marvell/lte-telephony/apps/modem/include/ppp_ipv6_linux.h - T108 - Gitiles

 /*
  * ppp_platform.h -- platform specific header file
  *
  * (C) Copyright [2006-2008] Marvell International Ltd.
  * All Rights Reserved
  *
  */

 #ifndef __PPP_IPV6_LINUX_H__
 #define __PPP_IPV6_LINUX_H__

 #if defined __cplusplus  /* __cplusplus */
 extern "C" {
 #endif

 #include <stdio.h>
 #include <pthread.h>
 #include <semaphore.h>
 #include <stdint.h>
 #include <signal.h>
 #include <time.h>
 #include "pxa_dbg.h"
 #include <linux/ip.h>
 //#include <linux/ipv6.h>

 #define IP6_HLEN 40
 #define IP6_NEXTH_HOPBYHOP  0
 #define IP6_NEXTH_TCP       6
 #define IP6_NEXTH_UDP       17
 #define IP6_NEXTH_ENCAPS    41
 #define IP6_NEXTH_ROUTING   43
 #define IP6_NEXTH_FRAGMENT  44
 #define IP6_NEXTH_ESP       50
 #define IP6_NEXTH_AH        51
 #define IP6_NEXTH_ICMP6     58
 #define IP6_NEXTH_NONE      59
 #define IP6_NEXTH_DESTOPTS  60
 #define IP6_NEXTH_UDPLITE   136

 #define IP6_FRAG_INFO_BACKUP_LEN        20

 typedef  uint8_t u8_t;
 typedef  int8_t s8_t;
 typedef  uint16_t u16_t;
 typedef  int16_t s16_t;
 typedef  uint32_t u32_t;
 typedef  int32_t s32_t;

 struct ip6_addr {
   u32_t addr[4];
 };
 typedef struct ip6_addr ip6_addr_t;
 typedef struct ip6_addr ip6_addr_p_t;


 /* The IPv6 header. */
 struct ip6_hdr {
     /* version / traffic class / flow label */
     u32_t _v_tc_fl;
     /* payload length */
     u16_t _plen;
     /* next header */
     u8_t _nexth;
     /* hop limit */
     u8_t _hoplim;
     /* source and destination IP addresses */
     ip6_addr_p_t src;
     ip6_addr_p_t dest;
 }__attribute__((packed));

 #define IP6H_V(hdr)  ((ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f)
 #define IP6H_TC(hdr) ((ntohl((hdr)->_v_tc_fl) >> 20) & 0xff)
 #define IP6H_FL(hdr) (ntohl((hdr)->_v_tc_fl) & 0x000fffff)
 #define IP6H_PLEN(hdr) (ntohs((hdr)->_plen))
 #define IP6H_NEXTH(hdr) ((hdr)->_nexth)
 #define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6)
 #define IP6H_HOPLIM(hdr) ((hdr)->_hoplim)

 #define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (htonl(((v) << 28) | ((tc) << 20) | (fl)))
 #define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = htons(plen)
 #define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth)
 #define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl)

 #define NETIF_MAX_HWADDR_LEN 6
 #define RA_MSG_LEN  256
 #define DHCPV6_MSG_LEN  1024

 enum icmp6_type {
   ICMP6_TYPE_DUR = 1,  /* Destination unreachable */
   ICMP6_TYPE_PTB = 2,  /* Packet too big */
   ICMP6_TYPE_TE = 3,   /* Time exceeded */
   ICMP6_TYPE_PP = 4,   /* Parameter problem */
   ICMP6_TYPE_PE1 = 100,  /* Private experimentation */
   ICMP6_TYPE_PE2 = 101,  /* Private experimentation */
   ICMP6_TYPE_RSV_ERR = 127,  /* Reserved for expansion of error messages */

   ICMP6_TYPE_EREQ = 128,  /* Echo request */
   ICMP6_TYPE_EREP = 129,  /* Echo reply */
   ICMP6_TYPE_MLQ = 130,  /* Multicast listener query */
   ICMP6_TYPE_MLR = 131,  /* Multicast listener report */
   ICMP6_TYPE_MLD = 132,  /* Multicast listener done */
   ICMP6_TYPE_RS = 133,  /* Router solicitation */
   ICMP6_TYPE_RA = 134,  /* Router advertisement */
   ICMP6_TYPE_NS = 135,  /* Neighbor solicitation */
   ICMP6_TYPE_NA = 136,  /* Neighbor advertisement */
   ICMP6_TYPE_RD = 137,  /* Redirect */
   ICMP6_TYPE_MRA = 151,  /* Multicast router advertisement */
   ICMP6_TYPE_MRS = 152,  /* Multicast router solicitation */
   ICMP6_TYPE_MRT = 153,  /* Multicast router termination */
   ICMP6_TYPE_PE3 = 200,  /* Private experimentation */
   ICMP6_TYPE_PE4 = 201,  /* Private experimentation */
   ICMP6_TYPE_RSV_INF = 255  /* Reserved for expansion of informational messages */
 };

