3 * DECnet An implementation of the DECnet protocol suite for the LINUX
4 * operating system. DECnet is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * DECnet Socket Layer Interface
9 * Authors: Eduardo Marcelo Serrat <emserrat@geocities.com>
10 * Patrick Caulfield <patrick@pandh.demon.co.uk>
13 * Steve Whitehouse: Copied from Eduardo Serrat and Patrick Caulfield's
14 * version of the code. Original copyright preserved
16 * Steve Whitehouse: Some bug fixes, cleaning up some code to make it
17 * compatible with my routing layer.
18 * Steve Whitehouse: Merging changes from Eduardo Serrat and Patrick
20 * Steve Whitehouse: Further bug fixes, checking module code still works
21 * with new routing layer.
22 * Steve Whitehouse: Additional set/get_sockopt() calls.
23 * Steve Whitehouse: Fixed TIOCINQ ioctl to be same as Eduardo's new
25 * Steve Whitehouse: recvmsg() changed to try and behave in a POSIX like
26 * way. Didn't manage it entirely, but its better.
27 * Steve Whitehouse: ditto for sendmsg().
28 * Steve Whitehouse: A selection of bug fixes to various things.
29 * Steve Whitehouse: Added TIOCOUTQ ioctl.
30 * Steve Whitehouse: Fixes to username2sockaddr & sockaddr2username.
31 * Steve Whitehouse: Fixes to connect() error returns.
32 * Patrick Caulfield: Fixes to delayed acceptance logic.
33 * David S. Miller: New socket locking
34 * Steve Whitehouse: Socket list hashing/locking
35 * Arnaldo C. Melo: use capable, not suser
36 * Steve Whitehouse: Removed unused code. Fix to use sk->allocation
38 * Patrick Caulfield: /proc/net/decnet now has object name/number
39 * Steve Whitehouse: Fixed local port allocation, hashed sk list
40 * Matthew Wilcox: Fixes for dn_ioctl()
41 * Steve Whitehouse: New connect/accept logic to allow timeouts and
42 * prepare for sendpage etc.
46 /******************************************************************************
47 (c) 1995-1998 E.M. Serrat emserrat@geocities.com
49 This program is free software; you can redistribute it and/or modify
50 it under the terms of the GNU General Public License as published by
51 the Free Software Foundation; either version 2 of the License, or
54 This program is distributed in the hope that it will be useful,
55 but WITHOUT ANY WARRANTY; without even the implied warranty of
56 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
57 GNU General Public License for more details.
61 Version Kernel Date Author/Comments
62 ------- ------ ---- ---------------
63 Version 0.0.1 2.0.30 01-dic-97 Eduardo Marcelo Serrat
64 (emserrat@geocities.com)
66 First Development of DECnet Socket La-
67 yer for Linux. Only supports outgoing
70 Version 0.0.2 2.1.105 20-jun-98 Patrick J. Caulfield
71 (patrick@pandh.demon.co.uk)
73 Port to new kernel development version.
75 Version 0.0.3 2.1.106 25-jun-98 Eduardo Marcelo Serrat
76 (emserrat@geocities.com)
78 Added support for incoming connections
79 so we can start developing server apps
83 Version 0.0.4 2.1.109 21-jul-98 Eduardo Marcelo Serrat
84 (emserrat@geocities.com)
86 Added support for X11R6.4. Now we can
87 use DECnet transport for X on Linux!!!
89 Version 0.0.5 2.1.110 01-aug-98 Eduardo Marcelo Serrat
90 (emserrat@geocities.com)
91 Removed bugs on flow control
92 Removed bugs on incoming accessdata
95 Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat
100 *******************************************************************************/
102 #include <linux/config.h>
103 #include <linux/module.h>
104 #include <linux/errno.h>
105 #include <linux/types.h>
106 #include <linux/slab.h>
107 #include <linux/socket.h>
108 #include <linux/in.h>
109 #include <linux/kernel.h>
110 #include <linux/sched.h>
111 #include <linux/timer.h>
112 #include <linux/string.h>
113 #include <linux/sockios.h>
114 #include <linux/net.h>
115 #include <linux/netdevice.h>
116 #include <linux/inet.h>
117 #include <linux/route.h>
118 #include <linux/netfilter.h>
119 #include <linux/seq_file.h>
120 #include <net/sock.h>
121 #include <net/tcp_states.h>
122 #include <net/flow.h>
123 #include <asm/system.h>
124 #include <asm/ioctls.h>
125 #include <linux/mm.h>
126 #include <linux/interrupt.h>
127 #include <linux/proc_fs.h>
128 #include <linux/stat.h>
129 #include <linux/init.h>
130 #include <linux/poll.h>
131 #include <net/neighbour.h>
134 #include <net/dn_nsp.h>
135 #include <net/dn_dev.h>
136 #include <net/dn_route.h>
137 #include <net/dn_fib.h>
138 #include <net/dn_neigh.h>
145 static void dn_keepalive(struct sock *sk);
147 #define DN_SK_HASH_SHIFT 8
148 #define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT)
149 #define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1)
152 static struct proto_ops dn_proto_ops;
153 static DEFINE_RWLOCK(dn_hash_lock);
154 static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
155 static struct hlist_head dn_wild_sk;
157 static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen, int flags);
158 static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
160 static struct hlist_head *dn_find_list(struct sock *sk)
162 struct dn_scp *scp = DN_SK(sk);
164 if (scp->addr.sdn_flags & SDF_WILD)
165 return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL;
167 return &dn_sk_hash[scp->addrloc & DN_SK_HASH_MASK];
171 * Valid ports are those greater than zero and not already in use.
