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Another small set of changes to reduce diffs with the new arp code.

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This commit is contained in:
Luigi Rizzo 2004-04-25 15:00:17 +00:00
parent 42dfa03d2a
commit b2a8ac7ca5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=128645
1 changed files with 18 additions and 31 deletions
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49
sys/netinet/if_ether.c
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@ -570,23 +570,17 @@ in_arpinput(m)
/*
* If bridging, fall back to using any inet address.
*/
if (!BRIDGE_TEST ||
(ia = TAILQ_FIRST(&in_ifaddrhead)) == NULL) {
m_freem(m);
return;
}
if (!BRIDGE_TEST || (ia = TAILQ_FIRST(&in_ifaddrhead)) == NULL)
goto drop;
match:
myaddr = ia->ia_addr.sin_addr;
if (!bcmp(ar_sha(ah), IF_LLADDR(ifp), ifp->if_addrlen)) {
m_freem(m); /* it's from me, ignore it. */
return;
}
if (!bcmp(ar_sha(ah), IF_LLADDR(ifp), ifp->if_addrlen))
goto drop; /* it's from me, ignore it. */
if (!bcmp(ar_sha(ah), ifp->if_broadcastaddr, ifp->if_addrlen)) {
log(LOG_ERR,
"arp: link address is broadcast for IP address %s!\n",
inet_ntoa(isaddr));
m_freem(m);
return;
goto drop;
}
if (isaddr.s_addr == myaddr.s_addr) {
log(LOG_ERR,
@ -692,10 +686,8 @@ in_arpinput(m)
}
}
reply:
if (op != ARPOP_REQUEST) {
m_freem(m);
return;
}
if (op != ARPOP_REQUEST)
goto drop;
if (itaddr.s_addr == myaddr.s_addr) {
/* I am the target */
(void)memcpy(ar_tha(ah), ar_sha(ah), ah->ar_hln);
@ -705,10 +697,8 @@ in_arpinput(m)
if (la == NULL) {
struct sockaddr_in sin;
if (!arp_proxyall) {
m_freem(m);
return;
}
if (!arp_proxyall)
goto drop;
bzero(&sin, sizeof sin);
sin.sin_family = AF_INET;
@ -716,10 +706,8 @@ in_arpinput(m)
sin.sin_addr = itaddr;
rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
if (!rt) {
m_freem(m);
return;
}
if (!rt)
goto drop;
/*
* Don't send proxies for nodes on the same interface
* as this one came out of, or we'll get into a fight
@ -727,8 +715,7 @@ in_arpinput(m)
*/
if (rt->rt_ifp == ifp) {
rtfree(rt);
m_freem(m);
return;
goto drop;
}
(void)memcpy(ar_tha(ah), ar_sha(ah), ah->ar_hln);
(void)memcpy(ar_sha(ah), IF_LLADDR(ifp), ah->ar_hln);
@ -743,18 +730,15 @@ in_arpinput(m)
sin.sin_addr = isaddr;
rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
if (!rt) {
m_freem(m);
return;
}
if (!rt)
goto drop;
if (rt->rt_ifp != ifp) {
log(LOG_INFO, "arp_proxy: ignoring request"
" from %s via %s, expecting %s\n",
inet_ntoa(isaddr), ifp->if_xname,
rt->rt_ifp->if_xname);
rtfree(rt);
m_freem(m);
return;
goto drop;
}
rtfree(rt);
@ -781,6 +765,9 @@ in_arpinput(m)
sa.sa_len = 2;
(*ifp->if_output)(ifp, m, &sa, (struct rtentry *)0);
return;
drop:
m_freem(m);
}
#endif