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/* Pluto Asynchronous DNS Helper Program's Header
* Copyright (C) 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.
*/
#ifndef ADNS
/* dummy struct to make compilers happy */
struct adns_query {
};
#else /* rest of file */
/* The interface in RHL6.x and BIND distribution 8.2.2 are different,
* so we build some of our own :-(
*/
# ifndef NS_MAXDNAME
# define NS_MAXDNAME MAXDNAME /* I hope this is long enough for IPv6 */
# endif
# ifndef NS_PACKETSZ
# define NS_PACKETSZ PACKETSZ
# endif
/* protocol version */
#define ADNS_Q_MAGIC (((((('d' << 8) + 'n') << 8) + 's') << 8) + 4)
#define ADNS_A_MAGIC (((((('d' << 8) + 'n') << 8) + 's') << 8) + 128 + 4)
/* note: both struct adns_query and struct adns_answer must start with
* size_t len;
*/
struct adns_query {
size_t len;
unsigned int qmagic;
unsigned long serial;
lset_t debugging; /* only used #ifdef DEBUG, but don't want layout to change */
u_char name_buf[NS_MAXDNAME + 2];
int type; /* T_KEY or T_TXT */
};
struct adns_answer {
size_t len;
unsigned int amagic;
unsigned long serial;
struct adns_continuation *continuation;
int result;
int h_errno_val;
u_char ans[NS_PACKETSZ * 10]; /* very probably bigger than necessary */
};
enum helper_exit_status {
HES_CONTINUE = -1, /* not an exit */
HES_OK = 0, /* all's well that ends well (perhaps EOF) */
HES_INVOCATION, /* improper invocation */
HES_IO_ERROR_SELECT, /* IO error in select() */
HES_MALLOC, /* malloc failed */
HES_IO_ERROR_IN, /* error reading pipe */
HES_IO_ERROR_OUT, /* error reading pipe */
HES_PIPE, /* pipe(2) failed */
HES_SYNC, /* answer from worker doesn't match query */
HES_FORK, /* fork(2) failed */
HES_RES_INIT, /* resolver initialization failed */
HES_BAD_LEN, /* implausible .len field */
HES_BAD_MAGIC, /* .magic field wrong */
};
#endif /* ADNS */
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