[lotest] Add loopback testing commands

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/hci/commands/lotest_cmd.c

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/command.h>
+#include <ipxe/if_ether.h>
+#include <usr/lotest.h>
+
+/** @file
+ *
+ * Loopback testing commands
+ *
+ */
+
+static void lotest_syntax ( char **argv ) {
+	printf ( "Usage:\n  %s <sending interface> <receiving interface>\n",
+		 argv[0] );
+}
+
+static int lotest_exec ( int argc, char **argv ) {
+	static struct option lotest_opts[] = {
+		{ "help", 0, NULL, 'h' },
+		{ "mtu", required_argument, NULL, 'm' },
+		{ NULL, 0, NULL, 0 },
+	};
+	const char *sender_name;
+	const char *receiver_name;
+	const char *mtu_text = NULL;
+	struct net_device *sender;
+	struct net_device *receiver;
+	char *endp;
+	size_t mtu;
+	int c;
+	int rc;
+
+	/* Parse command line */
+	while ( ( c = getopt_long ( argc, argv, "hm:", lotest_opts,
+				    NULL ) ) >= 0 ) {
+		switch ( c ) {
+		case 'm':
+			mtu_text = optarg;
+			break;
+		case 'h':
+			/* Display help text */
+		default:
+			/* Unrecognised/invalid option */
+			lotest_syntax ( argv );
+			return 1;
+		}
+	}
+	if ( optind != ( argc - 2 ) ) {
+		lotest_syntax ( argv );
+		return 1;
+	}
+	sender_name = argv[optind];
+	receiver_name = argv[optind + 1];
+
+	/* Identify network devices */
+	sender = find_netdev ( sender_name );
+	if ( ! sender ) {
+		printf ( "%s: no such interface\n", sender_name );
+		return 1;
+	}
+	receiver = find_netdev ( receiver_name );
+	if ( ! receiver ) {
+		printf ( "%s: no such interface\n", receiver_name );
+		return 1;
+	}
+
+	/* Identify MTU */
+	if ( mtu_text ) {
+		mtu = strtoul ( mtu_text, &endp, 10 );
+		if ( *endp ) {
+			printf ( "%s: invalid MTU\n", mtu_text );
+			return 1;
+		}
+	} else {
+		mtu = ETH_MAX_MTU;
+	}
+
+	/* Perform loopback test */
+	if ( ( rc = loopback_test ( sender, receiver, mtu ) ) != 0 ) {
+		printf ( "Test failed: %s\n", strerror ( rc ) );
+		return 1;
+	}
+
+	return 0;
+}
+
+struct command lotest_command __command = {
+	.name = "lotest",
+	.exec = lotest_exec,
+};