| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 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 <winsock2.h> |
| |
| /* If you encounter error "Cannot open include file: 'Iphlpapi.h' here, |
| * you need to install newer Platform SDK. Presumably you're using |
| * Microsoft Visual Studio 6? |
| */ |
| #include <Iphlpapi.h> |
| |
| #include <pj/ip_helper.h> |
| #include <pj/assert.h> |
| #include <pj/errno.h> |
| #include <pj/string.h> |
| |
| /* Dealing with Unicode quirks: |
| |
| There seems to be a difference with GetProcAddress() API signature between |
| Windows (i.e. Win32) and Windows CE (e.g. Windows Mobile). On Windows, the |
| API is declared as: |
| |
| FARPROC GetProcAddress( |
| HMODULE hModule, |
| LPCSTR lpProcName); |
| |
| while on Windows CE: |
| |
| FARPROC GetProcAddress( |
| HMODULE hModule, |
| LPCWSTR lpProcName); |
| |
| Notice the difference with lpProcName argument type. This means that on |
| Windows, even on Unicode Windows, the lpProcName always takes ANSI format, |
| while on Windows CE, the argument follows the UNICODE setting. |
| |
| Because of this, we use a different Unicode treatment here than the usual |
| PJ_NATIVE_STRING_IS_UNICODE PJLIB setting (<pj/unicode.h>): |
| - GPA_TEXT macro: convert literal string to platform's native literal |
| string |
| - gpa_char: the platform native character type |
| |
| Note that "GPA" and "gpa" are abbreviations for GetProcAddress. |
| */ |
| #if defined(PJ_WIN32_WINCE) && PJ_WIN32_WINCE!=0 |
| /* on CE, follow the PJLIB Unicode setting */ |
| # define GPA_TEXT(x) PJ_T(x) |
| # define gpa_char pj_char_t |
| #else |
| /* on non-CE, always use ANSI format */ |
| # define GPA_TEXT(x) x |
| # define gpa_char char |
| #endif |
| |
| |
| typedef DWORD (WINAPI *PFN_GetIpAddrTable)(PMIB_IPADDRTABLE pIpAddrTable, |
| PULONG pdwSize, |
| BOOL bOrder); |
| typedef DWORD (WINAPI *PFN_GetAdapterAddresses)(ULONG Family, |
| ULONG Flags, |
| PVOID Reserved, |
| PIP_ADAPTER_ADDRESSES AdapterAddresses, |
| PULONG SizePointer); |
| typedef DWORD (WINAPI *PFN_GetIpForwardTable)(PMIB_IPFORWARDTABLE pIpForwardTable, |
| PULONG pdwSize, |
| BOOL bOrder); |
| typedef DWORD (WINAPI *PFN_GetIfEntry)(PMIB_IFROW pIfRow); |
| |
| static HANDLE s_hDLL; |
| static PFN_GetIpAddrTable s_pfnGetIpAddrTable; |
| static PFN_GetAdapterAddresses s_pfnGetAdapterAddresses; |
| static PFN_GetIpForwardTable s_pfnGetIpForwardTable; |
| static PFN_GetIfEntry s_pfnGetIfEntry; |
| |
| |
| static void unload_iphlp_module(void) |
| { |
| FreeLibrary(s_hDLL); |
| s_hDLL = NULL; |
| s_pfnGetIpAddrTable = NULL; |
| s_pfnGetIpForwardTable = NULL; |
| s_pfnGetIfEntry = NULL; |
| s_pfnGetAdapterAddresses = NULL; |
| } |
| |
| static FARPROC GetIpHlpApiProc(gpa_char *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(GPA_TEXT("GetIpAddrTable")); |
| } |
| |
| if(NULL != s_pfnGetIpAddrTable) { |
| return s_pfnGetIpAddrTable(pIpAddrTable, pdwSize, bOrder); |
| } |
| |
| return ERROR_NOT_SUPPORTED; |
| } |
| |
| static DWORD MyGetAdapterAddresses(ULONG Family, |
| ULONG Flags, |
| PVOID Reserved, |
| PIP_ADAPTER_ADDRESSES AdapterAddresses, |
