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199 |
simons |
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the AF_INET socket handler.
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*
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* Version: @(#)sock.h 1.0.4 05/13/93
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*
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* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Corey Minyard <wf-rch!minyard@relay.EU.net>
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* Florian La Roche <flla@stud.uni-sb.de>
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*
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* Fixes:
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* Alan Cox : Volatiles in skbuff pointers. See
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* skbuff comments. May be overdone,
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* better to prove they can be removed
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* than the reverse.
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* Alan Cox : Added a zapped field for tcp to note
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* a socket is reset and must stay shut up
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* Alan Cox : New fields for options
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* Pauline Middelink : identd support
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* Alan Cox : Eliminate low level recv/recvfrom
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* David S. Miller : New socket lookup architecture for ISS.
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* Elliot Poger : New field for SO_BINDTODEVICE option.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _SOCK_H
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#define _SOCK_H
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#include <linux/timer.h>
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#include <linux/ip.h> /* struct options */
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#include <linux/in.h> /* struct sockaddr_in */
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#include <linux/tcp.h> /* struct tcphdr */
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#include <linux/config.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h> /* struct sk_buff */
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#include <net/protocol.h> /* struct inet_protocol */
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#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
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#include <net/ax25.h>
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#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
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#include <net/netrom.h>
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#endif
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#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
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#include <net/rose.h>
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#endif
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#endif
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#if defined(CONFIG_IPX) || defined(CONFIG_IPX_MODULE)
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#include <net/ipx.h>
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#endif
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#if defined(CONFIG_ATALK) || defined(CONFIG_ATALK_MODULE)
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#include <linux/atalk.h>
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#endif
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#include <linux/igmp.h>
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#include <asm/atomic.h>
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/*
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* The AF_UNIX specific socket options
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*/
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struct unix_opt
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{
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int family;
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char * name;
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int locks;
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struct inode * inode;
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struct semaphore readsem;
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struct sock * other;
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int marksweep;
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#define MARKED 1
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int inflight;
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};
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/*
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* IP packet socket options
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*/
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struct inet_packet_opt
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{
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struct notifier_block notifier; /* Used when bound */
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struct device *bound_dev;
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unsigned long dev_stamp;
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struct packet_type *prot_hook;
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char device_name[15];
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};
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/*
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* Once the IPX ncpd patches are in these are going into protinfo
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*/
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#if defined(CONFIG_IPX) || defined(CONFIG_IPX_MODULE)
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struct ipx_opt
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{
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ipx_address dest_addr;
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ipx_interface *intrfc;
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unsigned short port;
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#ifdef CONFIG_IPX_INTERN
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unsigned char node[IPX_NODE_LEN];
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#endif
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unsigned short type;
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/*
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* To handle asynchronous messages from the NetWare server, we have to
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* know the connection this socket belongs to.
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*/
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struct ncp_server *ncp_server;
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/*
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* To handle special ncp connection-handling sockets for mars_nwe,
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* the connection number must be stored in the socket.
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*/
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unsigned short ipx_ncp_conn;
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};
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#endif
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#ifdef CONFIG_NUTCP
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struct tcp_opt
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{
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/*
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* RFC793 variables by their proper names. This means you can
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* read the code and the spec side by side (and laugh ...)
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* See RFC793 and RFC1122. The RFC writes these in capitals.
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*/
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__u32 rcv_nxt; /* What we want to receive next */
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__u32 rcv_up; /* The urgent point (may not be valid) */
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__u32 rcv_wnd; /* Current receiver window */
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__u32 snd_nxt; /* Next sequence we send */
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__u32 snd_una; /* First byte we want an ack for */
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__u32 snd_up; /* Outgoing urgent pointer */
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__u32 snd_wl1; /* Sequence for window update */
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__u32 snd_wl2; /* Ack sequence for update */
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/*
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* Slow start and congestion control (see also Nagle, and Karn & Partridge)
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*/
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__u32 snd_cwnd; /* Sending congestion window */
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__u32 snd_ssthresh; /* Slow start size threshold */
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/*
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* Timers used by the TCP protocol layer
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*/
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struct timer_list delack_timer; /* Ack delay */
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struct timer_list idle_timer; /* Idle watch */
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struct timer_list completion_timer; /* Up/Down timer */
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struct timer_list probe_timer; /* Probes */
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struct timer_list retransmit_timer; /* Resend (no ack) */
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};
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#endif
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| 156 |
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/*
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* This structure really needs to be cleaned up.
