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1 | #include <stdio.h> | |
2 | #include <string.h> | |
3 | #include "../irc/irc.h" | |
4 | #include "../lib/irc_string.h" | |
5 | #include "request_block.h" | |
6 | ||
7 | /* array of blocks */ | |
8 | array rqblocks; | |
9 | ||
10 | /* our anti-flood nick extension */ | |
11 | int rqnext; | |
12 | ||
13 | /* are we currently loading blocks? */ | |
14 | int rq_loading; | |
15 | ||
16 | void rqhook_lostnick(int hook, void *arg); | |
17 | ||
18 | int rq_initblocks(void) { | |
19 | rqnext = registernickext("request"); | |
20 | if(rqnext < 0) | |
21 | return 0; | |
22 | ||
23 | array_init(&rqblocks, sizeof(rq_block)); | |
24 | array_setlim1(&rqblocks, 5); | |
25 | array_setlim2(&rqblocks, 20); | |
26 | ||
27 | rq_loading = 0; | |
28 | ||
29 | rq_loadblocks(); | |
30 | ||
31 | rq_addblock("#qnet*", "Reserved for QuakeNet use only.", "request", 0, 0); | |
32 | rq_addblock("#help*", "Reserved for QuakeNet use only.", "request", 0, 0); | |
33 | ||
34 | registerhook(HOOK_NICK_LOSTNICK, &rqhook_lostnick); | |
35 | ||
36 | return 1; | |
37 | } | |
38 | ||
39 | void rq_finiblocks(void) { | |
40 | int i; | |
41 | rq_block block; | |
42 | nick *nip; | |
43 | ||
44 | for (i = 0; i < rqblocks.cursi; i++) { | |
45 | block = ((rq_block*)rqblocks.content)[i]; | |
46 | ||
47 | freesstring(block.pattern); | |
48 | freesstring(block.reason); | |
49 | freesstring(block.creator); | |
50 | } | |
51 | ||
52 | array_free(&rqblocks); | |
53 | ||
54 | for (i=0; i<NICKHASHSIZE; i++) | |
55 | for (nip=nicktable[i]; nip; nip=nip->next) | |
56 | free(nip->exts[rqnext]); | |
57 | ||
58 | deregisterhook(HOOK_NICK_LOSTNICK, &rqhook_lostnick); | |
59 | ||
60 | releasenickext(rqnext); | |
61 | } | |
62 | ||
63 | void rqhook_lostnick(int hook, void *arg) { | |
64 | nick *np = (nick*)arg; | |
65 | ||
66 | free(np->exts[rqnext]); | |
67 | } | |
68 | ||
69 | int rq_isspam(nick *np) { | |
70 | rq_flood *lf; | |
71 | ||
72 | if (np->exts[rqnext] == NULL) { | |
73 | np->exts[rqnext] = lf = (rq_flood*)malloc(sizeof(rq_flood)); | |
74 | ||
75 | lf->count = 1; | |
76 | lf->created = getnettime(); | |
77 | lf->expire = 0; | |
78 | ||
79 | return 0; | |
80 | } else { | |
81 | lf = np->exts[rqnext]; | |
82 | ||
83 | lf->count -= (getnettime() - lf->created) / (RQ_SPAMBLOCK / RQ_SPAMCOUNT); | |
84 | ||
85 | if (lf->count < 0) | |
86 | lf->count = 0; | |
87 | ||
88 | if (lf->count > RQ_SPAMCOUNT && lf->expire > getnettime()) { | |
89 | return 1; | |
90 | } else { | |
91 | lf->count++; | |
92 | ||
93 | if (lf->count > RQ_SPAMCOUNT) { | |
94 | lf->expire = getnettime() + RQ_SPAMBLOCK; | |
95 | ||
96 | rq_addblock(np->authname, "Flooding the request system.", "request", 0, getnettime() + 3600); | |
97 | ||
98 | return 1; | |
99 | } | |
100 | ||
101 | return 0; | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | time_t rq_blocktime(nick *np) { | |
107 | if (np->exts[rqnext] == NULL) | |
108 | return 0; | |
109 | else | |
110 | return ((rq_flood*)np->exts[rqnext])->expire - getnettime(); | |
111 | } | |
112 | ||
113 | rq_block *rq_findblock(const char *pattern) { | |
114 | int i; | |
115 | rq_block block; | |
116 | ||
117 | for (i = rqblocks.cursi - 1; i >= 0; i--) { | |
118 | block = ((rq_block*)rqblocks.content)[i]; | |
119 | ||
120 | if (match2strings(block.pattern->content, pattern)) { | |
121 | if (block.expires != 0 && block.expires < getnettime()) | |
122 | rq_removeblock(block.pattern->content); | |
123 | else | |
124 | return &(((rq_block*)rqblocks.content)[i]); | |
125 | } | |
126 | } | |
