1 files changed, 79 insertions, 0 deletions
diff --git a/src/nl-classid-lookup.c b/src/nl-classid-lookup.c
new file mode 100644
index 0000000..faa65dd
--- /dev/null
+++ b/src/nl-classid-lookup.c
@@ -0,0 +1,79 @@
+/*
+ * src/nl-classid-lookup.c     Lookup classid
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation version 2.1
+ *	of the License.
+ *
+ * Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
+ */
+
+#include <netlink/cli/utils.h>
+
+static void print_usage(void)
+{
+	printf(
+"Usage: nl-classid-lookup [OPTIONS]... NAME\n"
+"\n"
+"OPTIONS\n"
+" -h, --help                Show this help text.\n"
+" -v, --version             Show versioning information.\n"
+" -r, --reverse             Do a reverse lookup, i.e. classid to name.\n"
+"\n"
+"EXAMPLE\n"
+"   $ nl-classid-lookup low_latency\n"
+"   $ nl-classid-lookup -r 1:12\n"
+"\n"
+	);
+	exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+	uint32_t classid;
+	char *name;
+	int err, reverse = 0;
+
+	for (;;) {
+		int c, optidx = 0;
+		static struct option long_opts[] = {
+			{ "help", 0, 0, 'h' },
+			{ "version", 0, 0, 'v' },
+			{ "reverse", 0, 0, 'r' },
+			{ 0, 0, 0, 0 }
+		};
+	
+		c = getopt_long(argc, argv, "hvr", long_opts, &optidx);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h': print_usage(); break;
+		case 'v': nl_cli_print_version(); break;
+		case 'r': reverse = 1; break;
+		}
+ 	}
+
+	if (optind >= argc)
+		print_usage();
+
+	name = argv[optind++];
+
+	/*
+	 * We use rtnl_tc_str2handle() even while doing a reverse lookup. This
+	 * allows for name -> name lookups. This is intentional, it does not
+	 * do any harm and avoids duplicating a lot of code.
+	 */
+	if ((err = rtnl_tc_str2handle(name, &classid)) < 0)
+		nl_cli_fatal(err, "Unable to lookup classid \"%s\": %s",
+			     name, nl_geterror(err));
+
+	if (reverse) {
+		char buf[64];
+		printf("%s\n", rtnl_tc_handle2str(classid, buf, sizeof(buf)));
+	} else
+		printf("%x:%x\n", TC_H_MAJ(classid) >> 16, TC_H_MIN(classid));
+
+	return 0;
+}