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/module.h>
103 #include <linux/errno.h>
104 #include <linux/types.h>
105 #include <linux/slab.h>
106 #include <linux/socket.h>
107 #include <linux/in.h>
108 #include <linux/kernel.h>
109 #include <linux/sched.h>
110 #include <linux/timer.h>
111 #include <linux/string.h>
112 #include <linux/sockios.h>
113 #include <linux/net.h>
114 #include <linux/netdevice.h>
115 #include <linux/inet.h>
116 #include <linux/route.h>
117 #include <linux/netfilter.h>
118 #include <linux/seq_file.h>
119 #include <net/sock.h>
120 #include <net/tcp_states.h>
121 #include <net/flow.h>
122 #include <asm/system.h>
123 #include <asm/ioctls.h>
124 #include <linux/capability.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/net_namespace.h>
132 #include <net/neighbour.h>
134 #include <net/fib_rules.h>
136 #include <net/dn_nsp.h>
137 #include <net/dn_dev.h>
138 #include <net/dn_route.h>
139 #include <net/dn_fib.h>
140 #include <net/dn_neigh.h>
147 static void dn_keepalive(struct sock *sk);
149 #define DN_SK_HASH_SHIFT 8
150 #define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT)
151 #define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1)
154 static const struct proto_ops dn_proto_ops;
155 static DEFINE_RWLOCK(dn_hash_lock);
156 static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
157 static struct hlist_head dn_wild_sk;
158 static atomic_t decnet_memory_allocated;
160 static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen, int flags);
161 static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
163 static struct hlist_head *dn_find_list(struct sock *sk)
165 struct dn_scp *scp = DN_SK(sk);
167 if (scp->addr.sdn_flags & SDF_WILD)
168 return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL;
170 return &dn_sk_hash[dn_ntohs(scp->addrloc) & DN_SK_HASH_MASK];
174 * Valid ports are those greater than zero and not already in use.
176 static int check_port(__le16 port)
179 struct hlist_node *node;
184 sk_for_each(sk, node, &dn_sk_hash[dn_ntohs(port) & DN_SK_HASH_MASK]) {
185 struct dn_scp *scp = DN_SK(sk);
186 if (scp->addrloc == port)
192 static unsigned short port_alloc(struct sock *sk)
194 struct dn_scp *scp = DN_SK(sk);
195 static unsigned short port = 0x2000;
196 unsigned short i_port = port;
198 while(check_port(dn_htons(++port)) != 0) {
203 scp->addrloc = dn_htons(port);
209 * Since this is only ever called from user
210 * level, we don't need a write_lock() version
213 static int dn_hash_sock(struct sock *sk)
215 struct dn_scp *scp = DN_SK(sk);
216 struct hlist_head *list;
219 BUG_ON(sk_hashed(sk));
221 write_lock_bh(&dn_hash_lock);
223 if (!scp->addrloc && !port_alloc(sk))
227 if ((list = dn_find_list(sk)) == NULL)
230 sk_add_node(sk, list);
233 write_unlock_bh(&dn_hash_lock);
237 static void dn_unhash_sock(struct sock *sk)
239 write_lock(&dn_hash_lock);
240 sk_del_node_init(sk);
241 write_unlock(&dn_hash_lock);
244 static void dn_unhash_sock_bh(struct sock *sk)
246 write_lock_bh(&dn_hash_lock);
247 sk_del_node_init(sk);
248 write_unlock_bh(&dn_hash_lock);
251 static struct hlist_head *listen_hash(struct sockaddr_dn *addr)
254 unsigned hash = addr->sdn_objnum;
257 hash = addr->sdn_objnamel;
258 for(i = 0; i < dn_ntohs(addr->sdn_objnamel); i++) {
259 hash ^= addr->sdn_objname[i];
264 return &dn_sk_hash[hash & DN_SK_HASH_MASK];
268 * Called to transform a socket from bound (i.e. with a local address)
269 * into a listening socket (doesn't need a local port number) and rehashes
270 * based upon the object name/number.
272 static void dn_rehash_sock(struct sock *sk)
274 struct hlist_head *list;
275 struct dn_scp *scp = DN_SK(sk);
277 if (scp->addr.sdn_flags & SDF_WILD)
280 write_lock_bh(&dn_hash_lock);
281 sk_del_node_init(sk);
282 DN_SK(sk)->addrloc = 0;
283 list = listen_hash(&DN_SK(sk)->addr);
284 sk_add_node(sk, list);
285 write_unlock_bh(&dn_hash_lock);
288 int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type)
296 *buf++ = sdn->sdn_objnum;
300 *buf++ = dn_ntohs(sdn->sdn_objnamel);
301 memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel));
302 len = 3 + dn_ntohs(sdn->sdn_objnamel);
307 *buf++ = dn_ntohs(sdn->sdn_objnamel);
308 memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel));
309 len = 7 + dn_ntohs(sdn->sdn_objnamel);
317 * On reception of usernames, we handle types 1 and 0 for destination
318 * addresses only. Types 2 and 4 are used for source addresses, but the
319 * UIC, GIC are ignored and they are both treated the same way. Type 3
320 * is never used as I've no idea what its purpose might be or what its
323 int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt)
330 sdn->sdn_objnamel = dn_htons(0);
