static void addr_callback(void *arg, int status, int timeouts, unsigned char *abuf, int alen) { struct addr_query *aquery = (struct addr_query *) arg; struct hostent *host; size_t addrlen; aquery->timeouts += timeouts; if (status == ARES_SUCCESS) { if (aquery->addr.family == AF_INET) { addrlen = sizeof(struct in_addr); status = ares_parse_ptr_reply(abuf, alen, &aquery->addr.addrV4, (int)addrlen, AF_INET, &host); } else { addrlen = sizeof(struct in6_addr); status = ares_parse_ptr_reply(abuf, alen, &aquery->addr.addrV6, (int)addrlen, AF_INET6, &host); } end_aquery(aquery, status, host); } else if (status == ARES_EDESTRUCTION) end_aquery(aquery, status, NULL); else next_lookup(aquery); }
static void query_ptr_cb(void *arg, int status,int timeouts, unsigned char *answer_buf, int answer_len) { PyGILState_STATE gstate = PyGILState_Ensure(); int parse_status; char *addr = "0.0.0.0"; char **ptr; struct hostent *hostent = NULL; PyObject *dns_result, *errorno, *tmp, *result, *callback; callback = (PyObject *)arg; ASSERT(callback); if (status != ARES_SUCCESS) { errorno = PyInt_FromLong((long)status); dns_result = Py_None; Py_INCREF(Py_None); goto callback; } /* addr is only used to populate the hostent struct, it's not used to validate the response */ parse_status = ares_parse_ptr_reply(answer_buf, answer_len, addr, sizeof(addr)-1, AF_INET, &hostent); if (parse_status != ARES_SUCCESS) { errorno = PyInt_FromLong((long)parse_status); dns_result = Py_None; Py_INCREF(Py_None); goto callback; } dns_result = PyList_New(0); if (!dns_result) { PyErr_NoMemory(); PyErr_WriteUnraisable(Py_None); errorno = PyInt_FromLong((long)ARES_ENOMEM); dns_result = Py_None; Py_INCREF(Py_None); goto callback; } for (ptr = hostent->h_aliases; *ptr != NULL; ptr++) { tmp = Py_BuildValue("s", *ptr); if (tmp == NULL) { break; } PyList_Append(dns_result, tmp); Py_DECREF(tmp); } errorno = Py_None; Py_INCREF(Py_None); callback: result = PyObject_CallFunctionObjArgs(callback, dns_result, errorno, NULL); if (result == NULL) { PyErr_WriteUnraisable(callback); } Py_XDECREF(result); Py_DECREF(dns_result); Py_DECREF(errorno); if (hostent) { ares_free_hostent(hostent); } Py_DECREF(callback); PyGILState_Release(gstate); }