1 /*
2  *  Copyright (c) 2023, The OpenThread Authors.
3  *  All rights reserved.
4  *
5  *  Redistribution and use in source and binary forms, with or without
6  *  modification, are permitted provided that the following conditions are met:
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8  *     notice, this list of conditions and the following disclaimer.
9  *  2. Redistributions in binary form must reproduce the above copyright
10  *     notice, this list of conditions and the following disclaimer in the
11  *     documentation and/or other materials provided with the distribution.
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13  *     names of its contributors may be used to endorse or promote products
14  *     derived from this software without specific prior written permission.
15  *
16  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17  *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20  *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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26  *  POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 /**
30  * @file
31  *   This file contains definitions for CLI to DNS (client and resolver).
32  */
33 
34 #ifndef CLI_DNS_HPP_
35 #define CLI_DNS_HPP_
36 
37 #include "openthread-core-config.h"
38 
39 #ifdef OPENTHREAD_CLI_DNS_ENABLE
40 #error "OPENTHREAD_CLI_DNS_ENABLE MUST not be defined directly, it is derived from `OPENTHREAD_CONFIG_*` configs".
41 #endif
42 
43 #if OPENTHREAD_CONFIG_DNS_CLIENT_ENABLE || OPENTHREAD_CONFIG_DNSSD_SERVER_ENABLE || \
44     OPENTHREAD_CONFIG_REFERENCE_DEVICE_ENABLE
45 #define OPENTHREAD_CLI_DNS_ENABLE 1
46 #else
47 #define OPENTHREAD_CLI_DNS_ENABLE 0
48 #endif
49 
50 #if OPENTHREAD_CLI_DNS_ENABLE
51 
52 #include <openthread/dns.h>
53 #include <openthread/dns_client.h>
54 #include <openthread/dnssd_server.h>
55 
56 #include "cli/cli_config.h"
57 #include "cli/cli_output.hpp"
58 
59 namespace ot {
60 namespace Cli {
61 
62 /**
63  * Implements the DNS CLI interpreter.
64  *
65  */
66 class Dns : private Output
67 {
68 public:
69     typedef Utils::CmdLineParser::Arg Arg;
70 
71     /**
72      * Constructor.
73      *
74      * @param[in]  aInstance            The OpenThread Instance.
75      * @param[in]  aOutputImplementer   An `OutputImplementer`.
76      *
77      */
Dns(otInstance * aInstance,OutputImplementer & aOutputImplementer)78     Dns(otInstance *aInstance, OutputImplementer &aOutputImplementer)
79         : Output(aInstance, aOutputImplementer)
80     {
81     }
82 
83     /**
84      * Processes a CLI sub-command.
85      *
86      * @param[in]  aArgs     An array of command line arguments.
87      *
88      * @retval OT_ERROR_NONE              Successfully executed the CLI command.
89      * @retval OT_ERROR_PENDING           The CLI command was successfully started but final result is pending.
90      * @retval OT_ERROR_INVALID_COMMAND   Invalid or unknown CLI command.
91      * @retval OT_ERROR_INVALID_ARGS      Invalid arguments.
92      * @retval ...                        Error during execution of the CLI command.
93      *
94      */
95     otError Process(Arg aArgs[]);
96 
97 private:
98     static constexpr uint8_t  kIndentSize     = 4;
99     static constexpr uint16_t kMaxTxtDataSize = OPENTHREAD_CONFIG_CLI_TXT_RECORD_MAX_SIZE;
100 
101     using Command = CommandEntry<Dns>;
102 
103     template <CommandId kCommandId> otError Process(Arg aArgs[]);
104 
105 #if OPENTHREAD_CONFIG_DNS_CLIENT_ENABLE
106     void        OutputResult(otError aError);
107     otError     GetDnsConfig(Arg aArgs[], otDnsQueryConfig *&aConfig);
108     const char *DnsConfigServiceModeToString(otDnsServiceMode aMode) const;
109     otError     ParseDnsServiceMode(const Arg &aArg, otDnsServiceMode &aMode) const;
110     static void HandleDnsAddressResponse(otError aError, const otDnsAddressResponse *aResponse, void *aContext);
111     void        HandleDnsAddressResponse(otError aError, const otDnsAddressResponse *aResponse);
112 #if OPENTHREAD_CONFIG_DNS_CLIENT_SERVICE_DISCOVERY_ENABLE
113     static const char *const kServiceModeStrings[];
114 
115     typedef otError (&ResolveServiceFn)(otInstance *,
116                                         const char *,
117                                         const char *,
118                                         otDnsServiceCallback,
119                                         void *,
120                                         const otDnsQueryConfig *);
121 
122     otError     ProcessService(Arg aArgs[], ResolveServiceFn aResolveServiceFn);
123     void        OutputDnsServiceInfo(uint8_t aIndentSize, const otDnsServiceInfo &aServiceInfo);
124     static void HandleDnsBrowseResponse(otError aError, const otDnsBrowseResponse *aResponse, void *aContext);
125     void        HandleDnsBrowseResponse(otError aError, const otDnsBrowseResponse *aResponse);
126     static void HandleDnsServiceResponse(otError aError, const otDnsServiceResponse *aResponse, void *aContext);
127     void        HandleDnsServiceResponse(otError aError, const otDnsServiceResponse *aResponse);
128 #endif
129 #endif
130 };
131 
132 } // namespace Cli
133 } // namespace ot
134 
135 #endif // OPENTHREAD_CLI_DNS_ENABLE
136 
137 #endif // CLI_DNS_HPP_
138