| /* $NetBSD: res_debug.c,v 1.13 2012/06/25 22:32:45 abs Exp $ */ | |
| /* | |
| * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") | |
| * Portions Copyright (C) 1996-2003 Internet Software Consortium. | |
| * | |
| * Permission to use, copy, modify, and/or distribute this software for any | |
| * purpose with or without fee is hereby granted, provided that the above | |
| * copyright notice and this permission notice appear in all copies. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH | |
| * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY | |
| * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, | |
| * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM | |
| * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE | |
| * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
| * PERFORMANCE OF THIS SOFTWARE. | |
| */ | |
| /* | |
| * Copyright (c) 1985 | |
| * The Regents of the University of California. All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions | |
| * are met: | |
| * 1. Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * 3. All advertising materials mentioning features or use of this software | |
| * must display the following acknowledgement: | |
| * This product includes software developed by the University of | |
| * California, Berkeley and its contributors. | |
| * 4. Neither the name of the University nor the names of its contributors | |
| * may be used to endorse or promote products derived from this software | |
| * without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| * SUCH DAMAGE. | |
| */ | |
| /* | |
| * Portions Copyright (c) 1993 by Digital Equipment Corporation. | |
| * | |
| * Permission to use, copy, modify, and distribute this software for any | |
| * purpose with or without fee is hereby granted, provided that the above | |
| * copyright notice and this permission notice appear in all copies, and that | |
| * the name of Digital Equipment Corporation not be used in advertising or | |
| * publicity pertaining to distribution of the document or software without | |
| * specific, written prior permission. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL | |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES | |
| * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT | |
| * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | |
| * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
| * SOFTWARE. | |
| */ | |
| /* | |
| * Portions Copyright (c) 1995 by International Business Machines, Inc. | |
| * | |
| * International Business Machines, Inc. (hereinafter called IBM) grants | |
| * permission under its copyrights to use, copy, modify, and distribute this | |
| * Software with or without fee, provided that the above copyright notice and | |
| * all paragraphs of this notice appear in all copies, and that the name of IBM | |
| * not be used in connection with the marketing of any product incorporating | |
| * the Software or modifications thereof, without specific, written prior | |
| * permission. | |
| * | |
| * To the extent it has a right to do so, IBM grants an immunity from suit | |
| * under its patents, if any, for the use, sale or manufacture of products to | |
