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/moduleparam.h>
15 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <linux/types.h>
18 #include <linux/socket.h>
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/spinlock.h>
23 #include <linux/timer.h>
24 #include <linux/string.h>
25 #include <linux/sockios.h>
26 #include <linux/net.h>
27 #include <linux/stat.h>
29 #include <linux/inet.h>
30 #include <linux/netdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/skbuff.h>
34 #include <asm/system.h>
35 #include <asm/uaccess.h>
36 #include <linux/fcntl.h>
37 #include <linux/termios.h>
39 #include <linux/interrupt.h>
40 #include <linux/notifier.h>
42 #include <linux/proc_fs.h>
43 #include <linux/seq_file.h>
48 static int rose_ndevs = 10;
50 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
51 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
52 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
53 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
54 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
55 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
56 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
57 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
58 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
59 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
61 static HLIST_HEAD(rose_list);
62 spinlock_t rose_list_lock = SPIN_LOCK_UNLOCKED;
64 static struct proto_ops rose_proto_ops;
66 ax25_address rose_callsign;
69 * Convert a ROSE address into text.
71 const char *rose2asc(const rose_address *addr)
73 static char buffer[11];
75 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
76 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
77 addr->rose_addr[4] == 0x00) {
80 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
81 addr->rose_addr[1] & 0xFF,
82 addr->rose_addr[2] & 0xFF,
83 addr->rose_addr[3] & 0xFF,
84 addr->rose_addr[4] & 0xFF);
91 * Compare two ROSE addresses, 0 == equal.
93 int rosecmp(rose_address *addr1, rose_address *addr2)
97 for (i = 0; i < 5; i++)
98 if (addr1->rose_addr[i] != addr2->rose_addr[i])
105 * Compare two ROSE addresses for only mask digits, 0 == equal.
107 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
114 for (i = 0; i < mask; i++) {
118 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
121 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
129 static struct sock *rose_alloc_sock(void)
132 struct sock *sk = sk_alloc(PF_ROSE, GFP_ATOMIC, 1, NULL);
137 rose = sk->sk_protinfo = kmalloc(sizeof(*rose), GFP_ATOMIC);
141 memset(rose, 0x00, sizeof(*rose));
152 * Socket removal during an interrupt is now safe.
154 static void rose_remove_socket(struct sock *sk)
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
165 void rose_kill_by_neigh(struct rose_neigh *neigh)
168 struct hlist_node *node;
170 spin_lock_bh(&rose_list_lock);
171 sk_for_each(s, node, &rose_list) {
172 rose_cb *rose = rose_sk(s);
174 if (rose->neighbour == neigh) {
175 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
176 rose->neighbour->use--;
177 rose->neighbour = NULL;
180 spin_unlock_bh(&rose_list_lock);
184 * Kill all bound sockets on a dropped device.
186 static void rose_kill_by_device(struct net_device *dev)
189 struct hlist_node *node;
191 spin_lock_bh(&rose_list_lock);
192 sk_for_each(s, node, &rose_list) {
193 rose_cb *rose = rose_sk(s);
195 if (rose->device == dev) {
196 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
197 rose->neighbour->use--;
201 spin_unlock_bh(&rose_list_lock);
205 * Handle device status changes.
207 static int rose_device_event(struct notifier_block *this, unsigned long event,
210 struct net_device *dev = (struct net_device *)ptr;
212 if (event != NETDEV_DOWN)
217 rose_kill_by_device(dev);
220 rose_link_device_down(dev);
221 rose_rt_device_down(dev);
229 * Add a socket to the bound sockets list.