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* Most of it is for TCP, and not used by any of
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* the other protocols.
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*/
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struct sock
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{
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/* This must be first. */
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struct sock *sklist_next;
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struct sock *sklist_prev;
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struct options *opt;
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| 168 |
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atomic_t wmem_alloc;
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atomic_t rmem_alloc;
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| 170 |
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unsigned long allocation; /* Allocation mode */
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| 171 |
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__u32 write_seq;
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| 172 |
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__u32 sent_seq;
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| 173 |
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__u32 acked_seq;
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__u32 copied_seq;
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| 175 |
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__u32 rcv_ack_seq;
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| 176 |
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unsigned short rcv_ack_cnt; /* count of same ack */
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__u32 window_seq;
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__u32 fin_seq;
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| 179 |
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__u32 urg_seq;
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| 180 |
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__u32 urg_data;
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| 181 |
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__u32 syn_seq;
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| 182 |
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int users; /* user count */
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/*
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| 184 |
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* Not all are volatile, but some are, so we
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| 185 |
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* might as well say they all are.
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*/
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volatile char dead,
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urginline,
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intr,
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blog,
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done,
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reuse,
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keepopen,
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linger,
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delay_acks,
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destroy,
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ack_timed,
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no_check,
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zapped, /* In ax25 & ipx means not linked */
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broadcast,
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nonagle,
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bsdism;
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| 203 |
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struct device * bound_device;
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| 204 |
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unsigned long lingertime;
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| 205 |
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int proc;
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| 206 |
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| 207 |
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struct sock *next;
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| 208 |
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struct sock **pprev;
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| 209 |
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struct sock *bind_next;
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| 210 |
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struct sock **bind_pprev;
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| 211 |
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struct sock *pair;
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| 212 |
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int hashent;
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| 213 |
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struct sock *prev;
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| 214 |
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struct sk_buff * volatile send_head;
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| 215 |
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struct sk_buff * volatile send_next;
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| 216 |
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struct sk_buff * volatile send_tail;
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| 217 |
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struct sk_buff_head back_log;
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| 218 |
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struct sk_buff *partial;
|
| 219 |
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struct timer_list partial_timer;
|
| 220 |
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long retransmits;
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| 221 |
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struct sk_buff_head write_queue,
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| 222 |
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receive_queue;
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| 223 |
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struct proto *prot;
|
| 224 |
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struct wait_queue **sleep;
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| 225 |
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__u32 daddr;
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| 226 |
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__u32 saddr; /* Sending source */
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| 227 |
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__u32 rcv_saddr; /* Bound address */
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| 228 |
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unsigned short max_unacked;
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| 229 |
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unsigned short window;
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| 230 |
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__u32 lastwin_seq; /* sequence number when we last updated the window we offer */
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| 231 |
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__u32 high_seq; /* sequence number when we did current fast retransmit */
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| 232 |
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volatile unsigned long ato; /* ack timeout */
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| 233 |
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volatile unsigned long lrcvtime; /* jiffies at last data rcv */
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| 234 |
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volatile unsigned long idletime; /* jiffies at last rcv */
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| 235 |
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unsigned int bytes_rcv;
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| 236 |
|
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/*
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| 237 |
