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monero/external/unbound/sldns/str2wire.c
Erik de Castro Lopo a85b5759f3 Upgrade unbound library 
These files were pulled from the 1.6.3 release tarball.

This new version builds against OpenSSL version 1.1 which will be
the default in the new Debian Stable which is due to be released
RealSoonNow (tm).
2017-06-17 23:04:00 +10:00

2024 lines
54 KiB
C
Raw Blame History

/**
* str2wire.c - read txt presentation of RRs
*
* (c) NLnet Labs, 2005-2006
*
* See the file LICENSE for the license
*/
/**
* \file
*
* Parses text to wireformat.
*/
#include "config.h"
#include "sldns/str2wire.h"
#include "sldns/wire2str.h"
#include "sldns/sbuffer.h"
#include "sldns/parse.h"
#include "sldns/parseutil.h"
#include <ctype.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
/** return an error */
#define RET_ERR(e, off) ((int)((e)|((off)<<LDNS_WIREPARSE_SHIFT)))
/** Move parse error but keep its ID */
#define RET_ERR_SHIFT(e, move) RET_ERR(LDNS_WIREPARSE_ERROR(e), LDNS_WIREPARSE_OFFSET(e)+(move));
#define LDNS_IP6ADDRLEN (128/8)
/*
* No special care is taken, all dots are translated into
* label separators.
* @param rel: true if the domain is not absolute (not terminated in .).
* The output is then still terminated with a '0' rootlabel.
*/
static int sldns_str2wire_dname_buf_rel(const char* str, uint8_t* buf,
size_t* olen, int* rel)
{
size_t len;
const char *s;
uint8_t *q, *pq, label_len;
if(rel) *rel = 0;
len = strlen((char*)str);
/* octet representation can make strings a lot longer than actual length */
if (len > LDNS_MAX_DOMAINLEN * 4) {
return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, 0);
}
if (0 == len) {
return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW, 0);
}
/* root label */
if (1 == len && *str == '.') {
if(*olen < 1)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, 0);
buf[0] = 0;
*olen = 1;
return LDNS_WIREPARSE_ERR_OK;
}
/* get on with the rest */
/* s is on the current character in the string
* pq points to where the labellength is going to go
* label_len keeps track of the current label's length
* q builds the dname inside the buf array
*/
len = 0;
if(*olen < 1)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, 0);
q = buf+1;
pq = buf;
label_len = 0;
for (s = str; *s; s++, q++) {
if (q >= buf + *olen)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, q-buf);
if (q > buf + LDNS_MAX_DOMAINLEN)
return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, q-buf);
switch (*s) {
case '.':
if (label_len > LDNS_MAX_LABELLEN) {
return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, q-buf);
}
if (label_len == 0) {
return RET_ERR(LDNS_WIREPARSE_ERR_EMPTY_LABEL, q-buf);
}
len += label_len + 1;
*q = 0;
*pq = label_len;
label_len = 0;
pq = q;
break;
case '\\':
/* octet value or literal char */
s += 1;
if (!sldns_parse_escape(q, &s)) {
*q = 0;
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE, q-buf);
}
s -= 1;
label_len++;
break;
default:
*q = (uint8_t)*s;
label_len++;
}
}
/* add root label if last char was not '.' */
if(label_len != 0) {
if(rel) *rel = 1;
if (q >= buf + *olen)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, q-buf);
if (q > buf + LDNS_MAX_DOMAINLEN) {
return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, q-buf);
}
if (label_len > LDNS_MAX_LABELLEN) {
return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, q-buf);
}
if (label_len == 0) { /* label_len 0 but not . at end? */
return RET_ERR(LDNS_WIREPARSE_ERR_EMPTY_LABEL, q-buf);
}
len += label_len + 1;
*pq = label_len;
*q = 0;
}
len++;
*olen = len;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_dname_buf(const char* str, uint8_t* buf, size_t* len)
{
return sldns_str2wire_dname_buf_rel(str, buf, len, NULL);
}
int sldns_str2wire_dname_buf_origin(const char* str, uint8_t* buf, size_t* len,
uint8_t* origin, size_t origin_len)
{
size_t dlen = *len;
int rel = 0;
int s = sldns_str2wire_dname_buf_rel(str, buf, &dlen, &rel);
if(s) return s;
if(rel && origin && dlen > 0) {
if(dlen + origin_len - 1 > LDNS_MAX_DOMAINLEN)
return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW,
LDNS_MAX_DOMAINLEN);
if(dlen + origin_len - 1 > *len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
*len);
memmove(buf+dlen-1, origin, origin_len);
*len = dlen + origin_len - 1;
} else
*len = dlen;
return LDNS_WIREPARSE_ERR_OK;
}
uint8_t* sldns_str2wire_dname(const char* str, size_t* len)
{
uint8_t dname[LDNS_MAX_DOMAINLEN+1];
*len = sizeof(dname);
if(sldns_str2wire_dname_buf(str, dname, len) == 0) {
uint8_t* r = (uint8_t*)malloc(*len);
if(r) return memcpy(r, dname, *len);
}
*len = 0;
return NULL;
}
/** read owner name */
static int
rrinternal_get_owner(sldns_buffer* strbuf, uint8_t* rr, size_t* len,
size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev,
size_t prev_len, char* token, size_t token_len)
{
/* split the rr in its parts -1 signals trouble */
if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX,
sldns_buffer_position(strbuf));
}
if(strcmp(token, "@") == 0) {
uint8_t* tocopy;
if (origin) {
*dname_len = origin_len;
tocopy = origin;
} else if (prev) {
*dname_len = prev_len;
tocopy = prev;
} else {
/* default to root */
*dname_len = 1;
tocopy = (uint8_t*)"\0";
}
if(*len < *dname_len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
memmove(rr, tocopy, *dname_len);
} else if(*token == '\0') {
/* no ownername was given, try prev, if that fails
* origin, else default to root */
uint8_t* tocopy;
if(prev) {
*dname_len = prev_len;
tocopy = prev;
} else if(origin) {
*dname_len = origin_len;
tocopy = origin;
} else {
*dname_len = 1;
tocopy = (uint8_t*)"\0";
}
if(*len < *dname_len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
memmove(rr, tocopy, *dname_len);
} else {
size_t dlen = *len;
int s = sldns_str2wire_dname_buf_origin(token, rr, &dlen,
origin, origin_len);
if(s) return RET_ERR_SHIFT(s,
sldns_buffer_position(strbuf)-strlen(token));
*dname_len = dlen;
}
return LDNS_WIREPARSE_ERR_OK;
}
/** read ttl */
static int
rrinternal_get_ttl(sldns_buffer* strbuf, char* token, size_t token_len,
int* not_there, uint32_t* ttl, uint32_t default_ttl)
{
const char* endptr;
if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TTL,
sldns_buffer_position(strbuf));
}
*ttl = (uint32_t) sldns_str2period(token, &endptr);
if (strlen(token) > 0 && !isdigit((unsigned char)token[0])) {
*not_there = 1;
/* ah, it's not there or something */
if (default_ttl == 0) {
*ttl = LDNS_DEFAULT_TTL;
} else {
*ttl = default_ttl;
}
}
return LDNS_WIREPARSE_ERR_OK;
}
/** read class */
static int
rrinternal_get_class(sldns_buffer* strbuf, char* token, size_t token_len,
int* not_there, uint16_t* cl)
{
/* if 'not_there' then we got token from previous parse routine */
if(!*not_there) {
/* parse new token for class */
if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_CLASS,
sldns_buffer_position(strbuf));
}
} else *not_there = 0;
*cl = sldns_get_rr_class_by_name(token);
