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Some formatting updates (ran the code through indent)

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-Erik
This commit is contained in:
Erik Andersen
2000-02-08 19:58:47 +00:00
parent c0bf817bbc
commit e49d5ecbbe
163 changed files with 27109 additions and 26607 deletions
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588
networking/ping.c
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@@ -1,5 +1,6 @@
/* vi: set sw=4 ts=4: */
/*
* $Id: ping.c,v 1.10 2000/02/07 05:29:42 erik Exp $
* $Id: ping.c,v 1.11 2000/02/08 19:58:47 erik Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
@@ -53,7 +54,7 @@
#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)
@@ -66,118 +67,124 @@
/* 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;
int nleft = sz;
int sum = 0;
unsigned short *w = buf;
unsigned short ans = 0;
while (nleft > 1) {
sum += *w++;
nleft -= 2;
}
while (nleft > 1) {
sum += *w++;
nleft -= 2;
}
if (nleft == 1) {
*(unsigned char *)(&ans) = *(unsigned char *)w;
sum += ans;
}
if (nleft == 1) {
*(unsigned char *) (&ans) = *(unsigned char *) w;
sum += ans;
}
sum = (sum >> 16) + (sum & 0xFFFF);
sum += (sum >> 16);
ans = ~sum;
return(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\n";
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);
}
struct hostent *h;
struct sockaddr_in pingaddr;
struct icmp *pkt;
int pingsock, c;
char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
/* 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 ((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"
"\t\t\tand when finished.\n"
"\t-c COUNT\tSend only COUNT pings.\n";
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;
@@ -196,224 +203,247 @@ 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 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];
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);
pkt = (struct icmp *) packet;
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));
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);
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);
}
gettimeofday((struct timeval *) &packet[8], NULL);
pkt->icmp_cksum = in_cksum((unsigned short *) pkt, 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);
}
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);
}
}
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;
struct icmp *icmppkt;
struct iphdr *iphdr;
struct timeval tv, *tp;
int hlen, dupflag;
unsigned long triptime;
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;
gettimeofday(&tv, NULL);
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;
/* check IP header */
iphdr = (struct iphdr *) buf;
hlen = iphdr->ihl << 2;
/* discard if too short */
if (sz < (DEFDATALEN + ICMP_MINLEN))
return;
if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) {
++nrepeats;
--nreceived;
dupflag = 1;
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;
}
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 {
SET(icmppkt->icmp_seq % MAX_DUP_CHK);
dupflag = 0;
fprintf(stderr,
"Warning: unknown ICMP packet received (not echo-reply)\n");
}
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 ping(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[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);
}
/* drop root privs if running setuid */
setuid(getuid());
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;
memset(&pingaddr, 0, sizeof(struct sockaddr_in));
/* 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;
pingaddr.sin_family = AF_INET;
if (!(h = gethostbyname(host))) {
fprintf(stderr, "ping: unknown host %s\n", host);
exit(1);
}
unpack(packet, c, &from);
if (pingcount > 0 && nreceived >= pingcount) break;
}
pingstats(0);
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;
}
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);
char *thisarg;
myid = getpid() & 0xFFFF;
ping(*argv);
exit(TRUE);
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);
}
#endif