096535292d
The peer top-up loop re-announced to trackers only at the full advertised interval (~30 min), so a torrent that dropped to a handful of peers would sit there for up to half an hour with only the 5-minute DHT refresh to help — looking like the re-announce system was dead. Now, when fewer than LOW_PEER_THRESHOLD (10) peers are connected, the next tracker announce is scheduled at the tracker's min_interval floor (never below 60s) instead of the full interval, so a thin swarm actually tries to recover. Once peers recover the full interval is used again. Capture the tracker's min_interval (was being dropped) to stay announce-compliant. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/* tracker.h — HTTP and UDP tracker announce client.
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*
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* The wire codec (query building, bencode/UDP packet encode+decode) lives in the
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* sibling `torrent-tracker` library; the implementation here (src/discovery)
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* owns only the socket glue. HTTPS/TLS is deferred to a later transport backend;
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* the built-ins are plaintext HTTP and UDP.
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*/
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#ifndef NAUT_TRACKER_H
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#define NAUT_TRACKER_H
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#include "naut/common.h"
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/* IPv4 compact peer (BEP-23). IPv6 (BEP-7) is a later addition. */
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typedef struct { uint8_t ip[4]; uint16_t port; } naut_peer_addr;
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typedef enum {
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NAUT_TEV_NONE = 0, NAUT_TEV_COMPLETED = 1, NAUT_TEV_STARTED = 2, NAUT_TEV_STOPPED = 3
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} naut_tracker_event; /* values match BEP-15 UDP event codes */
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typedef struct {
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uint8_t info_hash[20];
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uint8_t peer_id[20];
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uint16_t port;
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uint64_t uploaded, downloaded, left;
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naut_tracker_event event;
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int32_t numwant; /* -1 for default */
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uint32_t key;
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} naut_announce_req;
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typedef struct {
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int32_t interval;
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int32_t min_interval; /* tracker's floor, 0 if not advertised */
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int32_t seeders, leechers; /* -1 if absent */
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naut_peer_addr *peers;
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size_t num_peers;
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char *failure; /* tracker "failure reason", or NULL */
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} naut_tracker_response;
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void naut_tracker_response_free(naut_tracker_response *r);
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/* Build the full announce GET URL (base?...params) with percent-encoded binary
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* info_hash/peer_id. Returns bytes written (excl NUL) or 0 on overflow. */
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size_t naut_tracker_http_url(const char *base, const naut_announce_req *req,
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char *out, size_t outsz);
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/* --- live fetch helpers (blocking) --- */
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/* HTTP GET the announce URL; fills out. Only http:// (no TLS yet). */
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naut_err naut_tracker_announce_http(const char *url, naut_tracker_response *out);
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/* Full UDP connect+announce handshake against host:port. */
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naut_err naut_tracker_announce_udp(const char *host, uint16_t port,
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const naut_announce_req *req,
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naut_tracker_response *out);
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#endif /* NAUT_TRACKER_H */
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