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/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24 #include <linux/spinlock.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/stat.h>
30 #include <net/net_namespace.h>
32 #include <linux/inet.h>
33 #include <linux/netdevice.h>
34 #include <linux/if_arp.h>
35 #include <linux/skbuff.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 const 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
;
77 static struct lock_class_key rose_netdev_addr_lock_key
;
79 static void rose_set_lockdep_one(struct net_device
*dev
,
80 struct netdev_queue
*txq
,
83 lockdep_set_class(&txq
->_xmit_lock
, &rose_netdev_xmit_lock_key
);
86 static void rose_set_lockdep_key(struct net_device
*dev
)
88 lockdep_set_class(&dev
->addr_list_lock
, &rose_netdev_addr_lock_key
);
89 netdev_for_each_tx_queue(dev
, rose_set_lockdep_one
, NULL
);
93 * Convert a ROSE address into text.
95 char *rose2asc(char *buf
, const rose_address
*addr
)
97 if (addr
->rose_addr
[0] == 0x00 && addr
->rose_addr
[1] == 0x00 &&
98 addr
->rose_addr
[2] == 0x00 && addr
->rose_addr
[3] == 0x00 &&
99 addr
->rose_addr
[4] == 0x00) {
102 sprintf(buf
, "%02X%02X%02X%02X%02X", addr
->rose_addr
[0] & 0xFF,
103 addr
->rose_addr
[1] & 0xFF,
104 addr
->rose_addr
[2] & 0xFF,
105 addr
->rose_addr
[3] & 0xFF,
106 addr
->rose_addr
[4] & 0xFF);
113 * Compare two ROSE addresses, 0 == equal.
115 int rosecmp(rose_address
*addr1
, rose_address
*addr2
)
119 for (i
= 0; i
< 5; i
++)
120 if (addr1
->rose_addr
[i
] != addr2
->rose_addr
[i
])
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
129 int rosecmpm(rose_address
*addr1
, rose_address
*addr2
, unsigned short mask
)
136 for (i
= 0; i
< mask
; i
++) {
140 if ((addr1
->rose_addr
[j
] & 0x0F) != (addr2
->rose_addr
[j
] & 0x0F))
143 if ((addr1
->rose_addr
[j
] & 0xF0) != (addr2
->rose_addr
[j
] & 0xF0))
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
)
169 spin_lock_bh(&rose_list_lock
);
170 sk_for_each(s
, &rose_list
) {
171 struct rose_sock
*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
)
189 spin_lock_bh(&rose_list_lock
);
190 sk_for_each(s
, &rose_list
) {
191 struct rose_sock
*rose
= rose_sk(s
);
193 if (rose
->device
== dev
) {
194 rose_disconnect(s
, ENETUNREACH
, ROSE_OUT_OF_ORDER
, 0);
195 rose
->neighbour
->use
--;
199 spin_unlock_bh(&rose_list_lock
);
203 * Handle device status changes.
205 static int rose_device_event(struct notifier_block
*this, unsigned long event
,
208 struct net_device
*dev
= (struct net_device
*)ptr
;
210 if (!net_eq(dev_net(dev
), &init_net
))
213 if (event
!= NETDEV_DOWN
)
218 rose_kill_by_device(dev
);
221 rose_link_device_down(dev
);
222 rose_rt_device_down(dev
);
230 * Add a socket to the bound sockets list.
232 static void rose_insert_socket(struct sock
*sk
)
235 spin_lock_bh(&rose_list_lock
);
236 sk_add_node(sk
, &rose_list
);
237 spin_unlock_bh(&rose_list_lock
);
241 * Find a socket that wants to accept the Call Request we just
244 static struct sock
*rose_find_listener(rose_address
*addr
, ax25_address
*call
)
248 spin_lock_bh(&rose_list_lock
);
249 sk_for_each(s
, &rose_list
) {
250 struct rose_sock
*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
, &rose_list
) {
259 struct rose_sock
*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
)
279 spin_lock_bh(&rose_list_lock
);
280 sk_for_each(s
, &rose_list
) {
281 struct rose_sock
*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 (sk_has_allocations(sk
)) {
354 /* Defer: outstanding buffers */
355 setup_timer(&sk
->sk_timer
, rose_destroy_timer
,
357 sk
->sk_timer
.expires
= jiffies
+ 10 * HZ
;
358 add_timer(&sk
->sk_timer
);
364 * Handling for system calls applied via the various interfaces to a
365 * ROSE socket object.