| * the extent that such products are used for performing Domain Name System | |
| * dynamic updates in TCP/IP networks by means of the Software. No immunity is | |
| * granted for any product per se or for any other function of any product. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES, | |
| * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
| * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, | |
| * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING | |
| * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN | |
| * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
| */ | |
| #define LOG_TAG "resolv" | |
| #include "res_debug.h" | |
| #include <sys/param.h> | |
| #include <sys/socket.h> | |
| #include <arpa/inet.h> | |
| #include <arpa/nameser.h> | |
| #include <netinet/in.h> | |
| #include <aidl/android/net/IDnsResolver.h> | |
| #include <android-base/logging.h> | |
| #include <ctype.h> | |
| #include <errno.h> | |
| #include <inttypes.h> | |
| #include <math.h> | |
| #include <netdb.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <strings.h> | |
| #include <time.h> | |
| #include "doh.h" | |
| #include "resolv_private.h" | |
| // Default to disabling verbose logging unless overridden by Android.bp | |
| // for debuggable builds. | |
| // | |
| // NOTE: Verbose resolver logs could contain PII -- do NOT enable in production builds | |
| #ifndef RESOLV_ALLOW_VERBOSE_LOGGING | |
| #define RESOLV_ALLOW_VERBOSE_LOGGING 0 | |
| #endif | |
| struct res_sym { | |
| int number; /* Identifying number, like T_MX */ | |
| const char* name; /* Its symbolic name, like "MX" */ | |
| const char* humanname; /* Its fun name, like "mail exchanger" */ | |
| }; | |
| static void do_section(ns_msg* handle, ns_sect section) { | |
| int n, rrnum = 0; | |
| int buflen = 2048; | |
| ns_rr rr; | |
| std::string s; | |
| auto out = std::back_inserter(s); | |
| /* | |
| * Print answer records. | |
| */ | |
| for (;;) { | |
| if (ns_parserr(handle, section, rrnum, &rr)) { | |
| if (errno != ENODEV) fmt::format_to(out, "ns_parserr: {}", strerror(errno)); | |
| LOG(VERBOSE) << s; | |
| return; | |
| } | |
| if (rrnum == 0) { | |
| int opcode = ns_msg_getflag(*handle, ns_f_opcode); | |
| fmt::format_to(out, ";; {} SECTION:\n", p_section(section, opcode)); | |
| } | |
| if (section == ns_s_qd) | |
| fmt::format_to(out, ";;\t{}, type = {}, class = {}\n", ns_rr_name(rr), | |
| p_type(ns_rr_type(rr)), p_class(ns_rr_class(rr))); | |
| else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) { | |
| size_t rdatalen; | |
| uint16_t optcode, optlen; | |
| rdatalen = ns_rr_rdlen(rr); | |
| fmt::format_to(out, "; EDNS: version: {}, udp={}, flags={}\n", (rr.ttl >> 16) & 0xff, | |
| static_cast<int>(ns_rr_class(rr)), rr.ttl & 0xffff); | |
| const uint8_t* cp = ns_rr_rdata(rr); | |
| while (rdatalen <= ns_rr_rdlen(rr) && rdatalen >= 4) { | |
| int i; | |
| GETSHORT(optcode, cp); | |
| GETSHORT(optlen, cp); | |
| if (optcode == NS_OPT_NSID) { | |
| fmt::format_to(out, "; NSID: "); | |
| if (optlen == 0) { | |
| fmt::format_to(out, "; NSID\n"); | |
| } else { | |
| fmt::format_to(out, "; NSID: "); | |
| for (i = 0; i < optlen; i++) { | |
