/*
* 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.
*
* PF_INET protocol family socket handler.
*
* Version: $Id: af_inet.c,v 1.127 2000/12/22 19:51:50 davem Exp $
*
* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Florian La Roche, <flla@stud.uni-sb.de>
* Alan Cox, <A.Cox@swansea.ac.uk>
*
* Changes (see also sock.c)
*
* A.N.Kuznetsov : Socket death error in accept().
* John Richardson : Fix non blocking error in connect()
* so sockets that fail to connect
* don't return -EINPROGRESS.
* Alan Cox : Asynchronous I/O support
* Alan Cox : Keep correct socket pointer on sock structures
* when accept() ed
* Alan Cox : Semantics of SO_LINGER aren't state moved
* to close when you look carefully. With
* this fixed and the accept bug fixed
* some RPC stuff seems happier.
* Niibe Yutaka : 4.4BSD style write async I/O
* Alan Cox,
* Tony Gale : Fixed reuse semantics.
* Alan Cox : bind() shouldn't abort existing but dead
* sockets. Stops FTP netin:.. I hope.
* Alan Cox : bind() works correctly for RAW sockets. Note
* that FreeBSD at least was broken in this respect
* so be careful with compatibility tests...
* Alan Cox : routing cache support
* Alan Cox : memzero the socket structure for compactness.
* Matt Day : nonblock connect error handler
* Alan Cox : Allow large numbers of pending sockets
* (eg for big web sites), but only if
* specifically application requested.
* Alan Cox : New buffering throughout IP. Used dumbly.
* Alan Cox : New buffering now used smartly.
* Alan Cox : BSD rather than common sense interpretation of
* listen.
* Germano Caronni : Assorted small races.
* Alan Cox : sendmsg/recvmsg basic support.
* Alan Cox : Only sendmsg/recvmsg now supported.
* Alan Cox : Locked down bind (see security list).
* Alan Cox : Loosened bind a little.
* Mike McLagan : ADD/DEL DLCI Ioctls
* Willy Konynenberg : Transparent proxying support.
* David S. Miller : New socket lookup architecture.
* Some other random speedups.
* Cyrus Durgin : Cleaned up file for kmod hacks.
* Andi Kleen : Fix inet_stream_connect TCP race.
*
* 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.
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/netfilter_ipv4.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/smp_lock.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <net/ip.h>
#include <net/protocol.h>
#include <net/arp.h>
#include <net/route.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/raw.h>
#include <net/icmp.h>
#include <net/ipip.h>
#include <net/inet_common.h>
#ifdef CONFIG_IP_MROUTE
#include <linux/mroute.h>
#endif
#include <linux/if_bridge.h>
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
#ifdef CONFIG_NET_DIVERT
#include <linux/divert.h>
#endif /* CONFIG_NET_DIVERT */
#if defined(CONFIG_NET_RADIO) || defined(CONFIG_NET_PCMCIA_RADIO)
#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
#endif /* CONFIG_NET_RADIO || CONFIG_NET_PCMCIA_RADIO */
#define min(a,b) ((a)<(b)?(a):(b))
struct linux_mib net_statistics[NR_CPUS*2];
#ifdef INET_REFCNT_DEBUG
atomic_t inet_sock_nr;
#endif
extern int raw_get_info(char *, char **, off_t, int);
extern int snmp_get_info(char *, char **, off_t, int);
extern int netstat_get_info(char *, char **, off_t, int);
extern int afinet_get_info(char *, char **, off_t, int);
extern int tcp_get_info(char *, char **, off_t, int);
extern int udp_get_info(char *, char **, off_t, int);
extern void ip_mc_drop_socket(struct sock *sk);
#ifdef CONFIG_DLCI
extern int dlci_ioctl(unsigned int, void*);
#endif
#ifdef CONFIG_DLCI_MODULE
int (*dlci_ioctl_hook)(unsigned int, void *) = NULL;
#endif
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
int (*br_ioctl_hook)(unsigned long) = NULL;
#endif
/* New destruction routine */
147 void inet_sock_destruct(struct sock *sk)
{
__skb_queue_purge(&sk->receive_queue);
__skb_queue_purge(&sk->error_queue);
152 if (sk->type == SOCK_STREAM && sk->state != TCP_CLOSE) {
printk("Attempt to release TCP socket in state %d %p\n",
sk->state,
sk);
156 return;
}
158 if (!sk->dead) {
printk("Attempt to release alive inet socket %p\n", sk);
160 return;
}
163 BUG_TRAP(atomic_read(&sk->rmem_alloc) == 0);
164 BUG_TRAP(atomic_read(&sk->wmem_alloc) == 0);
165 BUG_TRAP(sk->wmem_queued == 0);
166 BUG_TRAP(sk->forward_alloc == 0);
168 if (sk->protinfo.af_inet.opt)
kfree(sk->protinfo.af_inet.opt);
dst_release(sk->dst_cache);
#ifdef INET_REFCNT_DEBUG
atomic_dec(&inet_sock_nr);
printk(KERN_DEBUG "INET socket %p released, %d are still alive\n", sk, atomic_read(&inet_sock_nr));
#endif
}
177 void inet_sock_release(struct sock *sk)
{
179 if (sk->prot->destroy)
sk->prot->destroy(sk);
/* Observation: when inet_sock_release is called, processes have
* no access to socket. But net still has.
