// networkReleaseAddress release the ip address
func networkReleaseAddress(nwCfg *mastercfg.CfgNetworkState, ipAddress string) error {
isIPv6 := netutils.IsIPv6(ipAddress)
if isIPv6 {
hostID, err := netutils.GetIPv6HostID(nwCfg.SubnetIP, nwCfg.SubnetLen, ipAddress)
if err != nil {
log.Errorf("error getting host id from hostIP %s Subnet %s/%d. Error: %s",
ipAddress, nwCfg.SubnetIP, nwCfg.SubnetLen, err)
return err
}
// networkReleaseAddress is called from multiple places
// Make sure we decrement the EpCount only if the IPAddress
// was not already freed earlier
if _, found := nwCfg.IPv6AllocMap[hostID]; found {
nwCfg.EpAddrCount--
}
delete(nwCfg.IPv6AllocMap, hostID)
} else {
ipAddrValue, err := netutils.GetIPNumber(nwCfg.SubnetIP, nwCfg.SubnetLen, 32, ipAddress)
if err != nil {
log.Errorf("error getting host id from hostIP %s Subnet %s/%d. Error: %s",
ipAddress, nwCfg.SubnetIP, nwCfg.SubnetLen, err)
return err
}
// networkReleaseAddress is called from multiple places
// Make sure we decrement the EpCount only if the IPAddress
// was not already freed earlier
if nwCfg.IPAllocMap.Test(ipAddrValue) {
nwCfg.EpAddrCount--
}
nwCfg.IPAllocMap.Clear(ipAddrValue)
}
err := nwCfg.Write()
if err != nil {
log.Errorf("error writing nw config. Error: %s", err)
return err
}
return nil
}
// AllocAddressHandler allocates addresses
func AllocAddressHandler(w http.ResponseWriter, r *http.Request, vars map[string]string) (interface{}, error) {
var allocReq AddressAllocRequest
// Get object from the request
err := json.NewDecoder(r.Body).Decode(&allocReq)
if err != nil {
log.Errorf("Error decoding AllocAddressHandler. Err %v", err)
return nil, err
}
log.Infof("Received AddressAllocRequest: %+v", allocReq)
// Take a global lock for address allocation
addrMutex.Lock()
defer addrMutex.Unlock()
// Get hold of the state driver
stateDriver, err := utils.GetStateDriver()
if err != nil {
return nil, err
}
isIPv6 := netutils.IsIPv6(allocReq.AddressPool)
networkID := ""
// Determine the network id to use
if allocReq.NetworkID != "" {
networkID = allocReq.NetworkID
} else {
// find the network from address pool
subnetIP := strings.Split(allocReq.AddressPool, "/")[0]
subnetLen := strings.Split(allocReq.AddressPool, "/")[1]
tenant := ""
if strings.Contains(subnetLen, ":") {
tenant = strings.Split(subnetLen, ":")[1]
subnetLen = strings.Split(subnetLen, ":")[0]
}
// find the network from networkID
readNet := &mastercfg.CfgNetworkState{}
readNet.StateDriver = stateDriver
netList, err := readNet.ReadAll()
if err != nil {
if !strings.Contains(err.Error(), "Key not found") {
log.Errorf("error reading keys during host create. Error: %s", err)
return nil, err
}
}
for _, ncfg := range netList {
nw := ncfg.(*mastercfg.CfgNetworkState)
if isIPv6 && nw.IPv6Subnet == subnetIP && fmt.Sprintf("%d", nw.IPv6SubnetLen) == subnetLen {
if tenant == "" || nw.Tenant == tenant {
networkID = nw.ID
}
} else if nw.SubnetIP == subnetIP && fmt.Sprintf("%d", nw.SubnetLen) == subnetLen {
if tenant == "" || nw.Tenant == tenant {
networkID = nw.ID
}
}
}
}
if networkID == "" {
log.Errorf("Could not find the network for: %s", allocReq.NetworkID)
return nil, errors.New("Network not found")
}
// find the network from network id
nwCfg := &mastercfg.CfgNetworkState{}
nwCfg.StateDriver = stateDriver
err = nwCfg.Read(networkID)
if err != nil {
log.Errorf("network %s is not operational", allocReq.NetworkID)
return nil, err
}
// Alloc addresses
addr, err := networkAllocAddress(nwCfg, allocReq.PreferredIPv4Address, netutils.IsIPv6(allocReq.AddressPool))
if err != nil {
log.Errorf("Failed to allocate address. Err: %v", err)
return nil, err
}
var subnetLen uint
if isIPv6 {
subnetLen = nwCfg.IPv6SubnetLen
} else {
subnetLen = nwCfg.SubnetLen
}
// Build the response
aresp := AddressAllocResponse{
NetworkID: allocReq.NetworkID,
IPv4Address: addr + "/" + fmt.Sprintf("%d", subnetLen),
}
return aresp, nil
}