contrib/unbound/ldns/wire2str.c

   1 /*
   2  * wire2str.c
   3  *
   4  * conversion routines from the wire format
   5  * to the presentation format (strings)
   6  *
   7  * (c) NLnet Labs, 2004-2006
   8  *
   9  * See the file LICENSE for the license
  10  */
  11 /**
  12  * \file
  13  *
  14  * Contains functions to translate the wireformat to text
  15  * representation, as well as functions to print them.
  16  */
  17 #include "config.h"
  18 #include "ldns/wire2str.h"
  19 #include "ldns/str2wire.h"
  20 #include "ldns/rrdef.h"
  21 #include "ldns/pkthdr.h"
  22 #include "ldns/parseutil.h"
  23 #include "ldns/sbuffer.h"
  24 #include "ldns/keyraw.h"
  25 #ifdef HAVE_TIME_H
  26 #include <time.h>
  27 #endif
  28 #include <sys/time.h>
  29 #include <stdarg.h>
  30 #include <ctype.h>
  31 #ifdef HAVE_NETDB_H
  32 #include <netdb.h>
  33 #endif
  34
  35 /* lookup tables for standard DNS stuff  */
  36 /* Taken from RFC 2535, section 7.  */
  37 static sldns_lookup_table sldns_algorithms_data[] = {
  38         { LDNS_RSAMD5, "RSAMD5" },
  39         { LDNS_DH, "DH" },
  40         { LDNS_DSA, "DSA" },
  41         { LDNS_ECC, "ECC" },
  42         { LDNS_RSASHA1, "RSASHA1" },
  43         { LDNS_DSA_NSEC3, "DSA-NSEC3-SHA1" },
  44         { LDNS_RSASHA1_NSEC3, "RSASHA1-NSEC3-SHA1" },
  45         { LDNS_RSASHA256, "RSASHA256"},
  46         { LDNS_RSASHA512, "RSASHA512"},
  47         { LDNS_ECC_GOST, "ECC-GOST"},
  48         { LDNS_ECDSAP256SHA256, "ECDSAP256SHA256"},
  49         { LDNS_ECDSAP384SHA384, "ECDSAP384SHA384"},
  50         { LDNS_INDIRECT, "INDIRECT" },
  51         { LDNS_PRIVATEDNS, "PRIVATEDNS" },
  52         { LDNS_PRIVATEOID, "PRIVATEOID" },
  53         { 0, NULL }
  54 };
  55 sldns_lookup_table* sldns_algorithms = sldns_algorithms_data;
  56
  57 /* hash algorithms in DS record */
  58 static sldns_lookup_table sldns_hashes_data[] = {
  59         { LDNS_SHA1, "SHA1" },
  60         { LDNS_SHA256, "SHA256" },
  61         { LDNS_HASH_GOST, "HASH-GOST" },
  62         { LDNS_SHA384, "SHA384" },
  63         { 0, NULL }
  64 };
  65 sldns_lookup_table* sldns_hashes = sldns_hashes_data;
  66
  67 /* Taken from RFC 4398  */
  68 static sldns_lookup_table sldns_cert_algorithms_data[] = {
  69         { LDNS_CERT_PKIX, "PKIX" },
  70         { LDNS_CERT_SPKI, "SPKI" },
  71         { LDNS_CERT_PGP, "PGP" },
  72         { LDNS_CERT_IPKIX, "IPKIX" },
  73         { LDNS_CERT_ISPKI, "ISPKI" },
  74         { LDNS_CERT_IPGP, "IPGP" },
  75         { LDNS_CERT_ACPKIX, "ACPKIX" },
  76         { LDNS_CERT_IACPKIX, "IACPKIX" },
  77         { LDNS_CERT_URI, "URI" },
  78         { LDNS_CERT_OID, "OID" },
  79         { 0, NULL }
  80 };
  81 sldns_lookup_table* sldns_cert_algorithms = sldns_cert_algorithms_data;
  82
  83 /* if these are used elsewhere */
  84 static sldns_lookup_table sldns_rcodes_data[] = {
  85         { LDNS_RCODE_NOERROR, "NOERROR" },
  86         { LDNS_RCODE_FORMERR, "FORMERR" },
  87         { LDNS_RCODE_SERVFAIL, "SERVFAIL" },
  88         { LDNS_RCODE_NXDOMAIN, "NXDOMAIN" },
  89         { LDNS_RCODE_NOTIMPL, "NOTIMPL" },
  90         { LDNS_RCODE_REFUSED, "REFUSED" },
  91         { LDNS_RCODE_YXDOMAIN, "YXDOMAIN" },
  92         { LDNS_RCODE_YXRRSET, "YXRRSET" },
  93         { LDNS_RCODE_NXRRSET, "NXRRSET" },
  94         { LDNS_RCODE_NOTAUTH, "NOTAUTH" },
  95         { LDNS_RCODE_NOTZONE, "NOTZONE" },
  96         { 0, NULL }
  97 };
  98 sldns_lookup_table* sldns_rcodes = sldns_rcodes_data;
  99
 100 static sldns_lookup_table sldns_opcodes_data[] = {
 101         { LDNS_PACKET_QUERY, "QUERY" },
 102         { LDNS_PACKET_IQUERY, "IQUERY" },
 103         { LDNS_PACKET_STATUS, "STATUS" },
 104         { LDNS_PACKET_NOTIFY, "NOTIFY" },
 105         { LDNS_PACKET_UPDATE, "UPDATE" },
 106         { 0, NULL }
 107 };
 108 sldns_lookup_table* sldns_opcodes = sldns_opcodes_data;
 109
 110 static sldns_lookup_table sldns_wireparse_errors_data[] = {
 111         { LDNS_WIREPARSE_ERR_OK, "no parse error" },
 112         { LDNS_WIREPARSE_ERR_GENERAL, "parse error" },
 113         { LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, "Domainname length overflow" },
 114         { LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW, "Domainname length underflow (zero length)" },
 115         { LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, "buffer too small" },
 116         { LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, "Label length overflow" },
 117         { LDNS_WIREPARSE_ERR_EMPTY_LABEL, "Empty label" },
 118         { LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE, "Syntax error, bad escape sequence" },
 119         { LDNS_WIREPARSE_ERR_SYNTAX, "Syntax error, could not parse the RR" },
 120         { LDNS_WIREPARSE_ERR_SYNTAX_TTL, "Syntax error, could not parse the RR's TTL" },
 121         { LDNS_WIREPARSE_ERR_SYNTAX_TYPE, "Syntax error, could not parse the RR's type" },
 122         { LDNS_WIREPARSE_ERR_SYNTAX_CLASS, "Syntax error, could not parse the RR's class" },
 123         { LDNS_WIREPARSE_ERR_SYNTAX_RDATA, "Syntax error, could not parse the RR's rdata" },
 124         { LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE, "Syntax error, value expected" },
 125         { LDNS_WIREPARSE_ERR_INVALID_STR, "Conversion error, string expected" },
 126         { LDNS_WIREPARSE_ERR_SYNTAX_B64, "Conversion error, b64 encoding expected" },
 127         { LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT, "Conversion error, b32 ext encoding expected" },
 128         { LDNS_WIREPARSE_ERR_SYNTAX_HEX, "Conversion error, hex encoding expected" },
 129         { LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM, "Bad algorithm type for CERT record" },
 130         { LDNS_WIREPARSE_ERR_SYNTAX_TIME, "Conversion error, time encoding expected" },
 131         { LDNS_WIREPARSE_ERR_SYNTAX_PERIOD, "Conversion error, time period encoding expected" },
 132         { LDNS_WIREPARSE_ERR_SYNTAX_ILNP64, "Conversion error, 4 colon separated hex numbers expected" },
 133         { LDNS_WIREPARSE_ERR_SYNTAX_EUI48,
 134                 "Conversion error, 6 two character hex numbers "
 135                 "separated by dashes expected (i.e. xx-xx-xx-xx-xx-xx" },
 136         { LDNS_WIREPARSE_ERR_SYNTAX_EUI64,
 137                 "Conversion error, 8 two character hex numbers "
 138                 "separated by dashes expected (i.e. xx-xx-xx-xx-xx-xx-xx-xx" },
 139         { LDNS_WIREPARSE_ERR_SYNTAX_TAG,
 140                 "Conversion error, a non-zero sequence of US-ASCII letters "
 141                 "and numbers in lower case expected" },
 142         { LDNS_WIREPARSE_ERR_NOT_IMPL, "not implemented" },
 143         { LDNS_WIREPARSE_ERR_SYNTAX_INT, "Conversion error, integer expected" },
 144         { LDNS_WIREPARSE_ERR_SYNTAX_IP4, "Conversion error, ip4 addr expected" },
 145         { LDNS_WIREPARSE_ERR_SYNTAX_IP6, "Conversion error, ip6 addr expected" },
 146         { LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW, "Syntax error, integer overflow" },
 147         { LDNS_WIREPARSE_ERR_INCLUDE, "$INCLUDE directive was seen in the zone" },
 148         { LDNS_WIREPARSE_ERR_PARENTHESIS, "Parse error, parenthesis mismatch" },
 149         { 0, NULL }
 150 };
 151 sldns_lookup_table* sldns_wireparse_errors = sldns_wireparse_errors_data;
 152
 153 static sldns_lookup_table sldns_edns_flags_data[] = {
 154         { 3600, "do"},
 155         { 0, NULL}
 156 };
 157 sldns_lookup_table* sldns_edns_flags = sldns_edns_flags_data;
 158
 159 static sldns_lookup_table sldns_edns_options_data[] = {
 160         { 1, "LLQ" },
 161         { 2, "UL" },
 162         { 3, "NSID" },
 163         /* 4 draft-cheshire-edns0-owner-option */
 164         { 5, "DAU" },
 165         { 6, "DHU" },
 166         { 7, "N3U" },
 167         { 8, "edns-client-subnet" },
 168         { 0, NULL}
 169 };
 170 sldns_lookup_table* sldns_edns_options = sldns_edns_options_data;
 171
 172 char* sldns_wire2str_pkt(uint8_t* data, size_t len)
 173 {
 174         size_t slen = (size_t)sldns_wire2str_pkt_buf(data, len, NULL, 0);
 175         char* result = (char*)malloc(slen+1);
 176         if(!result) return NULL;
 177         sldns_wire2str_pkt_buf(data, len, result, slen+1);
 178         return result;
 179 }
 180
 181 char* sldns_wire2str_rr(uint8_t* rr, size_t len)
 182 {
 183         size_t slen = (size_t)sldns_wire2str_rr_buf(rr, len, NULL, 0);
 184         char* result = (char*)malloc(slen+1);
 185         if(!result) return NULL;
 186         sldns_wire2str_rr_buf(rr, len, result, slen+1);
 187         return result;
 188 }
 189
 190 char* sldns_wire2str_type(uint16_t rrtype)
 191 {
 192         char buf[16];
 193         sldns_wire2str_type_buf(rrtype, buf, sizeof(buf));
 194         return strdup(buf);
 195 }
 196
 197 char* sldns_wire2str_class(uint16_t rrclass)
 198 {
 199         char buf[16];
 200         sldns_wire2str_class_buf(rrclass, buf, sizeof(buf));
 201         return strdup(buf);
 202 }
 203
 204 char* sldns_wire2str_dname(uint8_t* dname, size_t dname_len)
 205 {
 206         size_t slen=(size_t)sldns_wire2str_dname_buf(dname, dname_len, NULL, 0);
 207         char* result = (char*)malloc(slen+1);
 208         if(!result) return NULL;
 209         sldns_wire2str_dname_buf(dname, dname_len, result, slen+1);
 210         return result;
 211 }
 212
 213 char* sldns_wire2str_rcode(int rcode)
 214 {
 215         char buf[16];
 216         sldns_wire2str_rcode_buf(rcode, buf, sizeof(buf));
 217         return strdup(buf);
 218 }
 219
 220 int sldns_wire2str_pkt_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
 221 {
 222         /* use arguments as temporary variables */
 223         return sldns_wire2str_pkt_scan(&d, &dlen, &s, &slen);
 224 }
 225
 226 int sldns_wire2str_rr_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
 227 {
 228         /* use arguments as temporary variables */
 229         return sldns_wire2str_rr_scan(&d, &dlen, &s, &slen, NULL, 0);
 230 }
 231
