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/config.h>
12 #include <linux/module.h>
13 #include <linux/moduleparam.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 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
);
427 nr
->t1
= sysctl_netrom_transport_timeout
;
428 nr
->t2
= sysctl_netrom_transport_acknowledge_delay
;
429 nr
->n2
= sysctl_netrom_transport_maximum_tries
;
430 nr
->t4
= sysctl_netrom_transport_busy_delay
;
431 nr
->idle
= sysctl_netrom_transport_no_activity_timeout
;
432 nr
->window
= sysctl_netrom_transport_requested_window_size
;
435 nr
->state
= NR_STATE_0
;
440 static struct sock
*nr_make_new(struct sock
*osk
)
443 struct nr_sock
*nr
, *onr
;
445 if (osk
->sk_type
!= SOCK_SEQPACKET
)
448 if ((sk
= sk_alloc(PF_NETROM
, GFP_ATOMIC
, osk
->sk_prot
, 1)) == NULL
)
453 sock_init_data(NULL
, sk
);
455 sk
->sk_type
= osk
->sk_type
;
456 sk
->sk_socket
= osk
->sk_socket
;
457 sk
->sk_priority
= osk
->sk_priority
;
458 sk
->sk_protocol
= osk
->sk_protocol
;
459 sk
->sk_rcvbuf
= osk
->sk_rcvbuf
;
460 sk
->sk_sndbuf
= osk
->sk_sndbuf
;
461 sk
->sk_state
= TCP_ESTABLISHED
;
462 sk
->sk_sleep
= osk
->sk_sleep
;
463 sock_copy_flags(sk
, osk
);
465 skb_queue_head_init(&nr
->ack_queue
);
466 skb_queue_head_init(&nr
->reseq_queue
);
467 skb_queue_head_init(&nr
->frag_queue
);
477 nr
->idle
= onr
->idle
;
478 nr
->window
= onr
->window
;
480 nr
->device
= onr
->device
;
481 nr
->bpqext
= onr
->bpqext
;
486 static int nr_release(struct socket
*sock
)
488 struct sock
*sk
= sock
->sk
;
491 if (sk
== NULL
) return 0;
501 nr_disconnect(sk
, 0);
502 nr_destroy_socket(sk
);
508 nr_write_internal(sk
, NR_DISCREQ
);
509 nr_start_t1timer(sk
);
512 nr_stop_idletimer(sk
);
513 nr
->state
= NR_STATE_2
;
514 sk
->sk_state
= TCP_CLOSE
;
515 sk
->sk_shutdown
|= SEND_SHUTDOWN
;
516 sk
->sk_state_change(sk
);
518 sock_set_flag(sk
, SOCK_DESTROY
);
519 sk
->sk_socket
= NULL
;
523 sk
->sk_socket
= NULL
;
534 static int nr_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
536 struct sock
*sk
= sock
->sk
;
537 struct nr_sock
*nr
= nr_sk(sk
);
538 struct full_sockaddr_ax25
*addr
= (struct full_sockaddr_ax25
*)uaddr
;
539 struct net_device
*dev
;
540 ax25_uid_assoc
*user
;
541 ax25_address
*source
;
544 if (!sock_flag(sk
, SOCK_ZAPPED
)) {
548 if (addr_len
< sizeof(struct sockaddr_ax25
) || addr_len
> sizeof(struct full_sockaddr_ax25
)) {
552 if (addr_len
< (addr
->fsa_ax25
.sax25_ndigis
* sizeof(ax25_address
) + sizeof(struct sockaddr_ax25
))) {
556 if (addr
->fsa_ax25
.sax25_family
!= AF_NETROM
) {
560 if ((dev
= nr_dev_get(&addr
->fsa_ax25
.sax25_call
)) == NULL
) {
561 SOCK_DEBUG(sk
, "NET/ROM: bind failed: invalid node callsign\n");
563 return -EADDRNOTAVAIL
;
567 * Only the super user can set an arbitrary user callsign.
