pppoe: T1318: add ip-pre-up script

ppp already supports ip-pre-up script but none was being supplied. Need
ip-pre-up to handle renames and firewall properly.

Script imported from old VyOS PPP fork repository at
https://github.com/vyos/ppp-debian

1 files changed, 51 insertions, 0 deletions

diff --git a/src/etc/ppp/ip-pre-up b/src/etc/ppp/ip-pre-up
new file mode 100755
index 000000000..05840650b
--- /dev/null
+++ b/src/etc/ppp/ip-pre-up
@@ -0,0 +1,51 @@
+#!/bin/sh
+#
+# This script is run by the pppd when the link is created.
+# It uses run-parts to run scripts in /etc/ppp/ip-pre-up.d, to
+# change name, setup firewall,etc  you should create script(s) there.
+#
+# Be aware that other packages may include /etc/ppp/ip-pre-up.d scripts (named
+# after that package), so choose local script names with that in mind.
+#
+# This script is called with the following arguments:
+#    Arg  Name                          Example
+#    $1   Interface name                ppp0
+#    $2   The tty                       ttyS1
+#    $3   The link speed                38400
+#    $4   Local IP number               12.34.56.78
+#    $5   Peer  IP number               12.34.56.99
+#    $6   Optional ``ipparam'' value    foo
+
+# The  environment is cleared before executing this script
+# so the path must be reset
+PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin
+export PATH
+
+# These variables are for the use of the scripts run by run-parts
+PPP_IFACE="$1"
+PPP_TTY="$2"
+PPP_SPEED="$3"
+PPP_LOCAL="$4"
+PPP_REMOTE="$5"
+PPP_IPPARAM="$6"
+export PPP_IFACE PPP_TTY PPP_SPEED PPP_LOCAL PPP_REMOTE PPP_IPPARAM
+
+# as an additional convenience, $PPP_TTYNAME is set to the tty name,
+# stripped of /dev/ (if present) for easier matching.
+PPP_TTYNAME=`/usr/bin/basename "$2"`
+export PPP_TTYNAME
+
+# If /var/log/ppp-ipupdown.log exists use it for logging.
+if [ -e /var/log/ppp-ipupdown.log ]; then
+  exec > /var/log/ppp-ipupdown.log 2>&1
+  echo $0 $*
+  echo
+fi
+
+# This script can be used to override the .d files supplied by other packages.
+if [ -x /etc/ppp/ip-pre-up.local ]; then
+  exec /etc/ppp/ip-pre-up.local "$*"
+fi
+
+run-parts /etc/ppp/ip-pre-up.d \
+ --arg="$1" --arg="$2" --arg="$3" --arg="$4" --arg="$5" --arg="$6"