naptr.c

/*
 * 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 <ctype.h>
#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 *naptr_parse(char *name, long ttl, int type, char *s)
{
    struct rr_naptr *rr = getmem(sizeof(*rr));
    int i;
    struct binary_data text;

    i = extract_integer(&s, "order", NULL);
    if (i < 0)
        return NULL;
    if (i >= 65536)
        return bitch("order range is not valid");
    rr->order = i;

    i = extract_integer(&s, "preference", NULL);
    if (i < 0)
        return NULL;
    if (i >= 65536)
        return bitch("preference range is not valid");
    rr->preference = i;

    text = extract_text(&s, "flags");
    if (text.length < 0)
        return NULL;
    for (i = 0; i < text.length; i++) {
        if (!isalnum(text.data[i])) {
            return bitch("flags contains illegal characters");
        }
    }
    rr->flags = text;

    text = extract_text(&s, "services");
    if (text.length < 0)
        return NULL;
    rr->services = text;

    text = extract_text(&s, "regexp");
    if (text.length < 0)
        return NULL;
    rr->regexp = text;

    rr->replacement = extract_name(&s, "replacement", 0);
    if (!rr->replacement)
        return NULL;

    if (*s) {
        return bitch("garbage after valid NAPTR data");
    }

    return store_record(type, name, ttl, rr);
}

static char* naptr_human(struct rr *rrv)
{
    RRCAST(naptr);
    char s[1024];

    snprintf(s, 1024, "%hu %hu \"%s\" ...",
             rr->order, rr->preference, rr->flags.data);

    return quickstrdup_temp(s);
}

static struct binary_data naptr_wirerdata(struct rr *rrv)
{
    RRCAST(naptr);

    return compose_binary_data("22bbbd", 1,
        rr->order, rr->preference,
        rr->flags, rr->services, rr->regexp,
        name2wire_name(rr->replacement));
}

struct rr_methods naptr_methods = { naptr_parse, naptr_human, naptr_wirerdata, NULL, NULL };