def getnameinfo(self, ip_port, flags, callback):
if not callable(callback):
raise AresError("a callable is required")
ip, port = ip_port
if port < 0 or port > 65535:
raise ValueError("port must be between 0 and 65535")
sa4 = _ffi.new("struct sockaddr_in*")
sa6 = _ffi.new("struct sockaddr_in6*")
if 1 == _lib.ares_inet_pton(socket.AF_INET, s2b(ip), _ffi.addressof(sa4.sin_addr)):
sa4.sin_family = socket.AF_INET
sa4.sin_port = socket.htons(port)
sa = sa4
elif 1 == _lib.ares_inet_pton(socket.AF_INET6, s2b(ip), _ffi.addressof(sa6.sin6_addr)):
sa6.sin6_family = socket.AF_INET6
sa6.sin6_port = socket.htons(port)
sa = sa6
else:
raise ValueError("invalid IP address")
userdata = _ffi.new_handle(callback)
_global_set.add(userdata)
_lib.ares_getnameinfo(self.channel, _ffi.cast("struct sockaddr*", sa), _ffi.sizeof(sa[0]), flags, _nameinfo_cb, userdata)
def __init__(self, ares_addrttl):
buf = _ffi.new("char[]", _lib.INET6_ADDRSTRLEN)
if _ffi.typeof(ares_addrttl) is _ffi.typeof("struct ares_addrttl"):
_lib.ares_inet_ntop(socket.AF_INET, _ffi.addressof(ares_addrttl.ipaddr), buf, _lib.INET6_ADDRSTRLEN)
elif _ffi.typeof(ares_addrttl) is _ffi.typeof("struct ares_addr6ttl"):
_lib.ares_inet_ntop(socket.AF_INET6, _ffi.addressof(ares_addrttl.ip6addr), buf, _lib.INET6_ADDRSTRLEN)
else:
raise TypeError()
self.host = _ffi_string(buf, _lib.INET6_ADDRSTRLEN)
self.ttl = ares_addrttl.ttl
def _set_servers(self, servers):
c = _ffi.new("struct ares_addr_node[%d]" % len(servers))
for i in range(len(servers)):
if 1 == _lib.ares_inet_pton(socket.AF_INET, s2b(servers[i]), _ffi.addressof(c[i].addr.addr4)):
c[i].family = socket.AF_INET
elif 1 == _lib.ares_inet_pton(socket.AF_INET6, s2b(servers[i]), _ffi.addressof(c[i].addr.addr6)):
c[i].family = socket.AF_INET6
else:
raise ValueError("invalid IP address")
if i > 0:
c[i - 1].next = _ffi.addressof(c[i])
r = _lib.ares_set_servers(self.channel, c)
if r != _lib.ARES_SUCCESS:
raise AresError()
def _get_servers(self):
servers = _ffi.new("struct ares_addr_node **")
r = _lib.ares_get_servers(self.channel, servers)
if r != ARES_SUCCESS:
raise AresError(errno.strerror(r))
server_list = []
server = _ffi.new("struct ares_addr_node **", servers[0])
while True:
if server == _ffi.NULL:
break
ip = _ffi.new("char []", _lib.INET6_ADDRSTRLEN)
if _ffi.NULL != _lib.ares_inet_ntop(server.family, _ffi.addressof(server.addr), ip, _lib.INET6_ADDRSTRLEN):
server_list.append(_ffi_string(ip, _lib.INET6_ADDRSTRLEN))
server = server.next
return server_list