231 static void rose_insert_socket(struct sock *sk)
234 spin_lock_bh(&rose_list_lock);
235 sk_add_node(sk, &rose_list);
236 spin_unlock_bh(&rose_list_lock);
240 * Find a socket that wants to accept the Call Request we just
243 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
246 struct hlist_node *node;
248 spin_lock_bh(&rose_list_lock);
249 sk_for_each(s, node, &rose_list) {
250 rose_cb *rose = rose_sk(s);
252 if (!rosecmp(&rose->source_addr, addr) &&
253 !ax25cmp(&rose->source_call, call) &&
254 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
258 sk_for_each(s, node, &rose_list) {
259 rose_cb *rose = rose_sk(s);
261 if (!rosecmp(&rose->source_addr, addr) &&
262 !ax25cmp(&rose->source_call, &null_ax25_address) &&
263 s->sk_state == TCP_LISTEN)
268 spin_unlock_bh(&rose_list_lock);
273 * Find a connected ROSE socket given my LCI and device.
275 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
278 struct hlist_node *node;
280 spin_lock_bh(&rose_list_lock);
281 sk_for_each(s, node, &rose_list) {
282 rose_cb *rose = rose_sk(s);
284 if (rose->lci == lci && rose->neighbour == neigh)
289 spin_unlock_bh(&rose_list_lock);
294 * Find a unique LCI for a given device.
296 unsigned int rose_new_lci(struct rose_neigh *neigh)
300 if (neigh->dce_mode) {
301 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
302 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
305 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
306 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
316 void rose_destroy_socket(struct sock *);
319 * Handler for deferred kills.
321 static void rose_destroy_timer(unsigned long data)
323 rose_destroy_socket((struct sock *)data);
327 * This is called from user mode and the timers. Thus it protects itself
328 * against interrupt users but doesn't worry about being called during
329 * work. Once it is removed from the queue no interrupt or bottom half
330 * will touch it and we are (fairly 8-) ) safe.
332 void rose_destroy_socket(struct sock *sk)
336 rose_remove_socket(sk);
337 rose_stop_heartbeat(sk);
338 rose_stop_idletimer(sk);
341 rose_clear_queues(sk); /* Flush the queues */
343 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
344 if (skb->sk != sk) { /* A pending connection */
345 /* Queue the unaccepted socket for death */
346 sock_set_flag(skb->sk, SOCK_DEAD);
347 rose_start_heartbeat(skb->sk);
348 rose_sk(skb->sk)->state = ROSE_STATE_0;
354 if (atomic_read(&sk->sk_wmem_alloc) ||
355 atomic_read(&sk->sk_rmem_alloc)) {
356 /* Defer: outstanding buffers */
357 init_timer(&sk->sk_timer);
358 sk->sk_timer.expires = jiffies + 10 * HZ;
359 sk->sk_timer.function = rose_destroy_timer;
360 sk->sk_timer.data = (unsigned long)sk;
361 add_timer(&sk->sk_timer);
367 * Handling for system calls applied via the various interfaces to a
368 * ROSE socket object.
