/*
 * Copyright 2002-2025, Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef _NETINET_IN_H_
#define _NETINET_IN_H_


#include <net/if.h>
#include <endian.h>
#include <stdint.h>
#include <sys/types.h>

#include <netinet6/in6.h>


#ifdef __cplusplus
extern "C" {
#endif


typedef uint16_t in_port_t;
typedef uint32_t in_addr_t;


#if __GNUC__ >= 4
#       define __net_swap_int32(arg)    (uint32_t)__builtin_bswap32(arg)
#       define __net_swap_int16(arg)    (uint16_t)__builtin_bswap16(arg)
#else
        extern unsigned long __swap_int32(unsigned long); /* private */
        extern uint16_t __swap_int16(uint16_t); /* private */
#       define __net_swap_int32(arg)    __swap_int32(arg)
#       define __net_swap_int16(arg)    __swap_int16(arg)
#endif

#ifndef htonl
#       if BYTE_ORDER == LITTLE_ENDIAN
#               define htonl(x) ((uint32_t)__net_swap_int32(x))
#               define ntohl(x) ((uint32_t)__net_swap_int32(x))
#               define htons(x) __net_swap_int16(x)
#               define ntohs(x) __net_swap_int16(x)
#       elif BYTE_ORDER == BIG_ENDIAN
#               define htonl(x) (x)
#               define ntohl(x) (x)
#               define htons(x) (x)
#               define ntohs(x) (x)
#       else
#               error Unknown byte order.
#       endif
#endif


/* Protocol definitions */
#define IPPROTO_IP                              0       /* 0, IPv4 */
#define IPPROTO_HOPOPTS                 0       /* 0, IPv6 hop-by-hop options */
#define IPPROTO_ICMP                    1       /* 1, ICMP (v4) */
#define IPPROTO_IGMP                    2       /* 2, IGMP (group management) */
#define IPPROTO_TCP                             6       /* 6, tcp */
#define IPPROTO_UDP                             17      /* 17, UDP */
#define IPPROTO_IPV6                    41      /* 41, IPv6 in IPv6 */
#define IPPROTO_ROUTING                 43      /* 43, Routing */
#define IPPROTO_FRAGMENT                44      /* 44, IPv6 fragmentation header */
#define IPPROTO_ESP                             50      /* 50, Encap Sec. Payload */
#define IPPROTO_AH                              51      /* 51, Auth Header */
#define IPPROTO_ICMPV6                  58      /* 58, IPv6 ICMP */
#define IPPROTO_NONE                    59      /* 59, IPv6 no next header */
#define IPPROTO_DSTOPTS                 60      /* 60, IPv6 destination option */
#define IPPROTO_ETHERIP                 97      /* 97, Ethernet in IPv4 */
#define IPPROTO_RAW                             255     /* 255 */

#define IPPROTO_MAX                             256


/* Port numbers */

#define IPPORT_RESERVED                 1024
        /* < IPPORT_RESERVED are privileged and should be accessible only by root */


/* IP Version 4 address */
struct in_addr {
        in_addr_t s_addr;
};

/* IP Version 4 socket address */
struct sockaddr_in {
        uint8_t         sin_len;
        uint8_t         sin_family;
        uint16_t        sin_port;
        struct in_addr  sin_addr;
        int8_t          sin_zero[24];
};


/* RFC 3678 - Socket Interface Extensions for Multicast Source Filters */

struct ip_mreq {
        struct in_addr imr_multiaddr; /* IP address of group */
        struct in_addr imr_interface; /* IP address of interface */
};

struct ip_mreq_source {
        struct in_addr imr_multiaddr;   /* IP address of group */
        struct in_addr imr_sourceaddr;  /* IP address of source */
        struct in_addr imr_interface;   /* IP address of interface */
};

struct group_req {
        uint32_t                gr_interface; /* interface index */
        struct sockaddr_storage gr_group;     /* group address */
};

struct group_source_req {
        uint32_t                gsr_interface; /* interface index */
        struct sockaddr_storage gsr_group;     /* group address */
        struct sockaddr_storage gsr_source;    /* source address */
};


/* [gs]etsockopt options for IPv4/IPv6 */

#define IP_OPTIONS                                      1       /* buf/ip_opts; set/get IP options */
#define IP_HDRINCL                                      2       /* int; header is included with data */
#define IP_TOS                                          3       /* int; IP type of service and preced. */
#define IP_TTL                                          4       /* int; IP time to live */

#define IP_RECVOPTS                                     5       /* bool; receive all IP opts w/dgram */
#define IP_RECVRETOPTS                          6       /* bool; receive IP opts for response */
#define IP_RECVDSTADDR                          7       /* bool; receive IP dst addr w/dgram */
#define IP_RETOPTS                                      8       /* ip_opts; set/get IP options */
#define IP_MULTICAST_IF                         9       /* in_addr; set/get IP multicast i/f  */
#define IP_MULTICAST_TTL                        10      /* u_char; set/get IP multicast ttl */
#define IP_MULTICAST_LOOP                       11      /* u_char; set/get IP multicast loopback */

