ws2_32: Manage shorter length for IP_PKTINFO.

dlls/ws2_32/socket.c

@@ -1761,6 +1761,12 @@ int WINAPI getsockopt( SOCKET s, int level, int optname, char *optval, int *optl
             return server_getsockopt( s, IOCTL_AFD_WINE_GET_IP_OPTIONS, optval, optlen );
 
         case IP_PKTINFO:
+            if (*optlen < sizeof(DWORD) || !optval)
+            {
+                *optlen = 0;
+                SetLastError( WSAEFAULT );
+                return SOCKET_ERROR;
+            }
             return server_getsockopt( s, IOCTL_AFD_WINE_GET_IP_PKTINFO, optval, optlen );
 
         case IP_RECVTOS:
@@ -3072,6 +3078,11 @@ int WINAPI setsockopt( SOCKET s, int level, int optname, const char *optval, int
             return server_setsockopt( s, IOCTL_AFD_WINE_SET_IP_OPTIONS, optval, optlen );
 
         case IP_PKTINFO:
+            if (optlen < sizeof(DWORD) || !optval)
+            {
+                SetLastError( WSAEFAULT );
+                return SOCKET_ERROR;
+            }
             return server_setsockopt( s, IOCTL_AFD_WINE_SET_IP_PKTINFO, optval, optlen );
 
         case IP_RECVTOS:

dlls/ws2_32/tests/sock.c

@@ -1184,6 +1184,7 @@ static void test_set_getsockopt(void)
         {AF_INET, SOCK_STREAM, IPPROTO_TCP, TCP_NODELAY, TRUE, {1, 1, 1}, {0}, TRUE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_MULTICAST_LOOP, TRUE, {1, 1, 4}, {0}, TRUE, TRUE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_MULTICAST_TTL, TRUE, {1, 1, 4}, {0}, FALSE},
+        {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_PKTINFO, FALSE, {0, 0, 4}, {0}, TRUE, TRUE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_TOS, TRUE, {1, 1, 4}, {0}, FALSE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_TTL, TRUE, {1, 1, 4}, {0}, FALSE},
     };