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zonec.c
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/*
* zonec.c -- zone compiler.
*
* Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
*
* See LICENSE for the license.
*
*/
#include "config.h"
#include <assert.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <netinet/in.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#include "zonec.h"
#include "dname.h"
#include "dns.h"
#include "namedb.h"
#include "rdata.h"
#include "region-allocator.h"
#include "util.h"
#include "zparser.h"
#include "options.h"
#include "nsec3.h"
const dname_type *error_dname;
domain_type *error_domain;
/* Some global flags... */
static int vflag = 0;
/* if -v then print progress each 'progress' RRs */
static int progress = 10000;
static long int totalrrs = 0;
extern uint8_t nsecbits[NSEC_WINDOW_COUNT][NSEC_WINDOW_BITS_SIZE];
extern uint16_t nsec_highest_rcode;
/*
* Allocate SIZE+sizeof(uint16_t) bytes and store SIZE in the first
* element. Return a pointer to the allocation.
*/
static uint16_t *
alloc_rdata(region_type *region, size_t size)
{
uint16_t *result = region_alloc(region, sizeof(uint16_t) + size);
*result = size;
return result;
}
uint16_t *
alloc_rdata_init(region_type *region, const void *data, size_t size)
{
uint16_t *result = region_alloc(region, sizeof(uint16_t) + size);
*result = size;
memcpy(result + 1, data, size);
return result;
}
/*
* These are parser function for generic zone file stuff.
*/
uint16_t *
zparser_conv_hex(region_type *region, const char *hex, size_t len)
{
/* convert a hex value to wireformat */
uint16_t *r = NULL;
uint8_t *t;
int i;
if (len % 2 != 0) {
zc_error_prev_line("number of hex digits must be a multiple of 2");
} else if (len > MAX_RDLENGTH * 2) {
zc_error_prev_line("hex data exceeds maximum rdata length (%d)",
MAX_RDLENGTH);
} else {
/* the length part */
r = alloc_rdata(region, len/2);
t = (uint8_t *)(r + 1);
/* Now process octet by octet... */
while (*hex) {
*t = 0;
for (i = 16; i >= 1; i -= 15) {
if (isxdigit((int)*hex)) {
*t += hexdigit_to_int(*hex) * i;
} else {
zc_error_prev_line(
"illegal hex character '%c'",
(int) *hex);
return NULL;
}
++hex;
}
++t;
}
}
return r;
}
/* convert hex, precede by a 1-byte length */
uint16_t *
zparser_conv_hex_length(region_type *region, const char *hex, size_t len)
{
uint16_t *r = NULL;
uint8_t *t;
int i;
if (len % 2 != 0) {
zc_error_prev_line("number of hex digits must be a multiple of 2");
} else if (len > 255 * 2) {
zc_error_prev_line("hex data exceeds 255 bytes");
} else {
uint8_t *l;
/* the length part */
r = alloc_rdata(region, len/2+1);
t = (uint8_t *)(r + 1);
l = t++;
*l = '\0';
/* Now process octet by octet... */
while (*hex) {
*t = 0;
for (i = 16; i >= 1; i -= 15) {
if (isxdigit((int)*hex)) {
*t += hexdigit_to_int(*hex) * i;
} else {
zc_error_prev_line(
"illegal hex character '%c'",
(int) *hex);
return NULL;
}
++hex;
}
++t;
++*l;
}
}
return r;
}
uint16_t *
zparser_conv_time(region_type *region, const char *time)
{
/* convert a time YYHM to wireformat */
uint16_t *r = NULL;
struct tm tm;
/* Try to scan the time... */
if (!strptime(time, "%Y%m%d%H%M%S", &tm)) {
