func sockaddrToAny(sa syscall.Sockaddr) (*syscall.RawSockaddrAny, Socklen, error) {
if sa == nil {
return nil, 0, syscall.EINVAL
}
switch sa := sa.(type) {
case *syscall.SockaddrInet4:
if sa.Port < 0 || sa.Port > 0xFFFF {
return nil, 0, syscall.EINVAL
}
var raw syscall.RawSockaddrInet4
raw.Len = syscall.SizeofSockaddrInet4
raw.Family = syscall.AF_INET
p := (*[2]byte)(unsafe.Pointer(&raw.Port))
p[0] = byte(sa.Port >> 8)
p[1] = byte(sa.Port)
for i := 0; i < len(sa.Addr); i++ {
raw.Addr[i] = sa.Addr[i]
}
return (*syscall.RawSockaddrAny)(unsafe.Pointer(&raw)), Socklen(raw.Len), nil
case *syscall.SockaddrInet6:
if sa.Port < 0 || sa.Port > 0xFFFF {
return nil, 0, syscall.EINVAL
}
var raw syscall.RawSockaddrInet6
raw.Len = syscall.SizeofSockaddrInet6
raw.Family = syscall.AF_INET6
p := (*[2]byte)(unsafe.Pointer(&raw.Port))
p[0] = byte(sa.Port >> 8)
p[1] = byte(sa.Port)
raw.Scope_id = sa.ZoneId
for i := 0; i < len(sa.Addr); i++ {
raw.Addr[i] = sa.Addr[i]
}
return (*syscall.RawSockaddrAny)(unsafe.Pointer(&raw)), Socklen(raw.Len), nil
case *syscall.SockaddrUnix:
name := sa.Name
n := len(name)
var raw syscall.RawSockaddrUnix
if n >= len(raw.Path) || n == 0 {
return nil, 0, syscall.EINVAL
}
raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL
raw.Family = syscall.AF_UNIX
for i := 0; i < n; i++ {
raw.Path[i] = int8(name[i])
}
return (*syscall.RawSockaddrAny)(unsafe.Pointer(&raw)), Socklen(raw.Len), nil
case *syscall.SockaddrDatalink:
if sa.Index == 0 {
return nil, 0, syscall.EINVAL
}
var raw syscall.RawSockaddrDatalink
raw.Len = sa.Len
raw.Family = syscall.AF_LINK
raw.Index = sa.Index
raw.Type = sa.Type
raw.Nlen = sa.Nlen
raw.Alen = sa.Alen
raw.Slen = sa.Slen
for i := 0; i < len(raw.Data); i++ {
raw.Data[i] = sa.Data[i]
}
return (*syscall.RawSockaddrAny)(unsafe.Pointer(&raw)), syscall.SizeofSockaddrDatalink, nil
}
return nil, 0, syscall.EAFNOSUPPORT
}
