NULL;
+ if (NULL != sc_recv)
+ sc_recv->session = NULL;
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Terminate session.
+ *
+ * @param cls the `struct HTTP_Server_Plugin *`
+ * @param peer for which this is a session
+ * @param value the `struct GNUNET_ATS_Session` to clean up
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+destroy_session_cb (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ struct GNUNET_ATS_Session *s = value;
+
+ server_delete_session (s);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Function that can be used to force the plugin to disconnect
+ * from the given peer and cancel all previous transmissions
+ * (and their continuationc).
+ *
+ * @param cls closure
+ * @param target peer from which to disconnect
+ */
+static void
+http_server_plugin_disconnect_peer (void *cls,
+ const struct GNUNET_PeerIdentity *target)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Transport tells me to disconnect `%s'\n",
+ GNUNET_i2s (target));
+ GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
+ target,
+ &destroy_session_cb,
+ plugin);
+}
+
+
+/**
+ * Another peer has suggested an address for this
+ * peer and transport plugin. Check that this could be a valid
+ * address. If so, consider adding it to the list
+ * of addresses.
+ *
+ * @param cls closure
+ * @param addr pointer to the address
+ * @param addrlen length of @a addr
+ * @return #GNUNET_OK if this is a plausible address for this peer
+ * and transport
+ */
+static int
+http_server_plugin_address_suggested (void *cls,
+ const void *addr,
+ size_t addrlen)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct HttpAddressWrapper *next;
+ struct HttpAddressWrapper *pos;
+ const struct HttpAddress *haddr = addr;
+
+ if ((NULL != plugin->ext_addr) &&
+ GNUNET_YES == (http_common_cmp_addresses (addr, addrlen,
+ plugin->ext_addr->address,
+ plugin->ext_addr->address_length)))
+ {
+ /* Checking HTTP_OPTIONS_VERIFY_CERTIFICATE option for external hostname */
+ if ((ntohl (haddr->options) & HTTP_OPTIONS_VERIFY_CERTIFICATE) !=
+ (plugin->options & HTTP_OPTIONS_VERIFY_CERTIFICATE))
+ return GNUNET_NO; /* VERIFY option not set as required! */
+ return GNUNET_OK;
+ }
+ next = plugin->addr_head;
+ while (NULL != (pos = next))
+ {
+ next = pos->next;
+ if (GNUNET_YES == (http_common_cmp_addresses(addr,
+ addrlen,
+ pos->address,
+ pos->addrlen)))
+ return GNUNET_OK;
+ }
+ return GNUNET_NO;
+}
+
+
+/**
+ * Creates a new outbound session the transport
+ * service will use to send data to the peer.
+ *
+ * Since HTTP/S server cannot create sessions, always returns NULL.
+ *
+ * @param cls the plugin
+ * @param address the address
+ * @return always NULL
+ */
+static struct GNUNET_ATS_Session *
+http_server_plugin_get_session (void *cls,
+ const struct GNUNET_HELLO_Address *address)
+{
+ return NULL;
+}
+
+
+/**
+ * Call MHD IPv4 to process pending requests and then go back
+ * and schedule the next run.
+ *
+ * @param cls plugin as closure
+ */
+static void
+server_v4_run (void *cls)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ plugin->server_v4_task = NULL;
+ plugin->server_v4_immediately = GNUNET_NO;
+ GNUNET_assert (MHD_YES == MHD_run (plugin->server_v4));
+ server_reschedule (plugin, plugin->server_v4, GNUNET_NO);
+}
+
+
+/**
+ * Call MHD IPv6 to process pending requests and then go back
+ * and schedule the next run.
+ *
+ * @param cls plugin as closure
+ */
+static void
+server_v6_run (void *cls)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ plugin->server_v6_task = NULL;
+ plugin->server_v6_immediately = GNUNET_NO;
+ GNUNET_assert (MHD_YES == MHD_run (plugin->server_v6));
+ server_reschedule (plugin, plugin->server_v6, GNUNET_NO);
+}
+
+
+/**
+ * Function that queries MHD's select sets and
+ * starts the task waiting for them.
+ *
+ * @param plugin plugin
+ * @param daemon_handle the MHD daemon handle
+ * @param now schedule now
+ * @return gnunet task identifier
+ */
+static struct GNUNET_SCHEDULER_Task *
+server_schedule (struct HTTP_Server_Plugin *plugin,
+ struct MHD_Daemon *daemon_handle,
+ int now)
+{
+ struct GNUNET_SCHEDULER_Task * ret;
+ fd_set rs;
+ fd_set ws;
+ fd_set es;
+ struct GNUNET_NETWORK_FDSet *wrs;
+ struct GNUNET_NETWORK_FDSet *wws;
+ int max;
+ MHD_UNSIGNED_LONG_LONG timeout;
+ static unsigned long long last_timeout = 0;
+ int haveto;
+ struct GNUNET_TIME_Relative tv;
+
+ if (GNUNET_YES == plugin->in_shutdown)
+ return NULL;
+
+ ret = NULL;
+ FD_ZERO (&rs);
+ FD_ZERO (&ws);
+ FD_ZERO (&es);
+ wrs = GNUNET_NETWORK_fdset_create ();
+ wws = GNUNET_NETWORK_fdset_create ();
+ max = -1;
+ GNUNET_assert (MHD_YES ==
+ MHD_get_fdset (daemon_handle,
+ &rs,
+ &ws,
+ &es,
+ &max));
+ haveto = MHD_get_timeout (daemon_handle, &timeout);
+ if (haveto == MHD_YES)
+ {
+ if (timeout != last_timeout)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "SELECT Timeout changed from %llu to %llu (ms)\n",
+ last_timeout, timeout);
+ last_timeout = timeout;
+ }
+ if (timeout <= GNUNET_TIME_UNIT_SECONDS.rel_value_us / 1000LL)
+ tv.rel_value_us = (uint64_t) timeout * 1000LL;
+ else
+ tv = GNUNET_TIME_UNIT_SECONDS;
+ }
+ else
+ tv = GNUNET_TIME_UNIT_SECONDS;
+ /* Force immediate run, since we have outbound data to send */
+ if (now == GNUNET_YES)
+ tv = GNUNET_TIME_UNIT_MILLISECONDS;
+ GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
+ GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
+
+ if (daemon_handle == plugin->server_v4)
+ {
+ if (plugin->server_v4_task != NULL)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
+ plugin->server_v4_task = NULL;
+ }
+#if 0
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Scheduling IPv4 server task in %llu ms\n",
+ tv);
+#endif
+ ret =
+ GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ tv, wrs, wws,
+ &server_v4_run, plugin);
+ }
+ if (daemon_handle == plugin->server_v6)
+ {
+ if (plugin->server_v6_task != NULL)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
+ plugin->server_v6_task = NULL;
+ }
+#if 0
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Scheduling IPv6 server task in %llu ms\n", tv);
+#endif
+ ret =
+ GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ tv, wrs, wws,
+ &server_v6_run, plugin);
+ }
+ GNUNET_NETWORK_fdset_destroy (wrs);
+ GNUNET_NETWORK_fdset_destroy (wws);
+ return ret;
+}
+
+
+/**
+ * Reschedule the execution of both IPv4 and IPv6 server
+ *
+ * @param plugin the plugin
+ * @param server which server to schedule v4 or v6?
+ * @param now #GNUNET_YES to schedule execution immediately, #GNUNET_NO to wait
+ * until timeout
+ */
+static void
+server_reschedule (struct HTTP_Server_Plugin *plugin,
+ struct MHD_Daemon *server,
+ int now)
+{
+ if ((server == plugin->server_v4) && (plugin->server_v4 != NULL))
+ {
+ if (GNUNET_YES == plugin->server_v4_immediately)
+ return; /* No rescheduling, server will run asap */
+
+ if (GNUNET_YES == now)
+ plugin->server_v4_immediately = GNUNET_YES;
+
+ if (plugin->server_v4_task != NULL)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
+ plugin->server_v4_task = NULL;
+ }
+ plugin->server_v4_task = server_schedule (plugin, plugin->server_v4, now);
+ }
+
+ if ((server == plugin->server_v6) && (plugin->server_v6 != NULL))
+ {
+ if (GNUNET_YES == plugin->server_v6_immediately)
+ return; /* No rescheduling, server will run asap */
+
+ if (GNUNET_YES == now)
+ plugin->server_v6_immediately = GNUNET_YES;
+
+ if (plugin->server_v6_task != NULL)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
+ plugin->server_v6_task = NULL;
+ }
+ plugin->server_v6_task = server_schedule (plugin, plugin->server_v6, now);
+ }
+}
+
+
+/**
+ * Function that is called to get the keepalive factor.
+ * GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT is divided by this number to
+ * calculate the interval between keepalive packets.
+ *
+ * @param cls closure with the `struct HTTP_Server_Plugin`
+ * @return keepalive factor
+ */
+static unsigned int
+http_server_query_keepalive_factor (void *cls)
+{
+ return 3;
+}
+
+
+/**
+ * Function that will be called whenever the transport service wants to
+ * notify the plugin that a session is still active and in use and
+ * therefore the session timeout for this session has to be updated
+ *
+ * @param cls closure
+ * @param peer which peer was the session for
+ * @param session which session is being updated
+ */
+static void
+http_server_plugin_update_session_timeout (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_ATS_Session *session)
+{
+ server_reschedule_session_timeout (session);
+}
+
+
+/**
+ * Tell MHD that the connection should timeout after @a to seconds.
