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_fullscrape.c b/src/ot_fullscrape.c
index 52ec480..9fae444 100644
--- a/src/ot_fullscrape.c
+++ b/src/ot_fullscrape.c
@@ -90,9 +90,9 @@ static void fullscrape_write_one( ot_tasktype mode, char **cursor, ot_torrent *t
      exactly that size */
   char       *r          = *cursor;
   const char *r_end      = r + OT_SCRAPE_MAXENTRYLEN;
-  size_t      seed_count = torrent->peer_list6->seed_count + torrent->peer_list4->seed_count;
-  size_t      peer_count = torrent->peer_list6->peer_count + torrent->peer_list4->peer_count;
-  size_t      down_count = torrent->peer_list6->down_count + torrent->peer_list4->down_count;
+  size_t      seed_count = peerlist_seed_count(torrent->peer_list6) + peerlist_seed_count(torrent->peer_list4);
+  size_t      peer_count = peerlist_peer_count(torrent->peer_list6) + peerlist_peer_count(torrent->peer_list4);
+  size_t      down_count = torrent->down_count;
 
   switch (mode & TASK_TASK_MASK) {
   case TASK_FULLSCRAPE:
@@ -131,7 +131,7 @@ static void fullscrape_write_one( ot_tasktype mode, char **cursor, ot_torrent *t
   case TASK_FULLSCRAPE_TRACKERSTATE:
     hex_from_hash(r, *hash);
     r += 2 * sizeof(ot_hash);
-    fmt_append(&r, r_end, ":%zd:%zd\n", (ssize_t)(time_wall_minutes() - time_since_minutes(torrent->peer_list6->base)), down_count);
+    fmt_append(&r, r_end, ":%zd:%zd\n", (ssize_t)(time_wall_minutes() - time_since_minutes(torrent->base)), down_count);
     break;
   }
   *cursor = r;