2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/errno.h>
16 #include <linux/types.h>
17 #include <linux/socket.h>
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/spinlock.h>
22 #include <linux/timer.h>
23 #include <linux/string.h>
24 #include <linux/sockios.h>
25 #include <linux/net.h>
26 #include <linux/stat.h>
28 #include <linux/inet.h>
29 #include <linux/netdevice.h>
30 #include <linux/if_arp.h>
31 #include <linux/skbuff.h>
33 #include <asm/system.h>
34 #include <asm/uaccess.h>
35 #include <linux/fcntl.h>
36 #include <linux/termios.h>
38 #include <linux/interrupt.h>
39 #include <linux/notifier.h>
41 #include <linux/proc_fs.h>
42 #include <linux/seq_file.h>
47 static int rose_ndevs = 10;
49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
50 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
51 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
52 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
53 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
54 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
55 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
56 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
57 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
58 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
60 HLIST_HEAD(rose_list);
61 spinlock_t rose_list_lock = SPIN_LOCK_UNLOCKED;
63 static struct proto_ops rose_proto_ops;
65 ax25_address rose_callsign;
68 * Convert a ROSE address into text.
70 const char *rose2asc(const rose_address *addr)
72 static char buffer[11];
74 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
75 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
76 addr->rose_addr[4] == 0x00) {
79 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
80 addr->rose_addr[1] & 0xFF,
81 addr->rose_addr[2] & 0xFF,
82 addr->rose_addr[3] & 0xFF,
83 addr->rose_addr[4] & 0xFF);
90 * Compare two ROSE addresses, 0 == equal.
92 int rosecmp(rose_address *addr1, rose_address *addr2)
96 for (i = 0; i < 5; i++)
97 if (addr1->rose_addr[i] != addr2->rose_addr[i])
104 * Compare two ROSE addresses for only mask digits, 0 == equal.
106 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
113 for (i = 0; i < mask; i++) {
117 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
120 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
128 static struct sock *rose_alloc_sock(void)
131 struct sock *sk = sk_alloc(PF_ROSE, GFP_ATOMIC, 1, NULL);
136 rose = sk->sk_protinfo = kmalloc(sizeof(*rose), GFP_ATOMIC);
140 memset(rose, 0x00, sizeof(*rose));
151 * Socket removal during an interrupt is now safe.
153 static void rose_remove_socket(struct sock *sk)
155 spin_lock_bh(&rose_list_lock);
156 sk_del_node_init(sk);
157 spin_unlock_bh(&rose_list_lock);
161 * Kill all bound sockets on a broken link layer connection to a
162 * particular neighbour.
164 void rose_kill_by_neigh(struct rose_neigh *neigh)
167 struct hlist_node *node;
169 spin_lock_bh(&rose_list_lock);
170 sk_for_each(s, node, &rose_list) {
171 rose_cb *rose = rose_sk(s);
173 if (rose->neighbour == neigh) {
174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175 rose->neighbour->use--;
176 rose->neighbour = NULL;
179 spin_unlock_bh(&rose_list_lock);
183 * Kill all bound sockets on a dropped device.
185 static void rose_kill_by_device(struct net_device *dev)
188 struct hlist_node *node;
190 spin_lock_bh(&rose_list_lock);
191 sk_for_each(s, node, &rose_list) {
192 rose_cb *rose = rose_sk(s);
194 if (rose->device == dev) {
195 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
196 rose->neighbour->use--;
200 spin_unlock_bh(&rose_list_lock);
204 * Handle device status changes.
206 static int rose_device_event(struct notifier_block *this, unsigned long event,
209 struct net_device *dev = (struct net_device *)ptr;
211 if (event != NETDEV_DOWN)
216 rose_kill_by_device(dev);
219 rose_link_device_down(dev);
220 rose_rt_device_down(dev);
228 * Add a socket to the bound sockets list.