368 static int rose_setsockopt(struct socket
*sock
, int level
, int optname
,
369 char __user
*optval
, unsigned int optlen
)
371 struct sock
*sk
= sock
->sk
;
372 struct rose_sock
*rose
= rose_sk(sk
);
375 if (level
!= SOL_ROSE
)
378 if (optlen
< sizeof(int))
381 if (get_user(opt
, (int __user
*)optval
))
386 rose
->defer
= opt
? 1 : 0;
416 rose
->idle
= opt
* 60 * HZ
;
420 rose
->qbitincl
= opt
? 1 : 0;
428 static int rose_getsockopt(struct socket
*sock
, int level
, int optname
,
429 char __user
*optval
, int __user
*optlen
)
431 struct sock
*sk
= sock
->sk
;
432 struct rose_sock
*rose
= rose_sk(sk
);
436 if (level
!= SOL_ROSE
)
439 if (get_user(len
, optlen
))
467 val
= rose
->idle
/ (60 * HZ
);
471 val
= rose
->qbitincl
;
478 len
= min_t(unsigned int, len
, sizeof(int));
480 if (put_user(len
, optlen
))
483 return copy_to_user(optval
, &val
, len
) ? -EFAULT
: 0;
486 static int rose_listen(struct socket
*sock
, int backlog
)
488 struct sock
*sk
= sock
->sk
;
490 if (sk
->sk_state
!= TCP_LISTEN
) {
491 struct rose_sock
*rose
= rose_sk(sk
);
493 rose
->dest_ndigis
= 0;
494 memset(&rose
->dest_addr
, 0, ROSE_ADDR_LEN
);
495 memset(&rose
->dest_call
, 0, AX25_ADDR_LEN
);
496 memset(rose
->dest_digis
, 0, AX25_ADDR_LEN
* ROSE_MAX_DIGIS
);
497 sk
->sk_max_ack_backlog
= backlog
;
498 sk
->sk_state
= TCP_LISTEN
;
505 static struct proto rose_proto
= {
507 .owner
= THIS_MODULE
,
508 .obj_size
= sizeof(struct rose_sock
),
511 static int rose_create(struct net
*net
, struct socket
*sock
, int protocol
,
515 struct rose_sock
*rose
;
517 if (!net_eq(net
, &init_net
))
518 return -EAFNOSUPPORT
;
520 if (sock
->type
!= SOCK_SEQPACKET
|| protocol
!= 0)
521 return -ESOCKTNOSUPPORT
;
523 sk
= sk_alloc(net
, PF_ROSE
, GFP_ATOMIC
, &rose_proto
);
529 sock_init_data(sock
, sk
);
531 skb_queue_head_init(&rose
->ack_queue
);
533 skb_queue_head_init(&rose
->frag_queue
);
537 sock
->ops
= &rose_proto_ops
;
538 sk
->sk_protocol
= protocol
;
540 init_timer(&rose
->timer
);
541 init_timer(&rose
->idletimer
);
543 rose
->t1
= msecs_to_jiffies(sysctl_rose_call_request_timeout
);
544 rose
->t2
= msecs_to_jiffies(sysctl_rose_reset_request_timeout
);
545 rose
->t3
= msecs_to_jiffies(sysctl_rose_clear_request_timeout
);
546 rose
->hb
= msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout
);
547 rose
->idle
= msecs_to_jiffies(sysctl_rose_no_activity_timeout
);
549 rose
->state
= ROSE_STATE_0
;
554 static struct sock
*rose_make_new(struct sock
*osk
)
557 struct rose_sock
*rose
, *orose
;
559 if (osk
->sk_type
!= SOCK_SEQPACKET
)
562 sk
= sk_alloc(sock_net(osk
), PF_ROSE
, GFP_ATOMIC
, &rose_proto
);
568 sock_init_data(NULL
, sk
);
570 skb_queue_head_init(&rose
->ack_queue
);
572 skb_queue_head_init(&rose
->frag_queue
);
576 sk
->sk_type
= osk
->sk_type
;
577 sk
->sk_priority
= osk
->sk_priority
;
578 sk
->sk_protocol
= osk
->sk_protocol
;
579 sk
->sk_rcvbuf
= osk
->sk_rcvbuf
;
580 sk
->sk_sndbuf
= osk
->sk_sndbuf
;
581 sk
->sk_state
