-
Notifications
You must be signed in to change notification settings - Fork 257
/
udld.c
159 lines (141 loc) · 5.89 KB
/
udld.c
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
153
154
155
156
157
158
159
#include <stdint.h>
#if (HAVE_CONFIG_H)
#include "../include/config.h"
#endif
#include "./libnet_test.h"
#include <assert.h>
#define DEVICE_NAME "lo"
int
main(int argc, char *argv[])
{
(void)argc; /* unused */
int c;
libnet_t *l;
libnet_ptag_t t;
char errbuf[LIBNET_ERRBUF_SIZE];
size_t udld_payload_size = 0;
l = libnet_init(LIBNET_LINK, DEVICE_NAME, errbuf);
if (l == NULL)
{
fprintf(stderr, "libnet_init() failed: %s", errbuf);
return (EXIT_FAILURE);
}
/* [TLV SEQUENCE NUMBER ]*/
const uint32_t sequence_number = 1;
t = libnet_build_udld_sequence_number((const uint8_t *)&sequence_number, l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Sequence Number TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint32_t));
/* [TLV DEVICE NAME ]*/
const char *device_name_str = "S1";
t = libnet_build_udld_device_name((const uint8_t *)device_name_str, strlen(device_name_str), l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Device Name TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_name_str));
/* [TLV TIMEOUT INTERVAL ]*/
const uint8_t timeout_interval = 5;
t = libnet_build_udld_timeout_interval(&timeout_interval, l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Timeout Interval TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t));
/* [TLV MESSAGE INTERVAL ]*/
const uint8_t message_interval = 7;
t = libnet_build_udld_message_interval(&message_interval, l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Message Interval TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + sizeof(uint8_t));
/* [ TLV ECHO ] */
const uint8_t echo_id_pairs[] = {0x0, 0x0, 0x0, 0x0};
t = libnet_build_udld_echo(echo_id_pairs, (sizeof(echo_id_pairs)/sizeof(echo_id_pairs[0])), l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Echo TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + (sizeof(echo_id_pairs)/sizeof(echo_id_pairs[0])));
/* [ TLV PORT ID ] */
const char *port_id_str = "Gi0/1";
t = libnet_build_udld_port_id((const uint8_t *)port_id_str, strlen(port_id_str), l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Port ID TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(port_id_str));
/* [ TLV DEVICE ID ] */
const char *device_id_str = "FOC1031Z7JG";
t = libnet_build_udld_device_id((const uint8_t *)device_id_str, strlen(device_id_str), l, 0);
if (t == (-1))
{
fprintf(stderr, "Cannot build UDLD Device ID TLV: %s\n", libnet_geterror(l));
goto bad;
}
udld_payload_size += (LIBNET_UDLD_TLV_HDR_SIZE + strlen(device_id_str));
assert((udld_payload_size == 56) && "Incorrect UDLD payload size\n");
int flags = (LIBNET_UDLD_FLAG_RT | LIBNET_UDLD_FLAG_RSY);
t = libnet_build_udld_hdr(LIBNET_UDLD_PDU_VERSION, /* version */
LIBNET_UDLD_PDU_OPCODE_PROBE, /* opcode */
flags, /* flags */
0, /* checksum */
NULL, /* payload */
0, /* payload_s */
l, 0);
if (t == -1)
{
fprintf(stderr, "Can't build UDLD: %s\n", libnet_geterror(l));
goto bad;
}
uint8_t OUI[3] = LIBNET_UDLD_OID;
t = libnet_build_802_2snap(0xAA, /* DSAP */
0xAA, /* SSAP */
0x03, /* Control */
OUI, /* OUI */
LIBNET_UDLD_HDLC_PROTO_TYPE, /* Type */
NULL, /* Payload */
0, /* Payload_s */
l,
0);
uint8_t udld_dst_mac[6] = LIBNET_UDLD_DEST_MAC;
uint8_t udld_src_mac_dummy[6] = { 0x00, 0x19, 0x06, 0xEA, 0xB8, 0x81 };
t = libnet_build_802_3(udld_dst_mac, /* ethernet destination */
udld_src_mac_dummy, /* ethernet source */
LIBNET_802_2SNAP_H + /* */
LIBNET_UDLD_H + udld_payload_size, /* */
NULL, /* payload */
0, /* payload size */
l, /* libnet context */
0); /* libnet ptag */
if (t == -1)
{
fprintf(stderr, "Can't build 802.3 header: %s\n", libnet_geterror(l));
goto bad;
}
/* write the packet out */
c = libnet_write(l);
if (c == -1)
{
fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
goto bad;
}
else
{
fprintf(stderr, "Wrote %d byte LLDP frame \"%s\"\n", c, argv[2]);
}
libnet_destroy(l);
return (EXIT_SUCCESS);
bad:
libnet_destroy(l);
return (EXIT_FAILURE);
}