HelenOS sources

root/uspace/app/ping/ping.c

DEFINITIONS

1. print_syntax
2. ping_signal_received
3. ping_signal_quit
4. ping_ev_recv
5. ping_send
6. transmit_fibril
7. input_fibril
8. main

/*
 * Copyright (c) 2013 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup ping
 * @{
 */
/** @file ICMP echo utility.
 */

#include <async.h>
#include <errno.h>
#include <fibril_synch.h>
#include <inet/addr.h>
#include <inet/host.h>
#include <inet/inetping.h>
#include <io/console.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
#include <str.h>
#include <str_error.h>

#define NAME "ping"

/** Delay between subsequent ping requests in microseconds */
#define PING_DELAY (1000 * 1000)

/** Ping request timeout in microseconds */
#define PING_TIMEOUT (1000 * 1000)

typedef enum {
        RECEIVED_NONE,
        RECEIVED_SUCCESS,
        RECEIVED_INTERRUPT
} received_t;

static received_t received;
static FIBRIL_CONDVAR_INITIALIZE(received_cv);
static FIBRIL_MUTEX_INITIALIZE(received_lock);

static bool quit = false;
static FIBRIL_CONDVAR_INITIALIZE(quit_cv);
static FIBRIL_MUTEX_INITIALIZE(quit_lock);

static errno_t ping_ev_recv(inetping_sdu_t *);

static inetping_ev_ops_t ev_ops = {
        .recv = ping_ev_recv
};

static inet_addr_t src_addr;
static inet_addr_t dest_addr;

static bool repeat_forever = false;
static size_t repeat_count = 1;

static const char *short_options = "46rn:";

static void print_syntax(void)
{
        printf("Syntax: %s [<options>] <host>\n", NAME);
        printf("\t-n <count> Repeat the specified number of times\n");
        printf("\t-r         Repeat forever\n");
        printf("\t-4|-6      Use IPv4 or IPv6 destination host address\n");
}

static void ping_signal_received(received_t value)
{
        fibril_mutex_lock(&received_lock);
        received = value;
        fibril_mutex_unlock(&received_lock);
        fibril_condvar_broadcast(&received_cv);
}

static void ping_signal_quit(void)
{
        fibril_mutex_lock(&quit_lock);
        quit = true;
        fibril_mutex_unlock(&quit_lock);
        fibril_condvar_broadcast(&quit_cv);
}

static errno_t ping_ev_recv(inetping_sdu_t *sdu)
{
        char *asrc;
        errno_t rc = inet_addr_format(&src_addr, &asrc);
        if (rc != EOK)
                return ENOMEM;

        char *adest;
        rc = inet_addr_format(&dest_addr, &adest);
        if (rc != EOK) {
                free(asrc);
                return ENOMEM;
        }

        printf("Received ICMP echo reply: from %s to %s, seq. no %u, "
            "payload size %zu\n", asrc, adest, sdu->seq_no, sdu->size);

        ping_signal_received(RECEIVED_SUCCESS);

        free(asrc);
        free(adest);
        return EOK;
}

static errno_t ping_send(uint16_t seq_no)
{
        inetping_sdu_t sdu;

        sdu.src = src_addr;
        sdu.dest = dest_addr;
        sdu.seq_no = seq_no;
        sdu.data = (void *) "foo";
        sdu.size = 3;

        errno_t rc = inetping_send(&sdu);
        if (rc != EOK)
                printf("Failed sending echo request: %s: %s.\n",
                    str_error_name(rc), str_error(rc));

        return rc;
}

static errno_t transmit_fibril(void *arg)
{
        uint16_t seq_no = 0;

        while ((repeat_count--) || (repeat_forever)) {
                fibril_mutex_lock(&received_lock);
                received = RECEIVED_NONE;
                fibril_mutex_unlock(&received_lock);

                (void) ping_send(++seq_no);

                fibril_mutex_lock(&received_lock);
                errno_t rc = fibril_condvar_wait_timeout(&received_cv, &received_lock,
                    PING_TIMEOUT);
                received_t recv = received;
                fibril_mutex_unlock(&received_lock);

                if ((rc == ETIMEOUT) || (recv == RECEIVED_NONE))
                        printf("Echo request timed out (seq. no %u)\n", seq_no);

                if (recv == RECEIVED_INTERRUPT)
                        break;

                if ((repeat_count > 0) || (repeat_forever)) {
                        fibril_mutex_lock(&received_lock);
                        rc = fibril_condvar_wait_timeout(&received_cv, &received_lock,
                            PING_DELAY);
                        recv = received;
                        fibril_mutex_unlock(&received_lock);

