2 * af_llc.c - LLC User Interface SAPs
4 * Functions in this module are implementation of socket based llc
5 * communications for the Linux operating system. Support of llc class
6 * one and class two is provided via SOCK_DGRAM and SOCK_STREAM
9 * An llc2 connection is (mac + sap), only one llc2 sap connection
10 * is allowed per mac. Though one sap may have multiple mac + sap
13 * Copyright (c) 2001 by Jay Schulist <jschlst@samba.org>
14 * 2002-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
16 * This program can be redistributed or modified under the terms of the
17 * GNU General Public License as published by the Free Software Foundation.
18 * This program is distributed without any warranty or implied warranty
19 * of merchantability or fitness for a particular purpose.
21 * See the GNU General Public License for more details.
23 #include <linux/config.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/tcp.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/init.h>
30 #include <net/llc_sap.h>
31 #include <net/llc_pdu.h>
32 #include <net/llc_conn.h>
34 /* remember: uninitialized global data is zeroed because its in .bss */
35 static u16 llc_ui_sap_last_autoport = LLC_SAP_DYN_START;
36 static u16 llc_ui_sap_link_no_max[256];
37 static struct sockaddr_llc llc_ui_addrnull;
38 static struct proto_ops llc_ui_ops;
40 static int llc_ui_wait_for_conn(struct sock *sk, int timeout);
41 static int llc_ui_wait_for_disc(struct sock *sk, int timeout);
42 static int llc_ui_wait_for_data(struct sock *sk, int timeout);
43 static int llc_ui_wait_for_busy_core(struct sock *sk, int timeout);
46 #define dprintk(args...) printk(KERN_DEBUG args)
48 #define dprintk(args...)
52 * llc_ui_next_link_no - return the next unused link number for a sap
53 * @sap: Address of sap to get link number from.
55 * Return the next unused link number for a given sap.
57 static __inline__ u16 llc_ui_next_link_no(int sap)
59 return llc_ui_sap_link_no_max[sap]++;
63 * llc_proto_type - return eth protocol for ARP header type
64 * @arphrd: ARP header type.
66 * Given an ARP header type return the corresponding ethernet protocol.
68 static __inline__ u16 llc_proto_type(u16 arphrd)
70 return arphrd == ARPHRD_IEEE802_TR ?
71 htons(ETH_P_TR_802_2) : htons(ETH_P_802_2);
75 * llc_ui_addr_null - determines if a address structure is null
76 * @addr: Address to test if null.
78 static __inline__ u8 llc_ui_addr_null(struct sockaddr_llc *addr)
80 return !memcmp(addr, &llc_ui_addrnull, sizeof(*addr));
84 * llc_ui_header_len - return length of llc header based on operation
85 * @sk: Socket which contains a valid llc socket type.
86 * @addr: Complete sockaddr_llc structure received from the user.
88 * Provide the length of the llc header depending on what kind of
89 * operation the user would like to perform and the type of socket.
90 * Returns the correct llc header length.
92 static __inline__ u8 llc_ui_header_len(struct sock *sk,
93 struct sockaddr_llc *addr)
95 u8 rc = LLC_PDU_LEN_U;
97 if (addr->sllc_test || addr->sllc_xid)
99 else if (sk->sk_type == SOCK_STREAM)
105 * llc_ui_send_data - send data via reliable llc2 connection
106 * @sk: Connection the socket is using.
107 * @skb: Data the user wishes to send.
108 * @addr: Source and destination fields provided by the user.
109 * @noblock: can we block waiting for data?
111 * Send data via reliable llc2 connection.
112 * Returns 0 upon success, non-zero if action did not succeed.
114 static int llc_ui_send_data(struct sock* sk, struct sk_buff *skb, int noblock)
116 struct llc_opt* llc = llc_sk(sk);
119 if (llc_data_accept_state(llc->state) || llc->p_flag) {
120 int timeout = sock_sndtimeo(sk, noblock);
122 rc = llc_ui_wait_for_busy_core(sk, timeout);
125 rc = llc_build_and_send_pkt(sk, skb);
129 static void llc_ui_sk_init(struct socket *sock, struct sock *sk)
131 sk->sk_type = sock->type;
132 sk->sk_sleep = &sock->wait;
133 sk->sk_socket = sock;
135 sock->ops = &llc_ui_ops;
139 * llc_ui_create - alloc and init a new llc_ui socket
140 * @sock: Socket to initialize and attach allocated sk to.
