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 Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/capability.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/socket.h>
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
20 #include <linux/timer.h>
21 #include <linux/string.h>
22 #include <linux/sockios.h>
23 #include <linux/net.h>
24 #include <linux/stat.h>
26 #include <linux/inet.h>
27 #include <linux/netdevice.h>
28 #include <linux/if_arp.h>
29 #include <linux/skbuff.h>
31 #include <asm/uaccess.h>
32 #include <asm/system.h>
33 #include <linux/fcntl.h>
34 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
36 #include <linux/interrupt.h>
37 #include <linux/notifier.h>
38 #include <net/netrom.h>
39 #include <linux/proc_fs.h>
40 #include <linux/seq_file.h>
42 #include <net/tcp_states.h>
44 #include <linux/init.h>
46 static int nr_ndevs
= 4;
48 int sysctl_netrom_default_path_quality
= NR_DEFAULT_QUAL
;
49 int sysctl_netrom_obsolescence_count_initialiser
= NR_DEFAULT_OBS
;
50 int sysctl_netrom_network_ttl_initialiser
= NR_DEFAULT_TTL
;
51 int sysctl_netrom_transport_timeout
= NR_DEFAULT_T1
;
52 int sysctl_netrom_transport_maximum_tries
= NR_DEFAULT_N2
;
53 int sysctl_netrom_transport_acknowledge_delay
= NR_DEFAULT_T2
;
54 int sysctl_netrom_transport_busy_delay
= NR_DEFAULT_T4
;
55 int sysctl_netrom_transport_requested_window_size
= NR_DEFAULT_WINDOW
;
56 int sysctl_netrom_transport_no_activity_timeout
= NR_DEFAULT_IDLE
;
57 int sysctl_netrom_routing_control
= NR_DEFAULT_ROUTING
;
58 int sysctl_netrom_link_fails_count
= NR_DEFAULT_FAILS
;
59 int sysctl_netrom_reset_circuit
= NR_DEFAULT_RESET
;
61 static unsigned short circuit
= 0x101;
63 static HLIST_HEAD(nr_list
);
64 static DEFINE_SPINLOCK(nr_list_lock
);
66 static const struct proto_ops nr_proto_ops
;
69 * Socket removal during an interrupt is now safe.
71 static void nr_remove_socket(struct sock
*sk
)
73 spin_lock_bh(&nr_list_lock
);
75 spin_unlock_bh(&nr_list_lock
);
79 * Kill all bound sockets on a dropped device.
81 static void nr_kill_by_device(struct net_device
*dev
)
84 struct hlist_node
*node
;
86 spin_lock_bh(&nr_list_lock
);
87 sk_for_each(s
, node
, &nr_list
)
88 if (nr_sk(s
)->device
== dev
)
89 nr_disconnect(s
, ENETUNREACH
);
90 spin_unlock_bh(&nr_list_lock
);
94 * Handle device status changes.
96 static int nr_device_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
98 struct net_device
*dev
= (struct net_device
*)ptr
;
100 if (event
!= NETDEV_DOWN
)
103 nr_kill_by_device(dev
);
104 nr_rt_device_down(dev
);
110 * Add a socket to the bound sockets list.
112 static void nr_insert_socket(struct sock
*sk
)
114 spin_lock_bh(&nr_list_lock
);
115 sk_add_node(sk
, &nr_list
);
116 spin_unlock_bh(&nr_list_lock
);
120 * Find a socket that wants to accept the Connect Request we just
123 static struct sock
*nr_find_listener(ax25_address
*addr
)
126 struct hlist_node
*node
;
128 spin_lock_bh(&nr_list_lock
);
129 sk_for_each(s
, node
, &nr_list
)
130 if (!ax25cmp(&nr_sk(s
)->source_addr
, addr
) &&
131 s
->sk_state
== TCP_LISTEN
) {
137 spin_unlock_bh(&nr_list_lock
);
142 * Find a connected NET/ROM socket given my circuit IDs.
144 static struct sock
*nr_find_socket(unsigned char index
, unsigned char id
)
147 struct hlist_node
*node
;
149 spin_lock_bh(&nr_list_lock
);
150 sk_for_each(s
, node
, &nr_list
) {
151 struct nr_sock
*nr
= nr_sk(s
);
153 if (nr
->my_index
== index
&& nr
->my_id
== id
) {
160 spin_unlock_bh(&nr_list_lock
);
165 * Find a connected NET/ROM socket given their circuit IDs.
