4 #include "autocvars.qh"
5 #include "command/banning.qh"
7 #include "../common/constants.qh"
8 #include "../common/util.qh"
11 * Protocol of online ban list:
14 * GET g_ban_sync_uri?action=ban&hostname=...&ip=xxx.xxx.xxx&duration=nnnn&reason=...................
15 * (IP 1, 2, 3, or 4 octets, 3 octets for example is a /24 mask)
17 * GET g_ban_sync_uri?action=unban&hostname=...&ip=xxx.xxx.xxx
18 * - Querying the ban list
19 * GET g_ban_sync_uri?action=list&hostname=...&servers=xxx.xxx.xxx.xxx;xxx.xxx.xxx.xxx;...
21 * shows the bans from the listed servers, and possibly others.
22 * Format of a ban is ASCII plain text, four lines per ban, delimited by
23 * newline ONLY (no carriage return):
25 * IP address (also 1, 2, 3, or 4 octets, delimited by dot)
26 * time left in seconds
28 * server IP that registered the ban
31 #define MAX_IPBAN_URIS (URI_GET_IPBAN_END - URI_GET_IPBAN + 1)
33 float Ban_Insert(string ip, float bantime, string reason, float dosync);
35 void OnlineBanList_SendBan(string ip, float bantime, string reason)
40 uri = strcat( "action=ban&hostname=", uri_escape(autocvar_hostname));
41 uri = strcat(uri, "&ip=", uri_escape(ip));
42 uri = strcat(uri, "&duration=", ftos(bantime));
43 uri = strcat(uri, "&reason=", uri_escape(reason));
45 n = tokenize_console(autocvar_g_ban_sync_uri);
46 if(n >= MAX_IPBAN_URIS)
48 for(i = 0; i < n; ++i)
50 if(strstrofs(argv(i), "?", 0) >= 0)
51 uri_get(strcat(argv(i), "&", uri), URI_GET_DISCARD); // 0 = "discard" callback target
53 uri_get(strcat(argv(i), "?", uri), URI_GET_DISCARD); // 0 = "discard" callback target
57 void OnlineBanList_SendUnban(string ip)
62 uri = strcat( "action=unban&hostname=", uri_escape(autocvar_hostname));
63 uri = strcat(uri, "&ip=", uri_escape(ip));
65 n = tokenize_console(autocvar_g_ban_sync_uri);
66 if(n >= MAX_IPBAN_URIS)
68 for(i = 0; i < n; ++i)
70 if(strstrofs(argv(i), "?", 0) >= 0)
71 uri_get(strcat(argv(i), "&", uri), URI_GET_DISCARD); // 0 = "discard" callback target
73 uri_get(strcat(argv(i), "?", uri), URI_GET_DISCARD); // 0 = "discard" callback target
77 string OnlineBanList_Servers;
78 float OnlineBanList_Timeout;
79 float OnlineBanList_RequestWaiting[MAX_IPBAN_URIS];
81 void OnlineBanList_URI_Get_Callback(float id, float status, string data)
93 if(id >= MAX_IPBAN_URIS)
95 LOG_INFO("Received ban list for invalid ID\n");
99 tokenize_console(autocvar_g_ban_sync_uri);
102 LOG_INFO("Received ban list from ", uri, ": ");
104 if(OnlineBanList_RequestWaiting[id] == 0)
106 LOG_INFO("rejected (unexpected)\n");
110 OnlineBanList_RequestWaiting[id] = 0;
112 if(time > OnlineBanList_Timeout)
114 LOG_INFO("rejected (too late)\n");
118 syncinterval = autocvar_g_ban_sync_interval;
119 if(syncinterval == 0)
121 LOG_INFO("rejected (syncing disabled)\n");
129 LOG_INFO("error: status is ", ftos(status), "\n");
133 if(substring(data, 0, 1) == "<")
135 LOG_INFO("error: received HTML instead of a ban list\n");
139 if(strstrofs(data, "\r", 0) != -1)
141 LOG_INFO("error: received carriage returns\n");
148 n = tokenizebyseparator(data, "\n");
152 LOG_INFO("error: received invalid item count: ", ftos(n), "\n");
156 LOG_INFO("OK, ", ftos(n / 4), " items\n");
158 for(i = 0; i < n; i += 4)
161 timeleft = stof(argv(i + 1));
162 reason = argv(i + 2);
163 serverip = argv(i + 3);
165 LOG_TRACE("received ban list item ", ftos(i / 4), ": ip=", ip);
166 LOG_TRACE(" timeleft=", ftos(timeleft), " reason=", reason);
167 LOG_TRACE(" serverip=", serverip, "\n");
169 timeleft -= 1.5 * autocvar_g_ban_sync_timeout;
174 if(l != 44) // length 44 is a cryptographic ID
176 for(j = 0; j < l; ++j)
177 if(strstrofs("0123456789.", substring(ip, j, 1), 0) == -1)
