/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.26 2000/11/14 23:29:24 andersen Exp $
+ * $Id: ping.c,v 1.55 2003/07/22 08:56:51 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 "busybox.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 ! defined __GLIBC__ && ! defined __UCLIBC__
-typedef unsigned int socklen_t;
-
-#define 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)
}
/* simple version */
-#ifdef BB_FEATURE_SIMPLE_PING
+#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 void ping(const char *host)
int pingsock, c;
char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
- if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) { /* 1 == ICMP */
- perror("ping: creating a raw socket");
- 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))) {
- errorMsg("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;
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: sendto");
- errorMsg("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 */
(struct sockaddr *) &from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
- perror("ping: recvfrom");
+ bb_perror_msg("recvfrom");
continue;
}
if (c >= 76) { /* ip + icmp */
argc--;
argv++;
if (argc < 1)
- usage(ping_usage);
+ bb_show_usage();
ping(*argv);
- exit(TRUE);
+ return EXIT_SUCCESS;
}
-#else /* ! BB_FEATURE_SIMPLE_PING */
+#else /* ! CONFIG_FEATURE_FANCY_PING */
/* full(er) version */
-static char *hostname = NULL;
static struct sockaddr_in pingaddr;
static int pingsock = -1;
-static int datalen = DEFDATALEN;
+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];
+struct hostent *hostent;
+
static void sendping(int);
static void pingstats(int);
static void unpack(char *, int, struct sockaddr_in *);
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)
(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
if (i < 0)
- fatalError("sendto: %s\n", strerror(errno));
+ bb_perror_msg_and_die("sendto");
else if ((size_t)i != sizeof(packet))
- fatalError("ping wrote %d chars; %d expected\n", i,
+ bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
(int)sizeof(packet));
signal(SIGALRM, sendping);
printf("\n");
} else
if (icmppkt->icmp_type != ICMP_ECHO)
- errorMsg("Warning: Got ICMP %d (%s)\n",
+ bb_error_msg("Warning: Got ICMP %d (%s)",
icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
}
static void ping(const char *host)
{
- struct protoent *proto;
- struct hostent *h;
- char buf[MAXHOSTNAMELEN];
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) {
- errorMsg("permission denied. (are you root?)\n");
- } else {
- perror("ping: creating a raw socket");
- }
- 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))) {
- errorMsg("unknown host %s\n", host);
- exit(1);
- }
-
- if (h->h_addrtype != AF_INET) {
- errorMsg("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),
datalen);
(struct sockaddr *) &from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
- perror("ping: recvfrom");
+ bb_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;
break;
case 'c':
if (--argc <= 0)
- usage(ping_usage);
+ bb_show_usage();
argv++;
pingcount = atoi(*argv);
break;
case 's':
if (--argc <= 0)
- usage(ping_usage);
+ 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);
- return(TRUE);
+ return EXIT_SUCCESS;
}
-#endif /* ! BB_FEATURE_SIMPLE_PING */
+#endif /* ! CONFIG_FEATURE_FANCY_PING */
/*
* Copyright (c) 1989 The Regents of the University of California.
projects / oweals / busybox.git / blobdiff