167 static struct sock
*nr_find_peer(unsigned char index
, unsigned char id
,
171 struct hlist_node
*node
;
173 spin_lock_bh(&nr_list_lock
);
174 sk_for_each(s
, node
, &nr_list
) {
175 struct nr_sock
*nr
= nr_sk(s
);
177 if (nr
->your_index
== index
&& nr
->your_id
== id
&&
178 !ax25cmp(&nr
->dest_addr
, dest
)) {
185 spin_unlock_bh(&nr_list_lock
);
190 * Find next free circuit ID.
192 static unsigned short nr_find_next_circuit(void)
194 unsigned short id
= circuit
;
202 if (i
!= 0 && j
!= 0) {
203 if ((sk
=nr_find_socket(i
, j
)) == NULL
)
217 void nr_destroy_socket(struct sock
*);
220 * Handler for deferred kills.
222 static void nr_destroy_timer(unsigned long data
)
224 struct sock
*sk
=(struct sock
*)data
;
227 nr_destroy_socket(sk
);
233 * This is called from user mode and the timers. Thus it protects itself
234 * against interrupt users but doesn't worry about being called during
235 * work. Once it is removed from the queue no interrupt or bottom half
236 * will touch it and we are (fairly 8-) ) safe.
238 void nr_destroy_socket(struct sock
*sk
)
242 nr_remove_socket(sk
);
244 nr_stop_heartbeat(sk
);
248 nr_stop_idletimer(sk
);
250 nr_clear_queues(sk
); /* Flush the queues */
252 while ((skb
= skb_dequeue(&sk
->sk_receive_queue
)) != NULL
) {
253 if (skb
->sk
!= sk
) { /* A pending connection */
254 /* Queue the unaccepted socket for death */
255 sock_set_flag(skb
->sk
, SOCK_DEAD
);
256 nr_start_heartbeat(skb
->sk
);
257 nr_sk(skb
->sk
)->state
= NR_STATE_0
;
263 if (atomic_read(&sk
->sk_wmem_alloc
) ||
264 atomic_read(&sk
->sk_rmem_alloc
)) {
265 /* Defer: outstanding buffers */
266 sk
->sk_timer
.function
= nr_destroy_timer
;
267 sk
->sk_timer
.expires
= jiffies
+ 2 * HZ
;
268 add_timer(&sk
->sk_timer
);
274 * Handling for system calls applied via the various interfaces to a
275 * NET/ROM socket object.
278 static int nr_setsockopt(struct socket
*sock
, int level
, int optname
,
279 char __user
*optval
, int optlen
)
281 struct sock
*sk
= sock
->sk
;
282 struct nr_sock
*nr
= nr_sk(sk
);
285 if (level
!= SOL_NETROM
)
288 if (optlen
< sizeof(int))
291 if (get_user(opt
, (int __user
*)optval
))
308 if (opt
< 1 || opt
> 31)
322 nr
->idle
= opt
* 60 * HZ
;
330 static int nr_getsockopt(struct socket
*sock
, int level
, int optname
,
331 char __user
*optval
, int __user
*optlen
)
333 struct sock
*sk
= sock
->sk
;
334 struct nr_sock
*nr
= nr_sk(sk
);
338 if (level
!= SOL_NETROM
)
341 if (get_user(len
, optlen
))
365 val
= nr
->idle
/ (60 * HZ
);
372 len
= min_t(unsigned int, len
, sizeof(int));
374 if (put_user(len
, optlen
))
377 return copy_to_user(optval
, &val
, len
) ? -EFAULT
: 0;
380 static int nr_listen(struct socket
*sock
, int backlog
)
382 struct sock
*sk
= sock
->sk
;
385 if (sk
->sk_state
!= TCP_LISTEN
) {
386 memset(&nr_sk(sk
)->user_addr
, 0, AX25_ADDR_LEN
);
387 sk
->sk_max_ack_backlog
= backlog
;
388 sk
->sk_state
= TCP_LISTEN
;
397 static struct proto nr_proto
= {
399 .owner
= THIS_MODULE
,
400 .obj_size
= sizeof(struct nr_sock
),
