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p2p: ProcessAddrFetch(-seednode) is unnecessary if -connect is specified

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This commit is contained in:
Dhruv Mehta 2020-09-25 12:33:47 -07:00 • committed by dhruv
parent 5974c49f90
commit 2555a3950f
3 changed files with 44 additions and 3 deletions
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7
src/init.cpp
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@ -1799,6 +1799,13 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
if (connect.size() != 1 || connect[0] != "0") {
connOptions.m_specified_outgoing = connect;
}
if (!connOptions.m_specified_outgoing.empty() && !connOptions.vSeedNodes.empty()) {
LogPrintf("-seednode is ignored when -connect is used\n");
}
if (args.IsArgSet("-dnsseed") && args.GetBoolArg("-dnsseed", DEFAULT_DNSSEED) && args.IsArgSet("-proxy")) {
LogPrintf("-dnsseed is ignored when -connect is used and -proxy is specified\n");
}
}
const std::string& i2psam_arg = args.GetArg("-i2psam", "");

8
src/net.cpp
View file

@ -1465,6 +1465,8 @@ void CConnman::ThreadDNSAddressSeed()
}
LogPrintf("Loading addresses from DNS seed %s\n", seed);
// If -proxy is in use, we make an ADDR_FETCH connection to the DNS resolved peer address
// for the base dns seed domain in chainparams
if (HaveNameProxy()) {
AddAddrFetch(seed);
} else {
@ -1486,8 +1488,9 @@ void CConnman::ThreadDNSAddressSeed()
}
addrman.Add(vAdd, resolveSource);
} else {
// We now avoid directly using results from DNS Seeds which do not support service bit filtering,
// instead using them as a addrfetch to get nodes with our desired service bits.
// If the seed does not support a subdomain with our desired service bits,
// we make an ADDR_FETCH connection to the DNS resolved peer address for the
// base dns seed domain in chainparams
AddAddrFetch(seed);
}
}
@ -1583,7 +1586,6 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect)
{
for (int64_t nLoop = 0;; nLoop++)
{
ProcessAddrFetch();
for (const std::string& strAddr : connect)
{
CAddress addr(CService(), NODE_NONE);

32
test/functional/feature_config_args.py
View file

@ -224,11 +224,43 @@ class ConfArgsTest(BitcoinTestFramework):
]):
self.nodes[0].setmocktime(start + 65)
def test_connect_with_seednode(self):
self.log.info('Test -connect with -seednode')
seednode_ignored = ['-seednode is ignored when -connect is used\n']
dnsseed_ignored = ['-dnsseed is ignored when -connect is used and -proxy is specified\n']
addcon_thread_started = ['addcon thread start\n']
self.stop_node(0)
# When -connect is supplied, expanding addrman via getaddr calls to ADDR_FETCH(-seednode)
# nodes is irrelevant and -seednode is ignored.
with self.nodes[0].assert_debug_log(expected_msgs=seednode_ignored):
self.start_node(0, extra_args=['-connect=fakeaddress1', '-seednode=fakeaddress2'])
# With -proxy, an ADDR_FETCH connection is made to a peer that the dns seed resolves to.
# ADDR_FETCH connections are not used when -connect is used.
with self.nodes[0].assert_debug_log(expected_msgs=dnsseed_ignored):
self.restart_node(0, extra_args=['-connect=fakeaddress1', '-dnsseed=1', '-proxy=1.2.3.4'])
# If the user did not disable -dnsseed, but it was soft-disabled because they provided -connect,
# they shouldn't see a warning about -dnsseed being ignored.
with self.nodes[0].assert_debug_log(expected_msgs=addcon_thread_started,
unexpected_msgs=dnsseed_ignored):
self.restart_node(0, extra_args=['-connect=fakeaddress1', '-proxy=1.2.3.4'])
# We have to supply expected_msgs as it's a required argument
# The expected_msg must be something we are confident will be logged after the unexpected_msg
# These cases test for -connect being supplied but only to disable it
for connect_arg in ['-connect=0', '-noconnect']:
with self.nodes[0].assert_debug_log(expected_msgs=addcon_thread_started,
unexpected_msgs=seednode_ignored):
self.restart_node(0, extra_args=[connect_arg, '-seednode=fakeaddress2'])
def run_test(self):
self.test_log_buffer()
self.test_args_log()
self.test_seed_peers()
self.test_networkactive()
self.test_connect_with_seednode()
self.test_config_file_parser()
self.test_invalid_command_line_options()