/*
* rdata.c
*
* rdata implementation
*
* a Net::DNS like library for C
*
* (c) NLnet Labs, 2004-2006
*
* See the file LICENSE for the license
*/
#include <ldns/config.h>
#include <ldns/ldns.h>
/*
* Access functions
* do this as functions to get type checking
*/
/* read */
size_t
ldns_rdf_size(const ldns_rdf *rd)
{
assert(rd != NULL);
return rd->_size;
}
ldns_rdf_type
ldns_rdf_get_type(const ldns_rdf *rd)
{
assert(rd != NULL);
return rd->_type;
}
uint8_t *
ldns_rdf_data(const ldns_rdf *rd)
{
assert(rd != NULL);
return rd->_data;
}
/* write */
void
ldns_rdf_set_size(ldns_rdf *rd, size_t size)
{
assert(rd != NULL);
rd->_size = size;
}
void
ldns_rdf_set_type(ldns_rdf *rd, ldns_rdf_type type)
{
assert(rd != NULL);
rd->_type = type;
}
void
ldns_rdf_set_data(ldns_rdf *rd, void *data)
{
/* only copy the pointer */
assert(rd != NULL);
rd->_data = data;
}
/* for types that allow it, return
* the native/host order type */
uint8_t
ldns_rdf2native_int8(const ldns_rdf *rd)
{
uint8_t data;
/* only allow 8 bit rdfs */
if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_BYTE) {
return 0;
}
memcpy(&data, ldns_rdf_data(rd), sizeof(data));
return data;
}
uint16_t
ldns_rdf2native_int16(const ldns_rdf *rd)
{
uint16_t data;
/* only allow 16 bit rdfs */
if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_WORD) {
return 0;
}
memcpy(&data, ldns_rdf_data(rd), sizeof(data));
return ntohs(data);
}
uint32_t
ldns_rdf2native_int32(const ldns_rdf *rd)
{
uint32_t data;
/* only allow 32 bit rdfs */
if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_DOUBLEWORD) {
return 0;
}
memcpy(&data, ldns_rdf_data(rd), sizeof(data));
return ntohl(data);
}
time_t
ldns_rdf2native_time_t(const ldns_rdf *rd)
{
uint32_t data;
/* only allow 32 bit rdfs */
if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_DOUBLEWORD ||
ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_TIME) {
return 0;
}
memcpy(&data, ldns_rdf_data(rd), sizeof(data));
return (time_t)ntohl(data);
}
ldns_rdf *
ldns_native2rdf_int8(ldns_rdf_type type, uint8_t value)
{
return ldns_rdf_new_frm_data(type, LDNS_RDF_SIZE_BYTE, &value);
}
ldns_rdf *
ldns_native2rdf_int16(ldns_rdf_type type, uint16_t value)
{
uint16_t *rdf_data = LDNS_XMALLOC(uint16_t, 1);
ldns_rdf* rdf;
if (!rdf_data) {
return NULL;
}
ldns_write_uint16(rdf_data, value);
rdf = ldns_rdf_new(type, LDNS_RDF_SIZE_WORD, rdf_data);
if(!rdf)
LDNS_FREE(rdf_data);
return rdf;
}
ldns_rdf *
ldns_native2rdf_int32(ldns_rdf_type type, uint32_t value)
{
uint32_t *rdf_data = LDNS_XMALLOC(uint32_t, 1);
ldns_rdf* rdf;
if (!rdf_data) {
return NULL;
}
ldns_write_uint32(rdf_data, value);
rdf = ldns_rdf_new(type, LDNS_RDF_SIZE_DOUBLEWORD, rdf_data);
if(!rdf)
LDNS_FREE(rdf_data);
return rdf;
}
ldns_rdf *
ldns_native2rdf_int16_data(size_t size, uint8_t *data)
{
uint8_t *rdf_data = LDNS_XMALLOC(uint8_t, size + 2);
