/* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for the AF_INET socket handler. * * Version: @(#)sock.h 1.0.4 05/13/93 * * Authors: Ross Biro, * Fred N. van Kempen, * Corey Minyard * Florian La Roche * * Fixes: * Alan Cox : Volatiles in skbuff pointers. See * skbuff comments. May be overdone, * better to prove they can be removed * than the reverse. * Alan Cox : Added a zapped field for tcp to note * a socket is reset and must stay shut up * Alan Cox : New fields for options * Pauline Middelink : identd support * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _SOCK_H #define _SOCK_H #include #include /* struct options */ #include /* struct tcphdr */ #include #include /* struct sk_buff */ #include "protocol.h" /* struct inet_protocol */ #ifdef CONFIG_AX25 #include "ax25.h" #endif #ifdef CONFIG_IPX #include "ipx.h" #endif #ifdef CONFIG_ATALK #include #endif #include #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; }; #define TIME_WRITE 1 #define TIME_CLOSE 2 #define TIME_KEEPOPEN 3 #define TIME_DESTROY 4 #define TIME_DONE 5 /* used to absorb those last few packets */ #define TIME_PROBE0 6 #define SOCK_DESTROY_TIME 1000 /* about 10 seconds */ #define PROT_SOCK 1024 /* Sockets 0-1023 can't be bound too unless you are superuser */ #define SHUTDOWN_MASK 3 #define RCV_SHUTDOWN 1 #define SEND_SHUTDOWN 2 extern void destroy_sock(struct sock *sk); extern unsigned short get_new_socknum(struct proto *, unsigned short); extern void put_sock(unsigned short, struct sock *); extern void release_sock(struct sock *sk); extern struct sock *get_sock(struct proto *, unsigned short, unsigned long, unsigned short, unsigned long); extern struct sock *get_sock_mcast(struct sock *, unsigned short, unsigned long, unsigned short, unsigned long); extern struct sock *get_sock_raw(struct sock *, unsigned short, unsigned long, unsigned long); extern struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force, int priority); extern struct sk_buff *sock_rmalloc(struct sock *sk, unsigned long size, int force, int priority); extern void sock_wfree(struct sock *sk, struct sk_buff *skb, unsigned long size); extern void sock_rfree(struct sock *sk, struct sk_buff *skb, unsigned long size); extern unsigned long sock_rspace(struct sock *sk); extern unsigned long sock_wspace(struct sock *sk); extern int sock_setsockopt(struct sock *sk,int level,int op,char *optval,int optlen); extern int sock_getsockopt(struct sock *sk,int level,int op,char *optval,int *optlen); extern struct sk_buff *sock_alloc_send_skb(struct sock *skb, unsigned long size, int noblock, int *errcode); extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb); /* declarations from timer.c */ extern struct sock *timer_base; void delete_timer (struct sock *); void reset_timer (struct sock *, int, unsigned long); void net_timer (unsigned long); #endif /* _SOCK_H */