/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.11 2000/02/08 19:58:47 erik Exp $
+ * $Id: ping.c,v 1.56 2004/03/15 08:28:48 andersen Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * This version of ping is adapted from the ping in netkit-base 0.10,
- * which is:
- *
+ * Adapted from the ping in netkit-base 0.10:
* Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
+ * Derived from software contributed to Berkeley by Mike Muuss.
*
- * This code is derived from software contributed to Berkeley by
- * Mike Muuss.
- *
- * Original copyright notice is retained at the end of this file.
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include "internal.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/times.h>
-#include <sys/signal.h>
+#include <signal.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "busybox.h"
+
-#define DEFDATALEN 56
-#define MAXIPLEN 60
-#define MAXICMPLEN 76
-#define MAXPACKET 65468
-#define MAX_DUP_CHK (8 * 128)
-#define MAXWAIT 10
-#define PINGINTERVAL 1 /* second */
+enum {
+ DEFDATALEN = 56,
+ MAXIPLEN = 60,
+ MAXICMPLEN = 76,
+ MAXPACKET = 65468,
+ MAX_DUP_CHK = (8 * 128),
+ MAXWAIT = 10,
+ PINGINTERVAL = 1 /* second */
+};
#define O_QUIET (1 << 0)
#define CLR(bit) (A(bit) &= (~B(bit)))
#define TST(bit) (A(bit) & B(bit))
+static void ping(const char *host);
+
/* common routines */
static int in_cksum(unsigned short *buf, int sz)
{
}
/* simple version */
-#ifdef BB_SIMPLE_PING
-static const char *ping_usage = "ping host\n\n";
-
+#ifndef CONFIG_FEATURE_FANCY_PING
static char *hostname = NULL;
-
static void noresp(int ign)
{
printf("No response from %s\n", hostname);
- exit(0);
+ exit(EXIT_FAILURE);
}
-static int ping(const char *host)
+static void ping(const char *host)
{
struct hostent *h;
struct sockaddr_in pingaddr;
int pingsock, c;
char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
- if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) { /* 1 == ICMP */
- perror("ping");
- exit(1);
- }
-
- /* drop root privs if running setuid */
- setuid(getuid());
+ pingsock = create_icmp_socket();
memset(&pingaddr, 0, sizeof(struct sockaddr_in));
pingaddr.sin_family = AF_INET;
- if (!(h = gethostbyname(host))) {
- fprintf(stderr, "ping: unknown host %s\n", host);
- exit(1);
- }
+ h = xgethostbyname(host);
memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
hostname = h->h_name;
pkt->icmp_type = ICMP_ECHO;
pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
- c = sendto(pingsock, packet, sizeof(packet), 0,
+ c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0,
(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
- if (c < 0 || c != sizeof(packet)) {
- if (c < 0)
- perror("ping");
- fprintf(stderr, "ping: write incomplete\n");
- exit(1);
- }
+ if (c < 0 || c != sizeof(packet))
+ bb_perror_msg_and_die("sendto");
signal(SIGALRM, noresp);
alarm(5); /* give the host 5000ms to respond */
/* listen for replies */
while (1) {
struct sockaddr_in from;
- size_t fromlen = sizeof(from);
+ socklen_t fromlen = sizeof(from);
if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
(struct sockaddr *) &from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
- perror("ping");
+ bb_perror_msg("recvfrom");
continue;
}
if (c >= 76) { /* ip + icmp */
}
}
printf("%s is alive!\n", hostname);
- return (TRUE);
+ return;
}
-extern int ping_main(int argc, char **argv)
+int ping_main(int argc, char **argv)
{
argc--;
argv++;
if (argc < 1)
- usage(ping_usage);
+ bb_show_usage();
ping(*argv);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#else
+#else /* ! CONFIG_FEATURE_FANCY_PING */
/* full(er) version */
-static const char *ping_usage = "ping [OPTION]... host\n\n"
- "Send ICMP ECHO_REQUEST packets to network hosts.\n\n"
- "Options:\n"
- "\t-q\t\tQuiet mode, only displays output at start"
-
- "\t\t\tand when finished.\n" "\t-c COUNT\tSend only COUNT pings.\n";
