server list request:
FF FF FF FF 67 65 74 69 6E 66 6F 20 78 78 78
....getinfo xxx

filter (only one specific here):
FF FF FF FF 67 65 74 73 65 72 76 65 72 73 20 33 20 66 75 6C 6C 20 65 6D 70 74 79
....getservers 3 full empty

server response (only a small part here, what is this for and whats the content?):
FF FF FF FF 67 65 74 73 65 72 76 65 72 73 52 65 73 70 6F 6E 73 65 0A 00 5C D5 72 16 71 71 21 5C D8 F6 31 B7 71 20 5C 42 4F BC E1 71 25 5C CB 74 1C 1C 71 20 5C 40 22 C3 77 71 2A 5C 43 47 19 EB 71 20 5C 45 0C 5E 1E 71 20 5C 55 83 CA 0E 71 16 5C 3E 68 AC 63 71 20 5C 55 EC 65 5F 71 20 5C 4D BB 4D 0D 71 20 5C 55 15 F5 15 71 21 5C 55 83 AA
....getserversResponse..\.r.qq!\..1.q \BO..q%\.t..q \@".wq*\CG..q \E.^.q \U...q.\>h.cq \U.e_q \M.M.q \U...q!\U..
(...)

info response of one server from list:
FF FF FF FF 69 6E 66 6F 52 65 73 70 6F 6E 73 65 0A 5C 63 68 61 6C 6C 65 6E 67 65 5C 78 78 78 5C 70 72 6F 74 6F 63 6F 6C 5C 33 5C 68 6F 73 74 6E 61 6D 65 5C 5E 31 42 5E 37 61 62 79 6C 6F 6E 20 5E 31 65 53 5E 37 70 6F 72 74 73 20 5E 31 7C 7C 7C 5E 37 7C 7C 7C 5E 31 7C 7C 7C 20 5E 37 43 6F 44 34 20 54 44 4D 20 50 75 62 6C 69 63 73 65 72 76 65 72 5C 6D 61 70 6E 61 6D 65 5C 6D 70 5F 63 72 61 73 68 5C 63 6C 69 65 6E 74 73 5C 31 34 5C 73 76 5F 6D 61 78 63 6C 69 65 6E 74 73 5C 31 34 5C 67 61 6D 65 74 79 70 65 5C 77 61 72 5C 70 75 72 65 5C 31 5C 6D 61 78 50 69 6E 67 5C 32 30 30 5C 6B 63 5C 31 5C 68 77 5C 32 5C 6D 6F 64 5C 30 5C 76 6F 69 63 65 5C 30 5C 70 62 5C 31
....infoResponse.\challenge\xxx\protocol\3\hostname\^1B^7abylon ^1eS^7ports ^1|||^7|||^1||| ^7CoD4 TDM Publicserver\mapname\mp_crash\clients\14\sv_maxclients\14\gametype\war\pure\1\maxPing\200\kc\1\hw\2\mod\0\voice\0\pb\1.

key code auth:
....getKeyAuthorize 0 !REMOVEDKEYHERE! PB changed0002597a178c647b5fc48069f

get challenge (master server?):
....getchallenge 0 "changed0002597a178c647b5fc48069f"

keycode in use:
FF FF FF FF 65 72 72 6F 72 0A 45 58 45 5F 45 52 52 5F 43 44 4B 45 59 5F 49 4E 5F 55 53 45
....error.EXE_ERR_CDKEY_IN_USE

get status:
FF FF FF FF 67 65 74 73 74 61 74 75 73
....getstatus

status response (cutted):
....statusResponse.\_Admin\.:MK:.CoD4\_Location\Germany\_Website\http://www.domain.tld\g_compassShowEnemies\0\g_gametype\war\gamename\Call of Duty 4\mapname\mp_overgrown\protocol\3\shortversion\1.4\sv_allowAnonymous\0\sv_disableClientConsole\0\sv_floodprotect\1\sv_hostname\^1Michaels ^3Heaven\sv_maxclients\26\sv_maxPing\0\sv_maxRate\25000\sv_minPing\0\sv_privateClients\6\sv_punkbuster\1\sv_pure\1\sv_voice\0\ui_maxclients\32\pswrd\0\mod\0.70 45 "^4.:MK:.^3CoD4".0 103 "Lara Croft".52 53 "Mario-G".74 113 "=[AGP]=Light62"
(...)