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/*
* 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
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