/*
This file is part of GNUnet
- (C) 2003, 2004, 2005, 2006, 2007, 2008 Christian Grothoff (and other contributing authors)
+ (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
/**
* @file transport/plugin_transport_http.c
* @brief Implementation of the HTTP transport service
- * @author Christian Grothoff
+ * @author Matthias Wachs
*/
#include "platform.h"
-#include "gnunet_util.h"
#include "gnunet_protocols.h"
-#include "gnunet_transport.h"
-#include "gnunet_stats_service.h"
-#include "gnunet_upnp_service.h"
-#include <stdint.h>
-#include <microhttpd.h>
-#include <curl/curl.h>
-#include "ip.h"
+#include "gnunet_connection_lib.h"
+#include "gnunet_server_lib.h"
+#include "gnunet_service_lib.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_transport_service.h"
+#include "plugin_transport.h"
-#define DEBUG_HTTP GNUNET_NO
+#define DEBUG_HTTP GNUNET_YES
/**
- * Disable GET (for debugging only!). Must be GNUNET_YES
- * in production use!
+ * After how long do we expire an address that we
+ * learned from another peer if it is not reconfirmed
+ * by anyone?
*/
-#define DO_GET GNUNET_YES
+#define LEARNED_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 6)
-/**
- * After how much time of the core not being associated with a http
- * connection anymore do we close it?
- *
- * Needs to be larger than SECONDS_INACTIVE_DROP in
- * core's connection.s
- */
-#define HTTP_TIMEOUT (600 * GNUNET_CRON_SECONDS)
-
-/**
- * How often do we re-issue GET requests?
- */
-#define HTTP_GET_REFRESH (5 * GNUNET_CRON_SECONDS)
/**
- * Default maximum size of the HTTP read and write buffer.
+ * Encapsulation of all of the state of the plugin.
*/
-#define HTTP_BUF_SIZE (64 * 1024)
-
-/**
- * Text of the response sent back after the last bytes of a PUT
- * request have been received (just to formally obey the HTTP
- * protocol).
- */
-#define HTTP_PUT_RESPONSE "Thank you!"
-
-#define MY_TRANSPORT_NAME "HTTP"
-#include "common.c"
-
-/**
- * Client-side data per PUT request.
- */
-struct HTTPPutData
-{
- /**
- * This is a linked list.
- */
- struct HTTPPutData *next;
-
- /**
- * Handle to our CURL request.
- */
- CURL *curl_put;
+struct Plugin;
- /**
- * Last time we made progress with the PUT.
- */
- GNUNET_CronTime last_activity;
-
- /**
- * The message we are sending.
- */
- char *msg;
-
- /**
- * Size of msg.
- */
- unsigned int size;
-
- /**
- * Current position in msg.
- */
- unsigned int pos;
-
- /**
- * Are we done sending? Set to 1 after we
- * completed sending and started to receive
- * a response ("Thank you!") or once the
- * timeout has been reached.
- */
- int done;
-
-};
/**
- * Server-side data per PUT request.
+ * Session handle for connections.
*/
-struct MHDPutData
+struct Session
{
- /**
- * This is a linked list.
- */
- struct MHDPutData *next;
/**
- * MHD connection handle for this request.
+ * Stored in a linked list.
*/
- struct MHD_Connection *session;
+ struct Session *next;
/**
- * Last time we received data on this PUT
- * connection.
+ * Pointer to the global plugin struct.
*/
- GNUNET_CronTime last_activity;
+ struct Plugin *plugin;
/**
- * Read buffer for the header (from PUT)
+ * The client (used to identify this connection)
*/
- char rbuff1[sizeof (GNUNET_MessageHeader)];
+ /* void *client; */
/**
- * The read buffer (used only receiving PUT data).
+ * Continuation function to call once the transmission buffer
+ * has again space available. NULL if there is no
+ * continuation to call.
*/
- char *rbuff2;
+ GNUNET_TRANSPORT_TransmitContinuation transmit_cont;
/**
- * Number of valid bytes in rbuff1
+ * Closure for transmit_cont.
*/
- unsigned int rpos1;
+ void *transmit_cont_cls;
/**
- * Number of valid bytes in rbuff2
+ * To whom are we talking to (set to our identity
+ * if we are still waiting for the welcome message)
*/
- unsigned int rpos2;
-
+ struct GNUNET_PeerIdentity sender;
/**
- * Size of the rbuff2 buffer.
+ * At what time did we reset last_received last?
*/
- unsigned int rsize2;
+ struct GNUNET_TIME_Absolute last_quota_update;
/**
- * Should we sent a response for this PUT yet?
+ * How many bytes have we received since the "last_quota_update"
+ * timestamp?
*/
- int ready;
+ uint64_t last_received;
/**
- * Have we sent a response for this PUT yet?
+ * Number of bytes per ms that this peer is allowed
+ * to send to us.
*/
- int done;
+ uint32_t quota;
};
/**
- * Server-side data for a GET request.
+ * Encapsulation of all of the state of the plugin.
*/
-struct MHDGetData
+struct Plugin
{
-
- /**
- * This is a linked list.
- */
- struct MHDGetData *next;
-
- /**
- * MHD connection handle for this request.
- */
- struct MHD_Connection *session;
-
- /**
- * GET session response handle
- */
- struct MHD_Response *get;
-
- /**
- * My HTTP session.
- */
- struct HTTPSession *httpsession;
-
- /**
- * The write buffer (for sending GET response)
- */
- char *wbuff;
-
- /**
- * What was the last time we were able to
- * transmit data using the current get handle?
- */
- GNUNET_CronTime last_get_activity;
-
/**
- * Current write position in wbuff
+ * Our environment.
*/
- unsigned int woff;
+ struct GNUNET_TRANSPORT_PluginEnvironment *env;
/**
- * Number of valid bytes in wbuff (starting at woff)
+ * List of open sessions.
*/
- unsigned int wpos;
+ struct Session *sessions;
/**
- * Size of the write buffer.
+ * Handle for the statistics service.
*/
- unsigned int wsize;
+ struct GNUNET_STATISTICS_Handle *statistics;
};
/**
- * Transport Session handle.
- */
-typedef struct HTTPSession
-{
-
- /**
- * GNUNET_TSession for this session.
- */
- GNUNET_TSession *tsession;
-
- /**
- * To whom are we talking to.
- */
- GNUNET_PeerIdentity sender;
-
- /**
- * number of users of this session
- */
- unsigned int users;
-
- /**
- * Has this session been destroyed?
- */
- int destroyed;
-
- /**
- * Are we client or server? Determines which of the
- * structs in the union below is being used for this
- * connection!
- */
- int is_client;
-
- /**
- * Is MHD still using this session handle?
- */
- int is_mhd_active;
-
- /**
- * Data maintained for the http client-server connection
- * (depends on if we are client or server).
- */
- union
- {
-
- struct
- {
- /**
- * Active PUT requests (linked list).
- */
- struct MHDPutData *puts;
-
-#if DO_GET
- /**
- * Active GET requests (linked list; most
- * recent received GET is the head of the list).
- */
- struct MHDGetData *gets;
-#endif
-
- } server;
-
- struct
- {
-
- /**
- * Address of the other peer.
- */
- HostAddress address;
-
-#if DO_GET
- /**
- * Last time the GET was active.
- */
- GNUNET_CronTime last_get_activity;
-
- /**
- * What was the last time we were able to
- * transmit data using the current get handle?
- */
- GNUNET_CronTime last_get_initiated;
-
- /**
- * GET operation
- */
- CURL *get;
-
- /**
- * Read buffer for the header (from GET).
- */
- char rbuff1[sizeof (GNUNET_MessageHeader)];
-
- /**
- * The read buffer (used only receiving GET data).
- */
- char *rbuff2;
-
- /**
- * Number of valid bytes in rbuff1
- */
- unsigned int rpos1;
-
- /**
- * Number of valid bytes in rbuff2
- */
- unsigned int rpos2;
-
- /**
- * Current size of the read buffer rbuff2.
- */
- unsigned int rsize2;
-#endif
-
- /**
- * URL of the get and put operations.
- */
- char *url;
-
- /**
- * Linked list of PUT operations.
- */
- struct HTTPPutData *puts;
-
- } client;
-
- } cs;
-
-} HTTPSession;
-
-/* *********** globals ************* */
-
-static int stat_bytesReceived;
-
-static int stat_bytesSent;
-
-static int stat_bytesDropped;
-
-static int stat_get_issued;
-
-static int stat_get_received;
-
-static int stat_put_issued;
-
-static int stat_put_received;
-
-static int stat_select_calls;
-
-static int stat_send_calls;
-
-static int stat_connect_calls;
-
-static int stat_curl_send_callbacks;
-
-static int stat_curl_receive_callbacks;
-
-static int stat_mhd_access_callbacks;
-
-static int stat_mhd_read_callbacks;
-
-static int stat_mhd_close_callbacks;
-
-static int stat_connect_calls;
-
-/**
- * How many requests do we have currently pending
- * (with libcurl)?