/* class can be left out too, assume IN, current token must be type */
if(*cl == 0 && strcmp(token, "CLASS0") != 0) {
*not_there = 1;
*cl = LDNS_RR_CLASS_IN;
}
return LDNS_WIREPARSE_ERR_OK;
}
/** read type */
static int
rrinternal_get_type(sldns_buffer* strbuf, char* token, size_t token_len,
int* not_there, uint16_t* tp)
{
/* if 'not_there' then we got token from previous parse routine */
if(!*not_there) {
/* parse new token for type */
if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE,
sldns_buffer_position(strbuf));
}
}
*tp = sldns_get_rr_type_by_name(token);
if(*tp == 0 && strcmp(token, "TYPE0") != 0) {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE,
sldns_buffer_position(strbuf));
}
return LDNS_WIREPARSE_ERR_OK;
}
/** put type, class, ttl into rr buffer */
static int
rrinternal_write_typeclassttl(sldns_buffer* strbuf, uint8_t* rr, size_t len,
size_t dname_len, uint16_t tp, uint16_t cl, uint32_t ttl, int question)
{
if(question) {
/* question is : name, type, class */
if(dname_len + 4 > len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
sldns_write_uint16(rr+dname_len, tp);
sldns_write_uint16(rr+dname_len+2, cl);
return LDNS_WIREPARSE_ERR_OK;
}
/* type(2), class(2), ttl(4), rdatalen(2 (later)) = 10 */
if(dname_len + 10 > len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
sldns_write_uint16(rr+dname_len, tp);
sldns_write_uint16(rr+dname_len+2, cl);
sldns_write_uint32(rr+dname_len+4, ttl);
sldns_write_uint16(rr+dname_len+8, 0); /* rdatalen placeholder */
return LDNS_WIREPARSE_ERR_OK;
}
/** find delimiters for type */
static const char*
rrinternal_get_delims(sldns_rdf_type rdftype, size_t r_cnt, size_t r_max)
{
switch(rdftype) {
case LDNS_RDF_TYPE_B64 :
case LDNS_RDF_TYPE_HEX : /* These rdf types may con- */
case LDNS_RDF_TYPE_LOC : /* tain whitespace, only if */
case LDNS_RDF_TYPE_WKS : /* it is the last rd field. */
case LDNS_RDF_TYPE_IPSECKEY :
case LDNS_RDF_TYPE_NSEC : if (r_cnt == r_max - 1) {
return "\n";
}
break;
default : break;
}
return "\n\t ";
}
/* Syntactic sugar for sldns_rr_new_frm_str_internal */
static int
sldns_rdf_type_maybe_quoted(sldns_rdf_type rdf_type)
{
return rdf_type == LDNS_RDF_TYPE_STR ||
rdf_type == LDNS_RDF_TYPE_LONG_STR;
}
/** see if rdata is quoted */
static int
rrinternal_get_quoted(sldns_buffer* strbuf, const char** delimiters,
sldns_rdf_type rdftype)
{
if(sldns_rdf_type_maybe_quoted(rdftype) &&
sldns_buffer_remaining(strbuf) > 0) {
/* skip spaces */
while(sldns_buffer_remaining(strbuf) > 0 &&
*(sldns_buffer_current(strbuf)) == ' ') {
sldns_buffer_skip(strbuf, 1);
}
if(sldns_buffer_remaining(strbuf) > 0 &&
*(sldns_buffer_current(strbuf)) == '\"') {
*delimiters = "\"\0";
sldns_buffer_skip(strbuf, 1);
return 1;
}
}
return 0;
}
/** spool hex data into rdata */
static int
rrinternal_spool_hex(char* token, uint8_t* rr, size_t rr_len,
size_t rr_cur_len, size_t* cur_hex_data_size, size_t hex_data_size)
{
char* p = token;
while(*p) {
if(isspace((unsigned char)*p)) {
p++;
continue;
}
if(!isxdigit((unsigned char)*p))
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
p-token);
if(*cur_hex_data_size >= hex_data_size)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
p-token);
/* extra robust check */
if(rr_cur_len+(*cur_hex_data_size)/2 >= rr_len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
p-token);
/* see if 16s or 1s */
if( ((*cur_hex_data_size)&1) == 0) {
rr[rr_cur_len+(*cur_hex_data_size)/2] =
(uint8_t)sldns_hexdigit_to_int(*p)*16;
} else {
rr[rr_cur_len+(*cur_hex_data_size)/2] +=
(uint8_t)sldns_hexdigit_to_int(*p);
}
p++;
(*cur_hex_data_size)++;
}
return LDNS_WIREPARSE_ERR_OK;
}
/** read unknown rr type format */
static int
rrinternal_parse_unknown(sldns_buffer* strbuf, char* token, size_t token_len,
uint8_t* rr, size_t* rr_len, size_t* rr_cur_len, size_t pre_data_pos)
{
const char* delim = "\n\t ";
size_t hex_data_size, cur_hex_data_size;
/* go back to before \#
* and skip it while setting delimiters better
*/
sldns_buffer_set_position(strbuf, pre_data_pos);
if(sldns_bget_token(strbuf, token, delim, token_len) == -1)
return LDNS_WIREPARSE_ERR_GENERAL; /* should not fail */
/* read rdata octet length */
if(sldns_bget_token(strbuf, token, delim, token_len) == -1) {
/* something goes very wrong here */
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
sldns_buffer_position(strbuf));
}
hex_data_size = (size_t)atoi(token);
if(hex_data_size > LDNS_MAX_RDFLEN ||
*rr_cur_len + hex_data_size > *rr_len) {
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
}
/* copy hex chars into hex str (2 chars per byte) */
hex_data_size *= 2;
cur_hex_data_size = 0;
while(cur_hex_data_size < hex_data_size) {
int status;
ssize_t c = sldns_bget_token(strbuf, token, delim, token_len);
if((status = rrinternal_spool_hex(token, rr, *rr_len,
*rr_cur_len, &cur_hex_data_size, hex_data_size)) != 0)
return RET_ERR_SHIFT(status,
sldns_buffer_position(strbuf)-strlen(token));
if(c == -1) {
if(cur_hex_data_size != hex_data_size)
return RET_ERR(
LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
sldns_buffer_position(strbuf));
break;
}
}
*rr_cur_len += hex_data_size/2;
return LDNS_WIREPARSE_ERR_OK;
}
/** parse normal RR rdata element */
static int
rrinternal_parse_rdf(sldns_buffer* strbuf, char* token, size_t token_len,
uint8_t* rr, size_t rr_len, size_t* rr_cur_len, sldns_rdf_type rdftype,
uint16_t rr_type, size_t r_cnt, size_t r_max, size_t dname_len,
uint8_t* origin, size_t origin_len)
{
size_t len;
int status;
switch(rdftype) {
case LDNS_RDF_TYPE_DNAME:
/* check if the origin should be used or concatenated */
if(strcmp(token, "@") == 0) {
uint8_t* tocopy;
size_t copylen;
if(origin) {
copylen = origin_len;
tocopy = origin;
} else if(rr_type == LDNS_RR_TYPE_SOA) {
copylen = dname_len;
tocopy = rr; /* copy rr owner name */
} else {
copylen = 1;
tocopy = (uint8_t*)"\0";
}
if((*rr_cur_len) + copylen > rr_len)
return RET_ERR(
LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
memmove(rr+*rr_cur_len, tocopy, copylen);
(*rr_cur_len) += copylen;
} else {
size_t dlen = rr_len - (*rr_cur_len);
int s = sldns_str2wire_dname_buf_origin(token,
rr+*rr_cur_len, &dlen, origin, origin_len);
if(s) return RET_ERR_SHIFT(s,
sldns_buffer_position(strbuf)-strlen(token));
(*rr_cur_len) += dlen;
}
return LDNS_WIREPARSE_ERR_OK;
case LDNS_RDF_TYPE_HEX:
case LDNS_RDF_TYPE_B64:
/* When this is the last rdata field, then the
* rest should be read in (cause then these
* rdf types may contain spaces). */
if(r_cnt == r_max - 1) {
size_t tlen = strlen(token);
(void)sldns_bget_token(strbuf, token+tlen, "\n",
token_len - tlen);
}
break;
default:
break;
}
len = rr_len - (*rr_cur_len);
if((status=sldns_str2wire_rdf_buf(token, rr+(*rr_cur_len), &len,
rdftype)) != 0)
return RET_ERR_SHIFT(status,
sldns_buffer_position(strbuf)-strlen(token));
*rr_cur_len += len;
return LDNS_WIREPARSE_ERR_OK;
}
/**
* Parse one rdf token. Takes care of quotes and parenthesis.
