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authorGuy Harris <guy@alum.mit.edu>2001-01-10 09:34:08 +0000
committerGuy Harris <guy@alum.mit.edu>2001-01-10 09:34:08 +0000
commitaf77e6119979d996c97571f33dce61353439a9d1 (patch)
treed10df1aeefe5d87b528c1d4d587587e5e7a0723e /ppptypes.h
parent47b04baac4af81514341f0a01e1e93758684589f (diff)
Update a comment.
svn path=/trunk/; revision=2856
Diffstat (limited to 'ppptypes.h')
-rw-r--r--ppptypes.h17
1 files changed, 12 insertions, 5 deletions
diff --git a/ppptypes.h b/ppptypes.h
index bf4ea5fd9b..ba9083ea3a 100644
--- a/ppptypes.h
+++ b/ppptypes.h
@@ -1,7 +1,7 @@
/* ppptypes.h
* Defines PPP packet types.
*
- * $Id: ppptypes.h,v 1.3 2001/01/10 09:07:35 guy Exp $
+ * $Id: ppptypes.h,v 1.4 2001/01/10 09:34:08 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
@@ -73,14 +73,21 @@
* Protocol types for the Cisco HDLC format.
*
* As per the above, according to RFC 1547, these are "standard 16 bit
- * Ethernet protocol type code[s]", but 0x8035 is Reverse ARP, so, unless
- * Cisco SLARP looks just like Reverse ARP, that's not quite true.
+ * Ethernet protocol type code[s]", but 0x8035 is Reverse ARP, and
+ * that is (at least according to the Linux ISDN code) not the
+ * same as Cisco SLARP.
+ *
* In addition, 0x2000 is apparently the Cisco Discovery Protocol, but
* on Ethernet those are encapsulated inside SNAP with an OUI of
* OUI_CISCO, not OUI_ENCAP_ETHER.
*
- * If it *is* true, that'd be lovely, as we could just use
- * "ethertype()" to handle Cisco HDLC.
+ * Perhaps we should set up a protocol table for those protocols
+ * that differ between Ethernet and Cisco HDLC, and have the PPP
+ * code first try that table and, if it finds nothing in that
+ * table, call "ethertype()". (Unfortunately, that means that -
+ * assuming we had a Cisco SLARP dissector - said dissector were
+ * disabled, SLARP packets would be dissected as Reverse ARP
+ * packets, not as data.
*/
#define CISCO_SLARP 0x8035 /* Cisco SLARP protocol */