                        if (recv == RECEIVED_INTERRUPT)
                                break;
                }
        }

        ping_signal_quit();
        return 0;
}

static errno_t input_fibril(void *arg)
{
        console_ctrl_t *con = console_init(stdin, stdout);

        while (true) {
                cons_event_t ev;
                errno_t rc;
                rc = console_get_event(con, &ev);
                if (rc != EOK) {
                        ping_signal_received(RECEIVED_INTERRUPT);
                        break;
                }

                if ((ev.type == CEV_KEY) && (ev.ev.key.type == KEY_PRESS) &&
                    ((ev.ev.key.mods & (KM_ALT | KM_SHIFT)) == 0) &&
                    ((ev.ev.key.mods & KM_CTRL) != 0)) {
                        /* Ctrl+key */
                        if (ev.ev.key.key == KC_Q) {
                                ping_signal_received(RECEIVED_INTERRUPT);
                                break;
                        }
                }
        }

        return 0;
}

int main(int argc, char *argv[])
{
        char *asrc = NULL;
        char *adest = NULL;
        char *sdest = NULL;
        char *host;
        const char *errmsg;
        ip_ver_t ip_ver = ip_any;

        errno_t rc = inetping_init(&ev_ops);
        if (rc != EOK) {
                printf("Failed connecting to internet ping service: "
                    "%s: %s.\n", str_error_name(rc), str_error(rc));
                goto error;
        }

        int c;
        while ((c = getopt(argc, argv, short_options)) != -1) {
                switch (c) {
                case 'r':
                        repeat_forever = true;
                        break;
                case 'n':
                        rc = str_size_t(optarg, NULL, 10, true, &repeat_count);
                        if (rc != EOK) {
                                printf("Invalid repeat count.\n");
                                print_syntax();
                                goto error;
                        }
                        break;
                case '4':
                        ip_ver = ip_v4;
                        break;
                case '6':
                        ip_ver = ip_v6;
                        break;
                default:
                        printf("Unknown option passed.\n");
                        print_syntax();
                        goto error;
                }
        }

        if (optind >= argc) {
                printf("IP address or host name not supplied.\n");
                print_syntax();
                goto error;
        }

        host = argv[optind];

        /* Look up host */
        rc = inet_host_plookup_one(host, ip_ver, &dest_addr, NULL, &errmsg);
        if (rc != EOK) {
                printf("Error resolving host '%s' (%s).\n", host, errmsg);
                goto error;
        }

        /* Determine source address */
        rc = inetping_get_srcaddr(&dest_addr, &src_addr);
        if (rc != EOK) {
                printf("Failed determining source address.\n");
                goto error;
        }

        rc = inet_addr_format(&src_addr, &asrc);
        if (rc != EOK) {
                printf("Out of memory.\n");
                goto error;
        }

        rc = inet_addr_format(&dest_addr, &adest);
        if (rc != EOK) {
                printf("Out of memory.\n");
                goto error;
        }

        if (asprintf(&sdest, "%s (%s)", host, adest) < 0) {
                printf("Out of memory.\n");
                goto error;
        }

        printf("Sending ICMP echo request from %s to %s (Ctrl+Q to quit)\n",
            asrc, sdest);

        fid_t fid = fibril_create(transmit_fibril, NULL);
        if (fid == 0) {
                printf("Failed creating transmit fibril.\n");
                goto error;
        }

        fibril_add_ready(fid);

        fid = fibril_create(input_fibril, NULL);
        if (fid == 0) {
                printf("Failed creating input fibril.\n");
                goto error;
        }

        fibril_add_ready(fid);

        fibril_mutex_lock(&quit_lock);
        while (!quit)
                fibril_condvar_wait(&quit_cv, &quit_lock);
        fibril_mutex_unlock(&quit_lock);

        free(asrc);
        free(adest);
        free(sdest);
        return 0;

error:
        free(asrc);
        free(adest);
        free(sdest);
        return 1;
}

/** @}
 */