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netifaces.c
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netifaces.c
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#include <Python.h>
#ifndef WIN32
# include <sys/types.h>
# include <sys/socket.h>
# include <net/if.h>
# include <netdb.h>
# if HAVE_SOCKET_IOCTLS
# include <sys/ioctl.h>
# include <netinet/in.h>
# include <arpa/inet.h>
#if defined(__sun)
#include <unistd.h>
#include <stropts.h>
#include <sys/sockio.h>
#endif
# endif /* HAVE_SOCKET_IOCTLS */
/* For logical interfaces support we convert all names to same name prefixed with l */
#if HAVE_SIOCGLIFNUM
#define CNAME(x) l##x
#else
#define CNAME(x) x
#endif
#if HAVE_NET_IF_DL_H
# include <net/if_dl.h>
#endif
/* For the benefit of stupid platforms (Linux), include all the sockaddr
definitions we can lay our hands on. It can also be useful for the benefit
of another stupid platform (FreeBSD, see PR 152036). */
#include <netinet/in.h>
# if HAVE_NETASH_ASH_H
# include <netash/ash.h>
# endif
# if HAVE_NETATALK_AT_H
# include <netatalk/at.h>
# endif
# if HAVE_NETAX25_AX25_H
# include <netax25/ax25.h>
# endif
# if HAVE_NETECONET_EC_H
# include <neteconet/ec.h>
# endif
# if HAVE_NETIPX_IPX_H
# include <netipx/ipx.h>
# endif
# if HAVE_NETPACKET_PACKET_H
# include <netpacket/packet.h>
# endif
# if HAVE_NETROSE_ROSE_H
# include <netrose/rose.h>
# endif
# if HAVE_LINUX_IRDA_H
# include <linux/irda.h>
# endif
# if HAVE_LINUX_ATM_H
# include <linux/atm.h>
# endif
# if HAVE_LINUX_LLC_H
# include <linux/llc.h>
# endif
# if HAVE_LINUX_TIPC_H
# include <linux/tipc.h>
# endif
# if HAVE_LINUX_DN_H
# include <linux/dn.h>
# endif
/* Map address families to sizes of sockaddr structs */
static int af_to_len(int af)
{
switch (af) {
case AF_INET: return sizeof (struct sockaddr_in);
#if defined(AF_INET6) && HAVE_SOCKADDR_IN6
case AF_INET6: return sizeof (struct sockaddr_in6);
#endif
#if defined(AF_AX25) && HAVE_SOCKADDR_AX25
# if defined(AF_NETROM)
case AF_NETROM: /* I'm assuming this is carried over x25 */
# endif
case AF_AX25: return sizeof (struct sockaddr_ax25);
#endif
#if defined(AF_IPX) && HAVE_SOCKADDR_IPX
case AF_IPX: return sizeof (struct sockaddr_ipx);
#endif
#if defined(AF_APPLETALK) && HAVE_SOCKADDR_AT
case AF_APPLETALK: return sizeof (struct sockaddr_at);
#endif
#if defined(AF_ATMPVC) && HAVE_SOCKADDR_ATMPVC
case AF_ATMPVC: return sizeof (struct sockaddr_atmpvc);
#endif
#if defined(AF_ATMSVC) && HAVE_SOCKADDR_ATMSVC
case AF_ATMSVC: return sizeof (struct sockaddr_atmsvc);
#endif
#if defined(AF_X25) && HAVE_SOCKADDR_X25
case AF_X25: return sizeof (struct sockaddr_x25);
#endif
#if defined(AF_ROSE) && HAVE_SOCKADDR_ROSE
case AF_ROSE: return sizeof (struct sockaddr_rose);
#endif
#if defined(AF_DECnet) && HAVE_SOCKADDR_DN
case AF_DECnet: return sizeof (struct sockaddr_dn);
#endif
#if defined(AF_PACKET) && HAVE_SOCKADDR_LL
case AF_PACKET: return sizeof (struct sockaddr_ll);
#endif
#if defined(AF_ASH) && HAVE_SOCKADDR_ASH
case AF_ASH: return sizeof (struct sockaddr_ash);
#endif
#if defined(AF_ECONET) && HAVE_SOCKADDR_EC
case AF_ECONET: return sizeof (struct sockaddr_ec);
#endif
#if defined(AF_IRDA) && HAVE_SOCKADDR_IRDA
case AF_IRDA: return sizeof (struct sockaddr_irda);
#endif
}
return sizeof (struct sockaddr);
}
#if !HAVE_SOCKADDR_SA_LEN
#define SA_LEN(sa) af_to_len(sa->sa_family)
#if HAVE_SIOCGLIFNUM
#define SS_LEN(sa) af_to_len(sa->ss_family)
#else
#define SS_LEN(sa) SA_LEN(sa)