143 * Allocate and initialize a new llc_ui socket, validate the user wants a
144 * socket type we have available.
145 * Returns 0 upon success, negative upon failure.
147 static int llc_ui_create(struct socket *sock, int protocol)
150 int rc = -ESOCKTNOSUPPORT;
152 if (sock->type == SOCK_DGRAM || sock->type == SOCK_STREAM) {
154 sk = llc_sk_alloc(PF_LLC, GFP_KERNEL);
157 llc_ui_sk_init(sock, sk);
164 * llc_ui_release - shutdown socket
165 * @sock: Socket to release.
167 * Shutdown and deallocate an existing socket.
169 static int llc_ui_release(struct socket *sock)
171 struct sock *sk = sock->sk;
179 dprintk("%s: closing local(%02X) remote(%02X)\n", __FUNCTION__,
180 llc->laddr.lsap, llc->daddr.lsap);
181 if (!llc_send_disc(sk))
182 llc_ui_wait_for_disc(sk, sk->sk_rcvtimeo);
184 llc_sap_remove_socket(llc->sap, sk);
186 if (llc->sap && hlist_empty(&llc->sap->sk_list.list)) {
187 llc_release_sockets(llc->sap);
188 llc_sap_close(llc->sap);
199 * llc_ui_autoport - provide dynamically allocate SAP number
201 * Provide the caller with a dynamically allocated SAP number according
202 * to the rules that are set in this function. Returns: 0, upon failure,
203 * SAP number otherwise.
205 static int llc_ui_autoport(void)
210 while (tries < LLC_SAP_DYN_TRIES) {
211 for (i = llc_ui_sap_last_autoport;
212 i < LLC_SAP_DYN_STOP; i += 2) {
213 sap = llc_sap_find(i);
215 llc_ui_sap_last_autoport = i + 2;
219 llc_ui_sap_last_autoport = LLC_SAP_DYN_START;
228 * llc_ui_autobind - Bind a socket to a specific address.
229 * @sk: Socket to bind an address to.
230 * @addr: Address the user wants the socket bound to.
232 * Bind a socket to a specific address. For llc a user is able to bind to
233 * a specific sap only or mac + sap. If the user only specifies a sap and
234 * a null dmac (all zeros) the user is attempting to bind to an entire
235 * sap. This will stop anyone else on the local system from using that
236 * sap. If someone else has a mac + sap open the bind to null + sap will
238 * If the user desires to bind to a specific mac + sap, it is possible to
239 * have multiple sap connections via multiple macs.
240 * Bind and autobind for that matter must enforce the correct sap usage
241 * otherwise all hell will break loose.
242 * Returns: 0 upon success, negative otherwise.
244 static int llc_ui_autobind(struct socket *sock, struct sockaddr_llc *addr)
246 struct sock *sk = sock->sk;
247 struct llc_opt *llc = llc_sk(sk);
254 llc->dev = dev_getfirstbyhwtype(addr->sllc_arphrd);
258 llc->laddr.lsap = llc_ui_autoport();
259 if (!llc->laddr.lsap)
261 rc = -EBUSY; /* some other network layer is using the sap */
262 sap = llc_sap_open(llc->laddr.lsap, NULL);
265 memcpy(llc->laddr.mac, llc->dev->dev_addr, IFHWADDRLEN);
266 memcpy(&llc->addr, addr, sizeof(llc->addr));
267 /* assign new connection to its SAP */
268 llc_sap_add_socket(sap, sk);
269 rc = sk->sk_zapped = 0;
275 * llc_ui_bind - bind a socket to a specific address.
276 * @sock: Socket to bind an address to.
277 * @uaddr: Address the user wants the socket bound to.
278 * @addrlen: Length of the uaddr structure.
280 * Bind a socket to a specific address. For llc a user is able to bind to
281 * a specific sap only or mac + sap. If the user only specifies a sap and
282 * a null dmac (all zeros) the user is attempting to bind to an entire
283 * sap. This will stop anyone else on the local system from using that
284 * sap. If someone else has a mac + sap open the bind to null + sap will
286 * If the user desires to bind to a specific mac + sap, it is possible to
287 * have multiple sap connections via multiple macs.