230 static void rose_insert_socket(struct sock *sk)
233 spin_lock_bh(&rose_list_lock);
234 sk_add_node(sk, &rose_list);
235 spin_unlock_bh(&rose_list_lock);
239 * Find a socket that wants to accept the Call Request we just
242 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
245 struct hlist_node *node;
247 spin_lock_bh(&rose_list_lock);
248 sk_for_each(s, node, &rose_list) {
249 rose_cb *rose = rose_sk(s);
251 if (!rosecmp(&rose->source_addr, addr) &&
252 !ax25cmp(&rose->source_call, call) &&
253 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
257 sk_for_each(s, node, &rose_list) {
258 rose_cb *rose = rose_sk(s);
260 if (!rosecmp(&rose->source_addr, addr) &&
261 !ax25cmp(&rose->source_call, &null_ax25_address) &&
262 s->sk_state == TCP_LISTEN)
267 spin_unlock_bh(&rose_list_lock);
272 * Find a connected ROSE socket given my LCI and device.
274 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
277 struct hlist_node *node;
279 spin_lock_bh(&rose_list_lock);
280 sk_for_each(s, node, &rose_list) {
281 rose_cb *rose = rose_sk(s);
283 if (rose->lci == lci && rose->neighbour == neigh)
288 spin_unlock_bh(&rose_list_lock);
293 * Find a unique LCI for a given device.
295 unsigned int rose_new_lci(struct rose_neigh *neigh)
299 if (neigh->dce_mode) {
300 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
301 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
304 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
305 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
315 void rose_destroy_socket(struct sock *);
318 * Handler for deferred kills.
320 static void rose_destroy_timer(unsigned long data)
322 rose_destroy_socket((struct sock *)data);
326 * This is called from user mode and the timers. Thus it protects itself
327 * against interrupt users but doesn't worry about being called during
328 * work. Once it is removed from the queue no interrupt or bottom half
329 * will touch it and we are (fairly 8-) ) safe.
331 void rose_destroy_socket(struct sock *sk)
335 rose_remove_socket(sk);
336 rose_stop_heartbeat(sk);
337 rose_stop_idletimer(sk);
340 rose_clear_queues(sk); /* Flush the queues */
342 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
343 if (skb->sk != sk) { /* A pending connection */
344 /* Queue the unaccepted socket for death */
345 sock_set_flag(skb->sk, SOCK_DEAD);
346 rose_start_heartbeat(skb->sk);
347 rose_sk(skb->sk)->state = ROSE_STATE_0;
353 if (atomic_read(&sk->sk_wmem_alloc) ||
354 atomic_read(&sk->sk_rmem_alloc)) {
355 /* Defer: outstanding buffers */
356 init_timer(&sk->sk_timer);
357 sk->sk_timer.expires = jiffies + 10 * HZ;
358 sk->sk_timer.function = rose_destroy_timer;
359 sk->sk_timer.data = (unsigned long)sk;
360 add_timer(&sk->sk_timer);
366 * Handling for system calls applied via the various interfaces to a
367 * ROSE socket object.