| PULONG SizePointer) |
| { |
| if(NULL == s_pfnGetAdapterAddresses) { |
| s_pfnGetAdapterAddresses = (PFN_GetAdapterAddresses) |
| GetIpHlpApiProc(GPA_TEXT("GetAdaptersAddresses")); |
| } |
| |
| if(NULL != s_pfnGetAdapterAddresses) { |
| return s_pfnGetAdapterAddresses(Family, Flags, Reserved, |
| AdapterAddresses, SizePointer); |
| } |
| |
| return ERROR_NOT_SUPPORTED; |
| } |
| |
| #if PJ_IP_HELPER_IGNORE_LOOPBACK_IF |
| static DWORD MyGetIfEntry(MIB_IFROW *pIfRow) |
| { |
| if(NULL == s_pfnGetIfEntry) { |
| s_pfnGetIfEntry = (PFN_GetIfEntry) |
| GetIpHlpApiProc(GPA_TEXT("GetIfEntry")); |
| } |
| |
| if(NULL != s_pfnGetIfEntry) { |
| return s_pfnGetIfEntry(pIfRow); |
| } |
| |
| return ERROR_NOT_SUPPORTED; |
| } |
| #endif |
| |
| |
| static DWORD MyGetIpForwardTable(PMIB_IPFORWARDTABLE pIpForwardTable, |
| PULONG pdwSize, |
| BOOL bOrder) |
| { |
| if(NULL == s_pfnGetIpForwardTable) { |
| s_pfnGetIpForwardTable = (PFN_GetIpForwardTable) |
| GetIpHlpApiProc(GPA_TEXT("GetIpForwardTable")); |
| } |
| |
| if(NULL != s_pfnGetIpForwardTable) { |
| return s_pfnGetIpForwardTable(pIpForwardTable, pdwSize, bOrder); |
| } |
| |
| return ERROR_NOT_SUPPORTED; |
| } |
| |
| /* Enumerate local IP interface using GetIpAddrTable() |
| * for IPv4 addresses only. |
| */ |
| static pj_status_t enum_ipv4_interface(unsigned *p_cnt, |
| pj_sockaddr ifs[]) |
| { |
| char ipTabBuff[512]; |
| MIB_IPADDRTABLE *pTab = (MIB_IPADDRTABLE*)ipTabBuff; |
| ULONG tabSize = sizeof(ipTabBuff); |
| unsigned i, count; |
| DWORD rc = NO_ERROR; |
| |
| PJ_ASSERT_RETURN(p_cnt && ifs, PJ_EINVAL); |
| |
| /* Get IP address table */ |
| rc = MyGetIpAddrTable(pTab, &tabSize, FALSE); |
| if (rc != NO_ERROR) { |
| if (rc == ERROR_INSUFFICIENT_BUFFER) { |
| /* Retry with larger buffer */ |
| pTab = (MIB_IPADDRTABLE*)malloc(tabSize); |
| if (pTab) |
| rc = MyGetIpAddrTable(pTab, &tabSize, FALSE); |
| } |
| |
| if (rc != NO_ERROR) { |
| if (pTab != (MIB_IPADDRTABLE*)ipTabBuff) |
| free(pTab); |
| 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) { |
| MIB_IFROW ifRow; |
| |
| /* Ignore 0.0.0.0 address (interface is down?) */ |
| if (pTab->table[i].dwAddr == 0) |
| continue; |
| |
| /* Ignore 0.0.0.0/8 address. This is a special address |
| * which doesn't seem to have practical use. |
| */ |
| if ((pj_ntohl(pTab->table[i].dwAddr) >> 24) == 0) |
| continue; |
| |
| #if PJ_IP_HELPER_IGNORE_LOOPBACK_IF |
| /* Investigate the type of this interface */ |
| pj_bzero(&ifRow, sizeof(ifRow)); |
| ifRow.dwIndex = pTab->table[i].dwIndex; |
| if (MyGetIfEntry(&ifRow) != 0) |
| continue; |
| |
| if (ifRow.dwType == MIB_IF_TYPE_LOOPBACK) |
| continue; |
| #endif |
| |
| ifs[*p_cnt].ipv4.sin_family = PJ_AF_INET; |
| ifs[*p_cnt].ipv4.sin_addr.s_addr = pTab->table[i].dwAddr; |
| (*p_cnt)++; |
| } |
| |
| if (pTab != (MIB_IPADDRTABLE*)ipTabBuff) |
| free(pTab); |
| |
| return (*p_cnt) ? PJ_SUCCESS : PJ_ENOTFOUND; |
| } |
| |
| /* Enumerate local IP interface using GetAdapterAddresses(), |
| * which works for both IPv4 and IPv6. |
| */ |
| static pj_status_t enum_ipv4_ipv6_interface(int af, |
| unsigned *p_cnt, |
| pj_sockaddr ifs[]) |
| { |