403 static int nr_create(struct socket
*sock
, int protocol
)
408 if (sock
->type
!= SOCK_SEQPACKET
|| protocol
!= 0)
409 return -ESOCKTNOSUPPORT
;
411 if ((sk
= sk_alloc(PF_NETROM
, GFP_ATOMIC
, &nr_proto
, 1)) == NULL
)
416 sock_init_data(sock
, sk
);
418 sock
->ops
= &nr_proto_ops
;
419 sk
->sk_protocol
= protocol
;
421 skb_queue_head_init(&nr
->ack_queue
);
422 skb_queue_head_init(&nr
->reseq_queue
);
423 skb_queue_head_init(&nr
->frag_queue
);
428 msecs_to_jiffies(sysctl_netrom_transport_timeout
);
430 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay
);
432 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries
);
434 msecs_to_jiffies(sysctl_netrom_transport_busy_delay
);
436 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout
);
437 nr
->window
= sysctl_netrom_transport_requested_window_size
;
440 nr
->state
= NR_STATE_0
;
445 static struct sock
*nr_make_new(struct sock
*osk
)
448 struct nr_sock
*nr
, *onr
;
450 if (osk
->sk_type
!= SOCK_SEQPACKET
)
453 if ((sk
= sk_alloc(PF_NETROM
, GFP_ATOMIC
, osk
->sk_prot
, 1)) == NULL
)
458 sock_init_data(NULL
, sk
);
460 sk
->sk_type
= osk
->sk_type
;
461 sk
->sk_socket
= osk
->sk_socket
;
462 sk
->sk_priority
= osk
->sk_priority
;
463 sk
->sk_protocol
= osk
->sk_protocol
;
464 sk
->sk_rcvbuf
= osk
->sk_rcvbuf
;
465 sk
->sk_sndbuf
= osk
->sk_sndbuf
;
466 sk
->sk_state
= TCP_ESTABLISHED
;
467 sk
->sk_sleep
= osk
->sk_sleep
;
468 sock_copy_flags(sk
, osk
);
470 skb_queue_head_init(&nr
->ack_queue
);
471 skb_queue_head_init(&nr
->reseq_queue
);
472 skb_queue_head_init(&nr
->frag_queue
);
482 nr
->idle
= onr
->idle
;
483 nr
->window
= onr
->window
;
485 nr
->device
= onr
->device
;
486 nr
->bpqext
= onr
->bpqext
;
491 static int nr_release(struct socket
*sock
)
493 struct sock
*sk
= sock
->sk
;
496 if (sk
== NULL
) return 0;
506 nr_disconnect(sk
, 0);
507 nr_destroy_socket(sk
);
513 nr_write_internal(sk
, NR_DISCREQ
);
514 nr_start_t1timer(sk
);
517 nr_stop_idletimer(sk
);
518 nr
->state
= NR_STATE_2
;
519 sk
->sk_state
= TCP_CLOSE
;
520 sk
->sk_shutdown
|= SEND_SHUTDOWN
;
521 sk
->sk_state_change(sk
);
523 sock_set_flag(sk
, SOCK_DESTROY
);
524 sk
->sk_socket
= NULL
;
528 sk
->sk_socket
= NULL
;
539 static int nr_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
541 struct sock
*sk
= sock
->sk
;
542 struct nr_sock
*nr
= nr_sk(sk
);
543 struct full_sockaddr_ax25
*addr
= (struct full_sockaddr_ax25
*)uaddr
;
544 struct net_device
*dev
;
545 ax25_uid_assoc
*user
;
546 ax25_address
*source
;
549 if (!sock_flag(sk
, SOCK_ZAPPED
)) {
553 if (addr_len
< sizeof(struct sockaddr_ax25
) || addr_len
> sizeof(struct full_sockaddr_ax25
)) {
557 if (addr_len
< (addr
->fsa_ax25
.sax25_ndigis
* sizeof(ax25_address
) + sizeof(struct sockaddr_ax25
))) {
561 if (addr
->fsa_ax25
.sax25_family
!= AF_NETROM
) {
565 if ((dev
= nr_dev_get(&addr
->fsa_ax25
.sax25_call
)) == NULL
) {
566 SOCK_DEBUG(sk
, "NET/ROM: bind failed: invalid node callsign\n");
568 return -EADDRNOTAVAIL
;
572 * Only the super user can set an arbitrary user callsign.