370 static int rose_setsockopt(struct socket *sock, int level, int optname,
371 char __user *optval, int optlen)
373 struct sock *sk = sock->sk;
374 rose_cb *rose = rose_sk(sk);
377 if (level != SOL_ROSE)
380 if (optlen < sizeof(int))
383 if (get_user(opt, (int __user *)optval))
388 rose->defer = opt ? 1 : 0;
418 rose->idle = opt * 60 * HZ;
422 rose->qbitincl = opt ? 1 : 0;
430 static int rose_getsockopt(struct socket *sock, int level, int optname,
431 char __user *optval, int __user *optlen)
433 struct sock *sk = sock->sk;
434 rose_cb *rose = rose_sk(sk);
438 if (level != SOL_ROSE)
441 if (get_user(len, optlen))
469 val = rose->idle / (60 * HZ);
473 val = rose->qbitincl;
480 len = min_t(unsigned int, len, sizeof(int));
482 if (put_user(len, optlen))
485 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
488 static int rose_listen(struct socket *sock, int backlog)
490 struct sock *sk = sock->sk;
492 if (sk->sk_state != TCP_LISTEN) {
493 rose_cb *rose = rose_sk(sk);
495 rose->dest_ndigis = 0;
496 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
497 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
498 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
499 sk->sk_max_ack_backlog = backlog;
500 sk->sk_state = TCP_LISTEN;
507 static int rose_create(struct socket *sock, int protocol)
512 if (sock->type != SOCK_SEQPACKET || protocol != 0)
513 return -ESOCKTNOSUPPORT;
515 if ((sk = rose_alloc_sock()) == NULL)
520 sock_init_data(sock, sk);
521 sk_set_owner(sk, THIS_MODULE);
523 skb_queue_head_init(&rose->ack_queue);
525 skb_queue_head_init(&rose->frag_queue);
529 sock->ops = &rose_proto_ops;
530 sk->sk_protocol = protocol;
532 init_timer(&rose->timer);
533 init_timer(&rose->idletimer);
535 rose->t1 = sysctl_rose_call_request_timeout;
536 rose->t2 = sysctl_rose_reset_request_timeout;
537 rose->t3 = sysctl_rose_clear_request_timeout;
538 rose->hb = sysctl_rose_ack_hold_back_timeout;
539 rose->idle = sysctl_rose_no_activity_timeout;
541 rose->state = ROSE_STATE_0;
546 static struct sock *rose_make_new(struct sock *osk)
549 rose_cb *rose, *orose;
551 if (osk->sk_type != SOCK_SEQPACKET)
554 if ((sk = rose_alloc_sock()) == NULL)
559 sock_init_data(NULL, sk);
560 sk_set_owner(sk, THIS_MODULE);
562 skb_queue_head_init(&rose->ack_queue);
564 skb_queue_head_init(&rose->frag_queue);
568 sk->sk_type = osk->sk_type;
569 sk->sk_socket = osk->sk_socket;
570 sk->sk_priority = osk->sk_priority;
571 sk->sk_protocol = osk->sk_protocol;
572 sk->sk_rcvbuf = osk->sk_rcvbuf;
573 sk->sk_sndbuf = osk->sk_sndbuf;
574 sk->sk_debug = osk->sk_debug;
575 sk->sk_state = TCP_ESTABLISHED;
576 sk->sk_sleep = osk->sk_sleep;
577 sk->sk_zapped = osk->sk_zapped;
579 init_timer(&rose->timer);
580 init_timer(&rose->idletimer);
582 orose = rose_sk(osk);
583 rose->t1 = orose->t1;
584 rose->t2 = orose->t2;
585 rose->t3 = orose->t3;
586 rose->hb = orose->hb;
587 rose->idle = orose->idle;
588 rose->defer = orose->defer;
589 rose->device = orose->device;
590 rose->qbitincl = orose->qbitincl;
595 static int rose_release(struct socket *sock)
597 struct sock *sk = sock->sk;
600 if (sk == NULL) return 0;
604 switch (rose->state) {
606 rose_disconnect(sk, 0, -1, -1);
607 rose_destroy_socket(sk);
611 rose->neighbour->use--;
612 rose_disconnect(sk, 0, -1, -1);
613 rose_destroy_socket(sk);
620 rose_clear_queues(sk);
621 rose_stop_idletimer(sk);
622 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
623 rose_start_t3timer(sk);
624 rose->state = ROSE_STATE_2;
625 sk->sk_state = TCP_CLOSE;
626 sk->sk_shutdown |= SEND_SHUTDOWN;
627 sk->sk_state_change(sk);
628 sock_set_flag(sk, SOCK_DEAD);
629 sock_set_flag(sk, SOCK_DESTROY);
641 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
643 struct sock *sk = sock->sk;
644 rose_cb *rose = rose_sk(sk);
645 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
646 struct net_device *dev;
647 ax25_address *user, *source;
653 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