569 if (addr
->fsa_ax25
.sax25_ndigis
== 1) {
570 if (!capable(CAP_NET_BIND_SERVICE
)) {
575 nr
->user_addr
= addr
->fsa_digipeater
[0];
576 nr
->source_addr
= addr
->fsa_ax25
.sax25_call
;
578 source
= &addr
->fsa_ax25
.sax25_call
;
580 user
= ax25_findbyuid(current
->euid
);
582 nr
->user_addr
= user
->call
;
585 if (ax25_uid_policy
&& !capable(CAP_NET_BIND_SERVICE
)) {
590 nr
->user_addr
= *source
;
593 nr
->source_addr
= *source
;
597 nr_insert_socket(sk
);
599 sock_reset_flag(sk
, SOCK_ZAPPED
);
602 SOCK_DEBUG(sk
, "NET/ROM: socket is bound\n");
606 static int nr_connect(struct socket
*sock
, struct sockaddr
*uaddr
,
607 int addr_len
, int flags
)
609 struct sock
*sk
= sock
->sk
;
610 struct nr_sock
*nr
= nr_sk(sk
);
611 struct sockaddr_ax25
*addr
= (struct sockaddr_ax25
*)uaddr
;
612 ax25_address
*source
= NULL
;
613 ax25_uid_assoc
*user
;
614 struct net_device
*dev
;
617 if (sk
->sk_state
== TCP_ESTABLISHED
&& sock
->state
== SS_CONNECTING
) {
618 sock
->state
= SS_CONNECTED
;
620 return 0; /* Connect completed during a ERESTARTSYS event */
623 if (sk
->sk_state
== TCP_CLOSE
&& sock
->state
== SS_CONNECTING
) {
624 sock
->state
= SS_UNCONNECTED
;
626 return -ECONNREFUSED
;
629 if (sk
->sk_state
== TCP_ESTABLISHED
) {
631 return -EISCONN
; /* No reconnect on a seqpacket socket */
634 sk
->sk_state
= TCP_CLOSE
;
635 sock
->state
= SS_UNCONNECTED
;
637 if (addr_len
!= sizeof(struct sockaddr_ax25
) && addr_len
!= sizeof(struct full_sockaddr_ax25
)) {
641 if (addr
->sax25_family
!= AF_NETROM
) {
645 if (sock_flag(sk
, SOCK_ZAPPED
)) { /* Must bind first - autobinding in this may or may not work */
646 sock_reset_flag(sk
, SOCK_ZAPPED
);
648 if ((dev
= nr_dev_first()) == NULL
) {
652 source
= (ax25_address
*)dev
->dev_addr
;
654 user
= ax25_findbyuid(current
->euid
);
656 nr
->user_addr
= user
->call
;
659 if (ax25_uid_policy
&& !capable(CAP_NET_ADMIN
)) {
664 nr
->user_addr
= *source
;
667 nr
->source_addr
= *source
;
671 nr_insert_socket(sk
); /* Finish the bind */
674 nr
->dest_addr
= addr
->sax25_call
;
677 circuit
= nr_find_next_circuit();
680 nr
->my_index
= circuit
/ 256;
681 nr
->my_id
= circuit
% 256;
685 /* Move to connecting socket, start sending Connect Requests */
686 sock
->state
= SS_CONNECTING
;
687 sk
->sk_state
= TCP_SYN_SENT
;
689 nr_establish_data_link(sk
);
691 nr
->state
= NR_STATE_1
;
693 nr_start_heartbeat(sk
);
696 if (sk
->sk_state
!= TCP_ESTABLISHED
&& (flags
& O_NONBLOCK
)) {
702 * A Connect Ack with Choke or timeout or failed routing will go to
705 if (sk
->sk_state
== TCP_SYN_SENT
) {
706 struct task_struct
*tsk
= current
;
707 DECLARE_WAITQUEUE(wait
, tsk
);
709 add_wait_queue(sk
->sk_sleep
, &wait
);
711 set_current_state(TASK_INTERRUPTIBLE
);
712 if (sk
->sk_state
!= TCP_SYN_SENT
)
715 if (!signal_pending(tsk
)) {
720 current
->state
= TASK_RUNNING
;
721 remove_wait_queue(sk
->sk_sleep
, &wait
);
724 current
->state
= TASK_RUNNING
;
725 remove_wait_queue(sk
->sk_sleep
, &wait
);
728 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
729 sock
->state
= SS_UNCONNECTED
;
731 return sock_error(sk
); /* Always set at this point */
734 sock
->state
= SS_CONNECTED
;
740 static int nr_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
742 struct task_struct
*tsk
= current
;
743 DECLARE_WAITQUEUE(wait
, tsk
);
749 if ((sk
= sock
