MMDVMHost-Private/DMRAccessControl.cpp

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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
*/
#include "DMRAccessControl.h"
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#include "Log.h"
#include <algorithm>
#include <vector>
#include <cstring>
std::vector<unsigned int> DMRAccessControl::m_dstBlackListSlot1RF;
std::vector<unsigned int> DMRAccessControl::m_dstBlackListSlot2RF;
std::vector<unsigned int> DMRAccessControl::m_dstWhiteListSlot1RF;
std::vector<unsigned int> DMRAccessControl::m_dstWhiteListSlot2RF;
std::vector<unsigned int> DMRAccessControl::m_dstBlackListSlot1NET;
std::vector<unsigned int> DMRAccessControl::m_dstBlackListSlot2NET;
std::vector<unsigned int> DMRAccessControl::m_dstWhiteListSlot1NET;
std::vector<unsigned int> DMRAccessControl::m_dstWhiteListSlot2NET;
std::vector<unsigned int> DMRAccessControl::m_srcIdBlacklist;
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std::vector<unsigned int> DMRAccessControl::m_prefixes;
bool DMRAccessControl::m_selfOnly = false;
unsigned int DMRAccessControl::m_id = 0U;
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unsigned int DMRAccessControl::m_dstRewriteID = 0U;
unsigned int DMRAccessControl::m_srcID = 0U;
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CDMRLC* DMRAccessControl::m_lastdmrLC;
time_t DMRAccessControl::m_time;
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int DMRAccessControl::m_callHang;
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bool DMRAccessControl::m_tgRewriteSlot1;
bool DMRAccessControl::m_tgRewriteSlot2;
bool DMRAccessControl::m_bmAutoRewrite;
bool DMRAccessControl::m_bmRewriteReflectorVoicePrompts;
void DMRAccessControl::init(const std::vector<unsigned int>& dstIdBlacklistSlot1RF, const std::vector<unsigned int>& dstIdWhitelistSlot1RF, const std::vector<unsigned int>& dstIdBlacklistSlot2RF, const std::vector<unsigned int>& dstIdWhitelistSlot2RF, const std::vector<unsigned int>& dstIdBlacklistSlot1NET, const std::vector<unsigned int>& dstIdWhitelistSlot1NET, const std::vector<unsigned int>& dstIdBlacklistSlot2NET, const std::vector<unsigned int>& dstIdWhitelistSlot2NET, const std::vector<unsigned int>& srcIdBlacklist, bool selfOnly, const std::vector<unsigned int>& prefixes, unsigned int id, unsigned int callHang, bool tgRewriteSlot1, bool tgRewriteSlot2, bool bmAutoRewrite, bool bmRewriteReflectorVoicePrompts)
{
m_dstBlackListSlot1RF = dstIdBlacklistSlot1RF;
m_dstWhiteListSlot1RF = dstIdWhitelistSlot1RF;
m_dstBlackListSlot2RF = dstIdBlacklistSlot2RF;
m_dstWhiteListSlot2RF = dstIdWhitelistSlot2RF;
m_dstBlackListSlot1NET = dstIdBlacklistSlot1NET;
m_dstWhiteListSlot1NET = dstIdWhitelistSlot1NET;
m_dstBlackListSlot2NET = dstIdBlacklistSlot2NET;
m_dstWhiteListSlot2NET = dstIdWhitelistSlot2NET;
m_callHang = callHang;
m_tgRewriteSlot1 = tgRewriteSlot1;
m_tgRewriteSlot2 = tgRewriteSlot2;
m_bmAutoRewrite = bmAutoRewrite;
m_bmRewriteReflectorVoicePrompts = bmRewriteReflectorVoicePrompts;
}
bool DMRAccessControl::dstIdBlacklist(unsigned int did, unsigned int slot, bool network)
{
static std::vector<unsigned int> blacklist;
if (slot == 1U) {
if (network)
blacklist = m_dstBlackListSlot1NET;
else
blacklist = m_dstBlackListSlot1RF;
} else {
if (network)
blacklist = m_dstBlackListSlot2NET;
else
blacklist = m_dstBlackListSlot2RF;
}
return std::find(blacklist.begin(), blacklist.end(), did) != blacklist.end();
}
bool DMRAccessControl::dstIdWhitelist(unsigned int did, unsigned int slot, bool gt4k, bool network)
{
if (network) {
if (slot == 1U) {
if (m_dstWhiteListSlot1NET.size() == 0U)
return true;
// No reflectors on slot1, so we only allow all IDs over 99999 unless specifically whitelisted.
// Allow traffic to TG0 as I think this is a special case - need to confirm
if (gt4k) {
if (std::find(m_dstWhiteListSlot1NET.begin(), m_dstWhiteListSlot1NET.end(), did) != m_dstWhiteListSlot1NET.end() || did >= 99999U || did == 0)
return true;
} else {
if (std::find(m_dstWhiteListSlot1NET.begin(), m_dstWhiteListSlot1NET.end(), did) != m_dstWhiteListSlot1NET.end() || did == 0)
return true;
}
} else {
if (m_dstWhiteListSlot2NET.size() == 0U)
return true;
// On slot2 we allow reflector control IDs, but not secondary TG IDs unless specifically listed. Also allow echo.
if (gt4k) {
if (std::find(m_dstWhiteListSlot2NET.begin(), m_dstWhiteListSlot2NET.end(), did) != m_dstWhiteListSlot2NET.end() || did == 0)
return true;
// If dstId in secondary TG range or whitelist
else if (did >= 4000) {
if (did > 5000U && did < 10000U)
return false;
else
return true;
}
} else {
if (std::find(m_dstWhiteListSlot2NET.begin(), m_dstWhiteListSlot2NET.end(), did) != m_dstWhiteListSlot2NET.end())
return true;
}
}
return false;
} else {
if (slot == 1U) {
if (m_dstWhiteListSlot1RF.size() == 0U)
return true;
// No reflectors on slot1, so we only allow all IDs over 99999 unless specifically whitelisted.
