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
|
/* bounce 4 all
* 1999 (c) scut
*
* relay routines
*/
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "client.h"
#include "network.h"
#include "relay.h"
void
rly_client (client *cl)
{
int n, i = 0, maxfd;
int bc = 1;
char cbuff[4096], sbuff[4096];
fd_set chainset;
struct timeval tval;
pthread_mutex_lock (&cl->cl_mutex);
/* now, since we authorized us, we should just chain every control
* connection command except it is in our parser array, in this case
* we should call the parser function :)
*/
pthread_mutex_unlock (&cl->cl_mutex);
memset (cbuff, '\0', sizeof (cbuff));
memset (sbuff, '\0', sizeof (sbuff));
while (bc) {
pthread_mutex_lock (&cl->cl_mutex);
FD_ZERO (&chainset);
FD_SET (cl->cs, &chainset);
FD_SET (cl->ss, &chainset);
maxfd = ((cl->cs > cl->ss) ? cl->cs : cl->ss) + 1;
tval.tv_sec = 1;
tval.tv_usec = 0;
/* choose a dual approach, a bit polling (once per second, but also
* select, to let the mutex live
*/
n = select (maxfd, &chainset, NULL, NULL, &tval);
switch (n) {
case (0): break;
case (-1): return;
default: if (FD_ISSET (cl->cs, &chainset)) {
i = rly_rb (cl->cs, cbuff, sizeof (cbuff));
if (i <= 0) {
bc = 0;
} else {
rly_clparse (cl, cbuff, sizeof (cbuff));
}
} else if (FD_ISSET (cl->ss, &chainset)) {
i = rly_rb (cl->ss, sbuff, sizeof (sbuff));
if (i <= 0) {
bc = 0;
} else {
rly_srvparse (cl, sbuff, sizeof (sbuff));
}
}
break;
}
pthread_mutex_unlock (&cl->cl_mutex);
}
switch (i) {
case (0): printf ("connection close\n");
break;
case (-1): printf ("system error (%d)\n", errno);
break;
case (-2): printf ("buffer too short to hold all recv data\n");
break;
default: printf ("weird i = %d\n", i);
break;
}
return;
}
int
rly_clparse (client *cl, char *buffer, int buflen)
{
int r, n, llen, prslen;
while ((llen = net_tline (buffer, buflen)) != -1) {
/* if (strncmp (buffer, "USER", 4) == 0) {
char *a, *b;
int n;
n = sscanf (buffer, "USER %a[^ ] \"%*[^\"]\" \"%*[^\"]\"%*[^:]:%as\n",
&a, &b);
if (n != 2) {
printf ("wrong user command: %s\n", buffer);
goto pfft;
}
net_write (cl->ss, "USER %s \"%s\" \"%s\" :%s", a, cl->connip, cl->ircip, b);
goto mhhh;
}
*/
/* if line was terminated, replace \n with \0 */
pfft: buffer[llen-1] = '\0';
net_write (cl->ss, "%s\n", buffer);
mhhh: memmove (buffer, buffer + llen, buflen - llen);
memset (buffer + (buflen - llen), '\0', llen);
}
return (1);
}
int
rly_srvparse (client *cl, char *buffer, int buflen)
{
int code, r, n, llen;
while ((llen = net_tline (buffer, buflen)) != -1) {
buffer[llen-1] = '\0';
net_write (cl->cs, "%s\n", buffer);
memmove (buffer, buffer + llen, buflen - llen);
memset (buffer + (buflen - llen), '\0', llen);
}
return (1);
}
int
rly_rb (int fd, char *buffer, int buflen)
{
int n, csize;
/* assume asciiz buffer, line based,
* now append the read data to this buffer
*/
csize = strlen (buffer);
if (csize >= (buflen - 1))
return (-2); /* buffer size exceeded, lame script kiddie */
n = read (fd, buffer + csize, buflen - csize - 1);
switch (n) {
case (0): return (0);
case (-1): return (-1);
default: return (strlen (buffer));
}
/* should never happen */
return (0);
}
|
