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CAddrMan: stochastic address manager

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Design goals:
 * Only keep a limited number of addresses around, so that addr.dat does not grow without bound.
 * Keep the address tables in-memory, and occasionally write the table to addr.dat.
 * Make sure no (localized) attacker can fill the entire table with his nodes/addresses.

See comments in addrman.h for more detailed information.
This commit is contained in:
Pieter Wuille
2012-01-04 23:39:45 +01:00
parent 8c12851ed4
commit 5fee401fe1
17 changed files with 1180 additions and 249 deletions
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13
src/netbase.cpp
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@@ -519,15 +519,22 @@ bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
std::vector<unsigned char> CNetAddr::GetGroup() const
{
std::vector<unsigned char> vchRet;
int nClass = 0; // 0=IPv6, 1=IPv4, 255=unroutable
int nClass = 0; // 0=IPv6, 1=IPv4, 254=local, 255=unroutable
int nStartByte = 0;
int nBits = 16;
// for unroutable addresses, each address is considered different
// all local addresses belong to the same group
if (IsLocal())
{
nClass = 254;
nBits = 0;
}
// all unroutable addresses belong to the same group
if (!IsRoutable())
{
nClass = 255;
nBits = 128;
nBits = 0;
}
// for IPv4 addresses, '1' + the 16 higher-order bits of the IP
// includes mapped IPv4, SIIT translated IPv4, and the well-known prefix