= TCP_ESTABLISHED
;
582 sock_copy_flags(sk
, osk
);
584 init_timer(&rose
->timer
);
585 init_timer(&rose
->idletimer
);
587 orose
= rose_sk(osk
);
588 rose
->t1
= orose
->t1
;
589 rose
->t2
= orose
->t2
;
590 rose
->t3
= orose
->t3
;
591 rose
->hb
= orose
->hb
;
592 rose
->idle
= orose
->idle
;
593 rose
->defer
= orose
->defer
;
594 rose
->device
= orose
->device
;
595 rose
->qbitincl
= orose
->qbitincl
;
600 static int rose_release(struct socket
*sock
)
602 struct sock
*sk
= sock
->sk
;
603 struct rose_sock
*rose
;
605 if (sk
== NULL
) return 0;
612 switch (rose
->state
) {
615 rose_disconnect(sk
, 0, -1, -1);
617 rose_destroy_socket(sk
);
621 rose
->neighbour
->use
--;
623 rose_disconnect(sk
, 0, -1, -1);
625 rose_destroy_socket(sk
);
632 rose_clear_queues(sk
);
633 rose_stop_idletimer(sk
);
634 rose_write_internal(sk
, ROSE_CLEAR_REQUEST
);
635 rose_start_t3timer(sk
);
636 rose
->state
= ROSE_STATE_2
;
637 sk
->sk_state
= TCP_CLOSE
;
638 sk
->sk_shutdown
|= SEND_SHUTDOWN
;
639 sk
->sk_state_change(sk
);
640 sock_set_flag(sk
, SOCK_DEAD
);
641 sock_set_flag(sk
, SOCK_DESTROY
);
655 static int rose_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
657 struct sock
*sk
= sock
->sk
;
658 struct rose_sock
*rose
= rose_sk(sk
);
659 struct sockaddr_rose
*addr
= (struct sockaddr_rose
*)uaddr
;
660 struct net_device
*dev
;
661 ax25_address
*source
;
662 ax25_uid_assoc
*user
;
665 if (!sock_flag(sk
, SOCK_ZAPPED
))
668 if (addr_len
!= sizeof(struct sockaddr_rose
) && addr_len
!= sizeof(struct full_sockaddr_rose
))
671 if (addr
->srose_family
!= AF_ROSE
)
674 if (addr_len
== sizeof(struct sockaddr_rose
) && addr
->srose_ndigis
> 1)
677 if ((unsigned int) addr
->srose_ndigis
> ROSE_MAX_DIGIS
)
680 if ((dev
= rose_dev_get(&addr
->srose_addr
)) == NULL
)
681 return -EADDRNOTAVAIL
;
683 source
= &addr
->srose_call
;
685 user
= ax25_findbyuid(current_euid());
687 rose
->source_call
= user
->call
;
690 if (ax25_uid_policy
&& !capable(CAP_NET_BIND_SERVICE
))
692 rose
->source_call
= *source
;
695 rose
->source_addr
= addr
->srose_addr
;
697 rose
->source_ndigis
= addr
->srose_ndigis
;
699 if (addr_len
== sizeof(struct full_sockaddr_rose
)) {
700 struct full_sockaddr_rose
*full_addr
= (struct full_sockaddr_rose
*)uaddr
;
701 for (n
= 0 ; n
< addr
->srose_ndigis
; n
++)
702 rose
->source_digis
[n
] = full_addr
->srose_digis
[n
];
704 if (rose
->source_ndigis
== 1) {
705 rose
->source_digis
[0] = addr
->srose_digi
;
709 rose_insert_socket(sk
);
711 sock_reset_flag(sk
, SOCK_ZAPPED
);
716 static int rose_connect(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
, int flags
)
718 struct sock
*sk
= sock
->sk
;
719 struct rose_sock
*rose
= rose_sk(sk
);
720 struct sockaddr_rose
*addr
= (struct sockaddr_rose
*)uaddr
;
721 unsigned char cause
, diagnostic
;
722 struct net_device
*dev
;
723 ax25_uid_assoc
*user
;
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 ((unsigned int) 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