*/
static int
sldns_parse_rdf_token(sldns_buffer* strbuf, char* token, size_t token_len,
int* quoted, int* parens, size_t* pre_data_pos,
const char* delimiters, sldns_rdf_type rdftype, size_t* token_strlen)
{
size_t slen;
/* skip spaces */
while(sldns_buffer_remaining(strbuf) > 0 && !*quoted &&
*(sldns_buffer_current(strbuf)) == ' ') {
sldns_buffer_skip(strbuf, 1);
}
*pre_data_pos = sldns_buffer_position(strbuf);
if(sldns_bget_token_par(strbuf, token, (*quoted)?"\"":delimiters,
token_len, parens, (*quoted)?NULL:" \t") == -1) {
return 0;
}
slen = strlen(token);
/* check if not quoted yet, and we have encountered quotes */
if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) &&
slen >= 2 &&
(token[0] == '"' || token[0] == '\'') &&
(token[slen-1] == '"' || token[slen-1] == '\'')) {
/* move token two smaller (quotes) with endnull */
memmove(token, token+1, slen-2);
token[slen-2] = 0;
slen -= 2;
*quoted = 1;
} else if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) &&
slen >= 2 &&
(token[0] == '"' || token[0] == '\'')) {
/* got the start quote (remove it) but read remainder
* of quoted string as well into remainder of token */
memmove(token, token+1, slen-1);
token[slen-1] = 0;
slen -= 1;
*quoted = 1;
/* rewind buffer over skipped whitespace */
while(sldns_buffer_position(strbuf) > 0 &&
(sldns_buffer_current(strbuf)[-1] == ' ' ||
sldns_buffer_current(strbuf)[-1] == '\t')) {
sldns_buffer_skip(strbuf, -1);
}
if(sldns_bget_token_par(strbuf, token+slen,
"\"", token_len-slen,
parens, NULL) == -1) {
return 0;
}
slen = strlen(token);
}
*token_strlen = slen;
return 1;
}
/** Add space and one more rdf token onto the existing token string. */
static int
sldns_affix_token(sldns_buffer* strbuf, char* token, size_t* token_len,
int* quoted, int* parens, size_t* pre_data_pos,
const char* delimiters, sldns_rdf_type rdftype, size_t* token_strlen)
{
size_t addlen = *token_len - *token_strlen;
size_t addstrlen = 0;
/* add space */
if(addlen < 1) return 0;
token[*token_strlen] = ' ';
token[++(*token_strlen)] = 0;
/* read another token */
addlen = *token_len - *token_strlen;
if(!sldns_parse_rdf_token(strbuf, token+*token_strlen, addlen, quoted,
parens, pre_data_pos, delimiters, rdftype, &addstrlen))
return 0;
(*token_strlen) += addstrlen;
return 1;
}
/** parse rdata from string into rr buffer(-remainder after dname). */
static int
rrinternal_parse_rdata(sldns_buffer* strbuf, char* token, size_t token_len,
uint8_t* rr, size_t* rr_len, size_t dname_len, uint16_t rr_type,
uint8_t* origin, size_t origin_len)
{
const sldns_rr_descriptor *desc = sldns_rr_descript((uint16_t)rr_type);
size_t r_cnt, r_min, r_max;
size_t rr_cur_len = dname_len + 10, pre_data_pos, token_strlen;
int was_unknown_rr_format = 0, parens = 0, status, quoted;
const char* delimiters;
sldns_rdf_type rdftype;
/* a desc is always returned */
if(!desc) return LDNS_WIREPARSE_ERR_GENERAL;
r_max = sldns_rr_descriptor_maximum(desc);
r_min = sldns_rr_descriptor_minimum(desc);
/* robust check */
if(rr_cur_len > *rr_len)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(strbuf));
/* because number of fields can be variable, we can't rely on
* _maximum() only */
for(r_cnt=0; r_cnt < r_max; r_cnt++) {
rdftype = sldns_rr_descriptor_field_type(desc, r_cnt);
delimiters = rrinternal_get_delims(rdftype, r_cnt, r_max);
quoted = rrinternal_get_quoted(strbuf, &delimiters, rdftype);
if(!sldns_parse_rdf_token(strbuf, token, token_len, &quoted,
&parens, &pre_data_pos, delimiters, rdftype,
&token_strlen))
break;
/* rfc3597 specifies that any type can be represented
* with \# method, which can contain spaces...
* it does specify size though... */
/* unknown RR data */
if(token_strlen>=2 && strncmp(token, "\\#", 2) == 0 &&
!quoted && (token_strlen == 2 || token[2]==' ')) {
was_unknown_rr_format = 1;
if((status=rrinternal_parse_unknown(strbuf, token,
token_len, rr, rr_len, &rr_cur_len,
pre_data_pos)) != 0)
return status;
} else if(token_strlen > 0 || quoted) {
if(rdftype == LDNS_RDF_TYPE_HIP) {
/* affix the HIT and PK fields, with a space */
if(!sldns_affix_token(strbuf, token,
&token_len, &quoted, &parens,
&pre_data_pos, delimiters,
rdftype, &token_strlen))
break;
if(!sldns_affix_token(strbuf, token,
&token_len, &quoted, &parens,
&pre_data_pos, delimiters,
rdftype, &token_strlen))
break;
}
/* normal RR */
if((status=rrinternal_parse_rdf(strbuf, token,
token_len, rr, *rr_len, &rr_cur_len, rdftype,
rr_type, r_cnt, r_max, dname_len, origin,
origin_len)) != 0) {
return status;
}
}
}
if(!was_unknown_rr_format && r_cnt+1 < r_min) {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE,
sldns_buffer_position(strbuf));
}
while(parens != 0) {
/* read remainder, must be "" */
if(sldns_bget_token_par(strbuf, token, "\n", token_len,
&parens, " \t") == -1) {
if(parens != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_PARENTHESIS,
sldns_buffer_position(strbuf));
break;
}
if(strcmp(token, "") != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_PARENTHESIS,
sldns_buffer_position(strbuf));
}
/* write rdata length */
sldns_write_uint16(rr+dname_len+8, (uint16_t)(rr_cur_len-dname_len-10));
*rr_len = rr_cur_len;
return LDNS_WIREPARSE_ERR_OK;
}
/*
* trailing spaces are allowed
* leading spaces are not allowed
* allow ttl to be optional
* class is optional too
* if ttl is missing, and default_ttl is 0, use DEF_TTL
* allow ttl to be written as 1d3h
* So the RR should look like. e.g.
