diff options
Diffstat (limited to '3rdparty/openpgm-svn-r1085/pgm/examples/shortcakerecv.c')
-rw-r--r-- | 3rdparty/openpgm-svn-r1085/pgm/examples/shortcakerecv.c | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/3rdparty/openpgm-svn-r1085/pgm/examples/shortcakerecv.c b/3rdparty/openpgm-svn-r1085/pgm/examples/shortcakerecv.c new file mode 100644 index 0000000..87ce8dc --- /dev/null +++ b/3rdparty/openpgm-svn-r1085/pgm/examples/shortcakerecv.c @@ -0,0 +1,430 @@ +/* vim:ts=8:sts=8:sw=4:noai:noexpandtab + * + * ショートケーキ PGM receiver + * + * 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 <assert.h> +#include <locale.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#ifndef _WIN32 +# include <unistd.h> +#else +# include "getopt.h" +# define snprintf _snprintf +#endif +#include <pgm/pgm.h> + +#include "async.h" + + +/* 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 sqns = 100; + +static bool use_fec = FALSE; +static int rs_k = 8; +static int rs_n = 255; + +static pgm_sock_t* sock = NULL; +static async_t* async = NULL; +static bool is_terminated = FALSE; + +#ifndef _WIN32 +static int terminate_pipe[2]; +static void on_signal (int); +#else +static HANDLE terminate_event; +static BOOL on_console_ctrl (DWORD); +#endif +#ifndef _MSC_VER +static void usage (const char*) __attribute__((__noreturn__)); +#else +static void usage (const char*); +#endif + +static bool on_startup (void); +static int on_data (const void*restrict, const size_t, const struct pgm_sockaddr_t*restrict); + + +static void +usage ( + const char* bin + ) +{ + fprintf (stderr, "Usage: %s [options]\n", bin); + fprintf (stderr, " -n <network> : Multicast group or unicast IP address\n"); + fprintf (stderr, " -s <port> : IP port\n"); + fprintf (stderr, " -p <port> : Encapsulate PGM in UDP on IP port\n"); + fprintf (stderr, " -f <type> : Enable FEC with either proactive or ondemand parity\n"); + fprintf (stderr, " -K <k> : Configure Reed-Solomon code (n, k)\n"); + fprintf (stderr, " -N <n>\n"); + fprintf (stderr, " -l : Enable multicast loopback and address sharing\n"); + fprintf (stderr, " -i : List available interfaces\n"); + exit (EXIT_SUCCESS); +} + +int +main ( + int argc, + char* argv[] + ) +{ + pgm_error_t* pgm_err = NULL; + + setlocale (LC_ALL, ""); + +#if !defined(_WIN32) || defined(CONFIG_TARGET_WINE) + puts ("いちごのショートケーキ"); +#else + _putws (L"いちごのショートケーキ"); +#endif + + if (!pgm_init (&pgm_err)) { + fprintf (stderr, "Unable to start PGM engine: %s\n", pgm_err->message); + 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: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 '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': + pgm_if_print_all(); + return EXIT_SUCCESS; + + case 'h': + case '?': usage (binary_name); + } + } + + if (use_fec && ( !rs_n || !rs_k )) { + fprintf (stderr, "Invalid Reed-Solomon parameters RS(%d,%d).\n", rs_n, rs_k); + usage (binary_name); + } + +/* setup signal handlers */ +#ifdef SIGHUP + signal (SIGHUP, SIG_IGN); +#endif +#ifndef _WIN32 + int e = pipe (terminate_pipe); + assert (0 == e); + signal (SIGINT, on_signal); + signal (SIGTERM, on_signal); +#else + terminate_event = CreateEvent (NULL, TRUE, FALSE, TEXT("TerminateEvent")); + SetConsoleCtrlHandler ((PHANDLER_ROUTINE)on_console_ctrl, TRUE); +#endif /* !_WIN32 */ + + if (!on_startup()) { + fprintf (stderr, "Startup failed\n"); + return EXIT_FAILURE; + } + +/* dispatch loop */ +#ifndef _WIN32 + int fds, read_fd = async_get_fd (async); + fd_set readfds; +#else + int n_handles = 2; + HANDLE waitHandles[ 2 ]; + DWORD dwEvents; + WSAEVENT recvEvent; + + recvEvent = async_get_event (async); + + waitHandles[0] = terminate_event; + waitHandles[1] = recvEvent; +#endif /* !