Use API other than route command to add route entry for ipv4;

Refine the code;
List issues in the README.cygwin;

component/babeld/Makefile

@@ -64,7 +64,7 @@ clean:
 
 kernel.o: kernel_netlink.c kernel_socket.c kernel_cygwin.c
 
-# Usage: ./testc.exe
+# Usage: ./test.exe
 # Verify most of the functions in the cyginet.c
-testc.exe: cyginet.c
+test.exe: cyginet.c
 	$(CC) $(CFLAGS) $(LDFLAGS) -DTEST_CYGINET -o $@ $< $(LDLIBS)

component/babeld/README.cygwin

@@ -46,7 +46,97 @@ Control Panel -> Network Connections.
 
 You should see all the connections like "Local Area Connection
 3". Right click and rename this to something shorter and without
-embedded spaces such as "my-tap".
+embedded spaces such as "tap1".
+
+Or
+
+$ netsh interface set interface name = "Local Area Connection 3" newname="tap1"
+
+Test babeld in the Cygwin
+=========================
+
+We need 2 laptops, a wireless router, one laptop connects the router
+by wireless netcard, another is wired.
+
+Both of laptops install Openvpn for cygwin, enable ipv6 forwarding on
+each tap interface
+
+Laptop A:
+
+  lan            Disconnect
+
+  wlan           192.168.121.100/24
+                 2001::A1 (manual)
+
+  tap            ifindex = 11, ipv6 forwarding=enabled
+                 10.100.0.1/24          
+                 fe80::2ff:38ff:fed8:7d97  (auto link addr)
+                 
+Laptop B:
+
+  lan            192.168.121.21/24
+                 2001::B1 (manual)
+
+  tap            ifindex = 7, ipv6 forwarding=enabled
+                 10.200.0.1/24           
+                 fe80::2ff:17ff:fee4:8ed0 (auto link addr)
+
+Router R:
+       192.168.121.1/24
+
+
+In the laptop A, run the following command:
+
+# Start openvpn server
+$ cd C:/Program Files/OpenVPN/server 
+$ ../bin/openvpn.exe --config server.ovpn
+
+# Startup babeld
+$ babeld.exe -d 3 -h 15 -H 15 -s wlan tap
+
+# Assign ipv6 unicast address to interfaces
+# netsh interface ipv6 add address wlan 2001:A1
+# netsh interface ipv6 set interface tap forwarding=enabled
+
+In the laptop B, run the following command:
+
+# Start openvpn client
+$ cd C:/Program Files/OpenVPN/client 
+$ ../bin/openvpn.exe --config client.ovpn
+
+# Startup babeld
+$ babeld.exe -d 3 -h 15 -H 15 -s lan tap1
+
+# Assign ipv6 unicast address to interfaces
+# netsh interface ipv6 add address lan 2001:B1
+# netsh interface ipv6 set interface tap forwarding=enabled
+
+Then ping6 to each other , 
+
+In laptop A, 
+$ ping6 2001::B1
+
+In laptop B,
+$ ping6 2001::A1
+
+It should work.
+
+Check kernel route:
+$ netsh interface ipv6 show route
+
+Example output of A
+
+Publish  Type       Met  Prefix                    Idx  Gateway/Interface Name
+-------  --------  ----  ------------------------  ---  ---------------------
+no       Manual       0  ::/0                       11  fe80::2ff:17ff:fee4:8ed0
+
+
+Example output of B
+
+Publish  Type       Met  Prefix                    Idx  Gateway/Interface Name
+-------  --------  ----  ------------------------  ---  ---------------------
+no       Manual       0  ::/0                       7   fe80::2ff:38ff:fed8:7d97
+
 
 Notes
 =====
@@ -66,22 +156,31 @@ Notes
 5. Ipv6 option "IPV6_V6ONLY" only works in the Windows Vista later.
 
 6. If one connection is assigned more than one ipv4 address, babeld
-   returns the first one only, is it right? I'm not sure.
+   returns the first one only to check whether ipv4 address changed,
+   is it right? I'm not sure.
 
 7. Regarding IPV6CTL_FORWARDING and IPV6CTL_SENDREDIRECTS, MSDN says
-   that you can set both of options for Ipv4 in the registry:
-   "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters",
-   but says nothing for Ipv6. Does it work for ipv6 in the registry:
-   "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters"
-   ?
+   that you can set both of options in the registry:
+   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
+   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
+
+   IPEnableRouter, DWORD
+   EnableICMPRedirect, DWORD
+
+   Refers to:
+          http://support.microsoft.com/kb/315236/en-us
+          http://technet.microsoft.com/en-us/library/cc766102(v=ws.10).aspx
+          http://msdn.microsoft.com/en-us/library/aa915651.aspx
+
+   For Ipv6, FORWARDING is set per interface, not global setting.
 
 8. There is no RTM_BLACKHOLE, RTM_REJECT, NULLROUTE in the windows, in
    the kernel_cygwin.c!kernel_route, we only use local address as
    gateway in the BLACKHOLE route entry. Is it OK?
 
-   A: It's not OK actually. In the Windows, you can't use 127.0.0.1 as
-      gateway when add route entry. So the solution is find one
-      interface other than loopback interface, then use its
+   A: It's not OK actually for ipv4. In the Windows, you can't use
+      127.0.0.1 as gateway when add route entry. So the solution is
+      find one interface other than loopback interface, then use its
       uni-address as gateway, it will be a blackhole route entry. For
       example, if you have an interface which ip addr is
       192.168.128.100, and ifindex is 5, then
@@ -92,3 +191,8 @@ Notes
 
 9. IN6_LINKLOCAL_IFINDEX && SET_IN6_LINKLOCAL_IFINDEX, do both of them
    work in the Windows?
+
+   A: We can ignore both of them. In the windows, it use the following
+      format to specify interface index in the link local address:
+
+      fe80::2ff:38ff:fed8:7d97%11

component/babeld/cyginet.c

-/*
- * Some issues:
- *
- * 1. libwinet_dump_ipv6_route_table
- *
- *    Before Windows Vista, we have to use command "netsh" to get ipv6
- *    route table. But the output misses the value of route protocol.
- *
- * 2. libwinet_edit_route_entry
- *
- *    What should be the value of protocol? MIB_IPPROTO_NETMGMT or
- *    RTPROT_BABEL_LOCAL
- *
- */
-
 /* The Win32 select only worked on socket handles. The Cygwin
  * implementation allows select to function normally when given
  * different types of file descriptors (sockets, pipes, handles,
@@ -58,7 +43,7 @@ void do_debugf(int level, const char *format, ...);
 static HRESULT (WINAPI *ws_guidfromstring)(LPCTSTR psz, LPGUID pguid) = NULL;
 static HANDLE event_notify_monitor_thread = WSA_INVALID_EVENT;
 
-static PLIBWINET_INTERFACE_MAP_TABLE interface_map_table = NULL;
+static PLIBWINET_INTERFACE_MAP_TABLE g_interface_map_table = NULL;
 static int libwinet_run_command(const char *);
 
 static void
@@ -111,39 +96,64 @@ mask2len(const unsigned char *p, const int size)
 }
 
 static int
-libwinet_ipv6_interfaces_forwards(int forward)
+libwinet_set_registry_key(char *key, char * name, int value, int defvalue)
 {
-  const int MAX_BUFFER_SIZE = 255;
-  char cmdbuf[MAX_BUFFER_SIZE];
-  int result;
+  HKEY hKey;
+  unsigned long type;
+  unsigned long size;
+  unsigned long old;
 
-  struct if_nameindex * p;
-  struct if_nameindex * ptr;
-  if (NULL == (ptr = (struct if_nameindex *)if_nameindex()))
+  if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ | KEY_WRITE, &hKey) !=
+      ERROR_SUCCESS)
     return -1;
 