zc_error_prev_line("date and time is expected");
} else {
uint32_t l = htonl(mktime_from_utc(&tm));
r = alloc_rdata_init(region, &l, sizeof(l));
}
return r;
}
uint16_t *
zparser_conv_services(region_type *region, const char *protostr,
char *servicestr)
{
/*
* Convert a protocol and a list of service port numbers
* (separated by spaces) in the rdata to wireformat
*/
uint16_t *r = NULL;
uint8_t *p;
uint8_t bitmap[65536/8];
char sep[] = " ";
char *word;
int max_port = -8;
/* convert a protocol in the rdata to wireformat */
struct protoent *proto;
memset(bitmap, 0, sizeof(bitmap));
proto = getprotobyname(protostr);
if (!proto) {
proto = getprotobynumber(atoi(protostr));
}
if (!proto) {
zc_error_prev_line("unknown protocol '%s'", protostr);
return NULL;
}
for (word = strtok(servicestr, sep); word; word = strtok(NULL, sep)) {
struct servent *service;
int port;
service = getservbyname(word, proto->p_name);
if (service) {
/* Note: ntohs not ntohl! Strange but true. */
port = ntohs((uint16_t) service->s_port);
} else {
char *end;
port = strtol(word, &end, 10);
if (*end != '\0') {
zc_error_prev_line("unknown service '%s' for protocol '%s'",
word, protostr);
continue;
}
}
if (port < 0 || port > 65535) {
zc_error_prev_line("bad port number %d", port);
} else {
set_bit(bitmap, port);
if (port > max_port)
max_port = port;
}
}
r = alloc_rdata(region, sizeof(uint8_t) + max_port / 8 + 1);
p = (uint8_t *) (r + 1);
*p = proto->p_proto;
memcpy(p + 1, bitmap, *r);
return r;
}
uint16_t *
zparser_conv_serial(region_type *region, const char *serialstr)
{
uint16_t *r = NULL;
uint32_t serial;
const char *t;
serial = strtoserial(serialstr, &t);
if (*t != '\0') {
zc_error_prev_line("serial is expected");
} else {
serial = htonl(serial);
r = alloc_rdata_init(region, &serial, sizeof(serial));
}
return r;
}
uint16_t *
zparser_conv_period(region_type *region, const char *periodstr)
{
/* convert a time period (think TTL's) to wireformat) */
uint16_t *r = NULL;
uint32_t period;
const char *end;
/* Allocate required space... */
period = strtottl(periodstr, &end);
if (*end != '\0') {
zc_error_prev_line("time period is expected");
} else {
period = htonl(period);
r = alloc_rdata_init(region, &period, sizeof(period));
}
return r;
}
uint16_t *
zparser_conv_short(region_type *region, const char *text)
{
uint16_t *r = NULL;
uint16_t value;
char *end;
value = htons((uint16_t) strtol(text, &end, 10));
if (*end != '\0') {
zc_error_prev_line("integer value is expected");
} else {
r = alloc_rdata_init(region, &value, sizeof(value));
}
return r;
}
uint16_t *
zparser_conv_byte(region_type *region, const char *text)
{
uint16_t *r = NULL;
uint8_t value;
char *end;
value = (uint8_t) strtol(text, &end, 10);
if (*end != '\0') {
zc_error_prev_line("integer value is expected");
} else {
r = alloc_rdata_init(region, &value, sizeof(value));
}
return r;
}
uint16_t *
zparser_conv_algorithm(region_type *region, const char *text)
{
const lookup_table_type *alg;
uint8_t id;
alg = lookup_by_name(dns_algorithms, text);
if (alg) {
id = (uint8_t) alg->id;
} else {
char *end;
id = (uint8_t) strtol(text, &end, 10);
if (*end != '\0') {