656 if (addr->srose_family != AF_ROSE)
659 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
662 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
665 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
666 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
667 return -EADDRNOTAVAIL;
670 source = &addr->srose_call;
672 if ((user = ax25_findbyuid(current->euid)) == NULL) {
673 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
678 rose->source_addr = addr->srose_addr;
679 rose->source_call = *user;
681 rose->source_ndigis = addr->srose_ndigis;
683 if (addr_len == sizeof(struct full_sockaddr_rose)) {
684 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
685 for (n = 0 ; n < addr->srose_ndigis ; n++)
686 rose->source_digis[n] = full_addr->srose_digis[n];
688 if (rose->source_ndigis == 1) {
689 rose->source_digis[0] = addr->srose_digi;
693 rose_insert_socket(sk);
696 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
700 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
702 struct sock *sk = sock->sk;
703 rose_cb *rose = rose_sk(sk);
704 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
705 unsigned char cause, diagnostic;
707 struct net_device *dev;
710 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
711 sock->state = SS_CONNECTED;
712 return 0; /* Connect completed during a ERESTARTSYS event */
715 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
716 sock->state = SS_UNCONNECTED;
717 return -ECONNREFUSED;
720 if (sk->sk_state == TCP_ESTABLISHED)
721 return -EISCONN; /* No reconnect on a seqpacket socket */
723 sk->sk_state = TCP_CLOSE;
724 sock->state = SS_UNCONNECTED;
726 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
729 if (addr->srose_family != AF_ROSE)
732 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
735 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
738 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
739 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
742 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
744 if (!rose->neighbour)
747 rose->lci = rose_new_lci(rose->neighbour);
751 if (sk->sk_zapped) { /* Must bind first - autobinding in this may or may not work */
754 if ((dev = rose_dev_first()) == NULL)
757 if ((user = ax25_findbyuid(current->euid)) == NULL)
760 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
761 rose->source_call = *user;
764 rose_insert_socket(sk); /* Finish the bind */
767 rose->dest_addr = addr->srose_addr;
768 rose->dest_call = addr->srose_call;
769 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
770 rose->dest_ndigis = addr->srose_ndigis;
772 if (addr_len == sizeof(struct full_sockaddr_rose)) {
773 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
774 for (n = 0 ; n < addr->srose_ndigis ; n++)
775 rose->dest_digis[n] = full_addr->srose_digis[n];
777 if (rose->dest_ndigis == 1) {
778 rose->dest_digis[0] = addr->srose_digi;
782 /* Move to connecting socket, start sending Connect Requests */
783 sock->state = SS_CONNECTING;
784 sk->sk_state = TCP_SYN_SENT;
786 rose->state = ROSE_STATE_1;
788 rose->neighbour->use++;
790 rose_write_internal(sk, ROSE_CALL_REQUEST);
791 rose_start_heartbeat(sk);
792 rose_start_t1timer(sk);
795 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
799 * A Connect Ack with Choke or timeout or failed routing will go to
802 if (sk->sk_state == TCP_SYN_SENT) {
803 struct task_struct *tsk = current;
804 DECLARE_WAITQUEUE(wait, tsk);
806 add_wait_queue(sk->sk_sleep, &wait);
808 set_current_state(TASK_INTERRUPTIBLE);
809 if (sk->sk_state != TCP_SYN_SENT)
811 if (!signal_pending(tsk)) {
815 current->state = TASK_RUNNING;
816 remove_wait_queue(sk->sk_sleep, &wait);
819 current->state = TASK_RUNNING;
820 remove_wait_queue(sk->sk_sleep, &wait);
823 if (sk->sk_state != TCP_ESTABLISHED) {
824 sock->state = SS_UNCONNECTED;
825 return sock_error(sk); /* Always set at this point */
828 sock->state = SS_CONNECTED;