574 if (addr
->fsa_ax25
.sax25_ndigis
== 1) {
575 if (!capable(CAP_NET_BIND_SERVICE
)) {
580 nr
->user_addr
= addr
->fsa_digipeater
[0];
581 nr
->source_addr
= addr
->fsa_ax25
.sax25_call
;
583 source
= &addr
->fsa_ax25
.sax25_call
;
585 user
= ax25_findbyuid(current
->euid
);
587 nr
->user_addr
= user
->call
;
590 if (ax25_uid_policy
&& !capable(CAP_NET_BIND_SERVICE
)) {
595 nr
->user_addr
= *source
;
598 nr
->source_addr
= *source
;
602 nr_insert_socket(sk
);
604 sock_reset_flag(sk
, SOCK_ZAPPED
);
607 SOCK_DEBUG(sk
, "NET/ROM: socket is bound\n");
611 static int nr_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
612 int addr_len
, int flags
)
614 struct sock
*sk
= sock
->sk
;
615 struct nr_sock
*nr
= nr_sk(sk
);
616 struct sockaddr_ax25
*addr
= (struct sockaddr_ax25
*)uaddr
;
617 ax25_address
*source
= NULL
;
618 ax25_uid_assoc
*user
;
619 struct net_device
*dev
;
622 if (sk
->sk_state
== TCP_ESTABLISHED
&& sock
->state
== SS_CONNECTING
) {
623 sock
->state
= SS_CONNECTED
;
625 return 0; /* Connect completed during a ERESTARTSYS event */
628 if (sk
->sk_state
== TCP_CLOSE
&& sock
->state
== SS_CONNECTING
) {
629 sock
->state
= SS_UNCONNECTED
;
631 return -ECONNREFUSED
;
634 if (sk
->sk_state
== TCP_ESTABLISHED
) {
636 return -EISCONN
; /* No reconnect on a seqpacket socket */
639 sk
->sk_state
= TCP_CLOSE
;
640 sock
->state
= SS_UNCONNECTED
;
642 if (addr_len
!= sizeof(struct sockaddr_ax25
) && addr_len
!= sizeof(struct full_sockaddr_ax25
)) {
646 if (addr
->sax25_family
!= AF_NETROM
) {
650 if (sock_flag(sk
, SOCK_ZAPPED
)) { /* Must bind first - autobinding in this may or may not work */
651 sock_reset_flag(sk
, SOCK_ZAPPED
);
653 if ((dev
= nr_dev_first()) == NULL
) {
657 source
= (ax25_address
*)dev
->dev_addr
;
659 user
= ax25_findbyuid(current
->euid
);
661 nr
->user_addr
= user
->call
;
664 if (ax25_uid_policy
&& !capable(CAP_NET_ADMIN
)) {
669 nr
->user_addr
= *source
;
672 nr
->source_addr
= *source
;
676 nr_insert_socket(sk
); /* Finish the bind */
679 nr
->dest_addr
= addr
->sax25_call
;
682 circuit
= nr_find_next_circuit();
685 nr
->my_index
= circuit
/ 256;
686 nr
->my_id
= circuit
% 256;
690 /* Move to connecting socket, start sending Connect Requests */
691 sock
->state
= SS_CONNECTING
;
692 sk
->sk_state
= TCP_SYN_SENT
;
694 nr_establish_data_link(sk
);
696 nr
->state
= NR_STATE_1
;
698 nr_start_heartbeat(sk
);
701 if (sk
->sk_state
!= TCP_ESTABLISHED
&& (flags
& O_NONBLOCK
)) {
707 * A Connect Ack with Choke or timeout or failed routing will go to
710 if (sk
->sk_state
== TCP_SYN_SENT
) {
711 struct task_struct
*tsk
= current
;
712 DECLARE_WAITQUEUE(wait
, tsk
);
714 add_wait_queue(sk
->sk_sleep
, &wait
);
716 set_current_state(TASK_INTERRUPTIBLE
);
717 if (sk
->sk_state
!= TCP_SYN_SENT
)
720 if (!signal_pending(tsk
)) {
725 current
->state
= TASK_RUNNING
;
726 remove_wait_queue(sk
->sk_sleep
, &wait
);
729 current
->state
= TASK_RUNNING
;
730 remove_wait_queue(sk
->sk_sleep
, &wait
);
733 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
734 sock
->state
= SS_UNCONNECTED
;
736 return sock_error(sk
); /* Always set at this point */
739 sock
->state
= SS_CONNECTED
;
745 static int nr_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
747 struct task_struct
*tsk
= current
;
748 DECLARE_WAITQUEUE(wait
, tsk
);
754 if ((sk
= sock
->sk
) == NULL
)
758 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
763 if (sk
->sk_state
!= TCP_LISTEN
) {
769 * The write queue this time is holding sockets ready to use
770 * hooked into the SABM we saved
