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Remove the IPFIREWALL_FORWARD_EXTENDED option and make it on by default as it always was

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in older versions of FreeBSD. This option is pointless as it is needed in just
about every interesting usage of forward that I have ever seen. It doesn't make
the system any safer and just wastes huge amounts of develper time
when the system doesn't behave as expected when code is moved from
4.x to 6.x It doesn't make
the system any safer and just wastes huge amounts of develper time
when the system doesn't behave as expected when code is moved from
4.x to 6.x  or 7.x
Reviewed by:	glebius
MFC after:	1 week
This commit is contained in:
Julian Elischer 2006-08-17 00:37:03 +00:00
parent aade86560a
commit b7522c27d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=161380
5 changed files with 9 additions and 31 deletions
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10
sys/conf/NOTES
View File

@ -720,12 +720,9 @@ device stf #6to4 IPv6 over IPv4 encapsulation
#
# IPFIREWALL_FORWARD enables changing of the packet destination either
# to do some sort of policy routing or transparent proxying. Used by
# ``ipfw forward''.
#
# IPFIREWALL_FORWARD_EXTENDED enables full packet destination changing
# including redirecting packets to local IP addresses and ports. All
# redirections apply to locally generated packets too. Because of this
# great care is required when crafting the ruleset.
# ``ipfw forward''. All redirections apply to locally generated
# packets too. Because of this great care is required when
# crafting the ruleset.
#
# IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
# packets without touching the ttl). This can be useful to hide firewalls
@ -742,7 +739,6 @@ options IPFIREWALL_VERBOSE #enable logging to syslogd(8)
options IPFIREWALL_VERBOSE_LIMIT=100 #limit verbosity
options IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options IPFIREWALL_FORWARD #packet destination changes
options IPFIREWALL_FORWARD_EXTENDED #all packet dest changes
options IPDIVERT #divert sockets
options IPFILTER #ipfilter support
options IPFILTER_LOG #ipfilter logging

1
sys/conf/options
View File

@ -369,7 +369,6 @@ IPFIREWALL_VERBOSE opt_ipfw.h
IPFIREWALL_VERBOSE_LIMIT opt_ipfw.h
IPFIREWALL_DEFAULT_TO_ACCEPT opt_ipfw.h
IPFIREWALL_FORWARD opt_ipfw.h
IPFIREWALL_FORWARD_EXTENDED opt_ipfw.h
IPSTEALTH
IPX
IPXIP opt_ipx.h

6
sys/netinet/ip_fastfwd.c
View File

@ -476,11 +476,7 @@ ip_fastforward(struct mbuf *m)
*/
#ifdef IPFIREWALL_FORWARD
if (fwd_tag) {
#ifndef IPFIREWALL_FORWARD_EXTENDED
if (!in_localip(ip->ip_src) &&
!in_localaddr(ip->ip_dst))
#endif
dest.s_addr = ((struct sockaddr_in *)
dest.s_addr = ((struct sockaddr_in *)
(fwd_tag + 1))->sin_addr.s_addr;
m_tag_delete(m, fwd_tag);
}

4
sys/netinet/ip_input.c
View File

@ -423,9 +423,6 @@ ip_input(struct mbuf *m)
m->m_flags &= ~M_FASTFWD_OURS;
goto ours;
}
#ifndef IPFIREWALL_FORWARD_EXTENDED
dchg = (m_tag_find(m, PACKET_TAG_IPFORWARD, NULL) != NULL);
#else
if ((dchg = (m_tag_find(m, PACKET_TAG_IPFORWARD, NULL) != NULL)) != 0) {
/*
* Directly ship on the packet. This allows to forward packets
@ -435,7 +432,6 @@ ip_input(struct mbuf *m)
ip_forward(m, dchg);
return;
}
#endif /* IPFIREWALL_FORWARD_EXTENDED */
#endif /* IPFIREWALL_FORWARD */
passin:

19
sys/netinet/ip_output.c
View File

@ -457,20 +457,11 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro,
/* Or forward to some other address? */
fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL);
if (fwd_tag) {
#ifndef IPFIREWALL_FORWARD_EXTENDED
if (!in_localip(ip->ip_src) && !in_localaddr(ip->ip_dst)) {
#endif
dst = (struct sockaddr_in *)&ro->ro_dst;
bcopy((fwd_tag+1), dst, sizeof(struct sockaddr_in));
m->m_flags |= M_SKIP_FIREWALL;
m_tag_delete(m, fwd_tag);
goto again;
#ifndef IPFIREWALL_FORWARD_EXTENDED
} else {
m_tag_delete(m, fwd_tag);
/* Continue. */
}
#endif
dst = (struct sockaddr_in *)&ro->ro_dst;
bcopy((fwd_tag+1), dst, sizeof(struct sockaddr_in));
m->m_flags |= M_SKIP_FIREWALL;
m_tag_delete(m, fwd_tag);
goto again;
}
#endif /* IPFIREWALL_FORWARD */