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c86edd1d Q |
1 | /* localuser.c */ |
2 | ||
3 | #include "../nick/nick.h" | |
4 | #include "../lib/base64.h" | |
5 | #include "../irc/irc.h" | |
6 | #include "../irc/irc_config.h" | |
7 | #include "../core/hooks.h" | |
8 | #include "../core/error.h" | |
87698d77 | 9 | #include "../lib/version.h" |
c86edd1d Q |
10 | #include "localuser.h" |
11 | ||
12 | #include <string.h> | |
13 | #include <stdarg.h> | |
14 | #include <stdio.h> | |
15 | ||
70b0a4e5 | 16 | MODULE_VERSION(""); |
87698d77 | 17 | |
c86edd1d Q |
18 | int currentlocalunum; |
19 | UserMessageHandler umhandlers[MAXLOCALUSER+1]; | |
20 | ||
21 | void checklocalkill(int hooknum, void *nick); | |
22 | ||
23 | void _init() { | |
24 | int i; | |
25 | ||
26 | for (i=0;i<=MAXLOCALUSER;i++) { | |
27 | umhandlers[i]=NULL; | |
28 | } | |
29 | currentlocalunum=1; | |
30 | registerhook(HOOK_IRC_SENDBURSTNICKS,&sendnickburst); | |
31 | registerhook(HOOK_NICK_LOSTNICK,&checklocalkill); | |
32 | registerserverhandler("P",&handleprivatemsgcmd,2); | |
33 | registerserverhandler("O",&handleprivatenoticecmd, 2); | |
34 | } | |
35 | ||
36 | /* | |
37 | * registerlocaluser: | |
38 | * This function creates a local user, and broadcasts it's existence to the net (if connected). | |
39 | */ | |
40 | ||
41 | nick *registerlocaluser(char *nickname, char *ident, char *host, char *realname, char *authname, flag_t umodes, UserMessageHandler handler) { | |
42 | int i; | |
43 | nick *newuser,*np; | |
44 | ||
45 | i=0; | |
95ee3dac | 46 | currentlocalunum=(currentlocalunum+1)%262142; |
c86edd1d Q |
47 | while (servernicks[numerictolong(mynumeric->content,2)][currentlocalunum&MAXLOCALUSER]!=NULL) { |
48 | /* Numeric 262143 on our server is used for "nouser" by the channels module, so cannot be allocated */ | |
49 | currentlocalunum=(currentlocalunum+1)%262142; | |
50 | if (++i>MAXLOCALUSER) { | |
51 | return NULL; | |
52 | } | |
53 | } | |
54 | ||
55 | /* This code is very similar to stuff in nick.c... */ | |
56 | newuser=newnick(); | |
57 | newuser->numeric=(numerictolong(mynumeric->content,2)<<18)|(currentlocalunum); | |
58 | strncpy(newuser->nick,nickname,NICKLEN); | |
59 | newuser->nick[NICKLEN]='\0'; | |
60 | strncpy(newuser->ident,ident,USERLEN); | |
61 | newuser->ident[USERLEN]='\0'; | |
62 | newuser->host=findorcreatehost(host); | |
63 | newuser->realname=findorcreaterealname(realname); | |
64 | newuser->nextbyhost=newuser->host->nicks; | |
65 | newuser->host->nicks=newuser; | |
66 | newuser->nextbyrealname=newuser->realname->nicks; | |
67 | newuser->realname->nicks=newuser; | |
68 | newuser->umodes=umodes; | |
69 | newuser->ipaddress=(127<<24)+(1<<8)+((currentlocalunum%253)+1); /* Make it look like a valid addr on 127.0.1.0/24 */ | |
70 | newuser->timestamp=getnettime(); | |
71 | newuser->shident=NULL; | |
72 | newuser->sethost=NULL; | |
73 | newuser->marker=0; | |
74 | memset(newuser->exts, 0, MAXNICKEXTS * sizeof(void *)); | |
75 | ||
76 | if (IsAccount(newuser)) { | |
77 | strncpy(newuser->authname,authname,ACCOUNTLEN); | |
78 | } else { | |
79 | newuser->authname[0]='\0'; | |
80 | } | |
81 | ||
82 | if (connected) { | |
83 | /* Check for nick collision */ | |
84 | if ((np=getnickbynick(nickname))!=NULL) { | |
85 | /* Make sure we will win the collision */ | |
86 | newuser->timestamp=(np->timestamp-1); | |
87 | killuser(NULL, np, "Nick collision"); | |
88 | } | |
89 | sendnickmsg(newuser); | |
90 | } | |
91 | ||
92 | if (handler!=NULL) { | |
93 | umhandlers[(currentlocalunum&MAXLOCALUSER)]=handler; | |
94 | } | |
95 | ||
96 | *(gethandlebynumeric(newuser->numeric))=newuser; | |
97 | addnicktohash(newuser); | |
98 | triggerhook(HOOK_NICK_NEWNICK,newuser); | |
99 | ||
100 | return newuser; | |