|
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* mss is min(mtu, max_window)
|
| 238 |
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*/
|
| 239 |
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unsigned short mtu; /* mss negotiated in the syn's */
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| 240 |
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volatile unsigned short mss; /* current eff. mss - can change */
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| 241 |
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volatile unsigned short user_mss; /* mss requested by user in ioctl */
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| 242 |
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volatile unsigned short max_window;
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| 243 |
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unsigned long window_clamp;
|
| 244 |
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unsigned int ssthresh;
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| 245 |
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unsigned short num;
|
| 246 |
|
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volatile unsigned short cong_window;
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| 247 |
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volatile unsigned short cong_count;
|
| 248 |
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volatile unsigned short packets_out;
|
| 249 |
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volatile unsigned short shutdown;
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| 250 |
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volatile unsigned long rtt;
|
| 251 |
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volatile unsigned long mdev;
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| 252 |
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volatile unsigned long rto;
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| 253 |
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|
| 254 |
|
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/*
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| 255 |
|
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* currently backoff isn't used, but I'm maintaining it in case
|
| 256 |
|
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* we want to go back to a backoff formula that needs it
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| 257 |
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*/
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| 258 |
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| 259 |
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volatile unsigned short backoff;
|
| 260 |
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int err, err_soft; /* Soft holds errors that don't
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| 261 |
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cause failure but are the cause
|
| 262 |
|
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of a persistent failure not just
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| 263 |
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'timed out' */
|
| 264 |
|
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unsigned char protocol;
|
| 265 |
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volatile unsigned char state;
|
| 266 |
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unsigned short ack_backlog;
|
| 267 |
|
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unsigned char priority;
|
| 268 |
|
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unsigned char debug;
|
| 269 |
|
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int rcvbuf;
|
| 270 |
|
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int sndbuf;
|
| 271 |
|
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unsigned short type;
|
| 272 |
|
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unsigned char localroute; /* Route locally only */
|
| 273 |
|
|
|
| 274 |
|
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/*
|
| 275 |
|
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* This is where all the private (optional) areas that don't
|
| 276 |
|
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* overlap will eventually live.
|
| 277 |
|
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*/
|
| 278 |
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|
| 279 |
|
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union
|
| 280 |
|
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{
|
| 281 |
|
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struct unix_opt af_unix;
|
| 282 |
|
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#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
|
| 283 |
|
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ax25_cb *ax25;
|
| 284 |
|
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#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
|
| 285 |
|
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nr_cb *nr;
|
| 286 |
|
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#endif
|
| 287 |
|
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#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
|
| 288 |
|
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rose_cb *rose;
|
| 289 |
|
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#endif
|
| 290 |
|
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#endif
|
| 291 |
|
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#if defined(CONFIG_ATALK) || defined(CONFIG_ATALK_MODULE)
|
| 292 |
|
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struct atalk_sock af_at;
|
| 293 |
|
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#endif
|
| 294 |
|
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#if defined(CONFIG_IPX) || defined(CONFIG_IPX_MODULE)
|
| 295 |
|
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struct ipx_opt af_ipx;
|
| 296 |
|
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#endif
|
| 297 |
|
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#ifdef CONFIG_INET
|
| 298 |
|
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struct inet_packet_opt af_packet;
|
| 299 |
|
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#ifdef CONFIG_NUTCP
|
| 300 |
|
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struct tcp_opt af_tcp;
|
| 301 |
|
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#endif
|
| 302 |
|
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#endif
|
| 303 |
|
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} protinfo;
|
| 304 |
|
|
|
| 305 |
|
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/*
|
| 306 |
|
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* IP 'private area' or will be eventually
|
| 307 |
|
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*/
|
| 308 |
|
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int ip_ttl; /* TTL setting */
|
| 309 |
|
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int ip_tos; /* TOS */
|
| 310 |
|
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struct tcphdr dummy_th;
|
| 311 |
|
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struct timer_list keepalive_timer; /* TCP keepalive hack */
|
| 312 |
|
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struct timer_list retransmit_timer; /* TCP retransmit timer */
|
| 313 |
|
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struct timer_list delack_timer; /* TCP delayed ack timer */
|
| 314 |
|
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int ip_xmit_timeout; /* Why the timeout is running */
|
| 315 |
|
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struct rtable *ip_route_cache; /* Cached output route */
|
| 316 |
|
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unsigned char ip_hdrincl; /* Include headers ? */
|
| 317 |
|
|
#ifdef CONFIG_IP_MULTICAST
|
| 318 |
|
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int ip_mc_ttl; /* Multicasting TTL */
|
| 319 |
|
|
int ip_mc_loop; /* Loopback */
|
| 320 |
|
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char ip_mc_name[MAX_ADDR_LEN];/* Multicast device name */
|
| 321 |
|
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struct ip_mc_socklist *ip_mc_list; /* Group array */
|
| 322 |
|
|
#endif
|
| 323 |
|
|
|
| 324 |
|
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/*
|
| 325 |
|
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* This part is used for the timeout functions (timer.c).
