354 lines
10 KiB
C++
354 lines
10 KiB
C++
/* -*- c++ -*- */
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/*
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* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
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*
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* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include "tcp_rigctl_msg_source_impl.h"
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#include <satnogs/log.h>
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#include <ifaddrs.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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namespace gr
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{
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namespace satnogs
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{
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tcp_rigctl_msg_source::sptr
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tcp_rigctl_msg_source::make (const std::string& addr, uint16_t port,
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bool server_mode, size_t interval_ms,
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size_t mtu)
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{
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return gnuradio::get_initial_sptr (
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new tcp_rigctl_msg_source_impl (addr, port, server_mode, interval_ms,
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mtu));
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}
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/*
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* The private constructor
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*/
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tcp_rigctl_msg_source_impl::tcp_rigctl_msg_source_impl (
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const std::string& addr, uint16_t port, bool server_mode,
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size_t interval_ms, size_t mtu) :
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gr::block ("tcp_rigctl_msg_source",
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gr::io_signature::make (0, 0, 0),
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gr::io_signature::make (0, 0, 0)),
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d_ip_addr (addr),
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d_port (port),
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d_is_server (server_mode),
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d_interval_ms(interval_ms),
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d_mtu (mtu),
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d_running (true)
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{
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message_port_register_out (pmt::mp ("freq"));
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if(d_is_server) {
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d_thread = boost::shared_ptr<boost::thread> (
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new boost::thread (
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boost::bind (&tcp_rigctl_msg_source_impl::rigctl_server, this)));
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}
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else{
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d_thread = boost::shared_ptr<boost::thread> (
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new boost::thread (
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boost::bind (&tcp_rigctl_msg_source_impl::rigctl_client, this)));
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}
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}
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static inline void
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send_freq (int sock, uint64_t freq)
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{
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static char buf[512];
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snprintf (buf, 512, "%llu\n", freq);
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send (sock, buf, strnlen (buf, 512), 0);
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}
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static inline void
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send_report_code (int sock, int code)
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{
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static char buf[512];
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snprintf (buf, 512, "RPRT %d\n", code);
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send (sock, buf, strnlen (buf, 512), 0);
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}
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static inline void
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request_freq_msg (int sock)
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{
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static const char *cmd = "f\n";
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send (sock, cmd, strnlen(cmd, 2), 0);
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}
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static inline void
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send_quit(int sock)
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{
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static const char *cmd = "q\n";
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send (sock, cmd, strnlen(cmd, 2), 0);
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}
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void
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tcp_rigctl_msg_source_impl::rigctl_client ()
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{
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int sock;
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struct sockaddr_in sin;
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ssize_t ret;
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uint8_t *buf;
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double freq = 0.0;
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int optval = 1;
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struct timeval timeout;
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timeout.tv_sec = 2;
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timeout.tv_usec = 0;
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if ((sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
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perror ("opening UDP socket");
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exit (EXIT_FAILURE);
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}
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memset (&sin, 0, sizeof(struct sockaddr_in));
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sin.sin_family = AF_INET;
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sin.sin_port = htons (d_port);
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sin.sin_addr.s_addr = INADDR_ANY;
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if (inet_aton (d_ip_addr.c_str (), &(sin.sin_addr)) == 0) {
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LOG_ERROR("Wrong IP address");
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close (sock);
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exit (EXIT_FAILURE);
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}
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if (connect(sock, (struct sockaddr *)&sin, sizeof(struct sockaddr_in)) != 0) {
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LOG_ERROR("Could not connect at rigctl server %s", d_ip_addr.c_str());
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close (sock);
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exit (EXIT_FAILURE);
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}
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/*
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* Apply the TCP_NODELAY option at the socket for a packet based
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* behavior.
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*/
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if (setsockopt (sock, IPPROTO_TCP, TCP_NODELAY, &optval, sizeof(int))
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< 0) {
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perror ("TCP setsockopt TCP_NODELAY");
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shutdown(sock, SHUT_RDWR);
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close(sock);
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exit (EXIT_FAILURE);
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}
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/* Set a reasonable timeout at the response from the server */
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if (setsockopt (sock, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout))
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< 0) {
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perror ("TCP setsockopt SO_RCVTIMEO");
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shutdown (sock, SHUT_RDWR);
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close (sock);
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exit (EXIT_FAILURE);
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}
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/* All good until now. Allocate buffer memory and proceed */
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buf = new uint8_t[d_mtu];
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sleep(2);
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while (d_running) {
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/* Request frequency from rigctl */
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request_freq_msg (sock);
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ret = recv (sock, buf, d_mtu, 0);
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if (ret > 0) {
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freq = get_freq_from_buf (buf);
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/*
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* If the frequency is different than 0, then the parsed value
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* is valid and an appropriate message can be generated
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*
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* NOTE: Comparison for equality in floats is a bit tricky.
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* But here the get_freq_from_buf() will assign a 0.0 explicitly
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* if something goes wrong. For this reason it is safe to compare
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* the in-equality against 0.0.
