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Avoid UB and abort on nullptr buffer #7822

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Merged
merged 4 commits into from
Jan 12, 2021
Merged

Avoid UB and abort on nullptr buffer #7822

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47d24a0
Avoid UB and abort on nullptr buffer
paulocsanz Jan 12, 2021
c19e025
Improve handling of nullptr buffer
paulocsanz Jan 12, 2021
34bbf13
Fix style
paulocsanz Jan 12, 2021
0b55775
Report OOM on return value
paulocsanz Jan 12, 2021
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8 changes: 7 additions & 1 deletion libraries/Netdump/src/Netdump.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -84,19 +84,25 @@ void Netdump::fileDump(File& outfile, const Filter nf)
fileDumpProcess(outfile, ndp);
}, nf);
}
void Netdump::tcpDump(WiFiServer &tcpDumpServer, const Filter nf)
bool Netdump::tcpDump(WiFiServer &tcpDumpServer, const Filter nf)
{

if (!packetBuffer)
{
packetBuffer = new (std::nothrow) char[tcpBufferSize];

if (!packetBuffer)
{
return false;
}
}
bufferIndex = 0;

schedule_function([&tcpDumpServer, this, nf]()
{
tcpDumpLoop(tcpDumpServer, nf);
});
return true;
}

void Netdump::capture(int netif_idx, const char* data, size_t len, int out, int success)
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2 changes: 1 addition & 1 deletion libraries/Netdump/src/Netdump.h
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Expand Up @@ -53,7 +53,7 @@ class Netdump

void printDump(Print& out, Packet::PacketDetail ndd, const Filter nf = nullptr);
void fileDump(File& outfile, const Filter nf = nullptr);
void tcpDump(WiFiServer &tcpDumpServer, const Filter nf = nullptr);
bool tcpDump(WiFiServer &tcpDumpServer, const Filter nf = nullptr);


private:
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