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/*
Copyright (C) 2001-2025 Free Software Foundation, Inc.
This file is part of GNU Inetutils.
GNU Inetutils 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 3 of the License, or (at
your option) any later version.
GNU Inetutils 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, see `http://www.gnu.org/licenses/'. */
/* NOTE: most of existing routers simply discard ICMP_ADDRESS requests. */
#include <config.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
/*#include <netinet/ip_icmp.h> -- deliberately not including this */
#ifdef HAVE_NETINET_IP_VAR_H
# include <netinet/ip_var.h>
#endif
#include <netdb.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <attribute.h>
#include <ping.h>
#include <ping_impl.h>
static int recv_address (int code, void *closure,
struct sockaddr_in *dest, struct sockaddr_in *from,
struct ip *ip, icmphdr_t * icmp, int datalen);
static void print_address (int dupflag, void *closure,
struct sockaddr_in *dest, struct sockaddr_in *from,
struct ip *ip, icmphdr_t * icmp, int datalen);
static int address_finish (void);
int
ping_address (char *hostname)
{
ping_set_type (ping, ICMP_ADDRESS);
ping_set_event_handler (ping, recv_address, NULL);
ping_set_packetsize (ping, ICMP_MASKLEN);
ping_set_count (ping, 1);
if (ping_set_dest (ping, hostname))
error (EXIT_FAILURE, 0, "unknown host");
printf ("PING %s (%s): sending address mask request\n",
ping->ping_hostname,
inet_ntoa (ping->ping_dest.ping_sockaddr.sin_addr));
return ping_run (ping, address_finish);
}
int
recv_address (int code, void *closure,
struct sockaddr_in *dest, struct sockaddr_in *from,
struct ip *ip, icmphdr_t *icmp, int datalen)
{
switch (code)
{
case PEV_RESPONSE:
case PEV_DUPLICATE:
print_address (code == PEV_DUPLICATE,
closure, dest, from, ip, icmp, datalen);
break;
case PEV_NOECHO:;
print_icmp_header (from, ip, icmp, datalen);
}
return 0;
}
void
print_address (int dupflag, void *closure MAYBE_UNUSED,
struct sockaddr_in *dest MAYBE_UNUSED,
struct sockaddr_in *from,
struct ip *ip MAYBE_UNUSED, icmphdr_t *icmp, int datalen)
{
struct in_addr addr;
printf ("%d bytes from %s: icmp_seq=%u", datalen,
inet_ntoa (*(struct in_addr *) &from->sin_addr.s_addr),
ntohs (icmp->icmp_seq));
if (dupflag)
printf (" (DUP!)");
printf ("\n");
addr.s_addr = icmp->icmp_mask;
printf ("icmp_mask = %s", inet_ntoa (addr));
printf ("\n");
return;
}
int
address_finish (void)
{
return 0;
}
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