ldns_rdf* rdf;
if (!rdf_data) {
return NULL;
}
ldns_write_uint16(rdf_data, size);
memcpy(rdf_data + 2, data, size);
rdf = ldns_rdf_new(LDNS_RDF_TYPE_INT16_DATA, size + 2, rdf_data);
if(!rdf)
LDNS_FREE(rdf_data);
return rdf;
}
/* note: data must be allocated memory */
ldns_rdf *
ldns_rdf_new(ldns_rdf_type type, size_t size, void *data)
{
ldns_rdf *rd;
rd = LDNS_MALLOC(ldns_rdf);
if (!rd) {
return NULL;
}
ldns_rdf_set_size(rd, size);
ldns_rdf_set_type(rd, type);
ldns_rdf_set_data(rd, data);
return rd;
}
ldns_rdf *
ldns_rdf_new_frm_data(ldns_rdf_type type, size_t size, const void *data)
{
ldns_rdf *rdf;
/* if the size is too big, fail */
if (size > LDNS_MAX_RDFLEN) {
return NULL;
}
/* allocate space */
rdf = LDNS_MALLOC(ldns_rdf);
if (!rdf) {
return NULL;
}
rdf->_data = LDNS_XMALLOC(uint8_t, size);
if (!rdf->_data) {
LDNS_FREE(rdf);
return NULL;
}
/* set the values */
ldns_rdf_set_type(rdf, type);
ldns_rdf_set_size(rdf, size);
memcpy(rdf->_data, data, size);
return rdf;
}
ldns_rdf *
ldns_rdf_clone(const ldns_rdf *rd)
{
assert(rd != NULL);
return (ldns_rdf_new_frm_data( ldns_rdf_get_type(rd),
ldns_rdf_size(rd), ldns_rdf_data(rd)));
}
void
ldns_rdf_deep_free(ldns_rdf *rd)
{
if (rd) {
if (rd->_data) {
LDNS_FREE(rd->_data);
}
LDNS_FREE(rd);
}
}
void
ldns_rdf_free(ldns_rdf *rd)
{
if (rd) {
LDNS_FREE(rd);
}
}
ldns_rdf *
ldns_rdf_new_frm_str(ldns_rdf_type type, const char *str)
{
ldns_rdf *rdf = NULL;
ldns_status status;
switch (type) {
case LDNS_RDF_TYPE_DNAME:
status = ldns_str2rdf_dname(&rdf, str);
break;
case LDNS_RDF_TYPE_INT8:
status = ldns_str2rdf_int8(&rdf, str);
break;
case LDNS_RDF_TYPE_INT16:
status = ldns_str2rdf_int16(&rdf, str);
break;
case LDNS_RDF_TYPE_INT32:
status = ldns_str2rdf_int32(&rdf, str);
break;
case LDNS_RDF_TYPE_A:
status = ldns_str2rdf_a(&rdf, str);
break;
case LDNS_RDF_TYPE_AAAA:
status = ldns_str2rdf_aaaa(&rdf, str);
break;
case LDNS_RDF_TYPE_STR:
status = ldns_str2rdf_str(&rdf, str);
break;
case LDNS_RDF_TYPE_APL:
status = ldns_str2rdf_apl(&rdf, str);
break;
case LDNS_RDF_TYPE_B64:
status = ldns_str2rdf_b64(&rdf, str);
break;
case LDNS_RDF_TYPE_B32_EXT:
status = ldns_str2rdf_b32_ext(&rdf, str);
break;
case LDNS_RDF_TYPE_HEX:
status = ldns_str2rdf_hex(&rdf, str);
break;
case LDNS_RDF_TYPE_NSEC:
status = ldns_str2rdf_nsec(&rdf, str);
break;
case LDNS_RDF_TYPE_TYPE:
status = ldns_str2rdf_type(&rdf, str);
break;
case LDNS_RDF_TYPE_CLASS:
status = ldns_str2rdf_class(&rdf, str);
break;
case LDNS_RDF_TYPE_CERT_ALG:
status = ldns_str2rdf_cert_alg(&rdf, str);
break;
case LDNS_RDF_TYPE_ALG:
status = ldns_str2rdf_alg(&rdf, str);
break;
case LDNS_RDF_TYPE_UNKNOWN:
status = ldns_str2rdf_unknown(&rdf, str);
break;
case LDNS_RDF_TYPE_TIME:
status = ldns_str2rdf_time(&rdf, str);
break;
case LDNS_RDF_TYPE_PERIOD:
status = ldns_str2rdf_period(&rdf, str);
