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)
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/spinlock.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/stat.h>
29 #include <net/net_namespace.h>
31 #include <linux/inet.h>
32 #include <linux/netdevice.h>
33 #include <linux/if_arp.h>
34 #include <linux/skbuff.h>
36 #include <asm/system.h>
37 #include <asm/uaccess.h>
38 #include <linux/fcntl.h>
39 #include <linux/termios.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/tcp_states.h>
50 static int rose_ndevs
= 10;
52 int sysctl_rose_restart_request_timeout
= ROSE_DEFAULT_T0
;
53 int sysctl_rose_call_request_timeout
= ROSE_DEFAULT_T1
;
54 int sysctl_rose_reset_request_timeout
= ROSE_DEFAULT_T2
;
55 int sysctl_rose_clear_request_timeout
= ROSE_DEFAULT_T3
;
56 int sysctl_rose_no_activity_timeout
= ROSE_DEFAULT_IDLE
;
57 int sysctl_rose_ack_hold_back_timeout
= ROSE_DEFAULT_HB
;
58 int sysctl_rose_routing_control
= ROSE_DEFAULT_ROUTING
;
59 int sysctl_rose_link_fail_timeout
= ROSE_DEFAULT_FAIL_TIMEOUT
;
60 int sysctl_rose_maximum_vcs
= ROSE_DEFAULT_MAXVC
;
61 int sysctl_rose_window_size
= ROSE_DEFAULT_WINDOW_SIZE
;
63 static HLIST_HEAD(rose_list
);
64 static DEFINE_SPINLOCK(rose_list_lock
);
66 static struct proto_ops rose_proto_ops
;
68 ax25_address rose_callsign
;
71 * ROSE network devices are virtual network devices encapsulating ROSE
72 * frames into AX.25 which will be sent through an AX.25 device, so form a
73 * special "super class" of normal net devices; split their locks off into a
74 * separate class since they always nest.
76 static struct lock_class_key rose_netdev_xmit_lock_key
;
79 * Convert a ROSE address into text.
81 const char *rose2asc(const rose_address
*addr
)
83 static char buffer
[11];
85 if (addr
->rose_addr
[0] == 0x00 && addr
->rose_addr
[1] == 0x00 &&
86 addr
->rose_addr
[2] == 0x00 && addr
->rose_addr
[3] == 0x00 &&
87 addr
->rose_addr
[4] == 0x00) {
90 sprintf(buffer
, "%02X%02X%02X%02X%02X", addr
->rose_addr
[0] & 0xFF,
91 addr
->rose_addr
[1] & 0xFF,
92 addr
->rose_addr
[2] & 0xFF,
93 addr
->rose_addr
[3] & 0xFF,
94 addr
->rose_addr
[4] & 0xFF);
101 * Compare two ROSE addresses, 0 == equal.
103 int rosecmp(rose_address
*addr1
, rose_address
*addr2
)
107 for (i
= 0; i
< 5; i
++)
108 if (addr1
->rose_addr
[i
] != addr2
->rose_addr
[i
])
115 * Compare two ROSE addresses for only mask digits, 0 == equal.
117 int rosecmpm(rose_address
*addr1
, rose_address
*addr2
, unsigned short mask
)
124 for (i
= 0; i
< mask
; i
++) {
128 if ((addr1
->rose_addr
[j
] & 0x0F) != (addr2
->rose_addr
[j
] & 0x0F))
131 if ((addr1
->rose_addr
[j
] & 0xF0) != (addr2
->rose_addr
[j
] & 0xF0))
140 * Socket removal during an interrupt is now safe.
142 static void rose_remove_socket(struct sock
*sk
)
144 spin_lock_bh(&rose_list_lock
);
145 sk_del_node_init(sk
);
146 spin_unlock_bh(&rose_list_lock
);
150 * Kill all bound sockets on a broken link layer connection to a
151 * particular neighbour.
153 void rose_kill_by_neigh(struct rose_neigh
*neigh
)
156 struct hlist_node
*node
;
158 spin_lock_bh(&rose_list_lock
);
159 sk_for_each(s
, node
, &rose_list
) {
160 struct rose_sock
*rose
= rose_sk(s
);
162 if (rose
->neighbour
== neigh
) {
163 rose_disconnect(s
, ENETUNREACH
, ROSE_OUT_OF_ORDER
, 0);
164 rose
->neighbour
->use
--;
165 rose
->neighbour
= NULL
;
168 spin_unlock_bh(&rose_list_lock
);
172 * Kill all bound sockets on a dropped device.
174 static void rose_kill_by_device(struct net_device
*dev
)
177 struct hlist_node
*node
;
179 spin_lock_bh(&rose_list_lock
);
180 sk_for_each(s
, node
, &rose_list
) {
181 struct rose_sock
*rose
= rose_sk(s
);
183 if (rose
->device
== dev
) {
184 rose_disconnect(s
, ENETUNREACH
, ROSE_OUT_OF_ORDER
, 0);
185 rose
->neighbour
->use
--;
189 spin_unlock_bh(&rose_list_lock
);
193 * Handle device status changes.
195 static int rose_device_event(struct notifier_block
*this, unsigned long event
,
198 struct net_device
*dev
= (struct net_device
*)ptr
;
200 if (dev_net(dev
) != &init_net
)
203 if (event
!= NETDEV_DOWN
)
208 rose_kill_by_device(dev
);
211 rose_link_device_down(dev
);
212 rose_rt_device_down(dev
);
220 * Add a socket to the bound sockets list.
