socket.h

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#pragma once

#include <stdint.h>
#include <sys/time.h>

#define SOL_SOCKET  0xFFFF

#define PF_UNSPEC   0
#define PF_INET     2
#define PF_INET6    10

#define AF_UNSPEC   PF_UNSPEC
#define AF_INET     PF_INET
#define AF_INET6    PF_INET6

#define SOCK_STREAM 1
#define SOCK_DGRAM  2

#define MSG_CTRUNC  0x01000000
#define MSG_DONTROUTE   0x02000000
#define MSG_EOR     0x04000000
#define MSG_OOB     0x08000000
#define MSG_PEEK    0x10000000
#define MSG_TRUNC   0x20000000
#define MSG_WAITALL 0x40000000

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

#define SO_DEBUG    0x0001
#define SO_ACCEPTCONN   0x0002
#define SO_REUSEADDR    0x0004
#define SO_KEEPALIVE    0x0008
#define SO_DONTROUTE    0x0010
#define SO_BROADCAST    0x0020
#define SO_USELOOPBACK  0x0040
#define SO_LINGER   0x0080
#define SO_OOBINLINE    0x0100
#define SO_REUSEPORT    0x0200
#define SO_SNDBUF   0x1001
#define SO_RCVBUF   0x1002
#define SO_SNDLOWAT 0x1003
#define SO_RCVLOWAT 0x1004
#define SO_SNDTIMEO 0x1005
#define SO_RCVTIMEO 0x1006
#define SO_ERROR    0x1007
#define SO_TYPE     0x1008

typedef uint32_t socklen_t;
typedef uint16_t sa_family_t;

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

struct sockaddr_storage {
    sa_family_t ss_family;
    char        __ss_padding[14];
};

struct linger {
    int l_onoff;
    int l_linger;
};

#ifdef __cplusplus
extern "C" {
#endif

    int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
    int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
    int closesocket(int sockfd);
    int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
    int getpeername(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
    int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
    int getsockopt(int sockfd, int level, int optname, void *optval, socklen_t *optlen);
    int listen(int sockfd, int backlog);
    ssize_t recv(int sockfd, void *buf, size_t len, int flags);
    ssize_t recvfrom(int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen);
    ssize_t send(int sockfd, const 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);
    int setsockopt(int sockfd, int level, int optname, const void *optval, socklen_t optlen);
    int shutdown(int sockfd, int how);
    int socket(int domain, int type, int protocol);
    int sockatmark(int sockfd);

#ifdef __cplusplus
}
#endif