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
|
/* SPDX-License-Identifier: GPL-2.0 */
#include <stdio.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include "libnetlink.h"
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "json_print.h"
#define BAREUDP_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
static void print_explain(FILE *f)
{
fprintf(f,
"Usage: ... bareudp dstport PORT\n"
" ethertype PROTO\n"
" [ srcportmin PORT ]\n"
" [ [no]multiproto ]\n"
"\n"
"Where: PORT := UDP_PORT\n"
" PROTO := ETHERTYPE\n"
"\n"
"Note: ETHERTYPE can be given as number or as protocol name (\"ipv4\", \"ipv6\",\n"
" \"mpls_uc\", etc.).\n"
);
}
static void explain(void)
{
print_explain(stderr);
}
static void check_duparg(__u64 *attrs, int type, const char *key,
const char *argv)
{
if (!BAREUDP_ATTRSET(*attrs, type)) {
*attrs |= (1L << type);
return;
}
duparg2(key, argv);
}
static int bareudp_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
bool multiproto = false;
__u16 srcportmin = 0;
__be16 ethertype = 0;
__be16 dstport = 0;
__u64 attrs = 0;
while (argc > 0) {
if (matches(*argv, "dstport") == 0) {
NEXT_ARG();
check_duparg(&attrs, IFLA_BAREUDP_PORT, "dstport",
*argv);
if (get_be16(&dstport, *argv, 0))
invarg("dstport", *argv);
} else if (matches(*argv, "ethertype") == 0) {
NEXT_ARG();
check_duparg(&attrs, IFLA_BAREUDP_ETHERTYPE,
"ethertype", *argv);
if (ll_proto_a2n(ðertype, *argv))
invarg("ethertype", *argv);
} else if (matches(*argv, "srcportmin") == 0) {
NEXT_ARG();
check_duparg(&attrs, IFLA_BAREUDP_SRCPORT_MIN,
"srcportmin", *argv);
if (get_u16(&srcportmin, *argv, 0))
invarg("srcportmin", *argv);
} else if (matches(*argv, "multiproto") == 0) {
check_duparg(&attrs, IFLA_BAREUDP_MULTIPROTO_MODE,
*argv, *argv);
multiproto = true;
} else if (matches(*argv, "nomultiproto") == 0) {
check_duparg(&attrs, IFLA_BAREUDP_MULTIPROTO_MODE,
*argv, *argv);
multiproto = false;
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "bareudp: unknown command \"%s\"?\n",
*argv);
explain();
return -1;
}
argc--, argv++;
}
if (!BAREUDP_ATTRSET(attrs, IFLA_BAREUDP_PORT))
missarg("dstport");
if (!BAREUDP_ATTRSET(attrs, IFLA_BAREUDP_ETHERTYPE))
missarg("ethertype");
addattr16(n, 1024, IFLA_BAREUDP_PORT, dstport);
addattr16(n, 1024, IFLA_BAREUDP_ETHERTYPE, ethertype);
if (BAREUDP_ATTRSET(attrs, IFLA_BAREUDP_SRCPORT_MIN))
addattr16(n, 1024, IFLA_BAREUDP_SRCPORT_MIN, srcportmin);
if (multiproto)
addattr(n, 1024, IFLA_BAREUDP_MULTIPROTO_MODE);
return 0;
}
static void bareudp_print_opt(struct link_util *lu, FILE *f,
struct rtattr *tb[])
{
if (!tb)
return;
if (tb[IFLA_BAREUDP_PORT])
print_uint(PRINT_ANY, "dstport", "dstport %u ",
rta_getattr_be16(tb[IFLA_BAREUDP_PORT]));
if (tb[IFLA_BAREUDP_ETHERTYPE]) {
struct rtattr *attr = tb[IFLA_BAREUDP_ETHERTYPE];
SPRINT_BUF(ethertype);
print_string(PRINT_ANY, "ethertype", "ethertype %s ",
ll_proto_n2a(rta_getattr_u16(attr),
ethertype, sizeof(ethertype)));
}
if (tb[IFLA_BAREUDP_SRCPORT_MIN])
print_uint(PRINT_ANY, "srcportmin", "srcportmin %u ",
rta_getattr_u16(tb[IFLA_BAREUDP_SRCPORT_MIN]));
if (tb[IFLA_BAREUDP_MULTIPROTO_MODE])
print_bool(PRINT_ANY, "multiproto", "multiproto ", true);
else
print_bool(PRINT_ANY, "multiproto", "nomultiproto ", false);
}
static void bareudp_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_explain(f);
}
struct link_util bareudp_link_util = {
.id = "bareudp",
.maxattr = IFLA_BAREUDP_MAX,
.parse_opt = bareudp_parse_opt,
.print_opt = bareudp_print_opt,
.print_help = bareudp_print_help,
};
|
