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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* iplink_ipvlan.c IPVLAN/IPVTAP device support
*
* Authors: Mahesh Bandewar <maheshb@google.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <linux/if_link.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
static void print_explain(struct link_util *lu, FILE *f)
{
fprintf(f,
"Usage: ... %s [ mode MODE ] [ FLAGS ]\n"
"\n"
"MODE: l3 | l3s | l2\n"
"FLAGS: bridge | private | vepa\n"
"(first values are the defaults if nothing is specified).\n",
lu->id);
}
static int ipvlan_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
__u16 flags = 0;
bool mflag_given = false;
while (argc > 0) {
if (matches(*argv, "mode") == 0) {
__u16 mode = 0;
NEXT_ARG();
if (strcmp(*argv, "l2") == 0)
mode = IPVLAN_MODE_L2;
else if (strcmp(*argv, "l3") == 0)
mode = IPVLAN_MODE_L3;
else if (strcmp(*argv, "l3s") == 0)
mode = IPVLAN_MODE_L3S;
else {
fprintf(stderr, "Error: argument of \"mode\" must be either \"l2\", \"l3\" or \"l3s\"\n");
return -1;
}
addattr16(n, 1024, IFLA_IPVLAN_MODE, mode);
} else if (matches(*argv, "private") == 0 && !mflag_given) {
flags |= IPVLAN_F_PRIVATE;
mflag_given = true;
} else if (matches(*argv, "vepa") == 0 && !mflag_given) {
flags |= IPVLAN_F_VEPA;
mflag_given = true;
} else if (matches(*argv, "bridge") == 0 && !mflag_given) {
mflag_given = true;
} else if (matches(*argv, "help") == 0) {
print_explain(lu, stderr);
return -1;
} else {
fprintf(stderr, "%s: unknown option \"%s\"?\n",
lu->id, *argv);
print_explain(lu, stderr);
return -1;
}
argc--;
argv++;
}
addattr16(n, 1024, IFLA_IPVLAN_FLAGS, flags);
return 0;
}
static void ipvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
if (!tb)
return;
if (tb[IFLA_IPVLAN_MODE]) {
if (RTA_PAYLOAD(tb[IFLA_IPVLAN_MODE]) == sizeof(__u16)) {
__u16 mode = rta_getattr_u16(tb[IFLA_IPVLAN_MODE]);
const char *mode_str = mode == IPVLAN_MODE_L2 ? "l2" :
mode == IPVLAN_MODE_L3 ? "l3" :
mode == IPVLAN_MODE_L3S ? "l3s" : "unknown";
print_string(PRINT_ANY, "mode", " mode %s ", mode_str);
}
}
if (tb[IFLA_IPVLAN_FLAGS]) {
if (RTA_PAYLOAD(tb[IFLA_IPVLAN_FLAGS]) == sizeof(__u16)) {
__u16 flags = rta_getattr_u16(tb[IFLA_IPVLAN_FLAGS]);
if (flags & IPVLAN_F_PRIVATE)
print_bool(PRINT_ANY, "private", "private ",
true);
else if (flags & IPVLAN_F_VEPA)
print_bool(PRINT_ANY, "vepa", "vepa ",
true);
else
print_bool(PRINT_ANY, "bridge", "bridge ",
true);
}
}
}
static void ipvlan_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_explain(lu, f);
}
struct link_util ipvlan_link_util = {
.id = "ipvlan",
.maxattr = IFLA_IPVLAN_MAX,
.parse_opt = ipvlan_parse_opt,
.print_opt = ipvlan_print_opt,
.print_help = ipvlan_print_help,
};
struct link_util ipvtap_link_util = {
.id = "ipvtap",
.maxattr = IFLA_IPVLAN_MAX,
.parse_opt = ipvlan_parse_opt,
.print_opt = ipvlan_print_opt,
.print_help = ipvlan_print_help,
};
|