->sk
) == NULL
)
753 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
758 if (sk
->sk_state
!= TCP_LISTEN
) {
764 * The write queue this time is holding sockets ready to use
765 * hooked into the SABM we saved
767 add_wait_queue(sk
->sk_sleep
, &wait
);
769 skb
= skb_dequeue(&sk
->sk_receive_queue
);
773 current
->state
= TASK_INTERRUPTIBLE
;
775 if (flags
& O_NONBLOCK
) {
776 current
->state
= TASK_RUNNING
;
777 remove_wait_queue(sk
->sk_sleep
, &wait
);
780 if (!signal_pending(tsk
)) {
785 current
->state
= TASK_RUNNING
;
786 remove_wait_queue(sk
->sk_sleep
, &wait
);
789 current
->state
= TASK_RUNNING
;
790 remove_wait_queue(sk
->sk_sleep
, &wait
);
793 newsk
->sk_socket
= newsock
;
794 newsk
->sk_sleep
= &newsock
->wait
;
796 /* Now attach up the new socket */
798 sk
->sk_ack_backlog
--;
806 static int nr_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
807 int *uaddr_len
, int peer
)
809 struct full_sockaddr_ax25
*sax
= (struct full_sockaddr_ax25
*)uaddr
;
810 struct sock
*sk
= sock
->sk
;
811 struct nr_sock
*nr
= nr_sk(sk
);
815 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
819 sax
->fsa_ax25
.sax25_family
= AF_NETROM
;
820 sax
->fsa_ax25
.sax25_ndigis
= 1;
821 sax
->fsa_ax25
.sax25_call
= nr
->user_addr
;
822 sax
->fsa_digipeater
[0] = nr
->dest_addr
;
823 *uaddr_len
= sizeof(struct full_sockaddr_ax25
);
825 sax
->fsa_ax25
.sax25_family
= AF_NETROM
;
826 sax
->fsa_ax25
.sax25_ndigis
= 0;
827 sax
->fsa_ax25
.sax25_call
= nr
->source_addr
;
828 *uaddr_len
= sizeof(struct sockaddr_ax25
);
835 int nr_rx_frame(struct sk_buff
*skb
, struct net_device
*dev
)
839 struct nr_sock
*nr_make
;
840 ax25_address
*src
, *dest
, *user
;
841 unsigned short circuit_index
, circuit_id
;
842 unsigned short peer_circuit_index
, peer_circuit_id
;
843 unsigned short frametype
, flags
, window
, timeout
;
846 skb
->sk
= NULL
; /* Initially we don't know who it's for */
849 * skb->data points to the netrom frame start
852 src
= (ax25_address
*)(skb
->data
+ 0);
853 dest
= (ax25_address
*)(skb
->data
+ 7);
855 circuit_index
= skb
->data
[15];
856 circuit_id
= skb
->data
[16];
857 peer_circuit_index
= skb
->data
[17];
858 peer_circuit_id
= skb
->data
[18];
859 frametype
= skb
->data
[19] & 0x0F;
860 flags
= skb
->data
[19] & 0xF0;
863 * Check for an incoming IP over NET/ROM frame.
865 if (frametype
== NR_PROTOEXT
&&
866 circuit_index
== NR_PROTO_IP
&& circuit_id
== NR_PROTO_IP
) {
867 skb_pull(skb
, NR_NETWORK_LEN
+ NR_TRANSPORT_LEN
);
868 skb
->h
.raw
= skb
->data
;
870 return nr_rx_ip(skb
, dev
);
874 * Find an existing socket connection, based on circuit ID, if it's
875 * a Connect Request base it on their circuit ID.
877 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
878 * circuit that no longer exists at the other end ...
883 if (circuit_index
== 0 && circuit_id
== 0) {
884 if (frametype
== NR_CONNACK
&& flags
== NR_CHOKE_FLAG
)
885 sk
= nr_find_peer(peer_circuit_index
, peer_circuit_id
, src
);
887 if (frametype
== NR_CONNREQ
)
888 sk
= nr_find_peer(circuit_index
, circuit_id
, src
);
890 sk
= nr_find_socket(circuit_index
, circuit_id
);
894 skb
->h
.raw
= skb
->data
;
896 if (frametype
== NR_CONNACK
&& skb
->len
== 22)
897 nr_sk(sk
)->bpqext
= 1;
899 nr_sk(sk
)->bpqext
= 0;
901 ret
= nr_process_rx_frame(sk
, skb
);
907 * Now it should be a CONNREQ.