173 static int check_port(unsigned short port)
176 struct hlist_node *node;
181 sk_for_each(sk, node, &dn_sk_hash[port & DN_SK_HASH_MASK]) {
182 struct dn_scp *scp = DN_SK(sk);
183 if (scp->addrloc == port)
189 static unsigned short port_alloc(struct sock *sk)
191 struct dn_scp *scp = DN_SK(sk);
192 static unsigned short port = 0x2000;
193 unsigned short i_port = port;
195 while(check_port(++port) != 0) {
206 * Since this is only ever called from user
207 * level, we don't need a write_lock() version
210 static int dn_hash_sock(struct sock *sk)
212 struct dn_scp *scp = DN_SK(sk);
213 struct hlist_head *list;
216 BUG_ON(sk_hashed(sk));
218 write_lock_bh(&dn_hash_lock);
220 if (!scp->addrloc && !port_alloc(sk))
224 if ((list = dn_find_list(sk)) == NULL)
227 sk_add_node(sk, list);
230 write_unlock_bh(&dn_hash_lock);
234 static void dn_unhash_sock(struct sock *sk)
236 write_lock(&dn_hash_lock);
237 sk_del_node_init(sk);
238 write_unlock(&dn_hash_lock);
241 static void dn_unhash_sock_bh(struct sock *sk)
243 write_lock_bh(&dn_hash_lock);
244 sk_del_node_init(sk);
245 write_unlock_bh(&dn_hash_lock);
248 static struct hlist_head *listen_hash(struct sockaddr_dn *addr)
251 unsigned hash = addr->sdn_objnum;
254 hash = addr->sdn_objnamel;
255 for(i = 0; i < dn_ntohs(addr->sdn_objnamel); i++) {
256 hash ^= addr->sdn_objname[i];
261 return &dn_sk_hash[hash & DN_SK_HASH_MASK];
265 * Called to transform a socket from bound (i.e. with a local address)
266 * into a listening socket (doesn't need a local port number) and rehashes
267 * based upon the object name/number.
269 static void dn_rehash_sock(struct sock *sk)
271 struct hlist_head *list;
272 struct dn_scp *scp = DN_SK(sk);
274 if (scp->addr.sdn_flags & SDF_WILD)
277 write_lock_bh(&dn_hash_lock);
278 sk_del_node_init(sk);
279 DN_SK(sk)->addrloc = 0;
280 list = listen_hash(&DN_SK(sk)->addr);
281 sk_add_node(sk, list);
282 write_unlock_bh(&dn_hash_lock);
285 int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type)
293 *buf++ = sdn->sdn_objnum;
297 *buf++ = dn_ntohs(sdn->sdn_objnamel);
298 memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel));
299 len = 3 + dn_ntohs(sdn->sdn_objnamel);
304 *buf++ = dn_ntohs(sdn->sdn_objnamel);
305 memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel));
306 len = 7 + dn_ntohs(sdn->sdn_objnamel);
314 * On reception of usernames, we handle types 1 and 0 for destination
315 * addresses only. Types 2 and 4 are used for source addresses, but the
316 * UIC, GIC are ignored and they are both treated the same way. Type 3
317 * is never used as I've no idea what its purpose might be or what its
320 int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt)
327 sdn->sdn_objnamel = dn_htons(0);
328 memset(sdn->sdn_objname, 0, DN_MAXOBJL);
339 sdn->sdn_objnum = type;
361 sdn->sdn_objnamel = dn_htons(*data++);
362 len -= dn_ntohs(sdn->sdn_objnamel);
364 if ((len < 0) || (dn_ntohs(sdn->sdn_objnamel) > namel))
367 memcpy(sdn->sdn_objname, data, dn_ntohs(sdn->sdn_objnamel));
372 struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr)
374 struct hlist_head *list = listen_hash(addr);
375 struct hlist_node *node;
378 read_lock(&dn_hash_lock);
379 sk_for_each(sk, node, list) {
380 struct dn_scp *scp = DN_SK(sk);
381 if (sk->sk_state != TCP_LISTEN)
383 if (scp->addr.sdn_objnum) {
384 if (scp->addr.sdn_objnum != addr->sdn_objnum)
387 if (addr->sdn_objnum)
389 if (scp->addr.sdn_objnamel != addr->sdn_objnamel)
391 if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, dn_ntohs(addr->sdn_objnamel)) != 0)
395 read_unlock(&dn_hash_lock);
399 sk = sk_head(&dn_wild_sk);
401 if (sk->sk_state == TCP_LISTEN)
407 read_unlock(&dn_hash_lock);
411 struct sock *dn_find_by_skb(struct sk_buff *skb)
413 struct dn_skb_cb *cb = DN_SKB_CB(skb);
415 struct hlist_node *node;
418 read_lock(&dn_hash_lock);
419 sk_for_each(sk, node, &dn_sk_hash[cb->dst_port & DN_SK_HASH_MASK]) {
421 if (cb->src != dn_saddr2dn(&scp->peer))
423 if (cb->dst_port != scp->addrloc)
425 if (scp->addrrem && (cb->src_port != scp->addrrem))
432 read_unlock(&dn_hash_lock);
438 static void dn_destruct(struct sock *sk)
440 struct dn_scp *scp = DN_SK(sk);
442 skb_queue_purge(&scp->data_xmit_queue);
443 skb_queue_purge(&scp->other_xmit_queue);
444 skb_queue_purge(&scp->other_receive_queue);
446 dst_release(xchg(&sk->sk_dst_cache, NULL));
449 static struct proto dn_proto = {
451 .owner = THIS_MODULE,
452 .obj_size = sizeof(struct dn_sock),
455 static struct sock *dn_alloc_sock(struct socket *sock,
456 unsigned int __nocast gfp)
459 struct sock *sk = sk_alloc(PF_DECnet, gfp, &dn_proto, 1);
465 sock->ops = &dn_proto_ops;
466 sock_init_data(sock, sk);
468 sk->sk_backlog_rcv = dn_nsp_backlog_rcv;
469 sk->sk_destruct = dn_destruct;
471 sk->sk_family = PF_DECnet;
473 sk->sk_allocation = gfp;
475 /* Initialization of DECnet Session Control Port */
477 scp->state = DN_O; /* Open */
478 scp->numdat = 1; /* Next data seg to tx */
479 scp->numoth = 1; /* Next oth data to tx */
480 scp->ackxmt_dat = 0; /* Last data seg ack'ed */
481 scp->ackxmt_oth = 0; /* Last oth data ack'ed */
482 scp->ackrcv_dat = 0; /* Highest data ack recv*/
483 scp->ackrcv_oth = 0; /* Last oth data ack rec*/
484 scp->flowrem_sw = DN_SEND;
485 scp->flowloc_sw = DN_SEND;
486 scp->flowrem_dat = 0;
487 scp->flowrem_oth = 1;
488 scp->flowloc_dat = 0;
489 scp->flowloc_oth = 1;
490 scp->services_rem = 0;
491 scp->services_loc = 1 | NSP_FC_NONE;
493 scp->info_loc = 0x03; /* NSP version 4.1 */
494 scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */
497 scp->accept_mode = ACC_IMMED;
498 scp->addr.sdn_family = AF_DECnet;
499 scp->peer.sdn_family = AF_DECnet;
500 scp->accessdata.acc_accl = 5;
501 memcpy(scp->accessdata.acc_acc, "LINUX", 5);
503 scp->max_window = NSP_MAX_WINDOW;
504 scp->snd_window = NSP_MIN_WINDOW;
505 scp->nsp_srtt = NSP_INITIAL_SRTT;
506 scp->nsp_rttvar = NSP_INITIAL_RTTVAR;
507 scp->nsp_rxtshift = 0;
509 skb_queue_head_init(&scp->data_xmit_queue);
510 skb_queue_head_init(&scp->other_xmit_queue);
511 skb_queue_head_init(&scp->other_receive_queue);
514 scp->persist_fxn = NULL;
515 scp->keepalive = 10 * HZ;
516 scp->keepalive_fxn = dn_keepalive;
518 init_timer(&scp->delack_timer);
519 scp->delack_pending = 0;
520 scp->delack_fxn = dn_nsp_delayed_ack;
522 dn_start_slow_timer(sk);
529 * FIXME: Should respond to SO_KEEPALIVE etc.