/* RFC 3678 - Socket Interface Extensions for Multicast Source Filters */
#define IP_ADD_MEMBERSHIP                       12      /* ip_mreq; add an IP group membership */
#define IP_DROP_MEMBERSHIP                      13      /* ip_mreq; drop an IP group membership */
#define IP_BLOCK_SOURCE                         14      /* ip_mreq_source */
#define IP_UNBLOCK_SOURCE                       15      /* ip_mreq_source */
#define IP_ADD_SOURCE_MEMBERSHIP        16      /* ip_mreq_source */
#define IP_DROP_SOURCE_MEMBERSHIP       17      /* ip_mreq_source */
#define MCAST_JOIN_GROUP                        18      /* group_req */
#define MCAST_BLOCK_SOURCE                      19      /* group_source_req */
#define MCAST_UNBLOCK_SOURCE            20      /* group_source_req */
#define MCAST_LEAVE_GROUP                       21      /* group_req */
#define MCAST_JOIN_SOURCE_GROUP         22      /* group_source_req */
#define MCAST_LEAVE_SOURCE_GROUP        23      /* group_source_req */

/* RFC 3493 - Basic Socket Interface Extensions for IPv6 */
#define IPV6_MULTICAST_IF                       24      /* int */
#define IPV6_MULTICAST_HOPS                     25      /* int */
#define IPV6_MULTICAST_LOOP                     26      /* int */
#define IPV6_UNICAST_HOPS                       27      /* int */
#define IPV6_JOIN_GROUP                         28      /* struct ipv6_mreq */
#define IPV6_LEAVE_GROUP                        29      /* struct ipv6_mreq */
#define IPV6_V6ONLY                                     30      /* int */

/* RFC 3542 - Advanced Sockets API for IPv6 */
#define IPV6_PKTINFO                            31      /* struct ipv6_pktinfo */
#define IPV6_RECVPKTINFO                        32      /* struct ipv6_pktinfo */
#define IPV6_HOPLIMIT                           33      /* int */
#define IPV6_RECVHOPLIMIT                       34      /* int */
#define IPV6_HOPOPTS                            35  /* struct ip6_hbh */
#define IPV6_DSTOPTS                            36  /* struct ip6_dest */
#define IPV6_RTHDR                                      37  /* struct ip6_rthdr */

#define IP_DONTFRAG                                     38  /* bool; don't fragment */


#define INADDR_ANY                                      ((in_addr_t)0x00000000)
#define INADDR_LOOPBACK                         ((in_addr_t)0x7f000001)
#define INADDR_BROADCAST                        ((in_addr_t)0xffffffff) /* must be masked */

#define INADDR_UNSPEC_GROUP                     ((in_addr_t)0xe0000000) /* 224.0.0.0 */
#define INADDR_ALLHOSTS_GROUP           ((in_addr_t)0xe0000001) /* 224.0.0.1 */
#define INADDR_ALLROUTERS_GROUP         ((in_addr_t)0xe0000002) /* 224.0.0.2 */
#define INADDR_MAX_LOCAL_GROUP          ((in_addr_t)0xe00000ff) /* 224.0.0.255 */

#define IN_LOOPBACKNET                          127

#define INADDR_NONE                                     ((in_addr_t)0xffffffff)

#define IN_CLASSA(i)                            (((in_addr_t)(i) & 0x80000000) == 0)
#define IN_CLASSA_NET                           0xff000000
#define IN_CLASSA_NSHIFT                        24
#define IN_CLASSA_HOST                          0x00ffffff
#define IN_CLASSA_MAX                           128

#define IN_CLASSB(i)                            (((in_addr_t)(i) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET                           0xffff0000
#define IN_CLASSB_NSHIFT                        16
#define IN_CLASSB_HOST                          0x0000ffff
#define IN_CLASSB_MAX                           65536

#define IN_CLASSC(i)                            (((in_addr_t)(i) & 0xe0000000) == 0xc0000000)
#define IN_CLASSC_NET                           0xffffff00
#define IN_CLASSC_NSHIFT                        8
#define IN_CLASSC_HOST                          0x000000ff

#define IN_CLASSD(i)                            (((in_addr_t)(i) & 0xf0000000) == 0xe0000000)
/* These ones aren't really net and host fields, but routing needn't know. */
#define IN_CLASSD_NET                           0xf0000000
#define IN_CLASSD_NSHIFT                        28
#define IN_CLASSD_HOST                          0x0fffffff

#define IN_MULTICAST(i)                         IN_CLASSD(i)

#define IN_EXPERIMENTAL(i)                      (((in_addr_t)(i) & 0xf0000000) == 0xf0000000)
#define IN_BADCLASS(i)                          (((in_addr_t)(i) & 0xf0000000) == 0xf0000000)

#define IP_MAX_MEMBERSHIPS                      20

/* maximal length of the string representation of an IPv4 address */
#define INET_ADDRSTRLEN                         16


#ifdef __cplusplus
}
#endif

#endif  /* _NETINET_IN_H_ */