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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* See LICENSE file for license details. */
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/time.h>
#define PINGTIMEOUT 300
#define MAXMSG 4096
static void die(const char *errstr, ...);
static void printl(char *channel, char *msg);
static void privmsg(char *channel, char *msg);
static void parsein(char *msg);
static void parsesrv(char *msg);
static int readl(int fd, unsigned int len, char *buf);
static char *host = "irc6.oftc.net";
static char *port = "6667";
static char *password = NULL;
static char nick[32];
static char bufin[MAXMSG], bufout[MAXMSG];
static char channel[256];
static int srv;
static time_t trespond;
void
die(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
void
printl(char *channel, char *msg) {
static char timestr[18];
time_t t = time(0);
strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg);
}
void
privmsg(char *channel, char *msg) {
if(channel[0] == 0)
return;
snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
printl(channel, bufout);
snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
write(srv, bufout, strlen(bufout));
}
void
parsein(char *msg) {
char *p;
if(msg[0] == 0)
return;
if(msg[0] != ':') {
privmsg(channel, msg);
return;
}
if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
else if(!strncmp(msg + 1, "l ", 2))
snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
else if(!strncmp(msg + 1, "m ", 2)) {
if((p = strchr(msg + 3, ' ')))
*(p++) = 0;
privmsg(msg + 3, p);
return;
}
else if(!strncmp(msg + 1, "s ", 2)) {
strncpy(channel, msg + 3, sizeof channel);
return;
}
else
snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
write(srv, bufout, strlen(bufout));
}
void
parsesrv(char *msg) {
char *chan, *cmd, *p, *txt, *usr;
txt = NULL;
usr = host;
if(!msg || !(*msg))
return;
if(msg[0] != ':')
cmd = msg;
else {
if(!(p = strchr(msg, ' ')))
return;
*p = 0;
usr = msg + 1;
cmd = ++p;
if((p = strchr(usr, '!')))
*p = 0;
}
for(p = cmd; *p; p++) /* remove CRLFs */
if(*p == '\r' || *p == '\n')
*p = 0;
if((p = strchr(cmd, ':'))) {
*p = 0;
txt = ++p;
}
if(!strncmp("PONG", cmd, 4))
return;
if(!strncmp("PRIVMSG", cmd, 7) && txt) {
if(!(p = strchr(cmd, ' ')))
return;
*p = 0;
chan = ++p;
for(; *p && *p != ' '; p++);
*p = 0;
snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
printl(chan, bufout);
}
else if(!strncmp("PING", cmd, 4) && txt) {
snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
write(srv, bufout, strlen(bufout));
}
else {
snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt ? txt : "");
printl(usr, bufout);
if(!strncmp("NICK", cmd, 4) && !strncmp(usr, nick, sizeof nick) && txt)
strncpy(nick, txt, sizeof nick);
}
}
int
readl(int fd, unsigned int len, char *buf) {
unsigned int i = 0;
char c;
do {
if(read(fd, &c, sizeof(char)) != sizeof(char))
return -1;
buf[i++] = c;
}
while(c != '\n' && i < len);
buf[i - 1] = 0;
return 0;
}
int
main(int argc, char *argv[]) {
int i;
struct timeval tv;
static struct addrinfo hints, *res, *r;
char ping[256];
fd_set rd;
strncpy(nick, getenv("USER"), sizeof nick);
for(i = 1; i < argc; i++)
if(!strncmp(argv[i], "-h", 3)) {
if(++i < argc) host = argv[i];
}
else if(!strncmp(argv[i], "-p", 3)) {
if(++i < argc) port = argv[i];
}
else if(!strncmp(argv[i], "-n", 3)) {
if(++i < argc) strncpy(nick, argv[i], sizeof nick);
}
else if(!strncmp(argv[i], "-k", 3)) {
if(++i < argc) password = argv[i];
}
else if(!strncmp(argv[i], "-v", 3))
die("sic-"VERSION", © 2005-2009 sic engineers\n");
else
die("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
/* init */
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if(getaddrinfo(host, port, &hints, &res) != 0)
die("error: cannot resolve hostname '%s'\n", host);
for(ri = res; r; r = r->ai_next) {
if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
continue;
if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
break;
close(srv);
}
freeaddrinfo(res);
if(!r)
die("error: cannot connect to host '%s'\n", host);
/* login */
if(password)
snprintf(bufout, sizeof bufout,
"PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
password, nick, nick, host, nick);
else
snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
nick, nick, host, nick);
write(srv, bufout, strlen(bufout));
snprintf(ping, sizeof ping, "PING %s\r\n", host);
channel[0] = 0;
setbuf(stdout, NULL); /* unbuffered stdout */
for(;;) { /* main loop */
FD_ZERO(&rd);
FD_SET(0, &rd);
FD_SET(srv, &rd);
tv.tv_sec = 120;
tv.tv_usec = 0;
i = select(srv + 1, &rd, 0, 0, &tv);
if(i < 0) {
if(errno == EINTR)
continue;
die("error: error on select()\n");
}
else if(i == 0) {
if(time(NULL) - trespond >= PINGTIMEOUT)
die("error: sic shutting down: parse timeout\n");
write(srv, ping, strlen(ping));
continue;
}
if(FD_ISSET(srv, &rd)) {
if(readl(srv, sizeof bufin, bufin) == -1)
die("error: remote host closed connection\n");
parsesrv(bufin);
trespond = time(NULL);
}
if(FD_ISSET(0, &rd)) {
if(readl(0, sizeof bufin, bufin) == -1)
die("error: broken pipe\n");
parsein(bufin);
}
}
return 0;
}
|