179 LOG_INFO("Invalid character ", substring(ip, j, 1), " in IP address ", ip, ". Skipping this ban.\n");
184 if(autocvar_g_ban_sync_trusted_servers_verify)
185 if((strstrofs(strcat(";", OnlineBanList_Servers, ";"), strcat(";", serverip, ";"), 0) == -1))
189 timeleft = min(syncinterval + (OnlineBanList_Timeout - time) + 5, timeleft);
190 // the ban will be prolonged on the next sync
191 // or expire 5 seconds after the next timeout
192 Ban_Insert(ip, timeleft, strcat("ban synced from ", serverip, " at ", uri), 0);
193 LOG_INFO("Ban list syncing: accepted ban of ", ip, " by ", serverip, " at ", uri, ": ");
194 LOG_INFO(reason, "\n");
200 void OnlineBanList_Think()
206 if(autocvar_g_ban_sync_uri == "")
208 if(autocvar_g_ban_sync_interval == 0) // < 0 is okay, it means "sync on level start only"
210 argc = tokenize_console(autocvar_g_ban_sync_trusted_servers);
214 if(OnlineBanList_Servers)
215 strunzone(OnlineBanList_Servers);
216 OnlineBanList_Servers = argv(0);
217 for(i = 1; i < argc; ++i)
218 OnlineBanList_Servers = strcat(OnlineBanList_Servers, ";", argv(i));
219 OnlineBanList_Servers = strzone(OnlineBanList_Servers);
221 uri = strcat( "action=list&hostname=", uri_escape(autocvar_hostname));
222 uri = strcat(uri, "&servers=", uri_escape(OnlineBanList_Servers));
224 OnlineBanList_Timeout = time + autocvar_g_ban_sync_timeout;
226 n = tokenize_console(autocvar_g_ban_sync_uri);
227 if(n >= MAX_IPBAN_URIS)
229 for(i = 0; i < n; ++i)
231 if(OnlineBanList_RequestWaiting[i])
233 OnlineBanList_RequestWaiting[i] = 1;
234 if(strstrofs(argv(i), "?", 0) >= 0)
235 uri_get(strcat(argv(i), "&", uri), URI_GET_IPBAN + i); // 1000 = "banlist" callback target
237 uri_get(strcat(argv(i), "?", uri), URI_GET_IPBAN + i); // 1000 = "banlist" callback target
240 if(autocvar_g_ban_sync_interval > 0)
241 self.nextthink = time + max(60, autocvar_g_ban_sync_interval * 60);
250 const float BAN_MAX = 256;
252 string ban_ip[BAN_MAX];
253 float ban_expire[BAN_MAX];
272 for(i = 0; i < ban_count; ++i)
274 if(time > ban_expire[i])
276 out = strcat(out, " ", ban_ip[i]);
277 out = strcat(out, " ", ftos(ban_expire[i] - time));
279 if(strlen(out) <= 1) // no real entries
280 cvar_set("g_banned_list", "");
282 cvar_set("g_banned_list", out);
285 float Ban_Delete(float i)
291 if(ban_expire[i] == 0)
293 if(ban_expire[i] > 0)
295 OnlineBanList_SendUnban(ban_ip[i]);
296 strunzone(ban_ip[i]);
307 for(i = 0; i < ban_count; ++i)
311 n = tokenize_console(autocvar_g_banned_list);
312 if(stof(argv(0)) == 1)
314 ban_count = (n - 1) / 2;
315 for(i = 0; i < ban_count; ++i)
317 ban_ip[i] = strzone(argv(2*i+1));
318 ban_expire[i] = time + stof(argv(2*i+2));
324 e.classname = "bansyncer";
325 e.think = OnlineBanList_Think;
326 e.nextthink = time + 1;
334 LOG_INFO("^2Listing all existing active bans:\n");
337 for(i = 0; i < ban_count; ++i)
339 if(time > ban_expire[i])
342 ++n; // total number of existing bans
344 msg = strcat("#", ftos(i), ": ");
345 msg = strcat(msg, ban_ip[i], " is still banned for ");
346 msg = strcat(msg, ftos(ban_expire[i] - time), " seconds");
348 LOG_INFO(" ", msg, "\n");
351 LOG_INFO("^2Done listing all active (", ftos(n), ") bans.\n");
354 float Ban_GetClientIP(entity client)
356 // we can't use tokenizing here, as this is called during ban list parsing
357 float i1, i2, i3, i4;
360 if(client.crypto_idfp_signed)
361 ban_idfp = client.crypto_idfp;
363 ban_idfp = string_null;
365 s = client.netaddress;
367 i1 = strstrofs(s, ".", 0);
370 i2 = strstrofs(s, ".", i1 + 1);
373 i3 = strstrofs(s, ".", i2 + 1);
376 i4 = strstrofs(s, ".", i3 + 1);
378 s = substring(s, 0, i4);
380 ban_ip1 = substring(s, 0, i1); // 8
381 ban_ip2 = substring(s, 0, i2); // 16