- */
-static unsigned int http_requests_pending;
-
-static struct GNUNET_DISK_FileHandle signal_pipe[2];
-
-static char *proxy;
-
-/**
- * Daemon for listening for new connections.
- */
-static struct MHD_Daemon *mhd_daemon;
-
-/**
- * Curl multi for managing client operations.
- */
-static CURLM *curl_multi;
-
-/**
- * Set to GNUNET_YES while the transport is running.
- */
-static int http_running;
-
-/**
- * Thread running libcurl activities.
- */
-static struct GNUNET_ThreadHandle *curl_thread;
-
-/**
- * Array of currently active HTTP sessions.
- */
-static GNUNET_TSession **tsessions;
-
-/**
- * Number of valid entries in tsessions.
- */
-static unsigned int tsessionCount;
-
-/**
- * Sie of the tsessions array.
- */
-static unsigned int tsessionArrayLength;
-
-/**
- * Lock for concurrent access to all structures used
- * by http, including CURL.
- */
-static struct GNUNET_Mutex *lock;
-
-
-/**
- * Signal select thread that its selector
- * set may have changed.
- */
-static void
-signal_select ()
-{
- static char c;
- GNUNET_DISK_file_write (signal_pipe[1], &c, sizeof (c));
-}
-
-/**
- * Check if we are allowed to connect to the given IP.
- */
-static int
-acceptPolicyCallback (void *cls,
- const struct sockaddr *addr, socklen_t addr_len)
-{
- if (GNUNET_NO != is_rejected_tester (addr, addr_len))
- return MHD_NO;
- return MHD_YES;
-}
-
-/**
- * Disconnect from a remote node. May only be called
- * on sessions that were acquired by the caller first.
- * For the core, aquiration means to call associate or
- * connect. The number of disconnects must match the
- * number of calls to connect+associate.
+ * Function that can be used by the transport service to transmit
+ * a message using the plugin.
*
- * Sessions are actually discarded in cleanup_connections.
- *
- *
- * @param tsession the session that is closed
- * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
- */
-static int
-httpDisconnect (GNUNET_TSession * tsession)
-{
- HTTPSession *httpsession = tsession->internal;
- if (httpsession == NULL)
- {
- GNUNET_free (tsession);
- return GNUNET_OK;
- }
- GNUNET_mutex_lock (lock);
- httpsession->users--;
- GNUNET_mutex_unlock (lock);
- return GNUNET_OK;
-}
-
-static void
-destroy_tsession (GNUNET_TSession * tsession)
+ * @param cls closure
+ * @param target who should receive this message
+ * @param priority how important is the message
+ * @param msgbuf the message to transmit
+ * @param msgbuf_size number of bytes in 'msgbuf'
+ * @param timeout when should we time out
+ * @param session which session must be used (or NULL for "any")
+ * @param addr the address to use (can be NULL if the plugin
+ * is "on its own" (i.e. re-use existing TCP connection))
+ * @param addrlen length of the address in bytes
+ * @param force_address GNUNET_YES if the plugin MUST use the given address,
+ * otherwise the plugin may use other addresses or
+ * existing connections (if available)
+ * @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...)
+ * @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)
+ */
+static ssize_t
+http_plugin_send (void *cls,
+ const struct GNUNET_PeerIdentity *
+ target,
+ const char *msgbuf,
+ size_t msgbuf_size,
+ unsigned int priority,
+ struct GNUNET_TIME_Relative timeout,
+ struct Session *session,
+ const void *addr,
+ size_t addrlen,
+ int force_address,
+ GNUNET_TRANSPORT_TransmitContinuation
+ cont, void *cont_cls)
{
- HTTPSession *httpsession = tsession->internal;
- struct HTTPPutData *pos;
- struct HTTPPutData *next;
-#if DO_GET
- struct MHDGetData *gpos;
- struct MHDGetData *gnext;
-#endif
- struct MHD_Response *r;
- int i;
-
- GNUNET_mutex_lock (lock);
- for (i = 0; i < tsessionCount; i++)
- {
- if (tsessions[i] == tsession)
- {
- tsessions[i] = tsessions[--tsessionCount];
- break;
- }
- }
- if (httpsession->is_client)
- {
-#if DO_GET
- curl_multi_remove_handle (curl_multi, httpsession->cs.client.get);
- http_requests_pending--;
- signal_select ();
- curl_easy_cleanup (httpsession->cs.client.get);
- GNUNET_array_grow (httpsession->cs.client.rbuff2,
- httpsession->cs.client.rsize2, 0);
-#endif
- GNUNET_free_non_null (httpsession->cs.client.url);
- pos = httpsession->cs.client.puts;
- while (pos != NULL)
- {
- next = pos->next;
- curl_multi_remove_handle (curl_multi, pos->curl_put);
- http_requests_pending--;
- signal_select ();
- curl_easy_cleanup (pos->curl_put);
- GNUNET_free (pos->msg);
- GNUNET_free (pos);
- pos = next;
- }
- GNUNET_free (httpsession);
- GNUNET_free (tsession);
- }
- else
- {
- httpsession->destroyed = GNUNET_YES;
- GNUNET_GE_BREAK (NULL, httpsession->cs.server.puts == NULL);
-#if DO_GET
- gpos = httpsession->cs.server.gets;
- while (gpos != NULL)
- {
- GNUNET_array_grow (gpos->wbuff, gpos->wsize, 0);
- r = gpos->get;
- gpos->get = NULL;
- gnext = gpos->next;
- MHD_destroy_response (r);
- gpos = gnext;
- }
- httpsession->cs.server.gets = NULL;
-#endif
- GNUNET_free (httpsession->tsession);
- GNUNET_free (httpsession);
- }
- GNUNET_mutex_unlock (lock);
+ int bytes_sent = 0;
+ /* struct Plugin *plugin = cls; */
+ return bytes_sent;
}
-/**
- * MHD is done handling a request. Cleanup
- * the respective transport state.
- */
-static void
-requestCompletedCallback (void *unused,
- struct MHD_Connection *session,
- void **httpSessionCache)
-{
- HTTPSession *httpsession = *httpSessionCache;
- struct MHDPutData *pprev;
- struct MHDPutData *ppos;
-#if DO_GET
- struct MHDGetData *gprev;
- struct MHDGetData *gpos;
-#endif
- if (stats != NULL)
- stats->change (stat_mhd_close_callbacks, 1);
- if (httpsession == NULL)
- return; /* oops */
- GNUNET_GE_ASSERT (NULL, !httpsession->is_client);
- pprev = NULL;
- ppos = httpsession->cs.server.puts;
- while (ppos != NULL)
- {
- if (ppos->session == session)
- {
- ppos->last_activity = 0;
- signal_select ();
- return;
- }
- pprev = ppos;
- ppos = ppos->next;
- }
-#if DO_GET
- gprev = NULL;
- gpos = httpsession->cs.server.gets;
- while (gpos != NULL)
- {
- if (gpos->session == session)
- {
- gpos->last_get_activity = 0;
- signal_select ();
- return;
- }
- gprev = gpos;
- gpos = gpos->next;
- }
-#endif
- httpsession->is_mhd_active--;
-}
/**
- * A (core) Session is to be associated with a transport session. The
- * transport service may want to know in order to call back on the
- * core if the connection is being closed. Associate can also be
- * called to test if it would be possible to associate the session
- * later, in this case the argument session is NULL. This can be used
- * to test if the connection must be closed by the core or if the core
- * can assume that it is going to be self-managed (if associate
- * returns GNUNET_OK and session was NULL, the transport layer is responsible
- * for eventually freeing resources associated with the tesession). If
- * session is not NULL, the core takes responsbility for eventually
- * calling disconnect.
+ * Function that can be used to force the plugin to disconnect
+ * from the given peer and cancel all previous transmissions
+ * (and their continuationc).
*
- * @param tsession the session handle passed along
- * from the call to receive that was made by the transport
- * layer
- * @return GNUNET_OK if the session could be associated,
- * GNUNET_SYSERR if not.
