2 * Protocol of online ban list:
5 * GET g_ban_sync_uri?action=ban&hostname=...&ip=xxx.xxx.xxx&duration=nnnn&reason=...................
6 * (IP 1, 2, 3, or 4 octets, 3 octets for example is a /24 mask)
8 * GET g_ban_sync_uri?action=unban&hostname=...&ip=xxx.xxx.xxx
9 * - Querying the ban list
10 * GET g_ban_sync_uri?action=list&hostname=...&servers=xxx.xxx.xxx.xxx;xxx.xxx.xxx.xxx;...
12 * shows the bans from the listed servers, and possibly others.
13 * Format of a ban is ASCII plain text, four lines per ban, delimited by
14 * newline ONLY (no carriage return):
16 * IP address (also 1, 2, 3, or 4 octets, delimited by dot)
17 * time left in seconds
19 * server IP that registered the ban
22 float Ban_Insert(string ip, float bantime, string reason, float dosync);
24 void OnlineBanList_SendBan(string ip, float bantime, string reason)
29 uri = strcat( "action=ban&hostname=", uri_escape(cvar_string("hostname")));
30 uri = strcat(uri, "&ip=", uri_escape(ip));
31 uri = strcat(uri, "&duration=", ftos(bantime));
32 uri = strcat(uri, "&reason=", uri_escape(reason));
34 n = tokenize_console(cvar_string("g_ban_sync_uri"));
35 if(n >= MAX_IPBAN_URIS)
37 for(i = 0; i < n; ++i)
39 if(strstrofs(argv(i), "?", 0) >= 0)
40 uri_get(strcat(argv(i), "&", uri), URI_GET_DISCARD); // 0 = "discard" callback target
42 uri_get(strcat(argv(i), "?", uri), URI_GET_DISCARD); // 0 = "discard" callback target
46 void OnlineBanList_SendUnban(string ip)
51 uri = strcat( "action=unban&hostname=", uri_escape(cvar_string("hostname")));
52 uri = strcat(uri, "&ip=", uri_escape(ip));
54 n = tokenize_console(cvar_string("g_ban_sync_uri"));
55 if(n >= MAX_IPBAN_URIS)
57 for(i = 0; i < n; ++i)
59 if(strstrofs(argv(i), "?", 0) >= 0)
60 uri_get(strcat(argv(i), "&", uri), URI_GET_DISCARD); // 0 = "discard" callback target
62 uri_get(strcat(argv(i), "?", uri), URI_GET_DISCARD); // 0 = "discard" callback target
66 string OnlineBanList_Servers;
67 float OnlineBanList_Timeout;
68 float OnlineBanList_RequestWaiting[MAX_IPBAN_URIS];
70 void OnlineBanList_URI_Get_Callback(float id, float status, string data)
82 if(id >= MAX_IPBAN_URIS)
84 print("Received ban list for invalid ID\n");
88 tokenize_console(cvar_string("g_ban_sync_uri"));
91 print("Received ban list from ", uri, ": ");
93 if(OnlineBanList_RequestWaiting[id] == 0)
95 print("rejected (unexpected)\n");
99 OnlineBanList_RequestWaiting[id] = 0;
101 if(time > OnlineBanList_Timeout)
103 print("rejected (too late)\n");
107 syncinterval = cvar("g_ban_sync_interval");
108 if(syncinterval == 0)
110 print("rejected (syncing disabled)\n");
118 print("error: status is ", ftos(status), "\n");
122 if(substring(data, 0, 1) == "<")
124 print("error: received HTML instead of a ban list\n");
128 if(strstrofs(data, "\r", 0) != -1)
130 print("error: received carriage returns\n");
137 n = tokenizebyseparator(data, "\n");
141 print("error: received invalid item count: ", ftos(n), "\n");
145 print("OK, ", ftos(n / 4), " items\n");
147 for(i = 0; i < n; i += 4)
150 timeleft = stof(argv(i + 1));
151 reason = argv(i + 2);
152 serverip = argv(i + 3);
154 dprint("received ban list item ", ftos(i / 4), ": ip=", ip);
155 dprint(" timeleft=", ftos(timeleft), " reason=", reason);
156 dprint(" serverip=", serverip, "\n");
158 timeleft -= 1.5 * cvar("g_ban_sync_timeout");
163 for(j = 0; j < l; ++j)
164 if(strstrofs("0123456789.", substring(ip, j, 1), 0) == -1)
166 print("Invalid character ", substring(ip, j, 1), " in IP address ", ip, ". Skipping this ban.\n");
170 if(cvar("g_ban_sync_trusted_servers_verify"))
