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header file usage before the 0.49 release. To fix it, I had to move the '#include "busybox.h"' to the end of the list of #include files. -Erik
585 lines
15 KiB
C
585 lines
15 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* $Id: ping.c,v 1.38 2001/02/20 06:14:08 andersen Exp $
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* Mini ping implementation for busybox
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*
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* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This version of ping is adapted from the ping in netkit-base 0.10,
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* which is:
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*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Mike Muuss.
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*
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* Original copyright notice is retained at the end of this file.
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/times.h>
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#include <sys/signal.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include "busybox.h"
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/* It turns out that libc5 doesn't have proper icmp support
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* built into it header files, so we have to supplement it */
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#if ! defined __GLIBC__ && ! defined __UCLIBC__
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typedef unsigned int socklen_t;
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static const int ICMP_MINLEN = 8; /* abs minimum */
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struct icmp_ra_addr
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{
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u_int32_t ira_addr;
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u_int32_t ira_preference;
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};
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struct icmp
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{
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u_int8_t icmp_type; /* type of message, see below */
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u_int8_t icmp_code; /* type sub code */
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u_int16_t icmp_cksum; /* ones complement checksum of struct */
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union
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{
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u_char ih_pptr; /* ICMP_PARAMPROB */
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struct in_addr ih_gwaddr; /* gateway address */
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struct ih_idseq /* echo datagram */
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{
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u_int16_t icd_id;
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u_int16_t icd_seq;
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} ih_idseq;
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u_int32_t ih_void;
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/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
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struct ih_pmtu
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{
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u_int16_t ipm_void;
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u_int16_t ipm_nextmtu;
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} ih_pmtu;
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struct ih_rtradv
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{
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u_int8_t irt_num_addrs;
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u_int8_t irt_wpa;
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u_int16_t irt_lifetime;
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} ih_rtradv;
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} icmp_hun;
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#define icmp_pptr icmp_hun.ih_pptr
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#define icmp_gwaddr icmp_hun.ih_gwaddr
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#define icmp_id icmp_hun.ih_idseq.icd_id
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#define icmp_seq icmp_hun.ih_idseq.icd_seq
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#define icmp_void icmp_hun.ih_void
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#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
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#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
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#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
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#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
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#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
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union
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{
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struct
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{
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u_int32_t its_otime;
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u_int32_t its_rtime;
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u_int32_t its_ttime;
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} id_ts;
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struct
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{
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struct ip idi_ip;
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/* options and then 64 bits of data */
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} id_ip;
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struct icmp_ra_addr id_radv;
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u_int32_t id_mask;
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u_int8_t id_data[1];
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} icmp_dun;
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#define icmp_otime icmp_dun.id_ts.its_otime
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#define icmp_rtime icmp_dun.id_ts.its_rtime
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#define icmp_ttime icmp_dun.id_ts.its_ttime
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#define icmp_ip icmp_dun.id_ip.idi_ip
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#define icmp_radv icmp_dun.id_radv
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#define icmp_mask icmp_dun.id_mask
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#define icmp_data icmp_dun.id_data
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};
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#endif
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static const int DEFDATALEN = 56;
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static const int MAXIPLEN = 60;
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static const int MAXICMPLEN = 76;
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static const int MAXPACKET = 65468;
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#define MAX_DUP_CHK (8 * 128)
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static const int MAXWAIT = 10;
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static const int PINGINTERVAL = 1; /* second */
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#define O_QUIET (1 << 0)
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#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
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#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
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#define SET(bit) (A(bit) |= B(bit))
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#define CLR(bit) (A(bit) &= (~B(bit)))
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#define TST(bit) (A(bit) & B(bit))
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static void ping(const char *host);
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/* common routines */
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static int in_cksum(unsigned short *buf, int sz)
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{
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int nleft = sz;
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int sum = 0;
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unsigned short *w = buf;
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unsigned short ans = 0;
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while (nleft > 1) {
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sum += *w++;
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nleft -= 2;
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}
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if (nleft == 1) {
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*(unsigned char *) (&ans) = *(unsigned char *) w;
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sum += ans;
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}
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sum = (sum >> 16) + (sum & 0xFFFF);
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sum += (sum >> 16);
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ans = ~sum;
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return (ans);
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}
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/* simple version */
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#ifdef BB_FEATURE_SIMPLE_PING
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static char *hostname = NULL;
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static void noresp(int ign)
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{
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printf("No response from %s\n", hostname);
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exit(0);
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}
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static void ping(const char *host)
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{
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struct hostent *h;
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struct sockaddr_in pingaddr;
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struct icmp *pkt;
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int pingsock, c;
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char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