772 add_wait_queue(sk
->sk_sleep
, &wait
);
774 skb
= skb_dequeue(&sk
->sk_receive_queue
);
778 current
->state
= TASK_INTERRUPTIBLE
;
780 if (flags
& O_NONBLOCK
) {
781 current
->state
= TASK_RUNNING
;
782 remove_wait_queue(sk
->sk_sleep
, &wait
);
785 if (!signal_pending(tsk
)) {
790 current
->state
= TASK_RUNNING
;
791 remove_wait_queue(sk
->sk_sleep
, &wait
);
794 current
->state
= TASK_RUNNING
;
795 remove_wait_queue(sk
->sk_sleep
, &wait
);
798 newsk
->sk_socket
= newsock
;
799 newsk
->sk_sleep
= &newsock
->wait
;
801 /* Now attach up the new socket */
803 sk_acceptq_removed(sk
);
811 static int nr_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
812 int *uaddr_len
, int peer
)
814 struct full_sockaddr_ax25
*sax
= (struct full_sockaddr_ax25
*)uaddr
;
815 struct sock
*sk
= sock
->sk
;
816 struct nr_sock
*nr
= nr_sk(sk
);
820 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
824 sax
->fsa_ax25
.sax25_family
= AF_NETROM
;
825 sax
->fsa_ax25
.sax25_ndigis
= 1;
826 sax
->fsa_ax25
.sax25_call
= nr
->user_addr
;
827 sax
->fsa_digipeater
[0] = nr
->dest_addr
;
828 *uaddr_len
= sizeof(struct full_sockaddr_ax25
);
830 sax
->fsa_ax25
.sax25_family
= AF_NETROM
;
831 sax
->fsa_ax25
.sax25_ndigis
= 0;
832 sax
->fsa_ax25
.sax25_call
= nr
->source_addr
;
833 *uaddr_len
= sizeof(struct sockaddr_ax25
);
840 int nr_rx_frame(struct sk_buff
*skb
, struct net_device
*dev
)
844 struct nr_sock
*nr_make
;
845 ax25_address
*src
, *dest
, *user
;
846 unsigned short circuit_index
, circuit_id
;
847 unsigned short peer_circuit_index
, peer_circuit_id
;
848 unsigned short frametype
, flags
, window
, timeout
;
851 skb
->sk
= NULL
; /* Initially we don't know who it's for */
854 * skb->data points to the netrom frame start
857 src
= (ax25_address
*)(skb
->data
+ 0);
858 dest
= (ax25_address
*)(skb
->data
+ 7);
860 circuit_index
= skb
->data
[15];
861 circuit_id
= skb
->data
[16];
862 peer_circuit_index
= skb
->data
[17];
863 peer_circuit_id
= skb
->data
[18];
864 frametype
= skb
->data
[19] & 0x0F;
865 flags
= skb
->data
[19] & 0xF0;
868 * Check for an incoming IP over NET/ROM frame.
870 if (frametype
== NR_PROTOEXT
&&
871 circuit_index
== NR_PROTO_IP
&& circuit_id
== NR_PROTO_IP
) {
872 skb_pull(skb
, NR_NETWORK_LEN
+ NR_TRANSPORT_LEN
);
873 skb
->h
.raw
= skb
->data
;
875 return nr_rx_ip(skb
, dev
);
879 * Find an existing socket connection, based on circuit ID, if it's
880 * a Connect Request base it on their circuit ID.
882 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
883 * circuit that no longer exists at the other end ...
888 if (circuit_index
== 0 && circuit_id
== 0) {
889 if (frametype
== NR_CONNACK
&& flags
== NR_CHOKE_FLAG
)
890 sk
= nr_find_peer(peer_circuit_index
, peer_circuit_id
, src
);
892 if (frametype
== NR_CONNREQ
)
893 sk
= nr_find_peer(circuit_index
, circuit_id
, src
);
895 sk
= nr_find_socket(circuit_index
, circuit_id
);
899 skb
->h
.raw
= skb
->data
;
901 if (frametype
== NR_CONNACK
&& skb
->len
== 22)
902 nr_sk(sk
)->bpqext
= 1;
904 nr_sk(sk
)->bpqext
= 0;
906 ret
= nr_process_rx_frame(sk
, skb
);
912 * Now it should be a CONNREQ.
914 if (frametype
!= NR_CONNREQ
) {
916 * Here it would be nice to be able to send a reset but
917 * NET/ROM doesn't have one. We've tried to extend the protocol
918 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
919 * apparently kills BPQ boxes... :-(
920 * So now we try to follow the established behaviour of
921 * G8PZT's Xrouter which is sending packets with command type 7
922 * as an extension of the protocol.
