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| | // SPDX-License-Identifier: GPL-2.0-or-later
/* PESTO - Programmable Extensible Socket Translation Orchestrator
* front-end for passt(1) and pasta(1) forwarding configuration
*
* pesto.c - Main program (it's not actually extensible)
*
* Copyright (c) 2026 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
#include <arpa/inet.h>
#include <sys/prctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
#include <getopt.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <linux/audit.h>
#include <linux/capability.h>
#include <linux/filter.h>
#include <linux/seccomp.h>
#include "common.h"
#include "seccomp_pesto.h"
#include "pesto.h"
static bool debug_flag = false;
static char stdout_buf[BUFSIZ];
#define die(...) \
do { \
FPRINTF(stderr, __VA_ARGS__); \
FPRINTF(stderr, "\n"); \
exit(EXIT_FAILURE); \
} while (0)
/**
* usage() - Print usage, exit with given status code
* @name: Executable name
* @f: Stream to print usage info to
* @status: Status code for exit(2)
*
* #syscalls:pesto exit_group fstat write
*/
static void usage(const char *name, FILE *f, int status)
{
FPRINTF(f, "Usage: %s [OPTION]... PATH\n", name);
FPRINTF(f,
"\n"
" -d, --debug Print debugging messages\n"
" -h, --help Display this help message and exit\n"
" --version Show version and exit\n");
exit(status);
}
/**
* main() - Dynamic reconfiguration client main program
* @argc: Argument count
* @argv: Arguments: socket path, operation, port specifiers
*
* Return: 0 on success, won't return on failure
*
* #syscalls:pesto exit_group fstat read write
*/
int main(int argc, char **argv)
{
const struct option options[] = {
{"debug", no_argument, NULL, 'd' },
{"help", no_argument, NULL, 'h' },
{"version", no_argument, NULL, 1 },
{ 0 },
};
const char *optstring = "dh";
struct sock_fprog prog;
int optname;
prctl(PR_SET_DUMPABLE, 0);
prog.len = (unsigned short)sizeof(filter_pesto) /
sizeof(filter_pesto[0]);
prog.filter = filter_pesto;
if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) ||
prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog))
die("Failed to apply seccomp filter");
/* Explicitly set stdout buffer, otherwise printf() might allocate,
* breaking our seccomp profile.
*/
if (setvbuf(stdout, stdout_buf, _IOFBF, sizeof(stdout_buf)))
die("Failed to set stdout buffer");
do {
optname = getopt_long(argc, argv, optstring, options, NULL);
switch (optname) {
case -1:
case 0:
break;
case 'h':
usage(argv[0], stdout, EXIT_SUCCESS);
break;
case 'd':
debug_flag = true;
break;
case 1:
FPRINTF(stdout, "pesto ");
FPRINTF(stdout, VERSION_BLOB);
exit(EXIT_SUCCESS);
default:
usage(argv[0], stderr, EXIT_FAILURE);
}
} while (optname != -1);
if (argc - optind != 1)
usage(argv[0], stderr, EXIT_FAILURE);
printf("debug_flag=%d, path=\"%s\"\n", debug_flag, argv[optind]);
die("pesto is not implemented yet");
}
|