int zmq::pgm_socket_t::init (bool udp_encapsulation_, const char *network_)
{
// Can not open transport before destroying old one.
zmq_assert (transport == NULL);
// Parse port number.
const char *port_delim = strchr (network_, ':');
if (!port_delim) {
errno = EINVAL;
return -1;
}
uint16_t port_number = atoi (port_delim + 1);
char network [256];
if (port_delim - network_ >= (int) sizeof (network) - 1) {
errno = EINVAL;
return -1;
}
memset (network, '\0', sizeof (network));
memcpy (network, network_, port_delim - network_);
// Zero counter used in msgrecv.
nbytes_rec = 0;
nbytes_processed = 0;
pgm_msgv_processed = 0;
GError *pgm_error = NULL;
// Init PGM transport.
// Ensure threading enabled, ensure timer enabled and find PGM protocol id.
//
// Note that if you want to use gettimeofday and sleep for openPGM timing,
// set environment variables PGM_TIMER to "GTOD"
// and PGM_SLEEP to "USLEEP".
int rc = pgm_init ();
if (rc != 0) {
errno = EINVAL;
return -1;
}
// PGM transport GSI.
pgm_gsi_t gsi;
std::string gsi_base;
if (options.identity.size () > 0) {
// Create gsi from identity string.
gsi_base = options.identity;
} else {
// Generate random gsi.
gsi_base = uuid_t ().to_string ();
}
rc = pgm_gsi_create_from_string (&gsi, gsi_base.c_str (), -1);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
struct pgm_transport_info_t *res = NULL;
if (!pgm_if_get_transport_info (network, NULL, &res, &pgm_error)) {
if (pgm_error->domain == PGM_IF_ERROR && (
pgm_error->code == PGM_IF_ERROR_INVAL ||
pgm_error->code == PGM_IF_ERROR_XDEV ||
pgm_error->code == PGM_IF_ERROR_NODEV ||
pgm_error->code == PGM_IF_ERROR_NOTUNIQ ||
pgm_error->code == PGM_IF_ERROR_ADDRFAMILY ||
pgm_error->code == PGM_IF_ERROR_FAMILY ||
pgm_error->code == PGM_IF_ERROR_NODATA ||
pgm_error->code == PGM_IF_ERROR_NONAME ||
pgm_error->code == PGM_IF_ERROR_SERVICE)) {
errno = EINVAL;
g_error_free (pgm_error);
return -1;
}
zmq_assert (false);
}
res->ti_gsi = gsi;
res->ti_dport = port_number;
// If we are using UDP encapsulation update gsr or res.
if (udp_encapsulation_) {
res->ti_udp_encap_ucast_port = port_number;
res->ti_udp_encap_mcast_port = port_number;
}
if (!pgm_transport_create (&transport, res, &pgm_error)) {
if (pgm_error->domain == PGM_TRANSPORT_ERROR && (
pgm_error->code == PGM_TRANSPORT_ERROR_INVAL ||
pgm_error->code == PGM_TRANSPORT_ERROR_PERM ||
pgm_error->code == PGM_TRANSPORT_ERROR_NODEV)) {
pgm_if_free_transport_info (res);
g_error_free (pgm_error);
errno = EINVAL;
return -1;
}
zmq_assert (false);
}
pgm_if_free_transport_info (res);
// Common parameters for receiver and sender.
// Set maximum transport protocol data unit size (TPDU).
rc = pgm_transport_set_max_tpdu (transport, pgm_max_tpdu);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
// Set maximum number of network hops to cross.
rc = pgm_transport_set_hops (transport, 16);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
// Set nonblocking send/recv sockets.
if (!pgm_transport_set_nonblocking (transport, true)) {
errno = EINVAL;
return -1;
}
if (receiver) {
// Receiver transport.
// Note that NAKs are still generated by the transport.
rc = pgm_transport_set_recv_only (transport, true, false);
zmq_assert (rc == TRUE);
if (options.rcvbuf) {
rc = pgm_transport_set_rcvbuf (transport, (int) options.rcvbuf);
if (rc != TRUE)
return -1;
}
// Set NAK transmit back-off interval [us].
rc = pgm_transport_set_nak_bo_ivl (transport, 50 * 1000);
zmq_assert (rc == TRUE);
// Set timeout before repeating NAK [us].
rc = pgm_transport_set_nak_rpt_ivl (transport, 200 * 1000);
zmq_assert (rc == TRUE);
// Set timeout for receiving RDATA.
rc = pgm_transport_set_nak_rdata_ivl (transport, 200 * 1000);
zmq_assert (rc == TRUE);
// Set retries for NAK without NCF/DATA (NAK_DATA_RETRIES).
rc = pgm_transport_set_nak_data_retries (transport, 5);
zmq_assert (rc == TRUE);
// Set retries for NCF after NAK (NAK_NCF_RETRIES).
rc = pgm_transport_set_nak_ncf_retries (transport, 2);
zmq_assert (rc == TRUE);
// Set timeout for removing a dead peer [us].
rc = pgm_transport_set_peer_expiry (transport, 5 * 8192 * 1000);
zmq_assert (rc == TRUE);
// Set expiration time of SPM Requests [us].
rc = pgm_transport_set_spmr_expiry (transport, 25 * 1000);
zmq_assert (rc == TRUE);
// Set the size of the receive window.
