| /* |
| * Copyright 2002-2008 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| #include <windows.h> |
| #include <winsock2.h> |
| #include <assert.h> |
| |
| #include "jni_util.h" |
| |
| #include "NetworkInterface.h" |
| |
| /* |
| * Windows 9x specific routines to enumerate network interfaces and the |
| * IP addresses bound to those interfaces. |
| * |
| * Windows 95 does not include IP helper library support by default. |
| * Additionally Windows 98 can have its IP helper library support |
| * trashed by certain IE installations. For these environments we |
| * combine information from the registry with the list of IP addresses |
| * obtained via SIO_GET_INTERFACE_LIST. |
| */ |
| |
| /* |
| * Header files are missing these |
| */ |
| #if !defined(SIO_GET_INTERFACE_LIST) |
| #define SIO_GET_INTERFACE_LIST _IOR('t', 127, u_long) |
| |
| struct in_addr6 { |
| u_char s6_addr[16]; |
| }; |
| |
| struct sockaddr_in6 { |
| short sin6_family; |
| u_short sin6_port; |
| u_long sin6_flowinfo; |
| struct in_addr6 sin6_addr; |
| }; |
| |
| typedef union sockaddr_gen{ |
| struct sockaddr Address; |
| struct sockaddr_in AddressIn; |
| struct sockaddr_in6 AddressIn6; |
| } sockaddr_gen; |
| |
| typedef struct _INTERFACE_INFO |
| { |
| u_long iiFlags; |
| sockaddr_gen iiAddress; |
| sockaddr_gen iiBroadcastAddress; |
| sockaddr_gen iiNetmask; |
| } INTERFACE_INFO; |
| |
| #define IFF_UP 0x00000001 |
| #endif |
| |
| |
| #define MAX_STR_LEN 256 |
| |
| |
| /* |
| * A network adapter (similiar to the netif structure except contains |
| * Windows 9x specific fields). |
| */ |
| typedef struct _adapter { |
| char *name; |
| char *displayName; |
| int index; |
| char *reg_key; |
| int is_wan_driver; |
| netaddr *addrs; |
| struct _adapter *next; |
| } adapter; |
| |
| |
| /* |
| * Cached adapter list. |
| */ |
| static CRITICAL_SECTION cacheLock; |
| static adapter *cachedAdapterList; |
| |
| /* |
| * Initialize cache |
| */ |
| void init_win9x() { |
| InitializeCriticalSection(&cacheLock); |
| } |
| |
| |
| /* |
| * Free adapter list and any addresses bound to the adpater. |
| */ |
| static void free_adapters(adapter *adapterP) { |
| adapter *curr = adapterP; |
| while (curr != NULL) { |
| if (curr->name != NULL) |
| free(curr->name); |
| |
| if (curr->displayName != NULL) |
| free(curr->displayName); |
| |
| if (curr->reg_key != NULL) |
| free(curr->reg_key); |
| |
| if (curr->addrs != NULL) |
| free_netaddr(curr->addrs); |
| |
| adapterP = adapterP->next; |
| free(curr); |
| curr = adapterP; |
| } |
| } |
| |
| |
| /* |
| * Returns the SIO_GET_INTERFACE_LIST output |
| */ |
| static int getInterfaceList(JNIEnv *env, INTERFACE_INFO *infoP, DWORD dwSize) { |
| SOCKET sock; |
| DWORD ret; |
| |
| /* create a socket and do the ioctl */ |
| sock = socket(AF_INET, SOCK_DGRAM, 0); |
| if (sock == INVALID_SOCKET) { |
| JNU_ThrowByName(env, "java/lang/Error", "socket failed"); |
| return -1; |
| } |
| ret = WSAIoctl(sock, SIO_GET_INTERFACE_LIST, NULL, 0, |
| infoP, dwSize, &dwSize, NULL, NULL); |
| closesocket(sock); |
| if (ret == SOCKET_ERROR) { |
| JNU_ThrowByName(env, "java/lang/Error", "WSAIoctl failed"); |
| return -1; |
| } |
| return dwSize; |
| } |
| |
| |
| /* |
| * Gross, ugly, and crude way of guessing if this is a WAN (dial-up) driver. |
| * Returns 1 if it's the normal PPCMAC VxD, otherwise 0. |
| */ |
| static int isWanDriver(char *driver) { |
| LONG ret; |
| HKEY hKey; |
| DWORD dwLen; |
| ULONG ulType; |
| char key[MAX_STR_LEN]; |
| char vxd[MAX_STR_LEN]; |
| |
| sprintf(key, "System\\CurrentControlSet\\Services\\Class\\%s", driver); |
| ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, (PHKEY)&hKey); |
| if (ret != ERROR_SUCCESS) { |
| return 0; |
| } |
| dwLen = sizeof(vxd); |
| ret = RegQueryValueEx(hKey, "DeviceVxDs", NULL, &ulType, |
| (LPBYTE)vxd, &dwLen); |
| RegCloseKey(hKey); |
| if (ret != ERROR_SUCCESS) { |
| return 0; |
| } |
| return (strcmp(vxd, "pppmac.vxd") == 0); |
| } |
| |
| /* |
| * Windows 9x routine to get the network adapters using the registry. |
| * We enumerate HKEY_LOCAL_MACHINE\Enum and iterate through the tree |
| * looking for devices of class "Net". As these devices may not have a |
| * unique name we assign them a generated name. |
| * |
| * Returns a list of adapters without IP addresses (addrs member is NULL). |
| */ |
| static int getAdapters(JNIEnv *env, adapter **adapterPP) |
| { |
| LONG ret; |
| HKEY enumKey; |
| DWORD dwLen; |
| DWORD dwEnumKeys; |
| DWORD enumIndex; |
| ULONG ulType; |
| int adapterCount = 0; |
| adapter *adapterP = NULL; |
| adapter *curr; |
| |
| /* |
| * Start at HKEY_LOCAL_MACHINE\Enum |
| */ |
| ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Enum", 0, KEY_READ, (PHKEY)&enumKey); |
| if (ret != ERROR_SUCCESS) { |
| return -1; |
| } |
| ret = RegQueryInfoKey(enumKey, NULL, NULL, NULL, &dwEnumKeys, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL); |
| if (ret != ERROR_SUCCESS) { |
| RegCloseKey(enumKey); |
| return -1; |
| } |
| |
| /* |
| * Iterate through the sub-keys (PCI, Root, ...) |
| */ |
| for(enumIndex = 0; enumIndex<dwEnumKeys; enumIndex++) { |
| TCHAR deviceType[MAX_STR_LEN]; |
| HKEY deviceKey; |
| DWORD deviceIndex; |
| DWORD dwDeviceKeys; |
| |
| dwLen = sizeof(deviceType); |
| ret = RegEnumKeyEx(enumKey, enumIndex, deviceType, &dwLen, NULL, NULL, NULL, NULL); |
| if (ret != ERROR_SUCCESS) { |
| /* ignore this tree */ |
| continue; |
| } |
| |
| ret = RegOpenKeyEx(enumKey, deviceType, 0, KEY_READ, (PHKEY)&deviceKey); |
| if (ret != ERROR_SUCCESS) { |
| /* ignore this tree */ |
| continue; |
| } |
| ret = RegQueryInfoKey(deviceKey, NULL, NULL, NULL, &dwDeviceKeys, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL); |
| if (ret != ERROR_SUCCESS) { |
| /* ignore this tree */ |
| RegCloseKey(deviceKey); |
| continue; |
| } |
| |
| /* |
| * Iterate through each of the sub-keys under PCI, Root, ... |
| */ |
| for (deviceIndex=0; deviceIndex<dwDeviceKeys; deviceIndex++) { |
| TCHAR name[MAX_STR_LEN]; |
| HKEY nameKey; |
| DWORD nameIndex; |
| DWORD dwNameKeys; |
| |
| dwLen = sizeof(name); |
| ret = RegEnumKeyEx(deviceKey, deviceIndex, name, &dwLen, NULL, NULL, NULL, NULL); |
| |
| if (ret != ERROR_SUCCESS) { |
| /* ignore this sub-tree */ |
| continue; |
| } |
| |
| ret = RegOpenKeyEx(deviceKey, name, 0, KEY_READ, (PHKEY)&nameKey); |
| if (ret != ERROR_SUCCESS) { |
| /* ignore this sub-tree */ |
| continue; |
| } |
| ret = RegQueryInfoKey(nameKey, NULL, NULL, NULL, &dwNameKeys, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL); |
| if (ret != ERROR_SUCCESS) { |
| RegCloseKey(nameKey); |
| /* ignore this sub-tree */ |
| continue; |
| } |
| |
| /* |
| * Finally iterate through the Enum\Root\Net level keys |
| */ |
| for (nameIndex=0; nameIndex<dwNameKeys; nameIndex++) { |
| TCHAR dev[MAX_STR_LEN]; |
| TCHAR cls[MAX_STR_LEN]; |
| HKEY clsKey; |
| |
| dwLen = sizeof(dev); |
| ret = RegEnumKeyEx(nameKey, nameIndex, dev, &dwLen, NULL, NULL, NULL, NULL); |
| if (ret != ERROR_SUCCESS) { |
| continue; |
| } |
| |
| ret = RegOpenKeyEx(nameKey, dev, 0, KEY_READ, (PHKEY)&clsKey); |
| if (ret == ERROR_SUCCESS) { |
| dwLen = sizeof(cls); |