* Step one, detach it from networking:
*
* A. Remove from hash tables.
*/
sk->prot->unhash(sk);
/* In this point socket cannot receive new packets,
* but it is possible that some packets are in flight
* because some CPU runs receiver and did hash table lookup
* before we unhashed socket. They will achieve receive queue
* and will be purged by socket destructor.
*
* Also we still have packets pending on receive
* queue and probably, our own packets waiting in device queues.
* sock_destroy will drain receive queue, but transmitted
* packets will delay socket destruction until the last reference
* will be released.
*/
sock_orphan(sk);
#ifdef INET_REFCNT_DEBUG
if (atomic_read(&sk->refcnt) != 1) {
printk(KERN_DEBUG "Destruction inet %p delayed, c=%d\n", sk, atomic_read(&sk->refcnt));
}
#endif
sock_put(sk);
}
/*
* The routines beyond this point handle the behaviour of an AF_INET
* socket object. Mostly it punts to the subprotocols of IP to do
* the work.
*/
/*
* Set socket options on an inet socket.
*/
226 int inet_setsockopt(struct socket *sock, int level, int optname,
char *optval, int optlen)
{
struct sock *sk=sock->sk;
231 return sk->prot->setsockopt(sk,level,optname,optval,optlen);
}
/*
* Get a socket option on an AF_INET socket.
*
* FIX: POSIX 1003.1g is very ambiguous here. It states that
* asynchronous errors should be reported by getsockopt. We assume
* this means if you specify SO_ERROR (otherwise whats the point of it).
*/
242 int inet_getsockopt(struct socket *sock, int level, int optname,
char *optval, int *optlen)
{
struct sock *sk=sock->sk;
247 return sk->prot->getsockopt(sk,level,optname,optval,optlen);
}
/*
* Automatically bind an unbound socket.
*/
254 static int inet_autobind(struct sock *sk)
{
/* We may need to bind the socket. */
257 lock_sock(sk);
258 if (sk->num == 0) {
259 if (sk->prot->get_port(sk, 0) != 0) {
260 release_sock(sk);
261 return -EAGAIN;
}
sk->sport = htons(sk->num);
}
265 release_sock(sk);
266 return 0;
}
/*
* Move a socket into listening state.
*/
273 int inet_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
unsigned char old_state;
int err;
279 lock_sock(sk);
err = -EINVAL;
282 if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM)
283 goto out;
old_state = sk->state;
286 if (!((1<<old_state)&(TCPF_CLOSE|TCPF_LISTEN)))
287 goto out;
/* Really, if the socket is already in listen state
* we can only allow the backlog to be adjusted.
*/
292 if (old_state != TCP_LISTEN) {
err = tcp_listen_start(sk);
294 if (err)
295 goto out;
}
sk->max_ack_backlog = backlog;
err = 0;
out:
301 release_sock(sk);
302 return err;
}
/*
* Create an inet socket.