// Data rate is in [B/s]. options.rate is in [kb/s].
if (options.rate <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_rxw_max_rte (transport,
options.rate * 1000 / 8);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
// Recovery interval [s].
if (options.recovery_ivl <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_rxw_secs (transport, options.recovery_ivl);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
} else {
// Sender transport.
// Waiting pipe won't be read.
rc = pgm_transport_set_send_only (transport, TRUE);
zmq_assert (rc == TRUE);
if (options.sndbuf) {
rc = pgm_transport_set_sndbuf (transport, (int) options.sndbuf);
if (rc != TRUE)
return -1;
}
// Set the size of the send window.
// Data rate is in [B/s] options.rate is in [kb/s].
if (options.rate <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_txw_max_rte (transport,
options.rate * 1000 / 8);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
// Recovery interval [s].
if (options.recovery_ivl <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_txw_secs (transport, options.recovery_ivl);
if (rc != TRUE) {
errno = EINVAL;
return -1;
}
// Set interval of background SPM packets [us].
rc = pgm_transport_set_ambient_spm (transport, 8192 * 1000);
zmq_assert (rc == TRUE);
// Set intervals of data flushing SPM packets [us].
guint spm_heartbeat[] = {4 * 1000, 4 * 1000, 8 * 1000, 16 * 1000,
32 * 1000, 64 * 1000, 128 * 1000, 256 * 1000, 512 * 1000,
1024 * 1000, 2048 * 1000, 4096 * 1000, 8192 * 1000};
rc = pgm_transport_set_heartbeat_spm (transport, spm_heartbeat,
G_N_ELEMENTS(spm_heartbeat));
zmq_assert (rc == TRUE);
}
// Enable multicast loopback.
if (options.use_multicast_loop) {
rc = pgm_transport_set_multicast_loop (transport, true);
zmq_assert (rc == TRUE);
}
// Bind a transport to the specified network devices.
if (!pgm_transport_bind (transport, &pgm_error)) {
if (pgm_error->domain == PGM_IF_ERROR && (
pgm_error->code == PGM_IF_ERROR_INVAL ||
pgm_error->code == PGM_IF_ERROR_XDEV ||
pgm_error->code == PGM_IF_ERROR_NODEV ||
pgm_error->code == PGM_IF_ERROR_NOTUNIQ ||
pgm_error->code == PGM_IF_ERROR_ADDRFAMILY ||
pgm_error->code == PGM_IF_ERROR_FAMILY ||
pgm_error->code == PGM_IF_ERROR_NODATA ||
pgm_error->code == PGM_IF_ERROR_NONAME ||
pgm_error->code == PGM_IF_ERROR_SERVICE)) {
g_error_free (pgm_error);
errno = EINVAL;
return -1;
}
zmq_assert (false);
}
// For receiver transport preallocate pgm_msgv array.
// TODO: ?
if (receiver) {
zmq_assert (in_batch_size > 0);
size_t max_tsdu_size = get_max_tsdu_size ();
pgm_msgv_len = (int) in_batch_size / max_tsdu_size;
if ((int) in_batch_size % max_tsdu_size)
pgm_msgv_len++;
zmq_assert (pgm_msgv_len);
pgm_msgv = (pgm_msgv_t*) malloc (sizeof (pgm_msgv_t) * pgm_msgv_len);
}
return 0;
}
int zmq::pgm_socket_t::open_transport ()
{
// Can not open transport before destroying old one.
zmq_assert (transport == NULL);
// Zero counter used in msgrecv.
nbytes_rec = 0;
nbytes_processed = 0;
pgm_msgv_processed = 0;
// TODO: Converting bool to int? Not nice.
int pgm_ok = true;
GError *pgm_error = NULL;
// Init PGM transport.
// Ensure threading enabled, ensure timer enabled and find PGM protocol id.
//
// Note that if you want to use gettimeofday and sleep for openPGM timing,
// set environment variables PGM_TIMER to "GTOD"
// and PGM_SLEEP to "USLEEP".
int rc = pgm_init ();
if (rc != 0) {
errno = EINVAL;
return -1;
}
// PGM transport GSI.
pgm_gsi_t gsi;
std::string gsi_base;
if (options.identity.size () > 0) {
// Create gsi from identity string.
gsi_base = options.identity;
} else {
// Generate random gsi.
gsi_base = uuid_t ().to_string ();
}
rc = pgm_gsi_create_from_string (&gsi, gsi_base.c_str (), -1);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
//zmq_log (1, "Transport GSI: %s, %s(%i)\n", pgm_print_gsi (&gsi),
// __FILE__, __LINE__);
struct pgm_transport_info_t *res = NULL;
if (!pgm_if_get_transport_info (network, NULL, &res, &pgm_error)) {
errno = EINVAL;
return -1;
}
res->ti_gsi = gsi;
res->ti_dport = port_number;
// If we are using UDP encapsulation update gsr or res.
if (udp_encapsulation) {
res->ti_udp_encap_ucast_port = port_number;
res->ti_udp_encap_mcast_port = port_number;
}
if (!pgm_transport_create (&transport, res, &pgm_error)) {
pgm_if_free_transport_info (res);
// TODO: tranlate errors from glib into errnos.
errno = EINVAL;
return -1;
}
pgm_if_free_transport_info (res);
// Common parameters for receiver and sender.
