ipfixprobe_stats.cpp

/**
 * \file ipfixprobe_stats.hpp
 * \brief Exporter live stats reading utility
 * \author Jiri Havranek <havranek@cesnet.cz>
 * \date 2021
 */
/*
 * Copyright (C) 2021 CESNET
 *
 * LICENSE TERMS
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the Company nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 *
 *
 */

#include <config.h>
#include <iomanip>
#include <iostream>
#include <signal.h>
#include <string>
#include <unistd.h>

#include <ipfixprobe/options.hpp>
#include <ipfixprobe/utils.hpp>

#include "stats.hpp"

using namespace ipxp;

volatile sig_atomic_t stop = 0;

void signal_handler(int sig)
{
    stop = 1;
}

class IpfixStatsParser : public OptionsParser {
public:
    pid_t m_pid;
    bool m_one;
    bool m_help;

    IpfixStatsParser()
        : OptionsParser("ipfixprobe_stats", "Read statistics from running ipfixprobe exporter")
        , m_pid(0)
        , m_one(false)
        , m_help(false)
    {
        m_delim = ' ';

        register_option(
            "-p",
            "--pid",
            "NUM",
            "ipfixprobe exporter PID number",
            [this](const char* arg) {
                try {
                    m_pid = str2num<decltype(m_pid)>(arg);
                } catch (std::invalid_argument& e) {
                    return false;
                }
                return true;
            },
            OptionFlags::RequiredArgument);
        register_option(
            "-1",
            "--one",
            "",
            "Print stats and exit",
            [this](const char* arg) {
                m_one = true;
                return true;
            },
            OptionFlags::NoArgument);
        register_option(
            "-h",
            "--help",
            "",
            "Print help",
            [this](const char* arg) {
                m_help = true;
                return true;
            },
            OptionFlags::NoArgument);
    }
};

static void error(const std::string& msg)
{
    std::cerr << "Error: " << msg << std::endl;
}

int main(int argc, char* argv[])
{
    size_t lines_written = 0;
    int fd = -1;
    int status = EXIT_SUCCESS;
    uint8_t buffer[100000];
    msg_header_t* hdr = (msg_header_t*) buffer;
    std::string path;
    IpfixStatsParser parser;

    signal(SIGTERM, signal_handler);
    signal(SIGINT, signal_handler);
    try {
        parser.parse(argc - 1, const_cast<const char**>(argv) + 1);

        if (parser.m_help) {
            parser.usage(std::cout, 0);
            goto EXIT;
        }

        path = DEFAULTSOCKETDIR "/ipfixprobe_" + std::to_string(parser.m_pid) + ".sock";
        fd = connect_to_exporter(path.c_str());
        if (fd == -1) {
            error("connecting to exporter");
            goto EXIT;
        }
    } catch (std::runtime_error& e) {
        error(e.what());
        status = EXIT_FAILURE;
        goto EXIT;
    }

    while (!stop) {
        *(uint32_t*) buffer = MSG_MAGIC;
        // Send stats data request
        if (send_data(fd, sizeof(uint32_t), buffer)) {
            status = EXIT_FAILURE;
            break;
        }

        // Receive message header
        if (recv_data(fd, sizeof(msg_header_t), buffer)) {
            status = EXIT_FAILURE;
            break;
        }

        // Check if message header is correct
        if (hdr->magic != MSG_MAGIC) {
            error("received data are invalid");
            status = EXIT_FAILURE;
            break;
        }

        // Receive array of various stats from exporter
        if (recv_data(fd, hdr->size, (buffer + sizeof(msg_header_t)))) {
            status = EXIT_FAILURE;
            break;
        }

        // Erase previous stats output lines
        for (size_t i = 0; i < lines_written; i++) {
            std::cout << "\033[A\33[2K\r";
        }

        // Process received stats
        std::cout << "Input stats:" << std::endl
                  << std::setw(3) << "#" << std::setw(10) << "packets" << std::setw(10) << "parsed"
                  << std::setw(16) << "bytes" << std::setw(10) << "dropped" << std::setw(10)
                  << "qtime" << std::endl;

        uint8_t* data = buffer + sizeof(msg_header_t);
        size_t idx = 0;
        for (size_t i = 0; i < hdr->inputs; i++) {
            InputStats* stats = (InputStats*) data;
            data += sizeof(InputStats);
            std::cout << std::setw(3) << idx++ << " " << std::setw(9) << stats->packets << " "
                      << std::setw(9) << stats->parsed << " " << std::setw(15) << stats->bytes
                      << " " << std::setw(9) << stats->dropped << " " << std::setw(9)
                      << stats->qtime << " " << std::endl;
        }

        std::cout << "Output stats:" << std::endl
                  << std::setw(3) << "#" << std::setw(10) << "biflows" << std::setw(10) << "packets"
                  << std::setw(16) << "bytes" << std::setw(10) << "dropped" << std::endl;

        idx = 0;
        for (size_t i = 0; i < hdr->outputs; i++) {
            OutputStats* stats = (OutputStats*) data;
            data += sizeof(OutputStats);
            std::cout << std::setw(3) << idx++ << " " << std::setw(9) << stats->biflows << " "
                      << std::setw(9) << stats->packets << " " << std::setw(15) << stats->bytes
                      << " " << std::setw(9) << stats->dropped << " " << std::endl;
        }

        if (parser.m_one) {
            break;
        }

        lines_written = hdr->inputs + hdr->outputs + 4;
        usleep(1000000);
    }
EXIT:
    if (fd != -1) {
        close(fd);
    }
    return status;
}