From 38edd98bc9701f317c43fddafcbf2e808c969293 Mon Sep 17 00:00:00 2001
From: Darren Austin <darren@slackware.uk>
Date: Sun, 18 Mar 2018 03:57:18 -0500
Subject: rc.inet1*: Allow setting an interface in promiscuous mode

This is needed for container networking - the bridge for it
must be in promiscuous mode.

Signed-off-by: Robby Workman <rworkman@slackware.com>
---
 rc.inet1      | 24 +++++++++++++++++-------
 rc.inet1.conf |  1 +
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/rc.inet1 b/rc.inet1
index 29bd97d..1f3cb60 100644
--- a/rc.inet1
+++ b/rc.inet1
@@ -204,13 +204,19 @@ if_up() {
         # 15 seconds should be a reasonable default DHCP timeout.  30 was too much.
         echo "/etc/rc.d/rc.inet1:  /sbin/dhcpcd -L -t ${DHCP_TIMEOUT[$i]:-15} ${DHCP_OPTIONS} ${1}" | $LOGGER
         /sbin/dhcpcd -L -t ${DHCP_TIMEOUT[$i]:-15} ${DHCP_OPTIONS} ${1}
-        # If the dhcpcd call succeeds, add extra IP addresses, if defined, to interface
-        if [ "$?" == "0" ] && [ -n "${IPALIASES[$i]}" ]; then
-          num=0
-          for ipalias in ${IPALIASES[$i]}; do
-            /sbin/ip address add ${ipalias}/32 dev ${1} label ${1}:${num} ;
-            num=$(($num + 1))
-          done
+        if [ "$?" == "0" ]; then # the dhcp call has succeeded
+          if [ -n "${IPALIASES[$i]}" ]; then
+            # Add extra IP addresses, if defined, to interface
+            num=0
+            for ipalias in ${IPALIASES[$i]}; do
+              /sbin/ip address add ${ipalias}/32 dev ${1} label ${1}:${num} ;
+              num=$(($num + 1))
+            done
+          fi
+          if [ "${PROMISCUOUS[$i]}" = "yes" ]; then
+            # Set promiscuous mode on the interface
+            /sbin/ip link set dev ${1} promisc on
+          fi
         fi
       else # bring up interface using a static IP address
         if [ -n "${IPADDR[$i]}" ]; then # skip unconfigured interfaces
@@ -228,6 +234,10 @@ if_up() {
               num=$(($num + 1))
             done
           fi
+          if [ "${PROMISCUOUS[$i]}" = "yes" ]; then
+            # Set promiscuous mode on the interface
+            /sbin/ip link set dev ${1} promisc on
+          fi
         else
           debug_log "${1} interface is not configured in /etc/rc.d/rc.inet1.conf"
         fi
diff --git a/rc.inet1.conf b/rc.inet1.conf
index 58766d2..cde99a9 100644
--- a/rc.inet1.conf
+++ b/rc.inet1.conf
@@ -108,6 +108,7 @@ DEBUG_ETH_UP="no"
 #HWADDR[4]="00:01:23:45:67:89"  # Overrule the card's hardware MAC address
 #MTU[4]=""                      # The default MTU is 1500, but you might need
                                 # 1360 when you use NAT'ed IPSec traffic.
+#PROMISCUOUS[4]="yes"           # Set promiscuous mode on the interface.
 #DHCP_TIMEOUT[4]=15             # The default timeout for the DHCP client to
                                 # wait for server resonse is 15 seconds, but
                                 # you might want a shorter or longer wait.
-- 
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