-  p = ptr;
-  while (p -> if_index) {
-    if (snprintf(cmdbuf,
-                 MAX_BUFFER_SIZE,
-                 "netsh interface ipv6 set interface %d forwarding=%s",
-                 p -> if_index,
-                 forward ? "enabled" : "disabled"
-                 ) >= MAX_BUFFER_SIZE)
-      break;
-    if (libwinet_run_command(cmdbuf) != 0)
-      break;
-    p ++;
+  size = sizeof(old);
+
+  if (RegQueryValueEx(hKey, name, NULL, &type, (unsigned char *)&old, &size) !=
+      ERROR_SUCCESS || type != REG_DWORD)
+    old = defvalue;
+
+  if (RegSetValueEx(hKey,
+                    name,
+                    0,
+                    REG_DWORD,
+                    (unsigned char *)&value,
+                    sizeof(value)
+                    )) {
+    RegCloseKey(hKey);
+    return -1;
   }
-  result = ! (p -> if_index);
-  if_freenameindex(ptr);
-  return result;
+
+  RegCloseKey(hKey);
+  return old;
+}
+
+/* return True if success */
+static int
+libwinet_get_registry_key(char *key, char * name, long * value)
+{
+  HKEY hKey;
+  int rc;
+  unsigned long type;
+  unsigned long size;
+
+  if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hKey) !=
+      ERROR_SUCCESS)
+    return -1;
+
+  size = sizeof(*value);
+
+  rc = (RegQueryValueEx(hKey, name, NULL, &type, (unsigned char *)value, &size) ==
+        ERROR_SUCCESS && type == REG_DWORD);
+
+  RegCloseKey(hKey);
+  return rc;
 }
 
 static void
 libwinet_free_interface_map_table()
 {
-  PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+  PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
   PLIBWINET_INTERFACE_MAP_TABLE s;
   while (p) {
     if ( p -> AdapterName )
@@ -154,7 +164,22 @@ libwinet_free_interface_map_table()
     p = p -> next;
     FREE(s);
   }
-  interface_map_table = NULL;
+  g_interface_map_table = NULL;
+}
+
+static int
+get_interface_forwards(char * guid)
+{
+  long value = 0;
+  /* Location in the Windows XP, not sure in Vista or Windows 7 */
+  char * key = "SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters"
+               "\\Interfaces\\%s";
+  char * name = "Forwards";
+  char buf[256] = {0};
+  if (snprintf(buf, 255, key, guid) > 0)
+    if (libwinet_get_registry_key(buf, name, &value))
+      return value;
+  return -1;
 }
 
 static int
@@ -191,13 +216,13 @@ libwinet_refresh_interface_map_table()
 
   if (NO_ERROR == dwRet) {
 
-    if (interface_map_table)
+    if (g_interface_map_table)
       libwinet_free_interface_map_table();
 
     PLIBWINET_INTERFACE_MAP_TABLE p;
     size_t len;
 
-    interface_map_table = NULL;
+    g_interface_map_table = NULL;
     pTmpAdaptAddr = pAdaptAddr;
     while (pTmpAdaptAddr) {
 
@@ -206,8 +231,10 @@ libwinet_refresh_interface_map_table()
         dwRet = ERROR_BUFFER_OVERFLOW;
         break;
       }
-      p -> next = interface_map_table;
-
+      p -> next = g_interface_map_table;
+      p -> IfIndex = pTmpAdaptAddr -> IfIndex;
+      p -> Ipv6IfIndex = pTmpAdaptAddr -> Ipv6IfIndex;
+      p -> RouteFlags = get_interface_forwards(pTmpAdaptAddr -> AdapterName);
       len = WideCharToMultiByte(CP_ACP,
                                 0,
                                 pTmpAdaptAddr -> FriendlyName,
@@ -250,9 +277,8 @@ libwinet_refresh_interface_map_table()
              pTmpAdaptAddr -> PhysicalAddress,
              p -> PhysicalAddressLength
              );
-
       pTmpAdaptAddr = pTmpAdaptAddr->Next;
-      interface_map_table = p;
+      g_interface_map_table = p;
     }
 
     if (ERROR_BUFFER_OVERFLOW == dwRet)
@@ -270,62 +296,32 @@ libwinet_refresh_interface_map_table()
    Return 0, if the interface only binds one ip version.
 
    Special case:
-       If the interface is loopback, it will always return 1. 
+       If the interface is loopback, it will always return 1.
+
+   Notice the parameter family specify the familay of input ifindex,
+   not output family. Actually,
+
+   family == AF_INET, it will map ipv4 to ipv6,
+   family == AF_INET6, it will map ipv6 to ipv4,
    */
 static int
 libwinet_map_ifindex(int family, int ifindex)
 {
-  IP_ADAPTER_ADDRESSES *pAdaptAddr = NULL;
-  IP_ADAPTER_ADDRESSES *pTmpAdaptAddr = NULL;
-  DWORD dwRet = 0;
-  DWORD dwSize = 0x10000;
-  DWORD dwReturn = 0;
-
-  dwRet = GetAdaptersAddresses(AF_UNSPEC,
-                               GAA_FLAG_SKIP_UNICAST            \
-                               | GAA_FLAG_SKIP_ANYCAST          \
-                               | GAA_FLAG_SKIP_MULTICAST        \
-                               | GAA_FLAG_SKIP_DNS_SERVER       \
-                               | GAA_FLAG_SKIP_FRIENDLY_NAME,
-                               NULL,
-                               pAdaptAddr,
-                               &dwSize
-                               );
-  if (ERROR_BUFFER_OVERFLOW == dwRet) {
-    FREE(pAdaptAddr);
-    if (NULL == (pAdaptAddr = (IP_ADAPTER_ADDRESSES*)MALLOC(dwSize)))
-      return 0;
-    dwRet = GetAdaptersAddresses(AF_UNSPEC,
-                                 GAA_FLAG_SKIP_UNICAST            \
-                                 | GAA_FLAG_SKIP_ANYCAST          \
-                                 | GAA_FLAG_SKIP_MULTICAST        \
-                                 | GAA_FLAG_SKIP_DNS_SERVER       \
-                                 | GAA_FLAG_SKIP_FRIENDLY_NAME,
-                                 NULL,
-                                 pAdaptAddr,
-                                 &dwSize
-                                 );
-  }
-  if (NO_ERROR == dwRet) {
-
-    pTmpAdaptAddr = pAdaptAddr;
-
-    while (pTmpAdaptAddr) {
-      if (family == AF_INET ? pTmpAdaptAddr -> IfIndex == ifindex
-          : pTmpAdaptAddr -> Ipv6IfIndex == ifindex) {
-        dwReturn = (pTmpAdaptAddr -> IfType == IF_TYPE_SOFTWARE_LOOPBACK) ?
-          1 : (family == AF_INET) ?
-          pTmpAdaptAddr -> Ipv6IfIndex : pTmpAdaptAddr -> IfIndex;
-        break;
-      }
-
-      pTmpAdaptAddr = pTmpAdaptAddr->Next;
-    }
-
-    FREE(pAdaptAddr);
+  /* Loopback Interface */
+  if (ifindex == 1)
+    return 1;
+  if (g_interface_map_table == NULL)
+    if (!libwinet_refresh_interface_map_table())
+      return -1;
+  PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
+  while (p) {
+    if (family == AF_INET && ifindex == p -> IfIndex && p -> Ipv6IfIndex)
+      return p -> Ipv6IfIndex;
+    else if (family == AF_INET6 && ifindex == p -> Ipv6IfIndex && p -> IfIndex)
+      return p -> IfIndex;
+    p = p -> next;
   }
-
-  return dwReturn;
+  return 0;
 }
 
