/* * wire2str.c * * conversion routines from the wire format * to the presentation format (strings) * * (c) NLnet Labs, 2004-2006 * * See the file LICENSE for the license */ /** * \file * * Contains functions to translate the wireformat to text * representation, as well as functions to print them. */ #include "config.h" #include "sldns/wire2str.h" #include "sldns/str2wire.h" #include "sldns/rrdef.h" #include "sldns/pkthdr.h" #include "sldns/parseutil.h" #include "sldns/sbuffer.h" #include "sldns/keyraw.h" #include "util/data/dname.h" #ifdef HAVE_TIME_H #include #endif #include #include #include #ifdef HAVE_NETDB_H #include #endif /* lookup tables for standard DNS stuff */ /* Taken from RFC 2535, section 7. */ static sldns_lookup_table sldns_algorithms_data[] = { { LDNS_RSAMD5, "RSAMD5" }, { LDNS_DH, "DH" }, { LDNS_DSA, "DSA" }, { LDNS_ECC, "ECC" }, { LDNS_RSASHA1, "RSASHA1" }, { LDNS_DSA_NSEC3, "DSA-NSEC3-SHA1" }, { LDNS_RSASHA1_NSEC3, "RSASHA1-NSEC3-SHA1" }, { LDNS_RSASHA256, "RSASHA256"}, { LDNS_RSASHA512, "RSASHA512"}, { LDNS_ECC_GOST, "ECC-GOST"}, { LDNS_ECDSAP256SHA256, "ECDSAP256SHA256"}, { LDNS_ECDSAP384SHA384, "ECDSAP384SHA384"}, { LDNS_ED25519, "ED25519"}, { LDNS_ED448, "ED448"}, { LDNS_INDIRECT, "INDIRECT" }, { LDNS_PRIVATEDNS, "PRIVATEDNS" }, { LDNS_PRIVATEOID, "PRIVATEOID" }, { 0, NULL } }; sldns_lookup_table* sldns_algorithms = sldns_algorithms_data; /* hash algorithms in DS record */ static sldns_lookup_table sldns_hashes_data[] = { { LDNS_SHA1, "SHA1" }, { LDNS_SHA256, "SHA256" }, { LDNS_HASH_GOST, "HASH-GOST" }, { LDNS_SHA384, "SHA384" }, { 0, NULL } }; sldns_lookup_table* sldns_hashes = sldns_hashes_data; /* Taken from RFC 4398 */ static sldns_lookup_table sldns_cert_algorithms_data[] = { { LDNS_CERT_PKIX, "PKIX" }, { LDNS_CERT_SPKI, "SPKI" }, { LDNS_CERT_PGP, "PGP" }, { LDNS_CERT_IPKIX, "IPKIX" }, { LDNS_CERT_ISPKI, "ISPKI" }, { LDNS_CERT_IPGP, "IPGP" }, { LDNS_CERT_ACPKIX, "ACPKIX" }, { LDNS_CERT_IACPKIX, "IACPKIX" }, { LDNS_CERT_URI, "URI" }, { LDNS_CERT_OID, "OID" }, { 0, NULL } }; sldns_lookup_table* sldns_cert_algorithms = sldns_cert_algorithms_data; /* if these are used elsewhere */ static sldns_lookup_table sldns_rcodes_data[] = { { LDNS_RCODE_NOERROR, "NOERROR" }, { LDNS_RCODE_FORMERR, "FORMERR" }, { LDNS_RCODE_SERVFAIL, "SERVFAIL" }, { LDNS_RCODE_NXDOMAIN, "NXDOMAIN" }, { LDNS_RCODE_NOTIMPL, "NOTIMPL" }, { LDNS_RCODE_REFUSED, "REFUSED" }, { LDNS_RCODE_YXDOMAIN, "YXDOMAIN" }, { LDNS_RCODE_YXRRSET, "YXRRSET" }, { LDNS_RCODE_NXRRSET, "NXRRSET" }, { LDNS_RCODE_NOTAUTH, "NOTAUTH" }, { LDNS_RCODE_NOTZONE, "NOTZONE" }, { 0, NULL } }; sldns_lookup_table* sldns_rcodes = sldns_rcodes_data; static sldns_lookup_table sldns_opcodes_data[] = { { LDNS_PACKET_QUERY, "QUERY" }, { LDNS_PACKET_IQUERY, "IQUERY" }, { LDNS_PACKET_STATUS, "STATUS" }, { LDNS_PACKET_NOTIFY, "NOTIFY" }, { LDNS_PACKET_UPDATE, "UPDATE" }, { 0, NULL } }; sldns_lookup_table* sldns_opcodes = sldns_opcodes_data; static sldns_lookup_table sldns_wireparse_errors_data[] = { { LDNS_WIREPARSE_ERR_OK, "no parse error" }, { LDNS_WIREPARSE_ERR_GENERAL, "parse error" }, { LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, "Domainname length overflow" }, { LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW, "Domainname length underflow (zero length)" }, { LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, "buffer too small" }, { LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, "Label length overflow" }, { LDNS_WIREPARSE_ERR_EMPTY_LABEL, "Empty label" }, { LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE, "Syntax error, bad escape sequence" }, { LDNS_WIREPARSE_ERR_SYNTAX, "Syntax error, could not parse the RR" }, { LDNS_WIREPARSE_ERR_SYNTAX_TTL, "Syntax error, could not parse the RR's TTL" }, { LDNS_WIREPARSE_ERR_SYNTAX_TYPE, "Syntax error, could not parse the RR's type" }, { LDNS_WIREPARSE_ERR_SYNTAX_CLASS, "Syntax error, could not parse the RR's class" }, { LDNS_WIREPARSE_ERR_SYNTAX_RDATA, "Syntax error, could not parse the RR's rdata" }, { LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE, "Syntax error, value expected" }, { LDNS_WIREPARSE_ERR_INVALID_STR, "Conversion error, string expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_B64, "Conversion error, b64 encoding expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT, "Conversion error, b32 ext encoding expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_HEX, "Conversion error, hex encoding expected" }, { LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM, "Bad algorithm type for CERT record" }, { LDNS_WIREPARSE_ERR_SYNTAX_TIME, "Conversion error, time encoding expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_PERIOD, "Conversion error, time period encoding expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_ILNP64, "Conversion error, 4 colon separated hex numbers expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_EUI48, "Conversion error, 6 two character hex numbers " "separated by dashes expected (i.e. xx-xx-xx-xx-xx-xx" }, { LDNS_WIREPARSE_ERR_SYNTAX_EUI64, "Conversion error, 8 two character hex numbers " "separated by dashes expected (i.e. xx-xx-xx-xx-xx-xx-xx-xx" }, { LDNS_WIREPARSE_ERR_SYNTAX_TAG, "Conversion error, a non-zero sequence of US-ASCII letters " "and numbers in lower case expected" }, { LDNS_WIREPARSE_ERR_NOT_IMPL, "not implemented" }, { LDNS_WIREPARSE_ERR_SYNTAX_INT, "Conversion error, integer expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_IP4, "Conversion error, ip4 addr expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_IP6, "Conversion error, ip6 addr expected" }, { LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW, "Syntax error, integer overflow" }, { LDNS_WIREPARSE_ERR_INCLUDE, "$INCLUDE directive was seen in the zone" }, { LDNS_WIREPARSE_ERR_PARENTHESIS, "Parse error, parenthesis mismatch" }, { LDNS_WIREPARSE_ERR_SVCB_UNKNOWN_KEY, "Unknown SvcParamKey"}, { LDNS_WIREPARSE_ERR_SVCB_MISSING_PARAM, "SvcParam is missing a SvcParamValue"}, { LDNS_WIREPARSE_ERR_SVCB_DUPLICATE_KEYS, "Duplicate SVCB key found"}, { LDNS_WIREPARSE_ERR_SVCB_MANDATORY_TOO_MANY_KEYS, "Too many keys in mandatory" }, { LDNS_WIREPARSE_ERR_SVCB_TOO_MANY_PARAMS, "Too many SvcParams. Unbound only allows 63 entries" }, { LDNS_WIREPARSE_ERR_SVCB_MANDATORY_MISSING_PARAM, "Mandatory SvcParamKey is missing"}, { LDNS_WIREPARSE_ERR_SVCB_MANDATORY_DUPLICATE_KEY, "Keys in SvcParam mandatory MUST be unique" }, { LDNS_WIREPARSE_ERR_SVCB_MANDATORY_IN_MANDATORY, "mandatory MUST not be included as mandatory parameter" }, { LDNS_WIREPARSE_ERR_SVCB_PORT_VALUE_SYNTAX, "Could not parse port SvcParamValue" }, { LDNS_WIREPARSE_ERR_SVCB_IPV4_TOO_MANY_ADDRESSES, "Too many IPv4 addresses in ipv4hint" }, { LDNS_WIREPARSE_ERR_SVCB_IPV6_TOO_MANY_ADDRESSES, "Too many IPv6 addresses in ipv6hint" }, { LDNS_WIREPARSE_ERR_SVCB_ALPN_KEY_TOO_LARGE, "Alpn strings need to be smaller than 255 chars"}, { LDNS_WIREPARSE_ERR_SVCB_NO_DEFAULT_ALPN_VALUE, "No-default-alpn should not have a value" }, { LDNS_WIREPARSE_ERR_SVCPARAM_BROKEN_RDATA, "General SVCParam error" }, { 0, NULL } }; sldns_lookup_table* sldns_wireparse_errors = sldns_wireparse_errors_data; static sldns_lookup_table sldns_edns_flags_data[] = { { 3600, "do"}, { 0, NULL} }; sldns_lookup_table* sldns_edns_flags = sldns_edns_flags_data; static sldns_lookup_table sldns_edns_options_data[] = { { 1, "LLQ" }, { 2, "UL" }, { 3, "NSID" }, /* 4 draft-cheshire-edns0-owner-option */ { 5, "DAU" }, { 