)
744 if (sk
->sk_state
== TCP_ESTABLISHED
&& sock
->state
== SS_CONNECTING
) {
745 /* Connect completed during a ERESTARTSYS event */
746 sock
->state
= SS_CONNECTED
;
750 if (sk
->sk_state
== TCP_CLOSE
&& sock
->state
== SS_CONNECTING
) {
751 sock
->state
= SS_UNCONNECTED
;
756 if (sk
->sk_state
== TCP_ESTABLISHED
) {
757 /* No reconnect on a seqpacket socket */
762 sk
->sk_state
= TCP_CLOSE
;
763 sock
->state
= SS_UNCONNECTED
;
765 rose
->neighbour
= rose_get_neigh(&addr
->srose_addr
, &cause
,
767 if (!rose
->neighbour
) {
772 rose
->lci
= rose_new_lci(rose
->neighbour
);
778 if (sock_flag(sk
, SOCK_ZAPPED
)) { /* Must bind first - autobinding in this may or may not work */
779 sock_reset_flag(sk
, SOCK_ZAPPED
);
781 if ((dev
= rose_dev_first()) == NULL
) {
786 user
= ax25_findbyuid(current_euid());
792 memcpy(&rose
->source_addr
, dev
->dev_addr
, ROSE_ADDR_LEN
);
793 rose
->source_call
= user
->call
;
797 rose_insert_socket(sk
); /* Finish the bind */
799 rose
->dest_addr
= addr
->srose_addr
;
800 rose
->dest_call
= addr
->srose_call
;
801 rose
->rand
= ((long)rose
& 0xFFFF) + rose
->lci
;
802 rose
->dest_ndigis
= addr
->srose_ndigis
;
804 if (addr_len
== sizeof(struct full_sockaddr_rose
)) {
805 struct full_sockaddr_rose
*full_addr
= (struct full_sockaddr_rose
*)uaddr
;
806 for (n
= 0 ; n
< addr
->srose_ndigis
; n
++)
807 rose
->dest_digis
[n
] = full_addr
->srose_digis
[n
];
809 if (rose
->dest_ndigis
== 1) {
810 rose
->dest_digis
[0] = addr
->srose_digi
;
814 /* Move to connecting socket, start sending Connect Requests */
815 sock
->state
= SS_CONNECTING
;
816 sk
->sk_state
= TCP_SYN_SENT
;
818 rose
->state
= ROSE_STATE_1
;
820 rose
->neighbour
->use
++;
822 rose_write_internal(sk
, ROSE_CALL_REQUEST
);
823 rose_start_heartbeat(sk
);
824 rose_start_t1timer(sk
);
827 if (sk
->sk_state
!= TCP_ESTABLISHED
&& (flags
& O_NONBLOCK
)) {
833 * A Connect Ack with Choke or timeout or failed routing will go to
836 if (sk
->sk_state
== TCP_SYN_SENT
) {
840 prepare_to_wait(sk_sleep(sk
), &wait
,
842 if (sk
->sk_state
!= TCP_SYN_SENT
)
844 if (!signal_pending(current
)) {
853 finish_wait(sk_sleep(sk
), &wait
);
859 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
860 sock
->state
= SS_UNCONNECTED
;
861 err
= sock_error(sk
); /* Always set at this point */
865 sock
->state
= SS_CONNECTED
;
873 static int rose_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
881 if ((sk
= sock
->sk
) == NULL
)
885 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
890 if (sk
->sk_state
!= TCP_LISTEN
) {
896 * The write queue this time is holding sockets ready to use
897 * hooked into the SABM we saved
900 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
902 skb
= skb_dequeue(&sk
->sk_receive_queue
);
906 if (flags
& O_NONBLOCK
) {
910 if (!signal_pending(current
)) {
919 finish_wait(sk_sleep(sk
), &wait
);
924 sock_graft(newsk
, newsock
);
926 /* Now attach up the new socket */
929 sk
->sk_ack_backlog
--;
