#ifndef __SOCKET_H
#define __SOCKET_H

#include <stddef.h>
#include <errno.h>

// Socket Types
#define SOCK_STREAM 1
#define SOCK_DGRAM 2
#define SOCK_RAW 3
 
// IP protocols
#define IPPROTO_IP 0
#define IPPROTO_ICMP 1
#define IPPROTO_TCP 6
#define IPPROTO_UDP 17
#define IPPROTO_RAW 255
 
// IP options
#define IP_TTL 2
 
// Address families
#define AF_UNSPEC 0
#define AF_LOCAL 1
#define AF_INET  2 
#define AF_INET4 2     // IPv4
#define AF_INET6 10    // IPv6

#define PF_UNSPEC AF_UNSPEC
#define PF_LOCAL  AF_LOCAL
#define PF_INET4  AF_INET4
#define PF_INET6  AF_INET6
 
// internal definition
#define AI_SUPPORTED 0x40F

// for system function 76
#define API_ETH (0<<16)
#define API_IPv4 (1<<16)
#define API_ICMP (2<<16)
#define API_UDP (3<<16)
#define API_TCP (4<<16)
#define API_ARP (5<<16)
#define API_PPPOE (6<<16)

// Socket flags for user calls
#define MSG_NOFLAG 0
#define MSG_PEEK 0x02
#define MSG_DONTWAIT 0x40
 
// Socket levels
#define SOL_SOCKET 0xffff

//Socket options
#define SO_BINDTODEVICE (1<<9)
#define SO_NONBLOCK (1<<31)
#define PORT(X) (X<<8)

#pragma pack(push,1)
struct sockaddr{
    unsigned short sin_family;
    unsigned short sin_port; 
    unsigned int sin_addr;
    unsigned long long sin_zero;
}; 
#pragma pack(pop)

#pragma pack(push,1)
typedef struct{
  unsigned int level;
  unsigned int optionname;
  unsigned int optlenght;
  unsigned char options;
}optstruct;
#pragma pack(pop)

int socket(int domain, int type, int protocol);
int close(int socket);
int bind(int socket, const struct sockaddr *addres, int addres_len);
int listen(int socket, int backlog);
int connect(int socket, const struct sockaddr* address, int socket_len);
int accept(int socket, const struct sockaddr* address, int address_len);
int send(int socket, const void *message, size_t msg_len, int flag);
int recv(int socket, void *buffer, size_t buff_len, int flag);
int setsockopt(int socket,const optstruct* opt);
int getsockopt(int socket, optstruct* opt);
int socketpair(int *sock1, int *sock2);

#endif