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danicoin/external/unbound/sldns/wire2str.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

2007 lines
55 KiB
C
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/*
* wire2str.c
*
* conversion routines from the wire format
* to the presentation format (strings)
*
* (c) NLnet Labs, 2004-2006
*
* See the file LICENSE for the license
*/
/**
* \file
*
* Contains functions to translate the wireformat to text
* representation, as well as functions to print them.
*/
#include "config.h"
#include "sldns/wire2str.h"
#include "sldns/str2wire.h"
#include "sldns/rrdef.h"
#include "sldns/pkthdr.h"
#include "sldns/parseutil.h"
#include "sldns/sbuffer.h"
#include "sldns/keyraw.h"
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <sys/time.h>
#include <stdarg.h>
#include <ctype.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
/* lookup tables for standard DNS stuff */
/* Taken from RFC 2535, section 7. */
static sldns_lookup_table sldns_algorithms_data[] = {
{ LDNS_RSAMD5, "RSAMD5" },
{ LDNS_DH, "DH" },
{ LDNS_DSA, "DSA" },
{ LDNS_ECC, "ECC" },
{ LDNS_RSASHA1, "RSASHA1" },
{ LDNS_DSA_NSEC3, "DSA-NSEC3-SHA1" },
{ LDNS_RSASHA1_NSEC3, "RSASHA1-NSEC3-SHA1" },
{ LDNS_RSASHA256, "RSASHA256"},
{ LDNS_RSASHA512, "RSASHA512"},
{ LDNS_ECC_GOST, "ECC-GOST"},
{ LDNS_ECDSAP256SHA256, "ECDSAP256SHA256"},
{ LDNS_ECDSAP384SHA384, "ECDSAP384SHA384"},
{ LDNS_ED25519, "ED25519"},
{ LDNS_ED448, "ED448"},
{ LDNS_INDIRECT, "INDIRECT" },
{ LDNS_PRIVATEDNS, "PRIVATEDNS" },
{ LDNS_PRIVATEOID, "PRIVATEOID" },
{ 0, NULL }
};
sldns_lookup_table* sldns_algorithms = sldns_algorithms_data;
/* hash algorithms in DS record */
static sldns_lookup_table sldns_hashes_data[] = {
{ LDNS_SHA1, "SHA1" },
{ LDNS_SHA256, "SHA256" },
{ LDNS_HASH_GOST, "HASH-GOST" },
{ LDNS_SHA384, "SHA384" },
{ 0, NULL }
};
sldns_lookup_table* sldns_hashes = sldns_hashes_data;
/* Taken from RFC 4398 */
static sldns_lookup_table sldns_cert_algorithms_data[] = {
{ LDNS_CERT_PKIX, "PKIX" },
{ LDNS_CERT_SPKI, "SPKI" },
{ LDNS_CERT_PGP, "PGP" },
{ LDNS_CERT_IPKIX, "IPKIX" },
{ LDNS_CERT_ISPKI, "ISPKI" },
{ LDNS_CERT_IPGP, "IPGP" },
{ LDNS_CERT_ACPKIX, "ACPKIX" },
{ LDNS_CERT_IACPKIX, "IACPKIX" },
{ LDNS_CERT_URI, "URI" },
{ LDNS_CERT_OID, "OID" },
{ 0, NULL }
};
sldns_lookup_table* sldns_cert_algorithms = sldns_cert_algorithms_data;
/* if these are used elsewhere */
static sldns_lookup_table sldns_rcodes_data[] = {
{ LDNS_RCODE_NOERROR, "NOERROR" },
{ LDNS_RCODE_FORMERR, "FORMERR" },
{ LDNS_RCODE_SERVFAIL, "SERVFAIL" },
{ LDNS_RCODE_NXDOMAIN, "NXDOMAIN" },
{ LDNS_RCODE_NOTIMPL, "NOTIMPL" },
{ LDNS_RCODE_REFUSED, "REFUSED" },
{ LDNS_RCODE_YXDOMAIN, "YXDOMAIN" },
{ LDNS_RCODE_YXRRSET, "YXRRSET" },
{ LDNS_RCODE_NXRRSET, "NXRRSET" },
{ LDNS_RCODE_NOTAUTH, "NOTAUTH" },
{ LDNS_RCODE_NOTZONE, "NOTZONE" },
{ 0, NULL }
};
sldns_lookup_table* sldns_rcodes = sldns_rcodes_data;
static sldns_lookup_table sldns_opcodes_data[] = {
{ LDNS_PACKET_QUERY, "QUERY" },
{ LDNS_PACKET_IQUERY, "IQUERY" },
{ LDNS_PACKET_STATUS, "STATUS" },
{ LDNS_PACKET_NOTIFY, "NOTIFY" },
{ LDNS_PACKET_UPDATE, "UPDATE" },
{ 0, NULL }
};
sldns_lookup_table* sldns_opcodes = sldns_opcodes_data;
static sldns_lookup_table sldns_wireparse_errors_data[] = {
{ LDNS_WIREPARSE_ERR_OK, "no parse error" },
{ LDNS_WIREPARSE_ERR_GENERAL, "parse error" },
{ LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, "Domainname length overflow" },
{ LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW, "Domainname length underflow (zero length)" },
{ LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, "buffer too small" },
{ LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, "Label length overflow" },
{ LDNS_WIREPARSE_ERR_EMPTY_LABEL, "Empty label" },
{ LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE, "Syntax error, bad escape sequence" },
{ LDNS_WIREPARSE_ERR_SYNTAX, "Syntax error, could not parse the RR" },
{ LDNS_WIREPARSE_ERR_SYNTAX_TTL, "Syntax error, could not parse the RR's TTL" },
{ LDNS_WIREPARSE_ERR_SYNTAX_TYPE, "Syntax error, could not parse the RR's type" },
{ LDNS_WIREPARSE_ERR_SYNTAX_CLASS, "Syntax error, could not parse the RR's class" },
{ LDNS_WIREPARSE_ERR_SYNTAX_RDATA, "Syntax error, could not parse the RR's rdata" },
{ LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE, "Syntax error, value expected" },
{ LDNS_WIREPARSE_ERR_INVALID_STR, "Conversion error, string expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_B64, "Conversion error, b64 encoding expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT, "Conversion error, b32 ext encoding expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_HEX, "Conversion error, hex encoding expected" },
{ LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM, "Bad algorithm type for CERT record" },
{ LDNS_WIREPARSE_ERR_SYNTAX_TIME, "Conversion error, time encoding expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_PERIOD, "Conversion error, time period encoding expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_ILNP64, "Conversion error, 4 colon separated hex numbers expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_EUI48,
"Conversion error, 6 two character hex numbers "
"separated by dashes expected (i.e. xx-xx-xx-xx-xx-xx" },
{ LDNS_WIREPARSE_ERR_SYNTAX_EUI64,
"Conversion error, 8 two character hex numbers "
"separated by dashes expected (i.e. xx-xx-xx-xx-xx-xx-xx-xx" },
{ LDNS_WIREPARSE_ERR_SYNTAX_TAG,
"Conversion error, a non-zero sequence of US-ASCII letters "
"and numbers in lower case expected" },
{ LDNS_WIREPARSE_ERR_NOT_IMPL, "not implemented" },
{ LDNS_WIREPARSE_ERR_SYNTAX_INT, "Conversion error, integer expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_IP4, "Conversion error, ip4 addr expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_IP6, "Conversion error, ip6 addr expected" },
{ LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW, "Syntax error, integer overflow" },
{ LDNS_WIREPARSE_ERR_INCLUDE, "$INCLUDE directive was seen in the zone" },
{ LDNS_WIREPARSE_ERR_PARENTHESIS, "Parse error, parenthesis mismatch" },
{ 0, NULL }
};
sldns_lookup_table* sldns_wireparse_errors = sldns_wireparse_errors_data;
static sldns_lookup_table sldns_edns_flags_data[] = {
{ 3600, "do"},
{ 0, NULL}
};
sldns_lookup_table* sldns_edns_flags = sldns_edns_flags_data;
static sldns_lookup_table sldns_edns_options_data[] = {
{ 1, "LLQ" },
{ 2, "UL" },
{ 3, "NSID" },
/* 4 draft-cheshire-edns0-owner-option */
{ 5, "DAU" },
{ 6, "DHU" },
{ 7, "N3U" },
{ 8, "edns-client-subnet" },
{ 11, "edns-tcp-keepalive"},
{ 12, "Padding" },
{ 0, NULL}
};
sldns_lookup_table* sldns_edns_options = sldns_edns_options_data;
char* sldns_wire2str_pkt(uint8_t* data, size_t len)
{
size_t slen = (size_t)sldns_wire2str_pkt_buf(data, len, NULL, 0);
