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- /*
- This file is part of GNUnet
- Copyright (C) 2002-2014 Christian Grothoff (and other contributing authors)
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
- */
- /**
- * @file transport/plugin_transport_http_server.c
- * @brief HTTP/S server transport plugin
- * @author Matthias Wachs
- * @author David Barksdale
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet_util_lib.h"
- #include "gnunet_statistics_service.h"
- #include "gnunet_transport_plugin.h"
- #include "gnunet_nat_lib.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__)
- /**
- * Information we keep with MHD for an HTTP request.
- */
- struct ServerRequest
- {
- /**
- * The session this server request belongs to
- * Can be NULL, when session was disconnected and freed
- */
- struct 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;
- };
- /**
- * Wrapper to manage addresses
- */
- 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;
- };
- /**
- * Message to send using http
- */
- struct HTTP_Message
- {
- /**
- * next pointer for double linked list
- */
- struct HTTP_Message *next;
- /**
- * previous pointer for double linked list
- */
- struct HTTP_Message *prev;
- /**
- * buffer containing data to send
- */
- char *buf;
- /**
- * amount of data already sent
- */
- size_t pos;
- /**
- * buffer length
- */
- size_t size;
- /**
- * HTTP/S specific overhead
- */
- size_t overhead;
- /**
- * Continuation function to call once the transmission buffer
- * has again space available. NULL if there is no
- * continuation to call.
- */
- GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
- /**
- * Closure for transmit_cont.
- */
- void *transmit_cont_cls;
- };
- /**
- * Session handle for connections.
- */
- struct Session
- {
- /**
- * To whom are we talking to (set to our identity
- * if we are still waiting for the welcome message)
- */
- struct GNUNET_PeerIdentity target;
- /**
- * 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_SERVER_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
- */
- uint32_t tag;
- /**
- * ATS network type.
- */
- enum GNUNET_ATS_Network_Type scope;
- /**
- * #GNUNET_YES if this session is known to the service.
- */
- int known_to_service;
- };
- /**
- * Encapsulation of all of the state of the plugin.
- */
- struct HTTP_Server_Plugin
- {
- /**
- * Our environment.
- */
- struct GNUNET_TRANSPORT_PluginEnvironment *env;
- /**
- * 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
- */
- uint16_t port;
- /**
- * Regex for parsing URLs. FIXME: this seems overkill.
- */
- regex_t url_regex;
- };
- /**
- * If a session monitor is attached, notify it about the new
- * session state.
- *
- * @param plugin our plugin
- * @param session session that changed state
- * @param state new state of the session
- */
- static void
- notify_session_monitor (struct HTTP_Server_Plugin *plugin,
- struct Session *session,
- enum GNUNET_TRANSPORT_SessionState state)
- {
- struct GNUNET_TRANSPORT_SessionInfo info;
- 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);
- }
- /**
- * Wake up an MHD connection which was suspended
- *
- * @param cls the session
- * @param tc task context
- */
- static void
- server_wake_up (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- struct Session *s = cls;
- s->recv_wakeup_task = NULL;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Session %p: Waking up PUT handle\n",
- s);
- MHD_resume_connection (s->server_recv->mhd_conn);
- }
- /**
- * 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);
- /**
- * Deletes the session. Must not be used afterwards.
- *
- * @param s the session to delete
- */
- static void
- server_delete_session (struct Session *s)
- {
- struct HTTP_Server_Plugin *plugin = s->plugin;
- struct HTTP_Message *msg;
- 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)
- 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 */);
- 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_SERVER_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);
- }
- /**
- * 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 Session *s)
- {
- server_delete_session (s);
- return GNUNET_OK;
- }
- /**
- * Session was idle, so disconnect it
- *
- * @param cls the session
- * @param tc task context
- */
- static void
- server_session_timeout (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- struct 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 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 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;
- 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)
- 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 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 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);
- GNUNET_free_non_null (sc_send);
- GNUNET_free_non_null (sc_recv);
- return GNUNET_OK;
- }
- /**
- * Terminate session.
- *
- * @param cls the `struct HTTP_Server_Plugin *`
- * @param peer for which this is a session
- * @param value the `struct 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 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 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
- * @param tc task context
- */
- static void
- server_v4_run (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- struct HTTP_Server_Plugin *plugin = cls;
- plugin->server_v4_task = NULL;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- 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
- * @param tc task context
- */
- static void
- server_v6_run (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- struct HTTP_Server_Plugin *plugin = cls;
- plugin->server_v6_task = NULL;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- 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 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 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 SessionTagContext
- {
- /**
- * Set to session matching the tag.
- */
- struct Session *res;
- /**
- * Tag we are looking for.
- */
- uint32_t tag;
- };
- /**
- * Find a session with a matching tag.
- *
- * @param cls the `struct SessionTagContext *`
- * @param key peer identity (unused)
- * @param value the `struct 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 SessionTagContext *stc = cls;
- struct 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 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 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;
- 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 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);
- }
- if ( (NULL == s->server_recv) ||
- (NULL == s->server_send) )
- {
- to = (HTTP_SERVER_NOT_VALIDATED_TIMEOUT.rel_value_us / 1000LL / 1000LL);
- MHD_set_connection_option (mhd_connection,
- MHD_CONNECTION_OPTION_TIMEOUT, to);
- server_reschedule (plugin, sc->mhd_daemon, GNUNET_NO);
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Session %p for peer `%s' fully connected\n",
- s, GNUNET_i2s (&target));
- to = (HTTP_SERVER_SESSION_TIMEOUT.rel_value_us / 1000LL / 1000LL);
- server_mhd_connection_timeout (plugin, s, to);
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Setting timeout for %p to %u sec.\n", sc, 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 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);
- 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;
- }
- return bytes_read;
- }
- /**
- * Callback called by MessageStreamTokenizer when a message has arrived
- *
- * @param cls current session as closure
- * @param client client
- * @param message the message to be forwarded to transport service
- * @return #GNUNET_OK
- */
- static int
- server_receive_mst_cb (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *message)
- {
- struct 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 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_data (strlen (HTTP_ERROR_RESPONSE),
- HTTP_ERROR_RESPONSE,
- MHD_NO,
- MHD_NO);
- 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_data (strlen ("Thank you!"),
- "Thank you!", MHD_NO, MHD_NO);
- 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_data (strlen ("Thank you!"),
- "Thank you!", MHD_NO, MHD_NO);
- 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_SERVER_mst_create (&server_receive_mst_cb, s);
- }
- GNUNET_SERVER_mst_receive (s->msg_tk, s, 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);
- 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_SERVER_mst_destroy (sc->session->msg_tk);
- sc->session->msg_tk = NULL;
- }
- }
- }
- GNUNET_free (sc);
- plugin->cur_request--;
- }
- /**
- * 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_SERVER_MAX_MESSAGE_SIZE),
- MHD_OPTION_NOTIFY_COMPLETED,
- &server_disconnect_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 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,
- 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]);
- 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]);
- 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,
- GNUNET_YES,
- plugin->port,
- (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
- * @param tc task context (unused)
- */
- static void
- server_notify_external_hostname (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- 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;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- 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;
- 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,
- (NULL == pos_url) ? "" : 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)
- {
- 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;
- }
- 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;
- /* 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 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)
- {
- 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 Session *session)
- {
- return session->scope;
- }
- /**
- * 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 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 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 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 HTTP_Server_Plugin *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;
- 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_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;
- 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->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
- }
- /* 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;
- }
- /* 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 */
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