+ * @param cls closure
+ * @param target peer from which to disconnect
*/
-static int
-httpAssociate (GNUNET_TSession * tsession)
+void
+http_plugin_disconnect (void *cls,
+ const struct GNUNET_PeerIdentity *target)
{
- HTTPSession *httpSession;
-
- if (tsession == NULL)
- {
- GNUNET_GE_BREAK (NULL, 0);
- return GNUNET_SYSERR;
- }
- httpSession = tsession->internal;
- GNUNET_mutex_lock (lock);
- if (httpSession->destroyed == GNUNET_YES)
- {
- GNUNET_mutex_unlock (lock);
- return GNUNET_SYSERR;
- }
- httpSession->users++;
- GNUNET_mutex_unlock (lock);
- return GNUNET_OK;
+ // struct Plugin *plugin = cls;
+ // FIXME
+ return;
}
-/**
- * Add a new session to the array watched by the select thread. Grows
- * the array if needed. If the caller wants to do anything useful
- * with the return value, it must have the lock before
- * calling. It is ok to call this function without holding lock if
- * the return value is ignored.
- */
-static unsigned int
-addTSession (GNUNET_TSession * tsession)
-{
- unsigned int i;
-
- GNUNET_mutex_lock (lock);
- if (tsessionCount == tsessionArrayLength)
- GNUNET_array_grow (tsessions, tsessionArrayLength,
- tsessionArrayLength * 2);
- i = tsessionCount;
- tsessions[tsessionCount++] = tsession;
- GNUNET_mutex_unlock (lock);
- return i;
-}
-#if DO_GET
/**
- * Callback for processing GET requests if our side is the
- * MHD HTTP server.
+ * Convert the transports address to a nice, human-readable
+ * format.
*
- * @param cls the HTTP session
- * @param pos read-offset in the stream
- * @param buf where to write the data
- * @param max how much data to write (at most)
- * @return number of bytes written, 0 is allowed!
- */
-static int
-contentReaderCallback (void *cls, uint64_t pos, char *buf, int max)
-{
- struct MHDGetData *mgd = cls;
-
- if (stats != NULL)
- stats->change (stat_mhd_read_callbacks, 1);
- GNUNET_mutex_lock (lock);
- if (mgd->wpos < max)
- max = mgd->wpos;
- memcpy (buf, &mgd->wbuff[mgd->woff], max);
- mgd->wpos -= max;
- mgd->woff += max;
- if (max > 0)
- mgd->last_get_activity = GNUNET_get_time ();
- if (mgd->wpos == 0)
- mgd->woff = 0;
- GNUNET_mutex_unlock (lock);
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP returns %u bytes in MHD's GET handler.\n", max);
-#endif
- if (stats != NULL)
- stats->change (stat_bytesSent, max);
- if ((max == 0) && (mgd->httpsession->cs.server.gets != mgd))
- return -1; /* end of response (another GET replaces this one) */
- return max;
-}
-#endif
-
-#if DO_GET
-/**
- * Notification that libmicrohttpd no longer needs the
- * response object.
+ * @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
*/
static void
-contentReaderFreeCallback (void *cls)
+http_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)
{
- struct MHDGetData *mgd = cls;
-
- GNUNET_GE_ASSERT (NULL, mgd->get == NULL);
- GNUNET_array_grow (mgd->wbuff, mgd->wsize, 0);
- GNUNET_free (mgd);
+ asc (asc_cls, NULL);
}
-#endif
-
-/**
- * Process GET or PUT request received via MHD. For
- * GET, queue response that will send back our pending
- * messages. For PUT, process incoming data and send
- * to GNUnet core. In either case, check if a session
- * already exists and create a new one if not.
- */
-static int
-accessHandlerCallback (void *cls,
- struct MHD_Connection *session,
- const char *url,
- const char *method,
- const char *version,
- const char *upload_data,
- size_t * upload_data_size, void **httpSessionCache)
-{
- GNUNET_TSession *tsession;
- struct MHDPutData *put;
- struct MHDGetData *get;
- HTTPSession *httpSession;
- struct MHD_Response *response;
- GNUNET_HashCode client;
- int i;
- unsigned int have;
- GNUNET_MessageHeader *hdr;
- GNUNET_TransportPacket *mp;
- unsigned int cpy;
- unsigned int poff;
-
- if (stats != NULL)
- stats->change (stat_mhd_access_callbacks, 1);
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD receives `%s' request.\n", method);
-#endif
- /* convert URL to sender peer id */
- if ((strlen (url) < 2)
- || (GNUNET_OK != GNUNET_enc_to_hash (&url[1], &client)))
- {
- /* invalid request */
- /* GNUNET_GE_BREAK_OP (NULL, 0); -- this happens a lot, most likely
- somebody scanning for MyDoom.X-opened backdoors */
- return MHD_NO;
- }
- /* check if we already have a session for this */
- httpSession = *httpSessionCache;
- if (httpSession == NULL)
- {
- /* new http connection */
- if (stats != NULL)
- {
- if (0 == strcasecmp (MHD_HTTP_METHOD_PUT, method))
- stats->change (stat_put_received, 1);
- else
- stats->change (stat_get_received, 1);
- }
- GNUNET_mutex_lock (lock);
- for (i = 0; i < tsessionCount; i++)
- {
- tsession = tsessions[i];
- httpSession = tsession->internal;
- if ((0 ==
- memcmp (&httpSession->sender, &client,
- sizeof (GNUNET_HashCode)))
- && (httpSession->is_client == GNUNET_NO))
- break;
- tsession = NULL;
- httpSession = NULL;
- }
- GNUNET_mutex_unlock (lock);
- }
- /* create new session if necessary */
- if (httpSession == NULL)
- {
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD creates new session for request from `%s'.\n",
- &url[1]);
-#endif
- httpSession = GNUNET_malloc (sizeof (HTTPSession));
- memset (httpSession, 0, sizeof (HTTPSession));
- httpSession->sender.hashPubKey = client;
- httpSession->users = 0; /* MHD */
- tsession = GNUNET_malloc (sizeof (GNUNET_TSession));
- memset (tsession, 0, sizeof (GNUNET_TSession));
- tsession->ttype = GNUNET_TRANSPORT_PROTOCOL_NUMBER_HTTP;
- tsession->internal = httpSession;
- tsession->peer.hashPubKey = client;
- httpSession->tsession = tsession;
- addTSession (tsession);
- }
- if (*httpSessionCache == NULL)
- {
- httpSession->is_mhd_active++;
- *httpSessionCache = httpSession;
- }
- GNUNET_mutex_lock (lock);
-#if DO_GET
- if (0 == strcasecmp (MHD_HTTP_METHOD_GET, method))
- {
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD receives GET request from `%s'.\n", &url[1]);
-#endif
- /* handle get; create response object if we do not
- have one already */
- get = GNUNET_malloc (sizeof (struct MHDGetData));
- memset (get, 0, sizeof (struct MHDGetData));
- get->next = httpSession->cs.server.gets;
- httpSession->cs.server.gets = get;
- get->session = session;
- get->httpsession = httpSession;
- get->last_get_activity = GNUNET_get_time ();
- get->get = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
- 64 * 1024,
- contentReaderCallback,
- get,
- contentReaderFreeCallback);
- MHD_queue_response (session, MHD_HTTP_OK, get->get);
- GNUNET_mutex_unlock (lock);
- return MHD_YES;
- }
-#endif
- if (0 == strcasecmp (MHD_HTTP_METHOD_PUT, method))
- {
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD receives PUT request from `%s' with %u bytes.\n",
- &url[1], *upload_data_size);
-#endif
- put = httpSession->cs.server.puts;
- while ((put != NULL) && (put->session != session))
- put = put->next;
- if (put == NULL)
- {
- put = GNUNET_malloc (sizeof (struct MHDPutData));
- memset (put, 0, sizeof (struct MHDPutData));
- put->next = httpSession->cs.server.puts;
- httpSession->cs.server.puts = put;
- put->session = session;
- }
- put->last_activity = GNUNET_get_time ();
- /* handle put (upload_data!) */
- poff = 0;
- have = *upload_data_size;
- if (stats != NULL)
- stats->change (stat_bytesReceived, have);
- *upload_data_size = 0; /* we will always process everything */
- if ((have == 0) && (put->done == GNUNET_NO)
- && (put->ready == GNUNET_YES))
- {
- put->done = GNUNET_YES;
- /* end of upload, send response! */
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD queues dummy response to completed PUT request.\n");
-#endif
- response =
- MHD_create_response_from_data (strlen (HTTP_PUT_RESPONSE),
- HTTP_PUT_RESPONSE, MHD_NO, MHD_NO);
- MHD_queue_response (session, MHD_HTTP_OK, response);
- MHD_destroy_response (response);
- GNUNET_mutex_unlock (lock);
- return MHD_YES;
- }
- while (have > 0)
- {
- put->ready = GNUNET_NO;
- if (put->rpos1 < sizeof (GNUNET_MessageHeader))
- {
- cpy = sizeof (GNUNET_MessageHeader) - put->rpos1;
- if (cpy > have)
- cpy = have;
- memcpy (&put->rbuff1[put->rpos1], &upload_data[poff], cpy);
- put->rpos1 += cpy;
- have -= cpy;
- poff += cpy;
- put->rpos2 = 0;
- }
- if (put->rpos1 < sizeof (GNUNET_MessageHeader))
- break;
- hdr = (GNUNET_MessageHeader *) put->rbuff1;
- GNUNET_array_grow (put->rbuff2,
- put->rsize2,
- ntohs (hdr->size) -
- sizeof (GNUNET_MessageHeader));
- if (put->rpos2 < ntohs (hdr->size) - sizeof (GNUNET_MessageHeader))
- {
- cpy =
- ntohs (hdr->size) - sizeof (GNUNET_MessageHeader) -
- put->rpos2;
- if (cpy > have)
- cpy = have;
- memcpy (&put->rbuff2[put->rpos2], &upload_data[poff], cpy);
- have -= cpy;
- poff += cpy;
- put->rpos2 += cpy;
- }
- if (put->rpos2 < ntohs (hdr->size) - sizeof (GNUNET_MessageHeader))
- break;
- mp = GNUNET_malloc (sizeof (GNUNET_TransportPacket));
- mp->msg = put->rbuff2;
- mp->sender = httpSession->sender;
- mp->tsession = httpSession->tsession;
- mp->size = ntohs (hdr->size) - sizeof (GNUNET_MessageHeader);
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD passes %u bytes to core (received via PUT request).\n",
- mp->size);
-#endif
- coreAPI->receive (mp);
- put->rbuff2 = NULL;
- put->rpos2 = 0;
- put->rsize2 = 0;
- put->rpos1 = 0;
- put->ready = GNUNET_YES;
- }
- GNUNET_mutex_unlock (lock);
- return MHD_YES;
- }
- GNUNET_mutex_unlock (lock);
- GNUNET_GE_BREAK_OP (NULL, 0); /* invalid request */
- return MHD_NO;
-}
-
-#if DO_GET
/**
- * Process downloaded bits (from GET via CURL).