222 static void rose_insert_socket(struct sock
*sk
)
225 spin_lock_bh(&rose_list_lock
);
226 sk_add_node(sk
, &rose_list
);
227 spin_unlock_bh(&rose_list_lock
);
231 * Find a socket that wants to accept the Call Request we just
234 static struct sock
*rose_find_listener(rose_address
*addr
, ax25_address
*call
)
237 struct hlist_node
*node
;
239 spin_lock_bh(&rose_list_lock
);
240 sk_for_each(s
, node
, &rose_list
) {
241 struct rose_sock
*rose
= rose_sk(s
);
243 if (!rosecmp(&rose
->source_addr
, addr
) &&
244 !ax25cmp(&rose
->source_call
, call
) &&
245 !rose
->source_ndigis
&& s
->sk_state
== TCP_LISTEN
)
249 sk_for_each(s
, node
, &rose_list
) {
250 struct rose_sock
*rose
= rose_sk(s
);
252 if (!rosecmp(&rose
->source_addr
, addr
) &&
253 !ax25cmp(&rose
->source_call
, &null_ax25_address
) &&
254 s
->sk_state
== TCP_LISTEN
)
259 spin_unlock_bh(&rose_list_lock
);
264 * Find a connected ROSE socket given my LCI and device.
266 struct sock
*rose_find_socket(unsigned int lci
, struct rose_neigh
*neigh
)
269 struct hlist_node
*node
;
271 spin_lock_bh(&rose_list_lock
);
272 sk_for_each(s
, node
, &rose_list
) {
273 struct rose_sock
*rose
= rose_sk(s
);
275 if (rose
->lci
== lci
&& rose
->neighbour
== neigh
)
280 spin_unlock_bh(&rose_list_lock
);
285 * Find a unique LCI for a given device.
287 unsigned int rose_new_lci(struct rose_neigh
*neigh
)
291 if (neigh
->dce_mode
) {
292 for (lci
= 1; lci
<= sysctl_rose_maximum_vcs
; lci
++)
293 if (rose_find_socket(lci
, neigh
) == NULL
&& rose_route_free_lci(lci
, neigh
) == NULL
)
296 for (lci
= sysctl_rose_maximum_vcs
; lci
> 0; lci
--)
297 if (rose_find_socket(lci
, neigh
) == NULL
&& rose_route_free_lci(lci
, neigh
) == NULL
)
307 void rose_destroy_socket(struct sock
*);
310 * Handler for deferred kills.
312 static void rose_destroy_timer(unsigned long data
)
314 rose_destroy_socket((struct sock
*)data
);
318 * This is called from user mode and the timers. Thus it protects itself
319 * against interrupt users but doesn't worry about being called during
320 * work. Once it is removed from the queue no interrupt or bottom half
321 * will touch it and we are (fairly 8-) ) safe.
323 void rose_destroy_socket(struct sock
*sk
)
327 rose_remove_socket(sk
);
328 rose_stop_heartbeat(sk
);
329 rose_stop_idletimer(sk
);
332 rose_clear_queues(sk
); /* Flush the queues */
334 while ((skb
= skb_dequeue(&sk
->sk_receive_queue
)) != NULL
) {
335 if (skb
->sk
!= sk
) { /* A pending connection */
336 /* Queue the unaccepted socket for death */
337 sock_set_flag(skb
->sk
, SOCK_DEAD
);
338 rose_start_heartbeat(skb
->sk
);
339 rose_sk(skb
->sk
)->state
= ROSE_STATE_0
;
345 if (atomic_read(&sk
->sk_wmem_alloc
) ||
346 atomic_read(&sk
->sk_rmem_alloc
)) {
347 /* Defer: outstanding buffers */
348 setup_timer(&sk
->sk_timer
, rose_destroy_timer
,
350 sk
->sk_timer
.expires
= jiffies
+ 10 * HZ
;
351 add_timer(&sk
->sk_timer
);
357 * Handling for system calls applied via the various interfaces to a
358 * ROSE socket object.
361 static int rose_setsockopt(struct socket
*sock
, int level
, int optname
,
362 char __user
*optval
, int optlen
)
364 struct sock
*sk
= sock
->sk
;
365 struct rose_sock
*rose
= rose_sk(sk
);
368 if (level
!= SOL_ROSE
)
371 if (optlen
< sizeof(int))
374 if (get_user(opt
, (int __user
*)optval
))
379 rose
->defer
= opt
? 1 : 0;
409 rose
->idle
= opt
* 60 * HZ
;
413 rose
->qbitincl
= opt
? 1 : 0;
421 static int rose_getsockopt(struct socket
*sock
, int level
, int optname
,
422 char __user
*optval
, int __user
*optlen
)
424 struct sock
*sk
= sock
->sk
;
425 struct rose_sock
*rose
= rose_sk(sk
);
429 if (level
!= SOL_ROSE
)
432 if (get_user(len
, optlen
))
460 val
= rose
->idle
/ (60 * HZ
);
464 val
= rose
->qbitincl
;
471 len
= min_t(unsigned int, len
, sizeof(int));
473 if (put_user(len
, optlen
))
476 return copy_to_user(optval
, &val
, len
) ? -EFAULT
: 0;
479 static int rose_listen(struct socket
*sock
, int backlog
)
481 struct sock
*sk
= sock
->sk
;
483 if (sk
->sk_state
!= TCP_LISTEN
) {
484 struct rose_sock
*rose
= rose_sk(sk
);
486 rose
->dest_ndigis
= 0;
487 memset(&rose
->dest_addr
, 0, ROSE_ADDR_LEN
);
488 memset(&rose
->dest_call
, 0, AX25_ADDR_LEN
);
489 memset(rose
->dest_digis
, 0, AX25_ADDR_LEN
* ROSE_MAX_DIGIS
);
490 sk
->sk_max_ack_backlog
= backlog
;
491 sk
->sk_state
= TCP_LISTEN
;
498 static struct proto rose_proto
= {
500 .owner
= THIS_MODULE
,
501 .obj_size
= sizeof(struct rose_sock
),
504 static int rose_create(struct net
*net
, struct socket
*sock
, int protocol
)
507 struct rose_sock
*rose
;
509 if (net
!= &init_net
)
510 return -EAFNOSUPPORT
;
512 if (sock