+ *
+ * @param plugin our plugin
+ * @param s session for which the timeout changes
+ * @param to timeout in seconds
+ */
+static void
+server_mhd_connection_timeout (struct HTTP_Server_Plugin *plugin,
+ struct GNUNET_ATS_Session *s,
+ unsigned int to)
+{
+ /* Setting timeouts for other connections */
+ if (NULL != s->server_recv)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Setting timeout for %p to %u sec.\n",
+ s->server_recv, to);
+ MHD_set_connection_option (s->server_recv->mhd_conn,
+ MHD_CONNECTION_OPTION_TIMEOUT,
+ to);
+ server_reschedule (plugin, s->server_recv->mhd_daemon, GNUNET_NO);
+ }
+ if (NULL != s->server_send)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Setting timeout for %p to %u sec.\n",
+ s->server_send, to);
+ MHD_set_connection_option (s->server_send->mhd_conn,
+ MHD_CONNECTION_OPTION_TIMEOUT,
+ to);
+ server_reschedule (plugin, s->server_send->mhd_daemon, GNUNET_NO);
+ }
+}
+
+
+/**
+ * Parse incoming URL for tag and target
+ *
+ * @param plugin plugin
+ * @param url incoming url
+ * @param target where to store the target
+ * @param tag where to store the tag
+ * @param options where to store the options
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+static int
+server_parse_url (struct HTTP_Server_Plugin *plugin,
+ const char *url,
+ struct GNUNET_PeerIdentity *target,
+ uint32_t *tag,
+ uint32_t *options)
+{
+ regmatch_t matches[4];
+ const char *tag_start;
+ const char *target_start;
+ char *tag_end;
+ char *options_end;
+ size_t hash_length;
+ unsigned long int rc;
+
+ /* URL parsing */
+#define URL_REGEX \
+ ("^.*/([0-9A-Z]+);([0-9]+)(,[0-9]+)?$")
+
+ if (NULL == url)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ if (regexec(&plugin->url_regex, url, 4, matches, 0))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL `%s' did not match regex\n", url);
+ return GNUNET_SYSERR;
+ }
+
+ target_start = &url[matches[1].rm_so];
+ tag_start = &url[matches[2].rm_so];
+
+ /* convert tag */
+ rc = strtoul (tag_start, &tag_end, 10);
+ if (&url[matches[2].rm_eo] != tag_end)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL tag did not line up with submatch\n");
+ return GNUNET_SYSERR;
+ }
+ if (rc == 0)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL tag is zero\n");
+ return GNUNET_SYSERR;
+ }
+ if ((rc == ULONG_MAX) && (ERANGE == errno))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL tag > ULONG_MAX\n");
+ return GNUNET_SYSERR;
+ }
+ if (rc > UINT32_MAX)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL tag > UINT32_MAX\n");
+ return GNUNET_SYSERR;
+ }
+ (*tag) = (uint32_t)rc;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found tag `%u' in url\n",
+ *tag);
+
+ /* convert peer id */
+ hash_length = matches[1].rm_eo - matches[1].rm_so;
+ if (hash_length != plugin->peer_id_length)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL target is %u bytes, expecting %u\n",
+ hash_length, plugin->peer_id_length);
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_eddsa_public_key_from_string (target_start,
+ hash_length,
+ &target->public_key))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL target conversion failed\n");
+ return GNUNET_SYSERR;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found target `%s' in URL\n",
+ GNUNET_i2s_full (target));
+
+ /* convert options */
+ if (-1 == matches[3].rm_so)
+ {
+ *options = 0;
+ }
+ else
+ {
+ rc = strtoul (&url[matches[3].rm_so + 1], &options_end, 10);
+ if (&url[matches[3].rm_eo] != options_end)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL options did not line up with submatch\n");
+ return GNUNET_SYSERR;
+ }
+ if ((rc == ULONG_MAX) && (ERANGE == errno))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL options > ULONG_MAX\n");
+ return GNUNET_SYSERR;
+ }
+ if (rc > UINT32_MAX)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "URL options > UINT32_MAX\n");
+ return GNUNET_SYSERR;
+ }
+ (*options) = (uint32_t) rc;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found options `%u' in url\n",
+ *options);
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Closure for #session_tag_it().
+ */
+struct GNUNET_ATS_SessionTagContext
+{
+ /**
+ * Set to session matching the tag.
+ */
+ struct GNUNET_ATS_Session *res;
+
+ /**
+ * Tag we are looking for.
+ */
+ uint32_t tag;
+};
+
+
+/**
+ * Find a session with a matching tag.
+ *
+ * @param cls the `struct GNUNET_ATS_SessionTagContext *`
+ * @param key peer identity (unused)
+ * @param value the `struct GNUNET_ATS_Session *`
+ * @return #GNUNET_NO if we found the session, #GNUNET_OK if not
+ */
+static int
+session_tag_it (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
+{
+ struct GNUNET_ATS_SessionTagContext *stc = cls;
+ struct GNUNET_ATS_Session *s = value;
+
+ if (s->tag == stc->tag)
+ {
+ stc->res = s;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+
+/**
+ * Lookup a mhd connection and create one if none is found
+ *
+ * @param plugin the plugin handle
+ * @param mhd_connection the incoming mhd_connection
+ * @param url incoming requested URL
+ * @param method PUT or GET
+ * @return the server connecetion
+ */
+static struct ServerRequest *
+server_lookup_connection (struct HTTP_Server_Plugin *plugin,
+ struct MHD_Connection *mhd_connection,
+ const char *url,
+ const char *method)
+{
+ struct GNUNET_ATS_Session *s = NULL;
+ struct ServerRequest *sc = NULL;
+ const union MHD_ConnectionInfo *conn_info;
+ struct HttpAddress *addr;
+ struct GNUNET_PeerIdentity target;
+ size_t addr_len;
+ struct GNUNET_ATS_SessionTagContext stc;
+ uint32_t options;
+ int direction = GNUNET_SYSERR;
+ unsigned int to;
+ enum GNUNET_ATS_Network_Type scope;
+
+ conn_info = MHD_get_connection_info (mhd_connection,
+ MHD_CONNECTION_INFO_CLIENT_ADDRESS);
+ if ((conn_info->client_addr->sa_family != AF_INET) &&
+ (conn_info->client_addr->sa_family != AF_INET6))
+ return NULL;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New %s request from %s\n",
+ method,
+ url);
+ stc.tag = 0;
+ options = 0; /* make gcc happy */
+ if (GNUNET_SYSERR ==
+ server_parse_url (plugin, url, &target, &stc.tag, &options))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Invalid url %s\n", url);
+ return NULL;
+ }
+ if (0 == strcmp (MHD_HTTP_METHOD_PUT, method))
+ direction = _RECEIVE;
+ else if (0 == strcmp (MHD_HTTP_METHOD_GET, method))
+ direction = _SEND;
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Invalid method %s for request from %s\n",
+ method, url);
+ return NULL;
+ }
+
+ plugin->cur_request++;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New %s request from %s with tag %u (%u of %u)\n",
+ method,
+ GNUNET_i2s (&target),
+ stc.tag,
+ plugin->cur_request, plugin->max_request);
+ /* find existing session */
+ stc.res = NULL;
+ GNUNET_CONTAINER_multipeermap_get_multiple (plugin->sessions,
+ &target,
+ &session_tag_it,
+ &stc);
+ if (NULL == (s = stc.res))
+ {
+ /* create new session */
+ addr = NULL;
+ switch (conn_info->client_addr->sa_family)
+ {
+ case (AF_INET):
+ addr = http_common_address_from_socket (plugin->protocol,
+ conn_info->client_addr,
+ sizeof (struct sockaddr_in));
+ addr_len = http_common_address_get_size (addr);
+ scope = plugin->env->get_address_type (plugin->env->cls,
+ conn_info->client_addr,
+ sizeof (struct sockaddr_in));
+ break;
+ case (AF_INET6):
+ addr = http_common_address_from_socket (plugin->protocol,
+ conn_info->client_addr,
+ sizeof (struct sockaddr_in6));
+ addr_len = http_common_address_get_size (addr);
+ scope = plugin->env->get_address_type (plugin->env->cls,
+ conn_info->client_addr,
+ sizeof (struct sockaddr_in6));
+ break;
+ default:
+ /* external host name */
+ return NULL;
+ }
+ s = GNUNET_new (struct GNUNET_ATS_Session);
+ s->target = target;
+ s->plugin = plugin;
+ s->scope = scope;
+ s->address = GNUNET_HELLO_address_allocate (&s->target,
+ PLUGIN_NAME,
+ addr,
+ addr_len,
+ GNUNET_HELLO_ADDRESS_INFO_INBOUND);
+ s->next_receive = GNUNET_TIME_UNIT_ZERO_ABS;
+ s->tag = stc.tag;
+ s->timeout = GNUNET_TIME_relative_to_absolute (HTTP_SERVER_SESSION_TIMEOUT);
+ s->timeout_task = GNUNET_SCHEDULER_add_delayed (HTTP_SERVER_SESSION_TIMEOUT,
+ &server_session_timeout,
+ s);
+ (void) GNUNET_CONTAINER_multipeermap_put (plugin->sessions,
+ &s->target,
+ s,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ notify_session_monitor (plugin,
+ s,
+ GNUNET_TRANSPORT_SS_INIT);
+ notify_session_monitor (plugin,
+ s,
+ GNUNET_TRANSPORT_SS_HANDSHAKE);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating new session %p for peer `%s' connecting from `%s'\n",
+ s, GNUNET_i2s (&target),
+ http_common_plugin_address_to_string (plugin->protocol,
+ addr,
+ addr_len));
+ GNUNET_free_non_null (addr);
+ }
+
+ if ( (_RECEIVE == direction) &&
+ (NULL != s->server_recv) )
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Duplicate PUT request from `%s' tag %u, dismissing new request\n",
+ GNUNET_i2s (&target),
+ stc.tag);
+ return NULL;
+ }
+ if ((_SEND == direction) && (NULL != s->server_send))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Duplicate GET request from `%s' tag %u, dismissing new request\n",
+ GNUNET_i2s (&target),
+ stc.tag);
+ return NULL;
+ }
+ sc = GNUNET_new (struct ServerRequest);
+ if (conn_info->client_addr->sa_family == AF_INET)
+ sc->mhd_daemon = plugin->server_v4;
+ if (conn_info->client_addr->sa_family == AF_INET6)
