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25b7d0fa P |
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 | void rq_initblocks(void) { | |
19 | array_init(&rqblocks, sizeof(rq_block)); | |
20 | array_setlim1(&rqblocks, 5); | |
21 | array_setlim2(&rqblocks, 20); | |
22 | ||
23 | rq_loading = 0; | |
24 | ||
25 | rq_loadblocks(); | |
26 | ||
27 | rq_addblock("#qnet*", "Reserved for QuakeNet use only.", "request", 0, 0); | |
28 | rq_addblock("#help*", "Reserved for QuakeNet use only.", "request", 0, 0); | |
29 | ||
30 | registerhook(HOOK_NICK_LOSTNICK, &rqhook_lostnick); | |
31 | ||
32 | rqnext = registernickext("request"); | |
33 | } | |
34 | ||
35 | void rq_finiblocks(void) { | |
36 | int i; | |
37 | rq_block block; | |
38 | nick *nip; | |
39 | ||
40 | for (i = 0; i < rqblocks.cursi; i++) { | |
41 | block = ((rq_block*)rqblocks.content)[i]; | |
42 | ||
43 | freesstring(block.pattern); | |
44 | freesstring(block.reason); | |
45 | freesstring(block.creator); | |
46 | } | |
47 | ||
48 | array_free(&rqblocks); | |
49 | ||
50 | for (i=0; i<NICKHASHSIZE; i++) | |
51 | for (nip=nicktable[i]; nip; nip=nip->next) | |
52 | free(nip->exts[rqnext]); | |
53 | ||
54 | deregisterhook(HOOK_NICK_LOSTNICK, &rqhook_lostnick); | |
55 | ||
56 | releasenickext(rqnext); | |
57 | } | |
58 | ||
59 | void rqhook_lostnick(int hook, void *arg) { | |
60 | nick *np = (nick*)arg; | |
61 | ||
62 | free(np->exts[rqnext]); | |
63 | } | |
64 | ||
65 | int rq_isspam(nick *np) { | |
66 | rq_flood *lf; | |
67 | ||
68 | if (np->exts[rqnext] == NULL) { | |
69 | np->exts[rqnext] = lf = (rq_flood*)malloc(sizeof(rq_flood)); | |
70 | ||
71 | lf->count = 1; | |
72 | lf->created = getnettime(); | |
73 | lf->expire = 0; | |
74 | ||
75 | return 0; | |
76 | } else { | |
77 | lf = np->exts[rqnext]; | |
78 | ||
79 | lf->count -= (getnettime() - lf->created) / (RQ_SPAMBLOCK / RQ_SPAMCOUNT); | |
80 | ||
81 | if (lf->count < 0) | |
82 | lf->count = 0; | |
83 | ||
84 | if (lf->count > RQ_SPAMCOUNT && lf->expire > getnettime()) { | |
85 | return 1; | |
86 | } else { | |
87 | lf->count++; | |
88 | ||
89 | if (lf->count > RQ_SPAMCOUNT) { | |
90 | lf->expire = getnettime() + RQ_SPAMBLOCK; | |
91 | ||
92 | rq_addblock(np->authname, "Flooding the request system.", "request", 0, getnettime() + 3600); | |
93 | ||
94 | return 1; | |
95 | } | |
96 | ||
97 | return 0; | |
98 | } | |
99 | } | |
100 | } | |
101 | ||
102 | time_t rq_blocktime(nick *np) { | |
103 | if (np->exts[rqnext] == NULL) | |
104 | return 0; | |
105 | else | |
106 | return ((rq_flood*)np->exts[rqnext])->expire - getnettime(); | |
107 | } | |
108 | ||
109 | rq_block *rq_findblock(const char *pattern) { | |
110 | int i; | |
111 | rq_block block; | |
112 | ||
113 | for (i = rqblocks.cursi - 1; i >= 0; i--) { | |
114 | block = ((rq_block*)rqblocks.content)[i]; | |
115 | ||
116 | if (match2strings(block.pattern->content, pattern)) { | |
117 | if (block.expires != 0 && block.expires < getnettime()) | |
118 | rq_removeblock(block.pattern->content); | |
119 | else | |
120 | return &(((rq_block*)rqblocks.content)[i]); | |
121 | } | |
122 | } | |
123 | ||
124 | return NULL; | |
125 | } | |
126 | ||
127 | void rq_addblock(const char *pattern, const char *reason, const char *creator, time_t created, time_t expires) { | |