6, "DHU" }, { 7, "N3U" }, { 8, "edns-client-subnet" }, { 11, "edns-tcp-keepalive"}, { 12, "Padding" }, { 15, "EDE"}, { 0, NULL} }; sldns_lookup_table* sldns_edns_options = sldns_edns_options_data; static sldns_lookup_table sldns_tsig_errors_data[] = { { LDNS_TSIG_ERROR_NOERROR, "NOERROR" }, { LDNS_RCODE_FORMERR, "FORMERR" }, { LDNS_RCODE_SERVFAIL, "SERVFAIL" }, { LDNS_RCODE_NXDOMAIN, "NXDOMAIN" }, { LDNS_RCODE_NOTIMPL, "NOTIMPL" }, { LDNS_RCODE_REFUSED, "REFUSED" }, { LDNS_RCODE_YXDOMAIN, "YXDOMAIN" }, { LDNS_RCODE_YXRRSET, "YXRRSET" }, { LDNS_RCODE_NXRRSET, "NXRRSET" }, { LDNS_RCODE_NOTAUTH, "NOTAUTH" }, { LDNS_RCODE_NOTZONE, "NOTZONE" }, { LDNS_TSIG_ERROR_BADSIG, "BADSIG" }, { LDNS_TSIG_ERROR_BADKEY, "BADKEY" }, { LDNS_TSIG_ERROR_BADTIME, "BADTIME" }, { LDNS_TSIG_ERROR_BADMODE, "BADMODE" }, { LDNS_TSIG_ERROR_BADNAME, "BADNAME" }, { LDNS_TSIG_ERROR_BADALG, "BADALG" }, { 0, NULL } }; sldns_lookup_table* sldns_tsig_errors = sldns_tsig_errors_data; /* draft-ietf-dnsop-svcb-https-06: 6. Initial SvcParamKeys */ const char *svcparamkey_strs[] = { "mandatory", "alpn", "no-default-alpn", "port", "ipv4hint", "ech", "ipv6hint", "dohpath" }; char* sldns_wire2str_pkt(uint8_t* data, size_t len) { size_t slen = (size_t)sldns_wire2str_pkt_buf(data, len, NULL, 0); char* result = (char*)malloc(slen+1); if(!result) return NULL; sldns_wire2str_pkt_buf(data, len, result, slen+1); return result; } char* sldns_wire2str_rr(uint8_t* rr, size_t len) { size_t slen = (size_t)sldns_wire2str_rr_buf(rr, len, NULL, 0); char* result = (char*)malloc(slen+1); if(!result) return NULL; sldns_wire2str_rr_buf(rr, len, result, slen+1); return result; } char* sldns_wire2str_type(uint16_t rrtype) { char buf[16]; sldns_wire2str_type_buf(rrtype, buf, sizeof(buf)); return strdup(buf); } char* sldns_wire2str_class(uint16_t rrclass) { char buf[16]; sldns_wire2str_class_buf(rrclass, buf, sizeof(buf)); return strdup(buf); } char* sldns_wire2str_dname(uint8_t* dname, size_t dname_len) { size_t slen=(size_t)sldns_wire2str_dname_buf(dname, dname_len, NULL, 0); char* result = (char*)malloc(slen+1); if(!result) return NULL; sldns_wire2str_dname_buf(dname, dname_len, result, slen+1); return result; } char* sldns_wire2str_rcode(int rcode) { char buf[16]; sldns_wire2str_rcode_buf(rcode, buf, sizeof(buf)); return strdup(buf); } int sldns_wire2str_pkt_buf(uint8_t* d, size_t dlen, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_pkt_scan(&d, &dlen, &s, &slen); } int sldns_wire2str_rr_buf(uint8_t* d, size_t dlen, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_rr_scan(&d, &dlen, &s, &slen, NULL, 0, NULL); } int sldns_wire2str_rrquestion_buf(uint8_t* d, size_t dlen, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_rrquestion_scan(&d, &dlen, &s, &slen, NULL, 0, NULL); } int sldns_wire2str_rdata_buf(uint8_t* rdata, size_t rdata_len, char* str, size_t str_len, uint16_t rrtype) { /* use arguments as temporary variables */ return sldns_wire2str_rdata_scan(&rdata, &rdata_len, &str, &str_len, rrtype, NULL, 0, NULL); } int sldns_wire2str_rr_unknown_buf(uint8_t* d, size_t dlen, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_rr_unknown_scan(&d, &dlen, &s, &slen, NULL, 0, NULL); } int sldns_wire2str_rr_comment_buf(uint8_t* rr, size_t rrlen, size_t dname_len, char* s, size_t slen) { uint16_t rrtype = sldns_wirerr_get_type(rr, rrlen, dname_len); return sldns_wire2str_rr_comment_print(&s, &slen, rr, rrlen, dname_len, rrtype); } int sldns_wire2str_type_buf(uint16_t rrtype, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_type_print(&s, &slen, rrtype); } int sldns_wire2str_class_buf(uint16_t rrclass, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_class_print(&s, &slen, rrclass); } int sldns_wire2str_rcode_buf(int rcode, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_rcode_print(&s, &slen, rcode); } int sldns_wire2str_opcode_buf(int opcode, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_opcode_print(&s, &slen, opcode); } int sldns_wire2str_dname_buf(uint8_t* d, size_t dlen, char* s, size_t slen) { /* use arguments as temporary variables */ return sldns_wire2str_dname_scan(&d, &dlen, &s, &slen, NULL, 0, NULL); } int sldns_str_vprint(char** str, size_t* slen, const char* format, va_list args) { int w = vsnprintf(*str, *slen, format, args); if(w < 0) { /* error in printout */ return 0; } else if((size_t)w >= *slen) { *str = NULL; /* we do not want str to point outside of buffer*/ *slen = 0; } else { *str += w; *slen -= w; } return w; } int sldns_str_print(char** str, size_t* slen, const char* format, ...) { int w; va_list args; va_start(args, format); w = sldns_str_vprint(str, slen, format, args); va_end(args); return w; } /** print hex format into text buffer for specified length */ static int print_hex_buf(char** s, size_t* slen, uint8_t* buf, size_t len) { const char* hex = "0123456789ABCDEF"; size_t i; for(i=0; i>4], hex[buf[i]&0x0f]); } return (int)len*2; } /** print remainder of buffer in hex format with prefixed text */ static int print_remainder_hex(const char* pref, uint8_t** d, size_t* dlen, char** s, size_t* slen) { int w = 0; w += sldns_str_print(s, slen, "%s", pref); w += print_hex_buf(s, slen, *d, *dlen); *d += *dlen; *dlen = 0; return w; } int sldns_wire2str_pkt_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { int w = 0, comprloop = 0; unsigned qdcount, ancount, nscount, arcount, i; uint8_t* pkt = *d; size_t pktlen = *dlen; if(*dlen >= LDNS_HEADER_SIZE) { qdcount = (unsigned)LDNS_QDCOUNT(*d); ancount = (unsigned)LDNS_ANCOUNT(*d); nscount = (unsigned)LDNS_NSCOUNT(*d); arcount = (unsigned)LDNS_ARCOUNT(*d); } else { qdcount = ancount = nscount = arcount = 0; } w += sldns_wire2str_header_scan(d, dlen, s, slen); w += sldns_str_print(s, slen, "\n"); w += sldns_str_print(s, slen, ";; QUESTION SECTION:\n"); for(i=0; i 0) { w += print_remainder_hex(";; trailing garbage 0x", d, dlen, s, slen); w += sldns_str_print(s, slen, "\n"); } return w; } /** scan type, class and ttl and printout, for rr */ static int sldns_rr_tcttl_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w = 0; uint16_t t, c; uint32_t ttl; if(*dl < 8) { if(*dl < 4) return w + print_remainder_hex("; Error malformed 0x", d, dl, s, sl); /* these print values or 0x.. if none left */ t = sldns_read_uint16(*d); c = sldns_read_uint16((*d)+2); (*d)+=4; (*dl)-=4; w += sldns_wire2str_class_print(s, sl, c); w += sldns_str_print(s, sl, "\t"); w += sldns_wire2str_type_print(s, sl, t); if(*dl == 0) return w + sldns_str_print(s, sl, "; Error no ttl"); return w + print_remainder_hex( "; Error malformed ttl 0x", d, dl, s, sl); } t = sldns_read_uint16(*d); c = sldns_read_uint16((*d)+2); ttl = sldns_read_uint32((*d)+4); (*d)+=8; (*dl)-=8; w += sldns_str_print(s, sl, "%lu\t", (unsigned long)ttl); w += sldns_wire2str_class_print(s, sl, c); w += sldns_str_print(s, sl, "\t"); w += sldns_wire2str_type_print(s, sl, t); return w; } int sldns_wire2str_rr_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen, uint8_t* pkt, size_t pktlen, int* comprloop) { int w = 0; uint8_t* rr = *d; size_t rrlen = *dlen, dname_off, rdlen, ordlen; uint16_t rrtype = 0; if(*dlen >= 3 && (*d)[0]==0 && sldns_read_uint16((*d)+1)==LDNS_RR_TYPE_OPT) { /* perform EDNS OPT processing */ return sldns_wire2str_edns_scan(d, dlen, s, slen, pkt, pktlen); } /* try to scan the rdata with pretty-printing, but if that fails, then * scan the rdata as an unknown RR type */ w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen, comprloop); w += sldns_str_print(s, slen, "\t"); dname_off = rrlen-(*dlen); if(*dlen == 4) { /* like a question-RR */ uint16_t t = sldns_read_uint16(*d); uint16_t c = sldns_read_uint16((*d)+2); (*d)+=4; (*dlen)-=4; w += sldns_wire2str_class_print(s, slen, c); w += sldns_str_print(s, slen, "\t"); w += sldns_wire2str_type_print(s, slen, t); w += sldns_str_print(s, slen, " ; Error no ttl,rdata\n"); return w; } if(*dlen < 8) { if(*dlen == 0) return w + sldns_str_print(s, slen, ";Error missing RR\n"); w += print_remainder_hex(";Error partial RR 0x", d, dlen, s, slen); return w + sldns_str_print(s, slen, "\n"); } rrtype = sldns_read_uint16(*d); w += sldns_rr_tcttl_scan(d, dlen, s, slen); w += sldns_str_print(s, slen, "\t"); /* rdata */ if(*dlen < 2) { if(*dlen == 0) return w + sldns_str_print(s, slen, ";Error missing rdatalen\n"); w += print_remainder_hex(";Error missing rdatalen 0x", d, dlen, s, slen); return w + sldns_str_print(s, slen, "\n"); } rdlen = sldns_read_uint16(*d); ordlen = rdlen; (*d)+=2; (*dlen)-=2; if(*dlen < rdlen) { w += sldns_str_print(s, slen, "\\# %u ", (unsigned)rdlen); if(*dlen == 0) return w + sldns_str_print(s, slen, ";Error missing rdata\n"); w += print_remainder_hex(";Error partial rdata 0x", d, dlen, s, slen); return w + sldns_str_print(s, slen, "\n"); } w += sldns_wire2str_rdata_scan(d, &rdlen, s, slen, rrtype, pkt, pktlen, comprloop); (*dlen) -= (ordlen-rdlen); /* default comment */ w += sldns_wire2str_rr_comment_print(s, slen, rr, rrlen, dname_off, rrtype); w += sldns_str_print(s, slen, "\n"); return w; } int sldns_wire2str_rrquestion_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen, uint8_t* pkt, size_t pktlen, int* comprloop) { int w = 0; uint16_t t, c; w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen, comprloop); w += sldns_str_print(s, slen, "\t"); if(*dlen < 4) { if(*dlen == 0) return w + sldns_str_print(s, slen, "Error malformed\n"); w += print_remainder_hex("Error malformed 0x", d, dlen, s, slen); return w + sldns_str_print(s, slen, "\n"); } t = sldns_read_uint16(*d); c = sldns_read_uint16((*d)+2); (*d)+=4; (*dlen)-=4; w += sldns_wire2str_class_print(s, slen, c); w += sldns_str_print(s, slen, "\t"); w += sldns_wire2str_type_print(s, slen, t); w += sldns_str_print(s, slen, "\n"); return w; } int sldns_wire2str_rr_unknown_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen, uint8_t* pkt, size_t pktlen, int* comprloop) { size_t rdlen, ordlen; int w = 0; w += sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen, comprloop); w += sldns_str_print(s, slen, "\t"); w += sldns_rr_tcttl_scan(d, dlen, s, slen); w += sldns_str_print(s, slen, "\t"); if(*dlen < 2) { if(*dlen == 0) return w + sldns_str_print(s, slen, ";Error missing rdatalen\n"); w += print_remainder_hex(";Error missing rdatalen 0x", d, dlen, s, slen); return w + sldns_str_print(s, slen, "\n"); } rdlen = sldns_read_uint16(*d); ordlen = rdlen; (*d) += 2; (*dlen) -= 2; if(*dlen < rdlen) { w += sldns_str_print(s, slen, "\\# %u ", (unsigned)rdlen); if(*dlen == 0) return w + sldns_str_print(s, slen, ";Error missing rdata\n"); w += print_remainder_hex(";Error partial rdata 0x", d, dlen, s, slen); return w + sldns_str_print(s, slen, "\n"); } w += sldns_wire2str_rdata_unknown_scan(d, &rdlen, s, slen); (*dlen) -= (ordlen-rdlen); w += sldns_str_print(s, slen, "\n"); return w; } /** print rr comment for type DNSKEY */ static int rr_comment_dnskey(char** s, size_t* slen, uint8_t* rr, size_t rrlen, size_t dname_off) { size_t rdlen; uint8_t* rdata; int flags, w = 0; if(rrlen < dname_off + 10) return 0; rdlen = sldns_read_uint16(rr+dname_off+8); if(rrlen < dname_off + 10 + rdlen) return 0; if(rdlen < 2) return 0; rdata = rr + dname_off + 10; flags = (int)sldns_read_uint16(rdata); w += sldns_str_print(s, slen, " ;{"); /* id */ w += sldns_str_print(s, slen, "id = %u", sldns_calc_keytag_raw(rdata, rdlen)); /* flags */ if((flags&LDNS_KEY_ZONE_KEY)) { if((flags&LDNS_KEY_SEP_KEY)) w += sldns_str_print(s, slen, " (ksk)"); else w += sldns_str_print(s, slen, " (zsk)"); } /* keysize */ if(rdlen > 4) { w += sldns_str_print(s, slen, ", "); w += sldns_str_print(s, slen, "size = %db", (int)sldns_rr_dnskey_key_size_raw( (unsigned char*)rdata+4, rdlen-4, (int)(rdata[3]))); } w += sldns_str_print(s, slen, "}"); return w; } /** print rr comment for type RRSIG */ static int rr_comment_rrsig(char** s, size_t* slen, uint8_t* rr, size_t rrlen, size_t dname_off) { size_t rdlen; uint8_t* rdata; if(rrlen < dname_off + 10) return 0; rdlen = sldns_read_uint16(rr+dname_off+8); if(rrlen < dname_off + 10 + rdlen) return 0; rdata = rr + dname_off + 10; if(rdlen < 18) return 0; return sldns_str_print(s, slen, " ;{id = %d}", (int)sldns_read_uint16(rdata+16)); } /** print rr comment for type NSEC3 */ static int rr_comment_nsec3(char** s, size_t* slen, uint8_t* rr, size_t rrlen, size_t dname_off) { size_t rdlen; uint8_t* rdata; int w = 0; if(rrlen < dname_off + 10) return 0; rdlen = sldns_read_uint16(rr+dname_off+8); if(rrlen < dname_off + 10 + rdlen) return 0; rdata = rr + dname_off + 10; if(rdlen < 2) return 0; if((rdata[1] & LDNS_NSEC3_VARS_OPTOUT_MASK)) w += sldns_str_print(s, slen, " ;{flags: optout}"); return w; } int sldns_wire2str_rr_comment_print(char** s, size_t* slen, uint8_t* rr, size_t rrlen, size_t dname_off, uint16_t rrtype) { if(rrtype == LDNS_RR_TYPE_DNSKEY) { return rr_comment_dnskey(s, slen, rr, rrlen, dname_off); } else if(rrtype == LDNS_RR_TYPE_RRSIG) { return rr_comment_rrsig(s, slen, rr, rrlen, dname_off); } else if(rrtype == LDNS_RR_TYPE_NSEC3) { return rr_comment_nsec3(s, slen, rr, rrlen, dname_off); } return 0; } int sldns_wire2str_header_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { int w = 0; int opcode, rcode; w += sldns_str_print(s, slen, ";; ->>HEADER<<- "); if(*dlen == 0) return w+sldns_str_print(s, slen, "Error empty packet"); if(*dlen < 4) return w+print_remainder_hex("Error header too short 0x", d, dlen, s, slen); opcode = (int)LDNS_OPCODE_WIRE(*d); rcode = (int)LDNS_RCODE_WIRE(*d); w += sldns_str_print(s, slen, "opcode: "); w += sldns_wire2str_opcode_print(s, slen, opcode); w += sldns_str_print(s, slen, ", "); w += sldns_str_print(s, slen, "rcode: "); w += sldns_wire2str_rcode_print(s, slen, rcode); w += sldns_str_print(s, slen, ", "); w += sldns_str_print(s, slen, "id: %d\n", (int)LDNS_ID_WIRE(*d)); w += sldns_str_print(s, slen, ";; flags:"); if(LDNS_QR_WIRE(*d)) w += sldns_str_print(s, slen, " qr"); if(LDNS_AA_WIRE(*d)) w += sldns_str_print(s, slen, " aa"); if(LDNS_TC_WIRE(*d)) w += sldns_str_print(s, slen, " tc"); if(LDNS_RD_WIRE(*d)) w += sldns_str_print(s, slen, " rd"); if(LDNS_CD_WIRE(*d)) w += sldns_str_print(s, slen, " cd"); if(LDNS_RA_WIRE(*d)) w += sldns_str_print(s, slen, " ra"); if(LDNS_AD_WIRE(*d)) w += sldns_str_print(s, slen, " ad"); if(LDNS_Z_WIRE(*d)) w += sldns_str_print(s, slen, " z"); w += sldns_str_print(s, slen, " ; "); if(*dlen < LDNS_HEADER_SIZE) return w+print_remainder_hex("Error header too short 0x", d, dlen, s, slen); w += sldns_str_print(s, slen, "QUERY: %d, ", (int)LDNS_QDCOUNT(*d)); w += sldns_str_print(s, slen, "ANSWER: %d, ", (int)LDNS_ANCOUNT(*d)); w += sldns_str_print(s, slen, "AUTHORITY: %d, ", (int)LDNS_NSCOUNT(*d)); w += sldns_str_print(s, slen, "ADDITIONAL: %d ", (int)LDNS_ARCOUNT(*d)); *d += LDNS_HEADER_SIZE; *dlen -= LDNS_HEADER_SIZE; return w; } int sldns_wire2str_rdata_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen, uint16_t rrtype, uint8_t* pkt, size_t