+ sc->mhd_daemon = plugin->server_v6;
+ sc->mhd_conn = mhd_connection;
+ sc->direction = direction;
+ sc->connected = GNUNET_NO;
+ sc->session = s;
+ sc->options = options;
+ if (direction == _SEND)
+ {
+ s->server_send = sc;
+ }
+ if (direction == _RECEIVE)
+ {
+ s->server_recv = sc;
+ }
+
+ if ((GNUNET_NO == s->known_to_service) &&
+ (NULL != s->server_send) &&
+ (NULL != s->server_recv) )
+ {
+ s->known_to_service = GNUNET_YES;
+ notify_session_monitor (plugin,
+ s,
+ GNUNET_TRANSPORT_SS_UP);
+ plugin->env->session_start (plugin->env->cls,
+ s->address,
+ s,
+ s->scope);
+ }
+
+ to = (HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL);
+ server_mhd_connection_timeout (plugin, s, to);
+ return sc;
+}
+
+
+/**
+ * Callback called by MHD when it needs data to send
+ *
+ * @param cls current session
+ * @param pos position in buffer
+ * @param buf the buffer to write data to
+ * @param max max number of bytes available in @a buf
+ * @return bytes written to @a buf
+ */
+static ssize_t
+server_send_callback (void *cls,
+ uint64_t pos,
+ char *buf,
+ size_t max)
+{
+ struct ServerRequest *sc = cls;
+ struct GNUNET_ATS_Session *s = sc->session;
+ ssize_t bytes_read = 0;
+ struct HTTP_Message *msg;
+ char *stat_txt;
+
+ if (NULL == s)
+ {
+ /* session is disconnecting */
+ return 0;
+ }
+
+ sc = s->server_send;
+ if (NULL == sc)
+ return 0;
+ msg = s->msg_head;
+ if (NULL != msg)
+ {
+ /* sending */
+ bytes_read = GNUNET_MIN (msg->size - msg->pos,
+ max);
+ GNUNET_memcpy (buf, &msg->buf[msg->pos], bytes_read);
+ msg->pos += bytes_read;
+
+ /* removing message */
+ if (msg->pos == msg->size)
+ {
+ GNUNET_CONTAINER_DLL_remove (s->msg_head,
+ s->msg_tail,
+ msg);
+ if (NULL != msg->transmit_cont)
+ msg->transmit_cont (msg->transmit_cont_cls, &s->target, GNUNET_OK,
+ msg->size, msg->size + msg->overhead);
+ GNUNET_assert (s->msgs_in_queue > 0);
+ s->msgs_in_queue--;
+ GNUNET_assert (s->bytes_in_queue >= msg->size);
+ s->bytes_in_queue -= msg->size;
+ GNUNET_free (msg);
+ notify_session_monitor (s->plugin,
+ s,
+ GNUNET_TRANSPORT_SS_UPDATE);
+ }
+ }
+ if (0 < bytes_read)
+ {
+ sc->connected = GNUNET_YES;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sent %u bytes to peer `%s' with session %p \n",
+ bytes_read,
+ GNUNET_i2s (&s->target),
+ s);
+ GNUNET_asprintf (&stat_txt,
+ "# bytes currently in %s_server buffers",
+ s->plugin->protocol);
+ GNUNET_STATISTICS_update (s->plugin->env->stats,
+ stat_txt,
+ - bytes_read,
+ GNUNET_NO);
+ GNUNET_free (stat_txt);
+ GNUNET_asprintf (&stat_txt,
+ "# bytes transmitted via %s_server",
+ s->plugin->protocol);
+ GNUNET_STATISTICS_update (s->plugin->env->stats,
+ stat_txt, bytes_read, GNUNET_NO);
+ GNUNET_free (stat_txt);
+ }
+ else if ((sc->options & OPTION_LONG_POLL) && sc->connected)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Completing GET response to peer `%s' with session %p\n",
+ GNUNET_i2s (&s->target),
+ s);
+ return MHD_CONTENT_READER_END_OF_STREAM;
+ }
+ else
+ {
+ MHD_suspend_connection (s->server_send->mhd_conn);
+ s->server_send->suspended = true;
+ return 0;
+ }
+ return bytes_read;
+}
+
+
+/**
+ * Callback called by MessageStreamTokenizer when a message has arrived
+ *
+ * @param cls current session as closure
+ * @param message the message to be forwarded to transport service
+ * @return #GNUNET_OK (all OK)
+ */
+static int
+server_receive_mst_cb (void *cls,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_ATS_Session *s = cls;
+ struct HTTP_Server_Plugin *plugin = s->plugin;
+ struct GNUNET_TIME_Relative delay;
+ char *stat_txt;
+
+ if (GNUNET_NO == s->known_to_service)
+ {
+ s->known_to_service = GNUNET_YES;
+ plugin->env->session_start (plugin->env->cls,
+ s->address,
+ s,
+ s->scope);
+ notify_session_monitor (plugin,
+ s,
+ GNUNET_TRANSPORT_SS_UP);
+ }
+ delay = plugin->env->receive (plugin->env->cls,
+ s->address,
+ s,
+ message);
+ GNUNET_asprintf (&stat_txt,
+ "# bytes received via %s_server",
+ plugin->protocol);
+ GNUNET_STATISTICS_update (plugin->env->stats,
+ stat_txt,
+ ntohs (message->size),
+ GNUNET_NO);
+ GNUNET_free (stat_txt);
+ s->next_receive = GNUNET_TIME_relative_to_absolute (delay);
+ if (delay.rel_value_us > 0)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Peer `%s' address `%s' next read delayed for %s\n",
+ GNUNET_i2s (&s->target),
+ http_common_plugin_address_to_string (plugin->protocol,
+ s->address->address,
+ s->address->address_length),
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_YES));
+ }
+ server_reschedule_session_timeout (s);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Add headers to a request indicating that we allow Cross-Origin Resource
+ * Sharing.
+ *
+ * @param response response object to modify
+ */
+static void
+add_cors_headers(struct MHD_Response *response)
+{
+ MHD_add_response_header (response,
+ "Access-Control-Allow-Origin",
+ "*");
+ MHD_add_response_header (response,
+ "Access-Control-Allow-Methods",
+ "GET, PUT, OPTIONS");
+ MHD_add_response_header (response,
+ "Access-Control-Max-Age",
+ "86400");
+}
+
+
+/**
+ * MHD callback for a new incoming connection
+ *
+ * @param cls the plugin handle
+ * @param mhd_connection the mhd connection
+ * @param url the requested URL
+ * @param method GET or PUT
+ * @param version HTTP version
+ * @param upload_data upload data
+ * @param upload_data_size size of @a upload_data
+ * @param httpSessionCache the session cache to remember the connection
+ * @return MHD_YES if connection is accepted, MHD_NO on reject
+ */
+static int
+server_access_cb (void *cls,
+ struct MHD_Connection *mhd_connection,
+ const char *url,
+ const char *method,
+ const char *version,
+ const char *upload_data,
+ size_t *upload_data_size,
+ void **httpSessionCache)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct ServerRequest *sc = *httpSessionCache;
+ struct GNUNET_ATS_Session *s;
+ struct MHD_Response *response;
+ int res = MHD_YES;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("Access from connection %p (%u of %u) for `%s' `%s' url `%s' with upload data size %u\n"),
+ sc,
+ plugin->cur_request,
+ plugin->max_request,
+ method,
+ version,
+ url,
+ (*upload_data_size));
+ if (NULL == sc)
+ {
+ /* CORS pre-flight request */
+ if (0 == strcmp (MHD_HTTP_METHOD_OPTIONS, method))
+ {
+ response = MHD_create_response_from_buffer (0, NULL,
+ MHD_RESPMEM_PERSISTENT);
+ add_cors_headers(response);
+ res = MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
+ MHD_destroy_response (response);
+ return res;
+ }
+ /* new connection */
+ sc = server_lookup_connection (plugin, mhd_connection, url, method);
+ if (NULL != sc)
+ {
+ /* attach to new / existing session */
+ (*httpSessionCache) = sc;
+ }
+ else
+ {
+ /* existing session already has matching connection, refuse */
+ response = MHD_create_response_from_buffer (strlen (HTTP_ERROR_RESPONSE),
+ HTTP_ERROR_RESPONSE,
+ MHD_RESPMEM_PERSISTENT);
+ MHD_add_response_header (response,
+ MHD_HTTP_HEADER_CONTENT_TYPE,
+ "text/html");
+ add_cors_headers(response);
+ res = MHD_queue_response (mhd_connection, MHD_HTTP_NOT_FOUND, response);
+ MHD_destroy_response (response);
+ return res;
+ }
+ }
+ /* 'old' connection */
+ if (NULL == (s = sc->session))
+ {
+ /* Session was already disconnected;
+ sent HTTP/1.1: 200 OK as response */
+ response = MHD_create_response_from_buffer (strlen ("Thank you!"),
+ "Thank you!",
+ MHD_RESPMEM_PERSISTENT);
+ add_cors_headers(response);
+ MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
+ MHD_destroy_response (response);
+ return MHD_YES;
+ }
+
+ if (sc->direction == _SEND)
+ {
+ response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN, 32 * 1024,
+ &server_send_callback, sc, NULL);
+ add_cors_headers(response);
+ MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
+ MHD_destroy_response (response);
+ return MHD_YES;
+ }
+ if (sc->direction == _RECEIVE)
+ {
+ if ((*upload_data_size == 0) && (sc->connected == GNUNET_NO))
+ {
+ /* (*upload_data_size == 0) first callback when header are passed */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p / Connection %p: Peer `%s' PUT on address `%s' connected\n",
+ s, sc,
+ GNUNET_i2s (&s->target),
+ http_common_plugin_address_to_string (plugin->protocol,
+ s->address->address,
+ s->address->address_length));
+ sc->connected = GNUNET_YES;
+ return MHD_YES;
+ }
+ else if ((*upload_data_size == 0) && (sc->connected == GNUNET_YES))
+ {
+ /* (*upload_data_size == 0) when upload is complete */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p / Connection %p: Peer `%s' PUT on address `%s' finished upload\n",
+ s, sc,
+ GNUNET_i2s (&s->target),
+ http_common_plugin_address_to_string (plugin->protocol,
+ s->address->address,
+ s->address->address_length));
+ sc->connected = GNUNET_NO;
+ /* Sent HTTP/1.1: 200 OK as PUT Response\ */
+ response = MHD_create_response_from_buffer (strlen ("Thank you!"),
+ "Thank you!",
+ MHD_RESPMEM_PERSISTENT);
+ add_cors_headers(response);
+ MHD_queue_response (mhd_connection, MHD_HTTP_OK, response);
+ MHD_destroy_response (response);
+ return MHD_YES;
+ }
+ else if ((*upload_data_size > 0) && (sc->connected == GNUNET_YES))
+ {
+ struct GNUNET_TIME_Relative delay;
+
+ /* (*upload_data_size > 0) for every segment received */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p / Connection %p: Peer `%s' PUT on address `%s' received %u bytes\n",
