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c86edd1d Q |
1 | /* nickhandlers.c */ |
2 | ||
3 | #include "nick.h" | |
4 | #include "../lib/flags.h" | |
5 | #include "../lib/irc_string.h" | |
6 | #include "../lib/base64.h" | |
7 | #include "../irc/irc.h" | |
8 | #include "../irc/irc_config.h" | |
9 | #include "../core/error.h" | |
10 | #include "../core/hooks.h" | |
11 | #include "../lib/sstring.h" | |
12 | #include "../server/server.h" | |
13 | #include "../parser/parser.h" | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | ||
17 | /* | |
18 | * handlenickmsg: | |
19 | * Handle new nicks being introduced to the network. | |
20 | * Handle renames. | |
21 | */ | |
22 | ||
23 | int handlenickmsg(void *source, int cargc, char **cargv) { | |
24 | char *sender=(char *)source; | |
25 | time_t timestamp; | |
26 | nick *np,*np2; | |
27 | nick **nh; | |
28 | char *fakehost; | |
29 | char *accountts; | |
30 | ||
31 | if (cargc==2) { /* rename */ | |
32 | /* Nyklon 1017697578 */ | |
33 | timestamp=strtol(cargv[1],NULL,10); | |
34 | np=getnickbynumericstr(sender); | |
35 | if (np==NULL) { | |
36 | Error("nick",ERR_ERROR,"Rename from non-existent sender %s",sender); | |
37 | return CMD_OK; | |
38 | } | |
39 | np2=getnickbynick(cargv[0]); | |
40 | if (np==np2) { | |
41 | /* The new and old nickname have the same hash, this means a rename to the same name in | |
42 | * different case, e.g. Flash -> flash. In this case the timestamp for the change should | |
43 | * match the existing timestamp, and we can bypass all the collision checking and hash fettling. */ | |
44 | if (np->timestamp!=timestamp) { | |
45 | Error("nick",ERR_WARNING,"Rename to same nickname with different timestamp (%s(%d) -> %s(%d))", | |
46 | np->nick,np->timestamp,cargv[0],timestamp); | |
47 | np->timestamp=timestamp; | |
48 | } | |
49 | strncpy(np->nick,cargv[0],NICKLEN); | |
50 | np->nick[NICKLEN]='\0'; | |
51 | triggerhook(HOOK_NICK_RENAME,np); | |
52 | return CMD_OK; | |
53 | } | |
54 | if (np2!=NULL) { | |
55 | /* Nick collision */ | |
56 | if (ircd_strcmp(np->ident,np2->ident) || (np->host!=np2->host)) { | |
57 | /* Different user@host */ | |
58 | if (np2->timestamp < timestamp) { | |
59 | /* The nick attempting to rename got killed. Guess we don't need to do the rename now :) */ | |
60 | deletenick(np); | |
61 | return CMD_OK; | |
62 | } else { | |
63 | /* The other nick got killed */ | |
64 | deletenick(np2); | |
65 | } | |
66 | } else { | |
67 | if (np2->timestamp < timestamp) { | |
68 | /* Same user@host: reverse logic. Whose idea was all this anyway? */ | |
69 | deletenick(np2); | |
70 | } else { | |
71 | deletenick(np); | |
72 | return CMD_OK; | |
73 | } | |
74 | } | |
75 | } | |
76 | /* OK, we've survived the collision hazard. Change timestamp and rename */ | |
77 | np->timestamp=timestamp; | |
78 | removenickfromhash(np); | |
79 | strncpy(np->nick,cargv[0],NICKLEN); | |
80 | np->nick[NICKLEN]='\0'; | |
81 | addnicktohash(np); | |
82 | triggerhook(HOOK_NICK_RENAME,np); | |
83 | } else if (cargc>=8) { /* new nick */ | |
84 | /* Jupiler 2 1016645147 ~Jupiler www.iglobal.be +ir moo [FUTURE CRAP HERE] DV74O] BNBd7 :Jupiler */ | |
85 | timestamp=strtol(cargv[2],NULL,10); | |
86 | np=getnickbynick(cargv[0]); | |
87 | if (np!=NULL) { | |
88 | /* Nick collision */ | |
89 | if (ircd_strcmp(np->ident,cargv[3]) || ircd_strcmp(np->host->name->content,cargv[4])) { | |
90 | /* Different user@host */ | |
91 | if (timestamp>np->timestamp) { | |
92 | /* New nick is newer. Ignore this nick message */ | |
93 | return CMD_OK; | |
94 | } else { | |
95 | /* New nick is older. Kill the imposter, and drop through */ | |
96 | deletenick(np); | |
97 | } | |
98 | } else { | |
99 | if (timestamp>np->timestamp) { | |