 static int
@@ -526,7 +522,7 @@ libwinet_dump_ipv6_route_table(struct cyginet_route *routes,
       if (ignored)
         ignored = 0;
       else if (!ignored) {
-        route.proto = MIB_IPPROTO_OTHER; /* ?? */
+        route.proto = MIB_IPPROTO_NETMGMT; /* ?? */
         if ((maxroutes > count) && (proute != NULL)) {
           memcpy(proute, &route, sizeof(struct cyginet_route));
           proute ++;
@@ -816,8 +812,7 @@ cyginet_blackhole_index(struct in6_addr* addr6, char * addr)
   dwRet = GetAdaptersAddresses(AF_UNSPEC,
                                GAA_FLAG_SKIP_ANYCAST            \
                                | GAA_FLAG_SKIP_MULTICAST        \
-                               | GAA_FLAG_SKIP_DNS_SERVER       \
-                               | GAA_FLAG_SKIP_FRIENDLY_NAME,
+                               | GAA_FLAG_SKIP_DNS_SERVER,
                                NULL,
                                pAdaptAddr,
                                &dwSize
@@ -829,8 +824,7 @@ cyginet_blackhole_index(struct in6_addr* addr6, char * addr)
     dwRet = GetAdaptersAddresses(AF_UNSPEC,
                                  GAA_FLAG_SKIP_ANYCAST            \
                                  | GAA_FLAG_SKIP_MULTICAST        \
-                                 | GAA_FLAG_SKIP_DNS_SERVER       \
-                                 | GAA_FLAG_SKIP_FRIENDLY_NAME,
+                                 | GAA_FLAG_SKIP_DNS_SERVER,
                                  NULL,
                                  pAdaptAddr,
                                  &dwSize
@@ -843,16 +837,21 @@ cyginet_blackhole_index(struct in6_addr* addr6, char * addr)
       if (pTmpAdaptAddr -> IfIndex
           && pTmpAdaptAddr -> Ipv6IfIndex
           && (pTmpAdaptAddr -> OperStatus == IfOperStatusUp)
-          && (pTmpAdaptAddr -> IfType != IF_TYPE_SOFTWARE_LOOPBACK)) {
-        
+          && (pTmpAdaptAddr -> IfType != IF_TYPE_SOFTWARE_LOOPBACK)
+          && !wcscmp(pTmpAdaptAddr -> FriendlyName, L"blackhole")) {
+
         PIP_ADAPTER_UNICAST_ADDRESS p = pTmpAdaptAddr -> FirstUnicastAddress;
         while (p) {
           SOCKADDR *s;
           s =  (p -> Address).lpSockaddr;
-          if (s -> sa_family == AF_INET)
-            memcpy(addr, &(((struct sockaddr_in *)s) -> sin_addr), 4);
-          else if (s -> sa_family == AF_INET6)
-            memcpy(addr6, &(((struct sockaddr_in6 *)s) -> sin6_addr), 16);
+          if (s -> sa_family == AF_INET) {
+            if (addr)
+              memcpy(addr, &(((struct sockaddr_in *)s) -> sin_addr), 4);
+          }
+          else if (s -> sa_family == AF_INET6) {
+            if (addr6)
+              memcpy(addr6, &(((struct sockaddr_in6 *)s) -> sin6_addr), 16);
+          }
           p = p -> Next;
         }
         dwReturn = pTmpAdaptAddr -> Ipv6IfIndex;
@@ -876,15 +875,15 @@ cyginet_blackhole_index(struct in6_addr* addr6, char * addr)
  *                SetIpForwardEntry
  *
  *    Or route command
- *    
+ *
  *    Or netsh routing add persistentroute
- *    
+ *
  *    Or netsh routing add rtmroute
  *
  *    it need "Routing and Remote Access Service" running on the local
  *    machine. Use 'net start remoteaccess' on the local machine to
  *    start the service.
- *    
+ *
  * 2. IPv6 route: command "netsh"
  *
  *    C:/> netsh interface ipv6 add route
@@ -918,7 +917,7 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
     const int MAX_BUFFER_SIZE = 1024;
     const char * cmdformat = "netsh interface ipv6 %s route "
                              "prefix=%s/%d interface=%d "
-                             "%s%s %s%d";
+                             "nexthop=%s %cmetric=%d";
     char cmdbuf[MAX_BUFFER_SIZE];
     char sdest[INET6_ADDRSTRLEN];
     char sgate[INET6_ADDRSTRLEN];
@@ -935,7 +934,8 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
                           INET6_ADDRSTRLEN
                           ))
       return -1;
-
+    /* metric clause results delete route command failed, so we add
+       '#' to commet this clause when delete route.  */
     if (snprintf(cmdbuf,
                  MAX_BUFFER_SIZE,
                  cmdformat,
@@ -944,9 +944,8 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
                  sdest,
                  plen,
                  ifindex,
-                 strcmp(sgate, "::") == 0 ? "" : "nexthop=",
-                 strcmp(sgate, "::") == 0 ? "" : sgate,
-                 cmdflag == RTM_DELETE ? "#" : "metric=",
+                 sgate,
+                 cmdflag == RTM_DELETE ? '#' : ' ',
                  metric
                  ) >= MAX_BUFFER_SIZE)
       return -1;
@@ -956,23 +955,29 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
 
   }
 
-  /* Add ipv4 route before Windows Vista */
-  else if (0) {
+  /* Add ipv4 route before Windows Vista, use IP Helper API */
+  else {
     MIB_IPFORWARDROW Row;
     unsigned long Res;
+
+    struct in_addr mask;
+    plen2mask(plen, &mask);
+
     memset(&Row, 0, sizeof(MIB_IPFORWARDROW));
 
     Row.dwForwardDest = (((SOCKADDR_IN*)dest) -> sin_addr).S_un.S_addr;
     Row.dwForwardPolicy = 0;
     Row.dwForwardNextHop = (((SOCKADDR_IN*)gate) -> sin_addr).S_un.S_addr;
     Row.dwForwardIfIndex = libwinet_map_ifindex(AF_INET6, ifindex);
+    Row.dwForwardMask = mask.S_un.S_addr;
     /*
      * MIB_IPROUTE_TYPE_DIRECT <==> dwForwardNextHop == dwForwardDest
-     * MIB_IPROUTE_TYPE_LOCAL  <==> dwForwardNextHop == Ip of the interface
+     * MIB_IPROUTE_TYPE_LOCAL  <==> dwForwardNextHop in local interfaces
      * MIB_IPROUTE_TYPE_INDIRECT all the others
      */
     Row.dwForwardType = Row.dwForwardNextHop == Row.dwForwardDest ? \
       MIB_IPROUTE_TYPE_DIRECT : MIB_IPROUTE_TYPE_INDIRECT;
+    Row.dwForwardType = MIB_IPROUTE_TYPE_INDIRECT;
     Row.dwForwardProto = MIB_IPPROTO_NETMGMT;
     Row.dwForwardAge = 0;
     Row.dwForwardNextHopAS = 0;
@@ -999,7 +1004,7 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
       return -1;
   }
 
-  /* Use route command */
+#if 0 /* Use route command */  
   else {
     /* route ADD dest MASK mask gate METRIC n IF index */
     /* route CHANGE dest MASK mask gate METRIC n IF index */
@@ -1036,7 +1041,7 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
                  MAX_BUFFER_SIZE,
                  "route %s %s MASK %s %s METRIC %d IF %d",
                  cmdflag == RTM_ADD ? "add" :
-                 cmdflag == RTM_DELETE ? "delete" : "change",
+                   cmdflag == RTM_DELETE ? "delete" : "change",
                  sdest,
                  smask,
                  sgate,
@@ -1048,6 +1053,7 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
     if (libwinet_run_command(cmdbuf) != 0)
       return -1;
   }
+#endif  /* if 0 */
 