char* result = (char*)malloc(slen+1);
if(!result) return NULL;
sldns_wire2str_pkt_buf(data, len, result, slen+1);
return result;
}
char* sldns_wire2str_rr(uint8_t* rr, size_t len)
{
size_t slen = (size_t)sldns_wire2str_rr_buf(rr, len, NULL, 0);
char* result = (char*)malloc(slen+1);
if(!result) return NULL;
sldns_wire2str_rr_buf(rr, len, result, slen+1);
return result;
}
char* sldns_wire2str_type(uint16_t rrtype)
{
char buf[16];
sldns_wire2str_type_buf(rrtype, buf, sizeof(buf));
return strdup(buf);
}
char* sldns_wire2str_class(uint16_t rrclass)
{
char buf[16];
sldns_wire2str_class_buf(rrclass, buf, sizeof(buf));
return strdup(buf);
}
char* sldns_wire2str_dname(uint8_t* dname, size_t dname_len)
{
size_t slen=(size_t)sldns_wire2str_dname_buf(dname, dname_len, NULL, 0);
char* result = (char*)malloc(slen+1);
if(!result) return NULL;
sldns_wire2str_dname_buf(dname, dname_len, result, slen+1);
return result;
}
char* sldns_wire2str_rcode(int rcode)
{
char buf[16];
sldns_wire2str_rcode_buf(rcode, buf, sizeof(buf));
return strdup(buf);
}
int sldns_wire2str_pkt_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_pkt_scan(&d, &dlen, &s, &slen);
}
int sldns_wire2str_rr_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_rr_scan(&d, &dlen, &s, &slen, NULL, 0);
}
int sldns_wire2str_rdata_buf(uint8_t* rdata, size_t rdata_len, char* str,
size_t str_len, uint16_t rrtype)
{
/* use arguments as temporary variables */
return sldns_wire2str_rdata_scan(&rdata, &rdata_len, &str, &str_len,
rrtype, NULL, 0);
}
int sldns_wire2str_rr_unknown_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_rr_unknown_scan(&d, &dlen, &s, &slen, NULL, 0);
}
int sldns_wire2str_rr_comment_buf(uint8_t* rr, size_t rrlen, size_t dname_len,
char* s, size_t slen)
{
uint16_t rrtype = sldns_wirerr_get_type(rr, rrlen, dname_len);
return sldns_wire2str_rr_comment_print(&s, &slen, rr, rrlen, dname_len,
rrtype);
}
int sldns_wire2str_type_buf(uint16_t rrtype, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_type_print(&s, &slen, rrtype);
}
int sldns_wire2str_class_buf(uint16_t rrclass, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_class_print(&s, &slen, rrclass);
}
int sldns_wire2str_rcode_buf(int rcode, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_rcode_print(&s, &slen, rcode);
}
int sldns_wire2str_opcode_buf(int opcode, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_opcode_print(&s, &slen, opcode);
}
int sldns_wire2str_dname_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
{
/* use arguments as temporary variables */
return sldns_wire2str_dname_scan(&d, &dlen, &s, &slen, NULL, 0);
}
int sldns_str_vprint(char** str, size_t* slen, const char* format, va_list args)
{
int w = vsnprintf(*str, *slen, format, args);
if(w < 0) {
/* error in printout */
return 0;
} else if((size_t)w >= *slen) {
*str = NULL; /* we do not want str to point outside of buffer*/
*slen = 0;
} else {
*str += w;
*slen -= w;
}
return w;
}
int sldns_str_print(char** str, size_t* slen, const char* format, ...)
{
int w;
va_list args;
va_start(args, format);
w = sldns_str_vprint(str, slen, format, args);
va_end(args);
return w;
}
/** print hex format into text buffer for specified length */
static int print_hex_buf(char** s, size_t* slen, uint8_t* buf, size_t len)
{
const char* hex = "0123456789ABCDEF";
size_t i;
for(i=0; i<len; i++) {
(void)sldns_str_print(s, slen, "%c%c", hex[(buf[i]&0xf0)>>4],
hex[buf[i]&0x0f]);
}
return (int)len*2;
}
/** print remainder of buffer in hex format with prefixed text */
static int print_remainder_hex(const char* pref, uint8_t** d, size_t* dlen,
char** s, size_t* slen)
{
int w = 0;
w += sldns_str_print(s, slen, "%s", pref);
w += print_hex_buf(s, slen, *d, *dlen);
*d += *dlen;
*dlen = 0;
return w;
}
int sldns_wire2str_pkt_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
{
int w = 0;
unsigned qdcount, ancount, nscount, arcount, i;
uint8_t* pkt = *d;
size_t pktlen = *dlen;
if(*dlen >= LDNS_HEADER_SIZE) {
qdcount = (unsigned)LDNS_QDCOUNT(*d);
ancount = (unsigned)LDNS_ANCOUNT(*d);
nscount = (unsigned)LDNS_NSCOUNT(*d);
arcount = (unsigned)LDNS_ARCOUNT(*d);
} else {
qdcount = ancount = nscount = arcount = 0;
}
w += sldns_wire2str_header_scan(d, dlen, s, slen);
w += sldns_str_print(s, slen, "\n");
w += sldns_str_print(s, slen, ";; QUESTION SECTION:\n");
for(i=0; i<qdcount; i++) {
w += sldns_wire2str_rrquestion_scan(d, dlen, s, slen,
pkt, pktlen);
if(!*dlen) break;
}
w += sldns_str_print(s, slen, "\n");
w += sldns_str_print(s, slen, ";; ANSWER SECTION:\n");
for(i=0; i<ancount; i++) {
w += sldns_wire2str_rr_scan(d, dlen, s, slen, pkt, pktlen);
if(!*dlen) break;
}
w += sldns_str_print(s, slen, "\n");
w += sldns_str_print(s, slen, ";; AUTHORITY SECTION:\n");
for(i=0; i<nscount; i++) {
w += sldns_wire2str_rr_scan(d, dlen, s, slen, pkt, pktlen);
if(!*dlen) break;
}
w += sldns_str_print(s, slen, "\n");
w += sldns_str_print(s, slen, ";; ADDITIONAL SECTION:\n");
for(i=0; i<arcount; i++) {
w += sldns_wire2str_rr_scan(d, dlen, s, slen, pkt, pktlen);
if(!*dlen) break;
}
/* other fields: WHEN(time), SERVER(IP) not available here. */
w += sldns_str_print(s, slen, ";; MSG SIZE rcvd: %d\n", (int)pktlen);
if(*dlen > 0) {
w += print_remainder_hex(";; trailing garbage 0x",
d, dlen, s, slen);
w += sldns_str_print(s, slen, "\n");
}
return w;
}
/** scan type, class and ttl and printout, for rr */
static int sldns_rr_tcttl_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w = 0;
uint16_t t, c;
uint32_t ttl;
if(*dl < 8) {
if(*dl < 4)
return w + print_remainder_hex("; Error malformed 0x",
d, dl, s, sl);
/* these print values or 0x.. if none left */
t = sldns_read_uint16(*d);
c = sldns_read_uint16((*d)+2);
(*d)+=4;
(*dl)-=4;
w += sldns_wire2str_class_print(s, sl, c);
w += sldns_str_print(s, sl, "\t");
w += sldns_wire2str_type_print(s, sl, t);
if(*dl == 0)
return w + sldns_str_print(s, sl, "; Error no ttl");
return w + print_remainder_hex(
"; Error malformed ttl 0x", d, dl, s, sl);
}
t = sldns_read_uint16(*d);
c = sldns_read_uint16((*d)+2);
ttl = sldns_read_uint32((*d)+4);
(*d)+=8;
(*dl)-=8;
w += sldns_str_print(s, sl, "%lu\t", (unsigned long)ttl);
w += sldns_wire2str_class_print(s, sl, c);
w += sldns_str_print(s, sl, "\t");
w += sldns_wire2str_type_print(s, sl, t);
return w;
}
int sldns_wire2str_rr_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
uint8_t* pkt, size_t pktlen)
{
int w = 0;
uint8_t* rr = *d;
size_t rrlen = *dlen, dname_off, rdlen, ordlen;
uint16_t rrtype = 0;
if(*dlen >= 3 && (*d)[0]==0 &&
sldns_read_uint16((*d)+1)==LDNS_RR_TYPE_OPT) {
/* perform EDNS OPT processing */
return sldns_wire2str_edns_scan(d, dlen, s, slen, pkt, pktlen);
}
/* try to scan the rdata with pretty-printing, but if that fails, then
* scan the rdata as an unknown RR type */
w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
w += sldns_str_print(s, slen, "\t");
