initsoftap

#!/bin/sh

INTERFACE='wlp3s0'
INTERNET='ppp0'

#Initial wifi interface configuration
ifconfig $INTERFACE up 10.0.0.1 netmask 255.255.255.0
sleep 2

###########Start DHCP, comment out / add relevant section##########
#Thanks to Panji
#Doesn't try to run dhcpd when already running
if [ "$(ps -e | grep dhcpd)" == "" ]; then
    dhcpd $INTERFACE &> /dev/null &
fi

###########
#Enable NAT
iptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain
iptables --table nat --append POSTROUTING --out-interface $INTERNET -j MASQUERADE
iptables --append FORWARD --in-interface $INTERFACE -j ACCEPT

#Thanks to lorenzo
#Uncomment the line below if facing problems while sharing PPPoE, see lorenzo's comment for more details
#iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

sysctl -w net.ipv4.ip_forward=1 &

#start hostapd
#hostapd /etc/hostapd/hostapd.conf &> /dev/null &
hostapd /etc/hostapd/hostapd.conf
killall dhcpd