 #else
   /* Add route entry after Windows Vista */
@@ -1098,75 +1104,118 @@ libwinet_edit_route_entry(const struct sockaddr *dest,
   return 1;
 }
 
-static int
-libwinet_set_registry_key(char *key, char * name, int value, int defvalue)
+int
+cyginet_set_interface_forwards(const char * ifname, int value)
 {
-  HKEY hKey;
-  unsigned long type;
-  unsigned long size;
-  unsigned long old;
-
-  if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ | KEY_WRITE, &hKey) !=
-      ERROR_SUCCESS)
-    return -1;
-
-  size = sizeof(old);
+  /* For ipv4 */
+  /* netsh routing add interface ifname enabled/disabled */
+  char cmdbuf[255];
+  if (snprintf(cmdbuf,
+               255,
+               "netsh interface ipv6 set interface \"%s\" "
+               "forwarding=%s > /dev/null",
+               ifname,
+               value ? "enabled" : "disabled"
+               ) > 0)
+    return system(cmdbuf);
+  return -1;
+}
 
-  if (RegQueryValueEx(hKey, name, NULL, &type, (unsigned char *)&old, &size) !=
-      ERROR_SUCCESS || type != REG_DWORD)
-    old = defvalue;
+int
+cyginet_set_icmp6_redirect_accept(int value)
+{
+  char * key = "SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters";
+  char * name = "EnableICMPRedirect";
+  return libwinet_set_registry_key(key,
+                                   name,
+                                   value,
+                                   1
+                                   );
+}
 
-  if (RegSetValueEx(hKey,
-                    name,
-                    0,
-                    REG_DWORD,
-                    (unsigned char *)&value,
-                    sizeof(value)
-                    )) {
-    RegCloseKey(hKey);
-    return -1;
+static void
+libwinet_restore_ipv6_interface()
+{
+  char cmdbuf[255];
+  int rc=0;
+  PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
+  while (p) {
+    if (p -> RouteFlags != -1)
+      if (snprintf(cmdbuf,
+                   255,
+                   "netsh interface ipv6 set interface \"%s\" "
+                   "forwarding=%s > /dev/null",
+                   p -> FriendlyName,
+                   p -> RouteFlags ? "enabled" : "disabled"
+                   ) > 0)
+        rc = system(cmdbuf);
+    p = p -> next;
   }
-
-  RegCloseKey(hKey);
-  return old;
 }
 
+#if 0
 int
 cyginet_set_ipv6_forwards(int value)
 {
   char * key = "SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters";
-  /*
-  int rc;
-  rc = libwinet_ipv6_interfaces_forwards(value);
-  if (rc == -1)
-    return -1;
-  if (value) {
-    if (ERROR_IO_PENDING != EnableRouter(NULL, NULL))
-      return -1;
-  }
-  else {
-    if (NO_ERROR != UnenableRouter(NULL, NULL))
-      return -1;
-  }
-  */
+  char * name = "IPEnableRouter";
   return libwinet_set_registry_key(key,
-                                   "IPEnableRouter",
+                                   name,
                                    value,
                                    0
                                    );
 }
 
-int
-cyginet_set_icmp6_redirect_accept(int value)
+static int
+libwinet_ipv6_interfaces_forwards(int forward)
 {
-  char * key = "SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters";
+  const int MAX_BUFFER_SIZE = 255;
+  char cmdbuf[MAX_BUFFER_SIZE];
+  int result;
 
-  return libwinet_set_registry_key(key,
-                                   "EnableICMPRedirect",
-                                   value,
-                                   1
-                                   );
+  struct if_nameindex * p;
+  struct if_nameindex * ptr;
+  if (NULL == (ptr = (struct if_nameindex *)if_nameindex()))
+    return -1;
+
+  p = ptr;
+  while (p -> if_index) {
+    if (snprintf(cmdbuf,
+                 MAX_BUFFER_SIZE,
+                 "netsh interface ipv6 set interface %d forwarding=%s",
+                 p -> if_index,
+                 forward ? "enabled" : "disabled"
+                 ) >= MAX_BUFFER_SIZE)
+      break;
+    if (libwinet_run_command(cmdbuf) != 0)
+      break;
+    p ++;
+  }
+  result = ! (p -> if_index);
+  if_freenameindex(ptr);
+  return result;
+}
+
+static void
+libwinet_init_ipv6_interface()
+{
+  char cmdbuf[255];
+  int rc=0;
+  PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
+
+  while (p) {
+    if (snprintf(cmdbuf,
+                 255,
+                 "netsh interface ipv6 set interface \"%s\" " \
+                 "forwarding=enabled advertise=enabled > /dev/null",
+                 p -> FriendlyName
+                 ) > 0) {
+      rc = system(cmdbuf);
+    }
+    p = p -> next;
+  }
 }
+#endif  /* if 0 */
 
 /*
  * On Windows Vista and later, wireless network cards are reported as
@@ -1411,58 +1460,6 @@ cyginet_loopback_index(int family)
   return 1;
 }
 
-char *
-cyginet_ipv4_index2ifname(int ifindex)
-{
-  IP_ADAPTER_ADDRESSES *pAdaptAddr = NULL;
-  IP_ADAPTER_ADDRESSES *pTmpAdaptAddr = NULL;
-  DWORD dwRet = 0;
-  DWORD dwSize = 0x10000;
-  DWORD dwFamily = AF_INET;
-  char * ifname = NULL;
-
-  dwRet = GetAdaptersAddresses(dwFamily,
-                               GAA_FLAG_SKIP_UNICAST            \
-                               | GAA_FLAG_SKIP_ANYCAST          \
-                               | GAA_FLAG_SKIP_MULTICAST        \
-                               | GAA_FLAG_SKIP_DNS_SERVER,
-                               NULL,
-                               pAdaptAddr,
-                               &dwSize
-                               );
-  if (ERROR_BUFFER_OVERFLOW == dwRet) {
-    FREE(pAdaptAddr);
-    if (NULL == (pAdaptAddr = (IP_ADAPTER_ADDRESSES*)MALLOC(dwSize)))
-      return NULL;
-    dwRet = GetAdaptersAddresses(dwFamily,
-                                 GAA_FLAG_SKIP_UNICAST            \
-                                 | GAA_FLAG_SKIP_ANYCAST          \
-                                 | GAA_FLAG_SKIP_MULTICAST        \
-                                 | GAA_FLAG_SKIP_DNS_SERVER,
-                                 NULL,
-                                 pAdaptAddr,
-                                 &dwSize
-                                 );
-  }
-
-  if (NO_ERROR == dwRet) {
-    pTmpAdaptAddr = pAdaptAddr;
-    while (pTmpAdaptAddr) {
-
-      if (pTmpAdaptAddr -> IfIndex == ifindex) {
-        ifname = cyginet_ifname(pTmpAdaptAddr -> AdapterName);
-        break;
-      }
-
-      pTmpAdaptAddr = pTmpAdaptAddr->Next;
-    }
-
-    FREE(pAdaptAddr);
-  }
-
-  return ifname;
-}
-
 /*
  * There are 3 ways to dump route table in the Windows:
  *
@@ -1632,12 +1629,17 @@ cyginet_read_route_socket(void *buffer, size_t size)
   return 0;
 }
 
+int 
+cyginet_refresh_interface_table()
+{
+  return libwinet_refresh_interface_map_table();
+}
+
 int
 cyginet_startup()
 {
   WORD wVersionRequested;
   WSADATA wsaData;
-
   /* Use the MAKEWORD(lowbyte, highbyte) macro declared in Windef.h */
   wVersionRequested = MAKEWORD(2, 2);
   return WSAStartup(wVersionRequested, &wsaData);
@@ -1646,6 +1648,8 @@ cyginet_startup()
 void
 cyginet_cleanup()
 {
+  libwinet_restore_ipv6_interface();
+  libwinet_free_interface_map_table();
   WSACleanup();
 }
 