#endif
#else
#define SA_LEN(sa) sa->sa_len
#endif /* !HAVE_SOCKADDR_SA_LEN */
# if HAVE_GETIFADDRS
# include <ifaddrs.h>
# endif /* HAVE_GETIFADDRS */
# if !HAVE_GETIFADDRS && (!HAVE_SOCKET_IOCTLS || !HAVE_SIOCGIFCONF)
/* If the platform doesn't define, what we need, barf. If you're seeing this,
it means you need to write suitable code to retrieve interface information
on your system. */
# error You need to add code for your platform.
# endif
#else /* defined(WIN32) */
#define _WIN32_WINNT 0x0501
# include <winsock2.h>
# include <ws2tcpip.h>
# include <iphlpapi.h>
#endif /* defined(WIN32) */
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
/* On systems without AF_LINK (Windows, for instance), define it anyway, but
give it a crazy value. On Linux, which has AF_PACKET but not AF_LINK,
define AF_LINK as the latter instead. */
#ifndef AF_LINK
# ifdef AF_PACKET
# define AF_LINK AF_PACKET
# else
# define AF_LINK -1000
# endif
# define HAVE_AF_LINK 0
#else
# define HAVE_AF_LINK 1
#endif
#if !defined(WIN32)
#if !HAVE_GETNAMEINFO
#undef getnameinfo
#undef NI_NUMERICHOST
#define getnameinfo our_getnameinfo
#define NI_NUMERICHOST 1
/* A very simple getnameinfo() for platforms without */
static int
getnameinfo (const struct sockaddr *addr, int addr_len,
char *buffer, int buflen,
char *buf2, int buf2len,
int flags)
{
switch (addr->sa_family) {
case AF_INET:
{
const struct sockaddr_in *sin = (struct sockaddr_in *)addr;
const unsigned char *bytes = (unsigned char *)&sin->sin_addr.s_addr;
char tmpbuf[20];
sprintf (tmpbuf, "%d.%d.%d.%d",
bytes[0], bytes[1], bytes[2], bytes[3]);
strncpy (buffer, tmpbuf, buflen);
}
break;
#ifdef AF_INET6
case AF_INET6:
{
const struct sockaddr_in6 *sin = (const struct sockaddr_in6 *)addr;
const unsigned char *bytes = sin->sin6_addr.s6_addr;
int n;
char tmpbuf[80], *ptr = tmpbuf;
int done_double_colon = FALSE;
int colon_mode = FALSE;
for (n = 0; n < 8; ++n) {
unsigned char b1 = bytes[2 * n];
unsigned char b2 = bytes[2 * n + 1];
if (b1) {
if (colon_mode) {
colon_mode = FALSE;
*ptr++ = ':';
}
sprintf (ptr, "%x%02x", b1, b2);
ptr += strlen (ptr);
*ptr++ = ':';
} else if (b2) {
if (colon_mode) {
colon_mode = FALSE;
*ptr++ = ':';
}
sprintf (ptr, "%x", b2);
ptr += strlen (ptr);
*ptr++ = ':';
} else {
if (!colon_mode) {
if (done_double_colon) {
*ptr++ = '0';
*ptr++ = ':';
} else {
if (n == 0)
*ptr++ = ':';
colon_mode = TRUE;
done_double_colon = TRUE;
}
}
}
}
if (colon_mode) {
colon_mode = FALSE;
*ptr++ = ':';
*ptr++ = '\0';
} else {
*--ptr = '\0';
}
strncpy (buffer, tmpbuf, buflen);
}
break;
#endif /* AF_INET6 */
default:
return -1;
}
return 0;
}
#endif
static int
string_from_sockaddr (struct sockaddr *addr,
char *buffer,
int buflen)
{
struct sockaddr* bigaddr = 0;
int failure;
struct sockaddr* gniaddr;
socklen_t gnilen;
if (!addr || addr->sa_family == AF_UNSPEC)
return -1;
if (SA_LEN(addr) < af_to_len(addr->sa_family)) {
/* Someteims ifa_netmask can be truncated. So let's detruncate it. FreeBSD
* PR: kern/152036: getifaddrs(3) returns truncated sockaddrs for netmasks
* -- http://www.freebsd.org/cgi/query-pr.cgi?pr=152036 */
gnilen = af_to_len(addr->sa_family);
bigaddr = calloc(1, gnilen);
if (!bigaddr)