 /** Access address in 16-bit block */
 #define IP6_ADDR_BLOCK1(ip6addr) ((u16_t)(htonl((ip6addr)->addr[0]) >> 16) & 0xffff)
 #define IP6_ADDR_BLOCK2(ip6addr) ((u16_t)(htonl((ip6addr)->addr[0])) & 0xffff)
 #define IP6_ADDR_BLOCK3(ip6addr) ((u16_t)(htonl((ip6addr)->addr[1]) >> 16) & 0xffff)
 #define IP6_ADDR_BLOCK4(ip6addr) ((u16_t)(htonl((ip6addr)->addr[1])) & 0xffff)
 #define IP6_ADDR_BLOCK5(ip6addr) ((u16_t)(htonl((ip6addr)->addr[2]) >> 16) & 0xffff)
 #define IP6_ADDR_BLOCK6(ip6addr) ((u16_t)(htonl((ip6addr)->addr[2])) & 0xffff)
 #define IP6_ADDR_BLOCK7(ip6addr) ((u16_t)(htonl((ip6addr)->addr[3]) >> 16) & 0xffff)
 #define IP6_ADDR_BLOCK8(ip6addr) ((u16_t)(htonl((ip6addr)->addr[3])) & 0xffff)

 #define ip6_addr_debug_print(fmt, ipaddr) \
   ERRMSG(fmt" %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", \
                       IP6_ADDR_BLOCK1(ipaddr) ,    \
                       IP6_ADDR_BLOCK2(ipaddr) ,    \
                       IP6_ADDR_BLOCK3(ipaddr),    \
                       IP6_ADDR_BLOCK4(ipaddr),    \
                       IP6_ADDR_BLOCK5(ipaddr),    \
                       IP6_ADDR_BLOCK6(ipaddr),    \
                       IP6_ADDR_BLOCK7(ipaddr),    \
                       IP6_ADDR_BLOCK8(ipaddr))

 #define ip6_addr_copy(dest, src) do{(dest).addr[0] = (src).in6_u.u6_addr32[0]; \
                                     (dest).addr[1] = (src).in6_u.u6_addr32[1]; \
                                     (dest).addr[2] = (src).in6_u.u6_addr32[2]; \
                                     (dest).addr[3] = (src).in6_u.u6_addr32[3];}while(0)

 #define PP_HTONS(x) ((((x) & 0xff) << 8) | (((x) & 0xff00) >> 8))
 #define PP_NTOHS(x) PP_HTONS(x)
 #define PP_HTONL(x) ((((x) & 0xff) << 24) | \
                      (((x) & 0xff00) << 8) | \
                      (((x) & 0xff0000UL) >> 8) | \
                      (((x) & 0xff000000UL) >> 24))
 #define PP_NTOHL(x) PP_HTONL(x)

 #define ip6_addr_ismulticast(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL))
 #define ip6_addr_ismulticast_iflocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xff010000UL))
 #define ip6_addr_ismulticast_linklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xff020000UL))
 #define ip6_addr_islinklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfe800000UL))
 #define ip6_addr_issitelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfec00000UL))
 #define ip6_addr_isany(ip6addr) (((ip6addr) == NULL) || \
     ((ip6addr)->addr[0] == 0UL) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] == 0UL) && \
     ((ip6addr)->addr[3] == 0UL))

 #define ip6_addr_isloopback(ip6addr) (((ip6addr)->addr[0] == 0UL) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] == 0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

 #define ip6_addr_isglobal(ip6addr) (!ip6_addr_isany(ip6addr) && \
 								!ip6_addr_islinklocal(ip6addr) && \
 								!ip6_addr_issitelocal(ip6addr) && \
 								!ip6_addr_isloopback(ip6addr) && \
 								!ip6_addr_ismulticast(ip6addr))

 #define ip6_addr_is_dns_server(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xfec00000UL)) && \
     ((ip6addr)->addr[1] == PP_HTONL(0x0000ffffUL)) && \
     ((ip6addr)->addr[2] == 0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

 #define ip6_addr_isallnodes_iflocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff010000UL)) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] == 0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

 #define ip6_addr_isallnodes_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] == 0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

 #define ip6_addr_set_allnodes_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
                 (ip6addr)->addr[1] = 0; \
                 (ip6addr)->addr[2] = 0; \
                 (ip6addr)->addr[3] = PP_HTONL(0x00000001UL);}while(0)

 #define ip6_addr_isallrouters_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] == 0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00000002UL)))

 #define ip6_addr_set_allrouters_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
                 (ip6addr)->addr[1] = 0; \
                 (ip6addr)->addr[2] = 0; \
                 (ip6addr)->addr[3] = PP_HTONL(0x00000002UL);}while(0)

 /* FF02::1:2 */
 #define ip6_addr_is_dhcp_agentserver(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] ==  0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00010002UL)))