531 static void dn_keepalive(struct sock *sk)
533 struct dn_scp *scp = DN_SK(sk);
536 * By checking the other_data transmit queue is empty
537 * we are double checking that we are not sending too
538 * many of these keepalive frames.
540 if (skb_queue_empty(&scp->other_xmit_queue))
541 dn_nsp_send_link(sk, DN_NOCHANGE, 0);
546 * Timer for shutdown/destroyed sockets.
547 * When socket is dead & no packets have been sent for a
548 * certain amount of time, they are removed by this
549 * routine. Also takes care of sending out DI & DC
550 * frames at correct times.
552 int dn_destroy_timer(struct sock *sk)
554 struct dn_scp *scp = DN_SK(sk);
556 scp->persist = dn_nsp_persist(sk);
560 dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
561 if (scp->nsp_rxtshift >= decnet_di_count)
566 dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
567 if (scp->nsp_rxtshift >= decnet_dr_count)
572 if (scp->nsp_rxtshift < decnet_dn_count) {
573 /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */
574 dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC);
579 scp->persist = (HZ * decnet_time_wait);
584 if ((jiffies - scp->stamp) >= (HZ * decnet_time_wait)) {
593 static void dn_destroy_sock(struct sock *sk)
595 struct dn_scp *scp = DN_SK(sk);
597 scp->nsp_rxtshift = 0; /* reset back off */
600 if (sk->sk_socket->state != SS_UNCONNECTED)
601 sk->sk_socket->state = SS_DISCONNECTING;
604 sk->sk_state = TCP_CLOSE;
608 dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
610 scp->persist_fxn = dn_destroy_timer;
611 scp->persist = dn_nsp_persist(sk);
621 dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation);
630 scp->persist_fxn = dn_destroy_timer;
631 scp->persist = dn_nsp_persist(sk);
634 printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n");
636 dn_stop_slow_timer(sk);
638 dn_unhash_sock_bh(sk);
645 char *dn_addr2asc(dn_address addr, char *buf)
647 unsigned short node, area;
649 node = addr & 0x03ff;
651 sprintf(buf, "%hd.%hd", area, node);
658 static int dn_create(struct socket *sock, int protocol)
664 if (protocol != DNPROTO_NSP)
665 return -EPROTONOSUPPORT;
670 return -ESOCKTNOSUPPORT;
674 if ((sk = dn_alloc_sock(sock, GFP_KERNEL)) == NULL)
677 sk->sk_protocol = protocol;
684 dn_release(struct socket *sock)
686 struct sock *sk = sock->sk;
700 static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
702 struct sock *sk = sock->sk;
703 struct dn_scp *scp = DN_SK(sk);
704 struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr;
705 struct net_device *dev;
708 if (addr_len != sizeof(struct sockaddr_dn))
711 if (saddr->sdn_family != AF_DECnet)
714 if (dn_ntohs(saddr->sdn_nodeaddrl) && (dn_ntohs(saddr->sdn_nodeaddrl) != 2))
717 if (dn_ntohs(saddr->sdn_objnamel) > DN_MAXOBJL)
720 if (saddr->sdn_flags & ~SDF_WILD)
724 if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum ||
725 (saddr->sdn_flags & SDF_WILD)))
729 * Maybe put the default actions in the default security ops for
730 * dn_prot_sock ? Would be nice if the capable call would go there
733 if (security_dn_prot_sock(saddr) &&
734 !capable(CAP_NET_BIND_SERVICE) ||
735 saddr->sdn_objnum || (saddr->sdn_flags & SDF_WILD))
740 if (!(saddr->sdn_flags & SDF_WILD)) {
741 if (dn_ntohs(saddr->sdn_nodeaddrl)) {
742 read_lock(&dev_base_lock);
743 for(dev = dev_base; dev; dev = dev->next) {
746 if (dn_dev_islocal(dev, dn_saddr2dn(saddr)))
749 read_unlock(&dev_base_lock);
751 return -EADDRNOTAVAIL;
757 if (sock_flag(sk, SOCK_ZAPPED)) {
758 memcpy(&scp->addr, saddr, addr_len);
759 sock_reset_flag(sk, SOCK_ZAPPED);
761 rv = dn_hash_sock(sk);
763 sock_set_flag(sk, SOCK_ZAPPED);
771 static int dn_auto_bind(struct socket *sock)
773 struct sock *sk = sock->sk;
774 struct dn_scp *scp = DN_SK(sk);
777 sock_reset_flag(sk, SOCK_ZAPPED);
779 scp->addr.sdn_flags = 0;
780 scp->addr.sdn_objnum = 0;
783 * This stuff is to keep compatibility with Eduardo's
784 * patch. I hope I can dispense with it shortly...
