Flags in Torrent

What are the flags in a Torrent client?

The flags in the Torrent Client (BitTorrent or uTorrent) displays various letters, each carrying a special meaning about the state of the connection.

Meaning of flags in BitTorrent:

    ?: your client unchoked the peer but the peer is not interested
    D: currently downloading from the peer (interested and not choked)
    d: your client wants to download, but peer doesn't want to send (interested and choked)
    E: peer is using Protocol Encryption (all traffic)
    e: peer is using Protocol Encryption (handshake)
    F: peer was involved in a hashfailed piece (not necessarily a bad peer, just involved)
    H: peer was obtained through DHT
    h: peer connection established via UDP hole-punching
    I: peer established an incoming connection
    K: peer unchoked your client, but your client is not interested
    L: peer has been or discovered via Local Peer Discovery
    O: optimistic unchoke
    P: peer is communicating and transporting data over uTP
    S: peer is snubbed
    U: currently uploading to the peer (interested and not choked)
    u: the peer wants your client to upload, but your client doesn't want to (interested and choked)
    X: peer was included in peer lists obtained through Peer Exchange (PEX)

Examples of flags in uTorrent:

1. D HP
2. D HX
3. D HXP
4. D I
5. D IEP
6. D IH
7. D IHE
8. D IHP
9. D IHX
10. D IHXEP
11. D IHXP
12. D IHXPH
13. D IP
14. D IX
15. D IXEP
16. D IXP
17. D X
18. D XEP
19. D XP
20. D XPH
21. DS HXP
22. DS IHP
23. DS X
24. H
25. HP
26. HXP
27. HXEP
28. I
29. IE
30. IH
31. IHP
32. IHX
33. IHXEP
34. IHXEPH
35. IHXP
36. IP
37. IX
38. IXE
39. K IEP
40. P
41. U
42. U H
43. U HXEP
44. U HXP
45. U IEP
46. U IHP
47. U IHX
48. U IHXE
49. U IHXEP
50. U IHXP
51. U IX
52. U IXE
53. U IXEP
54. U IXP
55. U XE
56. U XP
57. UD IHXEP
58. UD IX
59. UO IHXEP
60. UO XE
61. X
62. XE
63. XEP
64. XP