*/
309 static int inet_create(struct socket *sock, int protocol)
{
struct sock *sk;
struct proto *prot;
sock->state = SS_UNCONNECTED;
sk = sk_alloc(PF_INET, GFP_KERNEL, 1);
316 if (sk == NULL)
317 goto do_oom;
319 switch (sock->type) {
320 case SOCK_STREAM:
321 if (protocol && protocol != IPPROTO_TCP)
322 goto free_and_noproto;
protocol = IPPROTO_TCP;
prot = &tcp_prot;
sock->ops = &inet_stream_ops;
326 break;
327 case SOCK_SEQPACKET:
328 goto free_and_badtype;
329 case SOCK_DGRAM:
330 if (protocol && protocol != IPPROTO_UDP)
331 goto free_and_noproto;
protocol = IPPROTO_UDP;
sk->no_check = UDP_CSUM_DEFAULT;
prot=&udp_prot;
sock->ops = &inet_dgram_ops;
336 break;
337 case SOCK_RAW:
338 if (!capable(CAP_NET_RAW))
339 goto free_and_badperm;
340 if (!protocol)
341 goto free_and_noproto;
prot = &raw_prot;
sk->reuse = 1;
sk->num = protocol;
sock->ops = &inet_dgram_ops;
346 if (protocol == IPPROTO_RAW)
sk->protinfo.af_inet.hdrincl = 1;
348 break;
349 default:
350 goto free_and_badtype;
}
353 if (ipv4_config.no_pmtu_disc)
sk->protinfo.af_inet.pmtudisc = IP_PMTUDISC_DONT;
355 else
sk->protinfo.af_inet.pmtudisc = IP_PMTUDISC_WANT;
sock_init_data(sock,sk);
sk->destruct = inet_sock_destruct;
sk->zapped = 0;
sk->family = PF_INET;
sk->protocol = protocol;
sk->prot = prot;
sk->backlog_rcv = prot->backlog_rcv;
sk->protinfo.af_inet.ttl=sysctl_ip_default_ttl;
sk->protinfo.af_inet.mc_loop=1;
sk->protinfo.af_inet.mc_ttl=1;
sk->protinfo.af_inet.mc_index=0;
sk->protinfo.af_inet.mc_list=NULL;
#ifdef INET_REFCNT_DEBUG
atomic_inc(&inet_sock_nr);
#endif
380 if (sk->num) {
/* It assumes that any protocol which allows
* the user to assign a number at socket
* creation time automatically
* shares.
*/
sk->sport = htons(sk->num);
/* Add to protocol hash chains. */
sk->prot->hash(sk);
}
392 if (sk->prot->init) {
int err = sk->prot->init(sk);
394 if (err != 0) {
inet_sock_release(sk);
396 return(err);
}
}
399 return(0);
free_and_badtype:
sk_free(sk);
403 return -ESOCKTNOSUPPORT;
free_and_badperm:
sk_free(sk);
407 return -EPERM;
free_and_noproto:
sk_free(sk);
411 return -EPROTONOSUPPORT;
do_oom:
414 return -ENOBUFS;
}
/*
* The peer socket should always be NULL (or else). When we call this
* function we are destroying the object and from then on nobody
* should refer to it.
*/
424 int inet_release(struct socket *sock)
{
struct sock *sk = sock->sk;
428 if (sk) {
long timeout;
/* Applications forget to leave groups before exiting */
ip_mc_drop_socket(sk);
/* If linger is set, we don't return until the close
* is complete. Otherwise we return immediately. The
* actually closing is done the same either way.
*
* If the close is due to the process exiting, we never
* linger..
*/
timeout = 0;
442 if (sk->linger && !(current->flags & PF_EXITING))
timeout = sk->lingertime;
sock->sk = NULL;
sk->prot->close(sk, timeout);
}
447 return(0);
}
/* It is off by default, see below. */
int sysctl_ip_nonlocal_bind;
453 static int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
struct sockaddr_in *addr=(struct sockaddr_in *)uaddr;
struct sock *sk=sock->sk;
unsigned short snum;
int chk_addr_ret;
int err;
/* If the socket has its own bind function then use it. (RAW) */
462 if(sk->prot->bind)
463 return sk->prot->bind(sk, uaddr, addr_len);
465 if (addr_len < sizeof(struct sockaddr_in))
466 return -EINVAL;
chk_addr_ret = inet_addr_type(addr->sin_addr.s_addr);
/* Not specified by any standard per-se, however it breaks too
* many applications when removed. It is unfortunate since
* allowing applications to make a non-local bind solves
* several problems with systems using dynamic addressing.
