af.h/c: make several structs const

Author: krajaratnam

addrtoname.c

@@ -768,7 +768,7 @@ init_protoidarray(void)
 {
 	register int i;
 	register struct protoidmem *tp;
-	struct protoidlist *pl;
+	const struct protoidlist *pl;
 	u_char protoid[5];
 
 	protoid[0] = 0;
@@ -817,7 +817,7 @@ static const struct etherlist {
 static void
 init_etherarray(void)
 {
-	register struct etherlist *el;
+	register const struct etherlist *el;
 	register struct enamemem *tp;
 #ifdef USE_ETHER_NTOHOST
 	char name[256];

af.c

@@ -28,7 +28,7 @@ static const char rcsid[] _U_ =
 #include "interface.h"
 #include "af.h"
 
-struct tok af_values[] = {
+const struct tok af_values[] = {
     { 0,                      "Reserved"},
     { AFNUM_INET,             "IPv4"},
     { AFNUM_INET6,            "IPv6"},
@@ -50,7 +50,7 @@ struct tok af_values[] = {
     { 0, NULL},
 };
 
-struct tok bsd_af_values[] = {
+const struct tok bsd_af_values[] = {
     { BSD_AFNUM_INET, "IPv4" },
     { BSD_AFNUM_NS, "NS" },
     { BSD_AFNUM_ISO, "ISO" },

af.h

@@ -17,8 +17,8 @@
  * Original code by Hannes Gredler ([email protected])
  */
 
-extern struct tok af_values[];
-extern struct tok bsd_af_values[];
+extern const struct tok af_values[];
+extern const struct tok bsd_af_values[];
 
 /* RFC1700 address family numbers */
 #define AFNUM_INET	1