pktlen, int* comprloop) { /* try to prettyprint, but if that fails, use unknown format */ uint8_t* origd = *d; char* origs = *s; size_t origdlen = *dlen, origslen = *slen; size_t r_cnt, r_max; sldns_rdf_type rdftype; int w = 0, n; const sldns_rr_descriptor *desc = sldns_rr_descript(rrtype); if(!desc) /* unknown format */ return sldns_wire2str_rdata_unknown_scan(d, dlen, s, slen); /* dlen equals the rdatalen for the rdata */ r_max = sldns_rr_descriptor_maximum(desc); for(r_cnt=0; r_cnt < r_max; r_cnt++) { if(*dlen == 0) { if(r_cnt < sldns_rr_descriptor_minimum(desc)) goto failed; break; /* nothing more to print */ } rdftype = sldns_rr_descriptor_field_type(desc, r_cnt); if(r_cnt != 0) w += sldns_str_print(s, slen, " "); n = sldns_wire2str_rdf_scan(d, dlen, s, slen, rdftype, pkt, pktlen, comprloop); if(n == -1) { failed: /* failed, use unknown format */ *d = origd; *s = origs; *dlen = origdlen; *slen = origslen; return sldns_wire2str_rdata_unknown_scan(d, dlen, s, slen); } w += n; } if(*dlen != 0) { goto failed; } return w; } int sldns_wire2str_rdata_unknown_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { int w = 0; /* print length */ w += sldns_str_print(s, slen, "\\# %u", (unsigned)*dlen); /* print rdlen in hex */ if(*dlen != 0) w += sldns_str_print(s, slen, " "); w += print_hex_buf(s, slen, *d, *dlen); (*d) += *dlen; (*dlen) = 0; return w; } /** print and escape one character for a domain dname */ static int dname_char_print(char** s, size_t* slen, uint8_t c) { if(c == '.' || c == ';' || c == '(' || c == ')' || c == '\\') return sldns_str_print(s, slen, "\\%c", c); else if(!(isascii((unsigned char)c) && isgraph((unsigned char)c))) return sldns_str_print(s, slen, "\\%03u", (unsigned)c); /* plain printout */ if(*slen) { **s = (char)c; (*s)++; (*slen)--; } return 1; } int sldns_wire2str_dname_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen, uint8_t* pkt, size_t pktlen, int* comprloop) { int w = 0; /* spool labels onto the string, use compression if its there */ uint8_t* pos = *d; unsigned i, counter=0; unsigned maxcompr = MAX_COMPRESS_PTRS; /* loop detection, max compr ptrs */ int in_buf = 1; size_t dname_len = 0; if(comprloop) { if(*comprloop != 0) maxcompr = 30; /* for like ipv6 reverse name, per label */ if(*comprloop > 4) maxcompr = 4; /* just don't want to spend time, any more */ } if(*dlen == 0) return sldns_str_print(s, slen, "ErrorMissingDname"); if(*pos == 0) { (*d)++; (*dlen)--; return sldns_str_print(s, slen, "."); } while((!pkt || pos < pkt+pktlen) && *pos) { /* read label length */ uint8_t labellen = *pos++; if(in_buf) { (*d)++; (*dlen)--; } /* find out what sort of label we have */ if((labellen&0xc0) == 0xc0) { /* compressed */ uint16_t target = 0; if(in_buf && *dlen == 0) return w + sldns_str_print(s, slen, "ErrorPartialDname"); else if(!in_buf && pos+1 > pkt+pktlen) return w + sldns_str_print(s, slen, "ErrorPartialDname"); target = ((labellen&0x3f)<<8) | *pos; if(in_buf) { (*d)++; (*dlen)--; } /* move to target, if possible */ if(!pkt || target >= pktlen) return w + sldns_str_print(s, slen, "ErrorComprPtrOutOfBounds"); if(counter++ > maxcompr) { if(comprloop && *comprloop < 10) (*comprloop)++; return w + sldns_str_print(s, slen, "ErrorComprPtrLooped"); } in_buf = 0; pos = pkt+target; continue; } else if((labellen&0xc0)) { /* notimpl label type */ w += sldns_str_print(s, slen, "ErrorLABELTYPE%xIsUnknown", (int)(labellen&0xc0)); return w; } /* spool label characters, end with '.' */ if(in_buf && *dlen < (size_t)labellen) labellen = (uint8_t)*dlen; else if(!in_buf && pos+(size_t)labellen > pkt+pktlen) labellen = (uint8_t)(pkt + pktlen - pos); dname_len += ((size_t)labellen)+1; if(dname_len > LDNS_MAX_DOMAINLEN) { /* dname_len counts the uncompressed length we have * seen so far, and the domain name has become too * long, prevent the loop from printing overly long * content. */ w += sldns_str_print(s, slen, "ErrorDomainNameTooLong"); return w; } for(i=0; i<(unsigned)labellen; i++) { w += dname_char_print(s, slen, *pos++); } if(in_buf) { (*d) += labellen; (*dlen) -= labellen; if(*dlen == 0) break; } w += sldns_str_print(s, slen, "."); } /* skip over final root label */ if(in_buf && *dlen > 0) { (*d)++; (*dlen)--; } /* in case we printed no labels, terminate dname */ if(w == 0) w += sldns_str_print(s, slen, "."); return w; } int sldns_wire2str_opcode_print(char** s, size_t* slen, int opcode) { sldns_lookup_table *lt = sldns_lookup_by_id(sldns_opcodes, opcode); if (lt && lt->name) { return sldns_str_print(s, slen, "%s", lt->name); } return sldns_str_print(s, slen, "OPCODE%u", (unsigned)opcode); } int sldns_wire2str_rcode_print(char** s, size_t* slen, int rcode) { sldns_lookup_table *lt = sldns_lookup_by_id(sldns_rcodes, rcode); if (lt && lt->name) { return sldns_str_print(s, slen, "%s", lt->name); } return sldns_str_print(s, slen, "RCODE%u", (unsigned)rcode); } int sldns_wire2str_class_print(char** s, size_t* slen, uint16_t rrclass) { sldns_lookup_table *lt = sldns_lookup_by_id(sldns_rr_classes, (int)rrclass); if (lt && lt->name) { return sldns_str_print(s, slen, "%s", lt->name); } return sldns_str_print(s, slen, "CLASS%u", (unsigned)rrclass); } int sldns_wire2str_type_print(char** s, size_t* slen, uint16_t rrtype) { const sldns_rr_descriptor *descriptor = sldns_rr_descript(rrtype); if (descriptor && descriptor->_name) { return sldns_str_print(s, slen, "%s", descriptor->_name); } return sldns_str_print(s, slen, "TYPE%u", (unsigned)rrtype); } int sldns_wire2str_edns_option_code_print(char** s, size_t* slen, uint16_t opcode) { sldns_lookup_table *lt = sldns_lookup_by_id(sldns_edns_options, (int)opcode); if (lt && lt->name) { return sldns_str_print(s, slen, "%s", lt->name); } return sldns_str_print(s, slen, "OPT%u", (unsigned)opcode); } int sldns_wire2str_class_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { uint16_t c; if(*dlen == 0) return 0; if(*dlen < 2) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen); c = sldns_read_uint16(*d); (*d)+=2; (*dlen)-=2; return sldns_wire2str_class_print(s, slen, c); } int sldns_wire2str_type_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { uint16_t t; if(*dlen == 0) return 0; if(*dlen < 2) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen); t = sldns_read_uint16(*d); (*d)+=2; (*dlen)-=2; return sldns_wire2str_type_print(s, slen, t); } int sldns_wire2str_ttl_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { uint32_t ttl; if(*dlen == 0) return 0; if(*dlen < 4) return print_remainder_hex("Error malformed 0x", d, dlen, s, slen); ttl = sldns_read_uint32(*d); (*d)+=4; (*dlen)-=4; return sldns_str_print(s, slen, "%u", (unsigned)ttl); } static int sldns_print_svcparamkey(char** s, size_t* slen, uint16_t svcparamkey) { if (svcparamkey < SVCPARAMKEY_COUNT) { return sldns_str_print(s, slen, "%s", svcparamkey_strs[svcparamkey]); } else { return sldns_str_print(s, slen, "key%d", (int)svcparamkey); } } static int sldns_wire2str_svcparam_port2str(char** s, size_t* slen, uint16_t data_len, uint8_t* data) { int w = 0; if (data_len != 2) return -1; /* wireformat error, a short is 2 bytes */ w = sldns_str_print(s, slen, "=%d", (int)sldns_read_uint16(data)); return w; } static int sldns_wire2str_svcparam_ipv4hint2str(char** s, size_t* slen, uint16_t data_len, uint8_t* data) { char ip_str[INET_ADDRSTRLEN + 1]; int w = 0; assert(data_len > 0); if ((data_len % LDNS_IP4ADDRLEN) == 0) { if (inet_ntop(AF_INET, data, ip_str, sizeof(ip_str)) == NULL) return -1; /* wireformat