- */
-static size_t
-receiveContentCallback (void *ptr, size_t size, size_t nmemb, void *ctx)
-{
- HTTPSession *httpSession = ctx;
- const char *inbuf = ptr;
- size_t have = size * nmemb;
- size_t poff = 0;
- size_t cpy;
- GNUNET_MessageHeader *hdr;
- GNUNET_TransportPacket *mp;
-
- if (stats != NULL)
- stats->change (stat_curl_receive_callbacks, 1);
- httpSession->cs.client.last_get_activity = GNUNET_get_time ();
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/CURL receives %u bytes as response to GET.\n",
- size * nmemb);
-#endif
- while (have > 0)
- {
- if (httpSession->cs.client.rpos1 < sizeof (GNUNET_MessageHeader))
- {
- cpy = sizeof (GNUNET_MessageHeader) - httpSession->cs.client.rpos1;
- if (cpy > have)
- cpy = have;
- memcpy (&httpSession->cs.
- client.rbuff1[httpSession->cs.client.rpos1], &inbuf[poff],
- cpy);
- httpSession->cs.client.rpos1 += cpy;
- have -= cpy;
- poff += cpy;
- httpSession->cs.client.rpos2 = 0;
- }
- if (httpSession->cs.client.rpos1 < sizeof (GNUNET_MessageHeader))
- break;
- hdr = (GNUNET_MessageHeader *) httpSession->cs.client.rbuff1;
- GNUNET_array_grow (httpSession->cs.client.rbuff2,
- httpSession->cs.client.rsize2,
- ntohs (hdr->size) - sizeof (GNUNET_MessageHeader));
- if (httpSession->cs.client.rpos2 <
- ntohs (hdr->size) - sizeof (GNUNET_MessageHeader))
- {
- cpy =
- ntohs (hdr->size) - sizeof (GNUNET_MessageHeader) -
- httpSession->cs.client.rpos2;
- if (cpy > have)
- cpy = have;
- memcpy (&httpSession->cs.
- client.rbuff2[httpSession->cs.client.rpos2], &inbuf[poff],
- cpy);
- have -= cpy;
- poff += cpy;
- httpSession->cs.client.rpos2 += cpy;
- }
- if (httpSession->cs.client.rpos2 <
- ntohs (hdr->size) - sizeof (GNUNET_MessageHeader))
- break;
- mp = GNUNET_malloc (sizeof (GNUNET_TransportPacket));
- mp->msg = httpSession->cs.client.rbuff2;
- mp->sender = httpSession->sender;
- mp->tsession = httpSession->tsession;
- mp->size = ntohs (hdr->size) - sizeof (GNUNET_MessageHeader);
- coreAPI->receive (mp);
- httpSession->cs.client.rbuff2 = NULL;
- httpSession->cs.client.rpos2 = 0;
- httpSession->cs.client.rsize2 = 0;
- httpSession->cs.client.rpos1 = 0;
- }
- if (stats != NULL)
- stats->change (stat_bytesReceived, size * nmemb);
- return size * nmemb;
-}
-#endif
-
-/**
- * Provide bits for upload: we're using CURL for a PUT request
- * and now need to provide data from the message we are transmitting.
- */
-static size_t
-sendContentCallback (void *ptr, size_t size, size_t nmemb, void *ctx)
-{
- struct HTTPPutData *put = ctx;
- size_t max = size * nmemb;
-
- if (stats != NULL)
- stats->change (stat_curl_send_callbacks, 1);
- put->last_activity = GNUNET_get_time ();
- if (max > put->size - put->pos)
- max = put->size - put->pos;
- memcpy (ptr, &put->msg[put->pos], max);
- put->pos += max;
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/CURL sends %u bytes in PUT request.\n", max);
-#endif
- if (stats != NULL)
- stats->change (stat_bytesSent, max);
- return max;
-}
-
-#define CURL_EASY_SETOPT(c, a, b) do { ret = curl_easy_setopt(c, a, b); if (ret != CURLE_OK) GNUNET_GE_LOG(coreAPI->ectx, GNUNET_GE_WARNING | GNUNET_GE_USER | GNUNET_GE_BULK, _("%s failed at %s:%d: `%s'\n"), "curl_easy_setopt", __FILE__, __LINE__, curl_easy_strerror(ret)); } while (0);
-#define IP_BUF_LEN 128
-
-static void
-create_session_url (HTTPSession * httpSession)
-{
- char buf[IP_BUF_LEN];
- char *url;
- GNUNET_EncName enc;
- unsigned short available;
- const char *obr;
- const char *cbr;
- const HostAddress *haddr =
- (const HostAddress *) &httpSession->cs.client.address;
-
- url = httpSession->cs.client.url;
- if (url == NULL)
- {
- GNUNET_hash_to_enc (&coreAPI->my_identity->hashPubKey, &enc);
- available = ntohs (haddr->availability) & available_protocols;
- if (available == (VERSION_AVAILABLE_IPV4 | VERSION_AVAILABLE_IPV6))
- {
- if (GNUNET_random_u32 (GNUNET_RANDOM_QUALITY_WEAK, 2) == 0)
- available = VERSION_AVAILABLE_IPV4;
- else
- available = VERSION_AVAILABLE_IPV6;
- }
- if ((available & VERSION_AVAILABLE_IPV4) > 0)
- {
- if (NULL == inet_ntop (AF_INET, &haddr->ipv4, buf, IP_BUF_LEN))
- {
- /* log? */
- return;
- }
- obr = "";
- cbr = "";
- }
- else if ((available & VERSION_AVAILABLE_IPV6) > 0)
- {
- if (NULL == inet_ntop (AF_INET6, &haddr->ipv6, buf, IP_BUF_LEN))
- {
- /* log? */
- return;
- }
- obr = "[";
- cbr = "]";
- }
- else
- return; /* error */
- url = GNUNET_malloc (64 + sizeof (GNUNET_EncName) + strlen (buf));
- GNUNET_snprintf (url,
- 64 + sizeof (GNUNET_EncName),
- "http://%s%s%s:%u/%s", obr, buf, cbr,
- ntohs (haddr->port), &enc);
- httpSession->cs.client.url = url;
- }
-}
-
-#if DO_GET
-/**
- * Try to do a GET on the other peer of the given
- * http session.
+ * 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.