| pj_uint8_t buffer[600]; |
| IP_ADAPTER_ADDRESSES *adapter = (IP_ADAPTER_ADDRESSES*)buffer; |
| void *adapterBuf = NULL; |
| ULONG size = sizeof(buffer); |
| ULONG flags; |
| unsigned i; |
| DWORD rc; |
| |
| flags = GAA_FLAG_SKIP_FRIENDLY_NAME | |
| GAA_FLAG_SKIP_DNS_SERVER | |
| GAA_FLAG_SKIP_MULTICAST; |
| |
| rc = MyGetAdapterAddresses(af, flags, NULL, adapter, &size); |
| if (rc != ERROR_SUCCESS) { |
| if (rc == ERROR_BUFFER_OVERFLOW) { |
| /* Retry with larger memory size */ |
| adapterBuf = malloc(size); |
| adapter = (IP_ADAPTER_ADDRESSES*) adapterBuf; |
| if (adapter != NULL) |
| rc = MyGetAdapterAddresses(af, flags, NULL, adapter, &size); |
| } |
| |
| if (rc != ERROR_SUCCESS) { |
| if (adapterBuf) |
| free(adapterBuf); |
| return PJ_RETURN_OS_ERROR(rc); |
| } |
| } |
| |
| /* Reset result */ |
| pj_bzero(ifs, sizeof(ifs[0]) * (*p_cnt)); |
| |
| /* Enumerate interface */ |
| for (i=0; i<*p_cnt && adapter; adapter = adapter->Next) { |
| if (adapter->FirstUnicastAddress) { |
| SOCKET_ADDRESS *pAddr = &adapter->FirstUnicastAddress->Address; |
| |
| /* Ignore address family which we didn't request, just in case */ |
| if (pAddr->lpSockaddr->sa_family != PJ_AF_INET && |
| pAddr->lpSockaddr->sa_family != PJ_AF_INET6) |
| { |
| continue; |
| } |
| |
| /* Apply some filtering to known IPv4 unusable addresses */ |
| if (pAddr->lpSockaddr->sa_family == PJ_AF_INET) { |
| const pj_sockaddr_in *addr_in = |
| (const pj_sockaddr_in*)pAddr->lpSockaddr; |
| |
| /* Ignore 0.0.0.0 address (interface is down?) */ |
| if (addr_in->sin_addr.s_addr == 0) |
| continue; |
| |
| /* Ignore 0.0.0.0/8 address. This is a special address |
| * which doesn't seem to have practical use. |
| */ |
| if ((pj_ntohl(addr_in->sin_addr.s_addr) >> 24) == 0) |
| continue; |
| } |
| |
| #if PJ_IP_HELPER_IGNORE_LOOPBACK_IF |
| /* Ignore loopback interfaces */ |
| /* This should have been IF_TYPE_SOFTWARE_LOOPBACK according to |
| * MSDN, and this macro should have been declared in Ipifcons.h, |
| * but some SDK versions don't have it. |
| */ |
| if (adapter->IfType == MIB_IF_TYPE_LOOPBACK) |
| continue; |
| #endif |
| |
| /* Ignore down interface */ |
| if (adapter->OperStatus != IfOperStatusUp) |
| continue; |
| |
| ifs[i].addr.sa_family = pAddr->lpSockaddr->sa_family; |
| pj_memcpy(&ifs[i], pAddr->lpSockaddr, pAddr->iSockaddrLength); |
| ++i; |
| } |
| } |
| |
| if (adapterBuf) |
| free(adapterBuf); |
| |
| *p_cnt = i; |
| return (*p_cnt) ? PJ_SUCCESS : PJ_ENOTFOUND; |
| } |
| |
| |
| /* |
| * Enumerate the local IP interface currently active in the host. |
| */ |
| PJ_DEF(pj_status_t) pj_enum_ip_interface(int af, |
| unsigned *p_cnt, |
| pj_sockaddr ifs[]) |
| { |
| pj_status_t status = -1; |
| |
| PJ_ASSERT_RETURN(p_cnt && ifs, PJ_EINVAL); |
| PJ_ASSERT_RETURN(af==PJ_AF_UNSPEC || af==PJ_AF_INET || af==PJ_AF_INET6, |
| PJ_EAFNOTSUP); |
| |
| status = enum_ipv4_ipv6_interface(af, p_cnt, ifs); |
| if (status != PJ_SUCCESS && (af==PJ_AF_INET || af==PJ_AF_UNSPEC)) |
| status = enum_ipv4_interface(p_cnt, ifs); |
| return status; |
| } |
| |
| /* |
| * 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; |
| } |
| |