| ret = RegQueryValueEx(clsKey, "Class", NULL, &ulType, |
| (LPBYTE)cls, &dwLen); |
| |
| if (ret == ERROR_SUCCESS) { |
| if (strcmp(cls, "Net") == 0) { |
| TCHAR deviceDesc[MAX_STR_LEN]; |
| |
| dwLen = sizeof(deviceDesc); |
| ret = RegQueryValueEx(clsKey, "DeviceDesc", NULL, &ulType, |
| (LPBYTE)deviceDesc, &dwLen); |
| |
| if (ret == ERROR_SUCCESS) { |
| char key_name[MAX_STR_LEN]; |
| char ps_name[8]; |
| char driver[MAX_STR_LEN]; |
| int wan_device; |
| |
| /* |
| * Generate a pseudo device name |
| */ |
| sprintf(ps_name, "net%d", adapterCount); |
| |
| /* |
| * Try to determine if this a WAN adapter. This is |
| * useful when we try to eliminate WAN adapters from |
| * the interface list when probing for DHCP info |
| */ |
| dwLen = sizeof(driver); |
| ret = RegQueryValueEx(clsKey, "Driver", NULL, |
| &ulType, (LPBYTE)driver, &dwLen); |
| if (ret == ERROR_SUCCESS) { |
| wan_device = isWanDriver(driver); |
| } else { |
| wan_device = 0; |
| } |
| |
| /* |
| * We have found a Net device. In order to get the |
| * static IP addresses we must note the key. |
| */ |
| sprintf(key_name, "Enum\\%s\\%s\\%s", deviceType, name, dev); |
| |
| /* |
| * Create the net adapter |
| */ |
| curr = (adapter *)calloc(1, sizeof(adapter)); |
| if (curr != NULL) { |
| curr->is_wan_driver = wan_device; |
| curr->name = (char *)malloc(strlen(ps_name) + 1); |
| if (curr->name) { |
| curr->displayName = (char *)malloc(strlen(deviceDesc) + 1); |
| if (curr->displayName) { |
| curr->reg_key = (char *)malloc(strlen(key_name)+1); |
| if (curr->reg_key == NULL) { |
| free(curr->displayName); |
| free(curr->name); |
| free(curr); |
| curr = NULL; |
| } |
| } else { |
| free(curr->name); |
| free(curr); |
| curr = NULL; |
| } |
| } else { |
| free(curr); |
| curr = NULL; |
| } |
| } |
| |
| /* At OutOfMemory occurred */ |
| if (curr == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_adapters(adapterP); |
| RegCloseKey(clsKey); |
| RegCloseKey(nameKey); |
| RegCloseKey(deviceKey); |
| RegCloseKey(enumKey); |
| return -1; |
| } |
| |
| /* index starts at 1 (not 0) */ |
| curr->index = ++adapterCount; |
| |
| strcpy(curr->name, ps_name); |
| strcpy(curr->displayName, deviceDesc); |
| strcpy(curr->reg_key, key_name); |
| |
| /* |
| * Put the adapter at the end of the list. |
| */ |
| if (adapterP == NULL) { |
| adapterP = curr; |
| } else { |
| adapter *tail = adapterP; |
| while (tail->next != NULL) { |
| tail = tail->next; |
| } |
| tail->next = curr; |
| } |
| } |
| } |
| } |
| } |
| RegCloseKey(clsKey); |
| } |
| RegCloseKey(nameKey); |
| } |
| RegCloseKey(deviceKey); |
| } |
| RegCloseKey(enumKey); |
| |
| /* |
| * Insert an entry for the loopback interface |
| */ |
| curr = (adapter *)calloc(1, sizeof(adapter)); |
| if (curr == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_adapters(adapterP); |
| return -1; |
| } |
| curr->index = ++adapterCount; |
| curr->name = _strdup("lo"); |
| curr->displayName = _strdup("TCP Loopback interface"); |
| curr->next = adapterP; |
| *adapterPP = curr; |
| |
| return adapterCount; |
| } |
| |
| /* |
| * Windows 9x routine to obtain any static addresses for a specified |
| * TCP/IP binding. |
| * |
| * We first open Enum\Network\${binding} and check that the driver |
| * is TCP/IP. If so we pick up the driver and check for any IP addresses |
| * in System\\CurrentControlSet\\Services\\Class\\${driver} |
| * |
| * Returns 0 if found, otherwise -1. |
| */ |
| static int getStaticAddressEntry(char *binding, char *addresses) { |
| LONG ret; |
| HKEY hKey; |
| char name[255]; |
| char desc[255]; |
| char driver[255]; |
