/* -*- c++ -*- */
/*
- * Copyright 2007,2008,2009 Free Software Foundation, Inc.
+ * Copyright 2007,2008,2009,2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
#include <errno.h>
#include <stdio.h>
#include <string.h>
-#if defined(HAVE_SOCKET)
+
+#if defined(HAVE_NETDB_H)
#include <netdb.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
typedef void* optval_t;
-#else
+
+// ntohs() on FreeBSD may require both netinet/in.h and arpa/inet.h, in order
+#if defined(HAVE_NETINET_IN_H)
+#include <netinet/in.h>
+#endif
+#if defined(HAVE_ARPA_INET_H)
+#include <arpa/inet.h>
+#endif
+
+#elif defined(HAVE_WINDOWS_H)
+// if not posix, assume winsock
+#define USING_WINSOCK
+#include <winsock2.h>
+#include <ws2tcpip.h>
#define SHUT_RDWR 2
-#define inet_aton(N,A) ( (A)->s_addr = inet_addr(N), ( (A)->s_addr != INADDR_NONE ) )
typedef char* optval_t;
#endif
+#define USE_SELECT 1 // non-blocking receive on all platforms
+#define USE_RCV_TIMEO 0 // non-blocking receive on all but Cygwin
#define SRC_VERBOSE 0
-gr_udp_source::gr_udp_source(size_t itemsize, const char *src,
- unsigned short port_src, int payload_size)
+static int is_error( int perr )
+{
+ // Compare error to posix error code; return nonzero if match.
+#if defined(USING_WINSOCK)
+#define ENOPROTOOPT 109
+ // All codes to be checked for must be defined below
+ int werr = WSAGetLastError();
+ switch( werr ) {
+ case WSAETIMEDOUT:
+ return( perr == EAGAIN );
+ case WSAENOPROTOOPT:
+ return( perr == ENOPROTOOPT );
+ default:
+ fprintf(stderr,"gr_udp_source/is_error: unknown error %d\n", perr );
+ throw std::runtime_error("internal error");
+ }
+ return 0;
+#else
+ return( perr == errno );
+#endif
+}
+
+static void report_error( const char *msg1, const char *msg2 )
+{
+ // Deal with errors, both posix and winsock
+#if defined(USING_WINSOCK)
+ int werr = WSAGetLastError();
+ fprintf(stderr, "%s: winsock error %d\n", msg1, werr );
+#else
+ perror(msg1);
+#endif
+ if( msg2 != NULL )
+ throw std::runtime_error(msg2);
+ return;
+}
+
+gr_udp_source::gr_udp_source(size_t itemsize, const char *host,
+ unsigned short port, int payload_size,
+ bool eof, bool wait)
: gr_sync_block ("udp_source",
gr_make_io_signature(0, 0, 0),
gr_make_io_signature(1, 1, itemsize)),
- d_itemsize(itemsize), d_updated(false), d_payload_size(payload_size), d_residual(0), d_temp_offset(0)
+ d_itemsize(itemsize), d_payload_size(payload_size),
+ d_eof(eof), d_wait(wait), d_socket(-1), d_residual(0), d_temp_offset(0)
{
int ret = 0;
+
+#if defined(USING_WINSOCK) // for Windows (with MinGW)
+ // initialize winsock DLL
+ WSADATA wsaData;
+ int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
+ if( iResult != NO_ERROR ) {
+ report_error( "gr_udp_source WSAStartup", "can't open socket" );
+ }
+#endif
// Set up the address stucture for the source address and port numbers
// Get the source IP address from the host name
- struct hostent *hsrc = gethostbyname(src);
- if(hsrc) { // if the source was provided as a host namex
- d_ip_src = *(struct in_addr*)hsrc->h_addr_list[0];
- }
- else { // assume it was specified as an IP address
- if((ret=inet_aton(src, &d_ip_src)) == 0) { // format IP address
- perror("Not a valid source IP address or host name");
- throw std::runtime_error("can't initialize source socket");
- }
- }
+ struct addrinfo *ip_src; // store the source IP address to use
+ struct addrinfo hints;
+ memset( (void*)&hints, 0, sizeof(hints) );
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = IPPROTO_UDP;
+ hints.ai_flags = AI_PASSIVE;
+ char port_str[12];
+ sprintf( port_str, "%d", port );
- d_port_src = htons(port_src); // format port number
-
- d_sockaddr_src.sin_family = AF_INET;
- d_sockaddr_src.sin_addr = d_ip_src;
