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
|
/*
* attr.c - Packet attributes
*
* Written 2002 by Werner Almesberger
* Copyright 2002 Werner Almesberger
*/
#include <netinet/if_ether.h>
#include "attr.h"
struct attributes no_attributes = {
.present = 0
};
struct attributes default_attributes = {
.present = attr_nfmark | attr_priority | attr_protocol | attr_tc_index,
.dflt = attr_nfmark | attr_priority | attr_protocol | attr_tc_index,
.nfmark = 0,
.priority = 0,
.protocol = ETH_P_IP,
.tc_index = 0,
};
#define MERGE(attr) \
if ((old.present & attr_##attr) && \
(!(new.present & attr_##attr) || \
(!(old.dflt & attr_##attr) && (new.dflt & attr_##attr)))) { \
new.attr = old.attr; \
new.present |= attr_##attr; \
new.dflt = (new.dflt & ~attr_##attr) | (old.dflt & attr_##attr); \
}
struct attributes merge_attributes(struct attributes old,
struct attributes new)
{
MERGE(nfmark);
MERGE(priority);
MERGE(protocol);
MERGE(tc_index);
return new;
}
|