288 * Bind and autobind for that matter must enforce the correct sap usage
289 * otherwise all hell will break loose.
290 * Returns: 0 upon success, negative otherwise.
292 static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen)
294 struct sockaddr_llc *addr = (struct sockaddr_llc *)uaddr;
295 struct sock *sk = sock->sk;
296 struct llc_opt *llc = llc_sk(sk);
300 dprintk("%s: binding %02X\n", __FUNCTION__, addr->sllc_sap);
301 if (!sk->sk_zapped || addrlen != sizeof(*addr))
304 if (addr->sllc_family != AF_LLC)
306 if (!addr->sllc_sap) {
308 addr->sllc_sap = llc_ui_autoport();
312 sap = llc_sap_find(addr->sllc_sap);
314 sap = llc_sap_open(addr->sllc_sap, NULL);
315 rc = -EBUSY; /* some other network layer is using the sap */
319 struct llc_addr laddr, daddr;
322 memset(&laddr, 0, sizeof(laddr));
323 memset(&daddr, 0, sizeof(daddr));
325 * FIXME: check if the the address is multicast,
326 * only SOCK_DGRAM can do this.
328 memcpy(laddr.mac, addr->sllc_mac, IFHWADDRLEN);
329 laddr.lsap = addr->sllc_sap;
330 rc = -EADDRINUSE; /* mac + sap clash. */
331 ask = llc_lookup_established(sap, &daddr, &laddr);
337 llc->laddr.lsap = addr->sllc_sap;
338 memcpy(llc->laddr.mac, addr->sllc_mac, IFHWADDRLEN);
339 memcpy(&llc->addr, addr, sizeof(llc->addr));
340 /* assign new connection to its SAP */
341 llc_sap_add_socket(sap, sk);
342 rc = sk->sk_zapped = 0;
348 * llc_ui_shutdown - shutdown a connect llc2 socket.
349 * @sock: Socket to shutdown.
350 * @how: What part of the socket to shutdown.
352 * Shutdown a connected llc2 socket. Currently this function only supports
353 * shutting down both sends and receives (2), we could probably make this
354 * function such that a user can shutdown only half the connection but not
356 * Returns: 0 upon success, negative otherwise.
358 static int llc_ui_shutdown(struct socket *sock, int how)
360 struct sock *sk = sock->sk;
364 if (sk->sk_state != TCP_ESTABLISHED)
369 rc = llc_send_disc(sk);
371 rc = llc_ui_wait_for_disc(sk, sk->sk_rcvtimeo);
372 /* Wake up anyone sleeping in poll */
373 sk->sk_state_change(sk);
380 * llc_ui_connect - Connect to a remote llc2 mac + sap.
381 * @sock: Socket which will be connected to the remote destination.
382 * @uaddr: Remote and possibly the local address of the new connection.
383 * @addrlen: Size of uaddr structure.
384 * @flags: Operational flags specified by the user.
386 * Connect to a remote llc2 mac + sap. The caller must specify the
387 * destination mac and address to connect to. If the user hasn't previously
388 * called bind(2) with a smac the address of the first interface of the
389 * specified arp type will be used.
390 * This function will autobind if user did not previously call bind.
391 * Returns: 0 upon success, negative otherwise.
393 static int llc_ui_connect(struct socket *sock, struct sockaddr *uaddr,
394 int addrlen, int flags)
396 struct sock *sk = sock->sk;
397 struct llc_opt *llc = llc_sk(sk);
398 struct sockaddr_llc *addr = (struct sockaddr_llc *)uaddr;
399 struct net_device *dev;
403 if (addrlen != sizeof(*addr))
406 if (addr->sllc_family != AF_LLC)
408 /* bind connection to sap if user hasn't done it. */
410 /* bind to sap with null dev, exclusive */
411 rc = llc_ui_autobind(sock, addr);
414 llc->daddr.lsap = addr->sllc_sap;
415 memcpy(llc->daddr.mac, addr->sllc_mac, IFHWADDRLEN);
418 if (sk->sk_type != SOCK_STREAM)
421 if (sock->state == SS_CONNECTING)
423 sock->state = SS_CONNECTING;
424 sk->sk_state = TCP_SYN_SENT;
425 llc->link = llc_ui_next_link_no(llc->sap->laddr.lsap);
426 rc = llc_establish_connection(sk, dev->dev_addr,
427 addr->sllc_mac, addr->sllc_sap);
429 dprintk("%s: llc_ui_send_conn failed :-(\n", __FUNCTION__);
430 sock->state = SS_UNCONNECTED;
431 sk->sk_state = TCP_CLOSE;
434 rc = llc_ui_wait_for_conn(sk, sk->sk_rcvtimeo);
436 dprintk("%s: llc_ui_wait_for_conn failed=%d\n", __FUNCTION__, rc);
443 * llc_ui_listen - allow a normal socket to accept incoming connections
444 * @sock: Socket to allow incoming connections on.
