+/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.8 2000/01/29 05:52:40 erik Exp $
+ * $Id: ping.c,v 1.15 2000/05/12 19:41:47 erik Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
#define MAXPACKET 65468
#define MAX_DUP_CHK (8 * 128)
#define MAXWAIT 10
-#define PINGINTERVAL 1 /* second */
+#define PINGINTERVAL 1 /* second */
#define O_QUIET (1 << 0)
/* 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;
+ }
+
+ if (nleft == 1) {
+ *(unsigned char *) (&ans) = *(unsigned char *) w;
+ sum += ans;
+ }
+
+ sum = (sum >> 16) + (sum & 0xFFFF);
+ sum += (sum >> 16);
+ ans = ~sum;
+ return (ans);
+}
/* simple version */
#ifdef BB_SIMPLE_PING
-static const char* ping_usage = "ping host\n\n";
+static const char *ping_usage = "ping host\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nSend ICMP ECHO_REQUEST packets to network hosts\n"
+#endif
+ ;
-static char* hostname = NULL;
+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)
{
- 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("ping");
+ exit(1);
}
- 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);
+
+ /* 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;
+ }
+ 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);
}
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);
+ exit(TRUE);
}
-#else
+#else
/* 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 and when finished.\n"
-"\t-c COUNT\tSend only COUNT pings.\n";
+static const char *ping_usage = "ping [OPTION]... host\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nSend 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"
+#endif
+ ;
static char *hostname = NULL;
static struct sockaddr_in pingaddr;
/**************************************************************************/
-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 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 sendping(int ign)
{
- 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[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,
+ (int)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);
+ }
}
-
-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 < (DEFDATALEN + 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)
+ fprintf(stderr,
+ "Warning: Got ICMP %d (%s)\n",
+ icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type));
}
static void ping(char *host)
{
- struct protoent *proto=NULL;
- struct hostent *h;
- char buf[MAXHOSTNAMELEN];
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
- int sockopt;
-
- proto = getprotobyname("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[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");
+ }
+ 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;
+
+ /* 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);
}
- unpack(packet, c, &from);
- if (pingcount > 0 && nreceived >= pingcount) break;
- }
- pingstats(0);
+
+ 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;
+ 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");
+ continue;
+ }
+ unpack(packet, c, &from);
+ if (pingcount > 0 && nreceived >= pingcount)
+ break;
+ }
+ 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;
+
+ argc--;
+ argv++;
+ options = 0;
+ /* Parse any options */
+ while (argc >= 1 && **argv == '-') {
+ 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);
}
#endif
projects / oweals / busybox.git / blobdiff