* (ie. your servers still start up even if your ISDN link
* is temporarily down)
*/
if (sysctl_ip_nonlocal_bind == 0 &&
sk->protinfo.af_inet.freebind == 0 &&
addr->sin_addr.s_addr != INADDR_ANY &&
chk_addr_ret != RTN_LOCAL &&
chk_addr_ret != RTN_MULTICAST &&
482 chk_addr_ret != RTN_BROADCAST)
483 return -EADDRNOTAVAIL;
snum = ntohs(addr->sin_port);
486 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
487 return -EACCES;
/* We keep a pair of addresses. rcv_saddr is the one
* used by hash lookups, and saddr is used for transmit.
*
* In the BSD API these are the same except where it
* would be illegal to use them (multicast/broadcast) in
* which case the sending device address is used.
*/
496 lock_sock(sk);
/* Check these errors (active socket, double bind). */
err = -EINVAL;
if ((sk->state != TCP_CLOSE) ||
501 (sk->num != 0))
502 goto out;
sk->rcv_saddr = sk->saddr = addr->sin_addr.s_addr;
505 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
sk->saddr = 0; /* Use device */
/* Make sure we are allowed to bind here. */
509 if (sk->prot->get_port(sk, snum) != 0) {
sk->saddr = sk->rcv_saddr = 0;
err = -EADDRINUSE;
512 goto out;
}
515 if (sk->rcv_saddr)
sk->userlocks |= SOCK_BINDADDR_LOCK;
517 if (snum)
sk->userlocks |= SOCK_BINDPORT_LOCK;
sk->sport = htons(sk->num);
sk->daddr = 0;
sk->dport = 0;
sk_dst_reset(sk);
err = 0;
out:
525 release_sock(sk);
526 return err;
}
529 int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr,
int addr_len, int flags)
{
struct sock *sk=sock->sk;
534 if (uaddr->sa_family == AF_UNSPEC)
535 return sk->prot->disconnect(sk, flags);
537 if (sk->num==0 && inet_autobind(sk) != 0)
538 return -EAGAIN;
539 return sk->prot->connect(sk, (struct sockaddr *)uaddr, addr_len);
}
542 static long inet_wait_for_connect(struct sock *sk, long timeo)
{
DECLARE_WAITQUEUE(wait, current);
546 __set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(sk->sleep, &wait);
/* Basic assumption: if someone sets sk->err, he _must_
* change state of the socket from TCP_SYN_*.
* Connect() does not allow to get error notifications
* without closing the socket.
*/
554 while ((1<<sk->state)&(TCPF_SYN_SENT|TCPF_SYN_RECV)) {
555 release_sock(sk);
timeo = schedule_timeout(timeo);
557 lock_sock(sk);
558 if (signal_pending(current) || !timeo)
559 break;
560 set_current_state(TASK_INTERRUPTIBLE);
}
562 __set_current_state(TASK_RUNNING);
remove_wait_queue(sk->sleep, &wait);
564 return timeo;
}
/*
* Connect to a remote host. There is regrettably still a little
* TCP 'magic' in here.
*/
572 int inet_stream_connect(struct socket *sock, struct sockaddr * uaddr,
int addr_len, int flags)
{
struct sock *sk=sock->sk;
int err;
long timeo;
579 lock_sock(sk);
581 if (uaddr->sa_family == AF_UNSPEC) {
err = sk->prot->disconnect(sk, flags);
sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
584 goto out;
}
587 switch (sock->state) {
588 default:
err = -EINVAL;
590 goto out;
591 case SS_CONNECTED:
err = -EISCONN;
593 goto out;
594 case SS_CONNECTING:
err = -EALREADY;
/* Fall out of switch with err, set for this state */
597 break;
598 case SS_UNCONNECTED:
err = -EISCONN;
600 if (sk->state != TCP_CLOSE)
601 goto out;
err = -EAGAIN;
604 if (sk->num == 0) {
605 if (sk->prot->get_port(sk, 0) != 0)
606 goto out;
sk->sport = htons(sk->num);
}
err = sk->prot->connect(sk, uaddr, addr_len);
611 if (err < 0)
612 goto out;
sock->state = SS_CONNECTING;
/* Just entered SS_CONNECTING state; the only
* difference is that return value in non-blocking
* case is EINPROGRESS, rather than EALREADY.