100 | /* Same user@host, newer timestamp: we're killing off a ghost */ | |
101 | deletenick(np); | |
102 | } else { | |
103 | /* This nick is the ghost, so ignore it */ | |
104 | return CMD_OK; | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | nh=gethandlebynumeric(numerictolong(cargv[cargc-2],5)); | |
110 | if (!nh) { | |
111 | /* This isn't a valid numeric */ | |
112 | Error("nick",ERR_WARNING,"Received NICK with invalid numeric %s from %s.",cargv[cargc-2],sender); | |
113 | return CMD_ERROR; | |
114 | } | |
115 | ||
116 | /* At this stage the nick is cleared to proceed */ | |
117 | np=newnick(); | |
118 | strncpy(np->nick,cargv[0],NICKLEN); | |
119 | np->nick[NICKLEN]='\0'; | |
120 | np->numeric=numerictolong(cargv[cargc-2],5); | |
121 | strncpy(np->ident,cargv[3],USERLEN); | |
122 | np->ident[USERLEN]='\0'; | |
123 | np->host=findorcreatehost(cargv[4]); | |
124 | np->realname=findorcreaterealname(cargv[cargc-1]); | |
125 | np->nextbyhost=np->host->nicks; | |
126 | np->host->nicks=np; | |
127 | np->nextbyrealname=np->realname->nicks; | |
128 | np->realname->nicks=np; | |
129 | np->timestamp=timestamp; | |
130 | np->ipaddress=numerictolong(cargv[cargc-3],6); | |
131 | np->shident=NULL; | |
132 | np->sethost=NULL; | |
133 | np->umodes=0; | |
134 | np->marker=0; | |
135 | memset(np->exts, 0, MAXNICKEXTS * sizeof(void *)); | |
136 | np->authname[0]='\0'; | |
137 | if(cargc>=9) { | |
138 | setflags(&(np->umodes),UMODE_ALL,cargv[5],umodeflags,REJECT_NONE); | |
139 | if (IsAccount(np)) { | |
140 | if ((accountts=strchr(cargv[6],':'))) { | |
141 | *accountts++='\0'; | |
142 | np->accountts=strtoul(accountts,NULL,10); | |
143 | } else { | |
144 | np->accountts=0; | |
145 | } | |
146 | strncpy(np->authname,cargv[6],ACCOUNTLEN); | |
147 | np->authname[ACCOUNTLEN]='\0'; | |
148 | } | |
149 | if (IsSetHost(np) && (fakehost=strchr(cargv[cargc-4],'@'))) { | |
150 | /* valid sethost */ | |
151 | *fakehost++='\0'; | |
152 | np->shident=getsstring(cargv[cargc-4],USERLEN); | |
153 | np->sethost=getsstring(fakehost,HOSTLEN); | |
154 | } | |
155 | } | |
156 | ||
157 | /* Place this nick in the server nick table. Note that nh is valid from the numeric check above */ | |
158 | if (*nh) { | |
159 | /* There was a nick there already -- we have a masked numeric collision | |
160 | * This shouldn't happen, but if it does the newer nick takes precedence | |
161 | * (the two nicks are from the same server, and if the server has reissued | |
162 | * the masked numeric it must believe the old user no longer exists). | |
163 | */ | |
164 | Error("nick",ERR_ERROR,"Masked numeric collision for %s [%s vs %s]",cargv[0],cargv[cargc-2],longtonumeric((*nh)->numeric,5)); | |
165 | deletenick(*nh); | |
166 | } | |
167 | *nh=np; | |
168 | ||
169 | /* And the nick hash table */ | |
170 | addnicktohash(np); | |
171 | ||
172 | /* Trigger the hook */ | |
173 | triggerhook(HOOK_NICK_NEWNICK,np); | |
174 | } else { | |
175 | Error("nick",ERR_WARNING,"Nick message with weird number of parameters (%d)",cargc); | |
176 | } | |
177 | ||
178 | return CMD_OK; | |
179 | } | |
180 | ||
181 | int handlequitmsg(void *source, int cargc, char **cargv) { | |
182 | nick *np; | |
183 | void *harg[2]; | |
184 | ||
185 | if (cargc>1) { | |
186 | harg[1]=(void *)cargv[1]; | |
187 | } else { | |
188 | harg[1]=""; | |
189 | } | |
190 | ||
191 | np=getnickbynumericstr((char *)source); | |
192 | if (np) { | |
193 | harg[0]=(void *)np; | |
194 | triggerhook(HOOK_NICK_QUIT, harg); | |
195 | deletenick(np); | |
196 | } else { | |
197 | Error("nick",ERR_WARNING,"Quit from non-existant numeric %s",(char *)source); | |
198 | } | |
199 | return CMD_OK; | |
200 | } | |
201 | ||
