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Commit | Line | Data |
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5ada3782 | 1 | #include <stdlib.h> |
2129448c | 2 | #include <string.h> |
9097ab05 | 3 | #include <stdio.h> |
5ada3782 CP |
4 | |
5 | #include "../lib/sstring.h" | |
2129448c | 6 | #include "../core/hooks.h" |
45989eab | 7 | #include "../core/nsmalloc.h" |
4ea9375d | 8 | #include "../lib/irc_string.h" |
acd5f58f | 9 | #include "../irc/irc.h" |
5ada3782 CP |
10 | #include "trusts.h" |
11 | ||
12 | trustgroup *tglist; | |
13 | ||
4be1aaf2 CP |
14 | void th_dbupdatecounts(trusthost *); |
15 | void tg_dbupdatecounts(trustgroup *); | |
16 | ||
34e3de85 GB |
17 | static trusthost *th_getnextchildbyhost(trusthost *, trusthost *); |
18 | ||
5ada3782 CP |
19 | void trusts_freeall(void) { |
20 | trustgroup *tg, *ntg; | |
21 | trusthost *th, *nth; | |
22 | ||
23 | for(tg=tglist;tg;tg=ntg) { | |
24 | ntg = tg->next; | |
25 | for(th=tg->hosts;th;th=nth) { | |
26 | nth = th->next; | |
27 | ||
28 | th_free(th); | |
29 | } | |
30 | ||
2ab0a1e7 | 31 | tg_free(tg, 1); |
5ada3782 CP |
32 | } |
33 | ||
34 | tglist = NULL; | |
35 | } | |
36 | ||
37 | trustgroup *tg_getbyid(unsigned int id) { | |
38 | trustgroup *tg; | |
39 | ||
40 | for(tg=tglist;tg;tg=tg->next) | |
41 | if(tg->id == id) | |
42 | return tg; | |
43 | ||
44 | return NULL; | |
45 | } | |
46 | ||
47 | void th_free(trusthost *th) { | |
2ab0a1e7 CP |
48 | triggerhook(HOOK_TRUSTS_LOSTHOST, th); |
49 | ||
45989eab | 50 | nsfree(POOL_TRUSTS, th); |
5ada3782 CP |
51 | } |
52 | ||
34e3de85 GB |
53 | static void th_updatechildren(trusthost *th) { |
54 | trusthost *nth = NULL; | |
55 | ||
56 | th->children = NULL; | |
57 | ||
58 | for(;;) { | |
59 | nth = th_getnextchildbyhost(th, nth); | |
60 | if(!nth) | |
61 | break; | |
62 | ||
63 | nth->nextbychild = th->children; | |
64 | th->children = nth; | |
65 | } | |
66 | } | |
67 | ||
68 | void th_linktree(void) { | |
69 | trustgroup *tg; | |
70 | trusthost *th; | |
71 | ||
72 | /* ugh */ | |
73 | for(tg=tglist;tg;tg=tg->next) | |
74 | for(th=tg->hosts;th;th=th->next) | |
6e6e98da | 75 | th->parent = th_getsmallestsupersetbyhost(&th->ip, th->bits); |
34e3de85 GB |
76 | |
77 | for(tg=tglist;tg;tg=tg->next) | |
78 | for(th=tg->hosts;th;th=th->next) | |
79 | if(th->parent) | |
80 | th_updatechildren(th->parent); | |
81 | } | |
82 | ||
82a316e7 | 83 | trusthost *th_add(trusthost *ith) { |
65f34016 CP |
84 | trusthost *th; |
85 | ||
45989eab | 86 | th = nsmalloc(POOL_TRUSTS, sizeof(trusthost)); |
65f34016 | 87 | if(!th) |
d2c08930 | 88 | return NULL; |
65f34016 | 89 | |
82a316e7 | 90 | memcpy(th, ith, sizeof(trusthost)); |
5ada3782 | 91 | |
1bbe1ac3 | 92 | th->users = NULL; |
1bbe1ac3 CP |
93 | th->count = 0; |
94 | ||
34e3de85 GB |
95 | th->parent = NULL; |
96 | th->children = NULL; | |
97 | ||
98 | th->marker = 0; | |
99 | ||
82a316e7 CP |
100 | th->next = th->group->hosts; |
101 | th->group->hosts = th; | |
5ada3782 | 102 | |
d2c08930 | 103 | return th; |
5ada3782 CP |
104 | } |
105 | ||
2ab0a1e7 CP |
106 | void tg_free(trustgroup *tg, int created) { |
107 | if(created) | |