786 if ((scp->accessdata.acc_accl != 0) &&
787 (scp->accessdata.acc_accl <= 12)) {
789 scp->addr.sdn_objnamel = dn_htons(scp->accessdata.acc_accl);
790 memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, dn_ntohs(scp->addr.sdn_objnamel));
792 scp->accessdata.acc_accl = 0;
793 memset(scp->accessdata.acc_acc, 0, 40);
795 /* End of compatibility stuff */
797 scp->addr.sdn_add.a_len = dn_htons(2);
798 rv = dn_dev_bind_default((dn_address *)scp->addr.sdn_add.a_addr);
800 rv = dn_hash_sock(sk);
802 sock_set_flag(sk, SOCK_ZAPPED);
808 static int dn_confirm_accept(struct sock *sk, long *timeo,
809 unsigned int __nocast allocation)
811 struct dn_scp *scp = DN_SK(sk);
815 if (scp->state != DN_CR)
819 scp->segsize_loc = dst_metric(__sk_dst_get(sk), RTAX_ADVMSS);
820 dn_send_conn_conf(sk, allocation);
822 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
825 if (scp->state == DN_CC)
826 *timeo = schedule_timeout(*timeo);
829 if (scp->state == DN_RUN)
831 err = sock_error(sk);
834 err = sock_intr_errno(*timeo);
835 if (signal_pending(current))
840 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
842 finish_wait(sk->sk_sleep, &wait);
844 sk->sk_socket->state = SS_CONNECTED;
845 } else if (scp->state != DN_CC) {
846 sk->sk_socket->state = SS_UNCONNECTED;
851 static int dn_wait_run(struct sock *sk, long *timeo)
853 struct dn_scp *scp = DN_SK(sk);
857 if (scp->state == DN_RUN)
863 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
866 if (scp->state == DN_CI || scp->state == DN_CC)
867 *timeo = schedule_timeout(*timeo);
870 if (scp->state == DN_RUN)
872 err = sock_error(sk);
875 err = sock_intr_errno(*timeo);
876 if (signal_pending(current))
881 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
883 finish_wait(sk->sk_sleep, &wait);
886 sk->sk_socket->state = SS_CONNECTED;
887 } else if (scp->state != DN_CI && scp->state != DN_CC) {
888 sk->sk_socket->state = SS_UNCONNECTED;
893 static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
895 struct socket *sock = sk->sk_socket;
896 struct dn_scp *scp = DN_SK(sk);
900 if (sock->state == SS_CONNECTED)
903 if (sock->state == SS_CONNECTING) {
905 if (scp->state == DN_RUN) {
906 sock->state = SS_CONNECTED;
910 if (scp->state != DN_CI && scp->state != DN_CC) {
911 sock->state = SS_UNCONNECTED;
914 return dn_wait_run(sk, timeo);
918 if (scp->state != DN_O)
921 if (addr == NULL || addrlen != sizeof(struct sockaddr_dn))
923 if (addr->sdn_family != AF_DECnet)
925 if (addr->sdn_flags & SDF_WILD)
928 if (sock_flag(sk, SOCK_ZAPPED)) {
929 err = dn_auto_bind(sk->sk_socket);
934 memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn));
937 memset(&fl, 0, sizeof(fl));
938 fl.oif = sk->sk_bound_dev_if;
939 fl.fld_dst = dn_saddr2dn(&scp->peer);
940 fl.fld_src = dn_saddr2dn(&scp->addr);
941 dn_sk_ports_copy(&fl, scp);
942 fl.proto = DNPROTO_NSP;
943 if (dn_route_output_sock(&sk->sk_dst_cache, &fl, sk, flags) < 0)
945 sk->sk_route_caps = sk->sk_dst_cache->dev->features;
946 sock->state = SS_CONNECTING;
948 scp->segsize_loc = dst_metric(sk->sk_dst_cache, RTAX_ADVMSS);
950 dn_nsp_send_conninit(sk, NSP_CI);
953 err = dn_wait_run(sk, timeo);
959 static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags)
961 struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr;
962 struct sock *sk = sock->sk;
964 long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
967 err = __dn_connect(sk, addr, addrlen, &timeo, 0);
973 static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
975 struct dn_scp *scp = DN_SK(sk);
981 return dn_confirm_accept(sk, timeo, sk->sk_allocation);
984 return dn_wait_run(sk, timeo);
986 return __dn_connect(sk, addr, addrlen, timeo, flags);
993 static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc)
995 unsigned char *ptr = skb->data;
997 acc->acc_userl = *ptr++;
998 memcpy(&acc->acc_user, ptr, acc->acc_userl);
999 ptr += acc->acc_userl;
1001 acc->acc_passl = *ptr++;
1002 memcpy(&acc->acc_pass, ptr, acc->acc_passl);
1003 ptr += acc->acc_passl;
1005 acc->acc_accl = *ptr++;
1006 memcpy(&acc->acc_acc, ptr, acc->acc_accl);
1008 skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3);
1012 static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt)
1014 unsigned char *ptr = skb->data;
1016 opt->opt_optl = *ptr++;
1017 opt->opt_status = 0;
1018 memcpy(opt->opt_data, ptr, opt->opt_optl);
1019 skb_pull(skb, opt->opt_optl + 1);
1023 static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo)
1026 struct sk_buff *skb = NULL;
1029 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1032 skb = skb_dequeue(&sk->sk_receive_queue);
1034 *timeo = schedule_timeout(*timeo);
1035 skb = skb_dequeue(&sk->sk_receive_queue);
1041 if (sk->sk_state != TCP_LISTEN)
1043 err = sock_intr_errno(*timeo);
1044 if (signal_pending(current))
1049 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1051 finish_wait(sk->sk_sleep, &wait);
1053 return skb == NULL ? ERR_PTR(err) : skb;
1056 static int dn_accept(struct socket *sock, struct socket *newsock, int flags)
1058 struct sock *sk = sock->sk, *newsk;
1059 struct sk_buff *skb = NULL;
1060 struct dn_skb_cb *cb;
1061 unsigned char menuver;
1064 long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
1068 if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) {
1073 skb = skb_dequeue(&sk->sk_receive_queue);
1075 skb = dn_wait_for_connect(sk, &timeo);
1078 return PTR_ERR(skb);
1082 cb = DN_SKB_CB(skb);
1083 sk->sk_ack_backlog--;
1084 newsk = dn_alloc_sock(newsock, sk->sk_allocation);
1085 if (newsk == NULL) {
1092 dst_release(xchg(&newsk->sk_dst_cache, skb->dst));
1095 DN_SK(newsk)->state = DN_CR;
1096 DN_SK(newsk)->addrrem = cb->src_port;
1097 DN_SK(newsk)->services_rem = cb->services;
1098 DN_SK(newsk)->info_rem = cb->info;
1099 DN_SK(newsk)->segsize_rem = cb->segsize;
1100 DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode;
1102 if (DN_SK(newsk)->segsize_rem < 230)
1103 DN_SK(newsk)->segsize_rem = 230;
1105 if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
1106 DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd;
1108 newsk->sk_state = TCP_LISTEN;
1109 memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn));
1112 * If we are listening on a wild socket, we don't want
1113 * the newly created socket on the wrong hash queue.
