LINKTYPE_ARCNET doesn't have standard ARCNET headers, it has headers as

munged by BSD, with the Information Length field and the second byte of
the Destination Identifier field dropped; call it LINKTYPE_ARCNET_BSD.
(Don't change the DLT_ name, for backwards compatibility.)

diff --git a/pcap-common.c b/pcap-common.c
index 97488f12cd1944c9b5a60b6f27082e4690572c13..8aa6c4ab7f130152494ad2933ef59405f9aef151 100644 (file)
--- a/pcap-common.c
+++ b/pcap-common.c
@@ -114,7 +114,7 @@ static const char rcsid[] _U_ =
 #define LINKTYPE_PRONET                DLT_PRONET
 #define LINKTYPE_CHAOS         DLT_CHAOS
 #define LINKTYPE_TOKEN_RING    DLT_IEEE802     /* DLT_IEEE802 is used for Token Ring */
-#define LINKTYPE_ARCNET                DLT_ARCNET      /* BSD-style headers */
+#define LINKTYPE_ARCNET_BSD    DLT_ARCNET      /* BSD-style headers */
 #define LINKTYPE_SLIP          DLT_SLIP
 #define LINKTYPE_PPP           DLT_PPP
 #define LINKTYPE_FDDI          DLT_FDDI
@@ -788,7 +788,7 @@ static struct linktype_map {
        { DLT_PRONET,           LINKTYPE_PRONET },
        { DLT_CHAOS,            LINKTYPE_CHAOS },
        { DLT_IEEE802,          LINKTYPE_TOKEN_RING },
-       { DLT_ARCNET,           LINKTYPE_ARCNET },
+       { DLT_ARCNET,           LINKTYPE_ARCNET_BSD },
        { DLT_SLIP,             LINKTYPE_SLIP },
        { DLT_PPP,              LINKTYPE_PPP },
        { DLT_FDDI,             LINKTYPE_FDDI },