rancher/plugins
1
0
Fork 1
mirror of https://github.com/rancher/plugins.git synced 2025-09-15 06:37:42 +00:00
Code Issues Projects Releases Wiki Activity

pkg/utils/hwaddr: migrate code from IPAM pkg

Browse Source
This commit is contained in:
Stefan Junker
2016-06-28 12:51:58 -07:00
parent 96867eae05
commit 3a1354cff6
4 changed files with 111 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
pkg/ipam/ipam.go
View File

@@ -21,17 +21,12 @@ import (
"github.com/containernetworking/cni/pkg/invoke"
"github.com/containernetworking/cni/pkg/ip"
"github.com/containernetworking/cni/pkg/types"
"github.com/containernetworking/cni/pkg/utils/hwaddr"
"github.com/vishvananda/netlink"
"net"
"strconv"
"strings"
)
const (
// private mac prefix safe to use
PrivateMACPrefix = "0a:58"
// veth link dev type
vethLinkType = "veth"
)
@@ -58,7 +53,7 @@ func ConfigureIface(ifName string, res *types.Result) error {
// only set hardware address to veth when using ipv4
if link.Type() == vethLinkType && res.IP4 != nil {
hwAddr, err := GenerateHardwareAddr4(res.IP4.IP.IP, PrivateMACPrefix)
hwAddr, err := hwaddr.GenerateHardwareAddr4(res.IP4.IP.IP, hwaddr.PrivateMACPrefix)
if err != nil {
return fmt.Errorf("failed to generate hardware addr: %v", err)
}
@@ -88,44 +83,3 @@ func ConfigureIface(ifName string, res *types.Result) error {
return nil
}
type SupportIp4OnlyErr struct{ msg string }
func (e SupportIp4OnlyErr) Error() string { return e.msg }
type MacParseErr struct{ msg string }
func (e MacParseErr) Error() string { return e.msg }
type InvalidPrefixLengthErr struct{ msg string }
func (e InvalidPrefixLengthErr) Error() string { return e.msg }
// GenerateHardwareAddr4 generates 48 bit virtual mac addresses based on the IP4 input.
func GenerateHardwareAddr4(ip net.IP, prefix string) (net.HardwareAddr, error) {
switch {
case ip.To4() == nil:
return nil, SupportIp4OnlyErr{msg: "GenerateHardwareAddr4 only supports valid IPv4 address as input"}
case len(prefix) != len(PrivateMACPrefix):
return nil, InvalidPrefixLengthErr{msg: fmt.Sprintf(
"Prefix has length %d instead of %d", len(prefix), len(PrivateMACPrefix)),
}
}
mac := prefix
sections := strings.Split(ip.String(), ".")
for _, s := range sections {
i, _ := strconv.Atoi(s)
mac = mac + ":" + fmt.Sprintf("%02x", i)
}
hwAddr, err := net.ParseMAC(mac)
if err != nil {
return nil, MacParseErr{msg: fmt.Sprintf(
"Failed to parse mac address %q generated based on IP %q due to: %v", mac, ip, err),
}
}
return hwAddr, nil
}