AC_ENABLE_SHARED dnl do build shared libraries
AC_DISABLE_STATIC dnl don't build static libraries
m4_ifdef([LT_INIT],[LT_INIT],[AC_PROG_LIBTOOL])
-GR_FORTRAN
+dnl GR_FORTRAN
GR_NO_UNDEFINED dnl do we need the -no-undefined linker flag
GR_SCRIPTING
AC_CHECK_HEADERS(fcntl.h limits.h strings.h time.h sys/ioctl.h sys/time.h unistd.h)
AC_CHECK_HEADERS(linux/ppdev.h dev/ppbus/ppi.h sys/mman.h sys/select.h sys/types.h)
AC_CHECK_HEADERS(sys/resource.h stdint.h sched.h signal.h sys/syscall.h malloc.h)
- AC_CHECK_HEADERS(netinet/in.h)
AC_CHECK_HEADERS(windows.h)
AC_CHECK_HEADERS(vec_types.h)
+ AC_CHECK_HEADERS(netdb.h netinet/in.h arpa/inet.h sys/types.h sys/socket.h)
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
GRC_GNURADIO_CORE
GRC_USRP
GRC_USRP2
-GRC_VRT
GRC_GR_USRP dnl this must come after GRC_USRP
GRC_GR_USRP2
GRC_GR_GCELL dnl this must come after GRC_GCELL and GRC_GNURADIO_CORE
/* -*- 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 <gr_udp_sink.h>
#include <gr_io_signature.h>
#include <stdexcept>
- #if defined(HAVE_SOCKET)
- #include <netdb.h>
+ #include <errno.h>
#include <stdio.h>
+ #include <string.h>
+ #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> //usually included by <netdb.h>?
+ #endif
typedef void* optval_t;
- #else
+ #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 SNK_VERBOSE 0
- gr_udp_sink::gr_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size)
- : gr_sync_block ("udp_sink",
- gr_make_io_signature (1, 1, itemsize),
- gr_make_io_signature (0, 0, 0)),
- d_itemsize (itemsize), d_updated(false), d_payload_size(payload_size)
+ static int is_error( int perr )
{
- int ret = 0;
-
- // 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];
+ // Compare error to posix error code; return nonzero if match.
+ #if defined(USING_WINSOCK)
+ #define ENOPROTOOPT 109
+ #define ECONNREFUSED 111
+ // 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 );
+ case WSAECONNREFUSED:
+ return( perr == ECONNREFUSED );
+ default:
+ fprintf(stderr,"gr_udp_source/is_error: unknown error %d\n", perr );
+ throw std::runtime_error("internal error");
}
- 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");
- }
- }
-
- // Get the destination IP address from the host name
- struct hostent *hdst = gethostbyname(dst);
- if(hdst) { // if the source was provided as a host namex
- d_ip_dst = *(struct in_addr*)hdst->h_addr_list[0];
- }
- else { // assume it was specified as an IP address
- if((ret=inet_aton(dst, &d_ip_dst)) == 0) { // format IP address
- perror("Not a valid destination IP address or host name");
- throw std::runtime_error("can't initialize destination socket");
- }
- }
-
- d_port_src = htons(port_src); // format port number
- d_port_dst = htons(port_dst); // 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;
-
- d_sockaddr_dst.sin_family = AF_INET;
- d_sockaddr_dst.sin_addr = d_ip_dst;
- d_sockaddr_dst.sin_port = d_port_dst;
-
- open();
- }
-
- // public constructor that returns a shared_ptr
-
- gr_udp_sink_sptr
- gr_make_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size)
- {
- return gr_udp_sink_sptr (new gr_udp_sink (itemsize,
- src, port_src,
- dst, port_dst,
- payload_size));
+ return 0;
+ #else
+ return( perr == errno );
+ #endif
}
- gr_udp_sink::~gr_udp_sink ()
+ static void report_error( const char *msg1, const char *msg2 )
{
- close();
+ // 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;
}
- bool
- gr_udp_sink::open()
+ gr_udp_sink::gr_udp_sink (size_t itemsize,
+ const char *host, unsigned short port,
+ int payload_size, bool eof)
+ : gr_sync_block ("udp_sink",
+ gr_make_io_signature (1, 1, itemsize),
+ gr_make_io_signature (0, 0, 0)),
+ d_itemsize (itemsize), d_payload_size(payload_size), d_eof(eof),
+ d_socket(-1), d_connected(false)
{
- gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
-
- // create socket
- if((d_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
- perror("socket open");
