nc: show help text on bad parameters

[oweals/busybox.git] / networking / ip.c

diff --git a/networking/ip.c b/networking/ip.c
index d44cc0d6005ebc5322c77f18a27ee82014a1d5e1..7b1e2eb6ae28c424218f3419138f2e304abf5a90 100644 (file)
--- a/networking/ip.c
+++ b/networking/ip.c
@@ -1,60 +1,107 @@
+/* vi: set sw=4 ts=4: */
 /*
- * ip.c                "ip" utility frontend.
+ * "ip" utility frontend.
  *
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
- *
- * Authors:    Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  *
  * Changes:
- *
  * Rani Assaf <rani@magic.metawire.com> 980929:        resolve addresses
+ * Bernhard Reutner-Fischer rewrote to use index_in_substr_array
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <string.h>
+#include "libbb.h"
 
 #include "libiproute/utils.h"
 #include "libiproute/ip_common.h"
 
-#include "busybox.h"
+#if ENABLE_FEATURE_IP_ADDRESS \
+ || ENABLE_FEATURE_IP_ROUTE \
+ || ENABLE_FEATURE_IP_LINK \
+ || ENABLE_FEATURE_IP_TUNNEL \
+ || ENABLE_FEATURE_IP_RULE
 
-int ip_main(int argc, char **argv)
+static int FAST_FUNC ip_print_help(char **argv UNUSED_PARAM)
 {
-       int ret = EXIT_FAILURE;
+       bb_show_usage();
+}
 
-       ip_parse_common_args(&argc, &argv);
+typedef int FAST_FUNC (*ip_func_ptr_t)(char**);
+
+static int ip_do(ip_func_ptr_t ip_func, char **argv)
+{
+       argv = ip_parse_common_args(argv + 1);
+       return ip_func(argv);
+}
 
-       if (argc > 1) {
-#ifdef CONFIG_FEATURE_IP_ADDRESS
-               if (matches(argv[1], "address") == 0) {
-                       ret = do_ipaddr(argc-2, argv+2);
-               }
+#if ENABLE_FEATURE_IP_ADDRESS
+int ipaddr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ipaddr_main(int argc UNUSED_PARAM, char **argv)
+{
+       return ip_do(do_ipaddr, argv);
+}
 #endif
-#ifdef CONFIG_FEATURE_IP_ROUTE
-               if (matches(argv[1], "route") == 0) {
-                       ret = do_iproute(argc-2, argv+2);
-               }
+#if ENABLE_FEATURE_IP_LINK
+int iplink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int iplink_main(int argc UNUSED_PARAM, char **argv)
+{
+       return ip_do(do_iplink, argv);
+}
 #endif
-#ifdef CONFIG_FEATURE_IP_LINK
-               if (matches(argv[1], "link") == 0) {
-                       ret = do_iplink(argc-2, argv+2);
-               }
+#if ENABLE_FEATURE_IP_ROUTE
+int iproute_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int iproute_main(int argc UNUSED_PARAM, char **argv)
+{
+       return ip_do(do_iproute, argv);
+}
 #endif
-#ifdef CONFIG_FEATURE_IP_TUNNEL
-               if (matches(argv[1], "tunnel") == 0 || strcmp(argv[1], "tunl") == 0) {
-                       ret = do_iptunnel(argc-2, argv+2);
-               }
+#if ENABLE_FEATURE_IP_RULE
+int iprule_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int iprule_main(int argc UNUSED_PARAM, char **argv)
+{
+       return ip_do(do_iprule, argv);
+}
 #endif
-       }
-       if (ret) {
-               bb_show_usage();
-       }
-       return(EXIT_SUCCESS);
+#if ENABLE_FEATURE_IP_TUNNEL
+int iptunnel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int iptunnel_main(int argc UNUSED_PARAM, char **argv)
+{
+       return ip_do(do_iptunnel, argv);
 }
+#endif
+
+
+int ip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ip_main(int argc UNUSED_PARAM, char **argv)
+{
+       static const char keywords[] ALIGN1 =
+               IF_FEATURE_IP_ADDRESS("address\0")
+               IF_FEATURE_IP_ROUTE("route\0")
+               IF_FEATURE_IP_ROUTE("r\0")
+               IF_FEATURE_IP_LINK("link\0")
+               IF_FEATURE_IP_TUNNEL("tunnel\0")
+               IF_FEATURE_IP_TUNNEL("tunl\0")
+               IF_FEATURE_IP_RULE("rule\0")
+               ;
+       static const ip_func_ptr_t ip_func_ptrs[] = {
+               ip_print_help,
+               IF_FEATURE_IP_ADDRESS(do_ipaddr,)
+               IF_FEATURE_IP_ROUTE(do_iproute,)
+               IF_FEATURE_IP_ROUTE(do_iproute,)
+               IF_FEATURE_IP_LINK(do_iplink,)
+               IF_FEATURE_IP_TUNNEL(do_iptunnel,)
+               IF_FEATURE_IP_TUNNEL(do_iptunnel,)
+               IF_FEATURE_IP_RULE(do_iprule,)
+       };
+       ip_func_ptr_t ip_func;
+       int key;
+
+       argv = ip_parse_common_args(argv + 1);
+       key = *argv ? index_in_substrings(keywords, *argv++) : -1;
+       ip_func = ip_func_ptrs[key + 1];
+
+       return ip_func(argv);
+}
+
+#endif /* any of ENABLE_FEATURE_IP_xxx is 1 */