from libc cimport *

cdef object inet_ntop (int af, void *sockaddr) :
    """
        Wrapper around inet_ntop, returning a PyString
    """

    # XXX: longest possible address...
    cdef char buf[INET6_ADDRSTRLEN]

    if c_inet_ntop(af, sockaddr, buf, sizeof(buf)) == NULL :
        # XXX: errno?
        raise OSError(errno)
    
    # autoconvert -> str
    return buf

cdef object inet_pton (int af, char *addr, void *sockaddr_out) :
    if c_inet_pton(af, addr, sockaddr_out) <= 0 :
        raise NameError("Invalid network address for specified address family: %r" % (addr, ))

cdef object getnameinfo (sockaddr *sa, socklen_t salen, int flags) :
    cdef char hostbuf[NI_MAXHOST]
    cdef char servbuf[NI_MAXSERV]
    cdef int err

    err = c_getnameinfo(sa, salen, hostbuf, sizeof(hostbuf), servbuf, sizeof(servbuf), flags)

    if err :
        # XXX: raise a GAIError
        raise Exception(gai_strerror(err))

    else :
        return hostbuf, servbuf