331 memset(sdn->sdn_objname, 0, DN_MAXOBJL);
342 sdn->sdn_objnum = type;
364 sdn->sdn_objnamel = dn_htons(*data++);
365 len -= dn_ntohs(sdn->sdn_objnamel);
367 if ((len < 0) || (dn_ntohs(sdn->sdn_objnamel) > namel))
370 memcpy(sdn->sdn_objname, data, dn_ntohs(sdn->sdn_objnamel));
375 struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr)
377 struct hlist_head *list = listen_hash(addr);
378 struct hlist_node *node;
381 read_lock(&dn_hash_lock);
382 sk_for_each(sk, node, list) {
383 struct dn_scp *scp = DN_SK(sk);
384 if (sk->sk_state != TCP_LISTEN)
386 if (scp->addr.sdn_objnum) {
387 if (scp->addr.sdn_objnum != addr->sdn_objnum)
390 if (addr->sdn_objnum)
392 if (scp->addr.sdn_objnamel != addr->sdn_objnamel)
394 if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, dn_ntohs(addr->sdn_objnamel)) != 0)
398 read_unlock(&dn_hash_lock);
402 sk = sk_head(&dn_wild_sk);
404 if (sk->sk_state == TCP_LISTEN)
410 read_unlock(&dn_hash_lock);
414 struct sock *dn_find_by_skb(struct sk_buff *skb)
416 struct dn_skb_cb *cb = DN_SKB_CB(skb);
418 struct hlist_node *node;
421 read_lock(&dn_hash_lock);
422 sk_for_each(sk, node, &dn_sk_hash[dn_ntohs(cb->dst_port) & DN_SK_HASH_MASK]) {
424 if (cb->src != dn_saddr2dn(&scp->peer))
426 if (cb->dst_port != scp->addrloc)
428 if (scp->addrrem && (cb->src_port != scp->addrrem))
435 read_unlock(&dn_hash_lock);
441 static void dn_destruct(struct sock *sk)
443 struct dn_scp *scp = DN_SK(sk);
445 skb_queue_purge(&scp->data_xmit_queue);
446 skb_queue_purge(&scp->other_xmit_queue);
447 skb_queue_purge(&scp->other_receive_queue);
449 dst_release(xchg(&sk->sk_dst_cache, NULL));
452 static int dn_memory_pressure;
454 static void dn_enter_memory_pressure(void)
456 if (!dn_memory_pressure) {
457 dn_memory_pressure = 1;
461 static struct proto dn_proto = {
463 .owner = THIS_MODULE,
464 .enter_memory_pressure = dn_enter_memory_pressure,
465 .memory_pressure = &dn_memory_pressure,
466 .memory_allocated = &decnet_memory_allocated,
467 .sysctl_mem = sysctl_decnet_mem,
468 .sysctl_wmem = sysctl_decnet_wmem,
469 .sysctl_rmem = sysctl_decnet_rmem,
470 .max_header = DN_MAX_NSP_DATA_HEADER + 64,
471 .obj_size = sizeof(struct dn_sock),
474 static struct sock *dn_alloc_sock(struct socket *sock, gfp_t gfp)
477 struct sock *sk = sk_alloc(PF_DECnet, gfp, &dn_proto, 1);
483 sock->ops = &dn_proto_ops;
484 sock_init_data(sock, sk);
486 sk->sk_backlog_rcv = dn_nsp_backlog_rcv;
487 sk->sk_destruct = dn_destruct;
489 sk->sk_family = PF_DECnet;
491 sk->sk_allocation = gfp;
492 sk->sk_sndbuf = sysctl_decnet_wmem[1];
493 sk->sk_rcvbuf = sysctl_decnet_rmem[1];
495 /* Initialization of DECnet Session Control Port */
497 scp->state = DN_O; /* Open */
498 scp->numdat = 1; /* Next data seg to tx */
499 scp->numoth = 1; /* Next oth data to tx */
500 scp->ackxmt_dat = 0; /* Last data seg ack'ed */
501 scp->ackxmt_oth = 0; /* Last oth data ack'ed */
502 scp->ackrcv_dat = 0; /* Highest data ack recv*/
503 scp->ackrcv_oth = 0; /* Last oth data ack rec*/
504 scp->flowrem_sw = DN_SEND;
505 scp->flowloc_sw = DN_SEND;
506 scp->flowrem_dat = 0;
507 scp->flowrem_oth = 1;
508 scp->flowloc_dat = 0;
509 scp->flowloc_oth = 1;
510 scp->services_rem = 0;
511 scp->services_loc = 1 | NSP_FC_NONE;
513 scp->info_loc = 0x03; /* NSP version 4.1 */
514 scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */
517 scp->accept_mode = ACC_IMMED;
518 scp->addr.sdn_family = AF_DECnet;
519 scp->peer.sdn_family = AF_DECnet;
520 scp->accessdata.acc_accl = 5;
521 memcpy(scp->accessdata.acc_acc, "LINUX", 5);
523 scp->max_window = NSP_MAX_WINDOW;
524 scp->snd_window = NSP_MIN_WINDOW;
525 scp->nsp_srtt = NSP_INITIAL_SRTT;
526 scp->nsp_rttvar = NSP_INITIAL_RTTVAR;
527 scp->nsp_rxtshift = 0;
529 skb_queue_head_init(&scp->data_xmit_queue);
530 skb_queue_head_init(&scp->other_xmit_queue);
531 skb_queue_head_init(&scp->other_receive_queue);
534 scp->persist_fxn = NULL;
535 scp->keepalive = 10 * HZ;
536 scp->keepalive_fxn = dn_keepalive;
538 init_timer(&scp->delack_timer);
539 scp->delack_pending = 0;
540 scp->delack_fxn = dn_nsp_delayed_ack;
542 dn_start_slow_timer(sk);
549 * FIXME: Should respond to SO_KEEPALIVE etc.
551 static void dn_keepalive(struct sock *sk)
553 struct dn_scp *scp = DN_SK(sk);
556 * By checking the other_data transmit queue is empty
557 * we are double checking that we are not sending too
558 * many of these keepalive frames.
560 if (skb_queue_empty(&scp->other_xmit_queue))
561 dn_nsp_send_link(sk, DN_NOCHANGE, 0);
566 * Timer for shutdown/destroyed sockets.
567 * When socket is dead & no packets have been sent for a
568 * certain amount of time, they are removed by this
569 * routine. Also takes care of sending out DI & DC
570 * frames at correct times.