924 if (sysctl_netrom_reset_circuit
&&
925 (frametype
!= NR_RESET
|| flags
!= 0))
926 nr_transmit_reset(skb
, 1);
931 sk
= nr_find_listener(dest
);
933 user
= (ax25_address
*)(skb
->data
+ 21);
935 if (sk
== NULL
|| sk_acceptq_is_full(sk
) ||
936 (make
= nr_make_new(sk
)) == NULL
) {
937 nr_transmit_refusal(skb
, 0);
943 window
= skb
->data
[20];
946 make
->sk_state
= TCP_ESTABLISHED
;
948 /* Fill in his circuit details */
949 nr_make
= nr_sk(make
);
950 nr_make
->source_addr
= *dest
;
951 nr_make
->dest_addr
= *src
;
952 nr_make
->user_addr
= *user
;
954 nr_make
->your_index
= circuit_index
;
955 nr_make
->your_id
= circuit_id
;
958 circuit
= nr_find_next_circuit();
961 nr_make
->my_index
= circuit
/ 256;
962 nr_make
->my_id
= circuit
% 256;
966 /* Window negotiation */
967 if (window
< nr_make
->window
)
968 nr_make
->window
= window
;
970 /* L4 timeout negotiation */
971 if (skb
->len
== 37) {
972 timeout
= skb
->data
[36] * 256 + skb
->data
[35];
973 if (timeout
* HZ
< nr_make
->t1
)
974 nr_make
->t1
= timeout
* HZ
;
980 nr_write_internal(make
, NR_CONNACK
);
982 nr_make
->condition
= 0x00;
987 nr_make
->state
= NR_STATE_3
;
988 sk_acceptq_added(sk
);
990 nr_insert_socket(make
);
992 skb_queue_head(&sk
->sk_receive_queue
, skb
);
994 nr_start_heartbeat(make
);
995 nr_start_idletimer(make
);
997 if (!sock_flag(sk
, SOCK_DEAD
))
998 sk
->sk_data_ready(sk
, skb
->len
);
1004 static int nr_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
1005 struct msghdr
*msg
, size_t len
)
1007 struct sock
*sk
= sock
->sk
;
1008 struct nr_sock
*nr
= nr_sk(sk
);
1009 struct sockaddr_ax25
*usax
= (struct sockaddr_ax25
*)msg
->msg_name
;
1011 struct sockaddr_ax25 sax
;
1012 struct sk_buff
*skb
;
1013 unsigned char *asmptr
;
1016 if (msg
->msg_flags
& ~(MSG_DONTWAIT
|MSG_EOR
|MSG_CMSG_COMPAT
))
1020 if (sock_flag(sk
, SOCK_ZAPPED
)) {
1021 err
= -EADDRNOTAVAIL
;
1025 if (sk
->sk_shutdown
& SEND_SHUTDOWN
) {
1026 send_sig(SIGPIPE
, current
, 0);
1031 if (nr
->device
== NULL
) {
1037 if (msg
->msg_namelen
< sizeof(sax
)) {
1042 if (ax25cmp(&nr
->dest_addr
, &sax
.sax25_call
) != 0) {
1046 if (sax
.sax25_family
!= AF_NETROM
) {
1051 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1055 sax
.sax25_family
= AF_NETROM
;
1056 sax
.sax25_call
= nr
->dest_addr
;
1059 SOCK_DEBUG(sk
, "NET/ROM: sendto: Addresses built.\n");
1061 /* Build a packet */
1062 SOCK_DEBUG(sk
, "NET/ROM: sendto: building packet.\n");
1063 size
= len
+ NR_NETWORK_LEN
+ NR_TRANSPORT_LEN
;
1065 if ((skb
= sock_alloc_send_skb(sk
, size
, msg
->msg_flags
& MSG_DONTWAIT
, &err
)) == NULL
)
1068 skb_reserve(skb
, size
- len
);
1071 * Push down the NET/ROM header
1074 asmptr
= skb_push(skb
, NR_TRANSPORT_LEN
);
1075 SOCK_DEBUG(sk
, "Building NET/ROM Header.\n");
1077 /* Build a NET/ROM Transport header */
1079 *asmptr
++ = nr
->your_index
;
1080 *asmptr
++ = nr
->your_id
;
1081 *asmptr
++ = 0; /* To be filled in later */
1082 *asmptr
++ = 0; /* Ditto */
1083 *asmptr
++ = NR_INFO
;
1084 SOCK_DEBUG(sk
, "Built header.\n");
1087 * Put the data on the end
1090 skb
->h
.raw
= skb_put(skb
, len
);
1092 asmptr
= skb
->h
.raw
;
1093 SOCK_DEBUG(sk
, "NET/ROM: Appending user data\n");
1095 /* User data follows immediately after the NET/ROM transport header */
1096 if (memcpy_fromiovec(asmptr
, msg
->msg_iov
, len
)) {
1102 SOCK_DEBUG(sk
, "NET/ROM: Transmitting buffer\n");
1104 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1110 nr_output(sk