error, incorrect size or inet family */ w += sldns_str_print(s, slen, "=%s", ip_str); data += LDNS_IP4ADDRLEN; while ((data_len -= LDNS_IP4ADDRLEN) > 0) { if (inet_ntop(AF_INET, data, ip_str, sizeof(ip_str)) == NULL) return -1; /* wireformat error, incorrect size or inet family */ w += sldns_str_print(s, slen, ",%s", ip_str); data += LDNS_IP4ADDRLEN; } } else return -1; return w; } static int sldns_wire2str_svcparam_ipv6hint2str(char** s, size_t* slen, uint16_t data_len, uint8_t* data) { char ip_str[INET6_ADDRSTRLEN + 1]; int w = 0; assert(data_len > 0); if ((data_len % LDNS_IP6ADDRLEN) == 0) { if (inet_ntop(AF_INET6, data, ip_str, sizeof(ip_str)) == NULL) return -1; /* wireformat error, incorrect size or inet family */ w += sldns_str_print(s, slen, "=%s", ip_str); data += LDNS_IP6ADDRLEN; while ((data_len -= LDNS_IP6ADDRLEN) > 0) { if (inet_ntop(AF_INET6, data, ip_str, sizeof(ip_str)) == NULL) return -1; /* wireformat error, incorrect size or inet family */ w += sldns_str_print(s, slen, ",%s", ip_str); data += LDNS_IP6ADDRLEN; } } else return -1; return w; } static int sldns_wire2str_svcparam_mandatory2str(char** s, size_t* slen, uint16_t data_len, uint8_t* data) { int w = 0; assert(data_len > 0); if (data_len % sizeof(uint16_t)) return -1; /* wireformat error, data_len must be multiple of shorts */ w += sldns_str_print(s, slen, "="); w += sldns_print_svcparamkey(s, slen, sldns_read_uint16(data)); data += 2; while ((data_len -= sizeof(uint16_t))) { w += sldns_str_print(s, slen, ","); w += sldns_print_svcparamkey(s, slen, sldns_read_uint16(data)); data += 2; } return w; } static int sldns_wire2str_svcparam_alpn2str(char** s, size_t* slen, uint16_t data_len, uint8_t* data) { uint8_t *dp = (void *)data; int w = 0; assert(data_len > 0); /* Guaranteed by sldns_wire2str_svcparam_scan */ w += sldns_str_print(s, slen, "=\""); while (data_len) { /* alpn is list of length byte (str_len) followed by a string of that size */ uint8_t i, str_len = *dp++; if (str_len > --data_len) return -1; for (i = 0; i < str_len; i++) { if (dp[i] == '"' || dp[i] == '\\') w += sldns_str_print(s, slen, "\\\\\\%c", dp[i]); else if (dp[i] == ',') w += sldns_str_print(s, slen, "\\\\%c", dp[i]); else if (!isprint(dp[i])) w += sldns_str_print(s, slen, "\\%03u", (unsigned) dp[i]); else w += sldns_str_print(s, slen, "%c", dp[i]); } dp += str_len; if ((data_len -= str_len)) w += sldns_str_print(s, slen, "%s", ","); } w += sldns_str_print(s, slen, "\""); return w; } static int sldns_wire2str_svcparam_ech2str(char** s, size_t* slen, uint16_t data_len, uint8_t* data) { int size; int w = 0; assert(data_len > 0); /* Guaranteed by sldns_wire2str_svcparam_scan */ w += sldns_str_print(s, slen, "=\""); if ((size = sldns_b64_ntop(data, data_len, *s, *slen)) < 0) return -1; (*s) += size; (*slen) -= size; w += sldns_str_print(s, slen, "\""); return w + size; } int sldns_wire2str_svcparam_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen) { uint8_t ch; uint16_t svcparamkey, data_len; int written_chars = 0; int r, i; /* verify that we have enough data to read svcparamkey and data_len */ if(*dlen < 4) return -1; svcparamkey = sldns_read_uint16(*d); data_len = sldns_read_uint16(*d+2); *d += 4; *dlen -= 4; /* verify that we have data_len data */ if (data_len > *dlen) return -1; written_chars += sldns_print_svcparamkey(s, slen, svcparamkey); if (!data_len) { /* Some SvcParams MUST have values */ switch (svcparamkey) { case SVCB_KEY_ALPN: case SVCB_KEY_PORT: case SVCB_KEY_IPV4HINT: case SVCB_KEY_IPV6HINT: case SVCB_KEY_MANDATORY: case SVCB_KEY_DOHPATH: return -1; default: return written_chars; } } switch (svcparamkey) { case SVCB_KEY_PORT: r = sldns_wire2str_svcparam_port2str(s, slen, data_len, *d); break; case SVCB_KEY_IPV4HINT: r = sldns_wire2str_svcparam_ipv4hint2str(s, slen, data_len, *d); break; case SVCB_KEY_IPV6HINT: r = sldns_wire2str_svcparam_ipv6hint2str(s, slen, data_len, *d); break; case SVCB_KEY_MANDATORY: r = sldns_wire2str_svcparam_mandatory2str(s, slen, data_len, *d); break; case SVCB_KEY_NO_DEFAULT_ALPN: return -1; /* wireformat error, should not have a value */ case SVCB_KEY_ALPN: r = sldns_wire2str_svcparam_alpn2str(s, slen, data_len, *d); break; case SVCB_KEY_ECH: r = sldns_wire2str_svcparam_ech2str(s, slen, data_len, *d); break; case SVCB_KEY_DOHPATH: /* fallthrough */ default: r = sldns_str_print(s, slen, "=\""); for (i = 0; i < data_len; i++) { ch = (*d)[i]; if (ch == '"' || ch == '\\') r += sldns_str_print(s, slen, "\\%c", ch); else if (!isprint(ch)) r += sldns_str_print(s, slen, "\\%03u", (unsigned) ch); else r += sldns_str_print(s, slen, "%c", ch); } r += sldns_str_print(s, slen, "\""); break; } if (r <= 0) return -1; /* wireformat error */ written_chars += r; *d += data_len; *dlen -= data_len; return written_chars; } int sldns_wire2str_rdf_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen, int rdftype, uint8_t* pkt, size_t pktlen, int* comprloop) { if(*dlen == 0) return 0; switch(rdftype) { case LDNS_RDF_TYPE_NONE: return 0; case LDNS_RDF_TYPE_DNAME: return sldns_wire2str_dname_scan(d, dlen, s, slen, pkt, pktlen, comprloop); case LDNS_RDF_TYPE_INT8: return sldns_wire2str_int8_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_INT16: return sldns_wire2str_int16_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_INT32: return sldns_wire2str_int32_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_PERIOD: return sldns_wire2str_period_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_TSIGTIME: return sldns_wire2str_tsigtime_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_A: return sldns_wire2str_a_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_AAAA: return sldns_wire2str_aaaa_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_STR: return sldns_wire2str_str_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_APL: return sldns_wire2str_apl_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_B32_EXT: return sldns_wire2str_b32_ext_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_B64: return sldns_wire2str_b64_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_HEX: return sldns_wire2str_hex_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_NSEC: return sldns_wire2str_nsec_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_NSEC3_SALT: return sldns_wire2str_nsec3_salt_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_TYPE: return sldns_wire2str_type_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_CLASS: return sldns_wire2str_class_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_CERT_ALG: return sldns_wire2str_cert_alg_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_ALG: return sldns_wire2str_alg_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_UNKNOWN: return sldns_wire2str_unknown_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_TIME: return sldns_wire2str_time_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_LOC: return sldns_wire2str_loc_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_WKS: case LDNS_RDF_TYPE_SERVICE: return sldns_wire2str_wks_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_NSAP: return sldns_wire2str_nsap_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_ATMA: return sldns_wire2str_atma_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_IPSECKEY: return sldns_wire2str_ipseckey_scan(d, dlen, s, slen, pkt, pktlen, comprloop); case LDNS_RDF_TYPE_HIP: return sldns_wire2str_hip_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_INT16_DATA: return sldns_wire2str_int16_data_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER: return sldns_wire2str_b32_ext_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_ILNP64: return sldns_wire2str_ilnp64_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_EUI48: return sldns_wire2str_eui48_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_EUI64: return sldns_wire2str_eui64_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_TAG: return sldns_wire2str_tag_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_LONG_STR: return sldns_wire2str_long_str_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_SVCPARAM: return sldns_wire2str_svcparam_scan(d, dlen, s, slen); case LDNS_RDF_TYPE_TSIGERROR: return sldns_wire2str_tsigerror_scan(d, dlen, s, slen); } /* unknown rdf type */ return -1; } int sldns_wire2str_int8_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 1) return -1; w = sldns_str_print(s, sl, "%u", (unsigned)**d); (*d)++; (*dl)--; return w; } int sldns_wire2str_int16_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 2) return -1; w = sldns_str_print(s, sl, "%lu", (unsigned long)sldns_read_uint16(*d)); (*d)+=2; (*dl)-=2; return w; } int sldns_wire2str_int32_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 4) return -1; w = sldns_str_print(s, sl, "%lu", (unsigned long)sldns_read_uint32(*d)); (*d)+=4; (*dl)-=4; return w; } int sldns_wire2str_period_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 4) return -1; w = sldns_str_print(s, sl, "%u", (unsigned)sldns_read_uint32(*d)); (*d)+=4; (*dl)-=4; return w; } int sldns_wire2str_tsigtime_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { /* tsigtime is 48 bits network order unsigned integer */ int w; uint64_t tsigtime = 0; uint64_t d0, d1, d2, d3, d4, d5; if(*dl < 6) return -1; d0 = (*d)[0]; /* cast to uint64 for shift operations */ d1 = (*d)[1]; d2 = (*d)[2]; d3 = (*d)[3]; d4 = (*d)[4]; d5 = (*d)[5]; tsigtime = (d0<<40) | (d1<<32) | (d2<<24) | (d3<<16) | (d4<<8) | d5; #ifndef USE_WINSOCK w = sldns_str_print(s, sl, "%llu", (long long)tsigtime); #else w = sldns_str_print(s, sl, "%I64u", (long long)tsigtime); #endif (*d)+=6; (*dl)-=6; return w; } int sldns_wire2str_a_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { char buf[32]; int w; if(*dl < 4) return -1; if(!inet_ntop(AF_INET, *d, buf, (socklen_t)sizeof(buf))) return -1; w = sldns_str_print(s, sl, "%s", buf); (*d)+=4; (*dl)-=4; return w; } int sldns_wire2str_aaaa_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { #ifdef AF_INET6 char buf[64]; int w; if(*dl < 16) return -1; if(!inet_ntop(AF_INET6, *d, buf, (socklen_t)sizeof(buf))) return -1; w = sldns_str_print(s, sl, "%s", buf); (*d)+=16; (*dl)-=16; return w; #else return -1; #endif } /** printout escaped TYPE_STR character */ static int str_char_print(char** s, size_t* sl, uint8_t c) { if(isprint((unsigned char)c) || c == '\t') { if(c == '\"' || c == '\\') return sldns_str_print(s, sl, "\\%c", c); if(*sl) { **s = (char)c; (*s)++; (*sl)--; } return 1; } return sldns_str_print(s, sl, "\\%03u", (unsigned)c); } int sldns_wire2str_str_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w = 0; size_t i, len; if(*dl < 1) return -1; len = **d; if(*dl < 1+len) return -1; (*d)++; (*dl)--; w += sldns_str_print(s, sl, "\""); for(i=0; i 0) w += sldns_str_print(s, sl, "."); if(i < (int)adflength) w += sldns_str_print(s, sl, "%d", (*d)[4+i]); else w += sldns_str_print(s, sl, "0"); } } else if(family == LDNS_APL_IP6) { /* check if prefix <128 ? */ /* address is variable length 0 - 16 */ for(i=0; i<16; i++) { if(i%2 == 0 && i>0) w += sldns_str_print(s, sl, ":"); if(i < (int)adflength) w += sldns_str_print(s, sl, "%02x", (*d)[4+i]); else w += sldns_str_print(s, sl, "00"); } } w += sldns_str_print(s, sl, "/%u", (unsigned)prefix); (*d) += 4+adflength; (*dl) -= 4+adflength; return w; } int sldns_wire2str_b32_ext_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { size_t datalen; size_t sz; if(*dl < 1) return -1; datalen = (*d)[0]; if(*dl < 1+datalen) return -1; sz = sldns_b32_ntop_calculate_size(datalen); if(*sl < sz+1) { (*d) += datalen+1; (*dl) -= (datalen+1); return (int)sz; /* out of space really, but would need buffer in order to truncate the output */ } sldns_b32_ntop_extended_hex((*d)+1, datalen, *s, *sl); (*d) += datalen+1; (*dl) -= (datalen+1); (*s) += sz; (*sl) -= sz; return (int)sz; } /** scan number of bytes from wire into b64 presentation format */ static int sldns_wire2str_b64_scan_num(uint8_t** d, size_t* dl, char** s, size_t* sl, size_t num) { /* b64_ntop_calculate size includes null at the end */ size_t sz = sldns_b64_ntop_calculate_size(num)-1; if(*sl < sz+1) { (*d) += num; (*dl) -= num; return (int)sz; /* out of space really, but would need buffer in order to truncate the output */ } sldns_b64_ntop(*d, num, *s, *sl); (*d) += num; (*dl) -= num; (*s) += sz; (*sl) -= sz; return (int)sz; } int sldns_wire2str_b64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { if(*dl == 0) { return sldns_str_print(s, sl, "0"); } return sldns_wire2str_b64_scan_num(d, dl, s, sl, *dl); } int sldns_wire2str_hex_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { if(*dl == 0) { return sldns_str_print(s, sl, "0"); } return print_remainder_hex("", d, dl, s, sl); } int sldns_wire2str_nsec_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { uint8_t* p = *d; size_t pl = *dl; unsigned i, bit, window, block_len; uint16_t t; int w = 0; /* check for errors */ while(pl) { if(pl < 2) return -1; block_len = (unsigned)p[1]; if(pl < 2+block_len) return -1; p += block_len+2; pl -= block_len+2; } /* do it */ p = *d; pl = *dl; while(pl) { if(pl < 2) return -1; /* cannot happen */ window = (unsigned)p[0]; block_len = (unsigned)p[1]; if(pl < 2+block_len) return -1; /* cannot happen */ p += 2; for(i=0; i>bit))) { if(w) w += sldns_str_print(s, sl, " "); w += sldns_wire2str_type_print(s, sl, t+bit); } } } p += block_len; pl -= block_len+2; } (*d) += *dl; (*dl) = 0; return w; } int sldns_wire2str_nsec3_salt_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { size_t salt_len; int w; if(*dl < 1) return -1; salt_len = (size_t)(*d)[0]; if(*dl < 1+salt_len) return -1; (*d)++; (*dl)--; if(salt_len == 0) { return sldns_str_print(s, sl, "-"); } w = print_hex_buf(s, sl, *d, salt_len); (*dl)-=salt_len; (*d)+=salt_len; return w; } int sldns_wire2str_cert_alg_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { sldns_lookup_table *lt; int data, w; if(*dl < 2) return -1; data = (int)sldns_read_uint16(*d); lt = sldns_lookup_by_id(sldns_cert_algorithms, data); if(lt && lt->name) w = sldns_str_print(s, sl, "%s", lt->name); else w = sldns_str_print(s, sl, "%d", data); (*dl)-=2; (*d)+=2; return w; } int sldns_wire2str_alg_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { /* don't use algorithm mnemonics in the presentation format * this kind of got sneaked into the rfc's */ return sldns_wire2str_int8_scan(d, dl, s, sl); } int sldns_wire2str_unknown_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { return sldns_wire2str_rdata_unknown_scan(d, dl, s, sl); } int sldns_wire2str_time_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { /* create a YYYYMMDDHHMMSS string if possible */ struct tm tm; char date_buf[16]; uint32_t t; memset(&tm, 0, sizeof(tm)); if(*dl < 4) return -1; t = sldns_read_uint32(*d); date_buf[15]=0; if(sldns_serial_arithmetics_gmtime_r(t, time(NULL), &tm) && strftime(date_buf, 15, "%Y%m%d%H%M%S", &tm)) { (*d) += 4; (*dl) -= 4; return sldns_str_print(s, sl, "%s", date_buf); } return -1; } static int loc_cm_print(char** str, size_t* sl, uint8_t mantissa, uint8_t exponent) { int w = 0; uint8_t i; /* is it 0. ? */ if(exponent < 2) { if(exponent == 1) mantissa *= 10; return sldns_str_print(str, sl, "0.