zc_error_prev_line("algorithm is expected");
return NULL;
}
}
return alloc_rdata_init(region, &id, sizeof(id));
}
uint16_t *
zparser_conv_certificate_type(region_type *region, const char *text)
{
/* convert a algoritm string to integer */
const lookup_table_type *type;
uint16_t id;
type = lookup_by_name(dns_certificate_types, text);
if (type) {
id = htons((uint16_t) type->id);
} else {
char *end;
id = htons((uint16_t) strtol(text, &end, 10));
if (*end != '\0') {
zc_error_prev_line("certificate type is expected");
return NULL;
}
}
return alloc_rdata_init(region, &id, sizeof(id));
}
uint16_t *
zparser_conv_a(region_type *region, const char *text)
{
in_addr_t address;
uint16_t *r = NULL;
if (inet_pton(AF_INET, text, &address) != 1) {
zc_error_prev_line("invalid IPv4 address '%s'", text);
} else {
r = alloc_rdata_init(region, &address, sizeof(address));
}
return r;
}
uint16_t *
zparser_conv_aaaa(region_type *region, const char *text)
{
uint8_t address[IP6ADDRLEN];
uint16_t *r = NULL;
if (inet_pton(AF_INET6, text, address) != 1) {
zc_error_prev_line("invalid IPv6 address '%s'", text);
} else {
r = alloc_rdata_init(region, address, sizeof(address));
}
return r;
}
uint16_t *
zparser_conv_text(region_type *region, const char *text, size_t len)
{
uint16_t *r = NULL;
if (len > 255) {
zc_error_prev_line("text string is longer than 255 characters,"
" try splitting it into multiple parts");
} else {
uint8_t *p;
r = alloc_rdata(region, len + 1);
p = (uint8_t *) (r + 1);
*p = len;
memcpy(p + 1, text, len);
}
return r;
}
uint16_t *
zparser_conv_dns_name(region_type *region, const uint8_t* name, size_t len)
{
uint16_t* r = NULL;
uint8_t* p = NULL;
r = alloc_rdata(region, len);
p = (uint8_t *) (r + 1);
memcpy(p, name, len);
return r;
}
uint16_t *
zparser_conv_b32(region_type *region, const char *b32)
{
uint8_t buffer[B64BUFSIZE];
uint16_t *r = NULL;
int i;
if(strcmp(b32, "-") == 0) {
return alloc_rdata_init(region, "", 1);
}
i = b32_pton(b32, buffer+1, B64BUFSIZE-1);
if (i == -1 || i > 255) {
zc_error_prev_line("invalid base32 data");
} else {
buffer[0] = i; /* store length byte */
r = alloc_rdata_init(region, buffer, i+1);
}
return r;
}
uint16_t *
zparser_conv_b64(region_type *region, const char *b64)
{
uint8_t buffer[B64BUFSIZE];
uint16_t *r = NULL;
int i;
i = b64_pton(b64, buffer, B64BUFSIZE);
if (i == -1) {
zc_error_prev_line("invalid base64 data");
} else {
r = alloc_rdata_init(region, buffer, i);
}
return r;
}
uint16_t *
zparser_conv_rrtype(region_type *region, const char *text)
{
uint16_t *r = NULL;
uint16_t type = rrtype_from_string(text);
if (type == 0) {
zc_error_prev_line("unrecognized RR type '%s'", text);
} else {
type = htons(type);
r = alloc_rdata_init(region, &type, sizeof(type));
}
return r;
}
uint16_t *
zparser_conv_nxt(region_type *region, uint8_t nxtbits[])
{
/* nxtbits[] consists of 16 bytes with some zero's in it
* copy every byte with zero to r and write the length in
* the first byte
*/
uint16_t i;
uint16_t last = 0;
for (i = 0; i < 16; i++) {
if (nxtbits[i] != 0)
last = i + 1;
}
return alloc_rdata_init(region, nxtbits, last);
}
/* we potentially have 256 windows, each one is numbered. empty ones