1115 DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD;
1117 skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type));
1118 skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type));
1119 *(dn_address *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src;
1120 *(dn_address *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst;
1122 menuver = *skb->data;
1125 if (menuver & DN_MENUVER_ACC)
1126 dn_access_copy(skb, &(DN_SK(newsk)->accessdata));
1128 if (menuver & DN_MENUVER_USR)
1129 dn_user_copy(skb, &(DN_SK(newsk)->conndata_in));
1131 if (menuver & DN_MENUVER_PRX)
1132 DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY;
1134 if (menuver & DN_MENUVER_UIC)
1135 DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY;
1139 memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out),
1140 sizeof(struct optdata_dn));
1141 memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out),
1142 sizeof(struct optdata_dn));
1145 err = dn_hash_sock(newsk);
1147 sock_reset_flag(newsk, SOCK_ZAPPED);
1148 dn_send_conn_ack(newsk);
1151 * Here we use sk->sk_allocation since although the conn conf is
1152 * for the newsk, the context is the old socket.
1154 if (DN_SK(newsk)->accept_mode == ACC_IMMED)
1155 err = dn_confirm_accept(newsk, &timeo,
1158 release_sock(newsk);
1163 static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int *uaddr_len,int peer)
1165 struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr;
1166 struct sock *sk = sock->sk;
1167 struct dn_scp *scp = DN_SK(sk);
1169 *uaddr_len = sizeof(struct sockaddr_dn);
1174 if ((sock->state != SS_CONNECTED &&
1175 sock->state != SS_CONNECTING) &&
1176 scp->accept_mode == ACC_IMMED)
1179 memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn));
1181 memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn));
1190 static unsigned int dn_poll(struct file *file, struct socket *sock, poll_table *wait)
1192 struct sock *sk = sock->sk;
1193 struct dn_scp *scp = DN_SK(sk);
1194 int mask = datagram_poll(file, sock, wait);
1196 if (!skb_queue_empty(&scp->other_receive_queue))
1202 static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1204 struct sock *sk = sock->sk;
1205 struct dn_scp *scp = DN_SK(sk);
1206 int err = -EOPNOTSUPP;
1208 struct sk_buff *skb;
1215 return dn_dev_ioctl(cmd, (void __user *)arg);
1219 val = !skb_queue_empty(&scp->other_receive_queue);
1220 if (scp->state != DN_RUN)
1226 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1229 err = put_user(amount, (int __user *)arg);
1234 if ((skb = skb_peek(&scp->other_receive_queue)) != NULL) {
1237 struct sk_buff *skb = sk->sk_receive_queue.next;
1240 (struct sk_buff *)&sk->sk_receive_queue)
1247 err = put_user(amount, (int __user *)arg);
1251 err = dev_ioctl(cmd, (void __user *)arg);
1258 static int dn_listen(struct socket *sock, int backlog)
1260 struct sock *sk = sock->sk;
1265 if (sock_flag(sk, SOCK_ZAPPED))
1268 if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN))
1271 sk->sk_max_ack_backlog = backlog;
1272 sk->sk_ack_backlog = 0;
1273 sk->sk_state = TCP_LISTEN;
1284 static int dn_shutdown(struct socket *sock, int how)
1286 struct sock *sk = sock->sk;
1287 struct dn_scp *scp = DN_SK(sk);
1288 int err = -ENOTCONN;
1292 if (sock->state == SS_UNCONNECTED)
1296 if (sock->state == SS_DISCONNECTING)
1300 if (scp->state == DN_O)
1303 if (how != SHUTDOWN_MASK)
1306 sk->sk_shutdown = how;
1307 dn_destroy_sock(sk);
1316 static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
1318 struct sock *sk = sock->sk;
1322 err = __dn_setsockopt(sock, level, optname, optval, optlen, 0);
1328 static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, int optlen, int flags)
1330 struct sock *sk = sock->sk;
1331 struct dn_scp *scp = DN_SK(sk);
1334 struct optdata_dn opt;
1335 struct accessdata_dn acc;
1339 unsigned char services;
1344 if (optlen && !optval)
1347 if (optlen > sizeof(u))
1350 if (copy_from_user(&u, optval, optlen))
1355 if (sock->state == SS_CONNECTED)
1357 if ((scp->state != DN_O) && (scp->state != DN_CR))
1360 if (optlen != sizeof(struct optdata_dn))
1363 if (u.opt.opt_optl > 16)
1366 memcpy(&scp->conndata_out, &u.opt, optlen);
1370 if (sock->state != SS_CONNECTED && scp->accept_mode == ACC_IMMED)
1373 if (optlen != sizeof(struct optdata_dn))
1376 if (u.opt.opt_optl > 16)
1379 memcpy(&scp->discdata_out, &u.opt, optlen);
1383 if (sock->state == SS_CONNECTED)
1385 if (scp->state != DN_O)
1388 if (optlen != sizeof(struct accessdata_dn))
1391 if ((u.acc.acc_accl > DN_MAXACCL) ||
1392 (u.acc.acc_passl > DN_MAXACCL) ||
1393 (u.acc.acc_userl > DN_MAXACCL))
1396 memcpy(&scp->accessdata, &u.acc, optlen);
1399 case DSO_ACCEPTMODE:
1400 if (sock->state == SS_CONNECTED)
1402 if (scp->state != DN_O)
1405 if (optlen != sizeof(int))
1408 if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER))
1411 scp->accept_mode = (unsigned char)u.mode;
1416 if (scp->state != DN_CR)
1418 timeo = sock_rcvtimeo(sk, 0);
1419 err = dn_confirm_accept(sk, &timeo, sk->sk_allocation);
1424 if (scp->state != DN_CR)
1428 sk->sk_shutdown = SHUTDOWN_MASK;
1429 dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation);
1433 #ifdef CONFIG_NETFILTER
1434 return nf_setsockopt(sk, PF_DECnet, optname, optval, optlen);
1439 return -ENOPROTOOPT;
1442 if (optlen != sizeof(unsigned long))
1444 if (u.win > NSP_MAX_WINDOW)
1445 u.win = NSP_MAX_WINDOW;
1448 scp->max_window = u.win;
1449 if (scp->snd_window > u.win)
1450 scp->snd_window = u.win;
1454 if (optlen != sizeof(int))
1456 if (scp->nonagle == 2)
1458 scp->nonagle = (u.val == 0) ? 0 : 1;
1459 /* if (scp->nonagle == 1) { Push pending frames } */
1463 if (optlen != sizeof(int))
1465 if (scp->nonagle == 1)
1467 scp->nonagle = (u.val == 0) ? 0 : 2;
1468 /* if (scp->nonagle == 0) { Push pending frames } */
1472 if (optlen != sizeof(unsigned char))
1474 if ((u.services & ~NSP_FC_MASK) != 0x01)