- d_sockaddr_src.sin_port = d_port_src;
+ // FIXME leaks if report_error throws below
+ ret = getaddrinfo( host, port_str, &hints, &ip_src );
+ if( ret != 0 )
+ report_error("gr_udp_source/getaddrinfo",
+ "can't initialize source socket" );
+ // FIXME leaks if report_error throws below
d_temp_buff = new char[d_payload_size]; // allow it to hold up to payload_size bytes
-
- open();
-}
-gr_udp_source_sptr
-gr_make_udp_source (size_t itemsize, const char *ipaddr,
- unsigned short port, int payload_size)
-{
- return gr_udp_source_sptr (new gr_udp_source (itemsize, ipaddr,
- port, payload_size));
-}
-
-gr_udp_source::~gr_udp_source ()
-{
- delete [] d_temp_buff;
- close();
-}
-
-bool
-gr_udp_source::open()
-{
- gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
// create socket
- d_socket = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ d_socket = socket(ip_src->ai_family, ip_src->ai_socktype,
+ ip_src->ai_protocol);
if(d_socket == -1) {
- perror("socket open");
- throw std::runtime_error("can't open socket");
+ report_error("socket open","can't open socket");
}
// Turn on reuse address
int opt_val = 1;
if(setsockopt(d_socket, SOL_SOCKET, SO_REUSEADDR, (optval_t)&opt_val, sizeof(int)) == -1) {
- perror("SO_REUSEADDR");
- throw std::runtime_error("can't set socket option SO_REUSEADDR");
+ report_error("SO_REUSEADDR","can't set socket option SO_REUSEADDR");
}
// Don't wait when shutting down
lngr.l_onoff = 1;
lngr.l_linger = 0;
if(setsockopt(d_socket, SOL_SOCKET, SO_LINGER, (optval_t)&lngr, sizeof(linger)) == -1) {
- perror("SO_LINGER");
- throw std::runtime_error("can't set socket option SO_LINGER");
+ if( !is_error(ENOPROTOOPT) ) { // no SO_LINGER for SOCK_DGRAM on Windows
+ report_error("SO_LINGER","can't set socket option SO_LINGER");
+ }
}
+#if USE_RCV_TIMEO
// Set a timeout on the receive function to not block indefinitely
// This value can (and probably should) be changed
+ // Ignored on Cygwin
+#if defined(USING_WINSOCK)
+ DWORD timeout = 1000; // milliseconds
+#else
timeval timeout;
timeout.tv_sec = 1;
timeout.tv_usec = 0;
+#endif
if(setsockopt(d_socket, SOL_SOCKET, SO_RCVTIMEO, (optval_t)&timeout, sizeof(timeout)) == -1) {
- perror("SO_RCVTIMEO");
- throw std::runtime_error("can't set socket option SO_RCVTIMEO");
+ report_error("SO_RCVTIMEO","can't set socket option SO_RCVTIMEO");
}
+#endif // USE_RCV_TIMEO
// bind socket to an address and port number to listen on
- if(bind (d_socket, (sockaddr*)&d_sockaddr_src, sizeof(struct sockaddr)) == -1) {
- perror("socket bind");
- throw std::runtime_error("can't bind socket");
+ if(bind (d_socket, ip_src->ai_addr, ip_src->ai_addrlen) == -1) {
+ report_error("socket bind","can't bind socket");
}
-
- d_updated = true;
- return d_socket != 0;
+ freeaddrinfo(ip_src);
+
}
-void
-gr_udp_source::close()
+gr_udp_source_sptr
+gr_make_udp_source (size_t itemsize, const char *ipaddr,
+ unsigned short port, int payload_size, bool eof, bool wait)
{
- gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
+ return gr_udp_source_sptr (new gr_udp_source (itemsize, ipaddr,
+ port, payload_size, eof, wait));
+}
+
+gr_udp_source::~gr_udp_source ()
+{
+ delete [] d_temp_buff;
- if (d_socket){
+ if (d_socket != -1){
shutdown(d_socket, SHUT_RDWR);
- d_socket = 0;
+#if defined(USING_WINSOCK)
+ closesocket(d_socket);
+#else
+ ::close(d_socket);
+#endif
+ d_socket = -1;
}
- d_updated = true;
+
+#if defined(USING_WINSOCK) // for Windows (with MinGW)
+ // free winsock resources
+ WSACleanup();
+#endif
}
int
// Update indexing of amount of bytes left in the buffer
d_residual -= nbytes;
- d_temp_offset = d_temp_offset+d_residual;
+ d_temp_offset += nbytes;
+
+ // Return now with what we've got.