return -1;
memcpy(bigaddr, addr, SA_LEN(addr));
#if HAVE_SOCKADDR_SA_LEN
bigaddr->sa_len = gnilen;
#endif
gniaddr = bigaddr;
} else {
gnilen = SA_LEN(addr);
gniaddr = addr;
}
failure = getnameinfo (gniaddr, gnilen,
buffer, buflen,
NULL, 0,
NI_NUMERICHOST);
if (bigaddr) {
free(bigaddr);
bigaddr = 0;
}
if (failure) {
size_t n, len;
char *ptr;
const char *data;
len = SA_LEN(addr);
#if HAVE_AF_LINK
/* BSD-like systems have AF_LINK */
if (addr->sa_family == AF_LINK) {
struct sockaddr_dl *dladdr = (struct sockaddr_dl *)addr;
len = dladdr->sdl_alen;
data = LLADDR(dladdr);
} else {
#endif
#if defined(AF_PACKET)
/* Linux has AF_PACKET instead */
if (addr->sa_family == AF_PACKET) {
struct sockaddr_ll *lladdr = (struct sockaddr_ll *)addr;
len = lladdr->sll_halen;
data = (const char *)lladdr->sll_addr;
} else {
#endif
/* We don't know anything about this sockaddr, so just display
the entire data area in binary. */
len -= (sizeof (struct sockaddr) - sizeof (addr->sa_data));
data = addr->sa_data;
#if defined(AF_PACKET)
}
#endif
#if HAVE_AF_LINK
}
#endif
if (buflen < 3 * len)
return -1;
ptr = buffer;
buffer[0] = '\0';
for (n = 0; n < len; ++n) {
sprintf (ptr, "%02x:", data[n] & 0xff);
ptr += 3;
}
*--ptr = '\0';
}
if (!buffer[0])
return -1;
return 0;
}
#endif /* !defined(WIN32) */
#if defined(WIN32)
static int
compare_bits (const void *pva,
const void *pvb,
unsigned bits)
{
const unsigned char *pa = (const unsigned char *)pva;
const unsigned char *pb = (const unsigned char *)pvb;
unsigned char a, b;
static unsigned char masks[] = {
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
};
while (bits >= 8) {
a = *pa++;
b = *pb++;
if (a < b)
return -1;
else if (a > b)
return +1;
bits -= 8;
}
if (bits) {
a = *pa++ & masks[bits];
b = *pb++ & masks[bits];
if (a < b)
return -1;
else if (a > b)
return +1;
}
return 0;
}
#endif
static int
add_to_family (PyObject *result, int family, PyObject *dict)
{
if (!PyDict_Size (dict))
return TRUE;
PyObject *py_family = PyInt_FromLong (family);
PyObject *list = PyDict_GetItem (result, py_family);
if (!py_family) {
Py_DECREF (dict);
Py_XDECREF (list);
return FALSE;
}
if (!list) {
list = PyList_New (1);
if (!list) {
Py_DECREF (dict);
Py_DECREF (py_family);
return FALSE;
}
PyList_SET_ITEM (list, 0, dict);
PyDict_SetItem (result, py_family, list);
Py_DECREF (list);
} else {
PyList_Append (list, dict);
Py_DECREF (dict);
}
return TRUE;
}
static PyObject *
ifaddrs (PyObject *self, PyObject *args)
{
const char *ifname;
PyObject *result;
int found = FALSE;
#if defined(WIN32)
PIP_ADAPTER_ADDRESSES pAdapterAddresses = NULL, pInfo = NULL;
ULONG ulBufferLength = 0;
DWORD dwRet;
PIP_ADAPTER_UNICAST_ADDRESS pUniAddr;
#endif
if (!PyArg_ParseTuple (args, "s", &ifname))
return NULL;
result = PyDict_New ();
if (!result)
return NULL;
#if defined(WIN32)
/* First, retrieve the adapter information. We do this in a loop, in
case someone adds or removes adapters in the meantime. */
do {
dwRet = GetAdaptersAddresses (AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, NULL,
pAdapterAddresses, &ulBufferLength);
if (dwRet == ERROR_BUFFER_OVERFLOW) {
if (pAdapterAddresses)
free (pAdapterAddresses);
pAdapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc (ulBufferLength);
if (!pAdapterAddresses) {
Py_DECREF (result);
PyErr_SetString (PyExc_MemoryError, "Not enough memory");
return NULL;
}
}
} while (dwRet == ERROR_BUFFER_OVERFLOW);
/* If we failed, then fail in Python too */
if (dwRet != ERROR_SUCCESS && dwRet != ERROR_NO_DATA) {
Py_DECREF (result);
if (pAdapterAddresses)
free (pAdapterAddresses);
PyErr_SetString (PyExc_OSError,
"Unable to obtain adapter information.");
return NULL;
}
for (pInfo = pAdapterAddresses; pInfo; pInfo = pInfo->Next) {
char buffer[256];
if (strcmp (pInfo->AdapterName, ifname) != 0)
continue;
found = TRUE;
/* Do the physical address */
if (256 >= 3 * pInfo->PhysicalAddressLength) {
PyObject *hwaddr, *dict;
char *ptr = buffer;
unsigned n;
*ptr = '\0';
for (n = 0; n < pInfo->PhysicalAddressLength; ++n) {
sprintf (ptr, "%02x:", pInfo->PhysicalAddress[n] & 0xff);
ptr += 3;
}
*--ptr = '\0';
hwaddr = PyString_FromString (buffer);
dict = PyDict_New ();
if (!dict) {
Py_XDECREF (hwaddr);
Py_DECREF (result);
free (pAdapterAddresses);
return NULL;
}
PyDict_SetItemString (dict, "addr", hwaddr);
Py_DECREF (hwaddr);
if (!add_to_family (result, AF_LINK, dict)) {
Py_DECREF (result);
free (pAdapterAddresses);
return NULL;
}
}
for (pUniAddr = pInfo->FirstUnicastAddress;
pUniAddr;
pUniAddr = pUniAddr->Next) {
DWORD dwLen = sizeof (buffer);
INT iRet = WSAAddressToString (pUniAddr->Address.lpSockaddr,
pUniAddr->Address.iSockaddrLength,
NULL,
(LPTSTR)buffer,
&dwLen);
PyObject *addr;
PyObject *mask = NULL;
PyObject *bcast = NULL;
PIP_ADAPTER_PREFIX pPrefix;
short family = pUniAddr->Address.lpSockaddr->sa_family;
if (iRet)
continue;
addr = PyString_FromString (buffer);
/* Find the netmask, where possible */
if (family == AF_INET) {
struct sockaddr_in *pAddr
= (struct sockaddr_in *)pUniAddr->Address.lpSockaddr;
for (pPrefix = pInfo->FirstPrefix;
pPrefix;
pPrefix = pPrefix->Next) {
struct sockaddr_in *pPrefixAddr
= (struct sockaddr_in *)pPrefix->Address.lpSockaddr;
struct sockaddr_in maskAddr, bcastAddr;
unsigned toDo;
unsigned wholeBytes, remainingBits;
unsigned char *pMaskBits, *pBcastBits;
if (pPrefixAddr->sin_family != AF_INET)
continue;
if (compare_bits (&pPrefixAddr->sin_addr,
&pAddr->sin_addr,
pPrefix->PrefixLength) != 0)
continue;
memcpy (&maskAddr,
pPrefix->Address.lpSockaddr,
sizeof (maskAddr));
memcpy (&bcastAddr,
pPrefix->Address.lpSockaddr,
sizeof (bcastAddr));
wholeBytes = pPrefix->PrefixLength >> 3;
remainingBits = pPrefix->PrefixLength & 7;
if (wholeBytes >= 4)
continue;
toDo = wholeBytes;
pMaskBits = (unsigned char *)&maskAddr.sin_addr;
while (toDo--)
*pMaskBits++ = 0xff;
toDo = 4 - wholeBytes;
pBcastBits = (unsigned char *)&bcastAddr.sin_addr + wholeBytes;
if (remainingBits) {
static const unsigned char masks[] = {
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
};
*pMaskBits++ = masks[remainingBits];
*pBcastBits &= masks[remainingBits];
*pBcastBits++ |= ~masks[remainingBits];
--toDo;
}
while (toDo--) {
*pMaskBits++ = 0;
*pBcastBits++ = 0xff;
}
dwLen = sizeof (buffer);
iRet = WSAAddressToString ((SOCKADDR *)&maskAddr,
sizeof (maskAddr),
NULL,
(LPTSTR)buffer,
&dwLen);
if (iRet == 0)