| char ipaddr[255]; |
| DWORD dwName; |
| ULONG ulType; |
| |
| /* assume nothing will be returned */ |
| strcpy(addresses, ""); |
| |
| /* |
| * Open the binding and check that it's TCP/IP |
| */ |
| sprintf(name, "Enum\\Network\\%s", binding); |
| ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, name, 0, KEY_READ, (PHKEY)&hKey); |
| if (ret != ERROR_SUCCESS) { |
| return -1; |
| } |
| dwName = sizeof(desc); |
| ret = RegQueryValueEx(hKey, "DeviceDesc", NULL, &ulType, |
| (LPBYTE)desc, &dwName); |
| if (ret != ERROR_SUCCESS) { |
| RegCloseKey(hKey); |
| return -1; |
| } |
| if (strcmp(desc, "TCP/IP") != 0) { |
| /* ignore non-TCP/IP bindings */ |
| RegCloseKey(hKey); |
| return -1; |
| } |
| |
| /* |
| * Get the driver for this TCP/IP binding |
| */ |
| dwName = sizeof(driver); |
| ret = RegQueryValueEx(hKey, "Driver", NULL, &ulType, |
| (LPBYTE)driver, &dwName); |
| RegCloseKey(hKey); |
| if (ret != ERROR_SUCCESS) { |
| return -1; |
| } |
| |
| /* |
| * Finally check if there is an IPAddress value for this driver. |
| */ |
| sprintf(name, "System\\CurrentControlSet\\Services\\Class\\%s", driver); |
| ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, name, 0, KEY_READ, (PHKEY)&hKey); |
| if (ret != ERROR_SUCCESS) { |
| return -1; |
| } |
| dwName = sizeof(ipaddr); |
| ret = RegQueryValueEx(hKey, "IPAddress", NULL, &ulType, |
| (LPBYTE)ipaddr, &dwName); |
| RegCloseKey(hKey); |
| if (ret != ERROR_SUCCESS) { |
| return -1; |
| } |
| |
| /* Return the address(es) */ |
| strcpy( addresses, ipaddr ); |
| return 0; |
| } |
| |
| /* |
| * Windows 9x routine to enumerate the static IP addresses on a |
| * particular interface using the registry. |
| * |
| * Returns a count of the number of addresses found. |
| */ |
| static int getStaticAddresses(JNIEnv *env, char *reg_key, netaddr **netaddrPP) |
| { |
| LONG ret; |
| HKEY enumKey, bindingKey; |
| DWORD dwLen; |
| ULONG ulType; |
| char addresses[MAX_STR_LEN]; |
| unsigned long addr; /* IPv4 address */ |
| unsigned char byte; |
| netaddr *netaddrP, *curr; |
| int i, addrCount; |
| |
| /* |
| * Open the HKEY_LOCAL_MACHINE\Enum\%s\%s\%s key |
| */ |
| ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, reg_key, 0, KEY_READ, |
| (PHKEY)&enumKey); |
| if (ret != ERROR_SUCCESS) { |
| /* interface has been removed */ |
| *netaddrPP = NULL; |
| return 0; |
| } |
| |
| /* |
| * Iterate through each of the bindings to find any TCP/IP bindings |
| * and any static address assoicated with the binding. |
| */ |
| strcpy(addresses, ""); |
| addrCount = 0; |
| netaddrP = NULL; |
| |
| ret = RegOpenKeyEx(enumKey, "Bindings", 0, KEY_READ, (PHKEY)&bindingKey); |
| if (ret == ERROR_SUCCESS) { |
| DWORD dwBindingKeys; |
| DWORD dwBindingIndex; |
| |
| ret = RegQueryInfoKey(bindingKey, NULL, NULL, NULL, NULL, NULL, NULL, &dwBindingKeys, |
| NULL, NULL, NULL, NULL); |
| if (ret == ERROR_SUCCESS) { |
| TCHAR binding[MAX_STR_LEN]; |
| |
| dwBindingIndex=0; |
| while (dwBindingIndex<dwBindingKeys) { |
| dwLen = sizeof(binding); |
| ret = RegEnumValue(bindingKey, dwBindingIndex, binding, &dwLen, |
| NULL, &ulType, NULL, NULL); |
| if (ret == ERROR_SUCCESS) { |
| if (getStaticAddressEntry(binding, addresses) == 0) { |
| /* |
| * On Windows 9x IP addresses are strings. Multi-homed hosts have |
| * the IP addresses seperated by commas. |
| */ |
| addr = 0; |
| byte = 0; |
| i = 0; |
| while ((DWORD)i < strlen(addresses)+1) { |
| /* eof or seperator */ |
| if (addresses[i] == ',' || addresses[i] == 0) { |
| if (addr != 0) { |
| addr = (addr << 8) | byte; |
| |
| curr = (netaddr *)malloc(sizeof(netaddr)); |