* should be discarded
*/
uint16_t *
zparser_conv_nsec(region_type *region,
uint8_t nsecbits[NSEC_WINDOW_COUNT][NSEC_WINDOW_BITS_SIZE])
{
/* nsecbits contains up to 64K of bits which represent the
* types available for a name. Walk the bits according to
* nsec++ draft from jakob
*/
uint16_t *r;
uint8_t *ptr;
size_t i,j;
uint16_t window_count = 0;
uint16_t total_size = 0;
uint16_t window_max = 0;
/* The used windows. */
int used[NSEC_WINDOW_COUNT];
/* The last byte used in each the window. */
int size[NSEC_WINDOW_COUNT];
window_max = 1 + (nsec_highest_rcode / 256);
/* used[i] is the i-th window included in the nsec
* size[used[0]] is the size of window 0
*/
/* walk through the 256 windows */
for (i = 0; i < window_max; ++i) {
int empty_window = 1;
/* check each of the 32 bytes */
for (j = 0; j < NSEC_WINDOW_BITS_SIZE; ++j) {
if (nsecbits[i][j] != 0) {
size[i] = j + 1;
empty_window = 0;
}
}
if (!empty_window) {
used[window_count] = i;
window_count++;
}
}
for (i = 0; i < window_count; ++i) {
total_size += sizeof(uint16_t) + size[used[i]];
}
r = alloc_rdata(region, total_size);
ptr = (uint8_t *) (r + 1);
/* now walk used and copy it */
for (i = 0; i < window_count; ++i) {
ptr[0] = used[i];
ptr[1] = size[used[i]];
memcpy(ptr + 2, &nsecbits[used[i]], size[used[i]]);
ptr += size[used[i]] + 2;
}
return r;
}
/* Parse an int terminated in the specified range. */
static int
parse_int(const char *str,
char **end,
int *result,
const char *name,
int min,
int max)
{
*result = (int) strtol(str, end, 10);
if (*result < min || *result > max) {
zc_error_prev_line("%s must be within the range [%d .. %d]",
name,
min,
max);
return 0;
} else {
return 1;
}
}
/* RFC1876 conversion routines */
static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
1000000,10000000,100000000,1000000000};
/*
* Converts ascii size/precision X * 10**Y(cm) to 0xXY.
* Sets the given pointer to the last used character.
*
*/
static uint8_t
precsize_aton (char *cp, char **endptr)
{
unsigned int mval = 0, cmval = 0;
uint8_t retval = 0;
int exponent;
int mantissa;
while (isdigit((int)*cp))
mval = mval * 10 + hexdigit_to_int(*cp++);
if (*cp == '.') { /* centimeters */
cp++;
if (isdigit((int)*cp)) {
cmval = hexdigit_to_int(*cp++) * 10;
if (isdigit((int)*cp)) {
cmval += hexdigit_to_int(*cp++);
}
}
}
if(mval >= poweroften[7]) {
/* integer overflow possible for *100 */
mantissa = mval / poweroften[7];
exponent = 9; /* max */
}
else {
cmval = (mval * 100) + cmval;
for (exponent = 0; exponent < 9; exponent++)
if (cmval < poweroften[exponent+1])
break;
mantissa = cmval / poweroften[exponent];
}
if (mantissa > 9)
mantissa = 9;
retval = (mantissa << 4) | exponent;
if (*cp == 'm') cp++;
*endptr = cp;
return (retval);
}
/*
* Parses a specific part of rdata.
*
* Returns:
*
* number of elements parsed
* zero on error
*
*/
uint16_t *
zparser_conv_loc(region_type *region, char *str)
{
uint16_t *r;
uint32_t *p;
int i;
int deg, min, secs; /* Secs is stored times 1000. */
uint32_t lat = 0, lon = 0, alt = 0;
/* encoded defaults: version=0 sz=1m hp=10000m vp=10m */
uint8_t vszhpvp[4] = {0, 0x12, 0x16, 0x13};
char *start;
double d;
for(;;) {