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if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) /* 1 == ICMP */
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perror_msg_and_die("creating a raw socket");
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/* drop root privs if running setuid */
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setuid(getuid());
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memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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pingaddr.sin_family = AF_INET;
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if (!(h = gethostbyname(host))) {
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error_msg("unknown host %s", host);
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exit(1);
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}
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memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
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hostname = h->h_name;
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pkt = (struct icmp *) packet;
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memset(pkt, 0, sizeof(packet));
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pkt->icmp_type = ICMP_ECHO;
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pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
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c = sendto(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
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if (c < 0 || c != sizeof(packet))
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perror_msg_and_die("sendto");
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signal(SIGALRM, noresp);
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alarm(5); /* give the host 5000ms to respond */
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/* listen for replies */
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while (1) {
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struct sockaddr_in from;
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size_t fromlen = sizeof(from);
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if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &from, &fromlen)) < 0) {
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if (errno == EINTR)
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continue;
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perror_msg("recvfrom");
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continue;
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}
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if (c >= 76) { /* ip + icmp */
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struct iphdr *iphdr = (struct iphdr *) packet;
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pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */
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if (pkt->icmp_type == ICMP_ECHOREPLY)
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break;
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}
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}
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printf("%s is alive!\n", hostname);
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return;
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}
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extern int ping_main(int argc, char **argv)
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{
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argc--;
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argv++;
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if (argc < 1)
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show_usage();
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ping(*argv);
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return EXIT_SUCCESS;
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}
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#else /* ! BB_FEATURE_SIMPLE_PING */
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/* full(er) version */
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static char *hostname = NULL;
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static struct sockaddr_in pingaddr;
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static int pingsock = -1;
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static int datalen; /* intentionally uninitialized to work around gcc bug */
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static long ntransmitted = 0, nreceived = 0, nrepeats = 0, pingcount = 0;
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static int myid = 0, options = 0;
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static unsigned long tmin = ULONG_MAX, tmax = 0, tsum = 0;
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static char rcvd_tbl[MAX_DUP_CHK / 8];
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static void sendping(int);
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static void pingstats(int);
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static void unpack(char *, int, struct sockaddr_in *);
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/**************************************************************************/
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static void pingstats(int junk)
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{
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int status;
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signal(SIGINT, SIG_IGN);
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printf("\n--- %s ping statistics ---\n", hostname);
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printf("%ld packets transmitted, ", ntransmitted);
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printf("%ld packets received, ", nreceived);
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if (nrepeats)
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printf("%ld duplicates, ", nrepeats);
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if (ntransmitted)
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printf("%ld%% packet loss\n",
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(ntransmitted - nreceived) * 100 / ntransmitted);
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if (nreceived)
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printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
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tmin / 10, tmin % 10,
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(tsum / (nreceived + nrepeats)) / 10,
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(tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
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if (nreceived != 0)
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status = EXIT_SUCCESS;
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else
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status = EXIT_FAILURE;
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exit(status);
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}
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static void sendping(int junk)
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{
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struct icmp *pkt;
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int i;
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char packet[datalen + 8];
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pkt = (struct icmp *) packet;
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pkt->icmp_type = ICMP_ECHO;
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pkt->icmp_code = 0;
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pkt->icmp_cksum = 0;
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pkt->icmp_seq = ntransmitted++;
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pkt->icmp_id = myid;
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CLR(pkt->icmp_seq % MAX_DUP_CHK);
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gettimeofday((struct timeval *) &packet[8], NULL);
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pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
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i = sendto(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
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if (i < 0)
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perror_msg_and_die("sendto");
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else if ((size_t)i != sizeof(packet))
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error_msg_and_die("ping wrote %d chars; %d expected", i,
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(int)sizeof(packet));
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signal(SIGALRM, sendping);
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if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
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alarm(PINGINTERVAL);
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} else { /* done, wait for the last ping to come back */
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/* todo, don't necessarily need to wait so long... */
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signal(SIGALRM, pingstats);
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alarm(MAXWAIT);
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}
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}
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static char *icmp_type_name (int id)
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{
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switch (id) {
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case ICMP_ECHOREPLY: return "Echo Reply";
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case ICMP_DEST_UNREACH: return "Destination Unreachable";
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case ICMP_SOURCE_QUENCH: return "Source Quench";
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case ICMP_REDIRECT: return "Redirect (change route)";
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case ICMP_ECHO: return "Echo Request";
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case ICMP_TIME_EXCEEDED: return "Time Exceeded";
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case ICMP_PARAMETERPROB: return "Parameter Problem";
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case ICMP_TIMESTAMP: return "Timestamp Request";
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case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