// Set maximum transport protocol data unit size (TPDU).
rc = pgm_transport_set_max_tpdu (transport, pgm_max_tpdu);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
// Set maximum number of network hops to cross.
rc = pgm_transport_set_hops (transport, 16);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
// Set nonblocking send/recv sockets.
if (!pgm_transport_set_nonblocking (transport, true)) {
errno = EINVAL;
return -1;
}
if (receiver) {
// Receiver transport.
// Set transport->can_send_data = FALSE.
// Note that NAKs are still generated by the transport.
rc = pgm_transport_set_recv_only (transport, true, false);
zmq_assert (rc == pgm_ok);
if (options.rcvbuf) {
rc = pgm_transport_set_rcvbuf (transport, (int) options.rcvbuf);
if (rc != pgm_ok)
return -1;
}
// Set NAK transmit back-off interval [us].
rc = pgm_transport_set_nak_bo_ivl (transport, 50 * 1000);
zmq_assert (rc == pgm_ok);
// Set timeout before repeating NAK [us].
rc = pgm_transport_set_nak_rpt_ivl (transport, 200 * 1000);
zmq_assert (rc == pgm_ok);
// Set timeout for receiving RDATA.
rc = pgm_transport_set_nak_rdata_ivl (transport, 200 * 1000);
zmq_assert (rc == pgm_ok);
// Set retries for NAK without NCF/DATA (NAK_DATA_RETRIES).
rc = pgm_transport_set_nak_data_retries (transport, 5);
zmq_assert (rc == pgm_ok);
// Set retries for NCF after NAK (NAK_NCF_RETRIES).
rc = pgm_transport_set_nak_ncf_retries (transport, 2);
zmq_assert (rc == pgm_ok);
// Set timeout for removing a dead peer [us].
rc = pgm_transport_set_peer_expiry (transport, 5 * 8192 * 1000);
zmq_assert (rc == pgm_ok);
// Set expiration time of SPM Requests [us].
rc = pgm_transport_set_spmr_expiry (transport, 25 * 1000);
zmq_assert (rc == pgm_ok);
// Set the size of the receive window.
// Data rate is in [B/s]. options.rate is in [kb/s].
if (options.rate <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_rxw_max_rte (transport,
options.rate * 1000 / 8);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
// Recovery interval [s].
if (options.recovery_ivl <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_rxw_secs (transport, options.recovery_ivl);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
} else {
// Sender transport.
// Set transport->can_recv = FALSE, waiting_pipe will not be read.
rc = pgm_transport_set_send_only (transport, TRUE);
zmq_assert (rc == pgm_ok);
if (options.sndbuf) {
rc = pgm_transport_set_sndbuf (transport, (int) options.sndbuf);
if (rc != pgm_ok)
return -1;
}
// Set the size of the send window.
// Data rate is in [B/s] options.rate is in [kb/s].
if (options.rate <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_txw_max_rte (transport,
options.rate * 1000 / 8);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
// Recovery interval [s].
if (options.recovery_ivl <= 0) {
errno = EINVAL;
return -1;
}
rc = pgm_transport_set_txw_secs (transport, options.recovery_ivl);
if (rc != pgm_ok) {
errno = EINVAL;
return -1;
}
// Set interval of background SPM packets [us].
rc = pgm_transport_set_ambient_spm (transport, 8192 * 1000);
zmq_assert (rc == pgm_ok);
// Set intervals of data flushing SPM packets [us].
guint spm_heartbeat[] = {4 * 1000, 4 * 1000, 8 * 1000, 16 * 1000,
32 * 1000, 64 * 1000, 128 * 1000, 256 * 1000, 512 * 1000,
1024 * 1000, 2048 * 1000, 4096 * 1000, 8192 * 1000};
rc = pgm_transport_set_heartbeat_spm (transport, spm_heartbeat,
G_N_ELEMENTS(spm_heartbeat));
zmq_assert (rc == pgm_ok);
}
// Enable multicast loopback.
if (options.use_multicast_loop) {
rc = pgm_transport_set_multicast_loop (transport, true);
zmq_assert (rc == pgm_ok);
}
// Bind a transport to the specified network devices.
if (!pgm_transport_bind (transport, &pgm_error)) {
// TODO: tranlate errors from glib into errnos.
return -1;
}
return 0;
}