 232 int sldns_wire2str_rdata_buf(uint8_t* rdata, size_t rdata_len, char* str,
 233         size_t str_len, uint16_t rrtype)
 234 {
 235         /* use arguments as temporary variables */
 236         return sldns_wire2str_rdata_scan(&rdata, &rdata_len, &str, &str_len,
 237                 rrtype, NULL, 0);
 238 }
 239
 240 int sldns_wire2str_rr_unknown_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
 241 {
 242         /* use arguments as temporary variables */
 243         return sldns_wire2str_rr_unknown_scan(&d, &dlen, &s, &slen, NULL, 0);
 244 }
 245
 246 int sldns_wire2str_rr_comment_buf(uint8_t* rr, size_t rrlen, size_t dname_len,
 247         char* s, size_t slen)
 248 {
 249         uint16_t rrtype = sldns_wirerr_get_type(rr, rrlen, dname_len);
 250         return sldns_wire2str_rr_comment_print(&s, &slen, rr, rrlen, dname_len,
 251                 rrtype);
 252 }
 253
 254 int sldns_wire2str_type_buf(uint16_t rrtype, char* s, size_t slen)
 255 {
 256         /* use arguments as temporary variables */
 257         return sldns_wire2str_type_print(&s, &slen, rrtype);
 258 }
 259
 260 int sldns_wire2str_class_buf(uint16_t rrclass, char* s, size_t slen)
 261 {
 262         /* use arguments as temporary variables */
 263         return sldns_wire2str_class_print(&s, &slen, rrclass);
 264 }
 265
 266 int sldns_wire2str_rcode_buf(int rcode, char* s, size_t slen)
 267 {
 268         /* use arguments as temporary variables */
 269         return sldns_wire2str_rcode_print(&s, &slen, rcode);
 270 }
 271
 272 int sldns_wire2str_dname_buf(uint8_t* d, size_t dlen, char* s, size_t slen)
 273 {
 274         /* use arguments as temporary variables */
 275         return sldns_wire2str_dname_scan(&d, &dlen, &s, &slen, NULL, 0);
 276 }
 277
 278 int sldns_str_vprint(char** str, size_t* slen, const char* format, va_list args)
 279 {
 280         int w = vsnprintf(*str, *slen, format, args);
 281         if(w < 0) {
 282                 /* error in printout */
 283                 return 0;
 284         } else if((size_t)w >= *slen) {
 285                 *str = NULL; /* we do not want str to point outside of buffer*/
 286                 *slen = 0;
 287         } else {
 288                 *str += w;
 289                 *slen -= w;
 290         }
 291         return w;
 292 }
 293
 294 int sldns_str_print(char** str, size_t* slen, const char* format, ...)
 295 {
 296         int w;
 297         va_list args;
 298         va_start(args, format);
 299         w = sldns_str_vprint(str, slen, format, args);
 300         va_end(args);
 301         return w;
 302 }
 303
 304 /** print hex format into text buffer for specified length */
 305 static int print_hex_buf(char** s, size_t* slen, uint8_t* buf, size_t len)
 306 {
 307         const char* hex = "0123456789ABCDEF";
 308         size_t i;
 309         for(i=0; i<len; i++) {
 310                 (void)sldns_str_print(s, slen, "%c%c", hex[(buf[i]&0xf0)>>4],
 311                         hex[buf[i]&0x0f]);
 312         }
 313         return (int)len*2;
 314 }
 315
 316 /** print remainder of buffer in hex format with prefixed text */
 317 static int print_remainder_hex(const char* pref, uint8_t** d, size_t* dlen,
 318         char** s, size_t* slen)
 319 {
 320         int w = 0;
 321         w += sldns_str_print(s, slen, "%s", pref);
 322         w += print_hex_buf(s, slen, *d, *dlen);
 323         *d += *dlen;
 324         *dlen = 0;
 325         return w;
 326 }
 327
 328 int sldns_wire2str_pkt_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
 329 {
 330         int w = 0;
 331         unsigned qdcount, ancount, nscount, arcount, i;
 332         uint8_t* pkt = *d;
 333         size_t pktlen = *dlen;
 334         if(*dlen >= LDNS_HEADER_SIZE) {
 335                 qdcount = (unsigned)LDNS_QDCOUNT(*d);
 336                 ancount = (unsigned)LDNS_ANCOUNT(*d);
 337                 nscount = (unsigned)LDNS_NSCOUNT(*d);
 338                 arcount = (unsigned)LDNS_ARCOUNT(*d);
 339         } else {
 340                 qdcount = ancount = nscount = arcount = 0;
 341         }
 342         w += sldns_wire2str_header_scan(d, dlen, s, slen);
 343         w += sldns_str_print(s, slen, "\n");
 344         w += sldns_str_print(s, slen, ";; QUESTION SECTION:\n");
 345         for(i=0; i<qdcount; i++) {
 346                 w += sldns_wire2str_rrquestion_scan(d, dlen, s, slen,
 347                         pkt, pktlen);
 348                 if(!*dlen) break;
 349         }
 350         w += sldns_str_print(s, slen, "\n");
 351         w += sldns_str_print(s, slen, ";; ANSWER SECTION:\n");
 352         for(i=0; i<ancount; i++) {
 353                 w += sldns_wire2str_rr_scan(d, dlen, s, slen, pkt, pktlen);
 354                 if(!*dlen) break;
 355         }
 356         w += sldns_str_print(s, slen, "\n");
 357         w += sldns_str_print(s, slen, ";; AUTHORITY SECTION:\n");
 358         for(i=0; i<nscount; i++) {
 359                 w += sldns_wire2str_rr_scan(d, dlen, s, slen, pkt, pktlen);
 360                 if(!*dlen) break;
 361         }
 362         w += sldns_str_print(s, slen, "\n");
 363         w += sldns_str_print(s, slen, ";; ADDITIONAL SECTION:\n");
 364         for(i=0; i<arcount; i++) {
 365                 w += sldns_wire2str_rr_scan(d, dlen, s, slen, pkt, pktlen);
 366                 if(!*dlen) break;
 367         }
 368         /* other fields: WHEN(time), SERVER(IP) not available here. */
 369         w += sldns_str_print(s, slen, ";; MSG SIZE  rcvd: %d\n", (int)pktlen);
 370         if(*dlen > 0) {
 371                 w += print_remainder_hex(";; trailing garbage 0x",
 372                         d, dlen, s, slen);
 373                 w += sldns_str_print(s, slen, "\n");
 374         }
 375         return w;
 376 }
 377
 378 /** scan type, class and ttl and printout, for rr */
 379 static int sldns_rr_tcttl_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 380 {
 381         int w = 0;
 382         uint16_t t, c;
 383         uint32_t ttl;
 384         if(*dl < 8) {
 385                 if(*dl < 4)
 386                         return w + print_remainder_hex("; Error malformed 0x",
 387                                 d, dl, s, sl);
 388                 /* these print values or 0x.. if none left */
 389                 t = sldns_read_uint16(*d);
 390                 c = sldns_read_uint16((*d)+2);
 391                 (*d)+=4;
 392                 (*dl)-=4;
 393                 w += sldns_wire2str_class_print(s, sl, c);
 394                 w += sldns_str_print(s, sl, "\t");
 395                 w += sldns_wire2str_type_print(s, sl, t);
 396                 if(*dl == 0)
 397                         return w + sldns_str_print(s, sl, "; Error no ttl");
 398                 return w + print_remainder_hex(
 399                         "; Error malformed ttl 0x", d, dl, s, sl);
 400         }
 401         t = sldns_read_uint16(*d);
 402         c = sldns_read_uint16((*d)+2);
 403         ttl = sldns_read_uint32((*d)+4);
 404         (*d)+=8;
 405         (*dl)-=8;
 406         w += sldns_str_print(s, sl, "%lu\t", (unsigned long)ttl);
 407         w += sldns_wire2str_class_print(s, sl, c);
 408         w += sldns_str_print(s, sl, "\t");
 409         w += sldns_wire2str_type_print(s, sl, t);
 410         return w;
 411 }
 412
 413 int sldns_wire2str_rr_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
 414         uint8_t* pkt, size_t pktlen)
 415 {
 416         int w = 0;
 417         uint8_t* rr = *d;
 418         size_t rrlen = *dlen, dname_off, rdlen, ordlen;
 419         uint16_t rrtype = 0;
 420
 421         if(*dlen >= 3 && (*d)[0]==0 &&
 422                 sldns_read_uint16((*d)+1)==LDNS_RR_TYPE_OPT) {
 423                 /* perform EDNS OPT processing */
 424                 return sldns_wire2str_edns_scan(d, dlen, s, slen, pkt, pktlen);
 425         }
 426
 427         /* try to scan the rdata with pretty-printing, but if that fails, then
 428          * scan the rdata as an unknown RR type */
 429         w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
 430         w += sldns_str_print(s, slen, "\t");
 431         dname_off = rrlen-(*dlen);
 432         if(*dlen == 4) {
 433                 /* like a question-RR */
 434                 uint16_t t = sldns_read_uint16(*d);
 435                 uint16_t c = sldns_read_uint16((*d)+2);
 436                 (*d)+=4;
 437                 (*dlen)-=4;
 438                 w += sldns_wire2str_class_print(s, slen, c);
 439                 w += sldns_str_print(s, slen, "\t");
 440                 w += sldns_wire2str_type_print(s, slen, t);
 441                 w += sldns_str_print(s, slen, " ; Error no ttl,rdata\n");
 442                 return w;
 443         }
 444         if(*dlen < 8) {
 445                 if(*dlen == 0)
 446                         return w + sldns_str_print(s, slen, ";Error missing RR\n");
 447                 w += print_remainder_hex(";Error partial RR 0x", d, dlen, s, slen);
 448                 return w + sldns_str_print(s, slen, "\n");
 449         }
 450         rrtype = sldns_read_uint16(*d);
 451         w += sldns_rr_tcttl_scan(d, dlen, s, slen);
 452         w += sldns_str_print(s, slen, "\t");
 453
 454         /* rdata */
 455         if(*dlen < 2) {
 456                 if(*dlen == 0)
 457                         return w + sldns_str_print(s, slen, ";Error missing rdatalen\n");
 458                 w += print_remainder_hex(";Error missing rdatalen 0x",
 459                         d, dlen, s, slen);
 460                 return w + sldns_str_print(s, slen, "\n");
 461         }
 462         rdlen = sldns_read_uint16(*d);
 463         ordlen = rdlen;
 464         (*d)+=2;
 465         (*dlen)-=2;
 466         if(*dlen < rdlen) {
 467                 w += sldns_str_print(s, slen, "\\# %u ", (unsigned)rdlen);
 468                 if(*dlen == 0)
 469                         return w + sldns_str_print(s, slen, ";Error missing rdata\n");
 470                 w += print_remainder_hex(";Error partial rdata 0x", d, dlen, s, slen);