 /* FF05::1:3 */
 #define ip6_addr_is_dhcp_allserver(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff050000UL)) && \
     ((ip6addr)->addr[1] == 0UL) && \
     ((ip6addr)->addr[2] ==  0UL) && \
     ((ip6addr)->addr[3] == PP_HTONL(0x00010003UL)))

 #define ip6_addr_is_same(src,dst) (((src)->addr[0] == (dst)->addr[0]) && \
     ((src)->addr[1] == (dst)->addr[1]) && \
     ((src)->addr[2] == (dst)->addr[2]) && \
     ((src)->addr[3] == (dst)->addr[3]))


 #define ip6_interface_addr_is_same(src,dst) (((src)->addr[2] == (dst)->addr[2]) && \
     ((src)->addr[3] == (dst)->addr[3] + 1))

 /** Safely copy one IPv6 address to another (src may be NULL) */
 #define ip6_addr_set(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : (src)->addr[0]; \
                                    (dest)->addr[1] = (src) == NULL ? 0 : (src)->addr[1]; \
                                    (dest)->addr[2] = (src) == NULL ? 0 : (src)->addr[2]; \
                                    (dest)->addr[3] = (src) == NULL ? 0 : (src)->addr[3];}while(0)

 /** Safely copy one IPv6 address to another (src may be NULL) */
 #define ip6_addr_set_turn(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : PP_HTONL((src)->addr[0]); \
                                    (dest)->addr[1] = (src) == NULL ? 0 : PP_HTONL((src)->addr[1]); \
                                    (dest)->addr[2] = (src) == NULL ? 0 : PP_HTONL((src)->addr[2]); \
                                    (dest)->addr[3] = (src) == NULL ? 0 : PP_HTONL((src)->addr[3]);}while(0)

 /** Set complete address to zero */
 #define ip6_addr_set_zero(ip6addr)    do{(ip6addr)->addr[0] = 0; \
                                          (ip6addr)->addr[1] = 0; \
                                          (ip6addr)->addr[2] = 0; \
                                          (ip6addr)->addr[3] = 0;}while(0)

 /** Split an u32_t in two u16_ts and add them up */
 #ifndef FOLD_U32T
 #define FOLD_U32T(u)          (((u) >> 16) + ((u) & 0x0000ffffUL))
 #endif

 typedef u32_t  mem_ptr_t;

 /* ND definations */
 /** Neighbor solicitation message header. */
 struct ns_header {
 	u8_t type;
 	u8_t code;
 	u16_t chksum;
 	u32_t reserved;
 	ip6_addr_p_t target_address;
 	/* Options follow. */
 } __attribute__((packed));

 /** Neighbor advertisement message header. */
 struct na_header {
 	u8_t type;
 	u8_t code;
 	u16_t chksum;
 	u8_t flags;
 	u8_t reserved[3];
 	ip6_addr_p_t target_address;
 	/* Options follow. */
 }__attribute__((packed));

 #define ND6_FLAG_ROUTER      (0x80)
 #define ND6_FLAG_SOLICITED   (0x40)
 #define ND6_FLAG_OVERRIDE    (0x20)

 /** Router solicitation message header. */
 struct rs_header {
 	u8_t type;
 	u8_t code;
 	u16_t chksum;
 	u32_t reserved;
 	/* Options follow. */
 }__attribute__((packed));

 /** Router advertisement message header. */
 #define ND6_RA_FLAG_MANAGED_ADDR_CONFIG (0x80)
 #define ND6_RA_FLAG_OTHER_STATEFUL_CONFIG (0x40)
 #define ND6_RA_FLAG_HOME_AGENT (0x20)
 #define ND6_RA_PREFERENCE_MASK (0x18)
 #define ND6_RA_PREFERENCE_HIGH (0x08)
 #define ND6_RA_PREFERENCE_MEDIUM (0x00)
 #define ND6_RA_PREFERENCE_LOW (0x18)
 #define ND6_RA_PREFERENCE_DISABLED (0x10)

 struct ra_header {
 	u8_t type;
 	u8_t code;
 	u16_t chksum;
 	u8_t current_hop_limit;
 	u8_t flags;
 	u16_t router_lifetime;
 	u32_t reachable_time;
 	u32_t retrans_timer;
 	/* Options follow. */
 }__attribute__((packed));

 /** Redirect message header. */
 struct redirect_header {
 	u8_t type;
 	u8_t code;
 	u16_t chksum;
 	u32_t reserved;
 	ip6_addr_p_t target_address;
 	ip6_addr_p_t destination_address;
 	/* Options follow. */
 }__attribute__((packed));

 /** Link-layer address option. */
 #define ND6_OPTION_TYPE_SOURCE_LLADDR (0x01)
 #define ND6_OPTION_TYPE_TARGET_LLADDR (0x02)

 struct lladdr_option {
 	u8_t type;
 	u8_t length;
 	u8_t addr[NETIF_MAX_HWADDR_LEN];
 } __attribute__((packed));

