Index: contrib/tcp_wrappers/scaffold.c
===================================================================
--- contrib/tcp_wrappers/scaffold.c
+++ contrib/tcp_wrappers/scaffold.c
@@ -235,16 +235,6 @@
     exit(0);
 }
 
-/* dummy function  to intercept the real rfc931() */
-
-/* ARGSUSED */
-
-void    rfc931(request)
-struct request_info *request;
-{
-    strcpy(request->user, unknown);
-}
-
 /* check_path - examine accessibility */
 
 int     check_path(path, st)
Index: contrib/tcp_wrappers/tcpd.h
===================================================================
--- contrib/tcp_wrappers/tcpd.h
+++ contrib/tcp_wrappers/tcpd.h
@@ -6,6 +6,12 @@
   * $FreeBSD$
   */
 
+#ifdef INET6
+#define	TCPD_SOCKADDR struct sockaddr
+#else
+#define	TCPD_SOCKADDR struct sockaddr_in
+#endif
+
 /* Structure to describe one communications endpoint. */
 
 #define	STRING_LENGTH	128		/* hosts, users, processes */
@@ -13,11 +19,7 @@
 struct host_info {
     char    name[STRING_LENGTH];	/* access via eval_hostname(host) */
     char    addr[STRING_LENGTH];	/* access via eval_hostaddr(host) */
-#ifdef INET6
-    struct sockaddr *sin;		/* socket address or 0 */
-#else
-    struct sockaddr_in *sin;		/* socket address or 0 */
-#endif
+    TCPD_SOCKADDR *sin;			/* socket address or 0 */
     struct t_unitdata *unit;		/* TLI transport address or 0 */
     struct request_info *request;	/* for shared information */
 };
@@ -67,21 +69,22 @@
 /* Global functions. */
 
 #if defined(TLI) || defined(PTX) || defined(TLI_SEQUENT)
-extern void fromhost();			/* get/validate client host info */
+extern void fromhost __P((struct request_info *));	/* get/validate client host info */
 #else
 #define	fromhost sock_host		/* no TLI support needed */
 #endif
 
-extern int hosts_access();		/* access control */
-extern int hosts_ctl();			/* wrapper around request_init() */
-extern void shell_cmd();		/* execute shell command */
-extern char *percent_x();		/* do %<char> expansion */
-extern void rfc931();			/* client name from RFC 931 daemon */
-extern void clean_exit();		/* clean up and exit */
-extern void refuse();			/* clean up and exit */
-extern char *xgets();			/* fgets() on steroids */
-extern char *split_at();		/* strchr() and split */
-extern unsigned long dot_quad_addr();	/* restricted inet_addr() */
+extern int hosts_access __P((struct request_info *));				/* access control */
+extern int hosts_ctl __P((char *, char *, char *, char *));			/* wrapper around request_init() */
+extern void shell_cmd __P((char *));						/* execute shell command */
+extern char *percent_x __P((char *, int, char *, struct request_info *));	/* do %<char> expansion */
+extern void rfc931 __P((TCPD_SOCKADDR *, TCPD_SOCKADDR *, char *));		/* client name from RFC 931 daemon */
+extern void clean_exit __P((struct request_info *));				/* clean up and exit */
+extern void refuse __P((struct request_info *));				/* clean up and exit */
+extern char *xgets __P((char *, int, FILE *));					/* fgets() on steroids */
+
+extern char *split_at __P((char *, int));					/* strchr() and split */
+extern unsigned long dot_quad_addr __P((char *));				/* restricted inet_addr() */
 
 /* Global variables. */
 
@@ -98,13 +101,8 @@
   * attributes. Each attribute has its own key.
   */
 
-#ifdef __STDC__
-extern struct request_info *request_init(struct request_info *,...);
-extern struct request_info *request_set(struct request_info *,...);
-#else
-extern struct request_info *request_init();	/* initialize request */
-extern struct request_info *request_set();	/* update request structure */
-#endif
+extern struct request_info *request_init __P((struct request_info *,...));	/* initialize request */
+extern struct request_info *request_set __P((struct request_info *,...));	/* update request structure */
 
 #define	RQ_FILE		1		/* file descriptor */
 #define	RQ_DAEMON	2		/* server process (argv[0]) */
@@ -124,27 +122,27 @@
   * host_info structures serve as caches for the lookup results.
   */
 