371 static int rose_setsockopt(struct socket *sock, int level, int optname,
372 char __user *optval, int optlen)
374 struct sock *sk = sock->sk;
375 rose_cb *rose = rose_sk(sk);
378 if (level != SOL_ROSE)
381 if (optlen < sizeof(int))
384 if (get_user(opt, (int __user *)optval))
389 rose->defer = opt ? 1 : 0;
419 rose->idle = opt * 60 * HZ;
423 rose->qbitincl = opt ? 1 : 0;
431 static int rose_getsockopt(struct socket *sock, int level, int optname,
432 char __user *optval, int __user *optlen)
434 struct sock *sk = sock->sk;
435 rose_cb *rose = rose_sk(sk);
439 if (level != SOL_ROSE)
442 if (get_user(len, optlen))
470 val = rose->idle / (60 * HZ);
474 val = rose->qbitincl;
481 len = min_t(unsigned int, len, sizeof(int));
483 if (put_user(len, optlen))
486 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
489 static int rose_listen(struct socket *sock, int backlog)
491 struct sock *sk = sock->sk;
493 if (sk->sk_state != TCP_LISTEN) {
494 rose_cb *rose = rose_sk(sk);
496 rose->dest_ndigis = 0;
497 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
498 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
499 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
500 sk->sk_max_ack_backlog = backlog;
501 sk->sk_state = TCP_LISTEN;
508 static int rose_create(struct socket *sock, int protocol)
513 if (sock->type != SOCK_SEQPACKET || protocol != 0)
514 return -ESOCKTNOSUPPORT;
516 if ((sk = rose_alloc_sock()) == NULL)
521 sock_init_data(sock, sk);
522 sk_set_owner(sk, THIS_MODULE);
524 skb_queue_head_init(&rose->ack_queue);
526 skb_queue_head_init(&rose->frag_queue);
530 sock->ops = &rose_proto_ops;
531 sk->sk_protocol = protocol;
533 init_timer(&rose->timer);
534 init_timer(&rose->idletimer);
536 rose->t1 = sysctl_rose_call_request_timeout;
537 rose->t2 = sysctl_rose_reset_request_timeout;
538 rose->t3 = sysctl_rose_clear_request_timeout;
539 rose->hb = sysctl_rose_ack_hold_back_timeout;
540 rose->idle = sysctl_rose_no_activity_timeout;
542 rose->state = ROSE_STATE_0;
547 static struct sock *rose_make_new(struct sock *osk)
550 rose_cb *rose, *orose;
552 if (osk->sk_type != SOCK_SEQPACKET)
555 if ((sk = rose_alloc_sock()) == NULL)
560 sock_init_data(NULL, sk);
561 sk_set_owner(sk, THIS_MODULE);
563 skb_queue_head_init(&rose->ack_queue);
565 skb_queue_head_init(&rose->frag_queue);
569 sk->sk_type = osk->sk_type;
570 sk->sk_socket = osk->sk_socket;
571 sk->sk_priority = osk->sk_priority;
572 sk->sk_protocol = osk->sk_protocol;
573 sk->sk_rcvbuf = osk->sk_rcvbuf;
574 sk->sk_sndbuf = osk->sk_sndbuf;
575 sk->sk_debug = osk->sk_debug;
576 sk->sk_state = TCP_ESTABLISHED;
577 sk->sk_sleep = osk->sk_sleep;
578 sk->sk_zapped = osk->sk_zapped;
580 init_timer(&rose->timer);
581 init_timer(&rose->idletimer);
583 orose = rose_sk(osk);
584 rose->t1 = orose->t1;
585 rose->t2 = orose->t2;
586 rose->t3 = orose->t3;
587 rose->hb = orose->hb;
588 rose->idle = orose->idle;
589 rose->defer = orose->defer;
590 rose->device = orose->device;
591 rose->qbitincl = orose->qbitincl;
596 static int rose_release(struct socket *sock)
598 struct sock *sk = sock->sk;
601 if (sk == NULL) return 0;
605 switch (rose->state) {
607 rose_disconnect(sk, 0, -1, -1);
608 rose_destroy_socket(sk);
612 rose->neighbour->use--;
613 rose_disconnect(sk, 0, -1, -1);
614 rose_destroy_socket(sk);
621 rose_clear_queues(sk);
622 rose_stop_idletimer(sk);
623 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
624 rose_start_t3timer(sk);
625 rose->state = ROSE_STATE_2;
626 sk->sk_state = TCP_CLOSE;
627 sk->sk_shutdown |= SEND_SHUTDOWN;
628 sk->sk_state_change(sk);
629 sock_set_flag(sk, SOCK_DEAD);
630 sock_set_flag(sk, SOCK_DESTROY);
642 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
644 struct sock *sk = sock->sk;
645 rose_cb *rose = rose_sk(sk);
646 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
647 struct net_device *dev;
648 ax25_address *user, *source;
654 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