->type
!= SOCK_SEQPACKET
|| protocol
!= 0)
513 return -ESOCKTNOSUPPORT
;
515 sk
= sk_alloc(net
, PF_ROSE
, GFP_ATOMIC
, &rose_proto
);
521 sock_init_data(sock
, sk
);
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
= msecs_to_jiffies(sysctl_rose_call_request_timeout
);
536 rose
->t2
= msecs_to_jiffies(sysctl_rose_reset_request_timeout
);
537 rose
->t3
= msecs_to_jiffies(sysctl_rose_clear_request_timeout
);
538 rose
->hb
= msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout
);
539 rose
->idle
= msecs_to_jiffies(sysctl_rose_no_activity_timeout
);
541 rose
->state
= ROSE_STATE_0
;
546 static struct sock
*rose_make_new(struct sock
*osk
)
549 struct rose_sock
*rose
, *orose
;
551 if (osk
->sk_type
!= SOCK_SEQPACKET
)
554 sk
= sk_alloc(sock_net(osk
), PF_ROSE
, GFP_ATOMIC
, &rose_proto
);
560 sock_init_data(NULL
, sk
);
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_priority
= osk
->sk_priority
;
570 sk
->sk_protocol
= osk
->sk_protocol
;
571 sk
->sk_rcvbuf
= osk
->sk_rcvbuf
;
572 sk
->sk_sndbuf
= osk
->sk_sndbuf
;
573 sk
->sk_state
= TCP_ESTABLISHED
;
574 sock_copy_flags(sk
, osk
);
576 init_timer(&rose
->timer
);
577 init_timer(&rose
->idletimer
);
579 orose
= rose_sk(osk
);
580 rose
->t1
= orose
->t1
;
581 rose
->t2
= orose
->t2
;
582 rose
->t3
= orose
->t3
;
583 rose
->hb
= orose
->hb
;
584 rose
->idle
= orose
->idle
;
585 rose
->defer
= orose
->defer
;
586 rose
->device
= orose
->device
;
587 rose
->qbitincl
= orose
->qbitincl
;
592 static int rose_release(struct socket
*sock
)
594 struct sock
*sk
= sock
->sk
;
595 struct rose_sock
*rose
;
597 if (sk
== NULL
) return 0;
604 switch (rose
->state
) {
607 rose_disconnect(sk
, 0, -1, -1);
609 rose_destroy_socket(sk
);
613 rose
->neighbour
->use
--;
615 rose_disconnect(sk
, 0, -1, -1);
617 rose_destroy_socket(sk
);
624 rose_clear_queues(sk
);
625 rose_stop_idletimer(sk
);
626 rose_write_internal(sk
, ROSE_CLEAR_REQUEST
);
627 rose_start_t3timer(sk
);
628 rose
->state
= ROSE_STATE_2
;
629 sk
->sk_state
= TCP_CLOSE
;
630 sk
->sk_shutdown
|= SEND_SHUTDOWN
;
631 sk
->sk_state_change(sk
);
632 sock_set_flag(sk
, SOCK_DEAD
);
633 sock_set_flag(sk
, SOCK_DESTROY
);
647 static int rose_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
649 struct sock
*sk
= sock
->sk
;
650 struct rose_sock
*rose
= rose_sk(sk
);
651 struct sockaddr_rose
*addr
= (struct sockaddr_rose
*)uaddr
;
652 struct net_device
*dev
;
653 ax25_address
*source
;
654 ax25_uid_assoc
*user
;
657 if (!sock_flag(sk
, SOCK_ZAPPED
))
660 if (addr_len
!= sizeof(struct sockaddr_rose
) && addr_len
!= sizeof(struct full_sockaddr_rose
))
663 if (addr
->srose_family
!= AF_ROSE
)
666 if (addr_len
== sizeof(struct sockaddr_rose
) && addr
->srose_ndigis
> 1)
669 if (addr
->srose_ndigis
> ROSE_MAX_DIGIS
)
672 if ((dev
= rose_dev_get(&addr
->srose_addr
)) == NULL
) {
673 SOCK_DEBUG(sk
, "ROSE: bind failed: invalid address\n");
674 return -EADDRNOTAVAIL
;
677 source
= &addr
->srose_call
;
679 user
= ax25_findbyuid(current
->euid
);
681 rose
->source_call
= user
->call
;
684 if (ax25_uid_policy
&& !capable(CAP_NET_BIND_SERVICE
))
686 rose
->source_call
= *source
;
689 rose
->source_addr
= addr
->srose_addr
;
691 rose
->source_ndigis
= addr
->srose_ndigis
;
693 if (addr_len
== sizeof(struct full_sockaddr_rose
)) {
694 struct full_sockaddr_rose
*full_addr
= (struct full_sockaddr_rose
*)uaddr
;
695 for (n
= 0 ; n
< addr
->srose_ndigis
; n
++)
696 rose
->source_digis
[n
] = full_addr
->srose_digis
[n
];
698 if (rose
->source_ndigis
== 1) {
699 rose
->source_digis
[0] = addr
->srose_digi
;
703 rose_insert_socket(sk
);
705 sock_reset_flag(sk
, SOCK_ZAPPED
);
706 SOCK_DEBUG(sk
, "ROSE: socket is bound\n");
710 static int rose_connect(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
, int flags
)
712 struct sock
*sk
= sock
->sk
;
713 struct rose_sock
*rose
= rose_sk(sk
);
714 struct sockaddr_rose
*addr
= (struct sockaddr_rose
*)uaddr
;
715 unsigned char cause
, diagnostic
;
716 struct net_device
*dev
;
717 ax25_uid_assoc
*user
;
720 if (addr_len
!= sizeof(struct sockaddr_rose
) && addr_len
!= sizeof(struct full_sockaddr_rose
))
723 if (addr
->srose_family
!= AF_ROSE
)
726 if (addr_len
== sizeof(struct sockaddr_rose
) && addr
->srose_ndigis
> 1)
729 if (addr
->srose_ndigis
> ROSE_MAX_DIGIS
)
732 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
733 if ((rose
->source_ndigis
+ addr
->srose_ndigis
) > ROSE_MAX_DIGIS
)
738 if (sk
->sk_state
== TCP_ESTABLISHED
&& sock
->state
== SS_CONNECTING
) {
739 /* Connect completed during a ERESTARTSYS event */
740 sock
->state
= SS_CONNECTED
;
744 if (sk
->sk_state
== TCP_CLOSE
&& sock