572 int dn_destroy_timer(struct sock *sk)
574 struct dn_scp *scp = DN_SK(sk);
576 scp->persist = dn_nsp_persist(sk);
580 dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
581 if (scp->nsp_rxtshift >= decnet_di_count)
586 dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
587 if (scp->nsp_rxtshift >= decnet_dr_count)
592 if (scp->nsp_rxtshift < decnet_dn_count) {
593 /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */
594 dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC);
599 scp->persist = (HZ * decnet_time_wait);
604 if ((jiffies - scp->stamp) >= (HZ * decnet_time_wait)) {
613 static void dn_destroy_sock(struct sock *sk)
615 struct dn_scp *scp = DN_SK(sk);
617 scp->nsp_rxtshift = 0; /* reset back off */
620 if (sk->sk_socket->state != SS_UNCONNECTED)
621 sk->sk_socket->state = SS_DISCONNECTING;
624 sk->sk_state = TCP_CLOSE;
628 dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
630 scp->persist_fxn = dn_destroy_timer;
631 scp->persist = dn_nsp_persist(sk);
641 dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation);
650 scp->persist_fxn = dn_destroy_timer;
651 scp->persist = dn_nsp_persist(sk);
654 printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n");
656 dn_stop_slow_timer(sk);
658 dn_unhash_sock_bh(sk);
665 char *dn_addr2asc(__u16 addr, char *buf)
667 unsigned short node, area;
669 node = addr & 0x03ff;
671 sprintf(buf, "%hd.%hd", area, node);
678 static int dn_create(struct socket *sock, int protocol)
684 if (protocol != DNPROTO_NSP)
685 return -EPROTONOSUPPORT;
690 return -ESOCKTNOSUPPORT;
694 if ((sk = dn_alloc_sock(sock, GFP_KERNEL)) == NULL)
697 sk->sk_protocol = protocol;
704 dn_release(struct socket *sock)
706 struct sock *sk = sock->sk;
720 static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
722 struct sock *sk = sock->sk;
723 struct dn_scp *scp = DN_SK(sk);
724 struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr;
725 struct net_device *dev, *ldev;
728 if (addr_len != sizeof(struct sockaddr_dn))
731 if (saddr->sdn_family != AF_DECnet)
734 if (dn_ntohs(saddr->sdn_nodeaddrl) && (dn_ntohs(saddr->sdn_nodeaddrl) != 2))
737 if (dn_ntohs(saddr->sdn_objnamel) > DN_MAXOBJL)
740 if (saddr->sdn_flags & ~SDF_WILD)
743 if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum ||
744 (saddr->sdn_flags & SDF_WILD)))
747 if (!(saddr->sdn_flags & SDF_WILD)) {
748 if (dn_ntohs(saddr->sdn_nodeaddrl)) {
749 read_lock(&dev_base_lock);
751 for_each_netdev(dev) {
754 if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) {
759 read_unlock(&dev_base_lock);
761 return -EADDRNOTAVAIL;
767 if (sock_flag(sk, SOCK_ZAPPED)) {
768 memcpy(&scp->addr, saddr, addr_len);
769 sock_reset_flag(sk, SOCK_ZAPPED);
771 rv = dn_hash_sock(sk);
773 sock_set_flag(sk, SOCK_ZAPPED);
781 static int dn_auto_bind(struct socket *sock)
783 struct sock *sk = sock->sk;
784 struct dn_scp *scp = DN_SK(sk);
787 sock_reset_flag(sk, SOCK_ZAPPED);
789 scp->addr.sdn_flags = 0;
790 scp->addr.sdn_objnum = 0;
793 * This stuff is to keep compatibility with Eduardo's
794 * patch. I hope I can dispense with it shortly...
796 if ((scp->accessdata.acc_accl != 0) &&
797 (scp->accessdata.acc_accl <= 12)) {
799 scp->addr.sdn_objnamel = dn_htons(scp->accessdata.acc_accl);
800 memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, dn_ntohs(scp->addr.sdn_objnamel));
802 scp->accessdata.acc_accl = 0;
803 memset(scp->accessdata.acc_acc, 0, 40);
805 /* End of compatibility stuff */
807 scp->addr.sdn_add.a_len = dn_htons(2);
808 rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr);
810 rv = dn_hash_sock(sk);
812 sock_set_flag(sk, SOCK_ZAPPED);
818 static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation)
820 struct dn_scp *scp = DN_SK(sk);
824 if (scp->state != DN_CR)
828 scp->segsize_loc = dst_metric(__sk_dst_get(sk), RTAX_ADVMSS);
829 dn_send_conn_conf(sk, allocation);
831 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
834 if (scp->state == DN_CC)
835 *timeo = schedule_timeout(*timeo);
838 if (scp->state == DN_RUN)
840 err = sock_error(sk);
843 err = sock_intr_errno(*timeo);
844 if (signal_pending(current))
849 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
851 finish_wait(sk->sk_sleep, &wait);
853 sk->sk_socket->state = SS_CONNECTED;
854 } else if (scp->state != DN_CC) {
855 sk->sk_socket->state = SS_UNCONNECTED;
860 static int dn_wait_run(struct sock *sk, long *timeo)
862 struct dn_scp *scp = DN_SK(sk);
866 if (scp->state == DN_RUN)
872 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
875 if (scp->state == DN_CI || scp->state == DN_CC)
876 *timeo = schedule_timeout(*timeo);
879 if (scp->state == DN_RUN)
881 err = sock_error(sk);
884 err = sock_intr_errno(*timeo);
885 if (signal_pending(current))
890 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
892 finish_wait(sk->sk_sleep, &wait);
895 sk->sk_socket->state = SS_CONNECTED;
896 } else if (scp->state != DN_CI && scp->state != DN_CC) {
897 sk->sk_socket->state = SS_UNCONNECTED;
902 static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
904 struct socket *sock = sk->sk_socket;
905 struct dn_scp *scp = DN_SK(sk);
909 if (sock->state == SS_CONNECTED)
912 if (sock->state == SS_CONNECTING) {
914 if (scp->state == DN_RUN) {
915 sock->state = SS_CONNECTED;
919 if (scp->state != DN_CI && scp->state != DN_CC) {
