3 * Copyright 2004 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 2, 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.
23 #ifndef INCLUDED_GR_UDP_SOURCE_H
24 #define INCLUDED_GR_UDP_SOURCE_H
26 #include <gr_sync_block.h>
27 #include <omnithread.h>
28 #include <sys/socket.h>
29 #include <arpa/inet.h>
32 typedef boost::shared_ptr<gr_udp_source> gr_udp_source_sptr;
34 gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *ipaddr,
35 unsigned short port, unsigned int mtu=540);
37 class gr_udp_source : public gr_sync_block
39 friend gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *ipaddr,
40 unsigned short port, unsigned int mtu);
47 unsigned int d_mtu; // maximum transmission unit (packet length)
48 int d_socket; // handle to socket
49 int d_socket_rcv; // handle to socket retuned in the accept call
50 struct in_addr d_ipaddr_local; // store the local IP address to use
51 struct in_addr d_ipaddr_remote; // store the remote IP address that connected to us
52 unsigned short d_port_local; // the port number to open for connections to this service
53 unsigned short d_port_remote; // port number of the remove system
54 sockaddr_in d_sockaddr_local; // store the local sockaddr data (formatted IP address and port number)
55 sockaddr_in d_sockaddr_remote; // store the remote sockaddr data (formatted IP address and port number)
58 gr_udp_source(size_t itemsize, const char *ipaddr, unsigned short port, unsigned int mtu);
64 * \brief open a socket specified by the port and ip address info
66 * Opens a socket, binds to the address, and waits for a connection
67 * over UDP. If any of these fail, the fuction retuns the error and exits.
72 * \brief Close current socket.
74 * Shuts down read/write on the socket
78 /*! \brief set the MTU of the socket */
79 void set_mtu(unsigned int mtu) { d_mtu = mtu; }
81 /*! \brief return the MTU of the socket */
82 unsigned int mtu() { return d_mtu; }
84 // should we export anything else?
86 int work(int noutput_items,
87 gr_vector_const_void_star &input_items,
88 gr_vector_void_star &output_items);
92 #endif /* INCLUDED_GR_UDP_SOURCE_H */