frag.h

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/*
 * SPDX-FileCopyrightText: 2019 Freie Universität Berlin
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#include <stdbool.h>
#include <stdint.h>
 
#include "clist.h"
#include "net/gnrc/pkt.h"
#include "net/gnrc/pktbuf.h"
#include "net/ipv6/hdr.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define GNRC_IPV6_EXT_FRAG_RBUF_GC      (0xfe00U)

#define GNRC_IPV6_EXT_FRAG_CONTINUE     (0xfe01U)

#define GNRC_IPV6_EXT_FRAG_SEND         (0xfe02U)

typedef struct gnrc_ipv6_ext_frag_limits {
    struct gnrc_ipv6_ext_frag_limits *next; 
    uint16_t start;                         
    uint16_t end;                           
} gnrc_ipv6_ext_frag_limits_t;

typedef struct {
    gnrc_pktsnip_t *pkt;            
    gnrc_pktsnip_t *per_frag;       
    uint32_t id;                    
    uint16_t path_mtu;              
    uint16_t offset;                
} gnrc_ipv6_ext_frag_send_t;

typedef struct {
    gnrc_pktsnip_t *pkt;    
    ipv6_hdr_t *ipv6;       
    clist_node_t limits;
    uint32_t id;            
    uint32_t arrival;       
    uint16_t pkt_len;       
    uint8_t last;           
} gnrc_ipv6_ext_frag_rbuf_t;

typedef struct {
    unsigned rbuf_full;     
    unsigned frag_full;     
    unsigned datagrams;     
    unsigned fragments;     
} gnrc_ipv6_ext_frag_stats_t;

void gnrc_ipv6_ext_frag_init(void);

void gnrc_ipv6_ext_frag_send_pkt(gnrc_pktsnip_t *pkt, unsigned path_mtu);

void gnrc_ipv6_ext_frag_send(gnrc_ipv6_ext_frag_send_t *snd_buf);

gnrc_pktsnip_t *gnrc_ipv6_ext_frag_reass(gnrc_pktsnip_t *pkt);

gnrc_ipv6_ext_frag_rbuf_t *gnrc_ipv6_ext_frag_rbuf_get(ipv6_hdr_t *ipv6,
                                                       uint32_t id);

void gnrc_ipv6_ext_frag_rbuf_free(gnrc_ipv6_ext_frag_rbuf_t *rbuf);

static inline void gnrc_ipv6_ext_frag_rbuf_del(gnrc_ipv6_ext_frag_rbuf_t *rbuf)
{
    gnrc_pktbuf_release(rbuf->pkt);
    rbuf->pkt = NULL;
    gnrc_ipv6_ext_frag_rbuf_free(rbuf);
}

void gnrc_ipv6_ext_frag_rbuf_gc(void);

gnrc_ipv6_ext_frag_stats_t *gnrc_ipv6_ext_frag_stats(void);
 
#ifdef __cplusplus
}
#endif