%02ld", (long)mantissa); } /* always */ w += sldns_str_print(str, sl, "%d", (int)mantissa); for(i=0; i equator) { northerness = 'N'; latitude = latitude - equator; } else { northerness = 'S'; latitude = equator - latitude; } h = latitude / (1000 * 60 * 60); latitude = latitude % (1000 * 60 * 60); m = latitude / (1000 * 60); latitude = latitude % (1000 * 60); s = (double) latitude / 1000.0; w += sldns_str_print(str, sl, "%02u %02u %06.3f %c ", h, m, s, northerness); if (longitude > equator) { easterness = 'E'; longitude = longitude - equator; } else { easterness = 'W'; longitude = equator - longitude; } h = longitude / (1000 * 60 * 60); longitude = longitude % (1000 * 60 * 60); m = longitude / (1000 * 60); longitude = longitude % (1000 * 60); s = (double) longitude / (1000.0); w += sldns_str_print(str, sl, "%02u %02u %06.3f %c ", h, m, s, easterness); s = ((double) altitude) / 100; s -= 100000; if(altitude%100 != 0) w += sldns_str_print(str, sl, "%.2f", s); else w += sldns_str_print(str, sl, "%.0f", s); w += sldns_str_print(str, sl, "m "); w += loc_cm_print(str, sl, (size & 0xf0) >> 4, size & 0x0f); w += sldns_str_print(str, sl, "m "); w += loc_cm_print(str, sl, (horizontal_precision & 0xf0) >> 4, horizontal_precision & 0x0f); w += sldns_str_print(str, sl, "m "); w += loc_cm_print(str, sl, (vertical_precision & 0xf0) >> 4, vertical_precision & 0x0f); w += sldns_str_print(str, sl, "m"); (*d)+=16; (*dl)-=16; return w; } int sldns_wire2str_wks_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { /* protocol, followed by bitmap of services */ const char* proto_name = NULL; struct protoent *protocol; struct servent *service; uint8_t protocol_nr; int bit, port, w = 0; size_t i; /* we cannot print with strings because they * are not portable, the presentation format may * not be able to be read in on another computer. */ int print_symbols = 0; /* protocol */ if(*dl < 1) return -1; protocol_nr = (*d)[0]; (*d)++; (*dl)--; protocol = getprotobynumber((int)protocol_nr); if(protocol && (protocol->p_name != NULL)) { w += sldns_str_print(s, sl, "%s", protocol->p_name); proto_name = protocol->p_name; } else if(protocol_nr == 6) { w += sldns_str_print(s, sl, "tcp"); } else if(protocol_nr == 17) { w += sldns_str_print(s, sl, "udp"); } else { w += sldns_str_print(s, sl, "%u", (unsigned)protocol_nr); } for(i=0; i<*dl; i++) { if((*d)[i] == 0) continue; for(bit=0; bit<8; bit++) { if(!(((*d)[i])&(0x80>>bit))) continue; port = (int)i*8 + bit; if(!print_symbols) service = NULL; else service = getservbyport( (int)htons((uint16_t)port), proto_name); if(service && service->s_name) w += sldns_str_print(s, sl, " %s", service->s_name); else w += sldns_str_print(s, sl, " %u", (unsigned)port); } } #ifdef HAVE_ENDSERVENT endservent(); #endif #ifdef HAVE_ENDPROTOENT endprotoent(); #endif (*d) += *dl; (*dl) = 0; return w; } int sldns_wire2str_nsap_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { return print_remainder_hex("0x", d, dl, s, sl); } int sldns_wire2str_atma_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { return print_remainder_hex("", d, dl, s, sl); } /* internal scan routine that can modify arguments on failure */ static int sldns_wire2str_ipseckey_scan_internal(uint8_t** d, size_t* dl, char** s, size_t* sl, uint8_t* pkt, size_t pktlen, int* comprloop) { /* http://www.ietf.org/internet-drafts/draft-ietf-ipseckey-rr-12.txt*/ uint8_t precedence, gateway_type, algorithm; int w = 0; if(*dl < 3) return -1; precedence = (*d)[0]; gateway_type = (*d)[1]; algorithm = (*d)[2]; if(gateway_type > 3) return -1; /* unknown */ (*d)+=3; (*dl)-=3; w += sldns_str_print(s, sl, "%d %d %d ", (int)precedence, (int)gateway_type, (int)algorithm); switch(gateway_type) { case 0: /* no gateway */ w += sldns_str_print(s, sl, "."); break; case 1: /* ip4 */ w += sldns_wire2str_a_scan(d, dl, s, sl); break; case 2: /* ip6 */ w += sldns_wire2str_aaaa_scan(d, dl, s, sl); break; case 3: /* dname */ w += sldns_wire2str_dname_scan(d, dl, s, sl, pkt, pktlen, comprloop); break; default: /* unknown */ return -1; } if(*dl < 1) return -1; w += sldns_str_print(s, sl, " "); w += sldns_wire2str_b64_scan_num(d, dl, s, sl, *dl); return w; } int sldns_wire2str_ipseckey_scan(uint8_t** d, size_t* dl, char** s, size_t* sl, uint8_t* pkt, size_t pktlen, int* comprloop) { uint8_t* od = *d; char* os = *s; size_t odl = *dl, osl = *sl; int w=sldns_wire2str_ipseckey_scan_internal(d, dl, s, sl, pkt, pktlen, comprloop); if(w == -1) { *d = od; *s = os; *dl = odl; *sl = osl; return -1; } return w; } int sldns_wire2str_hip_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; uint8_t algo, hitlen; uint16_t pklen; /* read lengths */ if(*dl < 4) return -1; hitlen = (*d)[0]; algo = (*d)[1]; pklen = sldns_read_uint16((*d)+2); if(*dl < (size_t)4 + (size_t)hitlen + (size_t)pklen) return -1; /* write: algo hit pubkey */ w = sldns_str_print(s, sl, "%u ", (unsigned)algo); w += print_hex_buf(s, sl, (*d)+4, hitlen); w += sldns_str_print(s, sl, " "); (*d)+=4+hitlen; (*dl)-= (4+hitlen); w += sldns_wire2str_b64_scan_num(d, dl, s, sl, pklen); return w; } int sldns_wire2str_int16_data_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; uint16_t n; if(*dl < 2) return -1; n = sldns_read_uint16(*d); if(*dl < 2+(size_t)n) return -1; (*d)+=2; (*dl)-=2; if(n == 0) { return sldns_str_print(s, sl, "0"); } w = sldns_str_print(s, sl, "%u ", (unsigned)n); w += sldns_wire2str_b64_scan_num(d, dl, s, sl, n); return w; } int sldns_wire2str_nsec3_next_owner_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { return sldns_wire2str_b32_ext_scan(d, dl, s, sl); } int sldns_wire2str_ilnp64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 8) return -1; w = sldns_str_print(s, sl, "%.4x:%.4x:%.4x:%.4x", sldns_read_uint16(*d), sldns_read_uint16((*d)+2), sldns_read_uint16((*d)+4), sldns_read_uint16((*d)+6)); (*d)+=8; (*dl)-=8; return w; } int sldns_wire2str_eui48_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 6) return -1; w = sldns_str_print(s, sl, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x", (*d)[0], (*d)[1], (*d)[2], (*d)[3], (*d)[4], (*d)[5]); (*d)+=6; (*dl)-=6; return w; } int sldns_wire2str_eui64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { int w; if(*dl < 8) return -1; w = sldns_str_print(s, sl, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x-%.2x-%.2x", (*d)[0], (*d)[1], (*d)[2], (*d)[3], (*d)[4], (*d)[5], (*d)[6], (*d)[7]); (*d)+=8; (*dl)-=8; return w; } int sldns_wire2str_tag_scan(uint8_t** d, size_t* dl, char** s, size_t* sl) { size_t i, n; int w = 0; if(*dl < 1) return -1; n = (size_t)((*d)[0]); if(*dl < 1+n) return -1; for(i=0; iname) w = sldns_str_print(s, sl, "%s", lt->name); else w = sldns_str_print(s, sl, "%d", data); (*dl)-=2; (*d)+=2; return w; } int sldns_wire2str_edns_llq_print(char** s, size_t* sl, uint8_t* data, size_t len) { /* LLQ constants */ const char* llq_errors[] = {"NO-ERROR", "SERV-FULL", "STATIC", "FORMAT-ERR", "NO-SUCH-LLQ", "BAD-VERS", "UNKNOWN_ERR"}; const unsigned int llq_errors_num = 7; const char* llq_opcodes[] = {"LLQ-SETUP", "LLQ-REFRESH", "LLQ-EVENT"}; const unsigned int llq_opcodes_num = 3; uint16_t version, llq_opcode, error_code; uint64_t llq_id; uint32_t