*/
err = -EINPROGRESS;
621 break;
}
timeo = sock_sndtimeo(sk, flags&O_NONBLOCK);
626 if ((1<<sk->state)&(TCPF_SYN_SENT|TCPF_SYN_RECV)) {
/* Error code is set above */
628 if (!timeo || !inet_wait_for_connect(sk, timeo))
629 goto out;
err = sock_intr_errno(timeo);
632 if (signal_pending(current))
633 goto out;
}
/* Connection was closed by RST, timeout, ICMP error
* or another process disconnected us.
*/
639 if (sk->state == TCP_CLOSE)
640 goto sock_error;
/* sk->err may be not zero now, if RECVERR was ordered by user
* and error was received after socket entered established state.
* Hence, it is handled normally after connect() return successfully.
*/
sock->state = SS_CONNECTED;
err = 0;
out:
650 release_sock(sk);
651 return err;
sock_error:
err = sock_error(sk) ? : -ECONNABORTED;
sock->state = SS_UNCONNECTED;
656 if (sk->prot->disconnect(sk, flags))
sock->state = SS_DISCONNECTING;
658 goto out;
}
/*
* Accept a pending connection. The TCP layer now gives BSD semantics.
*/
665 int inet_accept(struct socket *sock, struct socket *newsock, int flags)
{
struct sock *sk1 = sock->sk;
struct sock *sk2;
int err = -EINVAL;
671 if((sk2 = sk1->prot->accept(sk1,flags,&err)) == NULL)
672 goto do_err;
674 lock_sock(sk2);
676 BUG_TRAP((1<<sk2->state)&(TCPF_ESTABLISHED|TCPF_CLOSE_WAIT|TCPF_CLOSE));
sock_graft(sk2, newsock);
newsock->state = SS_CONNECTED;
681 release_sock(sk2);
682 return 0;
do_err:
685 return err;
}
/*
* This does both peername and sockname.
*/
693 static int inet_getname(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
struct sock *sk = sock->sk;
struct sockaddr_in *sin = (struct sockaddr_in *)uaddr;
sin->sin_family = AF_INET;
700 if (peer) {
701 if (!sk->dport)
702 return -ENOTCONN;
703 if (((1<<sk->state)&(TCPF_CLOSE|TCPF_SYN_SENT)) && peer == 1)
704 return -ENOTCONN;
sin->sin_port = sk->dport;
sin->sin_addr.s_addr = sk->daddr;
707 } else {
__u32 addr = sk->rcv_saddr;
709 if (!addr)
addr = sk->saddr;
sin->sin_port = sk->sport;
sin->sin_addr.s_addr = addr;
}
*uaddr_len = sizeof(*sin);
715 return(0);
}
720 int inet_recvmsg(struct socket *sock, struct msghdr *msg, int size,
int flags, struct scm_cookie *scm)
{
struct sock *sk = sock->sk;
int addr_len = 0;
int err;
err = sk->prot->recvmsg(sk, msg, size, flags&MSG_DONTWAIT,
flags&~MSG_DONTWAIT, &addr_len);
729 if (err >= 0)
msg->msg_namelen = addr_len;
731 return err;
}
735 int inet_sendmsg(struct socket *sock, struct msghdr *msg, int size,
struct scm_cookie *scm)
{
struct sock *sk = sock->sk;
/* We may need to bind the socket. */
741 if (sk->num==0 && inet_autobind(sk) != 0)
742 return -EAGAIN;
744 return sk->prot->sendmsg(sk, msg, size);
}
747 int inet_shutdown(struct socket *sock, int how)
{
struct sock *sk = sock->sk;
int err = 0;
/* This should really check to make sure
* the socket is a TCP socket. (WHY AC...)
*/
how++; /* maps 0->1 has the advantage of making bit 1 rcvs and
1->2 bit 2 snds.