101 | } | |
102 | ||
103 | /* | |
104 | * renamelocaluser: | |
105 | * This function changes the name of a given local user | |
106 | */ | |
107 | ||
108 | int renamelocaluser(nick *np, char *newnick) { | |
109 | nick *np2; | |
110 | time_t timestamp=getnettime(); | |
111 | ||
112 | if (!np) | |
113 | return -1; | |
114 | ||
115 | if (strlen(newnick) > NICKLEN) | |
116 | return -1; | |
117 | ||
118 | if (homeserver(np->numeric)!=mylongnum) | |
119 | return -1; | |
120 | ||
121 | if ((np2=getnickbynick(newnick))) { | |
122 | if (np2==np) { | |
123 | /* Case only name change */ | |
124 | strncpy(np->nick,newnick,NICKLEN); | |
125 | np->nick[NICKLEN]='\0'; | |
126 | irc_send("%s N %s %d",longtonumeric(np->numeric,5),np->nick,np->timestamp); | |
127 | triggerhook(HOOK_NICK_RENAME,np); | |
128 | return 0; | |
129 | } else { | |
130 | /* Kill other user and drop through */ | |
131 | timestamp=np2->timestamp-1; | |
132 | killuser(NULL, np2, "Nick collision"); | |
133 | } | |
134 | } | |
135 | ||
136 | np->timestamp=timestamp; | |
137 | removenickfromhash(np); | |
138 | strncpy(np->nick,newnick,NICKLEN); | |
139 | np->nick[NICKLEN]='\0'; | |
140 | addnicktohash(np); | |
141 | irc_send("%s N %s %d",longtonumeric(np->numeric,5),np->nick,np->timestamp); | |
142 | triggerhook(HOOK_NICK_RENAME,np); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | /* | |
148 | * deregisterlocaluser: | |
149 | * This function removes the given local user from the network | |
150 | */ | |
151 | ||
152 | int deregisterlocaluser(nick *np, char *reason) { | |
153 | int defaultreason=0; | |
154 | long numeric; | |
155 | ||
156 | if (np==NULL || (homeserver(np->numeric)!=mylongnum)) { | |
157 | /* Non-existent user, or user not on this server */ | |
158 | return -1; | |
159 | } | |
160 | ||
161 | if (reason==NULL || *reason=='\0') { | |
162 | defaultreason=1; | |
163 | } | |
164 | ||
165 | numeric=np->numeric; | |
166 | umhandlers[np->numeric&MAXLOCALUSER]=NULL; | |
167 | deletenick(np); | |
168 | if (connected) { | |
169 | irc_send("%s Q :Quit: %s",longtonumeric(numeric,5),(defaultreason?"Leaving":reason)); | |
170 | } | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
c5f1f827 CP |
175 | /* |
176 | * hooklocaluserhandler: | |
177 | * This function adds a new handler to the hook chain for a local user | |
178 | * THIS RELIES ON MODULES BEING UNLOADED IN THE CORRECT ORDER. | |
179 | */ | |
180 | UserMessageHandler hooklocaluserhandler(nick *np, UserMessageHandler newhandler) { | |
181 | UserMessageHandler oldhandler = NULL; | |
182 | if (np==NULL || (homeserver(np->numeric)!=mylongnum)) { | |
183 | /* Non-existent user, or user not on this server */ | |
184 | return NULL; | |
185 | } | |
186 | oldhandler = umhandlers[np->numeric&MAXLOCALUSER]; | |
187 | umhandlers[np->numeric&MAXLOCALUSER]=newhandler; | |
188 | return oldhandler; | |
189 | } | |
190 | ||
c86edd1d Q |
191 | /* |
192 | * sendnickmsg: | |
193 | * Sends details of a given local nick to the network. | |
194 | */ | |
195 | ||
196 | void sendnickmsg(nick *np) { | |
197 | char numericbuf[6]; | |
198 | ||
199 | strncpy(numericbuf,longtonumeric(np->numeric,5),5); | |
200 | numericbuf[5]='\0'; | |
201 | ||
202 | irc_send("%s N %s 1 %ld %s %s %s%s%s %s %s :%s", | |
203 | mynumeric->content,np->nick,np->timestamp,np->ident,np->host->name->content, | |
204 | printflags(np->umodes,umodeflags),IsAccount(np)?" ":"", | |
205 | np->authname,longtonumeric(np->ipaddress,6),numericbuf, | |
206 | np->realname->name->content); | |
207 | } | |
208 | ||
209 | void sendnickburst(int hooknum, void *arg) { | |
210 | /* Send nick messages for all local users */ | |
211 | nick **nh; | |
212 | int i; | |
213 | ||
214 | nh=servernicks[numerictolong(mynumeric->content,2)]; | |