break;
case LDNS_RDF_TYPE_HIP:
status = ldns_str2rdf_hip(&rdf, str);
break;
case LDNS_RDF_TYPE_SERVICE:
status = ldns_str2rdf_service(&rdf, str);
break;
case LDNS_RDF_TYPE_LOC:
status = ldns_str2rdf_loc(&rdf, str);
break;
case LDNS_RDF_TYPE_WKS:
status = ldns_str2rdf_wks(&rdf, str);
break;
case LDNS_RDF_TYPE_NSAP:
status = ldns_str2rdf_nsap(&rdf, str);
break;
case LDNS_RDF_TYPE_ATMA:
status = ldns_str2rdf_atma(&rdf, str);
break;
case LDNS_RDF_TYPE_IPSECKEY:
status = ldns_str2rdf_ipseckey(&rdf, str);
break;
case LDNS_RDF_TYPE_NSEC3_SALT:
status = ldns_str2rdf_nsec3_salt(&rdf, str);
break;
case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
status = ldns_str2rdf_b32_ext(&rdf, str);
break;
case LDNS_RDF_TYPE_ILNP64:
status = ldns_str2rdf_ilnp64(&rdf, str);
break;
case LDNS_RDF_TYPE_EUI48:
status = ldns_str2rdf_eui48(&rdf, str);
break;
case LDNS_RDF_TYPE_EUI64:
status = ldns_str2rdf_eui64(&rdf, str);
break;
case LDNS_RDF_TYPE_TAG:
status = ldns_str2rdf_tag(&rdf, str);
break;
case LDNS_RDF_TYPE_LONG_STR:
status = ldns_str2rdf_long_str(&rdf, str);
break;
case LDNS_RDF_TYPE_NONE:
default:
/* default default ??? */
status = LDNS_STATUS_ERR;
break;
}
if (LDNS_STATUS_OK == status) {
ldns_rdf_set_type(rdf, type);
return rdf;
}
if (rdf) {
LDNS_FREE(rdf);
}
return NULL;
}
ldns_status
ldns_rdf_new_frm_fp(ldns_rdf **rdf, ldns_rdf_type type, FILE *fp)
{
return ldns_rdf_new_frm_fp_l(rdf, type, fp, NULL);
}
ldns_status
ldns_rdf_new_frm_fp_l(ldns_rdf **rdf, ldns_rdf_type type, FILE *fp, int *line_nr)
{
char *line;
ldns_rdf *r;
ssize_t t;
line = LDNS_XMALLOC(char, LDNS_MAX_LINELEN + 1);
if (!line) {
return LDNS_STATUS_MEM_ERR;
}
/* read an entire line in from the file */
if ((t = ldns_fget_token_l(fp, line, LDNS_PARSE_SKIP_SPACE, 0, line_nr)) == -1 || t == 0) {
LDNS_FREE(line);
return LDNS_STATUS_SYNTAX_RDATA_ERR;
}
r = ldns_rdf_new_frm_str(type, (const char*) line);
LDNS_FREE(line);
if (rdf) {
*rdf = r;
return LDNS_STATUS_OK;
} else {
return LDNS_STATUS_NULL;
}
}
ldns_rdf *
ldns_rdf_address_reverse(ldns_rdf *rd)
{
uint8_t buf_4[LDNS_IP4ADDRLEN];
uint8_t buf_6[LDNS_IP6ADDRLEN * 2];
ldns_rdf *rev;
ldns_rdf *in_addr;
ldns_rdf *ret_dname;
uint8_t octet;
uint8_t nnibble;
uint8_t nibble;
uint8_t i, j;
char *char_dname;
int nbit;
if (ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_A &&
ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_AAAA) {
return NULL;
}
in_addr = NULL;
ret_dname = NULL;
switch(ldns_rdf_get_type(rd)) {
case LDNS_RDF_TYPE_A:
/* the length of the buffer is 4 */
buf_4[3] = ldns_rdf_data(rd)[0];
buf_4[2] = ldns_rdf_data(rd)[1];
buf_4[1] = ldns_rdf_data(rd)[2];
buf_4[0] = ldns_rdf_data(rd)[3];
in_addr = ldns_dname_new_frm_str("in-addr.arpa.");
if (!in_addr) {
return NULL;
}
/* make a new rdf and convert that back */
rev = ldns_rdf_new_frm_data( LDNS_RDF_TYPE_A,