1476 if ((u.services & NSP_FC_MASK) == NSP_FC_MASK)
1478 scp->services_loc = u.services;
1482 if (optlen != sizeof(unsigned char))
1486 scp->info_loc = u.info;
1493 static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
1495 struct sock *sk = sock->sk;
1499 err = __dn_getsockopt(sock, level, optname, optval, optlen, 0);
1505 static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags)
1507 struct sock *sk = sock->sk;
1508 struct dn_scp *scp = DN_SK(sk);
1509 struct linkinfo_dn link;
1511 void *r_data = NULL;
1514 if(get_user(r_len , optlen))
1519 if (r_len > sizeof(struct optdata_dn))
1520 r_len = sizeof(struct optdata_dn);
1521 r_data = &scp->conndata_in;
1525 if (r_len > sizeof(struct optdata_dn))
1526 r_len = sizeof(struct optdata_dn);
1527 r_data = &scp->discdata_in;
1531 if (r_len > sizeof(struct accessdata_dn))
1532 r_len = sizeof(struct accessdata_dn);
1533 r_data = &scp->accessdata;
1536 case DSO_ACCEPTMODE:
1537 if (r_len > sizeof(unsigned char))
1538 r_len = sizeof(unsigned char);
1539 r_data = &scp->accept_mode;
1543 if (r_len > sizeof(struct linkinfo_dn))
1544 r_len = sizeof(struct linkinfo_dn);
1546 switch(sock->state) {
1548 link.idn_linkstate = LL_CONNECTING;
1550 case SS_DISCONNECTING:
1551 link.idn_linkstate = LL_DISCONNECTING;
1554 link.idn_linkstate = LL_RUNNING;
1557 link.idn_linkstate = LL_INACTIVE;
1560 link.idn_segsize = scp->segsize_rem;
1565 #ifdef CONFIG_NETFILTER
1569 if(get_user(len, optlen))
1572 val = nf_getsockopt(sk, PF_DECnet, optname,
1575 val = put_user(len, optlen);
1583 return -ENOPROTOOPT;
1586 if (r_len > sizeof(unsigned long))
1587 r_len = sizeof(unsigned long);
1588 r_data = &scp->max_window;
1592 if (r_len > sizeof(int))
1593 r_len = sizeof(int);
1594 val = (scp->nonagle == 1);
1599 if (r_len > sizeof(int))
1600 r_len = sizeof(int);
1601 val = (scp->nonagle == 2);
1606 if (r_len > sizeof(unsigned char))
1607 r_len = sizeof(unsigned char);
1608 r_data = &scp->services_rem;
1612 if (r_len > sizeof(unsigned char))
1613 r_len = sizeof(unsigned char);
1614 r_data = &scp->info_rem;
1619 if (copy_to_user(optval, r_data, r_len))
1621 if (put_user(r_len, optlen))
1629 static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target)
1631 struct sk_buff *skb = q->next;
1634 if (flags & MSG_OOB)
1635 return !skb_queue_empty(q) ? 1 : 0;
1637 while(skb != (struct sk_buff *)q) {
1638 struct dn_skb_cb *cb = DN_SKB_CB(skb);
1641 if (cb->nsp_flags & 0x40) {
1642 /* SOCK_SEQPACKET reads to EOM */
1643 if (sk->sk_type == SOCK_SEQPACKET)
1645 /* so does SOCK_STREAM unless WAITALL is specified */
1646 if (!(flags & MSG_WAITALL))
1650 /* minimum data length for read exceeded */
1661 static int dn_recvmsg(struct kiocb *iocb, struct socket *sock,
1662 struct msghdr *msg, size_t size, int flags)
1664 struct sock *sk = sock->sk;
1665 struct dn_scp *scp = DN_SK(sk);
1666 struct sk_buff_head *queue = &sk->sk_receive_queue;
1667 size_t target = size > 1 ? 1 : 0;
1670 struct sk_buff *skb, *nskb;
1671 struct dn_skb_cb *cb = NULL;
1672 unsigned char eor = 0;
1673 long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1677 if (sock_flag(sk, SOCK_ZAPPED)) {
1678 rv = -EADDRNOTAVAIL;
1682 rv = dn_check_state(sk, NULL, 0, &timeo, flags);
1686 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1687 if (!(flags & MSG_NOSIGNAL))
1688 send_sig(SIGPIPE, current, 0);
1693 if (flags & ~(MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) {
1698 if (flags & MSG_OOB)
1699 queue = &scp->other_receive_queue;
1701 if (flags & MSG_WAITALL)
1706 * See if there is data ready to read, sleep if there isn't
1712 if (!skb_queue_empty(&scp->other_receive_queue)) {
1713 if (!(flags & MSG_OOB)) {
1714 msg->msg_flags |= MSG_OOB;
1715 if (!scp->other_report) {
1716 scp->other_report = 1;
1722 if (scp->state != DN_RUN)
1725 if (signal_pending(current)) {
1726 rv = sock_intr_errno(timeo);
1730 if (dn_data_ready(sk, queue, flags, target))
1733 if (flags & MSG_DONTWAIT) {
1738 set_bit(SOCK_ASYNC_WAITDATA, &sock->flags);
1741 if (!dn_data_ready(sk, queue, flags, target))
1745 clear_bit(SOCK_ASYNC_WAITDATA, &sock->flags);
1748 for(skb = queue->next; skb != (struct sk_buff *)queue; skb = nskb) {
1749 unsigned int chunk = skb->len;
1750 cb = DN_SKB_CB(skb);
1752 if ((chunk + copied) > size)
1753 chunk = size - copied;
1755 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1761 if (!(flags & MSG_PEEK))
1762 skb_pull(skb, chunk);
1764 eor = cb->nsp_flags & 0x40;
1767 if (skb->len == 0) {
1768 skb_unlink(skb, queue);
1771 * N.B. Don't refer to skb or cb after this point
1774 if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) {
1775 scp->flowloc_sw = DN_SEND;
1776 dn_nsp_send_link(sk, DN_SEND, 0);
1781 if (sk->sk_type == SOCK_SEQPACKET)
1783 if (!(flags & MSG_WAITALL))
1787 if (flags & MSG_OOB)
1790 if (copied >= target)
1797 if (eor && (sk->sk_type == SOCK_SEQPACKET))
1798 msg->msg_flags |= MSG_EOR;
1802 rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk);
1804 if ((rv >= 0) && msg->msg_name) {
1805 memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn));
1806 msg->msg_namelen = sizeof(struct sockaddr_dn);
1815 static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags)
1817 unsigned char fctype = scp->services_rem & NSP_FC_MASK;
1818 if (skb_queue_len(queue) >= scp->snd_window)
1820 if (fctype != NSP_FC_NONE) {
1821 if (flags & MSG_OOB) {
1822 if (scp->flowrem_oth == 0)
1825 if (scp->flowrem_dat == 0)
1833 * The DECnet spec requires the the "routing layer" accepts packets which
1834 * are at least 230 bytes in size. This excludes any headers which the NSP
1835 * layer might add, so we always assume that we'll be using the maximal
1836 * length header on data packets. The variation in length is due to the
1837 * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't
1838 * make much practical difference.