920 sock->state = SS_UNCONNECTED;
923 return dn_wait_run(sk, timeo);
927 if (scp->state != DN_O)
930 if (addr == NULL || addrlen != sizeof(struct sockaddr_dn))
932 if (addr->sdn_family != AF_DECnet)
934 if (addr->sdn_flags & SDF_WILD)
937 if (sock_flag(sk, SOCK_ZAPPED)) {
938 err = dn_auto_bind(sk->sk_socket);
943 memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn));
946 memset(&fl, 0, sizeof(fl));
947 fl.oif = sk->sk_bound_dev_if;
948 fl.fld_dst = dn_saddr2dn(&scp->peer);
949 fl.fld_src = dn_saddr2dn(&scp->addr);
950 dn_sk_ports_copy(&fl, scp);
951 fl.proto = DNPROTO_NSP;
952 if (dn_route_output_sock(&sk->sk_dst_cache, &fl, sk, flags) < 0)
954 sk->sk_route_caps = sk->sk_dst_cache->dev->features;
955 sock->state = SS_CONNECTING;
957 scp->segsize_loc = dst_metric(sk->sk_dst_cache, RTAX_ADVMSS);
959 dn_nsp_send_conninit(sk, NSP_CI);
962 err = dn_wait_run(sk, timeo);
968 static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags)
970 struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr;
971 struct sock *sk = sock->sk;
973 long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
976 err = __dn_connect(sk, addr, addrlen, &timeo, 0);
982 static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
984 struct dn_scp *scp = DN_SK(sk);
990 return dn_confirm_accept(sk, timeo, sk->sk_allocation);
993 return dn_wait_run(sk, timeo);
995 return __dn_connect(sk, addr, addrlen, timeo, flags);
1002 static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc)
1004 unsigned char *ptr = skb->data;
1006 acc->acc_userl = *ptr++;
1007 memcpy(&acc->acc_user, ptr, acc->acc_userl);
1008 ptr += acc->acc_userl;
1010 acc->acc_passl = *ptr++;
1011 memcpy(&acc->acc_pass, ptr, acc->acc_passl);
1012 ptr += acc->acc_passl;
1014 acc->acc_accl = *ptr++;
1015 memcpy(&acc->acc_acc, ptr, acc->acc_accl);
1017 skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3);
1021 static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt)
1023 unsigned char *ptr = skb->data;
1024 u16 len = *ptr++; /* yes, it's 8bit on the wire */
1026 BUG_ON(len > 16); /* we've checked the contents earlier */
1027 opt->opt_optl = dn_htons(len);
1028 opt->opt_status = 0;
1029 memcpy(opt->opt_data, ptr, len);
1030 skb_pull(skb, len + 1);
1033 static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo)
1036 struct sk_buff *skb = NULL;
1039 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1042 skb = skb_dequeue(&sk->sk_receive_queue);
1044 *timeo = schedule_timeout(*timeo);
1045 skb = skb_dequeue(&sk->sk_receive_queue);
1051 if (sk->sk_state != TCP_LISTEN)
1053 err = sock_intr_errno(*timeo);
1054 if (signal_pending(current))
1059 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1061 finish_wait(sk->sk_sleep, &wait);
1063 return skb == NULL ? ERR_PTR(err) : skb;
1066 static int dn_accept(struct socket *sock, struct socket *newsock, int flags)
1068 struct sock *sk = sock->sk, *newsk;
1069 struct sk_buff *skb = NULL;
1070 struct dn_skb_cb *cb;
1071 unsigned char menuver;
1074 long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
1078 if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) {
1083 skb = skb_dequeue(&sk->sk_receive_queue);
1085 skb = dn_wait_for_connect(sk, &timeo);
1088 return PTR_ERR(skb);
1092 cb = DN_SKB_CB(skb);
1093 sk->sk_ack_backlog--;
1094 newsk = dn_alloc_sock(newsock, sk->sk_allocation);
1095 if (newsk == NULL) {
1102 dst_release(xchg(&newsk->sk_dst_cache, skb->dst));
1105 DN_SK(newsk)->state = DN_CR;
1106 DN_SK(newsk)->addrrem = cb->src_port;
1107 DN_SK(newsk)->services_rem = cb->services;
1108 DN_SK(newsk)->info_rem = cb->info;
1109 DN_SK(newsk)->segsize_rem = cb->segsize;
1110 DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode;
1112 if (DN_SK(newsk)->segsize_rem < 230)
1113 DN_SK(newsk)->segsize_rem = 230;
1115 if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
1116 DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd;
1118 newsk->sk_state = TCP_LISTEN;
1119 memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn));
1122 * If we are listening on a wild socket, we don't want
1123 * the newly created socket on the wrong hash queue.
1125 DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD;
1127 skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type));
1128 skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type));
1129 *(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src;
1130 *(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst;
1132 menuver = *skb->data;
1135 if (menuver & DN_MENUVER_ACC)
1136 dn_access_copy(skb, &(DN_SK(newsk)->accessdata));
1138 if (menuver & DN_MENUVER_USR)
1139 dn_user_copy(skb, &(DN_SK(newsk)->conndata_in));
1141 if (menuver & DN_MENUVER_PRX)
1142 DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY;
1144 if (menuver & DN_MENUVER_UIC)
1145 DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY;
1149 memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out),
1150 sizeof(struct optdata_dn));
1151 memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out),
1152 sizeof(struct optdata_dn));
1155 err = dn_hash_sock(newsk);
1157 sock_reset_flag(newsk, SOCK_ZAPPED);
1158 dn_send_conn_ack(newsk);
1161 * Here we use sk->sk_allocation since although the conn conf is
1162 * for the newsk, the context is the old socket.
