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Diffstat (limited to 'src/pluto/dnskey.h')
| -rw-r--r-- | src/pluto/dnskey.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/pluto/dnskey.h b/src/pluto/dnskey.h new file mode 100644 index 000000000..0b9f0ee33 --- /dev/null +++ b/src/pluto/dnskey.h @@ -0,0 +1,84 @@ +/* Find public key in DNS + * Copyright (C) 2000-2002 D. Hugh Redelmeier. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * RCSID $Id: dnskey.h,v 1.1 2004/03/15 20:35:28 as Exp $ + */ + +extern int + adns_qfd, /* file descriptor for sending queries to adns */ + adns_afd; /* file descriptor for receiving answers from adns */ +extern const char *pluto_adns_option; /* path from --pluto_adns */ +extern void init_adns(void); +extern void stop_adns(void); +extern void handle_adns_answer(void); + +extern bool unsent_ADNS_queries; +extern void send_unsent_ADNS_queries(void); + +/* (common prefix of) stuff remembered between async query and answer. + * Filled in by start_adns_query. + * Freed by call to release_adns_continuation. + */ + +struct adns_continuation; /* forward declaration (not far!) */ + +typedef void (*cont_fn_t)(struct adns_continuation *cr, err_t ugh); + +struct adns_continuation { + unsigned long qtid; /* query transaction id number */ + int type; /* T_TXT or T_KEY, selecting rr type of interest */ + cont_fn_t cont_fn; /* function to carry on suspended work */ + struct id id; /* subject of query */ + bool sgw_specified; + struct id sgw_id; /* peer, if constrained */ + lset_t debugging; /* only used #ifdef DEBUG, but don't want layout to change */ + struct gw_info *gateways_from_dns; /* answer, if looking for our TXT rrs */ +#ifdef USE_KEYRR + struct pubkey_list *keys_from_dns; /* answer, if looking for KEY rrs */ +#endif + struct adns_continuation *previous, *next; + struct pubkey *last_info; /* the last structure we accumulated */ +#ifdef USE_LWRES + bool used; /* have we called the cont_fn yet? */ + struct { + u_char name_buf[NS_MAXDNAME + 2]; + } query; +#else /* ! USE_LWRES */ + struct adns_query query; +#endif /* ! USE_LWRES */ +}; + +extern err_t start_adns_query(const struct id *id /* domain to query */ + , const struct id *sgw_id /* if non-null, any accepted gw_info must match */ + , int type /* T_TXT or T_KEY, selecting rr type of interest */ + , cont_fn_t cont_fn /* continuation function */ + , struct adns_continuation *cr); + + +/* Gateway info gleaned from reverse DNS of client */ +struct gw_info { + unsigned refcnt; /* reference counted! */ + unsigned pref; /* preference: lower is better */ +#define NO_TIME ((time_t) -2) /* time_t value meaning "not_yet" */ + struct id client_id; /* id of client of peer */ + struct id gw_id; /* id of peer (if id_is_ipaddr, .ip_addr is address) */ + bool gw_key_present; + struct pubkey *key; + struct gw_info *next; +}; + +extern void gw_addref(struct gw_info *gw) + , gw_delref(struct gw_info **gwp); + +extern void reset_adns_restart_count(void); + |