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