108 | triggerhook(HOOK_TRUSTS_LOSTGROUP, tg); | |
2129448c | 109 | |
5ada3782 CP |
110 | freesstring(tg->name); |
111 | freesstring(tg->createdby); | |
112 | freesstring(tg->contact); | |
113 | freesstring(tg->comment); | |
45989eab | 114 | nsfree(POOL_TRUSTS, tg); |
5ada3782 CP |
115 | } |
116 | ||
82a316e7 | 117 | trustgroup *tg_add(trustgroup *itg) { |
45989eab | 118 | trustgroup *tg = nsmalloc(POOL_TRUSTS, sizeof(trustgroup)); |
5ada3782 | 119 | if(!tg) |
d2c08930 | 120 | return NULL; |
5ada3782 | 121 | |
82a316e7 CP |
122 | memcpy(tg, itg, sizeof(trustgroup)); |
123 | ||
124 | tg->name = getsstring(tg->name->content, TRUSTNAMELEN); | |
1f685425 | 125 | tg->createdby = getsstring(tg->createdby->content, CREATEDBYLEN); |
82a316e7 CP |
126 | tg->contact = getsstring(tg->contact->content, CONTACTLEN); |
127 | tg->comment = getsstring(tg->comment->content, COMMENTLEN); | |
5ada3782 | 128 | if(!tg->name || !tg->createdby || !tg->contact || !tg->comment) { |
2ab0a1e7 | 129 | tg_free(tg, 0); |
d2c08930 | 130 | return NULL; |
5ada3782 CP |
131 | } |
132 | ||
65f34016 | 133 | tg->hosts = NULL; |
34e3de85 | 134 | tg->marker = 0; |
1bbe1ac3 CP |
135 | tg->count = 0; |
136 | ||
2129448c CP |
137 | memset(tg->exts, 0, sizeof(tg->exts)); |
138 | ||
5ada3782 CP |
139 | tg->next = tglist; |
140 | tglist = tg; | |
141 | ||
2129448c CP |
142 | triggerhook(HOOK_TRUSTS_NEWGROUP, tg); |
143 | ||
d2c08930 | 144 | return tg; |
5ada3782 | 145 | } |
1bbe1ac3 | 146 | |
6e6e98da | 147 | trusthost *th_getbyhost(struct irc_in_addr *ip) { |
1bbe1ac3 | 148 | trustgroup *tg; |
fdcbe91d | 149 | trusthost *th, *result = NULL; |
6e6e98da | 150 | uint32_t bits; |
1bbe1ac3 | 151 | |
fdcbe91d CP |
152 | for(tg=tglist;tg;tg=tg->next) { |
153 | for(th=tg->hosts;th;th=th->next) { | |
6e6e98da GB |
154 | if(ipmask_check(ip, &th->ip, th->bits)) { |
155 | if(!result || (th->bits > bits)) { | |
156 | bits = th->bits; | |
fdcbe91d CP |
157 | result = th; |
158 | } | |
159 | } | |
160 | } | |
161 | } | |
1bbe1ac3 | 162 | |
fdcbe91d | 163 | return result; |
1bbe1ac3 | 164 | } |
4be1aaf2 | 165 | |
6e6e98da | 166 | trusthost *th_getbyhostandmask(struct irc_in_addr *ip, uint32_t bits) { |
d2c08930 CP |
167 | trustgroup *tg; |
168 | trusthost *th; | |
169 | ||
170 | for(tg=tglist;tg;tg=tg->next) | |
171 | for(th=tg->hosts;th;th=th->next) | |
6e6e98da | 172 | if(ipmask_check(ip, &th->ip, 128) && th->bits == bits) |
d2c08930 CP |
173 | return th; |
174 | ||
175 | return NULL; | |
176 | } | |
177 | ||
9097ab05 | 178 | /* returns the ip with the smallest prefix that is still a superset of the given host */ |
6e6e98da | 179 | trusthost *th_getsmallestsupersetbyhost(struct irc_in_addr *ip, uint32_t bits) { |
9097ab05 CP |
180 | trustgroup *tg; |
181 | trusthost *th, *result = NULL; | |
6e6e98da | 182 | uint32_t sbits; |
9097ab05 CP |
183 | |
184 | for(tg=tglist;tg;tg=tg->next) { | |
185 | for(th=tg->hosts;th;th=th->next) { | |
6e6e98da GB |
186 | if(ipmask_check(ip, &th->ip, th->bits)) { |
187 | if((th->bits < bits) && (!result || (th->bits > sbits))) { | |
188 | sbits = th->bits; | |
9097ab05 CP |
189 | result = th; |
190 | } | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | return result; | |