833 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
835 struct task_struct *tsk = current;
836 DECLARE_WAITQUEUE(wait, tsk);
842 if ((sk = sock->sk) == NULL)
846 if (sk->sk_type != SOCK_SEQPACKET) {
851 if (sk->sk_state != TCP_LISTEN) {
857 * The write queue this time is holding sockets ready to use
858 * hooked into the SABM we saved
860 add_wait_queue(sk->sk_sleep, &wait);
862 skb = skb_dequeue(&sk->sk_receive_queue);
866 current->state = TASK_INTERRUPTIBLE;
868 if (flags & O_NONBLOCK) {
869 current->state = TASK_RUNNING;
870 remove_wait_queue(sk->sk_sleep, &wait);
873 if (!signal_pending(tsk)) {
880 current->state = TASK_RUNNING;
881 remove_wait_queue(sk->sk_sleep, &wait);
884 newsk->sk_pair = NULL;
885 newsk->sk_socket = newsock;
886 newsk->sk_sleep = &newsock->wait;
888 /* Now attach up the new socket */
891 sk->sk_ack_backlog--;
900 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
901 int *uaddr_len, int peer)
903 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
904 struct sock *sk = sock->sk;
905 rose_cb *rose = rose_sk(sk);
909 if (sk->sk_state != TCP_ESTABLISHED)
911 srose->srose_family = AF_ROSE;
912 srose->srose_addr = rose->dest_addr;
913 srose->srose_call = rose->dest_call;
914 srose->srose_ndigis = rose->dest_ndigis;
915 for (n = 0; n < rose->dest_ndigis; n++)
916 srose->srose_digis[n] = rose->dest_digis[n];
918 srose->srose_family = AF_ROSE;
919 srose->srose_addr = rose->source_addr;
920 srose->srose_call = rose->source_call;
921 srose->srose_ndigis = rose->source_ndigis;
922 for (n = 0; n < rose->source_ndigis; n++)
923 srose->srose_digis[n] = rose->source_digis[n];
926 *uaddr_len = sizeof(struct full_sockaddr_rose);
930 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
935 struct rose_facilities_struct facilities;
938 skb->sk = NULL; /* Initially we don't know who it's for */
941 * skb->data points to the rose frame start
943 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
945 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
946 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
947 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
948 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
952 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
955 * We can't accept the Call Request.
957 if (!sk || sk->sk_ack_backlog == sk->sk_max_ack_backlog ||
958 (make = rose_make_new(sk)) == NULL) {
959 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
964 make->sk_state = TCP_ESTABLISHED;
965 make_rose = rose_sk(make);
967 make_rose->lci = lci;
968 make_rose->dest_addr = facilities.dest_addr;
969 make_rose->dest_call = facilities.dest_call;
970 make_rose->dest_ndigis = facilities.dest_ndigis;
971 for (n = 0 ; n < facilities.dest_ndigis ; n++)
972 make_rose->dest_digis[n] = facilities.dest_digis[n];
973 make_rose->source_addr = facilities.source_addr;
974 make_rose->source_call = facilities.source_call;
975 make_rose->source_ndigis = facilities.source_ndigis;
976 for (n = 0 ; n < facilities.source_ndigis ; n++)
977 make_rose->source_digis[n]= facilities.source_digis[n];
978 make_rose->neighbour = neigh;
979 make_rose->device = dev;
980 make_rose->facilities = facilities;
982 make_rose->neighbour->use++;
984 if (rose_sk(sk)->defer) {
985 make_rose->state = ROSE_STATE_5;
987 rose_write_internal(make, ROSE_CALL_ACCEPTED);
988 make_rose->state = ROSE_STATE_3;
989 rose_start_idletimer(make);
992 make_rose->condition = 0x00;
997 sk->sk_ack_backlog++;
1000 rose_insert_socket(make);
1002 skb_queue_head(&sk->sk_receive_queue, skb);
1004 rose_start_heartbeat(make);
1006 if (!sock_flag(sk, SOCK_DEAD))
1007 sk->sk_data_ready(sk, skb->len);
1012 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1013 struct msghdr *msg, size_t len)
1015 struct sock *sk = sock->sk;
1016 rose_cb *rose = rose_sk(sk);
1017 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1019 struct full_sockaddr_rose srose;
1020 struct sk_buff *skb;
1021 unsigned char *asmptr;
