/*
 * jail.h
 * potd is licensed under the BSD license:
 *
 * Copyright (c) 2018 Toni Uhlig <matzeton@googlemail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - 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 names of its contributors may not be used to endorse or promote
 *   products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef POTD_JAIL_H
#define POTD_JAIL_H 1

#include <sys/types.h>
#include <unistd.h>

#include "forward.h"
#include "pevent.h"

#define MIN_STACKSIZE 2048
#define MAX_STACKSIZE BUFSIZ

#define EMPTY_JAILCON { -1, -1 }

typedef struct jail_ctx {
    forward_ctx fwd_ctx;
    char host_buf[NI_MAXHOST], service_buf[NI_MAXSERV];
    size_t stacksize;
    void *stack_ptr;
    void *stack_beg;
    char *newroot;
} jail_ctx;

typedef struct jail_con {
    int client_fd;
    int jail_fd;
} jail_con;


void jail_init_ctx(jail_ctx **ctx, size_t stacksize);

int jail_setup(jail_ctx *ctx,
               const char *listen_addr, const char *listen_port);

int jail_validate_ctx(const jail_ctx *jail_ctx);

int jail_setup_event(jail_ctx *ctx[], size_t siz, event_ctx **ev_ctx);

pid_t jail_daemonize(event_ctx **ev_ctx, jail_ctx *ctx[], size_t siz);

#endif