From 207c8f22e0eb3c3e2621ebe0d11d8da522d4ef1d Mon Sep 17 00:00:00 2001
From: ache <ache@ache.one>
Date: Mon, 15 Jan 2018 04:00:13 +0100
Subject: Init tethapp

---
 tethapp.sh | 173 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100755 tethapp.sh

diff --git a/tethapp.sh b/tethapp.sh
new file mode 100755
index 0000000..3d859d8
--- /dev/null
+++ b/tethapp.sh
@@ -0,0 +1,173 @@
+#!/usr/bin/env bash
+
+# Ceci est un script bash ayant pour but de créer un partage de connection
+#
+# 
+
+ssid=🦄
+passphrase=chocolat
+
+ip=10.5.5.11
+network=10.5.5.0/24
+dhcp_range=$(echo 10.5.5.{12\,,254}),12h
+
+
+function guess_wifi {
+    for i in `ls /sys/class/net/`; do
+        if [ -d "/sys/class/net/$i/wireless" ] ; then 
+            _interface="$i"
+        fi
+    done
+    echo "${_interface}"
+}
+function guess_internet {
+    echo $(ip route show | grep 'default' |  \
+                    sed 's/.*dev/dev/' | sed 's/scope//' | \
+                    sed 's/src \([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}//g' | \
+                    sed 's/link//' |
+                    tr -s ' ' |
+                    cut -d' ' -f 2)
+}
+
+
+#net.ipv4.ip_forward=1
+#sudo snnnnet.ipv4.ip_forward=1
+#sudo systnnet.ipv4.ip_forward=1
+#sudo sysctl -w net.ipv4.ip_forward=1
+
+echo 'Voici la configuration des interfaces :'
+sudo ip a
+echo
+echo 
+echo 'Veuillez vérifier la table de routage :'
+sudo ip r
+echo
+
+
+echo 'Activation de IP fowarding'
+sudo sysctl -w net.ipv4.ip_forward=1
+
+if [ -z "${1}" ] ; then 
+    echo "Détection automatique de l'interface Wifi"
+    interface=$(guess_wifi)
+else
+    interface="${1}"
+fi
+
+echo "Interface Wifi : ${interface}"
+
+
+if [ -z "${2}" ] ; then 
+    echo "Détection automatique de l'interface connectée à internet"
+    interface_internet="$(guess_internet)"
+else
+    interface="${2}"
+fi
+
+
+# sudo iw dev wlp3s0 interface add wlan1 type station
+sudo pkill dnsmasq
+
+
+echo "Configuration de l'IP 10.5.5.11"
+sudo ifconfig "${interface}" up 10.5.5.11 netmask 255.255.255.0
+
+echo "Configuration de DNSQMASQ"
+
+cat <<< $(
+echo "
+    interface=${interface}
+    listen-address=${ip}
+    bind-interfaces
+    dhcp-range=${dhcp_range}"
+) > /tmp/dnsmasq.conf
+
+
+
+echo 'Lancement de DNSMASQ (DHCP sur le réseau 10.5.5.0/24)'
+sudo dnsmasq --conf-file=/tmp/dnsmasq.conf
+
+echo "Activation de l'interface ${interface}"
+sudo ip link set "${interface}" up
+
+echo 'Ajout du réseau dans la table de routage'
+sudo ip r add 10.5.5.0/24 via 10.5.5.11 dev "${interface}"
+
+
+echo "Routage des connections internet"
+sudo iptables -t nat -A POSTROUTING -o "${interface_internet}" -j MASQUERADE
+sudo iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+sudo iptables -A FORWARD -i "${interface}" -o "${interface_internet}" -j ACCEPT
+
+
+
+echo "Configuration de hostapd"
+
+cat <<< $(
+echo "
+interface=${interface}
+ssid=${ssid}
+
+wpa=1
+wpa_passphrase=${passphrase}
+
+channel=1
+hw_mode=g
+
+logger_syslog=-1
+logger_syslog_level=2
+logger_stdout=-1
+logger_stdout_level=2
+
+ctrl_interface=/var/run/hostapd
+ctrl_interface_group=0
+
+beacon_int=100
+dtim_period=2
+max_num_sta=255
+rts_threshold=2347
+fragm_threshold=2346
+macaddr_acl=0
+auth_algs=3
+ignore_broadcast_ssid=0
+
+wmm_enabled=1
+wmm_ac_bk_cwmin=4
+wmm_ac_bk_cwmax=10
+wmm_ac_bk_aifs=7
+wmm_ac_bk_txop_limit=0
+wmm_ac_bk_acm=0
+wmm_ac_be_aifs=3
+wmm_ac_be_cwmin=4
+wmm_ac_be_cwmax=10
+wmm_ac_be_txop_limit=0
+wmm_ac_be_acm=0
+wmm_ac_vi_aifs=2
+wmm_ac_vi_cwmin=3
+wmm_ac_vi_cwmax=4
+wmm_ac_vi_txop_limit=94
+wmm_ac_vi_acm=0
+wmm_ac_vo_aifs=2
+wmm_ac_vo_cwmin=2
+wmm_ac_vo_cwmax=3
+wmm_ac_vo_txop_limit=47
+wmm_ac_vo_acm=0
+
+vht_oper_chwidth=3
+eap_message=hello
+eapol_key_index_workaround=0
+eap_server=0"
+) > /tmp/hostapd.conf
+
+
+
+echo "Lancement du hostpot Wifi"
+sudo hostapd /tmp/hostapd.conf
+
+echo 'Clean des iptables'
+sudo iptables --flush
+sudo iptables -t nat --flush
+
+echo 'Bye 💋'
+echo 'Have a nice day <3'
+
-- 
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