dname_off = rrlen-(*dlen);
if(*dlen == 4) {
/* like a question-RR */
uint16_t t = sldns_read_uint16(*d);
uint16_t c = sldns_read_uint16((*d)+2);
(*d)+=4;
(*dlen)-=4;
w += sldns_wire2str_class_print(s, slen, c);
w += sldns_str_print(s, slen, "\t");
w += sldns_wire2str_type_print(s, slen, t);
w += sldns_str_print(s, slen, " ; Error no ttl,rdata\n");
return w;
}
if(*dlen < 8) {
if(*dlen == 0)
return w + sldns_str_print(s, slen, ";Error missing RR\n");
w += print_remainder_hex(";Error partial RR 0x", d, dlen, s, slen);
return w + sldns_str_print(s, slen, "\n");
}
rrtype = sldns_read_uint16(*d);
w += sldns_rr_tcttl_scan(d, dlen, s, slen);
w += sldns_str_print(s, slen, "\t");
/* rdata */
if(*dlen < 2) {
if(*dlen == 0)
return w + sldns_str_print(s, slen, ";Error missing rdatalen\n");
w += print_remainder_hex(";Error missing rdatalen 0x",
d, dlen, s, slen);
return w + sldns_str_print(s, slen, "\n");
}
rdlen = sldns_read_uint16(*d);
ordlen = rdlen;
(*d)+=2;
(*dlen)-=2;
if(*dlen < rdlen) {
w += sldns_str_print(s, slen, "\\# %u ", (unsigned)rdlen);
if(*dlen == 0)
return w + sldns_str_print(s, slen, ";Error missing rdata\n");
w += print_remainder_hex(";Error partial rdata 0x", d, dlen, s, slen);
return w + sldns_str_print(s, slen, "\n");
}
w += sldns_wire2str_rdata_scan(d, &rdlen, s, slen, rrtype, pkt, pktlen);
(*dlen) -= (ordlen-rdlen);
/* default comment */
w += sldns_wire2str_rr_comment_print(s, slen, rr, rrlen, dname_off,
rrtype);
w += sldns_str_print(s, slen, "\n");
return w;
}
int sldns_wire2str_rrquestion_scan(uint8_t** d, size_t* dlen, char** s,
size_t* slen, uint8_t* pkt, size_t pktlen)
{
int w = 0;
uint16_t t, c;
w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
w += sldns_str_print(s, slen, "\t");
if(*dlen < 4) {
if(*dlen == 0)
return w + sldns_str_print(s, slen, "Error malformed\n");
w += print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
return w + sldns_str_print(s, slen, "\n");
}
t = sldns_read_uint16(*d);
c = sldns_read_uint16((*d)+2);
(*d)+=4;
(*dlen)-=4;
w += sldns_wire2str_class_print(s, slen, c);
w += sldns_str_print(s, slen, "\t");
w += sldns_wire2str_type_print(s, slen, t);
w += sldns_str_print(s, slen, "\n");
return w;
}
int sldns_wire2str_rr_unknown_scan(uint8_t** d, size_t* dlen, char** s,
size_t* slen, uint8_t* pkt, size_t pktlen)
{
size_t rdlen, ordlen;
int w = 0;
w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
w += sldns_str_print(s, slen, "\t");
w += sldns_rr_tcttl_scan(d, dlen, s, slen);
w += sldns_str_print(s, slen, "\t");
if(*dlen < 2) {
if(*dlen == 0)
return w + sldns_str_print(s, slen, ";Error missing rdatalen\n");
w += print_remainder_hex(";Error missing rdatalen 0x",
d, dlen, s, slen);
return w + sldns_str_print(s, slen, "\n");
}
rdlen = sldns_read_uint16(*d);
ordlen = rdlen;
(*d) += 2;
(*dlen) -= 2;
if(*dlen < rdlen) {
w += sldns_str_print(s, slen, "\\# %u ", (unsigned)rdlen);
if(*dlen == 0)
return w + sldns_str_print(s, slen, ";Error missing rdata\n");
w += print_remainder_hex(";Error partial rdata 0x", d, dlen, s, slen);
return w + sldns_str_print(s, slen, "\n");
}
w += sldns_wire2str_rdata_unknown_scan(d, &rdlen, s, slen);
(*dlen) -= (ordlen-rdlen);
w += sldns_str_print(s, slen, "\n");
return w;
}
/** print rr comment for type DNSKEY */
static int rr_comment_dnskey(char** s, size_t* slen, uint8_t* rr,
size_t rrlen, size_t dname_off)
{
size_t rdlen;
uint8_t* rdata;
int flags, w = 0;
if(rrlen < dname_off + 10) return 0;
rdlen = sldns_read_uint16(rr+dname_off+8);
if(rrlen < dname_off + 10 + rdlen) return 0;
rdata = rr + dname_off + 10;
flags = (int)sldns_read_uint16(rdata);
w += sldns_str_print(s, slen, " ;{");
/* id */
w += sldns_str_print(s, slen, "id = %u",
sldns_calc_keytag_raw(rdata, rdlen));
/* flags */
if((flags&LDNS_KEY_ZONE_KEY)) {
if((flags&LDNS_KEY_SEP_KEY))
w += sldns_str_print(s, slen, " (ksk)");
else w += sldns_str_print(s, slen, " (zsk)");
}
/* keysize */
if(rdlen > 4) {
w += sldns_str_print(s, slen, ", ");
w += sldns_str_print(s, slen, "size = %db",
(int)sldns_rr_dnskey_key_size_raw(
(unsigned char*)rdata+4, rdlen-4, (int)(rdata[3])));
}
w += sldns_str_print(s, slen, "}");
return w;
}
/** print rr comment for type RRSIG */
static int rr_comment_rrsig(char** s, size_t* slen, uint8_t* rr,
size_t rrlen, size_t dname_off)
{
size_t rdlen;
uint8_t* rdata;
if(rrlen < dname_off + 10) return 0;
rdlen = sldns_read_uint16(rr+dname_off+8);
if(rrlen < dname_off + 10 + rdlen) return 0;
rdata = rr + dname_off + 10;
if(rdlen < 18) return 0;
return sldns_str_print(s, slen, " ;{id = %d}",
(int)sldns_read_uint16(rdata+16));
}
/** print rr comment for type NSEC3 */
static int rr_comment_nsec3(char** s, size_t* slen, uint8_t* rr,
size_t rrlen, size_t dname_off)
{
size_t rdlen;
uint8_t* rdata;
int w = 0;
if(rrlen < dname_off + 10) return 0;
rdlen = sldns_read_uint16(rr+dname_off+8);
if(rrlen < dname_off + 10 + rdlen) return 0;
rdata = rr + dname_off + 10;
if(rdlen < 2) return 0;
if((rdata[1] & LDNS_NSEC3_VARS_OPTOUT_MASK))
w += sldns_str_print(s, slen, " ;{flags: optout}");
return w;
}
int sldns_wire2str_rr_comment_print(char** s, size_t* slen, uint8_t* rr,
size_t rrlen, size_t dname_off, uint16_t rrtype)
{
if(rrtype == LDNS_RR_TYPE_DNSKEY) {
return rr_comment_dnskey(s, slen, rr, rrlen, dname_off);
} else if(rrtype == LDNS_RR_TYPE_RRSIG) {
return rr_comment_rrsig(s, slen, rr, rrlen, dname_off);
} else if(rrtype == LDNS_RR_TYPE_NSEC3) {
return rr_comment_nsec3(s, slen, rr, rrlen, dname_off);
}
return 0;
}
int sldns_wire2str_header_scan(uint8_t** d, size_t* dlen, char** s,
size_t* slen)
{
int w = 0;
int opcode, rcode;
w += sldns_str_print(s, slen, ";; ->>HEADER<<- ");
if(*dlen == 0)
return w+sldns_str_print(s, slen, "Error empty packet");
if(*dlen < 4)
return w+print_remainder_hex("Error header too short 0x", d, dlen, s, slen);
opcode = (int)LDNS_OPCODE_WIRE(*d);
rcode = (int)LDNS_RCODE_WIRE(*d);
w += sldns_str_print(s, slen, "opcode: ");
w += sldns_wire2str_opcode_print(s, slen, opcode);
w += sldns_str_print(s, slen, ", ");
w += sldns_str_print(s, slen, "rcode: ");
w += sldns_wire2str_rcode_print(s, slen, rcode);
w += sldns_str_print(s, slen, ", ");
w += sldns_str_print(s, slen, "id: %d\n", (int)LDNS_ID_WIRE(*d));
w += sldns_str_print(s, slen, ";; flags:");
if(LDNS_QR_WIRE(*d)) w += sldns_str_print(s, slen, " qr");
if(LDNS_AA_WIRE(*d)) w += sldns_str_print(s, slen, " aa");
if(LDNS_TC_WIRE(*d)) w += sldns_str_print(s, slen, " tc");
if(LDNS_RD_WIRE(*d)) w += sldns_str_print(s, slen, " rd");
if(LDNS_CD_WIRE(*d)) w += sldns_str_print(s, slen, " cd");
if(LDNS_RA_WIRE(*d)) w += sldns_str_print(s, slen, " ra");
if(LDNS_AD_WIRE(*d)) w += sldns_str_print(s, slen, " ad");
if(LDNS_Z_WIRE(*d)) w += sldns_str_print(s, slen, " z");
w += sldns_str_print(s, slen, " ; ");
if(*dlen < LDNS_HEADER_SIZE)
return w+print_remainder_hex("Error header too short 0x", d, dlen, s, slen);
