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;
41 #include <gruel/thread.h>
45 static int is_error( int perr )
47 // Compare error to posix error code; return nonzero if match.
48 #if defined(USING_WINSOCK)
49 #define ENOPROTOOPT 109
50 #define ECONNREFUSED 111
51 // All codes to be checked for must be defined below
52 int werr = WSAGetLastError();
55 return( perr == EAGAIN );
57 return( perr == ENOPROTOOPT );
59 return( perr == ECONNREFUSED );
61 fprintf(stderr,"gr_udp_source/is_error: unknown error %d\n", perr );
62 throw std::runtime_error("internal error");
66 return( perr == errno );
70 static void report_error( const char *msg1, const char *msg2 )
72 // Deal with errors, both posix and winsock
73 #if defined(USING_WINSOCK)
74 int werr = WSAGetLastError();
75 fprintf(stderr, "%s: winsock error %d\n", msg1, werr );
80 throw std::runtime_error(msg2);
84 gr_udp_sink::gr_udp_sink (size_t itemsize,
85 const char *src, unsigned short port_src,
86 const char *dst, unsigned short port_dst,
88 : gr_sync_block ("udp_sink",
89 gr_make_io_signature (1, 1, itemsize),
90 gr_make_io_signature (0, 0, 0)),
91 d_itemsize (itemsize), d_updated(false), d_payload_size(payload_size)
95 #if !defined(HAVE_SOCKET) // for Windows (with MinGW)
96 // initialize winsock DLL
98 int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
99 if( iResult != NO_ERROR ) {
100 report_error( "gr_udp_source WSAStartup", "can't open socket" );
104 // Set up the address stucture for the source address and port numbers
105 // Get the source IP address from the host name
106 struct addrinfo hints;
107 memset( (void*)&hints, 0, sizeof(hints) );
108 hints.ai_family = AF_INET;
109 hints.ai_socktype = SOCK_DGRAM;
110 hints.ai_protocol = IPPROTO_UDP;
112 sprintf( port_str, "%d", port_src );
113 ret = getaddrinfo( src, port_str, &hints, &d_ip_src );
115 report_error("gr_udp_source/getaddrinfo",
116 "can't initialize source socket" );
118 // Get the destination IP address from the host name
119 sprintf( port_str, "%d", port_dst );
120 ret = getaddrinfo( dst, port_str, &hints, &d_ip_dst );
122 report_error("gr_udp_source/getaddrinfo",
123 "can't initialize destination socket" );
128 // public constructor that returns a shared_ptr
131 gr_make_udp_sink (size_t itemsize,
132 const char *src, unsigned short port_src,
133 const char *dst, unsigned short port_dst,
136 return gr_udp_sink_sptr (new gr_udp_sink (itemsize,
142 gr_udp_sink::~gr_udp_sink ()
144 freeaddrinfo(d_ip_src);
145 freeaddrinfo(d_ip_dst);
148 #if !defined(HAVE_SOCKET) // for Windows (with MinGW)
149 // free winsock resources
157 gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
160 d_socket = socket(d_ip_src->ai_family, d_ip_src->ai_socktype,
161 d_ip_src->ai_protocol);
163 report_error("socket open","can't open socket");
166 // Turn on reuse address
168 if(setsockopt(d_socket, SOL_SOCKET, SO_REUSEADDR, (optval_t)&opt_val, sizeof(int)) == -1) {
169 report_error("SO_REUSEADDR","can't set socket option SO_REUSEADDR");
172 // Don't wait when shutting down
176 if(setsockopt(d_socket, SOL_SOCKET, SO_LINGER, (optval_t)&lngr, sizeof(linger)) == -1) {
177 if( !is_error(ENOPROTOOPT) ) { // no SO_LINGER for SOCK_DGRAM on Windows
178 report_error("SO_LINGER","can't set socket option SO_LINGER");
182 // bind socket to an address and port number to listen on
183 if(bind (d_socket, d_ip_src->ai_addr, d_ip_src->ai_addrlen) == -1) {
184 report_error("socket bind","can't bind socket");
187 // Not sure if we should throw here or allow retries
188 if(connect(d_socket, d_ip_dst->ai_addr, d_ip_dst->ai_addrlen) == -1) {
189 report_error("socket connect","can't connect to socket");
193 return d_socket != 0;
199 gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
202 shutdown(d_socket, SHUT_RDWR);
203 #if defined(USING_WINSOCK)
204 closesocket(d_socket);
214 gr_udp_sink::work (int noutput_items,
215 gr_vector_const_void_star &input_items,
216 gr_vector_void_star &output_items)
218 const char *in = (const char *) input_items[0];
219 ssize_t r=0, bytes_sent=0, bytes_to_send=0;
220 ssize_t total_size = noutput_items*d_itemsize;
223 printf("Entered udp_sink\n");
226 while(bytes_sent < total_size) {
227 bytes_to_send = std::min((ssize_t)d_payload_size, (total_size-bytes_sent));
229 r = send(d_socket, (in+bytes_sent), bytes_to_send, 0);
230 if(r == -1) { // error on send command
231 if( is_error(ECONNREFUSED) )
232 r = bytes_to_send; // discard data until receiver is started
234 report_error("udp_sink",NULL); // there should be no error case where
235 return -1; // this function should not exit immediately
241 printf("\tbyte sent: %d bytes\n", bytes);
246 printf("Sent: %d bytes (noutput_items: %d)\n", bytes_sent, noutput_items);
249 return noutput_items;