1840 unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu)
1842 unsigned mss = 230 - DN_MAX_NSP_DATA_HEADER;
1844 struct dn_dev *dn_db = dev->dn_ptr;
1845 mtu -= LL_RESERVED_SPACE(dev);
1846 if (dn_db->use_long)
1850 mtu -= DN_MAX_NSP_DATA_HEADER;
1853 * 21 = long header, 16 = guess at MAC header length
1855 mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16);
1862 static inline unsigned int dn_current_mss(struct sock *sk, int flags)
1864 struct dst_entry *dst = __sk_dst_get(sk);
1865 struct dn_scp *scp = DN_SK(sk);
1866 int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem);
1868 /* Other data messages are limited to 16 bytes per packet */
1869 if (flags & MSG_OOB)
1872 /* This works out the maximum size of segment we can send out */
1874 u32 mtu = dst_mtu(dst);
1875 mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now);
1882 * N.B. We get the timeout wrong here, but then we always did get it
1883 * wrong before and this is another step along the road to correcting
1884 * it. It ought to get updated each time we pass through the routine,
1885 * but in practise it probably doesn't matter too much for now.
1887 static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk,
1888 unsigned long datalen, int noblock,
1891 struct sk_buff *skb = sock_alloc_send_skb(sk, datalen,
1894 skb->protocol = __constant_htons(ETH_P_DNA_RT);
1895 skb->pkt_type = PACKET_OUTGOING;
1900 static int dn_sendmsg(struct kiocb *iocb, struct socket *sock,
1901 struct msghdr *msg, size_t size)
1903 struct sock *sk = sock->sk;
1904 struct dn_scp *scp = DN_SK(sk);
1906 struct sk_buff_head *queue = &scp->data_xmit_queue;
1907 int flags = msg->msg_flags;
1910 int addr_len = msg->msg_namelen;
1911 struct sockaddr_dn *addr = (struct sockaddr_dn *)msg->msg_name;
1912 struct sk_buff *skb = NULL;
1913 struct dn_skb_cb *cb;
1915 unsigned char fctype;
1918 if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT))
1921 if (addr_len && (addr_len != sizeof(struct sockaddr_dn)))
1925 timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
1927 * The only difference between stream sockets and sequenced packet
1928 * sockets is that the stream sockets always behave as if MSG_EOR
1931 if (sock->type == SOCK_STREAM) {
1932 if (flags & MSG_EOR) {
1940 err = dn_check_state(sk, addr, addr_len, &timeo, flags);
1944 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1949 if ((flags & MSG_TRYHARD) && sk->sk_dst_cache)
1950 dst_negative_advice(&sk->sk_dst_cache);
1952 mss = scp->segsize_rem;
1953 fctype = scp->services_rem & NSP_FC_MASK;
1955 mss = dn_current_mss(sk, flags);
1957 if (flags & MSG_OOB) {
1958 queue = &scp->other_xmit_queue;
1965 scp->persist_fxn = dn_nsp_xmit_timeout;
1967 while(sent < size) {
1968 err = sock_error(sk);
1972 if (signal_pending(current)) {
1973 err = sock_intr_errno(timeo);
1978 * Calculate size that we wish to send.
1986 * Wait for queue size to go down below the window
1989 if (dn_queue_too_long(scp, queue, flags)) {
1990 if (flags & MSG_DONTWAIT) {
1997 if (dn_queue_too_long(scp, queue, flags))
2006 * Get a suitably sized skb.
2007 * 64 is a bit of a hack really, but its larger than any
2008 * link-layer headers and has served us well as a good
2009 * guess as to their real length.
