git.librecmc.org Git - librecmc/librecmc-fossil.git/blob

   1 #!/bin/ash
   2 export LC_ALL=en_US.UTF-8
   3
   4 # TODO
   5 # * dns und gateway vom dhcp-server übernehmen, erst setzen, wenn ip erhalten
   6
   7 # vars
   8
   9 remoteaddresses="{{#peerings}}{{ip}} {{/peerings}}{{#missioncontrol}}{{ip}} {{/missioncontrol}}"
  10
  11 orggatewayfile="/tmp/cjdns_org_gw"
  12
  13 network_profile="$(cat /etc/enigmabox/network-profile)"
  14 [[ "$network_profile" = "alix" ]] && clearnet_interface="eth0"
  15 [[ "$network_profile" = "apu" ]] && clearnet_interface="eth2"
  16 [[ "$network_profile" = "raspi" ]] && clearnet_interface="eth1"
  17
  18 ping="ping -c 5 -W 5"
  19 cjdns_request_tries="/tmp/cjdns_request_tries"
  20 netstat_file="/tmp/netstat"
  21 pidfile="/tmp/setup-cjdns-networking.pid"
  22 opmode="{{wlan_opmode}}"
  23 ssid="{{wlan_ssid}}"
  24 wep_pass="{{wlan_pass}}"
  25 security="{{wlan_security}}"
  26 dynamic_output="/tmp/dynamic_output"
  27
  28 {{#if_internet_gateway}}
  29 request_internet="yes"
  30 {{/if_internet_gateway}}
  31
  32 {{^if_internet_gateway}}
  33 request_internet="no"
  34 {{/if_internet_gateway}}
  35
  36
  37
  38 # check if its already running
  39 if [[ "$1" != "startwifi" ]]; then
  40     kill -0 $(cat "$pidfile" 2> /dev/null) 2> /dev/null
  41     if [[ "$?" == "0" ]]; then
  42         echo "script is already running"
  43         exit 0
  44     fi
  45
  46     echo $$ > "$pidfile"
  47 fi
  48
  49
  50
  51 # functions
  52
  53 e() {
  54     echo 1>&2
  55     echo 1>&2
  56     echo "$1" 1>&2
  57 }
  58
  59 startwifi() {
  60     echo "please wait, configuring system..." > "$dynamic_output"
  61     /usr/sbin/cfengine-apply &> /dev/null
  62     echo "done" > "$dynamic_output"
  63
  64     /usr/sbin/setup-cjdns-networking &> "$dynamic_output"
  65
  66     exit 0 #the script should end here
  67 }
  68
  69 dhcp() {
  70     ifconfig "$clearnet_interface" up
  71
  72     if [[ $( route -n | grep ^0.0.0.0 | wc -l ) -eq 0 ]]; then
  73         e "dhcp request $clearnet_interface"
  74         udhcpc -i "$clearnet_interface" --now
  75     fi
  76 }
  77
  78 start_wpa() {
  79     e "start WPA session"
  80
  81     ifconfig wlan0 down
  82     killall wpa_supplicant
  83
  84     # make sure wpa_supplicant is absent
  85     rm "/var/run/wpa_supplicant/wlan0" 2> /dev/null
  86
  87     sleep 2
  88
  89     ifconfig wlan0 up
  90     wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf -B
  91
  92     sleep 2
  93 }
  94
  95 start_wep() {
  96 {{#if_wlan_pass}}
  97     e "start WEP session"
  98     ifconfig wlan0 up
  99     iwconfig wlan0 essid "$ssid"
 100     iwconfig wlan0 key "d:0:$wep_pass"
 101 {{/if_wlan_pass}}
 102 {{^if_wlan_pass}}
 103     e "connecting to AP"
 104     ifconfig wlan0 up
 105     iwconfig wlan0 essid "$ssid"
 106 {{/if_wlan_pass}}
 107 }
 108
 109 request_cjdns_internet() {
 110     try=$(cat "$cjdns_request_tries" 2> /dev/null)
 111     try=$(($try+1))
 112     echo "$try" > "$cjdns_request_tries"
 113
 114     # try another countryserver after the 2nd try
 115     if [[ "$try" -ge 2 ]]; then
 116         e "switching to an alternative server"
 117         curl http://127.0.0.1:8000/api/v1/set_next_country &> /dev/null
 118         /usr/sbin/cfengine-apply
 119     fi
 120
 121     # request cjdns internet via script after the 3rd try
 122     if [[ "$try" -ge 3 ]]; then