127 | ||
128 | return NULL; | |
129 | } | |
130 | ||
131 | void rq_addblock(const char *pattern, const char *reason, const char *creator, time_t created, time_t expires) { | |
132 | int slot; | |
133 | rq_block *block; | |
134 | ||
135 | if (rq_findblock(pattern) != NULL) | |
136 | return; | |
137 | ||
138 | slot = array_getfreeslot(&rqblocks); | |
139 | ||
140 | block = &(((rq_block*)rqblocks.content)[slot]); | |
141 | ||
142 | block->pattern = getsstring(pattern, CHANNELLEN); | |
143 | block->reason = getsstring(reason, RQ_BLOCKLEN); | |
144 | block->creator = getsstring(creator, ACCOUNTLEN); | |
145 | block->created = created == 0 ? getnettime() : created; | |
146 | block->expires = expires; | |
147 | ||
148 | rq_saveblocks(); | |
149 | } | |
150 | ||
151 | int rq_removeblock(const char *pattern) { | |
152 | int i; | |
153 | rq_block block; | |
154 | ||
155 | for (i = 0; i < rqblocks.cursi; i++) { | |
156 | block = ((rq_block*)rqblocks.content)[i]; | |
157 | ||
158 | if (ircd_strcmp(block.pattern->content, pattern) == 0) { | |
159 | freesstring(block.pattern); | |
160 | freesstring(block.reason); | |
161 | freesstring(block.creator); | |
162 | ||
163 | array_delslot(&rqblocks, i); | |
164 | ||
165 | rq_saveblocks(); | |
166 | ||
167 | return 1; | |
168 | } | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | /* pattern reason creator created expires */ | |
175 | int rq_parseline(char *line) { | |
176 | char pattern[CHANNELLEN+1]; | |
177 | char reason[RQ_BLOCKLEN+1]; | |
178 | char creator[ACCOUNTLEN+1]; | |
179 | time_t created, expires; | |
180 | ||
181 | if (sscanf(line, "%s %s %lu %lu %[^\n]", pattern, creator, &created, &expires, reason) < 2) /* \n won't be there anyway, but %s won't return the whole string */ | |
182 | return 0; /* invalid block */ | |
183 | ||
184 | /* tell rq_addblock that it should not save the blocks to disk this time */ | |
185 | rq_loading = 1; | |
186 | rq_addblock(pattern, reason, creator, created, expires); | |
187 | rq_loading = 0; | |
188 | ||
189 | return 1; | |
190 | } | |
191 | ||
192 | int rq_loadblocks(void) { | |
193 | char line[4096]; | |
194 | FILE *rqdata; | |
195 | int count; | |
196 | ||
197 | rqdata = fopen(RQ_BLOCKFILE, "r"); | |
198 | ||
199 | if (rqdata == NULL) | |
200 | return 0; | |
201 | ||
202 | count = 0; | |
203 | ||
204 | while (!feof(rqdata)) { | |
205 | if (fgets(line, sizeof(line), rqdata) == NULL) | |
206 | break; | |
207 | ||
208 | if (line[strlen(line) - 1] == '\n') | |
209 | line[strlen(line) - 1] = '\0'; | |
210 | ||
211 | if (line[strlen(line) - 1] == '\r') | |
212 | line[strlen(line) - 1] = '\0'; | |
213 | ||
214 | if (line[0] != '\0') { | |
215 | if (rq_parseline(line)) | |
216 | count++; | |
217 | } | |
218 | } | |
219 | ||
220 | fclose(rqdata); | |
221 | ||
222 | return count; | |
223 | } | |
224 | ||
225 | int rq_saveblocks(void) { | |
226 | FILE *rqdata; | |
227 | int i, count = 0; | |
228 | ||
229 | /* don't save the blocks if we're currently loading them from the disk */ | |
230 | if (rq_loading) | |
231 | return 0; | |
232 | ||
233 | rqdata = fopen(RQ_BLOCKFILE, "w"); | |
234 | ||
235 | if (rqdata == NULL) | |
236 | return 0; | |
237 | ||
238 | rq_block block; | |
239 | ||
240 | for (i = 0; i < rqblocks.cursi; i++) { | |
241 | block = ((rq_block*)rqblocks.content)[i]; | |
242 | ||
243 | fprintf(rqdata, "%s %s %lu %lu %s\n", block.pattern->content, block.creator->content, block.created, block.expires, block.reason->content); | |
244 | } | |
245 | ||
246 | fclose(rqdata); | |
247 | ||
248 | return count; | |
249 | } |