mask = PyString_FromString (buffer);
dwLen = sizeof (buffer);
iRet = WSAAddressToString ((SOCKADDR *)&bcastAddr,
sizeof (bcastAddr),
NULL,
(LPTSTR)buffer,
&dwLen);
if (iRet == 0)
bcast = PyString_FromString (buffer);
else
printf ("%d\n", iRet);
break;
}
} else if (family == AF_INET6) {
struct sockaddr_in6 *pAddr
= (struct sockaddr_in6 *)pUniAddr->Address.lpSockaddr;
for (pPrefix = pInfo->FirstPrefix;
pPrefix;
pPrefix = pPrefix->Next) {
struct sockaddr_in6 *pPrefixAddr
= (struct sockaddr_in6 *)pPrefix->Address.lpSockaddr;
struct sockaddr_in6 maskAddr, bcastAddr;
unsigned toDo;
unsigned wholeBytes, remainingBits;
unsigned char *pMaskBits, *pBcastBits;
if (pPrefixAddr->sin6_family != AF_INET6)
continue;
if (compare_bits (&pPrefixAddr->sin6_addr,
&pAddr->sin6_addr,
pPrefix->PrefixLength) != 0)
continue;
memcpy (&maskAddr,
pPrefix->Address.lpSockaddr,
sizeof (maskAddr));
memcpy (&bcastAddr,
pPrefix->Address.lpSockaddr,
sizeof (bcastAddr));
wholeBytes = pPrefix->PrefixLength >> 3;
remainingBits = pPrefix->PrefixLength & 7;
if (wholeBytes >= 8)
continue;
toDo = wholeBytes;
pMaskBits = (unsigned char *)&maskAddr.sin6_addr;
while (toDo--)
*pMaskBits++ = 0xff;
toDo = 8 - wholeBytes;
pBcastBits = (unsigned char *)&bcastAddr.sin6_addr + wholeBytes;
if (remainingBits) {
static const unsigned char masks[] = {
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
};
*pMaskBits++ = masks[remainingBits];
*pBcastBits &= masks[remainingBits];
*pBcastBits++ |= ~masks[remainingBits];
--toDo;
}
while (toDo--) {
*pMaskBits++ = 0;
*pBcastBits++ = 0xff;
}
dwLen = sizeof (buffer);
iRet = WSAAddressToString ((SOCKADDR *)&maskAddr,
sizeof (maskAddr),
NULL,
(LPTSTR)buffer,
&dwLen);
if (iRet == 0)
mask = PyString_FromString (buffer);
dwLen = sizeof (buffer);
iRet = WSAAddressToString ((SOCKADDR *)&bcastAddr,
sizeof (bcastAddr),
NULL,
(LPTSTR)buffer,
&dwLen);
if (iRet == 0)
bcast = PyString_FromString (buffer);
break;
}
}
PyObject *dict;
dict = PyDict_New ();
if (!dict) {
Py_XDECREF (addr);
Py_XDECREF (mask);
Py_XDECREF (bcast);
Py_DECREF (result);
free (pAdapterAddresses);
return NULL;
}
if (addr)
PyDict_SetItemString (dict, "addr", addr);
if (mask)
PyDict_SetItemString (dict, "netmask", mask);
if (bcast)
PyDict_SetItemString (dict, "broadcast", bcast);
Py_XDECREF (addr);
Py_XDECREF (mask);
Py_XDECREF (bcast);
if (!add_to_family (result, family, dict)) {
Py_DECREF (result);
free ((void *)pAdapterAddresses);
return NULL;
}
}
}
free ((void *)pAdapterAddresses);
#elif HAVE_GETIFADDRS
struct ifaddrs *addrs = NULL;
struct ifaddrs *addr = NULL;
if (getifaddrs (&addrs) < 0) {
Py_DECREF (result);
PyErr_SetFromErrno (PyExc_OSError);
return NULL;
}
for (addr = addrs; addr; addr = addr->ifa_next) {
char buffer[256];
PyObject *pyaddr = NULL, *netmask = NULL, *braddr = NULL;
if (strcmp (addr->ifa_name, ifname) != 0)
continue;
/* We mark the interface as found, even if there are no addresses;
this results in sensible behaviour for these few cases. */
found = TRUE;
/* Sometimes there are records without addresses (e.g. in the case of a
dial-up connection via ppp, which on Linux can have a link address
record with no actual address). We skip these as they aren't useful.