2011 skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER,
2012 flags & MSG_DONTWAIT, &err);
2020 cb = DN_SKB_CB(skb);
2022 skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER);
2024 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
2029 if (flags & MSG_OOB) {
2030 cb->nsp_flags = 0x30;
2031 if (fctype != NSP_FC_NONE)
2034 cb->nsp_flags = 0x00;
2035 if (scp->seg_total == 0)
2036 cb->nsp_flags |= 0x20;
2038 scp->seg_total += len;
2040 if (((sent + len) == size) && (flags & MSG_EOR)) {
2041 cb->nsp_flags |= 0x40;
2043 if (fctype == NSP_FC_SCMC)
2046 if (fctype == NSP_FC_SRC)
2051 dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB);
2054 scp->persist = dn_nsp_persist(sk);
2064 return sent ? sent : err;
2067 err = sk_stream_error(sk, flags, err);
2072 static int dn_device_event(struct notifier_block *this, unsigned long event,
2075 struct net_device *dev = (struct net_device *)ptr;
2091 static struct notifier_block dn_dev_notifier = {
2092 .notifier_call = dn_device_event,
2095 extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
2097 static struct packet_type dn_dix_packet_type = {
2098 .type = __constant_htons(ETH_P_DNA_RT),
2099 .dev = NULL, /* All devices */
2100 .func = dn_route_rcv,
2103 #ifdef CONFIG_PROC_FS
2104 struct dn_iter_state {
2108 static struct sock *dn_socket_get_first(struct seq_file *seq)
2110 struct dn_iter_state *state = seq->private;
2111 struct sock *n = NULL;
2113 for(state->bucket = 0;
2114 state->bucket < DN_SK_HASH_SIZE;
2116 n = sk_head(&dn_sk_hash[state->bucket]);
2124 static struct sock *dn_socket_get_next(struct seq_file *seq,
2127 struct dn_iter_state *state = seq->private;
2133 if (++state->bucket >= DN_SK_HASH_SIZE)
2135 n = sk_head(&dn_sk_hash[state->bucket]);
2141 static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos)
2143 struct sock *sk = dn_socket_get_first(seq);
2146 while(*pos && (sk = dn_socket_get_next(seq, sk)))
2149 return *pos ? NULL : sk;
2152 static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos)
2155 read_lock_bh(&dn_hash_lock);
2156 rc = socket_get_idx(seq, &pos);
2158 read_unlock_bh(&dn_hash_lock);
2163 static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos)
2165 return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2168 static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2172 if (v == SEQ_START_TOKEN) {
2173 rc = dn_socket_get_idx(seq, 0);
2177 rc = dn_socket_get_next(seq, v);
2180 read_unlock_bh(&dn_hash_lock);
2186 static void dn_socket_seq_stop(struct seq_file *seq, void *v)
2188 if (v && v != SEQ_START_TOKEN)
2189 read_unlock_bh(&dn_hash_lock);
2192 #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126)
2194 static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf)
2198 switch (dn_ntohs(dn->sdn_objnamel)) {
2200 sprintf(buf, "%d", dn->sdn_objnum);
2203 for (i = 0; i < dn_ntohs(dn->sdn_objnamel); i++) {
2204 buf[i] = dn->sdn_objname[i];
2205 if (IS_NOT_PRINTABLE(buf[i]))
2212 static char *dn_state2asc(unsigned char state)
2252 static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk)
2254 struct dn_scp *scp = DN_SK(sk);
2255 char buf1[DN_ASCBUF_LEN];
2256 char buf2[DN_ASCBUF_LEN];
2257 char local_object[DN_MAXOBJL+3];
2258 char remote_object[DN_MAXOBJL+3];
2260 dn_printable_object(&scp->addr, local_object);
2261 dn_printable_object(&scp->peer, remote_object);
2264 "%6s/%04X %04d:%04d %04d:%04d %01d %-16s "
2265 "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n",
2266 dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->addr)), buf1),
2274 dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->peer)), buf2),
2282 dn_state2asc(scp->state),
2283 ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER"));
2286 static int dn_socket_seq_show(struct seq_file *seq, void *v)
2288 if (v == SEQ_START_TOKEN) {
2289 seq_puts(seq, "Local Remote\n");
2291 dn_socket_format_entry(seq, v);
2296 static struct seq_operations dn_socket_seq_ops = {
2297 .start = dn_socket_seq_start,
2298 .next = dn_socket_seq_next,
2299 .stop = dn_socket_seq_stop,
2300 .show = dn_socket_seq_show,
2303 static int dn_socket_seq_open(struct inode *inode, struct file *file)
2305 struct seq_file *seq;
2307 struct dn_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2312 rc = seq_open(file, &dn_socket_seq_ops);
2316 seq = file->private_data;
2318 memset(s, 0, sizeof(*s));
2326 static struct file_operations dn_socket_seq_fops = {
2327 .owner = THIS_MODULE,
2328 .open = dn_socket_seq_open,
2330 .llseek = seq_lseek,
2331 .release = seq_release_private,
2335 static struct net_proto_family dn_family_ops = {
2336 .family = AF_DECnet,
2337 .create = dn_create,
2338 .owner = THIS_MODULE,
2341 static struct proto_ops dn_proto_ops = {
2342 .family = AF_DECnet,
2343 .owner = THIS_MODULE,
2344 .release = dn_release,
2346 .connect = dn_connect,
2347 .socketpair = sock_no_socketpair,
2348 .accept = dn_accept,
2349 .getname = dn_getname,
2352 .listen = dn_listen,
2353 .shutdown = dn_shutdown,
2354 .setsockopt = dn_setsockopt,
2355 .getsockopt = dn_getsockopt,
2356 .sendmsg = dn_sendmsg,
2357 .recvmsg = dn_recvmsg,
2358 .mmap = sock_no_mmap,
2359 .sendpage = sock_no_sendpage,
2362 void dn_register_sysctl(void);
2363 void dn_unregister_sysctl(void);
2365 MODULE_DESCRIPTION("The Linux DECnet Network Protocol");
2366 MODULE_AUTHOR("Linux DECnet Project Team");
2367 MODULE_LICENSE("GPL");
2368 MODULE_ALIAS_NETPROTO(PF_DECnet);
2370 static char banner[] __initdata = KERN_INFO "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n";
2372 static int __init decnet_init(void)
2378 rc = proto_register(&dn_proto, 1);
2387 sock_register(&dn_family_ops);
2388 dev_add_pack(&dn_dix_packet_type);
2389 register_netdevice_notifier(&dn_dev_notifier);
2391 proc_net_fops_create("decnet", S_IRUGO, &dn_socket_seq_fops);
2392 dn_register_sysctl();
2397 module_init(decnet_init);
2400 * Prevent DECnet module unloading until its fixed properly.
2401 * Requires an audit of the code to check for memory leaks and
2402 * initialisation problems etc.
2405 static void __exit decnet_exit(void)
2407 sock_unregister(AF_DECnet);
2408 dev_remove_pack(&dn_dix_packet_type);
2410 dn_unregister_sysctl();
2412 unregister_netdevice_notifier(&dn_dev_notifier);
2419 proc_net_remove("decnet");
2421 proto_unregister(&dn_proto);
2423 module_exit(decnet_exit);