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-rwxr-xr-xpackage/base-files/default/etc/functions.sh57
1 files changed, 57 insertions, 0 deletions
diff --git a/package/base-files/default/etc/functions.sh b/package/base-files/default/etc/functions.sh
new file mode 100755
index 0000000000..60d6231f8a
--- /dev/null
+++ b/package/base-files/default/etc/functions.sh
@@ -0,0 +1,57 @@
+#!/bin/ash
+
+alias debug=${DEBUG:-:}
+
+# allow env to override nvram
+nvram () {
+ case $1 in
+ get) eval "echo \${NVRAM_$2:-\$(command nvram get $2)}";;
+ *) command nvram $*;;
+ esac
+}
+. /etc/nvram.overrides
+
+# valid interface?
+if_valid () (
+ ifconfig "$1" >&- 2>&- ||
+ [ "${1%%[0-9]}" = "br" ] ||
+ {
+ [ "${1%%[0-9]}" = "vlan" ] && (
+ i=${1#vlan}
+ hwname=$(nvram get vlan${i}hwname)
+ hwaddr=$(nvram get ${hwname}macaddr)
+ [ -z "$hwaddr" ] && return 1
+
+ vif=$(ifconfig -a | awk '/^eth.*'$hwaddr'/ {print $1; exit}' IGNORECASE=1)
+ debug "# vlan$i => $vif"
+
+ $DEBUG ifconfig $vif up
+ $DEBUG vconfig add $vif $i 2>&-
+ )
+ } ||
+ { debug "# missing interface '$1' ignored"; false; }
+)
+
+bitcount () {
+ local c=$1
+ echo $((
+ c=((c>> 1)&0x55555555)+(c&0x55555555),
+ c=((c>> 2)&0x33333333)+(c&0x33333333),
+ c=((c>> 4)&0x0f0f0f0f)+(c&0x0f0f0f0f),
+ c=((c>> 8)&0x00ff00ff)+(c&0x00ff00ff),
+ c=((c>>16)&0x0000ffff)+(c&0x0000ffff)
+ ))
+}
+
+valid_netmask () {
+ return $((-($1)&~$1))
+}
+
+ip2int () (
+ set $(echo $1 | tr '\.' ' ')
+ echo $(($1<<24|$2<<16|$3<<8|$4))
+)
+
+int2ip () {
+ echo $(($1>>24&255)).$(($1>>16&255)).$(($1>>8&255)).$(($1&255))
+}