->state
== SS_CONNECTING
) {
745 sock
->state
= SS_UNCONNECTED
;
750 if (sk
->sk_state
== TCP_ESTABLISHED
) {
751 /* No reconnect on a seqpacket socket */
756 sk
->sk_state
= TCP_CLOSE
;
757 sock
->state
= SS_UNCONNECTED
;
759 rose
->neighbour
= rose_get_neigh(&addr
->srose_addr
, &cause
,
761 if (!rose
->neighbour
) {
766 rose
->lci
= rose_new_lci(rose
->neighbour
);
772 if (sock_flag(sk
, SOCK_ZAPPED
)) { /* Must bind first - autobinding in this may or may not work */
773 sock_reset_flag(sk
, SOCK_ZAPPED
);
775 if ((dev
= rose_dev_first()) == NULL
) {
780 user
= ax25_findbyuid(current
->euid
);
786 memcpy(&rose
->source_addr
, dev
->dev_addr
, ROSE_ADDR_LEN
);
787 rose
->source_call
= user
->call
;
791 rose_insert_socket(sk
); /* Finish the bind */
794 rose
->dest_addr
= addr
->srose_addr
;
795 rose
->dest_call
= addr
->srose_call
;
796 rose
->rand
= ((long)rose
& 0xFFFF) + rose
->lci
;
797 rose
->dest_ndigis
= addr
->srose_ndigis
;
799 if (addr_len
== sizeof(struct full_sockaddr_rose
)) {
800 struct full_sockaddr_rose
*full_addr
= (struct full_sockaddr_rose
*)uaddr
;
801 for (n
= 0 ; n
< addr
->srose_ndigis
; n
++)
802 rose
->dest_digis
[n
] = full_addr
->srose_digis
[n
];
804 if (rose
->dest_ndigis
== 1) {
805 rose
->dest_digis
[0] = addr
->srose_digi
;
809 /* Move to connecting socket, start sending Connect Requests */
810 sock
->state
= SS_CONNECTING
;
811 sk
->sk_state
= TCP_SYN_SENT
;
813 rose
->state
= ROSE_STATE_1
;
815 rose
->neighbour
->use
++;
817 rose_write_internal(sk
, ROSE_CALL_REQUEST
);
818 rose_start_heartbeat(sk
);
819 rose_start_t1timer(sk
);
822 if (sk
->sk_state
!= TCP_ESTABLISHED
&& (flags
& O_NONBLOCK
)) {
828 * A Connect Ack with Choke or timeout or failed routing will go to
831 if (sk
->sk_state
== TCP_SYN_SENT
) {
835 prepare_to_wait(sk
->sk_sleep
, &wait
,
837 if (sk
->sk_state
!= TCP_SYN_SENT
)
839 if (!signal_pending(current
)) {
848 finish_wait(sk
->sk_sleep
, &wait
);
854 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
855 /* Try next neighbour */
856 rose
->neighbour
= rose_get_neigh(&addr
->srose_addr
, &cause
, &diagnostic
, 0);
858 goto rose_try_next_neigh
;
860 /* No more neighbours */
861 sock
->state
= SS_UNCONNECTED
;
862 err
= sock_error(sk
); /* Always set at this point */
866 sock
->state
= SS_CONNECTED
;
874 static int rose_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
882 if ((sk
= sock
->sk
) == NULL
)
886 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
891 if (sk
->sk_state
!= TCP_LISTEN
) {
897 * The write queue this time is holding sockets ready to use
898 * hooked into the SABM we saved
901 prepare_to_wait(sk
->sk_sleep
, &wait
, TASK_INTERRUPTIBLE
);
903 skb
= skb_dequeue(&sk
->sk_receive_queue
);
907 if (flags
& O_NONBLOCK
) {
911 if (!signal_pending(current
)) {
920 finish_wait(sk
->sk_sleep
, &wait
);
925 sock_graft(newsk
, newsock
);
927 /* Now attach up the new socket */
930 sk
->sk_ack_backlog
--;
938 static int rose_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
939 int *uaddr_len
, int peer
)
941 struct full_sockaddr_rose
*srose
= (struct full_sockaddr_rose
*)uaddr
;
942 struct sock
*sk
= sock
->sk
;
943 struct rose_sock
*rose
= rose_sk(sk
);
947 if (sk
->sk_state
!= TCP_ESTABLISHED
)
949 srose
->srose_family
= AF_ROSE
;
950 srose
->srose_addr
= rose
->dest_addr
;
951 srose
->srose_call
= rose
->dest_call
;
952 srose
->srose_ndigis
= rose
->dest_ndigis
;
953 for (n
= 0; n
< rose
->dest_ndigis
; n
++)
954 srose
->srose_digis
[n
] = rose
->dest_digis
[n
];
956 srose
->srose_family
= AF_ROSE
;
957 srose
->srose_addr
= rose
->source_addr
;
958 srose
->srose_call
= rose
->source_call
;
959 srose
->srose_ndigis
= rose
->source_ndigis
;
960 for (n
= 0; n
< rose
->source_ndigis
; n
++)
961 srose
->srose_digis
[n
] = rose
->source_digis
[n
];
964 *uaddr_len
= sizeof(struct full_sockaddr_rose
);
968 int rose_rx_call_request(struct sk_buff
*skb
, struct net_device
*dev
, struct rose_neigh
*neigh
, unsigned int lci
)
972 struct rose_sock
*make_rose
;
973 struct rose_facilities_struct facilities
;
976 skb
->sk
= NULL
; /* Initially we don't know who it's for */
979 * skb->data points to the rose frame start
981 memset(&facilities
, 0x00, sizeof(struct rose_facilities_struct
));
983 len
= (((skb
->data
[3] >> 4) & 0x0F) + 1) >> 1;
984 len
+= (((skb
->data
[3] >> 0) & 0x0F) + 1) >> 1;
985 if (!rose_parse_facilities(skb
->data
+ len
+ 4, &facilities
)) {
986 rose_transmit_clear_request(neigh
, lci
, ROSE_INVALID_FACILITY
, 76);
990 sk
= rose_find_listener(&facilities
.source_addr
, &facilities
.source_call
);
993 * We can't accept the Call Request.
