/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.14 2000/04/25 23:24:55 erik Exp $
+ * $Id: ping.c,v 1.40 2001/04/09 23:52:18 andersen Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
* Original copyright notice is retained at the end of this file.
*/
-#include "internal.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "busybox.h"
+
+
+/* It turns out that libc5 doesn't have proper icmp support
+ * built into it header files, so we have to supplement it */
+#if __GNU_LIBRARY__ < 5
+static const int ICMP_MINLEN = 8; /* abs minimum */
+
+struct icmp_ra_addr
+{
+ u_int32_t ira_addr;
+ u_int32_t ira_preference;
+};
+
+
+struct icmp
+{
+ u_int8_t icmp_type; /* type of message, see below */
+ u_int8_t icmp_code; /* type sub code */
+ u_int16_t icmp_cksum; /* ones complement checksum of struct */
+ union
+ {
+ u_char ih_pptr; /* ICMP_PARAMPROB */
+ struct in_addr ih_gwaddr; /* gateway address */
+ struct ih_idseq /* echo datagram */
+ {
+ u_int16_t icd_id;
+ u_int16_t icd_seq;
+ } ih_idseq;
+ u_int32_t ih_void;
+
+ /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
+ struct ih_pmtu
+ {
+ u_int16_t ipm_void;
+ u_int16_t ipm_nextmtu;
+ } ih_pmtu;
+
+ struct ih_rtradv
+ {
+ u_int8_t irt_num_addrs;
+ u_int8_t irt_wpa;
+ u_int16_t irt_lifetime;
+ } ih_rtradv;
+ } icmp_hun;
+#define icmp_pptr icmp_hun.ih_pptr
+#define icmp_gwaddr icmp_hun.ih_gwaddr
+#define icmp_id icmp_hun.ih_idseq.icd_id
+#define icmp_seq icmp_hun.ih_idseq.icd_seq
+#define icmp_void icmp_hun.ih_void
+#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
+#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
+#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
+#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
+#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
+ union
+ {
+ struct
+ {
+ u_int32_t its_otime;
+ u_int32_t its_rtime;
+ u_int32_t its_ttime;
+ } id_ts;
+ struct
+ {
+ struct ip idi_ip;
+ /* options and then 64 bits of data */
+ } id_ip;
+ struct icmp_ra_addr id_radv;
+ u_int32_t id_mask;
+ u_int8_t id_data[1];
+ } icmp_dun;
+#define icmp_otime icmp_dun.id_ts.its_otime
+#define icmp_rtime icmp_dun.id_ts.its_rtime
+#define icmp_ttime icmp_dun.id_ts.its_ttime
+#define icmp_ip icmp_dun.id_ip.idi_ip
+#define icmp_radv icmp_dun.id_radv
+#define icmp_mask icmp_dun.id_mask
+#define icmp_data icmp_dun.id_data
+};
+#endif
-#define DEFDATALEN 56
-#define MAXIPLEN 60
-#define MAXICMPLEN 76
-#define MAXPACKET 65468
+static const int DEFDATALEN = 56;
+static const int MAXIPLEN = 60;
+static const int MAXICMPLEN = 76;
+static const int MAXPACKET = 65468;
#define MAX_DUP_CHK (8 * 128)
-#define MAXWAIT 10
-#define PINGINTERVAL 1 /* second */
+static const int MAXWAIT = 10;
+static const int 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";
-
+#ifdef BB_FEATURE_SIMPLE_PING
static char *hostname = NULL;
static void noresp(int ign)
exit(0);
}
-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);
- }
+ if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) /* 1 == ICMP */
+ perror_msg_and_die("creating a raw socket");
/* drop root privs if running setuid */
setuid(getuid());
pingaddr.sin_family = AF_INET;
if (!(h = gethostbyname(host))) {
- fprintf(stderr, "ping: unknown host %s\n", host);
+ error_msg("unknown host %s", host);
exit(1);
}
memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
c = sendto(pingsock, packet, sizeof(packet), 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))
+ perror_msg_and_die("sendto");
signal(SIGALRM, noresp);
alarm(5); /* give the host 5000ms to respond */
(struct sockaddr *) &from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
- perror("ping");
+ 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)
argc--;
argv++;
if (argc < 1)
- usage(ping_usage);
+ show_usage();
ping(*argv);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#else
+#else /* ! BB_FEATURE_SIMPLE_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-c COUNT\tSend only COUNT pings.\n"
- "\t-q\t\tQuiet mode, only displays output at start\n"
- "\t\t\tand when finished.\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 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);
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 + 8];
pkt = (struct icmp *) 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,
- (int)sizeof(packet));
- exit(1);
- }
+ if (i < 0)
+ perror_msg_and_die("sendto");
+ else if ((size_t)i != sizeof(packet))
+ 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 */
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;
printf("\n");
} else
if (icmppkt->icmp_type != ICMP_ECHO)
- fprintf(stderr,
- "Warning: Got ICMP %d (%s)\n",
+ error_msg("Warning: Got ICMP %d (%s)",
icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
}
-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");
* 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);
+ if (errno == EPERM)
+ error_msg_and_die("permission denied. (are you root?)");
+ else
+ perror_msg_and_die("creating a raw socket");
}
/* drop root privs if running setuid */
pingaddr.sin_family = AF_INET;
if (!(h = gethostbyname(host))) {
- fprintf(stderr, "ping: unknown host %s\n", host);
+ error_msg("unknown host %s", host);
exit(1);
}
if (h->h_addrtype != AF_INET) {
- fprintf(stderr,
- "ping: unknown address type; only AF_INET is currently supported.\n");
+ error_msg("unknown address type; only AF_INET is currently supported.");
exit(1);
}
printf("PING %s (%s): %d data bytes\n",
hostname,
inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
- DEFDATALEN);
+ datalen);
signal(SIGINT, pingstats);
(struct sockaddr *) &from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
- perror("ping");
+ perror_msg("recvfrom");
continue;
}
unpack(packet, c, &from);
{
char *thisarg;
+ datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
+
argc--;
argv++;
options = 0;
options |= O_QUIET;
break;
case 'c':
- argc--;
+ if (--argc <= 0)
+ show_usage();
argv++;
pingcount = atoi(*argv);
break;
+ case 's':
+ if (--argc <= 0)
+ show_usage();
+ argv++;
+ datalen = atoi(*argv);
+ break;
default:
- usage(ping_usage);
+ show_usage();
}
argc--;
argv++;
}
if (argc < 1)
- usage(ping_usage);
+ show_usage();
myid = getpid() & 0xFFFF;
ping(*argv);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#endif
+#endif /* ! BB_FEATURE_SIMPLE_PING */
/*
* Copyright (c) 1989 The Regents of the University of California.
* 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.
+ *
+ * 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.
projects / oweals / busybox.git / blobdiff