w += sldns_str_print(s, slen, "QUERY: %d, ", (int)LDNS_QDCOUNT(*d));
w += sldns_str_print(s, slen, "ANSWER: %d, ", (int)LDNS_ANCOUNT(*d));
w += sldns_str_print(s, slen, "AUTHORITY: %d, ", (int)LDNS_NSCOUNT(*d));
w += sldns_str_print(s, slen, "ADDITIONAL: %d ", (int)LDNS_ARCOUNT(*d));
*d += LDNS_HEADER_SIZE;
*dlen -= LDNS_HEADER_SIZE;
return w;
}
int sldns_wire2str_rdata_scan(uint8_t** d, size_t* dlen, char** s,
size_t* slen, uint16_t rrtype, uint8_t* pkt, size_t pktlen)
{
/* try to prettyprint, but if that fails, use unknown format */
uint8_t* origd = *d;
char* origs = *s;
size_t origdlen = *dlen, origslen = *slen;
size_t r_cnt, r_max;
sldns_rdf_type rdftype;
int w = 0, n;
const sldns_rr_descriptor *desc = sldns_rr_descript(rrtype);
if(!desc) /* unknown format */
return sldns_wire2str_rdata_unknown_scan(d, dlen, s, slen);
/* dlen equals the rdatalen for the rdata */
r_max = sldns_rr_descriptor_maximum(desc);
for(r_cnt=0; r_cnt < r_max; r_cnt++) {
if(*dlen == 0) {
if(r_cnt < sldns_rr_descriptor_minimum(desc))
goto failed;
break; /* nothing more to print */
}
rdftype = sldns_rr_descriptor_field_type(desc, r_cnt);
if(r_cnt != 0)
w += sldns_str_print(s, slen, " ");
n = sldns_wire2str_rdf_scan(d, dlen, s, slen, rdftype,
pkt, pktlen);
if(n == -1) {
failed:
/* failed, use unknown format */
*d = origd; *s = origs;
*dlen = origdlen; *slen = origslen;
return sldns_wire2str_rdata_unknown_scan(d, dlen,
s, slen);
}
w += n;
}
if(*dlen != 0) {
goto failed;
}
return w;
}
int sldns_wire2str_rdata_unknown_scan(uint8_t** d, size_t* dlen, char** s,
size_t* slen)
{
int w = 0;
/* print length */
w += sldns_str_print(s, slen, "\\# %u", (unsigned)*dlen);
/* print rdlen in hex */
if(*dlen != 0)
w += sldns_str_print(s, slen, " ");
w += print_hex_buf(s, slen, *d, *dlen);
(*d) += *dlen;
(*dlen) = 0;
return w;
}
/** print and escape one character for a domain dname */
static int dname_char_print(char** s, size_t* slen, uint8_t c)
{
if(c == '.' || c == ';' || c == '(' || c == ')' || c == '\\')
return sldns_str_print(s, slen, "\\%c", c);
else if(!(isascii((unsigned char)c) && isgraph((unsigned char)c)))
return sldns_str_print(s, slen, "\\%03u", (unsigned)c);
/* plain printout */
if(*slen) {
**s = (char)c;
(*s)++;
(*slen)--;
}
return 1;
}
int sldns_wire2str_dname_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
uint8_t* pkt, size_t pktlen)
{
int w = 0;
/* spool labels onto the string, use compression if its there */
uint8_t* pos = *d;
unsigned i, counter=0;
const unsigned maxcompr = 1000; /* loop detection, max compr ptrs */
int in_buf = 1;
if(*dlen == 0) return sldns_str_print(s, slen, "ErrorMissingDname");
if(*pos == 0) {
(*d)++;
(*dlen)--;
return sldns_str_print(s, slen, ".");
}
while(*pos) {
/* read label length */
uint8_t labellen = *pos++;
if(in_buf) { (*d)++; (*dlen)--; }
/* find out what sort of label we have */
if((labellen&0xc0) == 0xc0) {
/* compressed */
uint16_t target = 0;
if(in_buf && *dlen == 0)
return w + sldns_str_print(s, slen,
"ErrorPartialDname");
else if(!in_buf && pos+1 > pkt+pktlen)
return w + sldns_str_print(s, slen,
"ErrorPartialDname");
target = ((labellen&0x3f)<<8) | *pos;
if(in_buf) { (*d)++; (*dlen)--; }
/* move to target, if possible */
if(!pkt || target >= pktlen)
return w + sldns_str_print(s, slen,
"ErrorComprPtrOutOfBounds");
if(counter++ > maxcompr)
return w + sldns_str_print(s, slen,
"ErrorComprPtrLooped");
in_buf = 0;
pos = pkt+target;
continue;
} else if((labellen&0xc0)) {
/* notimpl label type */
w += sldns_str_print(s, slen,
"ErrorLABELTYPE%xIsUnknown",
(int)(labellen&0xc0));
return w;
}
/* spool label characters, end with '.' */
if(in_buf && *dlen < (size_t)labellen)
labellen = (uint8_t)*dlen;
else if(!in_buf && pos+(size_t)labellen > pkt+pktlen)
labellen = (uint8_t)(pkt + pktlen - pos);
for(i=0; i<(unsigned)labellen; i++) {
w += dname_char_print(s, slen, *pos++);
}
if(in_buf) {
(*d) += labellen;
(*dlen) -= labellen;
if(*dlen == 0) break;
}
w += sldns_str_print(s, slen, ".");
}
/* skip over final root label */
if(in_buf && *dlen > 0) { (*d)++; (*dlen)--; }
/* in case we printed no labels, terminate dname */
if(w == 0) w += sldns_str_print(s, slen, ".");
return w;
}
int sldns_wire2str_opcode_print(char** s, size_t* slen, int opcode)
{
sldns_lookup_table *lt = sldns_lookup_by_id(sldns_opcodes, opcode);
if (lt && lt->name) {
return sldns_str_print(s, slen, "%s", lt->name);
}
return sldns_str_print(s, slen, "OPCODE%u", (unsigned)opcode);
}
int sldns_wire2str_rcode_print(char** s, size_t* slen, int rcode)
{
sldns_lookup_table *lt = sldns_lookup_by_id(sldns_rcodes, rcode);
if (lt && lt->name) {
return sldns_str_print(s, slen, "%s", lt->name);
}
return sldns_str_print(s, slen, "RCODE%u", (unsigned)rcode);
}
int sldns_wire2str_class_print(char** s, size_t* slen, uint16_t rrclass)
{
sldns_lookup_table *lt = sldns_lookup_by_id(sldns_rr_classes,
(int)rrclass);
if (lt && lt->name) {
return sldns_str_print(s, slen, "%s", lt->name);
}
return sldns_str_print(s, slen, "CLASS%u", (unsigned)rrclass);
}
int sldns_wire2str_type_print(char** s, size_t* slen, uint16_t rrtype)
{
const sldns_rr_descriptor *descriptor = sldns_rr_descript(rrtype);
if (descriptor && descriptor->_name) {
return sldns_str_print(s, slen, "%s", descriptor->_name);
}
return sldns_str_print(s, slen, "TYPE%u", (unsigned)rrtype);
}
int sldns_wire2str_edns_option_code_print(char** s, size_t* slen,
uint16_t opcode)
{
sldns_lookup_table *lt = sldns_lookup_by_id(sldns_edns_options,
(int)opcode);
if (lt && lt->name) {
return sldns_str_print(s, slen, "%s", lt->name);
}
return sldns_str_print(s, slen, "OPT%u", (unsigned)opcode);
}
int sldns_wire2str_class_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
{
uint16_t c;
if(*dlen == 0) return 0;
if(*dlen < 2) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
c = sldns_read_uint16(*d);
(*d)+=2;
(*dlen)-=2;
return sldns_wire2str_class_print(s, slen, c);
}
int sldns_wire2str_type_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
{
uint16_t t;
if(*dlen == 0) return 0;
if(*dlen < 2) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
t = sldns_read_uint16(*d);
(*d)+=2;
(*dlen)-=2;
return sldns_wire2str_type_print(s, slen, t);
}
int sldns_wire2str_ttl_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
{
uint32_t ttl;
if(*dlen == 0) return 0;
if(*dlen < 4) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
ttl = sldns_read_uint32(*d);
(*d)+=4;
(*dlen)-=4;
return sldns_str_print(s, slen, "%u", (unsigned)ttl);
}
int sldns_wire2str_rdf_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
int rdftype, uint8_t* pkt, size_t pktlen)
{
if(*dlen == 0) return 0;
switch(rdftype) {
case LDNS_RDF_TYPE_NONE:
return 0;
case LDNS_RDF_TYPE_DNAME:
return sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
case LDNS_RDF_TYPE_INT8:
return sldns_wire2str_int8_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_INT16:
return sldns_wire2str_int16_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_INT32:
return sldns_wire2str_int32_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_PERIOD:
return sldns_wire2str_period_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_TSIGTIME:
return sldns_wire2str_tsigtime_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_A:
return sldns_wire2str_a_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_AAAA:
return sldns_wire2str_aaaa_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_STR:
return sldns_wire2str_str_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_APL:
return sldns_wire2str_apl_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_B32_EXT:
return sldns_wire2str_b32_ext_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_B64:
return sldns_wire2str_b64_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_HEX:
return sldns_wire2str_hex_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_NSEC:
return sldns_wire2str_nsec_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_NSEC3_SALT:
return sldns_wire2str_nsec3_salt_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_TYPE:
return sldns_wire2str_type_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_CLASS:
return sldns_wire2str_class_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_CERT_ALG:
return sldns_wire2str_cert_alg_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_ALG:
return sldns_wire2str_alg_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_UNKNOWN:
return sldns_wire2str_unknown_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_TIME:
return sldns_wire2str_time_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_LOC:
return sldns_wire2str_loc_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_WKS:
case LDNS_RDF_TYPE_SERVICE:
return sldns_wire2str_wks_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_NSAP:
return sldns_wire2str_nsap_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_ATMA:
return sldns_wire2str_atma_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_IPSECKEY:
return sldns_wire2str_ipseckey_scan(d, dlen, s, slen, pkt,
pktlen);
case LDNS_RDF_TYPE_HIP:
return sldns_wire2str_hip_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_INT16_DATA:
return sldns_wire2str_int16_data_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
return sldns_wire2str_b32_ext_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_ILNP64:
return sldns_wire2str_ilnp64_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_EUI48:
return sldns_wire2str_eui48_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_EUI64:
return sldns_wire2str_eui64_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_TAG:
return sldns_wire2str_tag_scan(d, dlen, s, slen);
case LDNS_RDF_TYPE_LONG_STR:
return sldns_wire2str_long_str_scan(d, dlen, s, slen);
}
/* unknown rdf type */
return -1;
}
int sldns_wire2str_int8_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 1) return -1;
w = sldns_str_print(s, sl, "%u", (unsigned)**d);
(*d)++;
(*dl)--;
return w;
}
int sldns_wire2str_int16_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 2) return -1;
w = sldns_str_print(s, sl, "%lu", (unsigned long)sldns_read_uint16(*d));
(*d)+=2;
(*dl)-=2;
return w;
}
int sldns_wire2str_int32_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 4) return -1;
w = sldns_str_print(s, sl, "%lu", (unsigned long)sldns_read_uint32(*d));
(*d)+=4;
(*dl)-=4;
return w;
}
int sldns_wire2str_period_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 4) return -1;
w = sldns_str_print(s, sl, "%u", (unsigned)sldns_read_uint32(*d));
(*d)+=4;
(*dl)-=4;
return w;
}
int sldns_wire2str_tsigtime_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
/* tsigtime is 48 bits network order unsigned integer */
int w;
uint64_t tsigtime = 0;
uint64_t d0, d1, d2, d3, d4, d5;
if(*dl < 6) return -1;
d0 = (*d)[0]; /* cast to uint64 for shift operations */
d1 = (*d)[1];
d2 = (*d)[2];
d3 = (*d)[3];
d4 = (*d)[4];
d5 = (*d)[5];
tsigtime = (d0<<40) | (d1<<32) | (d2<<24) | (d3<<16) | (d4<<8) | d5;
#ifndef USE_WINSOCK
w = sldns_str_print(s, sl, "%llu", (long long)tsigtime);
#else
w = sldns_str_print(s, sl, "%I64u", (long long)tsigtime);
#endif
(*d)+=6;
(*dl)-=6;
return w;
}
int sldns_wire2str_a_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
char buf[32];
int w;
if(*dl < 4) return -1;
if(!inet_ntop(AF_INET, *d, buf, (socklen_t)sizeof(buf)))
return -1;
w = sldns_str_print(s, sl, "%s", buf);
(*d)+=4;
(*dl)-=4;
return w;
}
int sldns_wire2str_aaaa_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
#ifdef AF_INET6
char buf[64];
int w;
if(*dl < 16) return -1;
if(!inet_ntop(AF_INET6, *d, buf, (socklen_t)sizeof(buf)))
return -1;
w = sldns_str_print(s, sl, "%s", buf);
(*d)+=16;
(*dl)-=16;
return w;
#else
return -1;
#endif
}
/** printout escaped TYPE_STR character */
static int str_char_print(char** s, size_t* sl, uint8_t c)
{
if(isprint((unsigned char)c) || c == '\t') {
if(c == '\"' || c == '\\')
return sldns_str_print(s, sl, "\\%c", c);
if(*sl) {
**s = (char)c;
(*s)++;
(*sl)--;
}
return 1;
}
return sldns_str_print(s, sl, "\\%03u", (unsigned)c);
}
int sldns_wire2str_str_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w = 0;
size_t i, len;
if(*dl < 1) return -1;
len = **d;
if(*dl < 1+len) return -1;
(*d)++;
(*dl)--;
w += sldns_str_print(s, sl, "\"");
for(i=0; i<len; i++)
w += str_char_print(s, sl, (*d)[i]);
w += sldns_str_print(s, sl, "\"");
(*d)+=len;
(*dl)-=len;
return w;
}
int sldns_wire2str_apl_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int i, w = 0;
uint16_t family;
uint8_t negation, prefix, adflength;
if(*dl < 4) return -1;
family = sldns_read_uint16(*d);
prefix = (*d)[2];
negation = ((*d)[3] & LDNS_APL_NEGATION);
adflength = ((*d)[3] & LDNS_APL_MASK);
if(*dl < 4+(size_t)adflength) return -1;
if(family != LDNS_APL_IP4 && family != LDNS_APL_IP6)
return -1; /* unknown address family */
if(negation)
w += sldns_str_print(s, sl, "!");
w += sldns_str_print(s, sl, "%u:", (unsigned)family);
if(family == LDNS_APL_IP4) {
/* check if prefix <32 ? */
/* address is variable length 0 - 4 */
for(i=0; i<4; i++) {
if(i > 0)
w += sldns_str_print(s, sl, ".");
if(i < (int)adflength)
w += sldns_str_print(s, sl, "%d", (*d)[4+i]);
else w += sldns_str_print(s, sl, "0");
}
} else if(family == LDNS_APL_IP6) {
/* check if prefix <128 ? */
/* address is variable length 0 - 16 */
for(i=0; i<16; i++) {
if(i%2 == 0 && i>0)
w += sldns_str_print(s, sl, ":");
if(i < (int)adflength)
w += sldns_str_print(s, sl, "%02x", (*d)[4+i]);
else w += sldns_str_print(s, sl, "00");
}
}
w += sldns_str_print(s, sl, "/%u", (unsigned)prefix);
(*d) += 4+adflength;
(*dl) -= 4+adflength;
return w;
}
int sldns_wire2str_b32_ext_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
size_t datalen;
