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more addr message error checking

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-- version 0.2.11
This commit is contained in:
s_nakamoto
2010-06-15 18:26:32 +00:00
parent 78c7bb8e26
commit d0ac235c8f
4 changed files with 23 additions and 12 deletions
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22
net.h
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@@ -289,16 +289,24 @@ public:
bool IsRoutable() const
{
return !(GetByte(3) == 10 ||
(GetByte(3) == 192 && GetByte(2) == 168) ||
GetByte(3) == 127 ||
GetByte(3) == 0 ||
ip == 0 ||
ip == INADDR_NONE);
return IsValid() &&
!(GetByte(3) == 10 ||
(GetByte(3) == 192 && GetByte(2) == 168) ||
GetByte(3) == 127 ||
GetByte(3) == 0);
}
bool IsValid() const
{
// Clean up 3-byte shifted addresses caused by garbage in size field
// of addr messages from versions before 0.2.9 checksum.
// Two consecutive addr messages look like this:
// header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
// so if the first length field is garbled, it reads the second batch
// of addr misaligned by 3 bytes.
if (memcmp(pchReserved, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
return false;
return (ip != 0 && ip != INADDR_NONE && port != htons(USHRT_MAX));
}
@@ -619,7 +627,7 @@ public:
// Known checking here is only to save space from duplicates.
// SendMessages will filter it again for knowns that were added
// after addresses were pushed.
if (!setAddrKnown.count(addr))
if (addr.IsValid() && !setAddrKnown.count(addr))
vAddrToSend.push_back(addr);
}