3 * Copyright 2007,2008 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 <gnuradio/omnithread.h>
28 #if defined(HAVE_SOCKET)
29 #include <sys/socket.h>
30 #include <arpa/inet.h>
31 #elif defined(HAVE_WINDOWS_H)
35 #if defined(HAVE_NETINET_IN_H)
36 #include <netinet/in.h>
40 typedef boost::shared_ptr<gr_udp_source> gr_udp_source_sptr;
42 gr_udp_source_sptr gr_make_udp_source(size_t itemsize, const char *src,
43 unsigned short port_src, int payload_size=1472);
46 * \brief Read stream from an UDP socket.
49 * \param itemsize The size (in bytes) of the item datatype
50 * \param src The source address as either the host name or the 'numbers-and-dots'
52 * \param port_src The port number on which the socket listens for data
53 * \param payload_size UDP payload size by default set to
54 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
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, int payload_size);
68 int d_payload_size; // maximum transmission unit (packet length)
69 int d_socket; // handle to socket
70 int d_socket_rcv; // handle to socket retuned in the accept call
71 struct in_addr d_ip_src; // store the source IP address to use
72 unsigned short d_port_src; // the port number to open for connections to this service
73 struct sockaddr_in d_sockaddr_src; // store the source sockaddr data (formatted IP address and port number)
74 char *d_temp_buff; // hold buffer between calls
75 ssize_t d_residual; // hold information about number of bytes stored in the temp buffer
76 size_t d_temp_offset; // point to temp buffer location offset
80 * \brief UDP Source Constructor
82 * \param itemsize The size (in bytes) of the item datatype
83 * \param src The source address as either the host name or the 'numbers-and-dots'
85 * \param port_src The port number on which the socket listens for data
86 * \param payload_size UDP payload size by default set to
87 * 1472 = (1500 MTU - (8 byte UDP header) - (20 byte IP header))
89 gr_udp_source(size_t itemsize, const char *src, unsigned short port_src, int payload_size);
95 * \brief open a socket specified by the port and ip address info
97 * Opens a socket, binds to the address, and waits for a connection
98 * over UDP. If any of these fail, the fuction retuns the error and exits.
103 * \brief Close current socket.
105 * Shuts down read/write on the socket
109 /*! \brief return the PAYLOAD_SIZE of the socket */
110 int payload_size() { return d_payload_size; }
112 // should we export anything else?
114 int work(int noutput_items,
115 gr_vector_const_void_star &input_items,
116 gr_vector_void_star &output_items);
120 #endif /* INCLUDED_GR_UDP_SOURCE_H */