445 * @backlog: Number of connections to queue.
447 * Allow a normal socket to accept incoming connections.
448 * Returns 0 upon success, negative otherwise.
450 static int llc_ui_listen(struct socket *sock, int backlog)
452 struct sock *sk = sock->sk;
456 if (sock->state != SS_UNCONNECTED)
459 if (sk->sk_type != SOCK_STREAM)
465 if (!(unsigned)backlog) /* BSDism */
467 sk->sk_max_ack_backlog = backlog;
468 if (sk->sk_state != TCP_LISTEN) {
469 sk->sk_ack_backlog = 0;
470 sk->sk_state = TCP_LISTEN;
472 sk->sk_socket->flags |= __SO_ACCEPTCON;
478 static int llc_ui_wait_for_disc(struct sock *sk, int timeout)
480 DECLARE_WAITQUEUE(wait, current);
483 add_wait_queue_exclusive(sk->sk_sleep, &wait);
485 __set_current_state(TASK_INTERRUPTIBLE);
487 if (sk->sk_state != TCP_CLOSE) {
489 timeout = schedule_timeout(timeout);
494 if (signal_pending(current))
500 __set_current_state(TASK_RUNNING);
501 remove_wait_queue(sk->sk_sleep, &wait);
505 static int llc_ui_wait_for_conn(struct sock *sk, int timeout)
507 DECLARE_WAITQUEUE(wait, current);
510 add_wait_queue_exclusive(sk->sk_sleep, &wait);
512 __set_current_state(TASK_INTERRUPTIBLE);
514 if (sk->sk_state == TCP_CLOSE)
517 if (sk->sk_state != TCP_ESTABLISHED) {
519 timeout = schedule_timeout(timeout);
524 if (signal_pending(current))
530 __set_current_state(TASK_RUNNING);
531 remove_wait_queue(sk->sk_sleep, &wait);
535 static int llc_ui_wait_for_data(struct sock *sk, int timeout)
537 DECLARE_WAITQUEUE(wait, current);
540 add_wait_queue_exclusive(sk->sk_sleep, &wait);
542 __set_current_state(TASK_INTERRUPTIBLE);
543 if (sk->sk_shutdown & RCV_SHUTDOWN)
546 * Well, if we have backlog, try to process it now.
548 if (sk->sk_backlog.tail) {
553 if (skb_queue_empty(&sk->sk_receive_queue)) {
555 timeout = schedule_timeout(timeout);
560 if (signal_pending(current))
566 __set_current_state(TASK_RUNNING);
567 remove_wait_queue(sk->sk_sleep, &wait);
571 static int llc_ui_wait_for_busy_core(struct sock *sk, int timeout)
573 DECLARE_WAITQUEUE(wait, current);
574 struct llc_opt *llc = llc_sk(sk);
577 add_wait_queue_exclusive(sk->sk_sleep, &wait);
579 dprintk("%s: looping...\n", __FUNCTION__);
580 __set_current_state(TASK_INTERRUPTIBLE);
582 if (sk->sk_shutdown & RCV_SHUTDOWN)
585 if (llc_data_accept_state(llc->state) || llc->p_flag) {
587 timeout = schedule_timeout(timeout);
592 if (signal_pending(current))
598 __set_current_state(TASK_RUNNING);
599 remove_wait_queue(sk->sk_sleep, &wait);
604 * llc_ui_accept - accept a new incoming connection.