937 static int rose_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
938 int *uaddr_len
, int peer
)
940 struct full_sockaddr_rose
*srose
= (struct full_sockaddr_rose
*)uaddr
;
941 struct sock
*sk
= sock
->sk
;
942 struct rose_sock
*rose
= rose_sk(sk
);
945 memset(srose
, 0, sizeof(*srose
));
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 if (!rose_parse_facilities(skb
->data
+ ROSE_CALL_REQ_FACILITIES_OFF
,
984 skb
->len
- ROSE_CALL_REQ_FACILITIES_OFF
,
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 /* Build a packet */
1106 /* Sanity check the packet size */
1110 size
= len
+ AX25_BPQ_HEADER_LEN
+ AX25_MAX_HEADER_LEN
+ ROSE_MIN_LEN
;
1112 if ((skb
= sock_alloc_send_skb(sk
, size
, msg
->msg_flags
& MSG_DONTWAIT
, &err
)) == NULL
)
1115 skb_reserve(skb
, AX25_BPQ_HEADER_LEN
+ AX25_MAX_HEADER_LEN
+ ROSE_MIN_LEN
);
1118 * Put the data on the end
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 /* Build a ROSE Network header */
1145 asmptr
[0] = ((rose
->lci
>> 8) & 0x0F) | ROSE_GFI
;
1146 asmptr
[1] = (rose
->lci
>> 0) & 0xFF;
1147 asmptr
[2] = ROSE_DATA
;
1150 asmptr
[0] |= ROSE_Q_BIT
;
1152 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1158 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159 if (skb
->len
- ROSE_MIN_LEN
> ROSE_PACLEN
) {
1160 unsigned char header
[ROSE_MIN_LEN
];
1161 struct sk_buff
*skbn
;
1165 /* Save a copy of the Header */
1166 skb_copy_from_linear_data(skb
, header
, ROSE_MIN_LEN
);
1167 skb_pull(skb
, ROSE_MIN_LEN
);
1169 frontlen
= skb_headroom(skb
);
1171 while (skb
->len
> 0) {
1172 if ((skbn
= sock_alloc_send_skb(sk
, frontlen
+ ROSE_PACLEN
, 0, &err
)) == NULL
) {
1181 skb_reserve(skbn
, frontlen
);
1183 lg
= (ROSE_PACLEN
> skb
->len
) ? skb
->len
: ROSE_PACLEN
;
1185 /* Copy the user data */
1186 skb_copy_from_linear_data(skb
, skb_put(skbn
, lg
), lg
);
1189 /* Duplicate the Header */
1190 skb_push(skbn
, ROSE_MIN_LEN
);
1191 skb_copy_to_linear_data(skbn
, header
, ROSE_MIN_LEN
);
1194 skbn
->data
[2] |= M_BIT
;
1196 skb_queue_tail(&sk
->sk_write_queue
, skbn
); /* Throw it on the queue */
1202 skb_queue_tail(&sk
->sk_write_queue
, skb
); /* Throw it on the queue */
1205 skb_queue_tail(&sk
->sk_write_queue
, skb
); /* Shove it onto the queue */
1214 static int rose_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
1215 struct msghdr
*msg
, size_t size
, int flags
)
1217 struct sock
*sk
= sock
->sk
;
1218 struct rose_sock
*rose
= rose_sk(sk
);
1219 struct sockaddr_rose
*srose
= (struct sockaddr_rose
*)msg
->msg_name
;
1221 unsigned char *asmptr
;
1222 struct sk_buff
*skb
;
1226 * This works for seqpacket too. The receiver has ordered the queue for
1227 * us! We do one quick check first though
1229 if (sk
->sk_state
!= TCP_ESTABLISHED
)
1232 /* Now we can treat all alike */
1233 if ((skb
= skb_recv_datagram(sk
, flags
& ~MSG_DONTWAIT
, flags
& MSG_DONTWAIT
, &er
)) == NULL
)
1236 qbit
= (skb
->data
[0] & ROSE_Q_BIT
) == ROSE_Q_BIT
;