- throw std::runtime_error("can't open socket");
+ #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
- // Turn on reuse address
- int opt_val = true;
- 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");
+ // create socket
+ d_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if(d_socket == -1) {
+ report_error("socket open","can't open socket");
}
// 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");
+ }
}
- // 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");
- }
+ // Get the destination address
+ connect(host, port);
+ }
- // Not sure if we should throw here or allow retries
- if(connect(d_socket, (sockaddr*)&d_sockaddr_dst, sizeof(struct sockaddr)) == -1) {
- perror("socket connect");
- throw std::runtime_error("can't connect to socket");
- }
+ // public constructor that returns a shared_ptr
- d_updated = true;
- return d_socket != 0;
+ gr_udp_sink_sptr
+ gr_make_udp_sink (size_t itemsize,
+ const char *host, unsigned short port,
+ int payload_size, bool eof)
+ {
+ return gr_udp_sink_sptr (new gr_udp_sink (itemsize,
+ host, port,
+ payload_size, eof));
}
- void
- gr_udp_sink::close()
+ gr_udp_sink::~gr_udp_sink ()
{
- gruel::scoped_lock guard(d_mutex); // hold mutex for duration of this function
+ if (d_connected)
+ disconnect();
- 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
ssize_t total_size = noutput_items*d_itemsize;
#if SNK_VERBOSE
- printf("Entered upd_sink\n");
+ printf("Entered udp_sink\n");
#endif
+ gruel::scoped_lock guard(d_mutex); // protect d_socket
+
while(bytes_sent < total_size) {
bytes_to_send = std::min((ssize_t)d_payload_size, (total_size-bytes_sent));
- r = send(d_socket, (in+bytes_sent), bytes_to_send, 0);
- if(r == -1) { // error on send command
- perror("udp_sink"); // there should be no error case where this function
- return -1; // should not exit immediately
+ if(d_connected) {
+ r = send(d_socket, (in+bytes_sent), bytes_to_send, 0);
+ if(r == -1) { // error on send command
+ if( is_error(ECONNREFUSED) )
+ r = bytes_to_send; // discard data until receiver is started
+ else {
+ report_error("udp_sink",NULL); // there should be no error case where
+ return -1; // this function should not exit immediately
+ }
+ }
}
+ else
+ r = bytes_to_send; // discarded for lack of connection
bytes_sent += r;
#if SNK_VERBOSE
- printf("\tbyte sent: %d bytes\n", bytes);
+ printf("\tbyte sent: %d bytes\n", r);
#endif
}
return noutput_items;
}
+
+ void gr_udp_sink::connect( const char *host, unsigned short port )
+ {
+ if(d_connected)
+ disconnect();
+
+ if(host != NULL ) {
+ // Get the destination address
+ struct addrinfo *ip_dst;
+ struct addrinfo hints;
+ memset( (void*)&hints, 0, sizeof(hints) );
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = IPPROTO_UDP;
+ char port_str[12];
+ sprintf( port_str, "%d", port );
+
+ // FIXME leaks if report_error throws below
+ int ret = getaddrinfo( host, port_str, &hints, &ip_dst );
+ if( ret != 0 )
+ report_error("gr_udp_source/getaddrinfo",
+ "can't initialize destination socket" );
+
+ // don't need d_mutex lock when !d_connected
+ if(::connect(d_socket, ip_dst->ai_addr, ip_dst->ai_addrlen) == -1) {
+ report_error("socket connect","can't connect to socket");
+ }
+ d_connected = true;
+
+ freeaddrinfo(ip_dst);
+ }
+
+ return;
+ }
+
+ void gr_udp_sink::disconnect()
+ {
+ if(!d_connected)
+ return;
+
+ #if SNK_VERBOSE
+ printf("gr_udp_sink disconnecting\n");
+ #endif
+
+ gruel::scoped_lock guard(d_mutex); // protect d_socket from work()
+
+ // Send a few zero-length packets to signal receiver we are done
+ if(d_eof) {
+ int i;
+ for( i = 0; i < 3; i++ )
+ (void) send( d_socket, NULL, 0, 0 ); // ignore errors
+ }
+
+ // Sending EOF can produce ERRCONNREFUSED errors that won't show up
+ // until the next send or recv, which might confuse us if it happens
+ // on a new connection. The following does a nonblocking recv to
+ // clear any such errors.