1022 int n, size, qbit = 0;
1024 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR))
1028 return -EADDRNOTAVAIL;
1030 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1031 send_sig(SIGPIPE, current, 0);
1035 if (rose->neighbour == NULL || rose->device == NULL)
1036 return -ENETUNREACH;
1038 if (usrose != NULL) {
1039 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1041 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1042 memcpy(&srose, usrose, msg->msg_namelen);
1043 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1044 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1046 if (srose.srose_ndigis != rose->dest_ndigis)
1048 if (srose.srose_ndigis == rose->dest_ndigis) {
1049 for (n = 0 ; n < srose.srose_ndigis ; n++)
1050 if (ax25cmp(&rose->dest_digis[n],
1051 &srose.srose_digis[n]))
1054 if (srose.srose_family != AF_ROSE)
1057 if (sk->sk_state != TCP_ESTABLISHED)
1060 srose.srose_family = AF_ROSE;
1061 srose.srose_addr = rose->dest_addr;
1062 srose.srose_call = rose->dest_call;
1063 srose.srose_ndigis = rose->dest_ndigis;
1064 for (n = 0 ; n < rose->dest_ndigis ; n++)
1065 srose.srose_digis[n] = rose->dest_digis[n];
1068 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1070 /* Build a packet */
1071 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1072 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1074 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1077 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1080 * Put the data on the end
1082 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1084 asmptr = skb->h.raw = skb_put(skb, len);
1086 err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1093 * If the Q BIT Include socket option is in force, the first
1094 * byte of the user data is the logical value of the Q Bit.
1096 if (rose->qbitincl) {
1097 qbit = skb->data[0];
1102 * Push down the ROSE header
1104 asmptr = skb_push(skb, ROSE_MIN_LEN);
1106 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1108 /* Build a ROSE Network header */
1109 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1110 asmptr[1] = (rose->lci >> 0) & 0xFF;
1111 asmptr[2] = ROSE_DATA;
1114 asmptr[0] |= ROSE_Q_BIT;
1116 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1118 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1120 if (sk->sk_state != TCP_ESTABLISHED) {
1126 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1127 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1128 unsigned char header[ROSE_MIN_LEN];
1129 struct sk_buff *skbn;
1133 /* Save a copy of the Header */
1134 memcpy(header, skb->data, ROSE_MIN_LEN);
1135 skb_pull(skb, ROSE_MIN_LEN);
1137 frontlen = skb_headroom(skb);
1139 while (skb->len > 0) {
1140 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1149 skb_reserve(skbn, frontlen);
1151 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1153 /* Copy the user data */
1154 memcpy(skb_put(skbn, lg), skb->data, lg);
1157 /* Duplicate the Header */
1158 skb_push(skbn, ROSE_MIN_LEN);
1159 memcpy(skbn->data, header, ROSE_MIN_LEN);
1162 skbn->data[2] |= M_BIT;
1164 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1170 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1173 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1182 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1183 struct msghdr *msg, size_t size, int flags)
1185 struct sock *sk = sock->sk;
1186 rose_cb *rose = rose_sk(sk);
1187 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1189 unsigned char *asmptr;
1190 struct sk_buff *skb;
1194 * This works for seqpacket too. The receiver has ordered the queue for
1195 * us! We do one quick check first though
1197 if (sk->sk_state != TCP_ESTABLISHED)
1200 /* Now we can treat all alike */
1201 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1204 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1206 skb_pull(skb, ROSE_MIN_LEN);
1208 if (rose->qbitincl) {