1164 if (DN_SK(newsk)->accept_mode == ACC_IMMED)
1165 err = dn_confirm_accept(newsk, &timeo,
1168 release_sock(newsk);
1173 static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int *uaddr_len,int peer)
1175 struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr;
1176 struct sock *sk = sock->sk;
1177 struct dn_scp *scp = DN_SK(sk);
1179 *uaddr_len = sizeof(struct sockaddr_dn);
1184 if ((sock->state != SS_CONNECTED &&
1185 sock->state != SS_CONNECTING) &&
1186 scp->accept_mode == ACC_IMMED) {
1191 memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn));
1193 memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn));
1202 static unsigned int dn_poll(struct file *file, struct socket *sock, poll_table *wait)
1204 struct sock *sk = sock->sk;
1205 struct dn_scp *scp = DN_SK(sk);
1206 int mask = datagram_poll(file, sock, wait);
1208 if (!skb_queue_empty(&scp->other_receive_queue))
1214 static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1216 struct sock *sk = sock->sk;
1217 struct dn_scp *scp = DN_SK(sk);
1218 int err = -EOPNOTSUPP;
1220 struct sk_buff *skb;
1227 return dn_dev_ioctl(cmd, (void __user *)arg);
1231 val = !skb_queue_empty(&scp->other_receive_queue);
1232 if (scp->state != DN_RUN)
1238 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1241 err = put_user(amount, (int __user *)arg);
1246 if ((skb = skb_peek(&scp->other_receive_queue)) != NULL) {
1249 struct sk_buff *skb = sk->sk_receive_queue.next;
1252 (struct sk_buff *)&sk->sk_receive_queue)
1259 err = put_user(amount, (int __user *)arg);
1270 static int dn_listen(struct socket *sock, int backlog)
1272 struct sock *sk = sock->sk;
1277 if (sock_flag(sk, SOCK_ZAPPED))
1280 if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN))
1283 sk->sk_max_ack_backlog = backlog;
1284 sk->sk_ack_backlog = 0;
1285 sk->sk_state = TCP_LISTEN;
1296 static int dn_shutdown(struct socket *sock, int how)
1298 struct sock *sk = sock->sk;
1299 struct dn_scp *scp = DN_SK(sk);
1300 int err = -ENOTCONN;
1304 if (sock->state == SS_UNCONNECTED)
1308 if (sock->state == SS_DISCONNECTING)
1312 if (scp->state == DN_O)
1315 if (how != SHUTDOWN_MASK)
1318 sk->sk_shutdown = how;
1319 dn_destroy_sock(sk);
1328 static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
1330 struct sock *sk = sock->sk;
1334 err = __dn_setsockopt(sock, level, optname, optval, optlen, 0);
1340 static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, int optlen, int flags)
1342 struct sock *sk = sock->sk;
1343 struct dn_scp *scp = DN_SK(sk);
1346 struct optdata_dn opt;
1347 struct accessdata_dn acc;
1351 unsigned char services;
1356 if (optlen && !optval)
1359 if (optlen > sizeof(u))
1362 if (copy_from_user(&u, optval, optlen))
1367 if (sock->state == SS_CONNECTED)
1369 if ((scp->state != DN_O) && (scp->state != DN_CR))
1372 if (optlen != sizeof(struct optdata_dn))
1375 if (dn_ntohs(u.opt.opt_optl) > 16)
1378 memcpy(&scp->conndata_out, &u.opt, optlen);
1382 if (sock->state != SS_CONNECTED && scp->accept_mode == ACC_IMMED)
1385 if (optlen != sizeof(struct optdata_dn))
1388 if (dn_ntohs(u.opt.opt_optl) > 16)
1391 memcpy(&scp->discdata_out, &u.opt, optlen);
1395 if (sock->state == SS_CONNECTED)
1397 if (scp->state != DN_O)
1400 if (optlen != sizeof(struct accessdata_dn))
1403 if ((u.acc.acc_accl > DN_MAXACCL) ||
1404 (u.acc.acc_passl > DN_MAXACCL) ||
1405 (u.acc.acc_userl > DN_MAXACCL))
1408 memcpy(&scp->accessdata, &u.acc, optlen);
1411 case DSO_ACCEPTMODE:
1412 if (sock->state == SS_CONNECTED)
1414 if (scp->state != DN_O)
1417 if (optlen != sizeof(int))
1420 if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER))
1423 scp->accept_mode = (unsigned char)u.mode;
1428 if (scp->state != DN_CR)
1430 timeo = sock_rcvtimeo(sk, 0);
1431 err = dn_confirm_accept(sk, &timeo, sk->sk_allocation);
1436 if (scp->state != DN_CR)
1440 sk->sk_shutdown = SHUTDOWN_MASK;
1441 dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation);
1445 #ifdef CONFIG_NETFILTER
1446 return nf_setsockopt(sk, PF_DECnet, optname, optval, optlen);
1451 return -ENOPROTOOPT;
1454 if (optlen != sizeof(unsigned long))
1456 if (u.win > NSP_MAX_WINDOW)
1457 u.win = NSP_MAX_WINDOW;
1460 scp->max_window = u.win;
1461 if (scp->snd_window > u.win)
1462 scp->snd_window = u.win;
1466 if (optlen != sizeof(int))
1468 if (scp->nonagle == 2)
1470 scp->nonagle = (u.val == 0) ? 0 : 1;
1471 /* if (scp->nonagle == 1) { Push pending frames } */
1475 if (optlen != sizeof(int))
1477 if (scp->nonagle == 1)
1479 scp->nonagle = (u.val == 0) ? 0 : 2;
1480 /* if (scp->nonagle == 0) { Push pending frames } */
1484 if (optlen != sizeof(unsigned char))
1486 if ((u.services & ~NSP_FC_MASK) != 0x01)
1488 if ((u.services & NSP_FC_MASK) == NSP_FC_MASK)
1490 scp->services_loc = u.services;
1494 if (optlen != sizeof(unsigned char))
1498 scp->info_loc = u.info;
1505 static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
1507 struct sock *sk = sock->sk;
1511 err = __dn_getsockopt(sock, level, optname, optval, optlen, 0);
1517 static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags)
1519 struct sock *sk = sock->sk;
1520 struct dn_scp *scp = DN_SK(sk);
1521 struct linkinfo_dn link;
1523 void *r_data = NULL;
1526 if(get_user(r_len , optlen))