128 | int slot; | |
129 | rq_block *block; | |
130 | ||
131 | if (rq_findblock(pattern) != NULL) | |
132 | return; | |
133 | ||
134 | slot = array_getfreeslot(&rqblocks); | |
135 | ||
136 | block = &(((rq_block*)rqblocks.content)[slot]); | |
137 | ||
138 | block->pattern = getsstring(pattern, CHANNELLEN); | |
139 | block->reason = getsstring(reason, RQ_BLOCKLEN); | |
140 | block->creator = getsstring(creator, ACCOUNTLEN); | |
141 | block->created = created == 0 ? getnettime() : created; | |
142 | block->expires = expires; | |
143 | ||
144 | rq_saveblocks(); | |
145 | } | |
146 | ||
147 | int rq_removeblock(const char *pattern) { | |
148 | int i; | |
149 | rq_block block; | |
150 | ||
151 | for (i = 0; i < rqblocks.cursi; i++) { | |
152 | block = ((rq_block*)rqblocks.content)[i]; | |
153 | ||
154 | if (ircd_strcmp(block.pattern->content, pattern) == 0) { | |
155 | freesstring(block.pattern); | |
156 | freesstring(block.reason); | |
157 | freesstring(block.creator); | |
158 | ||
159 | array_delslot(&rqblocks, i); | |
160 | ||
161 | rq_saveblocks(); | |
162 | ||
163 | return 1; | |
164 | } | |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | /* pattern reason creator created expires */ | |
171 | int rq_parseline(char *line) { | |
172 | char pattern[CHANNELLEN+1]; | |
173 | char reason[RQ_BLOCKLEN+1]; | |
174 | char creator[ACCOUNTLEN+1]; | |
175 | time_t created, expires; | |
176 | ||
177 | 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 */ | |
178 | return 0; /* invalid block */ | |
179 | ||
180 | /* tell rq_addblock that it should not save the blocks to disk this time */ | |
181 | rq_loading = 1; | |
182 | rq_addblock(pattern, reason, creator, created, expires); | |
183 | rq_loading = 0; | |
184 | ||
185 | return 1; | |
186 | } | |
187 | ||
188 | int rq_loadblocks(void) { | |
189 | char line[4096]; | |
190 | FILE *rqdata; | |
191 | int count; | |
192 | ||
193 | rqdata = fopen(RQ_BLOCKFILE, "r"); | |
194 | ||
195 | if (rqdata == NULL) | |
196 | return 0; | |
197 | ||
198 | count = 0; | |
199 | ||
200 | while (!feof(rqdata)) { | |
201 | if (fgets(line, sizeof(line), rqdata) == NULL) | |
202 | break; | |
203 | ||
204 | if (line[strlen(line) - 1] == '\n') | |
205 | line[strlen(line) - 1] = '\0'; | |
206 | ||
207 | if (line[strlen(line) - 1] == '\r') | |
208 | line[strlen(line) - 1] = '\0'; | |
209 | ||
210 | if (line[0] != '\0') { | |
211 | if (rq_parseline(line)) | |
212 | count++; | |
213 | } | |
214 | } | |
215 | ||
216 | fclose(rqdata); | |
217 | ||
218 | return count; | |
219 | } | |
220 | ||
221 | int rq_saveblocks(void) { | |
222 | FILE *rqdata; | |
223 | int i, count = 0; | |
224 | ||
225 | /* don't save the blocks if we're currently loading them from the disk */ | |
226 | if (rq_loading) | |
227 | return 0; | |
228 | ||
229 | rqdata = fopen(RQ_BLOCKFILE, "w"); | |
230 | ||
231 | if (rqdata == NULL) | |
232 | return 0; | |
233 | ||
234 | rq_block block; | |
235 | ||
236 | for (i = 0; i < rqblocks.cursi; i++) { | |
237 | block = ((rq_block*)rqblocks.content)[i]; | |
238 | ||
239 | fprintf(rqdata, "%s %s %lu %lu %s\n", block.pattern->content, block.creator->content, block.created, block.expires, block.reason->content); | |
240 | } | |
241 | ||
242 | fclose(rqdata); | |
243 | ||
244 | return count; | |
245 | } |