3 * Copyright 2007,2008,2009 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 #if defined(HAVE_NETDB_H)
29 #include <sys/socket.h> // usually #included by <netdb.h>?
30 #elif defined(HAVE_WINDOWS_H)
35 #include <gruel/thread.h>
38 typedef boost::shared_ptr<gr_udp_source> gr_udp_source_sptr;
40 gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
41 unsigned short port_src, int payload_size=1472);
44 * \brief Read stream from an UDP socket.
47 * \param itemsize The size (in bytes) of the item datatype
48 * \param src The source address as either the host name or the 'numbers-and-dots'
50 * \param port_src The port number on which the socket listens for data
51 * \param payload_size UDP payload size by default set to
52 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
56 class gr_udp_source : public gr_sync_block
58 friend gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
59 unsigned short port_src, int payload_size);
66 int d_payload_size; // maximum transmission unit (packet length)
67 int d_socket; // handle to socket
68 struct addrinfo *d_ip_src; // store the source IP address to use
69 char *d_temp_buff; // hold buffer between calls
70 ssize_t d_residual; // hold information about number of bytes stored in the temp buffer
71 size_t d_temp_offset; // point to temp buffer location offset
75 * \brief UDP Source Constructor
77 * \param itemsize The size (in bytes) of the item datatype
78 * \param src The source address as either the host name or the 'numbers-and-dots'
80 * \param port_src The port number on which the socket listens for data
81 * \param payload_size UDP payload size by default set to
82 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
84 gr_udp_source(size_t itemsize, const char *src, unsigned short port_src, int payload_size);
90 * \brief open a socket specified by the port and ip address info
92 * Opens a socket, binds to the address, and waits for a connection
93 * over UDP. If any of these fail, the fuction retuns the error and exits.
98 * \brief Close current socket.
100 * Shuts down read/write on the socket
104 /*! \brief return the PAYLOAD_SIZE of the socket */
105 int payload_size() { return d_payload_size; }
107 // should we export anything else?
109 int work(int noutput_items,
110 gr_vector_const_void_star &input_items,
111 gr_vector_void_star &output_items);
115 #endif /* INCLUDED_GR_UDP_SOURCE_H */