909 if (frametype
!= NR_CONNREQ
) {
911 * Here it would be nice to be able to send a reset but
912 * NET/ROM doesn't have one. We've tried to extend the protocol
913 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
914 * apparently kills BPQ boxes... :-(
915 * So now we try to follow the established behaviour of
916 * G8PZT's Xrouter which is sending packets with command type 7
917 * as an extension of the protocol.
919 if (sysctl_netrom_reset_circuit
&&
920 (frametype
!= NR_RESET
|| flags
!= 0))
921 nr_transmit_reset(skb
, 1);
926 sk
= nr_find_listener(dest
);
928 user
= (ax25_address
*)(skb
->data
+ 21);
930 if (sk
== NULL
|| sk_acceptq_is_full(sk
) ||
931 (make
= nr_make_new(sk
)) == NULL
) {
932 nr_transmit_refusal(skb
, 0);
938 window
= skb
->data
[20];
941 make
->sk_state
= TCP_ESTABLISHED
;
943 /* Fill in his circuit details */
944 nr_make
= nr_sk(make
);
945 nr_make
->source_addr
= *dest
;
946 nr_make
->dest_addr
= *src
;
947 nr_make
->user_addr
= *user
;
949 nr_make
->your_index
= circuit_index
;
950 nr_make
->your_id
= circuit_id
;
953 circuit
= nr_find_next_circuit();
956 nr_make
->my_index
= circuit
/ 256;
957 nr_make
->my_id
= circuit
% 256;
961 /* Window negotiation */
962 if (window
< nr_make
->window
)
963 nr_make
->window
= window
;
965 /* L4 timeout negotiation */
966 if (skb
->len
== 37) {
967 timeout
= skb
->data
[36] * 256 + skb
->data
[35];
968 if (timeout
* HZ
< nr_make
->t1
)
969 nr_make
->t1
= timeout
* HZ
;
975 nr_write_internal(make
, NR_CONNACK
);
977 nr_make
->condition
= 0x00;
982 nr_make
->state
= NR_STATE_3
;
983 sk
->sk_ack_backlog
++;
985 nr_insert_socket(make
);
987 skb_queue_head(&sk
->sk_receive_queue
, skb
);
989 nr_start_heartbeat(make
);
990 nr_start_idletimer(make
);
992 if (!sock_flag(sk
, SOCK_DEAD
))
993 sk
->sk_data_ready(sk
, skb
->len
);
999 static int nr_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
1000 struct msghdr
*msg
, size_t len
)
1002 struct sock
*sk
= sock
->sk
;
1003 struct nr_sock
*nr
= nr_sk(sk
);
1004 struct sockaddr_ax25
*usax
= (struct sockaddr_ax25
*)msg
->msg_name
;
1006 struct sockaddr_ax25 sax
;
1007 struct sk_buff
*skb
;
1008 unsigned char *asmptr
;
1011 if (msg
->msg_flags
& ~(MSG_DONTWAIT
|MSG_EOR
|MSG_CMSG_COMPAT
))
1015 if (sock_flag(sk
, SOCK_ZAPPED
)) {
1016 err
= -EADDRNOTAVAIL
;
1020 if (sk
->sk_shutdown
& SEND_SHUTDOWN
) {
1021 send_sig(SIGPIPE
, current
, 0);
1026 if (nr
->device
== NULL
) {
1032 if (msg
->msg_namelen
< sizeof(sax
)) {
1037 if (ax25cmp(&nr
->dest_addr
, &sax
.sax25_call
) != 0) {
1041 if (sax
.sax25_family
!= AF_NETROM
) {
1046 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1050 sax
.sax25_family
= AF_NETROM
;
1051 sax
.sax25_call
= nr
->dest_addr
;
1054 SOCK_DEBUG(sk
, "NET/ROM: sendto: Addresses built.\n");
1056 /* Build a packet */
1057 SOCK_DEBUG(sk
, "NET/ROM: sendto: building packet.\n");
1058 size
= len
+ NR_NETWORK_LEN
+ NR_TRANSPORT_LEN
;
1060 if ((skb
= sock_alloc_send_skb(sk
, size
, msg
->msg_flags
& MSG_DONTWAIT
, &err
)) == NULL
)
1063 skb_reserve(skb
, size
- len
);
1066 * Push down the NET/ROM header
1069 asmptr
= skb_push(skb
, NR_TRANSPORT_LEN
);
1070 SOCK_DEBUG(sk
, "Building NET/ROM Header.\n");