1238 skb_pull(skb
, ROSE_MIN_LEN
);
1240 if (rose
->qbitincl
) {
1241 asmptr
= skb_push(skb
, 1);
1245 skb_reset_transport_header(skb
);
1248 if (copied
> size
) {
1250 msg
->msg_flags
|= MSG_TRUNC
;
1253 skb_copy_datagram_iovec(skb
, 0, msg
->msg_iov
, copied
);
1255 if (srose
!= NULL
) {
1256 srose
->srose_family
= AF_ROSE
;
1257 srose
->srose_addr
= rose
->dest_addr
;
1258 srose
->srose_call
= rose
->dest_call
;
1259 srose
->srose_ndigis
= rose
->dest_ndigis
;
1260 if (msg
->msg_namelen
>= sizeof(struct full_sockaddr_rose
)) {
1261 struct full_sockaddr_rose
*full_srose
= (struct full_sockaddr_rose
*)msg
->msg_name
;
1262 for (n
= 0 ; n
< rose
->dest_ndigis
; n
++)
1263 full_srose
->srose_digis
[n
] = rose
->dest_digis
[n
];
1264 msg
->msg_namelen
= sizeof(struct full_sockaddr_rose
);
1266 if (rose
->dest_ndigis
>= 1) {
1267 srose
->srose_ndigis
= 1;
1268 srose
->srose_digi
= rose
->dest_digis
[0];
1270 msg
->msg_namelen
= sizeof(struct sockaddr_rose
);
1274 skb_free_datagram(sk
, skb
);
1280 static int rose_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
1282 struct sock
*sk
= sock
->sk
;
1283 struct rose_sock
*rose
= rose_sk(sk
);
1284 void __user
*argp
= (void __user
*)arg
;
1290 amount
= sk
->sk_sndbuf
- sk_wmem_alloc_get(sk
);
1293 return put_user(amount
, (unsigned int __user
*) argp
);
1297 struct sk_buff
*skb
;
1299 /* These two are safe on a single CPU system as only user tasks fiddle here */
1300 if ((skb
= skb_peek(&sk
->sk_receive_queue
)) != NULL
)
1302 return put_user(amount
, (unsigned int __user
*) argp
);
1306 return sock_get_timestamp(sk
, (struct timeval __user
*) argp
);
1309 return sock_get_timestampns(sk
, (struct timespec __user
*) argp
);
1313 case SIOCGIFDSTADDR
:
1314 case SIOCSIFDSTADDR
:
1315 case SIOCGIFBRDADDR
:
1316 case SIOCSIFBRDADDR
:
1317 case SIOCGIFNETMASK
:
1318 case SIOCSIFNETMASK
:
1326 if (!capable(CAP_NET_ADMIN
))
1328 return rose_rt_ioctl(cmd
, argp
);
1330 case SIOCRSGCAUSE
: {
1331 struct rose_cause_struct rose_cause
;
1332 rose_cause
.cause
= rose
->cause
;
1333 rose_cause
.diagnostic
= rose
->diagnostic
;
1334 return copy_to_user(argp
, &rose_cause
, sizeof(struct rose_cause_struct
)) ? -EFAULT
: 0;
1337 case SIOCRSSCAUSE
: {
1338 struct rose_cause_struct rose_cause
;
1339 if (copy_from_user(&rose_cause
, argp
, sizeof(struct rose_cause_struct
)))
1341 rose
->cause
= rose_cause
.cause
;
1342 rose
->diagnostic
= rose_cause
.diagnostic
;
1347 if (!capable(CAP_NET_ADMIN
)) return -EPERM
;
1348 if (ax25cmp(&rose_callsign
, &null_ax25_address
) != 0)
1349 ax25_listen_release(&rose_callsign
, NULL
);
1350 if (copy_from_user(&rose_callsign
, argp
, sizeof(ax25_address
)))
1352 if (ax25cmp(&rose_callsign
, &null_ax25_address
) != 0)
1353 return ax25_listen_register(&rose_callsign
, NULL
);
1358 return copy_to_user(argp
, &rose_callsign
, sizeof(ax25_address
)) ? -EFAULT
: 0;
1361 if (rose
->state
== ROSE_STATE_5
) {
1362 rose_write_internal(sk
, ROSE_CALL_ACCEPTED
);
