+int get_host_seed __P((void)); /* Get host-dependent random number seed */
+int have_route_to __P((u_int32_t)); /* Check if route to addr exists */
+#ifdef PPP_FILTER
+int set_filters __P((struct bpf_program *pass, struct bpf_program *active));
+ /* Set filter programs in kernel */
+#endif
+#ifdef IPX_CHANGE
+int sipxfaddr __P((int, unsigned long, unsigned char *));
+int cipxfaddr __P((int));
+#endif
+int get_if_hwaddr __P((u_char *addr, char *name));
+char *get_first_ethernet __P((void));
+
+/* Procedures exported from options.c */
+int setipaddr __P((char *, char **, int)); /* Set local/remote ip addresses */
+int parse_args __P((int argc, char **argv));
+ /* Parse options from arguments given */
+int options_from_file __P((char *filename, int must_exist, int check_prot,
+ int privileged));
+ /* Parse options from an options file */
+int options_from_user __P((void)); /* Parse options from user's .ppprc */
+int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
+int options_from_list __P((struct wordlist *, int privileged));
+ /* Parse options from a wordlist */
+int getword __P((FILE *f, char *word, int *newlinep, char *filename));
+ /* Read a word from a file */
+void option_error __P((char *fmt, ...));
+ /* Print an error message about an option */
+int int_option __P((char *, int *));
+ /* Simplified number_option for decimal ints */
+void add_options __P((option_t *)); /* Add extra options */
+void check_options __P((void)); /* check values after all options parsed */
+int override_value __P((const char *, int, const char *));
+ /* override value if permitted by priority */
+void print_options __P((void (*) __P((void *, char *, ...)), void *));
+ /* print out values of all options */
+
+int parse_dotted_ip __P((char *, u_int32_t *));
+
+/*
+ * Hooks to enable plugins to change various things.
+ */
+extern int (*new_phase_hook) __P((int));
+extern int (*idle_time_hook) __P((struct ppp_idle *));
+extern int (*holdoff_hook) __P((void));
+extern int (*pap_check_hook) __P((void));
+extern int (*pap_auth_hook) __P((char *user, char *passwd, char **msgp,
+ struct wordlist **paddrs,
+ struct wordlist **popts));
+extern void (*pap_logout_hook) __P((void));
+extern int (*pap_passwd_hook) __P((char *user, char *passwd));
+extern int (*allowed_address_hook) __P((u_int32_t addr));
+extern void (*ip_up_hook) __P((void));
+extern void (*ip_down_hook) __P((void));
+extern void (*ip_choose_hook) __P((u_int32_t *));
+
+extern int (*chap_check_hook) __P((void));
+extern int (*chap_passwd_hook) __P((char *user, char *passwd));
+
+/* Let a plugin snoop sent and received packets. Useful for L2TP */
+extern void (*snoop_recv_hook) __P((unsigned char *p, int len));
+extern void (*snoop_send_hook) __P((unsigned char *p, int len));