2->3 */
758 if ((how & ~SHUTDOWN_MASK) || how==0) /* MAXINT->0 */
759 return -EINVAL;
761 lock_sock(sk);
762 if (sock->state == SS_CONNECTING) {
763 if ((1<<sk->state)&(TCPF_SYN_SENT|TCPF_SYN_RECV|TCPF_CLOSE))
sock->state = SS_DISCONNECTING;
765 else
sock->state = SS_CONNECTED;
}
769 switch (sk->state) {
770 case TCP_CLOSE:
err = -ENOTCONN;
/* Hack to wake up other listeners, who can poll for
POLLHUP, even on eg. unconnected UDP sockets -- RR */
774 default:
sk->shutdown |= how;
776 if (sk->prot->shutdown)
sk->prot->shutdown(sk, how);
778 break;
/* Remaining two branches are temporary solution for missing
* close() in multithreaded environment. It is _not_ a good idea,
* but we have no choice until close() is repaired at VFS level.
*/
784 case TCP_LISTEN:
785 if (!(how & RCV_SHUTDOWN))
786 break;
/* Fall through */
788 case TCP_SYN_SENT:
err = sk->prot->disconnect(sk, O_NONBLOCK);
sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
791 break;
}
/* Wake up anyone sleeping in poll. */
sk->state_change(sk);
796 release_sock(sk);
797 return err;
}
/*
* ioctl() calls you can issue on an INET socket. Most of these are
* device configuration and stuff and very rarely used. Some ioctls
* pass on to the socket itself.
*
* NOTE: I like the idea of a module for the config stuff. ie ifconfig
* loads the devconfigure module does its configuring and unloads it.
* There's a good 20K of config code hanging around the kernel.
*/
810 static int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
int err;
int pid;
816 switch(cmd)
{
818 case FIOSETOWN:
819 case SIOCSPGRP:
err = get_user(pid, (int *) arg);
821 if (err)
822 return err;
if (current->pid != pid && current->pgrp != -pid &&
824 !capable(CAP_NET_ADMIN))
825 return -EPERM;
sk->proc = pid;
827 return(0);
828 case FIOGETOWN:
829 case SIOCGPGRP:
830 return put_user(sk->proc, (int *)arg);
831 case SIOCGSTAMP:
832 if(sk->stamp.tv_sec==0)
833 return -ENOENT;
err = copy_to_user((void *)arg,&sk->stamp,sizeof(struct timeval));
835 if (err)
err = -EFAULT;
837 return err;
838 case SIOCADDRT:
839 case SIOCDELRT:
840 case SIOCRTMSG:
841 return(ip_rt_ioctl(cmd,(void *) arg));
842 case SIOCDARP:
843 case SIOCGARP:
844 case SIOCSARP:
845 return(arp_ioctl(cmd,(void *) arg));
846 case SIOCGIFADDR:
847 case SIOCSIFADDR:
848 case SIOCGIFBRDADDR:
849 case SIOCSIFBRDADDR:
850 case SIOCGIFNETMASK:
851 case SIOCSIFNETMASK:
852 case SIOCGIFDSTADDR:
853 case SIOCSIFDSTADDR:
854 case SIOCSIFPFLAGS:
855 case SIOCGIFPFLAGS:
856 case SIOCSIFFLAGS:
857 return(devinet_ioctl(cmd,(void *) arg));
858 case SIOCGIFBR:
859 case SIOCSIFBR:
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
#ifdef CONFIG_KMOD
if (br_ioctl_hook == NULL)
request_module("bridge");
#endif
if (br_ioctl_hook != NULL)
return br_ioctl_hook(arg);
#endif
868 case SIOCGIFDIVERT:
869 case SIOCSIFDIVERT:
#ifdef CONFIG_NET_DIVERT
return(divert_ioctl(cmd, (struct divert_cf *) arg));
#else
873 return -ENOPKG;
#endif /* CONFIG_NET_DIVERT */
875 return -ENOPKG;
877 case SIOCADDDLCI:
878 case SIOCDELDLCI:
#ifdef CONFIG_DLCI
lock_kernel();
err = dlci_ioctl(cmd, (void *) arg);
unlock_kernel();
return err;
#endif
#ifdef CONFIG_DLCI_MODULE
#ifdef CONFIG_KMOD