+ timeval timeout;
+ timeout.tv_sec = 0; // zero time for immediate return
+ timeout.tv_usec = 0;
+ fd_set readfds;
+ FD_ZERO(&readfds);
+ FD_SET(d_socket, &readfds);
+ int r = select(FD_SETSIZE, &readfds, NULL, NULL, &timeout);
+ if(r < 0) {
+ #if SNK_VERBOSE
+ report_error("udp_sink/select",NULL);
+ #endif
+ }
+ else if(r > 0) { // call recv() to get error return
+ r = recv(d_socket, (char*)&readfds, sizeof(readfds), 0);
+ if(r < 0) {
+ #if SNK_VERBOSE
+ report_error("udp_sink/recv",NULL);
+ #endif
+ }
+ }
+
+ // Since I can't find any way to disconnect a datagram socket in Cygwin,
+ // we just leave it connected but disable sending.
+ #if 0
+ // zeroed address structure should reset connection
+ struct sockaddr addr;
+ memset( (void*)&addr, 0, sizeof(addr) );
+ // addr.sa_family = AF_UNSPEC; // doesn't work on Cygwin
+ // addr.sa_family = AF_INET; // doesn't work on Cygwin
+
+ if(::connect(d_socket, &addr, sizeof(addr)) == -1)
+ report_error("socket connect","can't connect to socket");
+ #endif
+
+ d_connected = false;
+
+ return;
+ }
/* -*- 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
*
#define INCLUDED_GR_UDP_SINK_H
#include <gr_sync_block.h>
- #include <boost/thread.hpp>
- #if defined(HAVE_SOCKET)
- #include <sys/socket.h>
- #include <arpa/inet.h>
- #elif defined(HAVE_WINDOWS_H)
- #include <winsock2.h>
- #include <windows.h>
- #endif
- #if defined(HAVE_NETINET_IN_H)
- #include <netinet/in.h>
- #endif
-
#include <gruel/thread.h>
class gr_udp_sink;
gr_udp_sink_sptr
gr_make_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size=1472);
+ const char *host, unsigned short port,
+ int payload_size=1472, bool eof=true);
/*!
* \brief Write stream to an UDP socket.
* \ingroup sink_blk
*
* \param itemsize The size (in bytes) of the item datatype
- * \param src The source address as either the host name or the 'numbers-and-dots'
- * IP address
- * \param port_src Destination port to bind to (0 allows socket to choose an appropriate port)
- * \param dst The destination address as either the host name or the 'numbers-and-dots'
- * IP address
- * \param port_dst Destination port to connect to
- * \param payload_size UDP payload size by default set to
- * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param host The name or IP address of the receiving host; use
+ * NULL or None for no connection
+ * \param port Destination port to connect to on receiving host
+ * \param payload_size UDP payload size by default set to 1472 =
+ * (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param eof Send zero-length packet on disconnect
*/
class gr_udp_sink : public gr_sync_block
{
friend gr_udp_sink_sptr gr_make_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size);
+ const char *host,
+ unsigned short port,
+ int payload_size, bool eof);
private:
size_t d_itemsize;
- bool d_updated;
- gruel::mutex d_mutex;
- int d_payload_size; // maximum transmission unit (packet length)
- int d_socket; // handle to socket
- int d_socket_rcv; // handle to socket retuned in the accept call
- struct in_addr d_ip_src; // store the source ip info
- struct in_addr d_ip_dst; // store the destination ip info
- unsigned short d_port_src; // the port number to open for connections to this service
- unsigned short d_port_dst; // port number of the remove system
- struct sockaddr_in d_sockaddr_src; // store the source sockaddr data (formatted IP address and port number)
- struct sockaddr_in d_sockaddr_dst; // store the destination sockaddr data (formatted IP address and port number)
+ int d_payload_size; // maximum transmission unit (packet length)
+ bool d_eof; // send zero-length packet on disconnect
+ int d_socket; // handle to socket
+ bool d_connected; // are we connected?