|
| 326 |
|
|
*/
|
| 327 |
|
|
|
| 328 |
|
|
int timeout; /* What are we waiting for? */
|
| 329 |
|
|
struct timer_list timer; /* This is the TIME_WAIT/receive timer
|
| 330 |
|
|
* when we are doing IP
|
| 331 |
|
|
*/
|
| 332 |
|
|
struct timeval stamp;
|
| 333 |
|
|
|
| 334 |
|
|
/*
|
| 335 |
|
|
* Identd
|
| 336 |
|
|
*/
|
| 337 |
|
|
|
| 338 |
|
|
struct socket *socket;
|
| 339 |
|
|
|
| 340 |
|
|
/*
|
| 341 |
|
|
* Callbacks
|
| 342 |
|
|
*/
|
| 343 |
|
|
|
| 344 |
|
|
void (*state_change)(struct sock *sk);
|
| 345 |
|
|
void (*data_ready)(struct sock *sk,int bytes);
|
| 346 |
|
|
void (*write_space)(struct sock *sk);
|
| 347 |
|
|
void (*error_report)(struct sock *sk);
|
| 348 |
|
|
|
| 349 |
|
|
/*
|
| 350 |
|
|
* Moved solely for 2.0 to keep binary module compatibility stuff straight.
|
| 351 |
|
|
*/
|
| 352 |
|
|
|
| 353 |
|
|
unsigned short max_ack_backlog;
|
| 354 |
|
|
struct sock *listening;
|
| 355 |
|
|
};
|
| 356 |
|
|
|
| 357 |
|
|
/*
|
| 358 |
|
|
* IP protocol blocks we attach to sockets.
|
| 359 |
|
|
*/
|
| 360 |
|
|
|
| 361 |
|
|
struct proto
|
| 362 |
|
|
{
|
| 363 |
|
|
/* These must be first. */
|
| 364 |
|
|
struct sock *sklist_next;
|
| 365 |
|
|
struct sock *sklist_prev;
|
| 366 |
|
|
|
| 367 |
|
|
void (*close)(struct sock *sk, unsigned long timeout);
|
| 368 |
|
|
int (*build_header)(struct sk_buff *skb,
|
| 369 |
|
|
__u32 saddr,
|
| 370 |
|
|
__u32 daddr,
|
| 371 |
|
|
struct device **dev, int type,
|
| 372 |
|
|
struct options *opt, int len,
|
| 373 |
|
|
int tos, int ttl, struct rtable ** rp);
|
| 374 |
|
|
int (*connect)(struct sock *sk,
|
| 375 |
|
|
struct sockaddr_in *usin, int addr_len);
|
| 376 |
|
|
struct sock * (*accept) (struct sock *sk, int flags);
|
| 377 |
|
|
void (*queue_xmit)(struct sock *sk,
|
| 378 |
|
|
struct device *dev, struct sk_buff *skb,
|
| 379 |
|
|
int free);
|
| 380 |
|
|
void (*retransmit)(struct sock *sk, int all);
|
| 381 |
|
|
void (*write_wakeup)(struct sock *sk);
|
| 382 |
|
|
void (*read_wakeup)(struct sock *sk);
|
| 383 |
|
|
int (*rcv)(struct sk_buff *buff, struct device *dev,
|
| 384 |
|
|
struct options *opt, __u32 daddr,
|
| 385 |
|
|
unsigned short len, __u32 saddr,
|
| 386 |
|
|
int redo, struct inet_protocol *protocol);
|
| 387 |
|
|
int (*select)(struct sock *sk, int which,
|
| 388 |
|
|
select_table *wait);
|
| 389 |
|
|
int (*ioctl)(struct sock *sk, int cmd,
