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c86edd1d Q |
1 | /* nick.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" | |
87698d77 | 14 | #include "../lib/version.h" |
c86edd1d Q |
15 | #include <stdlib.h> |
16 | #include <string.h> | |
17 | #include <stdio.h> | |
18 | ||
70b0a4e5 | 19 | MODULE_VERSION(""); |
87698d77 | 20 | |
c86edd1d Q |
21 | const flag umodeflags[] = { |
22 | { 'i', UMODE_INV }, | |
23 | { 'w', UMODE_WALLOPS }, | |
24 | { 'g', UMODE_DEBUG }, | |
25 | { 'o', UMODE_OPER }, | |
26 | { 'k', UMODE_SERVICE }, | |
27 | { 'X', UMODE_XOPER }, | |
28 | { 'd', UMODE_DEAF }, | |
29 | { 'r', UMODE_ACCOUNT }, | |
30 | { 'n', UMODE_HIDECHAN }, | |
31 | { 'x', UMODE_HIDEHOST }, | |
32 | { 'h', UMODE_SETHOST }, | |
33 | { 'R', UMODE_REGPRIV }, | |
34 | { 'I', UMODE_HIDEIDLE }, | |
35 | { '\0', 0 } }; | |
36 | ||
37 | #define nickhash(x) ((crc32i(x))%NICKHASHSIZE) | |
38 | ||
39 | nick *nicktable[NICKHASHSIZE]; | |
40 | nick **servernicks[MAXSERVERS]; | |
41 | ||
42 | sstring *nickextnames[MAXNICKEXTS]; | |
43 | ||
44 | void nickstats(int hooknum, void *arg); | |
45 | ||
46 | void _init() { | |
47 | initnickalloc(); | |
48 | initnickhelpers(); | |
49 | memset(nicktable,0,sizeof(nicktable)); | |
50 | memset(servernicks,0,sizeof(servernicks)); | |
51 | ||
52 | /* Register our hooks */ | |
53 | registerhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
54 | registerhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
55 | registerhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
56 | ||
57 | /* And our server handlers */ | |
58 | registerserverhandler("N",&handlenickmsg,10); | |
59 | registerserverhandler("D",&handlekillmsg,2); | |
60 | registerserverhandler("Q",&handlequitmsg,1); | |
61 | registerserverhandler("M",&handleusermodemsg,3); | |
62 | registerserverhandler("W",&handlewhoismsg,2); | |
63 | registerserverhandler("AC",&handleaccountmsg,2); | |
64 | registerserverhandler("R",&handlestatsmsg,2); | |
65 | ||
66 | /* Fake the addition of our own server */ | |
67 | handleserverchange(HOOK_SERVER_NEWSERVER,(void *)numerictolong(mynumeric->content,2)); | |
68 | } | |
69 | ||
70 | /* | |
71 | * This function handles servers appearing and disappearing. | |
72 | * For a new server, the client table is allocated. | |
73 | * For a disappearing server, all it's clients are killed and the client table is freed. | |
74 | */ | |
75 | ||
76 | void handleserverchange(int hooknum, void *arg) { | |
77 | int servernum; | |
78 | int i; | |
79 | ||
80 | servernum=(int)arg; | |
81 | ||
82 | switch(hooknum) { | |
83 | case HOOK_SERVER_NEWSERVER: | |
84 | servernicks[servernum]=(nick **)malloc((serverlist[servernum].maxusernum+1)*sizeof(nick **)); | |
85 | memset(servernicks[servernum],0,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); | |
86 | break; | |
87 | ||
88 | case HOOK_SERVER_LOSTSERVER: | |
89 | for (i=0;i<=serverlist[servernum].maxusernum;i++) { | |
90 | if (servernicks[servernum][i]!=NULL) { | |
91 | deletenick(servernicks[servernum][i]); | |
92 | } | |
93 | } | |
94 | free(servernicks[servernum]); | |
95 | break; | |
96 | } | |
97 | } | |
98 | ||
99 | /* | |
100 | * deletenick: | |
101 | * | |
102 | * This function handles the removal of a nick from the network | |