 471                 return w + sldns_str_print(s, slen, "\n");
 472         }
 473         w += sldns_wire2str_rdata_scan(d, &rdlen, s, slen, rrtype, pkt, pktlen);
 474         (*dlen) -= (ordlen-rdlen);
 475
 476         /* default comment */
 477         w += sldns_wire2str_rr_comment_print(s, slen, rr, rrlen, dname_off,
 478                 rrtype);
 479         w += sldns_str_print(s, slen, "\n");
 480         return w;
 481 }
 482
 483 int sldns_wire2str_rrquestion_scan(uint8_t** d, size_t* dlen, char** s,
 484         size_t* slen, uint8_t* pkt, size_t pktlen)
 485 {
 486         int w = 0;
 487         uint16_t t, c;
 488         w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
 489         w += sldns_str_print(s, slen, "\t");
 490         if(*dlen < 4) {
 491                 if(*dlen == 0)
 492                         return w + sldns_str_print(s, slen, "Error malformed\n");
 493                 w += print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
 494                 return w + sldns_str_print(s, slen, "\n");
 495         }
 496         t = sldns_read_uint16(*d);
 497         c = sldns_read_uint16((*d)+2);
 498         (*d)+=4;
 499         (*dlen)-=4;
 500         w += sldns_wire2str_class_print(s, slen, c);
 501         w += sldns_str_print(s, slen, "\t");
 502         w += sldns_wire2str_type_print(s, slen, t);
 503         w += sldns_str_print(s, slen, "\n");
 504         return w;
 505 }
 506
 507 int sldns_wire2str_rr_unknown_scan(uint8_t** d, size_t* dlen, char** s,
 508         size_t* slen, uint8_t* pkt, size_t pktlen)
 509 {
 510         size_t rdlen, ordlen;
 511         int w = 0;
 512         w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
 513         w += sldns_str_print(s, slen, "\t");
 514         w += sldns_rr_tcttl_scan(d, dlen, s, slen);
 515         w += sldns_str_print(s, slen, "\t");
 516         if(*dlen < 2) {
 517                 if(*dlen == 0)
 518                         return w + sldns_str_print(s, slen, ";Error missing rdatalen\n");
 519                 w += print_remainder_hex(";Error missing rdatalen 0x",
 520                         d, dlen, s, slen);
 521                 return w + sldns_str_print(s, slen, "\n");
 522         }
 523         rdlen = sldns_read_uint16(*d);
 524         ordlen = rdlen;
 525         (*d) += 2;
 526         (*dlen) -= 2;
 527         if(*dlen < rdlen) {
 528                 w += sldns_str_print(s, slen, "\\# %u ", (unsigned)rdlen);
 529                 if(*dlen == 0)
 530                         return w + sldns_str_print(s, slen, ";Error missing rdata\n");
 531                 w += print_remainder_hex(";Error partial rdata 0x", d, dlen, s, slen);
 532                 return w + sldns_str_print(s, slen, "\n");
 533         }
 534         w += sldns_wire2str_rdata_unknown_scan(d, &rdlen, s, slen);
 535         (*dlen) -= (ordlen-rdlen);
 536         w += sldns_str_print(s, slen, "\n");
 537         return w;
 538 }
 539
 540 /** print rr comment for type DNSKEY */
 541 static int rr_comment_dnskey(char** s, size_t* slen, uint8_t* rr,
 542         size_t rrlen, size_t dname_off)
 543 {
 544         size_t rdlen;
 545         uint8_t* rdata;
 546         int flags, w = 0;
 547         if(rrlen < dname_off + 10) return 0;
 548         rdlen = sldns_read_uint16(rr+dname_off+8);
 549         if(rrlen < dname_off + 10 + rdlen) return 0;
 550         rdata = rr + dname_off + 10;
 551         flags = (int)sldns_read_uint16(rdata);
 552         w += sldns_str_print(s, slen, " ;{");
 553
 554         /* id */
 555         w += sldns_str_print(s, slen, "id = %u",
 556                 sldns_calc_keytag_raw(rdata, rdlen));
 557
 558         /* flags */
 559         if((flags&LDNS_KEY_ZONE_KEY)) {
 560                 if((flags&LDNS_KEY_SEP_KEY))
 561                         w += sldns_str_print(s, slen, " (ksk)");
 562                 else    w += sldns_str_print(s, slen, " (zsk)");
 563         }
 564
 565         /* keysize */
 566         if(rdlen > 4) {
 567                 w += sldns_str_print(s, slen, ", ");
 568                 w += sldns_str_print(s, slen, "size = %db",
 569                         (int)sldns_rr_dnskey_key_size_raw(
 570                         (unsigned char*)rdata+4, rdlen-4, (int)(rdata[3])));
 571         }
 572
 573         w += sldns_str_print(s, slen, "}");
 574         return w;
 575 }
 576
 577 /** print rr comment for type RRSIG */
 578 static int rr_comment_rrsig(char** s, size_t* slen, uint8_t* rr,
 579         size_t rrlen, size_t dname_off)
 580 {
 581         size_t rdlen;
 582         uint8_t* rdata;
 583         if(rrlen < dname_off + 10) return 0;
 584         rdlen = sldns_read_uint16(rr+dname_off+8);
 585         if(rrlen < dname_off + 10 + rdlen) return 0;
 586         rdata = rr + dname_off + 10;
 587         if(rdlen < 18) return 0;
 588         return sldns_str_print(s, slen, " ;{id = %d}",
 589                 (int)sldns_read_uint16(rdata+16));
 590 }
 591
 592 /** print rr comment for type NSEC3 */
 593 static int rr_comment_nsec3(char** s, size_t* slen, uint8_t* rr,
 594         size_t rrlen, size_t dname_off)
 595 {
 596         size_t rdlen;
 597         uint8_t* rdata;
 598         int w = 0;
 599         if(rrlen < dname_off + 10) return 0;
 600         rdlen = sldns_read_uint16(rr+dname_off+8);
 601         if(rrlen < dname_off + 10 + rdlen) return 0;
 602         rdata = rr + dname_off + 10;
 603         if(rdlen < 2) return 0;
 604         if((rdata[1] & LDNS_NSEC3_VARS_OPTOUT_MASK))
 605                 w += sldns_str_print(s, slen, " ;{flags: optout}");
 606         return w;
 607 }
 608
 609 int sldns_wire2str_rr_comment_print(char** s, size_t* slen, uint8_t* rr,
 610         size_t rrlen, size_t dname_off, uint16_t rrtype)
 611 {
 612         if(rrtype == LDNS_RR_TYPE_DNSKEY) {
 613                 return rr_comment_dnskey(s, slen, rr, rrlen, dname_off);
 614         } else if(rrtype == LDNS_RR_TYPE_RRSIG) {
 615                 return rr_comment_rrsig(s, slen, rr, rrlen, dname_off);
 616         } else if(rrtype == LDNS_RR_TYPE_NSEC3) {
 617                 return rr_comment_nsec3(s, slen, rr, rrlen, dname_off);
 618         }
 619         return 0;
 620 }
 621
 622 int sldns_wire2str_header_scan(uint8_t** d, size_t* dlen, char** s,
 623         size_t* slen)
 624 {
 625         int w = 0;
 626         int opcode, rcode;
 627         w += sldns_str_print(s, slen, ";; ->>HEADER<<- ");
 628         if(*dlen == 0)
 629                 return w+sldns_str_print(s, slen, "Error empty packet");
 630         if(*dlen < 4)
 631                 return w+print_remainder_hex("Error header too short 0x", d, dlen, s, slen);
 632         opcode = (int)LDNS_OPCODE_WIRE(*d);
 633         rcode = (int)LDNS_RCODE_WIRE(*d);
 634         w += sldns_str_print(s, slen, "opcode: ");
 635         w += sldns_wire2str_opcode_print(s, slen, opcode);
 636         w += sldns_str_print(s, slen, ", ");
 637         w += sldns_str_print(s, slen, "rcode: ");
 638         w += sldns_wire2str_rcode_print(s, slen, rcode);
 639         w += sldns_str_print(s, slen, ", ");
 640         w += sldns_str_print(s, slen, "id: %d\n", (int)LDNS_ID_WIRE(*d));
 641         w += sldns_str_print(s, slen, ";; flags:");
 642         if(LDNS_QR_WIRE(*d)) w += sldns_str_print(s, slen, " qr");
 643         if(LDNS_AA_WIRE(*d)) w += sldns_str_print(s, slen, " aa");
 644         if(LDNS_TC_WIRE(*d)) w += sldns_str_print(s, slen, " tc");
 645         if(LDNS_RD_WIRE(*d)) w += sldns_str_print(s, slen, " rd");
 646         if(LDNS_CD_WIRE(*d)) w += sldns_str_print(s, slen, " cd");
 647         if(LDNS_RA_WIRE(*d)) w += sldns_str_print(s, slen, " ra");
 648         if(LDNS_AD_WIRE(*d)) w += sldns_str_print(s, slen, " ad");
 649         if(LDNS_Z_WIRE(*d))  w += sldns_str_print(s, slen, " z");
 650         w += sldns_str_print(s, slen, " ; ");
 651         if(*dlen < LDNS_HEADER_SIZE)
 652                 return w+print_remainder_hex("Error header too short 0x", d, dlen, s, slen);
 653         w += sldns_str_print(s, slen, "QUERY: %d, ", (int)LDNS_QDCOUNT(*d));
 654         w += sldns_str_print(s, slen, "ANSWER: %d, ", (int)LDNS_ANCOUNT(*d));
 655         w += sldns_str_print(s, slen, "AUTHORITY: %d, ", (int)LDNS_NSCOUNT(*d));
 656         w += sldns_str_print(s, slen, "ADDITIONAL: %d ", (int)LDNS_ARCOUNT(*d));
 657         *d += LDNS_HEADER_SIZE;
 658         *dlen -= LDNS_HEADER_SIZE;
 659         return w;
 660 }
 661
 662 int sldns_wire2str_rdata_scan(uint8_t** d, size_t* dlen, char** s,
 663         size_t* slen, uint16_t rrtype, uint8_t* pkt, size_t pktlen)
 664 {
 665         /* try to prettyprint, but if that fails, use unknown format */
 666         uint8_t* origd = *d;
 667         char* origs = *s;
 668         size_t origdlen = *dlen, origslen = *slen;
 669         uint16_t r_cnt, r_max;
 670         sldns_rdf_type rdftype;
 671         int w = 0, n;
 672
 673         const sldns_rr_descriptor *desc = sldns_rr_descript(rrtype);
 674         if(!desc) /* unknown format */
 675                 return sldns_wire2str_rdata_unknown_scan(d, dlen, s, slen);
 676         /* dlen equals the rdatalen for the rdata */
 677
 678         r_max = sldns_rr_descriptor_maximum(desc);
 679         for(r_cnt=0; r_cnt < r_max; r_cnt++) {
 680                 if(*dlen == 0) {
 681                         if(r_cnt < sldns_rr_descriptor_minimum(desc))
 682                                 goto failed;
 683                         break; /* nothing more to print */
 684                 }
 685                 rdftype = sldns_rr_descriptor_field_type(desc, r_cnt);
 686                 if(r_cnt != 0)
 687                         w += sldns_str_print(s, slen, " ");
 688                 n = sldns_wire2str_rdf_scan(d, dlen, s, slen, rdftype,
 689                         pkt, pktlen);
 690                 if(n == -1) {
 691                 failed:
 692                         /* failed, use unknown format */
 693                         *d = origd; *s = origs;
 694                         *dlen = origdlen; *slen = origslen;