605 * @sock: Socket which connections arrive on.
606 * @newsock: Socket to move incoming connection to.
607 * @flags: User specified operational flags.
609 * Accept a new incoming connection.
610 * Returns 0 upon success, negative otherwise.
612 static int llc_ui_accept(struct socket *sock, struct socket *newsock, int flags)
614 struct sock *sk = sock->sk, *newsk;
615 struct llc_opt *llc, *newllc;
617 int rc = -EOPNOTSUPP;
619 dprintk("%s: accepting on %02X\n", __FUNCTION__,
620 llc_sk(sk)->laddr.lsap);
622 if (sk->sk_type != SOCK_STREAM)
625 if (sock->state != SS_UNCONNECTED || sk->sk_state != TCP_LISTEN)
627 /* wait for a connection to arrive. */
628 rc = llc_ui_wait_for_data(sk, sk->sk_rcvtimeo);
631 dprintk("%s: got a new connection on %02X\n", __FUNCTION__,
632 llc_sk(sk)->laddr.lsap);
633 skb = skb_dequeue(&sk->sk_receive_queue);
639 /* attach connection to a new socket. */
640 llc_ui_sk_init(newsock, newsk);
641 newsk->sk_zapped = 0;
642 newsk->sk_state = TCP_ESTABLISHED;
643 newsock->state = SS_CONNECTED;
645 newllc = llc_sk(newsk);
646 memcpy(&newllc->addr, &llc->addr, sizeof(newllc->addr));
647 newllc->link = llc_ui_next_link_no(newllc->laddr.lsap);
649 /* put original socket back into a clean listen state. */
650 sk->sk_state = TCP_LISTEN;
651 sk->sk_ack_backlog--;
653 dprintk("%s: ok success on %02X, client on %02X\n", __FUNCTION__,
654 llc_sk(sk)->addr.sllc_sap, newllc->daddr.lsap);
663 * llc_ui_recvmsg - copy received data to the socket user.
664 * @sock: Socket to copy data from.
665 * @msg: Various user space related information.
666 * @size: Size of user buffer.
667 * @flags: User specified flags.
669 * Copy received data to the socket user.
670 * Returns non-negative upon success, negative otherwise.
672 static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
673 struct msghdr *msg, size_t size, int flags)
675 struct sock *sk = sock->sk;
676 struct sockaddr_llc *uaddr = (struct sockaddr_llc *)msg->msg_name;
679 int rc = -ENOMEM, timeout;
680 int noblock = flags & MSG_DONTWAIT;
682 dprintk("%s: receiving in %02X from %02X\n", __FUNCTION__,
683 llc_sk(sk)->laddr.lsap, llc_sk(sk)->daddr.lsap);
685 timeout = sock_rcvtimeo(sk, noblock);
686 rc = llc_ui_wait_for_data(sk, timeout);
688 dprintk("%s: llc_ui_wait_for_data failed recv "
689 "in %02X from %02X\n", __FUNCTION__,
690 llc_sk(sk)->laddr.lsap, llc_sk(sk)->daddr.lsap);
693 skb = skb_dequeue(&sk->sk_receive_queue);
694 if (!skb) /* shutdown */
699 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
702 if (skb->len > copied) {
703 skb_pull(skb, copied);
704 skb_queue_head(&sk->sk_receive_queue, skb);
707 memcpy(uaddr, llc_ui_skb_cb(skb), sizeof(*uaddr));
708 msg->msg_namelen = sizeof(*uaddr);
715 return rc ? : copied;
719 * llc_ui_sendmsg - Transmit data provided by the socket user.
720 * @sock: Socket to transmit data from.
721 * @msg: Various user related information.
722 * @len: Length of data to transmit.
724 * Transmit data provided by the socket user.
725 * Returns non-negative upon success, negative otherwise.