-
-static char *hostname = NULL;
static struct sockaddr_in pingaddr;
static int pingsock = -1;
+static int datalen; /* intentionally uninitialized to work around gcc bug */
-static long ntransmitted = 0, nreceived = 0, nrepeats = 0, pingcount = 0;
-static int myid = 0, options = 0;
-static unsigned long tmin = ULONG_MAX, tmax = 0, tsum = 0;
+static long ntransmitted, nreceived, nrepeats, pingcount;
+static int myid, options;
+static unsigned long tmin = ULONG_MAX, tmax, tsum;
static char rcvd_tbl[MAX_DUP_CHK / 8];
+#ifndef CONFIG_FEATURE_FANCY_PING6
+static
+#endif
+ struct hostent *hostent;
+
static void sendping(int);
static void pingstats(int);
static void unpack(char *, int, struct sockaddr_in *);
-static void ping(char *);
-
/**************************************************************************/
-static void pingstats(int ign)
+static void pingstats(int junk)
{
+ int status;
+
signal(SIGINT, SIG_IGN);
- printf("\n--- %s ping statistics ---\n", hostname);
+ printf("\n--- %s ping statistics ---\n", hostent->h_name);
printf("%ld packets transmitted, ", ntransmitted);
printf("%ld packets received, ", nreceived);
if (nrepeats)
tmin / 10, tmin % 10,
(tsum / (nreceived + nrepeats)) / 10,
(tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
- exit(0);
+ if (nreceived != 0)
+ status = EXIT_SUCCESS;
+ else
+ status = EXIT_FAILURE;
+ exit(status);
}
-static void sendping(int ign)
+static void sendping(int junk)
{
struct icmp *pkt;
int i;
- char packet[DEFDATALEN + 8];
+ char packet[datalen + ICMP_MINLEN];
pkt = (struct icmp *) packet;
pkt->icmp_type = ICMP_ECHO;
pkt->icmp_code = 0;
pkt->icmp_cksum = 0;
- pkt->icmp_seq = ntransmitted++;
+ pkt->icmp_seq = htons(ntransmitted++);
pkt->icmp_id = myid;
- CLR(pkt->icmp_seq % MAX_DUP_CHK);
+ CLR(ntohs(pkt->icmp_seq) % MAX_DUP_CHK);
- gettimeofday((struct timeval *) &packet[8], NULL);
+ gettimeofday((struct timeval *) &pkt->icmp_dun, NULL);
pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
i = sendto(pingsock, packet, sizeof(packet), 0,
(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
- if (i < 0 || i != sizeof(packet)) {
- if (i < 0)
- perror("ping");
- fprintf(stderr, "ping wrote %d chars; %d expected\n", i,
- sizeof(packet));
- exit(1);
- }
+ if (i < 0)
+ bb_perror_msg_and_die("sendto");
+ else if ((size_t)i != sizeof(packet))
+ bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
+ (int)sizeof(packet));
signal(SIGALRM, sendping);
if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
}
}
+static char *icmp_type_name (int id)
+{
+ switch (id) {
+ case ICMP_ECHOREPLY: return "Echo Reply";
+ case ICMP_DEST_UNREACH: return "Destination Unreachable";
+ case ICMP_SOURCE_QUENCH: return "Source Quench";
+ case ICMP_REDIRECT: return "Redirect (change route)";
+ case ICMP_ECHO: return "Echo Request";
+ case ICMP_TIME_EXCEEDED: return "Time Exceeded";
+ case ICMP_PARAMETERPROB: return "Parameter Problem";
+ case ICMP_TIMESTAMP: return "Timestamp Request";
+ case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
+ case ICMP_INFO_REQUEST: return "Information Request";
+ case ICMP_INFO_REPLY: return "Information Reply";
+ case ICMP_ADDRESS: return "Address Mask Request";
+ case ICMP_ADDRESSREPLY: return "Address Mask Reply";
+ default: return "unknown ICMP type";
+ }
+}
+
static void unpack(char *buf, int sz, struct sockaddr_in *from)
{
struct icmp *icmppkt;
iphdr = (struct iphdr *) buf;
hlen = iphdr->ihl << 2;
/* discard if too short */
- if (sz < (DEFDATALEN + ICMP_MINLEN))
+ if (sz < (datalen + ICMP_MINLEN))
return;
sz -= hlen;
icmppkt = (struct icmp *) (buf + hlen);
+ if (icmppkt->icmp_id != myid)
+ return; /* not our ping */
+
if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
- if (icmppkt->icmp_id != myid)
- return; /* not our ping */
- ++nreceived;
+ u_int16_t recv_seq = ntohs(icmppkt->icmp_seq);
+ ++nreceived;