+ gruel::mutex d_mutex; // protects d_socket and d_connected
protected:
/*!
* \brief UDP Sink Constructor
*
* \param itemsize The size (in bytes) of the item datatype
- * \param src The source address as either the host name or the 'numbers-and-dots'
- * IP address
- * \param port_src Destination port to bind to (0 allows socket to choose an appropriate port)
- * \param dst The destination address as either the host name or the 'numbers-and-dots'
- * IP address
- * \param port_dst Destination port to connect to
+ * \param host The name or IP address of the receiving host; use
+ * NULL or None for no connection
+ * \param port Destination port to connect to on receiving host
* \param payload_size UDP payload size by default set to
* 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param eof Send zero-length packet on disconnect
*/
gr_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size);
+ const char *host, unsigned short port,
+ int payload_size, bool eof);
public:
~gr_udp_sink ();
- /*!
- * \brief open a socket specified by the port and ip address info
- *
- * Opens a socket, binds to the address, and makes connectionless association
- * over UDP. If any of these fail, the fuction retuns the error and exits.
- */
- bool open();
+ /*! \brief return the PAYLOAD_SIZE of the socket */
+ int payload_size() { return d_payload_size; }
- /*!
- * \brief Close current socket.
+ /*! \brief Change the connection to a new destination
+ *
+ * \param host The name or IP address of the receiving host; use
+ * NULL or None to break the connection without closing
+ * \param port Destination port to connect to on receiving host
*
- * Shuts down read/write on the socket
+ * Calls disconnect() to terminate any current connection first.
*/
- void close();
+ void connect( const char *host, unsigned short port );
- /*! \brief return the PAYLOAD_SIZE of the socket */
- int payload_size() { return d_payload_size; }
+ /*! \brief Send zero-length packet (if eof is requested) then stop sending
+ *
+ * Zero-byte packets can be interpreted as EOF by gr_udp_source. Note that
+ * disconnect occurs automatically when the sink is destroyed, but not when
+ * its top_block stops.*/
+ void disconnect();
// should we export anything else?
/* -*- c++ -*- */
/*
- * Copyright 2007 Free Software Foundation, Inc.
+ * Copyright 2007,2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
gr_udp_sink_sptr
gr_make_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size=1472);
+ const char *host, unsigned short port,
+ int payload_size=1472, bool eof=true) throw (std::runtime_error);
class gr_udp_sink : public gr_sync_block
{
protected:
gr_udp_sink (size_t itemsize,
- const char *src, unsigned short port_src,
- const char *dst, unsigned short port_dst,
- int payload_size);
-
- bool open();
- void close();
- int payload_size() { return d_payload_size; }
+ const char *host, unsigned short port,
+ int payload_size, bool eof)
+ throw (std::runtime_error);
public:
~gr_udp_sink ();
+
+ int payload_size() { return d_payload_size; }
+ void connect( const char *host, unsigned short port );
+ void disconnect();
+
};
/* -*- 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);
+ }
/* -*- 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
*
#define INCLUDED_GR_UDP_SOURCE_H
#include <gr_sync_block.h>
- #if defined(HAVE_SOCKET)
- #include <sys/socket.h>
- #include <arpa/inet.h>
- #elif defined(HAVE_WINDOWS_H)
- #include <winsock2.h>
- #include <windows.h>
- #endif
- #if defined(HAVE_NETINET_IN_H)
- #include <netinet/in.h>
- #endif
-
#include <gruel/thread.h>
class gr_udp_source;
typedef boost::shared_ptr<gr_udp_source> gr_udp_source_sptr;
- gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
- unsigned short port_src, int payload_size=1472);
+ gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *host,
+ unsigned short port,
+ int payload_size=1472,
+ bool eof=true, bool wait=true);
/*!
* \brief Read stream from an UDP socket.