* miek.nl. 3600 IN MX 10 elektron.atoom.net
* or
* miek.nl. 1h IN MX 10 elektron.atoom.net
* or
* miek.nl. IN MX 10 elektron.atoom.net
*/
static int
sldns_str2wire_rr_buf_internal(const char* str, uint8_t* rr, size_t* len,
size_t* dname_len, uint32_t default_ttl, uint8_t* origin,
size_t origin_len, uint8_t* prev, size_t prev_len, int question)
{
int status;
int not_there = 0;
char token[LDNS_MAX_RDFLEN+1];
uint32_t ttl = 0;
uint16_t tp = 0, cl = 0;
size_t ddlen = 0;
/* string in buffer */
sldns_buffer strbuf;
sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
if(!dname_len) dname_len = &ddlen;
/* parse the owner */
if((status=rrinternal_get_owner(&strbuf, rr, len, dname_len, origin,
origin_len, prev, prev_len, token, sizeof(token))) != 0)
return status;
/* parse the [ttl] [class] <type> */
if((status=rrinternal_get_ttl(&strbuf, token, sizeof(token),
&not_there, &ttl, default_ttl)) != 0)
return status;
if((status=rrinternal_get_class(&strbuf, token, sizeof(token),
&not_there, &cl)) != 0)
return status;
if((status=rrinternal_get_type(&strbuf, token, sizeof(token),
&not_there, &tp)) != 0)
return status;
/* put ttl, class, type into the rr result */
if((status=rrinternal_write_typeclassttl(&strbuf, rr, *len, *dname_len, tp, cl,
ttl, question)) != 0)
return status;
/* for a question-RR we are done, no rdata */
if(question) {
*len = *dname_len + 4;
return LDNS_WIREPARSE_ERR_OK;
}
/* rdata */
if((status=rrinternal_parse_rdata(&strbuf, token, sizeof(token),
rr, len, *dname_len, tp, origin, origin_len)) != 0)
return status;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_rr_buf(const char* str, uint8_t* rr, size_t* len,
size_t* dname_len, uint32_t default_ttl, uint8_t* origin,
size_t origin_len, uint8_t* prev, size_t prev_len)
{
return sldns_str2wire_rr_buf_internal(str, rr, len, dname_len,
default_ttl, origin, origin_len, prev, prev_len, 0);
}
int sldns_str2wire_rr_question_buf(const char* str, uint8_t* rr, size_t* len,
size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev,
size_t prev_len)
{
return sldns_str2wire_rr_buf_internal(str, rr, len, dname_len,
0, origin, origin_len, prev, prev_len, 1);
}
uint16_t sldns_wirerr_get_type(uint8_t* rr, size_t len, size_t dname_len)
{
if(len < dname_len+2)
return 0;
return sldns_read_uint16(rr+dname_len);
}
uint16_t sldns_wirerr_get_class(uint8_t* rr, size_t len, size_t dname_len)
{
if(len < dname_len+4)
return 0;
return sldns_read_uint16(rr+dname_len+2);
}
uint32_t sldns_wirerr_get_ttl(uint8_t* rr, size_t len, size_t dname_len)
{
if(len < dname_len+8)
return 0;
return sldns_read_uint32(rr+dname_len+4);
}
uint16_t sldns_wirerr_get_rdatalen(uint8_t* rr, size_t len, size_t dname_len)
{
if(len < dname_len+10)
return 0;
return sldns_read_uint16(rr+dname_len+8);
}
uint8_t* sldns_wirerr_get_rdata(uint8_t* rr, size_t len, size_t dname_len)
{
if(len < dname_len+10)
return NULL;
return rr+dname_len+10;
}
uint8_t* sldns_wirerr_get_rdatawl(uint8_t* rr, size_t len, size_t dname_len)
{
if(len < dname_len+10)
return NULL;
return rr+dname_len+8;
}
const char* sldns_get_errorstr_parse(int e)
{
sldns_lookup_table *lt;
lt = sldns_lookup_by_id(sldns_wireparse_errors, LDNS_WIREPARSE_ERROR(e));
return lt?lt->name:"unknown error";
}
/* Strip whitespace from the start and the end of <line>. */
static char *
sldns_strip_ws(char *line)
{
char *s = line, *e;
for (s = line; *s && isspace((unsigned char)*s); s++)
;
for (e = strchr(s, 0); e > s+2 && isspace((unsigned char)e[-1]) && e[-2] != '\\'; e--)
;
*e = 0;
return s;
}
int sldns_fp2wire_rr_buf(FILE* in, uint8_t* rr, size_t* len, size_t* dname_len,
struct sldns_file_parse_state* parse_state)
{
char line[LDNS_RR_BUF_SIZE+1];
ssize_t size;
/* read an entire line in from the file */
if((size = sldns_fget_token_l(in, line, LDNS_PARSE_SKIP_SPACE,
LDNS_RR_BUF_SIZE, parse_state?&parse_state->lineno:NULL))
== -1) {
/* if last line was empty, we are now at feof, which is not
* always a parse error (happens when for instance last line
* was a comment)
*/
return LDNS_WIREPARSE_ERR_SYNTAX;
}
/* we can have the situation, where we've read ok, but still got
* no bytes to play with, in this case size is 0 */
if(size == 0) {
*len = 0;
*dname_len = 0;
return LDNS_WIREPARSE_ERR_OK;
}
if(strncmp(line, "$ORIGIN", 7) == 0 && isspace((unsigned char)line[7])) {
int s;
*len = 0;
*dname_len = 0;
if(!parse_state) return LDNS_WIREPARSE_ERR_OK;
parse_state->origin_len = sizeof(parse_state->origin);
s = sldns_str2wire_dname_buf(sldns_strip_ws(line+8),
parse_state->origin, &parse_state->origin_len);
if(s) parse_state->origin_len = 0;
return s;
} else if(strncmp(line, "$TTL", 4) == 0 && isspace((unsigned char)line[4])) {
const char* end = NULL;
*len = 0;
*dname_len = 0;
if(!parse_state) return LDNS_WIREPARSE_ERR_OK;
parse_state->default_ttl = sldns_str2period(
sldns_strip_ws(line+5), &end);
} else if (strncmp(line, "$INCLUDE", 8) == 0) {
*len = 0;
*dname_len = 0;
return LDNS_WIREPARSE_ERR_INCLUDE;
} else {
return sldns_str2wire_rr_buf(line, rr, len, dname_len,
parse_state?parse_state->default_ttl:0,
(parse_state&&parse_state->origin_len)?
parse_state->origin:NULL,
parse_state?parse_state->origin_len:0,
(parse_state&&parse_state->prev_rr_len)?
