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net/interfaces: add List, GetList

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And start moving funcs to methods on List.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2021-10-14 14:55:55 -07:00 committed by Brad Fitzpatrick
parent 14f9c75293
commit 4a3e2842d9
1 changed files with 31 additions and 7 deletions
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38
net/interfaces/interfaces.go
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@ -183,14 +183,20 @@ func (i Interface) Addrs() ([]net.Addr, error) {
return i.Interface.Addrs() return i.Interface.Addrs()
} }
// ForeachInterfaceAddress calls fn for each interface's address on // ForeachInterfaceAddress is a wrapper for GetList, then
// the machine. The IPPrefix's IP is the IP address assigned to the // List.ForeachInterfaceAddress.
// interface, and Bits are the subnet mask.
func ForeachInterfaceAddress(fn func(Interface, netaddr.IPPrefix)) error { func ForeachInterfaceAddress(fn func(Interface, netaddr.IPPrefix)) error {
ifaces, err := netInterfaces() ifaces, err := GetList()
if err != nil { if err != nil {
return err return err
} }
return ifaces.ForeachInterfaceAddress(fn)
}
// ForeachInterfaceAddress calls fn for each interface in ifaces, with
// all its addresses. The IPPrefix's IP is the IP address assigned to
// the interface, and Bits are the subnet mask.
func (ifaces List) ForeachInterfaceAddress(fn func(Interface, netaddr.IPPrefix)) error {
for _, iface := range ifaces { for _, iface := range ifaces {
addrs, err := iface.Addrs() addrs, err := iface.Addrs()
if err != nil { if err != nil {
@ -208,11 +214,21 @@ func ForeachInterfaceAddress(fn func(Interface, netaddr.IPPrefix)) error {
return nil return nil
} }
// ForeachInterface calls fn for each interface on the machine, with // ForeachInterface is a wrapper for GetList, then
// List.ForeachInterface.
func ForeachInterface(fn func(Interface, []netaddr.IPPrefix)) error {
ifaces, err := GetList()
if err != nil {
return err
}
return ifaces.ForeachInterface(fn)
}
// ForeachInterface calls fn for each interface in ifaces, with
// all its addresses. The IPPrefix's IP is the IP address assigned to // all its addresses. The IPPrefix's IP is the IP address assigned to
// the interface, and Bits are the subnet mask. // the interface, and Bits are the subnet mask.
func ForeachInterface(fn func(Interface, []netaddr.IPPrefix)) error { func (ifaces List) ForeachInterface(fn func(Interface, []netaddr.IPPrefix)) error {
ifaces, err := netInterfaces() ifaces, err := GetList()
if err != nil { if err != nil {
return err return err
} }
@ -589,6 +605,14 @@ func RegisterInterfaceGetter(getInterfaces func() ([]Interface, error)) {
altNetInterfaces = getInterfaces altNetInterfaces = getInterfaces
} }
// List is a list of interfaces on the machine.
type List []Interface
// GetList returns the list of interfaces on the machine.
func GetList() (List, error) {
return netInterfaces()
}
// netInterfaces is a wrapper around the standard library's net.Interfaces // netInterfaces is a wrapper around the standard library's net.Interfaces
// that returns a []*Interface instead of a []net.Interface. // that returns a []*Interface instead of a []net.Interface.
// It exists because Android SDK 30 no longer permits Go's net.Interfaces // It exists because Android SDK 30 no longer permits Go's net.Interfaces