, skb
); /* Shove it onto the queue */
1118 static int nr_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
1119 struct msghdr
*msg
, size_t size
, int flags
)
1121 struct sock
*sk
= sock
->sk
;
1122 struct sockaddr_ax25
*sax
= (struct sockaddr_ax25
*)msg
->msg_name
;
1124 struct sk_buff
*skb
;
1128 * This works for seqpacket too. The receiver has ordered the queue for
1129 * us! We do one quick check first though
1133 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1138 /* Now we can treat all alike */
1139 if ((skb
= skb_recv_datagram(sk
, flags
& ~MSG_DONTWAIT
, flags
& MSG_DONTWAIT
, &er
)) == NULL
) {
1144 skb
->h
.raw
= skb
->data
;
1147 if (copied
> size
) {
1149 msg
->msg_flags
|= MSG_TRUNC
;
1152 skb_copy_datagram_iovec(skb
, 0, msg
->msg_iov
, copied
);
1155 sax
->sax25_family
= AF_NETROM
;
1156 memcpy(sax
->sax25_call
.ax25_call
, skb
->data
+ 7, AX25_ADDR_LEN
);
1159 msg
->msg_namelen
= sizeof(*sax
);
1161 skb_free_datagram(sk
, skb
);
1168 static int nr_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
1170 struct sock
*sk
= sock
->sk
;
1171 void __user
*argp
= (void __user
*)arg
;
1179 amount
= sk
->sk_sndbuf
- atomic_read(&sk
->sk_wmem_alloc
);
1183 return put_user(amount
, (int __user
*)argp
);
1187 struct sk_buff
*skb
;
1191 /* These two are safe on a single CPU system as only user tasks fiddle here */
1192 if ((skb
= skb_peek(&sk
->sk_receive_queue
)) != NULL
)
1195 return put_user(amount
, (int __user
*)argp
);
1200 ret
= sock_get_timestamp(sk
, argp
);
1206 case SIOCGIFDSTADDR
:
1207 case SIOCSIFDSTADDR
:
1208 case SIOCGIFBRDADDR
:
1209 case SIOCSIFBRDADDR
:
1210 case SIOCGIFNETMASK
:
1211 case SIOCSIFNETMASK
:
1219 if (!capable(CAP_NET_ADMIN
)) return -EPERM
;
1220 return nr_rt_ioctl(cmd
, argp
);
1223 return -ENOIOCTLCMD
;
1229 #ifdef CONFIG_PROC_FS
1231 static void *nr_info_start(struct seq_file
*seq
, loff_t
*pos
)
1234 struct hlist_node
*node
;
1237 spin_lock_bh(&nr_list_lock
);
1239 return SEQ_START_TOKEN
;
1241 sk_for_each(s
, node
, &nr_list
) {
1249 static void *nr_info_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1253 return (v
== SEQ_START_TOKEN
) ? sk_head(&nr_list
)
1254 : sk_next((struct sock
*)v
);
1257 static void nr_info_stop(struct seq_file
*seq
, void *v
)
1259 spin_unlock_bh(&nr_list_lock
);
1262 static int nr_info_show(struct seq_file
*seq
, void *v
)
1265 struct net_device
*dev
;
1267 const char *devname
;
1270 if (v
== SEQ_START_TOKEN
)
1272 "user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n");
1279 if ((dev
= nr
->device
) == NULL
)
1282 devname
= dev
->name
;
1284 seq_printf(seq
, "%-9s ", ax2asc(buf
, &nr
->user_addr
));
1285 seq_printf(seq
, "%-9s ", ax2asc(buf
, &nr
->dest_addr
));
1287 "%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n",
1288 ax2asc(buf
, &nr
->source_addr
),
1298 ax25_display_timer(&nr
->t1timer
) / HZ
,
1300 ax25_display_timer(&nr
->t2timer
) / HZ
,
1302 ax25_display_timer(&nr
->t4timer
) / HZ
,
1304 ax25_display_timer(&nr
->idletimer
) / (60 * HZ
),
1305 nr
->idle
/ (60 * HZ
),
1309 atomic_read(&s
->sk_wmem_alloc
),
1310 atomic_read(&s
->sk_rmem_alloc
),
1311 s
->sk_socket
? SOCK_INODE(s
->sk_socket
)->i_ino
: 0L);
1318 static struct seq_operations nr_info_seqops
= {
1319 .start
= nr_info_start
,
1320 .next
= nr_info_next
,
1321 .stop
= nr_info_stop
,
1322 .show
= nr_info_show
,
1325 static int nr_info_open(struct inode
*inode
, struct file