deg = min = secs = 0;
/* Degrees */
if (*str == '\0') {
zc_error_prev_line("unexpected end of LOC data");
return NULL;
}
if (!parse_int(str, &str, °, "degrees", 0, 180))
return NULL;
if (!isspace((int)*str)) {
zc_error_prev_line("space expected after degrees");
return NULL;
}
++str;
/* Minutes? */
if (isdigit((int)*str)) {
if (!parse_int(str, &str, &min, "minutes", 0, 60))
return NULL;
if (!isspace((int)*str)) {
zc_error_prev_line("space expected after minutes");
return NULL;
}
++str;
}
/* Seconds? */
if (isdigit((int)*str)) {
start = str;
if (!parse_int(str, &str, &i, "seconds", 0, 60)) {
return NULL;
}
if (*str == '.' && !parse_int(str + 1, &str, &i, "seconds fraction", 0, 999)) {
return NULL;
}
if (!isspace((int)*str)) {
zc_error_prev_line("space expected after seconds");
return NULL;
}
if (sscanf(start, "%lf", &d) != 1) {
zc_error_prev_line("error parsing seconds");
}
if (d < 0.0 || d > 60.0) {
zc_error_prev_line("seconds not in range 0.0 .. 60.0");
}
secs = (int) (d * 1000.0 + 0.5);
++str;
}
switch(*str) {
case 'N':
case 'n':
lat = ((uint32_t)1<<31) + (deg * 3600000 + min * 60000 + secs);
break;
case 'E':
case 'e':
lon = ((uint32_t)1<<31) + (deg * 3600000 + min * 60000 + secs);
break;
case 'S':
case 's':
lat = ((uint32_t)1<<31) - (deg * 3600000 + min * 60000 + secs);
break;
case 'W':
case 'w':
lon = ((uint32_t)1<<31) - (deg * 3600000 + min * 60000 + secs);
break;
default:
zc_error_prev_line("invalid latitude/longtitude: '%c'", *str);
return NULL;
}
++str;
if (lat != 0 && lon != 0)
break;
if (!isspace((int)*str)) {
zc_error_prev_line("space expected after latitude/longitude");
return NULL;
}
++str;
}
/* Altitude */
if (*str == '\0') {
zc_error_prev_line("unexpected end of LOC data");
return NULL;
}
if (!isspace((int)*str)) {
zc_error_prev_line("space expected before altitude");
return NULL;
}
++str;
start = str;
/* Sign */
if (*str == '+' || *str == '-') {
++str;
}
/* Meters of altitude... */
(void) strtol(str, &str, 10);
switch(*str) {
case ' ':
case '\0':
case 'm':
break;
case '.':
if (!parse_int(str + 1, &str, &i, "altitude fraction", 0, 99)) {
return NULL;
}
if (!isspace((int)*str) && *str != '\0' && *str != 'm') {
zc_error_prev_line("altitude fraction must be a number");
return NULL;
}
break;
default:
zc_error_prev_line("altitude must be expressed in meters");
return NULL;
}
if (!isspace((int)*str) && *str != '\0')
++str;
if (sscanf(start, "%lf", &d) != 1) {
zc_error_prev_line("error parsing altitude");
}
alt = (uint32_t) (10000000.0 + d * 100 + 0.5);
if (!isspace((int)*str) && *str != '\0') {
zc_error_prev_line("unexpected character after altitude");
return NULL;
}
/* Now parse size, horizontal precision and vertical precision if any */
for(i = 1; isspace((int)*str) && i <= 3; i++) {
vszhpvp[i] = precsize_aton(str + 1, &str);
if (!isspace((int)*str) && *str != '\0') {
zc_error_prev_line("invalid size or precision");
return NULL;
}
}
/* Allocate required space... */
r = alloc_rdata(region, 16);
p = (uint32_t *) (r + 1);
memmove(p, vszhpvp, 4);
write_uint32(p + 1, lat);
write_uint32(p + 2, lon);
write_uint32(p + 3, alt);
return r;
}
/*
* Convert an APL RR RDATA element.