| fmt::format_to(out, "{:02x} ", cp[i]); | |
| } | |
| fmt::format_to(out, " ("); | |
| for (i = 0; i < optlen; i++) { | |
| fmt::format_to(out, "{} ", isprint(cp[i]) ? cp[i] : '.'); | |
| } | |
| fmt::format_to(out, ")\n"); | |
| } | |
| } else { | |
| if (optlen == 0) { | |
| fmt::format_to(out, "; OPT={}\n", optcode); | |
| } else { | |
| fmt::format_to(out, "; OPT={}: ", optcode); | |
| for (i = 0; i < optlen; i++) { | |
| fmt::format_to(out, "{:02x} ", cp[i]); | |
| } | |
| fmt::format_to(out, " ("); | |
| for (i = 0; i < optlen; i++) { | |
| fmt::format_to(out, "{}", isprint(cp[i]) ? cp[i] : '.'); | |
| } | |
| fmt::format_to(out, ")\n"); | |
| } | |
| } | |
| rdatalen -= 4 + optlen; | |
| cp += optlen; | |
| } | |
| } else { | |
| auto buf = std::make_unique<char[]>(buflen); | |
| n = ns_sprintrr(handle, &rr, NULL, NULL, buf.get(), (uint32_t)buflen); | |
| if (n < 0) { | |
| if (errno == ENOSPC) { | |
| if (buflen < 131072) { | |
| buflen += 1024; | |
| continue; | |
| } else { | |
| fmt::format_to(out, "buflen over 131072"); | |
| PLOG(VERBOSE) << s; | |
| return; | |
| } | |
| } | |
| fmt::format_to(out, "ns_sprintrr failed"); | |
| PLOG(VERBOSE) << s; | |
| return; | |
| } | |
| fmt::format_to(out, ";; {}\n", buf.get()); | |
| } | |
| rrnum++; | |
| } | |
| } | |
| // Convert bytes to its hexadecimal representation. | |
| // The returned string is double the size of input. | |
| std::string bytesToHexStr(std::span<const uint8_t> bytes) { | |
| static char const hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7', | |
| '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; | |
| std::string str; | |
| str.reserve(bytes.size() * 2); | |
| for (uint8_t ch : bytes) { | |
| str.append({hex[(ch & 0xf0) >> 4], hex[ch & 0xf]}); | |
| } | |
| return str; | |
| } | |
| /* | |
| * Print the contents of a query. | |
| * This is intended to be primarily a debugging routine. | |
| */ | |
| void res_pquery(std::span<const uint8_t> msg) { | |
| if (!WOULD_LOG(VERBOSE)) return; | |
| ns_msg handle; | |
| int qdcount, ancount, nscount, arcount; | |
| uint32_t opcode, rcode, id; | |
| if (ns_initparse(msg.data(), msg.size(), &handle) < 0) { | |
| PLOG(VERBOSE) << "ns_initparse failed"; | |
| return; | |
| } | |
| opcode = ns_msg_getflag(handle, ns_f_opcode); | |
| rcode = ns_msg_getflag(handle, ns_f_rcode); | |
| id = ns_msg_id(handle); | |
| qdcount = ns_msg_count(handle, ns_s_qd); | |
| ancount = ns_msg_count(handle, ns_s_an); | |
| nscount = ns_msg_count(handle, ns_s_ns); | |
| arcount = ns_msg_count(handle, ns_s_ar); | |
| /* | |
| * Print header fields. | |
| */ | |
| std::string s = fmt::format(";; ->>HEADER<<- opcode: {}, status: {}, id: {}\n", | |
| _res_opcodes[opcode], p_rcode((int)rcode), id); | |
| auto out = std::back_inserter(s); | |
| fmt::format_to(out, ";; flags:"); | |
| if (ns_msg_getflag(handle, ns_f_qr)) fmt::format_to(out, " qr"); | |
| if (ns_msg_getflag(handle, ns_f_aa)) fmt::format_to(out, " aa"); | |
| if (ns_msg_getflag(handle, ns_f_tc)) fmt::format_to(out, " tc"); | |
| if (ns_msg_getflag(handle, ns_f_rd)) fmt::format_to(out, " rd"); | |
| if (ns_msg_getflag(handle, ns_f_ra)) fmt::format_to(out, " ra"); | |
