[PATCH] accept ARP's with HW Type of 1 from IEEE802 devices

[Noah Romer <nromer@xxxxxxxx>]

Patch against linux/net/ipv4/arp.c to accept ARP's with HW Type of 1 from
IEEE802 devices (specifically, Fibre Channel devices). This has been tested
with linux-2.4.0-test9 and linux-2.4.0-test12.

---
diff -u arp.c~ arp.c
--- arp.c~      Tue Oct  3 09:24:41 2000
+++ arp.c       Wed Dec 20 16:05:36 2000
@@ -647,6 +647,20 @@
                        goto out;
                break;
 #endif
+#ifdef CONFIG_NET_FC
+       case ARPHRD_IEEE802:
+               /*
+                * According to RFC 2625, Fibre Channel devices (which are IEEE
+                * 802 devices) should accept ARP hardware types of 6 (IEEE
802)
+                * and 1 (Ethernet).
+                */
+               if (arp->ar_hrd != __constant_htons(ARPHRD_ETHER) &&
+                   arp->ar_hrd != __constant_htons(ARPHRD_IEEE802))
+                       goto out;
+               if (arp->ar_pro != __constant_htons(ETH_P_IP))
+                       goto out;
+               break;
+#endif
 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
        case ARPHRD_AX25:
                if (arp->ar_pro != __constant_htons(AX25_P_IP))