+ s, sc,
+ GNUNET_i2s (&s->target),
+ http_common_plugin_address_to_string (plugin->protocol,
+ s->address->address,
+ s->address->address_length),
+ *upload_data_size);
+ delay = GNUNET_TIME_absolute_get_remaining (s->next_receive);
+ if (0 == delay.rel_value_us)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "PUT with %u bytes forwarded to MST\n",
+ *upload_data_size);
+ if (s->msg_tk == NULL)
+ {
+ s->msg_tk = GNUNET_MST_create (&server_receive_mst_cb,
+ s);
+ }
+ GNUNET_MST_from_buffer (s->msg_tk,
+ upload_data,
+ *upload_data_size,
+ GNUNET_NO, GNUNET_NO);
+ server_mhd_connection_timeout (plugin, s,
+ GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value_us / 1000LL
+ / 1000LL);
+ (*upload_data_size) = 0;
+ }
+ else
+ {
+ /* delay processing */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Session %p / Connection %p: no inbound bandwidth available! Next read was delayed by %s\n",
+ s,
+ sc,
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_YES));
+ GNUNET_assert(s->server_recv->mhd_conn == mhd_connection);
+ MHD_suspend_connection (s->server_recv->mhd_conn);
+ s->server_recv->suspended = true;
+ if (NULL == s->recv_wakeup_task)
+ s->recv_wakeup_task
+ = GNUNET_SCHEDULER_add_delayed (delay,
+ &server_wake_up,
+ s);
+ }
+ return MHD_YES;
+ }
+ else
+ {
+ GNUNET_break (0);
+ return MHD_NO;
+ }
+ }
+ return res;
+}
+
+
+/**
+ * Callback from MHD when a connection disconnects
+ *
+ * @param cls closure with the `struct HTTP_Server_Plugin *`
+ * @param connection the disconnected MHD connection
+ * @param httpSessionCache the pointer to distinguish
+ */
+static void
+server_disconnect_cb (void *cls,
+ struct MHD_Connection *connection,
+ void **httpSessionCache)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct ServerRequest *sc = *httpSessionCache;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnect for connection %p\n",
+ sc);
+ if (NULL == sc)
+ {
+ /* CORS pre-flight request finished */
+ return;
+ }
+
+ if (NULL != sc->session)
+ {
+ if (sc->direction == _SEND)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Peer `%s' connection %p, GET on address `%s' disconnected\n",
+ GNUNET_i2s (&sc->session->target),
+ sc->session->server_send,
+ http_common_plugin_address_to_string (plugin->protocol,
+ sc->session->address->address,
+ sc->session->address->address_length));
+
+ sc->session->server_send = NULL;
+ }
+ else if (sc->direction == _RECEIVE)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Peer `%s' connection %p PUT on address `%s' disconnected\n",
+ GNUNET_i2s (&sc->session->target),
+ sc->session->server_recv,
+ http_common_plugin_address_to_string (plugin->protocol,
+ sc->session->address->address,
+ sc->session->address->address_length));
+ sc->session->server_recv = NULL;
+ if (NULL != sc->session->msg_tk)
+ {
+ GNUNET_MST_destroy (sc->session->msg_tk);
+ sc->session->msg_tk = NULL;
+ }
+ }
+ }
+ GNUNET_free (sc);
+ plugin->cur_request--;
+}
+
+
+/**
+ * Callback from MHD when a connection starts/stops
+ *
+ * @param cls closure with the `struct HTTP_Server_Plugin *`
+ * @param connection connection handle
+ * @param socket_context socket-specific pointer
+ * @param toe reason for connection notification
+ * @see #MHD_OPTION_NOTIFY_CONNECTION
+ */
+static void
+server_connection_cb (void *cls,
+ struct MHD_Connection *connection,
+ void **socket_context,
+ enum MHD_ConnectionNotificationCode toe)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ const union MHD_ConnectionInfo *info;
+
+ if (MHD_CONNECTION_NOTIFY_STARTED == toe)
+ return;
+
+ /* Reschedule to remove closed socket from our select set */
+ info = MHD_get_connection_info (connection,
+ MHD_CONNECTION_INFO_DAEMON);
+ GNUNET_assert (NULL != info);
+ server_reschedule (plugin,
+ info->daemon,
+ GNUNET_YES);
+}
+
+
+/**
+ * Check if incoming connection is accepted.
+ *
+ * @param cls plugin as closure
+ * @param addr address of incoming connection
+ * @param addr_len number of bytes in @a addr
+ * @return MHD_YES if connection is accepted, MHD_NO if connection is rejected
+ */
+static int
+server_accept_cb (void *cls,
+ const struct sockaddr *addr,
+ socklen_t addr_len)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ if (plugin->cur_request <= plugin->max_request)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("Accepting connection (%u of %u) from `%s'\n"),
+ plugin->cur_request, plugin->max_request,
+ GNUNET_a2s (addr, addr_len));
+ return MHD_YES;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Server reached maximum number connections (%u), rejecting new connection\n"),
+ plugin->max_request);
+ return MHD_NO;
+ }
+}
+
+
+/**
+ * Log function called by MHD.
+ *
+ * @param arg NULL
+ * @param fmt format string
+ * @param ap arguments for the format string (va_start() and va_end()
+ * will be called by MHD)
+ */
+static void
+server_log (void *arg,
+ const char *fmt,
+ va_list ap)
+{
+ char text[1024];
+
+ vsnprintf (text,
+ sizeof (text),
+ fmt,
+ ap);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Server: %s\n",
+ text);
+}
+
+
+#if BUILD_HTTPS
+/**
+ * Load ssl certificate from file
+ *
+ * @param file filename
+ * @return content of the file
+ */
+static char *
+server_load_file (const char *file)
+{
+ struct GNUNET_DISK_FileHandle *gn_file;
+ uint64_t fsize;
+ char *text = NULL;
+
+ if (GNUNET_OK != GNUNET_DISK_file_size (file,
+ &fsize, GNUNET_NO, GNUNET_YES))
+ return NULL;
+ text = GNUNET_malloc (fsize + 1);
+ gn_file =
+ GNUNET_DISK_file_open (file, GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_USER_READ);
+ if (NULL == gn_file)
+ {
+ GNUNET_free (text);
+ return NULL;
+ }
+ if (GNUNET_SYSERR == GNUNET_DISK_file_read (gn_file, text, fsize))
+ {
+ GNUNET_free (text);
+ GNUNET_DISK_file_close (gn_file);
+ return NULL;
+ }
+ text[fsize] = '\0';
+ GNUNET_DISK_file_close (gn_file);
+ return text;
+}
+#endif
+
+
+#if BUILD_HTTPS
+/**
+ * Load ssl certificate
+ *
+ * @param plugin the plugin
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ */
+static int
+server_load_certificate (struct HTTP_Server_Plugin *plugin)
+{
+ int res = GNUNET_OK;
+ char *key_file;
+ char *cert_file;
+
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (plugin->env->cfg,
+ plugin->name,
+ "KEY_FILE", &key_file))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ plugin->name, "CERT_FILE");
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (plugin->env->cfg,
+ plugin->name,
+ "CERT_FILE", &cert_file))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ plugin->name, "CERT_FILE");
+ GNUNET_free (key_file);
+ return GNUNET_SYSERR;
+ }
+ /* Get crypto init string from config. If not present, use
+ * default values */
+ if (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
+ plugin->name,
+ "CRYPTO_INIT",
+ &plugin->crypto_init))
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Using crypto init string `%s'\n",
+ plugin->crypto_init);
+ else
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Using default crypto init string \n");
+
+ /* read key & certificates from file */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Trying to loading TLS certificate from key-file `%s' cert-file`%s'\n",
+ key_file, cert_file);
+
+ plugin->key = server_load_file (key_file);
+ plugin->cert = server_load_file (cert_file);
+
+ if ((plugin->key == NULL) || (plugin->cert == NULL))
+ {
+ struct GNUNET_OS_Process *cert_creation;
+
+ GNUNET_free_non_null (plugin->key);
+ plugin->key = NULL;
+ GNUNET_free_non_null (plugin->cert);
+ plugin->cert = NULL;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "No usable TLS certificate found, creating certificate\n");
+ errno = 0;
+ cert_creation =
+ GNUNET_OS_start_process (GNUNET_NO, GNUNET_OS_INHERIT_STD_OUT_AND_ERR,
+ NULL, NULL, NULL,
+ "gnunet-transport-certificate-creation",
+ "gnunet-transport-certificate-creation",
+ key_file,
+ cert_file,
+ NULL);
+ if (NULL == cert_creation)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Could not create a new TLS certificate, program `gnunet-transport-certificate-creation' could not be started!\n"));
+ GNUNET_free (key_file);
+ GNUNET_free (cert_file);
+
+ GNUNET_free_non_null (plugin->key);
+ plugin->key = NULL;
+ GNUNET_free_non_null (plugin->cert);
+ plugin->cert = NULL;
+ GNUNET_free_non_null (plugin->crypto_init);
+ plugin->crypto_init = NULL;
+
+ return GNUNET_SYSERR;
+ }
+ GNUNET_assert (GNUNET_OK == GNUNET_OS_process_wait (cert_creation));
+ GNUNET_OS_process_destroy (cert_creation);
+
+ plugin->key = server_load_file (key_file);
+ plugin->cert = server_load_file (cert_file);
+ }
+
+ if ((plugin->key == NULL) || (plugin->cert == NULL))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("No usable TLS certificate found and creating one at `%s/%s' failed!\n"),
+ key_file, cert_file);
+ GNUNET_free (key_file);
+ GNUNET_free (cert_file);
+
+ GNUNET_free_non_null (plugin->key);
+ plugin->key = NULL;
+ GNUNET_free_non_null (plugin->cert);
+ plugin->cert = NULL;
+ GNUNET_free_non_null (plugin->crypto_init);
+ plugin->crypto_init = NULL;
+
+ return GNUNET_SYSERR;
+ }
+ GNUNET_free (key_file);
+ GNUNET_free (cert_file);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "TLS certificate loaded\n");
+ return res;
+}
+#endif
+
+
+/**
+ * Invoke `MHD_start_daemon` with the various options we need to
+ * setup the HTTP server with the given listen address.
