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List:       busybox
Subject:    [BusyBox] Add interface selection to ping6
From:       Bart Visscher <magick () Linux-Fan ! com>
Date:       2002-04-28 9:09:04
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Changelog:
* Add interface selection to ping6

Remark:
It is sometimes usefull to specify the interface when the routes aren't setup
correctly.

["11-ping6-interface-select.patch" (text/x-patch)]

diff -ru -X exclude -P busybox-new-2/networking/ping6.c busybox-new-0/networking/ping6.c
--- busybox-new-2/networking/ping6.c	Thu Apr 25 21:15:14 2002
+++ busybox-new-0/networking/ping6.c	Thu Apr 25 21:27:13 2002
@@ -146,6 +146,7 @@
 static struct sockaddr_in6 pingaddr;
 static int pingsock = -1;
 static int datalen; /* intentionally uninitialized to work around gcc bug */
+static char* ifname;
 
 static long ntransmitted, nreceived, nrepeats, pingcount;
 static int myid, options;
@@ -364,6 +365,11 @@
 	setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
 			   sizeof(sockopt));
 
+	if (ifname) {
+		if ((pingaddr.sin6_scope_id = if_nametoindex(ifname)) == 0)
+			error_msg_and_die("%s: invalid interface name", ifname);
+	}
+
 	printf("PING %s (%s): %d data bytes\n",
 	           hostent->h_name,
 			   inet_ntop(AF_INET6, (struct in_addr6 *) &pingaddr.sin6_addr,
@@ -442,6 +448,12 @@
 			        show_usage();
 			argv++;
 			datalen = atoi(*argv);
+			break;
+		case 'I':
+			if (--argc <= 0)
+			        show_usage();
+			argv++;
+			ifname = *argv;
 			break;
 		default:
 			show_usage();

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