 695                         return sldns_wire2str_rdata_unknown_scan(d, dlen,
 696                                 s, slen);
 697                 }
 698                 w += n;
 699         }
 700         return w;
 701 }
 702
 703 int sldns_wire2str_rdata_unknown_scan(uint8_t** d, size_t* dlen, char** s,
 704         size_t* slen)
 705 {
 706         int w = 0;
 707
 708         /* print length */
 709         w += sldns_str_print(s, slen, "\\# %u", (unsigned)*dlen);
 710
 711         /* print rdlen in hex */
 712         if(*dlen != 0)
 713                 w += sldns_str_print(s, slen, " ");
 714         w += print_hex_buf(s, slen, *d, *dlen);
 715         (*d) += *dlen;
 716         (*dlen) = 0;
 717         return w;
 718 }
 719
 720 /** print and escape one character for a domain dname */
 721 static int dname_char_print(char** s, size_t* slen, uint8_t c)
 722 {
 723         if(c == '.' || c == ';' || c == '(' || c == ')' || c == '\\')
 724                 return sldns_str_print(s, slen, "\\%c", c);
 725         else if(!(isascii((unsigned char)c) && isgraph((unsigned char)c)))
 726                 return sldns_str_print(s, slen, "\\%03u", (unsigned)c);
 727         /* plain printout */
 728         if(*slen) {
 729                 **s = (char)c;
 730                 (*s)++;
 731                 (*slen)--;
 732         }
 733         return 1;
 734 }
 735
 736 int sldns_wire2str_dname_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
 737         uint8_t* pkt, size_t pktlen)
 738 {
 739         int w = 0;
 740         /* spool labels onto the string, use compression if its there */
 741         uint8_t* pos = *d;
 742         unsigned i, counter=0;
 743         const unsigned maxcompr = 1000; /* loop detection, max compr ptrs */
 744         int in_buf = 1;
 745         if(*dlen == 0) return sldns_str_print(s, slen, "ErrorMissingDname");
 746         if(*pos == 0) {
 747                 (*d)++;
 748                 (*dlen)--;
 749                 return sldns_str_print(s, slen, ".");
 750         }
 751         while(*pos) {
 752                 /* read label length */
 753                 uint8_t labellen = *pos++;
 754                 if(in_buf) { (*d)++; (*dlen)--; }
 755
 756                 /* find out what sort of label we have */
 757                 if((labellen&0xc0) == 0xc0) {
 758                         /* compressed */
 759                         uint16_t target = 0;
 760                         if(in_buf && *dlen == 0)
 761                                 return w + sldns_str_print(s, slen,
 762                                         "ErrorPartialDname");
 763                         else if(!in_buf && pos+1 > pkt+pktlen)
 764                                 return w + sldns_str_print(s, slen,
 765                                         "ErrorPartialDname");
 766                         target = ((labellen&0x3f)<<8) | *pos;
 767                         if(in_buf) { (*d)++; (*dlen)--; }
 768                         /* move to target, if possible */
 769                         if(!pkt || target >= pktlen)
 770                                 return w + sldns_str_print(s, slen,
 771                                         "ErrorComprPtrOutOfBounds");
 772                         if(counter++ > maxcompr)
 773                                 return w + sldns_str_print(s, slen,
 774                                         "ErrorComprPtrLooped");
 775                         in_buf = 0;
 776                         pos = pkt+target;
 777                         continue;
 778                 } else if((labellen&0xc0)) {
 779                         /* notimpl label type */
 780                         w += sldns_str_print(s, slen,
 781                                 "ErrorLABELTYPE%xIsUnknown",
 782                                 (int)(labellen&0xc0));
 783                         return w;
 784                 }
 785
 786                 /* spool label characters, end with '.' */
 787                 if(in_buf && *dlen < labellen) labellen = *dlen;
 788                 else if(!in_buf && pos+labellen > pkt+pktlen)
 789                         labellen = (uint8_t)(pkt + pktlen - pos);
 790                 for(i=0; i<(unsigned)labellen; i++) {
 791                         w += dname_char_print(s, slen, *pos++);
 792                 }
 793                 if(in_buf) {
 794                         (*d) += labellen;
 795                         (*dlen) -= labellen;
 796                         if(*dlen == 0) break;
 797                 }
 798                 w += sldns_str_print(s, slen, ".");
 799         }
 800         /* skip over final root label */
 801         if(in_buf && *dlen > 0) { (*d)++; (*dlen)--; }
 802         /* in case we printed no labels, terminate dname */
 803         if(w == 0) w += sldns_str_print(s, slen, ".");
 804         return w;
 805 }
 806
 807 int sldns_wire2str_opcode_print(char** s, size_t* slen, int opcode)
 808 {
 809         sldns_lookup_table *lt = sldns_lookup_by_id(sldns_opcodes, opcode);
 810         if (lt && lt->name) {
 811                 return sldns_str_print(s, slen, "%s", lt->name);
 812         }
 813         return sldns_str_print(s, slen, "OPCODE%u", (unsigned)opcode);
 814 }
 815
 816 int sldns_wire2str_rcode_print(char** s, size_t* slen, int rcode)
 817 {
 818         sldns_lookup_table *lt = sldns_lookup_by_id(sldns_rcodes, rcode);
 819         if (lt && lt->name) {
 820                 return sldns_str_print(s, slen, "%s", lt->name);
 821         }
 822         return sldns_str_print(s, slen, "RCODE%u", (unsigned)rcode);
 823 }
 824
 825 int sldns_wire2str_class_print(char** s, size_t* slen, uint16_t rrclass)
 826 {
 827         sldns_lookup_table *lt = sldns_lookup_by_id(sldns_rr_classes,
 828                 (int)rrclass);
 829         if (lt && lt->name) {
 830                 return sldns_str_print(s, slen, "%s", lt->name);
 831         }
 832         return sldns_str_print(s, slen, "CLASS%u", (unsigned)rrclass);
 833 }
 834
 835 int sldns_wire2str_type_print(char** s, size_t* slen, uint16_t rrtype)
 836 {
 837         const sldns_rr_descriptor *descriptor = sldns_rr_descript(rrtype);
 838         if (descriptor && descriptor->_name) {
 839                 return sldns_str_print(s, slen, "%s", descriptor->_name);
 840         }
 841         return sldns_str_print(s, slen, "TYPE%u", (unsigned)rrtype);
 842 }
 843
 844 int sldns_wire2str_edns_option_code_print(char** s, size_t* slen,
 845         uint16_t opcode)
 846 {
 847         sldns_lookup_table *lt = sldns_lookup_by_id(sldns_edns_options,
 848                 (int)opcode);
 849         if (lt && lt->name) {
 850                 return sldns_str_print(s, slen, "%s", lt->name);
 851         }
 852         return sldns_str_print(s, slen, "OPT%u", (unsigned)opcode);
 853 }
 854
 855 int sldns_wire2str_class_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
 856 {
 857         uint16_t c;
 858         if(*dlen == 0) return 0;
 859         if(*dlen < 2) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
 860         c = sldns_read_uint16(*d);
 861         (*d)+=2;
 862         (*dlen)-=2;
 863         return sldns_wire2str_class_print(s, slen, c);
 864 }
 865
 866 int sldns_wire2str_type_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
 867 {
 868         uint16_t t;
 869         if(*dlen == 0) return 0;
 870         if(*dlen < 2) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
 871         t = sldns_read_uint16(*d);
 872         (*d)+=2;
 873         (*dlen)-=2;
 874         return sldns_wire2str_type_print(s, slen, t);
 875 }
 876
 877 int sldns_wire2str_ttl_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen)
 878 {
 879         uint32_t ttl;
 880         if(*dlen == 0) return 0;
 881         if(*dlen < 4) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen);
 882         ttl = sldns_read_uint32(*d);
 883         (*d)+=4;
 884         (*dlen)-=4;
 885         return sldns_str_print(s, slen, "%u", (unsigned)ttl);
 886 }
 887
 888 int sldns_wire2str_rdf_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
 889         int rdftype, uint8_t* pkt, size_t pktlen)
 890 {
 891         if(*dlen == 0) return 0;
 892         switch(rdftype) {
 893         case LDNS_RDF_TYPE_NONE:
 894                 return 0;
 895         case LDNS_RDF_TYPE_DNAME:
 896                 return sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen);
 897         case LDNS_RDF_TYPE_INT8:
 898                 return sldns_wire2str_int8_scan(d, dlen, s, slen);
 899         case LDNS_RDF_TYPE_INT16:
 900                 return sldns_wire2str_int16_scan(d, dlen, s, slen);
 901         case LDNS_RDF_TYPE_INT32:
 902                 return sldns_wire2str_int32_scan(d, dlen, s, slen);
 903         case LDNS_RDF_TYPE_PERIOD:
 904                 return sldns_wire2str_period_scan(d, dlen, s, slen);
 905         case LDNS_RDF_TYPE_TSIGTIME:
 906                 return sldns_wire2str_tsigtime_scan(d, dlen, s, slen);
 907         case LDNS_RDF_TYPE_A:
 908                 return sldns_wire2str_a_scan(d, dlen, s, slen);
 909         case LDNS_RDF_TYPE_AAAA:
 910                 return sldns_wire2str_aaaa_scan(d, dlen, s, slen);
 911         case LDNS_RDF_TYPE_STR:
 912                 return sldns_wire2str_str_scan(d, dlen, s, slen);
 913         case LDNS_RDF_TYPE_APL:
 914                 return sldns_wire2str_apl_scan(d, dlen, s, slen);
 915         case LDNS_RDF_TYPE_B32_EXT:
 916                 return sldns_wire2str_b32_ext_scan(d, dlen, s, slen);
 917         case LDNS_RDF_TYPE_B64:
 918                 return sldns_wire2str_b64_scan(d, dlen, s, slen);
 919         case LDNS_RDF_TYPE_HEX:
 920                 return sldns_wire2str_hex_scan(d, dlen, s, slen);
 921         case LDNS_RDF_TYPE_NSEC:
 922                 return sldns_wire2str_nsec_scan(d, dlen, s, slen);
 923         case LDNS_RDF_TYPE_NSEC3_SALT:
 924                 return sldns_wire2str_nsec3_salt_scan(d, dlen, s, slen);
 925         case LDNS_RDF_TYPE_TYPE:
 926                 return sldns_wire2str_type_scan(d, dlen, s, slen);
 927         case LDNS_RDF_TYPE_CLASS:
 928                 return sldns_wire2str_class_scan(d, dlen, s, slen);
 929         case LDNS_RDF_TYPE_CERT_ALG:
 930                 return sldns_wire2str_cert_alg_scan(d, dlen, s, slen);
 931         case LDNS_RDF_TYPE_ALG:
 932                 return sldns_wire2str_alg_scan(d, dlen, s, slen);
 933         case LDNS_RDF_TYPE_UNKNOWN:
 934                 return sldns_wire2str_unknown_scan(d, dlen, s, slen);
 935         case LDNS_RDF_TYPE_TIME:
 936                 return sldns_wire2str_time_scan(d, dlen, s, slen);
 937         case LDNS_RDF_TYPE_LOC:
 938                 return sldns_wire2str_loc_scan(d, dlen, s, slen);
 939         case LDNS_RDF_TYPE_WKS:
 940         case LDNS_RDF_TYPE_SERVICE:
 941                 return sldns_wire2str_wks_scan(d, dlen, s, slen);
 942         case LDNS_RDF_TYPE_NSAP:
 943                 return sldns_wire2str_nsap_scan(d, dlen, s, slen);
 944         case LDNS_RDF_TYPE_ATMA:
 945                 return sldns_wire2str_atma_scan(d, dlen, s, slen);
 946         case LDNS_RDF_TYPE_IPSECKEY:
 947                 return sldns_wire2str_ipseckey_scan(d, dlen, s, slen, pkt,
 948                         pktlen);
 949         case LDNS_RDF_TYPE_HIP:
 950                 return sldns_wire2str_hip_scan(d, dlen, s, slen);
 951         case LDNS_RDF_TYPE_INT16_DATA:
 952                 return sldns_wire2str_int16_data_scan(d, dlen, s, slen);
 953         case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
 954                 return sldns_wire2str_b32_ext_scan(d, dlen, s, slen);
 955         case LDNS_RDF_TYPE_ILNP64:
 956                 return sldns_wire2str_ilnp64_scan(d, dlen, s, slen);
 957         case LDNS_RDF_TYPE_EUI48:
 958                 return sldns_wire2str_eui48_scan(d, dlen, s, slen);
 959         case LDNS_RDF_TYPE_EUI64:
 960                 return sldns_wire2str_eui64_scan(d, dlen, s, slen);
 961         case LDNS_RDF_TYPE_TAG:
 962                 return sldns_wire2str_tag_scan(d, dlen, s, slen);
 963         case LDNS_RDF_TYPE_LONG_STR:
 964                 return sldns_wire2str_long_str_scan(d, dlen, s, slen);
 965         }
 966         /* unknown rdf type */
 967         return -1;
 968 }
 969
 970 int sldns_wire2str_int8_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 971 {
 972         int w;
 973         if(*dl < 1) return -1;
 974         w = sldns_str_print(s, sl, "%u", (unsigned)**d);
 975         (*d)++;
 976         (*dl)--;
 977         return w;
 978 }
 979
 980 int sldns_wire2str_int16_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 981 {
 982         int w;
 983         if(*dl < 2) return -1;
 984         w = sldns_str_print(s, sl, "%lu", (unsigned long)sldns_read_uint16(*d));
 985         (*d)+=2;
 986         (*dl)-=2;
 987         return w;
 988 }
 989
 990 int sldns_wire2str_int32_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 991 {
 992         int w;
 993         if(*dl < 4) return -1;
 994         w = sldns_str_print(s, sl, "%lu", (unsigned long)sldns_read_uint32(*d));
 995         (*d)+=4;
 996         (*dl)-=4;
 997         return w;
 998 }
 999
1000 int sldns_wire2str_period_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1001 {
1002         int w;
1003         if(*dl < 4) return -1;
1004         w = sldns_str_print(s, sl, "%u", (unsigned)sldns_read_uint32(*d));
1005         (*d)+=4;
1006         (*dl)-=4;
1007         return w;
1008 }
1009
1010 int sldns_wire2str_tsigtime_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1011 {
1012         /* tsigtime is 48 bits network order unsigned integer */
1013         int w;
1014         uint64_t tsigtime = 0;
1015         uint64_t d0, d1, d2, d3, d4, d5;
1016         if(*dl < 6) return -1;
1017         d0 = (*d)[0]; /* cast to uint64 for shift operations */
1018         d1 = (*d)[1];
1019         d2 = (*d)[2];
1020         d3 = (*d)[3];
1021         d4 = (*d)[4];
1022         d5 = (*d)[5];
1023         tsigtime = (d0<<40) | (d1<<32) | (d2<<24) | (d3<<16) | (d4<<8) | d5;
1024 #ifndef USE_WINSOCK
1025         w = sldns_str_print(s, sl, "%llu", (long long)tsigtime);
1026 #else
1027         w = sldns_str_print(s, sl, "%I64u", (long long)tsigtime);
1028 #endif
1029         (*d)+=6;
1030         (*dl)-=6;
1031         return w;
1032 }
1033
1034 int sldns_wire2str_a_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1035 {
1036         char buf[32];
1037         int w;
1038         if(*dl < 4) return -1;
1039         if(!inet_ntop(AF_INET, *d, buf, (socklen_t)sizeof(buf)))
1040                 return -1;
1041         w = sldns_str_print(s, sl, "%s", buf);
1042         (*d)+=4;
1043         (*dl)-=4;
1044         return w;
1045 }
1046
1047 int sldns_wire2str_aaaa_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1048 {
1049 #ifdef AF_INET6
1050         char buf[64];
1051         int w;
1052         if(*dl < 16) return -1;
1053         if(!inet_ntop(AF_INET6, *d, buf, (socklen_t)sizeof(buf)))
1054                 return -1;
1055         w = sldns_str_print(s, sl, "%s", buf);
1056         (*d)+=16;
1057         (*dl)-=16;
1058         return w;
1059 #else
1060         return -1;
1061 #endif
1062 }
1063
1064 /** printout escaped TYPE_STR character */
1065 static int str_char_print(char** s, size_t* sl, uint8_t c)
1066 {
1067         if(isprint((unsigned char)c) || c == '\t') {
1068                 if(c == '\"' || c == '\\')
1069                         return sldns_str_print(s, sl, "\\%c", c);
1070                 if(*sl) {
1071                         **s = (char)c;
1072                         (*s)++;
1073                         (*sl)--;
1074                 }
1075                 return 1;
1076         }
1077         return sldns_str_print(s, sl, "\\%03u", (unsigned)c);
1078 }
1079
1080 int sldns_wire2str_str_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1081 {
1082         int w = 0;
1083         size_t i, len;
1084         if(*dl < 1) return -1;
1085         len = **d;
1086         if(*dl < 1+len) return -1;
1087         (*d)++;
1088         (*dl)--;
1089         w += sldns_str_print(s, sl, "\"");
1090         for(i=0; i<len; i++)
1091                 w += str_char_print(s, sl, (*d)[i]);
1092         w += sldns_str_print(s, sl, "\"");
1093         (*d)+=len;
1094         (*dl)-=len;
1095         return w;
1096 }
1097
1098 int sldns_wire2str_apl_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1099 {
1100         int i, w = 0;
1101         uint16_t family;
1102         uint8_t negation, prefix, adflength;
1103         if(*dl < 4) return -1;
1104         family = sldns_read_uint16(*d);
1105         prefix = (*d)[2];
1106         negation = ((*d)[3] & LDNS_APL_NEGATION);
1107         adflength = ((*d)[3] & LDNS_APL_MASK);
1108         if(*dl < 4+(size_t)adflength) return -1;
1109         if(family != LDNS_APL_IP4 && family != LDNS_APL_IP6)
1110                 return -1; /* unknown address family */
1111         if(negation)
1112                 w += sldns_str_print(s, sl, "!");
1113         w += sldns_str_print(s, sl, "%u:", (unsigned)family);
1114         if(family == LDNS_APL_IP4) {
1115                 /* check if prefix <32 ? */
1116                 /* address is variable length 0 - 4 */
1117                 for(i=0; i<4; i++) {
1118                         if(i > 0)
1119                                 w += sldns_str_print(s, sl, ".");
1120                         if(i < (int)adflength)
1121                                 w += sldns_str_print(s, sl, "%d", (*d)[4+i]);
1122                         else    w += sldns_str_print(s, sl, "0");
1123                 }
1124         } else if(family == LDNS_APL_IP6) {
1125                 /* check if prefix <128 ? */
1126                 /* address is variable length 0 - 16 */
1127                 for(i=0; i<16; i++) {
1128                         if(i%2 == 0 && i>0)
1129                                 w += sldns_str_print(s, sl, ":");
1130                         if(i < (int)adflength)
1131                                 w += sldns_str_print(s, sl, "%02x", (*d)[4+i]);
1132                         else    w += sldns_str_print(s, sl, "00");
1133                 }
1134         }
1135         w += sldns_str_print(s, sl, "/%u", (unsigned)prefix);
1136         (*d) += 4+adflength;
1137         (*dl) -= 4+adflength;
1138         return w;
1139 }
1140
1141 int sldns_wire2str_b32_ext_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1142 {
1143         size_t datalen;
1144         size_t sz;
1145         if(*dl < 1) return -1;
1146         datalen = (*d)[0];
1147         if(*dl < 1+datalen) return -1;
1148         sz = sldns_b32_ntop_calculate_size(datalen);
1149         if(*sl < sz+1) {
1150                 (*d) += datalen+1;
1151                 (*dl) -= (datalen+1);
1152                 return (int)sz; /* out of space really, but would need buffer
1153                         in order to truncate the output */
1154         }
1155         sldns_b32_ntop_extended_hex((*d)+1, datalen, *s, *sl);
1156         (*d) += datalen+1;
1157         (*dl) -= (datalen+1);
1158         (*s) += sz;
1159         (*sl) -= sz;
1160         return (int)sz;
1161 }
1162
1163 /** scan number of bytes from wire into b64 presentation format */
1164 static int sldns_wire2str_b64_scan_num(uint8_t** d, size_t* dl, char** s,
1165         size_t* sl, size_t num)
1166 {
1167         /* b64_ntop_calculate size includes null at the end */
1168         size_t sz = sldns_b64_ntop_calculate_size(num)-1;
1169         if(*sl < sz+1) {
1170                 (*d) += num;
1171                 (*dl) -= num;
1172                 return (int)sz; /* out of space really, but would need buffer
1173                         in order to truncate the output */
1174         }
1175         sldns_b64_ntop(*d, num, *s, *sl);
1176         (*d) += num;
1177         (*dl) -= num;
1178         (*s) += sz;
1179         (*sl) -= sz;
1180         return (int)sz;
1181 }
1182
1183 int sldns_wire2str_b64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1184 {