+ *
+ * @param plugin our plugin
+ * @param addr listen address to use
+ * @param v6 MHD_NO_FLAG or MHD_USE_IPv6, depending on context
+ * @return NULL on error
+ */
+static struct MHD_Daemon *
+run_mhd_start_daemon (struct HTTP_Server_Plugin *plugin,
+ const struct sockaddr_in *addr,
+ int v6)
+{
+ struct MHD_Daemon *server;
+ unsigned int timeout;
+
+#if MHD_VERSION >= 0x00090E00
+ timeout = HTTP_SERVER_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL / 1000LL;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "MHD can set timeout per connection! Default time out %u sec.\n",
+ timeout);
+#else
+ timeout = HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL;
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "MHD cannot set timeout per connection! Default time out %u sec.\n",
+ timeout);
+#endif
+ server = MHD_start_daemon (
+#if VERBOSE_SERVER
+ MHD_USE_DEBUG |
+#endif
+#if BUILD_HTTPS
+ MHD_USE_SSL |
+#endif
+ MHD_USE_SUSPEND_RESUME |
+ v6,
+ plugin->port,
+ &server_accept_cb, plugin,
+ &server_access_cb, plugin,
+ MHD_OPTION_SOCK_ADDR,
+ addr,
+ MHD_OPTION_CONNECTION_LIMIT,
+ (unsigned int) plugin->max_request,
+#if BUILD_HTTPS
+ MHD_OPTION_HTTPS_PRIORITIES,
+ plugin->crypto_init,
+ MHD_OPTION_HTTPS_MEM_KEY,
+ plugin->key,
+ MHD_OPTION_HTTPS_MEM_CERT,
+ plugin->cert,
+#endif
+ MHD_OPTION_CONNECTION_TIMEOUT,
+ timeout,
+ MHD_OPTION_CONNECTION_MEMORY_LIMIT,
+ (size_t) (2 *
+ GNUNET_MAX_MESSAGE_SIZE),
+ MHD_OPTION_NOTIFY_COMPLETED,
+ &server_disconnect_cb, plugin,
+ MHD_OPTION_NOTIFY_CONNECTION,
+ &server_connection_cb, plugin,
+ MHD_OPTION_EXTERNAL_LOGGER,
+ &server_log, NULL,
+ MHD_OPTION_END);
+#ifdef TCP_STEALTH
+ if ( (NULL != server) &&
+ (0 != (plugin->options & HTTP_OPTIONS_TCP_STEALTH)) )
+ {
+ const union MHD_DaemonInfo *di;
+
+ di = MHD_get_daemon_info (server,
+ MHD_DAEMON_INFO_LISTEN_FD,
+ NULL);
+ if ( (0 != setsockopt ((int) di->listen_fd,
+ IPPROTO_TCP,
+ TCP_STEALTH,
+ plugin->env->my_identity,
+ sizeof (struct GNUNET_PeerIdentity))) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("TCP_STEALTH not supported on this platform.\n"));
+ MHD_stop_daemon (server);
+ server = NULL;
+ }
+ }
+#endif
+ return server;
+}
+
+
+/**
+ * Start the HTTP server
+ *
+ * @param plugin the plugin handle
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ */
+static int
+server_start (struct HTTP_Server_Plugin *plugin)
+{
+ const char *msg;
+
+ GNUNET_assert (NULL != plugin);
+#if BUILD_HTTPS
+ if (GNUNET_SYSERR == server_load_certificate (plugin))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Could not load or create server certificate! Loading plugin failed!\n"));
+ return GNUNET_SYSERR;
+ }
+#endif
+
+
+
+ plugin->server_v4 = NULL;
+ if (GNUNET_YES == plugin->use_ipv4)
+ {
+ plugin->server_v4
+ = run_mhd_start_daemon (plugin,
+ (const struct sockaddr_in *) plugin->server_addr_v4,
+ MHD_NO_FLAG);
+
+ if (NULL == plugin->server_v4)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "Failed to start %s IPv4 server component on port %u\n",
+ plugin->name,
+ plugin->port);
+ }
+ else
+ server_reschedule (plugin,
+ plugin->server_v4,
+ GNUNET_NO);
+ }
+
+
+ plugin->server_v6 = NULL;
+ if (GNUNET_YES == plugin->use_ipv6)
+ {
+ plugin->server_v6
+ = run_mhd_start_daemon (plugin,
+ (const struct sockaddr_in *) plugin->server_addr_v6,
+ MHD_USE_IPv6);
+ if (NULL == plugin->server_v6)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "Failed to start %s IPv6 server component on port %u\n",
+ plugin->name,
+ plugin->port);
+ }
+ else
+ {
+ server_reschedule (plugin,
+ plugin->server_v6,
+ GNUNET_NO);
+ }
+ }
+ msg = "No";
+ if ( (NULL == plugin->server_v6) &&
+ (NULL == plugin->server_v4) )
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "%s %s server component started on port %u\n",
+ msg,
+ plugin->name,
+ plugin->port);
+ return GNUNET_SYSERR;
+ }
+ if ((NULL != plugin->server_v6) &&
+ (NULL != plugin->server_v4))
+ msg = "IPv4 and IPv6";
+ else if (NULL != plugin->server_v6)
+ msg = "IPv6";
+ else if (NULL != plugin->server_v4)
+ msg = "IPv4";
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "%s %s server component started on port %u\n",
+ msg,
+ plugin->name,
+ plugin->port);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Add an address to the server's set of addresses and notify transport
+ *
+ * @param cls the plugin handle
+ * @param add_remove #GNUNET_YES on add, #GNUNET_NO on remove
+ * @param addr the address
+ * @param addrlen address length
+ */
+static void
+server_add_address (void *cls,
+ int add_remove,
+ const struct sockaddr *addr,
+ socklen_t addrlen)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct GNUNET_HELLO_Address *address;
+ struct HttpAddressWrapper *w = NULL;
+
+ w = GNUNET_new (struct HttpAddressWrapper);
+ w->address = http_common_address_from_socket (plugin->protocol,
+ addr,
+ addrlen);
+ if (NULL == w->address)
+ {
+ GNUNET_free (w);
+ return;
+ }
+ w->addrlen = http_common_address_get_size (w->address);
+
+ GNUNET_CONTAINER_DLL_insert (plugin->addr_head,
+ plugin->addr_tail,
+ w);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Notifying transport to add address `%s'\n",
+ http_common_plugin_address_to_string (plugin->protocol,
+ w->address,
+ w->addrlen));
+ /* modify our published address list */
+#if BUILD_HTTPS
+ address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ "https_client", w->address, w->addrlen, GNUNET_HELLO_ADDRESS_INFO_NONE);
+#else
+ address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ "http_client", w->address, w->addrlen, GNUNET_HELLO_ADDRESS_INFO_NONE);
+#endif
+
+ plugin->env->notify_address (plugin->env->cls,
+ add_remove,
+ address);
+ GNUNET_HELLO_address_free (address);
+}
+
+
+/**
+ * Remove an address from the server's set of addresses and notify transport
+ *
+ * @param cls the plugin handle
+ * @param add_remove #GNUNET_YES on add, #GNUNET_NO on remove
+ * @param addr the address
+ * @param addrlen address length
+ */
+static void
+server_remove_address (void *cls,
+ int add_remove,
+ const struct sockaddr *addr,
+ socklen_t addrlen)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct GNUNET_HELLO_Address *address;
+ struct HttpAddressWrapper *w = plugin->addr_head;
+ size_t saddr_len;
+ void * saddr;
+
+ saddr = http_common_address_from_socket (plugin->protocol,
+ addr,
+ addrlen);
+ if (NULL == saddr)
+ return;
+ saddr_len = http_common_address_get_size (saddr);
+
+ while (NULL != w)
+ {
+ if (GNUNET_YES ==
+ http_common_cmp_addresses (w->address,
+ w->addrlen,
+ saddr,
+ saddr_len))
+ break;
+ w = w->next;
+ }
+ GNUNET_free (saddr);
+
+ if (NULL == w)
+ return;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Notifying transport to remove address `%s'\n",
+ http_common_plugin_address_to_string (plugin->protocol,
+ w->address,
+ w->addrlen));
+ GNUNET_CONTAINER_DLL_remove (plugin->addr_head,
+ plugin->addr_tail,
+ w);
+ /* modify our published address list */
+#if BUILD_HTTPS
+ address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ "https_client", w->address, w->addrlen, GNUNET_HELLO_ADDRESS_INFO_NONE);
+#else
+ address = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ "http_client", w->address, w->addrlen, GNUNET_HELLO_ADDRESS_INFO_NONE);
+#endif
+ plugin->env->notify_address (plugin->env->cls, add_remove, address);
+ GNUNET_HELLO_address_free (address);
+ GNUNET_free (w->address);
+ GNUNET_free (w);
+}
+
+
+
+/**
+ * Our external IP address/port mapping has changed.
