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|
package network
import (
"net"
"os"
"path/filepath"
)
const (
defaultIPv4Route = "0.0.0.0/0"
defaultIPv6Route = "::/0"
)
// NcList describes a generic map
type NcList map[string]interface{}
// NewNcList creates a generic map of values with string
// keys and adds in version and network name
func NewNcList(name, version string) NcList {
n := NcList{}
n["cniVersion"] = version
n["name"] = name
return n
}
// NewHostLocalBridge creates a new LocalBridge for host-local
func NewHostLocalBridge(name string, isGateWay, isDefaultGW, ipMasq bool, ipamConf IPAMHostLocalConf) *HostLocalBridge {
hostLocalBridge := HostLocalBridge{
PluginType: "bridge",
BrName: name,
IPMasq: ipMasq,
HairpinMode: true,
IPAM: ipamConf,
}
if isGateWay {
hostLocalBridge.IsGW = true
}
if isDefaultGW {
hostLocalBridge.IsDefaultGW = true
}
return &hostLocalBridge
}
// NewIPAMHostLocalConf creates a new IPAMHostLocal configfuration
func NewIPAMHostLocalConf(subnet *net.IPNet, routes []IPAMRoute, ipRange net.IPNet, gw net.IP) (IPAMHostLocalConf, error) {
var ipamRanges [][]IPAMLocalHostRangeConf
ipamConf := IPAMHostLocalConf{
PluginType: "host-local",
Routes: routes,
// Possible future support ? Leaving for clues
//ResolveConf: "",
//DataDir: ""
}
IPAMRange, err := newIPAMLocalHostRange(subnet, &ipRange, &gw)
if err != nil {
return ipamConf, err
}
ipamRanges = append(ipamRanges, IPAMRange)
ipamConf.Ranges = ipamRanges
return ipamConf, nil
}
func newIPAMLocalHostRange(subnet *net.IPNet, ipRange *net.IPNet, gw *net.IP) ([]IPAMLocalHostRangeConf, error) { //nolint:interfacer
var ranges []IPAMLocalHostRangeConf
hostRange := IPAMLocalHostRangeConf{
Subnet: subnet.String(),
}
// an user provided a range, we add it here
if ipRange.IP != nil {
first, err := FirstIPInSubnet(ipRange)
if err != nil {
return nil, err
}
last, err := LastIPInSubnet(ipRange)
if err != nil {
return nil, err
}
hostRange.RangeStart = first.String()
hostRange.RangeEnd = last.String()
}
if gw != nil {
hostRange.Gateway = gw.String()
}
ranges = append(ranges, hostRange)
return ranges, nil
}
// NewIPAMRoute creates a new IPAM route configuration
func NewIPAMRoute(r *net.IPNet) IPAMRoute { //nolint:interfacer
return IPAMRoute{Dest: r.String()}
}
// NewIPAMDefaultRoute creates a new IPAMDefault route of
// 0.0.0.0/0 for IPv4 or ::/0 for IPv6
func NewIPAMDefaultRoute(isIPv6 bool) (IPAMRoute, error) {
route := defaultIPv4Route
if isIPv6 {
route = defaultIPv6Route
}
_, n, err := net.ParseCIDR(route)
if err != nil {
return IPAMRoute{}, err
}
return NewIPAMRoute(n), nil
}
// NewPortMapPlugin creates a predefined, default portmapping
// configuration
func NewPortMapPlugin() PortMapConfig {
caps := make(map[string]bool)
caps["portMappings"] = true
p := PortMapConfig{
PluginType: "portmap",
Capabilities: caps,
}
return p
}
// NewFirewallPlugin creates a generic firewall plugin
func NewFirewallPlugin() FirewallConfig {
return FirewallConfig{
PluginType: "firewall",
}
}
// NewDNSNamePlugin creates the dnsname config with a given
// domainname
func NewDNSNamePlugin(domainName string) DNSNameConfig {
return DNSNameConfig{
PluginType: "dnsname",
DomainName: domainName,
}
}
// HasDNSNamePlugin looks to see if the dnsname cni plugin is present
func HasDNSNamePlugin(paths []string) bool {
for _, p := range paths {
if _, err := os.Stat(filepath.Join(p, "dnsname")); err == nil {
return true
}
}
return false
}
// NewMacVLANPlugin creates a macvlanconfig with a given device name
func NewMacVLANPlugin(device string) MacVLANConfig {
i := IPAMDHCP{DHCP: "dhcp"}
m := MacVLANConfig{
PluginType: "macvlan",
Master: device,
IPAM: i,
}
return m
}
|