995 if (sk
== NULL
|| sk_acceptq_is_full(sk
) ||
996 (make
= rose_make_new(sk
)) == NULL
) {
997 rose_transmit_clear_request(neigh
, lci
, ROSE_NETWORK_CONGESTION
, 120);
1002 make
->sk_state
= TCP_ESTABLISHED
;
1003 make_rose
= rose_sk(make
);
1005 make_rose
->lci
= lci
;
1006 make_rose
->dest_addr
= facilities
.dest_addr
;
1007 make_rose
->dest_call
= facilities
.dest_call
;
1008 make_rose
->dest_ndigis
= facilities
.dest_ndigis
;
1009 for (n
= 0 ; n
< facilities
.dest_ndigis
; n
++)
1010 make_rose
->dest_digis
[n
] = facilities
.dest_digis
[n
];
1011 make_rose
->source_addr
= facilities
.source_addr
;
1012 make_rose
->source_call
= facilities
.source_call
;
1013 make_rose
->source_ndigis
= facilities
.source_ndigis
;
1014 for (n
= 0 ; n
< facilities
.source_ndigis
; n
++)
1015 make_rose
->source_digis
[n
]= facilities
.source_digis
[n
];
1016 make_rose
->neighbour
= neigh
;
1017 make_rose
->device
= dev
;
1018 make_rose
->facilities
= facilities
;
1020 make_rose
->neighbour
->use
++;
1022 if (rose_sk(sk
)->defer
) {
1023 make_rose
->state
= ROSE_STATE_5
;
1025 rose_write_internal(make
, ROSE_CALL_ACCEPTED
);
1026 make_rose
->state
= ROSE_STATE_3
;
1027 rose_start_idletimer(make
);
1030 make_rose
->condition
= 0x00;
1035 sk
->sk_ack_backlog
++;
1037 rose_insert_socket(make
);
1039 skb_queue_head(&sk
->sk_receive_queue
, skb
);
1041 rose_start_heartbeat(make
);
1043 if (!sock_flag(sk
, SOCK_DEAD
))
1044 sk
->sk_data_ready(sk
, skb
->len
);
1049 static int rose_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
1050 struct msghdr
*msg
, size_t len
)
1052 struct sock
*sk
= sock
->sk
;
1053 struct rose_sock
*rose
= rose_sk(sk
);
1054 struct sockaddr_rose
*usrose
= (struct sockaddr_rose
*)msg
->msg_name
;
1056 struct full_sockaddr_rose srose
;
1057 struct sk_buff
*skb
;
1058 unsigned char *asmptr
;
1059 int n
, size
, qbit
= 0;
1061 if (msg
->msg_flags
& ~(MSG_DONTWAIT
|MSG_EOR
|MSG_CMSG_COMPAT
))
1064 if (sock_flag(sk
, SOCK_ZAPPED
))
1065 return -EADDRNOTAVAIL
;
1067 if (sk
->sk_shutdown
& SEND_SHUTDOWN
) {
1068 send_sig(SIGPIPE
, current
, 0);
1072 if (rose
->neighbour
== NULL
|| rose
->device
== NULL
)
1073 return -ENETUNREACH
;
1075 if (usrose
!= NULL
) {
1076 if (msg
->msg_namelen
!= sizeof(struct sockaddr_rose
) && msg
->msg_namelen
!= sizeof(struct full_sockaddr_rose
))
1078 memset(&srose
, 0, sizeof(struct full_sockaddr_rose
));
1079 memcpy(&srose
, usrose
, msg
->msg_namelen
);
1080 if (rosecmp(&rose
->dest_addr
, &srose
.srose_addr
) != 0 ||
1081 ax25cmp(&rose
->dest_call
, &srose
.srose_call
) != 0)
1083 if (srose
.srose_ndigis
!= rose
->dest_ndigis
)
1085 if (srose
.srose_ndigis
== rose
->dest_ndigis
) {
1086 for (n
= 0 ; n
< srose
.srose_ndigis
; n
++)
1087 if (ax25cmp(&rose
->dest_digis
[n
],
1088 &srose
.srose_digis
[n
]))
1091 if (srose
.srose_family
!= AF_ROSE
)
1094 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1097 srose
.srose_family
= AF_ROSE
;
1098 srose
.srose_addr
= rose
->dest_addr
;
1099 srose
.srose_call
= rose
->dest_call
;
1100 srose
.srose_ndigis
= rose
->dest_ndigis
;
1101 for (n
= 0 ; n
< rose
->dest_ndigis
; n
++)
1102 srose
.srose_digis
[n
] = rose
->dest_digis
[n
];
1105 SOCK_DEBUG(sk
, "ROSE: sendto: Addresses built.\n");
1107 /* Build a packet */
1108 SOCK_DEBUG(sk
, "ROSE: sendto: building packet.\n");
1109 size
= len
+ AX25_BPQ_HEADER_LEN
+ AX25_MAX_HEADER_LEN
+ ROSE_MIN_LEN
;
1111 if ((skb
= sock_alloc_send_skb(sk
, size
, msg
->msg_flags
& MSG_DONTWAIT
, &err
)) == NULL
)
1114 skb_reserve(skb
, AX25_BPQ_HEADER_LEN
+ AX25_MAX_HEADER_LEN
+ ROSE_MIN_LEN
);
1117 * Put the data on the end
1119 SOCK_DEBUG(sk
, "ROSE: Appending user data\n");
1121 skb_reset_transport_header(skb
);
1124 err
= memcpy_fromiovec(skb_transport_header(skb
), msg
->msg_iov
, len
);
1131 * If the Q BIT Include socket option is in force, the first
1132 * byte of the user data is the logical value of the Q Bit.
