wifidog-1.1.1/src/wdctl.c

/********************************************************************\
 * This program is free software; you can redistribute it and/or    *
 * modify it under the terms of the GNU General Public License as   *
 * published by the Free Software Foundation; either version 2 of   *
 * the License, or (at your option) any later version.              *
 *                                                                  *
 * This program is distributed in the hope that it will be useful,  *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of   *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    *
 * GNU General Public License for more details.                     *
 *                                                                  *
 * You should have received a copy of the GNU General Public License*
 * along with this program; if not, contact:                        *
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/* $Header: /cvsroot/wifidog/wifidog/src/wdctl.c,v 1.7 2004/08/30 21:46:58 alexcv Exp $ */
#define _GNU_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <syslog.h>
#include <errno.h>

#include "wdctl.h"

s_config config;

static void usage(void);
static void init_config(void);
static void parse_commandline(int, char **);
static int connect_to_server(char *);
static int send_request(int, char *);
static void wdctl_status(void);
static void wdctl_stop(void);
static void wdctl_reset(void);

static void
usage(void)
{
    printf("Usage: wdctl [options] command [arguments]\n");
    printf("\n");
    printf("options:\n");
    printf("  -s <path>         Path to the socket\n");
    printf("  -h                Print usage\n");
    printf("\n");
    printf("commands:\n");
    printf("  reset [mac|ip]    Reset the specified mac or ip connection\n");
    printf("  status            Obtain the status of wifidog\n");
    printf("  stop              Stop the running wifidog\n");
    printf("\n");
}

static void
init_config(void)
{

        config.socket = strdup(DEFAULT_SOCK);
        config.command = WDCTL_UNDEF;
}

void
parse_commandline(int argc, char **argv)
{
    extern int optind;
    int c;

    while (-1 != (c = getopt(argc, argv, "s:h"))) {
        switch(c) {
            case 'h':
                usage();
                exit(1);
                break;

            case 's':
                if (optarg) {
                    free(config.socket);
                    config.socket = strdup(optarg);
                }
                break;

            default:
                usage();
                exit(1);
                break;
        }
    }

    if ((argc - optind) <= 0) {
            usage();
            exit(1);
    }

    if (strcmp(*(argv + optind), "status") == 0) {
            config.command = WDCTL_STATUS;
    } else if (strcmp(*(argv + optind), "stop") == 0) {
            config.command = WDCTL_STOP;
    } else if (strcmp(*(argv + optind), "reset") == 0) {
            config.command = WDCTL_KILL;
            if ((argc - (optind + 1)) <= 0) {
                    fprintf(stderr, "wdctl: Error: You must specify an IP "
                                    "or a Mac address to reset\n");
                    usage();
                    exit(1);
            }
            config.param = strdup(*(argv + optind + 1));
    }

    if (config.command == WDCTL_UNDEF) {
            fprintf(stderr, "wdctl: Error: Invalid command \"%s\"\n", *argv);
            usage();
            exit(1);
    }
}

static int
connect_to_server(char *sock_name)
{
        int sock;
        struct sockaddr_un      sa_un;
        
        /* Connect to socket */
        sock = socket(AF_UNIX, SOCK_STREAM, 0);
        memset(&sa_un, 0, sizeof(sa_un));
        sa_un.sun_family = AF_UNIX;
        strncpy(sa_un.sun_path, sock_name, (sizeof(sa_un.sun_path) - 1));

        if (connect(sock, (struct sockaddr *)&sa_un, 
                        strlen(sa_un.sun_path) + sizeof(sa_un.sun_family))) {
                fprintf(stderr, "wdctl: wifidog probably not started (Error: %s)\n", strerror(errno));
                exit(1);
        }

        return sock;
}

static int
send_request(int sock, char *request)
{
        ssize_t len,
                written;
                
        len = 0;
        while (len != strlen(request)) {
                written = write(sock, (request + len), strlen(request) - len);
                if (written == -1) {
                        fprintf(stderr, "Write to wifidog failed: %s\n",
                                        strerror(errno));
                        exit(1);
                }
                len += written;
        }

        return((int)len);
}

static void
wdctl_status(void)
{
        int     sock;
        char    buffer[4096];
        char    request[16];
        int     len;

        sock = connect_to_server(config.socket);
                
        strncpy(request, "status\r\n\r\n", 15);

        len = send_request(sock, request);
        
        while ((len = read(sock, buffer, sizeof(buffer))) > 0) {
                buffer[len] = '\0';
                printf("%s", buffer);
        }

        shutdown(sock, 2);
        close(sock);
}

static void
wdctl_stop(void)
{
        int     sock;
        char    buffer[4096];
        char    request[16];
        int     len;

        sock = connect_to_server(config.socket);
                
        strncpy(request, "stop\r\n\r\n", 15);

        len = send_request(sock, request);
        
        while ((len = read(sock, buffer, sizeof(buffer))) > 0) {
                buffer[len] = '\0';
                printf("%s", buffer);
        }

        shutdown(sock, 2);
        close(sock);
}

void
wdctl_reset(void)
{
        int     sock;
        char    buffer[4096];
        char    request[64];
        int     len,
                rlen;

        sock = connect_to_server(config.socket);
                
        strncpy(request, "reset ", 64);
        strncat(request, config.param, (64 - strlen(request)));
        strncat(request, "\r\n\r\n", (64 - strlen(request)));

        len = send_request(sock, request);
        
        len = 0;
        memset(buffer, 0, sizeof(buffer));
        while ((len < sizeof(buffer)) && ((rlen = read(sock, (buffer + len),
                                (sizeof(buffer) - len))) > 0)){
                len += rlen;
        }

        if (strcmp(buffer, "Yes") == 0) {
                printf("Connection %s successfully reset.\n", config.param);
        } else if (strcmp(buffer, "No") == 0) {
                printf("Connection %s was not active.\n", config.param);
        } else {
                fprintf(stderr, "wdctl: Error: WiFiDog sent an abnormal "
                                "reply.\n");
        }

        shutdown(sock, 2);
        close(sock);
}

int
main(int argc, char **argv)
{

        /* Init configuration */
        init_config();
        parse_commandline(argc, argv);

        switch(config.command) {
        case WDCTL_STATUS:
                wdctl_status();
                break;
        
        case WDCTL_STOP:
                wdctl_stop();
                break;

        case WDCTL_KILL:
                wdctl_reset();
                break;
                
        default:
                /* XXX NEVER REACHED */
                fprintf(stderr, "Oops\n");
                exit(1);
                break;
        }
        exit(0);
}

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