|
| 390 |
|
|
unsigned long arg);
|
| 391 |
|
|
int (*init)(struct sock *sk);
|
| 392 |
|
|
void (*shutdown)(struct sock *sk, int how);
|
| 393 |
|
|
int (*setsockopt)(struct sock *sk, int level, int optname,
|
| 394 |
|
|
char *optval, int optlen);
|
| 395 |
|
|
int (*getsockopt)(struct sock *sk, int level, int optname,
|
| 396 |
|
|
char *optval, int *option);
|
| 397 |
|
|
int (*sendmsg)(struct sock *sk, struct msghdr *msg, int len,
|
| 398 |
|
|
int noblock, int flags);
|
| 399 |
|
|
int (*recvmsg)(struct sock *sk, struct msghdr *msg, int len,
|
| 400 |
|
|
int noblock, int flags, int *addr_len);
|
| 401 |
|
|
int (*bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len);
|
| 402 |
|
|
|
| 403 |
|
|
/* Keeping track of sk's, looking them up, and port selection methods. */
|
| 404 |
|
|
void (*hash)(struct sock *sk);
|
| 405 |
|
|
void (*unhash)(struct sock *sk);
|
| 406 |
|
|
void (*rehash)(struct sock *sk);
|
| 407 |
|
|
unsigned short (*good_socknum)(void);
|
| 408 |
|
|
int (*verify_bind)(struct sock *sk, unsigned short snum);
|
| 409 |
|
|
|
| 410 |
|
|
unsigned short max_header;
|
| 411 |
|
|
unsigned long retransmits;
|
| 412 |
|
|
char name[32];
|
| 413 |
|
|
int inuse, highestinuse;
|
| 414 |
|
|
};
|
| 415 |
|
|
|
| 416 |
|
|
#define TIME_WRITE 1
|
| 417 |
|
|
#define TIME_CLOSE 2
|
| 418 |
|
|
#define TIME_KEEPOPEN 3
|
| 419 |
|
|
#define TIME_DESTROY 4
|
| 420 |
|
|
#define TIME_DONE 5 /* Used to absorb those last few packets */
|
| 421 |
|
|
#define TIME_PROBE0 6
|
| 422 |
|
|
|
| 423 |
|
|
/*
|
| 424 |
|
|
* About 10 seconds
|
| 425 |
|
|
*/
|
| 426 |
|
|
|
| 427 |
|
|
#define SOCK_DESTROY_TIME (10*HZ)
|
| 428 |
|
|
|
| 429 |
|
|
/*
|
| 430 |
|
|
* Sockets 0-1023 can't be bound to unless you are superuser
|
| 431 |
|
|
*/
|
| 432 |
|
|
|
| 433 |
|
|
#define PROT_SOCK 1024
|
| 434 |
|
|
|
| 435 |
|
|
#define SHUTDOWN_MASK 3
|
| 436 |
|
|
#define RCV_SHUTDOWN 1
|
| 437 |
|
|
#define SEND_SHUTDOWN 2
|
| 438 |
|
|
|
| 439 |
|
|
/* Per-protocol hash table implementations use this to make sure
|
| 440 |
|
|
* nothing changes.
|
| 441 |
|
|
*/
|
| 442 |
|
|
#define SOCKHASH_LOCK() start_bh_atomic()
|
| 443 |
|
|
#define SOCKHASH_UNLOCK() end_bh_atomic()
|
| 444 |
|
|
|
| 445 |
|
|
/* Some things in the kernel just want to get at a protocols
|
| 446 |
|
|
* entire socket list commensurate, thus...