 /** Prefix information option. */
 #define ND6_OPTION_TYPE_PREFIX_INFO (0x03)
 #define ND6_PREFIX_FLAG_ON_LINK (0x80)
 #define ND6_PREFIX_FLAG_AUTONOMOUS (0x40)
 #define ND6_PREFIX_FLAG_ROUTER_ADDRESS (0x20)
 #define ND6_PREFIX_FLAG_SITE_PREFIX (0x10)

 struct prefix_option {
 	u8_t type;
 	u8_t length;
 	u8_t prefix_length;
 	u8_t flags;
 	u32_t valid_lifetime;
 	u32_t preferred_lifetime;
 	u8_t reserved2[3];
 	u8_t site_prefix_length;
 	ip6_addr_p_t prefix;
 }__attribute__((packed));


 #define ND6_OPTION_TYPE_DNS (0x19)
 struct dns_svr_option { //rfc 4339 & rfc 61016
 	u8_t type;
 	u8_t length;
 	u16_t reserved;
 	u32_t lifetime;
 	u32_t dns1[4];
 	u32_t dns2[4];
 } __attribute__((packed));

 /** Redirected header option. */
 #define ND6_OPTION_TYPE_REDIR_HDR (0x04)

 struct redirected_header_option {
 	u8_t type;
 	u8_t length;
 	u8_t reserved[6];
 	/* Portion of redirected packet follows. */
 	/* PACK_STRUCT_FIELD(u8_t redirected[8]); */
 }  __attribute__((packed));

 /** MTU option. */
 #define ND6_OPTION_TYPE_MTU (0x05)
 struct mtu_option {
 	u8_t type;
 	u8_t length;
 	u16_t reserved;
 	u32_t mtu;
 }__attribute__((packed));

 /** Route information option. */
 #define ND6_OPTION_TYPE_ROUTE_INFO (24)
 struct route_option {
 	u8_t type;
 	u8_t length;
 	u8_t prefix_length;
 	u8_t preference;
 	u32_t route_lifetime;
 	ip6_addr_p_t prefix;
 } __attribute__((packed));

 #define DHCP6_CLIENT_LEN    64
 #define DHCP6_CLIENT_PORT   546
 #define DHCP6_SERVER_PORT   547

 #define DHCPV6_SOLICIT          1
 #define DHCPV6_ADVERTISE        2
 #define DHCPV6_REQUEST          3
 #define DHCPV6_CONFIRM          4
 #define DHCPV6_RENEW            5
 #define DHCPV6_REBIND           6
 #define DHCPV6_REPLY            7
 #define DHCPV6_INFO_REQUEST     11

 typedef struct _dhcpv6_packet
 {
     u8_t    type;
     u8_t    xxid[3];
     u32_t   opts[1];
 }__attribute__((packed)) dhcpv6_packet;

 typedef struct _dhcpv6_opts
 {
     u16_t   type;
     u16_t   size;
 }__attribute__((packed)) dhcpv6_opts;

 typedef struct _dhcpv6_opt_xid
 {
     u16_t   type;   // 1 for cid, 2 for sid
     u16_t   size;   // 14
     u16_t   duid;   // 1
     u16_t   hdwr;   // 1 for Ethernet,  6 for IEEE 802, network order
     u32_t   time;   // time stamp, network order
     u8_t    mac[6]; // mac address
 }__attribute__((packed)) dhcpv6_opt_xid;

 typedef struct _dhcpv6_opt_dns_svr
 {
     u16_t   type;       // 23
     u16_t   size;       // 32
     u32_t   dns1[4];    // dns server 1
     u32_t   dns2[4];    // dns server 2
 }__attribute__((packed)) dhcpv6_opt_dns_svr;

 typedef struct _dhcpv6_packet_svr
 {
     u8_t                ip_hdr[IP6_HLEN];
     u8_t                udp_hdr[8]; // reserved buffer for UDP header
     u8_t                type;
     u8_t                xxid[3];
     u8_t                opts[512];
 }__attribute__((packed)) dhcpv6_packet_svr;

 struct icmp6_hdr {
     u8_t type;
     u8_t code;
     u16_t chksum;
     u32_t data;
 }__attribute__((packed));

 struct udp_hdr {
     u16_t src;
     u16_t dest;  /* src/dest UDP ports */
     u16_t len;
     u16_t chksum;
 }__attribute__((packed));

 enum PPP_ND_STATE {
     ND_STATE_INIT,
     ND_STATE_RS_SEND,
     ND_STATE_RA_RECV,
     ND_STATE_RA_SEND,
     ND_STATE_DHCP_SEND,
     ND_STATE_DATA_READY
 };

 void raValidPeriodTimerHandler(int sig  UNUSED, siginfo_t *si  UNUSED, void *uc  UNUSED);

 #if defined __cplusplus
 }
 #endif /* __cplusplus */

 #endif
	/*
	* ppp_platform.h -- platform specific header file
	*
	* (C) Copyright [2006-2008] Marvell International Ltd.
	* All Rights Reserved
	*
	*/

