Add a sample config with CONFIG_SIM_NETDEV_VPNKIT

boards/sim/sim/sim/NETWORK-VPNKIT.txt

@@ -12,6 +12,11 @@ Configuration
     CONFIG_SIM_NETDEV_TAP is not set
     CONFIG_SIM_NETDEV_VPNKIT=y
 
+You can use the sim:vpnkit configuration, which includes the above
+settings.
+
+    ./tools/configure.sh sim:vpnkit
+
 VPNKit setup
 ------------
 

boards/sim/sim/sim/README.txt

@@ -1264,3 +1264,7 @@ ustream
 
   Note that the binfs file system is mounted at /bin when the system starts
   up.
+
+vpnkit
+
+  This is a configuration with VPNKit support.  See NETWORK-VPNKIT.txt.

boards/sim/sim/sim/configs/vpnkit/defconfig

@@ -0,0 +1,99 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+# CONFIG_NSH_DISABLE_DATE is not set
+CONFIG_ARCH="sim"
+CONFIG_ARCH_BOARD="sim"
+CONFIG_ARCH_BOARD_SIM=y
+CONFIG_ARCH_CHIP="sim"
+CONFIG_ARCH_SIM=y
+CONFIG_BOARDCTL_APP_SYMTAB=y
+CONFIG_BOARDCTL_POWEROFF=y
+CONFIG_BOARD_LOOPSPERMSEC=0
+CONFIG_BOOT_RUNFROMEXTSRAM=y
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_ASSERTIONS=y
+CONFIG_DEBUG_BINFMT=y
+CONFIG_DEBUG_BINFMT_ERROR=y
+CONFIG_DEBUG_BINFMT_INFO=y
+CONFIG_DEBUG_BINFMT_WARN=y
+CONFIG_DEBUG_ERROR=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEBUG_WARN=y
+CONFIG_DEV_LOOP=y
+CONFIG_DEV_ZERO=y
+CONFIG_DHCPC_RENEW_STACKSIZE=4096
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_EXAMPLES_HELLO_STACKSIZE=8192
+CONFIG_EXAMPLES_NETTEST=y
+CONFIG_FSUTILS_PASSWD=y
+CONFIG_FSUTILS_PASSWD_READONLY=y
+CONFIG_FS_BINFS=y
+CONFIG_FS_HOSTFS=y
+CONFIG_FS_PROCFS=y
+CONFIG_FS_ROMFS=y
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_IOB_NOTIFIER=y
+CONFIG_LIBC_EXECFUNCS=y
+CONFIG_LIB_ENVPATH=y
+CONFIG_MAX_TASKS=64
+CONFIG_MM_FILL_ALLOCATIONS=y
+CONFIG_NET=y
+CONFIG_NETDB_DNSCLIENT=y
+CONFIG_NETDEV_IFINDEX=y
+CONFIG_NETDEV_PHY_IOCTL=y
+CONFIG_NETDOWN_NOTIFIER=y
+CONFIG_NET_ARP_SEND=y
+CONFIG_NET_BROADCAST=y
+CONFIG_NET_ICMP=y
+CONFIG_NET_ICMP_SOCKET=y
+CONFIG_NET_ICMPv6=y
+CONFIG_NET_ICMPv6_AUTOCONF=y
+CONFIG_NET_ICMPv6_NEIGHBOR=y
+CONFIG_NET_ICMPv6_ROUTER=y
+CONFIG_NET_ICMPv6_SOCKET=y
+CONFIG_NET_IPv6=y
+CONFIG_NET_LOCAL=y
+CONFIG_NET_PROMISCUOUS=y
+CONFIG_NET_SOCKOPTS=y
+CONFIG_NET_STATISTICS=y
+CONFIG_NET_TCP=y
+CONFIG_NET_TCP_NOTIFIER=y
+CONFIG_NET_TCP_WRITE_BUFFERS=y
+CONFIG_NET_UDP=y
+CONFIG_NET_UDP_NOTIFIER=y
+CONFIG_NFILE_DESCRIPTORS=32
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_ARCHROMFS=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_ROMFSDEVNO=1
+CONFIG_NSH_ROMFSETC=y
+CONFIG_PATH_INITIAL="/bin"
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=2048
+CONFIG_PTHREAD_STACK_DEFAULT=8192
+CONFIG_READLINE_TABCOMPLETION=y
+CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SCHED_LPWORKSTACKSIZE=4096
+CONFIG_SCHED_ONEXIT=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SIM_NETDEV_VPNKIT=y
+CONFIG_START_MONTH=6
+CONFIG_START_YEAR=2008
+CONFIG_STDIO_DISABLE_BUFFERING=y
+CONFIG_SYSLOG_CONSOLE=y
+CONFIG_SYSTEM_DHCPC_RENEW=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_NSH_STACKSIZE=4096
+CONFIG_SYSTEM_PING=y
+CONFIG_SYSTEM_PING_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_USER_ENTRYPOINT="nsh_main"