expansion */
extern void rfc931 __P((struct sockaddr_gen *, struct sockaddr_gen *, 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() */
extern unsigned long prefix_to_netmask __P((char *)); /* 0-32 prefix length */
extern int numeric_addr __P((char *, union gen_addr *, int *, int *)); /* IP4/IP6 inet_addr (restricted) */
extern struct hostent *tcpd_gethostbyname __P((char *, int));
/* IP4/IP6 gethostbyname */
#ifdef HAVE_IPV6
extern char *skip_ipv6_addrs __P((char *)); /* skip over colons in IPv6 addrs */
#else
#define skip_ipv6_addrs(x) x
#endif
/* Global variables. */
#ifdef HAVE_WEAKSYMS
extern int allow_severity __attribute__ ((weak)); /* for connection logging */
extern int deny_severity __attribute__ ((weak)); /* for connection logging */
#else
extern int allow_severity; /* for connection logging */
extern int deny_severity; /* for connection logging */
#endif
extern char *hosts_allow_table; /* for verification mode redirection */
extern char *hosts_deny_table; /* for verification mode redirection */
extern int hosts_access_verbose; /* for verbose matching mode */
extern int rfc931_timeout; /* user lookup timeout */
extern int resident; /* > 0 if resident process */
/*
* Routines for controlled initialization and update of request structure
* attributes. Each attribute has its own key.
*/
#ifdef __STDC__
extern int hosts_access(struct request_info *request);
extern int hosts_ctl(char *daemon, char *client_name, char *client_addr,
char *client_user);
extern struct request_info *request_init(struct request_info *,...);
extern struct request_info *request_set(struct request_info *,...);
#else
extern int hosts_access();
extern int hosts_ctl();
extern struct request_info *request_init(); /* initialize request */
extern struct request_info *request_set(); /* update request structure */
#endif
#define RQ_FILE 1 /* file descriptor */
#define RQ_DAEMON 2 /* server process (argv[0]) */
#define RQ_USER 3 /* client user name */
#define RQ_CLIENT_NAME 4 /* client host name */
#define RQ_CLIENT_ADDR 5 /* client host address */
#define RQ_CLIENT_SIN 6 /* client endpoint (internal) */
#define RQ_SERVER_NAME 7 /* server host name */
#define RQ_SERVER_ADDR 8 /* server host address */
#define RQ_SERVER_SIN 9 /* server endpoint (internal) */
/*
* Routines for delayed evaluation of request attributes. Each attribute
* type has its own access method. The trivial ones are implemented by
* macros. The other ones are wrappers around the transport-specific host
* name, address, and client user lookup methods. The request_info and
* host_info structures serve as caches for the lookup results.
*/
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. */
/* look up endpoint addresses */
extern void sock_host __P((struct request_info *));
extern void sock_hostnofd __P((struct request_info *));
/* translate address to hostname */
extern void sock_hostname __P((struct host_info *));
/* address to printable address */
extern void sock_hostaddr __P((struct host_info *));
#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 __P((struct request_info *)); /* look up endpoint addresses etc. */
#endif
/*
* Problem reporting interface. Additional file/line context is reported
* when available. The jump buffer (tcpd_buf) is not declared here, or
* everyone would have to include .
*/
#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
struct tcpd_context {
char *file; /* current file */
int line; /* current line */
};
extern struct tcpd_context tcpd_context;
/*
* While processing access control rules, error conditions are handled by
* jumping back into the hosts_access() routine. This is cleaner than
* checking the return value of each and every silly little function. The
* (-1) returns are here because zero is already taken by longjmp().
*/
#define AC_PERMIT 1 /* permit access */
#define AC_DENY (-1) /* deny_access */
#define AC_ERROR AC_DENY /* XXX */
/*
* In verification mode an option function should just say what it would do,
* instead of really doing it. An option function that would not return
* should clear the dry_run flag to inform the caller of this unusual
* behavior.
*/
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();
#endif
#ifdef BROKEN_FGETS /* partial reads from sockets */
#define fgets fix_fgets
extern char *fix_fgets();
#endif
#ifdef RECVFROM_BUG /* no address family info */
#define recvfrom fix_recvfrom
extern int fix_recvfrom();
#endif
#ifdef GETPEERNAME_BUG /* claims success with UDP */
#define getpeername fix_getpeername
extern int fix_getpeername();
#endif
#ifdef SOLARIS_24_GETHOSTBYNAME_BUG /* lists addresses as aliases */
#define gethostbyname fix_gethostbyname
extern struct hostent *fix_gethostbyname();
#endif
#ifdef USE_STRSEP /* libc calls strtok() */
#define strtok fix_strtok
extern char *fix_strtok();
#endif
#ifdef LIBC_CALLS_STRTOK /* libc calls strtok() */
#define strtok my_strtok
extern char *my_strtok();
#endif
__END_DECLS
#endif /* tcpd.h */