+ *
+ * @param cls closure, the 'struct LocalAddrList'
+ * @param add_remove #GNUNET_YES to mean the new public IP address, #GNUNET_NO to mean
+ * the previous (now invalid) one
+ * @param ac address class the address belongs to
+ * @param addr either the previous or the new public IP address
+ * @param addrlen actual lenght of the address
+ */
+static void
+server_nat_port_map_callback (void *cls,
+ int add_remove,
+ enum GNUNET_NAT_AddressClass ac,
+ const struct sockaddr *addr,
+ socklen_t addrlen)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "NAT called to %s address `%s'\n",
+ (add_remove == GNUNET_NO) ? "remove" : "add",
+ GNUNET_a2s (addr, addrlen));
+
+ if (AF_INET == addr->sa_family)
+ {
+ struct sockaddr_in *s4 = (struct sockaddr_in *) addr;
+
+ if (GNUNET_NO == plugin->use_ipv4)
+ return;
+
+ if ((NULL != plugin->server_addr_v4) &&
+ (0 != memcmp (&plugin->server_addr_v4->sin_addr,
+ &s4->sin_addr,
+ sizeof (struct in_addr))))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Skipping address `%s' (not bindto address)\n",
+ GNUNET_a2s (addr, addrlen));
+ return;
+ }
+ }
+
+ if (AF_INET6 == addr->sa_family)
+ {
+ struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) addr;
+ if (GNUNET_NO == plugin->use_ipv6)
+ return;
+
+ if ((NULL != plugin->server_addr_v6) &&
+ (0 != memcmp (&plugin->server_addr_v6->sin6_addr,
+ &s6->sin6_addr, sizeof (struct in6_addr))))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Skipping address `%s' (not bindto address)\n",
+ GNUNET_a2s (addr, addrlen));
+ return;
+ }
+ }
+
+ switch (add_remove)
+ {
+ case GNUNET_YES:
+ server_add_address (cls, add_remove, addr, addrlen);
+ break;
+ case GNUNET_NO:
+ server_remove_address (cls, add_remove, addr, addrlen);
+ break;
+ }
+}
+
+
+/**
+ * Get valid server addresses
+ *
+ * @param plugin the plugin handle
+ * @param service_name the servicename
+ * @param cfg configuration handle
+ * @param addrs addresses
+ * @param addr_lens address length
+ * @return number of addresses
+ */
+static int
+server_get_addresses (struct HTTP_Server_Plugin *plugin,
+ const char *service_name,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ struct sockaddr ***addrs,
+ socklen_t ** addr_lens)
+{
+ int disablev6;
+ unsigned long long port;
+ struct addrinfo hints;
+ struct addrinfo *res;
+ struct addrinfo *pos;
+ struct addrinfo *next;
+ unsigned int i;
+ int resi;
+ int ret;
+ struct sockaddr **saddrs;
+ socklen_t *saddrlens;
+ char *hostname;
+
+ *addrs = NULL;
+ *addr_lens = NULL;
+
+ disablev6 = !plugin->use_ipv6;
+
+ port = 0;
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name, "PORT"))
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_number (cfg, service_name,
+ "PORT", &port));
+ if (port > 65535)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Require valid port number for service in configuration!\n"));
+ return GNUNET_SYSERR;
+ }
+ }
+ if (0 == port)
+ {
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ "Starting in listen only mode\n");
+ return -1; /* listen only */
+ }
+
+
+ if (GNUNET_CONFIGURATION_have_value (cfg, service_name,
+ "BINDTO"))
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, service_name,
+ "BINDTO", &hostname));
+ }
+ else
+ hostname = NULL;
+
+ if (NULL != hostname)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Resolving `%s' since that is where `%s' will bind to.\n",
+ hostname, service_name);
+ memset (&hints, 0, sizeof (struct addrinfo));
+ if (disablev6)
+ hints.ai_family = AF_INET;
+ if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
+ (NULL == res))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to resolve `%s': %s\n"),
+ hostname,
+ gai_strerror (ret));
+ GNUNET_free (hostname);
+ return GNUNET_SYSERR;
+ }
+ next = res;
+ i = 0;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (pos->ai_family == AF_INET6))
+ continue;
+ i++;
+ }
+ if (0 == i)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to find %saddress for `%s'.\n"),
+ disablev6 ? "IPv4 " : "", hostname);
+ freeaddrinfo (res);
+ GNUNET_free (hostname);
+ return GNUNET_SYSERR;
+ }
+ resi = i;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ next = res;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (pos->ai_family == AF_INET6))
+ continue;
+ if ((pos->ai_protocol != IPPROTO_TCP) && (0 != pos->ai_protocol))
+ continue; /* not TCP */
+ if ((pos->ai_socktype != SOCK_STREAM) && (0 != pos->ai_socktype))
+ continue; /* huh? */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Service will bind to `%s'\n",
+ GNUNET_a2s (pos->ai_addr,
+ pos->ai_addrlen));
+ if (pos->ai_family == AF_INET)
+ {
+ GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ GNUNET_assert (pos->ai_family == AF_INET6);
+ GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ GNUNET_memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ }
+ i++;
+ }
+ GNUNET_free (hostname);
+ freeaddrinfo (res);
+ resi = i;
+ }
+ else
+ {
+ /* will bind against everything, just set port */
+ if (disablev6)
+ {
+ /* V4-only */
+ resi = 1;
+ i = 0;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ /* dual stack */
+ resi = 2;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ saddrlens[i] = sizeof (struct sockaddr_in6);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
+#endif
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ i++;
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ }
+ *addrs = saddrs;
+ *addr_lens = saddrlens;
+ return resi;
+}
+
+
+/**
+ * Ask NAT for addresses
+ *
+ * @param plugin the plugin handle
+ */
+static void
+server_start_report_addresses (struct HTTP_Server_Plugin *plugin)
+{
+ int res = GNUNET_OK;
+ struct sockaddr **addrs;
+ socklen_t *addrlens;
+
+ res = server_get_addresses (plugin,
+ plugin->name,
+ plugin->env->cfg,
+ &addrs, &addrlens);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("Found %u addresses to report to NAT service\n"),
+ res);
+
+ if (GNUNET_SYSERR == res)
+ {
+ plugin->nat = NULL;
+ return;
+ }
+
+ plugin->nat
+ = GNUNET_NAT_register (plugin->env->cfg,
+ "transport-http_server",
+ IPPROTO_TCP,
+ (unsigned int) res,
+ (const struct sockaddr **) addrs,
+ addrlens,
+ &server_nat_port_map_callback,
+ NULL,
+ plugin);
+ while (res > 0)
+ {
+ res--;
+ GNUNET_assert (NULL != addrs[res]);
+ GNUNET_free (addrs[res]);
+ }
+ GNUNET_free_non_null (addrs);
+ GNUNET_free_non_null (addrlens);
+}
+
+
+/**
+ * Stop NAT for addresses
+ *
+ * @param plugin the plugin handle
+ */
+static void
+server_stop_report_addresses (struct HTTP_Server_Plugin *plugin)
+{
+ struct HttpAddressWrapper *w;
+
+ /* Stop NAT handle */
+ if (NULL != plugin->nat)
+ {
+ GNUNET_NAT_unregister (plugin->nat);
+ plugin->nat = NULL;
+ }
+ /* Clean up addresses */
+ while (NULL != plugin->addr_head)
+ {
+ w = plugin->addr_head;
+ GNUNET_CONTAINER_DLL_remove (plugin->addr_head,
+ plugin->addr_tail,
+ w);
+ GNUNET_free (w->address);
+ GNUNET_free (w);
+ }
+}
+
+
+/**
+ * Check if IPv6 supported on this system
+ *
+ * @param plugin the plugin handle
+ * @return #GNUNET_YES on success, else #GNUNET_NO
+ */
+static int
+server_check_ipv6_support (struct HTTP_Server_Plugin *plugin)
+{
+ struct GNUNET_NETWORK_Handle *desc = NULL;
+ int res = GNUNET_NO;
+
+ /* Probe IPv6 support */
+ desc = GNUNET_NETWORK_socket_create (PF_INET6,
+ SOCK_STREAM,
+ 0);
+ if (NULL == desc)
+ {
+ if ( (errno == ENOBUFS) ||
+ (errno == ENOMEM) ||
+ (errno == ENFILE) ||
+ (errno == EACCES) )
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
+ "socket");
+ }
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Disabling IPv6 since it is not supported on this system!\n"));
+ res = GNUNET_NO;
+ }
+ else
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_NETWORK_socket_close (desc));
+ desc = NULL;
+ res = GNUNET_YES;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Testing IPv6 on this system: %s\n",
+ (res == GNUNET_YES) ? "successful" : "failed");
+ return res;
+}
+
+
+/**
+ * Notify server about our external hostname
+ *
+ * @param cls plugin
