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TServer: Avoid blindly using std::string::find's result

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This commit is contained in:
Lion Kortlepel
2021-07-29 13:09:29 +02:00
committed by Lion
parent 6c72432992
commit bceb3aefe4
1 changed files with 15 additions and 3 deletions
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src/TServer.cpp
+15 -3
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@@ -239,7 +239,9 @@ void TServer::ParseVehicle(TClient& c, const std::string& Pckt, TNetwork& Networ
std::make_unique<TLuaArg>(TLuaArg { { c.GetID(), VID, Packet.substr(3) } }), std::make_unique<TLuaArg>(TLuaArg { { c.GetID(), VID, Packet.substr(3) } }),
true); true);
if ((c.GetUnicycleID() != VID || IsUnicycle(c, Packet.substr(Packet.find('{')))) auto FoundPos = Packet.find('{');
FoundPos = FoundPos == std::string::npos ? 0 : FoundPos; // attempt at sanitizing this
if ((c.GetUnicycleID() != VID || IsUnicycle(c, Packet.substr(FoundPos)))
&& std::any_cast<int>(Res) == 0) { && std::any_cast<int>(Res) == 0) {
Network.SendToAll(&c, Packet, false, true); Network.SendToAll(&c, Packet, false, true);
Apply(c, VID, Packet); Apply(c, VID, Packet);
@@ -312,7 +314,12 @@ void TServer::ParseVehicle(TClient& c, const std::string& Pckt, TNetwork& Networ
} }
void TServer::Apply(TClient& c, int VID, const std::string& pckt) { void TServer::Apply(TClient& c, int VID, const std::string& pckt) {
std::string Packet = pckt.substr(pckt.find('{')); auto FoundPos = pckt.find('{');
if (FoundPos == std::string::npos) {
error("Malformed packet received, no '{' found");
return;
}
std::string Packet = pckt.substr(FoundPos);
std::string VD = c.GetCarData(VID); std::string VD = c.GetCarData(VID);
if (VD.empty()) { if (VD.empty()) {
error("Tried to apply change to vehicle that does not exist"); error("Tried to apply change to vehicle that does not exist");
@@ -320,7 +327,12 @@ void TServer::Apply(TClient& c, int VID, const std::string& pckt) {
} }
std::string Header = VD.substr(0, VD.find('{')); std::string Header = VD.substr(0, VD.find('{'));
VD = VD.substr(VD.find('{')); FoundPos = VD.find('{');
if (FoundPos == std::string::npos) {
error("Malformed packet received, no '{' found");
return;
}
VD = VD.substr(FoundPos);
rapidjson::Document Veh, Pack; rapidjson::Document Veh, Pack;
Veh.Parse(VD.c_str()); Veh.Parse(VD.c_str());
if (Veh.HasParseError()) { if (Veh.HasParseError()) {