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Check if generated Mac Address matchs the NIC of all Interfaces except lo #6

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Check if generated Mac Address matchs the NIC of all Interfaces except lo #6

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118f7a0
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Buhnug Mar 1, 2025
1ddfa43
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Buhnug Mar 1, 2025
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58 changes: 44 additions & 14 deletions wipri
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Original file line number Diff line number Diff line change
Expand Up @@ -215,28 +215,58 @@ function hostn {
dhclient $netdev || echo -e "${RED}dhclient not found - OK we can still make due without it${ENDCOLOR}"
}

#######################################################
# Function to check if a MAC address's last three octets match any existing interface NICs except for the loopback interface.
# This is for essentially blacklisting any real NIC's in random mac generation.
check_mac_conflict() {
local new_mac=$1
local new_last_three_octets=$(echo "$new_mac" | awk -F: '{print $(NF-2)":"$(NF-1)":"$NF}')

for iface in /sys/class/net/*; do
if [ -f "$iface/address" ] && [ "$(basename "$iface")" != "lo" ]; then
existing_mac=$(cat "$iface/address")
existing_last_three_octets=$(echo "$existing_mac" | awk -F: '{print $(NF-2)":"$(NF-1)":"$NF}')
if [ "$new_last_three_octets" == "$existing_last_three_octets" ]; then
return 0 # Conflict found
fi
fi
done

return 1 # No conflict
}

#######################################################
# MAC randomization/setting
function macrand {
hexchar="abcdef0123456789"
beg=$(shuf -n 1 $oui_file) # $oui_file contains important info to generate valid random macs: ma>
end=$( for i in {1..6} ; do echo -n ${hexchar:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' )
mac=$beg$end
/bin/echo -e "${BLUE}Changing MAC to:${ENDCOLOR} $RED$mac$ENDCOLOR"
ip link set dev $netdev down;ip link set dev $netdev address $mac;ip link set dev $netdev up;
echo ""
hexchar="abcdef0123456789"
while true; do
beg=$(shuf -n 1 $oui_file) # $oui_file contains important info to generate valid random macs
end=$( for i in {1..6} ; do echo -n ${hexchar:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' )
mac=$beg$end
if ! check_mac_conflict "$mac"; then
break
fi
done
/bin/echo -e "${BLUE}Changing MAC to:${ENDCOLOR} $RED$mac$ENDCOLOR"
ip link set dev $netdev down;ip link set dev $netdev address $mac;ip link set dev $netdev up;
echo ""
}

#######################################################
# MAC randomization (phone version- temp version)
function phmacrand {
hexchar="abcdef0123456789"
beg=$(shuf -n 1 $phoui_file) # $phoui_file contains important info to generate valid random phone macs
end=$( for i in {1..6} ; do echo -n ${hexchar:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' )
mac=$beg$end
/bin/echo -e "${BLUE}Changing MAC to:${ENDCOLOR} ${RED}$mac${ENDCOLOR}"
ip link set dev $netdev down;ip link set dev $netdev address $mac;ip link set dev $netdev up;
echo ""
hexchar="abcdef0123456789"
while true; do
beg=$(shuf -n 1 $phoui_file) # $phoui_file contains important info to generate valid random phone macs
end=$( for i in {1..6} ; do echo -n ${hexchar:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' )
mac=$beg$end
if ! check_mac_conflict "$mac"; then
break
fi
done
/bin/echo -e "${BLUE}Changing MAC to:${ENDCOLOR} ${RED}$mac${ENDCOLOR}"
ip link set dev $netdev down;ip link set dev $netdev address $mac;ip link set dev $netdev up;
echo ""
}

########################################################
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