1363 rose_start_idletimer(sk
);
1364 rose
->condition
= 0x00;
1369 rose
->state
= ROSE_STATE_3
;
1374 return -ENOIOCTLCMD
;
1380 #ifdef CONFIG_PROC_FS
1381 static void *rose_info_start(struct seq_file
*seq
, loff_t
*pos
)
1382 __acquires(rose_list_lock
)
1384 spin_lock_bh(&rose_list_lock
);
1385 return seq_hlist_start_head(&rose_list
, *pos
);
1388 static void *rose_info_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1390 return seq_hlist_next(v
, &rose_list
, pos
);
1393 static void rose_info_stop(struct seq_file
*seq
, void *v
)
1394 __releases(rose_list_lock
)
1396 spin_unlock_bh(&rose_list_lock
);
1399 static int rose_info_show(struct seq_file
*seq
, void *v
)
1401 char buf
[11], rsbuf
[11];
1403 if (v
== SEQ_START_TOKEN
)
1405 "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");
1408 struct sock
*s
= sk_entry(v
);
1409 struct rose_sock
*rose
= rose_sk(s
);
1410 const char *devname
, *callsign
;
1411 const struct net_device
*dev
= rose
->device
;
1416 devname
= dev
->name
;
1418 seq_printf(seq
, "%-10s %-9s ",
1419 rose2asc(rsbuf
, &rose
->dest_addr
),
1420 ax2asc(buf
, &rose
->dest_call
));
1422 if (ax25cmp(&rose
->source_call
, &null_ax25_address
) == 0)
1423 callsign
= "??????-?";
1425 callsign
= ax2asc(buf
, &rose
->source_call
);
1428 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1429 rose2asc(rsbuf
, &rose
->source_addr
),
1433 (rose
->neighbour
) ? rose
->neighbour
->number
: 0,
1438 ax25_display_timer(&rose
->timer
) / HZ
,
1443 ax25_display_timer(&rose
->idletimer
) / (60 * HZ
),
1444 rose
->idle
/ (60 * HZ
),
1445 sk_wmem_alloc_get(s
),
1446 sk_rmem_alloc_get(s
),
1447 s
->sk_socket
? SOCK_INODE(s
->sk_socket
)->i_ino
: 0L);
1453 static const struct seq_operations rose_info_seqops
= {
1454 .start
= rose_info_start
,
1455 .next
= rose_info_next
,
1456 .stop
= rose_info_stop
,
1457 .show
= rose_info_show
,
1460 static int rose_info_open(struct inode
*inode
, struct file
*file
)
1462 return seq_open(file
, &rose_info_seqops
);
1465 static const struct file_operations rose_info_fops
= {
1466 .owner
= THIS_MODULE
,
1467 .open
= rose_info_open
,
1469 .llseek
= seq_lseek
,
1470 .release
= seq_release
,
1472 #endif /* CONFIG_PROC_FS */
1474 static const struct net_proto_family rose_family_ops
= {
1476 .create
= rose_create
,
1477 .owner
= THIS_MODULE
,
1480 static const struct proto_ops rose_proto_ops
= {
1482 .owner
= THIS_MODULE
,
1483 .release
= rose_release
,
1485 .connect
= rose_connect
,
1486 .socketpair
= sock_no_socketpair
,
1487 .accept
= rose_accept
,
1488 .getname
= rose_getname
,
1489 .poll
= datagram_poll
,
1490 .ioctl
= rose_ioctl
,
1491 .listen
= rose_listen
,
1492 .shutdown
= sock_no_shutdown
,
1493 .setsockopt
= rose_setsockopt
,
1494 .getsockopt
= rose_getsockopt
,
1495 .sendmsg
= rose_sendmsg
,
1496 .recvmsg
= rose_recvmsg
,
1497 .mmap
= sock_no_mmap
,
1498 .sendpage
= sock_no_sendpage
,
1501 static struct notifier_block rose_dev_notifier
= {
1502 .notifier_call
