netdev - [PATCH 01/01] iproute2-2.6.23: RFC4214 Support (v2.5)

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Date:	Mon, 26 Nov 2007 09:20:07 -0800
From:	"Templin, Fred L" <Fred.L.Templin@...ing.com>
To:	<netdev@...r.kernel.org>
Cc:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>,
	"Vlad Yasevich" <vladislav.yasevich@...com>,
	"Stephane Bortzmeyer" <bortzmeyer@....fr>,
	"David Miller" <davem@...emloft.net>
Subject: [PATCH 01/01] iproute2-2.6.23: RFC4214 Support (v2.5)

From: Fred L. Templin <fred.l.templin@...ing.com>

This patch includes support for the Intra-Site Automatic Tunnel
Addressing Protocol (ISATAP) per RFC4214.

The following diffs are specific to the iproute2-2.6.23
software distribution. This message includes the full and
patchable diff text; please use this version to apply patches.

Signed-off-by: Fred L. Templin <fred.l.templin@...ing.com>

---
 
--- iproute2-2.6.23/ip/iptunnel.c.orig	2007-11-08 16:27:24.000000000 -0800
+++ iproute2-2.6.23/ip/iptunnel.c	2007-11-19 05:57:47.000000000 -0800
@@ -39,7 +39,7 @@ static void usage(void) __attribute__((n
 static void usage(void)
 {
 	fprintf(stderr, "Usage: ip tunnel { add | change | del | show } [ NAME ]\n");
-	fprintf(stderr, "          [ mode { ipip | gre | sit } ] [ remote ADDR ] [ local ADDR ]\n");
+	fprintf(stderr, "          [ mode { ipip | gre | sit | isatap } ] [ remote ADDR ] [ local ADDR ]\n");
 	fprintf(stderr, "          [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
 	fprintf(stderr, "          [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
 	fprintf(stderr, "\n");
@@ -55,6 +55,7 @@ static int parse_args(int argc, char **a
 {
 	int count = 0;
 	char medium[IFNAMSIZ];
+	int isatap = 0;
 
 	memset(p, 0, sizeof(*p));
 	memset(&medium, 0, sizeof(medium));
@@ -90,6 +91,13 @@ static int parse_args(int argc, char **a
 					exit(-1);
 				}
 				p->iph.protocol = IPPROTO_IPV6;
+			} else if (strcmp(*argv, "isatap") == 0) {
+				if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
+					fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
+					exit(-1);
+				}
+				p->iph.protocol = IPPROTO_IPV6;
+				isatap++;
 			} else {
 				fprintf(stderr,"Cannot guess tunnel mode.\n");
 				exit(-1);
@@ -212,6 +220,10 @@ static int parse_args(int argc, char **a
 			p->iph.protocol = IPPROTO_IPIP;
 		else if (memcmp(p->name, "sit", 3) == 0)
 			p->iph.protocol = IPPROTO_IPV6;
+		else if (memcmp(p->name, "isatap", 6) == 0) {
+			p->iph.protocol = IPPROTO_IPV6;
+			isatap++;
+		}
 	}
 
 	if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
@@ -239,6 +251,14 @@ static int parse_args(int argc, char **a
 		fprintf(stderr, "Broadcast tunnel requires a source address.\n");
 		return -1;
 	}
+	if (isatap) {
+		if (p->iph.daddr) {
+			fprintf(stderr, "no remote with isatap.\n");
+			return -1;
+		}
+		p->i_flags |= SIT_ISATAP;
+	}
+
 	return 0;
 }
-
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