1072 /* Build a NET/ROM Transport header */
1074 *asmptr
++ = nr
->your_index
;
1075 *asmptr
++ = nr
->your_id
;
1076 *asmptr
++ = 0; /* To be filled in later */
1077 *asmptr
++ = 0; /* Ditto */
1078 *asmptr
++ = NR_INFO
;
1079 SOCK_DEBUG(sk
, "Built header.\n");
1082 * Put the data on the end
1085 skb
->h
.raw
= skb_put(skb
, len
);
1087 asmptr
= skb
->h
.raw
;
1088 SOCK_DEBUG(sk
, "NET/ROM: Appending user data\n");
1090 /* User data follows immediately after the NET/ROM transport header */
1091 if (memcpy_fromiovec(asmptr
, msg
->msg_iov
, len
)) {
1097 SOCK_DEBUG(sk
, "NET/ROM: Transmitting buffer\n");
1099 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1105 nr_output(sk
, skb
); /* Shove it onto the queue */
1113 static int nr_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
1114 struct msghdr
*msg
, size_t size
, int flags
)
1116 struct sock
*sk
= sock
->sk
;
1117 struct sockaddr_ax25
*sax
= (struct sockaddr_ax25
*)msg
->msg_name
;
1119 struct sk_buff
*skb
;
1123 * This works for seqpacket too. The receiver has ordered the queue for
1124 * us! We do one quick check first though
1128 if (sk
->sk_state
!= TCP_ESTABLISHED
) {
1133 /* Now we can treat all alike */
1134 if ((skb
= skb_recv_datagram(sk
, flags
& ~MSG_DONTWAIT
, flags
& MSG_DONTWAIT
, &er
)) == NULL
) {
1139 skb
->h
.raw
= skb
->data
;
1142 if (copied
> size
) {
1144 msg
->msg_flags
|= MSG_TRUNC
;
1147 skb_copy_datagram_iovec(skb
, 0, msg
->msg_iov
, copied
);
1150 sax
->sax25_family
= AF_NETROM
;
1151 memcpy(sax
->sax25_call
.ax25_call
, skb
->data
+ 7, AX25_ADDR_LEN
);
1154 msg
->msg_namelen
= sizeof(*sax
);
1156 skb_free_datagram(sk
, skb
);
1163 static int nr_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
1165 struct sock
*sk
= sock
->sk
;
1166 void __user
*argp
= (void __user
*)arg
;
1173 amount
= sk
->sk_sndbuf
- atomic_read(&sk
->sk_wmem_alloc
);
1177 return put_user(amount
, (int __user
*)argp
);
1181 struct sk_buff
*skb
;
1183 /* These two are safe on a single CPU system as only user tasks fiddle here */
1184 if ((skb
= skb_peek(&sk
->sk_receive_queue
)) != NULL
)
1187 return put_user(amount
, (int __user
*)argp
);
1191 ret
= sock_get_timestamp(sk
, argp
);
1197 case SIOCGIFDSTADDR
:
1198 case SIOCSIFDSTADDR
:
1199 case SIOCGIFBRDADDR
:
1200 case SIOCSIFBRDADDR
:
1201 case SIOCGIFNETMASK
:
1202 case SIOCSIFNETMASK
:
1212 if (!capable(CAP_NET_ADMIN
)) return -EPERM
;
1213 return nr_rt_ioctl(cmd
, argp
);
1217 return dev_ioctl(cmd
, argp
);
1224 #ifdef CONFIG_PROC_FS
1226 static void *nr_info_start(struct seq_file
*seq
, loff_t
*pos
)
1229 struct hlist_node
*node
;
1232 spin_lock_bh(&nr_list_lock
);
1234 return SEQ_START_TOKEN
;
1236 sk_for_each(s
, node
, &nr_list
) {
1244 static void *nr_info_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1248 return (v
== SEQ_START_TOKEN
) ? sk_head(&nr_list
)
1249 : sk_next((struct sock
*)v
);
1252 static void nr_info_stop(struct seq_file
*seq
, void *v
)
1254 spin_unlock_bh(&nr_list_lock
);
1257 static int nr_info_show(struct seq_file
*seq
, void *v
)
1260 struct net_device
*dev
;
1262 const char *devname
;
1265 if (v
== SEQ_START_TOKEN
)
1267 "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");
