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/*
*****************************************************************************
*
* File: fw_util_ipf.c
*
* Author: Damien S. Stuart
*
* Purpose: Fwknop routines for managing ipf firewall rules.
*
* Copyright 2010 Damien Stuart (dstuart@dstuart.org)
*
* License (GNU Public License):
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*****************************************************************************
*/
#include "fwknopd_common.h"

#if FIREWALL_IPF

#include "fw_util.h"
#include "utils.h"
#include "log_msg.h"
#include "extcmd.h"
#include "access.h"

static struct fw_config fwc;
static char cmd_buf[CMD_BUFSIZE];
static char err_buf[CMD_BUFSIZE];
static char cmd_out[STANDARD_CMD_OUT_BUFSIZE];

/* Print all firewall rules currently instantiated by the running fwknopd
* daemon to stdout.
*/
int
fw_dump_rules(const fko_srv_options_t *opts)
{
    int i;
    int res, got_err = 0;

    fprintf(stdout, "Listing fwknopd ipf rules...\n");
    fflush(stdout);

    zero_cmd_buffers();

    /* TODO: Implement or get rid of me */

    return(got_err);
}

void
fw_config_init(fko_srv_options_t *opts)
{
    /* TODO: Implement me */

    memset(&fwc, 0x0, sizeof(struct fw_config));

    /* Set our firewall exe command path (iptables in most cases).
*/
    strlcpy(fwc.fw_command, opts->config[CONF_FIREWALL_EXE], MAX_PATH_LEN);


    /* Let us find it via our opts struct as well.
*/
    opts->fw_config = &fwc;

    return;
}

void
fw_initialize(const fko_srv_options_t *opts)
{
    int res = 0;

    /* TODO: Implement me */

    if(res != 0)
    {
        fprintf(stderr, "Warning: Errors detected during fwknop custom chain creation.\n");
        clean_exit(opts, NO_FW_CLEANUP, EXIT_FAILURE);
    }
}

int
fw_cleanup(void)
{

    /* TODO: Implement or get rid of me */

    return(0);
}

/****************************************************************************/

/* Rule Processing - Create an access request...
*/
int
process_spa_request(const fko_srv_options_t *opts, const acc_stanza_t *acc, spa_data_t *spadat)
{
    /* TODO: Implement me */

    char nat_ip[MAX_IPV4_STR_LEN] = {0};
    char *ndx;

    unsigned int nat_port = 0;;

    acc_port_list_t *port_list = NULL;
    acc_port_list_t *ple;

    unsigned int fst_proto;
    unsigned int fst_port;

    int res = 0;
    time_t now;
    unsigned int exp_ts;

    /* Parse and expand our access message.
*/
    expand_acc_port_list(&port_list, spadat->spa_message_remain);

    /* Start at the top of the proto-port list...
*/
    ple = port_list;

    /* Remember the first proto/port combo in case we need them
* for NAT access requests.
*/
    fst_proto = ple->proto;
    fst_port = ple->port;

    /* Set our expire time value.
*/
    time(&now);
    exp_ts = now + spadat->fw_access_timeout;

    /* TODO: Implement me */

    return(res);
}

/* Iterate over the configure firewall access chains and purge expired
* firewall rules.
*/
void
check_firewall_rules(const fko_srv_options_t *opts)
{

    /* TODO: Implement me */

    char exp_str[12];
    char rule_num_str[6];
    char *ndx, *rn_start, *rn_end, *tmp_mark;

    int i, res, rn_offset;
    time_t now, rule_exp, min_exp = 0;

    time(&now);

    zero_cmd_buffers();
}

#endif /* FIREWALL_IPF */

/***EOF***/
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