| if (curr == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_netaddr(netaddrP); |
| RegCloseKey(enumKey); |
| return -1; |
| } |
| curr->addr.him4.sin_family = AF_INET; |
| curr->addr.him4.sin_addr.s_addr = htonl(addr); |
| curr->next = netaddrP; |
| |
| netaddrP = curr; |
| addrCount++; |
| |
| /* reset the address for the next iteration */ |
| addr = 0; |
| } |
| byte = 0; |
| } else { |
| if (addresses[i] == '.') { |
| addr = (addr << 8) | byte; |
| byte = 0; |
| } else { |
| byte = (byte * 10) + (addresses[i] - '0'); |
| } |
| } |
| i++; |
| } |
| } |
| } |
| if (addrCount > 0) { |
| break; |
| } |
| dwBindingIndex++; |
| } |
| } |
| RegCloseKey(bindingKey); |
| } |
| |
| /* close the registry */ |
| RegCloseKey(enumKey); |
| |
| |
| /* return the list */ |
| *netaddrPP = netaddrP; |
| return addrCount; |
| } |
| |
| /* |
| * Windows 9x routine to probe the registry for a DHCP allocated address. |
| * This routine is only useful if we know that only one interface has its |
| * address allocated using DHCP. Returns 0.0.0.0 if none or multiple |
| * addresses found.0 |
| */ |
| static DWORD getDHCPAddress() |
| { |
| LONG ret; |
| HKEY hKey; |
| DWORD dwLen; |
| ULONG ulType; |
| char key[MAX_STR_LEN]; |
| int index; |
| DWORD dhcp_addr = 0; |
| |
| index = 0; |
| while (index < 99) { |
| DWORD addr; |
| |
| sprintf(key, "SYSTEM\\CurrentControlSet\\Services\\VxD\\DHCP\\DhcpInfo%02d", index); |
| |
| ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, (PHKEY)&hKey); |
| if (ret != ERROR_SUCCESS) { |
| return dhcp_addr; |
| } |
| |
| /* |
| * On Windows 9x the DHCP address is in the DhcpIPAddress key. We |
| * are assuming here that this is Windows Socket 2. If Windows |
| * Sockets is the original 1.1 release then this doesn't work because |
| * the IP address if in the DhcpInfo key (a blob with the first 4 |
| * bytes set to the IP address). |
| */ |
| dwLen = sizeof(addr); |
| ret = RegQueryValueEx(hKey, "DhcpIPAddress", NULL, &ulType, |
| (LPBYTE)&addr, &dwLen); |
| RegCloseKey(hKey); |
| |
| if (ret == ERROR_SUCCESS) { |
| if (addr) { |
| /* more than 1 DHCP address in registry */ |
| if (dhcp_addr) { |
| return 0; |
| } |
| dhcp_addr = htonl(addr); |
| } |
| } |
| index++; |
| } |
| |
| /* if we get here it means we've examined 100 registry entries */ |
| return 0; |
| } |
| |
| |
| /* |
| * Attempt to allocate the remaining addresses on addrList to the adpaters |
| * on adapterList. Returns the number of address remaining. |
| */ |
| int allocateRemaining(adapter *adapterList, int address_count, netaddr *addrList) { |
| adapter *adapterP = adapterList; |
| adapter *nobindingsP = NULL; |
| |
| /* |
| * If all addresses have been assigned there's nothing to do. |
| */ |
| if (address_count == 0) { |
| return 0; |
| } |
| |
| /* |
| * Determine if there is only one adapter without an address |
| */ |
| while (adapterP != NULL) { |
| if (adapterP->addrs == NULL) { |
| if (nobindingsP == NULL) { |
| nobindingsP = adapterP; |
| } else { |
| nobindingsP = NULL; |
| break; |
| } |
| } |
| adapterP = adapterP->next; |
| } |
| |
| /* |
| * Found (only one) |
| */ |
| if (nobindingsP) { |
| nobindingsP->addrs = addrList; |
| address_count = 0; |
| } |
| |
| return address_count; |
| } |
| |
| |
| /* |
| * 1. Network adapters are enumerated by traversing through the |
| * HKEY_LOCAL_MACHINE\Enum tree and picking out class "Net" devices. |
| * |
| * 2. Address enumeration starts with the list of IP addresses returned |
| * by SIO_GET_INTERFACE_LIST and then we "allocate" the addresses to |