1185         return sldns_wire2str_b64_scan_num(d, dl, s, sl, *dl);
1186 }
1187
1188 int sldns_wire2str_hex_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1189 {
1190         return print_remainder_hex("", d, dl, s, sl);
1191 }
1192
1193 int sldns_wire2str_nsec_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1194 {
1195         uint8_t* p = *d;
1196         size_t pl = *dl;
1197         unsigned i, bit, window, block_len;
1198         uint16_t t;
1199         int w = 0;
1200
1201         /* check for errors */
1202         while(pl) {
1203                 if(pl < 2) return -1;
1204                 block_len = (unsigned)p[1];
1205                 if(pl < 2+block_len) return -1;
1206                 p += block_len+2;
1207                 pl -= block_len+2;
1208         }
1209
1210         /* do it */
1211         p = *d;
1212         pl = *dl;
1213         while(pl) {
1214                 if(pl < 2) return -1; /* cannot happen */
1215                 window = (unsigned)p[0];
1216                 block_len = (unsigned)p[1];
1217                 if(pl < 2+block_len) return -1; /* cannot happen */
1218                 p += 2;
1219                 for(i=0; i<block_len; i++) {
1220                         if(p[i] == 0) continue;
1221                         /* base type number for this octet */
1222                         t = ((window)<<8) | (i << 3);
1223                         for(bit=0; bit<8; bit++) {
1224                                 if((p[i]&(0x80>>bit))) {
1225                                         if(w) w += sldns_str_print(s, sl, " ");
1226                                         w += sldns_wire2str_type_print(s, sl,
1227                                                 t+bit);
1228                                 }
1229                         }
1230                 }
1231                 p += block_len;
1232                 pl -= block_len+2;
1233         }
1234         (*d) += *dl;
1235         (*dl) = 0;
1236         return w;
1237 }
1238
1239 int sldns_wire2str_nsec3_salt_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1240 {
1241         size_t salt_len;
1242         int w;
1243         if(*dl < 1) return -1;
1244         salt_len = (size_t)(*d)[0];
1245         if(*dl < 1+salt_len) return -1;
1246         (*d)++;
1247         (*dl)--;
1248         if(salt_len == 0) {
1249                 return sldns_str_print(s, sl, "-");
1250         }
1251         w = print_hex_buf(s, sl, *d, salt_len);
1252         (*dl)-=salt_len;
1253         (*d)+=salt_len;
1254         return w;
1255 }
1256
1257 int sldns_wire2str_cert_alg_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1258 {
1259         sldns_lookup_table *lt;
1260         int data, w;
1261         if(*dl < 2) return -1;
1262         data = (int)sldns_read_uint16(*d);
1263         lt = sldns_lookup_by_id(sldns_cert_algorithms, data);
1264         if(lt && lt->name)
1265                 w = sldns_str_print(s, sl, "%s", lt->name);
1266         else    w = sldns_str_print(s, sl, "%d", data);
1267         (*dl)-=2;
1268         (*d)+=2;
1269         return w;
1270 }
1271
1272 int sldns_wire2str_alg_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1273 {
1274         /* don't use algorithm mnemonics in the presentation format
1275          * this kind of got sneaked into the rfc's */
1276         return sldns_wire2str_int8_scan(d, dl, s, sl);
1277 }
1278
1279 int sldns_wire2str_unknown_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1280 {
1281         return sldns_wire2str_rdata_unknown_scan(d, dl, s, sl);
1282 }
1283
1284 int sldns_wire2str_time_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1285 {
1286         /* create a YYYYMMDDHHMMSS string if possible */
1287         struct tm tm;
1288         char date_buf[16];
1289         uint32_t t;
1290         memset(&tm, 0, sizeof(tm));
1291         if(*dl < 4) return -1;
1292         t = sldns_read_uint32(*d);
1293         date_buf[15]=0;
1294         if(sldns_serial_arithmitics_gmtime_r(t, time(NULL), &tm) &&
1295                 strftime(date_buf, 15, "%Y%m%d%H%M%S", &tm)) {
1296                 (*d) += 4;
1297                 (*dl) -= 4;
1298                 return sldns_str_print(s, sl, "%s", date_buf);
1299         }
1300         return -1;
1301 }
1302
1303 static int
1304 loc_cm_print(char** str, size_t* sl, uint8_t mantissa, uint8_t exponent)
1305 {
1306         int w = 0;
1307         uint8_t i;
1308         /* is it 0.<two digits> ? */
1309         if(exponent < 2) {
1310                 if(exponent == 1)
1311                         mantissa *= 10;
1312                 return sldns_str_print(str, sl, "0.%02ld", (long)mantissa);
1313         }
1314         /* always <digit><string of zeros> */
1315         w += sldns_str_print(str, sl, "%d", (int)mantissa);
1316         for(i=0; i<exponent-2; i++)
1317                 w += sldns_str_print(str, sl, "0");
1318         return w;
1319 }
1320
1321 int sldns_wire2str_loc_scan(uint8_t** d, size_t* dl, char** str, size_t* sl)
1322 {
1323         /* we could do checking (ie degrees < 90 etc)? */
1324         uint8_t version;
1325         uint8_t size;
1326         uint8_t horizontal_precision;
1327         uint8_t vertical_precision;
1328         uint32_t longitude;
1329         uint32_t latitude;
1330         uint32_t altitude;
1331         char northerness;
1332         char easterness;
1333         uint32_t h;
1334         uint32_t m;
1335         double s;
1336         uint32_t equator = (uint32_t)1 << 31; /* 2**31 */
1337         int w = 0;
1338
1339         if(*dl < 16) return -1;
1340         version = (*d)[0];
1341         if(version != 0)
1342                 return sldns_wire2str_hex_scan(d, dl, str, sl);
1343         size = (*d)[1];
1344         horizontal_precision = (*d)[2];
1345         vertical_precision = (*d)[3];
1346
1347         latitude = sldns_read_uint32((*d)+4);
1348         longitude = sldns_read_uint32((*d)+8);
1349         altitude = sldns_read_uint32((*d)+12);
1350
1351         if (latitude > equator) {
1352                 northerness = 'N';
1353                 latitude = latitude - equator;
1354         } else {
1355                 northerness = 'S';
1356                 latitude = equator - latitude;
1357         }
1358         h = latitude / (1000 * 60 * 60);
1359         latitude = latitude % (1000 * 60 * 60);
1360         m = latitude / (1000 * 60);
1361         latitude = latitude % (1000 * 60);
1362         s = (double) latitude / 1000.0;
1363         w += sldns_str_print(str, sl, "%02u %02u %06.3f %c ",
1364                 h, m, s, northerness);
1365
1366         if (longitude > equator) {
1367                 easterness = 'E';
1368                 longitude = longitude - equator;
1369         } else {
1370                 easterness = 'W';
1371                 longitude = equator - longitude;
1372         }
1373         h = longitude / (1000 * 60 * 60);
1374         longitude = longitude % (1000 * 60 * 60);
1375         m = longitude / (1000 * 60);
1376         longitude = longitude % (1000 * 60);
1377         s = (double) longitude / (1000.0);
1378         w += sldns_str_print(str, sl, "%02u %02u %06.3f %c ",
1379                 h, m, s, easterness);
1380
1381         s = ((double) altitude) / 100;
1382         s -= 100000;
1383
1384         if(altitude%100 != 0)
1385                 w += sldns_str_print(str, sl, "%.2f", s);
1386         else
1387                 w += sldns_str_print(str, sl, "%.0f", s);
1388
1389         w += sldns_str_print(str, sl, "m ");
1390
1391         w += loc_cm_print(str, sl, (size & 0xf0) >> 4, size & 0x0f);
1392         w += sldns_str_print(str, sl, "m ");
1393
1394         w += loc_cm_print(str, sl, (horizontal_precision & 0xf0) >> 4,
1395                 horizontal_precision & 0x0f);
1396         w += sldns_str_print(str, sl, "m ");
1397
1398         w += loc_cm_print(str, sl, (vertical_precision & 0xf0) >> 4,
1399                 vertical_precision & 0x0f);
1400         w += sldns_str_print(str, sl, "m");
1401
1402         (*d)+=16;
1403         (*dl)-=16;
1404         return w;
1405 }
1406
1407 int sldns_wire2str_wks_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1408 {
1409         /* protocol, followed by bitmap of services */
1410         const char* proto_name = NULL;
1411         struct protoent *protocol;
1412         struct servent *service;
1413         uint8_t protocol_nr;
1414         int bit, port, w = 0;
1415         size_t i;
1416         /* we cannot print with strings because they
1417          * are not portable, the presentation format may
1418          * not be able to be read in on another computer.  */
1419         int print_symbols = 0;
1420
1421         /* protocol */
1422         if(*dl < 1) return -1;
1423         protocol_nr = (*d)[0];
1424         (*d)++;
1425         (*dl)--;
1426         protocol = getprotobynumber((int)protocol_nr);
1427         if(protocol && (protocol->p_name != NULL)) {
1428                 w += sldns_str_print(s, sl, "%s", protocol->p_name);
1429                 proto_name = protocol->p_name;
1430         } else  {
1431                 w += sldns_str_print(s, sl, "%u", (unsigned)protocol_nr);
1432         }
1433
1434         for(i=0; i<*dl; i++) {
1435                 if((*d)[i] == 0)
1436                         continue;
1437                 for(bit=0; bit<8; bit++) {
1438                         if(!(((*d)[i])&(0x80>>bit)))
1439                                 continue;
1440                         port = (int)i*8 + bit;
1441
1442                         if(!print_symbols)
1443                                 service = NULL;
1444                         else
1445                                 service = getservbyport(
1446                                         (int)htons((uint16_t)port), proto_name);
1447                         if(service && service->s_name)
1448                                 w += sldns_str_print(s, sl, " %s",
1449                                         service->s_name);
1450                         else    w += sldns_str_print(s, sl, " %u",