+ assert(nbytes % d_itemsize == 0);
+ return nbytes/d_itemsize;
}
while(1) {
// get the data into our output buffer and record the number of bytes
+
+#if USE_SELECT
+ // RCV_TIMEO doesn't work on all systems (e.g., Cygwin)
+ // use select() instead of, or in addition to RCV_TIMEO
+ fd_set readfds;
+ timeval timeout;
+ timeout.tv_sec = 1; // Init timeout each iteration. Select can modify it.
+ timeout.tv_usec = 0;
+ FD_ZERO(&readfds);
+ FD_SET(d_socket, &readfds);
+ r = select(FD_SETSIZE, &readfds, NULL, NULL, &timeout);
+ if(r < 0) {
+ report_error("udp_source/select",NULL);
+ return -1;
+ }
+ else if(r == 0 ) { // timed out
+ if( d_wait ) {
+ // Allow boost thread interrupt, then try again
+ boost::this_thread::interruption_point();
+ continue;
+ }
+ else
+ return -1;
+ }
+#endif // USE_SELECT
+
// This is a non-blocking call with a timeout set in the constructor
r = recv(d_socket, d_temp_buff, d_payload_size, 0); // get the entire payload or the what's available
+ // If r > 0, round it down to a multiple of d_itemsize
+ // (If sender is broken, don't propagate problem)
+ if (r > 0)
+ r = (r/d_itemsize) * d_itemsize;
+
// Check if there was a problem; forget it if the operation just timed out
if(r == -1) {
- if(errno == EAGAIN) { // handle non-blocking call timeout
+ if( is_error(EAGAIN) ) { // handle non-blocking call timeout
#if SRC_VERBOSE
printf("UDP receive timed out\n");
#endif
- // Break here to allow the rest of the flow graph time to run and so ctrl-C breaks
- break;
+ if( d_wait ) {
+ // Allow boost thread interrupt, then try again
+ boost::this_thread::interruption_point();
+ continue;
+ }
+ else
+ return -1;
}
else {
- perror("udp_source");
+ report_error("udp_source/recv",NULL);
return -1;
}
}
+ else if(r==0) {
+ if(d_eof) {
+ // zero-length packet interpreted as EOF
+
+ #if SNK_VERBOSE
+ printf("\tzero-length packet received; returning EOF\n");
+ #endif
+
+ return -1;
+ }
+ else{
+ // do we need to allow boost thread interrupt?
+ boost::this_thread::interruption_point();
+ continue;
+ }
+ }
else {
// Calculate the number of bytes we can take from the buffer in this call
nbytes = std::min(r, total_bytes-bytes_received);
return bytes_received/d_itemsize;
}
+// Return port number of d_socket
+int gr_udp_source::get_port(void)
+{
+ sockaddr_in name;
+ socklen_t len = sizeof(name);
+ int ret = getsockname( d_socket, (sockaddr*)&name, &len );
+ if( ret ) {
+ report_error("gr_udp_source/getsockname",NULL);
+ return -1;
+ }
+ return ntohs(name.sin_port);
+}
projects / debian / gnuradio / blobdiff