lease_life; /* Requested or granted life of LLQ, in seconds */ int w = 0; /* read the record */ if(len != 18) { w += sldns_str_print(s, sl, "malformed LLQ "); w += print_hex_buf(s, sl, data, len); return w; } version = sldns_read_uint16(data); llq_opcode = sldns_read_uint16(data+2); error_code = sldns_read_uint16(data+4); memmove(&llq_id, data+6, sizeof(llq_id)); lease_life = sldns_read_uint32(data+14); /* print it */ w += sldns_str_print(s, sl, "v%d ", (int)version); if(llq_opcode < llq_opcodes_num) w += sldns_str_print(s, sl, "%s", llq_opcodes[llq_opcode]); else w += sldns_str_print(s, sl, "opcode %d", (int)llq_opcode); if(error_code < llq_errors_num) w += sldns_str_print(s, sl, " %s", llq_errors[error_code]); else w += sldns_str_print(s, sl, " error %d", (int)error_code); #ifndef USE_WINSOCK w += sldns_str_print(s, sl, " id %llx lease-life %lu", (unsigned long long)llq_id, (unsigned long)lease_life); #else w += sldns_str_print(s, sl, " id %I64x lease-life %lu", (unsigned long long)llq_id, (unsigned long)lease_life); #endif return w; } int sldns_wire2str_edns_ul_print(char** s, size_t* sl, uint8_t* data, size_t len) { uint32_t lease; int w = 0; if(len != 4) { w += sldns_str_print(s, sl, "malformed UL "); w += print_hex_buf(s, sl, data, len); return w; } lease = sldns_read_uint32(data); w += sldns_str_print(s, sl, "lease %lu", (unsigned long)lease); return w; } int sldns_wire2str_edns_nsid_print(char** s, size_t* sl, uint8_t* data, size_t len) { int w = 0; size_t i, printed=0; w += print_hex_buf(s, sl, data, len); for(i=0; iname) w += sldns_str_print(s, sl, " %s", lt->name); else w += sldns_str_print(s, sl, " %d", (int)data[i]); } return w; } int sldns_wire2str_edns_dhu_print(char** s, size_t* sl, uint8_t* data, size_t len) { sldns_lookup_table *lt; size_t i; int w = 0; for(i=0; iname) w += sldns_str_print(s, sl, " %s", lt->name); else w += sldns_str_print(s, sl, " %d", (int)data[i]); } return w; } int sldns_wire2str_edns_n3u_print(char** s, size_t* sl, uint8_t* data, size_t len) { size_t i; int w = 0; for(i=0; i 4) { w += sldns_str_print(s, sl, "trailingdata:"); w += print_hex_buf(s, sl, data+4+4, len-4-4); w += sldns_str_print(s, sl, " "); len = 4+4; } memmove(ip4, data+4, len-4); if(!inet_ntop(AF_INET, ip4, buf, (socklen_t)sizeof(buf))) { w += sldns_str_print(s, sl, "ip4ntoperror "); w += print_hex_buf(s, sl, data+4+4, len-4-4); } else { w += sldns_str_print(s, sl, "%s", buf); } } else if(family == 2) { /* IP6 */ char buf[64]; uint8_t ip6[16]; memset(ip6, 0, sizeof(ip6)); if(len-4 > 16) { w += sldns_str_print(s, sl, "trailingdata:"); w += print_hex_buf(s, sl, data+4+16, len-4-16); w += sldns_str_print(s, sl, " "); len = 4+16; } memmove(ip6, data+4, len-4); #ifdef AF_INET6 if(!inet_ntop(AF_INET6, ip6, buf, (socklen_t)sizeof(buf))) { w += sldns_str_print(s, sl, "ip6ntoperror "); w += print_hex_buf(s, sl, data+4+4, len-4-4); } else { w += sldns_str_print(s, sl, "%s", buf); } #else w += print_hex_buf(s, sl, data+4+4, len-4-4); #endif } else { /* unknown */ w += sldns_str_print(s, sl, "family %d ", (int)family); w += print_hex_buf(s, sl, data, len); } w += sldns_str_print(s, sl, "/%d scope /%d", (int)source, (int)scope); return w; } static int sldns_wire2str_edns_keepalive_print(char** s, size_t* sl, uint8_t* data, size_t len) { int w = 0; uint16_t timeout; if(!(len == 0 || len == 2)) { w += sldns_str_print(s, sl, "malformed keepalive "); w += print_hex_buf(s, sl, data, len); return w; } if(len == 0 ) { w += sldns_str_print(s, sl, "no timeout value (only valid for client option) "); } else { timeout = sldns_read_uint16(data); w += sldns_str_print(s, sl, "timeout value in units of 100ms %u", (int)timeout); } return w; } int sldns_wire2str_edns_option_print(char** s, size_t* sl, uint16_t option_code, uint8_t* optdata, size_t optlen) { int w = 0; w += sldns_wire2str_edns_option_code_print(s, sl, option_code); w += sldns_str_print(s, sl, ": "); switch(option_code) { case LDNS_EDNS_LLQ: w += sldns_wire2str_edns_llq_print(s, sl, optdata, optlen); break; case LDNS_EDNS_UL: w += sldns_wire2str_edns_ul_print(s, sl, optdata, optlen); break; case LDNS_EDNS_NSID: w += sldns_wire2str_edns_nsid_print(s, sl, optdata, optlen); break; case LDNS_EDNS_DAU: w += sldns_wire2str_edns_dau_print(s, sl, optdata, optlen); break; case LDNS_EDNS_DHU: w += sldns_wire2str_edns_dhu_print(s, sl, optdata, optlen); break; case LDNS_EDNS_N3U: w += sldns_wire2str_edns_n3u_print(s, sl, optdata, optlen); break; case LDNS_EDNS_CLIENT_SUBNET: w += sldns_wire2str_edns_subnet_print(s, sl, optdata, optlen); break; case LDNS_EDNS_KEEPALIVE: w += sldns_wire2str_edns_keepalive_print(s, sl, optdata, optlen); break; case LDNS_EDNS_PADDING: w += print_hex_buf(s, sl, optdata, optlen); break; default: /* unknown option code */ w += print_hex_buf(s, sl, optdata, optlen); break; } return w; } /** print the edns options to string */ static int print_edns_opts(char** s, size_t* sl, uint8_t* rdata, size_t rdatalen) { uint16_t option_code, option_len; int w = 0; while(rdatalen > 0) { /* option name */ if(rdatalen < 4) { w += sldns_str_print(s, sl, " ; malformed: "); w += print_hex_buf(s, sl, rdata, rdatalen); return w; } option_code = sldns_read_uint16(rdata); option_len = sldns_read_uint16(rdata+2); rdata += 4; rdatalen -= 4; /* option value */ if(rdatalen < (size_t)option_len) { w += sldns_str_print(s, sl, " ; malformed "); w += sldns_wire2str_edns_option_code_print(s, sl, option_code); w += sldns_str_print(s, sl, ": "); w += print_hex_buf(s, sl, rdata, rdatalen); return w; } w += sldns_str_print(s, sl, " ; "); w += sldns_wire2str_edns_option_print(s, sl, option_code, rdata, option_len); rdata += option_len; rdatalen -= option_len; } return w; } int sldns_wire2str_edns_scan(uint8_t** data, size_t* data_len, char** str, size_t* str_len, uint8_t* pkt, size_t pktlen) { int w = 0; uint8_t ext_rcode, edns_version; uint16_t udpsize, edns_bits, rdatalen; w += sldns_str_print(str, str_len, "; EDNS:"); /* some input checks, domain name */ if(*data_len < 1+10) return w + print_remainder_hex("Error malformed 0x", data, data_len, str, str_len); if(*data[0] != 0) { return w + print_remainder_hex("Error nonrootdname 0x", data, data_len, str, str_len); } (*data)++; (*data_len)--; /* check type and read fixed contents */ if(sldns_read_uint16((*data)) != LDNS_RR_TYPE_OPT) { return w + print_remainder_hex("Error nottypeOPT 0x", data, data_len, str, str_len); } udpsize = sldns_read_uint16((*data)+2); ext_rcode = (*data)[4]; edns_version = (*data)[5]; edns_bits = sldns_read_uint16((*data)+6); rdatalen = sldns_read_uint16((*data)+8); (*data)+=10; (*data_len)-=10; w += sldns_str_print(str, str_len, " version: %u;", (unsigned)edns_version); w += sldns_str_print(str, str_len, " flags:"); if((edns_bits & LDNS_EDNS_MASK_DO_BIT)) w += sldns_str_print(str, str_len, " do"); /* the extended rcode is the value set, shifted four bits, * and or'd with the original rcode */ if(ext_rcode) { int rc = ((int)ext_rcode)<<4; if(pkt && pktlen >= LDNS_HEADER_SIZE) rc |= LDNS_RCODE_WIRE(pkt); w += sldns_str_print(str, str_len, " ; ext-rcode: %d", rc); } w += sldns_str_print(str, str_len, " ; udp: %u", (unsigned)udpsize); if(rdatalen) { if((size_t)*data_len < rdatalen) { w += sldns_str_print(str, str_len, " ; Error EDNS rdata too short; "); rdatalen = (uint16_t)*data_len; } w += print_edns_opts(str, str_len, *data, rdatalen); (*data) += rdatalen; (*data_len) -= rdatalen; } w += sldns_str_print(str, str_len, "\n"); return w; }