 123         e "request cjdns internet"
 124         /usr/sbin/request-internet
 125     fi
 126 }
 127
 128 start_cjdns() {
 129     if [[ "$(/etc/init.d/cjdns status)" != "running" ]]; then
 130         e "starting cjdns"
 131         /etc/init.d/cjdns start
 132     fi
 133 }
 134
 135 restart_cjdns() {
 136     e "restarting cjdns"
 137     /etc/init.d/cjdns restart
 138 }
 139
 140 get_vpn_gateway() {
 141     ifconfig tun0 2> /dev/null | grep "inet addr" | cut -d: -f2 | awk '{ print $1 }'
 142 }
 143
 144 get_original_gateway() {
 145     if [[ -f "$orggatewayfile" ]]; then
 146         org_gw=$(cat "$orggatewayfile")
 147     else
 148         org_gw=$(route -n | grep '^0.0.0.0' | awk '{ print $2 }')
 149         echo "$org_gw" > "$orggatewayfile"
 150     fi
 151     echo "$org_gw"
 152 }
 153
 154 gateway_is_up() {
 155     vpn_gateway=$(get_vpn_gateway)
 156     if [[ "$vpn_gateway" != "" ]]; then
 157         echo true
 158     fi
 159 }
 160
 161 interface_dhcp_success() {
 162     if [[ "$(ifconfig "$clearnet_interface" | grep 'inet addr' | wc -l)" -gt 0 ]]; then
 163         echo true
 164     fi
 165 }
 166
 167 mtu() {
 168     if [[ "$(ifconfig tun0 2> /dev/null | grep -i mtu | awk '{ print $6 }' | cut -d: -f 2)" -ne 1300 ]]; then
 169         e "setting mtu"
 170         ifconfig tun0 mtu 1300
 171     fi
 172 }
 173
 174 original_gateway() {
 175     original_gateway=$(get_original_gateway)
 176     for remoteaddress in $remoteaddresses; do
 177         if [[ "$(route -n | egrep "$remoteaddress.*?$original_gateway" | wc -l)" -eq 0 ]]; then
 178             e "setting route $remoteaddress via $original_gateway dev $clearnet_interface"
 179             route add "$remoteaddress" gw "$original_gateway" "$clearnet_interface"
 180         fi
 181     done
 182 }
 183
 184 defaultroute() {
 185     original_gateway=$(get_original_gateway)
 186     vpn_gateway=$(get_vpn_gateway)
 187     if [[ "$(route -n | egrep "0.0.0.0.*?$vpn_gateway" | wc -l)" -eq 0 ]]; then
 188         e "setting defaultroute"
 189         route del default
 190         route add default gw "$vpn_gateway" tun0
 191     fi
 192 }
 193
 194 set_network_parameters() {
 195     mtu
 196     original_gateway
 197     defaultroute
 198 }
 199
 200 check_for_internet() {
 201     # check for internet. if only one server with a direct route is pingable,
 202     # we have an internet connection
 203     for remoteaddress in $remoteaddresses; do
 204         if [[ "$($ping "$remoteaddress" | grep 'bytes from')" ]]; then
 205             echo true
 206             break
 207         fi
 208     done
 209 }
 210
 211 set_status() {
 212     key=$1
 213     val=$2
 214     echo "$val" > "$netstat_file-$key"
 215 }
 216
 217
 218
 219 # params
 220 [[ "$1" == "startwifi" ]] && startwifi "$2"
 221
 222
 223
 224 # logic
 225
 226 # ensure dhcpd is running
 227 if [[ $( pidof dhcpd | wc -l ) -eq 0 ]]; then
 228     /etc/init.d/dhcpd restart
 229 fi
 230
 231 # ensure radvd is running
 232 if [[ "$(pidof radvd | wc -l)" -eq 0 ]]; then
 233     /etc/init.d/radvd restart
 234 fi
 235
 236 # setup wifi if available
 237 if [[ -e "/sys/class/net/wlan0" ]]; then
 238     e "wifi detected"
 239
 240     if [[ "$opmode" = "mesh" ]]; then
 241         e "opmode: mesh"
 242
 243         # check if wlan0 has already started
 244         if [[ "$(iwconfig wlan0 | grep 'ESSID' | grep 'cjdns' | wc -l)" -eq 0 \
