IPV6: ARCnet IPv6 support (2/2)

Hi,

IPv6 over ARCnet (RFC2497) support, IPv6 part.
Patch is against 2.5.69 and depends on the part 1, driver part.

I believe that this change is not harmful at all. However,
honestly speaking, since I don't have ARCnet hardware, I've never tested...

NOTE: I did not change MTU size while RFC says default MTU is 9072.

Index: include/net/if_inet6.h
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux25/include/net/if_inet6.h,v
retrieving revision 1.1.1.5
diff -u -r1.1.1.5 if_inet6.h
--- include/net/if_inet6.h	6 May 2003 12:44:09 -0000	1.1.1.5
+++ include/net/if_inet6.h	15 May 2003 18:41:24 -0000
@@ -264,5 +264,10 @@
 		buf[5]=0x00;
 	}
 }
+
+static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
+{
+	buf[0] = 0x00;
+}
 #endif
 #endif
Index: net/ipv6/addrconf.c
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux25/net/ipv6/addrconf.c,v
retrieving revision 1.1.1.13
diff -u -r1.1.1.13 addrconf.c
--- net/ipv6/addrconf.c	10 May 2003 15:49:16 -0000	1.1.1.13
+++ net/ipv6/addrconf.c	15 May 2003 18:41:27 -0000
@@ -32,6 +32,7 @@
  *						support.
  *	Yuji SEKIYA @USAGI		:	Don't assign a same IPv6
  *						address on a same interface.
+ *	YOSHIFUJI Hideaki @USAGI	:	ARCnet support
  */
 
 #include <linux/config.h>
@@ -44,6 +45,7 @@
 #include <linux/in6.h>
 #include <linux/netdevice.h>
 #include <linux/if_arp.h>
+#include <linux/if_arcnet.h>
 #include <linux/route.h>
 #include <linux/inetdevice.h>
 #include <linux/init.h>
@@ -1061,6 +1063,13 @@
 		eui[4] = 0xFE;
 		eui[0] ^= 2;
 		return 0;
+	case ARPHRD_ARCNET:
+		/* XXX: inherit EUI-64 fro mother interface -- yoshfuji */
+		if (dev->addr_len != ARCNET_ALEN)
+			return -1;
+		memset(eui, 0, 7);
+		eui[7] = *(u8*)dev->dev_addr;
+		return 0;
 	}
 	return -1;
 }
@@ -1732,7 +1741,8 @@
 
 	if ((dev->type != ARPHRD_ETHER) && 
 	    (dev->type != ARPHRD_FDDI) &&
-	    (dev->type != ARPHRD_IEEE802_TR)) {
+	    (dev->type != ARPHRD_IEEE802_TR) &&
+	    (dev->type != ARPHRD_ARCNET)) {
 		/* Alas, we support only Ethernet autoconfiguration. */
 		return;
 	}
@@ -2715,6 +2725,7 @@
 		case ARPHRD_ETHER:
 		case ARPHRD_FDDI:
 		case ARPHRD_IEEE802_TR:	
+		case ARPHRD_ARCNET:
 			addrconf_dev_config(dev);
 			break;
 		default:;
Index: net/ipv6/ndisc.c
===================================================================
RCS file: /cvsroot/usagi/usagi-backport/linux25/net/ipv6/ndisc.c,v
retrieving revision 1.1.1.12
diff -u -r1.1.1.12 ndisc.c
--- net/ipv6/ndisc.c	10 May 2003 15:49:16 -0000	1.1.1.12
+++ net/ipv6/ndisc.c	15 May 2003 18:41:27 -0000
@@ -232,6 +232,9 @@
 	case ARPHRD_IEEE802_TR:
 		ipv6_tr_mc_map(addr,buf);
 		return 0;
+	case ARPHRD_ARCNET:
+		ipv6_arcnet_mc_map(addr, buf);
+		return 0;
 	default:
 		if (dir) {
 			memcpy(buf, dev->broadcast, dev->addr_len);
-
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