NSH Library: Add a route command that will dump the content of routing table.

nshlib/Kconfig

@@ -195,6 +195,7 @@ config NSH_DISABLE_ADDROUTE
 	bool "Disable addroute"
 	default y if DEFAULT_SMALL
 	default n if !DEFAULT_SMALL
+	depends on NET_ROUTE
 
 config NSH_DISABLE_ARP
 	bool "Disable arp"
@@ -255,6 +256,7 @@ config NSH_DISABLE_DELROUTE
 	bool "Disable delroute"
 	default y if DEFAULT_SMALL
 	default n if !DEFAULT_SMALL
+	depends on NET_ROUTE
 
 config NSH_DISABLE_DIRNAME
 	bool "Disable dirname"
@@ -456,6 +458,12 @@ config NSH_DISABLE_RMDIR
 	bool "Disable rmdir"
 	default n
 
+config NSH_DISABLE_ROUTE
+	bool "Disable delroute"
+	depends on FS_PROCFS && NET_ROUTE && !FS_PROCFS_EXCLUDE_NET && !FS_PROCFS_EXCLUDE_ROUTE
+	default y if DEFAULT_SMALL
+	default n if !DEFAULT_SMALL
+
 config NSH_DISABLE_SET
 	bool "Disable set"
 	default n

nshlib/nsh.h

@@ -183,6 +183,17 @@
 #  define CONFIG_NSH_DISABLE_GET 1
 #endif
 
+/* Route depends on routing table support and procfs support */
+
+#if !defined(CONFIG_FS_PROCFS) || defined(CONFIG_FS_PROCFS_EXCLUDE_NET) || \
+    defined(CONFIG_FS_PROCFS_EXCLUDE_ROUTE) || !defined(CONFIG_NET_ROUTE) || \
+    defined(CONFIG_NSH_DISABLE_ROUTE) || \
+    (!defined(CONFIG_NET_IPv4) && !defined(CONFIG_NET_IPv6))
+#  ifndef CONFIG_FS_PROCFS_EXCLUDE_ROUTE
+#    define CONFIG_FS_PROCFS_EXCLUDE_ROUTE 1
+#  endif
+#endif
+
 /* wget depends on web client support */
 
 #ifndef CONFIG_NETUTILS_WEBCLIENT
@@ -1187,6 +1198,9 @@ int cmd_lsmod(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
         int cmd_wget(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #    endif
 #  endif
+#  ifndef CONFIG_FS_PROCFS_EXCLUDE_ROUTE
+      int cmd_route(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#  endif
 #  if defined(CONFIG_NSH_TELNET)
 #    ifndef CONFIG_NSH_DISABLE_TELNETD
         int cmd_telnetd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);

nshlib/nsh_command.c

@@ -436,6 +436,16 @@ static const struct cmdmap_s g_cmdmap[] =
   { "rmmod",    cmd_rmmod,    2, 2, "<module-name>" },
 #endif
 
+#ifndef CONFIG_FS_PROCFS_EXCLUDE_ROUTE
+#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
+  { "route",    cmd_route,    2, 2, "ipv4|ipv6" },
+#elif defined(CONFIG_NET_IPv4)
+  { "route",    cmd_route,    1, 2, "[ipv4]" },
+#elif defined(CONFIG_NET_IPv6)
+  { "route",    cmd_route,    1, 2, "[ipv6]" },
+#endif
+#endif
+
 #ifndef CONFIG_NSH_DISABLE_SET
 #  if !defined(CONFIG_DISABLE_ENVIRON) && !defined(CONFIG_NSH_DISABLESCRIPT)
   { "set",      cmd_set,      2, 4, "[{+|-}{e|x|xe|ex}] [<name> <value>]" },

nshlib/nsh_routecmds.c

@@ -632,18 +632,73 @@ errout:
 /****************************************************************************
  * Name: cmd_route
  *
- * nsh> route
+ * nsh> route <ipv4|ipv6>
  *
  ****************************************************************************/
 
-#if !defined(CONFIG_NSH_DISABLE_DELROUTE) && \
-    !defined(CONFIG_BUILD_PROTECTED) && \
-    !defined(CONFIG_BUILD_KERNEL)
+#ifndef CONFIG_FS_PROCFS_EXCLUDE_ROUTE
+int cmd_route(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
+  bool ipv6 = false;
+#endif
 
-/* Perhaps... someday.  This would current depend on using the internal
- * OS interface net_foreachroute and internal OS data structures defined
- * in nuttx/net/net_route.h
- */
-#endif /* !CONFIG_NSH_DISABLE_DELROUTE && !CONFIG_BUILD_PROTECTED && !CONFIG_BUILD_KERNEL */
+  /* If both IPv4 and IPv6 and defined then there will be exactly one
+   * argument.  Otherwise no arguments are required, but an addition
+   * argument is accepted.
+   */
+
+#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
+  if (strcmp(argv[1], "ipv4") == 0)
+    {
+      ipv6 = false;
+    }
+  else if (strcmp(argv[1], "ipv6") == 0)
+    {
+      ipv6 = true;
+    }
+
+  else
+    {
+      nsh_output(vtbl, g_fmtarginvalid, argv[0]);
+      return ERROR;
+    }
+#elif defined(CONFIG_NET_IPv4)
+  if (argc == 2 && strcmp(argv[1], "ipv4") != 0)
+    {
+      nsh_output(vtbl, g_fmtarginvalid, argv[0]);
+      return ERROR;
+    }
+#else
+  if (argc == 2 && strcmp(argv[1], "ipv6") != 0)
+    {
+      nsh_output(vtbl, g_fmtarginvalid, argv[0]);
+      return ERROR;
+    }
+#endif
+
+  /* Then just cat the procfs file containing the routing table info */
+
+#ifdef CONFIG_NET_IPv4
+#ifdef CONFIG_NET_IPv6
+  if (!ipv6)
+#endif
+    {
+      return nsh_catfile(vtbl, argv[0], "/proc/net/route/ipv4");
+    }
+#endif
+
+#ifdef CONFIG_NET_IPv6
+#ifdef CONFIG_NET_IPv4
+  else
+#endif
+    {
+      return nsh_catfile(vtbl, argv[0], "/proc/net/route/ipv6");
+    }
+#endif
+
+  return ERROR; /* Shouldn't get here */
+}
+#endif
 
 #endif /* CONFIG_NET && CONFIG_NET_ROUTE */