1134 if (rose
->qbitincl
) {
1135 qbit
= skb
->data
[0];
1140 * Push down the ROSE header
1142 asmptr
= skb_push(skb
, ROSE_MIN_LEN
);
1144 SOCK_DEBUG(sk
, "ROSE: Building Network Header.\n");
1146 /* Build a ROSE Network header */
1147 asmptr
[0] = ((rose
->lci
>> 8) & 0x0F) | ROSE_GFI
;
1148 asmptr
[1] = (rose
->lci
>> 0) & 0xFF;
1149 asmptr
[2] = ROSE_DATA
;
1152 asmptr
[0] |= ROSE_Q_BIT
;
1154 SOCK_DEBUG(sk
, "ROSE: Built header.\n");
1156 SOCK_DEBUG(sk
, "ROSE: Transmitting buffer\n");
1158 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1164 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1165 if (skb
->len
- ROSE_MIN_LEN
> ROSE_PACLEN
) {
1166 unsigned char header
[ROSE_MIN_LEN
];
1167 struct sk_buff
*skbn
;
1171 /* Save a copy of the Header */
1172 skb_copy_from_linear_data(skb
, header
, ROSE_MIN_LEN
);
1173 skb_pull(skb
, ROSE_MIN_LEN
);
1175 frontlen
= skb_headroom(skb
);
1177 while (skb
->len
> 0) {
1178 if ((skbn
= sock_alloc_send_skb(sk
, frontlen
+ ROSE_PACLEN
, 0, &err
)) == NULL
) {
1187 skb_reserve(skbn
, frontlen
);
1189 lg
= (ROSE_PACLEN
> skb
->len
) ? skb
->len
: ROSE_PACLEN
;
1191 /* Copy the user data */
1192 skb_copy_from_linear_data(skb
, skb_put(skbn
, lg
), lg
);
1195 /* Duplicate the Header */
1196 skb_push(skbn
, ROSE_MIN_LEN
);
1197 skb_copy_to_linear_data(skbn
, header
, ROSE_MIN_LEN
);
1200 skbn
->data
[2] |= M_BIT
;
1202 skb_queue_tail(&sk
->sk_write_queue
, skbn
); /* Throw it on the queue */
1208 skb_queue_tail(&sk
->sk_write_queue
, skb
); /* Throw it on the queue */
1211 skb_queue_tail(&sk
->sk_write_queue
, skb
); /* Shove it onto the queue */
1220 static int rose_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
1221 struct msghdr
*msg
, size_t size
, int flags
)
1223 struct sock
*sk
= sock
->sk
;
1224 struct rose_sock
*rose
= rose_sk(sk
);
1225 struct sockaddr_rose
*srose
= (struct sockaddr_rose
*)msg
->msg_name
;
1227 unsigned char *asmptr
;
1228 struct sk_buff
*skb
;
1232 * This works for seqpacket too. The receiver has ordered the queue for
1233 * us! We do one quick check first though
1235 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1238 /* Now we can treat all alike */
1239 if ((skb
= skb_recv_datagram(sk
, flags
& ~MSG_DONTWAIT
, flags
& MSG_DONTWAIT
, &er
)) == NULL
)
1242 qbit
= (skb
->data
[0] & ROSE_Q_BIT
) == ROSE_Q_BIT
;
1244 skb_pull(skb
, ROSE_MIN_LEN
);
1246 if (rose
->qbitincl
) {
1247 asmptr
= skb_push(skb
, 1);
1251 skb_reset_transport_header(skb
);
1254 if (copied
> size
) {
1256 msg
->msg_flags
|= MSG_TRUNC
;
1259 skb_copy_datagram_iovec(skb
, 0, msg
->msg_iov
, copied
);
1261 if (srose
!= NULL
) {
1262 srose
->srose_family
= AF_ROSE
;
1263 srose
->srose_addr
= rose
->dest_addr
;
1264 srose
->srose_call
= rose
->dest_call
;
1265 srose
->srose_ndigis
= rose
->dest_ndigis
;
1266 if (msg
->msg_namelen
>= sizeof(struct full_sockaddr_rose
)) {
1267 struct full_sockaddr_rose
*full_srose
= (struct full_sockaddr_rose
*)msg
->msg_name
;
1268 for (n
= 0 ; n
< rose
->dest_ndigis
; n
++)
1269 full_srose
->srose_digis
[n
] = rose
->dest_digis
[n
];
1270 msg
->msg_namelen
= sizeof(struct full_sockaddr_rose
);
1272 if (rose
->dest_ndigis
>= 1) {
1273 srose
->srose_ndigis
= 1;
1274 srose
->srose_digi
= rose
->dest_digis
[0];
1276 msg
->msg_namelen
= sizeof(struct sockaddr_rose
);
1280 skb_free_datagram(sk
, skb
);
1286 static int rose_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
1288 struct sock
*sk
= sock
->sk
;
1289 struct rose_sock
*rose
= rose_sk(sk
);
1290 void __user
*argp
= (void __user
*)arg
;
1295 amount
= sk
->sk_sndbuf
- atomic_read(&sk
->sk_wmem_alloc
);
1298 return put_user(amount
, (unsigned int __user
*) argp
);
1302 struct sk_buff
*skb
;
1304 /* These two are safe on a single CPU system as only user tasks fiddle here */