@@ -1653,10 +1657,10 @@ char *
 cyginet_guidname(const char * ifname)
 {
   PLIBWINET_INTERFACE_MAP_TABLE p;
-  if (!interface_map_table)
+  if (!g_interface_map_table)
     libwinet_refresh_interface_map_table();
 
-  p = interface_map_table;
+  p = g_interface_map_table;
   while (p) {
     if (strcmp(ifname, p -> FriendlyName) == 0)
       return p -> AdapterName;
@@ -1669,10 +1673,10 @@ char *
 cyginet_ifname(const char * guidname)
 {
   PLIBWINET_INTERFACE_MAP_TABLE p;
-  if (!interface_map_table)
+  if (!g_interface_map_table)
     libwinet_refresh_interface_map_table();
 
-  p = interface_map_table;
+  p = g_interface_map_table;
   while (p) {
     if (strcmp(guidname, p -> AdapterName) == 0)
       return p -> FriendlyName;
@@ -1681,9 +1685,89 @@ cyginet_ifname(const char * guidname)
   return NULL;
 }
 
+int
+cyginet_add_ipentry(int ifindex, struct sockaddr *addr)
+{
+  MIB_IPNETROW row;
+  PLIBWINET_INTERFACE_MAP_TABLE p;
+  if (!g_interface_map_table)
+    libwinet_refresh_interface_map_table();
+
+  p = g_interface_map_table;
+  while (p) {
+    if (p -> IfIndex == ifindex) {
+      row.dwPhysAddrLen = p -> PhysicalAddressLength;
+      if (row.dwPhysAddrLen > MAXLEN_PHYSADDR)
+        return -1;
+      memcpy(row.bPhysAddr, p -> PhysicalAddress, row.dwPhysAddrLen);
+      break;
+    }
+    p = p -> next;
+  }
+  if (row.dwPhysAddrLen) {
+    row.dwIndex = ifindex;  
+    row.dwAddr = (((SOCKADDR_IN*)addr) -> sin_addr).S_un.S_addr;
+    row.dwType = MIB_IPNET_TYPE_DYNAMIC; 
+    return CreateIpNetEntry ( &row );
+  }
+  return -1;
+}
+
 /* The following functions are reserved. */
 #if 0
 
+char *
+cyginet_ipv4_index2ifname(int ifindex)
+{
+  IP_ADAPTER_ADDRESSES *pAdaptAddr = NULL;
+  IP_ADAPTER_ADDRESSES *pTmpAdaptAddr = NULL;
+  DWORD dwRet = 0;
+  DWORD dwSize = 0x10000;
+  DWORD dwFamily = AF_INET;
+  char * ifname = NULL;
+
+  dwRet = GetAdaptersAddresses(dwFamily,
+                               GAA_FLAG_SKIP_UNICAST            \
+                               | GAA_FLAG_SKIP_ANYCAST          \
+                               | GAA_FLAG_SKIP_MULTICAST        \
+                               | GAA_FLAG_SKIP_DNS_SERVER,
+                               NULL,
+                               pAdaptAddr,
+                               &dwSize
+                               );
+  if (ERROR_BUFFER_OVERFLOW == dwRet) {
+    FREE(pAdaptAddr);
+    if (NULL == (pAdaptAddr = (IP_ADAPTER_ADDRESSES*)MALLOC(dwSize)))
+      return NULL;
+    dwRet = GetAdaptersAddresses(dwFamily,
+                                 GAA_FLAG_SKIP_UNICAST            \
+                                 | GAA_FLAG_SKIP_ANYCAST          \
+                                 | GAA_FLAG_SKIP_MULTICAST        \
+                                 | GAA_FLAG_SKIP_DNS_SERVER,
+                                 NULL,
+                                 pAdaptAddr,
+                                 &dwSize
+                                 );
+  }
+
+  if (NO_ERROR == dwRet) {
+    pTmpAdaptAddr = pAdaptAddr;
+    while (pTmpAdaptAddr) {
+
+      if (pTmpAdaptAddr -> IfIndex == ifindex) {
+        ifname = cyginet_ifname(pTmpAdaptAddr -> AdapterName);
+        break;
+      }
+
+      pTmpAdaptAddr = pTmpAdaptAddr->Next;
+    }
+
+    FREE(pAdaptAddr);
+  }
+
+  return ifname;
+}
+
 static int
 libwinet_get_loopback_index(int family)
 {
@@ -2282,7 +2366,7 @@ DWORD GetInterfaceIndexForAddress(SOCKADDR *pAddr)
 
     FREE(pAdaptAddr);
   }
-  
+
   return dwReturn;
 }
 
@@ -2498,7 +2582,7 @@ runTestCases()
       if_freenameindex(ptr);
     }
   }
-
+  /*
   printf("\n\nTest cyginet_ipv4_index2ifname:\n\n");
   {
     int ifindex = 1;
@@ -2507,10 +2591,10 @@ runTestCases()
            cyginet_ipv4_index2ifname(ifindex)
            );
   }
-
+  */
   printf("\n\nTest cyginet_guidname works in the Cygwin:\n\n");
   {
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
       printf("%s:\t\t%s\n",
              p -> FriendlyName,
@@ -2546,7 +2630,7 @@ runTestCases()
 
   printf("\n\nTest libwinet_is_wireless_interface:\n\n");
   {
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
       printf("%s is wireless netcard: %d\n",
              p -> FriendlyName,
@@ -2585,6 +2669,7 @@ runTestCases()
     }
   }
 
+  /*
   printf("\n\nTest cyginet_set_ipv6_forwards:\n\n");
   {
     printf("cyginet_set_ipv6_forwards(1) return %d\n",
@@ -2604,11 +2689,12 @@ runTestCases()
            cyginet_set_icmp6_redirect_accept(1)
            );
   }
+  */
 
   printf("\n\nTest cyginet_interface_wireless:\n\n");
   {
     int n;
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
       n = cyginet_interface_wireless(p -> FriendlyName, 1);
       printf("%s is wireless netcard: %d\n", p -> FriendlyName, n);
@@ -2619,7 +2705,7 @@ runTestCases()
   printf("\n\nTest cyginet_interface_mtu:\n\n");
   {
     int n;
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
       n = cyginet_interface_mtu(p -> FriendlyName, 1);
       printf("mtu of %s is : %d\n", p -> FriendlyName, n);
@@ -2630,7 +2716,7 @@ runTestCases()
   printf("\n\nTest cyginet_interface_operational:\n\n");
   {
     int n;
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
       n = cyginet_interface_operational(p -> FriendlyName, 1);
       printf("%s is up: %d\n", p -> FriendlyName, n);
@@ -2642,7 +2728,7 @@ runTestCases()
   {
     struct sockaddr_in sa;
     int n;
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
       memset(&sa, 0, sizeof(sa));
       n = cyginet_interface_ipv4(p -> FriendlyName, 1, (unsigned char*)&sa);
@@ -2655,7 +2741,7 @@ runTestCases()
   {
     int n;
     struct sockaddr_dl sdl;
-    PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+    PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
     while (p) {
         memset(&sdl, 0, sizeof(struct sockaddr_dl));
         n = cyginet_interface_sdl(&sdl, p -> FriendlyName);
@@ -2767,9 +2853,9 @@ runTestCases()
 
     if (inet_pton(AF_INET, "192.168.128.119", &dest4.sin_addr) != 1)
       break;
-    if (inet_pton(AF_INET, "192.168.128.200", &gate4.sin_addr) != 1)
+    if (inet_pton(AF_INET, "192.168.121.200", &gate4.sin_addr) != 1)
       break;
-    ifindex = 2;
+    ifindex = 5;
     metric = 3;
     prefix = 32;
 
