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package sockaddr
import (
"fmt"
"net"
)
// IfAddr is a union of a SockAddr and a net.Interface.
type IfAddr struct {
SockAddr
net.Interface
}
// Attr returns the named attribute as a string
func (ifAddr IfAddr) Attr(attrName AttrName) (string, error) {
val := IfAddrAttr(ifAddr, attrName)
if val != "" {
return val, nil
}
return Attr(ifAddr.SockAddr, attrName)
}
// Attr returns the named attribute as a string
func Attr(sa SockAddr, attrName AttrName) (string, error) {
switch sockType := sa.Type(); {
case sockType&TypeIP != 0:
ip := *ToIPAddr(sa)
attrVal := IPAddrAttr(ip, attrName)
if attrVal != "" {
return attrVal, nil
}
if sockType == TypeIPv4 {
ipv4 := *ToIPv4Addr(sa)
attrVal := IPv4AddrAttr(ipv4, attrName)
if attrVal != "" {
return attrVal, nil
}
} else if sockType == TypeIPv6 {
ipv6 := *ToIPv6Addr(sa)
attrVal := IPv6AddrAttr(ipv6, attrName)
if attrVal != "" {
return attrVal, nil
}
}
case sockType == TypeUnix:
us := *ToUnixSock(sa)
attrVal := UnixSockAttr(us, attrName)
if attrVal != "" {
return attrVal, nil
}
}
// Non type-specific attributes
switch attrName {
case "string":
return sa.String(), nil
case "type":
return sa.Type().String(), nil
}
return "", fmt.Errorf("unsupported attribute name %q", attrName)
}
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