Start to opentracker's memory requirements

* peer lists for v4 and v6 are now lazily allocated and, more importantly, will be freed once there are no more peers
* The downloaded count is now per torrent and not per peer list anymore, moving in what was alignment loss, anyway
* The (now) per torrent downloaded and the per peer list peer and seed count shrunk from size_t to uint32_t
* A helper guards accesses to the peer and seed count to prevent null pointer dereferences
* The base time also shrank from time_t to uint32_t, minutes since the epoch currently fits in 25 bits

1 files changed, 4 insertions, 4 deletions

diff --git a/src/ot_stats.c b/src/ot_stats.c
index 9901081..c50d4e3 100644
--- a/src/ot_stats.c
+++ b/src/ot_stats.c
@@ -299,8 +299,8 @@ typedef struct {
 static int torrent_statter(ot_torrent *torrent, uintptr_t data) {
   torrent_stats *stats = (torrent_stats *)data;
   stats->torrent_count++;
-  stats->peer_count += torrent->peer_list6->peer_count + torrent->peer_list4->peer_count;
-  stats->seed_count += torrent->peer_list6->seed_count + torrent->peer_list4->seed_count;
+  stats->peer_count += peerlist_peer_count(torrent->peer_list6) + peerlist_peer_count(torrent->peer_list4);
+  stats->seed_count += peerlist_seed_count(torrent->peer_list6) + peerlist_seed_count(torrent->peer_list4);
   return 0;
 }
 
@@ -343,8 +343,8 @@ void stats_top_txt(char **reply, const char *reply_end, size_t amount) {
     ot_vector *torrents_list = mutex_bucket_lock(bucket);
     for (j = 0; j < torrents_list->size; ++j) {
       ot_torrent *torrent     = (ot_torrent *)(torrents_list->data) + j;
-      size_t      peer_count  = torrent->peer_list6->peer_count + torrent->peer_list4->peer_count;
-      size_t      seed_count  = torrent->peer_list6->seed_count + torrent->peer_list4->seed_count;
+      size_t      peer_count  = peerlist_peer_count(torrent->peer_list6) + peerlist_peer_count(torrent->peer_list4);
+      size_t      seed_count  = peerlist_seed_count(torrent->peer_list6) + peerlist_seed_count(torrent->peer_list4);
       size_t      leech_count = peer_count - seed_count;
 
       stats_insert_into_highscore(peer_count,  top100c, amount, &torrent->hash);