blob: 51459ad6fc5de72ce56f367efc9872941e1822f5 (
plain) (
blame)
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
|
#include <ncmd.h>
int sanitize(char *cmd)
{
check(cmd != NULL, "cmd is NULL");
int len = strlen(cmd);
check(len > 0, "cmd empty");
// replace newline character with NUL.
for (int i = 0; i < len; i++) {
if (cmd[i] == '\n') {
cmd[i] = '\0';
break;
}
}
return 0;
error:
return -1;
}
char *check_cmd(char *cmd)
{
char *err = NULL;
check(cmd != NULL, "cmd is NULL");
int rc = sanitize(cmd);
check(rc != -1, "sanitize failed");
size_t len = strlen(cmd);
if (len >= CMD_MIN_SIZE && len <= CMD_MAX_SIZE) {
return NULL;
}
if (len == 0) {
err = "closing connection\n";
} else {
err = "command size invalid\n";
}
return err;
error:
err = "internal error\n";
return err;
}
|