+/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.10 2000/02/07 05:29:42 erik Exp $
+ * $Id: ping.c,v 1.35 2001/01/27 08:24:37 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 "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>
+
+
+/* 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;
+
+static const int ICMP_MINLEN = 8; /* abs minimum */
+
+struct icmp_ra_addr
+{
+ u_int32_t ira_addr;
+ u_int32_t ira_preference;
+};
-#define DEFDATALEN 56
-#define MAXIPLEN 60
-#define MAXICMPLEN 76
-#define MAXPACKET 65468
+
+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
+
+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)
{
- int nleft = sz;
- int sum = 0;
- unsigned short *w = buf;
- unsigned short ans = 0;
-
- while (nleft > 1) {
- sum += *w++;
- nleft -= 2;
- }
-
- if (nleft == 1) {
- *(unsigned char *)(&ans) = *(unsigned char *)w;
- sum += ans;
- }
-
- sum = (sum >> 16) + (sum & 0xFFFF);
- sum += (sum >> 16);
- ans = ~sum;
- return(ans);
-}
+ int nleft = sz;
+ int sum = 0;
+ unsigned short *w = buf;
+ unsigned short ans = 0;
+
+ while (nleft > 1) {
+ sum += *w++;
+ nleft -= 2;
+ }
-/* simple version */
-#ifdef BB_SIMPLE_PING
-static const char* ping_usage = "ping host\n\n";
+ if (nleft == 1) {
+ *(unsigned char *) (&ans) = *(unsigned char *) w;
+ sum += ans;
+ }
+
+ sum = (sum >> 16) + (sum & 0xFFFF);
+ sum += (sum >> 16);
+ ans = ~sum;
+ return (ans);
+}
-static char* hostname = NULL;
+/* simple version */
+#ifdef BB_FEATURE_SIMPLE_PING
+static char *hostname = NULL;
static void noresp(int ign)
{
- printf("No response from %s\n", hostname);
- exit(0);
+ printf("No response from %s\n", hostname);
+ exit(0);
}
-static int ping(const char *host)
+static void ping(const char *host)
{
- struct hostent *h;
- struct sockaddr_in pingaddr;
- struct icmp *pkt;
- 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());
-
- 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);
- }
- memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
- hostname = h->h_name;
-
- pkt = (struct icmp *)packet;
- memset(pkt, 0, sizeof(packet));
- pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_cksum = in_cksum((unsigned short *)pkt, sizeof(packet));
-
- 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);
- }
-
- 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);
-
- if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *)&from, &fromlen)) < 0) {
- if (errno == EINTR) continue;
- perror("ping");
- continue;
+ struct hostent *h;
+ struct sockaddr_in pingaddr;
+ struct icmp *pkt;
+ int pingsock, c;
+ char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+
+ 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());
+
+ memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+ pingaddr.sin_family = AF_INET;
+ if (!(h = gethostbyname(host))) {
+ error_msg("unknown host %s\n", host);
+ exit(1);
+ }
+ memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr));
+ hostname = h->h_name;
+
+ pkt = (struct icmp *) packet;
+ memset(pkt, 0, sizeof(packet));
+ pkt->icmp_type = ICMP_ECHO;
+ pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
+
+ c = sendto(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
+
+ if (c < 0 || c != sizeof(packet))
+ 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);
+
+ if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
+ (struct sockaddr *) &from, &fromlen)) < 0) {
+ if (errno == EINTR)
+ continue;
+ perror_msg("recvfrom");
+ continue;
+ }
+ if (c >= 76) { /* ip + icmp */
+ struct iphdr *iphdr = (struct iphdr *) packet;
+
+ pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */
+ if (pkt->icmp_type == ICMP_ECHOREPLY)
+ break;
+ }
}
- if (c >= 76) { /* ip + icmp */
- struct iphdr *iphdr = (struct iphdr *)packet;
- pkt = (struct icmp *)(packet + (iphdr->ihl << 2)); /* skip ip hdr */
- if (pkt->icmp_type == ICMP_ECHOREPLY) break;
- }
- }
- printf("%s is alive!\n", hostname);
- return(TRUE);
+ printf("%s is alive!\n", hostname);
+ return;
}
extern int ping_main(int argc, char **argv)
{
- argc--;
- argv++;
- if (argc < 1) usage(ping_usage);
- ping(*argv);
- exit(TRUE);
+ argc--;
+ argv++;
+ if (argc < 1)
+ usage(ping_usage);
+ ping(*argv);
+ 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-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 void pingstats(int);
static void unpack(char *, int, struct sockaddr_in *);
-static void ping(char *);
-