171 if((strstrofs(strcat(";", OnlineBanList_Servers, ";"), strcat(";", serverip, ";"), 0) == -1))
175 timeleft = min(syncinterval + (OnlineBanList_Timeout - time) + 5, timeleft);
176 // the ban will be prolonged on the next sync
177 // or expire 5 seconds after the next timeout
178 Ban_Insert(ip, timeleft, strcat("ban synced from ", serverip, " at ", uri), 0);
179 print("Ban list syncing: accepted ban of ", ip, " by ", serverip, " at ", uri, ": ");
186 void OnlineBanList_Think()
192 if(cvar_string("g_ban_sync_uri") == "")
194 if(cvar("g_ban_sync_interval") == 0) // < 0 is okay, it means "sync on level start only"
196 argc = tokenize_console(cvar_string("g_ban_sync_trusted_servers"));
200 if(OnlineBanList_Servers)
201 strunzone(OnlineBanList_Servers);
202 OnlineBanList_Servers = argv(0);
203 for(i = 1; i < argc; ++i)
204 OnlineBanList_Servers = strcat(OnlineBanList_Servers, ";", argv(i));
205 OnlineBanList_Servers = strzone(OnlineBanList_Servers);
207 uri = strcat( "action=list&hostname=", uri_escape(cvar_string("hostname")));
208 uri = strcat(uri, "&servers=", uri_escape(OnlineBanList_Servers));
210 OnlineBanList_Timeout = time + cvar("g_ban_sync_timeout");
212 n = tokenize_console(cvar_string("g_ban_sync_uri"));
213 if(n >= MAX_IPBAN_URIS)
215 for(i = 0; i < n; ++i)
217 if(OnlineBanList_RequestWaiting[i])
219 OnlineBanList_RequestWaiting[i] = 1;
220 if(strstrofs(argv(i), "?", 0) >= 0)
221 uri_get(strcat(argv(i), "&", uri), URI_GET_IPBAN + i); // 1000 = "banlist" callback target
223 uri_get(strcat(argv(i), "?", uri), URI_GET_IPBAN + i); // 1000 = "banlist" callback target
226 if(cvar("g_ban_sync_interval") > 0)
227 self.nextthink = time + max(60, cvar("g_ban_sync_interval") * 60);
238 string ban_ip[BAN_MAX];
239 float ban_expire[BAN_MAX];
257 for(i = 0; i < ban_count; ++i)
259 if(time > ban_expire[i])
261 out = strcat(out, " ", ban_ip[i]);
262 out = strcat(out, " ", ftos(ban_expire[i] - time));
264 if(strlen(out) <= 1) // no real entries
265 cvar_set("g_banned_list", "");
267 cvar_set("g_banned_list", out);
270 float Ban_Delete(float i)
276 if(ban_expire[i] == 0)
278 if(ban_expire[i] > 0)
280 OnlineBanList_SendUnban(ban_ip[i]);
281 strunzone(ban_ip[i]);
292 for(i = 0; i < ban_count; ++i)
296 n = tokenize_console(cvar_string("g_banned_list"));
297 if(stof(argv(0)) == 1)
299 ban_count = (n - 1) / 2;
300 for(i = 0; i < ban_count; ++i)
302 ban_ip[i] = strzone(argv(2*i+1));
303 ban_expire[i] = time + stof(argv(2*i+2));
309 e.classname = "bansyncer";
310 e.think = OnlineBanList_Think;
311 e.nextthink = time + 1;
318 for(i = 0; i < ban_count; ++i)
320 if(time > ban_expire[i])
322 msg = strcat("#", ftos(i), ": ");
323 msg = strcat(msg, ban_ip[i], " is still banned for ");
324 msg = strcat(msg, ftos(ban_expire[i] - time), " seconds");
329 float Ban_GetClientIP(entity client)
331 // we can't use tokenizing here, as this is called during ban list parsing
332 float i1, i2, i3, i4;
335 s = client.netaddress;
337 i1 = strstrofs(s, ".", 0);
340 i2 = strstrofs(s, ".", i1 + 1);
343 i3 = strstrofs(s, ".", i2 + 1);
346 i4 = strstrofs(s, ".", i3 + 1);
350 ban_ip1 = substring(s, 0, i1);
351 ban_ip2 = substring(s, 0, i2);
352 ban_ip3 = substring(s, 0, i3);
353 ban_ip4 = strcat1(s);
358 float Ban_IsClientBanned(entity client, float idx)
363 if(!Ban_GetClientIP(client))
375 for(i = b; i < e; ++i)
378 if(time > ban_expire[i])
381 if(ban_ip1 == s) return TRUE;
382 if(ban_ip2 == s) return TRUE;
383 if(ban_ip3 == s) return TRUE;
384 if(ban_ip4 == s) return TRUE;
389 float Ban_MaybeEnforceBan(entity client)
