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Ok, so this is reallt 0.38...

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-Erik
This commit is contained in:
Eric Andersen
1999-12-11 08:41:28 +00:00
parent 59248bad97
commit 19db07b3d4
9 changed files with 383 additions and 87 deletions
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166
networking/ping.c
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@@ -1,5 +1,5 @@
/*
* $Id: ping.c,v 1.5 1999/12/09 06:11:36 andersen Exp $
* $Id: ping.c,v 1.6 1999/12/11 08:41:28 andersen Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
@@ -63,28 +63,7 @@
#define CLR(bit) (A(bit) &= (~B(bit)))
#define TST(bit) (A(bit) & B(bit))
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 char *hostname = NULL;
static struct sockaddr_in pingaddr;
static int pingsock = -1;
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 char rcvd_tbl[MAX_DUP_CHK / 8];
static void pingstats(int);
static void sendping(int);
static void unpack(char *, int, struct sockaddr_in *);
static void ping(char *);
static int in_cksum(unsigned short *, int);
/**************************************************************************/
/* common routines */
static int in_cksum(unsigned short *buf, int sz)
{
int nleft = sz;
@@ -108,6 +87,114 @@ static int in_cksum(unsigned short *buf, int sz)
return(ans);
}
/* simple version */
#ifdef BB_SIMPLE_PING
static const char* ping_usage = "ping host\n\n";
static char* hostname = NULL;
static void noresp(int ign)
{
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;
}
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);
}
#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 char *hostname = NULL;
static struct sockaddr_in pingaddr;
static int pingsock = -1;
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 char rcvd_tbl[MAX_DUP_CHK / 8];
static void sendping(int);
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);
@@ -249,25 +336,21 @@ static void ping(char *host)
memset(&pingaddr, 0, sizeof(struct sockaddr_in));
pingaddr.sin_family = AF_INET;
if (inet_aton(host, &pingaddr.sin_addr)) {
hostname = host;
} else {
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;
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));
@@ -331,6 +414,7 @@ extern int ping_main(int argc, char **argv)
ping(*argv);
exit(TRUE);
}
#endif
/*
* Copyright (c) 1989 The Regents of the University of California.
@@ -367,5 +451,3 @@ extern int ping_main(int argc, char **argv)
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/