Thanks to Christian Kauhaus for reporting this issue. */
if (!addr->ifa_addr)
continue;
if (string_from_sockaddr (addr->ifa_addr, buffer, sizeof (buffer)) == 0)
pyaddr = PyString_FromString (buffer);
if (string_from_sockaddr (addr->ifa_netmask, buffer, sizeof (buffer)) == 0)
netmask = PyString_FromString (buffer);
if (string_from_sockaddr (addr->ifa_broadaddr, buffer, sizeof (buffer)) == 0)
braddr = PyString_FromString (buffer);
PyObject *dict = PyDict_New();
if (!dict) {
Py_XDECREF (pyaddr);
Py_XDECREF (netmask);
Py_XDECREF (braddr);
Py_DECREF (result);
freeifaddrs (addrs);
return NULL;
}
if (pyaddr)
PyDict_SetItemString (dict, "addr", pyaddr);
if (netmask)
PyDict_SetItemString (dict, "netmask", netmask);
if (braddr) {
if (addr->ifa_flags & (IFF_POINTOPOINT | IFF_LOOPBACK))
PyDict_SetItemString (dict, "peer", braddr);
else
PyDict_SetItemString (dict, "broadcast", braddr);
}
Py_XDECREF (pyaddr);
Py_XDECREF (netmask);
Py_XDECREF (braddr);
if (!add_to_family (result, addr->ifa_addr->sa_family, dict)) {
Py_DECREF (result);
freeifaddrs (addrs);
return NULL;
}
}
freeifaddrs (addrs);
#elif HAVE_SOCKET_IOCTLS
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
Py_DECREF (result);
PyErr_SetFromErrno (PyExc_OSError);
return NULL;
}
struct CNAME(ifreq) ifr;
PyObject *addr = NULL, *netmask = NULL, *braddr = NULL, *dstaddr = NULL;
int is_p2p = FALSE;
char buffer[256];
strncpy (ifr.CNAME(ifr_name), ifname, IFNAMSIZ);
#if HAVE_SIOCGIFHWADDR
if (ioctl (sock, SIOCGIFHWADDR, &ifr) == 0) {
found = TRUE;
if (string_from_sockaddr ((struct sockaddr *)&ifr.CNAME(ifr_addr), buffer, sizeof (buffer)) == 0) {
PyObject *hwaddr = PyString_FromString (buffer);
PyObject *dict = PyDict_New ();
if (!hwaddr || !dict) {
Py_XDECREF (hwaddr);
Py_XDECREF (dict);
Py_XDECREF (result);
close (sock);
return NULL;
}
PyDict_SetItemString (dict, "addr", hwaddr);
Py_DECREF (hwaddr);
if (!add_to_family (result, AF_LINK, dict)) {
Py_DECREF (result);
close (sock);
return NULL;
}
}
}
#endif
#if HAVE_SIOCGIFADDR
#if HAVE_SIOCGLIFNUM
if (ioctl (sock, SIOCGLIFADDR, &ifr) == 0) {
#else
if (ioctl (sock, SIOCGIFADDR, &ifr) == 0) {
#endif
found = TRUE;
if (string_from_sockaddr ((struct sockaddr *)&ifr.CNAME(ifr_addr), buffer, sizeof (buffer)) == 0)
addr = PyString_FromString (buffer);
}
#endif
#if HAVE_SIOCGIFNETMASK
#if HAVE_SIOCGLIFNUM
if (ioctl (sock, SIOCGLIFNETMASK, &ifr) == 0) {
#else
if (ioctl (sock, SIOCGIFNETMASK, &ifr) == 0) {
#endif