+ */
+static void
+server_notify_external_hostname (void *cls)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct HttpAddress *ext_addr;
+ size_t ext_addr_len;
+ unsigned int urlen;
+ char *url;
+
+ plugin->notify_ext_task = NULL;
+ GNUNET_asprintf (&url,
+ "%s://%s",
+ plugin->protocol,
+ plugin->external_hostname);
+ urlen = strlen (url) + 1;
+ ext_addr = GNUNET_malloc (sizeof (struct HttpAddress) + urlen);
+ ext_addr->options = htonl (plugin->options);
+ ext_addr->urlen = htonl (urlen);
+ ext_addr_len = sizeof (struct HttpAddress) + urlen;
+ GNUNET_memcpy (&ext_addr[1], url, urlen);
+ GNUNET_free (url);
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Notifying transport about external hostname address `%s'\n",
+ plugin->external_hostname);
+
+#if BUILD_HTTPS
+ if (GNUNET_YES == plugin->verify_external_hostname)
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ "Enabling SSL verification for external hostname address `%s'\n",
+ plugin->external_hostname);
+ plugin->ext_addr
+ = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ "https_client",
+ ext_addr,
+ ext_addr_len,
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
+ plugin->env->notify_address (plugin->env->cls,
+ GNUNET_YES,
+ plugin->ext_addr);
+ GNUNET_free (ext_addr);
+#else
+ plugin->ext_addr
+ = GNUNET_HELLO_address_allocate (plugin->env->my_identity,
+ "http_client",
+ ext_addr,
+ ext_addr_len,
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
+ plugin->env->notify_address (plugin->env->cls,
+ GNUNET_YES,
+ plugin->ext_addr);
+ GNUNET_free (ext_addr);
+#endif
+}
+
+
+/**
+ * Configure the plugin
+ *
+ * @param plugin plugin handle
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ */
+static int
+server_configure_plugin (struct HTTP_Server_Plugin *plugin)
+{
+ unsigned long long port;
+ unsigned long long max_connections;
+ char *bind4_address = NULL;
+ char *bind6_address = NULL;
+ char *eh_tmp = NULL;
+ int external_hostname_use_port;
+
+ /* Use IPv4? */
+ if (GNUNET_CONFIGURATION_have_value
+ (plugin->env->cfg, plugin->name, "USE_IPv4"))
+ {
+ plugin->use_ipv4 =
+ GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ plugin->name,
+ "USE_IPv4");
+ }
+ else
+ plugin->use_ipv4 = GNUNET_YES;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("IPv4 support is %s\n"),
+ (plugin->use_ipv4 == GNUNET_YES) ? "enabled" : "disabled");
+
+ /* Use IPv6? */
+ if (GNUNET_CONFIGURATION_have_value
+ (plugin->env->cfg, plugin->name, "USE_IPv6"))
+ {
+ plugin->use_ipv6 =
+ GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ plugin->name,
+ "USE_IPv6");
+ }
+ else
+ plugin->use_ipv6 = GNUNET_YES;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("IPv6 support is %s\n"),
+ (plugin->use_ipv6 == GNUNET_YES) ? "enabled" : "disabled");
+
+ if ((plugin->use_ipv4 == GNUNET_NO) && (plugin->use_ipv6 == GNUNET_NO))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Neither IPv4 nor IPv6 are enabled! Fix in configuration\n"));
+ return GNUNET_SYSERR;
+ }
+
+ /* Reading port number from config file */
+ if ((GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg,
+ plugin->name,
+ "PORT", &port)) || (port > 65535))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Port is required! Fix in configuration\n"));
+ return GNUNET_SYSERR;
+ }
+ plugin->port = port;
+
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Using port %u\n"), plugin->port);
+
+ if ( (plugin->use_ipv4 == GNUNET_YES) &&
+ (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
+ plugin->name,
+ "BINDTO",
+ &bind4_address)))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding %s plugin to specific IPv4 address: `%s'\n",
+ plugin->protocol,
+ bind4_address);
+ plugin->server_addr_v4 = GNUNET_new (struct sockaddr_in);
+ if (1 != inet_pton (AF_INET,
+ bind4_address,
+ &plugin->server_addr_v4->sin_addr))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Specific IPv4 address `%s' in configuration file is invalid!\n"),
+ bind4_address);
+ GNUNET_free (bind4_address);
+ GNUNET_free (plugin->server_addr_v4);
+ plugin->server_addr_v4 = NULL;
+ return GNUNET_SYSERR;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding to IPv4 address %s\n",
+ bind4_address);
+ plugin->server_addr_v4->sin_family = AF_INET;
+ plugin->server_addr_v4->sin_port = htons (plugin->port);
+ }
+ GNUNET_free (bind4_address);
+ }
+
+ if ((plugin->use_ipv6 == GNUNET_YES) &&
+ (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
+ plugin->name,
+ "BINDTO6",
+ &bind6_address)))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding %s plugin to specific IPv6 address: `%s'\n",
+ plugin->protocol, bind6_address);
+ plugin->server_addr_v6 = GNUNET_new (struct sockaddr_in6);
+ if (1 !=
+ inet_pton (AF_INET6,
+ bind6_address,
+ &plugin->server_addr_v6->sin6_addr))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Specific IPv6 address `%s' in configuration file is invalid!\n"),
+ bind6_address);
+ GNUNET_free (bind6_address);
+ GNUNET_free (plugin->server_addr_v6);
+ plugin->server_addr_v6 = NULL;
+ return GNUNET_SYSERR;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Binding to IPv6 address %s\n",
+ bind6_address);
+ plugin->server_addr_v6->sin6_family = AF_INET6;
+ plugin->server_addr_v6->sin6_port = htons (plugin->port);
+ }
+ GNUNET_free (bind6_address);
+ }
+
+ plugin->verify_external_hostname = GNUNET_NO;
+#if BUILD_HTTPS
+ plugin->verify_external_hostname
+ = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ plugin->name,
+ "VERIFY_EXTERNAL_HOSTNAME");
+ if (GNUNET_SYSERR == plugin->verify_external_hostname)
+ plugin->verify_external_hostname = GNUNET_NO;
+ if (GNUNET_YES == plugin->verify_external_hostname)
+ plugin->options |= HTTP_OPTIONS_VERIFY_CERTIFICATE;
+#endif
+ external_hostname_use_port
+ = GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ plugin->name,
+ "EXTERNAL_HOSTNAME_USE_PORT");
+ if (GNUNET_SYSERR == external_hostname_use_port)
+ external_hostname_use_port = GNUNET_NO;
+
+
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
+ plugin->name,
+ "EXTERNAL_HOSTNAME",
+ &eh_tmp))
+ {
+ char *tmp;
+ char *pos = NULL;
+ char *pos_url = NULL;
+
+ if (NULL != strstr(eh_tmp, "://"))
+ tmp = &strstr(eh_tmp, "://")[3];
+ else
+ tmp = eh_tmp;
+
+ if (GNUNET_YES == external_hostname_use_port)
+ {
+ if ( (strlen (tmp) > 1) && (NULL != (pos = strchr(tmp, '/'))) )
+ {
+ pos_url = pos + 1;
+ pos[0] = '\0';
+ GNUNET_asprintf (&plugin->external_hostname,
+ "%s:%u/%s",
+ tmp,
+ (uint16_t) port,
+ pos_url);
+ }
+ else
+ GNUNET_asprintf (&plugin->external_hostname,
+ "%s:%u",
+ tmp,
+ (uint16_t) port);
+ }
+ else
+ plugin->external_hostname = GNUNET_strdup (tmp);
+ GNUNET_free (eh_tmp);
+
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Using external hostname `%s'\n"),
+ plugin->external_hostname);
+ plugin->notify_ext_task = GNUNET_SCHEDULER_add_now (&server_notify_external_hostname,
+ plugin);
+
+ /* Use only configured external hostname */
+ if (GNUNET_CONFIGURATION_have_value
+ (plugin->env->cfg,
+ plugin->name,
+ "EXTERNAL_HOSTNAME_ONLY"))
+ {
+ plugin->external_only =
+ GNUNET_CONFIGURATION_get_value_yesno (plugin->env->cfg,
+ plugin->name,
+ "EXTERNAL_HOSTNAME_ONLY");
+ }
+ else
+ plugin->external_only = GNUNET_NO;
+
+ if (GNUNET_YES == plugin->external_only)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("Notifying transport only about hostname `%s'\n"),
+ plugin->external_hostname);
+ }
+ else
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "No external hostname configured\n");
+
+ /* Optional parameters */
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg,
+ plugin->name,
+ "MAX_CONNECTIONS",
+ &max_connections))
+ max_connections = 128;
+ plugin->max_request = max_connections;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("Maximum number of connections is %u\n"),
+ plugin->max_request);
+
+ plugin->peer_id_length = strlen (GNUNET_i2s_full (plugin->env->my_identity));
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Exit point from the plugin.
