From e20a9baff26986d2bbb8201615dd39c9748b7141 Mon Sep 17 00:00:00 2001
From: "David Kaspar [Dee'Kej]" <dkaspar@redhat.com>
Date: Thu, 10 Nov 2016 12:14:30 +0100
Subject: network-functions: do not send hostname via dhclient everytime

---
 sysconfig/network-scripts/ifup-eth          | 17 +++++++++++++++--
 sysconfig/network-scripts/network-functions | 17 ++++++++++-------
 2 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/sysconfig/network-scripts/ifup-eth b/sysconfig/network-scripts/ifup-eth
index 4d022f76..e884fa73 100755
--- a/sysconfig/network-scripts/ifup-eth
+++ b/sysconfig/network-scripts/ifup-eth
@@ -185,7 +185,13 @@ if [ -n "${DYNCONFIG}" ] && [ -x /sbin/dhclient ]; then
     fi;
     generate_config_file_name
     generate_lease_file_name
-    DHCLIENTARGS="${DHCLIENTARGS} -H ${DHCP_HOSTNAME:-${HOSTNAME%%.*}} ${ONESHOT} -q ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient-${DEVICE}.pid"
+
+    if need_hostname; then
+        DHCLIENTARGS="${DHCLIENTARGS} ${DHCP_HOSTNAME:+-H $DHCP_HOSTNAME} ${ONESHOT} -q ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient-${DEVICE}.pid"
+    else
+        DHCLIENTARGS="${DHCLIENTARGS} -H ${DHCP_HOSTNAME:-${HOSTNAME%%.*}} ${ONESHOT} -q ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient-${DEVICE}.pid"
+    fi
+
     echo
     echo -n $"Determining IP information for ${DEVICE}..."
     if ! is_true "${PERSISTENT_DHCLIENT}" && check_link_down ${DEVICE}; then
@@ -326,7 +332,14 @@ if is_true "${DHCPV6C}" && [ -x /sbin/dhclient ]; then
     generate_lease_file_name 6
     echo
     echo -n $"Determining IPv6 information for ${DEVICE}..."
-    if /sbin/dhclient -6 -1 ${DHCPV6C_OPTIONS} ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient6-${DEVICE}.pid -H ${DHCP_HOSTNAME:-${HOSTNAME%%.*}} ${DEVICE} ; then
+
+    if need_hostname; then
+        DHCLIENTARGS="-6 -1 ${DHCPV6C_OPTIONS} ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient6-${DEVICE}.pid ${DHCP_HOSTNAME:+-H $DHCP_HOSTNAME} ${DEVICE}"
+    else
+        DHCLIENTARGS="-6 -1 ${DHCPV6C_OPTIONS} ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient6-${DEVICE}.pid -H ${DHCP_HOSTNAME:-${HOSTNAME%%.*}} ${DEVICE}"
+    fi
+
+    if /sbin/dhclient "$DHCLIENTARGS"; then
         echo $" done."
     else
         echo $" failed."
diff --git a/sysconfig/network-scripts/network-functions b/sysconfig/network-scripts/network-functions
index 7f753e29..4ff6b988 100644
--- a/sysconfig/network-scripts/network-functions
+++ b/sysconfig/network-scripts/network-functions
@@ -355,13 +355,16 @@ is_available_wait ()
 
 need_hostname ()
 {
-    CHECK_HOSTNAME=$(hostname)
-    if [ "$CHECK_HOSTNAME" = "(none)" -o "$CHECK_HOSTNAME" = "localhost" -o \
-             "$CHECK_HOSTNAME" = "localhost.localdomain" ]; then
-        return 0
-    else
-        return 1
-    fi
+    CHECK_HOSTNAME="$(hostname)"
+
+    case "$CHECK_HOSTNAME" in
+        '(none)' | 'localhost' | 'localhost.localdomain')
+            return 0
+            ;;
+        *)
+            return 1
+            ;;
+    esac
 }
 
 set_hostname ()
-- 
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