mirror of https://github.com/gnss-sdr/gnss-sdr
113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
/*!
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* \file gr_complex_ip_packet_source.h
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*
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* \brief Receives ip frames containing samples in UDP frame encapsulation
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* using a high performance packet capture library (libpcap)
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* \author Javier Arribas jarribas (at) cttc.es
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR 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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* GNSS-SDR 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 GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GR_COMPLEX_IP_PACKET_SOURCE_H_
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#define GNSS_SDR_GR_COMPLEX_IP_PACKET_SOURCE_H_
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#include <boost/thread.hpp>
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#include <gnuradio/sync_block.h>
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#include <arpa/inet.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <netinet/if_ether.h>
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#include <pcap.h>
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#include <string>
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#include <sys/ioctl.h>
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class Gr_Complex_Ip_Packet_Source : virtual public gr::sync_block
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{
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public:
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typedef boost::shared_ptr<Gr_Complex_Ip_Packet_Source> sptr;
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static sptr make(std::string src_device,
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const std::string &origin_address,
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int udp_port,
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int udp_packet_size,
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int n_baseband_channels,
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const std::string &wire_sample_type,
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size_t item_size,
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bool IQ_swap_);
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Gr_Complex_Ip_Packet_Source(std::string src_device,
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const std::string &origin_address,
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int udp_port,
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int udp_packet_size,
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int n_baseband_channels,
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const std::string &wire_sample_type,
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size_t item_size,
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bool IQ_swap_);
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~Gr_Complex_Ip_Packet_Source();
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// Called by gnuradio to enable drivers, etc for i/o devices.
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bool start();
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// Called by gnuradio to disable drivers, etc for i/o devices.
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bool stop();
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// Where all the action really happens
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int work(int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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private:
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boost::mutex d_mutex;
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pcap_t *descr; // ethernet pcap device descriptor
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char *fifo_buff;
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int fifo_read_ptr;
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int fifo_write_ptr;
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int fifo_items;
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int d_sock_raw;
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int d_udp_port;
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// clang-format off
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struct sockaddr_in si_me{};
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// clang-format on
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std::string d_src_device;
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std::string d_origin_address;
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int d_udp_payload_size;
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bool d_fifo_full;
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int d_n_baseband_channels;
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int d_wire_sample_type;
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int d_bytes_per_sample;
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size_t d_item_size;
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bool d_IQ_swap;
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boost::thread *d_pcap_thread;
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void demux_samples(const gr_vector_void_star &output_items, int num_samples_readed);
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void my_pcap_loop_thread(pcap_t *pcap_handle);
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void pcap_callback(u_char *args, const struct pcap_pkthdr *pkthdr, const u_char *packet);
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static void static_pcap_callback(u_char *args, const struct pcap_pkthdr *pkthdr, const u_char *packet);
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/*
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* Opens the ethernet device using libpcap raw capture mode
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* If any of these fail, the function returns the error and exits.
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*/
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bool open();
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};
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#endif // GNSS_SDR_GR_COMPLEX_IP_PACKET_SOURCE_H_
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