1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* flood.c: handle channel flooding.
*
* This attempts to give you some protection from flooding. Basically, it keeps
* track of how far apart (timewise) messages come in from different people.
* If a single nickname sends more than 3 messages in a row in under a
* second, this is considered flooding. It then activates the ON FLOOD with
* the nickname and type (appropriate for use with IGNORE).
*
* Thanks to Tomi Ollila <f36664r@puukko.hut.fi> for this one.
*/
#if 0
static char rcsid[] = "@(#)$Id: flood.c,v 1.5 1994/07/02 02:32:13 mrg Exp $";
#endif
#include "irc.h"
#include "flood.h"
#include "hook.h"
#include "ignore.h"
#include "ircaux.h"
#include "output.h"
#include "vars.h"
static char *ignore_types[NUMBER_OF_FLOODS] =
{
"MSG",
"PUBLIC",
"NOTICE",
"WALL",
"WALLOP"
};
typedef struct flood_stru
{
char nick[LONG_NICKNAME_LEN + 1];
int type;
char flood;
long cnt;
time_t start;
} Flooding;
static Flooding *flood = (Flooding *) 0;
/*
* check_flooding: This checks for message flooding of the type specified for
* the given nickname. This is described above. This will return 0 if no
* flooding took place, or flooding is not being monitored from a certain
* person. It will return 1 if flooding is being check for someone and an ON
* FLOOD is activated.
*/
#ifdef __STDC__
extern int check_flooding (char *nick, int type, char *line)
#else
extern int check_flooding(nick, type, line)
char *nick;
int type;
char *line;
#endif
{
static int users = 0,
pos = 0;
int i;
time_t flood_time,
diff;
Flooding *tmp;
if (users != get_int_var(FLOOD_USERS_VAR))
{
if ((users = get_int_var(FLOOD_USERS_VAR)) == 0)
return(1);
if (flood)
flood = (Flooding *) new_realloc((char *)flood,
sizeof(Flooding) * users);
else
flood = (Flooding *) new_malloc(sizeof(Flooding) *
users);
for (i = 0; i < users; i++)
{
*(flood[i].nick) = (char) 0;
flood[i].cnt = 0;
flood[i].flood = 0;
}
}
if (users == 0)
return (1);
for (i = 0; i < users; i++)
{
if (*(flood[i].nick))
{
if ((my_stricmp(nick, flood[i].nick) == 0) &&
(type == flood[i].type))
break;
}
}
flood_time = time(0);
if (i == users)
{
tmp = &(flood[pos]);
pos = (pos + 1) % users;
strmcpy(tmp->nick, nick,
#ifdef ALLOW_LONG_NICKNAMES
LONG_NICKNAME_LEN
#else
NICKNAME_LEN
#endif
);
tmp->type = type;
tmp->cnt = 1;
tmp->start = flood_time;
tmp->flood = 0;
return (1);
}
else
tmp = &(flood[i]);
tmp->cnt++;
diff = flood_time - tmp->start;
if (tmp->cnt > get_int_var(FLOOD_AFTER_VAR))
{
if ((diff == 0) || (tmp->cnt / diff) > get_int_var(FLOOD_RATE_VAR))
{
if (tmp->flood == 0)
{
if (get_int_var(FLOOD_WARNING_VAR))
say("%s flooding detected from %s", ignore_types[type], nick);
tmp->flood = 1;
}
return (do_hook(FLOOD_LIST, "%s %s %s", nick, ignore_types[type],line));
}
else
{
tmp->flood = 0;
tmp->cnt = 1;
tmp->start = flood_time;
}
}
return (1);
}
|