_WIN32 */ + puts ("Entering PGM message loop ... "); + do { + char buffer[4096]; + struct pgm_sockaddr_t from; + socklen_t fromlen = sizeof (from); + const ssize_t len = async_recvfrom (async, + buffer, + sizeof(buffer), + &from, + &fromlen); + if (len >= 0) { + on_data (buffer, len, &from); + } else { +#ifndef _WIN32 + fds = MAX(terminate_pipe[0], read_fd) + 1; + FD_ZERO(&readfds); + FD_SET(terminate_pipe[0], &readfds); + FD_SET(read_fd, &readfds); + fds = select (fds, &readfds, NULL, NULL, NULL); +#else + dwEvents = WaitForMultipleObjects (n_handles, waitHandles, FALSE, INFINITE); + switch (dwEvents) { + case WAIT_OBJECT_0+1: ResetEvent (recvEvent); break; + default: break; + } +#endif /* _WIN32 */ + } + } while (!is_terminated); + + puts ("Message loop terminated, cleaning up."); + +/* cleanup */ +#ifndef _WIN32 + close (terminate_pipe[0]); + close (terminate_pipe[1]); +#else + CloseHandle (terminate_event); +#endif /* !_WIN32 */ + + if (async) { + puts ("Destroying asynchronous queue."); + async_destroy (async); + async = NULL; + } + + if (sock) { + puts ("Closing PGM socket."); + pgm_close (sock, TRUE); + sock = NULL; + } + + puts ("PGM engine shutdown."); + pgm_shutdown (); + puts ("finished."); + return EXIT_SUCCESS; +} + +#ifndef _WIN32 +static +void +on_signal ( + int signum + ) +{ + printf ("on_signal (signum:%d)\n", signum); + is_terminated = TRUE; + const char one = '1'; + const size_t writelen = write (terminate_pipe[1], &one, sizeof(one)); + assert (sizeof(one) == writelen); +} +#else +static +BOOL +on_console_ctrl ( + DWORD dwCtrlType + ) +{ + printf ("on_console_ctrl (dwCtrlType:%lu)\n", (unsigned long)dwCtrlType); + is_terminated = TRUE; + SetEvent (terminate_event); + return TRUE; +} +#endif /* !_WIN32 */ + +static +bool +on_startup (void) +{ + struct pgm_addrinfo_t* res = NULL; + pgm_error_t* pgm_err = NULL; + sa_family_t sa_family = AF_UNSPEC; + +/* parse network parameter into PGM socket address structure */ + if (!pgm_getaddrinfo (network, NULL, &res, &pgm_err)) { + fprintf (stderr, "Parsing network parameter: %s\n", pgm_err->message); + goto err_abort; + } + + sa_family = res->ai_send_addrs[0].gsr_group.ss_family; + + puts ("Create PGM socket."); + if (udp_encap_port) { + if (!pgm_socket (&sock, sa_family, SOCK_SEQPACKET, IPPROTO_UDP, &pgm_err)) { + fprintf (stderr, "Creating PGM/UDP socket: %s\n", pgm_err->message); + goto err_abort; + } + pgm_setsockopt (sock, PGM_UDP_ENCAP_UCAST_PORT, &udp_encap_port, sizeof(udp_encap_port)); + pgm_setsockopt (sock, PGM_UDP_ENCAP_MCAST_PORT, &udp_encap_port, sizeof(udp_encap_port)); + } else { + if (!pgm_socket (&sock, sa_family, SOCK_SEQPACKET, IPPROTO_PGM, &pgm_err)) { + fprintf (stderr, "Creating PGM/IP socket: %s\n", pgm_err->message); + goto err_abort; + } + } + +/* Use RFC 2113 tagging for PGM Router Assist */ + const int no_router_assist = 0; + pgm_setsockopt (sock, PGM_IP_ROUTER_ALERT, &no_router_assist, sizeof(no_router_assist)); + + pgm_drop_superuser(); + +/* set PGM parameters */ + const int recv_only = 1, + passive = 0, + peer_expiry = pgm_secs (300), + spmr_expiry = pgm_msecs (250), + nak_bo_ivl = pgm_msecs (50), + nak_rpt_ivl = pgm_secs (2), + nak_rdata_ivl = pgm_secs (2), + nak_data_retries = 50, + nak_ncf_retries = 50; + + pgm_setsockopt (sock, PGM_RECV_ONLY, &recv_only, sizeof(recv_only)); + pgm_setsockopt (sock, PGM_PASSIVE, &passive, sizeof(passive)); + pgm_setsockopt (sock, PGM_MTU, &max_tpdu, sizeof(max_tpdu)); + pgm_setsockopt (sock, PGM_RXW_SQNS, &sqns, sizeof(sqns)); + pgm_setsockopt (sock, PGM_PEER_EXPIRY, &peer_expiry, sizeof(peer_expiry)); + pgm_setsockopt (sock, PGM_SPMR_EXPIRY, &spmr_expiry, sizeof(spmr_expiry)); + pgm_setsockopt (sock, PGM_NAK_BO_IVL, &nak_bo_ivl, sizeof(nak_bo_ivl)); + pgm_setsockopt (sock, PGM_NAK_RPT_IVL, &nak_rpt_ivl, sizeof(nak_rpt_ivl)); + pgm_setsockopt (sock, PGM_NAK_RDATA_IVL, &nak_rdata_ivl, sizeof(nak_rdata_ivl)); + pgm_setsockopt (sock, PGM_NAK_DATA_RETRIES, &nak_data_retries, sizeof(nak_data_retries)); + pgm_setsockopt (sock, PGM_NAK_NCF_RETRIES, &nak_ncf_retries, sizeof(nak_ncf_retries)); + if (use_fec) { + struct 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; + pgm_setsockopt (sock, PGM_USE_FEC, &fecinfo, sizeof(fecinfo)); + } + +/* create global session identifier */ + struct pgm_sockaddr_t addr; + memset (&addr, 0, sizeof(addr)); + addr.sa_port = port ? port : DEFAULT_DATA_DESTINATION_PORT; + addr.sa_addr.sport = DEFAULT_DATA_SOURCE_PORT; + if (!pgm_gsi_create_from_hostname (&addr.sa_addr.gsi, &pgm_err)) { + fprintf (stderr, "Creating GSI: %s\n", pgm_err->message); + goto err_abort; + } + +/* assign socket to specified address */ + struct pgm_interface_req_t if_req; + memset (&if_req, 0, sizeof(if_req)); + if_req.ir_interface = res->ai_recv_addrs[0].gsr_interface; + if_req.ir_scope_id = 0; + if (AF_INET6 == sa_family) { + struct sockaddr_in6 sa6; + memcpy (&sa6, &res->ai_recv_addrs[0].gsr_group, sizeof(sa6)); + if_req.ir_scope_id = sa6.sin6_scope_id; + } + if (!pgm_bind3 (sock, + &addr, sizeof(addr), + &if_req, sizeof(if_req), /* tx interface */ + &if_req, sizeof(if_req), /* rx interface */ + &pgm_err)) + { + fprintf (stderr, "Binding PGM socket: %s\n", pgm_err->message); + goto err_abort; + } + +/* join IP multicast groups */ + for (unsigned i = 0; i < res->ai_recv_addrs_len; i++) + pgm_setsockopt (sock, PGM_JOIN_GROUP, &res->ai_recv_addrs[i], sizeof(struct group_req)); + pgm_setsockopt (sock, PGM_SEND_GROUP, &res->ai_send_addrs[0], sizeof(struct group_req)); + pgm_freeaddrinfo (res); + +/* set IP parameters */ + const int nonblocking = 1, + multicast_loop = use_multicast_loop ? 1 : 0, + multicast_hops = 16, + dscp = 0x2e << 2; /* Expedited Forwarding PHB for network elements, no ECN. */ + + pgm_setsockopt (sock, PGM_MULTICAST_LOOP, &multicast_loop, sizeof(multicast_loop)); + pgm_setsockopt (sock, PGM_MULTICAST_HOPS, &multicast_hops, sizeof(multicast_hops)); + if (AF_INET6 != sa_family) + pgm_setsockopt (sock, PGM_TOS, &dscp, sizeof(dscp)); + pgm_setsockopt (sock, PGM_NOBLOCK, &nonblocking, sizeof(nonblocking)); + + if (!pgm_connect (sock, &pgm_err)) { + fprintf (stderr, "Connecting PGM socket: %s\n", pgm_err->message); + goto err_abort; + } + +/* wrap bound socket in asynchronous queue */ + if (0 != async_create (&async, sock)) { + fprintf (stderr, "Creating asynchronous queue failed: %s\n", strerror(errno)); + goto err_abort; + } + + puts ("Startup complete."); + return TRUE; + +err_abort: + if (NULL != sock) { + pgm_close (sock, FALSE); + sock = NULL; + } + if (NULL != res) { + pgm_freeaddrinfo (res); + res = NULL; + } + if (NULL != pgm_err) { + pgm_error_free (pgm_err); + pgm_err = NULL; + } + return FALSE; +} + +static +int +on_data ( + const void* restrict data, + const size_t len, + const struct pgm_sockaddr_t* restrict from + ) +{ +/* protect against non-null terminated strings */ + char buf[1024], tsi[PGM_TSISTRLEN]; + const size_t buflen = MIN(sizeof(buf) - 1, len); + strncpy (buf, (const char*)data, buflen); + buf[buflen] = '\0'; + pgm_tsi_print_r (&from->sa_addr, tsi, sizeof(tsi)); +#ifndef _MSC_VER + printf ("\"%s\" (%zu bytes from %s)\n", + buf, len, tsi); +#else +/* Microsoft CRT will crash on %zu */ + printf ("\"%s\" (%u bytes from %s)\n", + buf, (unsigned)len, tsi); +#endif + return 0; +} + +/* eof */ |