*
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @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
*/
static int
-create_curl_get (HTTPSession * httpSession)
+http_plugin_address_suggested (void *cls,
+ void *addr, size_t addrlen)
{
- CURL *curl_get;
- CURLcode ret;
- CURLMcode mret;
- GNUNET_CronTime now;
+ /* struct Plugin *plugin = cls; */
- if (httpSession->cs.client.url == NULL)
- return GNUNET_SYSERR;
- curl_get = httpSession->cs.client.get;
- if (curl_get != NULL)
- {
- GNUNET_mutex_lock (lock);
- curl_multi_remove_handle (curl_multi, curl_get);
- http_requests_pending--;
- signal_select ();
- curl_easy_cleanup (curl_get);
- GNUNET_mutex_unlock (lock);
- httpSession->cs.client.get = NULL;
- }
- curl_get = curl_easy_init ();
- if (curl_get == NULL)
- return GNUNET_SYSERR;
- /* create GET */
- CURL_EASY_SETOPT (curl_get, CURLOPT_FAILONERROR, 1);
- CURL_EASY_SETOPT (curl_get, CURLOPT_URL, httpSession->cs.client.url);
- if (strlen (proxy) > 0)
- CURL_EASY_SETOPT (curl_get, CURLOPT_PROXY, proxy);
- CURL_EASY_SETOPT (curl_get, CURLOPT_BUFFERSIZE, 32 * 1024);
- if (0 == strncmp (httpSession->cs.client.url, "http", 4))
- CURL_EASY_SETOPT (curl_get, CURLOPT_USERAGENT, "GNUnet-http");
-#if 0
- CURL_EASY_SETOPT (curl_get, CURLOPT_VERBOSE, 1);
-#endif
- CURL_EASY_SETOPT (curl_get, CURLOPT_CONNECTTIMEOUT, 150L);
- /* NOTE: use of CONNECTTIMEOUT without also
- setting NOSIGNAL results in really weird
- crashes on my system! */
- CURL_EASY_SETOPT (curl_get, CURLOPT_NOSIGNAL, 1);
- CURL_EASY_SETOPT (curl_get, CURLOPT_TIMEOUT, 150L);
- CURL_EASY_SETOPT (curl_get, CURLOPT_WRITEFUNCTION, &receiveContentCallback);
- CURL_EASY_SETOPT (curl_get, CURLOPT_WRITEDATA, httpSession);
- CURL_EASY_SETOPT (curl_get, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
- if (ret != CURLE_OK)
- {
- curl_easy_cleanup (curl_get);
- return GNUNET_SYSERR;
- }
- GNUNET_mutex_lock (lock);
- mret = curl_multi_add_handle (curl_multi, curl_get);
- http_requests_pending++;
- GNUNET_mutex_unlock (lock);
- if (stats != NULL)
- stats->change (stat_get_issued, 1);
- if (mret != CURLM_OK)
- {
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_ADMIN | GNUNET_GE_USER |
- GNUNET_GE_BULK, _("%s failed at %s:%d: `%s'\n"),
- "curl_multi_add_handle", __FILE__, __LINE__,
- curl_multi_strerror (mret));
- curl_easy_cleanup (curl_get);
- return GNUNET_SYSERR;
- }
- signal_select ();
- now = GNUNET_get_time ();
- httpSession->cs.client.last_get_activity = now;
- httpSession->cs.client.get = curl_get;
- httpSession->cs.client.last_get_initiated = now;
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/CURL initiated GET request.\n");
-#endif
+ /* check if the address is plausible; if so,
+ add it to our list! */
return GNUNET_OK;
}
-#endif
-/**
- * Establish a connection to a remote node.
- *
- * @param hello the hello-Message for the target node
- * @param tsessionPtr the session handle that is set
- * @param may_reuse are we allowed to re-use an existing connection?
- * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
- */
-static int
-httpConnect (const GNUNET_MessageHello * hello,
- GNUNET_TSession ** tsessionPtr, int may_reuse)
-{
- const HostAddress *haddr = (const HostAddress *) &hello[1];
- GNUNET_TSession *tsession;
- HTTPSession *httpSession;
- int i;
-
- if (stats != NULL)
- stats->change (stat_connect_calls, 1);
- /* check if we have a session pending for this peer */
- tsession = NULL;
- if (may_reuse)
- {
- GNUNET_mutex_lock (lock);
- for (i = 0; i < tsessionCount; i++)
- {
- if (0 == memcmp (&hello->senderIdentity,
- &tsessions[i]->peer, sizeof (GNUNET_PeerIdentity)))
- {
- tsession = tsessions[i];
- break;
- }
- }
- if ((tsession != NULL) && (GNUNET_OK == httpAssociate (tsession)))
- {
- *tsessionPtr = tsession;
- GNUNET_mutex_unlock (lock);
- return GNUNET_OK;
- }
- GNUNET_mutex_unlock (lock);
- }
- /* no session pending, initiate a new one! */
- httpSession = GNUNET_malloc (sizeof (HTTPSession));
- memset (httpSession, 0, sizeof (HTTPSession));
- httpSession->sender = hello->senderIdentity;
- httpSession->users = 1; /* us only, core has not seen this tsession! */
- httpSession->is_client = GNUNET_YES;
- httpSession->cs.client.address = *haddr;
- tsession = GNUNET_malloc (sizeof (GNUNET_TSession));
- memset (tsession, 0, sizeof (GNUNET_TSession));
- httpSession->tsession = tsession;
- tsession->ttype = GNUNET_TRANSPORT_PROTOCOL_NUMBER_HTTP;
- tsession->internal = httpSession;
- tsession->peer = hello->senderIdentity;
- create_session_url (httpSession);
-#if DO_GET
- if (GNUNET_OK != create_curl_get (httpSession))
- {
- GNUNET_free (tsession);
- GNUNET_free (httpSession);
- return GNUNET_SYSERR;
- }
-#endif
- /* PUTs will be created as needed */
- addTSession (tsession);
- *tsessionPtr = tsession;
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/CURL initiated connection to `%s'.\n",
- httpSession->cs.client.url);
-#endif
- return GNUNET_OK;
-}
-
-/**
- * We received the "Thank you!" response to a PUT.
- * Discard the data (not useful) and mark the PUT
- * operation as completed.
- */
-static size_t
-discardContentCallback (void *data, size_t size, size_t nmemb, void *put_cls)
-{
- struct HTTPPutData *put = put_cls;
- /* this condition should pretty much always be
- true; just checking here in case the PUT
- response comes early somehow */
- if (put->pos == put->size)
- put->done = GNUNET_YES;
- return size * nmemb;
-}
/**
- * Create a new PUT request for the given PUT data.
+ * Entry point for the plugin.
*/
-static int
-create_curl_put (HTTPSession * httpSession, struct HTTPPutData *put)
+void *
+libgnunet_plugin_transport_http_init (void *cls)
{
- CURL *curl_put;
- CURLcode ret;
- CURLMcode mret;
- long size;
-
- /* we should have initiated a GET earlier,
- so URL must not be NULL here */
- if (httpSession->cs.client.url == NULL)
- return GNUNET_SYSERR;
- curl_put = curl_easy_init ();
- if (curl_put == NULL)
- return GNUNET_SYSERR;
- CURL_EASY_SETOPT (curl_put, CURLOPT_FAILONERROR, 1);
- CURL_EASY_SETOPT (curl_put, CURLOPT_URL, httpSession->cs.client.url);
- if (strlen (proxy) > 0)
- CURL_EASY_SETOPT (curl_put, CURLOPT_PROXY, proxy);
- CURL_EASY_SETOPT (curl_put, CURLOPT_BUFFERSIZE, put->size);
- if (0 == strncmp (httpSession->cs.client.url, "http", 4))
- CURL_EASY_SETOPT (curl_put, CURLOPT_USERAGENT, "GNUnet-http");
- CURL_EASY_SETOPT (curl_put, CURLOPT_UPLOAD, 1);
-#if 0
- CURL_EASY_SETOPT (curl_put, CURLOPT_VERBOSE, 1);
-#endif
- CURL_EASY_SETOPT (curl_put, CURLOPT_CONNECTTIMEOUT, 150L);
- /* NOTE: use of CONNECTTIMEOUT without also
- setting NOSIGNAL results in really weird
- crashes on my system! */
- CURL_EASY_SETOPT (curl_put, CURLOPT_NOSIGNAL, 1);
- CURL_EASY_SETOPT (curl_put, CURLOPT_TIMEOUT, 150L);
- size = put->size;
- CURL_EASY_SETOPT (curl_put, CURLOPT_INFILESIZE, size);
- CURL_EASY_SETOPT (curl_put, CURLOPT_READFUNCTION, &sendContentCallback);
- CURL_EASY_SETOPT (curl_put, CURLOPT_READDATA, put);
- CURL_EASY_SETOPT (curl_put, CURLOPT_WRITEFUNCTION, &discardContentCallback);
- CURL_EASY_SETOPT (curl_put, CURLOPT_WRITEDATA, put);
- CURL_EASY_SETOPT (curl_put, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
- if (ret != CURLE_OK)
- {
- curl_easy_cleanup (curl_put);
- return GNUNET_SYSERR;
- }
- GNUNET_mutex_lock (lock);
- mret = curl_multi_add_handle (curl_multi, curl_put);
- http_requests_pending++;
- GNUNET_mutex_unlock (lock);
- if (stats != NULL)
- stats->change (stat_put_issued, 1);
- if (mret != CURLM_OK)
- {
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_ADMIN | GNUNET_GE_USER |
- GNUNET_GE_BULK, _("%s failed at %s:%d: `%s'\n"),
- "curl_multi_add_handle", __FILE__, __LINE__,
- curl_multi_strerror (mret));
- return GNUNET_SYSERR;
- }
- signal_select ();
- put->curl_put = curl_put;
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/CURL initiated PUT request to `%s'.\n",
- httpSession->cs.client.url);
-#endif
- return GNUNET_OK;
+ struct GNUNET_TRANSPORT_PluginEnvironment *env = cls;
+ struct GNUNET_TRANSPORT_PluginFunctions *api;
+ struct Plugin *plugin;
+
+ plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin->env = env;
+ plugin->statistics = NULL;
+ api = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PluginFunctions));
+ api->cls = plugin;
+ api->send = &http_plugin_send;
+ api->disconnect = &http_plugin_disconnect;
+ api->address_pretty_printer = &http_plugin_address_pretty_printer;
+ api->check_address = &http_plugin_address_suggested;
+ return api;
}
/**
- * Test if the transport would even try to send
- * a message of the given size and importance
- * for the given session.<br>
- * This function is used to check if the core should
- * even bother to construct (and encrypt) this kind
- * of message.