1305 if ((skb
= skb_peek(&sk
->sk_receive_queue
)) != NULL
)
1307 return put_user(amount
, (unsigned int __user
*) argp
);
1311 return sock_get_timestamp(sk
, (struct timeval __user
*) argp
);
1314 return sock_get_timestampns(sk
, (struct timespec __user
*) argp
);
1318 case SIOCGIFDSTADDR
:
1319 case SIOCSIFDSTADDR
:
1320 case SIOCGIFBRDADDR
:
1321 case SIOCSIFBRDADDR
:
1322 case SIOCGIFNETMASK
:
1323 case SIOCSIFNETMASK
:
1331 if (!capable(CAP_NET_ADMIN
))
1333 return rose_rt_ioctl(cmd
, argp
);
1335 case SIOCRSGCAUSE
: {
1336 struct rose_cause_struct rose_cause
;
1337 rose_cause
.cause
= rose
->cause
;
1338 rose_cause
.diagnostic
= rose
->diagnostic
;
1339 return copy_to_user(argp
, &rose_cause
, sizeof(struct rose_cause_struct
)) ? -EFAULT
: 0;
1342 case SIOCRSSCAUSE
: {
1343 struct rose_cause_struct rose_cause
;
1344 if (copy_from_user(&rose_cause
, argp
, sizeof(struct rose_cause_struct
)))
1346 rose
->cause
= rose_cause
.cause
;
1347 rose
->diagnostic
= rose_cause
.diagnostic
;
1352 if (!capable(CAP_NET_ADMIN
)) return -EPERM
;
1353 if (ax25cmp(&rose_callsign
, &null_ax25_address
) != 0)
1354 ax25_listen_release(&rose_callsign
, NULL
);
1355 if (copy_from_user(&rose_callsign
, argp
, sizeof(ax25_address
)))
1357 if (ax25cmp(&rose_callsign
, &null_ax25_address
) != 0)
1358 return ax25_listen_register(&rose_callsign
, NULL
);
1363 return copy_to_user(argp
, &rose_callsign
, sizeof(ax25_address
)) ? -EFAULT
: 0;
1366 if (rose
->state
== ROSE_STATE_5
) {
1367 rose_write_internal(sk
, ROSE_CALL_ACCEPTED
);
1368 rose_start_idletimer(sk
);
1369 rose
->condition
= 0x00;
1374 rose
->state
= ROSE_STATE_3
;
1379 return -ENOIOCTLCMD
;
1385 #ifdef CONFIG_PROC_FS
1386 static void *rose_info_start(struct seq_file
*seq
, loff_t
*pos
)
1387 __acquires(rose_list_lock
)
1391 struct hlist_node
*node
;
1393 spin_lock_bh(&rose_list_lock
);
1395 return SEQ_START_TOKEN
;
1398 sk_for_each(s
, node
, &rose_list
) {
1406 static void *rose_info_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1410 return (v
== SEQ_START_TOKEN
) ? sk_head(&rose_list
)
1411 : sk_next((struct sock
*)v
);
1414 static void rose_info_stop(struct seq_file
*seq
, void *v
)
1415 __releases(rose_list_lock
)
1417 spin_unlock_bh(&rose_list_lock
);
1420 static int rose_info_show(struct seq_file
*seq
, void *v
)
1424 if (v
== SEQ_START_TOKEN
)
1426 "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");
1430 struct rose_sock
*rose
= rose_sk(s
);
1431 const char *devname
, *callsign
;
1432 const struct net_device
*dev
= rose
->device
;
1437 devname
= dev
->name
;
1439 seq_printf(seq
, "%-10s %-9s ",
1440 rose2asc(&rose
->dest_addr
),
1441 ax2asc(buf
, &rose
->dest_call
));
1443 if (ax25cmp(&rose
->source_call
, &null_ax25_address
) == 0)
1444 callsign
= "??????-?";
1446 callsign
= ax2asc(buf
, &rose
->source_call
);
1449 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1450 rose2asc(&rose
->source_addr
),
1454 (rose
->neighbour
) ? rose
->neighbour
->number
: 0,
1459 ax25_display_timer(&rose
->timer
) / HZ
,
1464 ax25_display_timer(&rose
->idletimer
) / (60 * HZ
),
1465 rose
->idle
/ (60 * HZ
),
1466 atomic_read(&s
->sk_wmem_alloc
),
1467 atomic_read(&s
->sk_rmem_alloc
),
1468 s
->sk_socket
? SOCK_INODE(s
->sk_socket
)->i_ino
: 0L);
1474 static const struct seq_operations rose_info_seqops
= {
1475 .start
= rose_info_start
,
1476 .next
= rose_info_next
,
1477 .stop
= rose_info_stop
,
1478 .show
= rose_info_show
,
1481 static int rose_info_open(struct inode
*inode
, struct file
*file
)
1483 return seq_open(file
, &rose_info_seqops
);
1486 static const struct file_operations rose_info_fops
= {
1487 .owner
= THIS_MODULE
,
1488 .open
= rose_info_open
,
1490 .llseek
= seq_lseek
,
1491 .release
= seq_release
,
1493 #endif /* CONFIG_PROC_FS */