+ *
+ * @param cls api
+ * @return NULL
+ */
+void *
+LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
+{
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct HTTP_Server_Plugin *plugin = api->cls;
+
+ if (NULL == api->cls)
+ {
+ /* Free for stub mode */
+ GNUNET_free (api);
+ return NULL;
+ }
+ plugin->in_shutdown = GNUNET_YES;
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ _("Shutting down plugin `%s'\n"),
+ plugin->name);
+
+ if (NULL != plugin->notify_ext_task)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->notify_ext_task);
+ plugin->notify_ext_task = NULL;
+ }
+
+ if (NULL != plugin->ext_addr)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Notifying transport to remove address `%s'\n",
+ http_common_plugin_address_to_string (plugin->protocol,
+ plugin->ext_addr->address,
+ plugin->ext_addr->address_length));
+#if BUILD_HTTPS
+ plugin->env->notify_address (plugin->env->cls,
+ GNUNET_NO,
+ plugin->ext_addr);
+#else
+ plugin->env->notify_address (plugin->env->cls,
+ GNUNET_NO,
+ plugin->ext_addr);
+#endif
+ GNUNET_HELLO_address_free (plugin->ext_addr);
+ plugin->ext_addr = NULL;
+ }
+
+ /* Stop to report addresses to transport service */
+ server_stop_report_addresses (plugin);
+ if (NULL != plugin->server_v4_task)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_v4_task);
+ plugin->server_v4_task = NULL;
+ }
+
+ if (NULL != plugin->server_v6_task)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->server_v6_task);
+ plugin->server_v6_task = NULL;
+ }
+#if BUILD_HTTPS
+ GNUNET_free_non_null (plugin->crypto_init);
+ GNUNET_free_non_null (plugin->cert);
+ GNUNET_free_non_null (plugin->key);
+#endif
+ GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
+ &destroy_session_shutdown_cb,
+ plugin);
+ GNUNET_CONTAINER_multipeermap_destroy (plugin->sessions);
+ plugin->sessions = NULL;
+ if (NULL != plugin->server_v4)
+ {
+ MHD_stop_daemon (plugin->server_v4);
+ plugin->server_v4 = NULL;
+ }
+ if (NULL != plugin->server_v6)
+ {
+ MHD_stop_daemon (plugin->server_v6);
+ plugin->server_v6 = NULL;
+ }
+ /* Clean up */
+ GNUNET_free_non_null (plugin->external_hostname);
+ GNUNET_free_non_null (plugin->ext_addr);
+ GNUNET_free_non_null (plugin->server_addr_v4);
+ GNUNET_free_non_null (plugin->server_addr_v6);
+ regfree (&plugin->url_regex);
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ _("Shutdown for plugin `%s' complete\n"),
+ plugin->name);
+
+ GNUNET_free (plugin);
+ GNUNET_free (api);
+ return NULL;
+}
+
+
+/**
+ * Function called for a quick conversion of the binary address to
* a numeric address. Note that the caller must not free the
* address and that the next call to this function is allowed
* to override the address again.
*
- * @param cls closure
+ * @param cls unused
* @param addr binary address
* @param addrlen length of the address
* @return string representing the same address
*/
static const char *
-http_server_plugin_address_to_string (void *cls, const void *addr, size_t addrlen)
+http_server_plugin_address_to_string (void *cls,
+ const void *addr,
+ size_t addrlen)
{
- GNUNET_break (0);
- return NULL;
+ return http_common_plugin_address_to_string (PLUGIN_NAME,
+ addr,
+ addrlen);
+}
+
+
+/**
+ * Function obtain the network type for a session
+ *
+ * @param cls closure (`struct HTTP_Server_Plugin *`)
+ * @param session the session
+ * @return the network type in HBO or #GNUNET_SYSERR
+ */
+static enum GNUNET_ATS_Network_Type
+http_server_plugin_get_network (void *cls,
+ struct GNUNET_ATS_Session *session)
+{
+ return session->scope;
+}
+
+
+/**
+ * Function obtain the network type for an address.
+ *
+ * @param cls closure (`struct Plugin *`)
+ * @param address the address
+ * @return the network type
+ */
+static enum GNUNET_ATS_Network_Type
+http_server_plugin_get_network_for_address (void *cls,
+ const struct GNUNET_HELLO_Address *address)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ return http_common_get_network_for_address (plugin->env,
+ address);
+}
+
+
+/**
+ * Function that will be called whenever the transport service wants to
+ * notify the plugin that the inbound quota changed and that the plugin
+ * should update it's delay for the next receive value
+ *
+ * @param cls closure
+ * @param peer which peer was the session for
+ * @param session which session is being updated
+ * @param delay new delay to use for receiving
+ */
+static void
+http_server_plugin_update_inbound_delay (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_ATS_Session *session,
+ struct GNUNET_TIME_Relative delay)
+{
+ session->next_receive = GNUNET_TIME_relative_to_absolute (delay);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New inbound delay %s\n",
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_NO));
+ if (NULL != session->recv_wakeup_task)
+ {
+ GNUNET_SCHEDULER_cancel (session->recv_wakeup_task);
+ session->recv_wakeup_task
+ = GNUNET_SCHEDULER_add_delayed (delay,
+ &server_wake_up,
+ session);
+ }
+}
+
+
+/**
+ * Return information about the given session to the
+ * monitor callback.
+ *
+ * @param cls the `struct Plugin` with the monitor callback (`sic`)
+ * @param peer peer we send information about
+ * @param value our `struct GNUNET_ATS_Session` to send information about
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+send_session_info_iter (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+ struct GNUNET_ATS_Session *session = value;
+
+ notify_session_monitor (plugin,
+ session,
+ GNUNET_TRANSPORT_SS_INIT);
+ return GNUNET_OK;
}
+/**
+ * Begin monitoring sessions of a plugin. There can only
+ * be one active monitor per plugin (i.e. if there are
+ * multiple monitors, the transport service needs to
+ * multiplex the generated events over all of them).
+ *
+ * @param cls closure of the plugin
+ * @param sic callback to invoke, NULL to disable monitor;
+ * plugin will being by iterating over all active
+ * sessions immediately and then enter monitor mode
+ * @param sic_cls closure for @a sic
+ */
+static void
+http_server_plugin_setup_monitor (void *cls,
+ GNUNET_TRANSPORT_SessionInfoCallback sic,
+ void *sic_cls)
+{
+ struct HTTP_Server_Plugin *plugin = cls;
+
+ plugin->sic = sic;
+ plugin->sic_cls = sic_cls;
+ if (NULL != sic)
+ {
+ GNUNET_CONTAINER_multipeermap_iterate (plugin->sessions,
+ &send_session_info_iter,
+ plugin);
+ /* signal end of first iteration */
+ sic (sic_cls, NULL, NULL);
+ }
+}
/**
* Entry point for the plugin.
+ *
+ * @param cls env
+ * @return api
*/
void *
LIBGNUNET_PLUGIN_TRANSPORT_INIT (void *cls)
{
struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
struct GNUNET_TRANSPORT_PluginFunctions *api;
- struct Plugin *plugin;
+ struct HTTP_Server_Plugin *plugin;
- plugin = GNUNET_malloc (sizeof (struct Plugin));
+ if (NULL == env->receive)
+ {
+ /* run in 'stub' mode (i.e. as part of gnunet-peerinfo), don't fully
+ initialze the plugin or the API */
+ api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
+ api->cls = NULL;
+ api->address_to_string = &http_server_plugin_address_to_string;
+ api->string_to_address = &http_common_plugin_string_to_address;
+ api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
+ return api;
+ }
+ plugin = GNUNET_new (struct HTTP_Server_Plugin);
plugin->env = env;
- api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+ plugin->sessions = GNUNET_CONTAINER_multipeermap_create (128,
+ GNUNET_YES);
+
+ api = GNUNET_new (struct GNUNET_TRANSPORT_PluginFunctions);
api->cls = plugin;
api->send = &http_server_plugin_send;
- api->disconnect = &http_server_plugin_disconnect;
- api->address_pretty_printer = &http_server_plugin_address_pretty_printer;
+ api->disconnect_peer = &http_server_plugin_disconnect_peer;
+ api->disconnect_session = &http_server_plugin_disconnect_session;
+ api->query_keepalive_factor = &http_server_query_keepalive_factor;
api->check_address = &http_server_plugin_address_suggested;
+ api->get_session = &http_server_plugin_get_session;
+
api->address_to_string = &http_server_plugin_address_to_string;
- return api;
-}
+ api->string_to_address = &http_common_plugin_string_to_address;
+ api->address_pretty_printer = &http_common_plugin_address_pretty_printer;
+ api->get_network = &http_server_plugin_get_network;
+ api->get_network_for_address = &http_server_plugin_get_network_for_address;
+ api->update_session_timeout = &http_server_plugin_update_session_timeout;
+ api->update_inbound_delay = &http_server_plugin_update_inbound_delay;
+ api->setup_monitor = &http_server_plugin_setup_monitor;
+#if BUILD_HTTPS
+ plugin->name = "transport-https_server";
+ plugin->protocol = "https";
+#else
+ plugin->name = "transport-http_server";
+ plugin->protocol = "http";
+#endif
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ plugin->name,
+ "TCP_STEALTH"))
+ {
+#ifdef TCP_STEALTH
+ plugin->options |= HTTP_OPTIONS_TCP_STEALTH;
+#else
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("TCP_STEALTH not supported on this platform.\n"));
+ LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
+ return NULL;
+#endif
+ }
-/**
- * Exit point from the plugin.
- */
-void *
-LIBGNUNET_PLUGIN_TRANSPORT_DONE (void *cls)
-{
- struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
- struct Plugin *plugin = api->cls;
+ /* Compile URL regex */
+ if (regcomp (&plugin->url_regex,
+ URL_REGEX,
+ REG_EXTENDED))
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Unable to compile URL regex\n"));
+ LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
+ return NULL;
+ }
- GNUNET_free (plugin);
- GNUNET_free (api);
- return NULL;
+ /* Configure plugin */
+ if (GNUNET_SYSERR == server_configure_plugin (plugin))
+ {
+ LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
+ return NULL;
+ }
+
+ /* Check IPv6 support */
+ if (GNUNET_YES == plugin->use_ipv6)
+ plugin->use_ipv6 = server_check_ipv6_support (plugin);
+
+ /* Report addresses to transport service */
+ if (GNUNET_NO == plugin->external_only)
+ server_start_report_addresses (plugin);
+
+ if (GNUNET_SYSERR == server_start (plugin))
+ {
+ LIBGNUNET_PLUGIN_TRANSPORT_DONE (api);
+ return NULL;
+ }
+ return api;
}
/* end of plugin_transport_http_server.c */
projects / oweals / gnunet.git / blobdiff