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/* Copyright (c) 2011 Denis Bilenko. See LICENSE for details. */
#include "Python.h"
#ifdef CARES_EMBED
#include "ares_setup.h"
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#include "ares.h"
#include "cares_ntop.h"
#include "cares_pton.h"
#if PY_VERSION_HEX < 0x02060000
#define PyBytes_FromString PyString_FromString
#endif
static PyObject* _socket_error = 0;
static PyObject*
get_socket_object(PyObject** pobject, const char* name)
{
if (!*pobject) {
PyObject* _socket;
_socket = PyImport_ImportModule("_socket");
if (_socket) {
*pobject = PyObject_GetAttrString(_socket, name);
if (!*pobject) {
PyErr_WriteUnraisable(Py_None);
}
Py_DECREF(_socket);
}
else {
PyErr_WriteUnraisable(Py_None);
}
if (!*pobject) {
*pobject = PyExc_IOError;
}
}
return *pobject;
}
static int
gevent_append_addr(PyObject* list, int family, void* src, char* tmpbuf, size_t tmpsize) {
int status = -1;
PyObject* tmp;
if (ares_inet_ntop(family, src, tmpbuf, tmpsize)) {
tmp = PyBytes_FromString(tmpbuf);
if (tmp) {
status = PyList_Append(list, tmp);
Py_DECREF(tmp);
}
}
return status;
}
static PyObject*
parse_h_aliases(struct hostent *h)
{
char **pch;
PyObject *result = NULL;
PyObject *tmp;
result = PyList_New(0);
if (result && h->h_aliases) {
for (pch = h->h_aliases; *pch != NULL; pch++) {
if (*pch != h->h_name && strcmp(*pch, h->h_name)) {
int status;
tmp = PyBytes_FromString(*pch);
if (tmp == NULL) {
break;
}
status = PyList_Append(result, tmp);
Py_DECREF(tmp);
if (status) {
break;
}
}
}
}
return result;
}
static PyObject *
parse_h_addr_list(struct hostent *h)
{
char **pch;
PyObject *result = NULL;
result = PyList_New(0);
if (result) {
switch (h->h_addrtype) {
case AF_INET:
{
char tmpbuf[sizeof "255.255.255.255"];
for (pch = h->h_addr_list; *pch != NULL; pch++) {
if (gevent_append_addr(result, AF_INET, *pch, tmpbuf, sizeof(tmpbuf))) {
break;
}
}
break;
}
case AF_INET6:
{
char tmpbuf[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")];
for (pch = h->h_addr_list; *pch != NULL; pch++) {
if (gevent_append_addr(result, AF_INET6, *pch, tmpbuf, sizeof(tmpbuf))) {
break;
}
}
break;
}
default:
PyErr_SetString(get_socket_object(&_socket_error, "error"), "unsupported address family");
Py_DECREF(result);
result = NULL;
}
}
return result;
}
static int
gevent_make_sockaddr(char* hostp, int port, int flowinfo, int scope_id, struct sockaddr_in6* sa6) {
if ( ares_inet_pton(AF_INET, hostp, &((struct sockaddr_in*)sa6)->sin_addr.s_addr) > 0 ) {
((struct sockaddr_in*)sa6)->sin_family = AF_INET;
((struct sockaddr_in*)sa6)->sin_port = htons(port);
return sizeof(struct sockaddr_in);
}
else if ( ares_inet_pton(AF_INET6, hostp, &sa6->sin6_addr.s6_addr) > 0 ) {
sa6->sin6_family = AF_INET6;
sa6->sin6_port = htons(port);
sa6->sin6_flowinfo = flowinfo;
sa6->sin6_scope_id = scope_id;
return sizeof(struct sockaddr_in6);
}
return -1;
}
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