- *
- * @return GNUNET_YES if the transport would try (i.e. queue
- * the message or call the OS to send),
- * GNUNET_NO if the transport would just drop the message,
- * GNUNET_SYSERR if the size/session is invalid
- */
-static int
-httpTestWouldTry (GNUNET_TSession * tsession, const unsigned int size,
- int important)
-{
- HTTPSession *httpSession = tsession->internal;
- struct MHDGetData *get;
- int ret;
-
- if (size >= GNUNET_MAX_BUFFER_SIZE - sizeof (GNUNET_MessageHeader))
- {
- GNUNET_GE_BREAK (coreAPI->ectx, 0);
- return GNUNET_SYSERR;
- }
- if (size == 0)
- {
- GNUNET_GE_BREAK (coreAPI->ectx, 0);
- return GNUNET_SYSERR;
- }
- if (httpSession->is_client)
- {
- /* client */
- if ((important != GNUNET_YES) && (httpSession->cs.client.puts != NULL))
- return GNUNET_NO;
- return GNUNET_YES;
- }
- else
- {
- /* server */
- GNUNET_mutex_lock (lock);
- get = httpSession->cs.server.gets;
- if (get == NULL)
- ret = GNUNET_NO;
- else
- {
- if (get->wsize == 0)
- ret = GNUNET_YES;
- else if ((get->wpos + size > get->wsize)
- && (important != GNUNET_YES))
- ret = GNUNET_NO;
- else
- ret = GNUNET_YES;
- }
- GNUNET_mutex_unlock (lock);
- return ret;
- }
-}
-
-
-/**
- * Send a message to the specified remote node.
- *
- * @param tsession the GNUNET_MessageHello identifying the remote node
- * @param msg the message
- * @param size the size of the message
- * @param important is this message so important that usual restrictions do not apply?
- * @return GNUNET_SYSERR on error, GNUNET_OK on success, GNUNET_NO if queue is full
- */
-static int
-httpSend (GNUNET_TSession * tsession,
- const void *msg, unsigned int size, int important)
-{
- HTTPSession *httpSession = tsession->internal;
- struct HTTPPutData *putData;
- GNUNET_MessageHeader *hdr;
-#if DO_GET
- struct MHDGetData *getData;
- char *tmp;
-#endif
-
- if (stats != NULL)
- stats->change (stat_send_calls, 1);
- if (httpSession->is_client)
- {
- /* we need to do a PUT (we are the client) */
- if (size >= GNUNET_MAX_BUFFER_SIZE)
- return GNUNET_SYSERR;
- if (size == 0)
- {
- GNUNET_GE_BREAK (NULL, 0);
- return GNUNET_SYSERR;
- }
- if (important != GNUNET_YES)
- {
- GNUNET_mutex_lock (lock);
- if (httpSession->cs.client.puts != NULL)
- {
- /* do not queue more than one unimportant PUT at a time */
- signal_select (); /* do clean up now! */
- GNUNET_mutex_unlock (lock);
- if (stats != NULL)
- stats->change (stat_bytesDropped, size);
-
- return GNUNET_NO;
- }
- GNUNET_mutex_unlock (lock);
- }
- putData = GNUNET_malloc (sizeof (struct HTTPPutData));
- memset (putData, 0, sizeof (struct HTTPPutData));
- putData->msg = GNUNET_malloc (size + sizeof (GNUNET_MessageHeader));
- hdr = (GNUNET_MessageHeader *) putData->msg;
- hdr->size = htons (size + sizeof (GNUNET_MessageHeader));
- hdr->type = htons (0);
- memcpy (&putData->msg[sizeof (GNUNET_MessageHeader)], msg, size);
- putData->size = size + sizeof (GNUNET_MessageHeader);
- putData->last_activity = GNUNET_get_time ();
- if (GNUNET_OK != create_curl_put (httpSession, putData))
- {
- GNUNET_free (putData->msg);
- GNUNET_free (putData);
- return GNUNET_SYSERR;
- }
- GNUNET_mutex_lock (lock);
- putData->next = httpSession->cs.client.puts;
- httpSession->cs.client.puts = putData;
- GNUNET_mutex_unlock (lock);
- return GNUNET_OK;
- }
-
- /* httpSession->isClient == false, respond to a GET (we
- hopefully have one or will have one soon) */
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP/MHD queues %u bytes to be sent as response to GET as soon as possible.\n",
- size);
-#endif
-#if DO_GET
- GNUNET_mutex_lock (lock);
- getData = httpSession->cs.server.gets;
- if (getData == NULL)
- {
- GNUNET_mutex_unlock (lock);
- return GNUNET_SYSERR;
- }
- if (getData->wsize == 0)
- GNUNET_array_grow (getData->wbuff, getData->wsize, HTTP_BUF_SIZE);
- size += sizeof (GNUNET_MessageHeader);
- if (getData->wpos + size > getData->wsize)
- {
- /* need to grow or discard */
- if (!important)
- {
- GNUNET_mutex_unlock (lock);
- return GNUNET_NO;
- }
- tmp = GNUNET_malloc (getData->wpos + size);
- memcpy (tmp, &getData->wbuff[getData->woff], getData->wpos);
- hdr = (GNUNET_MessageHeader *) & tmp[getData->wpos];
- hdr->type = htons (0);
- hdr->size = htons (size);
- memcpy (&hdr[1], msg, size - sizeof (GNUNET_MessageHeader));
- GNUNET_free (getData->wbuff);
- getData->wbuff = tmp;
- getData->wsize = getData->wpos + size;
- getData->woff = 0;
- getData->wpos = getData->wpos + size;
- }
- else
- {
- /* fits without growing */
- if (getData->wpos + getData->woff + size > getData->wsize)
- {
- /* need to compact first */
- memmove (getData->wbuff,
- &getData->wbuff[getData->woff], getData->wpos);
- getData->woff = 0;
- }
- /* append */
- hdr =
- (GNUNET_MessageHeader *) & getData->wbuff[getData->woff +
- getData->wpos];
- hdr->size = htons (size);
- hdr->type = htons (0);
- memcpy (&hdr[1], msg, size - sizeof (GNUNET_MessageHeader));
- getData->wpos += size;
- }
- signal_select ();
- GNUNET_mutex_unlock (lock);
-#endif
- return GNUNET_OK;
-}
-
-/**
- * Function called to cleanup dead connections
- * (completed PUTs, GETs that have timed out,
- * etc.). Also re-vives GETs that have timed out
- * if we are still interested in the connection.