|
| 447 |
|
|
*/
|
| 448 |
|
|
static __inline__ void add_to_prot_sklist(struct sock *sk)
|
| 449 |
|
|
{
|
| 450 |
|
|
SOCKHASH_LOCK();
|
| 451 |
|
|
if(!sk->sklist_next) {
|
| 452 |
|
|
struct proto *p = sk->prot;
|
| 453 |
|
|
|
| 454 |
|
|
sk->sklist_prev = (struct sock *) p;
|
| 455 |
|
|
sk->sklist_next = p->sklist_next;
|
| 456 |
|
|
p->sklist_next->sklist_prev = sk;
|
| 457 |
|
|
p->sklist_next = sk;
|
| 458 |
|
|
|
| 459 |
|
|
/* Charge the protocol. */
|
| 460 |
|
|
sk->prot->inuse += 1;
|
| 461 |
|
|
if(sk->prot->highestinuse < sk->prot->inuse)
|
| 462 |
|
|
sk->prot->highestinuse = sk->prot->inuse;
|
| 463 |
|
|
}
|
| 464 |
|
|
SOCKHASH_UNLOCK();
|
| 465 |
|
|
}
|
| 466 |
|
|
|
| 467 |
|
|
static __inline__ void del_from_prot_sklist(struct sock *sk)
|
| 468 |
|
|
{
|
| 469 |
|
|
SOCKHASH_LOCK();
|
| 470 |
|
|
if(sk->sklist_next) {
|
| 471 |
|
|
sk->sklist_next->sklist_prev = sk->sklist_prev;
|
| 472 |
|
|
sk->sklist_prev->sklist_next = sk->sklist_next;
|
| 473 |
|
|
sk->sklist_next = NULL;
|
| 474 |
|
|
sk->prot->inuse--;
|
| 475 |
|
|
}
|
| 476 |
|
|
SOCKHASH_UNLOCK();
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
/*
|
| 480 |
|
|
* Used by processes to "lock" a socket state, so that
|
| 481 |
|
|
* interrupts and bottom half handlers won't change it
|
| 482 |
|
|
* from under us. It essentially blocks any incoming
|
| 483 |
|
|
* packets, so that we won't get any new data or any
|
| 484 |
|
|
* packets that change the state of the socket.
|
| 485 |
|
|
*
|
| 486 |
|
|
* Note the 'barrier()' calls: gcc may not move a lock
|
| 487 |
|
|
* "downwards" or a unlock "upwards" when optimizing.
|
| 488 |
|
|
*/
|
| 489 |
|
|
extern void __release_sock(struct sock *sk);
|
| 490 |
|
|
|
| 491 |
|
|
static inline void lock_sock(struct sock *sk)
|
| 492 |
|
|
{
|
| 493 |
|
|
#if 0
|
| 494 |
|
|
/* debugging code: the test isn't even 100% correct, but it can catch bugs */
|
| 495 |
|
|
/* Note that a double lock is ok in theory - it's just _usually_ a bug */
|
| 496 |
|
|
if (sk->users) {
|
| 497 |
|
|
__label__ here;
|
| 498 |
|
|
printk("double lock on socket at %p\n", &&here);
|
| 499 |
|
|
here:
|
| 500 |
|
|
}
|
| 501 |
|
|
#endif
|
| 502 |
|
|
sk->users++;
|
| 503 |
|
|
barrier();
|
| 504 |
|
|
}
|
| 505 |
|
|
|
| 506 |
|
|
static inline void release_sock(struct sock *sk)
|
| 507 |
|
|
{
|
| 508 |
|
|
barrier();
|
| 509 |
|
|
#if 0
|
| 510 |
|
|
/* debugging code: remove me when ok */
|
| 511 |
|
|
if (sk->users == 0) {
|
| 512 |
|
|
__label__ here;
|
| 513 |
|
|
sk->users = 1;
|
| 514 |
|
|
printk("trying to unlock unlocked socket at %p\n", &&here);
|
| 515 |
|
|
here:
|
| 516 |
|
|
}
|
| 517 |
|
|
#endif
|
| 518 |
|
|
if ((sk->users = sk->users-1) == 0)
|
| 519 |
|
|
__release_sock(sk);
|
| 520 |
|
|
}
|
| 521 |
|
|
|
| 522 |
|
|
|
| 523 |
|
|
extern struct sock * sk_alloc(int priority);
|
| 524 |
|
|
extern void sk_free(struct sock *sk);
|
| 525 |
|
|
extern void destroy_sock(struct sock *sk);
|
| 526 |
|
|
|
| 527 |
|
|
extern struct sk_buff *sock_wmalloc(struct sock *sk,
|
| 528 |
|
|
unsigned long size, int force,
|
| 529 |
|
|
int priority);
|
| 530 |
|
|
extern struct sk_buff *sock_rmalloc(struct sock *sk,
|
| 531 |
|
|
unsigned long size, int force,
|
| 532 |
|
|
int priority);
|
| 533 |
|
|
extern void sock_wfree(struct sock *sk,
|
| 534 |
|
|
struct sk_buff *skb);
|
| 535 |
|
|
extern void sock_rfree(struct sock *sk,
|
| 536 |
|
|
struct sk_buff *skb);
|
| 537 |
|
|
extern unsigned long sock_rspace(struct sock *sk);
|
| 538 |
|
|
extern unsigned long sock_wspace(struct sock *sk);
|
| 539 |
|
|
|
| 540 |
|
|
extern int sock_setsockopt(struct sock *sk, int level,
|
| 541 |
|
|
int op, char *optval,
|
| 542 |
|
|
int optlen);
|
| 543 |
|
|
|
| 544 |
|
|
extern int sock_getsockopt(struct sock *sk, int level,
|
| 545 |
|
|
int op, char *optval,
|
| 546 |
|
|
int *optlen);
|
| 547 |
|
|
extern struct sk_buff *sock_alloc_send_skb(struct sock *skb,
|
| 548 |
|
|
unsigned long size,
|
| 549 |
|
|
unsigned long fallback,
|
| 550 |
|
|
int noblock,
|
| 551 |
|
|
int *errcode);
|
| 552 |
|
|
|
| 553 |
|
|
/*
|
| 554 |
|
|
* Queue a received datagram if it will fit. Stream and sequenced
|
| 555 |
|
|
* protocols can't normally use this as they need to fit buffers in
|
| 556 |
|
|
* and play with them.
