3 * Copyright 2007,2008,2009 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
26 #include <gr_udp_sink.h>
27 #include <gr_io_signature.h>
32 #if defined(HAVE_NETDB_H)
33 typedef void* optval_t;
35 // if not posix, assume winsock
38 typedef char* optval_t;
39 #define ENOPROTOOPT 109
42 #include <gruel/thread.h>
46 static int is_error( int perr )
48 // Compare error to posix error code; return nonzero if match.
49 #if defined(USING_WINSOCK)
50 // All codes to be checked for must be defined below
51 int werr = WSAGetLastError();
54 return( perr == EAGAIN );
56 return( perr == ENOPROTOOPT );
58 fprintf(stderr,"gr_udp_source/is_error: unknown error %d\n", perr );
59 throw std::runtime_error("internal error");
63 return( perr == errno );
67 static void report_error( char *msg1, char *msg2 )
69 // Deal with errors, both posix and winsock
70 #if defined(USING_WINSOCK)
71 int werr = WSAGetLastError();
72 fprintf(stderr, "%s: winsock error %d\n", msg1, werr );
77 throw std::runtime_error(msg2);
81 gr_udp_sink::gr_udp_sink (size_t itemsize,
82 const char *src, unsigned short port_src,
83 const char *dst, unsigned short port_dst,
85 : gr_sync_block ("udp_sink",
86 gr_make_io_signature (1, 1, itemsize),
87 gr_make_io_signature (0, 0, 0)),
88 d_itemsize (itemsize), d_updated(false), d_payload_size(payload_size)
92 #if !defined(HAVE_SOCKET) // for Windows (with MinGW)
93 // initialize winsock DLL
95 int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
96 if( iResult != NO_ERROR ) {
97 report_error( "gr_udp_source WSAStartup", "can't open socket" );
101 // Set up the address stucture for the source address and port numbers
102 // Get the source IP address from the host name
103 struct addrinfo hints;
104 memset( (void*)&hints, 0, sizeof(hints) );
105 hints.ai_family = AF_INET;
106 hints.ai_socktype = SOCK_DGRAM;
107 hints.ai_protocol = IPPROTO_UDP;
109 sprintf( port_str, "%d", port_src );
110 ret = getaddrinfo( src, port_str, &hints, &d_ip_src );
112 report_error("gr_udp_source/getaddrinfo",
113 "can't initialize source socket" );
115 // Get the destination IP address from the host name
116 sprintf( port_str, "%d", port_dst );
117 ret = getaddrinfo( dst, port_str, &hints, &d_ip_dst );
119 report_error("gr_udp_source/getaddrinfo",
120 "can't initialize destination socket" );
125 // public constructor that returns a shared_ptr
128 gr_make_udp_sink (size_t itemsize,
129 const char *src, unsigned short port_src,
130 const char *dst, unsigned short port_dst,
133 return gr_udp_sink_sptr (new gr_udp_sink (itemsize,
139 gr_udp_sink::~gr_udp_sink ()
141 freeaddrinfo(d_ip_src);
142 freeaddrinfo(d_ip_dst);
145 #if !defined(HAVE_SOCKET) // for Windows (with MinGW)
146 // free winsock resources
154 gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
157 d_socket = socket(d_ip_src->ai_family, d_ip_src->ai_socktype,
158 d_ip_src->ai_protocol);
160 report_error("socket open","can't open socket");
163 // Turn on reuse address
165 if(setsockopt(d_socket, SOL_SOCKET, SO_REUSEADDR, (optval_t)&opt_val, sizeof(int)) == -1) {
166 report_error("SO_REUSEADDR","can't set socket option SO_REUSEADDR");
169 // Don't wait when shutting down
173 if(setsockopt(d_socket, SOL_SOCKET, SO_LINGER, (optval_t)&lngr, sizeof(linger)) == -1) {
174 if( !is_error(ENOPROTOOPT) ) { // no SO_LINGER for SOCK_DGRAM on Windows
175 report_error("SO_LINGER","can't set socket option SO_LINGER");
179 // bind socket to an address and port number to listen on
180 if(bind (d_socket, d_ip_src->ai_addr, d_ip_src->ai_addrlen) == -1) {
181 report_error("socket bind","can't bind socket");
184 // Not sure if we should throw here or allow retries
185 if(connect(d_socket, d_ip_dst->ai_addr, d_ip_dst->ai_addrlen) == -1) {
186 report_error("socket connect","can't connect to socket");
190 return d_socket != 0;
196 gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
199 shutdown(d_socket, SHUT_RDWR);
200 #if defined(USING_WINSOCK)
201 closesocket(d_socket);
211 gr_udp_sink::work (int noutput_items,
212 gr_vector_const_void_star &input_items,
213 gr_vector_void_star &output_items)
215 const char *in = (const char *) input_items[0];
216 ssize_t r=0, bytes_sent=0, bytes_to_send=0;
217 ssize_t total_size = noutput_items*d_itemsize;
220 printf("Entered upd_sink\n");
223 while(bytes_sent < total_size) {
224 bytes_to_send = std::min((ssize_t)d_payload_size, (total_size-bytes_sent));
226 r = send(d_socket, (in+bytes_sent), bytes_to_send, 0);
227 if(r == -1) { // error on send command
228 report_error("udp_sink",NULL); // there should be no error case where
229 return -1; // this function should not exit immediately
234 printf("\tbyte sent: %d bytes\n", bytes);
239 printf("Sent: %d bytes (noutput_items: %d)\n", bytes_sent, noutput_items);
242 return noutput_items;