size_t sz;
if(*dl < 1) return -1;
datalen = (*d)[0];
if(*dl < 1+datalen) return -1;
sz = sldns_b32_ntop_calculate_size(datalen);
if(*sl < sz+1) {
(*d) += datalen+1;
(*dl) -= (datalen+1);
return (int)sz; /* out of space really, but would need buffer
in order to truncate the output */
}
sldns_b32_ntop_extended_hex((*d)+1, datalen, *s, *sl);
(*d) += datalen+1;
(*dl) -= (datalen+1);
(*s) += sz;
(*sl) -= sz;
return (int)sz;
}
/** scan number of bytes from wire into b64 presentation format */
static int sldns_wire2str_b64_scan_num(uint8_t** d, size_t* dl, char** s,
size_t* sl, size_t num)
{
/* b64_ntop_calculate size includes null at the end */
size_t sz = sldns_b64_ntop_calculate_size(num)-1;
if(*sl < sz+1) {
(*d) += num;
(*dl) -= num;
return (int)sz; /* out of space really, but would need buffer
in order to truncate the output */
}
sldns_b64_ntop(*d, num, *s, *sl);
(*d) += num;
(*dl) -= num;
(*s) += sz;
(*sl) -= sz;
return (int)sz;
}
int sldns_wire2str_b64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
return sldns_wire2str_b64_scan_num(d, dl, s, sl, *dl);
}
int sldns_wire2str_hex_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
return print_remainder_hex("", d, dl, s, sl);
}
int sldns_wire2str_nsec_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
uint8_t* p = *d;
size_t pl = *dl;
unsigned i, bit, window, block_len;
uint16_t t;
int w = 0;
/* check for errors */
while(pl) {
if(pl < 2) return -1;
block_len = (unsigned)p[1];
if(pl < 2+block_len) return -1;
p += block_len+2;
pl -= block_len+2;
}
/* do it */
p = *d;
pl = *dl;
while(pl) {
if(pl < 2) return -1; /* cannot happen */
window = (unsigned)p[0];
block_len = (unsigned)p[1];
if(pl < 2+block_len) return -1; /* cannot happen */
p += 2;
for(i=0; i<block_len; i++) {
if(p[i] == 0) continue;
/* base type number for this octet */
t = ((window)<<8) | (i << 3);
for(bit=0; bit<8; bit++) {
if((p[i]&(0x80>>bit))) {
if(w) w += sldns_str_print(s, sl, " ");
w += sldns_wire2str_type_print(s, sl,
t+bit);
}
}
}
p += block_len;
pl -= block_len+2;
}
(*d) += *dl;
(*dl) = 0;
return w;
}
int sldns_wire2str_nsec3_salt_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
size_t salt_len;
int w;
if(*dl < 1) return -1;
salt_len = (size_t)(*d)[0];
if(*dl < 1+salt_len) return -1;
(*d)++;
(*dl)--;
if(salt_len == 0) {
return sldns_str_print(s, sl, "-");
}
w = print_hex_buf(s, sl, *d, salt_len);
(*dl)-=salt_len;
(*d)+=salt_len;
return w;
}
int sldns_wire2str_cert_alg_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
sldns_lookup_table *lt;
int data, w;
if(*dl < 2) return -1;
data = (int)sldns_read_uint16(*d);
lt = sldns_lookup_by_id(sldns_cert_algorithms, data);
if(lt && lt->name)
w = sldns_str_print(s, sl, "%s", lt->name);
else w = sldns_str_print(s, sl, "%d", data);
(*dl)-=2;
(*d)+=2;
return w;
}
int sldns_wire2str_alg_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
/* don't use algorithm mnemonics in the presentation format
* this kind of got sneaked into the rfc's */
return sldns_wire2str_int8_scan(d, dl, s, sl);
}
int sldns_wire2str_unknown_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
return sldns_wire2str_rdata_unknown_scan(d, dl, s, sl);
}
int sldns_wire2str_time_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
/* create a YYYYMMDDHHMMSS string if possible */
struct tm tm;
char date_buf[16];
uint32_t t;
memset(&tm, 0, sizeof(tm));
if(*dl < 4) return -1;
t = sldns_read_uint32(*d);
date_buf[15]=0;
if(sldns_serial_arithmitics_gmtime_r(t, time(NULL), &tm) &&
strftime(date_buf, 15, "%Y%m%d%H%M%S", &tm)) {
(*d) += 4;
(*dl) -= 4;
return sldns_str_print(s, sl, "%s", date_buf);
}
return -1;
}
static int
loc_cm_print(char** str, size_t* sl, uint8_t mantissa, uint8_t exponent)
{
int w = 0;
uint8_t i;
/* is it 0.<two digits> ? */
if(exponent < 2) {
if(exponent == 1)
mantissa *= 10;
return sldns_str_print(str, sl, "0.%02ld", (long)mantissa);
}
/* always <digit><string of zeros> */
w += sldns_str_print(str, sl, "%d", (int)mantissa);
for(i=0; i<exponent-2; i++)
w += sldns_str_print(str, sl, "0");
return w;
}
int sldns_wire2str_loc_scan(uint8_t** d, size_t* dl, char** str, size_t* sl)
{
/* we could do checking (ie degrees < 90 etc)? */
uint8_t version;
uint8_t size;
uint8_t horizontal_precision;
uint8_t vertical_precision;
uint32_t longitude;
uint32_t latitude;
uint32_t altitude;
char northerness;
char easterness;
uint32_t h;
uint32_t m;
double s;
uint32_t equator = (uint32_t)1 << 31; /* 2**31 */
int w = 0;
if(*dl < 16) return -1;
version = (*d)[0];
if(version != 0)
return sldns_wire2str_hex_scan(d, dl, str, sl);
size = (*d)[1];
horizontal_precision = (*d)[2];
vertical_precision = (*d)[3];
latitude = sldns_read_uint32((*d)+4);
longitude = sldns_read_uint32((*d)+8);
altitude = sldns_read_uint32((*d)+12);
if (latitude > equator) {
northerness = 'N';
latitude = latitude - equator;
} else {
northerness = 'S';
latitude = equator - latitude;
}
h = latitude / (1000 * 60 * 60);
latitude = latitude % (1000 * 60 * 60);
m = latitude / (1000 * 60);
latitude = latitude % (1000 * 60);
s = (double) latitude / 1000.0;
w += sldns_str_print(str, sl, "%02u %02u %06.3f %c ",
h, m, s, northerness);
if (longitude > equator) {
easterness = 'E';
longitude = longitude - equator;
} else {
easterness = 'W';
longitude = equator - longitude;
}
h = longitude / (1000 * 60 * 60);
longitude = longitude % (1000 * 60 * 60);
m = longitude / (1000 * 60);
longitude = longitude % (1000 * 60);
s = (double) longitude / (1000.0);
w += sldns_str_print(str, sl, "%02u %02u %06.3f %c ",
h, m, s, easterness);
s = ((double) altitude) / 100;
s -= 100000;
if(altitude%100 != 0)
w += sldns_str_print(str, sl, "%.2f", s);
else
w += sldns_str_print(str, sl, "%.0f", s);
w += sldns_str_print(str, sl, "m ");
w += loc_cm_print(str, sl, (size & 0xf0) >> 4, size & 0x0f);
w += sldns_str_print(str, sl, "m ");
w += loc_cm_print(str, sl, (horizontal_precision & 0xf0) >> 4,
horizontal_precision & 0x0f);
w += sldns_str_print(str, sl, "m ");
w += loc_cm_print(str, sl, (vertical_precision & 0xf0) >> 4,
vertical_precision & 0x0f);
w += sldns_str_print(str, sl, "m");
(*d)+=16;
(*dl)-=16;
return w;
}
int sldns_wire2str_wks_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
/* protocol, followed by bitmap of services */
const char* proto_name = NULL;
struct protoent *protocol;
struct servent *service;
uint8_t protocol_nr;
int bit, port, w = 0;
size_t i;
/* we cannot print with strings because they
* are not portable, the presentation format may
* not be able to be read in on another computer. */
int print_symbols = 0;
/* protocol */
if(*dl < 1) return -1;
protocol_nr = (*d)[0];
(*d)++;
(*dl)--;
protocol = getprotobynumber((int)protocol_nr);
if(protocol && (protocol->p_name != NULL)) {
w += sldns_str_print(s, sl, "%s", protocol->p_name);
proto_name = protocol->p_name;
} else {