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case ICMP_INFO_REQUEST: return "Information Request";
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case ICMP_INFO_REPLY: return "Information Reply";
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case ICMP_ADDRESS: return "Address Mask Request";
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case ICMP_ADDRESSREPLY: return "Address Mask Reply";
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default: return "unknown ICMP type";
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}
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}
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static void unpack(char *buf, int sz, struct sockaddr_in *from)
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{
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struct icmp *icmppkt;
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struct iphdr *iphdr;
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struct timeval tv, *tp;
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int hlen, dupflag;
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unsigned long triptime;
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gettimeofday(&tv, NULL);
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/* check IP header */
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iphdr = (struct iphdr *) buf;
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hlen = iphdr->ihl << 2;
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/* discard if too short */
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if (sz < (datalen + ICMP_MINLEN))
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return;
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sz -= hlen;
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icmppkt = (struct icmp *) (buf + hlen);
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if (icmppkt->icmp_id != myid)
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return; /* not our ping */
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if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
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++nreceived;
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tp = (struct timeval *) icmppkt->icmp_data;
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if ((tv.tv_usec -= tp->tv_usec) < 0) {
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--tv.tv_sec;
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tv.tv_usec += 1000000;
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}
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tv.tv_sec -= tp->tv_sec;
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triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
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tsum += triptime;
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if (triptime < tmin)
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tmin = triptime;
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if (triptime > tmax)
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tmax = triptime;
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if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
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++nrepeats;
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--nreceived;
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dupflag = 1;
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} else {
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SET(icmppkt->icmp_seq % MAX_DUP_CHK);
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dupflag = 0;
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}
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if (options & O_QUIET)
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return;
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printf("%d bytes from %s: icmp_seq=%u", sz,
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inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
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icmppkt->icmp_seq);
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printf(" ttl=%d", iphdr->ttl);
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printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
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if (dupflag)
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printf(" (DUP!)");
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printf("\n");
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} else
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if (icmppkt->icmp_type != ICMP_ECHO)
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error_msg("Warning: Got ICMP %d (%s)",
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icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
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}
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static void ping(const char *host)
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{
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struct protoent *proto;
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struct hostent *h;
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char buf[MAXHOSTNAMELEN];
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char packet[datalen + MAXIPLEN + MAXICMPLEN];
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int sockopt;
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proto = getprotobyname("icmp");
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/* if getprotobyname failed, just silently force
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* proto->p_proto to have the correct value for "icmp" */
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if ((pingsock = socket(AF_INET, SOCK_RAW,
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(proto ? proto->p_proto : 1))) < 0) { /* 1 == ICMP */
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if (errno == EPERM)
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error_msg_and_die("permission denied. (are you root?)");
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else
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perror_msg_and_die("creating a raw socket");
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}
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/* drop root privs if running setuid */
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setuid(getuid());
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memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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pingaddr.sin_family = AF_INET;
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if (!(h = gethostbyname(host))) {
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error_msg("unknown host %s", host);
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exit(1);
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}
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if (h->h_addrtype != AF_INET) {
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error_msg("unknown address type; only AF_INET is currently supported.");
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exit(1);
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}
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pingaddr.sin_family = AF_INET; /* h->h_addrtype */
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memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
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strncpy(buf, h->h_name, sizeof(buf) - 1);
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hostname = buf;
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/* enable broadcast pings */
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sockopt = 1;
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setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
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sizeof(sockopt));
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/* set recv buf for broadcast pings */
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sockopt = 48 * 1024;
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setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
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sizeof(sockopt));
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printf("PING %s (%s): %d data bytes\n",
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hostname,
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inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
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datalen);
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signal(SIGINT, pingstats);
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/* start the ping's going ... */
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sendping(0);
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/* listen for replies */
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while (1) {
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struct sockaddr_in from;
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socklen_t fromlen = (socklen_t) sizeof(from);
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int c;
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if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &from, &fromlen)) < 0) {
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if (errno == EINTR)
|
|
continue;
|
|
perror_msg("recvfrom");
|
|
continue;
|
|
}
|
|
unpack(packet, c, &from);
|
|
if (pingcount > 0 && nreceived >= pingcount)
|
|
break;
|
|
}
|
|
pingstats(0);
|
|
}
|
|
|
|
extern int ping_main(int argc, char **argv)
|
|
{
|
|
char *thisarg;
|
|
|
|
datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
|
|
|
|
argc--;
|
|
argv++;
|
|
options = 0;
|
|
/* Parse any options */
|
|
while (argc >= 1 && **argv == '-') {
|
|
thisarg = *argv;
|
|
thisarg++;
|
|
switch (*thisarg) {
|
|
case 'q':
|
|
options |= O_QUIET;
|
|
break;
|
|
case 'c':
|
|
if (--argc <= 0)
|
|
show_usage();
|
|
argv++;
|
|
pingcount = atoi(*argv);
|
|
break;
|
|
case 's':
|
|
if (--argc <= 0)
|
|
show_usage();
|
|
argv++;
|
|
datalen = atoi(*argv);
|
|
break;
|
|
default:
|
|
show_usage();
|
|
}
|
|
argc--;
|
|
argv++;
|
|
}
|
|
if (argc < 1)
|
|
show_usage();
|
|
|
|
myid = getpid() & 0xFFFF;
|
|
ping(*argv);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
#endif /* ! BB_FEATURE_SIMPLE_PING */
|
|
|
|
/*
|
|
* Copyright (c) 1989 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Mike Muuss.
|
|
*
|
|
* 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. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
|
|
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
|
|
*
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
|
*/
|