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copy fixes to simplify link copying and always do the right thing.

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ping could segfault because I'm an idiot, and tried to put a value
in where I hadn't allocated storage.  choke.
 -Erik
This commit is contained in:
Erik Andersen
2000-01-29 05:52:40 +00:00
parent d7a44c76fe
commit 8e759aa31f
3 changed files with 16 additions and 26 deletions
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12
ping.c
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@ -1,5 +1,5 @@
/*
* $Id: ping.c,v 1.7 2000/01/26 20:06:48 erik Exp $
* $Id: ping.c,v 1.8 2000/01/29 05:52:40 erik Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
@ -312,18 +312,14 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from)
static void ping(char *host)
{
struct protoent *proto;
struct protoent *proto=NULL;
struct hostent *h;
char buf[MAXHOSTNAMELEN];
char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
int sockopt;
if (!(proto = getprotobyname("icmp"))) {
/* getprotobyname failed, so just silently force
* proto->p_proto to have the correct value for "icmp" */
proto->p_proto = 1;
}
if ((pingsock = socket(AF_INET, SOCK_RAW, proto->p_proto)) < 0) { /* 1 == ICMP */
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 {