linux-1.2.13\linux\net\inet\sock.h 文件中定义了sock和 proto两个结构体：
#define SOCK_ARRAY_SIZE 256 /* Think big (also on some systems a byte is faster */
/*
* This structure really needs to be cleaned up.
* Most of it is for TCP, and not used by any of
* the other protocols.
*/
struct sock {
struct options *opt;
volatile unsigned long wmem_alloc;
volatile unsigned long rmem_alloc;
unsigned long write_seq;
unsigned long sent_seq;
unsigned long acked_seq;
unsigned long copied_seq;
unsigned long rcv_ack_seq;
unsigned long window_seq;
unsigned long fin_seq;
unsigned long urg_seq;
unsigned long urg_data;
/*
* Not all are volatile, but some are, so we
* might as well say they all are.
*/
volatile char inuse,
dead,
urginline,
intr,
blog,
done,
reuse,
keepopen,
linger,
delay_acks,
destroy,
ack_timed,
no_check,
zapped, /* In ax25 & ipx means not linked */
broadcast,
nonagle;
unsigned long lingertime;
int proc;
struct sock *next;
struct sock *prev; /* Doubly linked chain.. */
struct sock *pair;
struct sk_buff * volatile send_head;
struct sk_buff * volatile send_tail;
struct sk_buff_head back_log;
struct sk_buff *partial;
struct timer_list partial_timer;
long retransmits;
struct sk_buff_head write_queue,
receive_queue;
struct proto *prot;
struct wait_queue **sleep;
unsigned long daddr;
unsigned long saddr;
unsigned short max_unacked;
unsigned short window;
unsigned short bytes_rcv;
/* mss is min(mtu, max_window) */
unsigned short mtu; /* mss negotiated in the syn's */
volatile unsigned short mss; /* current eff. mss - can change */
volatile unsigned short user_mss; /* mss requested by user in ioctl */
volatile unsigned short max_window;
unsigned long window_clamp;
unsigned short num;
volatile unsigned short cong_window;
volatile unsigned short cong_count;
volatile unsigned short ssthresh;
volatile unsigned short packets_out;
volatile unsigned short shutdown;
volatile unsigned long rtt;
volatile unsigned long mdev;
volatile unsigned long rto;
/* currently backoff isn't used, but I'm maintaining it in case
* we want to go back to a backoff formula that needs it
*/
volatile unsigned short backoff;
volatile short err;
unsigned char protocol;
volatile unsigned char state;
volatile unsigned char ack_backlog;
unsigned char max_ack_backlog;
unsigned char priority;
unsigned char debug;
unsigned short rcvbuf;
unsigned short sndbuf;
unsigned short type;
unsigned char localroute; /* Route locally only */
#ifdef CONFIG_IPX
ipx_address ipx_dest_addr;
ipx_interface *ipx_intrfc;
unsigned short ipx_port;
unsigned short ipx_type;
#endif
#ifdef CONFIG_AX25
/* Really we want to add a per protocol private area */
ax25_address ax25_source_addr,ax25_dest_addr;
struct sk_buff *volatile ax25_retxq[8];
char ax25_state,ax25_vs,ax25_vr,ax25_lastrxnr,ax25_lasttxnr;
char ax25_condition;
char ax25_retxcnt;
char ax25_xx;
char ax25_retxqi;
char ax25_rrtimer;
char ax25_timer;
unsigned char ax25_n2;
unsigned short ax25_t1,ax25_t2,ax25_t3;
ax25_digi *ax25_digipeat;
#endif
#ifdef CONFIG_ATALK
struct atalk_sock at;
#endif
/* IP 'private area' or will be eventually */
int ip_ttl; /* TTL setting */
int ip_tos; /* TOS */
struct tcphdr dummy_th;
struct timer_list keepalive_timer; /* TCP keepalive hack */
struct timer_list retransmit_timer; /* TCP retransmit timer */
struct timer_list ack_timer; /* TCP delayed ack timer */