| * the network adapters enumerated in step 1. Allocation works as |
| * follows :- |
| * |
| * i. Loopback address is assigned to the loopback interface. If there |
| * is one network adapter then all other addresses must be bound |
| * to that adapter. |
| * |
| * ii. Enumerate all static IP addresses using the registry. This allows |
| * us to allocate all static IP address to the corresponding adapter. |
| * |
| * iii. After step ii. if there is one network adapter that has not been |
| * allocated an IP address then we know that the remaining IP addresses |
| * must be bound to this adapter. |
| * |
| * iv. If we get to this step it means we are dealing with a complex |
| * configuration whereby multiple network adapters have their address |
| * configured dynamically (eg: NIC using DHCP plus modem using PPP). |
| * We employ a gross hack based on a crude determination done in step 1. |
| * If there is a DHCP address configured and if one remaining |
| * network adapter that is not a WAN adapter then the DHCP address |
| * must be bound to it. |
| */ |
| static adapter *loadConfig(JNIEnv *env) { |
| adapter *adapterList; |
| int adapter_count; |
| INTERFACE_INFO interfaceInfo[8]; |
| DWORD dwSize; |
| int address_count, i; |
| netaddr *addrList; |
| |
| /* |
| * Enumerate the network adapters |
| */ |
| adapter_count = getAdapters(env, &adapterList); |
| if (adapter_count < 0) { |
| return NULL; |
| } |
| /* minimum of loopback interface */ |
| assert(adapter_count >= 1); |
| |
| /* |
| * Enumerate all IP addresses as known to winsock |
| */ |
| dwSize = getInterfaceList(env, interfaceInfo, sizeof(interfaceInfo)); |
| if (dwSize < 0) { |
| free_adapters(adapterList); |
| return NULL; |
| } |
| address_count = dwSize/sizeof(INTERFACE_INFO); |
| |
| /* minimum of loopback address */ |
| assert(address_count >= 1); |
| |
| /* |
| * Create an address list (addrList) from the INTERFACE_INFO |
| * structure. |
| */ |
| addrList = NULL; |
| for (i=0; i<address_count; i++) { |
| netaddr *addrP = (netaddr *)calloc(1, sizeof(netaddr)); |
| if (addrP == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_netaddr(addrList); |
| free(adapterList); |
| return NULL; |
| } |
| |
| addrP->addr.him4.sin_family = AF_INET; |
| addrP->addr.him4.sin_addr.s_addr = |
| ((SOCKADDR_IN *)&(interfaceInfo[i].iiAddress))->sin_addr.S_un.S_addr; |
| |
| addrP->next = addrList; |
| addrList = addrP; |
| } |
| |
| |
| /* |
| * First we assign the loopback address to the lo adapter. |
| * If lo is the only adapter then we are done. |
| */ |
| { |
| adapter *loopbackAdapter; |
| netaddr *addrP, *prevP; |
| |
| /* find the loopback adapter */ |
| loopbackAdapter = adapterList; |
| while (strcmp(loopbackAdapter->name, "lo") != 0) { |
| loopbackAdapter = loopbackAdapter->next; |
| } |
| assert(loopbackAdapter != NULL); |
| |
| /* find the loopback address and move it to the loopback adapter */ |
| addrP = addrList; |
| prevP = NULL; |
| while (addrP != NULL) { |
| if (addrP->addr.him4.sin_addr.s_addr == htonl(0x7f000001)) { |
| loopbackAdapter->addrs = addrP; |
| if (prevP == NULL) { |
| addrList = addrP->next; |
| } else { |
| prevP->next = addrP->next; |
| } |
| loopbackAdapter->addrs->next = NULL; |
| address_count--; |
| break; |
| } |
| prevP = addrP; |
| addrP = addrP->next; |
| } |
| } |
| |
| |
| /* |
| * Special case. If there's only one network adapter then all remaining |
| * IP addresses must be bound to that adapter. |
| */ |
| address_count = allocateRemaining(adapterList, address_count, addrList); |
| if (address_count == 0) { |
| return adapterList; |
| } |
