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/* interface.c
* Utility functions to get infos from interfaces
*
* Copyright 2016, Dario Lombardo
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "interface.h"
#include <string.h>
#include <wsutil/inet_addr.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#include <iphlpapi.h>
#include <Ws2tcpip.h>
#endif
#define WORKING_BUFFER_SIZE 15000
#ifdef HAVE_GETIFADDRS
static GSList* local_interfaces_to_list_nix(void)
{
GSList *interfaces = NULL;
struct ifaddrs *ifap;
struct ifaddrs *ifa;
int family;
char ip[INET6_ADDRSTRLEN];
if (getifaddrs(&ifap)) {
goto end;
}
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
family = ifa->ifa_addr->sa_family;
memset(ip, 0x0, INET6_ADDRSTRLEN);
switch (family) {
case AF_INET:
{
struct sockaddr_in *addr4 = (struct sockaddr_in *)ifa->ifa_addr;
ws_inet_ntop4(&addr4->sin_addr, ip, sizeof(ip));
break;
}
case AF_INET6:
{
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)ifa->ifa_addr;
ws_inet_ntop6(&addr6->sin6_addr, ip, sizeof(ip));
break;
}
default:
break;
}
/* skip loopback addresses */
if (!g_strcmp0(ip, "127.0.0.1") || !g_strcmp0(ip, "::1"))
continue;
if (*ip) {
interfaces = g_slist_prepend(interfaces, g_strdup(ip));
}
}
freeifaddrs(ifap);
end:
return interfaces;
}
#endif /* HAVE_GETIFADDRS */
#ifdef _WIN32
static GSList* local_interfaces_to_list_win(void)
{
GSList *interfaces = NULL;
PIP_ADAPTER_ADDRESSES pAddresses = NULL;
ULONG outBufLen = WORKING_BUFFER_SIZE;
ULONG family = AF_UNSPEC;
PIP_ADAPTER_ADDRESSES pCurrAddresses = NULL;
PIP_ADAPTER_UNICAST_ADDRESS pUnicast = NULL;
char ip[100];
guint iplen = 100;
pAddresses = (IP_ADAPTER_ADDRESSES *)g_malloc0(outBufLen);
if (pAddresses == NULL)
return NULL;
if (GetAdaptersAddresses(family, 0, NULL, pAddresses, &outBufLen) != NO_ERROR)
goto end;
pCurrAddresses = pAddresses;
while (pCurrAddresses) {
for (pUnicast = pCurrAddresses->FirstUnicastAddress; pUnicast != NULL; pUnicast = pUnicast->Next) {
if (pUnicast->Address.lpSockaddr->sa_family == AF_INET) {
SOCKADDR_IN* sa_in = (SOCKADDR_IN *)pUnicast->Address.lpSockaddr;
ws_inet_ntop4(&(sa_in->sin_addr), ip, iplen);
if (!g_strcmp0(ip, "127.0.0.1"))
continue;
if (*ip)
interfaces = g_slist_prepend(interfaces, g_strdup(ip));
}
if (pUnicast->Address.lpSockaddr->sa_family == AF_INET6) {
SOCKADDR_IN6* sa_in6 = (SOCKADDR_IN6 *)pUnicast->Address.lpSockaddr;
ws_inet_ntop6(&(sa_in6->sin6_addr), ip, iplen);
if (!g_strcmp0(ip, "::1"))
continue;
if (*ip)
interfaces = g_slist_prepend(interfaces, g_strdup(ip));
}
}
pCurrAddresses = pCurrAddresses->Next;
}
end:
if (pAddresses)
g_free(pAddresses);
return interfaces;
}
#endif /* _WIN32 */
GSList* local_interfaces_to_list(void)
{
#if defined(_WIN32)
return local_interfaces_to_list_win();
#elif defined(HAVE_GETIFADDRS)
return local_interfaces_to_list_nix();
#else
return NULL;
#endif
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=4 tabstop=8 noexpandtab:
* :indentSize=4:tabSize=8:noTabs=false:
*/
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