3 * Copyright 2007 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.
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 *src,
35 unsigned short port_src, int payload_size=1472);
38 * \brief Read stream from an UDP socket.
41 * \param itemsize The size (in bytes) of the item datatype
42 * \param src The source address as either the host name or the 'numbers-and-dots'
44 * \param port_src The port number on which the socket listens for data
45 * \param payload_size UDP payload size by default set to
46 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
50 class gr_udp_source : public gr_sync_block
52 friend gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
53 unsigned short port_src, int payload_size);
60 int d_payload_size; // maximum transmission unit (packet length)
61 int d_socket; // handle to socket
62 int d_socket_rcv; // handle to socket retuned in the accept call
63 struct in_addr d_ip_src; // store the source IP address to use
64 unsigned short d_port_src; // the port number to open for connections to this service
65 sockaddr_in d_sockaddr_src; // store the source sockaddr data (formatted IP address and port number)
67 char *d_temp_buff; // hold buffer between calls
68 ssize_t d_residual; // hold information about number of bytes stored in the temp buffer
69 size_t d_temp_offset; // point to temp buffer location offset
73 * \brief UDP Source Constructor
75 * \param itemsize The size (in bytes) of the item datatype
76 * \param src The source address as either the host name or the 'numbers-and-dots'
78 * \param port_src The port number on which the socket listens for data
79 * \param payload_size UDP payload size by default set to
80 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
82 gr_udp_source(size_t itemsize, const char *src, unsigned short port_src, int payload_size);
88 * \brief open a socket specified by the port and ip address info
90 * Opens a socket, binds to the address, and waits for a connection
91 * over UDP. If any of these fail, the fuction retuns the error and exits.
96 * \brief Close current socket.
98 * Shuts down read/write on the socket
102 /*! \brief return the PAYLOAD_SIZE of the socket */
103 int payload_size() { return d_payload_size; }
105 // should we export anything else?
107 int work(int noutput_items,
108 gr_vector_const_void_star &input_items,
109 gr_vector_void_star &output_items);
113 #endif /* INCLUDED_GR_UDP_SOURCE_H */