202 | int handlekillmsg(void *source, int cargc, char **cargv) { | |
203 | nick *np; | |
204 | ||
205 | if (cargc<1) { | |
206 | Error("nick",ERR_WARNING,"Kill message with too few parameters"); | |
207 | return CMD_ERROR; | |
208 | } | |
209 | np=getnickbynumericstr(cargv[0]); | |
210 | if (np) { | |
211 | deletenick(np); | |
212 | } else { | |
213 | Error("nick",ERR_WARNING,"Kill for non-existant numeric %s",cargv[0]); | |
214 | } | |
215 | return CMD_OK; | |
216 | } | |
217 | ||
218 | int handleusermodemsg(void *source, int cargc, char **cargv) { | |
219 | nick *np; | |
220 | flag_t oldflags; | |
221 | char *fakehost; | |
222 | ||
223 | if (cargc<2) { | |
224 | Error("nick",ERR_WARNING,"Mode message with too few parameters"); | |
225 | return CMD_LAST; /* With <2 params the channels module won't want it either */ | |
226 | } | |
227 | ||
228 | if (cargv[0][0]=='#') { | |
229 | /* Channel mode change, we don't care. | |
230 | * We don't bother checking for other channel types here, since & channel mode | |
231 | * changes aren't broadcast and + channels don't have mode changes :) */ | |
232 | return CMD_OK; | |
233 | } | |
234 | ||
235 | np=getnickbynumericstr((char *)source); | |
236 | if (np!=NULL) { | |
237 | if (ircd_strcmp(cargv[0],np->nick)) { | |
238 | Error("nick",ERR_WARNING,"Attempted mode change on user %s by %s",cargv[0],np->nick); | |
239 | return CMD_OK; | |
240 | } | |
241 | oldflags=np->umodes; | |
3e3692bf CP |
242 | if (strchr(cargv[1],'o')) { |
243 | void *harg[2]; | |
244 | harg[0]=np; | |
245 | harg[1]=cargv[1]; | |
246 | triggerhook(HOOK_NICK_MODEOPER,harg); | |
247 | } | |
c86edd1d Q |
248 | setflags(&(np->umodes),UMODE_ALL,cargv[1],umodeflags,REJECT_NONE); |
249 | if (strchr(cargv[1],'h')) { /* Have to allow +h twice.. */ | |
250 | /* +-h: just the freesstring() calls for the -h case */ | |
251 | freesstring(np->shident); /* freesstring(NULL) is OK */ | |
252 | freesstring(np->sethost); | |
253 | np->shident=NULL; | |
254 | np->sethost=NULL; | |
255 | if (IsSetHost(np) && cargc>2) { /* +h and mask received */ | |
256 | if ((fakehost=strchr(cargv[2],'@'))) { | |
257 | /* user@host change */ | |
258 | *fakehost++='\0'; | |
259 | np->shident=getsstring(cargv[2],USERLEN); | |
260 | np->sethost=getsstring(fakehost,HOSTLEN); | |
261 | } else { | |
262 | np->sethost=getsstring(cargv[2],HOSTLEN); | |
263 | } | |
264 | } | |
265 | triggerhook(HOOK_NICK_SETHOST, (void *)np); | |
266 | } | |
267 | } else { | |
268 | Error("nick",ERR_WARNING,"Usermode change by unknown user %s",(char *)source); | |
269 | } | |
270 | return CMD_OK; | |
271 | } | |
272 | ||
273 | int handlewhoismsg(void *source, int cargc, char **cargv) { | |
274 | nick *sender,*target; | |
275 | nick *nicks[2]; | |
276 | ||
277 | if (cargc<2) | |
278 | return CMD_OK; | |
279 | ||
280 | if (strncmp(cargv[0],mynumeric->content,2)) { | |
281 | return CMD_OK; | |
282 | } | |
283 | ||
284 | /* Find the sender... */ | |
285 | if ((sender=getnickbynumericstr((char *)source))==NULL) { | |
286 | Error("localuser",ERR_WARNING,"WHOIS message from non existent numeric %s",(char *)source); | |
287 | return CMD_OK; | |
288 | } | |
289 | ||
290 | /* :hub.splidge.netsplit.net 311 moo splidge splidge ground.stbarnab.as * :splidge | |
291 | :hub.splidge.netsplit.net 312 moo splidge splidge.netsplit.net :splidge's netsplit leaf | |
292 | :hub.splidge.netsplit.net 313 moo splidge :is an IRC Operator | |
293 | :hub.splidge.netsplit.net 318 moo splidge :End of /WHOIS list. | |
294 | */ | |
295 | ||
296 | /* And the target... */ | |
297 | if ((target=getnickbynick(cargv[1]))==NULL) { | |
298 | irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[1]); | |
299 | } else { | |