196 | } | |
197 | ||
198 | /* returns the first ip that is a subset it comes across */ | |
6e6e98da | 199 | trusthost *th_getsubsetbyhost(struct irc_in_addr *ip, uint32_t bits) { |
9097ab05 CP |
200 | trustgroup *tg; |
201 | trusthost *th; | |
202 | ||
203 | for(tg=tglist;tg;tg=tg->next) | |
204 | for(th=tg->hosts;th;th=th->next) | |
6e6e98da GB |
205 | if(ipmask_check(ip, &th->ip, th->bits)) |
206 | if(th->bits > bits) | |
9097ab05 CP |
207 | return th; |
208 | ||
209 | return NULL; | |
210 | } | |
211 | ||
34e3de85 GB |
212 | /* NOT reentrant obviously */ |
213 | static trusthost *th_getnextchildbyhost(trusthost *orig, trusthost *th) { | |
214 | if(!th) { | |
215 | trustgroup *tg; | |
216 | ||
217 | tg = tglist; | |
218 | for(tg=tglist;tg;tg=tg->next) { | |
219 | th = tg->hosts; | |
220 | if(th) | |
221 | break; | |
222 | } | |
223 | ||
224 | /* INVARIANT: tg => th */ | |
225 | if(!tg) | |
226 | return NULL; | |
227 | ||
228 | if(th->parent == orig) | |
229 | return th; | |
230 | } | |
231 | ||
232 | for(;;) { | |
233 | if(th->next) { | |
234 | th = th->next; | |
235 | } else { | |
9a9f4372 GB |
236 | trustgroup *tg = th->group; |
237 | ||
238 | do { | |
239 | tg = tg->next; | |
240 | } while (tg && !tg->hosts); | |
241 | ||
242 | if(!tg) | |
34e3de85 | 243 | return NULL; |
9a9f4372 GB |
244 | |
245 | th = tg->hosts; | |
34e3de85 GB |
246 | } |
247 | ||
9a9f4372 | 248 | if(th->parent == orig) |
34e3de85 GB |
249 | return th; |
250 | } | |
251 | } | |
252 | ||
6e6e98da GB |
253 | void th_getsuperandsubsets(struct irc_in_addr *ip, uint32_t bits, trusthost **superset, trusthost **subset) { |
254 | *superset = th_getsmallestsupersetbyhost(ip, bits); | |
255 | *subset = th_getsubsetbyhost(ip, bits); | |
9097ab05 CP |
256 | } |
257 | ||
b9c52ee0 | 258 | void trusts_flush(void (*thflush)(trusthost *), void (*tgflush)(trustgroup *)) { |
4be1aaf2 CP |
259 | trustgroup *tg; |
260 | trusthost *th; | |
acd5f58f | 261 | time_t t = getnettime(); |
4be1aaf2 CP |
262 | |
263 | for(tg=tglist;tg;tg=tg->next) { | |
264 | if(tg->count > 0) | |
265 | tg->lastseen = t; | |
266 | ||
b9c52ee0 | 267 | tgflush(tg); |
4be1aaf2 CP |
268 | |
269 | for(th=tg->hosts;th;th=th->next) { | |
270 | if(th->count > 0) | |
271 | th->lastseen = t; | |
272 | ||
b9c52ee0 | 273 | thflush(th); |
4be1aaf2 CP |
274 | } |
275 | } | |
276 | } | |
4ea9375d CP |
277 | |
278 | trustgroup *tg_strtotg(char *name) { | |
279 | unsigned long id; | |
280 | trustgroup *tg; | |
281 | ||
282 | /* legacy format */ | |
283 | if(name[0] == '#') { | |
73653516 CP |
284 | char *endp; |
285 | id = strtoul(&name[1], &endp, 10); | |
286 | if(!id || *endp) | |
4ea9375d CP |
287 | return NULL; |
288 | ||
73653516 | 289 | return tg_getbyid(id); |
4ea9375d CP |
290 | } |
291 | ||
292 | for(tg=tglist;tg;tg=tg->next) | |
73653516 | 293 | if(!strcmp(name, tg->name->content)) |
4ea9375d CP |
294 | return tg; |
295 | ||
296 | return NULL; | |
297 | } | |
9097ab05 CP |
298 | |
299 | void th_adjusthosts(trusthost *th, trusthost *superset, trusthost *subset) { | |
300 | /* | |
301 | * First and foremost, CIDR doesn't allow hosts to cross boundaries, i.e. everything with a smaller prefix | |