/**************************************************************************/
-static void pingstats(int ign) {
- signal(SIGINT, SIG_IGN);
-
- printf("\n--- %s ping statistics ---\n", hostname);
- printf("%ld packets transmitted, ", ntransmitted);
- printf("%ld packets received, ", nreceived);
- if (nrepeats)
- printf("%ld duplicates, ", nrepeats);
- if (ntransmitted)
- printf("%ld%% packet loss\n",
- (ntransmitted - nreceived)*100/ntransmitted);
- if (nreceived)
- printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
- tmin/10, tmin%10,
- (tsum/(nreceived+nrepeats))/10,
- (tsum/(nreceived+nrepeats))%10,
- tmax/10, tmax%10);
- exit(0);
+static void pingstats(int junk)
+{
+ int status;
+
+ signal(SIGINT, SIG_IGN);
+
+ printf("\n--- %s ping statistics ---\n", hostname);
+ printf("%ld packets transmitted, ", ntransmitted);
+ printf("%ld packets received, ", nreceived);
+ if (nrepeats)
+ printf("%ld duplicates, ", nrepeats);
+ if (ntransmitted)
+ printf("%ld%% packet loss\n",
+ (ntransmitted - nreceived) * 100 / ntransmitted);
+ if (nreceived)
+ printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
+ tmin / 10, tmin % 10,
+ (tsum / (nreceived + nrepeats)) / 10,
+ (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
+ 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];
-
- pkt = (struct icmp *)packet;
-
- pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_code = 0;
- pkt->icmp_cksum = 0;
- pkt->icmp_seq = ntransmitted++;
- pkt->icmp_id = myid;
- CLR(pkt->icmp_seq % MAX_DUP_CHK);
-
- gettimeofday((struct timeval *)&packet[8], 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);
- }
-
- signal(SIGALRM, sendping);
- if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
- alarm(PINGINTERVAL);
- } else { /* done, wait for the last ping to come back */
- /* todo, don't necessarily need to wait so long... */
- signal(SIGALRM, pingstats);
- alarm(MAXWAIT);
- }
+ struct icmp *pkt;
+ int i;
+ char packet[datalen + 8];
+
+ pkt = (struct icmp *) packet;
+
+ pkt->icmp_type = ICMP_ECHO;
+ pkt->icmp_code = 0;
+ pkt->icmp_cksum = 0;
+ pkt->icmp_seq = ntransmitted++;
+ pkt->icmp_id = myid;
+ CLR(pkt->icmp_seq % MAX_DUP_CHK);
+
+ gettimeofday((struct timeval *) &packet[8], 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)
+ perror_msg_and_die("sendto");
+ else if ((size_t)i != sizeof(packet))
+ error_msg_and_die("ping wrote %d chars; %d expected\n", i,
+ (int)sizeof(packet));
+
+ signal(SIGALRM, sendping);
+ if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
+ alarm(PINGINTERVAL);
+ } else { /* done, wait for the last ping to come back */
+ /* todo, don't necessarily need to wait so long... */
+ signal(SIGALRM, pingstats);
+ alarm(MAXWAIT);
+ }
}
-
-static void unpack(char *buf, int sz, struct sockaddr_in *from)
+
+static char *icmp_type_name (int id)
{
- struct icmp *icmppkt;
- struct iphdr *iphdr;
- struct timeval tv, *tp;
- int hlen, dupflag;
- unsigned long triptime;
-
- gettimeofday(&tv, NULL);
-
- /* check IP header */
- iphdr = (struct iphdr *)buf;
- hlen = iphdr->ihl << 2;
- /* discard if too short */
- if (sz < (DEFDATALEN + ICMP_MINLEN)) return;
-
- sz -= hlen;
- icmppkt = (struct icmp *)(buf + hlen);
-
- if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
- if (icmppkt->icmp_id != myid) return; /* not our ping */
- ++nreceived;
- tp = (struct timeval *)icmppkt->icmp_data;
-
- if ((tv.tv_usec -= tp->tv_usec) < 0) {
- --tv.tv_sec;
- tv.tv_usec += 1000000;
- }
- tv.tv_sec -= tp->tv_sec;
-
- triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
- tsum += triptime;
- if (triptime < tmin) tmin = triptime;
- if (triptime > tmax) tmax = triptime;
-
- if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
- ++nrepeats;
- --nreceived;
- dupflag = 1;
- } else {
- SET(icmppkt->icmp_seq % MAX_DUP_CHK);
- dupflag = 0;
+ 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";
}
+}
- if (options & O_QUIET) return;
-
- printf("%d bytes from %s: icmp_seq=%u", sz,
- inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
- icmppkt->icmp_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");
- }
+static void unpack(char *buf, int sz, struct sockaddr_in *from)
+{
+ struct icmp *icmppkt;
+ struct iphdr *iphdr;
+ struct timeval tv, *tp;
+ int hlen, dupflag;
+ unsigned long triptime;
+
+ gettimeofday(&tv, NULL);
+
+ /* check IP header */
+ iphdr = (struct iphdr *) buf;
+ hlen = iphdr->ihl << 2;
+ /* discard if too short */
+ 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) {
