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135 lines
3.3 KiB
Go
135 lines
3.3 KiB
Go
package sockaddr
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import (
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"fmt"
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"strings"
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)
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type UnixSock struct {
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SockAddr
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path string
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}
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type UnixSocks []*UnixSock
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// unixAttrMap is a map of the UnixSockAddr type-specific attributes.
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var unixAttrMap map[AttrName]func(UnixSock) string
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var unixAttrs []AttrName
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func init() {
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unixAttrInit()
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}
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// NewUnixSock creates an UnixSock from a string path. String can be in the
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// form of either URI-based string (e.g. `file:///etc/passwd`), an absolute
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// path (e.g. `/etc/passwd`), or a relative path (e.g. `./foo`).
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func NewUnixSock(s string) (ret UnixSock, err error) {
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ret.path = s
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return ret, nil
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}
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// CmpAddress follows the Cmp() standard protocol and returns:
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//
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// - -1 If the receiver should sort first because its name lexically sorts before arg
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// - 0 if the SockAddr arg is not a UnixSock, or is a UnixSock with the same path.
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// - 1 If the argument should sort first.
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func (us UnixSock) CmpAddress(sa SockAddr) int {
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usb, ok := sa.(UnixSock)
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if !ok {
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return sortDeferDecision
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}
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return strings.Compare(us.Path(), usb.Path())
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}
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// DialPacketArgs returns the arguments required to be passed to net.DialUnix()
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// with the `unixgram` network type.
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func (us UnixSock) DialPacketArgs() (network, dialArgs string) {
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return "unixgram", us.path
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}
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// DialStreamArgs returns the arguments required to be passed to net.DialUnix()
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// with the `unix` network type.
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func (us UnixSock) DialStreamArgs() (network, dialArgs string) {
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return "unix", us.path
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}
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// Equal returns true if a SockAddr is equal to the receiving UnixSock.
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func (us UnixSock) Equal(sa SockAddr) bool {
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usb, ok := sa.(UnixSock)
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if !ok {
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return false
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}
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if us.Path() != usb.Path() {
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return false
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}
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return true
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}
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// ListenPacketArgs returns the arguments required to be passed to
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// net.ListenUnixgram() with the `unixgram` network type.
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func (us UnixSock) ListenPacketArgs() (network, dialArgs string) {
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return "unixgram", us.path
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}
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// ListenStreamArgs returns the arguments required to be passed to
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// net.ListenUnix() with the `unix` network type.
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func (us UnixSock) ListenStreamArgs() (network, dialArgs string) {
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return "unix", us.path
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}
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// MustUnixSock is a helper method that must return an UnixSock or panic on
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// invalid input.
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func MustUnixSock(addr string) UnixSock {
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us, err := NewUnixSock(addr)
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if err != nil {
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panic(fmt.Sprintf("Unable to create a UnixSock from %+q: %v", addr, err))
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}
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return us
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}
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// Path returns the given path of the UnixSock
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func (us UnixSock) Path() string {
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return us.path
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}
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// String returns the path of the UnixSock
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func (us UnixSock) String() string {
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return fmt.Sprintf("%+q", us.path)
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}
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// Type is used as a type switch and returns TypeUnix
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func (UnixSock) Type() SockAddrType {
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return TypeUnix
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}
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// UnixSockAttrs returns a list of attributes supported by the UnixSockAddr type
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func UnixSockAttrs() []AttrName {
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return unixAttrs
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}
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// UnixSockAttr returns a string representation of an attribute for the given
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// UnixSock.
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func UnixSockAttr(us UnixSock, attrName AttrName) string {
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fn, found := unixAttrMap[attrName]
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if !found {
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return ""
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}
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return fn(us)
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}
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// unixAttrInit is called once at init()
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func unixAttrInit() {
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// Sorted for human readability
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unixAttrs = []AttrName{
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"path",
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}
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unixAttrMap = map[AttrName]func(us UnixSock) string{
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"path": func(us UnixSock) string {
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return us.Path()
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},
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}
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}
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