 245             || "$(iwconfig wlan0 | grep 'Mode:' | grep 'Ad-Hoc' | wc -l)" -eq 0 ]]; then
 246             e "starting ad-hoc mesh"
 247             ifconfig wlan0 down
 248             iwconfig wlan0 mode ad-hoc
 249             iwconfig wlan0 essid cjdns
 250             ifconfig wlan0 up
 251             restart_cjdns
 252         else
 253             e "ad-hoc mesh is running fine"
 254         fi
 255     fi
 256
 257     if [[ "$opmode" = "client" ]]; then
 258         e "opmode: client"
 259
 260         clearnet_interface=wlan0
 261
 262         # check if wlan0 has already started
 263         if [[ "$(ifconfig wlan0 | grep 'inet addr' | wc -l)" -eq 0 \
 264             || "$(iwconfig wlan0 | grep 'Access Point: Not-Associated' | wc -l)" -gt 0 ]]; then
 265             if [[ "$security" = "WPA" ]]; then
 266                 start_wpa
 267             else
 268                 start_wep
 269             fi
 270         else
 271             e "wlan client is running fine"
 272         fi
 273         #TODO: connect to unencrypted wifi
 274     fi
 275 fi
 276
 277 if [[ "$(gateway_is_up)" == "true" ]]; then
 278     set_network_parameters
 279     e "checking internet connectivity over cjdns"
 280     if [[ "$($ping 8.8.8.8 | grep 'bytes from')" ]]; then
 281         echo "We have internet. Good."
 282         set_status "dhcp" 1
 283         set_status "internet" 1
 284         set_status "cjdns" 1
 285         set_status "cjdns_internet" 1
 286         rm "$cjdns_request_tries" 2> /dev/null
 287         exit
 288     fi
 289 fi
 290
 291 echo "No internet via cjdns. Checking for regular internet connection..."
 292 set_status "dhcp" 0
 293 set_status "internet" 0
 294 set_status "cjdns" 0
 295 set_status "cjdns_internet" 0
 296
 297 # request dhcp
 298 dhcp
 299
 300 if [[ "$(interface_dhcp_success)" == "true" ]]; then
 301     set_status "dhcp" 1
 302 fi
 303
 304 wehaveinternet="no"
 305 if [[ "$(check_for_internet)" == "true" ]]; then
 306     set_status "internet" 1
 307     wehaveinternet="yes"
 308 fi
 309
 310 if [[ "$wehaveinternet" == "yes" && "$request_internet" == "yes" ]]; then
 311     request_cjdns_internet
 312     restart_cjdns
 313     set_status "cjdns" 1
 314     for i in $(seq 60 -1 1); do
 315         echo "waiting $i seconds for gateway to come up..."
 316         if [[ "$(gateway_is_up)" == "true" ]]; then
 317             e "gateway is up."
 318             set_network_parameters
 319             e "checking internet connectivity over cjdns"
 320             if [[ "$($ping 8.8.8.8 | grep 'bytes from')" ]]; then
 321                 echo "We have internet. Good."
 322                 set_status "dhcp" 1
 323                 set_status "internet" 1
 324                 set_status "cjdns" 1
 325                 set_status "cjdns_internet" 1
 326                 rm "$cjdns_request_tries" 2> /dev/null
 327                 exit
 328             else
 329                 echo "Gateway is up, but no internet. Requesting..."
 330                 /usr/sbin/request-internet
 331                 exit
 332             fi
 333         fi
 334         sleep 1
 335     done
 336 else
 337     e "no internet via cjdns."
 338     # just ensure that cjdns is running, but DO NOT restart it!
 339     # since local phone calls may be active.
 340     start_cjdns
 341     set_status "cjdns" 1
 342 fi
 343