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/** \file
* \brief The recon worker
*/
/*
* Copyright (c) 2019-2021 David Timber <mieabby@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* 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.
*/
#pragma once
#include "pth.h"
#include "protocol.h"
#include <mbedtls/ctr_drbg.h>
/* Alias and forward declarations */
/**
* \brief The opauqe handle type to an instance of the recon worker. Reserved
* for future use.
*/
typedef struct prne_recon prne_recon_t;
typedef struct prne_recon_param prne_recon_param_t;
typedef struct prne_recon_network prne_recon_network_t;
typedef void(*prne_recon_evt_ft)(void *ctx, const prne_net_endpoint_t *ep);
// The recon network object
struct prne_recon_network {
prne_ip_addr_t addr;
uint8_t mask[16]; // The netmask bits in the network order
};
// The recon worker parameter object
struct prne_recon_param {
// The blacklisted networks
struct {
prne_recon_network_t *arr;
size_t cnt;
} blist;
// The target networks
struct {
prne_recon_network_t *arr;
size_t cnt;
} target;
// The destination ports in SYN packets
struct {
uint16_t *arr;
size_t cnt;
} ports;
prne_recon_evt_ft evt_cb; // The discovery event callback function
void *cb_ctx; // The context object for event callbacks
/*
* True if the object has the responsibility of freeing the dynamically
* allocated members
*/
bool ownership;
};
/**
* \brief Allocate resources and start an instance of the recon worker
* \param wkr The initialised worker object
* \param ctr_drbg The CTR DRBG object to use for initial random values
* \param param The recon worker parameter object
* \return A handle to the instance
* \retval NULL if an error occurred. \c errno set.
*/
prne_recon_t *prne_alloc_recon (
prne_worker_t *wkr,
mbedtls_ctr_drbg_context *ctr_drbg,
const prne_recon_param_t *param);
/**
* \brief Initialise the recon worker parameter object
* \note Initialises the members of \p p to initial values. Prepares \p p so
* that it can be freed using \c prne_free_recon_param()
*/
void prne_init_recon_param (prne_recon_param_t *p);
/**
* \brief Free the resources allocated for the recon worker parameter object
* \param p The pointer to the object that has been initialised using
* \c prne_init_recon_param()
*/
void prne_free_recon_param (prne_recon_param_t *p);
/**
* \brief Allocate dynamically allocated members in the recon worker parameter
* object
* \param p The pointer to the recon worker parameter object
* \param blist The number of blacklisted networks
* \param target The number of target networks
* \param ports The number of the destination ports in SYN packets
* \retval true if allocation was successful
* \retval false otherwise and \c errno is set to \c ENOMEM
*/
bool prne_alloc_recon_param (
prne_recon_param_t *p,
const size_t blist,
const size_t target,
const size_t ports);
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