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/* $Id$ */
/*
* Copyright (C)2003-2007 Benny Prijono <benny@prijono.org>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pj/config.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
/* PMIB_ICMP_EX is not declared in VC6, causing error.
* But EVC4, which also claims to be VC6, does have it!
*/
#if defined(_MSC_VER) && _MSC_VER==1200 && !defined(PJ_WIN32_WINCE)
# define PMIB_ICMP_EX void*
#endif
#include <Iphlpapi.h>
#include <pj/ip_helper.h>
#include <pj/assert.h>
#include <pj/errno.h>
#include <pj/string.h>
typedef DWORD (WINAPI *PFN_GetIpAddrTable)(PMIB_IPADDRTABLE pIpAddrTable,
PULONG pdwSize,
BOOL bOrder);
typedef DWORD (WINAPI *PFN_GetIpForwardTable)(PMIB_IPFORWARDTABLE pIpForwardTable,
PULONG pdwSize,
BOOL bOrder);
static HANDLE s_hDLL;
static PFN_GetIpAddrTable s_pfnGetIpAddrTable;
static PFN_GetIpForwardTable s_pfnGetIpForwardTable;
static void unload_iphlp_module(void)
{
FreeLibrary(s_hDLL);
s_hDLL = NULL;
s_pfnGetIpAddrTable = NULL;
s_pfnGetIpForwardTable = NULL;
}
static FARPROC GetIpHlpApiProc(pj_char_t *lpProcName)
{
if(NULL == s_hDLL) {
s_hDLL = LoadLibrary(PJ_T("IpHlpApi"));
if(NULL != s_hDLL) {
pj_atexit(&unload_iphlp_module);
}
}
if(NULL != s_hDLL)
return GetProcAddress(s_hDLL, lpProcName);
return NULL;
}
static DWORD MyGetIpAddrTable(PMIB_IPADDRTABLE pIpAddrTable,
PULONG pdwSize,
BOOL bOrder)
{
if(NULL == s_pfnGetIpAddrTable) {
s_pfnGetIpAddrTable = (PFN_GetIpAddrTable)
GetIpHlpApiProc(PJ_T("GetIpAddrTable"));
}
if(NULL != s_pfnGetIpAddrTable) {
return s_pfnGetIpAddrTable(pIpAddrTable, pdwSize, bOrder);
}
return ERROR_NOT_SUPPORTED;
}
static DWORD MyGetIpForwardTable(PMIB_IPFORWARDTABLE pIpForwardTable,
PULONG pdwSize,
BOOL bOrder)
{
if(NULL == s_pfnGetIpForwardTable) {
s_pfnGetIpForwardTable = (PFN_GetIpForwardTable)
GetIpHlpApiProc(PJ_T("GetIpForwardTable"));
}
if(NULL != s_pfnGetIpForwardTable) {
return s_pfnGetIpForwardTable(pIpForwardTable, pdwSize, bOrder);
}
return ERROR_NOT_SUPPORTED;
}
/*
* Enumerate the local IP interface currently active in the host.
*/
PJ_DEF(pj_status_t) pj_enum_ip_interface(unsigned *p_cnt,
pj_in_addr ifs[])
{
/* Provide enough buffer or otherwise it will fail with
* error 22 ("Not Enough Buffer") error.
*/
char ipTabBuff[1024];
MIB_IPADDRTABLE *pTab;
ULONG tabSize;
unsigned i, count;
DWORD rc = NO_ERROR;
PJ_ASSERT_RETURN(p_cnt && ifs, PJ_EINVAL);
pTab = (MIB_IPADDRTABLE*)ipTabBuff;
/* Get IP address table */
tabSize = sizeof(ipTabBuff);
rc = MyGetIpAddrTable(pTab, &tabSize, FALSE);
if (rc != NO_ERROR)
return PJ_RETURN_OS_ERROR(rc);
/* Reset result */
pj_bzero(ifs, sizeof(ifs[0]) * (*p_cnt));
/* Now fill out the entries */
count = (pTab->dwNumEntries < *p_cnt) ? pTab->dwNumEntries : *p_cnt;
*p_cnt = 0;
for (i=0; i<count; ++i) {
/* Some Windows returns 0.0.0.0! */
if (pTab->table[i].dwAddr == 0)
continue;
ifs[*p_cnt].s_addr = pTab->table[i].dwAddr;
(*p_cnt)++;
}
return PJ_SUCCESS;
}
/*
* Enumerate the IP routing table for this host.
*/
PJ_DEF(pj_status_t) pj_enum_ip_route(unsigned *p_cnt,
pj_ip_route_entry routes[])
{
char ipTabBuff[1024];
MIB_IPADDRTABLE *pIpTab;
char rtabBuff[1024];
MIB_IPFORWARDTABLE *prTab;
ULONG tabSize;
unsigned i, count;
DWORD rc = NO_ERROR;
PJ_ASSERT_RETURN(p_cnt && routes, PJ_EINVAL);
pIpTab = (MIB_IPADDRTABLE *)ipTabBuff;
prTab = (MIB_IPFORWARDTABLE *)rtabBuff;
/* First get IP address table */
tabSize = sizeof(ipTabBuff);
rc = MyGetIpAddrTable(pIpTab, &tabSize, FALSE);
if (rc != NO_ERROR)
return PJ_RETURN_OS_ERROR(rc);
/* Next get IP route table */
tabSize = sizeof(rtabBuff);
rc = MyGetIpForwardTable(prTab, &tabSize, 1);
if (rc != NO_ERROR)
return PJ_RETURN_OS_ERROR(rc);
/* Reset routes */
pj_bzero(routes, sizeof(routes[0]) * (*p_cnt));
/* Now fill out the route entries */
count = (prTab->dwNumEntries < *p_cnt) ? prTab->dwNumEntries : *p_cnt;
*p_cnt = 0;
for (i=0; i<count; ++i) {
unsigned j;
/* Find interface entry */
for (j=0; j<pIpTab->dwNumEntries; ++j) {
if (pIpTab->table[j].dwIndex == prTab->table[i].dwForwardIfIndex)
break;
}
if (j==pIpTab->dwNumEntries)
continue; /* Interface not found */
routes[*p_cnt].ipv4.if_addr.s_addr = pIpTab->table[j].dwAddr;
routes[*p_cnt].ipv4.dst_addr.s_addr = prTab->table[i].dwForwardDest;
routes[*p_cnt].ipv4.mask.s_addr = prTab->table[i].dwForwardMask;
(*p_cnt)++;
}
return PJ_SUCCESS;
}
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