*/
uint16_t *
zparser_conv_apl_rdata(region_type *region, char *str)
{
int negated = 0;
uint16_t address_family;
uint8_t prefix;
uint8_t maximum_prefix;
uint8_t length;
uint8_t address[IP6ADDRLEN];
char *colon = strchr(str, ':');
char *slash = strchr(str, '/');
int af;
int rc;
uint16_t rdlength;
uint16_t *r;
uint8_t *t;
char *end;
long p;
if (!colon) {
zc_error("address family separator is missing");
return NULL;
}
if (!slash) {
zc_error("prefix separator is missing");
return NULL;
}
*colon = '\0';
*slash = '\0';
if (*str == '!') {
negated = 1;
++str;
}
if (strcmp(str, "1") == 0) {
address_family = htons(1);
af = AF_INET;
length = sizeof(in_addr_t);
maximum_prefix = length * 8;
} else if (strcmp(str, "2") == 0) {
address_family = htons(2);
af = AF_INET6;
length = IP6ADDRLEN;
maximum_prefix = length * 8;
} else {
zc_error("invalid address family '%s'", str);
return NULL;
}
rc = inet_pton(af, colon + 1, address);
if (rc == 0) {
zc_error("invalid address '%s'", colon + 1);
return NULL;
} else if (rc == -1) {
zc_error("inet_pton failed: %s", strerror(errno));
return NULL;
}
/* Strip trailing zero octets. */
while (length > 0 && address[length - 1] == 0)
--length;
p = strtol(slash + 1, &end, 10);
if (p < 0 || p > maximum_prefix) {
zc_error("prefix not in the range 0 .. %d", maximum_prefix);
return NULL;
} else if (*end != '\0') {
zc_error("invalid prefix '%s'", slash + 1);
return NULL;
}
prefix = (uint8_t) p;
rdlength = (sizeof(address_family) + sizeof(prefix) + sizeof(length)
+ length);
r = alloc_rdata(region, rdlength);
t = (uint8_t *) (r + 1);
memcpy(t, &address_family, sizeof(address_family));
t += sizeof(address_family);
memcpy(t, &prefix, sizeof(prefix));
t += sizeof(prefix);
memcpy(t, &length, sizeof(length));
if (negated) {
*t |= APL_NEGATION_MASK;
}
t += sizeof(length);
memcpy(t, address, length);
return r;
}
/*
* Below some function that also convert but not to wireformat
* but to "normal" (int,long,char) types
*/
uint32_t
zparser_ttl2int(const char *ttlstr, int* error)
{
/* convert a ttl value to a integer
* return the ttl in a int
* -1 on error
*/
uint32_t ttl;
const char *t;
ttl = strtottl(ttlstr, &t);
if (*t != 0) {
zc_error_prev_line("invalid TTL value: %s",ttlstr);
*error = 1;
}
return ttl;
}
void
zadd_rdata_wireformat(uint16_t *data)
{
if (parser->current_rr.rdata_count >= MAXRDATALEN) {
zc_error_prev_line("too many rdata elements");
} else {
parser->current_rr.rdatas[parser->current_rr.rdata_count].data
= data;
++parser->current_rr.rdata_count;
}
}
/**
* Used for TXT RR's to grow with undefined number of strings.
*/
void
zadd_rdata_txt_wireformat(uint16_t *data, int first)
{
rdata_atom_type *rd;
/* First STR in str_seq, allocate 65K in first unused rdata
* else find last used rdata */
if (first) {
rd = &parser->current_rr.rdatas[parser->current_rr.rdata_count];
if ((rd->data = (uint16_t *) region_alloc(parser->rr_region,
sizeof(uint16_t) + 65535 * sizeof(uint8_t))) == NULL) {
zc_error_prev_line("Could not allocate memory for TXT RR");
return;
}
parser->current_rr.rdata_count++;
rd->data[0] = 0;
}
else
rd = &parser->current_rr.rdatas[parser->current_rr.rdata_count-1];
if ((size_t)rd->data[0] + (size_t)data[0] > 65535) {
zc_error_prev_line("too large rdata element");
return;
}
memcpy((uint8_t *)rd->data + 2 + rd->data[0], data + 1, data[0]);
rd->data[0] += data[0];
}
/**
* Clean up after last call of zadd_rdata_txt_wireformat
*/
void
zadd_rdata_txt_clean_wireformat()
{
uint16_t *tmp_data;
rdata_atom_type *rd = &parser->current_rr.rdatas[parser->current_rr.rdata_count-1];
if ((tmp_data = (uint16_t *) region_alloc(parser->region,
rd->data[0] + 2)) != NULL) {
memcpy(tmp_data, rd->data, rd->data[0] + 2);
region_recycle(parser->region, rd->data,
sizeof(uint16_t) + 65535 * sizeof(uint8_t));
rd->data = tmp_data;
}
else {
/* We could not get memory in non-volatile region */
zc_error_prev_line("could not allocate memory for rdata");
return;
}
}
void
zadd_rdata_domain(domain_type *domain)
{
if (parser->current_rr.rdata_count >= MAXRDATALEN) {
zc_error_prev_line("too many rdata elements");