Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
|
-
Property svn:eol-style
set to
native
-
Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
|
File size:
988 bytes
|
Line | |
---|
1 | #include <resolv.h>
|
---|
2 | #include <string.h>
|
---|
3 | #include <time.h>
|
---|
4 | #include "libc.h"
|
---|
5 |
|
---|
6 | int __res_mkquery(int op, const char *dname, int class, int type,
|
---|
7 | const unsigned char *data, int datalen,
|
---|
8 | const unsigned char *newrr, unsigned char *buf, int buflen)
|
---|
9 | {
|
---|
10 | int id, i, j;
|
---|
11 | unsigned char q[280];
|
---|
12 | struct timespec ts;
|
---|
13 | size_t l = strnlen(dname, 255);
|
---|
14 | int n;
|
---|
15 |
|
---|
16 | if (l && dname[l-1]=='.') l--;
|
---|
17 | n = 17+l+!!l;
|
---|
18 | if (l>253 || buflen<n || op>15u || class>255u || type>255u)
|
---|
19 | return -1;
|
---|
20 |
|
---|
21 | /* Construct query template - ID will be filled later */
|
---|
22 | memset(q, 0, n);
|
---|
23 | q[2] = op*8 + 1;
|
---|
24 | q[5] = 1;
|
---|
25 | memcpy((char *)q+13, dname, l);
|
---|
26 | for (i=13; q[i]; i=j+1) {
|
---|
27 | for (j=i; q[j] && q[j] != '.'; j++);
|
---|
28 | if (j-i-1u > 62u) return -1;
|
---|
29 | q[i-1] = j-i;
|
---|
30 | }
|
---|
31 | q[i+1] = type;
|
---|
32 | q[i+3] = class;
|
---|
33 |
|
---|
34 | /* Make a reasonably unpredictable id */
|
---|
35 | clock_gettime(CLOCK_REALTIME, &ts);
|
---|
36 | id = ts.tv_nsec + ts.tv_nsec/65536UL & 0xffff;
|
---|
37 | q[0] = id/256;
|
---|
38 | q[1] = id;
|
---|
39 |
|
---|
40 | memcpy(buf, q, n);
|
---|
41 | return n;
|
---|
42 | }
|
---|
43 |
|
---|
44 | weak_alias(__res_mkquery, res_mkquery);
|
---|
Note:
See
TracBrowser
for help on using the repository browser.