657 if (addr->srose_family != AF_ROSE)
660 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
663 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
666 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
667 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
668 return -EADDRNOTAVAIL;
671 source = &addr->srose_call;
673 if ((user = ax25_findbyuid(current->euid)) == NULL) {
674 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
679 rose->source_addr = addr->srose_addr;
680 rose->source_call = *user;
682 rose->source_ndigis = addr->srose_ndigis;
684 if (addr_len == sizeof(struct full_sockaddr_rose)) {
685 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
686 for (n = 0 ; n < addr->srose_ndigis ; n++)
687 rose->source_digis[n] = full_addr->srose_digis[n];
689 if (rose->source_ndigis == 1) {
690 rose->source_digis[0] = addr->srose_digi;
694 rose_insert_socket(sk);
697 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
701 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
703 struct sock *sk = sock->sk;
704 rose_cb *rose = rose_sk(sk);
705 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
706 unsigned char cause, diagnostic;
708 struct net_device *dev;
711 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
712 sock->state = SS_CONNECTED;
713 return 0; /* Connect completed during a ERESTARTSYS event */
716 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
717 sock->state = SS_UNCONNECTED;
718 return -ECONNREFUSED;
721 if (sk->sk_state == TCP_ESTABLISHED)
722 return -EISCONN; /* No reconnect on a seqpacket socket */
724 sk->sk_state = TCP_CLOSE;
725 sock->state = SS_UNCONNECTED;
727 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
730 if (addr->srose_family != AF_ROSE)
733 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
736 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
739 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
740 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
743 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
745 if (!rose->neighbour)
748 rose->lci = rose_new_lci(rose->neighbour);
752 if (sk->sk_zapped) { /* Must bind first - autobinding in this may or may not work */
755 if ((dev = rose_dev_first()) == NULL)
758 if ((user = ax25_findbyuid(current->euid)) == NULL)
761 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
762 rose->source_call = *user;
765 rose_insert_socket(sk); /* Finish the bind */
768 rose->dest_addr = addr->srose_addr;
769 rose->dest_call = addr->srose_call;
770 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
771 rose->dest_ndigis = addr->srose_ndigis;
773 if (addr_len == sizeof(struct full_sockaddr_rose)) {
774 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
775 for (n = 0 ; n < addr->srose_ndigis ; n++)
776 rose->dest_digis[n] = full_addr->srose_digis[n];
778 if (rose->dest_ndigis == 1) {
779 rose->dest_digis[0] = addr->srose_digi;
783 /* Move to connecting socket, start sending Connect Requests */
784 sock->state = SS_CONNECTING;
785 sk->sk_state = TCP_SYN_SENT;
787 rose->state = ROSE_STATE_1;
789 rose->neighbour->use++;
791 rose_write_internal(sk, ROSE_CALL_REQUEST);
792 rose_start_heartbeat(sk);
793 rose_start_t1timer(sk);
796 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
800 * A Connect Ack with Choke or timeout or failed routing will go to
803 if (sk->sk_state == TCP_SYN_SENT) {
804 struct task_struct *tsk = current;
805 DECLARE_WAITQUEUE(wait, tsk);
807 add_wait_queue(sk->sk_sleep, &wait);
809 set_current_state(TASK_INTERRUPTIBLE);
810 if (sk->sk_state != TCP_SYN_SENT)
812 if (!signal_pending(tsk)) {
816 current->state = TASK_RUNNING;
817 remove_wait_queue(sk->sk_sleep, &wait);
820 current->state = TASK_RUNNING;
821 remove_wait_queue(sk->sk_sleep, &wait);
824 if (sk->sk_state != TCP_ESTABLISHED) {
825 sock->state = SS_UNCONNECTED;
826 return sock_error(sk); /* Always set at this point */
829 sock->state = SS_CONNECTED;