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*/
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if (freq != 0.0 && !std::isnan(freq)) {
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message_port_pub (pmt::mp ("freq"), pmt::from_double (freq));
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}
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}
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boost::this_thread::sleep(boost::posix_time::milliseconds(d_interval_ms));
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}
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send_quit(sock);
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shutdown (sock, SHUT_RDWR);
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close (sock);
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delete[] buf;
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exit (EXIT_SUCCESS);
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}
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void
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tcp_rigctl_msg_source_impl::rigctl_server ()
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{
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int sock;
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int listen_sock;
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struct sockaddr_in sin;
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struct sockaddr client_addr;
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socklen_t client_addr_len;
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ssize_t ret;
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uint8_t *buf;
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double freq = 0.0;
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uint64_t reported_freq = 0;
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int error_code = 0;
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int optval = 1;
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if ((listen_sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
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perror ("opening UDP socket");
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exit (EXIT_FAILURE);
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}
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memset (&client_addr, 0, sizeof(struct sockaddr));
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memset (&sin, 0, sizeof(struct sockaddr_in));
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sin.sin_family = AF_INET;
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sin.sin_port = htons (d_port);
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sin.sin_addr.s_addr = INADDR_ANY;
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if (inet_aton (d_ip_addr.c_str (), &(sin.sin_addr)) == 0) {
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LOG_ERROR("Wrong IP address");
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close (listen_sock);
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exit (EXIT_FAILURE);
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}
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if (bind (listen_sock, (struct sockaddr *) &sin,
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sizeof(struct sockaddr_in)) == -1) {
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perror ("TCP bind");
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close (listen_sock);
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exit (EXIT_FAILURE);
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}
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if (listen (listen_sock, 1000) == -1) {
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perror ("TCP listen");
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close (listen_sock);
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exit (EXIT_FAILURE);
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}
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/* All good until now. Allocate buffer memory and proceed */
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buf = new uint8_t[d_mtu];
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while (d_running) {
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sock = accept (listen_sock, &client_addr, &client_addr_len);
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if (sock <= 0) {
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perror ("TCP accept");
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exit (EXIT_FAILURE);
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}
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/* Apply the TCP_NODELAY option at the accepted socket */
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if (setsockopt (sock, IPPROTO_TCP, TCP_NODELAY, &optval, sizeof(int))
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< 0) {
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perror ("TCP setsockopt");
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shutdown(sock, SHUT_RDWR);
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close(sock);
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exit (EXIT_FAILURE);
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}
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while ((ret = recv (sock, buf, d_mtu, 0)) > 0 && d_running) {
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switch (buf[0])
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{
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case 'F':
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freq = get_freq_from_buf (buf + 2);
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/*
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* If the frequency is different than 0, then the parsed value
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* is valid and an appropriate message can be generated
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*
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* NOTE: Comparison for equality in floats is a bit tricky.
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* But here the get_freq_from_buf() will assign a 0.0 explicitly
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* if something goes wrong. For this reason it is safe to compare
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* the in-equality against 0.0.
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*/
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if (freq != 0.0) {
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reported_freq = freq;
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message_port_pub (pmt::mp ("freq"), pmt::from_double (freq));
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error_code = 0;
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}
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else {
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error_code = -11;
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}
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/* Send the report code */
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send_report_code (sock, error_code);
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break;
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case 'f':
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send_freq (sock, reported_freq);
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break;
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/* Terminate the connection and exit */
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case 'q':
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send_report_code (sock, 0);
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d_running = false;
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break;
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default:
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LOG_WARN("Unsupported rigctl command");
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send_report_code (sock, -11);
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}
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}
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shutdown (sock, SHUT_RDWR);
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close (sock);
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}
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shutdown (listen_sock, SHUT_RDWR);
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close (listen_sock);
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delete[] buf;
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exit (EXIT_SUCCESS);
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}
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/**
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* Parses the string in the \p buf trying to extract a frequency reading
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* until the newline character
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* @param buf the buffer containing a line with the target frequency
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* @return the frequency converted into double
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*/
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double
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tcp_rigctl_msg_source_impl::get_freq_from_buf (const uint8_t* buf)
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{
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long int f;
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char *end;
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f = strtol ((char *) buf, &end, 10);
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/* Check for various possible errors */
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if ((errno == ERANGE && (f == LONG_MAX || f == LONG_MIN))
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|| (errno != 0 && f == 0)) {
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LOG_WARN("Invalid rigctl command");
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f = 0;
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}
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if ((char *) buf == end) {
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LOG_WARN("Invalid rigctl command");
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f = 0;
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}
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return (double) f;
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}
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/*
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* Our virtual destructor.
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*/
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tcp_rigctl_msg_source_impl::~tcp_rigctl_msg_source_impl ()
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{
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d_running = false;
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d_thread->join ();
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}
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} /* namespace satnogs */
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} /* namespace gr */
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