103 | */ | |
104 | ||
105 | void deletenick(nick *np) { | |
106 | nick **nh; | |
107 | ||
108 | /* Fire the hook. This will deal with removal from channels etc. */ | |
109 | triggerhook(HOOK_NICK_LOSTNICK, np); | |
110 | ||
111 | /* Release the realname and hostname parts */ | |
112 | ||
113 | for (nh=&(np->realname->nicks);*nh;nh=&((*nh)->nextbyrealname)) { | |
114 | if (*nh==np) { | |
115 | *nh=np->nextbyrealname; | |
116 | break; | |
117 | } | |
118 | } | |
119 | ||
120 | for (nh=&(np->host->nicks);*nh;nh=&((*nh)->nextbyhost)) { | |
121 | if (*nh==np) { | |
122 | *nh=np->nextbyhost; | |
123 | break; | |
124 | } | |
125 | } | |
126 | ||
127 | releaserealname(np->realname); | |
128 | releasehost(np->host); | |
129 | ||
130 | freesstring(np->shident); /* freesstring(NULL) is OK */ | |
131 | freesstring(np->sethost); | |
132 | ||
133 | /* Delete the nick from the servernick table */ | |
134 | *(gethandlebynumericunsafe(np->numeric))=NULL; | |
135 | ||
136 | /* Remove the nick from the hash table */ | |
137 | removenickfromhash(np); | |
138 | ||
139 | freenick(np); | |
140 | } | |
141 | ||
142 | void addnicktohash(nick *np) { | |
143 | np->next=nicktable[nickhash(np->nick)]; | |
144 | nicktable[nickhash(np->nick)]=np; | |
145 | } | |
146 | ||
147 | void removenickfromhash(nick *np) { | |
148 | nick **nh; | |
149 | ||
150 | for (nh=&(nicktable[nickhash(np->nick)]);*nh;nh=&((*nh)->next)) { | |
151 | if ((*nh)==np) { | |
152 | (*nh)=np->next; | |
153 | break; | |
154 | } | |
155 | } | |
156 | } | |
157 | ||
158 | nick *getnickbynick(const char *name) { | |
159 | nick *np; | |
160 | ||
161 | for (np=nicktable[nickhash(name)];np;np=np->next) { | |
162 | if (!ircd_strcmp(np->nick,name)) | |
163 | return np; | |
164 | } | |
165 | ||
166 | return NULL; | |
167 | } | |
168 | ||
169 | void nickstats(int hooknum, void *arg) { | |
170 | int total,maxchain,curchain,i,buckets; | |
171 | nick *np; | |
172 | char buf[200]; | |
173 | ||
174 | /* Get nick stats */ | |
175 | buckets=total=maxchain=curchain=0; | |
176 | for (i=0;i<NICKHASHSIZE;i++,curchain=0) { | |
177 | np=nicktable[i]; | |
178 | if (np!=NULL) { | |
179 | buckets++; | |
180 | for (;np;np=np->next) { | |
181 | total++; | |
182 | curchain++; | |
183 | } | |
184 | } | |
185 | if (curchain>maxchain) { | |
186 | maxchain=curchain; | |
187 | } | |
188 | } | |
189 | ||
190 | if ((int)arg>5) { | |
191 | /* Full stats */ | |
192 | sprintf(buf,"Nick : %6d nicks (HASH: %6d/%6d, chain %3d)",total,buckets,NICKHASHSIZE,maxchain); | |
193 | } else if ((int)arg>2) { | |
194 | sprintf(buf,"Nick : %6d users on network.",total); | |
195 | } | |
196 | ||
197 | if ((int)arg>2) { | |
198 | triggerhook(HOOK_CORE_STATSREPLY,buf); | |
199 | } | |
200 | } | |
201 | ||
202 | int registernickext(const char *name) { | |
203 | int i; | |
204 | ||
205 | if (findnickext(name)!=-1) { | |
206 | Error("nick",ERR_WARNING,"Tried to register duplicate nick extension %s",name); | |
207 | return -1; | |
208 | } | |
209 | ||
210 | for (i=0;i<MAXNICKEXTS;i++) { | |
211 | if (nickextnames[i]==NULL) { | |
212 | nickextnames[i]=getsstring(name,100); | |
213 | return i; | |
214 | } | |
215 | } | |
216 | ||
217 | Error("channel",ERR_WARNING,"Tried to register too many extensions: %s",name); | |