@@ -2877,10 +2963,11 @@ int main(int argc, char* argv[])
   printf("\n\nTest libwinet_refresh_interface_map_table:\n\n");
   {
     if (libwinet_refresh_interface_map_table()) {
-      PLIBWINET_INTERFACE_MAP_TABLE p = interface_map_table;
+      PLIBWINET_INTERFACE_MAP_TABLE p = g_interface_map_table;
       while (p) {
         printf("Friendly Name:\t %s\n", p -> FriendlyName);
         printf("Adapter Name:\t %s\n", p -> AdapterName);
+        printf("Forward flag:\t %d\n", p -> RouteFlags);
         printf("IfType:\t %ld\n", p -> IfType);
         p = p -> next;
       }
@@ -2891,8 +2978,15 @@ int main(int argc, char* argv[])
 
   runTestCases();
 
+  /* printf("\n\nTest libwinet_init_ipv6_interface:\n\n"); */
+  /* libwinet_init_ipv6_interface(); */
+
+  /* printf("\n\nTest libwinet_restore_ipv6_interface:\n\n"); */
+  /* libwinet_restore_ipv6_interface(); */
+
   printf("\n\nTest libwinet_free_interface_map_table:\n\n");
   libwinet_free_interface_map_table();
+  printf("\n\nTest Finished.\n\n");
 
   WSACleanup();
   return 0;

component/babeld/cyginet.h

@@ -46,15 +46,50 @@
   IPv6 RFCs and Standards Working Groups
   http://www.ipv6now.com.au/RFC.php
 
-  Routing Table Manager Version 2  
+  Routing Table Manager Version 2
   http://msdn.microsoft.com/en-us/library/windows/desktop/bb404201(v=vs.85).aspx
 
-  Using Routing Table Manager Version 2
+  Using Routing Table Manager Version 2, this section contains sample
+  code that can be used when developing clients such as routing
+  protocols.
   http://msdn.microsoft.com/en-us/library/windows/desktop/aa382335(v=vs.85).aspx
 
-  This section contains sample code that can be used when developing
-  clients such as routing protocols.
+  An introduction to the IPv6 protocol along with overviews on
+  deployment and IPv6 transitioning technologies is available on
+  Technet at Microsoft Internet Protocol Version 6 (IPv6).
+  http://go.microsoft.com/fwlink/p/?linkid=194338
+  http://technet.microsoft.com/en-us/network/bb530961.aspx
 
+  Internet Protocol Version 6 (IPv6)
+  http://msdn.microsoft.com/en-us//library/windows/desktop/ms738570(v=vs.85).aspx
+
+  IPv6 Link-local and Site-local Addresses
+  http://msdn.microsoft.com/zh-cn/library/windows/desktop/ms739166(v=vs.85).aspx
+
+  Recommended Configurations for IPv6
+  http://msdn.microsoft.com/en-us/library/windows/desktop/ms740117(v=vs.85).aspx
+
+  IPv6 Support in Home Routers, It looks like a windows re6stnet.
+  http://msdn.microsoft.com/en-us/windows/hardware/gg463251.aspx
+
+  Neighbor Discovery in IPv6
+  http://tools.ietf.org/html/rfc4861
+
+  Default Address Selection for Internet Protocol version 6 (IPv6)
+  http://tools.ietf.org/html/rfc3484
+
+  Path MTU Discovery
+  http://tools.ietf.org/html/rfc1191
+
+  IPv6 Traffic Between Nodes on Different Subnets of an IPv4 Internetwork (6to4)
+  http://msdn.microsoft.com/zh-cn/library/windows/desktop/ms737598(v=vs.85).aspx
+
+  Multicast Listener Discovery (MLD)
+  http://msdn.microsoft.com/en-us/library/aa916334.aspx
+
+  IPv6 Addresses, it explains the relation between link-local address
+  and interface id
+  http://msdn.microsoft.com/en-us/library/aa921042.aspx
  */
 
 #ifndef __CYGIFNET_H__
@@ -112,12 +147,15 @@ struct if_nameindex {
   char     *if_name;
 };
 
-typedef struct _LIBWINET_INTERFACE_MAP_TABLE {  
-  PCHAR     FriendlyName;    
+typedef struct _LIBWINET_INTERFACE_MAP_TABLE {
+  PCHAR     FriendlyName;
   PCHAR     AdapterName;
   BYTE      PhysicalAddress[MAX_ADAPTER_ADDRESS_LENGTH];
   DWORD     PhysicalAddressLength;
   DWORD     IfType;
+  int       RouteFlags;
+  DWORD     IfIndex;
+  DWORD     Ipv6IfIndex;
   VOID      *next;
 } LIBWINET_INTERFACE_MAP_TABLE, *PLIBWINET_INTERFACE_MAP_TABLE;
 
@@ -163,8 +201,8 @@ void cyginet_cleanup();
 
 int cyginet_start_monitor_route_changes(int);
 int cyginet_stop_monitor_route_changes();
-int cyginet_set_ipv6_forwards(int);
 int cyginet_set_icmp6_redirect_accept(int);
+int cyginet_set_interface_forwards(const char * ifname, int value);
 
 int cyginet_interface_sdl(struct sockaddr_dl *, char *);
 int cyginet_interface_wireless(const char *, int);
@@ -182,10 +220,9 @@ int cyginet_delete_route_entry(const struct sockaddr *, unsigned short,
 int cyginet_update_route_entry(const struct sockaddr *, unsigned short,
                                const struct sockaddr *, int , unsigned int);
 
+int cyginet_add_ipentry(int, struct sockaddr*);
+
 char * cyginet_ifname(const char *);
 char * cyginet_guidname(const char *);
-char * cyginet_ipv4_index2ifname(int);
-
-int cyginet_blackhole_index(struct in6_addr*, char *);
-
+int cyginet_refresh_interface_table();
 #endif  /* __CYGIFNET_H__ */

component/babeld/kernel_cygwin.c

@@ -43,38 +43,15 @@ THE SOFTWARE.
 #include "neighbour.h"
 #include "kernel.h"
 #include "util.h"
+#include "interface.h"
 
 #include "cyginet.h"
 
-/*
- * Some issues:
- *
- * 1. kernel_route
- *
- *    RTM_BLACKHOLE, gateway will be set as loopback, is it right?
- *
- * 2. IN6_LINKLOCAL_IFINDEX && SET_IN6_LINKLOCAL_IFINDEX
- *
- *    Do both of them work in the Windows?
- *
- * 3. kernel_interface_ipv4
- *
- *    How to deal with many ipv4 address assigned in one interface,
- *    now only the first one returned.
- *
- */
-
 static int get_sdl(struct sockaddr_dl *sdl, char *guidname);
 
 static const unsigned char v4prefix[16] =
     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 };
 
-static int ifindex_blackhole = -1;
-static struct in6_addr blackhole_addr6 = {{IN6ADDR_LOOPBACK_INIT}};
-static char blackhole_addr[1][1][16] = 
-        {{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-            0x00, 0x00, 0x00, 0x00, 0x7f, 0x00, 0x00, 0x01 }}};
-
 int export_table = -1, import_table = -1;
 
 int
@@ -110,113 +87,98 @@ get_sdl(struct sockaddr_dl *sdl, char *ifname)
     return cyginet_interface_sdl(sdl, ifname);
 }
 
-/* KAME said : "Following two macros are highly depending on KAME Release" */
-#define	IN6_LINKLOCAL_IFINDEX(a)  ((a).s6_addr[2] << 8 | (a).s6_addr[3])
-#define SET_IN6_LINKLOCAL_IFINDEX(a, i)         \
-    do {                                        \
-        (a).s6_addr[2] = ((i) >> 8) & 0xff;     \
-        (a).s6_addr[3] = (i) & 0xff;            \
-    } while (0)
-
 static int old_forwarding = -1;
 static int old_accept_redirects = -1;
 
 static int ifindex_lo = 1;
 static int kernel_pipe_handles[2];
 
