From d776dd5fbd484acdf00f6df55583e9aa53226859 Mon Sep 17 00:00:00 2001 From: Denny Page Date: Sat, 13 Apr 2024 10:16:08 -0700 Subject: [PATCH] Support ARP for 802 networks This is used by 802.3 Ethernet. (Also be used by 802.4 Token Bus and 802.5 Token Ring, but we don't support those.) This was accidentally removed along with FDDI support in commit 0437c8e3b198, presumably because comments implied it was used only by FDDI or Token Ring. Fixes: 0437c8e3b198 ("Remove support for FDDI networks.") Reviewed-by: emaste Signed-off-by: Denny Page Pull-request: https://github.com/freebsd/freebsd-src/pull/1166 (cherry picked from commit fcdf9a19893b9b5beb7a21407de507f0ae4c500b) --- sys/net/if_arp.h | 2 +- sys/netinet/if_ether.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/net/if_arp.h b/sys/net/if_arp.h index 0319807dbfd..f201fd67cab 100644 --- a/sys/net/if_arp.h +++ b/sys/net/if_arp.h @@ -47,7 +47,7 @@ struct arphdr { u_short ar_hrd; /* format of hardware address */ #define ARPHRD_ETHER 1 /* ethernet hardware format */ -#define ARPHRD_IEEE802 6 /* token-ring hardware format */ +#define ARPHRD_IEEE802 6 /* 802.2 networks (ethernet/tb/tr) */ #define ARPHRD_FRELAY 15 /* frame relay hardware format */ #define ARPHRD_IEEE1394 24 /* firewire hardware format */ #define ARPHRD_INFINIBAND 32 /* infiniband hardware format */ diff --git a/sys/netinet/if_ether.c b/sys/netinet/if_ether.c index df564b210f9..a14671528f1 100644 --- a/sys/netinet/if_ether.c +++ b/sys/netinet/if_ether.c @@ -684,6 +684,10 @@ arpintr(struct mbuf *m) hlen = ETHER_ADDR_LEN; /* RFC 826 */ layer = "ethernet"; break; + case ARPHRD_IEEE802: + hlen = ETHER_ADDR_LEN; + layer = "ieee802"; + break; case ARPHRD_INFINIBAND: hlen = 20; /* RFC 4391, INFINIBAND_ALEN */ layer = "infiniband";