-extern char *eval_user();		/* client user */
-extern char *eval_hostname();		/* printable hostname */
-extern char *eval_hostaddr();		/* printable host address */
-extern char *eval_hostinfo();		/* host name or address */
-extern char *eval_client();		/* whatever is available */
-extern char *eval_server();		/* whatever is available */
+extern char *eval_user __P((struct request_info *));		/* client user */
+extern char *eval_hostname __P((struct host_info *));		/* printable hostname */
+extern char *eval_hostaddr __P((struct host_info *));		/* printable host address */
+extern char *eval_hostinfo __P((struct host_info *));		/* host name or address */
+extern char *eval_client __P((struct request_info *));		/* whatever is available */
+extern char *eval_server __P((struct request_info *));		/* whatever is available */
 #define	eval_daemon(r)	((r)->daemon)	/* daemon process name */
 #define	eval_pid(r)	((r)->pid)	/* process id */
 
 /* Socket-specific methods, including DNS hostname lookups. */
 
-extern void sock_host();		/* look up endpoint addresses */
-extern void sock_hostname();		/* translate address to hostname */
-extern void sock_hostaddr();		/* address to printable address */
+extern void sock_host __P((struct request_info *));		/* look up endpoint addresses */
+extern void sock_hostname __P((struct host_info *));		/* translate address to hostname */
+extern void sock_hostaddr __P((struct host_info *));		/* address to printable address */
 #define	sock_methods(r) \
 	{ (r)->hostname = sock_hostname; (r)->hostaddr = sock_hostaddr; }
 
 /* The System V Transport-Level Interface (TLI) interface. */
 
 #if defined(TLI) || defined(PTX) || defined(TLI_SEQUENT)
-extern void tli_host();			/* look up endpoint addresses etc. */
+extern void tli_host __P((struct request_info *));		/* look up endpoint addresses etc. */
 #endif
 
  /*
@@ -153,13 +151,8 @@
   * everyone would have to include <setjmp.h>.
   */
 
-#ifdef __STDC__
-extern void tcpd_warn(char *, ...);	/* report problem and proceed */
-extern void tcpd_jump(char *, ...);	/* report problem and jump */
-#else
-extern void tcpd_warn();
-extern void tcpd_jump();
-#endif
+extern void tcpd_warn __P((char *, ...));	/* report problem and proceed */
+extern void tcpd_jump __P((char *, ...));	/* report problem and jump */
 
 struct tcpd_context {
     char   *file;			/* current file */
@@ -185,42 +178,42 @@
   * behavior.
   */
 
-extern void process_options();		/* execute options */
-extern int dry_run;			/* verification flag */
+extern void process_options __P((char *, struct request_info *));	/* execute options */
+extern int dry_run;							/* verification flag */
 
 /* Bug workarounds. */
 
 #ifdef INET_ADDR_BUG			/* inet_addr() returns struct */
 #define	inet_addr fix_inet_addr
-extern long fix_inet_addr();
+extern long fix_inet_addr __P((char *));
 #endif
 
 #ifdef BROKEN_FGETS			/* partial reads from sockets */
 #define	fgets fix_fgets
-extern char *fix_fgets();
+extern char *fix_fgets __P((char *, int, FILE *));
 #endif
 
 #ifdef RECVFROM_BUG			/* no address family info */
 #define	recvfrom fix_recvfrom
-extern int fix_recvfrom();
+extern int fix_recvfrom __P((int, char *, int, int, struct sockaddr *, int *));
 #endif
 
 #ifdef GETPEERNAME_BUG			/* claims success with UDP */
 #define	getpeername fix_getpeername
-extern int fix_getpeername();
+extern int fix_getpeername __P((int, struct sockaddr *, int *));
 #endif
 
 #ifdef SOLARIS_24_GETHOSTBYNAME_BUG	/* lists addresses as aliases */
 #define	gethostbyname fix_gethostbyname
-extern struct hostent *fix_gethostbyname();
+extern struct hostent *fix_gethostbyname __P((char *));
 #endif
 
 #ifdef USE_STRSEP			/* libc calls strtok() */
 #define	strtok	fix_strtok
-extern char *fix_strtok();
+extern char *fix_strtok __P((char *, char *));
 #endif
 
 #ifdef LIBC_CALLS_STRTOK		/* libc calls strtok() */
 #define	strtok	my_strtok
-extern char *my_strtok();
+extern char *my_strtok __P((char *, char *));
 #endif