215 | for (i=0;i<=MAXLOCALUSER;i++) { | |
216 | if (nh[i]!=NULL) { | |
217 | sendnickmsg(nh[i]); | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
222 | /* Check for a kill of a local user */ | |
223 | void checklocalkill(int hooknum, void *target) { | |
224 | long numeric; | |
225 | void *args[1]; | |
226 | ||
227 | args[0]=NULL; | |
228 | ||
229 | numeric=((nick *)target)->numeric; | |
230 | ||
231 | if (homeserver(numeric)==mylongnum) { | |
232 | if (umhandlers[(numeric)&MAXLOCALUSER]!=NULL) { | |
233 | (umhandlers[(numeric)&MAXLOCALUSER])((nick *)target,LU_KILLED,args); | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | int handleprivatemsgcmd(void *source, int cargc, char **cargv) { | |
239 | return handlemessageornotice(source, cargc, cargv, 0); | |
240 | } | |
241 | ||
242 | int handleprivatenoticecmd(void *source, int cargc, char **cargv) { | |
243 | return handlemessageornotice(source, cargc, cargv, 1); | |
244 | } | |
245 | ||
246 | /* Handle privmsg or notice command addressed to user */ | |
247 | int handlemessageornotice(void *source, int cargc, char **cargv, int isnotice) { | |
248 | nick *sender; | |
249 | nick *target; | |
250 | char *ch; | |
251 | char targetnick[NICKLEN+1]; | |
252 | int foundat; | |
253 | void *nargs[2]; | |
254 | int i; | |
255 | ||
256 | /* Should have target and message */ | |
257 | if (cargc<2) { | |
258 | return CMD_OK; | |
259 | } | |
260 | ||
261 | if (cargv[0][0]=='#' || cargv[0][0]=='+') { | |
262 | /* Channel message/notice */ | |
263 | return CMD_OK; | |
264 | } | |
265 | ||
266 | if ((sender=getnickbynumericstr((char *)source))==NULL) { | |
267 | Error("localuser",ERR_WARNING,"PRIVMSG from non existant user %s",(char *)source); | |
268 | return CMD_OK; | |
269 | } | |
270 | ||
271 | /* Check for a "secure" message (foo@bar) */ | |
272 | foundat=0; | |
273 | for (i=0,ch=cargv[0];(i<=NICKLEN) && (*ch);i++,ch++) { | |
274 | if (*ch=='@') { | |
275 | targetnick[i]='\0'; | |
276 | foundat=1; | |
277 | break; | |
278 | } else { | |
279 | targetnick[i]=*ch; | |
280 | } | |
281 | } | |
282 | ||
283 | if (!foundat) { /* Didn't find an @ sign, assume it's a numeric */ | |
284 | if ((target=getnickbynumericstr(cargv[0]))==NULL) { | |
285 | Error("localuser",ERR_DEBUG,"Couldn't find target for %s",cargv[0]); | |
286 | return CMD_OK; | |
287 | } | |
288 | } else { /* Did find @, do a lookup by nick */ | |
289 | if ((target=getnickbynick(targetnick))==NULL) { | |
290 | Error("localuser",ERR_DEBUG,"Couldn't find target for %s",cargv[0]); | |
bc81aa36 | 291 | irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[0]); |
c86edd1d Q |
292 | return CMD_OK; |
293 | } | |
294 | } | |
295 | ||
296 | if (homeserver(target->numeric)!=mylongnum) { | |
297 | Error("localuser",ERR_WARNING,"Got message/notice for someone not on my server"); | |
bc81aa36 C |
298 | irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[0]); |
299 | return CMD_OK; | |
300 | } | |
301 | ||
302 | if (foundat && !IsService(target)) { | |
303 | Error("localuser",ERR_DEBUG,"Received secure message for %s, but user is not a service",cargv[0]); | |
304 | irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[0]); | |
c86edd1d Q |
305 | return CMD_OK; |
306 | } | |
307 | ||
308 | if (umhandlers[(target->numeric)&MAXLOCALUSER]==NULL) { | |
309 | /* No handler anyhow.. */ | |
310 | return CMD_OK; | |
311 | } | |
312 | ||
313 | /* Dispatch the message. */ | |
314 | nargs[0]=(void *)sender; | |
315 | nargs[1]=(void *)cargv[1]; | |
316 | (umhandlers[(target->numeric)&MAXLOCALUSER])(target,isnotice?LU_PRIVNOTICE:(foundat?LU_SECUREMSG:LU_PRIVMSG),nargs); | |
317 | ||
318 | return CMD_OK; | |
319 | } | |
320 | ||
321 | /* Send message to user */ | |
322 | void sendmessagetouser(nick *source, nick *target, char *format, ... ) { | |