302 | * is entirely contained with the prefix that is one smaller. | |
303 | * e.g. 0.0.0.0/23, 0.0.0.128/23, you can't have a single prefix for 0.0.0.64-0.0.0.192, instead | |
304 | * you have two, 0.0.0.64/26 and 0.0.0.128/26. | |
305 | * | |
306 | * This makes the code MUCH easier as the entire thing is one huge set/tree. | |
307 | * | |
308 | * Four cases here: | |
309 | * 1: host isn't covered by any existing hosts. | |
310 | * 2: host is covered by a less specific one only, e.g. adding 0.0.0.1/32, while 0.0.0.0/24 already exists. | |
311 | * 3: host is covered by a more specific one only, e.g. adding 0.0.0.0/24 while 0.0.0.1/32 already exists | |
312 | * (note there might be more than one more specific host, e.g. 0.0.0.1/32 and 0.0.0.2/32). | |
313 | * 4: covered by more and less specific cases, e.g. adding 0.0.0.0/24 to: { 0.0.0.1/32, 0.0.0.2/32, 0.0.0.0/16 }. | |
314 | * | |
315 | * CASE 1 | |
316 | * ------ | |
317 | * | |
318 | * !superset && !subset | |
319 | * | |
320 | * Scan through the host hash and add any clients which match our host, this is exactly the same as case 3 | |
321 | * but without needing to check (though checking doesn't hurt), so we'll just use the code for that. | |
322 | * | |
323 | * CASE 2 | |
324 | * ------ | |
325 | * | |
326 | * superset && !subset | |
327 | * | |
328 | * We have the less specific host in 'superset', we know it is the only one so pull out clients in it's | |
329 | * ->users list matching our new host. | |
330 | * No need to look for extra hosts in the main nick hash as they're all covered already. | |
331 | * | |
332 | * CASE 3 | |
333 | * ------ | |
334 | * | |
335 | * !superset && subset | |
336 | * | |
337 | * We have one host in 'subset', but there might be more than one, we don't care though! | |
338 | * We can scan the entire host hash and pull out any hosts that match us and don't have | |
339 | * a trust group already, this ignores any with a more specific prefix. | |
340 | * | |
341 | * CASE 4 | |
342 | * ------ | |
343 | * | |
344 | * superset && subset | |
345 | * | |
346 | * Here we first fix up the ones less specific then us, so we just perform what we did for case 2, | |
347 | * then we perform what we did for case 3. | |
348 | * | |
349 | * So in summary: | |
350 | * CASE 1: DO 3 | |
351 | * CASE 2: (work) | |
352 | * CASE 3: (work) | |
353 | * CASE 4: DO 2; DO 3 | |
354 | * Or: | |
355 | * if(2 || 4) : DO 2 | |
356 | * if(1 || 3 || 4): DO 3 | |
357 | */ | |
358 | ||
359 | /* we let the compiler do the boolean minimisation for clarity reasons */ | |
360 | ||
361 | if((superset && !subset) || (superset && subset)) { /* cases 2 and 4 */ | |
362 | nick *np, *nnp; | |
363 | for(np=superset->users;np;np=nnp) { | |
364 | nnp = nextbytrust(np); | |
6e6e98da | 365 | if(ipmask_check(&np->p_nodeaddr, &th->ip, th->bits)) { |
9097ab05 CP |
366 | trusts_lostnick(np, 1); |
367 | trusts_newnick(np, 1); | |
368 | } | |
369 | } | |
370 | } | |
371 | ||
372 | if((!superset && !subset) || (!superset && subset) || (superset && subset)) { /* cases 1, 3 and 4 */ | |
373 | nick *np; | |
374 | int i; | |
375 | ||
