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author | Wladimir J. van der Laan <laanwj@gmail.com> | 2019-03-09 07:08:51 +0100 |
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committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2019-03-09 07:12:17 +0100 |
commit | ff38148808619038e298f15aaead563efe93a995 (patch) | |
tree | 3d3930d14472be3271df69dca164fb9f3ec91a20 /src | |
parent | 12408d33c6ac85522a0751908230cb0f3b4078fc (diff) | |
parent | 20e6ea259b222b10f066f22695a5f56c52071f63 (diff) | |
download | bitcoin-ff38148808619038e298f15aaead563efe93a995.tar.xz |
Merge #15486: [addrman, net] Ensure tried collisions resolve, and allow feeler connections to existing outbound netgroups
20e6ea259b222b10f066f22695a5f56c52071f63 [addrman] Improve collision logging and address nits (Suhas Daftuar)
f71fdda3bc2e7acd2a8b74e882364866b8b0f55b [addrman] Ensure collisions eventually get resolved (Suhas Daftuar)
4991e3c813c9848d3b3957ea3ad433f02fca9e81 [net] feeler connections can be made to outbound peers in same netgroup (Suhas Daftuar)
4d834018e368c3481a5421891395f64aa9002185 [addrman] Improve tried table collision logging (Suhas Daftuar)
Pull request description:
The restriction on outbound peers sharing the same network group is not intended to apply to feeler connections, so fix this.
This fixes an issue where a tried table collision with an entry to a netgroup we already have an outbound connection to could cause feelers to stop working, because the tried collision buffer (`m_tried_collisions`) would never be drained.
Also, ensure that all entries don't linger in `m_tried_collisions` by evicting an old entry if its collisions is unresolved after 40 minutes.
Tree-SHA512: 553fe2b01b82cd7f0f62f90c6781e373455a45b254e3bec085b5e6b16690aa9f3938e8c50e7136f19dafa250ed4578a26227d944b76daf9ce4ef0c75802389b6
Diffstat (limited to 'src')
-rw-r--r-- | src/addrman.cpp | 13 | ||||
-rw-r--r-- | src/addrman.h | 3 | ||||
-rw-r--r-- | src/net.cpp | 10 |
3 files changed, 22 insertions, 4 deletions
diff --git a/src/addrman.cpp b/src/addrman.cpp index 06c342ba73..8a5f78d1c5 100644 --- a/src/addrman.cpp +++ b/src/addrman.cpp @@ -239,7 +239,9 @@ void CAddrMan::Good_(const CService& addr, bool test_before_evict, int64_t nTime // Will moving this address into tried evict another entry? if (test_before_evict && (vvTried[tried_bucket][tried_bucket_pos] != -1)) { - LogPrint(BCLog::ADDRMAN, "Collision inserting element into tried table, moving %s to m_tried_collisions=%d\n", addr.ToString(), m_tried_collisions.size()); + // Output the entry we'd be colliding with, for debugging purposes + auto colliding_entry = mapInfo.find(vvTried[tried_bucket][tried_bucket_pos]); + LogPrint(BCLog::ADDRMAN, "Collision inserting element into tried table (%s), moving %s to m_tried_collisions=%d\n", colliding_entry != mapInfo.end() ? colliding_entry->second.ToString() : "", addr.ToString(), m_tried_collisions.size()); if (m_tried_collisions.size() < ADDRMAN_SET_TRIED_COLLISION_SIZE) { m_tried_collisions.insert(nId); } @@ -561,12 +563,19 @@ void CAddrMan::ResolveCollisions_() // Give address at least 60 seconds to successfully connect if (GetAdjustedTime() - info_old.nLastTry > 60) { - LogPrint(BCLog::ADDRMAN, "Swapping %s for %s in tried table\n", info_new.ToString(), info_old.ToString()); + LogPrint(BCLog::ADDRMAN, "Replacing %s with %s in tried table\n", info_old.ToString(), info_new.ToString()); // Replaces an existing address already in the tried table with the new address Good_(info_new, false, GetAdjustedTime()); erase_collision = true; } + } else if (GetAdjustedTime() - info_new.nLastSuccess > ADDRMAN_TEST_WINDOW) { + // If the collision hasn't resolved in some reasonable amount of time, + // just evict the old entry -- we must not be able to + // connect to it for some reason. + LogPrint(BCLog::ADDRMAN, "Unable to test; replacing %s with %s in tried table anyway\n", info_old.ToString(), info_new.ToString()); + Good_(info_new, false, GetAdjustedTime()); + erase_collision = true; } } else { // Collision is not actually a collision anymore Good_(info_new, false, GetAdjustedTime()); diff --git a/src/addrman.h b/src/addrman.h index 003bd059f8..e54184ce35 100644 --- a/src/addrman.h +++ b/src/addrman.h @@ -166,6 +166,9 @@ public: //! the maximum number of tried addr collisions to store #define ADDRMAN_SET_TRIED_COLLISION_SIZE 10 +//! the maximum time we'll spend trying to resolve a tried table collision, in seconds +static const int64_t ADDRMAN_TEST_WINDOW = 40*60; // 40 minutes + /** * Stochastical (IP) address manager */ diff --git a/src/net.cpp b/src/net.cpp index 87f1ef0577..ccab4a1718 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -1765,9 +1765,15 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect) addr = addrman.Select(fFeeler); } - // if we selected an invalid address, restart - if (!addr.IsValid() || setConnected.count(addr.GetGroup()) || IsLocal(addr)) + // Require outbound connections, other than feelers, to be to distinct network groups + if (!fFeeler && setConnected.count(addr.GetGroup())) { break; + } + + // if we selected an invalid or local address, restart + if (!addr.IsValid() || IsLocal(addr)) { + break; + } // If we didn't find an appropriate destination after trying 100 addresses fetched from addrman, // stop this loop, and let the outer loop run again (which sleeps, adds seed nodes, recalculates |