| |
| /* |
| * Locate any static IP addresses defined in the registry. Validate the |
| * addresses against the SIO_GET_INTERFACE_LIST (as registry may have |
| * stale settings). If valid we move the addresses from addrList to |
| * the adapter. |
| */ |
| { |
| adapter *adapterP; |
| |
| adapterP = adapterList; |
| while (adapterP != NULL) { |
| int cnt; |
| netaddr *static_addrP; |
| |
| /* |
| * Skip loopback |
| */ |
| if (strcmp(adapterP->name, "lo") == 0) { |
| adapterP = adapterP->next; |
| continue; |
| } |
| |
| /* |
| * Get the static addresses for this adapter. |
| */ |
| cnt = getStaticAddresses(env, adapterP->reg_key, &static_addrP); |
| if (cnt < 0) { |
| free_netaddr(addrList); |
| free(adapterList); |
| return NULL; |
| } |
| |
| /* |
| * Validate against the SIO_GET_INTERFACE_LIST. |
| * (avoids stale registry settings). |
| */ |
| while (static_addrP != NULL) { |
| netaddr *addrP = addrList; |
| netaddr *prev = NULL; |
| |
| while (addrP != NULL) { |
| if (addrP->addr.him4.sin_addr.s_addr == static_addrP->addr.him4.sin_addr.s_addr) |
| break; |
| |
| prev = addrP; |
| addrP = addrP->next; |
| } |
| |
| /* |
| * if addrP is not NULL it means we have a match |
| * (ie: address from the registry is valid). |
| */ |
| if (addrP != NULL) { |
| /* remove from addrList */ |
| if (prev == NULL) { |
| addrList = addrP->next; |
| } else { |
| prev->next = addrP->next; |
| } |
| address_count--; |
| |
| /* add to adapter list */ |
| addrP->next = adapterP->addrs; |
| adapterP->addrs = addrP; |
| } |
| |
| /* |
| * On the next static address. |
| */ |
| static_addrP = static_addrP->next; |
| } |
| |
| /* not needed */ |
| free_netaddr(static_addrP); |
| |
| adapterP = adapterP->next; |
| } |
| } |
| |
| |
| /* |
| * Static addresses are now assigned so try again to allocate the |
| * remaining addresses. This will succeed if there is one adapter |
| * with a dynamically assigned address (DHCP or PPP). |
| */ |
| address_count = allocateRemaining(adapterList, address_count, addrList); |
| if (address_count == 0) { |
| return adapterList; |
| } |
| |
| /* |
| * Next we see if there is a DHCP address in the registry. If there is |
| * an address (and it's valid) then we know it must be bound to a LAN |
| * adapter. Additionally, when we enumerate the network adapters |
| * we made a crude determination on if an adapter is dial-up. Thus if |
| * we know there is one remaining LAN adapter without an IP address |
| * then the DHCP address must be bound to it. |
| */ |
| { |
| long dhcp_addr = getDHCPAddress(); /* returns in network order */ |
| if (dhcp_addr) { |
| netaddr *addrP, *prevP; |
| |
| /* |
| * Check that the DHCP address is valid |
| */ |
| addrP = addrList; |
| prevP = NULL; |
| while (addrP != NULL) { |
| if (addrP->addr.him4.sin_addr.s_addr == dhcp_addr) { |
| break; |
| } |
| prevP = addrP; |
| addrP = addrP->next; |
| } |
| |
| /* |
| * Address is valid - now check how many non-WAN adapters |
| * don't have addresses yet. |
| */ |
| if (addrP != NULL) { |
| adapter *adapterP = adapterList; |
| adapter *nobindingsP = NULL; |
| |
| while (adapterP != NULL) { |
| if (adapterP->addrs == NULL && !adapterP->is_wan_driver) { |
| if (nobindingsP == NULL) { |
| nobindingsP = adapterP; |
| } else { |
| /* already found one */ |
| nobindingsP = NULL; |
| break; |
| } |
| } |
| adapterP = adapterP->next; |
| } |
| |
| /* |
| * One non-WAN adapter remaining |
| */ |
| if (nobindingsP != NULL) { |
| nobindingsP->addrs = addrP; |
| |
| /* remove from addrList */ |
| if (prevP == NULL) { |
| addrList = addrP->next; |