parse_state->prev_rr:NULL,
parse_state?parse_state->prev_rr_len:0);
}
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_rdf_buf(const char* str, uint8_t* rd, size_t* len,
sldns_rdf_type rdftype)
{
switch (rdftype) {
case LDNS_RDF_TYPE_DNAME:
return sldns_str2wire_dname_buf(str, rd, len);
case LDNS_RDF_TYPE_INT8:
return sldns_str2wire_int8_buf(str, rd, len);
case LDNS_RDF_TYPE_INT16:
return sldns_str2wire_int16_buf(str, rd, len);
case LDNS_RDF_TYPE_INT32:
return sldns_str2wire_int32_buf(str, rd, len);
case LDNS_RDF_TYPE_A:
return sldns_str2wire_a_buf(str, rd, len);
case LDNS_RDF_TYPE_AAAA:
return sldns_str2wire_aaaa_buf(str, rd, len);
case LDNS_RDF_TYPE_STR:
return sldns_str2wire_str_buf(str, rd, len);
case LDNS_RDF_TYPE_APL:
return sldns_str2wire_apl_buf(str, rd, len);
case LDNS_RDF_TYPE_B64:
return sldns_str2wire_b64_buf(str, rd, len);
case LDNS_RDF_TYPE_B32_EXT:
return sldns_str2wire_b32_ext_buf(str, rd, len);
case LDNS_RDF_TYPE_HEX:
return sldns_str2wire_hex_buf(str, rd, len);
case LDNS_RDF_TYPE_NSEC:
return sldns_str2wire_nsec_buf(str, rd, len);
case LDNS_RDF_TYPE_TYPE:
return sldns_str2wire_type_buf(str, rd, len);
case LDNS_RDF_TYPE_CLASS:
return sldns_str2wire_class_buf(str, rd, len);
case LDNS_RDF_TYPE_CERT_ALG:
return sldns_str2wire_cert_alg_buf(str, rd, len);
case LDNS_RDF_TYPE_ALG:
return sldns_str2wire_alg_buf(str, rd, len);
case LDNS_RDF_TYPE_TIME:
return sldns_str2wire_time_buf(str, rd, len);
case LDNS_RDF_TYPE_PERIOD:
return sldns_str2wire_period_buf(str, rd, len);
case LDNS_RDF_TYPE_LOC:
return sldns_str2wire_loc_buf(str, rd, len);
case LDNS_RDF_TYPE_WKS:
return sldns_str2wire_wks_buf(str, rd, len);
case LDNS_RDF_TYPE_NSAP:
return sldns_str2wire_nsap_buf(str, rd, len);
case LDNS_RDF_TYPE_ATMA:
return sldns_str2wire_atma_buf(str, rd, len);
case LDNS_RDF_TYPE_IPSECKEY:
return sldns_str2wire_ipseckey_buf(str, rd, len);
case LDNS_RDF_TYPE_NSEC3_SALT:
return sldns_str2wire_nsec3_salt_buf(str, rd, len);
case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
return sldns_str2wire_b32_ext_buf(str, rd, len);
case LDNS_RDF_TYPE_ILNP64:
return sldns_str2wire_ilnp64_buf(str, rd, len);
case LDNS_RDF_TYPE_EUI48:
return sldns_str2wire_eui48_buf(str, rd, len);
case LDNS_RDF_TYPE_EUI64:
return sldns_str2wire_eui64_buf(str, rd, len);
case LDNS_RDF_TYPE_TAG:
return sldns_str2wire_tag_buf(str, rd, len);
case LDNS_RDF_TYPE_LONG_STR:
return sldns_str2wire_long_str_buf(str, rd, len);
case LDNS_RDF_TYPE_HIP:
return sldns_str2wire_hip_buf(str, rd, len);
case LDNS_RDF_TYPE_INT16_DATA:
return sldns_str2wire_int16_data_buf(str, rd, len);
case LDNS_RDF_TYPE_UNKNOWN:
case LDNS_RDF_TYPE_SERVICE:
return LDNS_WIREPARSE_ERR_NOT_IMPL;
case LDNS_RDF_TYPE_NONE:
default:
break;
}
return LDNS_WIREPARSE_ERR_GENERAL;
}
int sldns_str2wire_int8_buf(const char* str, uint8_t* rd, size_t* len)
{
char* end;
uint8_t r = (uint8_t)strtol((char*)str, &end, 10);
if(*end != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str);
if(*len < 1)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
rd[0] = r;
*len = 1;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_int16_buf(const char* str, uint8_t* rd, size_t* len)
{
char* end;
uint16_t r = (uint16_t)strtol((char*)str, &end, 10);
if(*end != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str);
if(*len < 2)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
sldns_write_uint16(rd, r);
*len = 2;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_int32_buf(const char* str, uint8_t* rd, size_t* len)
{
char* end;
uint32_t r;
errno = 0; /* must set to zero before call,
note race condition on errno */
if(*str == '-')
r = (uint32_t)strtol((char*)str, &end, 10);
else r = (uint32_t)strtoul((char*)str, &end, 10);
if(*end != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str);
if(errno == ERANGE)
return LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW;
if(*len < 4)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
sldns_write_uint32(rd, r);
*len = 4;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_a_buf(const char* str, uint8_t* rd, size_t* len)
{
struct in_addr address;
if(inet_pton(AF_INET, (char*)str, &address) != 1)
return LDNS_WIREPARSE_ERR_SYNTAX_IP4;
if(*len < sizeof(address))
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
memmove(rd, &address, sizeof(address));
*len = sizeof(address);
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_aaaa_buf(const char* str, uint8_t* rd, size_t* len)
{
#ifdef AF_INET6
uint8_t address[LDNS_IP6ADDRLEN + 1];
if(inet_pton(AF_INET6, (char*)str, address) != 1)
return LDNS_WIREPARSE_ERR_SYNTAX_IP6;
if(*len < LDNS_IP6ADDRLEN)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
memmove(rd, address, LDNS_IP6ADDRLEN);
*len = LDNS_IP6ADDRLEN;
return LDNS_WIREPARSE_ERR_OK;
#else
return LDNS_WIREPARSE_ERR_NOT_IMPL;
#endif
}
int sldns_str2wire_str_buf(const char* str, uint8_t* rd, size_t* len)
{
uint8_t ch = 0;
size_t sl = 0;
const char* s = str;
/* skip length byte */
if(*len < 1)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
/* read characters */
while(sldns_parse_char(&ch, &s)) {
if(sl >= 255)
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, s-str);
if(*len < sl+1)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
s-str);
rd[++sl] = ch;
}
if(!s)
return LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE;
rd[0] = (uint8_t)sl;
*len = sl+1;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_apl_buf(const char* str, uint8_t* rd, size_t* len)
{
const char *my_str = str;
char my_ip_str[64];
size_t ip_str_len;
uint16_t family;
int negation;
size_t adflength = 0;
uint8_t data[16+4];
uint8_t prefix;
size_t i;
if(*my_str == '\0') {
/* empty APL element, no data, no string */
*len = 0;
return LDNS_WIREPARSE_ERR_OK;
}
/* [!]afi:address/prefix */
if (strlen(my_str) < 2
|| strchr(my_str, ':') == NULL
|| strchr(my_str, '/') == NULL
|| strchr(my_str, ':') > strchr(my_str, '/')) {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
if (my_str[0] == '!') {
negation = 1;
my_str += 1;
} else {
negation = 0;
}
family = (uint16_t) atoi(my_str);
my_str = strchr(my_str, ':') + 1;
/* need ip addr and only ip addr for inet_pton */
ip_str_len = (size_t) (strchr(my_str, '/') - my_str);
if(ip_str_len+1 > sizeof(my_ip_str))
return LDNS_WIREPARSE_ERR_INVALID_STR;
(void)strlcpy(my_ip_str, my_str, sizeof(my_ip_str));
my_ip_str[ip_str_len] = 0;
if (family == 1) {
/* ipv4 */
if(inet_pton(AF_INET, my_ip_str, data+4) == 0)
return LDNS_WIREPARSE_ERR_INVALID_STR;
for (i = 0; i < 4; i++) {
if (data[i+4] != 0) {
adflength = i + 1;
}
}
} else if (family == 2) {
/* ipv6 */
if (inet_pton(AF_INET6, my_ip_str, data+4) == 0)
return LDNS_WIREPARSE_ERR_INVALID_STR;
for (i = 0; i < 16; i++) {
if (data[i+4] != 0) {
adflength = i + 1;
}
}
} else {
/* unknown family */
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
my_str = strchr(my_str, '/') + 1;
prefix = (uint8_t) atoi(my_str);
sldns_write_uint16(data, family);
data[2] = prefix;
data[3] = (uint8_t)adflength;
if (negation) {
/* set bit 1 of byte 3 */
data[3] = data[3] | 0x80;
}
if(*len < 4+adflength)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
memmove(rd, data, 4+adflength);