382 ban_ip3 = substring(s, 0, i3); // 24
383 ban_ip4 = strcat1(s); // 32
387 i1 = strstrofs(s, ":", 0);
390 i1 = strstrofs(s, ":", i1 + 1);
393 i2 = strstrofs(s, ":", i1 + 1);
396 i3 = strstrofs(s, ":", i2 + 1);
400 ban_ip1 = strcat(substring(s, 0, i1), "::/32"); // 32
401 ban_ip2 = strcat(substring(s, 0, i2), "::/48"); // 48
402 ban_ip4 = strcat(substring(s, 0, i3), "::/64"); // 64
404 if(i3 - i2 > 3) // means there is more than 2 digits and a : in the range
405 ban_ip3 = strcat(substring(s, 0, i2), ":", substring(s, i2 + 1, i3 - i2 - 3), "00::/56");
407 ban_ip3 = strcat(substring(s, 0, i2), ":0::/56");
412 float Ban_IsClientBanned(entity client, float idx)
414 float i, b, e, ipbanned;
417 if(!Ban_GetClientIP(client))
430 for(i = b; i < e; ++i)
433 if(time > ban_expire[i])
436 if(ban_ip1 == s) ipbanned = true;
437 if(ban_ip2 == s) ipbanned = true;
438 if(ban_ip3 == s) ipbanned = true;
439 if(ban_ip4 == s) ipbanned = true;
440 if(ban_idfp == s) return true;
444 if(!autocvar_g_banned_list_idmode)
452 float Ban_MaybeEnforceBan(entity client)
454 if(Ban_IsClientBanned(client, -1))
457 s = strcat("^1NOTE:^7 banned client ", client.netaddress, " just tried to enter\n");
466 float Ban_MaybeEnforceBanOnce(entity client)
468 if(client.ban_checked)
470 client.ban_checked = true;
471 return Ban_MaybeEnforceBan(client);
474 string Ban_Enforce(float i, string reason)
479 // Enforce our new ban
481 FOR_EACH_CLIENTSLOT(e)
482 if (IS_REAL_CLIENT(e))
483 if(Ban_IsClientBanned(e, i))
488 reason = strcat(reason, ": affects ");
490 reason = strcat(reason, ", ");
491 reason = strcat(reason, e.netname);
493 s = strcat(s, "^1NOTE:^7 banned client ", e.netaddress, "^7 has to go\n");
501 float Ban_Insert(string ip, float bantime, string reason, float dosync)
508 for(i = 0; i < ban_count; ++i)
512 if(time + bantime > ban_expire[i])
514 ban_expire[i] = time + bantime;
515 LOG_TRACE(ip, "'s ban has been prolonged to ", ftos(bantime), " seconds from now\n");
518 LOG_TRACE(ip, "'s ban is still active until ", ftos(ban_expire[i] - time), " seconds from now\n");
521 reason = Ban_Enforce(i, reason);
526 if(substring(reason, 0, 1) != "~") // like IRC: unauthenticated banner
527 OnlineBanList_SendBan(ip, bantime, reason);
532 // do we have a free slot?
533 for(i = 0; i < ban_count; ++i)
534 if(time > ban_expire[i])
536 // no free slot? Then look for the one who would get unbanned next
540 bestscore = ban_expire[i];
541 for(j = 1; j < ban_count; ++j)
543 if(ban_expire[j] < bestscore)
546 bestscore = ban_expire[i];
550 // if we replace someone, will we be banned longer than him (so long-term
551 // bans never get overridden by short-term bans)
553 if(ban_expire[i] > time + bantime)
555 LOG_INFO(ip, " could not get banned due to no free ban slot\n");
558 // okay, insert our new victim as i
560 LOG_TRACE(ip, " has been banned for ", ftos(bantime), " seconds\n");
561 ban_expire[i] = time + bantime;
562 ban_ip[i] = strzone(ip);
563 ban_count = max(ban_count, i + 1);
567 reason = Ban_Enforce(i, reason);
572 if(substring(reason, 0, 1) != "~") // like IRC: unauthenticated banner
573 OnlineBanList_SendBan(ip, bantime, reason);
578 void Ban_KickBanClient(entity client, float bantime, float masksize, string reason)
581 if(!Ban_GetClientIP(client))
583 sprint(client, strcat("Kickbanned: ", reason, "\n"));
592 ip = strcat1(ban_ip1);
595 ip = strcat1(ban_ip2);
598 ip = strcat1(ban_ip3);
602 ip = strcat1(ban_ip4);
606 id = strcat1(ban_idfp);
610 Ban_Insert(ip, bantime, reason, 1);
612 Ban_Insert(id, bantime, reason, 1);
614 * not needed, as we enforce the ban in Ban_Insert anyway
616 sprint(client, strcat("Kickbanned: ", reason, "\n"));