727 static int llc_ui_sendmsg(struct kiocb *iocb, struct socket *sock,
728 struct msghdr *msg, size_t len)
730 struct sock *sk = sock->sk;
731 struct llc_opt *llc = llc_sk(sk);
732 struct sockaddr_llc *addr = (struct sockaddr_llc *)msg->msg_name;
733 int flags = msg->msg_flags;
734 int noblock = flags & MSG_DONTWAIT;
735 struct net_device *dev;
738 int rc = -EINVAL, copied = 0, hdrlen;
740 dprintk("%s: sending from %02X to %02X\n", __FUNCTION__,
741 llc->laddr.lsap, llc->daddr.lsap);
744 if (msg->msg_namelen < sizeof(*addr))
747 if (llc_ui_addr_null(&llc->addr))
751 /* must bind connection to sap if user hasn't done it. */
753 /* bind to sap with null dev, exclusive. */
754 rc = llc_ui_autobind(sock, addr);
759 hdrlen = dev->hard_header_len + llc_ui_header_len(sk, addr);
763 copied = size - hdrlen;
765 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
771 skb->protocol = llc_proto_type(addr->sllc_arphrd);
772 skb_reserve(skb, hdrlen);
773 rc = memcpy_fromiovec(skb_put(skb, copied), msg->msg_iov, copied);
776 if (sk->sk_type == SOCK_DGRAM || addr->sllc_ua) {
777 llc_build_and_send_ui_pkt(llc->sap, skb, addr->sllc_mac,
781 if (addr->sllc_test) {
782 llc_build_and_send_test_pkt(llc->sap, skb, addr->sllc_mac,
786 if (addr->sllc_xid) {
787 llc_build_and_send_xid_pkt(llc->sap, skb, addr->sllc_mac,
792 if (!(sk->sk_type == SOCK_STREAM && !addr->sllc_ua))
794 rc = llc_ui_send_data(sk, skb, noblock);
796 dprintk("%s: llc_ui_send_data failed: %d\n", __FUNCTION__, rc);
802 dprintk("%s: failed sending from %02X to %02X: %d\n",
803 __FUNCTION__, llc->laddr.lsap, llc->daddr.lsap, rc);
805 return rc ? : copied;
809 * llc_ui_getname - return the address info of a socket
810 * @sock: Socket to get address of.
811 * @uaddr: Address structure to return information.
812 * @uaddrlen: Length of address structure.
813 * @peer: Does user want local or remote address information.
815 * Return the address information of a socket.
817 static int llc_ui_getname(struct socket *sock, struct sockaddr *uaddr,
818 int *uaddrlen, int peer)
820 struct sockaddr_llc sllc;
821 struct sock *sk = sock->sk;
822 struct llc_opt *llc = llc_sk(sk);
828 *uaddrlen = sizeof(sllc);
829 memset(uaddr, 0, *uaddrlen);
832 if (sk->sk_state != TCP_ESTABLISHED)
835 sllc.sllc_arphrd = llc->dev->type;
836 sllc.sllc_sap = llc->daddr.lsap;
837 memcpy(&sllc.sllc_mac, &llc->daddr.mac, IFHWADDRLEN);
842 sllc.sllc_sap = llc->sap->laddr.lsap;
845 sllc.sllc_arphrd = llc->dev->type;
846 memcpy(&sllc.sllc_mac, &llc->dev->dev_addr,
851 sllc.sllc_family = AF_LLC;
852 memcpy(uaddr, &sllc, sizeof(sllc));
859 * llc_ui_ioctl - io controls for PF_LLC
860 * @sock: Socket to get/set info
862 * @arg: optional argument for cmd
864 * get/set info on llc sockets
866 static int llc_ui_ioctl(struct socket *sock, unsigned int cmd,
869 return dev_ioctl(cmd, (void __user *)arg);
873 * llc_ui_setsockopt - set various connection specific parameters.
874 * @sock: Socket to set options on.
875 * @level: Socket level user is requesting operations on.
876 * @optname: Operation name.
877 * @optval User provided operation data.
878 * @optlen: Length of optval.
880 * Set various connection specific parameters.