LDNS_IP4ADDRLEN, (void*)&buf_4);
if (!rev) {
LDNS_FREE(in_addr);
return NULL;
}
/* convert rev to a string */
char_dname = ldns_rdf2str(rev);
if (!char_dname) {
LDNS_FREE(in_addr);
ldns_rdf_deep_free(rev);
return NULL;
}
/* transform back to rdf with type dname */
ret_dname = ldns_dname_new_frm_str(char_dname);
if (!ret_dname) {
LDNS_FREE(in_addr);
ldns_rdf_deep_free(rev);
LDNS_FREE(char_dname);
return NULL;
}
/* not needed anymore */
ldns_rdf_deep_free(rev);
LDNS_FREE(char_dname);
break;
case LDNS_RDF_TYPE_AAAA:
/* some foo magic to reverse the nibbles ... */
for (nbit = 127; nbit >= 0; nbit = nbit - 4) {
/* calculate octett (8 bit) */
octet = ( ((unsigned int) nbit) & 0x78) >> 3;
/* calculate nibble */
nnibble = ( ((unsigned int) nbit) & 0x04) >> 2;
/* extract nibble */
nibble = (ldns_rdf_data(rd)[octet] & ( 0xf << (4 * (1 -
nnibble)) ) ) >> ( 4 * (1 -
nnibble));
buf_6[(LDNS_IP6ADDRLEN * 2 - 1) -
(octet * 2 + nnibble)] =
(uint8_t)ldns_int_to_hexdigit((int)nibble);
}
char_dname = LDNS_XMALLOC(char, (LDNS_IP6ADDRLEN * 4));
if (!char_dname) {
return NULL;
}
char_dname[LDNS_IP6ADDRLEN * 4 - 1] = '\0'; /* closure */
/* walk the string and add . 's */
for (i = 0, j = 0; i < LDNS_IP6ADDRLEN * 2; i++, j = j + 2) {
char_dname[j] = (char)buf_6[i];
if (i != LDNS_IP6ADDRLEN * 2 - 1) {
char_dname[j + 1] = '.';
}
}
in_addr = ldns_dname_new_frm_str("ip6.arpa.");
if (!in_addr) {
LDNS_FREE(char_dname);
return NULL;
}
/* convert rev to a string */
ret_dname = ldns_dname_new_frm_str(char_dname);
LDNS_FREE(char_dname);
if (!ret_dname) {
ldns_rdf_deep_free(in_addr);
return NULL;
}
break;
default:
break;
}
/* add the suffix */
rev = ldns_dname_cat_clone(ret_dname, in_addr);
ldns_rdf_deep_free(ret_dname);
ldns_rdf_deep_free(in_addr);
return rev;
}
ldns_status
ldns_rdf_hip_get_alg_hit_pk(ldns_rdf *rdf, uint8_t* alg,
uint8_t *hit_size, uint8_t** hit,
uint16_t *pk_size, uint8_t** pk)
{
uint8_t *data;
size_t rdf_size;
if (! rdf || ! alg || ! hit || ! hit_size || ! pk || ! pk_size) {
return LDNS_STATUS_INVALID_POINTER;
} else if (ldns_rdf_get_type(rdf) != LDNS_RDF_TYPE_HIP) {
return LDNS_STATUS_INVALID_RDF_TYPE;
} else if ((rdf_size = ldns_rdf_size(rdf)) < 6) {
return LDNS_STATUS_WIRE_RDATA_ERR;
}
data = ldns_rdf_data(rdf);
*hit_size = data[0];
*alg = data[1];
*pk_size = ldns_read_uint16(data + 2);
*hit = data + 4;
*pk = data + 4 + *hit_size;
if (*hit_size == 0 || *pk_size == 0 ||
rdf_size < (size_t) *hit_size + *pk_size + 4) {
return LDNS_STATUS_WIRE_RDATA_ERR;
}
return LDNS_STATUS_OK;
}
ldns_status
ldns_rdf_hip_new_frm_alg_hit_pk(ldns_rdf** rdf, uint8_t alg,
uint8_t hit_size, uint8_t *hit,
uint16_t pk_size, uint8_t *pk)
{
uint8_t *data;
if (! rdf) {
return LDNS_STATUS_INVALID_POINTER;
}
if (4 + hit_size + pk_size > LDNS_MAX_RDFLEN) {
return LDNS_STATUS_RDATA_OVERFLOW;