tp = (struct timeval *) icmppkt->icmp_data;
if ((tv.tv_usec -= tp->tv_usec) < 0) {
if (triptime > tmax)
tmax = triptime;
- if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
+ if (TST(recv_seq % MAX_DUP_CHK)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
- SET(icmppkt->icmp_seq % MAX_DUP_CHK);
+ SET(recv_seq % MAX_DUP_CHK);
dupflag = 0;
}
printf("%d bytes from %s: icmp_seq=%u", sz,
inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
- icmppkt->icmp_seq);
+ recv_seq);
printf(" ttl=%d", iphdr->ttl);
printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
if (dupflag)
printf(" (DUP!)");
printf("\n");
- } else {
- fprintf(stderr,
- "Warning: unknown ICMP packet received (not echo-reply)\n");
- }
+ } else
+ if (icmppkt->icmp_type != ICMP_ECHO)
+ bb_error_msg("Warning: Got ICMP %d (%s)",
+ icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
+ fflush(stdout);
}
-static void ping(char *host)
+static void ping(const char *host)
{
- struct protoent *proto;
- struct hostent *h;
- char buf[MAXHOSTNAMELEN];
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+ char packet[datalen + MAXIPLEN + MAXICMPLEN];
int sockopt;
- proto = getprotobyname("icmp");
- /* if getprotobyname failed, just silently force
- * proto->p_proto to have the correct value for "icmp" */
- if ((pingsock = socket(AF_INET, SOCK_RAW,
- (proto ? proto->p_proto : 1))) < 0) { /* 1 == ICMP */
- if (errno == EPERM) {
- fprintf(stderr, "ping: permission denied. (are you root?)\n");
- } else {
- perror("ping");
- }
- exit(1);
- }
-
- /* drop root privs if running setuid */
- setuid(getuid());
+ pingsock = create_icmp_socket();
memset(&pingaddr, 0, sizeof(struct sockaddr_in));
pingaddr.sin_family = AF_INET;
- if (!(h = gethostbyname(host))) {
- fprintf(stderr, "ping: unknown host %s\n", host);
- exit(1);
- }
-
- if (h->h_addrtype != AF_INET) {
- fprintf(stderr,
- "ping: unknown address type; only AF_INET is currently supported.\n");
- exit(1);
- }
+ hostent = xgethostbyname(host);
+ if (hostent->h_addrtype != AF_INET)
+ bb_error_msg_and_die("unknown address type; only AF_INET is currently supported.");
- pingaddr.sin_family = AF_INET; /* h->h_addrtype */
- memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
- strncpy(buf, h->h_name, sizeof(buf) - 1);
- hostname = buf;
+ memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr));
/* enable broadcast pings */
sockopt = 1;
sizeof(sockopt));
printf("PING %s (%s): %d data bytes\n",
- hostname,
+ hostent->h_name,
inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
- DEFDATALEN);
+ datalen);
signal(SIGINT, pingstats);
/* listen for replies */
while (1) {
struct sockaddr_in from;
- size_t fromlen = sizeof(from);
+ socklen_t fromlen = (socklen_t) sizeof(from);
int c;
if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
(struct sockaddr *) &from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
- perror("ping");
+ bb_perror_msg("recvfrom");
continue;
}
unpack(packet, c, &from);
pingstats(0);
}
-extern int ping_main(int argc, char **argv)
+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) {
- if (**argv != '-')
- usage(ping_usage);
+ while (argc >= 1 && **argv == '-') {
thisarg = *argv;
thisarg++;
switch (*thisarg) {
options |= O_QUIET;
break;
case 'c':
- argc--;
+ if (--argc <= 0)
+ bb_show_usage();
argv++;
pingcount = atoi(*argv);
break;
+ case 's':
+ if (--argc <= 0)
+ bb_show_usage();
+ argv++;
+ datalen = atoi(*argv);
+ break;
default:
- usage(ping_usage);
+ bb_show_usage();
}
argc--;
argv++;
}
if (argc < 1)
- usage(ping_usage);
+ bb_show_usage();
myid = getpid() & 0xFFFF;
ping(*argv);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#endif
-
-/*
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 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.
- */
+#endif /* ! CONFIG_FEATURE_FANCY_PING */
projects / oweals / busybox.git / blobdiff