found = TRUE;
if (string_from_sockaddr ((struct sockaddr *)&ifr.CNAME(ifr_addr), buffer, sizeof (buffer)) == 0)
netmask = PyString_FromString (buffer);
}
#endif
#if HAVE_SIOCGIFFLAGS
#if HAVE_SIOCGLIFNUM
if (ioctl (sock, SIOCGLIFFLAGS, &ifr) == 0) {
#else
if (ioctl (sock, SIOCGIFFLAGS, &ifr) == 0) {
#endif
found = TRUE;
if (ifr.CNAME(ifr_flags) & IFF_POINTOPOINT)
is_p2p = TRUE;
}
#endif
#if HAVE_SIOCGIFBRDADDR
#if HAVE_SIOCGLIFNUM
if (!is_p2p && ioctl (sock, SIOCGLIFBRDADDR, &ifr) == 0) {
#else
if (!is_p2p && ioctl (sock, SIOCGIFBRDADDR, &ifr) == 0) {
#endif
found = TRUE;
if (string_from_sockaddr ((struct sockaddr *)&ifr.CNAME(ifr_addr), buffer, sizeof (buffer)) == 0)
braddr = PyString_FromString (buffer);
}
#endif
#if HAVE_SIOCGIFDSTADDR
#if HAVE_SIOCGLIFNUM
if (is_p2p && ioctl (sock, SIOCGLIFBRDADDR, &ifr) == 0) {
#else
if (is_p2p && ioctl (sock, SIOCGIFBRDADDR, &ifr) == 0) {
#endif
found = TRUE;
if (string_from_sockaddr ((struct sockaddr *)&ifr.CNAME(ifr_addr), buffer, sizeof (buffer)) == 0)
dstaddr = PyString_FromString (buffer);
}
#endif
PyObject *dict = PyDict_New();
if (!dict) {
Py_XDECREF (addr);
Py_XDECREF (netmask);
Py_XDECREF (braddr);
Py_XDECREF (dstaddr);
Py_DECREF (result);
close (sock);
return NULL;
}
if (addr)
PyDict_SetItemString (dict, "addr", addr);
if (netmask)
PyDict_SetItemString (dict, "netmask", netmask);
if (braddr)
PyDict_SetItemString (dict, "broadcast", braddr);
if (dstaddr)
PyDict_SetItemString (dict, "peer", dstaddr);
Py_XDECREF (addr);
Py_XDECREF (netmask);
Py_XDECREF (braddr);
Py_XDECREF (dstaddr);
if (!add_to_family (result, AF_INET, dict)) {
Py_DECREF (result);
close (sock);
return NULL;
}
close (sock);
#endif /* HAVE_SOCKET_IOCTLS */
if (found)
return result;
else {
Py_DECREF (result);
PyErr_SetString (PyExc_ValueError,
"You must specify a valid interface name.");
return NULL;
}
}
static PyObject *
interfaces (PyObject *self)
{
PyObject *result;
#if defined(WIN32)
PIP_ADAPTER_ADDRESSES pAdapterAddresses = NULL, pInfo = NULL;
ULONG ulBufferLength = 0;
DWORD dwRet;
/* First, retrieve the adapter information */
do {
dwRet = GetAdaptersAddresses(AF_UNSPEC, 0, NULL,
pAdapterAddresses, &ulBufferLength);
if (dwRet == ERROR_BUFFER_OVERFLOW) {
if (pAdapterAddresses)
free (pAdapterAddresses);
pAdapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc (ulBufferLength);
if (!pAdapterAddresses) {
PyErr_SetString (PyExc_MemoryError, "Not enough memory");
return NULL;
}
}