	#ifndef __PPP_IPV6_LINUX_H__
	#define __PPP_IPV6_LINUX_H__

	#if defined __cplusplus /* __cplusplus */
	extern "C" {
	#endif

	#include <stdio.h>
	#include <pthread.h>
	#include <semaphore.h>
	#include <stdint.h>
	#include <signal.h>
	#include <time.h>
	#include "pxa_dbg.h"
	#include <linux/ip.h>
	//#include <linux/ipv6.h>

	#define IP6_HLEN 40
	#define IP6_NEXTH_HOPBYHOP 0
	#define IP6_NEXTH_TCP 6
	#define IP6_NEXTH_UDP 17
	#define IP6_NEXTH_ENCAPS 41
	#define IP6_NEXTH_ROUTING 43
	#define IP6_NEXTH_FRAGMENT 44
	#define IP6_NEXTH_ESP 50
	#define IP6_NEXTH_AH 51
	#define IP6_NEXTH_ICMP6 58
	#define IP6_NEXTH_NONE 59
	#define IP6_NEXTH_DESTOPTS 60
	#define IP6_NEXTH_UDPLITE 136

	#define IP6_FRAG_INFO_BACKUP_LEN 20

	typedef uint8_t u8_t;
	typedef int8_t s8_t;
	typedef uint16_t u16_t;
	typedef int16_t s16_t;
	typedef uint32_t u32_t;
	typedef int32_t s32_t;

	struct ip6_addr {
	u32_t addr[4];
	};
	typedef struct ip6_addr ip6_addr_t;
	typedef struct ip6_addr ip6_addr_p_t;


	/* The IPv6 header. */
	struct ip6_hdr {
	/* version / traffic class / flow label */
	u32_t _v_tc_fl;
	/* payload length */
	u16_t _plen;
	/* next header */
	u8_t _nexth;
	/* hop limit */
	u8_t _hoplim;
	/* source and destination IP addresses */
	ip6_addr_p_t src;
	ip6_addr_p_t dest;
	}__attribute__((packed));

	#define IP6H_V(hdr) ((ntohl((hdr)->_v_tc_fl) >> 28) & 0x0f)
	#define IP6H_TC(hdr) ((ntohl((hdr)->_v_tc_fl) >> 20) & 0xff)
	#define IP6H_FL(hdr) (ntohl((hdr)->_v_tc_fl) & 0x000fffff)
	#define IP6H_PLEN(hdr) (ntohs((hdr)->_plen))
	#define IP6H_NEXTH(hdr) ((hdr)->_nexth)
	#define IP6H_NEXTH_P(hdr) ((u8_t *)(hdr) + 6)
	#define IP6H_HOPLIM(hdr) ((hdr)->_hoplim)

	#define IP6H_VTCFL_SET(hdr, v, tc, fl) (hdr)->_v_tc_fl = (htonl(((v) << 28) \| ((tc) << 20) \| (fl)))
	#define IP6H_PLEN_SET(hdr, plen) (hdr)->_plen = htons(plen)
	#define IP6H_NEXTH_SET(hdr, nexth) (hdr)->_nexth = (nexth)
	#define IP6H_HOPLIM_SET(hdr, hl) (hdr)->_hoplim = (u8_t)(hl)

	#define NETIF_MAX_HWADDR_LEN 6
	#define RA_MSG_LEN 256
	#define DHCPV6_MSG_LEN 1024

	enum icmp6_type {
	ICMP6_TYPE_DUR = 1, /* Destination unreachable */
	ICMP6_TYPE_PTB = 2, /* Packet too big */
	ICMP6_TYPE_TE = 3, /* Time exceeded */
	ICMP6_TYPE_PP = 4, /* Parameter problem */
	ICMP6_TYPE_PE1 = 100, /* Private experimentation */
	ICMP6_TYPE_PE2 = 101, /* Private experimentation */
	ICMP6_TYPE_RSV_ERR = 127, /* Reserved for expansion of error messages */

	ICMP6_TYPE_EREQ = 128, /* Echo request */
	ICMP6_TYPE_EREP = 129, /* Echo reply */
	ICMP6_TYPE_MLQ = 130, /* Multicast listener query */
	ICMP6_TYPE_MLR = 131, /* Multicast listener report */
	ICMP6_TYPE_MLD = 132, /* Multicast listener done */
	ICMP6_TYPE_RS = 133, /* Router solicitation */
	ICMP6_TYPE_RA = 134, /* Router advertisement */
	ICMP6_TYPE_NS = 135, /* Neighbor solicitation */
	ICMP6_TYPE_NA = 136, /* Neighbor advertisement */
	ICMP6_TYPE_RD = 137, /* Redirect */
	ICMP6_TYPE_MRA = 151, /* Multicast router advertisement */
	ICMP6_TYPE_MRS = 152, /* Multicast router solicitation */
	ICMP6_TYPE_MRT = 153, /* Multicast router termination */
	ICMP6_TYPE_PE3 = 200, /* Private experimentation */
	ICMP6_TYPE_PE4 = 201, /* Private experimentation */
	ICMP6_TYPE_RSV_INF = 255 /* Reserved for expansion of informational messages */
	};