w += sldns_str_print(s, sl, "%u", (unsigned)protocol_nr);
}
for(i=0; i<*dl; i++) {
if((*d)[i] == 0)
continue;
for(bit=0; bit<8; bit++) {
if(!(((*d)[i])&(0x80>>bit)))
continue;
port = (int)i*8 + bit;
if(!print_symbols)
service = NULL;
else
service = getservbyport(
(int)htons((uint16_t)port), proto_name);
if(service && service->s_name)
w += sldns_str_print(s, sl, " %s",
service->s_name);
else w += sldns_str_print(s, sl, " %u",
(unsigned)port);
}
}
#ifdef HAVE_ENDSERVENT
endservent();
#endif
#ifdef HAVE_ENDPROTOENT
endprotoent();
#endif
(*d) += *dl;
(*dl) = 0;
return w;
}
int sldns_wire2str_nsap_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
return print_remainder_hex("0x", d, dl, s, sl);
}
int sldns_wire2str_atma_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
return print_remainder_hex("", d, dl, s, sl);
}
/* internal scan routine that can modify arguments on failure */
static int sldns_wire2str_ipseckey_scan_internal(uint8_t** d, size_t* dl,
char** s, size_t* sl, uint8_t* pkt, size_t pktlen)
{
/* http://www.ietf.org/internet-drafts/draft-ietf-ipseckey-rr-12.txt*/
uint8_t precedence, gateway_type, algorithm;
int w = 0;
if(*dl < 3) return -1;
precedence = (*d)[0];
gateway_type = (*d)[1];
algorithm = (*d)[2];
if(gateway_type > 3)
return -1; /* unknown */
(*d)+=3;
(*dl)-=3;
w += sldns_str_print(s, sl, "%d %d %d ",
(int)precedence, (int)gateway_type, (int)algorithm);
switch(gateway_type) {
case 0: /* no gateway */
w += sldns_str_print(s, sl, ".");
break;
case 1: /* ip4 */
w += sldns_wire2str_a_scan(d, dl, s, sl);
break;
case 2: /* ip6 */
w += sldns_wire2str_aaaa_scan(d, dl, s, sl);
break;
case 3: /* dname */
w += sldns_wire2str_dname_scan(d, dl, s, sl, pkt, pktlen);
break;
default: /* unknown */
return -1;
}
if(*dl < 1)
return -1;
w += sldns_str_print(s, sl, " ");
w += sldns_wire2str_b64_scan_num(d, dl, s, sl, *dl);
return w;
}
int sldns_wire2str_ipseckey_scan(uint8_t** d, size_t* dl, char** s, size_t* sl,
uint8_t* pkt, size_t pktlen)
{
uint8_t* od = *d;
char* os = *s;
size_t odl = *dl, osl = *sl;
int w=sldns_wire2str_ipseckey_scan_internal(d, dl, s, sl, pkt, pktlen);
if(w == -1) {
*d = od;
*s = os;
*dl = odl;
*sl = osl;
return -1;
}
return w;
}
int sldns_wire2str_hip_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
uint8_t algo, hitlen;
uint16_t pklen;
/* read lengths */
if(*dl < 4)
return -1;
hitlen = (*d)[0];
algo = (*d)[1];
pklen = sldns_read_uint16((*d)+2);
if(*dl < (size_t)4 + (size_t)hitlen + (size_t)pklen)
return -1;
/* write: algo hit pubkey */
w = sldns_str_print(s, sl, "%u ", (unsigned)algo);
w += print_hex_buf(s, sl, (*d)+4, hitlen);
w += sldns_str_print(s, sl, " ");
(*d)+=4+hitlen;
(*dl)-= (4+hitlen);
w += sldns_wire2str_b64_scan_num(d, dl, s, sl, pklen);
return w;
}
int sldns_wire2str_int16_data_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
uint16_t n;
if(*dl < 2)
return -1;
n = sldns_read_uint16(*d);
if(*dl < 2+(size_t)n)
return -1;
(*d)+=2;
(*dl)-=2;
return sldns_wire2str_b64_scan_num(d, dl, s, sl, n);
}
int sldns_wire2str_nsec3_next_owner_scan(uint8_t** d, size_t* dl, char** s,
size_t* sl)
{
return sldns_wire2str_b32_ext_scan(d, dl, s, sl);
}
int sldns_wire2str_ilnp64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 8)
return -1;
w = sldns_str_print(s, sl, "%.4x:%.4x:%.4x:%.4x",
sldns_read_uint16(*d), sldns_read_uint16((*d)+2),
sldns_read_uint16((*d)+4), sldns_read_uint16((*d)+6));
(*d)+=8;
(*dl)-=8;
return w;
}
int sldns_wire2str_eui48_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 6)
return -1;
w = sldns_str_print(s, sl, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x",
(*d)[0], (*d)[1], (*d)[2], (*d)[3], (*d)[4], (*d)[5]);
(*d)+=6;
(*dl)-=6;
return w;
}
int sldns_wire2str_eui64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
int w;
if(*dl < 8)
return -1;
w = sldns_str_print(s, sl, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x-%.2x-%.2x",
(*d)[0], (*d)[1], (*d)[2], (*d)[3], (*d)[4], (*d)[5],
(*d)[6], (*d)[7]);
(*d)+=8;
(*dl)-=8;
return w;
}
int sldns_wire2str_tag_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
size_t i, n;
int w = 0;
if(*dl < 1)
return -1;
n = (size_t)((*d)[0]);
if(*dl < 1+n)
return -1;
for(i=0; i<n; i++)
if(!isalnum((unsigned char)(*d)[i]))
return -1;
for(i=0; i<n; i++)
w += sldns_str_print(s, sl, "%c", (char)(*d)[i]);
(*d)+=n+1;
(*dl)-=(n+1);
return w;
}
int sldns_wire2str_long_str_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
{
size_t i;
int w = 0;
w += sldns_str_print(s, sl, "\"");
for(i=0; i<*dl; i++)
w += str_char_print(s, sl, (*d)[i]);
w += sldns_str_print(s, sl, "\"");
(*d)+=*dl;
(*dl)=0;
return w;
}
int sldns_wire2str_edns_llq_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
/* LLQ constants */
const char* llq_errors[] = {"NO-ERROR", "SERV-FULL", "STATIC",
"FORMAT-ERR", "NO-SUCH-LLQ", "BAD-VERS", "UNKNOWN_ERR"};
const unsigned int llq_errors_num = 7;
const char* llq_opcodes[] = {"LLQ-SETUP", "LLQ-REFRESH", "LLQ-EVENT"};
const unsigned int llq_opcodes_num = 3;
uint16_t version, llq_opcode, error_code;
uint64_t llq_id;
uint32_t lease_life; /* Requested or granted life of LLQ, in seconds */
int w = 0;
/* read the record */
if(len != 18) {
w += sldns_str_print(s, sl, "malformed LLQ ");
w += print_hex_buf(s, sl, data, len);
return w;
}
version = sldns_read_uint16(data);
llq_opcode = sldns_read_uint16(data+2);
error_code = sldns_read_uint16(data+4);
memmove(&llq_id, data+6, sizeof(llq_id));
lease_life = sldns_read_uint32(data+14);
/* print it */
w += sldns_str_print(s, sl, "v%d ", (int)version);
if(llq_opcode < llq_opcodes_num)
w += sldns_str_print(s, sl, "%s", llq_opcodes[llq_opcode]);
else w += sldns_str_print(s, sl, "opcode %d", (int)llq_opcode);
if(error_code < llq_errors_num)
w += sldns_str_print(s, sl, " %s", llq_errors[error_code]);
else w += sldns_str_print(s, sl, " error %d", (int)error_code);
#ifndef USE_WINSOCK
w += sldns_str_print(s, sl, " id %llx lease-life %lu",
(unsigned long long)llq_id, (unsigned long)lease_life);
#else
w += sldns_str_print(s, sl, " id %I64x lease-life %lu",
(unsigned long long)llq_id, (unsigned long)lease_life);
#endif
return w;
}
int sldns_wire2str_edns_ul_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
uint32_t lease;
int w = 0;
if(len != 4) {
w += sldns_str_print(s, sl, "malformed UL ");
w += print_hex_buf(s, sl, data, len);
return w;
}
lease = sldns_read_uint32(data);
w += sldns_str_print(s, sl, "lease %lu", (unsigned long)lease);
return w;
}
int sldns_wire2str_edns_nsid_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
int w = 0;
size_t i, printed=0;
w += print_hex_buf(s, sl, data, len);
for(i=0; i<len; i++) {
if(isprint((unsigned char)data[i]) || data[i] == '\t') {
if(!printed) {
w += sldns_str_print(s, sl, " (");
printed = 1;
}
w += sldns_str_print(s, sl, "%c", (char)data[i]);
}
}
if(printed)
w += sldns_str_print(s, sl, ")");
return w;
}