| if (ns_msg_getflag(handle, ns_f_z)) fmt::format_to(out, " ??"); | |
| if (ns_msg_getflag(handle, ns_f_ad)) fmt::format_to(out, " ad"); | |
| if (ns_msg_getflag(handle, ns_f_cd)) fmt::format_to(out, " cd"); | |
| fmt::format_to(out, "; {}: {}", p_section(ns_s_qd, (int)opcode), qdcount); | |
| fmt::format_to(out, ", {}: {}", p_section(ns_s_an, (int)opcode), ancount); | |
| fmt::format_to(out, ", {}: {}", p_section(ns_s_ns, (int)opcode), nscount); | |
| fmt::format_to(out, ", {}: {}", p_section(ns_s_ar, (int)opcode), arcount); | |
| LOG(VERBOSE) << s; | |
| /* | |
| * Print the various sections. | |
| */ | |
| do_section(&handle, ns_s_qd); | |
| do_section(&handle, ns_s_an); | |
| do_section(&handle, ns_s_ns); | |
| do_section(&handle, ns_s_ar); | |
| LOG(VERBOSE) << "Hex dump:"; | |
| LOG(VERBOSE) << bytesToHexStr(msg); | |
| } | |
| /* | |
| * Names of RR classes and qclasses. Classes and qclasses are the same, except | |
| * that C_ANY is a qclass but not a class. (You can ask for records of class | |
| * C_ANY, but you can't have any records of that class in the database.) | |
| */ | |
| static const struct res_sym p_class_syms[] = { | |
| {C_IN, "IN", (char*) 0}, {C_CHAOS, "CH", (char*) 0}, {C_CHAOS, "CHAOS", (char*) 0}, | |
| {C_HS, "HS", (char*) 0}, {C_HS, "HESIOD", (char*) 0}, {C_ANY, "ANY", (char*) 0}, | |
| {C_NONE, "NONE", (char*) 0}, {C_IN, (char*) 0, (char*) 0}}; | |
| /* | |
| * Names of message sections. | |
| */ | |
| static const struct res_sym p_default_section_syms[] = {{ns_s_qd, "QUERY", (char*) 0}, | |
| {ns_s_an, "ANSWER", (char*) 0}, | |
| {ns_s_ns, "AUTHORITY", (char*) 0}, | |
| {ns_s_ar, "ADDITIONAL", (char*) 0}, | |
| {0, (char*) 0, (char*) 0}}; | |
| static const struct res_sym p_update_section_syms[] = {{S_ZONE, "ZONE", (char*) 0}, | |
| {S_PREREQ, "PREREQUISITE", (char*) 0}, | |
| {S_UPDATE, "UPDATE", (char*) 0}, | |
| {S_ADDT, "ADDITIONAL", (char*) 0}, | |
| {0, (char*) 0, (char*) 0}}; | |
| /* | |
| * Names of RR types and qtypes. Types and qtypes are the same, except | |
| * that T_ANY is a qtype but not a type. (You can ask for records of type | |
| * T_ANY, but you can't have any records of that type in the database.) | |
| */ | |
| const struct res_sym p_type_syms[] = { | |
| {ns_t_a, "A", "address"}, | |
| {ns_t_ns, "NS", "name server"}, | |
| {ns_t_md, "MD", "mail destination (deprecated)"}, | |
| {ns_t_mf, "MF", "mail forwarder (deprecated)"}, | |
| {ns_t_cname, "CNAME", "canonical name"}, | |
| {ns_t_soa, "SOA", "start of authority"}, | |
| {ns_t_mb, "MB", "mailbox"}, | |
| {ns_t_mg, "MG", "mail group member"}, | |
| {ns_t_mr, "MR", "mail rename"}, | |
| {ns_t_null, "NULL", "null"}, | |
| {ns_t_wks, "WKS", "well-known service (deprecated)"}, | |
| {ns_t_ptr, "PTR", "domain name pointer"}, | |
| {ns_t_hinfo, "HINFO", "host information"}, | |
| {ns_t_minfo, "MINFO", "mailbox information"}, | |
| {ns_t_mx, "MX", "mail exchanger"}, | |
| {ns_t_txt, "TXT", "text"}, | |
| {ns_t_rp, "RP", "responsible person"}, | |
| {ns_t_afsdb, "AFSDB", "DCE or AFS server"}, | |
| {ns_t_x25, "X25", "X25 address"}, | |
| {ns_t_isdn, "ISDN", "ISDN address"}, | |
| {ns_t_rt, "RT", "router"}, | |
| {ns_t_nsap, "NSAP", "nsap address"}, | |