// Allow traffic to TG0 as I think this is a special case - need to confirm
if (gt4k) {
if (std::find(m_dstWhiteListSlot1RF.begin(), m_dstWhiteListSlot1RF.end(), did) != m_dstWhiteListSlot1RF.end() || did >= 99999U || did == 0)
return true;
} else {
if (std::find(m_dstWhiteListSlot1RF.begin(), m_dstWhiteListSlot1RF.end(), did) != m_dstWhiteListSlot1RF.end() || did == 0)
return true;
}
} else {
if (m_dstWhiteListSlot2RF.size() == 0U)
return true;
// On slot2 we allow reflector control IDs, but not secondary TG IDs unless specifically listed. Also allow echo.
if (gt4k) {
if (std::find(m_dstWhiteListSlot2RF.begin(), m_dstWhiteListSlot2RF.end(), did) != m_dstWhiteListSlot2RF.end() || did == 0)
return true;
// If dstId in secondary TG range or whitelist
else if (did >= 4000U) {
if (did > 5000U && did < 10000U)
return false;
else
return true;
}
} else {
if (std::find(m_dstWhiteListSlot2RF.begin(), m_dstWhiteListSlot2RF.end(), did) != m_dstWhiteListSlot2RF.end())
return true;
}
}
return false;
}
}
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bool DMRAccessControl::validateSrcId(unsigned int id)
{
if (m_selfOnly) {
return id == m_id;
} else {
if (std::find(m_srcIdBlacklist.begin(), m_srcIdBlacklist.end(), id) != m_srcIdBlacklist.end())
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return false;
unsigned int prefix = id / 10000U;
if (prefix == 0U || prefix > 999U)
return false;
if (m_prefixes.size() == 0U)
return true;
return std::find(m_prefixes.begin(), m_prefixes.end(), prefix) != m_prefixes.end();
}
}
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bool DMRAccessControl::validateAccess(unsigned int src_id, unsigned int dst_id, unsigned int slot, bool network)
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{
// source ID validation is only applied to RF traffic
if (!network && !DMRAccessControl::validateSrcId(src_id)) {
LogMessage("DMR Slot %u, invalid access attempt from %u (blacklisted)", slot, src_id);
return false;
} else if (DMRAccessControl::dstIdBlacklist(dst_id, slot, network)) {
LogMessage("DMR Slot %u, invalid access attempt to TG%u (TG blacklisted)", slot, dst_id);
return false;
} else if (!DMRAccessControl::dstIdWhitelist(dst_id, slot, true, network)) {
LogMessage("DMR Slot %u, invalid access attempt to TG%u (TG not in whitelist)", slot, dst_id);
return false;
} else {
return true;
}
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}
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unsigned int DMRAccessControl::dstIdRewrite(unsigned int did, unsigned int sid, unsigned int slot, bool network, CDMRLC* dmrLC)
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{
if (slot == 1U && !m_tgRewriteSlot1)
return 0U;
if (slot == 2U && !m_tgRewriteSlot2)
return 0U;
time_t currenttime = ::time(NULL);
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if (network) {
m_dstRewriteID = did;
m_srcID = sid;
//not needed at present - for direct dial, which requires change at master end.
//memcpy(&m_lastdmrLC, &dmrLC, sizeof(dmrLC));
if (m_bmAutoRewrite && (did < 4000U || did > 5000U) && did > 0U && did != 9U && dmrLC->getFLCO() == FLCO_GROUP ) {
LogMessage("DMR Slot %u, Rewrite DST ID (TG) of of inbound network traffic from %u to 9",slot,did);
return 9U;
// rewrite incoming BM voice prompts to TG 9
} else if (m_bmRewriteReflectorVoicePrompts && (sid >= 4000U && sid <= 5000U) && dmrLC->getFLCO() == FLCO_USER_USER) {
dmrLC->setFLCO(FLCO_GROUP);
LogMessage("DMR Slot %u, Rewrite inbound private call to %u to Group Call on TG 9 (BM reflector voice prompt)",slot,did);
return 9U;
} else {
return 0U;
}
} else if (m_bmAutoRewrite && did == 9U && m_dstRewriteID != 9U && m_dstRewriteID != 0U && (m_time + m_callHang) > currenttime && dmrLC->getFLCO() == FLCO_GROUP ) {
LogMessage("DMR Slot %u, Rewrite DST ID (TG) of outbound network traffic from %u to %u (return traffic during CallHang)",slot,did,m_dstRewriteID);
return m_dstRewriteID;
} else if (m_bmAutoRewrite && (did < 4000U || did > 5000U) && did > 0U && did !=9U && did < 99999U && dmrLC->getFLCO() == FLCO_USER_USER) {
m_dstRewriteID = did;
dmrLC->setFLCO(FLCO_GROUP);
LogMessage("DMR Slot %u, Rewrite outbound private call to %u Group Call (Connect talkgroup by private call)",slot,did);
return did;
} else if (m_bmAutoRewrite && (did < 4000U || did > 5000U) && did > 0U && did !=9U && did > 99999U) {
m_dstRewriteID = did;
}
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return 0U;
}
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void DMRAccessControl::setOverEndTime()
{
m_time = ::time(NULL);
}