1451                                         (unsigned)port);
1452                 }
1453         }
1454
1455 #ifdef HAVE_ENDSERVENT
1456         endservent();
1457 #endif
1458 #ifdef HAVE_ENDPROTOENT
1459         endprotoent();
1460 #endif
1461         (*d) += *dl;
1462         (*dl) = 0;
1463         return w;
1464 }
1465
1466 int sldns_wire2str_nsap_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1467 {
1468         return print_remainder_hex("0x", d, dl, s, sl);
1469 }
1470
1471 int sldns_wire2str_atma_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1472 {
1473         return print_remainder_hex("", d, dl, s, sl);
1474 }
1475
1476 /* internal scan routine that can modify arguments on failure */
1477 static int sldns_wire2str_ipseckey_scan_internal(uint8_t** d, size_t* dl,
1478         char** s, size_t* sl, uint8_t* pkt, size_t pktlen)
1479 {
1480         /* http://www.ietf.org/internet-drafts/draft-ietf-ipseckey-rr-12.txt*/
1481         uint8_t precedence, gateway_type, algorithm;
1482         int w = 0;
1483
1484         if(*dl < 3) return -1;
1485         precedence = (*d)[0];
1486         gateway_type = (*d)[1];
1487         algorithm = (*d)[2];
1488         if(gateway_type > 3)
1489                 return -1; /* unknown */
1490         (*d)+=3;
1491         (*dl)-=3;
1492         w += sldns_str_print(s, sl, "%d %d %d ",
1493                 (int)precedence, (int)gateway_type, (int)algorithm);
1494
1495         switch(gateway_type) {
1496         case 0: /* no gateway */
1497                 w += sldns_str_print(s, sl, ".");
1498                 break;
1499         case 1: /* ip4 */
1500                 w += sldns_wire2str_a_scan(d, dl, s, sl);
1501                 break;
1502         case 2: /* ip6 */
1503                 w += sldns_wire2str_aaaa_scan(d, dl, s, sl);
1504                 break;
1505         case 3: /* dname */
1506                 w += sldns_wire2str_dname_scan(d, dl, s, sl, pkt, pktlen);
1507                 break;
1508         default: /* unknown */
1509                 return -1;
1510         }
1511
1512         if(*dl < 1)
1513                 return -1;
1514         w += sldns_str_print(s, sl, " ");
1515         w += sldns_wire2str_b64_scan_num(d, dl, s, sl, *dl);
1516         return w;
1517 }
1518
1519 int sldns_wire2str_ipseckey_scan(uint8_t** d, size_t* dl, char** s, size_t* sl,
1520         uint8_t* pkt, size_t pktlen)
1521 {
1522         uint8_t* od = *d;
1523         char* os = *s;
1524         size_t odl = *dl, osl = *sl;
1525         int w=sldns_wire2str_ipseckey_scan_internal(d, dl, s, sl, pkt, pktlen);
1526         if(w == -1) {
1527                 *d = od;
1528                 *s = os;
1529                 *dl = odl;
1530                 *sl = osl;
1531                 return -1;
1532         }
1533         return w;
1534 }
1535
1536 int sldns_wire2str_hip_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1537 {
1538         int w;
1539         uint8_t algo, hitlen;
1540         uint16_t pklen;
1541
1542         /* read lengths */
1543         if(*dl < 4)
1544                 return -1;
1545         hitlen = (*d)[0];
1546         algo = (*d)[1];
1547         pklen = sldns_read_uint16((*d)+2);
1548         if(*dl < (size_t)4 + (size_t)hitlen + (size_t)pklen)
1549                 return -1;
1550
1551         /* write: algo hit pubkey */
1552         w = sldns_str_print(s, sl, "%u ", (unsigned)algo);
1553         w += print_hex_buf(s, sl, (*d)+4, hitlen);
1554         w += sldns_str_print(s, sl, " ");
1555         (*d)+=4+hitlen;
1556         (*dl)-= (4+hitlen);
1557         w += sldns_wire2str_b64_scan_num(d, dl, s, sl, pklen);
1558         return w;
1559 }
1560
1561 int sldns_wire2str_int16_data_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1562 {
1563         uint16_t n;
1564         if(*dl < 2)
1565                 return -1;
1566         n = sldns_read_uint16(*d);
1567         if(*dl < 2+(size_t)n)
1568                 return -1;
1569         (*d)+=2;
1570         (*dl)-=2;
1571         return sldns_wire2str_b64_scan_num(d, dl, s, sl, n);
1572 }
1573
1574 int sldns_wire2str_nsec3_next_owner_scan(uint8_t** d, size_t* dl, char** s,
1575         size_t* sl)
1576 {
1577         return sldns_wire2str_b32_ext_scan(d, dl, s, sl);
1578 }
1579
1580 int sldns_wire2str_ilnp64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1581 {
1582         int w;
1583         if(*dl < 8)
1584                 return -1;
1585         w = sldns_str_print(s, sl, "%.4x:%.4x:%.4x:%.4x",
1586                 sldns_read_uint16(*d), sldns_read_uint16((*d)+2),
1587                 sldns_read_uint16((*d)+4), sldns_read_uint16((*d)+6));
1588         (*d)+=8;
1589         (*dl)-=8;
1590         return w;
1591 }
1592
1593 int sldns_wire2str_eui48_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1594 {
1595         int w;
1596         if(*dl < 6)
1597                 return -1;
1598         w = sldns_str_print(s, sl, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x",
1599                 (*d)[0], (*d)[1], (*d)[2], (*d)[3], (*d)[4], (*d)[5]);
1600         (*d)+=6;
1601         (*dl)-=6;
1602         return w;
1603 }
1604
1605 int sldns_wire2str_eui64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1606 {
1607         int w;
1608         if(*dl < 8)
1609                 return -1;
1610         w = sldns_str_print(s, sl, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x-%.2x-%.2x",
1611                 (*d)[0], (*d)[1], (*d)[2], (*d)[3], (*d)[4], (*d)[5],
1612                 (*d)[6], (*d)[7]);
1613         (*d)+=8;
1614         (*dl)-=8;
1615         return w;
1616 }
1617
1618 int sldns_wire2str_tag_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1619 {
1620         size_t i, n;
1621         int w = 0;
1622         if(*dl < 1)
1623                 return -1;
1624         n = (size_t)((*d)[0]);
1625         if(*dl < 1+n)
1626                 return -1;
1627         for(i=0; i<n; i++)
1628                 if(!isalnum((unsigned char)(*d)[i]))
1629                         return -1;
1630         for(i=0; i<n; i++)
1631                 w += sldns_str_print(s, sl, "%c", (char)(*d)[i]);
1632         (*d)+=n+1;
1633         (*dl)-=(n+1);
1634         return w;
1635 }
1636
1637 int sldns_wire2str_long_str_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
1638 {
1639         size_t i;
1640         int w = 0;
1641         w += sldns_str_print(s, sl, "\"");
1642         for(i=0; i<*dl; i++)
1643                 w += str_char_print(s, sl, (*d)[i]);
1644         w += sldns_str_print(s, sl, "\"");
1645         (*d)+=*dl;
1646         (*dl)=0;
1647         return w;
1648 }
1649
1650 int sldns_wire2str_edns_llq_print(char** s, size_t* sl, uint8_t* data,
1651         size_t len)
1652 {
1653         /* LLQ constants */
1654         const char* llq_errors[] = {"NO-ERROR", "SERV-FULL", "STATIC",
1655                 "FORMAT-ERR", "NO-SUCH-LLQ", "BAD-VERS", "UNKNOWN_ERR"};
1656         const unsigned int llq_errors_num = 7;
1657         const char* llq_opcodes[] = {"LLQ-SETUP", "LLQ-REFRESH", "LLQ-EVENT"};
1658         const unsigned int llq_opcodes_num = 3;
1659         uint16_t version, llq_opcode, error_code;
1660         uint64_t llq_id;
1661         uint32_t lease_life; /* Requested or granted life of LLQ, in seconds */
1662         int w = 0;
1663
1664         /* read the record */
1665         if(len != 18) {
1666                 w += sldns_str_print(s, sl, "malformed LLQ ");
1667                 w += print_hex_buf(s, sl, data, len);
1668                 return w;
1669         }
1670         version = sldns_read_uint16(data);
1671         llq_opcode = sldns_read_uint16(data+2);
1672         error_code = sldns_read_uint16(data+4);
1673         memmove(&llq_id, data+6, sizeof(llq_id));
1674         lease_life = sldns_read_uint32(data+14);
1675
1676         /* print it */
1677         w += sldns_str_print(s, sl, "v%d ", (int)version);
1678         if(llq_opcode < llq_opcodes_num)
1679                 w += sldns_str_print(s, sl, "%s", llq_opcodes[llq_opcode]);
1680         else    w += sldns_str_print(s, sl, "opcode %d", (int)llq_opcode);
1681         if(error_code < llq_errors_num)
1682                 w += sldns_str_print(s, sl, " %s", llq_errors[error_code]);
1683         else    w += sldns_str_print(s, sl, " error %d", (int)error_code);
1684 #ifndef USE_WINSOCK
1685         w += sldns_str_print(s, sl, " id %llx lease-life %lu",
1686                 (unsigned long long)llq_id, (unsigned long)lease_life);
1687 #else
1688         w += sldns_str_print(s, sl, " id %I64x lease-life %lu",
1689                 (unsigned long long)llq_id, (unsigned long)lease_life);
1690 #endif
1691         return w;
1692 }
1693
1694 int sldns_wire2str_edns_ul_print(char** s, size_t* sl, uint8_t* data,
1695         size_t len)
1696 {
1697         uint32_t lease;
1698         int w = 0;
1699         if(len != 4) {
1700                 w += sldns_str_print(s, sl, "malformed UL ");
1701                 w += print_hex_buf(s, sl, data, len);
1702                 return w;
1703         }
1704         lease = sldns_read_uint32(data);
1705         w += sldns_str_print(s, sl, "lease %lu", (unsigned long)lease);
1706         return w;
1707 }
1708
1709 int sldns_wire2str_edns_nsid_print(char** s, size_t* sl, uint8_t* data,
1710         size_t len)
1711 {
1712         int w = 0;
1713         size_t i, printed=0;
1714         w += print_hex_buf(s, sl, data, len);
1715         for(i=0; i<len; i++) {
1716                 if(isprint((unsigned char)data[i]) || data[i] == '\t') {
1717                         if(!printed) {
1718                                 w += sldns_str_print(s, sl, " (");
1719                                 printed = 1;
1720                         }
1721                         w += sldns_str_print(s, sl, "%c", (char)data[i]);
1722                 }
1723         }
1724         if(printed)
1725                 w += sldns_str_print(s, sl, ")");
1726         return w;
1727 }
1728
1729 int sldns_wire2str_edns_dau_print(char** s, size_t* sl, uint8_t* data,
