yane_module_dnsmasq

#!/bin/bash
#===============================================================================
# Dnsmasq
#  Ce module se charge de la gestion du service dnsmasq
#===============================================================================

#-------------------------------------------------------------------------------
# contantes
#-------------------------------------------------------------------------------
servicesVirtMode="docker"   # mode de virtualisation des services

#-------------------------------------------------------------------------------
# create services
#  Créer un hote puis y ajoute les fichiers de configuration
#   $1 : service name
#-------------------------------------------------------------------------------
yaneCreateService_dnsmasq () {
    if (( NBDNSMASQ > 0 )); then
      logMessage ERR "you can't have more than 1 dnsmasq"
      exit 1
    else
      export NBDNSMASQ=1
    fi
    logMessage LOG "Creating a dnsmasq service : $1 using $servicesVirtMode"
    createHost_$servicesVirtMode $1 ${serviceType[$1]}
    hostName[$1]=$1
    hostMode[$1]=$servicesVirtMode
    hostImage[$1]=${serviceType[$1]}
    # Load config files
    src=$(echo "${serviceConfig[$1]}" | cut -d! -f 1)
    dest=$(echo "${serviceConfig[$1]}" | cut -d! -f 2)
    yaneHostPopulateFS_$servicesVirtMode $1 $src $dest
}

#-------------------------------------------------------------------------------
# shutdown services
#   $1 : service name
#-------------------------------------------------------------------------------
yaneShutdownService_dnsmasq () {
   shutdownHost_$servicesVirtMode $1
}

#-------------------------------------------------------------------------------
# delete services
#   $1 : service name
#-------------------------------------------------------------------------------
yaneDeleteService_dnsmasq () {
   deleteHost_$servicesVirtMode $1
   $IP link del $SESSION_ID${serviceType[$1]}
}

#-------------------------------------------------------------------------------
# connect dnsmasq server to "internet"
#   $1 : service name
#-------------------------------------------------------------------------------
yaneRunService_dnsmasq () {
   #----------------------------------------------------------------------------
   # Constantes
   #----------------------------------------------------------------------------
   ip_addr_yanenet="" # adresse ip (CIDR) du réseau reliant le serveur dnsmasq et le réseau simulé
   ifName_service=$($IP netns exec ${SESSION_ID}_$1 ip route | awk '/default/ { print $5 }') #interface de la route par défaut

   interfaceService=$(echo "${bridgeInterfaces[@]}" | grep -b -o $1)
   if [ $? -eq 0 ]; then   # Vérifier si une interface de bridge entre le service et le réseau yane existe
      ip_addr_yanenet=$(echo ${bridgeInterfaces[@]} | cut -c $(echo $interfaceService | cut -d: -f 1)- | cut -d! -f 2 | cut -d: -f 3)
   else
      logMessage ERR "The service : $1 must be linked to hosts with a bridge"
      # exiting safely ?
      exit 1
   fi

   # Mise à jour du NAT du service pour donner accès à internet
   $IP netns exec ${SESSION_ID}_$1 iptables -P FORWARD DROP
   $IP netns exec ${SESSION_ID}_$1 iptables -F FORWARD
   $IP netns exec ${SESSION_ID}_$1 iptables -t nat -F
   $IP netns exec ${SESSION_ID}_$1 iptables -t nat -A POSTROUTING -s $ip_addr_yanenet -o $ifName_service -j MASQUERADE
   $IP netns exec ${SESSION_ID}_$1 iptables -A FORWARD -i $ifName_service -o v0 -j ACCEPT
   $IP netns exec ${SESSION_ID}_$1 iptables -A FORWARD -o $ifName_service -i v0 -j ACCEPT
}