- */
-static void
-cleanup_connections ()
-{
- int i;
- HTTPSession *s;
- struct HTTPPutData *prev;
- struct HTTPPutData *pos;
- struct MHDPutData *mpos;
- struct MHDPutData *mprev;
-#if DO_GET
- struct MHD_Response *r;
- struct MHDGetData *gpos;
- struct MHDGetData *gnext;
-#endif
- GNUNET_CronTime now;
-
- GNUNET_mutex_lock (lock);
- now = GNUNET_get_time ();
- for (i = 0; i < tsessionCount; i++)
- {
- s = tsessions[i]->internal;
- if (s->is_client)
- {
- if ((s->cs.client.puts == NULL) && (s->users == 0)
-#if DO_GET
- && (s->cs.client.last_get_activity + HTTP_TIMEOUT < now)
-#endif
- )
- {
-#if DO_GET
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST |
- GNUNET_GE_USER,
- "HTTP transport destroys old (%llu ms) unused client session\n",
- now - s->cs.client.last_get_activity);
-#endif
-#endif
- destroy_tsession (tsessions[i]);
- i--;
- continue;
- }
-
- prev = NULL;
- pos = s->cs.client.puts;
- while (pos != NULL)
- {
- if (pos->last_activity + HTTP_TIMEOUT < now)
- pos->done = GNUNET_YES;
- if (pos->done)
- {
- if (prev == NULL)
- s->cs.client.puts = pos->next;
- else
- prev->next = pos->next;
- GNUNET_free (pos->msg);
- curl_multi_remove_handle (curl_multi, pos->curl_put);
- http_requests_pending--;
- signal_select ();
- curl_easy_cleanup (pos->curl_put);
- GNUNET_free (pos);
- if (prev == NULL)
- pos = s->cs.client.puts;
- else
- pos = prev->next;
- continue;
- }
- prev = pos;
- pos = pos->next;
- }
-#if DO_GET
- if ((s->cs.client.last_get_activity + HTTP_TIMEOUT < now) &&
- ((s->users > 0) || (s->cs.client.puts != NULL)) &&
- ((s->cs.client.last_get_initiated + HTTP_GET_REFRESH > now) ||
- (s->cs.client.get == NULL)) &&
- ((s->cs.client.get == NULL) ||
- (s->cs.client.last_get_activity + HTTP_GET_REFRESH / 2 < now)))
- create_curl_get (s);
-#endif
- }
- else
- {
- mpos = s->cs.server.puts;
- mprev = NULL;
- while (mpos != NULL)
- {
- if (mpos->last_activity == 0)
- {
- if (mprev == NULL)
- s->cs.server.puts = mpos->next;
- else
- mprev->next = mpos->next;
- GNUNET_array_grow (mpos->rbuff2, mpos->rsize2, 0);
- GNUNET_free (mpos);
- if (mprev == NULL)
- mpos = s->cs.server.puts;
- else
- mpos = mprev->next;
- continue;
- }
- mprev = mpos;
- mpos = mpos->next;
- }
-
- /* ! s->is_client */
-#if DO_GET
- gpos = s->cs.server.gets;
- while (gpos != NULL)
- {
- gnext = gpos->next;
- gpos->next = NULL;
- if ((gpos->last_get_activity + HTTP_TIMEOUT < now) ||
- (gpos != s->cs.server.gets))
- {
- if (gpos == s->cs.server.gets)
- s->cs.server.gets = NULL;
- r = gpos->get;
- gpos->get = NULL;
- MHD_destroy_response (r);
- }
- gpos = gnext;
- }
-#endif
- if (
-#if DO_GET
- (s->cs.server.gets == NULL) &&
-#endif
- (s->is_mhd_active == 0) && (s->users == 0))
- {
-#if DO_GET
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST |
- GNUNET_GE_USER,
- "HTTP transport destroys unused server session\n");
-#endif
-#endif
- destroy_tsession (tsessions[i]);
- i--;
- continue;
- }
- }
- }
- GNUNET_mutex_unlock (lock);
-}
-
-/**
- * Thread that runs the CURL and MHD requests.
+ * Exit point from the plugin.
*/
-static void *
-curl_runner (void *unused)
+void *
+libgnunet_plugin_transport_http_done (void *cls)
{
- CURLMcode mret;
- fd_set rs;
- fd_set ws;
- fd_set es;
- struct GNUNET_NETWORK_FDSet *hrs;
- struct GNUNET_NETWORK_FDSet *hws;
- struct GNUNET_NETWORK_FDSet *hes;
- int max;
- int running;
- unsigned long long timeout;
- long ms;
- int have_tv;
- char buf[128]; /* for reading from pipe */
- int ret;
-
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP transport select thread started\n");
-#endif
-
- hrs = GNUNET_net_fdset_create ();
- hws = GNUNET_net_fdset_create ();
- hes = GNUNET_net_fdset_create ();
-
- while (GNUNET_YES == http_running)
- {
- max = 0;
- FD_ZERO (&rs);
- FD_ZERO (&ws);
- FD_ZERO (&es);
- GNUNET_mutex_lock (lock);
- mret = curl_multi_fdset (curl_multi, &rs, &ws, &es, &max);
- GNUNET_mutex_unlock (lock);
- if (mret != CURLM_OK)
- {
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_ADMIN | GNUNET_GE_USER |
- GNUNET_GE_BULK, _("%s failed at %s:%d: `%s'\n"),
- "curl_multi_fdset", __FILE__, __LINE__,
- curl_multi_strerror (mret));
- break;
- }
- if (mhd_daemon != NULL)
- MHD_get_fdset (mhd_daemon, &rs, &ws, &es, &max);
- timeout = 0;
- have_tv = MHD_NO;
- if (mhd_daemon != NULL)
- have_tv = MHD_get_timeout (mhd_daemon, &timeout);
- GNUNET_mutex_lock (lock);
- if ((CURLM_OK == curl_multi_timeout (curl_multi, &ms)) &&
- (ms != -1) && ((ms < timeout) || (have_tv == MHD_NO)))
- {
- timeout = ms;
- have_tv = MHD_YES;
- }
- GNUNET_mutex_unlock (lock);
-
- GNUNET_net_fdset_zero (hws);
- GNUNET_net_fdset_zero (hrs);
- GNUNET_net_fdset_zero (hes);
- GNUNET_net_fdset_copy_native (hws, ws);
- GNUNET_net_fdset_copy_native (hrs, rs);
- GNUNET_net_fdset_copy_native (hes, es);
+ struct GNUNET_TRANSPORT_PluginFunctions *api = cls;
+ struct Plugin *plugin = api->cls;
- GNUNET_net_fdset_handle_set (signal_pipe[0], hrs);
- if (stats != NULL)
- stats->change (stat_select_calls, 1);
- ret =
- GNUNET_net_select (hrs, hws, hes,
- (have_tv ==
- MHD_YES) ? timeout :
- GNUNET_TIME_UNIT_FOREVER_REL);
- if (ret == GNUNET_SYSERR)
- {
- GNUNET_GE_LOG_STRERROR (coreAPI->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_ADMIN |
- GNUNET_GE_DEVELOPER, "select");
- }
- if (GNUNET_YES != http_running)
- break;
- running = 0;
- do
- {
- GNUNET_mutex_lock (lock);
- mret = curl_multi_perform (curl_multi, &running);
- GNUNET_mutex_unlock (lock);
- }
- while ((mret == CURLM_CALL_MULTI_PERFORM)
- && (http_running == GNUNET_YES));
- if (GNUNET_net_fdset_handle_isset (signal_pipe[0], hrs))
- GNUNET_DISK_file_read (signal_pipe[0], buf, sizeof (buf));
- if ((mret != CURLM_OK) && (mret != CURLM_CALL_MULTI_PERFORM))
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_ADMIN | GNUNET_GE_USER |
- GNUNET_GE_BULK, _("%s failed at %s:%d: `%s'\n"),
- "curl_multi_perform", __FILE__, __LINE__,
- curl_multi_strerror (mret));
- if (mhd_daemon != NULL)
- MHD_run (mhd_daemon);
- cleanup_connections ();
- }
-#if DEBUG_HTTP
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "HTTP transport select thread exits.\n");
-#endif
+ GNUNET_free (plugin);
+ GNUNET_free (api);
return NULL;
}
-
-/**
- * Start the server process to receive inbound traffic.
