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
|
/*
* pcap2pg.c: convert pcap input to pg input
*
* Copyright (c) 2013 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vnet/unix/pcap.h>
#include <vnet/ethernet/packet.h>
#include <stdio.h>
pcap_main_t pcap_main;
static char * pg_fmt =
"packet-generator new {\n"
" name s%d\n"
" limit 1\n"
" size %d-%d\n"
" node ethernet-input\n";
void stream_boilerplate (FILE *ofp, int i, u8 * pkt)
{
fformat(ofp, pg_fmt, i, vec_len(pkt), vec_len(pkt));
}
int pcap2pg (pcap_main_t * pm, FILE *ofp)
{
int i, j;
u8 *pkt;
for (i = 0; i < vec_len (pm->packets_read); i++)
{
int offset;
ethernet_header_t * h;
u64 ethertype;
pkt = pm->packets_read[i];
h = (ethernet_header_t *)pkt;
stream_boilerplate (ofp, i, pkt);
fformat (ofp, " data {\n");
ethertype = clib_net_to_host_u16 (h->type);
/*
* In vnet terms, packet generator interfaces are not ethernets.
* They don't have vlan tables.
* This dance transforms captured 802.1q VLAN packets into
* regular Ethernet packets.
*/
if (ethertype == 0x8100 /* 802.1q vlan */)
{
u16 * vlan_ethertype = (u16 *)(h+1);
ethertype = clib_net_to_host_u16(vlan_ethertype[0]);
offset = 18;
}
else
offset = 14;
fformat (ofp,
" 0x%04x: %02x%02x.%02x%02x.%02x%02x"
" -> %02x%02x.%02x%02x.%02x%02x\n",
ethertype,
h->src_address[0],
h->src_address[1],
h->src_address[2],
h->src_address[3],
h->src_address[4],
h->src_address[5],
h->dst_address[0],
h->dst_address[1],
h->dst_address[2],
h->dst_address[3],
h->dst_address[4],
h->dst_address[5]);
fformat (ofp, " hex 0x");
for (j = offset; j < vec_len (pkt); j++)
fformat (ofp, "%02x", pkt[j]);
fformat (ofp, " }\n");
fformat (ofp, "}\n\n");
}
return 0;
}
int main (int argc, char **argv)
{
unformat_input_t input;
pcap_main_t * pm = &pcap_main;
u8 * input_file = 0, * output_file = 0;
FILE * ofp;
clib_error_t * error;
unformat_init_command_line (&input, argv);
while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
{
if (unformat(&input, "-i %s", &input_file)
|| unformat (&input, "input %s", &input_file))
;
else if (unformat (&input, "-o %s", &output_file)
|| unformat (&input, "output %s", &output_file))
;
else
{
usage:
fformat(stderr,
"usage: pcap2pg -i <input-file> [-o <output-file>]\n");
exit (1);
}
}
if (input_file == 0)
goto usage;
pm->file_name = (char *)input_file;
error = pcap_read (pm);
if (error)
{
clib_error_report (error);
exit (1);
}
if (output_file)
{
ofp = fopen ((char *)output_file, "rw");
if (ofp == NULL)
clib_unix_warning ("Couldn't create '%s'", output_file);
exit (1);
}
else
{
ofp = stdout;
}
pcap2pg (pm, ofp);
fclose (ofp);
exit (0);
}
|
