3 * Copyright 2007,2008,2009,2010 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,
42 int payload_size=1472, bool wait=true);
45 * \brief Read stream from an UDP socket.
48 * \param itemsize The size (in bytes) of the item datatype
49 * \param src The source address as either the host name or the 'numbers-and-dots'
51 * \param port_src The port number on which the socket listens for data
52 * \param payload_size UDP payload size by default set to
53 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
54 * \param wait Wait for data if not immediately available (default: true)
58 class gr_udp_source : public gr_sync_block
60 friend gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
61 unsigned short port_src,
62 int payload_size, bool wait);
67 int d_payload_size; // maximum transmission unit (packet length)
68 bool d_wait; // wait if data if not immediately available
69 int d_socket; // handle to socket
70 char *d_temp_buff; // hold buffer between calls
71 ssize_t d_residual; // hold information about number of bytes stored in the temp buffer
72 size_t d_temp_offset; // point to temp buffer location offset
76 * \brief UDP Source Constructor
78 * \param itemsize The size (in bytes) of the item datatype
79 * \param src The source address as either the host name or the 'numbers-and-dots'
81 * \param port_src The port number on which the socket listens for data
82 * \param payload_size UDP payload size by default set to
83 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
84 * \param wait Wait for data if not immediately available (default: true)
86 gr_udp_source(size_t itemsize, const char *src, unsigned short port_src,
87 int payload_size, bool wait);
92 /*! \brief return the PAYLOAD_SIZE of the socket */
93 int payload_size() { return d_payload_size; }
95 // should we export anything else?
97 int work(int noutput_items,
98 gr_vector_const_void_star &input_items,
99 gr_vector_void_star &output_items);
103 #endif /* INCLUDED_GR_UDP_SOURCE_H */