*len = 4+adflength;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_b64_buf(const char* str, uint8_t* rd, size_t* len)
{
size_t sz = sldns_b64_pton_calculate_size(strlen(str));
int n;
if(*len < sz)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
n = sldns_b64_pton(str, rd, *len);
if(n < 0)
return LDNS_WIREPARSE_ERR_SYNTAX_B64;
*len = (size_t)n;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_b32_ext_buf(const char* str, uint8_t* rd, size_t* len)
{
size_t slen = strlen(str);
size_t sz = sldns_b32_pton_calculate_size(slen);
int n;
if(*len < 1+sz)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
rd[0] = (uint8_t)sz;
n = sldns_b32_pton_extended_hex(str, slen, rd+1, *len-1);
if(n < 0)
return LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT;
*len = (size_t)n+1;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_hex_buf(const char* str, uint8_t* rd, size_t* len)
{
const char* s = str;
size_t dlen = 0; /* number of hexdigits parsed */
while(*s) {
if(isspace((unsigned char)*s)) {
s++;
continue;
}
if(!isxdigit((unsigned char)*s))
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
if(*len < dlen/2 + 1)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
s-str);
if((dlen&1)==0)
rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
else rd[dlen/2] += (uint8_t)sldns_hexdigit_to_int(*s++);
dlen++;
}
if((dlen&1)!=0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
*len = dlen/2;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_nsec_buf(const char* str, uint8_t* rd, size_t* len)
{
const char *delim = "\n\t ";
char token[64]; /* for a type name */
size_t type_count = 0;
int block;
size_t used = 0;
uint16_t maxtype = 0;
uint8_t typebits[8192]; /* 65536 bits */
uint8_t window_in_use[256];
/* string in buffer */
sldns_buffer strbuf;
sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
/* parse the types */
memset(typebits, 0, sizeof(typebits));
memset(window_in_use, 0, sizeof(window_in_use));
while(sldns_buffer_remaining(&strbuf) > 0 &&
sldns_bget_token(&strbuf, token, delim, sizeof(token)) != -1) {
uint16_t t = sldns_get_rr_type_by_name(token);
if(token[0] == 0)
continue;
if(t == 0 && strcmp(token, "TYPE0") != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE,
sldns_buffer_position(&strbuf));
typebits[t/8] |= (0x80>>(t%8));
window_in_use[t/256] = 1;
type_count++;
if(t > maxtype) maxtype = t;
}
/* empty NSEC bitmap */
if(type_count == 0) {
*len = 0;
return LDNS_WIREPARSE_ERR_OK;
}
/* encode windows {u8 windowblock, u8 bitmaplength, 0-32u8 bitmap},
* block is 0-255 upper octet of types, length if 0-32. */
for(block = 0; block <= (int)maxtype/256; block++) {
int i, blocklen = 0;
if(!window_in_use[block])
continue;
for(i=0; i<32; i++) {
if(typebits[block*32+i] != 0)
blocklen = i+1;
}
if(blocklen == 0)
continue; /* empty window should have been !in_use */
if(used+blocklen+2 > *len)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
rd[used+0] = (uint8_t)block;
rd[used+1] = (uint8_t)blocklen;
for(i=0; i<blocklen; i++) {
rd[used+2+i] = typebits[block*32+i];
}
used += blocklen+2;
}
*len = used;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_type_buf(const char* str, uint8_t* rd, size_t* len)
{
uint16_t t = sldns_get_rr_type_by_name(str);
if(t == 0 && strcmp(str, "TYPE0") != 0)
return LDNS_WIREPARSE_ERR_SYNTAX_TYPE;
if(*len < 2)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
sldns_write_uint16(rd, t);
*len = 2;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_class_buf(const char* str, uint8_t* rd, size_t* len)
{
uint16_t c = sldns_get_rr_class_by_name(str);
if(c == 0 && strcmp(str, "CLASS0") != 0)
return LDNS_WIREPARSE_ERR_SYNTAX_CLASS;
if(*len < 2)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
sldns_write_uint16(rd, c);
*len = 2;
return LDNS_WIREPARSE_ERR_OK;
}
/* An certificate alg field can either be specified as a 8 bits number
* or by its symbolic name. Handle both */
int sldns_str2wire_cert_alg_buf(const char* str, uint8_t* rd, size_t* len)
{
sldns_lookup_table *lt = sldns_lookup_by_name(sldns_cert_algorithms,
str);
if(*len < 2)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
if(lt) {
sldns_write_uint16(rd, (uint16_t)lt->id);
} else {
int s = sldns_str2wire_int16_buf(str, rd, len);
if(s) return s;
if(sldns_read_uint16(rd) == 0)
return LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM;
}
*len = 2;
return LDNS_WIREPARSE_ERR_OK;
}
/* An alg field can either be specified as a 8 bits number
* or by its symbolic name. Handle both */
int sldns_str2wire_alg_buf(const char* str, uint8_t* rd, size_t* len)
{
sldns_lookup_table *lt = sldns_lookup_by_name(sldns_algorithms, str);
if(*len < 1)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
if(lt) {
rd[0] = (uint8_t)lt->id;
*len = 1;
} else {
/* try as-is (a number) */
return sldns_str2wire_int8_buf(str, rd, len);
}
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_time_buf(const char* str, uint8_t* rd, size_t* len)
{
/* convert a time YYYYDDMMHHMMSS to wireformat */
struct tm tm;
if(*len < 4)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
/* Try to scan the time... */
memset(&tm, 0, sizeof(tm));
if (strlen(str) == 14 && sscanf(str, "%4d%2d%2d%2d%2d%2d",
&tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
&tm.tm_min, &tm.tm_sec) == 6) {
tm.tm_year -= 1900;
tm.tm_mon--;
/* Check values */
if (tm.tm_year < 70)
return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
if (tm.tm_mon < 0 || tm.tm_mon > 11)
return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
if (tm.tm_mday < 1 || tm.tm_mday > 31)
return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
if (tm.tm_hour < 0 || tm.tm_hour > 23)
return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
if (tm.tm_min < 0 || tm.tm_min > 59)
return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
if (tm.tm_sec < 0 || tm.tm_sec > 59)
return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
sldns_write_uint32(rd, (uint32_t)sldns_mktime_from_utc(&tm));
} else {
/* handle it as 32 bits timestamp */
char *end;
uint32_t l = (uint32_t)strtol((char*)str, &end, 10);
if(*end != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TIME,
end-(char*)str);
sldns_write_uint32(rd, l);
}
*len = 4;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_period_buf(const char* str, uint8_t* rd, size_t* len)
{
const char* end;
uint32_t p = sldns_str2period(str, &end);
if(*end != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_PERIOD, end-str);
if(*len < 4)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
sldns_write_uint32(rd, p);
*len = 4;
return LDNS_WIREPARSE_ERR_OK;
}
/** read "<digits>[.<digits>][mM]" into mantissa exponent format for LOC type */
static int
loc_parse_cm(char* my_str, char** endstr, uint8_t* m, uint8_t* e)
{
uint32_t meters = 0, cm = 0, val;
while (isblank((unsigned char)*my_str)) {
my_str++;
}
meters = (uint32_t)strtol(my_str, &my_str, 10);
if (*my_str == '.') {
my_str++;
cm = (uint32_t)strtol(my_str, &my_str, 10);
}
if (meters >= 1) {
*e = 2;
val = meters;
} else {
*e = 0;
val = cm;
}
while(val >= 10) {
(*e)++;
val /= 10;
}
*m = (uint8_t)val;
if (*e > 9)
return 0;
if (*my_str == 'm' || *my_str == 'M') {
