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refactor: generalize select logic

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in preparation for consolidating the logic for searching the new and tried
tables, generalize the call paths for both

Co-authored-by: Martin Zumsande <mzumsande@gmail.com>
This commit is contained in:
Amiti Uttarwar 2023-02-18 18:01:18 -07:00
parent 052fbcd5a7
commit ca2a9c5f8f
1 changed files with 15 additions and 6 deletions
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21
src/addrman.cpp
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@ -723,14 +723,17 @@ std::pair<CAddress, NodeSeconds> AddrManImpl::Select_(bool newOnly) const
// Decide if we are going to search the new or tried table
bool search_tried;
int bucket_count;
// Use a 50% chance for choosing between tried and new table entries.
if (!newOnly &&
(nTried > 0 &&
(nNew == 0 || insecure_rand.randbool() == 0))) {
search_tried = true;
bucket_count = ADDRMAN_TRIED_BUCKET_COUNT;
} else {
search_tried = false;
bucket_count = ADDRMAN_NEW_BUCKET_COUNT;
}
if (search_tried) {
@ -738,18 +741,21 @@ std::pair<CAddress, NodeSeconds> AddrManImpl::Select_(bool newOnly) const
double fChanceFactor = 1.0;
while (1) {
// Pick a tried bucket, and an initial position in that bucket.
int nKBucket = insecure_rand.randrange(ADDRMAN_TRIED_BUCKET_COUNT);
int nKBucket = insecure_rand.randrange(bucket_count);
int nKBucketPos = insecure_rand.randrange(ADDRMAN_BUCKET_SIZE);
// Iterate over the positions of that bucket, starting at the initial one,
// and looping around.
int i;
for (i = 0; i < ADDRMAN_BUCKET_SIZE; ++i) {
if (vvTried[nKBucket][(nKBucketPos + i) % ADDRMAN_BUCKET_SIZE] != -1) break;
int position = (nKBucketPos + i) % ADDRMAN_BUCKET_SIZE;
int node_id = GetEntry(search_tried, nKBucket, position);
if (node_id != -1) break;
}
// If the bucket is entirely empty, start over with a (likely) different one.
if (i == ADDRMAN_BUCKET_SIZE) continue;
// Find the entry to return.
int nId = vvTried[nKBucket][(nKBucketPos + i) % ADDRMAN_BUCKET_SIZE];
int position = (nKBucketPos + i) % ADDRMAN_BUCKET_SIZE;
int nId = GetEntry(search_tried, nKBucket, position);
const auto it_found{mapInfo.find(nId)};
assert(it_found != mapInfo.end());
const AddrInfo& info{it_found->second};
@ -766,18 +772,21 @@ std::pair<CAddress, NodeSeconds> AddrManImpl::Select_(bool newOnly) const
double fChanceFactor = 1.0;
while (1) {
// Pick a new bucket, and an initial position in that bucket.
int nUBucket = insecure_rand.randrange(ADDRMAN_NEW_BUCKET_COUNT);
int nUBucket = insecure_rand.randrange(bucket_count);
int nUBucketPos = insecure_rand.randrange(ADDRMAN_BUCKET_SIZE);
// Iterate over the positions of that bucket, starting at the initial one,
// and looping around.
int i;
for (i = 0; i < ADDRMAN_BUCKET_SIZE; ++i) {
if (vvNew[nUBucket][(nUBucketPos + i) % ADDRMAN_BUCKET_SIZE] != -1) break;
int position = (nUBucketPos + i) % ADDRMAN_BUCKET_SIZE;
int node_id = GetEntry(search_tried, nUBucket, position);
if (node_id != -1) break;
}
// If the bucket is entirely empty, start over with a (likely) different one.
if (i == ADDRMAN_BUCKET_SIZE) continue;
// Find the entry to return.
int nId = vvNew[nUBucket][(nUBucketPos + i) % ADDRMAN_BUCKET_SIZE];
int position = (nUBucketPos + i) % ADDRMAN_BUCKET_SIZE;
int nId = GetEntry(search_tried, nUBucket, position);
const auto it_found{mapInfo.find(nId)};
assert(it_found != mapInfo.end());
const AddrInfo& info{it_found->second};