+/* It enables ip6.forwarding and disable ip6.redirect.
+ *
+ * Option 1:
+ *
+ * IPV6CTL_FORWARDING (ip6.forwarding) Boolean: enable/disable
+ * forward- ing of IPv6 packets.  Also, identify if the node is
+ * acting as a router.  Defaults to off.
+ *
+ * ==> In the Windows, MSDN says in the registry
+ *
+ * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
+ *
+ * Value Name: IPEnableRouter
+ * Value type: REG_DWORD
+ * Value Data: 1
+ *
+ * A value of 1 enables TCP/IP forwarding for all network
+ * connections that are installed and used by this computer.
+ *
+ * Refer to: http://support.microsoft.com/kb/315236/en-us
+ *
+ * For ipv6, no global options to enable forwarding, but for each
+ * interface respectively.
+ * 
+ * Option 2:
+ *
+ * ICMPV6CTL_REDIRACCEPT
+ *
+ * IPV6CTL_SENDREDIRECTS (ip6.redirect) Boolean: enable/disable
+ * sending of ICMPv6 redirects in response to unforwardable IPv6
+ * packets.  This option is ignored unless the node is routing
+ * IPv6 packets, and should normally be enabled on all systems.
+ * Defaults to on.
+ *
+ * ==> MSDN says in the registry
+ *
+ * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
+ *
+ * EnableICMPRedirect = 0
+ *
+ * Regarding ipv6, it's in the registry
+ *
+ * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
+ *
+ * Refer to:
+ *     http://technet.microsoft.com/en-us/library/cc766102(v=ws.10).aspx
+ *     http://msdn.microsoft.com/en-us/library/aa915651.aspx
+ *     
+ * Notice the msdn page of Windows CE, value is "EnableICMPRedirects",
+ * it's plural. But I'd rather use singluar form "EnableICMPRedirect".
+ *
+ */
+
 int
 kernel_setup(int setup)
 {
-    int rc = 0;
-    int forwarding = 1;
-    int accept_redirects = 0;
-    int reboot = 0;
-
-    /* It enables ip6.forwarding and disable ip6.redirect.
-     *
-     * Option 1:
-     *
-     * IPV6CTL_FORWARDING (ip6.forwarding) Boolean: enable/disable
-     * forward- ing of IPv6 packets.  Also, identify if the node is
-     * acting as a router.  Defaults to off.
-     *
-     * ==> command line:
-     *
-     *     C:/> ipv6 ifc $If6Index forwards
-     *
-     *     repeat this operation for all ipv6 interfaces
-     *
-     *     List all ipv6 interface by the command:
-     *
-     *         C:/> netsh interface ipv6 show interface
-     *
-     * ==> API: EnableRouter/DisableRouter (only for ipv4)
-     *
-     * ==> MSDN says in the registry
-     *
-     * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
-     *
-     * Value Name: IPEnableRouter
-     * Value type: REG_DWORD
-     * Value Data: 1
-     *
-     * A value of 1 enables TCP/IP forwarding for all network
-     * connections that are installed and used by this computer.
-     *
-     * Refer to: http://support.microsoft.com/kb/315236/en-us
-     *
-     * Option 2:
-     *
-     * ICMPV6CTL_REDIRACCEPT
-     *
-     * IPV6CTL_SENDREDIRECTS (ip6.redirect) Boolean: enable/disable
-     * sending of ICMPv6 redirects in response to unforwardable IPv6
-     * packets.  This option is ignored unless the node is routing
-     * IPv6 packets, and should normally be enabled on all systems.
-     * Defaults to on.
-     *
-     * ==> MSDN says in the registry
-     *
-     * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
-     *
-     * EnableICMPRedirect = 0
-     *
-     * Refer to:
-     *
-     *     http://technet.microsoft.com/en-us/library/cc766102(v=ws.10).aspx
-     *
-     * After change them, need to reboot machine.
-     *
-     * Notice:
-     *
-     * MSDN says nothing about ipv6, it should use the following key
-     *
-     * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
-     *
-     * Maybe later Window VISTA its corresponding APIs are
-     * WSAEnumProtocols, WSCUpdateProvider.
-     *
-     */
+    int flags=0;
+    struct interface *ifp;
 
     if (setup) {
-        int flags;
+
         if (0 != cyginet_startup())
             return -1;
-        if ((rc = cyginet_set_ipv6_forwards(forwarding)) == -1) {
-            fprintf(stderr, "Cannot enable IPv6 forwarding.\n");
+
+        /* We don't disable ICMPv6 redirect in the Windows */
+        /* 
+        if ((rc = cyginet_set_icmp6_redirect_accept(0)) == -1) {
+            fprintf(stderr, "Cannot disable ICMPv6 redirect.\n");
             return -1;
         }
-        old_forwarding = rc;
-        reboot = (rc == forwarding) ? reboot : 1;
 
-        if ((rc = cyginet_set_icmp6_redirect_accept(accept_redirects)) == -1) {
-            fprintf(stderr, "Cannot disable ICMPv6 redirect.\n");
-            if (reboot)
-                cyginet_set_ipv6_forwards(old_forwarding);
+        if (rc) {
+            fprintf(stderr,
+                    "Disable ICMPv6 redirect successfully. Reboot computer "
+                    "to take it effect now.\n\n"
+                    );
             return -1;
         }
-        old_accept_redirects = rc;
-        reboot = (rc == accept_redirects) ? reboot : 1;
+        */        
+        FOR_ALL_INTERFACES(ifp) {
+            if (cyginet_set_interface_forwards(ifp->name, 1) == -1) {
+                fprintf(stderr, "Cannot enable IPv6 forwarding.\n");
+                return -1;
+            }
+        }
+
         if (pipe(kernel_pipe_handles) == -1)
             return -1;
         if ((flags = fcntl(kernel_pipe_handles[0], F_GETFL, 0)) < 0)
@@ -225,34 +187,14 @@ kernel_setup(int setup)
             goto error;
     }
     else {
-        if (-1 == (rc = cyginet_set_ipv6_forwards(old_forwarding)))
-            return -1;
-        reboot = (rc == forwarding) ? reboot : 1;
-        if (-1 ==
-            (rc = cyginet_set_icmp6_redirect_accept(old_accept_redirects)))
-            return -1;
-        reboot = (rc == accept_redirects) ? reboot : 1;
         close(kernel_pipe_handles[0]);
         close(kernel_pipe_handles[1]);
         cyginet_cleanup();
     }
-
-    if (reboot)
-        fprintf(stderr,
-                "%s IPv6 forwarding and %s ICMPv6 redirect successfully.\n"
-                "REBOOT NOW, so that these changes take effect.\n\n",
-                forwarding ? "Enable" : "Disable",
-                accept_redirects ? "enable" : "disable"
-                );
     return 1;
 
- error: {
-        if (reboot) {
-            cyginet_set_ipv6_forwards(old_forwarding);
-            cyginet_set_icmp6_redirect_accept(old_accept_redirects);
-        }
-        return -1;
-    }
+ error:
+    return -1;
 }
 
 int
@@ -363,12 +305,13 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
              const unsigned char *newgate, int newifindex,
              unsigned int newmetric)
 {
+    char blackhole_addr6[1][1][16] = {{{0}}};
+    char blackhole_addr[1][1][16] = {{{0}}};
     int rc, ipv4;
-    struct sockaddr_in ipv4_destnation={0}, ipv4_gateway={0};
-    struct sockaddr_in6 ipv6_destnation={0}, ipv6_gateway={0};
-    struct sockaddr *destination, *gateway;
     int route_ifindex;
     int prefix_len;
+    struct sockaddr_storage destination = {0};
+    struct sockaddr_storage gateway = {0};
 