int ip_xmit_timeout; /* Why the timeout is running */
#ifdef CONFIG_IP_MULTICAST
int ip_mc_ttl; /* Multicasting TTL */
int ip_mc_loop; /* Loopback (not implemented yet) */
char ip_mc_name[MAX_ADDR_LEN]; /* Multicast device name */
struct ip_mc_socklist *ip_mc_list; /* Group array */
#endif
/* This part is used for the timeout functions (timer.c). */
int timeout; /* What are we waiting for? */
struct timer_list timer; /* This is the TIME_WAIT/receive timer when we are doing IP */
struct timeval stamp;
/* identd */
struct socket *socket;
/* Callbacks */
void (*state_change)(struct sock *sk);
void (*data_ready)(struct sock *sk,int bytes);
void (*write_space)(struct sock *sk);
void (*error_report)(struct sock *sk);
};
struct proto {
struct sk_buff * (*wmalloc)(struct sock *sk,
unsigned long size, int force,
int priority);
struct sk_buff * (*rmalloc)(struct sock *sk,
unsigned long size, int force,
int priority);
void (*wfree)(struct sock *sk, struct sk_buff *skb,
unsigned long size);
void (*rfree)(struct sock *sk, struct sk_buff *skb,
unsigned long size);
unsigned long (*rspace)(struct sock *sk);
unsigned long (*wspace)(struct sock *sk);
void (*close)(struct sock *sk, int timeout);
int (*read)(struct sock *sk, unsigned char *to,
int len, int nonblock, unsigned flags);
int (*write)(struct sock *sk, unsigned char *to,
int len, int nonblock, unsigned flags);
int (*sendto)(struct sock *sk,
unsigned char *from, int len, int noblock,
unsigned flags, struct sockaddr_in *usin,
int addr_len);
int (*recvfrom)(struct sock *sk,
unsigned char *from, int len, int noblock,
unsigned flags, struct sockaddr_in *usin,
int *addr_len);
int (*build_header)(struct sk_buff *skb,
unsigned long saddr,
unsigned long daddr,
struct device **dev, int type,
struct options *opt, int len, int tos, int ttl);
int (*connect)(struct sock *sk,
struct sockaddr_in *usin, int addr_len);
struct sock * (*accept) (struct sock *sk, int flags);
void (*queue_xmit)(struct sock *sk,
struct device *dev, struct sk_buff *skb,
int free);
void (*retransmit)(struct sock *sk, int all);
void (*write_wakeup)(struct sock *sk);
void (*read_wakeup)(struct sock *sk);
int (*rcv)(struct sk_buff *buff, struct device *dev,
struct options *opt, unsigned long daddr,
unsigned short len, unsigned long saddr,
int redo, struct inet_protocol *protocol);
int (*select)(struct sock *sk, int which,
select_table *wait);
int (*ioctl)(struct sock *sk, int cmd,
unsigned long arg);
int (*init)(struct sock *sk);
void (*shutdown)(struct sock *sk, int how);
int (*setsockopt)(struct sock *sk, int level, int optname,
char *optval, int optlen);
int (*getsockopt)(struct sock *sk, int level, int optname,
char *optval, int *option);
unsigned short max_header;
unsigned long retransmits;
struct sock * sock_array[SOCK_ARRAY_SIZE];
char name[80];
int inuse, highestinuse;
};
linux-1.2.13\linux\include\linux\net.h 定义了socket和proto_ops两个结构体
struct socket {
short type; /* SOCK_STREAM, ... */
socket_state state;
long flags;
struct proto_ops *ops; /* protocols do most everything */
void *data; /* protocol data */
struct socket *conn; /* server socket connected to */
struct socket *iconn; /* incomplete client conn.s */
struct socket *next;
struct wait_queue **wait; /* ptr to place to wait on */
struct inode *inode;
struct fasync_struct *fasync_list; /* Asynchronous wake up list */
};
