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/* vim:ts=8:sts=8:sw=4:noai:noexpandtab
*
* プリン PGM sender
*
* Copyright (c) 2006-2010 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <clocale>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#ifndef _WIN32
# include <unistd.h>
# include <netinet/in.h>
#else
# include "getopt.h"
#endif
#include <pgm/pgm.hh>
/* globals */
static int port = 0;
static const char* network = "";
static bool use_multicast_loop = FALSE;
static int udp_encap_port = 0;
static int max_tpdu = 1500;
static int max_rte = 400*1000; /* very conservative rate, 2.5mb/s */
static int sqns = 100;
static bool use_fec = FALSE;
static int rs_k = 8;
static int rs_n = 255;
static ip::pgm::endpoint* endpoint = NULL;
static ip::pgm::socket* sock = NULL;
#ifndef _MSC_VER
static void usage (const char*) __attribute__((__noreturn__));
#else
static void usage (const char*);
#endif
static bool create_sock (void);
static void
usage (
const char* bin
)
{
std::cerr << "Usage: " << bin << " [options] message" << std::endl;
std::cerr << " -n <network> : Multicast group or unicast IP address" << std::endl;
std::cerr << " -s <port> : IP port" << std::endl;
std::cerr << " -p <port> : Encapsulate PGM in UDP on IP port" << std::endl;
std::cerr << " -r <rate> : Regulate to rate bytes per second" << std::endl;
std::cerr << " -f <type> : Enable FEC with either proactive or ondemand parity" << std::endl;
std::cerr << " -K <k> : Configure Reed-Solomon code (n, k)" << std::endl;
std::cerr << " -N <n>" << std::endl;
std::cerr << " -l : Enable multicast loopback and address sharing" << std::endl;
std::cerr << " -i : List available interfaces" << std::endl;
exit (EXIT_SUCCESS);
}
int
main (
int argc,
char *argv[]
)
{
cpgm::pgm_error_t* pgm_err = NULL;
std::setlocale (LC_ALL, "");
if (!cpgm::pgm_init (&pgm_err)) {
std::cerr << "Unable to start PGM engine: " << pgm_err->message << std::endl;
cpgm::pgm_error_free (pgm_err);
return EXIT_FAILURE;
}
/* parse program arguments */
const char* binary_name = strrchr (argv[0], '/');
int c;
while ((c = getopt (argc, argv, "s:n:p:r:f:K:N:lih")) != -1)
{
switch (c) {
case 'n': network = optarg; break;
case 's': port = atoi (optarg); break;
case 'p': udp_encap_port = atoi (optarg); break;
case 'r': max_rte = atoi (optarg); break;
case 'f': use_fec = TRUE; break;
case 'K': rs_k = atoi (optarg); break;
case 'N': rs_n = atoi (optarg); break;
case 'l': use_multicast_loop = TRUE; break;
case 'i':
cpgm::pgm_if_print_all();
return EXIT_SUCCESS;
case 'h':
case '?':
usage (binary_name);
}
}
if (use_fec && ( !rs_n || !rs_k )) {
std::cerr << "Invalid Reed-Solomon parameters RS(" << rs_n << "," << rs_k << ")." << std::endl;
usage (binary_name);
}
if (create_sock())
{
while (optind < argc) {
const int status = sock->send (argv[optind], strlen (argv[optind]) + 1, NULL);
if (cpgm::PGM_IO_STATUS_NORMAL != status) {
std::cerr << "pgm_send() failed.." << std::endl;
}
optind++;
}
}
/* cleanup */
if (sock) {
sock->close (TRUE);
sock = NULL;
}
cpgm::pgm_shutdown();
return EXIT_SUCCESS;
}
static
bool
create_sock (void)
{
struct cpgm::pgm_addrinfo_t* res = NULL;
cpgm::pgm_error_t* pgm_err = NULL;
sa_family_t sa_family = AF_UNSPEC;
/* parse network parameter into PGM socket address structure */
if (!cpgm::pgm_getaddrinfo (network, NULL, &res, &pgm_err)) {
std::cerr << "Parsing network parameter: " << pgm_err->message << std::endl;
goto err_abort;
}