	/** Access address in 16-bit block */
	#define IP6_ADDR_BLOCK1(ip6addr) ((u16_t)(htonl((ip6addr)->addr[0]) >> 16) & 0xffff)
	#define IP6_ADDR_BLOCK2(ip6addr) ((u16_t)(htonl((ip6addr)->addr[0])) & 0xffff)
	#define IP6_ADDR_BLOCK3(ip6addr) ((u16_t)(htonl((ip6addr)->addr[1]) >> 16) & 0xffff)
	#define IP6_ADDR_BLOCK4(ip6addr) ((u16_t)(htonl((ip6addr)->addr[1])) & 0xffff)
	#define IP6_ADDR_BLOCK5(ip6addr) ((u16_t)(htonl((ip6addr)->addr[2]) >> 16) & 0xffff)
	#define IP6_ADDR_BLOCK6(ip6addr) ((u16_t)(htonl((ip6addr)->addr[2])) & 0xffff)
	#define IP6_ADDR_BLOCK7(ip6addr) ((u16_t)(htonl((ip6addr)->addr[3]) >> 16) & 0xffff)
	#define IP6_ADDR_BLOCK8(ip6addr) ((u16_t)(htonl((ip6addr)->addr[3])) & 0xffff)

	#define ip6_addr_debug_print(fmt, ipaddr) \
	ERRMSG(fmt" %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", \
	IP6_ADDR_BLOCK1(ipaddr) , \
	IP6_ADDR_BLOCK2(ipaddr) , \
	IP6_ADDR_BLOCK3(ipaddr), \
	IP6_ADDR_BLOCK4(ipaddr), \
	IP6_ADDR_BLOCK5(ipaddr), \
	IP6_ADDR_BLOCK6(ipaddr), \
	IP6_ADDR_BLOCK7(ipaddr), \
	IP6_ADDR_BLOCK8(ipaddr))

	#define ip6_addr_copy(dest, src) do{(dest).addr[0] = (src).in6_u.u6_addr32[0]; \
	(dest).addr[1] = (src).in6_u.u6_addr32[1]; \
	(dest).addr[2] = (src).in6_u.u6_addr32[2]; \
	(dest).addr[3] = (src).in6_u.u6_addr32[3];}while(0)

	#define PP_HTONS(x) ((((x) & 0xff) << 8) \| (((x) & 0xff00) >> 8))
	#define PP_NTOHS(x) PP_HTONS(x)
	#define PP_HTONL(x) ((((x) & 0xff) << 24) \| \
	(((x) & 0xff00) << 8) \| \
	(((x) & 0xff0000UL) >> 8) \| \
	(((x) & 0xff000000UL) >> 24))
	#define PP_NTOHL(x) PP_HTONL(x)

	#define ip6_addr_ismulticast(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xff000000UL)) == PP_HTONL(0xff000000UL))
	#define ip6_addr_ismulticast_iflocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xff010000UL))
	#define ip6_addr_ismulticast_linklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xff020000UL))
	#define ip6_addr_islinklocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfe800000UL))
	#define ip6_addr_issitelocal(ip6addr) (((ip6addr)->addr[0] & PP_HTONL(0xffc00000UL)) == PP_HTONL(0xfec00000UL))
	#define ip6_addr_isany(ip6addr) (((ip6addr) == NULL) \|\| \
	((ip6addr)->addr[0] == 0UL) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == 0UL))

	#define ip6_addr_isloopback(ip6addr) (((ip6addr)->addr[0] == 0UL) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

	#define ip6_addr_isglobal(ip6addr) (!ip6_addr_isany(ip6addr) && \
	!ip6_addr_islinklocal(ip6addr) && \
	!ip6_addr_issitelocal(ip6addr) && \
	!ip6_addr_isloopback(ip6addr) && \
	!ip6_addr_ismulticast(ip6addr))

	#define ip6_addr_is_dns_server(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xfec00000UL)) && \
	((ip6addr)->addr[1] == PP_HTONL(0x0000ffffUL)) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

	#define ip6_addr_isallnodes_iflocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff010000UL)) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

	#define ip6_addr_isallnodes_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00000001UL)))

	#define ip6_addr_set_allnodes_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
	(ip6addr)->addr[1] = 0; \
	(ip6addr)->addr[2] = 0; \
	(ip6addr)->addr[3] = PP_HTONL(0x00000001UL);}while(0)

	#define ip6_addr_isallrouters_linklocal(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00000002UL)))

