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/*
* Part of DNS zone file validator `validns`.
*
* Copyright 2011-2014 Anton Berezin <tobez@tobez.org>
* Modified BSD license.
* (See LICENSE file in the distribution.)
*
*/
#include <sys/types.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "common.h"
#include "textparse.h"
#include "mempool.h"
#include "carp.h"
#include "rr.h"
static struct rr *mx_parse(char *name, long ttl, int type, char *s)
{
struct rr_mx *rr = getmem(sizeof(*rr));
rr->preference = extract_integer(&s, "MX preference", NULL);
if (rr->preference < 0)
return NULL;
/* XXX preference range check */
rr->exchange = extract_name(&s, "MX exchange", 0);
if (!rr->exchange)
return NULL;
if (*s) {
return bitch("garbage after valid MX data");
}
return store_record(type, name, ttl, rr);
}
static char* mx_human(struct rr *rrv)
{
RRCAST(mx);
char s[1024];
snprintf(s, 1024, "%d %s",
rr->preference, rr->exchange);
return quickstrdup_temp(s);
}
static struct binary_data mx_wirerdata(struct rr *rrv)
{
RRCAST(mx);
return compose_binary_data("2d", 1,
rr->preference, name2wire_name(rr->exchange));
}
static void* mx_validate_set(struct rr_set *rr_set)
{
if (rr_set->named_rr->flags & NAME_FLAG_CONTAINS_SLASH) {
struct rr *rr = rr_set->tail;
return moan(rr->file_name, rr->line, "host name contains '/'");
}
return NULL;
}
static void *mx_validate(struct rr *rrv)
{
RRCAST(mx);
if (G.opt.policy_checks[POLICY_MX_ALIAS]) {
if (find_rr_set(T_CNAME, rr->exchange)) {
return moan(rr->rr.file_name, rr->rr.line, "MX exchange is an alias");
}
}
return NULL;
}
struct rr_methods mx_methods = { mx_parse, mx_human, mx_wirerdata, mx_validate_set, mx_validate };
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