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Fix the 'fwd' option to ipfw when asked to divert to another machine.

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also rely less on other modules clearing static values, and clear them
in a few cases we missed before.
Submitted by: Matthew Reimer <mreimer@vpop.net>
This commit is contained in:
Julian Elischer 1999-03-12 01:15:57 +00:00
parent 51df594922
commit ed1ff184f3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44677
1 changed files with 24 additions and 7 deletions
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31
sys/netinet/ip_input.c
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94
* $Id: ip_input.c,v 1.114 1999/02/09 16:55:46 wollman Exp $
* $Id: ip_input.c,v 1.115 1999/02/22 18:19:57 des Exp $
*/
#define _IP_VHL
@ -437,8 +437,12 @@ iphack:
}
pass:
if (ip_nat_ptr && !(*ip_nat_ptr)(&ip, &m, m->m_pkthdr.rcvif, IP_NAT_IN))
if (ip_nat_ptr && !(*ip_nat_ptr)(&ip, &m, m->m_pkthdr.rcvif, IP_NAT_IN)) {
#ifdef IPFIREWALL_FORWARD
ip_fw_fwd_addr = NULL;
#endif
return;
}
#endif /* !COMPAT_IPFW */
/*
@ -448,8 +452,12 @@ pass:
* to be sent and the original packet to be freed).
*/
ip_nhops = 0; /* for source routed packets */
if (hlen > sizeof (struct ip) && ip_dooptions(m))
if (hlen > sizeof (struct ip) && ip_dooptions(m)) {
#ifdef IPFIREWALL_FORWARD
ip_fw_fwd_addr = NULL;
#endif
return;
}
/* greedy RSVP, snatches any PATH packet of the RSVP protocol and no
* matter if it is destined to another node, or whether it is
@ -474,8 +482,6 @@ pass:
ia = TAILQ_NEXT(ia, ia_link)) {
#define satosin(sa) ((struct sockaddr_in *)(sa))
if (IA_SIN(ia)->sin_addr.s_addr == ip->ip_dst.s_addr)
goto ours;
#ifdef BOOTP_COMPAT
if (IA_SIN(ia)->sin_addr.s_addr == INADDR_ANY)
goto ours;
@ -485,10 +491,15 @@ pass:
* If the addr to forward to is one of ours, we pretend to
* be the destination for this packet.
*/
if (ip_fw_fwd_addr != NULL &&
IA_SIN(ia)->sin_addr.s_addr ==
if (ip_fw_fwd_addr == NULL) {
if (IA_SIN(ia)->sin_addr.s_addr == ip->ip_dst.s_addr)
goto ours;
} else if (IA_SIN(ia)->sin_addr.s_addr ==
ip_fw_fwd_addr->sin_addr.s_addr)
goto ours;
#else
if (IA_SIN(ia)->sin_addr.s_addr == ip->ip_dst.s_addr)
goto ours;
#endif
if (ia->ia_ifp && ia->ia_ifp->if_flags & IFF_BROADCAST) {
if (satosin(&ia->ia_broadaddr)->sin_addr.s_addr ==
@ -555,6 +566,9 @@ pass:
m_freem(m);
} else
ip_forward(m, 0);
#ifdef IPFIREWALL_FORWARD
ip_fw_fwd_addr = NULL;
#endif
return;
ours:
@ -573,6 +587,9 @@ ours:
#ifdef IPDIVERT
frag_divert_port = 0;
ip_divert_cookie = 0;
#endif
#ifdef IPFIREWALL_FORWARD
ip_fw_fwd_addr = NULL;
#endif
return;
}