#ifndef _SYS_SOCKET_H
#define _SYS_SOCKET_H
#include <sys/types.h>
#include <stdint.h>

#define AF_UNSPEC  0
#define AF_UNIX    1
#define AF_LOCAL   AF_UNIX
#define AF_INET    2
#define AF_INET6   10
#define AF_PACKET  17

#define PF_UNSPEC  AF_UNSPEC
#define PF_UNIX    AF_UNIX
#define PF_LOCAL   AF_LOCAL
#define PF_INET    AF_INET
#define PF_INET6   AF_INET6

#define SOCK_STREAM    1
#define SOCK_DGRAM     2
#define SOCK_RAW       3
#define SOCK_SEQPACKET 5
#define SOCK_CLOEXEC   0x80000
#define SOCK_NONBLOCK  0x800
#define SOCK_RDM       4

#define SOL_SOCKET 1
#define SO_REUSEADDR 2
#define SO_ERROR     4
#define SO_BROADCAST 6
#define SO_SNDBUF    7
#define SO_RCVBUF    8
#define SO_KEEPALIVE 9
#define SO_LINGER   13
#define SO_REUSEPORT 15
#define SO_RCVTIMEO 20
#define SO_SNDTIMEO 21
#define SO_BINDTODEVICE 25

#define MSG_OOB       1
#define MSG_PEEK      2
#define MSG_DONTROUTE 4
#define MSG_DONTWAIT  0x40
#define MSG_NOSIGNAL  0x4000

#define SHUT_RD   0
#define SHUT_WR   1
#define SHUT_RDWR 2

typedef unsigned int socklen_t;
typedef unsigned short sa_family_t;

struct sockaddr {
    sa_family_t sa_family;
    char sa_data[14];
};

struct sockaddr_storage {
    sa_family_t ss_family;
    char __ss_padding[126];
};

struct linger {
    int l_onoff;
    int l_linger;
};

struct iovec {
    void* iov_base;
    size_t iov_len;
};

struct msghdr {
    void* msg_name;
    socklen_t msg_namelen;
    struct iovec* msg_iov;
    size_t msg_iovlen;
    void* msg_control;
    size_t msg_controllen;
    int msg_flags;
};

struct cmsghdr {
    size_t cmsg_len;
    int cmsg_level;
    int cmsg_type;
};

int socket(int domain, int type, int protocol);
int bind(int sockfd, const struct sockaddr* addr, socklen_t addrlen);
int listen(int sockfd, int backlog);
int accept(int sockfd, struct sockaddr* addr, socklen_t* addrlen);
int connect(int sockfd, const struct sockaddr* addr, socklen_t addrlen);
ssize_t send(int sockfd, const void* buf, size_t len, int flags);
ssize_t recv(int sockfd, void* buf, size_t len, int flags);
ssize_t sendto(int sockfd, const void* buf, size_t len, int flags,
               const struct sockaddr* dest_addr, socklen_t addrlen);
ssize_t recvfrom(int sockfd, void* buf, size_t len, int flags,
                 struct sockaddr* src_addr, socklen_t* addrlen);
ssize_t sendmsg(int sockfd, const struct msghdr* msg, int flags);
ssize_t recvmsg(int sockfd, struct msghdr* msg, int flags);
int setsockopt(int sockfd, int level, int optname, const void* optval, socklen_t optlen);
int getsockopt(int sockfd, int level, int optname, void* optval, socklen_t* optlen);
int getpeername(int sockfd, struct sockaddr* addr, socklen_t* addrlen);
int getsockname(int sockfd, struct sockaddr* addr, socklen_t* addrlen);
int shutdown(int sockfd, int how);
int socketpair(int domain, int type, int protocol, int sv[2]);
#endif