}
data = LDNS_XMALLOC(uint8_t, 4 + hit_size + pk_size);
if (data == NULL) {
return LDNS_STATUS_MEM_ERR;
}
data[0] = hit_size;
data[1] = alg;
ldns_write_uint16(data + 2, pk_size);
memcpy(data + 4, hit, hit_size);
memcpy(data + 4 + hit_size, pk, pk_size);
*rdf = ldns_rdf_new(LDNS_RDF_TYPE_HIP, 4 + hit_size + pk_size, data);
if (! *rdf) {
LDNS_FREE(data);
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
ldns_status
ldns_octet(char *word, size_t *length)
{
char *s;
char *p;
*length = 0;
for (s = p = word; *s != '\0'; s++,p++) {
switch (*s) {
case '.':
if (s[1] == '.') {
return LDNS_STATUS_EMPTY_LABEL;
}
*p = *s;
(*length)++;
break;
case '\\':
if ('0' <= s[1] && s[1] <= '9' &&
'0' <= s[2] && s[2] <= '9' &&
'0' <= s[3] && s[3] <= '9') {
/* \DDD seen */
int val = ((s[1] - '0') * 100 +
(s[2] - '0') * 10 + (s[3] - '0'));
if (0 <= val && val <= 255) {
/* this also handles \0 */
s += 3;
*p = val;
(*length)++;
} else {
return LDNS_STATUS_DDD_OVERFLOW;
}
} else {
/* an espaced character, like \<space> ?
* remove the '\' keep the rest */
*p = *++s;
(*length)++;
}
break;
case '\"':
/* non quoted " Is either first or the last character in
* the string */
*p = *++s; /* skip it */
(*length)++;
/* I'm not sure if this is needed in libdns... MG */
if ( *s == '\0' ) {
/* ok, it was the last one */
*p = '\0';
return LDNS_STATUS_OK;
}
break;
default:
*p = *s;
(*length)++;
break;
}
}
*p = '\0';
return LDNS_STATUS_OK;
}
int
ldns_rdf_compare(const ldns_rdf *rd1, const ldns_rdf *rd2)
{
uint16_t i1, i2, i;
uint8_t *d1, *d2;
/* only when both are not NULL we can say anything about them */
if (!rd1 && !rd2) {
return 0;
}
if (!rd1 || !rd2) {
return -1;
}
i1 = ldns_rdf_size(rd1);
i2 = ldns_rdf_size(rd2);
if (i1 < i2) {
return -1;
} else if (i1 > i2) {
return +1;
} else {
d1 = (uint8_t*)ldns_rdf_data(rd1);
d2 = (uint8_t*)ldns_rdf_data(rd2);
for(i = 0; i < i1; i++) {
if (d1[i] < d2[i]) {
return -1;
} else if (d1[i] > d2[i]) {
return +1;
}
}
}
return 0;
}
uint32_t
ldns_str2period(const char *nptr, const char **endptr)
{
int sign = 0;
uint32_t i = 0;
uint32_t seconds = 0;
for(*endptr = nptr; **endptr; (*endptr)++) {
switch (**endptr) {
case ' ':
case '\t':
break;
case '-':
if(sign == 0) {
sign = -1;
} else {
return seconds;
}
break;
case '+':
if(sign == 0) {
sign = 1;
} else {
return seconds;
}
break;
case 's':
case 'S':
seconds += i;
i = 0;
break;
case 'm':
case 'M':
seconds += i * 60;
i = 0;
break;
case 'h':
case 'H':
seconds += i * 60 * 60;
i = 0;
break;
case 'd':
case 'D':
seconds += i * 60 * 60 * 24;
i = 0;
break;
case 'w':
case 'W':
seconds += i * 60 * 60 * 24 * 7;
i = 0;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
i *= 10;
i += (**endptr - '0');
break;
default:
seconds += i;
/* disregard signedness */
return seconds;
}
}
seconds += i;
/* disregard signedness */
return seconds;
}