1495 static struct net_proto_family rose_family_ops
= {
1497 .create
= rose_create
,
1498 .owner
= THIS_MODULE
,
1501 static struct proto_ops rose_proto_ops
= {
1503 .owner
= THIS_MODULE
,
1504 .release
= rose_release
,
1506 .connect
= rose_connect
,
1507 .socketpair
= sock_no_socketpair
,
1508 .accept
= rose_accept
,
1509 .getname
= rose_getname
,
1510 .poll
= datagram_poll
,
1511 .ioctl
= rose_ioctl
,
1512 .listen
= rose_listen
,
1513 .shutdown
= sock_no_shutdown
,
1514 .setsockopt
= rose_setsockopt
,
1515 .getsockopt
= rose_getsockopt
,
1516 .sendmsg
= rose_sendmsg
,
1517 .recvmsg
= rose_recvmsg
,
1518 .mmap
= sock_no_mmap
,
1519 .sendpage
= sock_no_sendpage
,
1522 static struct notifier_block rose_dev_notifier
= {
1523 .notifier_call
= rose_device_event
,
1526 static struct net_device
**dev_rose
;
1528 static struct ax25_protocol rose_pid
= {
1530 .func
= rose_route_frame
1533 static struct ax25_linkfail rose_linkfail_notifier
= {
1534 .func
= rose_link_failed
1537 static int __init
rose_proto_init(void)
1542 if (rose_ndevs
> 0x7FFFFFFF/sizeof(struct net_device
*)) {
1543 printk(KERN_ERR
"ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1548 rc
= proto_register(&rose_proto
, 0);
1552 rose_callsign
= null_ax25_address
;
1554 dev_rose
= kzalloc(rose_ndevs
* sizeof(struct net_device
*), GFP_KERNEL
);
1555 if (dev_rose
== NULL
) {
1556 printk(KERN_ERR
"ROSE: rose_proto_init - unable to allocate device structure\n");
1558 goto out_proto_unregister
;
1561 for (i
= 0; i
< rose_ndevs
; i
++) {
1562 struct net_device
*dev
;
1563 char name
[IFNAMSIZ
];
1565 sprintf(name
, "rose%d", i
);
1566 dev
= alloc_netdev(sizeof(struct net_device_stats
),
1569 printk(KERN_ERR
"ROSE: rose_proto_init - unable to allocate memory\n");
1573 rc
= register_netdev(dev
);
1575 printk(KERN_ERR
"ROSE: netdevice registration failed\n");
1579 lockdep_set_class(&dev
->_xmit_lock
, &rose_netdev_xmit_lock_key
);
1583 sock_register(&rose_family_ops
);
1584 register_netdevice_notifier(&rose_dev_notifier
);
1586 ax25_register_pid(&rose_pid
);
1587 ax25_linkfail_register(&rose_linkfail_notifier
);
1589 #ifdef CONFIG_SYSCTL
1590 rose_register_sysctl();
1592 rose_loopback_init();
1594 rose_add_loopback_neigh();
1596 proc_net_fops_create(&init_net
, "rose", S_IRUGO
, &rose_info_fops
);
1597 proc_net_fops_create(&init_net
, "rose_neigh", S_IRUGO
, &rose_neigh_fops
);
1598 proc_net_fops_create(&init_net
, "rose_nodes", S_IRUGO
, &rose_nodes_fops
);
1599 proc_net_fops_create(&init_net
, "rose_routes", S_IRUGO
, &rose_routes_fops
);
1604 unregister_netdev(dev_rose
[i
]);
1605 free_netdev(dev_rose
[i
]);
1608 out_proto_unregister
:
1609 proto_unregister(&rose_proto
);
1612 module_init(rose_proto_init
);
1614 module_param(rose_ndevs
, int, 0);
1615 MODULE_PARM_DESC(rose_ndevs
, "number of ROSE devices");
1617 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1618 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1619 MODULE_LICENSE("GPL");
1620 MODULE_ALIAS_NETPROTO(PF_ROSE
);
1622 static void __exit
rose_exit(void)
1626 proc_net_remove(&init_net
, "rose");
1627 proc_net_remove(&init_net
, "rose_neigh");
1628 proc_net_remove(&init_net
, "rose_nodes");
1629 proc_net_remove(&init_net
, "rose_routes");
1630 rose_loopback_clear();
1634 ax25_protocol_release(AX25_P_ROSE
);
1635 ax25_linkfail_release(&rose_linkfail_notifier
);
1637 if (ax25cmp(&rose_callsign
, &null_ax25_address
) != 0)
1638 ax25_listen_release(&rose_callsign
, NULL
);
1640 #ifdef CONFIG_SYSCTL
1641 rose_unregister_sysctl();
1643 unregister_netdevice_notifier(&rose_dev_notifier
);
1645 sock_unregister(PF_ROSE
);
1647 for (i
= 0; i
< rose_ndevs
; i
++) {
1648 struct net_device
*dev
= dev_rose
[i
];
1651 unregister_netdev(dev
);
1657 proto_unregister(&rose_proto
);
1660 module_exit(rose_exit
);