1531 if (r_len > sizeof(struct optdata_dn))
1532 r_len = sizeof(struct optdata_dn);
1533 r_data = &scp->conndata_in;
1537 if (r_len > sizeof(struct optdata_dn))
1538 r_len = sizeof(struct optdata_dn);
1539 r_data = &scp->discdata_in;
1543 if (r_len > sizeof(struct accessdata_dn))
1544 r_len = sizeof(struct accessdata_dn);
1545 r_data = &scp->accessdata;
1548 case DSO_ACCEPTMODE:
1549 if (r_len > sizeof(unsigned char))
1550 r_len = sizeof(unsigned char);
1551 r_data = &scp->accept_mode;
1555 if (r_len > sizeof(struct linkinfo_dn))
1556 r_len = sizeof(struct linkinfo_dn);
1558 switch(sock->state) {
1560 link.idn_linkstate = LL_CONNECTING;
1562 case SS_DISCONNECTING:
1563 link.idn_linkstate = LL_DISCONNECTING;
1566 link.idn_linkstate = LL_RUNNING;
1569 link.idn_linkstate = LL_INACTIVE;
1572 link.idn_segsize = scp->segsize_rem;
1577 #ifdef CONFIG_NETFILTER
1581 if(get_user(len, optlen))
1584 val = nf_getsockopt(sk, PF_DECnet, optname,
1587 val = put_user(len, optlen);
1595 return -ENOPROTOOPT;
1598 if (r_len > sizeof(unsigned long))
1599 r_len = sizeof(unsigned long);
1600 r_data = &scp->max_window;
1604 if (r_len > sizeof(int))
1605 r_len = sizeof(int);
1606 val = (scp->nonagle == 1);
1611 if (r_len > sizeof(int))
1612 r_len = sizeof(int);
1613 val = (scp->nonagle == 2);
1618 if (r_len > sizeof(unsigned char))
1619 r_len = sizeof(unsigned char);
1620 r_data = &scp->services_rem;
1624 if (r_len > sizeof(unsigned char))
1625 r_len = sizeof(unsigned char);
1626 r_data = &scp->info_rem;
1631 if (copy_to_user(optval, r_data, r_len))
1633 if (put_user(r_len, optlen))
1641 static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target)
1643 struct sk_buff *skb = q->next;
1646 if (flags & MSG_OOB)
1647 return !skb_queue_empty(q) ? 1 : 0;
1649 while(skb != (struct sk_buff *)q) {
1650 struct dn_skb_cb *cb = DN_SKB_CB(skb);
1653 if (cb->nsp_flags & 0x40) {
1654 /* SOCK_SEQPACKET reads to EOM */
1655 if (sk->sk_type == SOCK_SEQPACKET)
1657 /* so does SOCK_STREAM unless WAITALL is specified */
1658 if (!(flags & MSG_WAITALL))
1662 /* minimum data length for read exceeded */
1673 static int dn_recvmsg(struct kiocb *iocb, struct socket *sock,
1674 struct msghdr *msg, size_t size, int flags)
1676 struct sock *sk = sock->sk;
1677 struct dn_scp *scp = DN_SK(sk);
1678 struct sk_buff_head *queue = &sk->sk_receive_queue;
1679 size_t target = size > 1 ? 1 : 0;
1682 struct sk_buff *skb, *nskb;
1683 struct dn_skb_cb *cb = NULL;
1684 unsigned char eor = 0;
1685 long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1689 if (sock_flag(sk, SOCK_ZAPPED)) {
1690 rv = -EADDRNOTAVAIL;
1694 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1699 rv = dn_check_state(sk, NULL, 0, &timeo, flags);
1703 if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) {
1708 if (flags & MSG_OOB)
1709 queue = &scp->other_receive_queue;
1711 if (flags & MSG_WAITALL)
1716 * See if there is data ready to read, sleep if there isn't
1722 if (!skb_queue_empty(&scp->other_receive_queue)) {
1723 if (!(flags & MSG_OOB)) {
1724 msg->msg_flags |= MSG_OOB;
1725 if (!scp->other_report) {
1726 scp->other_report = 1;
1732 if (scp->state != DN_RUN)
1735 if (signal_pending(current)) {
1736 rv = sock_intr_errno(timeo);
1740 if (dn_data_ready(sk, queue, flags, target))
1743 if (flags & MSG_DONTWAIT) {
1748 set_bit(SOCK_ASYNC_WAITDATA, &sock->flags);
1751 if (!dn_data_ready(sk, queue, flags, target))
1755 clear_bit(SOCK_ASYNC_WAITDATA, &sock->flags);
1758 for(skb = queue->next; skb != (struct sk_buff *)queue; skb = nskb) {
1759 unsigned int chunk = skb->len;
1760 cb = DN_SKB_CB(skb);
1762 if ((chunk + copied) > size)
1763 chunk = size - copied;
1765 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1771 if (!(flags & MSG_PEEK))
1772 skb_pull(skb, chunk);
1774 eor = cb->nsp_flags & 0x40;
1777 if (skb->len == 0) {
1778 skb_unlink(skb, queue);
1781 * N.B. Don't refer to skb or cb after this point
1784 if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) {
1785 scp->flowloc_sw = DN_SEND;
1786 dn_nsp_send_link(sk, DN_SEND, 0);
1791 if (sk->sk_type == SOCK_SEQPACKET)
1793 if (!(flags & MSG_WAITALL))
1797 if (flags & MSG_OOB)
1800 if (copied >= target)
1807 if (eor && (sk->sk_type == SOCK_SEQPACKET))
1808 msg->msg_flags |= MSG_EOR;
1812 rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk);
1814 if ((rv >= 0) && msg->msg_name) {
1815 memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn));
1816 msg->msg_namelen = sizeof(struct sockaddr_dn);
1825 static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags)
1827 unsigned char fctype = scp->services_rem & NSP_FC_MASK;
1828 if (skb_queue_len(queue) >= scp->snd_window)
1830 if (fctype != NSP_FC_NONE) {
1831 if (flags & MSG_OOB) {
1832 if (scp->flowrem_oth == 0)
1835 if (scp->flowrem_dat == 0)
1843 * The DECnet spec requires that the "routing layer" accepts packets which
1844 * are at least 230 bytes in size. This excludes any headers which the NSP
1845 * layer might add, so we always assume that we'll be using the maximal
1846 * length header on data packets. The variation in length is due to the
1847 * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't
1848 * make much practical difference.
