1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
// Copyright (C) 2014-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include <config.h>
#include <cc/data.h>
#include <process/log_parser.h>
#include <boost/lexical_cast.hpp><--- Include file:  not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <log/logger_specification.h>
#include <log/logger_support.h>
#include <log/logger_manager.h>
#include <log/logger_name.h>

using namespace isc::data;
using namespace isc::log;

namespace isc {
namespace process {

LogConfigParser::LogConfigParser(const ConfigPtr& storage)
    :config_(storage), verbose_(false) {
    if (!storage) {
        isc_throw(BadValue, "LogConfigParser needs a pointer to the "
                  "configuration, so parsed data can be stored there");
    }
}

void LogConfigParser::parseConfiguration(const isc::data::ConstElementPtr& loggers,
                                         bool verbose) {
    verbose_ = verbose;

    // Iterate over all entries in "Server/loggers" list
    for (auto const& logger : loggers->listValue()) {
        parseConfigEntry(logger);
    }
}

void LogConfigParser::parseConfigEntry(isc::data::ConstElementPtr entry) {
    if (!entry) {
        // This should not happen, but let's be on the safe side and check
        return;
    }

    if (!config_) {
        isc_throw(BadValue, "configuration storage not set, can't parse logger config.");
    }

    LoggingInfo info;
    // Remove default destinations as we are going to replace them.
    info.clearDestinations();

    // Get user context
    isc::data::ConstElementPtr user_context = entry->get("user-context");
    if (user_context) {
        info.setContext(user_context);
    }

    // Get a name
    isc::data::ConstElementPtr name_ptr = entry->get("name");
    if (!name_ptr) {
        isc_throw(BadValue, "loggers entry does not have a mandatory 'name' "
                  "element (" << entry->getPosition() << ")");
    }
    info.name_ = name_ptr->stringValue();

    // Get the severity.
    // If not configured, set it to DEFAULT to inherit it from the root logger later.
    isc::data::ConstElementPtr severity_ptr = entry->get("severity");
    if (severity_ptr) {
        info.severity_ = getSeverity(severity_ptr->stringValue());
    } else {
        info.severity_ = DEFAULT;
    }

    // Get debug logging level
    info.debuglevel_ = 0;
    isc::data::ConstElementPtr debuglevel_ptr = entry->get("debuglevel");

    // It's ok to not have debuglevel, we'll just assume its least verbose
    // (0) level.
    if (debuglevel_ptr) {
        try {
            info.debuglevel_ = boost::lexical_cast<int>(debuglevel_ptr->str());
            if ( (info.debuglevel_ < 0) || (info.debuglevel_ > 99) ) {
                // Comment doesn't matter, it is caught several lines below
                isc_throw(BadValue, "");
            }
        } catch (...) {
            isc_throw(BadValue, "Unsupported debuglevel value '"
                      << debuglevel_ptr->stringValue()
                      << "', expected 0-99 ("
                      << debuglevel_ptr->getPosition() << ")");
        }
    }

    // We want to follow the normal path, so it could catch parsing errors even
    // when verbose mode is enabled. If it is, just override whatever was parsed
    // in the config file.
    if (verbose_) {
        info.severity_ = isc::log::DEBUG;
        info.debuglevel_ = 99;
    }

    isc::data::ConstElementPtr output_options = entry->get("output-options");

    if (output_options) {
        parseOutputOptions(info.destinations_, output_options);
    }

    config_->addLoggingInfo(info);
}

void LogConfigParser::parseOutputOptions(std::vector<LoggingDestination>& destination,
                                         isc::data::ConstElementPtr output_options) {
    if (!output_options) {
        isc_throw(BadValue, "Missing 'output-options' structure in 'loggers'");
    }

    for (auto const& output_option : output_options->listValue()) {

        LoggingDestination dest;

        isc::data::ConstElementPtr output = output_option->get("output");
        if (!output) {
            isc_throw(BadValue, "output-options entry does not have a mandatory 'output' "
                      "element (" << output_option->getPosition() << ")");
        }
        dest.output_ = output->stringValue();

        isc::data::ConstElementPtr maxver_ptr = output_option->get("maxver");
        if (maxver_ptr) {
            dest.maxver_ = boost::lexical_cast<int>(maxver_ptr->str());
        }

        isc::data::ConstElementPtr maxsize_ptr = output_option->get("maxsize");
        if (maxsize_ptr) {
            dest.maxsize_ = boost::lexical_cast<uint64_t>(maxsize_ptr->str());
        }

        isc::data::ConstElementPtr flush_ptr = output_option->get("flush");
        if (flush_ptr) {
            dest.flush_ = flush_ptr->boolValue();
        }

        isc::data::ConstElementPtr pattern = output_option->get("pattern");
        if (pattern) {
            dest.pattern_ = pattern->stringValue();
        }

        destination.push_back(dest);
    }
}

} // namespace isc::dhcp
} // namespace isc