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print reason for arplookup() failure (ala FreeBSD)

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This commit is contained in:
drochner 1998-10-01 11:04:24 +00:00
parent ce58a65013
commit 5ddf423985
1 changed files with 17 additions and 9 deletions
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26
sys/netinet/if_arp.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_arp.c,v 1.52 1998/09/30 21:52:24 tls Exp $ */
/* $NetBSD: if_arp.c,v 1.53 1998/10/01 11:04:24 drochner Exp $ */
/*
* Copyright (c) 1982, 1986, 1988, 1993
@ -677,6 +677,7 @@ arplookup(addr, create, proxy)
{
register struct rtentry *rt;
static struct sockaddr_inarp sin;
const char *why = 0;
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
@ -686,14 +687,21 @@ arplookup(addr, create, proxy)
if (rt == 0)
return (0);
rt->rt_refcnt--;
if ((rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 ||
rt->rt_gateway->sa_family != AF_LINK) {
if (create)
log(LOG_DEBUG, "arplookup: unable to enter address for %s\n",
in_fmtaddr(*addr));
return (0);
}
return ((struct llinfo_arp *)rt->rt_llinfo);
if (rt->rt_flags & RTF_GATEWAY)
why = "host is not on local network";
else if ((rt->rt_flags & RTF_LLINFO) == 0)
why = "could not allocate llinfo";
else if (rt->rt_gateway->sa_family != AF_LINK)
why = "gateway route is not ours";
else
return ((struct llinfo_arp *)rt->rt_llinfo);
if (create)
log(LOG_DEBUG, "arplookup: unable to enter address"
" for %s (%s)\n",
in_fmtaddr(*addr), why);
return (0);
}
int