+ ++nreceived;
+ tp = (struct timeval *) icmppkt->icmp_data;
+
+ if ((tv.tv_usec -= tp->tv_usec) < 0) {
+ --tv.tv_sec;
+ tv.tv_usec += 1000000;
+ }
+ tv.tv_sec -= tp->tv_sec;
+
+ triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
+ tsum += triptime;
+ if (triptime < tmin)
+ tmin = triptime;
+ if (triptime > tmax)
+ tmax = triptime;
+
+ if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
+ ++nrepeats;
+ --nreceived;
+ dupflag = 1;
+ } else {
+ SET(icmppkt->icmp_seq % MAX_DUP_CHK);
+ dupflag = 0;
+ }
+
+ if (options & O_QUIET)
+ return;
+
+ printf("%d bytes from %s: icmp_seq=%u", sz,
+ inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
+ icmppkt->icmp_seq);
+ printf(" ttl=%d", iphdr->ttl);
+ printf(" time=%lu.%lu ms", triptime / 10, triptime % 10);
+ if (dupflag)
+ printf(" (DUP!)");
+ printf("\n");
+ } else
+ if (icmppkt->icmp_type != ICMP_ECHO)
+ error_msg("Warning: Got ICMP %d (%s)\n",
+ 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];
- 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");
+ 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)
+ error_msg_and_die("permission denied. (are you root?)\n");
+ else
+ perror_msg_and_die("creating a raw socket");
+ }
+
+ /* drop root privs if running setuid */
+ setuid(getuid());
+
+ memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+
+ pingaddr.sin_family = AF_INET;
+ if (!(h = gethostbyname(host))) {
+ error_msg("unknown host %s\n", host);
+ exit(1);
}
- exit(1);
- }
-
- /* drop root privs if running setuid */
- setuid(getuid());
-
- 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);
- }
-
- 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;
-
- /* enable broadcast pings */
- sockopt = 1;
- setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *)&sockopt, sizeof(sockopt));
-
- /* set recv buf for broadcast pings */
- sockopt = 48 * 1024;
- setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *)&sockopt, sizeof(sockopt));
-
- printf("PING %s (%s): %d data bytes\n",
- hostname, inet_ntoa(*(struct in_addr *)&pingaddr.sin_addr.s_addr),
- DEFDATALEN);
-
- signal(SIGINT, pingstats);
-
- /* start the ping's going ... */
- sendping(0);
-
- /* listen for replies */
- while (1) {
- struct sockaddr_in from;
- size_t fromlen = sizeof(from);
- int c;
-
- if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
- (struct sockaddr *)&from, &fromlen)) < 0) {
- if (errno == EINTR) continue;
- perror("ping");
- continue;
+
+ if (h->h_addrtype != AF_INET) {
+ error_msg("unknown address type; only AF_INET is currently supported.\n");
+ exit(1);
+ }
+
+ 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;
+
+ /* enable broadcast pings */
+ sockopt = 1;
+ setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
+ sizeof(sockopt));
+
+ /* set recv buf for broadcast pings */
+ sockopt = 48 * 1024;
+ setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
+ sizeof(sockopt));
+
+ printf("PING %s (%s): %d data bytes\n",
+ hostname,
+ inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr),
+ datalen);
+
+ signal(SIGINT, pingstats);
+
+ /* start the ping's going ... */
+ sendping(0);
+
+ /* listen for replies */
+ while (1) {
+ struct sockaddr_in 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_msg("recvfrom");
+ continue;
+ }
+ unpack(packet, c, &from);
+ if (pingcount > 0 && nreceived >= pingcount)
+ break;
}
- unpack(packet, c, &from);
- if (pingcount > 0 && nreceived >= pingcount) break;
- }
- pingstats(0);
+ pingstats(0);
}
extern int ping_main(int argc, char **argv)
{
- char *thisarg;
-
- argc--;
- argv++;
- options = 0;
- /* Parse any options */
- while (argc > 1) {
- if (**argv != '-') usage(ping_usage);
- thisarg = *argv; thisarg++;
- switch (*thisarg) {
- case 'q': options |= O_QUIET; break;
- case 'c':
- argc--; argv++;
- pingcount = atoi(*argv);
- break;
- default:
- usage(ping_usage);
- }
- argc--; argv++;
- }
- if (argc < 1) usage(ping_usage);
-
- myid = getpid() & 0xFFFF;
- ping(*argv);
- exit(TRUE);
+ 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)
+ usage(ping_usage);
+ argv++;
+ pingcount = atoi(*argv);
+ break;
+ case 's':
+ if (--argc <= 0)
+ usage(ping_usage);
+ argv++;
+ datalen = atoi(*argv);
+ break;
+ default:
+ usage(ping_usage);
+ }
+ argc--;
+ argv++;
+ }
+ if (argc < 1)
+ usage(ping_usage);
+
+ myid = getpid() & 0xFFFF;
+ ping(*argv);
+ 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