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312 lines
8.2 KiB
312 lines
8.2 KiB
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Digital Voice Modem - Common Library
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright (C) 2016 Jonathan Naylor, G4KLX
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* Copyright (C) 2017-2022,2025 Bryan Biedenkapp, N2PLL
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* Copyright (c) 2024 Patrick McDonnell, W3AXL
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*
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*/
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#include "lookups/RadioIdLookup.h"
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#include "p25/P25Defines.h"
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#include "Log.h"
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using namespace lookups;
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#include <cstdlib>
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#include <string>
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#include <vector>
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#include <fstream>
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// ---------------------------------------------------------------------------
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// Static Class Members
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// ---------------------------------------------------------------------------
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std::mutex RadioIdLookup::s_mutex;
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bool RadioIdLookup::s_locked = false;
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// ---------------------------------------------------------------------------
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// Macros
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// ---------------------------------------------------------------------------
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// Lock the table.
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#define __LOCK_TABLE() \
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std::lock_guard<std::mutex> lock(s_mutex); \
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s_locked = true;
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// Unlock the table.
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#define __UNLOCK_TABLE() s_locked = false;
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// Spinlock wait for table to be read unlocked.
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#define __SPINLOCK() \
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if (s_locked) { \
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while (s_locked) \
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Thread::sleep(2U); \
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}
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// ---------------------------------------------------------------------------
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// Public Class Members
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// ---------------------------------------------------------------------------
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/* Initializes a new instance of the RadioIdLookup class. */
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RadioIdLookup::RadioIdLookup(const std::string& filename, uint32_t reloadTime, bool ridAcl, bool verbose) : LookupTable(filename, reloadTime),
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m_acl(ridAcl),
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m_verbose(verbose)
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{
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/* stub */
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}
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/* Clears all entries from the lookup table. */
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void RadioIdLookup::clear()
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{
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__LOCK_TABLE();
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m_table.clear();
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__UNLOCK_TABLE();
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}
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/* Toggles the specified radio ID enabled or disabled. */
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void RadioIdLookup::toggleEntry(uint32_t id, bool enabled)
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{
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RadioId rid = find(id);
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addEntry(id, enabled, rid.radioAlias());
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}
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/* Adds a new entry to the lookup table by the specified unique ID. */
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void RadioIdLookup::addEntry(uint32_t id, bool enabled, const std::string& alias, const std::string& ipAddress)
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{
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if ((id == p25::defines::WUID_ALL) || (id == p25::defines::WUID_FNE)) {
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return;
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}
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RadioId entry = RadioId(enabled, false, alias, ipAddress);
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__LOCK_TABLE();
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try {
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RadioId _entry = m_table.at(id);
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// if either the alias or the enabled flag doesn't match, update the entry
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if (_entry.radioEnabled() != enabled || _entry.radioAlias() != alias) {
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//LogDebug(LOG_HOST, "Updating existing RID %d (%s) in ACL", id, alias.c_str());
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_entry = RadioId(enabled, false, alias, ipAddress);
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m_table[id] = _entry;
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} else {
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//LogDebug(LOG_HOST, "No changes made to RID %d (%s) in ACL", id, alias.c_str());
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}
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} catch (...) {
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//LogDebug(LOG_HOST, "Adding new RID %d (%s) to ACL", id, alias.c_str());
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m_table[id] = entry;
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}
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__UNLOCK_TABLE();
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}
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/* Erases an existing entry from the lookup table by the specified unique ID. */
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void RadioIdLookup::eraseEntry(uint32_t id)
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{
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__LOCK_TABLE();
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try {
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RadioId entry = m_table.at(id); // this value will get discarded
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(void)entry; // but some variants of C++ mark the unordered_map<>::at as nodiscard
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m_table.erase(id);
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}
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catch (...) {
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/* stub */
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}
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__UNLOCK_TABLE();
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}
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/* Finds a table entry in this lookup table. */
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RadioId RadioIdLookup::find(uint32_t id)
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{
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RadioId entry;
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if ((id == p25::defines::WUID_ALL) || (id == p25::defines::WUID_FNE)) {
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return RadioId(true, false);
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}
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__SPINLOCK();
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try {
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entry = m_table.at(id);
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} catch (...) {
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entry = RadioId(false, true);
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}
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return entry;
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}
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/* Saves loaded talkgroup rules. */
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void RadioIdLookup::commit(bool quiet)
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{
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save(quiet);