| {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"}, | |
| {ns_t_sig, "SIG", "signature"}, | |
| {ns_t_key, "KEY", "key"}, | |
| {ns_t_px, "PX", "mapping information"}, | |
| {ns_t_gpos, "GPOS", "geographical position (withdrawn)"}, | |
| {ns_t_aaaa, "AAAA", "IPv6 address"}, | |
| {ns_t_loc, "LOC", "location"}, | |
| {ns_t_nxt, "NXT", "next valid name (unimplemented)"}, | |
| {ns_t_eid, "EID", "endpoint identifier (unimplemented)"}, | |
| {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"}, | |
| {ns_t_srv, "SRV", "server selection"}, | |
| {ns_t_atma, "ATMA", "ATM address (unimplemented)"}, | |
| {ns_t_naptr, "NAPTR", "naptr"}, | |
| {ns_t_kx, "KX", "key exchange"}, | |
| {ns_t_cert, "CERT", "certificate"}, | |
| {ns_t_a6, "A", "IPv6 address (experminental)"}, | |
| {ns_t_dname, "DNAME", "non-terminal redirection"}, | |
| {ns_t_opt, "OPT", "opt"}, | |
| {ns_t_apl, "apl", "apl"}, | |
| {ns_t_ds, "DS", "delegation signer"}, | |
| {ns_t_sshfp, "SSFP", "SSH fingerprint"}, | |
| {ns_t_ipseckey, "IPSECKEY", "IPSEC key"}, | |
| {ns_t_rrsig, "RRSIG", "rrsig"}, | |
| {ns_t_nsec, "NSEC", "nsec"}, | |
| {ns_t_dnskey, "DNSKEY", "DNS key"}, | |
| {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"}, | |
| {ns_t_nsec3, "NSEC3", "nsec3"}, | |
| {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"}, | |
| {ns_t_hip, "HIP", "host identity protocol"}, | |
| {ns_t_spf, "SPF", "sender policy framework"}, | |
| {ns_t_tkey, "TKEY", "tkey"}, | |
| {ns_t_tsig, "TSIG", "transaction signature"}, | |
| {ns_t_ixfr, "IXFR", "incremental zone transfer"}, | |
| {ns_t_axfr, "AXFR", "zone transfer"}, | |
| {ns_t_zxfr, "ZXFR", "compressed zone transfer"}, | |
| {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"}, | |
| {ns_t_maila, "MAILA", "mail agent (deprecated)"}, | |
| {ns_t_naptr, "NAPTR", "URN Naming Authority"}, | |
| {ns_t_kx, "KX", "Key Exchange"}, | |
| {ns_t_cert, "CERT", "Certificate"}, | |
| {ns_t_a6, "A6", "IPv6 Address"}, | |
| {ns_t_dname, "DNAME", "dname"}, | |
| {ns_t_sink, "SINK", "Kitchen Sink (experimental)"}, | |
| {ns_t_opt, "OPT", "EDNS Options"}, | |
| {ns_t_any, "ANY", "\"any\""}, | |
| {ns_t_dlv, "DLV", "DNSSEC look-aside validation"}, | |
| {0, NULL, NULL}}; | |
| /* | |
| * Names of DNS rcodes. | |
| */ | |
| static const struct res_sym p_rcode_syms[] = {{ns_r_noerror, "NOERROR", "no error"}, | |
| {ns_r_formerr, "FORMERR", "format error"}, | |
| {ns_r_servfail, "SERVFAIL", "server failed"}, | |
| {ns_r_nxdomain, "NXDOMAIN", "no such domain name"}, | |
| {ns_r_notimpl, "NOTIMP", "not implemented"}, | |
| {ns_r_refused, "REFUSED", "refused"}, | |
| {ns_r_yxdomain, "YXDOMAIN", "domain name exists"}, | |
| {ns_r_yxrrset, "YXRRSET", "rrset exists"}, | |
| {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"}, | |
| {ns_r_notauth, "NOTAUTH", "not authoritative"}, | |
| {ns_r_notzone, "NOTZONE", "Not in zone"}, | |
| {ns_r_max, "", ""}, | |
| {ns_r_badsig, "BADSIG", "bad signature"}, | |
| {ns_r_badkey, "BADKEY", "bad key"}, | |
| {ns_r_badtime, "BADTIME", "bad time"}, | |
| {0, NULL, NULL}}; | |
| static const char* sym_ntos(const struct res_sym* syms, int number, int* success) { | |
| static char unname[20]; | |
| for (; syms->name != 0; syms++) { | |
