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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* Author: Jakub Kicinski <kubakici@wp.pl> */
#include <bfd.h>
#include <ctype.h>
#include <errno.h>
#include <linux/bpf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <bpf.h>
#include "main.h"
const char *bin_name;
static int last_argc;
static char **last_argv;
static int (*last_do_help)(int argc, char **argv);
void usage(void)
{
last_do_help(last_argc - 1, last_argv + 1);
exit(-1);
}
static int do_help(int argc, char **argv)
{
fprintf(stderr,
"Usage: %s OBJECT { COMMAND | help }\n"
" %s batch file FILE\n"
"\n"
" OBJECT := { prog | map }\n",
bin_name, bin_name);
return 0;
}
int cmd_select(const struct cmd *cmds, int argc, char **argv,
int (*help)(int argc, char **argv))
{
unsigned int i;
last_argc = argc;
last_argv = argv;
last_do_help = help;
if (argc < 1 && cmds[0].func)
return cmds[0].func(argc, argv);
for (i = 0; cmds[i].func; i++)
if (is_prefix(*argv, cmds[i].cmd))
return cmds[i].func(argc - 1, argv + 1);
help(argc - 1, argv + 1);
return -1;
}
bool is_prefix(const char *pfx, const char *str)
{
if (!pfx)
return false;
if (strlen(str) < strlen(pfx))
return false;
return !memcmp(str, pfx, strlen(pfx));
}
void print_hex(void *arg, unsigned int n, const char *sep)
{
unsigned char *data = arg;
unsigned int i;
for (i = 0; i < n; i++) {
const char *pfx = "";
if (!i)
/* nothing */;
else if (!(i % 16))
printf("\n");
else if (!(i % 8))
printf(" ");
else
pfx = sep;
printf("%s%02hhx", i ? pfx : "", data[i]);
}
}
static int do_batch(int argc, char **argv);
static const struct cmd cmds[] = {
{ "help", do_help },
{ "batch", do_batch },
{ "prog", do_prog },
{ "map", do_map },
{ 0 }
};
static int do_batch(int argc, char **argv)
{
unsigned int lines = 0;
char *n_argv[4096];
char buf[65536];
int n_argc;
FILE *fp;
int err;
if (argc < 2) {
err("too few parameters for batch\n");
return -1;
} else if (!is_prefix(*argv, "file")) {
err("expected 'file', got: %s\n", *argv);
return -1;
} else if (argc > 2) {
err("too many parameters for batch\n");
return -1;
}
NEXT_ARG();
fp = fopen(*argv, "r");
if (!fp) {
err("Can't open file (%s): %s\n", *argv, strerror(errno));
return -1;
}
while (fgets(buf, sizeof(buf), fp)) {
if (strlen(buf) == sizeof(buf) - 1) {
errno = E2BIG;
break;
}
n_argc = 0;
n_argv[n_argc] = strtok(buf, " \t\n");
while (n_argv[n_argc]) {
n_argc++;
if (n_argc == ARRAY_SIZE(n_argv)) {
err("line %d has too many arguments, skip\n",
lines);
n_argc = 0;
break;
}
n_argv[n_argc] = strtok(NULL, " \t\n");
}
if (!n_argc)
continue;
err = cmd_select(cmds, n_argc, n_argv, do_help);
if (err)
goto err_close;
lines++;
}
if (errno && errno != ENOENT) {
perror("reading batch file failed");
err = -1;
} else {
info("processed %d lines\n", lines);
err = 0;
}
err_close:
fclose(fp);
return err;
}
int main(int argc, char **argv)
{
bin_name = argv[0];
NEXT_ARG();
bfd_init();
return cmd_select(cmds, argc, argv, do_help);
}
|