1850 unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu)
1852 unsigned mss = 230 - DN_MAX_NSP_DATA_HEADER;
1854 struct dn_dev *dn_db = dev->dn_ptr;
1855 mtu -= LL_RESERVED_SPACE(dev);
1856 if (dn_db->use_long)
1860 mtu -= DN_MAX_NSP_DATA_HEADER;
1863 * 21 = long header, 16 = guess at MAC header length
1865 mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16);
1872 static inline unsigned int dn_current_mss(struct sock *sk, int flags)
1874 struct dst_entry *dst = __sk_dst_get(sk);
1875 struct dn_scp *scp = DN_SK(sk);
1876 int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem);
1878 /* Other data messages are limited to 16 bytes per packet */
1879 if (flags & MSG_OOB)
1882 /* This works out the maximum size of segment we can send out */
1884 u32 mtu = dst_mtu(dst);
1885 mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now);
1892 * N.B. We get the timeout wrong here, but then we always did get it
1893 * wrong before and this is another step along the road to correcting
1894 * it. It ought to get updated each time we pass through the routine,
1895 * but in practise it probably doesn't matter too much for now.
1897 static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk,
1898 unsigned long datalen, int noblock,
1901 struct sk_buff *skb = sock_alloc_send_skb(sk, datalen,
1904 skb->protocol = __constant_htons(ETH_P_DNA_RT);
1905 skb->pkt_type = PACKET_OUTGOING;
1910 static int dn_sendmsg(struct kiocb *iocb, struct socket *sock,
1911 struct msghdr *msg, size_t size)
1913 struct sock *sk = sock->sk;
1914 struct dn_scp *scp = DN_SK(sk);
1916 struct sk_buff_head *queue = &scp->data_xmit_queue;
1917 int flags = msg->msg_flags;
1920 int addr_len = msg->msg_namelen;
1921 struct sockaddr_dn *addr = (struct sockaddr_dn *)msg->msg_name;
1922 struct sk_buff *skb = NULL;
1923 struct dn_skb_cb *cb;
1925 unsigned char fctype;
1928 if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT))
1931 if (addr_len && (addr_len != sizeof(struct sockaddr_dn)))
1935 timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
1937 * The only difference between stream sockets and sequenced packet
1938 * sockets is that the stream sockets always behave as if MSG_EOR
1941 if (sock->type == SOCK_STREAM) {
1942 if (flags & MSG_EOR) {
1950 err = dn_check_state(sk, addr, addr_len, &timeo, flags);
1954 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1956 if (!(flags & MSG_NOSIGNAL))
1957 send_sig(SIGPIPE, current, 0);
1961 if ((flags & MSG_TRYHARD) && sk->sk_dst_cache)
1962 dst_negative_advice(&sk->sk_dst_cache);
1964 mss = scp->segsize_rem;
1965 fctype = scp->services_rem & NSP_FC_MASK;
1967 mss = dn_current_mss(sk, flags);
1969 if (flags & MSG_OOB) {
1970 queue = &scp->other_xmit_queue;
1977 scp->persist_fxn = dn_nsp_xmit_timeout;
1979 while(sent < size) {
1980 err = sock_error(sk);
1984 if (signal_pending(current)) {
1985 err = sock_intr_errno(timeo);
1990 * Calculate size that we wish to send.
1998 * Wait for queue size to go down below the window
2001 if (dn_queue_too_long(scp, queue, flags)) {
2002 if (flags & MSG_DONTWAIT) {
2009 if (dn_queue_too_long(scp, queue, flags))
2018 * Get a suitably sized skb.
2019 * 64 is a bit of a hack really, but its larger than any
2020 * link-layer headers and has served us well as a good
2021 * guess as to their real length.