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}
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/* Flag indicating whether radio ID access control is enabled or not. */
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bool RadioIdLookup::getACL()
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{
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return m_acl;
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}
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// ---------------------------------------------------------------------------
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// Private Class Members
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// ---------------------------------------------------------------------------
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/* Loads the table from the passed lookup table file. */
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bool RadioIdLookup::load()
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{
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if (m_filename.empty()) {
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return false;
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}
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std::ifstream file (m_filename, std::ifstream::in);
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if (file.fail()) {
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LogError(LOG_HOST, "Cannot open the radio ID lookup file - %s", m_filename.c_str());
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return false;
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}
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// clear table
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clear();
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__LOCK_TABLE();
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// read lines from file
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std::string line;
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while (std::getline(file, line)) {
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if (line.length() > 0) {
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// Skip comments with #
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if (line.at(0) == '#')
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continue;
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// tokenize line
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std::vector<std::string> parsed;
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std::stringstream ss(line);
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std::string field;
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char delim = ',';
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while (std::getline(ss, field, delim))
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parsed.push_back(field);
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// ensure we have at least 2 fields
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if (parsed.size() < 2) {
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LogError(LOG_HOST, "Invalid entry in radio ID lookup table - %s", line.c_str());
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continue;
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}
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// parse tokenized line
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uint32_t id = ::atoi(parsed[0].c_str());
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bool radioEnabled = ::atoi(parsed[1].c_str()) == 1;
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std::string alias = "";
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std::string ipAddress = "";
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// check for an optional alias field
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if (parsed.size() >= 3) {
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alias = parsed[2];
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}
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// check for an optional IP address field
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if (parsed.size() >= 4) {
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ipAddress = parsed[3];
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}
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m_table[id] = RadioId(radioEnabled, false, alias, ipAddress);
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if (m_verbose) {
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LogInfoEx(LOG_HOST, "Radio NAME: %s RID: %u ENABLED: %u IPADDR: %s", alias.c_str(), id, radioEnabled, ipAddress.c_str());
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}
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}
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}
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file.close();
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__UNLOCK_TABLE();
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size_t size = m_table.size();
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if (size == 0U)
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return false;
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uint64_t now = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
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m_lastLoadTime = now;
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LogInfoEx(LOG_HOST, "Loaded %lu entries into radio ID lookup table", size);
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return true;
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}
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/* Saves the table to the passed lookup table file. */
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bool RadioIdLookup::save(bool quiet)
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{
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if (m_filename.empty()) {
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return false;
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}
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std::ofstream file (m_filename, std::ofstream::out);
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if (file.fail()) {
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LogError(LOG_HOST, "Cannot open the radio ID lookup file - %s", m_filename.c_str());
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return false;
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}
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if (!quiet)
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LogInfoEx(LOG_HOST, "Saving RID lookup file to %s", m_filename.c_str());
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// Counter for lines written
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unsigned int lines = 0;
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std::lock_guard<std::mutex> lock(s_mutex);
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// String for writing
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std::string line;
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// iterate over each entry in the RID lookup and write it to the open file
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for (auto& entry: m_table) {
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// get the parameters
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uint32_t rid = entry.first;
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bool enabled = entry.second.radioEnabled();
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std::string alias = entry.second.radioAlias();
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std::string ipAddress = entry.second.radioIPAddress();
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// format into a string
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line = std::to_string(rid) + "," + std::to_string(enabled) + ",";
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// add the alias if we have one
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if (alias.length() > 0) {
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line += alias;
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line += ",";
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}
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// add the IP address if we have one
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if (ipAddress.length() > 0) {
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line += ipAddress;
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line += ",";
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}
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line += "\n";
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file << line;
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lines++;
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}
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file.close();
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if (lines != m_table.size())
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return false;
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if (!quiet)
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LogInfoEx(LOG_HOST, "Saved %u entries to lookup table file %s", lines, m_filename.c_str());
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return true;
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}
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