#define SOCK_INODE(S) ((S)->inode)
struct proto_ops {
int family;
int (*create) (struct socket *sock, int protocol);
int (*dup) (struct socket *newsock, struct socket *oldsock);
int (*release) (struct socket *sock, struct socket *peer);
int (*bind) (struct socket *sock, struct sockaddr *umyaddr,
int sockaddr_len);
int (*connect) (struct socket *sock, struct sockaddr *uservaddr,
int sockaddr_len, int flags);
int (*socketpair) (struct socket *sock1, struct socket *sock2);
int (*accept) (struct socket *sock, struct socket *newsock,
int flags);
int (*getname) (struct socket *sock, struct sockaddr *uaddr,
int *usockaddr_len, int peer);
int (*read) (struct socket *sock, char *ubuf, int size,
int nonblock);
int (*write) (struct socket *sock, char *ubuf, int size,
int nonblock);
int (*select) (struct socket *sock, int sel_type,
select_table *wait);
int (*ioctl) (struct socket *sock, unsigned int cmd,
unsigned long arg);
int (*listen) (struct socket *sock, int len);
int (*send) (struct socket *sock, void *buff, int len, int nonblock,
unsigned flags);
int (*recv) (struct socket *sock, void *buff, int len, int nonblock,
unsigned flags);
int (*sendto) (struct socket *sock, void *buff, int len, int nonblock,
unsigned flags, struct sockaddr *, int addr_len);
int (*recvfrom) (struct socket *sock, void *buff, int len, int nonblock,
unsigned flags, struct sockaddr *, int *addr_len);
int (*shutdown) (struct socket *sock, int flags);
int (*setsockopt) (struct socket *sock, int level, int optname,
char *optval, int optlen);
int (*getsockopt) (struct socket *sock, int level, int optname,
char *optval, int *optlen);
int (*fcntl) (struct socket *sock, unsigned int cmd,
unsigned long arg);
};
linux-1.2.13\linux\include\linux\fs.h 文件定义 inode 和 file 结构体
struct inode {
dev_t i_dev;
unsigned long i_ino;
umode_t i_mode;
nlink_t i_nlink;
uid_t i_uid;
gid_t i_gid;
dev_t i_rdev;
off_t i_size;
time_t i_atime;
time_t i_mtime;
time_t i_ctime;
unsigned long i_blksize;
unsigned long i_blocks;
unsigned long i_version;
struct semaphore i_sem;
struct inode_operations * i_op;
struct super_block * i_sb;
struct wait_queue * i_wait;
struct file_lock * i_flock;
struct vm_area_struct * i_mmap;
struct inode * i_next, * i_prev;
struct inode * i_hash_next, * i_hash_prev;
struct inode * i_bound_to, * i_bound_by;
struct inode * i_mount;
unsigned short i_count;
unsigned short i_wcount;
unsigned short i_flags;
unsigned char i_lock;
unsigned char i_dirt;
unsigned char i_pipe;
unsigned char i_sock;
unsigned char i_seek;
unsigned char i_update;
union {
struct pipe_inode_info pipe_i;
struct minix_inode_info minix_i;
struct ext_inode_info ext_i;
struct ext2_inode_info ext2_i;
struct hpfs_inode_info hpfs_i;
struct msdos_inode_info msdos_i;
struct umsdos_inode_info umsdos_i;
struct iso_inode_info isofs_i;
struct nfs_inode_info nfs_i;
struct xiafs_inode_info xiafs_i;
struct sysv_inode_info sysv_i;
struct socket socket_i;
void * generic_ip;
} u;
};
struct file {
mode_t f_mode;
loff_t f_pos;
unsigned short f_flags;
unsigned short f_count;
off_t f_reada;
struct file *f_next, *f_prev;
int f_owner; /* pid or -pgrp where SIGIO should be sent */
struct inode * f_inode;
struct file_operations * f_op;
unsigned long f_version;
void *private_data; /* needed for tty driver, and maybe others */
};
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