323 | char buf[BUFSIZE]; | |
324 | char senderstr[6]; | |
325 | va_list va; | |
326 | ||
327 | longtonumeric2(source->numeric,5,senderstr); | |
328 | ||
329 | va_start(va,format); | |
330 | /* 10 bytes of numeric, 5 bytes of fixed format + terminator = 17 bytes */ | |
331 | /* So max sendable message is 495 bytes. Of course, a client won't be able | |
332 | * to receive this.. */ | |
333 | ||
334 | vsnprintf(buf,BUFSIZE-17,format,va); | |
335 | va_end(va); | |
336 | ||
337 | if (homeserver(target->numeric)!=mylongnum) | |
338 | irc_send("%s P %s :%s",senderstr,longtonumeric(target->numeric,5),buf); | |
339 | } | |
340 | ||
341 | /* Send messageto server, we don't check, but noones going to want to put a server pointer in anyway... */ | |
342 | void sendsecuremessagetouser(nick *source, nick *target, char *servername, char *format, ... ) { | |
343 | char buf[BUFSIZE]; | |
344 | char senderstr[6]; | |
345 | va_list va; | |
346 | ||
347 | longtonumeric2(source->numeric,5,senderstr); | |
348 | ||
349 | va_start(va,format); | |
350 | /* 10 bytes of numeric, 5 bytes of fixed format + terminator = 17 bytes */ | |
351 | /* So max sendable message is 495 bytes. Of course, a client won't be able | |
352 | * to receive this.. */ | |
353 | ||
354 | vsnprintf(buf,BUFSIZE-17,format,va); | |
355 | va_end(va); | |
356 | ||
357 | if (homeserver(target->numeric)!=mylongnum) | |
358 | irc_send("%s P %s@%s :%s",senderstr,target->nick,servername,buf); | |
359 | } | |
360 | ||
361 | /* Send notice to user */ | |
362 | void sendnoticetouser(nick *source, nick *target, char *format, ... ) { | |
363 | char buf[BUFSIZE]; | |
364 | char senderstr[6]; | |
365 | va_list va; | |
366 | ||
367 | longtonumeric2(source->numeric,5,senderstr); | |
368 | ||
369 | va_start(va,format); | |
370 | /* 10 bytes of numeric, 5 bytes of fixed format + terminator = 17 bytes */ | |
371 | /* So max sendable message is 495 bytes. Of course, a client won't be able | |
372 | * to receive this.. */ | |
373 | ||
374 | vsnprintf(buf,BUFSIZE-17,format,va); | |
375 | va_end(va); | |
376 | ||
377 | if (homeserver(target->numeric)!=mylongnum) | |
378 | irc_send("%s O %s :%s",senderstr,longtonumeric(target->numeric,5),buf); | |
379 | } | |
380 | ||
381 | /* Kill user */ | |
382 | void killuser(nick *source, nick *target, char *format, ... ) { | |
383 | char buf[BUFSIZE]; | |
384 | char senderstr[6]; | |
385 | char sourcestring[NICKLEN+USERLEN+3]; | |
386 | va_list va; | |
387 | ||
388 | if (!source) { | |
389 | /* If we have a null nick, use the server.. */ | |
390 | strcpy(senderstr, mynumeric->content); | |
391 | strcpy(sourcestring, myserver->content); | |
392 | } else { | |
393 | strcpy(senderstr, longtonumeric(source->numeric,5)); | |
394 | sprintf(sourcestring,"%s!%s",source->host->name->content, source->nick); | |
395 | } | |
396 | ||
397 | va_start(va, format); | |
398 | vsnprintf(buf, BUFSIZE-17, format, va); | |
399 | va_end (va); | |
400 | ||
401 | irc_send("%s D %s :%s (%s)",senderstr,longtonumeric(target->numeric,5),sourcestring,buf); | |
402 | deletenick(target); | |
403 | } | |
404 | ||
405 | /* Auth user */ | |
406 | void localusersetaccount(nick *np, char *accname) { | |
407 | if (IsAccount(np)) { | |
408 | Error("localuser",ERR_WARNING,"Tried to set account on user %s already authed", np->nick); | |
409 | return; | |
410 | } | |
411 | ||
412 | SetAccount(np); | |
413 | strncpy(np->authname, accname, ACCOUNTLEN); | |
414 | np->authname[ACCOUNTLEN]='\0'; | |
415 | ||
416 | if (connected) { | |
417 | irc_send("%s AC %s %s %ld",mynumeric->content, longtonumeric(np->numeric,5), np->authname, getnettime()); | |
418 | } | |
419 | ||
420 | triggerhook(HOOK_NICK_ACCOUNT, np); | |
421 | } | |
422 |