socket.h

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#ifndef __NET__SOCKET_H__
#define __NET__SOCKET_H__
 
#include "ioforge/ioforge_nic.h"
#include "net/netdev.h"
#include <type.h>
 
/* Socket General */
typedef struct sockaddr {
    uint16_t sa_family;
    uint8_t sa_data[14];
} sockaddr_t;
 
/* Raw / packet socket: bind ke NIC + EtherType */
typedef struct sockaddr_ll {
    uint16_t sll_family;   /* AF_RAW atau AF_PACKET */
    uint16_t sll_protocol; /* EtherType (host byte order) */
    uint8_t sll_nic_id;    /* NIC id (0..MAX_NICS-1), 0xff = semua NIC */
    uint8_t sll_mac[NIC_MAC_LEN];
    uint8_t _pad;
} sockaddr_ll_t;
 
/* IPv4 socket address */
typedef struct sockaddr_in {
    uint16_t sin_family; /* AF_INET */
    uint16_t sin_port;   /* port dalam network byte order */
    uint32_t sin_addr;   /* IP dalam network byte order   */
    uint8_t _pad[8];
} sockaddr_in_t;
 
typedef struct socket socket_t;
typedef struct socket_ops {
    int (*recv)(socket_t* socket, void* buffer, size_t size);
    // recv with zero copy
    int (*recv_zc)(socket_t* socket, void** buffer, size_t size);
 
    int (*bind)(socket_t* socket, sockaddr_in_t* addr, uint32_t len);
    int (*set_sockopt)(socket_t* socket, uint32_t level, uint32_t optname,
               const void* optval, uint32_t optlen);
} socket_ops_t;
 
typedef enum {
    AF_RAW = 0,   /* raw Ethernet frame (L2)                */
    AF_INET = 2, /* IPv4 (TCP/UDP — diimplementasi di atas) */
    AF_INET6 = 10,  /* IPv6                                    */
    AF_PACKET = 17, /* Linux-style packet socket               */
} sock_family_t;
 
typedef enum {
    SOCK_RAW = 0,    /* raw, tidak ada transport header         */
    SOCK_DGRAM = 1,    /* datagram (UDP-style, connectionless)    */
    SOCK_STREAM = 2, /* stream (TCP-style, connection-oriented) */
} sock_type_t;
 
struct socket {
    sock_family_t family;
    sock_type_t type;
    uint16_t protocol;
 
    /* untuk binding */
    netdev_t* netdev;
 
    uint8_t nonblocking; /* SO_NONBLOCK?  */
    uint8_t broadcast;   /* SO_BROADCAST? */
 
    sockaddr_in_t local_addr;
    sockaddr_in_t remote_addr;
 
    // statistik
    uint64_t rx_packets;
    uint64_t tx_packets;
    uint64_t rx_dropped;
 
    uint8_t _in_use;
 
    // ops
    socket_ops_t* ops;
};
 
void vxSocket(sock_family_t family, sock_type_t type, uint16_t protocol,
          socket_t** socket);
 
/* sock option*/
#define SOL_SOCKET 1
#define IPPROTO_IP 0
#define IPPROTO_TCP 6
#define IPPROTO_UDP 17
 
#define SO_BINDTODEVICE 25 /* bind ke netdvev, default by route table      */
#define SO_RCVBUF 8    /* ukuran RX buffer                   */
#define SO_SNDBUF 7    /* ukuran TX buffer                   */
#define SO_BROADCAST 6     /* izinkan broadcast                  */
#define SO_PROMISC 200     /* aktifkan promiscuous di NIC terikat */
#define SO_NONBLOCK 201    /* non-blocking mode                  */
 
/* error type */
#define SOCK_OK 0
#define SOCK_ERR_NOFD -1    /* tidak ada file descriptor kosong   */
#define SOCK_ERR_INVAL -2   /* argumen tidak valid                */
#define SOCK_ERR_NODEV -3   /* NIC tidak ditemukan                */
#define SOCK_ERR_AGAIN -4   /* non-blocking, tidak ada data       */
#define SOCK_ERR_NOMEM -5   /* buffer pool habis                  */
#define SOCK_ERR_NOTCONN -6 /* belum connect()                    */
 
#endif // __NET__SOCKET_H__