	#define ip6_addr_set_allrouters_linklocal(ip6addr) do{(ip6addr)->addr[0] = PP_HTONL(0xff020000UL); \
	(ip6addr)->addr[1] = 0; \
	(ip6addr)->addr[2] = 0; \
	(ip6addr)->addr[3] = PP_HTONL(0x00000002UL);}while(0)

	/* FF02::1:2 */
	#define ip6_addr_is_dhcp_agentserver(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff020000UL)) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00010002UL)))

	/* FF05::1:3 */
	#define ip6_addr_is_dhcp_allserver(ip6addr) (((ip6addr)->addr[0] == PP_HTONL(0xff050000UL)) && \
	((ip6addr)->addr[1] == 0UL) && \
	((ip6addr)->addr[2] == 0UL) && \
	((ip6addr)->addr[3] == PP_HTONL(0x00010003UL)))

	#define ip6_addr_is_same(src,dst) (((src)->addr[0] == (dst)->addr[0]) && \
	((src)->addr[1] == (dst)->addr[1]) && \
	((src)->addr[2] == (dst)->addr[2]) && \
	((src)->addr[3] == (dst)->addr[3]))


	#define ip6_interface_addr_is_same(src,dst) (((src)->addr[2] == (dst)->addr[2]) && \
	((src)->addr[3] == (dst)->addr[3] + 1))

	/** Safely copy one IPv6 address to another (src may be NULL) */
	#define ip6_addr_set(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : (src)->addr[0]; \
	(dest)->addr[1] = (src) == NULL ? 0 : (src)->addr[1]; \
	(dest)->addr[2] = (src) == NULL ? 0 : (src)->addr[2]; \
	(dest)->addr[3] = (src) == NULL ? 0 : (src)->addr[3];}while(0)

	/** Safely copy one IPv6 address to another (src may be NULL) */
	#define ip6_addr_set_turn(dest, src) do{(dest)->addr[0] = (src) == NULL ? 0 : PP_HTONL((src)->addr[0]); \
	(dest)->addr[1] = (src) == NULL ? 0 : PP_HTONL((src)->addr[1]); \
	(dest)->addr[2] = (src) == NULL ? 0 : PP_HTONL((src)->addr[2]); \
	(dest)->addr[3] = (src) == NULL ? 0 : PP_HTONL((src)->addr[3]);}while(0)

	/** Set complete address to zero */
	#define ip6_addr_set_zero(ip6addr) do{(ip6addr)->addr[0] = 0; \
	(ip6addr)->addr[1] = 0; \
	(ip6addr)->addr[2] = 0; \
	(ip6addr)->addr[3] = 0;}while(0)

	/** Split an u32_t in two u16_ts and add them up */
	#ifndef FOLD_U32T
	#define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL))
	#endif

	typedef u32_t mem_ptr_t;

	/* ND definations */
	/** Neighbor solicitation message header. */
	struct ns_header {
	u8_t type;
	u8_t code;
	u16_t chksum;
	u32_t reserved;
	ip6_addr_p_t target_address;
	/* Options follow. */
	} __attribute__((packed));

	/** Neighbor advertisement message header. */
	struct na_header {
	u8_t type;
	u8_t code;
	u16_t chksum;
	u8_t flags;
	u8_t reserved[3];
	ip6_addr_p_t target_address;
	/* Options follow. */
	}__attribute__((packed));

	#define ND6_FLAG_ROUTER (0x80)
	#define ND6_FLAG_SOLICITED (0x40)
	#define ND6_FLAG_OVERRIDE (0x20)

	/** Router solicitation message header. */
	struct rs_header {
	u8_t type;
	u8_t code;
	u16_t chksum;
	u32_t reserved;
	/* Options follow. */
	}__attribute__((packed));

	/** Router advertisement message header. */
	#define ND6_RA_FLAG_MANAGED_ADDR_CONFIG (0x80)
	#define ND6_RA_FLAG_OTHER_STATEFUL_CONFIG (0x40)
	#define ND6_RA_FLAG_HOME_AGENT (0x20)
	#define ND6_RA_PREFERENCE_MASK (0x18)
	#define ND6_RA_PREFERENCE_HIGH (0x08)
	#define ND6_RA_PREFERENCE_MEDIUM (0x00)
	#define ND6_RA_PREFERENCE_LOW (0x18)
	#define ND6_RA_PREFERENCE_DISABLED (0x10)

	struct ra_header {
	u8_t type;
	u8_t code;
	u16_t chksum;
	u8_t current_hop_limit;
	u8_t flags;
	u16_t router_lifetime;
	u32_t reachable_time;
	u32_t retrans_timer;
	/* Options follow. */
	}__attribute__((packed));

	/** Redirect message header. */
	struct redirect_header {
	u8_t type;
	u8_t code;
	u16_t chksum;
	u32_t reserved;
	ip6_addr_p_t target_address;
	ip6_addr_p_t destination_address;
	/* Options follow. */
	}__attribute__((packed));