834 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
836 struct task_struct *tsk = current;
837 DECLARE_WAITQUEUE(wait, tsk);
843 if ((sk = sock->sk) == NULL)
847 if (sk->sk_type != SOCK_SEQPACKET) {
852 if (sk->sk_state != TCP_LISTEN) {
858 * The write queue this time is holding sockets ready to use
859 * hooked into the SABM we saved
861 add_wait_queue(sk->sk_sleep, &wait);
863 skb = skb_dequeue(&sk->sk_receive_queue);
867 current->state = TASK_INTERRUPTIBLE;
869 if (flags & O_NONBLOCK) {
870 current->state = TASK_RUNNING;
871 remove_wait_queue(sk->sk_sleep, &wait);
874 if (!signal_pending(tsk)) {
881 current->state = TASK_RUNNING;
882 remove_wait_queue(sk->sk_sleep, &wait);
885 newsk->sk_pair = NULL;
886 newsk->sk_socket = newsock;
887 newsk->sk_sleep = &newsock->wait;
889 /* Now attach up the new socket */
892 sk->sk_ack_backlog--;
901 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
902 int *uaddr_len, int peer)
904 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
905 struct sock *sk = sock->sk;
906 rose_cb *rose = rose_sk(sk);
910 if (sk->sk_state != TCP_ESTABLISHED)
912 srose->srose_family = AF_ROSE;
913 srose->srose_addr = rose->dest_addr;
914 srose->srose_call = rose->dest_call;
915 srose->srose_ndigis = rose->dest_ndigis;
916 for (n = 0; n < rose->dest_ndigis; n++)
917 srose->srose_digis[n] = rose->dest_digis[n];
919 srose->srose_family = AF_ROSE;
920 srose->srose_addr = rose->source_addr;
921 srose->srose_call = rose->source_call;
922 srose->srose_ndigis = rose->source_ndigis;
923 for (n = 0; n < rose->source_ndigis; n++)
924 srose->srose_digis[n] = rose->source_digis[n];
927 *uaddr_len = sizeof(struct full_sockaddr_rose);
931 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
936 struct rose_facilities_struct facilities;
939 skb->sk = NULL; /* Initially we don't know who it's for */
942 * skb->data points to the rose frame start
944 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
946 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
947 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
948 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
949 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
953 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
956 * We can't accept the Call Request.
958 if (!sk || sk->sk_ack_backlog == sk->sk_max_ack_backlog ||
959 (make = rose_make_new(sk)) == NULL) {
960 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
965 make->sk_state = TCP_ESTABLISHED;
966 make_rose = rose_sk(make);
968 make_rose->lci = lci;
969 make_rose->dest_addr = facilities.dest_addr;
970 make_rose->dest_call = facilities.dest_call;
971 make_rose->dest_ndigis = facilities.dest_ndigis;
972 for (n = 0 ; n < facilities.dest_ndigis ; n++)
973 make_rose->dest_digis[n] = facilities.dest_digis[n];
974 make_rose->source_addr = facilities.source_addr;
975 make_rose->source_call = facilities.source_call;
976 make_rose->source_ndigis = facilities.source_ndigis;
977 for (n = 0 ; n < facilities.source_ndigis ; n++)
978 make_rose->source_digis[n]= facilities.source_digis[n];
979 make_rose->neighbour = neigh;
980 make_rose->device = dev;
981 make_rose->facilities = facilities;
983 make_rose->neighbour->use++;
985 if (rose_sk(sk)->defer) {
986 make_rose->state = ROSE_STATE_5;
988 rose_write_internal(make, ROSE_CALL_ACCEPTED);
989 make_rose->state = ROSE_STATE_3;
990 rose_start_idletimer(make);
993 make_rose->condition = 0x00;
998 sk->sk_ack_backlog++;
1001 rose_insert_socket(make);
1003 skb_queue_head(&sk->sk_receive_queue, skb);
1005 rose_start_heartbeat(make);
1007 if (!sock_flag(sk, SOCK_DEAD))
1008 sk->sk_data_ready(sk, skb->len);
1013 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1014 struct msghdr *msg, size_t len)
1016 struct sock *sk = sock->sk;
1017 rose_cb *rose = rose_sk(sk);
1018 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1020 struct full_sockaddr_rose srose;