| } else { |
| prevP->next = addrP->next; |
| } |
| addrP->next = NULL; |
| address_count--; |
| } |
| } |
| } |
| } |
| |
| /* |
| * Finally we do one final attempt to re-assign any remaining |
| * addresses. This catches the case of 2 adapters that have their |
| * addresses dynamically assigned (specifically NIC with DHCP, and |
| * Modem using RAS/PPP). |
| */ |
| address_count = allocateRemaining(adapterList, address_count, addrList); |
| if (address_count == 0) { |
| return adapterList; |
| } |
| |
| /* |
| * Free any unallocated addresses |
| */ |
| if (address_count > 0) { |
| free_netaddr(addrList); |
| } |
| |
| /* |
| * Return the adapter List. |
| */ |
| return adapterList; |
| |
| } |
| |
| |
| /* |
| * Enumerate network interfaces. If successful returns the number of |
| * network interfaces and netifPP returning a list of netif structures. |
| * Returns -1 with exception thrown if error. |
| */ |
| int enumInterfaces_win9x(JNIEnv *env, netif **netifPP) { |
| adapter *adapters, *adapterP; |
| int cnt = 0; |
| netif *netifP = NULL; |
| |
| /* enumerate network configuration */ |
| adapters = loadConfig(env); |
| if (adapters == NULL) { |
| return -1; |
| } |
| |
| /* |
| * loadConfig returns an adapter list - we need to create a corresponding |
| * list of netif structures. |
| */ |
| adapterP = adapters; |
| while (adapterP != NULL) { |
| netif *ifs = (netif *)calloc(1, sizeof(netif)); |
| |
| if (ifs == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_adapters(adapters); |
| free_netif(netifP); |
| return -1; |
| } |
| |
| ifs->name = _strdup(adapterP->name); |
| ifs->displayName = _strdup(adapterP->displayName); |
| ifs->dwIndex = adapterP->index; |
| ifs->index = adapterP->index; |
| ifs->next = netifP; |
| netifP = ifs; |
| |
| if (ifs->name == NULL || ifs->displayName == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_adapters(adapters); |
| free_netif(netifP); |
| return -1; |
| } |
| |
| cnt++; |
| adapterP = adapterP->next; |
| } |
| |
| /* |
| * Put the adapter list in the cache |
| */ |
| EnterCriticalSection(&cacheLock); |
| { |
| if (cachedAdapterList != NULL) { |
| free_adapters(cachedAdapterList); |
| } |
| cachedAdapterList = adapters; |
| } |
| LeaveCriticalSection(&cacheLock); |
| |
| /* |
| * Return the netif list |
| */ |
| *netifPP = netifP; |
| return cnt; |
| } |
| |
| /* |
| * Enumerate the addresses for the specified network interface. If successful |
| * returns the number of addresses bound to the interface and sets netaddrPP |
| * to be a list of netaddr structures. Returns -1 if error. |
| */ |
| int enumAddresses_win9x(JNIEnv *env, netif *netifP, netaddr **netaddrPP) { |
| |
| EnterCriticalSection(&cacheLock); |
| { |
| adapter *adapterP = cachedAdapterList; |
| while (adapterP != NULL) { |
| if (strcmp(adapterP->name, netifP->name) == 0) { |
| |
| netaddr *newlist = NULL; |
| netaddr *curr = adapterP->addrs; |
| int cnt = 0; |
| |
| while (curr != NULL) { |
| /* |
| * Clone the netaddr and add it to newlist. |
| */ |
| netaddr *tmp = (netaddr *)calloc(1, sizeof(netaddr)); |
| if (tmp == NULL) { |
| LeaveCriticalSection(&cacheLock); |
| JNU_ThrowOutOfMemoryError(env, "heap allocation failure"); |
| free_netaddr(newlist); |
| return -1; |
| } |
| tmp->addr = curr->addr; |
| tmp->next = newlist; |
| newlist = tmp; |
| |
| cnt++; |
| curr = curr->next; |
| } |
| |
| *netaddrPP = newlist; |
| LeaveCriticalSection(&cacheLock); |
| return cnt; |
| } |
| adapterP = adapterP->next; |
| } |
| } |
| LeaveCriticalSection(&cacheLock); |
| |
| *netaddrPP = NULL; |
| return 0; |
| } |
