The regtest framework is local, so often there is no need to
discover our external IP. Setting -discover=0 in util.py works
around shutdown hang caused by GetExternalIP waiting in recv().
An user on IRC reported an issue where `getrawchangeaddress`
keeps returning a single address when the keypool is exhausted.
In my opinion this is strange behaviour.
- Change CReserveKey to fail when running out of keys in the keypool.
- Make `getrawchangeaddress` return RPC_WALLET_KEYPOOL_RAN_OUT when
unable to create an address.
- Add a Python RPC test for checking the keypool behaviour in combination
with encrypted wallets.
This removes some inconsistencies in what worked and didn't work in
safemode. Now only RPCs involved in getting balances or sending
funds are disabled.
Previously you could mine but not submit blocks— but we may need more
blocks to resolve a fork that triggered safe mode in the first place,
and the non-submission was not reliable since some miners submit
blocks via multiple means. There were also a number of random commands
disabled that had nothing to do with the blockchain like verifymessage.
Thanks to earlz for pointing out that there were some moderately cheap
ways to maliciously trigger safe mode, which brought attention to
the fact that safemode wasn't used in a very intelligent way.
This adds a -whitelist option to specify subnet ranges from which peers
that connect are whitelisted. In addition, there is a -whitebind option
which works like -bind, except peers connecting to it are also
whitelisted (allowing a separate listen port for trusted connections).
Being whitelisted has two effects (for now):
* They are immune to DoS disconnection/banning.
* Transactions they broadcast (which are valid) are always relayed,
even if they were already in the mempool. This means that a node
can function as a gateway for a local network, and that rebroadcasts
from the local network will work as expected.
Whitelisting replaces the magic exemption localhost had for DoS
disconnection (local addresses are still never banned, though), which
implied hidden service connects (from a localhost Tor node) were
incorrectly immune to DoS disconnection as well. This old
behaviour is removed for that reason, but can be restored using
-whitelist=127.0.0.1 or -whitelist=::1 can be specified. -whitebind
is safer to use in case non-trusted localhost connections are expected
(like hidden services).
- add a small wrapper in util around RAND_bytes() and replace with
GetRandBytes() in the code to log errors from calling RAND_bytes()
- remove OpenSSL header rand.h where no longer needed
- small changes to Shutdown(), buffer __func__, which is now used in
all LogPrintf() calls and format for better readability
- order using namespace alpabetically
Wladimir J. van der Laan