* \ingroup source_blk
*
* \param itemsize The size (in bytes) of the item datatype
- * \param src The source address as either the host name or the 'numbers-and-dots'
- * IP address
- * \param port_src The port number on which the socket listens for data
- * \param payload_size UDP payload size by default set to
- * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param host The name or IP address of the receiving host; can be
+ * NULL, None, or "0.0.0.0" to allow reading from any
+ * interface on the host
+ * \param port The port number on which to receive data; use 0 to
+ * have the system assign an unused port number
+ * \param payload_size UDP payload size by default set to 1472 =
+ * (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param eof Interpret zero-length packet as EOF (default: true)
+ * \param wait Wait for data if not immediately available
+ * (default: true)
*
*/
class gr_udp_source : public gr_sync_block
{
- friend gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
- unsigned short port_src, int payload_size);
+ friend gr_udp_source_sptr gr_make_udp_source(size_t itemsize,
+ const char *host,
+ unsigned short port,
+ int payload_size,
+ bool eof, bool wait);
private:
size_t d_itemsize;
- bool d_updated;
- gruel::mutex d_mutex;
-
- int d_payload_size; // maximum transmission unit (packet length)
- int d_socket; // handle to socket
- int d_socket_rcv; // handle to socket retuned in the accept call
- struct in_addr d_ip_src; // store the source IP address to use
- unsigned short d_port_src; // the port number to open for connections to this service
- struct sockaddr_in d_sockaddr_src; // store the source sockaddr data (formatted IP address and port number)
+ int d_payload_size; // maximum transmission unit (packet length)
+ bool d_eof; // zero-length packet is EOF
+ bool d_wait; // wait if data if not immediately available
+ int d_socket; // handle to socket
char *d_temp_buff; // hold buffer between calls
ssize_t d_residual; // hold information about number of bytes stored in the temp buffer
size_t d_temp_offset; // point to temp buffer location offset
* \brief UDP Source Constructor
*
* \param itemsize The size (in bytes) of the item datatype
- * \param src The source address as either the host name or the 'numbers-and-dots'
- * IP address
- * \param port_src The port number on which the socket listens for data
- * \param payload_size UDP payload size by default set to
- * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param host The name or IP address of the receiving host; can be
+ * NULL, None, or "0.0.0.0" to allow reading from any
+ * interface on the host
+ * \param port The port number on which to receive data; use 0 to
+ * have the system assign an unused port number
+ * \param payload_size UDP payload size by default set to 1472 =
+ * (1500 MTU - (8 byte UDP header) - (20 byte IP header))
+ * \param eof Interpret zero-length packet as EOF (default: true)
+ * \param wait Wait for data if not immediately available
+ * (default: true)
*/
- gr_udp_source(size_t itemsize, const char *src, unsigned short port_src, int payload_size);
+ gr_udp_source(size_t itemsize, const char *host, unsigned short port,
+ int payload_size, bool eof, bool wait);
public:
~gr_udp_source();
- /*!
- * \brief open a socket specified by the port and ip address info
- *
- * Opens a socket, binds to the address, and waits for a connection
- * over UDP. If any of these fail, the fuction retuns the error and exits.
- */
- bool open();
-
- /*!
- * \brief Close current socket.
- *
- * Shuts down read/write on the socket
- */
- void close();
-
/*! \brief return the PAYLOAD_SIZE of the socket */
int payload_size() { return d_payload_size; }
+ /*! \breif return the port number of the socket */
+ int get_port();
+
// should we export anything else?
int work(int noutput_items,
/* -*- c++ -*- */
/*
- * Copyright 2007 Free Software Foundation, Inc.
+ * Copyright 2007,2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
GR_SWIG_BLOCK_MAGIC(gr,udp_source)
gr_udp_source_sptr
- gr_make_udp_source (size_t itemsize, const char *src,
- unsigned short port_src, int payload_size=1472);
+ gr_make_udp_source (size_t itemsize, const char *host,
+ unsigned short port, int payload_size=1472,
+ bool eof=true, bool wait=true) throw (std::runtime_error);
class gr_udp_source : public gr_sync_block
{
protected:
- gr_udp_source (size_t itemsize, const char *src,
- unsigned short port_src, int payload_size);
+ gr_udp_source (size_t itemsize, const char *host,
+ unsigned short port, int payload_size, bool eof, bool wait) throw (std::runtime_error);
public:
~gr_udp_source ();
- bool open();
- void close();
int payload_size() { return d_payload_size; }
-
+ int get_port();
};
projects / debian / gnuradio / commitdiff