1209 asmptr = skb_push(skb, 1);
1213 skb->h.raw = skb->data;
1216 if (copied > size) {
1218 msg->msg_flags |= MSG_TRUNC;
1221 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1223 if (srose != NULL) {
1224 srose->srose_family = AF_ROSE;
1225 srose->srose_addr = rose->dest_addr;
1226 srose->srose_call = rose->dest_call;
1227 srose->srose_ndigis = rose->dest_ndigis;
1228 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1229 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1230 for (n = 0 ; n < rose->dest_ndigis ; n++)
1231 full_srose->srose_digis[n] = rose->dest_digis[n];
1232 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1234 if (rose->dest_ndigis >= 1) {
1235 srose->srose_ndigis = 1;
1236 srose->srose_digi = rose->dest_digis[0];
1238 msg->msg_namelen = sizeof(struct sockaddr_rose);
1242 skb_free_datagram(sk, skb);
1248 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1250 struct sock *sk = sock->sk;
1251 rose_cb *rose = rose_sk(sk);
1256 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1259 return put_user(amount, (unsigned int *)arg);
1263 struct sk_buff *skb;
1265 /* These two are safe on a single CPU system as only user tasks fiddle here */
1266 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1268 return put_user(amount, (unsigned int *)arg);
1273 return sock_get_timestamp(sk, (struct timeval __user *)arg);
1278 case SIOCGIFDSTADDR:
1279 case SIOCSIFDSTADDR:
1280 case SIOCGIFBRDADDR:
1281 case SIOCSIFBRDADDR:
1282 case SIOCGIFNETMASK:
1283 case SIOCSIFNETMASK:
1291 if (!capable(CAP_NET_ADMIN))
1293 return rose_rt_ioctl(cmd, (void *)arg);
1295 case SIOCRSGCAUSE: {
1296 struct rose_cause_struct rose_cause;
1297 rose_cause.cause = rose->cause;
1298 rose_cause.diagnostic = rose->diagnostic;
1299 return copy_to_user((void *)arg, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1302 case SIOCRSSCAUSE: {
1303 struct rose_cause_struct rose_cause;
1304 if (copy_from_user(&rose_cause, (void *)arg, sizeof(struct rose_cause_struct)))
1306 rose->cause = rose_cause.cause;
1307 rose->diagnostic = rose_cause.diagnostic;
1312 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1313 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1314 ax25_listen_release(&rose_callsign, NULL);
1315 if (copy_from_user(&rose_callsign, (void *)arg, sizeof(ax25_address)))
1317 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1318 ax25_listen_register(&rose_callsign, NULL);
1322 return copy_to_user((void *)arg, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1325 if (rose->state == ROSE_STATE_5) {
1326 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1327 rose_start_idletimer(sk);
1328 rose->condition = 0x00;
1333 rose->state = ROSE_STATE_3;
1338 return dev_ioctl(cmd, (void __user *)arg);
1344 #ifdef CONFIG_PROC_FS
1345 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1349 struct hlist_node *node;
1351 spin_lock_bh(&rose_list_lock);
1353 return SEQ_START_TOKEN;
1356 sk_for_each(s, node, &rose_list) {
1364 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1368 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1369 : sk_next((struct sock *)v);
1372 static void rose_info_stop(struct seq_file *seq, void *v)
1374 spin_unlock_bh(&rose_list_lock);
1377 static int rose_info_show(struct seq_file *seq, void *v)
1379 if (v == SEQ_START_TOKEN)
1381 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1385 rose_cb *rose = rose_sk(s);
1386 const char *devname, *callsign;
1387 const struct net_device *dev = rose->device;
1392 devname = dev->name;
1394 seq_printf(seq, "%-10s %-9s ",
1395 rose2asc(&rose->dest_addr),
1396 ax2asc(&rose->dest_call));
1398 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1399 callsign = "??????-?";
1401 callsign = ax2asc(&rose->source_call);
1404 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1405 rose2asc(&rose->source_addr),
1409 (rose->neighbour) ? rose->neighbour->number : 0,
1414 ax25_display_timer(&rose->timer) / HZ,
