/* -*- c++ -*- */
/*
- * Copyright 2004 Free Software Foundation, Inc.
+ * Copyright 2007,2008,2009,2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
+ * the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
#define INCLUDED_GR_UDP_SOURCE_H
#include <gr_sync_block.h>
-#include <omnithread.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
+#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 *ipaddr,
- unsigned short port, unsigned int mtu=540);
+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 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 *ipaddr,
- unsigned short port, unsigned int mtu);
+ 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;
- omni_mutex d_mutex;
+ 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
- unsigned int d_mtu; // 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_ipaddr_local; // store the local IP address to use
- struct in_addr d_ipaddr_remote; // store the remote IP address that connected to us
- unsigned short d_port_local; // the port number to open for connections to this service
- unsigned short d_port_remote; // port number of the remove system
- sockaddr_in d_sockaddr_local; // store the local sockaddr data (formatted IP address and port number)
- sockaddr_in d_sockaddr_remote; // store the remote sockaddr data (formatted IP address and port number)
-
protected:
- gr_udp_source(size_t itemsize, const char *ipaddr, unsigned short port, unsigned int mtu);
-
- 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.
+ * \brief UDP Source Constructor
+ *
+ * \param itemsize The size (in bytes) of the item datatype
+ * \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)
*/
- bool open();
+ gr_udp_source(size_t itemsize, const char *host, unsigned short port,
+ int payload_size, bool eof, bool wait);
- /*!
- * \brief Close current socket.
- *
- * Shuts down read/write on the socket
- */
- void close();
+ public:
+ ~gr_udp_source();
- /*! \brief set the MTU of the socket */
- void set_mtu(unsigned int mtu) { d_mtu = mtu; }
+ /*! \brief return the PAYLOAD_SIZE of the socket */
+ int payload_size() { return d_payload_size; }
- /*! \brief return the MTU of the socket */
- unsigned int mtu() { return d_mtu; }
+ /*! \breif return the port number of the socket */
+ int get_port();
// should we export anything else?
projects / debian / gnuradio / blobdiff