int sldns_wire2str_edns_dau_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
sldns_lookup_table *lt;
size_t i;
int w = 0;
for(i=0; i<len; i++) {
lt = sldns_lookup_by_id(sldns_algorithms, (int)data[i]);
if(lt && lt->name)
w += sldns_str_print(s, sl, " %s", lt->name);
else w += sldns_str_print(s, sl, " %d", (int)data[i]);
}
return w;
}
int sldns_wire2str_edns_dhu_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
sldns_lookup_table *lt;
size_t i;
int w = 0;
for(i=0; i<len; i++) {
lt = sldns_lookup_by_id(sldns_hashes, (int)data[i]);
if(lt && lt->name)
w += sldns_str_print(s, sl, " %s", lt->name);
else w += sldns_str_print(s, sl, " %d", (int)data[i]);
}
return w;
}
int sldns_wire2str_edns_n3u_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
size_t i;
int w = 0;
for(i=0; i<len; i++) {
if(data[i] == 1)
w += sldns_str_print(s, sl, " SHA1");
else w += sldns_str_print(s, sl, " %d", (int)data[i]);
}
return w;
}
int sldns_wire2str_edns_subnet_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
int w = 0;
uint16_t family;
uint8_t source, scope;
if(len < 4) {
w += sldns_str_print(s, sl, "malformed subnet ");
w += print_hex_buf(s, sl, data, len);
return w;
}
family = sldns_read_uint16(data);
source = data[2];
scope = data[3];
if(family == 1) {
/* IP4 */
char buf[64];
uint8_t ip4[4];
memset(ip4, 0, sizeof(ip4));
if(len-4 > 4) {
w += sldns_str_print(s, sl, "trailingdata:");
w += print_hex_buf(s, sl, data+4+4, len-4-4);
w += sldns_str_print(s, sl, " ");
len = 4+4;
}
memmove(ip4, data+4, len-4);
if(!inet_ntop(AF_INET, ip4, buf, (socklen_t)sizeof(buf))) {
w += sldns_str_print(s, sl, "ip4ntoperror ");
w += print_hex_buf(s, sl, data+4+4, len-4-4);
} else {
w += sldns_str_print(s, sl, "%s", buf);
}
} else if(family == 2) {
/* IP6 */
char buf[64];
uint8_t ip6[16];
memset(ip6, 0, sizeof(ip6));
if(len-4 > 16) {
w += sldns_str_print(s, sl, "trailingdata:");
w += print_hex_buf(s, sl, data+4+16, len-4-16);
w += sldns_str_print(s, sl, " ");
len = 4+16;
}
memmove(ip6, data+4, len-4);
#ifdef AF_INET6
if(!inet_ntop(AF_INET6, ip6, buf, (socklen_t)sizeof(buf))) {
w += sldns_str_print(s, sl, "ip6ntoperror ");
w += print_hex_buf(s, sl, data+4+4, len-4-4);
} else {
w += sldns_str_print(s, sl, "%s", buf);
}
#else
w += print_hex_buf(s, sl, data+4+4, len-4-4);
#endif
} else {
/* unknown */
w += sldns_str_print(s, sl, "family %d ",
(int)family);
w += print_hex_buf(s, sl, data, len);
}
w += sldns_str_print(s, sl, "/%d scope /%d", (int)source, (int)scope);
return w;
}
int sldns_wire2str_edns_keepalive_print(char** s, size_t* sl, uint8_t* data,
size_t len)
{
int w = 0;
uint16_t timeout;
if(!(len == 0 || len == 2)) {
w += sldns_str_print(s, sl, "malformed keepalive ");
w += print_hex_buf(s, sl, data, len);
return w;
}
if(len == 0 ) {
w += sldns_str_print(s, sl, "no timeout value (only valid for client option) ");
} else {
timeout = sldns_read_uint16(data);
w += sldns_str_print(s, sl, "timeout value in units of 100ms %u", (int)timeout);
}
return w;
}
int sldns_wire2str_edns_option_print(char** s, size_t* sl,
uint16_t option_code, uint8_t* optdata, size_t optlen)
{
int w = 0;
w += sldns_wire2str_edns_option_code_print(s, sl, option_code);
w += sldns_str_print(s, sl, ": ");
switch(option_code) {
case LDNS_EDNS_LLQ:
w += sldns_wire2str_edns_llq_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_UL:
w += sldns_wire2str_edns_ul_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_NSID:
w += sldns_wire2str_edns_nsid_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_DAU:
w += sldns_wire2str_edns_dau_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_DHU:
w += sldns_wire2str_edns_dhu_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_N3U:
w += sldns_wire2str_edns_n3u_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_CLIENT_SUBNET:
w += sldns_wire2str_edns_subnet_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_KEEPALIVE:
w += sldns_wire2str_edns_keepalive_print(s, sl, optdata, optlen);
break;
case LDNS_EDNS_PADDING:
w += print_hex_buf(s, sl, optdata, optlen);
break;
default:
/* unknown option code */
w += print_hex_buf(s, sl, optdata, optlen);
break;
}
return w;
}
/** print the edns options to string */
static int
print_edns_opts(char** s, size_t* sl, uint8_t* rdata, size_t rdatalen)
{
uint16_t option_code, option_len;
int w = 0;
while(rdatalen > 0) {
/* option name */
if(rdatalen < 4) {
w += sldns_str_print(s, sl, " ; malformed: ");
w += print_hex_buf(s, sl, rdata, rdatalen);
return w;
}
option_code = sldns_read_uint16(rdata);
option_len = sldns_read_uint16(rdata+2);
rdata += 4;
rdatalen -= 4;
/* option value */
if(rdatalen < (size_t)option_len) {
w += sldns_str_print(s, sl, " ; malformed ");
w += sldns_wire2str_edns_option_code_print(s, sl,
option_code);
w += sldns_str_print(s, sl, ": ");
w += print_hex_buf(s, sl, rdata, rdatalen);
return w;
}
w += sldns_str_print(s, sl, " ; ");
w += sldns_wire2str_edns_option_print(s, sl, option_code,
rdata, option_len);
rdata += option_len;
rdatalen -= option_len;
}
return w;
}
int sldns_wire2str_edns_scan(uint8_t** data, size_t* data_len, char** str,
size_t* str_len, uint8_t* pkt, size_t pktlen)
{
int w = 0;
uint8_t ext_rcode, edns_version;
uint16_t udpsize, edns_bits, rdatalen;
w += sldns_str_print(str, str_len, "; EDNS:");
/* some input checks, domain name */
if(*data_len < 1+10)
return w + print_remainder_hex("Error malformed 0x",
data, data_len, str, str_len);
if(*data[0] != 0) {
return w + print_remainder_hex("Error nonrootdname 0x",
data, data_len, str, str_len);
}
(*data)++;
(*data_len)--;
/* check type and read fixed contents */
if(sldns_read_uint16((*data)) != LDNS_RR_TYPE_OPT) {
return w + print_remainder_hex("Error nottypeOPT 0x",
data, data_len, str, str_len);
}
udpsize = sldns_read_uint16((*data)+2);
ext_rcode = (*data)[4];
edns_version = (*data)[5];
edns_bits = sldns_read_uint16((*data)+6);
rdatalen = sldns_read_uint16((*data)+8);
(*data)+=10;
(*data_len)-=10;
w += sldns_str_print(str, str_len, " version: %u;",
(unsigned)edns_version);
w += sldns_str_print(str, str_len, " flags:");
if((edns_bits & LDNS_EDNS_MASK_DO_BIT))
w += sldns_str_print(str, str_len, " do");
/* the extended rcode is the value set, shifted four bits,
* and or'd with the original rcode */
if(ext_rcode) {
int rc = ((int)ext_rcode)<<4;
if(pkt && pktlen >= LDNS_HEADER_SIZE)
rc |= LDNS_RCODE_WIRE(pkt);
w += sldns_str_print(str, str_len, " ; ext-rcode: %d", rc);
}
w += sldns_str_print(str, str_len, " ; udp: %u", (unsigned)udpsize);
if(rdatalen) {
if((size_t)*data_len < rdatalen) {
w += sldns_str_print(str, str_len,
" ; Error EDNS rdata too short; ");
rdatalen = (uint16_t)*data_len;
}
w += print_edns_opts(str, str_len, *data, rdatalen);
(*data) += rdatalen;
(*data_len) -= rdatalen;
}
w += sldns_str_print(str, str_len, "\n");
return w;
}
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