1419 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1420 rose->idle / (60 * HZ),
1421 atomic_read(&s->sk_wmem_alloc),
1422 atomic_read(&s->sk_rmem_alloc),
1423 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1429 static struct seq_operations rose_info_seqops = {
1430 .start = rose_info_start,
1431 .next = rose_info_next,
1432 .stop = rose_info_stop,
1433 .show = rose_info_show,
1436 static int rose_info_open(struct inode *inode, struct file *file)
1438 return seq_open(file, &rose_info_seqops);
1441 static struct file_operations rose_info_fops = {
1442 .owner = THIS_MODULE,
1443 .open = rose_info_open,
1445 .llseek = seq_lseek,
1446 .release = seq_release,
1448 #endif /* CONFIG_PROC_FS */
1450 static struct net_proto_family rose_family_ops = {
1452 .create = rose_create,
1453 .owner = THIS_MODULE,
1456 static struct proto_ops rose_proto_ops = {
1458 .owner = THIS_MODULE,
1459 .release = rose_release,
1461 .connect = rose_connect,
1462 .socketpair = sock_no_socketpair,
1463 .accept = rose_accept,
1464 .getname = rose_getname,
1465 .poll = datagram_poll,
1466 .ioctl = rose_ioctl,
1467 .listen = rose_listen,
1468 .shutdown = sock_no_shutdown,
1469 .setsockopt = rose_setsockopt,
1470 .getsockopt = rose_getsockopt,
1471 .sendmsg = rose_sendmsg,
1472 .recvmsg = rose_recvmsg,
1473 .mmap = sock_no_mmap,
1474 .sendpage = sock_no_sendpage,
1477 static struct notifier_block rose_dev_notifier = {
1478 .notifier_call = rose_device_event,
1481 static struct net_device **dev_rose;
1483 static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n";
1485 static int __init rose_proto_init(void)
1489 rose_callsign = null_ax25_address;
1491 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1492 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1496 dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1497 if (dev_rose == NULL) {
1498 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1502 memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1503 for (i = 0; i < rose_ndevs; i++) {
1504 struct net_device *dev;
1505 char name[IFNAMSIZ];
1507 sprintf(name, "rose%d", i);
1508 dev = alloc_netdev(sizeof(struct net_device_stats),
1511 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1514 if (register_netdev(dev)) {
1515 printk(KERN_ERR "ROSE: netdevice regeistration failed\n");
1522 sock_register(&rose_family_ops);
1523 register_netdevice_notifier(&rose_dev_notifier);
1526 ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1527 ax25_linkfail_register(rose_link_failed);
1529 #ifdef CONFIG_SYSCTL
1530 rose_register_sysctl();
1532 rose_loopback_init();
1534 rose_add_loopback_neigh();
1536 proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1537 proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1538 proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1539 proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1544 unregister_netdev(dev_rose[i]);
1545 free_netdev(dev_rose[i]);
1550 module_init(rose_proto_init);
1552 MODULE_PARM(rose_ndevs, "i");
1553 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1555 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1556 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1557 MODULE_LICENSE("GPL");
1558 MODULE_ALIAS_NETPROTO(PF_ROSE);
1560 static void __exit rose_exit(void)
1564 proc_net_remove("rose");
1565 proc_net_remove("rose_neigh");
1566 proc_net_remove("rose_nodes");
1567 proc_net_remove("rose_routes");
1568 rose_loopback_clear();
1572 ax25_protocol_release(AX25_P_ROSE);
1573 ax25_linkfail_release(rose_link_failed);
1575 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1576 ax25_listen_release(&rose_callsign, NULL);
1578 #ifdef CONFIG_SYSCTL
1579 rose_unregister_sysctl();
1581 unregister_netdevice_notifier(&rose_dev_notifier);
1583 sock_unregister(PF_ROSE);
1585 for (i = 0; i < rose_ndevs; i++) {
1586 struct net_device *dev = dev_rose[i];
1589 unregister_netdev(dev);
1597 module_exit(rose_exit);