376 | for(i=0;i<NICKHASHSIZE;i++) | |
377 | for(np=nicktable[i];np;np=np->next) | |
6e6e98da | 378 | if(!gettrusthost(np) && ipmask_check(&np->p_nodeaddr, &th->ip, th->bits)) |
9097ab05 CP |
379 | trusts_newnick(np, 1); |
380 | } | |
381 | } | |
6ebeb438 | 382 | |
34e3de85 GB |
383 | unsigned int nexttgmarker(void) { |
384 | static unsigned int tgmarker = 0; | |
385 | trustgroup *tg; | |
386 | ||
387 | tgmarker++; | |
388 | if(!tgmarker) { | |
389 | /* If we wrapped to zero, zap the marker on all groups */ | |
390 | for(tg=tglist;tg;tg=tg->next) | |
391 | tg->marker=0; | |
392 | ||
393 | tgmarker++; | |
394 | } | |
395 | ||
396 | return tgmarker; | |
397 | } | |
398 | ||
399 | unsigned int nextthmarker(void) { | |
400 | static unsigned int thmarker = 0; | |
401 | trustgroup *tg; | |
402 | trusthost *th; | |
403 | ||
404 | thmarker++; | |
405 | if(!thmarker) { | |
406 | /* If we wrapped to zero, zap the marker on all hosts */ | |
407 | for(tg=tglist;tg;tg=tg->next) | |
408 | for(th=tg->hosts;th;th=th->next) | |
409 | th->marker=0; | |
410 | ||
411 | thmarker++; | |
412 | } | |
413 | ||
414 | return thmarker; | |
415 | } | |
416 | ||
2ab0a1e7 | 417 | trusthost *th_getbyid(unsigned int id) { |
82a316e7 | 418 | trustgroup *tg; |
2ab0a1e7 | 419 | trusthost *th; |
82a316e7 CP |
420 | |
421 | for(tg=tglist;tg;tg=tg->next) | |
2ab0a1e7 CP |
422 | for(th=tg->hosts;th;th=th->next) |
423 | if(th->id == id) | |
424 | return th; | |
82a316e7 CP |
425 | |
426 | return NULL; | |
427 | } | |
428 | ||
2ab0a1e7 CP |
429 | int tg_modify(trustgroup *oldtg, trustgroup *newtg) { |
430 | trustgroup vnewtg; | |
431 | ||
432 | memcpy(&vnewtg, oldtg, sizeof(trustgroup)); | |
433 | ||
434 | /* unfortunately we can't just memcpy the new one over */ | |
435 | ||
436 | vnewtg.name = getsstring(newtg->name->content, TRUSTNAMELEN); | |
1f685425 | 437 | vnewtg.createdby = getsstring(newtg->createdby->content, CREATEDBYLEN); |
2ab0a1e7 CP |
438 | vnewtg.contact = getsstring(newtg->contact->content, CONTACTLEN); |
439 | vnewtg.comment = getsstring(newtg->comment->content, COMMENTLEN); | |
f803c9ca | 440 | if(!vnewtg.name || !vnewtg.createdby || !vnewtg.contact || !vnewtg.comment) { |
2ab0a1e7 CP |
441 | freesstring(vnewtg.name); |
442 | freesstring(vnewtg.createdby); | |
443 | freesstring(vnewtg.contact); | |
444 | freesstring(vnewtg.comment); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | /* id remains the same, count/hosts/marker/next/exts are ignored */ | |
449 | vnewtg.trustedfor = newtg->trustedfor; | |
450 | vnewtg.mode = newtg->mode; | |
451 | vnewtg.maxperident = newtg->maxperident; | |
452 | vnewtg.maxusage = newtg->maxusage; | |
453 | vnewtg.expires = newtg->expires; | |
454 | vnewtg.lastseen = newtg->lastseen; | |
1f685425 | 455 | vnewtg.lastmaxusereset = newtg->lastmaxusereset; |
2ab0a1e7 CP |
456 | |
457 | memcpy(oldtg, &vnewtg, sizeof(trustgroup)); | |
458 | ||
459 | return 1; | |
460 | } | |
058f68c5 GB |
461 | |
462 | int th_modify(trusthost *oldth, trusthost *newth) { | |
463 | oldth->maxpernode = newth->maxpernode; | |
464 | oldth->nodebits = newth->nodebits; | |
465 | ||
466 | return 1; | |
467 | } | |
468 |