1274 if ((dev
= nr
->device
) == NULL
)
1277 devname
= dev
->name
;
1279 seq_printf(seq
, "%-9s ", ax2asc(buf
, &nr
->user_addr
));
1280 seq_printf(seq
, "%-9s ", ax2asc(buf
, &nr
->dest_addr
));
1282 "%-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",
1283 ax2asc(buf
, &nr
->source_addr
),
1293 ax25_display_timer(&nr
->t1timer
) / HZ
,
1295 ax25_display_timer(&nr
->t2timer
) / HZ
,
1297 ax25_display_timer(&nr
->t4timer
) / HZ
,
1299 ax25_display_timer(&nr
->idletimer
) / (60 * HZ
),
1300 nr
->idle
/ (60 * HZ
),
1304 atomic_read(&s
->sk_wmem_alloc
),
1305 atomic_read(&s
->sk_rmem_alloc
),
1306 s
->sk_socket
? SOCK_INODE(s
->sk_socket
)->i_ino
: 0L);
1313 static struct seq_operations nr_info_seqops
= {
1314 .start
= nr_info_start
,
1315 .next
= nr_info_next
,
1316 .stop
= nr_info_stop
,
1317 .show
= nr_info_show
,
1320 static int nr_info_open(struct inode
*inode
, struct file
*file
)
1322 return seq_open(file
, &nr_info_seqops
);
1325 static struct file_operations nr_info_fops
= {
1326 .owner
= THIS_MODULE
,
1327 .open
= nr_info_open
,
1329 .llseek
= seq_lseek
,
1330 .release
= seq_release
,
1332 #endif /* CONFIG_PROC_FS */
1334 static struct net_proto_family nr_family_ops
= {
1335 .family
= PF_NETROM
,
1336 .create
= nr_create
,
1337 .owner
= THIS_MODULE
,
1340 static struct proto_ops nr_proto_ops
= {
1341 .family
= PF_NETROM
,
1342 .owner
= THIS_MODULE
,
1343 .release
= nr_release
,
1345 .connect
= nr_connect
,
1346 .socketpair
= sock_no_socketpair
,
1347 .accept
= nr_accept
,
1348 .getname
= nr_getname
,
1349 .poll
= datagram_poll
,
1351 .listen
= nr_listen
,
1352 .shutdown
= sock_no_shutdown
,
1353 .setsockopt
= nr_setsockopt
,
1354 .getsockopt
= nr_getsockopt
,
1355 .sendmsg
= nr_sendmsg
,
1356 .recvmsg
= nr_recvmsg
,
1357 .mmap
= sock_no_mmap
,
1358 .sendpage
= sock_no_sendpage
,
1361 static struct notifier_block nr_dev_notifier
= {
1362 .notifier_call
= nr_device_event
,
1365 static struct net_device
**dev_nr
;
1367 static char banner
[] __initdata
= KERN_INFO
"G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n";
1369 static int __init
nr_proto_init(void)
1372 int rc
= proto_register(&nr_proto
, 0);
1377 if (nr_ndevs
> 0x7fffffff/sizeof(struct net_device
*)) {
1378 printk(KERN_ERR
"NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1382 dev_nr
= kmalloc(nr_ndevs
* sizeof(struct net_device
*), GFP_KERNEL
);
1383 if (dev_nr
== NULL
) {
1384 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to allocate device array\n");
1388 memset(dev_nr
, 0x00, nr_ndevs
* sizeof(struct net_device
*));
1390 for (i
= 0; i
< nr_ndevs
; i
++) {
1391 char name
[IFNAMSIZ
];
1392 struct net_device
*dev
;
1394 sprintf(name
, "nr%d", i
);
1395 dev
= alloc_netdev(sizeof(struct nr_private
), name
, nr_setup
);
1397 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to allocate device structure\n");
1402 if (register_netdev(dev
)) {
1403 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to register network device\n");
1410 if (sock_register(&nr_family_ops
)) {
1411 printk(KERN_ERR
"NET/ROM: nr_proto_init - unable to register socket family\n");
1415 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
);