1730         size_t len)
1731 {
1732         sldns_lookup_table *lt;
1733         size_t i;
1734         int w = 0;
1735         for(i=0; i<len; i++) {
1736                 lt = sldns_lookup_by_id(sldns_algorithms, (int)data[i]);
1737                 if(lt && lt->name)
1738                         w += sldns_str_print(s, sl, " %s", lt->name);
1739                 else    w += sldns_str_print(s, sl, " %d", (int)data[i]);
1740         }
1741         return w;
1742 }
1743
1744 int sldns_wire2str_edns_dhu_print(char** s, size_t* sl, uint8_t* data,
1745         size_t len)
1746 {
1747         sldns_lookup_table *lt;
1748         size_t i;
1749         int w = 0;
1750         for(i=0; i<len; i++) {
1751                 lt = sldns_lookup_by_id(sldns_hashes, (int)data[i]);
1752                 if(lt && lt->name)
1753                         w += sldns_str_print(s, sl, " %s", lt->name);
1754                 else    w += sldns_str_print(s, sl, " %d", (int)data[i]);
1755         }
1756         return w;
1757 }
1758
1759 int sldns_wire2str_edns_n3u_print(char** s, size_t* sl, uint8_t* data,
1760         size_t len)
1761 {
1762         size_t i;
1763         int w = 0;
1764         for(i=0; i<len; i++) {
1765                 if(data[i] == 1)
1766                         w += sldns_str_print(s, sl, " SHA1");
1767                 else    w += sldns_str_print(s, sl, " %d", (int)data[i]);
1768         }
1769         return w;
1770 }
1771
1772 int sldns_wire2str_edns_subnet_print(char** s, size_t* sl, uint8_t* data,
1773         size_t len)
1774 {
1775         int w = 0;
1776         uint16_t family;
1777         uint8_t source, scope;
1778         if(len < 4) {
1779                 w += sldns_str_print(s, sl, "malformed subnet ");
1780                 w += print_hex_buf(s, sl, data, len);
1781                 return w;
1782         }
1783         family = sldns_read_uint16(data);
1784         source = data[2];
1785         scope = data[3];
1786         if(family == 1) {
1787                 /* IP4 */
1788                 char buf[64];
1789                 uint8_t ip4[4];
1790                 memset(ip4, 0, sizeof(ip4));
1791                 if(len-4 > 4) {
1792                         w += sldns_str_print(s, sl, "trailingdata:");
1793                         w += print_hex_buf(s, sl, data+4+4, len-4-4);
1794                         w += sldns_str_print(s, sl, " ");
1795                         len = 4+4;
1796                 }
1797                 memmove(ip4, data+4, len-4);
1798                 if(!inet_ntop(AF_INET, ip4, buf, (socklen_t)sizeof(buf))) {
1799                         w += sldns_str_print(s, sl, "ip4ntoperror ");
1800                         w += print_hex_buf(s, sl, data+4+4, len-4-4);
1801                 } else {
1802                         w += sldns_str_print(s, sl, "%s", buf);
1803                 }
1804         } else if(family == 2) {
1805                 /* IP6 */
1806                 char buf[64];
1807                 uint8_t ip6[16];
1808                 memset(ip6, 0, sizeof(ip6));
1809                 if(len-4 > 16) {
1810                         w += sldns_str_print(s, sl, "trailingdata:");
1811                         w += print_hex_buf(s, sl, data+4+16, len-4-16);
1812                         w += sldns_str_print(s, sl, " ");
1813                         len = 4+16;
1814                 }
1815                 memmove(ip6, data+4, len-4);
1816 #ifdef AF_INET6
1817                 if(!inet_ntop(AF_INET6, ip6, buf, (socklen_t)sizeof(buf))) {
1818                         w += sldns_str_print(s, sl, "ip6ntoperror ");
1819                         w += print_hex_buf(s, sl, data+4+4, len-4-4);
1820                 } else {
1821                         w += sldns_str_print(s, sl, "%s", buf);
1822                 }
1823 #else
1824                 w += print_hex_buf(s, sl, data+4+4, len-4-4);
1825 #endif
1826         } else {
1827                 /* unknown */
1828                 w += sldns_str_print(s, sl, "family %d ",
1829                         (int)family);
1830                 w += print_hex_buf(s, sl, data, len);
1831         }
1832         w += sldns_str_print(s, sl, "/%d scope /%d", (int)source, (int)scope);
1833         return w;
1834 }
1835
1836 int sldns_wire2str_edns_option_print(char** s, size_t* sl,
1837         uint16_t option_code, uint8_t* optdata, size_t optlen)
1838 {
1839         int w = 0;
1840         w += sldns_wire2str_edns_option_code_print(s, sl, option_code);
1841         w += sldns_str_print(s, sl, ": ");
1842         switch(option_code) {
1843         case LDNS_EDNS_LLQ:
1844                 w += sldns_wire2str_edns_llq_print(s, sl, optdata, optlen);
1845                 break;
1846         case LDNS_EDNS_UL:
1847                 w += sldns_wire2str_edns_ul_print(s, sl, optdata, optlen);
1848                 break;
1849         case LDNS_EDNS_NSID:
1850                 w += sldns_wire2str_edns_nsid_print(s, sl, optdata, optlen);
1851                 break;
1852         case LDNS_EDNS_DAU:
1853                 w += sldns_wire2str_edns_dau_print(s, sl, optdata, optlen);
1854                 break;
1855         case LDNS_EDNS_DHU:
1856                 w += sldns_wire2str_edns_dhu_print(s, sl, optdata, optlen);
1857                 break;
1858         case LDNS_EDNS_N3U:
1859                 w += sldns_wire2str_edns_n3u_print(s, sl, optdata, optlen);
1860                 break;
1861         case LDNS_EDNS_CLIENT_SUBNET:
1862                 w += sldns_wire2str_edns_subnet_print(s, sl, optdata, optlen);
1863                 break;
1864         default:
1865                 /* unknown option code */
1866                 w += print_hex_buf(s, sl, optdata, optlen);
1867                 break;
1868         }
1869         return w;
1870 }
1871
1872 /** print the edns options to string */
1873 static int
1874 print_edns_opts(char** s, size_t* sl, uint8_t* rdata, size_t rdatalen)
1875 {
1876         uint16_t option_code, option_len;
1877         int w = 0;
1878         while(rdatalen > 0) {
1879                 /* option name */
1880                 if(rdatalen < 4) {
1881                         w += sldns_str_print(s, sl, " ; malformed: ");
1882                         w += print_hex_buf(s, sl, rdata, rdatalen);
1883                         return w;
1884                 }
1885                 option_code = sldns_read_uint16(rdata);
1886                 option_len = sldns_read_uint16(rdata+2);
1887                 rdata += 4;
1888                 rdatalen -= 4;
1889
1890                 /* option value */
1891                 if(rdatalen < (size_t)option_len) {
1892                         w += sldns_str_print(s, sl, " ; malformed ");
1893                         w += sldns_wire2str_edns_option_code_print(s, sl,
1894                                 option_code);
1895                         w += sldns_str_print(s, sl, ": ");
1896                         w += print_hex_buf(s, sl, rdata, rdatalen);
1897                         return w;
1898                 }
1899                 w += sldns_str_print(s, sl, " ; ");
1900                 w += sldns_wire2str_edns_option_print(s, sl, option_code,
1901                         rdata, option_len);
1902                 rdata += option_len;
1903                 rdatalen -= option_len;
1904         }
1905         return w;
1906 }
1907
1908 int sldns_wire2str_edns_scan(uint8_t** data, size_t* data_len, char** str,
1909         size_t* str_len, uint8_t* pkt, size_t pktlen)
1910 {
1911         int w = 0;
1912         uint8_t ext_rcode, edns_version;
1913         uint16_t udpsize, edns_bits, rdatalen;
1914         w += sldns_str_print(str, str_len, "; EDNS:");
1915
1916         /* some input checks, domain name */
1917         if(*data_len < 1+10)
1918                 return w + print_remainder_hex("Error malformed 0x",
1919                         data, data_len, str, str_len);
1920         if(*data[0] != 0) {
1921                 return w + print_remainder_hex("Error nonrootdname 0x",
1922                         data, data_len, str, str_len);
1923         }
1924         (*data)++;
1925         (*data_len)--;
1926
1927         /* check type and read fixed contents */
1928         if(sldns_read_uint16((*data)) != LDNS_RR_TYPE_OPT) {
1929                 return w + print_remainder_hex("Error nottypeOPT 0x",
1930                         data, data_len, str, str_len);
1931         }
1932         udpsize = sldns_read_uint16((*data)+2);
1933         ext_rcode = (*data)[4];
1934         edns_version = (*data)[5];
1935         edns_bits = sldns_read_uint16((*data)+6);
1936         rdatalen = sldns_read_uint16((*data)+8);
1937         (*data)+=10;
1938         (*data_len)-=10;
1939
1940         w += sldns_str_print(str, str_len, " version: %u;",
1941                 (unsigned)edns_version);
1942         w += sldns_str_print(str, str_len, " flags:");
1943         if((edns_bits & LDNS_EDNS_MASK_DO_BIT))
1944                 w += sldns_str_print(str, str_len, " do");
1945         /* the extended rcode is the value set, shifted four bits,
1946          * and or'd with the original rcode */
1947         if(ext_rcode) {
1948                 int rc = ((int)ext_rcode)<<4;
1949                 if(pkt && pktlen >= LDNS_HEADER_SIZE)
1950                         rc |= LDNS_RCODE_WIRE(pkt);
1951                 w += sldns_str_print(str, str_len, " ; ext-rcode: %d", rc);
1952         }
1953         w += sldns_str_print(str, str_len, " ; udp: %u", (unsigned)udpsize);
1954
1955         if(rdatalen) {
1956                 if(*data_len < rdatalen) {
1957                         w += sldns_str_print(str, str_len,
1958                                 " ; Error EDNS rdata too short; ");
1959                         rdatalen = *data_len;
1960                 }
1961                 w += print_edns_opts(str, str_len, *data, rdatalen);
1962                 (*data) += rdatalen;
1963                 (*data_len) -= rdatalen;
1964         }
1965         w += sldns_str_print(str, str_len, "\n");
1966         return w;
1967 }