ndp.h

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/*
 * SPDX-FileCopyrightText: 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#include <stdint.h>
 
#include "byteorder.h"
#include "net/ipv6/addr.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define NDP_RTR_ADV_FLAGS_MASK      (0xc0)
#define NDP_RTR_ADV_FLAGS_M         (0x80)  
#define NDP_RTR_ADV_FLAGS_O         (0x40)  

#define NDP_RTR_ADV_CUR_HL_UNSPEC   (0) 

#define NDP_RTR_ADV_LTIME_SEC_MAX   (9000)

#define NDP_NBR_ADV_LTIME_NOT_DR    (0)
 
#define NDP_NBR_ADV_REACH_TIME      (0)     
#define NDP_NBR_ADV_RETRANS_TIMER   (0)     

#define NDP_NBR_ADV_FLAGS_MASK      (0xe0)
#define NDP_NBR_ADV_FLAGS_R         (0x80)  
#define NDP_NBR_ADV_FLAGS_S         (0x40)  
#define NDP_NBR_ADV_FLAGS_O         (0x20)  

#define NDP_OPT_SL2A                (1)     
#define NDP_OPT_TL2A                (2)     
#define NDP_OPT_PI                  (3)     
#define NDP_OPT_RH                  (4)     
#define NDP_OPT_MTU                 (5)     
#define NDP_OPT_RI                  (24)    
#define NDP_OPT_RDNSS               (25)    
#define NDP_OPT_AR                  (33)    
#define NDP_OPT_6CTX                (34)    
#define NDP_OPT_ABR                 (35)    

#define NDP_OPT_PI_FLAGS_MASK       (0xc0)
#define NDP_OPT_PI_FLAGS_L          (0x80)  
#define NDP_OPT_PI_FLAGS_A          (0x40)  

#define NDP_OPT_RI_FLAGS_MASK       (0x18)
#define NDP_OPT_RI_FLAGS_PRF_NONE   (0x10)  
#define NDP_OPT_RI_FLAGS_PRF_NEG    (0x18)  
#define NDP_OPT_RI_FLAGS_PRF_ZERO   (0x0)   
#define NDP_OPT_RI_FLAGS_PRF_POS    (0x8)   

#define NDP_OPT_PI_VALID_LTIME_INF  (UINT32_MAX)    
#define NDP_OPT_PI_PREF_LTIME_INF   (UINT32_MAX)    

#define NDP_OPT_PI_LEN              (4U)
#define NDP_OPT_MTU_LEN             (1U)

#define NDP_OPT_RDNSS_MIN_LEN       (3U)

#define NDP_MAX_INIT_RA_INTERVAL        (16000U)   
#define NDP_MAX_INIT_RA_NUMOF           (3U)       
#define NDP_MAX_FIN_RA_NUMOF            (3U)       
#define NDP_MIN_MS_DELAY_BETWEEN_RAS    (3000U)    
#define NDP_MAX_RA_DELAY                (500U)     
#define NDP_MAX_RA_INTERVAL_MS          (600000U)  
#define NDP_MIN_RA_INTERVAL_MS          (198000U)  
#define NDP_RTR_LTIME_SEC               (1800U)    

#define NDP_MAX_RS_MS_DELAY         (1000U)     
#define NDP_RS_MS_INTERVAL          (4000U)     
#define NDP_MAX_RS_NUMOF            (3U)        

#define NDP_MAX_MC_SOL_NUMOF        (3U)        
#define NDP_MAX_UC_SOL_NUMOF        (3U)        

#define NDP_DAD_TRANSMIT_NUMOF      (1U)
#define NDP_MAX_ANYCAST_MS_DELAY    (1000U)     
#define NDP_MAX_NA_NUMOF            (3U)        
#define NDP_REACH_MS                (30000U)    
#define NDP_RETRANS_TIMER_MS        (1000U)     
#define NDP_MAX_RETRANS_TIMER_MS    (60000U)

#define NDP_MAX_NS_NUMOF            (17U)
#define NDP_DELAY_FIRST_PROBE_MS    (5000U)     
#define NDP_MIN_RANDOM_FACTOR       (500U)      
#define NDP_MAX_RANDOM_FACTOR       (1500U)     

#define NDP_HOP_LIMIT               (255U)

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t code;           
    network_uint16_t csum;  
    network_uint32_t resv;  
} ndp_rtr_sol_t;

typedef struct __attribute__((packed)) {
    uint8_t type;                       
    uint8_t code;                       
    network_uint16_t csum;              
    uint8_t cur_hl;                     
    uint8_t flags;                      
    network_uint16_t ltime;             
    network_uint32_t reach_time;        
    network_uint32_t retrans_timer;     
} ndp_rtr_adv_t;

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t code;           
    network_uint16_t csum;  
    network_uint32_t resv;  
    ipv6_addr_t tgt;        
} ndp_nbr_sol_t;

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t code;           
    network_uint16_t csum;  
    uint8_t flags;          
    uint8_t resv[3];        
    ipv6_addr_t tgt;        
} ndp_nbr_adv_t;

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t code;           
    network_uint16_t csum;  
    network_uint32_t resv;  
    ipv6_addr_t tgt;        
    ipv6_addr_t dst;        
} ndp_redirect_t;

typedef struct __attribute__((packed)) {
    uint8_t type;   
    uint8_t len;    
} ndp_opt_t;
 
/* XXX: slla and tlla are just ndp_opt_t with variable link layer address
 * appended */

typedef struct __attribute__((packed)) {
    uint8_t type;                   
    uint8_t len;                    
    uint8_t prefix_len;             
    uint8_t flags;                  
    network_uint32_t valid_ltime;   
    network_uint32_t pref_ltime;    
    network_uint32_t resv;          
    ipv6_addr_t prefix;             
} ndp_opt_pi_t;

typedef struct __attribute__((packed)) {
    uint8_t type;                   
    uint8_t len;                    
    uint8_t prefix_len;             
    uint8_t flags;                  
    network_uint32_t route_ltime;   
    ipv6_addr_t prefix;             
} ndp_opt_ri_t;

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t len;            
    uint8_t resv[6];        
} ndp_opt_rh_t;

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t len;            
    network_uint16_t resv;  
    network_uint32_t mtu;   
} ndp_opt_mtu_t;

typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t len;            
    network_uint16_t resv;  
    network_uint32_t ltime; 
} ndp_opt_rdnss_t;
 
#ifndef __cplusplus
typedef struct __attribute__((packed)) {
    uint8_t type;           
    uint8_t len;            
    network_uint16_t resv;  
    network_uint32_t ltime; 
    ipv6_addr_t addrs[];    
} ndp_opt_rdnss_impl_t;
#endif
 
#ifdef __cplusplus
}
#endif