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/*
mtr -- a network diagnostic tool
Copyright (C) 1997,1998 Matt Kimball
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mtr-curses.h"
#include "getopt.h"
#include "display.h"
#include "dns.h"
#include "report.h"
#include "net.h"
int DisplayMode;
int Interactive = 1;
int PrintVersion = 0;
int PrintHelp = 0;
int MaxPing = 16;
float WaitTime = 1.0;
char *Hostname = NULL;
void parse_arg(int argc, char **argv) {
int opt;
static struct option long_options[] = {
{ "version", 0, 0, 'v' },
{ "help", 0, 0, 'h' },
{ "report", 0, 0, 'r' },
{ "report-cycles", 1, 0, 'c' },
{ "curses", 0, 0, 't' },
{ "gtk", 0, 0, 'g' },
{ "interval", 1, 0, 'i' },
{ 0, 0, 0, 0 }
};
opt = 0;
while(1) {
opt = getopt_long(argc, argv, "hvrc:tli:", long_options, NULL);
if(opt == -1)
break;
switch(opt) {
case 'v':
PrintVersion = 1;
break;
case 'h':
PrintHelp = 1;
break;
case 'r':
DisplayMode = DisplayReport;
break;
case 'c':
MaxPing = atoi(optarg);
break;
case 't':
DisplayMode = DisplayCurses;
break;
case 'g':
DisplayMode = DisplayGTK;
break;
case 'i':
WaitTime = atof(optarg);
if (WaitTime <= 0.0) {
fprintf (stderr, "mtr: wait time must be positive\n");
exit (-1);
}
break;
}
}
if(DisplayMode == DisplayReport)
Interactive = 0;
if(optind != argc - 1)
return;
Hostname = argv[optind];
}
int main(int argc, char **argv) {
int traddr;
struct hostent *host;
/* Get the raw sockets first thing, so we can drop to user euid immediately */
if(net_preopen() != 0) {
printf("mtr: Unable to get raw socket. (Executable not suid?)\n");
exit(0);
}
/* Now drop to user permissions */
if(seteuid(getuid())) {
printf("mtr: Unable to drop permissions.\n");
exit(0);
}
/* Double check, just in case */
if(geteuid() != getuid()) {
printf("mtr: Unable to drop permissions.\n");
exit(0);
}
display_detect(&argc, &argv);
parse_arg(argc, argv);
if(PrintVersion) {
printf("mtr " VERSION "\n");
exit(0);
}
if(Hostname == NULL || PrintHelp) {
printf("usage: %s [-hvrctli] [--help] [--version] [--report]\n"
"\t\t[--report-cycles=COUNT] [--curses] [--gtk]\n"
"\t\t[--interval=SECONDS] HOSTNAME\n", argv[0]);
exit(0);
}
host = gethostbyname(Hostname);
if(host == NULL) {
#ifndef NO_HERROR
herror("mtr");
#else
printf("mtr: error looking up \"%s\"\n", Hostname);
#endif
exit(0);
}
traddr = *(int *)host->h_addr;
if(net_open(traddr) != 0) {
printf("mtr: Unable to get raw socket. (Executable not suid?)\n");
exit(0);
}
display_open();
dns_open();
display_loop();
net_end_transit();
display_close();
net_close();
return 0;
}
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