882 static int llc_ui_setsockopt(struct socket *sock, int level, int optname,
883 char __user *optval, int optlen)
885 struct sock *sk = sock->sk;
886 struct llc_opt *llc = llc_sk(sk);
887 int rc = -EINVAL, opt;
890 if (level != SOL_LLC || optlen != sizeof(int))
892 rc = get_user(opt, (int __user *)optval);
898 if (opt > LLC_OPT_MAX_RETRY)
903 if (opt > LLC_OPT_MAX_SIZE)
907 case LLC_OPT_ACK_TMR_EXP:
908 if (opt > LLC_OPT_MAX_ACK_TMR_EXP)
910 llc->ack_timer.expire = opt;
912 case LLC_OPT_P_TMR_EXP:
913 if (opt > LLC_OPT_MAX_P_TMR_EXP)
915 llc->pf_cycle_timer.expire = opt;
917 case LLC_OPT_REJ_TMR_EXP:
918 if (opt > LLC_OPT_MAX_REJ_TMR_EXP)
920 llc->rej_sent_timer.expire = opt;
922 case LLC_OPT_BUSY_TMR_EXP:
923 if (opt > LLC_OPT_MAX_BUSY_TMR_EXP)
925 llc->busy_state_timer.expire = opt;
928 if (opt > LLC_OPT_MAX_WIN)
933 if (opt > LLC_OPT_MAX_WIN)
948 * llc_ui_getsockopt - get connection specific socket info
949 * @sock: Socket to get information from.
950 * @level: Socket level user is requesting operations on.
951 * @optname: Operation name.
952 * @optval: Variable to return operation data in.
953 * @optlen: Length of optval.
955 * Get connection specific socket information.
957 static int llc_ui_getsockopt(struct socket *sock, int level, int optname,
958 char __user *optval, int __user *optlen)
960 struct sock *sk = sock->sk;
961 struct llc_opt *llc = llc_sk(sk);
962 int val = 0, len = 0, rc = -EINVAL;
965 if (level != SOL_LLC)
967 rc = get_user(len, optlen);
971 if (len != sizeof(int))
975 val = llc->n2; break;
977 val = llc->n1; break;
978 case LLC_OPT_ACK_TMR_EXP:
979 val = llc->ack_timer.expire; break;
980 case LLC_OPT_P_TMR_EXP:
981 val = llc->pf_cycle_timer.expire; break;
982 case LLC_OPT_REJ_TMR_EXP:
983 val = llc->rej_sent_timer.expire; break;
984 case LLC_OPT_BUSY_TMR_EXP:
985 val = llc->busy_state_timer.expire; break;
989 val = llc->rw; break;
995 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1002 static struct net_proto_family llc_ui_family_ops = {
1004 .create = llc_ui_create,
1005 .owner = THIS_MODULE,
1008 static struct proto_ops llc_ui_ops = {
1010 .owner = THIS_MODULE,
1011 .release = llc_ui_release,
1012 .bind = llc_ui_bind,
1013 .connect = llc_ui_connect,
1014 .socketpair = sock_no_socketpair,
1015 .accept = llc_ui_accept,
1016 .getname = llc_ui_getname,
1017 .poll = datagram_poll,
1018 .ioctl = llc_ui_ioctl,
1019 .listen = llc_ui_listen,
1020 .shutdown = llc_ui_shutdown,
1021 .setsockopt = llc_ui_setsockopt,
1022 .getsockopt = llc_ui_getsockopt,
1023 .sendmsg = llc_ui_sendmsg,
1024 .recvmsg = llc_ui_recvmsg,
1025 .mmap = sock_no_mmap,
1026 .sendpage = sock_no_sendpage,
1029 extern void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb);
1030 extern void llc_conn_handler(struct llc_sap *sap, struct sk_buff *skb);
1032 static int __init llc2_init(void)
1036 llc_build_offset_table();
1038 llc_ui_sap_last_autoport = LLC_SAP_DYN_START;
1039 rc = llc_proc_init();
1041 sock_register(&llc_ui_family_ops);
1042 llc_add_pack(LLC_DEST_SAP, llc_sap_handler);
1043 llc_add_pack(LLC_DEST_CONN, llc_conn_handler);
1048 static void __exit llc2_exit(void)
1051 llc_remove_pack(LLC_DEST_SAP);
1052 llc_remove_pack(LLC_DEST_CONN);
1053 sock_unregister(PF_LLC);
1057 module_init(llc2_init);
1058 module_exit(llc2_exit);
1060 MODULE_LICENSE("GPL");
1061 MODULE_AUTHOR("Procom 1997, Jay Schullist 2001, Arnaldo C. Melo 2001-2003");
1062 MODULE_DESCRIPTION("IEEE 802.2 PF_LLC support");
1063 MODULE_ALIAS_NETPROTO(PF_LLC);