create_ap

create a nat-ed wifi ap
git clone git://git.2f30.org/create_ap.git
Log | Files | Refs | LICENSE

commit 814ddf91006aaf983b9afe2c89b88c19415d8093
parent 70b538be7cacfbbdfb5ffa896d99d6416c7420be
Author: oblique <psyberbits@gmail.com>
Date:   Sun Nov 23 19:06:57 +0200

Add --mac option

Diffstat:
create_ap | 51++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 48 insertions(+), 3 deletions(-)
diff --git a/create_ap b/create_ap @@ -44,6 +44,7 @@ usage() { echo " --fix-unmanaged If NetworkManager shows your interface as unmanaged after you" echo " close create_ap, then use this option to switch your interface" echo " back to managed" + echo " --mac <MAC> Set MAC address" echo echo "Non-Bridging Options:" echo " -g <gateway> IPv4 Gateway for the Access Point (default: 192.168.12.1)" @@ -202,6 +203,17 @@ is_wifi_connected() { return 1 } +is_macaddr() { + echo "$1" | grep -E "^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$" > /dev/null 2>&1 +} + +is_unicast_macaddr() { + is_macaddr "$1" || return 1 + x=$(echo "$1" | cut -d: -f1) + x=$(printf '%d' "0x${x}") + [[ $(expr $x % 2) -eq 0 ]] +} + get_macaddr() { is_interface "$1" || return cat "/sys/class/net/${1}/address" @@ -394,6 +406,7 @@ NO_VIRT=0 FIX_UNMANAGED=0 COUNTRY= FREQ_BAND=2.4 +NEW_MACADDR= CONFDIR= WIFI_IFACE= @@ -479,7 +492,10 @@ cleanup() { else ip link set down dev ${WIFI_IFACE} ip addr flush ${WIFI_IFACE} - networkmanager_rm_unmanaged_if_needed ${WIFI_IFACE} + if [[ -n "$NEW_MACADDR" ]]; then + ip link set dev ${WIFI_IFACE} address ${OLD_MACADDR} + fi + networkmanager_rm_unmanaged_if_needed ${WIFI_IFACE} ${OLD_MACADDR} fi } @@ -497,7 +513,7 @@ clean_exit() { # if the user press ctrl+c then execute die() trap "die" SIGINT -ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden","ieee80211n","ht_capab:","driver:","no-virt","fix-unmanaged","country:","freq-band:" -n $(basename $0) -- "$@") +ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden","ieee80211n","ht_capab:","driver:","no-virt","fix-unmanaged","country:","freq-band:","mac:" -n $(basename $0) -- "$@") [[ $? -ne 0 ]] && exit 1 eval set -- "$ARGS" @@ -571,6 +587,11 @@ while :; do FREQ_BAND="$1" shift ;; + --mac) + shift + NEW_MACADDR="$1" + shift + ;; --) shift break @@ -640,6 +661,22 @@ if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "bridge" && "$SHARE_METHOD" exit 1 fi +if [[ -n "$NEW_MACADDR" ]]; then + if ! is_macaddr "$NEW_MACADDR"; then + echo "ERROR: '${NEW_MACADDR}' is not a valid MAC address" >&2 + exit 1 + fi + + if ! is_unicast_macaddr "$NEW_MACADDR"; then + echo "ERROR: The first byte of MAC address (${NEW_MACADDR}) must be even" >&2 + exit 1 + fi + + if [[ $(get_all_macaddrs | grep -c ${NEW_MACADDR}) -ne 0 ]]; then + echo "WARN: MAC address '${NEW_MACADDR}' already exists. Because of this, you may encounter some problems" >&2 + fi +fi + if [[ "$SHARE_METHOD" != "none" ]]; then MIN_REQUIRED_ARGS=2 else @@ -780,10 +817,12 @@ if [[ $NO_VIRT -eq 0 ]]; then die "$VIRTDIEMSG" fi OLD_MACADDR=$(get_macaddr ${VWIFI_IFACE}) - if [[ $(get_all_macaddrs | grep -c ${OLD_MACADDR}) -ne 1 ]]; then + if [[ -z "$NEW_MACADDR" && $(get_all_macaddrs | grep -c ${OLD_MACADDR}) -ne 1 ]]; then NEW_MACADDR=$(get_new_macaddr ${VWIFI_IFACE}) fi WIFI_IFACE=${VWIFI_IFACE} +else + OLD_MACADDR=$(get_macaddr ${WIFI_IFACE}) fi can_transmit_to_channel ${WIFI_IFACE} ${CHANNEL} || die "Your adapter can not transmit to channel ${CHANNEL}, frequency band ${FREQ_BAND}GHz." @@ -863,8 +902,14 @@ fi if [[ $NO_VIRT -eq 0 && -n "$NEW_MACADDR" ]]; then ip link set dev ${WIFI_IFACE} address ${NEW_MACADDR} || die "$VIRTDIEMSG" fi + ip link set down dev ${WIFI_IFACE} || die "$VIRTDIEMSG" ip addr flush ${WIFI_IFACE} || die "$VIRTDIEMSG" + +if [[ $NO_VIRT -eq 1 && -n "$NEW_MACADDR" ]]; then + ip link set dev ${WIFI_IFACE} address ${NEW_MACADDR} || die +fi + if [[ "$SHARE_METHOD" != "bridge" ]]; then ip link set up dev ${WIFI_IFACE} || die "$VIRTDIEMSG" ip addr add ${GATEWAY}/24 broadcast ${GATEWAY%.*}.255 dev ${WIFI_IFACE} || die "$VIRTDIEMSG"