- * @return GNUNET_OK on success, GNUNET_SYSERR if the operation failed
- */
-static int
-startTransportServer ()
-{
- unsigned short port;
-
- if ((curl_multi != NULL) || (http_running == GNUNET_YES))
- return GNUNET_SYSERR;
- curl_multi = curl_multi_init ();
- if (curl_multi == NULL)
- return GNUNET_SYSERR;
- port = get_port ();
- if ((mhd_daemon == NULL) && (port != 0))
- {
- if (GNUNET_YES !=
- GNUNET_GC_get_configuration_value_yesno (cfg, "GNUNETD",
- "DISABLE-IPV6",
- GNUNET_YES))
- {
- mhd_daemon = MHD_start_daemon (MHD_USE_IPv6,
- port,
- &acceptPolicyCallback,
- NULL, &accessHandlerCallback, NULL,
- MHD_OPTION_CONNECTION_TIMEOUT,
- (unsigned int) HTTP_TIMEOUT,
- MHD_OPTION_CONNECTION_MEMORY_LIMIT,
- (unsigned int) 1024 * 128,
- MHD_OPTION_CONNECTION_LIMIT,
- (unsigned int) 128,
- MHD_OPTION_PER_IP_CONNECTION_LIMIT,
- (unsigned int) 8,
- MHD_OPTION_NOTIFY_COMPLETED,
- &requestCompletedCallback, NULL,
- MHD_OPTION_END);
- }
- if (mhd_daemon == NULL)
- {
- /* try without IPv6 */
- mhd_daemon = MHD_start_daemon (MHD_NO_FLAG,
- port,
- &acceptPolicyCallback,
- NULL, &accessHandlerCallback, NULL,
- MHD_OPTION_CONNECTION_TIMEOUT,
- (unsigned int) HTTP_TIMEOUT,
- MHD_OPTION_CONNECTION_MEMORY_LIMIT,
- (unsigned int) 1024 * 128,
- MHD_OPTION_CONNECTION_LIMIT,
- (unsigned int) 128,
- MHD_OPTION_PER_IP_CONNECTION_LIMIT,
- (unsigned int) 8,
- MHD_OPTION_NOTIFY_COMPLETED,
- &requestCompletedCallback, NULL,
- MHD_OPTION_END);
- }
- else
- {
- available_protocols |= VERSION_AVAILABLE_IPV6;
- }
- if (mhd_daemon != NULL)
- available_protocols |= VERSION_AVAILABLE_IPV4;
- }
- if (port == 0)
- {
- /* NAT */
- available_protocols |= VERSION_AVAILABLE_IPV4;
- if (GNUNET_YES !=
- GNUNET_GC_get_configuration_value_yesno (cfg, "GNUNETD",
- "DISABLE-IPV6",
- GNUNET_YES))
- available_protocols |= VERSION_AVAILABLE_IPV6;
- }
- if (GNUNET_OK != GNUNET_DISK_pipe (signal_pipe, GNUNET_NO))
- {
- MHD_stop_daemon (mhd_daemon);
- curl_multi_cleanup (curl_multi);
- curl_multi = NULL;
- mhd_daemon = NULL;
- return GNUNET_SYSERR;
- }
- http_running = GNUNET_YES;
- curl_thread = GNUNET_thread_create (&curl_runner, NULL, 32 * 1024);
- if (curl_thread == NULL)
- GNUNET_GE_DIE_STRERROR (coreAPI->ectx,
- GNUNET_GE_FATAL | GNUNET_GE_ADMIN |
- GNUNET_GE_IMMEDIATE, "pthread_create");
- return GNUNET_OK;
-}
-
-/**
- * Shutdown the server process (stop receiving inbound
- * traffic). May be restarted later!
- */
-static int
-stopTransportServer ()
-{
- void *unused;
- int i;
- HTTPSession *s;
-
- if ((http_running == GNUNET_NO) || (curl_multi == NULL))
- return GNUNET_SYSERR;
- http_running = GNUNET_NO;
- signal_select ();
- GNUNET_thread_stop_sleep (curl_thread);
- GNUNET_thread_join (curl_thread, &unused);
- GNUNET_DISK_close (signal_pipe[0]);
- GNUNET_DISK_close (signal_pipe[1]);
- if (mhd_daemon != NULL)
- {
- MHD_stop_daemon (mhd_daemon);
- mhd_daemon = NULL;
- }
- cleanup_connections ();
- for (i = 0; i < tsessionCount; i++)
- {
- s = tsessions[i]->internal;
- if (s->users == 0)
- {
- destroy_tsession (tsessions[i]);
- i--;
- }
- }
- curl_multi_cleanup (curl_multi);
- curl_multi = NULL;
- return GNUNET_OK;
-}
-
-/* ******************** public API ******************** */
-
-/**
- * The exported method. Makes the core api available
- * via a global and returns the udp transport API.
- */
-GNUNET_TransportAPI *
-inittransport_http (GNUNET_CoreAPIForTransport * core)
-{
- GNUNET_GE_ASSERT (coreAPI->ectx, sizeof (HostAddress) == 24);
- coreAPI = core;
- cfg = coreAPI->cfg;
- lock = GNUNET_mutex_create (GNUNET_YES);
- if (0 != GNUNET_GC_attach_change_listener (coreAPI->cfg,
- &reload_configuration, NULL))
- {
- GNUNET_mutex_destroy (lock);
- lock = NULL;
- return NULL;
- }
- if (0 != curl_global_init (CURL_GLOBAL_WIN32))
- {
- GNUNET_GE_BREAK (NULL, 0);
- GNUNET_GC_detach_change_listener (coreAPI->cfg, &reload_configuration,
- NULL);
- GNUNET_mutex_destroy (lock);
- lock = NULL;
- return NULL;
- }
- tsessionCount = 0;
- tsessionArrayLength = 0;
- GNUNET_array_grow (tsessions, tsessionArrayLength, 32);
- if (GNUNET_GC_get_configuration_value_yesno (coreAPI->cfg,
- "HTTP", "UPNP",
- GNUNET_YES) == GNUNET_YES)
- {
- upnp = coreAPI->service_request ("upnp");
-
- if (upnp == NULL)
- {
- GNUNET_GE_LOG (coreAPI->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_USER |
- GNUNET_GE_IMMEDIATE,
- _
- ("The UPnP service could not be loaded. To disable UPnP, set the "
- "configuration option \"UPNP\" in section \"%s\" to \"NO\"\n"),
- "HTTP");
- }
- }
- stats = coreAPI->service_request ("stats");
- if (stats != NULL)
- {
- stat_bytesReceived
- = stats->create (gettext_noop ("# bytes received via HTTP"));
- stat_bytesSent = stats->create (gettext_noop ("# bytes sent via HTTP"));
- stat_bytesDropped
- = stats->create (gettext_noop ("# bytes dropped by HTTP (outgoing)"));
- stat_get_issued = stats->create (gettext_noop ("# HTTP GET issued"));
- stat_get_received
- = stats->create (gettext_noop ("# HTTP GET received"));
- stat_put_issued = stats->create (gettext_noop ("# HTTP PUT issued"));
- stat_put_received
- = stats->create (gettext_noop ("# HTTP PUT received"));
- stat_select_calls
- = stats->create (gettext_noop ("# HTTP select calls"));
-
- stat_send_calls = stats->create (gettext_noop ("# HTTP send calls"));
-
- stat_curl_send_callbacks
- = stats->create (gettext_noop ("# HTTP curl send callbacks"));
- stat_curl_receive_callbacks
- = stats->create (gettext_noop ("# HTTP curl receive callbacks"));
- stat_mhd_access_callbacks
- = stats->create (gettext_noop ("# HTTP mhd access callbacks"));
- stat_mhd_read_callbacks
- = stats->create (gettext_noop ("# HTTP mhd read callbacks"));
- stat_mhd_close_callbacks
- = stats->create (gettext_noop ("# HTTP mhd close callbacks"));
- stat_connect_calls
- = stats->create (gettext_noop ("# HTTP connect calls"));
- }
- GNUNET_GC_get_configuration_value_string (coreAPI->cfg,
- "GNUNETD", "HTTP-PROXY", "",
- &proxy);
-
- myAPI.protocol_number = GNUNET_TRANSPORT_PROTOCOL_NUMBER_HTTP;
- myAPI.mtu = 0;
- myAPI.cost = 20000; /* about equal to udp */
- myAPI.hello_verify = &verify_hello;
- myAPI.hello_create = &create_hello;
- myAPI.connect = &httpConnect;
- myAPI.associate = &httpAssociate;
- myAPI.send = &httpSend;
- myAPI.disconnect = &httpDisconnect;
- myAPI.server_start = &startTransportServer;
- myAPI.server_stop = &stopTransportServer;
- myAPI.hello_to_address = &hello_to_address;
- myAPI.send_now_test = &httpTestWouldTry;
-
- return &myAPI;
-}
-
-void
-donetransport_http ()
-{
- curl_global_cleanup ();
- GNUNET_free_non_null (proxy);
- proxy = NULL;
- GNUNET_array_grow (tsessions, tsessionArrayLength, 0);
- do_shutdown ();
-}
-
-/* end of http.c */
+/* end of plugin_transport_http.c */
projects / oweals / gnunet.git / commitdiff