1021 struct sk_buff *skb;
1022 unsigned char *asmptr;
1023 int n, size, qbit = 0;
1025 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1029 return -EADDRNOTAVAIL;
1031 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1032 send_sig(SIGPIPE, current, 0);
1036 if (rose->neighbour == NULL || rose->device == NULL)
1037 return -ENETUNREACH;
1039 if (usrose != NULL) {
1040 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1042 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1043 memcpy(&srose, usrose, msg->msg_namelen);
1044 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1045 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1047 if (srose.srose_ndigis != rose->dest_ndigis)
1049 if (srose.srose_ndigis == rose->dest_ndigis) {
1050 for (n = 0 ; n < srose.srose_ndigis ; n++)
1051 if (ax25cmp(&rose->dest_digis[n],
1052 &srose.srose_digis[n]))
1055 if (srose.srose_family != AF_ROSE)
1058 if (sk->sk_state != TCP_ESTABLISHED)
1061 srose.srose_family = AF_ROSE;
1062 srose.srose_addr = rose->dest_addr;
1063 srose.srose_call = rose->dest_call;
1064 srose.srose_ndigis = rose->dest_ndigis;
1065 for (n = 0 ; n < rose->dest_ndigis ; n++)
1066 srose.srose_digis[n] = rose->dest_digis[n];
1069 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1071 /* Build a packet */
1072 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1073 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1075 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1078 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1081 * Put the data on the end
1083 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1085 asmptr = skb->h.raw = skb_put(skb, len);
1087 err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1094 * If the Q BIT Include socket option is in force, the first
1095 * byte of the user data is the logical value of the Q Bit.
1097 if (rose->qbitincl) {
1098 qbit = skb->data[0];
1103 * Push down the ROSE header
1105 asmptr = skb_push(skb, ROSE_MIN_LEN);
1107 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1109 /* Build a ROSE Network header */
1110 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1111 asmptr[1] = (rose->lci >> 0) & 0xFF;
1112 asmptr[2] = ROSE_DATA;
1115 asmptr[0] |= ROSE_Q_BIT;
1117 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1119 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1121 if (sk->sk_state != TCP_ESTABLISHED) {
1127 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1128 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1129 unsigned char header[ROSE_MIN_LEN];
1130 struct sk_buff *skbn;
1134 /* Save a copy of the Header */
1135 memcpy(header, skb->data, ROSE_MIN_LEN);
1136 skb_pull(skb, ROSE_MIN_LEN);
1138 frontlen = skb_headroom(skb);
1140 while (skb->len > 0) {
1141 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1150 skb_reserve(skbn, frontlen);
1152 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1154 /* Copy the user data */
1155 memcpy(skb_put(skbn, lg), skb->data, lg);
1158 /* Duplicate the Header */
1159 skb_push(skbn, ROSE_MIN_LEN);
1160 memcpy(skbn->data, header, ROSE_MIN_LEN);
1163 skbn->data[2] |= M_BIT;
1165 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1171 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1174 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1183 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1184 struct msghdr *msg, size_t size, int flags)
1186 struct sock *sk = sock->sk;
1187 rose_cb *rose = rose_sk(sk);
1188 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1190 unsigned char *asmptr;
1191 struct sk_buff *skb;
1195 * This works for seqpacket too. The receiver has ordered the queue for
1196 * us! We do one quick check first though
1198 if (sk->sk_state != TCP_ESTABLISHED)
1201 /* Now we can treat all alike */
1202 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1205 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1207 skb_pull(skb, ROSE_MIN_LEN);