= rose_device_event
,
1505 static struct net_device
**dev_rose
;
1507 static struct ax25_protocol rose_pid
= {
1509 .func
= rose_route_frame
1512 static struct ax25_linkfail rose_linkfail_notifier
= {
1513 .func
= rose_link_failed
1516 static int __init
rose_proto_init(void)
1521 if (rose_ndevs
> 0x7FFFFFFF/sizeof(struct net_device
*)) {
1522 printk(KERN_ERR
"ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1527 rc
= proto_register(&rose_proto
, 0);
1531 rose_callsign
= null_ax25_address
;
1533 dev_rose
= kzalloc(rose_ndevs
* sizeof(struct net_device
*), GFP_KERNEL
);
1534 if (dev_rose
== NULL
) {
1535 printk(KERN_ERR
"ROSE: rose_proto_init - unable to allocate device structure\n");
1537 goto out_proto_unregister
;
1540 for (i
= 0; i
< rose_ndevs
; i
++) {
1541 struct net_device
*dev
;
1542 char name
[IFNAMSIZ
];
1544 sprintf(name
, "rose%d", i
);
1545 dev
= alloc_netdev(0, name
, rose_setup
);
1547 printk(KERN_ERR
"ROSE: rose_proto_init - unable to allocate memory\n");
1551 rc
= register_netdev(dev
);
1553 printk(KERN_ERR
"ROSE: netdevice registration failed\n");
1557 rose_set_lockdep_key(dev
);
1561 sock_register(&rose_family_ops
);
1562 register_netdevice_notifier(&rose_dev_notifier
);
1564 ax25_register_pid(&rose_pid
);
1565 ax25_linkfail_register(&rose_linkfail_notifier
);
1567 #ifdef CONFIG_SYSCTL
1568 rose_register_sysctl();
1570 rose_loopback_init();
1572 rose_add_loopback_neigh();
1574 proc_create("rose", S_IRUGO
, init_net
.proc_net
, &rose_info_fops
);
1575 proc_create("rose_neigh", S_IRUGO
, init_net
.proc_net
,
1577 proc_create("rose_nodes", S_IRUGO
, init_net
.proc_net
,
1579 proc_create("rose_routes", S_IRUGO
, init_net
.proc_net
,
1585 unregister_netdev(dev_rose
[i
]);
1586 free_netdev(dev_rose
[i
]);
1589 out_proto_unregister
:
1590 proto_unregister(&rose_proto
);
1593 module_init(rose_proto_init
);
1595 module_param(rose_ndevs
, int, 0);
1596 MODULE_PARM_DESC(rose_ndevs
, "number of ROSE devices");
1598 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1599 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1600 MODULE_LICENSE("GPL");
1601 MODULE_ALIAS_NETPROTO(PF_ROSE
);
1603 static void __exit
rose_exit(void)
1607 remove_proc_entry("rose", init_net
.proc_net
);
1608 remove_proc_entry("rose_neigh", init_net
.proc_net
);
1609 remove_proc_entry("rose_nodes", init_net
.proc_net
);
1610 remove_proc_entry("rose_routes", init_net
.proc_net
);
1611 rose_loopback_clear();
1615 ax25_protocol_release(AX25_P_ROSE
);
1616 ax25_linkfail_release(&rose_linkfail_notifier
);
1618 if (ax25cmp(&rose_callsign
, &null_ax25_address
) != 0)
1619 ax25_listen_release(&rose_callsign
, NULL
);
1621 #ifdef CONFIG_SYSCTL
1622 rose_unregister_sysctl();
1624 unregister_netdevice_notifier(&rose_dev_notifier
);
1626 sock_unregister(PF_ROSE
);
1628 for (i
= 0; i
< rose_ndevs
; i
++) {
1629 struct net_device
*dev
= dev_rose
[i
];
1632 unregister_netdev(dev
);
1638 proto_unregister(&rose_proto
);
1641 module_exit(rose_exit
);