/* This file is part of GNUnet. (C) 2009 Christian Grothoff (and other contributing authors) GNUnet is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GNUnet is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNUnet; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /** * @file src/transport/gnunet-transport.c * @brief Tool to help configure, measure and control the transport subsystem. * @author Christian Grothoff * @author Nathan Evans * * This utility can be used to test if a transport mechanism for * GNUnet is properly configured. */ #include "platform.h" #include "gnunet_program_lib.h" #include "gnunet_protocols.h" #include "gnunet_transport_service.h" /** * Which peer should we connect to? */ static char *cpid; /** * Handle to transport service. */ static struct GNUNET_TRANSPORT_Handle *handle; /** * Option -s. */ static int benchmark_send; /** * Option -b. */ static int benchmark_receive; /** * Option -l. */ static int benchmark_receive; /** * Option -i. */ static int iterate_connections; /** * Global return value (0 success). */ static int ret; /** * Number of bytes of traffic we received so far. */ static unsigned long long traffic_received; /** * Number of bytes of traffic we sent so far. */ static unsigned long long traffic_sent; /** * Starting time of transmitting/receiving data. */ static struct GNUNET_TIME_Absolute start_time; /** * Handle for current transmission request. */ static struct GNUNET_TRANSPORT_TransmitHandle *th; /** * Identity of the peer we transmit to / connect to. * (equivalent to 'cpid' string). */ static struct GNUNET_PeerIdentity pid; /** * Task scheduled for cleanup / termination of the process. */ static GNUNET_SCHEDULER_TaskIdentifier end; /** * Selected level of verbosity. */ static int verbosity; /** * Shutdown, print statistics. */ static void do_disconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { struct GNUNET_TIME_Relative duration; if (NULL != th) { GNUNET_TRANSPORT_notify_transmit_ready_cancel (th); th = NULL; } GNUNET_TRANSPORT_disconnect (handle); if (benchmark_receive) { duration = GNUNET_TIME_absolute_get_duration (start_time); fprintf (stdout, _("Received %llu bytes/s (%llu bytes in %llu ms)\n"), 1000 * traffic_received / (1+duration.rel_value), traffic_received, (unsigned long long) duration.rel_value); } if (benchmark_send) { duration = GNUNET_TIME_absolute_get_duration (start_time); fprintf (stdout, _("Transmitted %llu bytes/s (%llu bytes in %llu ms)\n"), 1000 * traffic_sent / (1+duration.rel_value), traffic_sent, (unsigned long long) duration.rel_value); } } /** * Function called to notify a client about the socket * begin ready to queue more data. "buf" will be * NULL and "size" zero if the socket was closed for * writing in the meantime. * * @param cls closure * @param size number of bytes available in buf * @param buf where the callee should write the message * @return number of bytes written to buf */ static size_t transmit_data (void *cls, size_t size, void *buf) { struct GNUNET_MessageHeader *m = buf; GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader)); GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE); m->size = ntohs (size); m->type = ntohs (GNUNET_MESSAGE_TYPE_DUMMY); memset (&m[1], 52, size - sizeof (struct GNUNET_MessageHeader)); traffic_sent += size; th = GNUNET_TRANSPORT_notify_transmit_ready (handle, &pid, 32 * 1024, 0, GNUNET_TIME_UNIT_FOREVER_REL, &transmit_data, NULL); if (verbosity > 0) fprintf (stdout, _("Transmitting %u bytes to %s\n"), (unsigned int) size, GNUNET_i2s (&pid)); return size; } /** * Function called to notify transport users that another * peer connected to us. * * @param cls closure * @param peer the peer that connected * @param ats performance data * @param ats_count number of entries in ats (excluding 0-termination) */ static void notify_connect (void *cls, const struct GNUNET_PeerIdentity * peer, const struct GNUNET_ATS_Information * ats, uint32_t ats_count) { if (verbosity > 0) fprintf (stdout, _("Connected to %s\n"), GNUNET_i2s (peer)); if (0 != memcmp (&pid, peer, sizeof (struct GNUNET_PeerIdentity))) return; ret = 0; if (benchmark_send) { start_time = GNUNET_TIME_absolute_get (); th = GNUNET_TRANSPORT_notify_transmit_ready (handle, peer, 32 * 1024, 0, GNUNET_TIME_UNIT_FOREVER_REL, &transmit_data, NULL); } else { /* all done, terminate instantly */ GNUNET_SCHEDULER_cancel (end); end = GNUNET_SCHEDULER_add_now (&do_disconnect, NULL); } } /** * Function called to notify transport users that another * peer disconnected from us. * * @param cls closure * @param peer the peer that disconnected */ static void notify_disconnect (void *cls, const struct GNUNET_PeerIdentity * peer) { if (verbosity > 0) fprintf (stdout, _("Disconnected from %s\n"), GNUNET_i2s (peer)); if ( (0 == memcmp (&pid, peer, sizeof (struct GNUNET_PeerIdentity))) && (NULL != th) ) { GNUNET_TRANSPORT_notify_transmit_ready_cancel (th); th = NULL; GNUNET_SCHEDULER_cancel (end); end = GNUNET_SCHEDULER_add_now (&do_disconnect, NULL); } } /** * Function called by the transport for each received message. * * @param cls closure * @param peer (claimed) identity of the other peer * @param message the message * @param ats performance data * @param ats_count number of entries in ats */ static void notify_receive (void *cls, const struct GNUNET_PeerIdentity * peer, const struct GNUNET_MessageHeader * message, const struct GNUNET_ATS_Information * ats, uint32_t ats_count) { if (! benchmark_receive) return; if (verbosity > 0) fprintf (stdout, _("Received %u bytes from %s\n"), (unsigned int) ntohs (message->size), GNUNET_i2s (peer)); if (traffic_received == 0) start_time = GNUNET_TIME_absolute_get (); traffic_received += ntohs (message->size); } /** * Function to call with a human-readable format of an address * * @param cls closure * @param address NULL on error, otherwise 0-terminated printable UTF-8 string */ static void process_address (void *cls, const struct GNUNET_PeerIdentity *peer, const char *transport, const void *addr, size_t addrlen) { if ((peer != NULL) || (transport != NULL) || ((addr != NULL) && (addrlen > 0))) fprintf (stdout, _("Peer `%s' plugin: `%s' address `%s'\n"), (peer != NULL) ? GNUNET_i2s (peer) : "", (transport != NULL) ? transport : "", ((addr != NULL) && (addrlen > 0) && (transport != NULL)) ? "how do i resolve the name without transport service?" : ""); } /** * Main function that will be run by the scheduler. * * @param cls closure * @param args remaining command-line arguments * @param cfgfile name of the configuration file used (for saving, can be NULL!) * @param cfg configuration */ static void run (void *cls, char *const *args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg) { if (benchmark_send && (NULL == cpid)) { fprintf (stderr, _("Option `%s' makes no sense without option `%s'.\n"), "-s", "-C"); return; } if (NULL != cpid) { ret = 1; if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string (cpid, &pid.hashPubKey)) { fprintf (stderr, _("Failed to parse peer identity `%s'\n"), cpid); return; } handle = GNUNET_TRANSPORT_connect (cfg, NULL, NULL, ¬ify_receive, ¬ify_connect, ¬ify_disconnect); GNUNET_TRANSPORT_try_connect (handle, &pid); end = GNUNET_SCHEDULER_add_delayed (benchmark_send ? GNUNET_TIME_UNIT_FOREVER_REL : GNUNET_TIME_UNIT_SECONDS, &do_disconnect, NULL); } else if (benchmark_receive) { handle = GNUNET_TRANSPORT_connect (cfg, NULL, NULL, ¬ify_receive, ¬ify_connect, ¬ify_disconnect); GNUNET_TRANSPORT_try_connect (handle, &pid); end = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &do_disconnect, NULL); } if (iterate_connections) { GNUNET_TRANSPORT_address_iterate (cfg, GNUNET_TIME_UNIT_MINUTES, &process_address, NULL); } } int main (int argc, char *const *argv) { static const struct GNUNET_GETOPT_CommandLineOption options[] = { {'b', "benchmark", NULL, gettext_noop ("measure how fast we are receiving data (until CTRL-C)"), 0, &GNUNET_GETOPT_set_one, &benchmark_receive}, {'C', "connect", "PEER", gettext_noop ("try to connect to the given peer"), 1, &GNUNET_GETOPT_set_string, &cpid}, {'i', "information", NULL, gettext_noop ("provide information about all current connections (once)"), 0, &GNUNET_GETOPT_set_one, &iterate_connections}, {'s', "send", NULL, gettext_noop ("send data for benchmarking to the other peer (until CTRL-C)"), 0, &GNUNET_GETOPT_set_one, &benchmark_send}, GNUNET_GETOPT_OPTION_VERBOSE(&verbosity), GNUNET_GETOPT_OPTION_END }; return (GNUNET_OK == GNUNET_PROGRAM_run (argc, argv, "gnunet-transport", gettext_noop ("Direct access to transport service."), options, &run, NULL)) ? ret : 1; } /* end of gnunet-transport.c */