1209 if (rose->qbitincl) {
1210 asmptr = skb_push(skb, 1);
1214 skb->h.raw = skb->data;
1217 if (copied > size) {
1219 msg->msg_flags |= MSG_TRUNC;
1222 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1224 if (srose != NULL) {
1225 srose->srose_family = AF_ROSE;
1226 srose->srose_addr = rose->dest_addr;
1227 srose->srose_call = rose->dest_call;
1228 srose->srose_ndigis = rose->dest_ndigis;
1229 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1230 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1231 for (n = 0 ; n < rose->dest_ndigis ; n++)
1232 full_srose->srose_digis[n] = rose->dest_digis[n];
1233 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1235 if (rose->dest_ndigis >= 1) {
1236 srose->srose_ndigis = 1;
1237 srose->srose_digi = rose->dest_digis[0];
1239 msg->msg_namelen = sizeof(struct sockaddr_rose);
1243 skb_free_datagram(sk, skb);
1249 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1251 struct sock *sk = sock->sk;
1252 rose_cb *rose = rose_sk(sk);
1253 void __user *argp = (void __user *)arg;
1258 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1261 return put_user(amount, (unsigned int __user *)argp);
1265 struct sk_buff *skb;
1267 /* These two are safe on a single CPU system as only user tasks fiddle here */
1268 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1270 return put_user(amount, (unsigned int __user *)argp);
1275 return sock_get_timestamp(sk, (struct timeval __user *)argp);
1280 case SIOCGIFDSTADDR:
1281 case SIOCSIFDSTADDR:
1282 case SIOCGIFBRDADDR:
1283 case SIOCSIFBRDADDR:
1284 case SIOCGIFNETMASK:
1285 case SIOCSIFNETMASK:
1293 if (!capable(CAP_NET_ADMIN))
1295 return rose_rt_ioctl(cmd, argp);
1297 case SIOCRSGCAUSE: {
1298 struct rose_cause_struct rose_cause;
1299 rose_cause.cause = rose->cause;
1300 rose_cause.diagnostic = rose->diagnostic;
1301 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1304 case SIOCRSSCAUSE: {
1305 struct rose_cause_struct rose_cause;
1306 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1308 rose->cause = rose_cause.cause;
1309 rose->diagnostic = rose_cause.diagnostic;
1314 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1315 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1316 ax25_listen_release(&rose_callsign, NULL);
1317 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1319 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1320 ax25_listen_register(&rose_callsign, NULL);
1324 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1327 if (rose->state == ROSE_STATE_5) {
1328 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1329 rose_start_idletimer(sk);
1330 rose->condition = 0x00;
1335 rose->state = ROSE_STATE_3;
1340 return dev_ioctl(cmd, argp);
1346 #ifdef CONFIG_PROC_FS
1347 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1351 struct hlist_node *node;
1353 spin_lock_bh(&rose_list_lock);
1355 return SEQ_START_TOKEN;
1358 sk_for_each(s, node, &rose_list) {
1366 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1370 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1371 : sk_next((struct sock *)v);
1374 static void rose_info_stop(struct seq_file *seq, void *v)
1376 spin_unlock_bh(&rose_list_lock);
1379 static int rose_info_show(struct seq_file *seq, void *v)
1381 if (v == SEQ_START_TOKEN)
1383 "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");
1387 rose_cb *rose = rose_sk(s);
1388 const char *devname, *callsign;
1389 const struct net_device *dev = rose->device;
1394 devname = dev->name;
1396 seq_printf(seq, "%-10s %-9s ",
1397 rose2asc(&rose->dest_addr),
1398 ax2asc(&rose->dest_call));
1400 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1401 callsign = "??????-?";
1403 callsign = ax2asc(&rose->source_call);
1406 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1407 rose2asc(&rose->source_addr),
1411 (rose->neighbour) ? rose->neighbour->number : 0,
1416 ax25_display_timer(&rose->timer) / HZ,