2023 skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER,
2024 flags & MSG_DONTWAIT, &err);
2032 cb = DN_SKB_CB(skb);
2034 skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER);
2036 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
2041 if (flags & MSG_OOB) {
2042 cb->nsp_flags = 0x30;
2043 if (fctype != NSP_FC_NONE)
2046 cb->nsp_flags = 0x00;
2047 if (scp->seg_total == 0)
2048 cb->nsp_flags |= 0x20;
2050 scp->seg_total += len;
2052 if (((sent + len) == size) && (flags & MSG_EOR)) {
2053 cb->nsp_flags |= 0x40;
2055 if (fctype == NSP_FC_SCMC)
2058 if (fctype == NSP_FC_SRC)
2063 dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB);
2066 scp->persist = dn_nsp_persist(sk);
2076 return sent ? sent : err;
2079 err = sk_stream_error(sk, flags, err);
2084 static int dn_device_event(struct notifier_block *this, unsigned long event,
2087 struct net_device *dev = (struct net_device *)ptr;
2103 static struct notifier_block dn_dev_notifier = {
2104 .notifier_call = dn_device_event,
2107 extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
2109 static struct packet_type dn_dix_packet_type = {
2110 .type = __constant_htons(ETH_P_DNA_RT),
2111 .dev = NULL, /* All devices */
2112 .func = dn_route_rcv,
2115 #ifdef CONFIG_PROC_FS
2116 struct dn_iter_state {
2120 static struct sock *dn_socket_get_first(struct seq_file *seq)
2122 struct dn_iter_state *state = seq->private;
2123 struct sock *n = NULL;
2125 for(state->bucket = 0;
2126 state->bucket < DN_SK_HASH_SIZE;
2128 n = sk_head(&dn_sk_hash[state->bucket]);
2136 static struct sock *dn_socket_get_next(struct seq_file *seq,
2139 struct dn_iter_state *state = seq->private;
2145 if (++state->bucket >= DN_SK_HASH_SIZE)
2147 n = sk_head(&dn_sk_hash[state->bucket]);
2153 static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos)
2155 struct sock *sk = dn_socket_get_first(seq);
2158 while(*pos && (sk = dn_socket_get_next(seq, sk)))
2161 return *pos ? NULL : sk;
2164 static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos)
2167 read_lock_bh(&dn_hash_lock);
2168 rc = socket_get_idx(seq, &pos);
2170 read_unlock_bh(&dn_hash_lock);
2175 static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos)
2177 return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2180 static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2184 if (v == SEQ_START_TOKEN) {
2185 rc = dn_socket_get_idx(seq, 0);
2189 rc = dn_socket_get_next(seq, v);
2192 read_unlock_bh(&dn_hash_lock);
2198 static void dn_socket_seq_stop(struct seq_file *seq, void *v)
2200 if (v && v != SEQ_START_TOKEN)
2201 read_unlock_bh(&dn_hash_lock);
2204 #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126)
2206 static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf)
2210 switch (dn_ntohs(dn->sdn_objnamel)) {
2212 sprintf(buf, "%d", dn->sdn_objnum);
2215 for (i = 0; i < dn_ntohs(dn->sdn_objnamel); i++) {
2216 buf[i] = dn->sdn_objname[i];
2217 if (IS_NOT_PRINTABLE(buf[i]))
2224 static char *dn_state2asc(unsigned char state)
2264 static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk)
2266 struct dn_scp *scp = DN_SK(sk);
2267 char buf1[DN_ASCBUF_LEN];
2268 char buf2[DN_ASCBUF_LEN];
2269 char local_object[DN_MAXOBJL+3];
2270 char remote_object[DN_MAXOBJL+3];
2272 dn_printable_object(&scp->addr, local_object);
2273 dn_printable_object(&scp->peer, remote_object);
2276 "%6s/%04X %04d:%04d %04d:%04d %01d %-16s "
2277 "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n",
2278 dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->addr)), buf1),
2286 dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->peer)), buf2),
2294 dn_state2asc(scp->state),
2295 ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER"));
2298 static int dn_socket_seq_show(struct seq_file *seq, void *v)
2300 if (v == SEQ_START_TOKEN) {
2301 seq_puts(seq, "Local Remote\n");
2303 dn_socket_format_entry(seq, v);
2308 static const struct seq_operations dn_socket_seq_ops = {
2309 .start = dn_socket_seq_start,
2310 .next = dn_socket_seq_next,
2311 .stop = dn_socket_seq_stop,
2312 .show = dn_socket_seq_show,
2315 static int dn_socket_seq_open(struct inode *inode, struct file *file)
2317 struct seq_file *seq;
2319 struct dn_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2324 rc = seq_open(file, &dn_socket_seq_ops);
2328 seq = file->private_data;
2330 memset(s, 0, sizeof(*s));
2338 static const struct file_operations dn_socket_seq_fops = {
2339 .owner = THIS_MODULE,
2340 .open = dn_socket_seq_open,
2342 .llseek = seq_lseek,
2343 .release = seq_release_private,
2347 static struct net_proto_family dn_family_ops = {
2348 .family = AF_DECnet,
2349 .create = dn_create,
2350 .owner = THIS_MODULE,
2353 static const struct proto_ops dn_proto_ops = {
2354 .family = AF_DECnet,
2355 .owner = THIS_MODULE,
2356 .release = dn_release,
2358 .connect = dn_connect,
2359 .socketpair = sock_no_socketpair,
2360 .accept = dn_accept,
2361 .getname = dn_getname,
2364 .listen = dn_listen,
2365 .shutdown = dn_shutdown,
2366 .setsockopt = dn_setsockopt,
2367 .getsockopt = dn_getsockopt,
2368 .sendmsg = dn_sendmsg,
2369 .recvmsg = dn_recvmsg,
2370 .mmap = sock_no_mmap,
2371 .sendpage = sock_no_sendpage,
2374 void dn_register_sysctl(void);
2375 void dn_unregister_sysctl(void);
2377 MODULE_DESCRIPTION("The Linux DECnet Network Protocol");
2378 MODULE_AUTHOR("Linux DECnet Project Team");
2379 MODULE_LICENSE("GPL");
2380 MODULE_ALIAS_NETPROTO(PF_DECnet);
2382 static char banner[] __initdata = KERN_INFO "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n";
2384 static int __init decnet_init(void)
2390 rc = proto_register(&dn_proto, 1);
2399 sock_register(&dn_family_ops);
2400 dev_add_pack(&dn_dix_packet_type);
2401 register_netdevice_notifier(&dn_dev_notifier);
2403 proc_net_fops_create(&init_net, "decnet", S_IRUGO, &dn_socket_seq_fops);
2404 dn_register_sysctl();
2409 module_init(decnet_init);
2412 * Prevent DECnet module unloading until its fixed properly.
2413 * Requires an audit of the code to check for memory leaks and
2414 * initialisation problems etc.
2417 static void __exit decnet_exit(void)
2419 sock_unregister(AF_DECnet);
2420 rtnl_unregister_all(PF_DECnet);
2421 dev_remove_pack(&dn_dix_packet_type);
2423 dn_unregister_sysctl();
2425 unregister_netdevice_notifier(&dn_dev_notifier);
2432 proc_net_remove(&init_net, "decnet");
2434 proto_unregister(&dn_proto);
2436 module_exit(decnet_exit);