     /* Check that the protocol family is consistent. */
     if(plen >= 96 && v4mapped(dest)) {
@@ -377,16 +320,12 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
             return -1;
         }
         ipv4 = 1;
-        destination = (struct sockaddr*)&ipv4_destnation;
-        gateway = (struct sockaddr*)&ipv4_gateway;
     } else {
         if(v4mapped(gate)) {
             errno = EINVAL;
             return -1;
         }
         ipv4 = 0;
-        destination = (struct sockaddr*)&ipv6_destnation;
-        gateway = (struct sockaddr*)&ipv6_gateway;
     }
 
     if(operation == ROUTE_MODIFY && newmetric == metric &&
@@ -394,9 +333,8 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
       return 0;
 
     if(operation == ROUTE_MODIFY) {
-        /* Do not use ROUTE_MODIFY when changing to a neighbour.
-           It is the only way to remove the "gateway" flag. */
-        if(ipv4 && plen == 128 && memcmp(dest, newgate, 16) == 0) {
+        if((metric == KERNEL_INFINITY) ||
+           (ipv4 && plen == 128 && memcmp(dest, newgate, 16) == 0)) {
             kernel_route(ROUTE_FLUSH, dest, plen,
                          gate, ifindex, metric,
                          NULL, 0, 0);
@@ -409,6 +347,13 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
             ifindex = newifindex;
         }
     }
+    /* We don't add/delete a blackhole for default route */
+    else if (newmetric == KERNEL_INFINITY &&
+       IN6_IS_ADDR_UNSPECIFIED(dest) &&
+       IN6_IS_ADDR_UNSPECIFIED(newgate))
+      return 0;
+
+
 
     kdebugf("kernel_route: %s %s/%d metric %d dev %d nexthop %s\n",
             operation == ROUTE_ADD ? "add" :
@@ -423,70 +368,70 @@ kernel_route(int operation, const unsigned char *dest, unsigned short plen,
 
     if(metric == KERNEL_INFINITY) {
         /* It means this route has property: RTF_BLACKHOLE */
-        if (ifindex_blackhole < 0) {
-            /* ifindex_blackhole = cyginet_blackhole_index(&blackhole_addr6, */
-            /*                                             blackhole_addr[0][0]+12 */
-            /*                                             ); */
-            ifindex_blackhole = 1;
-            if(ifindex_blackhole <= 0)
+        if(ifindex_lo < 0) {
+            ifindex_lo = cyginet_loopback_index(AF_UNSPEC);
+            if(ifindex_lo <= 0)
                 return -1;
         }
-        route_ifindex = ifindex_blackhole;
+        route_ifindex = ifindex_lo;
     }
 
 #define PUSHADDR(dst, src)                                              \
-    do { struct sockaddr_in *sin = (struct sockaddr_in*)(dst);          \
+    do { struct sockaddr_in *sin = (struct sockaddr_in*)&(dst);          \
         sin->sin_family = AF_INET;                                      \
         memcpy(&sin->sin_addr, (src) + 12, 4);                          \
     } while (0)
 
 #define PUSHADDR6(dst, src)                                             \
-    do { struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)(dst);       \
+    do { struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)&(dst);       \
         sin6->sin6_family = AF_INET6;                                   \
         memcpy(&sin6->sin6_addr, (src), 16);                            \
-        if(IN6_IS_ADDR_LINKLOCAL (&sin6->sin6_addr))                    \
-            SET_IN6_LINKLOCAL_IFINDEX (sin6->sin6_addr, ifindex);       \
     } while (0)
 
     if(ipv4) {
-
         PUSHADDR(destination, dest);
         if (metric == KERNEL_INFINITY)
             PUSHADDR(gateway, **blackhole_addr);
+        else if(plen == 128 && memcmp(dest+12, gate+12, 4) == 0) {
+            /*  It means add arp record, add dest ip to this interface */
+            if (cyginet_add_ipentry(ifindex,
+                                    (struct sockaddr*)&destination) != 0)
+                return -1;
+        }
         else
             PUSHADDR(gateway, gate);
 
     } else {
         PUSHADDR6(destination, dest);
         if (metric == KERNEL_INFINITY)
-            PUSHADDR6(gateway, &blackhole_addr6);
-        else
+            PUSHADDR6(gateway, **blackhole_addr6);
+        else 
             PUSHADDR6(gateway, gate);
     }
 #undef PUSHADDR
 #undef PUSHADDR6
-    /* What if route_ifindex == 0 */    
+    /* what if route_ifindex == 0 */    
     switch(operation) {
     case ROUTE_FLUSH:
-        rc = cyginet_delete_route_entry(destination,
+        rc = cyginet_delete_route_entry((struct sockaddr*)&destination,
                                         prefix_len,
-                                        gateway,
+                                        (struct sockaddr*)&gateway,
                                         route_ifindex,
                                         metric
                                         );
         break;
     case ROUTE_ADD:
-        rc = cyginet_add_route_entry(destination,
+        rc = cyginet_add_route_entry((struct sockaddr*)&destination,
                                      prefix_len,
-                                     gateway,
+                                     (struct sockaddr*)&gateway,
                                      route_ifindex,
                                      metric
                                      );
         break;
     case ROUTE_MODIFY:
-        rc = cyginet_update_route_entry(destination,
+        rc = cyginet_update_route_entry((struct sockaddr*)&destination,
                                         prefix_len,
-                                        gateway,
+                                        (struct sockaddr*)&gateway,
                                         route_ifindex,
                                         metric
                                         );
@@ -564,10 +509,6 @@ parse_kernel_route(struct cyginet_route *src, struct kernel_route *route)
     if(sa->sa_family == AF_INET6) {
         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
         memcpy(route->gw, &sin6->sin6_addr, 16);
-        if(IN6_IS_ADDR_LINKLOCAL (&sin6->sin6_addr)) {
-            route->ifindex = IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr);
-            SET_IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr, 0);
-        }
     } else if(sa->sa_family == AF_INET) {
         struct sockaddr_in *sin = (struct sockaddr_in *)sa;
         v4tov6(route->gw, (unsigned char *)&sin->sin_addr);
@@ -661,11 +602,6 @@ kernel_addresses(char *ifname, int ifindex, int ll,
             if(!!ll != !!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
                 goto next;
             memcpy(routes[i].prefix, &sin6->sin6_addr, 16);
-            if(ll)
-                /* This a perfect example of counter-productive optimisation :
-                   KAME encodes interface index onto bytes 2 and 3, so we have to
-                   reset those bytes to 0 before passing them to babeld. */
-                memset(routes[i].prefix + 2, 0, 2);
             routes[i].plen = 128;
             routes[i].metric = 0;
             routes[i].ifindex = ifindex;
@@ -705,8 +641,9 @@ kernel_callback(int (*fn)(int, void*), void *closure)
     /* In the Windows, we can't get the exact changed route, but the
        route table is really changed. */
     kdebugf("Kernel table changed.\n");
+    cyginet_refresh_interface_table();
     clear_kernel_socket_event();
-
+    
     return fn(~0, closure);
 }
 

component/babeld/net.c

@@ -49,6 +49,11 @@ babel_socket(int port)
     if(s < 0)
         return -1;
 
+    /* When this value is nonzero (the default on Windows), a socket
+       created for the AF_INET6 address family can be used to send and
+       receive IPv6 packets only.  So it's not require to set in the
+       Windows XP. Actualy, this socket option is only supported on
+       Windows Vista or later. */
 #if !defined(_WIN32_WINNT) || _WIN32_WINNT >= 0x0600
     rc = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
     if(rc < 0)