sa_family = res->ai_send_addrs[0].gsr_group.ss_family;
sock = new ip::pgm::socket();
if (udp_encap_port) {
if (!sock->open (sa_family, SOCK_SEQPACKET, IPPROTO_UDP, &pgm_err)) {
std::cerr << "Creating PGM/UDP socket: " << pgm_err->message << std::endl;
goto err_abort;
}
sock->set_option (IPPROTO_PGM, cpgm::PGM_UDP_ENCAP_UCAST_PORT, &udp_encap_port, sizeof(udp_encap_port));
sock->set_option (IPPROTO_PGM, cpgm::PGM_UDP_ENCAP_MCAST_PORT, &udp_encap_port, sizeof(udp_encap_port));
} else {
if (!sock->open (sa_family, SOCK_SEQPACKET, IPPROTO_PGM, &pgm_err)) {
std::cerr << "Creating PGM/IP socket: " << pgm_err->message << std::endl;
goto err_abort;
}
}
{
/* Use RFC 2113 tagging for PGM Router Assist */
const int no_router_assist = 0;
sock->set_option (IPPROTO_PGM, cpgm::PGM_IP_ROUTER_ALERT, &no_router_assist, sizeof(no_router_assist));
}
cpgm::pgm_drop_superuser();
{
/* set PGM parameters */
const int send_only = 1,
ambient_spm = pgm_secs (30),
heartbeat_spm[] = { pgm_msecs (100),
pgm_msecs (100),
pgm_msecs (100),
pgm_msecs (100),
pgm_msecs (1300),
pgm_secs (7),
pgm_secs (16),
pgm_secs (25),
pgm_secs (30) };
sock->set_option (IPPROTO_PGM, cpgm::PGM_SEND_ONLY, &send_only, sizeof(send_only));
sock->set_option (IPPROTO_PGM, cpgm::PGM_MTU, &max_tpdu, sizeof(max_tpdu));
sock->set_option (IPPROTO_PGM, cpgm::PGM_TXW_SQNS, &sqns, sizeof(sqns));
sock->set_option (IPPROTO_PGM, cpgm::PGM_TXW_MAX_RTE, &max_rte, sizeof(max_rte));
sock->set_option (IPPROTO_PGM, cpgm::PGM_AMBIENT_SPM, &ambient_spm, sizeof(ambient_spm));
sock->set_option (IPPROTO_PGM, cpgm::PGM_HEARTBEAT_SPM, &heartbeat_spm, sizeof(heartbeat_spm));
}
if (use_fec) {
struct cpgm::pgm_fecinfo_t fecinfo;
fecinfo.block_size = rs_n;
fecinfo.proactive_packets = 0;
fecinfo.group_size = rs_k;
fecinfo.ondemand_parity_enabled = TRUE;
fecinfo.var_pktlen_enabled = TRUE;
sock->set_option (IPPROTO_PGM, cpgm::PGM_USE_FEC, &fecinfo, sizeof(fecinfo));
}
/* create global session identifier */
endpoint = new ip::pgm::endpoint (DEFAULT_DATA_DESTINATION_PORT);
/* assign socket to specified address */
if (!sock->bind (*endpoint, &pgm_err)) {
std::cerr << "Binding PGM socket: " << pgm_err->message << std::endl;
goto err_abort;
}
/* join IP multicast groups */
for (unsigned i = 0; i < res->ai_recv_addrs_len; i++)
sock->set_option (IPPROTO_PGM, cpgm::PGM_JOIN_GROUP, &res->ai_recv_addrs[i], sizeof(struct group_req));
sock->set_option (IPPROTO_PGM, cpgm::PGM_SEND_GROUP, &res->ai_send_addrs[0], sizeof(struct group_req));
cpgm::pgm_freeaddrinfo (res);
{
/* set IP parameters */
const int blocking = 0,
multicast_loop = use_multicast_loop ? 1 : 0,
multicast_hops = 16,
dscp = 0x2e << 2; /* Expedited Forwarding PHB for network elements, no ECN. */
sock->set_option (IPPROTO_PGM, cpgm::PGM_MULTICAST_LOOP, &multicast_loop, sizeof(multicast_loop));
sock->set_option (IPPROTO_PGM, cpgm::PGM_MULTICAST_HOPS, &multicast_hops, sizeof(multicast_hops));
sock->set_option (IPPROTO_PGM, cpgm::PGM_TOS, &dscp, sizeof(dscp));
sock->set_option (IPPROTO_PGM, cpgm::PGM_NOBLOCK, &blocking, sizeof(blocking));
}
if (!sock->connect (&pgm_err)) {
fprintf (stderr, "Connecting PGM socket: %s\n", pgm_err->message);
goto err_abort;
}
return TRUE;
err_abort:
if (NULL != sock) {
sock->close (FALSE);
sock = NULL;
}
if (NULL != res) {
cpgm::pgm_freeaddrinfo (res);
res = NULL;
}
if (NULL != pgm_err) {
cpgm::pgm_error_free (pgm_err);
pgm_err = NULL;
}
return FALSE;
}
/* eof */
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