391 if(Ban_IsClientBanned(client, -1))
394 s = strcat("^1NOTE:^7 banned client ", client.netaddress, " just tried to enter\n");
402 string Ban_Enforce(float i, string reason)
407 // Enforce our new ban
409 FOR_EACH_REALCLIENT(e)
410 if(Ban_IsClientBanned(e, i))
415 reason = strcat(reason, ": affects ");
417 reason = strcat(reason, ", ");
418 reason = strcat(reason, e.netname);
420 s = strcat(s, "^1NOTE:^7 banned client ", e.netname, "^7 has to go\n");
428 float Ban_Insert(string ip, float bantime, string reason, float dosync)
435 for(i = 0; i < ban_count; ++i)
439 if(time + bantime > ban_expire[i])
441 ban_expire[i] = time + bantime;
442 dprint(ip, "'s ban has been prolonged to ", ftos(bantime), " seconds from now\n");
445 dprint(ip, "'s ban is still active until ", ftos(ban_expire[i] - time), " seconds from now\n");
448 reason = Ban_Enforce(i, reason);
453 if(substring(reason, 0, 1) != "~") // like IRC: unauthenticated banner
454 OnlineBanList_SendBan(ip, bantime, reason);
459 // do we have a free slot?
460 for(i = 0; i < ban_count; ++i)
461 if(time > ban_expire[i])
463 // no free slot? Then look for the one who would get unbanned next
467 bestscore = ban_expire[i];
468 for(j = 1; j < ban_count; ++j)
470 if(ban_expire[j] < bestscore)
473 bestscore = ban_expire[i];
477 // if we replace someone, will we be banned longer than him (so long-term
478 // bans never get overridden by short-term bans)
480 if(ban_expire[i] > time + bantime)
482 print(ip, " could not get banned due to no free ban slot\n");
485 // okay, insert our new victim as i
487 dprint(ip, " has been banned for ", ftos(bantime), " seconds\n");
488 ban_expire[i] = time + bantime;
489 ban_ip[i] = strzone(ip);
490 ban_count = max(ban_count, i + 1);
494 reason = Ban_Enforce(i, reason);
499 if(substring(reason, 0, 1) != "~") // like IRC: unauthenticated banner
500 OnlineBanList_SendBan(ip, bantime, reason);
505 void Ban_KickBanClient(entity client, float bantime, float masksize, string reason)
507 if(!Ban_GetClientIP(client))
509 sprint(client, strcat("Kickbanned: ", reason, "\n"));
517 Ban_Insert(ban_ip1, bantime, reason, 1);
520 Ban_Insert(ban_ip2, bantime, reason, 1);
523 Ban_Insert(ban_ip3, bantime, reason, 1);
526 Ban_Insert(ban_ip4, bantime, reason, 1);
530 * not needed, as we enforce the ban in Ban_Insert anyway
532 sprint(client, strcat("Kickbanned: ", reason, "\n"));
537 float GameCommand_Ban(string command)
547 argc = tokenize_console(command);
548 if(argv(0) == "help")
550 print(" kickban # n m p reason - kickban player n for m seconds, using mask size p (1 to 4)\n");
551 print(" ban ip m reason - ban an IP or range (incomplete IP, like 1.2.3) for m seconds\n");
552 print(" bans - list all existing bans\n");
553 print(" unban n - delete the entry #n from the bans list\n");
556 if(argv(0) == "kickban")
558 #define INITARG(c) reasonarg = c
559 #define GETARG(v,d) if((argc > reasonarg) && ((v = stof(argv(reasonarg))) != 0)) ++reasonarg; else v = d
560 #define RESTARG(v) if(argc > reasonarg) v = substring(command, argv_start_index(reasonarg), strlen(command) - argv_start_index(reasonarg)); else v = ""
563 entno = stof(argv(2));
564 if(entno > maxclients || entno < 1)
566 client = edict_num(entno);
569 GETARG(bantime, cvar("g_ban_default_bantime"));
570 GETARG(masksize, cvar("g_ban_default_masksize"));
573 Ban_KickBanClient(client, bantime, masksize, reason);
577 else if(argv(0) == "ban")
585 GETARG(bantime, cvar("g_ban_default_bantime"));
588 Ban_Insert(ip, bantime, reason, 1);
595 else if(argv(0) == "bans")
600 else if(argv(0) == "unban")