Enable ether name resolution for packet summary lines of IPX packets

(in the src/dst of the CList). In order to do this, I had to:

1. Add a new function, ether_to_str_punct(const guint8*, char) which
	turns a 6-byt ether address into a string, using whatever punctuation
	is passed as the char. If a null char is passed, no separator
	is put between the hex digits. Unresolved IPX addresses look better
	with the ether portion having no punctuation (IMHO)

2. Changed ether_to_str() to call ether_to_str_punct with ':' as the char
	argument. That is, code abstraction.

3. MAXNAMELEN was moved from resolv.c to resolv.h so that packet-ipx.c
	could see it.

4. A new resolve function, get_ether_name_if_known(), returns the resolved name
	of an ether address, or NULL if there is none.  This differs
	from get_ether_name() by returning NULL rather than a text version
	of the ether address.

svn path=/trunk/; revision=1076

1 files changed, 8 insertions, 1 deletions

diff --git a/resolv.h b/resolv.h
index 9453449981..c2406ab250 100644
--- a/resolv.h
+++ b/resolv.h
@@ -1,7 +1,7 @@
 /* resolv.h
  * Definitions for network object lookup
  *
- * $Id: resolv.h,v 1.9 1999/10/22 07:17:51 guy Exp $
+ * $Id: resolv.h,v 1.10 1999/11/20 05:35:15 gram Exp $
  *
  * Laurent Deniel <deniel@worldnet.fr>
  *
@@ -36,6 +36,10 @@
 #define EPATH_MANUF  		DATAFILE_DIR "/manuf"
 #define EPATH_PERSONAL_ETHERS 	".ethereal/ethers" /* with "$HOME/" prefix */
 
+#ifndef MAXNAMELEN
+#define MAXNAMELEN  	64	/* max name length (hostname and port name) */
+#endif
+
 /* global variables */
 
 extern gchar *g_ethers_path;
@@ -62,6 +66,9 @@ gchar* get_hostname6(struct e_in6_addr *ad);
    "%02x:%02x:%02x:%02x:%02x:%02x" */
 extern u_char *get_ether_name(const u_char *addr);
 
+/* get_ether_name returns the logical name if found in ethers files else NULL */
+extern u_char *get_ether_name_if_known(const u_char *addr);
+
 /* get_manuf_name returns the vendor name or "%02x:%02x:%02x" if not known */
 extern u_char *get_manuf_name(u_char *addr);