my_str++;
}
*endstr = my_str;
return 1;
}
int sldns_str2wire_loc_buf(const char* str, uint8_t* rd, size_t* len)
{
uint32_t latitude = 0;
uint32_t longitude = 0;
uint32_t altitude = 0;
uint32_t equator = (uint32_t)1<<31; /* 2**31 */
/* only support version 0 */
uint32_t h = 0;
uint32_t m = 0;
uint8_t size_b = 1, size_e = 2;
uint8_t horiz_pre_b = 1, horiz_pre_e = 6;
uint8_t vert_pre_b = 1, vert_pre_e = 3;
double s = 0.0;
int northerness;
int easterness;
char *my_str = (char *) str;
if (isdigit((unsigned char) *my_str)) {
h = (uint32_t) strtol(my_str, &my_str, 10);
} else {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
while (isblank((unsigned char) *my_str)) {
my_str++;
}
if (isdigit((unsigned char) *my_str)) {
m = (uint32_t) strtol(my_str, &my_str, 10);
} else if (*my_str == 'N' || *my_str == 'S') {
goto north;
} else {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
while (isblank((unsigned char) *my_str)) {
my_str++;
}
if (isdigit((unsigned char) *my_str)) {
s = strtod(my_str, &my_str);
}
/* skip blanks before norterness */
while (isblank((unsigned char) *my_str)) {
my_str++;
}
north:
if (*my_str == 'N') {
northerness = 1;
} else if (*my_str == 'S') {
northerness = 0;
} else {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
my_str++;
/* store number */
s = 1000.0 * s;
/* add a little to make floor in conversion a round */
s += 0.0005;
latitude = (uint32_t) s;
latitude += 1000 * 60 * m;
latitude += 1000 * 60 * 60 * h;
if (northerness) {
latitude = equator + latitude;
} else {
latitude = equator - latitude;
}
while (isblank((unsigned char)*my_str)) {
my_str++;
}
if (isdigit((unsigned char) *my_str)) {
h = (uint32_t) strtol(my_str, &my_str, 10);
} else {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
while (isblank((unsigned char) *my_str)) {
my_str++;
}
if (isdigit((unsigned char) *my_str)) {
m = (uint32_t) strtol(my_str, &my_str, 10);
} else if (*my_str == 'E' || *my_str == 'W') {
goto east;
} else {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
while (isblank((unsigned char)*my_str)) {
my_str++;
}
if (isdigit((unsigned char) *my_str)) {
s = strtod(my_str, &my_str);
}
/* skip blanks before easterness */
while (isblank((unsigned char)*my_str)) {
my_str++;
}
east:
if (*my_str == 'E') {
easterness = 1;
} else if (*my_str == 'W') {
easterness = 0;
} else {
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
my_str++;
/* store number */
s *= 1000.0;
/* add a little to make floor in conversion a round */
s += 0.0005;
longitude = (uint32_t) s;
longitude += 1000 * 60 * m;
longitude += 1000 * 60 * 60 * h;
if (easterness) {
longitude += equator;
} else {
longitude = equator - longitude;
}
altitude = (uint32_t)(strtod(my_str, &my_str)*100.0 +
10000000.0 + 0.5);
if (*my_str == 'm' || *my_str == 'M') {
my_str++;
}
if (strlen(my_str) > 0) {
if(!loc_parse_cm(my_str, &my_str, &size_b, &size_e))
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
if (strlen(my_str) > 0) {
if(!loc_parse_cm(my_str, &my_str, &horiz_pre_b, &horiz_pre_e))
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
if (strlen(my_str) > 0) {
if(!loc_parse_cm(my_str, &my_str, &vert_pre_b, &vert_pre_e))
return LDNS_WIREPARSE_ERR_INVALID_STR;
}
if(*len < 16)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
rd[0] = 0;
rd[1] = ((size_b << 4) & 0xf0) | (size_e & 0x0f);
rd[2] = ((horiz_pre_b << 4) & 0xf0) | (horiz_pre_e & 0x0f);
rd[3] = ((vert_pre_b << 4) & 0xf0) | (vert_pre_e & 0x0f);
sldns_write_uint32(rd + 4, latitude);
sldns_write_uint32(rd + 8, longitude);
sldns_write_uint32(rd + 12, altitude);
*len = 16;
return LDNS_WIREPARSE_ERR_OK;
}
static void
ldns_tolower_str(char* s)
{
if(s) {
while(*s) {
*s = (char)tolower((unsigned char)*s);
s++;
}
}
}
int sldns_str2wire_wks_buf(const char* str, uint8_t* rd, size_t* len)
{
int rd_len = 1;
int have_proto = 0;
char token[50], proto_str[50];
sldns_buffer strbuf;
sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
proto_str[0]=0;
/* check we have one byte for proto */
if(*len < 1)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
while(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) > 0) {
ldns_tolower_str(token);
if(!have_proto) {
struct protoent *p = getprotobyname(token);
have_proto = 1;
if(p) rd[0] = (uint8_t)p->p_proto;
else rd[0] = (uint8_t)atoi(token);
(void)strlcpy(proto_str, token, sizeof(proto_str));
} else {
int serv_port;
struct servent *serv = getservbyname(token, proto_str);
if(serv) serv_port=(int)ntohs((uint16_t)serv->s_port);
else {
serv_port = atoi(token);
if(serv_port == 0 && strcmp(token, "0") != 0) {
#ifdef HAVE_ENDSERVENT
endservent();
#endif
#ifdef HAVE_ENDPROTOENT
endprotoent();
#endif
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX,
sldns_buffer_position(&strbuf));
}
if(serv_port < 0 || serv_port > 65535) {
#ifdef HAVE_ENDSERVENT
endservent();
#endif
#ifdef HAVE_ENDPROTOENT
endprotoent();
#endif
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX,
sldns_buffer_position(&strbuf));
}
}
if(rd_len < 1+serv_port/8+1) {
/* bitmap is larger, init new bytes at 0 */
if(*len < 1+(size_t)serv_port/8+1) {
#ifdef HAVE_ENDSERVENT
endservent();
#endif
#ifdef HAVE_ENDPROTOENT
endprotoent();
#endif
return RET_ERR(
LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(&strbuf));
}
memset(rd+rd_len, 0, 1+(size_t)serv_port/8+1-rd_len);
rd_len = 1+serv_port/8+1;
}
rd[1+ serv_port/8] |= (1 << (7 - serv_port % 8));
}
}
*len = (size_t)rd_len;
#ifdef HAVE_ENDSERVENT
endservent();
#endif
#ifdef HAVE_ENDPROTOENT
endprotoent();
#endif
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_nsap_buf(const char* str, uint8_t* rd, size_t* len)
{
const char* s = str;
size_t slen;
size_t dlen = 0; /* number of hexdigits parsed */
/* just a hex string with optional dots? */
if (s[0] != '0' || s[1] != 'x')
return LDNS_WIREPARSE_ERR_INVALID_STR;
s += 2;
slen = strlen(s);
if(slen > LDNS_MAX_RDFLEN*2)
return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
while(*s) {
if(isspace((unsigned char)*s) || *s == '.') {
s++;
continue;
}
if(!isxdigit((unsigned char)*s))
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
if(*len < dlen/2 + 1)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
s-str);
if((dlen&1)==0)
rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
else rd[dlen/2] += sldns_hexdigit_to_int(*s++);
dlen++;
}
if((dlen&1)!=0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
*len = dlen/2;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_atma_buf(const char* str, uint8_t* rd, size_t* len)
{
const char* s = str;
size_t slen = strlen(str);
size_t dlen = 0; /* number of hexdigits parsed */
/* just a hex string with optional dots? */
/* notimpl e.164 format */
if(slen > LDNS_MAX_RDFLEN*2)
return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
while(*s) {
if(isspace((unsigned char)*s) || *s == '.') {
s++;
continue;
}
if(!isxdigit((unsigned char)*s))
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
if(*len < dlen/2 + 1)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
s-str);
if((dlen&1)==0)
rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
else rd[dlen/2] += sldns_hexdigit_to_int(*s++);
dlen++;