|
| 557 |
|
|
*
|
| 558 |
|
|
* Inlined as it's very short and called for pretty much every
|
| 559 |
|
|
* packet ever received.
|
| 560 |
|
|
*/
|
| 561 |
|
|
|
| 562 |
|
|
extern __inline__ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
|
| 563 |
|
|
{
|
| 564 |
|
|
if (sk->rmem_alloc + skb->truesize >= sk->rcvbuf)
|
| 565 |
|
|
return -ENOMEM;
|
| 566 |
|
|
atomic_add(skb->truesize, &sk->rmem_alloc);
|
| 567 |
|
|
skb->sk=sk;
|
| 568 |
|
|
skb_queue_tail(&sk->receive_queue,skb);
|
| 569 |
|
|
if (!sk->dead)
|
| 570 |
|
|
sk->data_ready(sk,skb->len);
|
| 571 |
|
|
return 0;
|
| 572 |
|
|
}
|
| 573 |
|
|
|
| 574 |
|
|
extern __inline__ int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
|
| 575 |
|
|
{
|
| 576 |
|
|
if (sk->rmem_alloc + skb->truesize >= sk->rcvbuf)
|
| 577 |
|
|
return -ENOMEM;
|
| 578 |
|
|
atomic_add(skb->truesize, &sk->rmem_alloc);
|
| 579 |
|
|
skb->sk=sk;
|
| 580 |
|
|
__skb_queue_tail(&sk->receive_queue,skb);
|
| 581 |
|
|
if (!sk->dead)
|
| 582 |
|
|
sk->data_ready(sk,skb->len);
|
| 583 |
|
|
return 0;
|
| 584 |
|
|
}
|
| 585 |
|
|
|
| 586 |
|
|
/*
|
| 587 |
|
|
* Recover an error report and clear atomically
|
| 588 |
|
|
*/
|
| 589 |
|
|
|
| 590 |
|
|
extern __inline__ int sock_error(struct sock *sk)
|
| 591 |
|
|
{
|
| 592 |
|
|
int err=xchg(&sk->err,0);
|
| 593 |
|
|
return -err;
|
| 594 |
|
|
}
|
| 595 |
|
|
|
| 596 |
|
|
/*
|
| 597 |
|
|
* Declarations from timer.c
|
| 598 |
|
|
*/
|
| 599 |
|
|
|
| 600 |
|
|
extern struct sock *timer_base;
|
| 601 |
|
|
|
| 602 |
|
|
extern void delete_timer (struct sock *);
|
| 603 |
|
|
extern void reset_timer (struct sock *, int, unsigned long);
|
| 604 |
|
|
extern void net_timer (unsigned long);
|
| 605 |
|
|
|
| 606 |
|
|
|
| 607 |
|
|
/*
|
| 608 |
|
|
* Enable debug/info messages
|
| 609 |
|
|
*/
|
| 610 |
|
|
|
| 611 |
|
|
#define NETDEBUG(x) do { } while (0)
|
| 612 |
|
|
|
| 613 |
|
|
#endif /* _SOCK_H */
|
