gnrc_tcp_pkt.h

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/*
 * SPDX-FileCopyrightText: 2015-2017 Simon Brummer
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#include <stdint.h>
#include "net/gnrc.h"
#include "net/gnrc/tcp/tcb.h"
 
#ifdef __cplusplus
extern "C" {
#endif

int _gnrc_tcp_pkt_build_reset_from_pkt(gnrc_pktsnip_t **out_pkt,
                                       gnrc_pktsnip_t *in_pkt);

int _gnrc_tcp_pkt_build(gnrc_tcp_tcb_t *tcb, gnrc_pktsnip_t **out_pkt,
                        uint16_t *seq_con, const uint16_t ctl,
                        const uint32_t seq_num, const uint32_t ack_num,
                        void *payload, const size_t payload_len);

int _gnrc_tcp_pkt_send(gnrc_tcp_tcb_t *tcb, gnrc_pktsnip_t *out_pkt,
                       const uint16_t seq_con, const bool retransmit);

int _gnrc_tcp_pkt_chk_seq_num(const gnrc_tcp_tcb_t *tcb, const uint32_t seq_num,
                              const uint32_t seg_len);

uint32_t _gnrc_tcp_pkt_get_seg_len(gnrc_pktsnip_t *pkt);

uint32_t _gnrc_tcp_pkt_get_pay_len(gnrc_pktsnip_t *pkt);

int _gnrc_tcp_pkt_setup_retransmit(gnrc_tcp_tcb_t *tcb, gnrc_pktsnip_t *pkt,
                                   const bool retransmit);

int _gnrc_tcp_pkt_acknowledge(gnrc_tcp_tcb_t *tcb, const uint32_t ack);

uint16_t _gnrc_tcp_pkt_calc_csum(const gnrc_pktsnip_t *hdr,
                                 const gnrc_pktsnip_t *pseudo_hdr,
                                 const gnrc_pktsnip_t *payload);
 
#ifdef __cplusplus
}
#endif