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 "sldns/wire2str.h" 19 #include "sldns/str2wire.h" 20 #include "sldns/rrdef.h" 21 #include "sldns/pkthdr.h" 22 #include "sldns/parseutil.h" 23 #include "sldns/sbuffer.h" 24 #include "sldns/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 } 1968