300 | irc_send(":%s 311 %s %s %s %s * :%s",myserver->content,sender->nick,target->nick,target->ident, | |
301 | target->host->name->content, target->realname->name->content); | |
302 | nicks[0]=sender; nicks[1]=target; | |
303 | triggerhook(HOOK_NICK_WHOISCHANNELS,nicks); | |
304 | if (IsOper(sender) || !HIS_SERVER ) { | |
305 | irc_send(":%s 312 %s %s %s :%s",myserver->content,sender->nick,target->nick, | |
306 | serverlist[homeserver(target->numeric)].name->content, | |
307 | serverlist[homeserver(target->numeric)].description->content); | |
308 | } else { | |
309 | irc_send(":%s 312 %s %s " HIS_SERVERNAME " :" HIS_SERVERDESC,myserver->content,sender->nick,target->nick); | |
310 | } | |
311 | if (IsOper(target)) { | |
312 | irc_send(":%s 313 %s %s :is an IRC Operator",myserver->content,sender->nick,target->nick); | |
313 | } | |
314 | if (IsAccount(target)) { | |
315 | irc_send(":%s 330 %s %s %s :is logged in as",myserver->content,sender->nick,target->nick,target->authname); | |
316 | } | |
317 | if (homeserver(target->numeric)==mylongnum && !IsService(target)) { | |
318 | irc_send(":%s 317 %s %s %ld %ld :seconds idle, signon time",myserver->content,sender->nick,target->nick, | |
319 | 0,target->timestamp); | |
320 | } | |
321 | } | |
322 | ||
323 | irc_send(":%s 318 %s %s :End of /WHOIS list.",myserver->content,sender->nick,cargv[1]); | |
324 | return CMD_OK; | |
325 | } | |
326 | ||
327 | int handleaccountmsg(void *source, int cargc, char **cargv) { | |
328 | nick *target; | |
329 | ||
330 | if (cargc<2) { | |
331 | return CMD_OK; | |
332 | } | |
333 | ||
334 | if ((target=getnickbynumericstr(cargv[0]))==NULL) { | |
335 | return CMD_OK; | |
336 | } | |
337 | ||
338 | if (IsAccount(target)) { | |
339 | return CMD_OK; | |
340 | } | |
341 | ||
342 | SetAccount(target); | |
343 | strncpy(target->authname,cargv[1],ACCOUNTLEN); | |
344 | target->authname[ACCOUNTLEN]='\0'; | |
345 | ||
346 | triggerhook(HOOK_NICK_ACCOUNT, (void *)target); | |
347 | ||
348 | return CMD_OK; | |
349 | } | |
350 | ||
351 | int handlestatsmsg(void *source, int cargc, char **cargv) { | |
352 | int sourceserver; | |
353 | char *sender=(char *)source; | |
354 | char *replytarget; | |
355 | char *fromstring; | |
356 | nick *np; | |
357 | ||
358 | if (cargc<2) { | |
359 | Error("nick",ERR_WARNING,"STATS request without enough parameters!"); | |
360 | return CMD_OK; | |
361 | } | |
362 | ||
363 | if (strlen(sender)==5) { | |
364 | /* client */ | |
365 | np=getnickbynumericstr(sender); | |
366 | if (!np) { | |
367 | Error("nick",ERR_WARNING,"STATS request from unknown client %s",sender); | |
368 | return CMD_OK; | |
369 | } | |
370 | replytarget=np->nick; | |
371 | } else { | |
372 | Error("nick",ERR_WARNING,"STATS request from odd source %s",sender); | |
373 | return CMD_OK; | |
374 | } | |
375 | ||
376 | /* Reply to stats for ANY server.. including any we are juping */ | |
377 | sourceserver=numerictolong(cargv[1],2); | |
378 | if (serverlist[sourceserver].maxusernum==0) { | |
379 | Error("nick",ERR_WARNING,"Stats request for bad server %s",cargv[1]); | |
380 | return CMD_OK; | |
381 | } | |
382 | fromstring=serverlist[sourceserver].name->content; | |
383 | ||
384 | switch(cargv[0][0]) { | |
385 | case 'u': | |
386 | irc_send(":%s 242 %s :Server Up %s",fromstring,replytarget, | |
387 | longtoduration(time(NULL)-starttime, 0)); | |
388 | irc_send(":%s 250 %s :Highest connection count: 10 (9 clients)",fromstring,replytarget); | |
389 | break; | |
390 | ||
391 | case 'P': | |
392 | irc_send(":%s 217 %s P none 0 :0x2000",fromstring,replytarget); | |
393 | break; | |
394 | ||
395 | } | |
396 | ||
397 | irc_send(":%s 219 %s %c :End of /STATS report",fromstring,replytarget,cargv[0][0]); | |
398 | ||
399 | return CMD_OK; | |
400 | } |