218 | return -1; | |
219 | } | |
220 | ||
221 | int findnickext(const char *name) { | |
222 | int i; | |
223 | ||
224 | for (i=0;i<MAXNICKEXTS;i++) { | |
225 | if (nickextnames[i]!=NULL && !ircd_strcmp(name,nickextnames[i]->content)) { | |
226 | return i; | |
227 | } | |
228 | } | |
229 | ||
230 | return -1; | |
231 | } | |
232 | ||
233 | void releasenickext(int index) { | |
234 | int i; | |
235 | nick *np; | |
236 | ||
237 | freesstring(nickextnames[index]); | |
238 | nickextnames[index]=NULL; | |
239 | ||
240 | for (i=0;i<NICKHASHSIZE;i++) { | |
241 | for (np=nicktable[i];np;np=np->next) { | |
242 | np->exts[index]=NULL; | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
247 | /* visiblehostmask | |
248 | * Produces the "apparent" hostmask as seen by network users. | |
249 | */ | |
250 | ||
251 | char *visiblehostmask(nick *np, char *buf) { | |
252 | char hostbuf[HOSTLEN+1]; | |
253 | char *ident, *host; | |
254 | ||
255 | ident=np->ident; | |
256 | host=np->host->name->content; | |
257 | ||
258 | if (IsSetHost(np)) { | |
259 | if (np->shident) { | |
260 | ident=np->shident->content; | |
261 | } | |
262 | if (np->sethost) { | |
263 | host=np->sethost->content; | |
264 | } | |
265 | } else if (IsAccount(np) && IsHideHost(np)) { | |
266 | sprintf(hostbuf,"%s.%s", np->authname, HIS_HIDDENHOST); | |
267 | host=hostbuf; | |
268 | } | |
269 | ||
270 | sprintf(buf,"%s!%s@%s",np->nick,ident,host); | |
271 | ||
272 | return buf; | |
273 | } | |
274 | ||
275 | #if 0 | |
276 | ||
277 | /* | |
278 | * gethandlebynumeric: | |
279 | * Given a numeric, gives the location in the servernicks table | |
280 | * where it should be. Does not check that the nick currently found | |
281 | * there (if any) has the correct numeric; this is left to the | |
282 | * calling function to figure out. | |
283 | */ | |
284 | ||
285 | nick **gethandlebynumeric(long numeric) { | |
286 | int servernum; | |
287 | int maskednum; | |
288 | server *serv; | |
289 | ||
290 | /* Shift off the client identifier part of the numeric to get the server ID */ | |
291 | servernum=(numeric>>18); | |
292 | ||
293 | if ((serv=getserverdata(servernum))==NULL) { | |
294 | Error("nick",ERR_WARNING,"Numeric %ld refers to non-existent server %d",numeric,servernum); | |
295 | return NULL; | |
296 | } | |
297 | ||
298 | /* Compute the masked numeric */ | |
299 | maskednum=numeric&(serv->maxusernum); | |
300 | ||
301 | return (servernicks[servernum])+maskednum; | |
302 | } | |
303 | ||
304 | /* | |
305 | * getnickbynumeric[str]() | |
306 | * These functions retrieve a nick based on it's numeric on the network | |
307 | * Use the approriate function depending on how your numeric is expressed.. | |
308 | */ | |
309 | ||
310 | nick *getnickbynumeric(long numeric) { | |
311 | nick **nh; | |
312 | ||
313 | nh=gethandlebynumeric(numeric); | |
314 | ||
315 | if ((*nh) && ((*nh)->numeric!=numeric)) { | |
316 | /* We found a masked numeric match, but the actual numeric | |
317 | * is different. This counts as a miss. */ | |
318 | return NULL; | |
319 | } | |
320 | ||
321 | return (*nh); | |
322 | } | |
323 | ||
324 | nick *getnickbynumericstr(char *numericstr) { | |
325 | return getnickbynumeric(numerictolong(numericstr,5)); | |
326 | } | |
327 | ||
328 | #endif |