1421 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1422 rose->idle / (60 * HZ),
1423 atomic_read(&s->sk_wmem_alloc),
1424 atomic_read(&s->sk_rmem_alloc),
1425 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1431 static struct seq_operations rose_info_seqops = {
1432 .start = rose_info_start,
1433 .next = rose_info_next,
1434 .stop = rose_info_stop,
1435 .show = rose_info_show,
1438 static int rose_info_open(struct inode *inode, struct file *file)
1440 return seq_open(file, &rose_info_seqops);
1443 static struct file_operations rose_info_fops = {
1444 .owner = THIS_MODULE,
1445 .open = rose_info_open,
1447 .llseek = seq_lseek,
1448 .release = seq_release,
1450 #endif /* CONFIG_PROC_FS */
1452 static struct net_proto_family rose_family_ops = {
1454 .create = rose_create,
1455 .owner = THIS_MODULE,
1458 static struct proto_ops rose_proto_ops = {
1460 .owner = THIS_MODULE,
1461 .release = rose_release,
1463 .connect = rose_connect,
1464 .socketpair = sock_no_socketpair,
1465 .accept = rose_accept,
1466 .getname = rose_getname,
1467 .poll = datagram_poll,
1468 .ioctl = rose_ioctl,
1469 .listen = rose_listen,
1470 .shutdown = sock_no_shutdown,
1471 .setsockopt = rose_setsockopt,
1472 .getsockopt = rose_getsockopt,
1473 .sendmsg = rose_sendmsg,
1474 .recvmsg = rose_recvmsg,
1475 .mmap = sock_no_mmap,
1476 .sendpage = sock_no_sendpage,
1479 static struct notifier_block rose_dev_notifier = {
1480 .notifier_call = rose_device_event,
1483 static struct net_device **dev_rose;
1485 static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n";
1487 static int __init rose_proto_init(void)
1491 rose_callsign = null_ax25_address;
1493 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1494 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1498 dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1499 if (dev_rose == NULL) {
1500 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1504 memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1505 for (i = 0; i < rose_ndevs; i++) {
1506 struct net_device *dev;
1507 char name[IFNAMSIZ];
1509 sprintf(name, "rose%d", i);
1510 dev = alloc_netdev(sizeof(struct net_device_stats),
1513 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1516 if (register_netdev(dev)) {
1517 printk(KERN_ERR "ROSE: netdevice regeistration failed\n");
1524 sock_register(&rose_family_ops);
1525 register_netdevice_notifier(&rose_dev_notifier);
1528 ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1529 ax25_linkfail_register(rose_link_failed);
1531 #ifdef CONFIG_SYSCTL
1532 rose_register_sysctl();
1534 rose_loopback_init();
1536 rose_add_loopback_neigh();
1538 proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1539 proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1540 proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1541 proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1546 unregister_netdev(dev_rose[i]);
1547 free_netdev(dev_rose[i]);
1552 module_init(rose_proto_init);
1554 module_param(rose_ndevs, int, 0);
1555 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1557 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1558 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1559 MODULE_LICENSE("GPL");
1560 MODULE_ALIAS_NETPROTO(PF_ROSE);
1562 static void __exit rose_exit(void)
1566 proc_net_remove("rose");
1567 proc_net_remove("rose_neigh");
1568 proc_net_remove("rose_nodes");
1569 proc_net_remove("rose_routes");
1570 rose_loopback_clear();
1574 ax25_protocol_release(AX25_P_ROSE);
1575 ax25_linkfail_release(rose_link_failed);
1577 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1578 ax25_listen_release(&rose_callsign, NULL);
1580 #ifdef CONFIG_SYSCTL
1581 rose_unregister_sysctl();
1583 unregister_netdevice_notifier(&rose_dev_notifier);
1585 sock_unregister(PF_ROSE);
1587 for (i = 0; i < rose_ndevs; i++) {
1588 struct net_device *dev = dev_rose[i];
1591 unregister_netdev(dev);
1599 module_exit(rose_exit);