	/** Link-layer address option. */
	#define ND6_OPTION_TYPE_SOURCE_LLADDR (0x01)
	#define ND6_OPTION_TYPE_TARGET_LLADDR (0x02)

	struct lladdr_option {
	u8_t type;
	u8_t length;
	u8_t addr[NETIF_MAX_HWADDR_LEN];
	} __attribute__((packed));

	/** Prefix information option. */
	#define ND6_OPTION_TYPE_PREFIX_INFO (0x03)
	#define ND6_PREFIX_FLAG_ON_LINK (0x80)
	#define ND6_PREFIX_FLAG_AUTONOMOUS (0x40)
	#define ND6_PREFIX_FLAG_ROUTER_ADDRESS (0x20)
	#define ND6_PREFIX_FLAG_SITE_PREFIX (0x10)

	struct prefix_option {
	u8_t type;
	u8_t length;
	u8_t prefix_length;
	u8_t flags;
	u32_t valid_lifetime;
	u32_t preferred_lifetime;
	u8_t reserved2[3];
	u8_t site_prefix_length;
	ip6_addr_p_t prefix;
	}__attribute__((packed));


	#define ND6_OPTION_TYPE_DNS (0x19)
	struct dns_svr_option { //rfc 4339 & rfc 61016
	u8_t type;
	u8_t length;
	u16_t reserved;
	u32_t lifetime;
	u32_t dns1[4];
	u32_t dns2[4];
	} __attribute__((packed));

	/** Redirected header option. */
	#define ND6_OPTION_TYPE_REDIR_HDR (0x04)

	struct redirected_header_option {
	u8_t type;
	u8_t length;
	u8_t reserved[6];
	/* Portion of redirected packet follows. */
	/* PACK_STRUCT_FIELD(u8_t redirected[8]); */
	} __attribute__((packed));

	/** MTU option. */
	#define ND6_OPTION_TYPE_MTU (0x05)
	struct mtu_option {
	u8_t type;
	u8_t length;
	u16_t reserved;
	u32_t mtu;
	}__attribute__((packed));

	/** Route information option. */
	#define ND6_OPTION_TYPE_ROUTE_INFO (24)
	struct route_option {
	u8_t type;
	u8_t length;
	u8_t prefix_length;
	u8_t preference;
	u32_t route_lifetime;
	ip6_addr_p_t prefix;
	} __attribute__((packed));

	#define DHCP6_CLIENT_LEN 64
	#define DHCP6_CLIENT_PORT 546
	#define DHCP6_SERVER_PORT 547

	#define DHCPV6_SOLICIT 1
	#define DHCPV6_ADVERTISE 2
	#define DHCPV6_REQUEST 3
	#define DHCPV6_CONFIRM 4
	#define DHCPV6_RENEW 5
	#define DHCPV6_REBIND 6
	#define DHCPV6_REPLY 7
	#define DHCPV6_INFO_REQUEST 11

	typedef struct _dhcpv6_packet
	{
	u8_t type;
	u8_t xxid[3];
	u32_t opts[1];
	}__attribute__((packed)) dhcpv6_packet;

	typedef struct _dhcpv6_opts
	{
	u16_t type;
	u16_t size;
	}__attribute__((packed)) dhcpv6_opts;

	typedef struct _dhcpv6_opt_xid
	{
	u16_t type; // 1 for cid, 2 for sid
	u16_t size; // 14
	u16_t duid; // 1
	u16_t hdwr; // 1 for Ethernet, 6 for IEEE 802, network order
	u32_t time; // time stamp, network order
	u8_t mac[6]; // mac address
	}__attribute__((packed)) dhcpv6_opt_xid;

	typedef struct _dhcpv6_opt_dns_svr
	{
	u16_t type; // 23
	u16_t size; // 32
	u32_t dns1[4]; // dns server 1
	u32_t dns2[4]; // dns server 2
	}__attribute__((packed)) dhcpv6_opt_dns_svr;

	typedef struct _dhcpv6_packet_svr
	{
	u8_t ip_hdr[IP6_HLEN];
	u8_t udp_hdr[8]; // reserved buffer for UDP header
	u8_t type;
	u8_t xxid[3];
	u8_t opts[512];
	}__attribute__((packed)) dhcpv6_packet_svr;

	struct icmp6_hdr {
	u8_t type;
	u8_t code;
	u16_t chksum;
	u32_t data;
	}__attribute__((packed));

	struct udp_hdr {
	u16_t src;
	u16_t dest; /* src/dest UDP ports */
	u16_t len;
	u16_t chksum;
	}__attribute__((packed));

	enum PPP_ND_STATE {
	ND_STATE_INIT,
	ND_STATE_RS_SEND,
	ND_STATE_RA_RECV,
	ND_STATE_RA_SEND,
	ND_STATE_DHCP_SEND,
	ND_STATE_DATA_READY
	};

	void raValidPeriodTimerHandler(int sig UNUSED, siginfo_t si UNUSED, void uc UNUSED);

	#if defined __cplusplus
	}
	#endif /* __cplusplus */

	#endif