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more addr message error checking

-- version 0.2.11
0.8
s_nakamoto 15 years ago
parent
commit
d0ac235c8f
  1. 5
      main.cpp
  2. 6
      net.cpp
  3. 22
      net.h
  4. 2
      serialize.h

5
main.cpp

@ -1926,7 +1926,9 @@ bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) @@ -1926,7 +1926,9 @@ bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
{
vector<CAddress> vAddr;
vRecv >> vAddr;
if (vAddr.size() > 50000) // lower this to 1000 later
if (pfrom->nVersion < 200) // don't want addresses from 0.1.5
return true;
if (vAddr.size() > 1000)
return error("message addr size() = %d", vAddr.size());
// Store the new addresses
@ -2311,6 +2313,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle) @@ -2311,6 +2313,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
if (pto->setAddrKnown.insert(addr).second)
{
vAddr.push_back(addr);
// receiver rejects addr messages larger than 1000
if (vAddr.size() >= 1000)
{
pto->PushMessage("addr", vAddr);

6
net.cpp

@ -968,9 +968,9 @@ bool OpenNetworkConnection(const CAddress& addrConnect) @@ -968,9 +968,9 @@ bool OpenNetworkConnection(const CAddress& addrConnect)
if (addrLocalHost.IsRoutable() && !fUseProxy)
{
// Advertise our address
vector<CAddress> vAddrToSend;
vAddrToSend.push_back(addrLocalHost);
pnode->PushMessage("addr", vAddrToSend);
vector<CAddress> vAddr;
vAddr.push_back(addrLocalHost);
pnode->PushMessage("addr", vAddr);
}
// Get as many addresses as we can

22
net.h

@ -289,16 +289,24 @@ public: @@ -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: @@ -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);
}

2
serialize.h

@ -19,7 +19,7 @@ class CScript; @@ -19,7 +19,7 @@ class CScript;
class CDataStream;
class CAutoFile;
static const int VERSION = 210;
static const int VERSION = 211;
static const char* pszSubVer = ".0";

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