*file
)
1327 return seq_open(file
, &nr_info_seqops
);
1330 static struct file_operations nr_info_fops
= {
1331 .owner
= THIS_MODULE
,
1332 .open
= nr_info_open
,
1334 .llseek
= seq_lseek
,
1335 .release
= seq_release
,
1337 #endif /* CONFIG_PROC_FS */
1339 static struct net_proto_family nr_family_ops
= {
1340 .family
= PF_NETROM
,
1341 .create
= nr_create
,
1342 .owner
= THIS_MODULE
,
1345 static const struct proto_ops nr_proto_ops
= {
1346 .family
= PF_NETROM
,
1347 .owner
= THIS_MODULE
,
1348 .release
= nr_release
,
1350 .connect
= nr_connect
,
1351 .socketpair
= sock_no_socketpair
,
1352 .accept
= nr_accept
,
1353 .getname
= nr_getname
,
1354 .poll
= datagram_poll
,
1356 .listen
= nr_listen
,
1357 .shutdown
= sock_no_shutdown
,
1358 .setsockopt
= nr_setsockopt
,
1359 .getsockopt
= nr_getsockopt
,
1360 .sendmsg
= nr_sendmsg
,
1361 .recvmsg
= nr_recvmsg
,
1362 .mmap
= sock_no_mmap
,
1363 .sendpage
= sock_no_sendpage
,
1366 static struct notifier_block nr_dev_notifier
= {
1367 .notifier_call
= nr_device_event
,
1370 static struct net_device
**dev_nr
;
1372 static int __init
nr_proto_init(void)
1375 int rc
= proto_register(&nr_proto
, 0);
1380 if (nr_ndevs
> 0x7fffffff/sizeof(struct net_device
*)) {
1381 printk(KERN_ERR
"NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1385 dev_nr
= kzalloc(nr_ndevs
* sizeof(struct net_device
*), GFP_KERNEL
);
1386 if (dev_nr
== NULL
) {
1387 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to allocate device array\n");
1391 for (i
= 0; i
< nr_ndevs
; i
++) {
1392 char name
[IFNAMSIZ
];
1393 struct net_device
*dev
;
1395 sprintf(name
, "nr%d", i
);
1396 dev
= alloc_netdev(sizeof(struct nr_private
), name
, nr_setup
);
1398 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to allocate device structure\n");
1403 if (register_netdev(dev
)) {
1404 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to register network device\n");
1411 if (sock_register(&nr_family_ops
)) {
1412 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to register socket family\n");
1416 register_netdevice_notifier(&nr_dev_notifier
);
1418 ax25_protocol_register(AX25_P_NETROM
, nr_route_frame
);
1419 ax25_linkfail_register(nr_link_failed
);
1421 #ifdef CONFIG_SYSCTL
1422 nr_register_sysctl();
1427 proc_net_fops_create("nr", S_IRUGO
, &nr_info_fops
);
1428 proc_net_fops_create("nr_neigh", S_IRUGO
, &nr_neigh_fops
);
1429 proc_net_fops_create("nr_nodes", S_IRUGO
, &nr_nodes_fops
);
1434 unregister_netdev(dev_nr
[i
]);
1435 free_netdev(dev_nr
[i
]);
1438 proto_unregister(&nr_proto
);
1443 module_init(nr_proto_init
);
1445 module_param(nr_ndevs
, int, 0);
1446 MODULE_PARM_DESC(nr_ndevs
, "number of NET/ROM devices");
1448 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1449 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1450 MODULE_LICENSE("GPL");
1451 MODULE_ALIAS_NETPROTO(PF_NETROM
);
1453 static void __exit
nr_exit(void)
1457 proc_net_remove("nr");
1458 proc_net_remove("nr_neigh");
1459 proc_net_remove("nr_nodes");
1460 nr_loopback_clear();
1464 #ifdef CONFIG_SYSCTL
1465 nr_unregister_sysctl();
1468 ax25_linkfail_release(nr_link_failed
);
1469 ax25_protocol_release(AX25_P_NETROM
);
1471 unregister_netdevice_notifier(&nr_dev_notifier
);
1473 sock_unregister(PF_NETROM
);
1475 for (i
= 0; i
< nr_ndevs
; i
++) {
1476 struct net_device
*dev
= dev_nr
[i
];
1478 unregister_netdev(dev
);
1484 proto_unregister(&nr_proto
);
1486 module_exit(nr_exit
);