| if (number == syms->number) { | |
| if (success) *success = 1; | |
| return (syms->name); | |
| } | |
| } | |
| snprintf(unname, sizeof(unname), "%d", number); /* XXX nonreentrant */ | |
| if (success) *success = 0; | |
| return (unname); | |
| } | |
| /* | |
| * Return a string for the type. | |
| */ | |
| const char* p_type(int type) { | |
| int success; | |
| const char* result; | |
| static char typebuf[20]; | |
| result = sym_ntos(p_type_syms, type, &success); | |
| if (success) return (result); | |
| if (type < 0 || type > 0xffff) return ("BADTYPE"); | |
| snprintf(typebuf, sizeof(typebuf), "TYPE%d", type); | |
| return (typebuf); | |
| } | |
| /* | |
| * Return a string for the type. | |
| */ | |
| const char* p_section(int section, int opcode) { | |
| const struct res_sym* symbols; | |
| switch (opcode) { | |
| case ns_o_update: | |
| symbols = p_update_section_syms; | |
| break; | |
| default: | |
| symbols = p_default_section_syms; | |
| break; | |
| } | |
| return (sym_ntos(symbols, section, (int*) 0)); | |
| } | |
| /* | |
| * Return a mnemonic for class. | |
| */ | |
| const char* p_class(int cl) { | |
| int success; | |
| const char* result; | |
| static char classbuf[20]; | |
| result = sym_ntos(p_class_syms, cl, &success); | |
| if (success) return (result); | |
| if (cl < 0 || cl > 0xffff) return ("BADCLASS"); | |
| snprintf(classbuf, sizeof(classbuf), "CLASS%d", cl); | |
| return (classbuf); | |
| } | |
| /* | |
| * Return a string for the rcode. | |
| */ | |
| const char* p_rcode(int rcode) { | |
| return (sym_ntos(p_rcode_syms, rcode, (int*) 0)); | |
| } | |
| int resolv_set_log_severity(uint32_t logSeverity) { | |
| switch (logSeverity) { | |
| case aidl::android::net::IDnsResolver::DNS_RESOLVER_LOG_VERBOSE: | |
| logSeverity = android::base::VERBOSE; | |
| doh_set_log_level(DOH_LOG_LEVEL_TRACE); | |
| // *** enable verbose logging only when DBG is set. It prints sensitive data *** | |
| if (RESOLV_ALLOW_VERBOSE_LOGGING == false) { | |
| logSeverity = android::base::DEBUG; | |
| doh_set_log_level(DOH_LOG_LEVEL_DEBUG); | |
| LOG(ERROR) << "Refusing to set VERBOSE logging in non-debuggable build"; | |
| // TODO: Return EACCES then callers could know if the log | |
| // severity is acceptable | |
| } | |
| break; | |
| case aidl::android::net::IDnsResolver::DNS_RESOLVER_LOG_DEBUG: | |
| logSeverity = android::base::DEBUG; | |
| doh_set_log_level(DOH_LOG_LEVEL_DEBUG); | |
| break; | |
| case aidl::android::net::IDnsResolver::DNS_RESOLVER_LOG_INFO: | |
| logSeverity = android::base::INFO; | |
| doh_set_log_level(DOH_LOG_LEVEL_INFO); | |
| break; | |
| case aidl::android::net::IDnsResolver::DNS_RESOLVER_LOG_WARNING: | |
| logSeverity = android::base::WARNING; | |
| doh_set_log_level(DOH_LOG_LEVEL_WARN); | |
| break; | |
| case aidl::android::net::IDnsResolver::DNS_RESOLVER_LOG_ERROR: | |
| logSeverity = android::base::ERROR; | |
| doh_set_log_level(DOH_LOG_LEVEL_ERROR); | |
| break; | |
| default: | |
| LOG(ERROR) << __func__ << ": invalid log severity: " << logSeverity; | |
| return -EINVAL; | |
| } | |
| android::base::SetMinimumLogSeverity(static_cast<android::base::LogSeverity>(logSeverity)); | |
| return 0; | |
| } |