}
if((dlen&1)!=0)
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
*len = dlen/2;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_ipseckey_buf(const char* str, uint8_t* rd, size_t* len)
{
size_t gwlen = 0, keylen = 0;
int s;
uint8_t gwtype;
char token[512];
sldns_buffer strbuf;
sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
if(*len < 3)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
/* precedence */
if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
sldns_buffer_position(&strbuf));
rd[0] = (uint8_t)atoi(token);
/* gateway_type */
if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
sldns_buffer_position(&strbuf));
rd[1] = (uint8_t)atoi(token);
gwtype = rd[1];
/* algorithm */
if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
sldns_buffer_position(&strbuf));
rd[2] = (uint8_t)atoi(token);
/* gateway */
if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
sldns_buffer_position(&strbuf));
if(gwtype == 0) {
/* NOGATEWAY */
if(strcmp(token, ".") != 0)
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
sldns_buffer_position(&strbuf));
gwlen = 0;
} else if(gwtype == 1) {
/* IP4 */
gwlen = *len - 3;
s = sldns_str2wire_a_buf(token, rd+3, &gwlen);
if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
} else if(gwtype == 2) {
/* IP6 */
gwlen = *len - 3;
s = sldns_str2wire_aaaa_buf(token, rd+3, &gwlen);
if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
} else if(gwtype == 3) {
/* DNAME */
gwlen = *len - 3;
s = sldns_str2wire_dname_buf(token, rd+3, &gwlen);
if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
} else {
/* unknown gateway type */
return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
sldns_buffer_position(&strbuf));
}
/* double check for size */
if(*len < 3 + gwlen)
return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
sldns_buffer_position(&strbuf));
/* publickey in remainder of strbuf */
keylen = *len - 3 - gwlen;
s = sldns_str2wire_b64_buf((const char*)sldns_buffer_current(&strbuf),
rd+3+gwlen, &keylen);
if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
*len = 3 + gwlen + keylen;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_nsec3_salt_buf(const char* str, uint8_t* rd, size_t* len)
{
int i, salt_length_str = (int)strlen(str);
if (salt_length_str == 1 && str[0] == '-') {
salt_length_str = 0;
} else if (salt_length_str % 2 != 0) {
return LDNS_WIREPARSE_ERR_SYNTAX_HEX;
}
if (salt_length_str > 512)
return LDNS_WIREPARSE_ERR_SYNTAX_HEX;
if(*len < 1+(size_t)salt_length_str / 2)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
rd[0] = (uint8_t) (salt_length_str / 2);
for (i = 0; i < salt_length_str; i += 2) {
if (isxdigit((unsigned char)str[i]) &&
isxdigit((unsigned char)str[i+1])) {
rd[1+i/2] = (uint8_t)(sldns_hexdigit_to_int(str[i])*16
+ sldns_hexdigit_to_int(str[i+1]));
} else {
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, i);
}
}
*len = 1 + (size_t)rd[0];
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_ilnp64_buf(const char* str, uint8_t* rd, size_t* len)
{
unsigned int a, b, c, d;
uint16_t shorts[4];
int l;
if(*len < sizeof(shorts))
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
if (sscanf(str, "%4x:%4x:%4x:%4x%n", &a, &b, &c, &d, &l) != 4 ||
l != (int)strlen(str) || /* more data to read */
strpbrk(str, "+-") /* signed hexes */
)
return LDNS_WIREPARSE_ERR_SYNTAX_ILNP64;
shorts[0] = htons(a);
shorts[1] = htons(b);
shorts[2] = htons(c);
shorts[3] = htons(d);
memmove(rd, &shorts, sizeof(shorts));
*len = sizeof(shorts);
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_eui48_buf(const char* str, uint8_t* rd, size_t* len)
{
unsigned int a, b, c, d, e, f;
int l;
if(*len < 6)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x%n",
&a, &b, &c, &d, &e, &f, &l) != 6 ||
l != (int)strlen(str))
return LDNS_WIREPARSE_ERR_SYNTAX_EUI48;
rd[0] = a;
rd[1] = b;
rd[2] = c;
rd[3] = d;
rd[4] = e;
rd[5] = f;
*len = 6;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_eui64_buf(const char* str, uint8_t* rd, size_t* len)
{
unsigned int a, b, c, d, e, f, g, h;
int l;
if(*len < 8)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x-%2x-%2x%n",
&a, &b, &c, &d, &e, &f, &g, &h, &l) != 8 ||
l != (int)strlen(str))
return LDNS_WIREPARSE_ERR_SYNTAX_EUI64;
rd[0] = a;
rd[1] = b;
rd[2] = c;
rd[3] = d;
rd[4] = e;
rd[5] = f;
rd[6] = g;
rd[7] = h;
*len = 8;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_tag_buf(const char* str, uint8_t* rd, size_t* len)
{
size_t slen = strlen(str);
const char* ptr;
if (slen > 255)
return LDNS_WIREPARSE_ERR_SYNTAX_TAG;
if(*len < slen+1)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
for (ptr = str; *ptr; ptr++) {
if(!isalnum((unsigned char)*ptr))
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TAG, ptr-str);
}
rd[0] = (uint8_t)slen;
memmove(rd+1, str, slen);
*len = slen+1;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_long_str_buf(const char* str, uint8_t* rd, size_t* len)
{
uint8_t ch = 0;
const char* pstr = str;
size_t length = 0;
/* Fill data with parsed bytes */
while (sldns_parse_char(&ch, &pstr)) {
if(*len < length+1)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
rd[length++] = ch;
}
if(!pstr)
return LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE;
*len = length;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_hip_buf(const char* str, uint8_t* rd, size_t* len)
{
char* s, *end;
int e;
size_t hitlen, pklen = 0;
/* presentation format:
* pk-algo HIThex pubkeybase64
* wireformat:
* hitlen[1byte] pkalgo[1byte] pubkeylen[2byte] [hit] [pubkey] */
if(*len < 4)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
/* read PK algorithm */
rd[1] = (uint8_t)strtol((char*)str, &s, 10);
if(*s != ' ')
return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, s-(char*)str);
s++;
while(*s == ' ')
s++;
/* read HIT hex tag */
/* zero terminate the tag (replace later) */
end = strchr(s, ' ');
if(!end) return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, s-(char*)str);
*end = 0;
hitlen = *len - 4;
if((e = sldns_str2wire_hex_buf(s, rd+4, &hitlen)) != 0) {
*end = ' ';
return RET_ERR_SHIFT(e, s-(char*)str);
}
if(hitlen > 255) {
*end = ' ';
return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, s-(char*)str+255*2);
}
rd[0] = (uint8_t)hitlen;
*end = ' ';
s = end+1;
/* read pubkey base64 sequence */
pklen = *len - 4 - hitlen;
if((e = sldns_str2wire_b64_buf(s, rd+4+hitlen, &pklen)) != 0)
return RET_ERR_SHIFT(e, s-(char*)str);
if(pklen > 65535)
return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, s-(char*)str+65535);
sldns_write_uint16(rd+2, (uint16_t)pklen);
*len = 4 + hitlen + pklen;
return LDNS_WIREPARSE_ERR_OK;
}
int sldns_str2wire_int16_data_buf(const char* str, uint8_t* rd, size_t* len)
{
size_t sz = sldns_b64_pton_calculate_size(strlen(str));
int n;
if(*len < sz+2)
return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
if(sz > 65535)
return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
n = sldns_b64_pton(str, rd+2, (*len)-2);
if(n < 0)
return LDNS_WIREPARSE_ERR_SYNTAX_B64;
sldns_write_uint16(rd, (uint16_t)n);
*len = (size_t)n;
return LDNS_WIREPARSE_ERR_OK;
}
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