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RFC 3442 - improved dhclient-script

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This commit is contained in:
Jiri Popelka 2010-10-04 11:51:33 +02:00
parent d5a4ff8b46
commit 2560aa7e3c
2 changed files with 25 additions and 18 deletions
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37
dhclient-script
View File

@ -307,10 +307,6 @@ dhconfig() {
[ -n "${new_static_routes}" ]; then
if [ -n "${new_classless_static_routes}" ]; then
IFS=', |' static_routes=(${new_classless_static_routes})
# If the DHCP server returns both a Classless Static Routes option and
# a Router option, the DHCP client MUST ignore the Router option. (RFC3442)
new_routers=""
else
IFS=', |' static_routes=(${new_static_routes})
fi
@ -319,19 +315,26 @@ dhconfig() {
for((i=0; i<${#static_routes[@]}; i+=2)); do
target=${static_routes[$i]}
if [ -n "${new_classless_static_routes}" ]; then
prefix=$(echo ${target} | cut -d "." -f 1)
target=$(echo ${target} | cut -d "." -f 2-)
IFS="." target_arr=(${target})
unset IFS
((pads=4-${#target_arr[@]}))
for j in $(seq $pads); do
target=${target}".0"
done
if [ ${target} = "0" ]; then
# If the DHCP server returns both a Classless Static Routes option and
# a Router option, the DHCP client MUST ignore the Router option. (RFC3442)
new_routers=""
prefix="0"
else
prefix=$(echo ${target} | cut -d "." -f 1)
target=$(echo ${target} | cut -d "." -f 2-)
IFS="." target_arr=(${target})
unset IFS
((pads=4-${#target_arr[@]}))
for j in $(seq $pads); do
target=${target}".0"
done
# Client MUST zero any bits in the subnet number where the corresponding bit in the mask is zero.
# In other words, the subnet number installed in the routing table is the logical AND of
# the subnet number and subnet mask given in the Classless Static Routes option. (RFC3442)
target="$(get_network_address ${target} ${prefix})"
# Client MUST zero any bits in the subnet number where the corresponding bit in the mask is zero.
# In other words, the subnet number installed in the routing table is the logical AND of
# the subnet number and subnet mask given in the Classless Static Routes option. (RFC3442)
target="$(get_network_address ${target} ${prefix})"
fi
else
prefix=$(class_bits ${target})
fi
@ -353,7 +356,7 @@ dhconfig() {
fi
if is_router_reachable ${gateway}; then
ip -4 route replace ${target}/${prefix} via ${gateway} dev ${interface} ${metric}
ip -4 route replace ${target}/${prefix} proto static via ${gateway} dev ${interface} ${metric}
if [ $? -ne 0 ]; then
logmessage "failed to create static route: ${target}/${prefix} via ${gateway} dev ${interface} ${metric}"

6
dhcp.spec
View File

@ -7,7 +7,7 @@
Summary: Dynamic host configuration protocol software
Name: dhcp
Version: 4.2.0
Release: 8%{?dist}
Release: 9%{?dist}
# NEVER CHANGE THE EPOCH on this package. The previous maintainer (prior to
# dcantrell maintaining the package) made incorrect use of the epoch and
# that's why it is at 12 now. It should have never been used, but it was.
@ -515,6 +515,10 @@ fi
%attr(0644,root,root) %{_mandir}/man3/omapi.3.gz
%changelog
* Mon Oct 04 2010 Jiri Popelka <jpopelka@redhat.com> - 12:4.2.0-9
- RFC 3442 - ignore Router option only if
Classless Static Routes option contains default router
* Thu Sep 30 2010 Jiri Popelka <jpopelka@redhat.com> - 12:4.2.0-8
- Explicitly clear the ARP cache and flush all addresses & routes
instead of bringing the interface down (#574568)