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/*
* 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 <linux/version.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"
" %s version\n"
"\n"
" OBJECT := { prog | map }\n",
bin_name, bin_name, bin_name);
return 0;
}
static int do_version(int argc, char **argv)
{
printf("%s v%d.%d.%d\n", bin_name,
LINUX_VERSION_CODE >> 16,
LINUX_VERSION_CODE >> 8 & 0xf,
LINUX_VERSION_CODE & 0xf);
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 fprint_hex(FILE *f, 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))
fprintf(f, "\n");
else if (!(i % 8))
fprintf(f, " ");
else
pfx = sep;
fprintf(f, "%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 },
{ "version", do_version },
{ 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);
}
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