if (dlci_ioctl_hook == NULL)
request_module("dlci");
#endif
if (dlci_ioctl_hook) {
lock_kernel();
err = (*dlci_ioctl_hook)(cmd, (void *) arg);
unlock_kernel();
return err;
}
#endif
900 return -ENOPKG;
902 default:
if ((cmd >= SIOCDEVPRIVATE) &&
904 (cmd <= (SIOCDEVPRIVATE + 15)))
905 return(dev_ioctl(cmd,(void *) arg));
#ifdef WIRELESS_EXT
if((cmd >= SIOCIWFIRST) && (cmd <= SIOCIWLAST))
return(dev_ioctl(cmd,(void *) arg));
#endif /* WIRELESS_EXT */
912 if (sk->prot->ioctl==NULL || (err=sk->prot->ioctl(sk, cmd, arg))==-ENOIOCTLCMD)
913 return(dev_ioctl(cmd,(void *) arg));
914 return err;
}
/*NOTREACHED*/
917 return(0);
}
struct proto_ops inet_stream_ops = {
family: PF_INET,
release: inet_release,
bind: inet_bind,
connect: inet_stream_connect,
socketpair: sock_no_socketpair,
accept: inet_accept,
getname: inet_getname,
poll: tcp_poll,
ioctl: inet_ioctl,
listen: inet_listen,
shutdown: inet_shutdown,
setsockopt: inet_setsockopt,
getsockopt: inet_getsockopt,
sendmsg: inet_sendmsg,
recvmsg: inet_recvmsg,
mmap: sock_no_mmap
};
struct proto_ops inet_dgram_ops = {
family: PF_INET,
release: inet_release,
bind: inet_bind,
connect: inet_dgram_connect,
socketpair: sock_no_socketpair,
accept: sock_no_accept,
getname: inet_getname,
poll: datagram_poll,
ioctl: inet_ioctl,
listen: sock_no_listen,
shutdown: inet_shutdown,
setsockopt: inet_setsockopt,
getsockopt: inet_getsockopt,
sendmsg: inet_sendmsg,
recvmsg: inet_recvmsg,
mmap: sock_no_mmap,
};
struct net_proto_family inet_family_ops = {
PF_INET,
inet_create
};
extern void tcp_init(void);
extern void tcp_v4_init(struct net_proto_family *);
/*
* Called by socket.c on kernel startup.
*/
974 static int __init inet_init(void)
{
struct sk_buff *dummy_skb;
struct inet_protocol *p;
printk(KERN_INFO "NET4: Linux TCP/IP 1.0 for NET4.0\n");
981 if (sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb))
{
printk(KERN_CRIT "inet_proto_init: panic\n");
984 return -EINVAL;
}
/*
* Tell SOCKET that we are alive...
*/
(void) sock_register(&inet_family_ops);
/*
* Add all the protocols.
*/
printk(KERN_INFO "IP Protocols: ");
998 for(p = inet_protocol_base; p != NULL;)
{
struct inet_protocol *tmp = (struct inet_protocol *) p->next;
inet_add_protocol(p);
printk("%s%s",p->name,tmp?", ":"\n");
p = tmp;
}
/*
* Set the ARP module up
*/
arp_init();
/*
* Set the IP module up
*/
ip_init();
tcp_v4_init(&inet_family_ops);
/* Setup TCP slab cache for open requests. */
tcp_init();
/*
* Set the ICMP layer up
*/
icmp_init(&inet_family_ops);
/* I wish inet_add_protocol had no constructor hook...
I had to move IPIP from net/ipv4/protocol.c :-( --ANK
*/
#ifdef CONFIG_NET_IPIP
ipip_init();
#endif
#ifdef CONFIG_NET_IPGRE
ipgre_init();
#endif
/*
* Initialise the multicast router
*/
#if defined(CONFIG_IP_MROUTE)
ip_mr_init();
#endif
/*
* Create all the /proc entries.
*/
#ifdef CONFIG_PROC_FS
proc_net_create ("raw", 0, raw_get_info);
proc_net_create ("netstat", 0, netstat_get_info);
proc_net_create ("snmp", 0, snmp_get_info);
proc_net_create ("sockstat", 0, afinet_get_info);
proc_net_create ("tcp", 0, tcp_get_info);
proc_net_create ("udp", 0, udp_get_info);
#endif /* CONFIG_PROC_FS */
1058 return 0;
}
module_init(inet_init);