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/capability.h>
15 #include <linux/errno.h>
16 #include <linux/types.h>
17 #include <linux/socket.h>
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/timer.h>
22 #include <linux/string.h>
23 #include <linux/sockios.h>
24 #include <linux/net.h>
25 #include <linux/stat.h>
27 #include <linux/inet.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/skbuff.h>
32 #include <asm/uaccess.h>
33 #include <asm/system.h>
34 #include <linux/fcntl.h>
35 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
37 #include <linux/interrupt.h>
38 #include <linux/notifier.h>
39 #include <net/netrom.h>
40 #include <linux/proc_fs.h>
41 #include <linux/seq_file.h>
43 #include <net/tcp_states.h>
45 #include <linux/init.h>
47 static int nr_ndevs = 4;
49 int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
50 int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
51 int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
52 int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
53 int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
54 int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
55 int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
56 int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
57 int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
58 int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
59 int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
60 int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
62 static unsigned short circuit = 0x101;
64 static HLIST_HEAD(nr_list);
65 static DEFINE_SPINLOCK(nr_list_lock);
67 static const struct proto_ops nr_proto_ops;
70 * Socket removal during an interrupt is now safe.
72 static void nr_remove_socket(struct sock *sk)
74 spin_lock_bh(&nr_list_lock);
76 spin_unlock_bh(&nr_list_lock);
80 * Kill all bound sockets on a dropped device.
82 static void nr_kill_by_device(struct net_device *dev)
85 struct hlist_node *node;
87 spin_lock_bh(&nr_list_lock);
88 sk_for_each(s, node, &nr_list)
89 if (nr_sk(s)->device == dev)
90 nr_disconnect(s, ENETUNREACH);
91 spin_unlock_bh(&nr_list_lock);
95 * Handle device status changes.
97 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
99 struct net_device *dev = (struct net_device *)ptr;
101 if (event != NETDEV_DOWN)
104 nr_kill_by_device(dev);
105 nr_rt_device_down(dev);
111 * Add a socket to the bound sockets list.
113 static void nr_insert_socket(struct sock *sk)
115 spin_lock_bh(&nr_list_lock);
116 sk_add_node(sk, &nr_list);
117 spin_unlock_bh(&nr_list_lock);
121 * Find a socket that wants to accept the Connect Request we just
124 static struct sock *nr_find_listener(ax25_address *addr)
127 struct hlist_node *node;
129 spin_lock_bh(&nr_list_lock);
130 sk_for_each(s, node, &nr_list)
131 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
132 s->sk_state == TCP_LISTEN) {
138 spin_unlock_bh(&nr_list_lock);
143 * Find a connected NET/ROM socket given my circuit IDs.
145 static struct sock *nr_find_socket(unsigned char index, unsigned char id)
148 struct hlist_node *node;
150 spin_lock_bh(&nr_list_lock);
151 sk_for_each(s, node, &nr_list) {
152 struct nr_sock *nr = nr_sk(s);
154 if (nr->my_index == index && nr->my_id == id) {
161 spin_unlock_bh(&nr_list_lock);
166 * Find a connected NET/ROM socket given their circuit IDs.
168 static struct sock *nr_find_peer(unsigned char index, unsigned char id,
172 struct hlist_node *node;
174 spin_lock_bh(&nr_list_lock);
175 sk_for_each(s, node, &nr_list) {
176 struct nr_sock *nr = nr_sk(s);
178 if (nr->your_index == index && nr->your_id == id &&
179 !ax25cmp(&nr->dest_addr, dest)) {
186 spin_unlock_bh(&nr_list_lock);
191 * Find next free circuit ID.
193 static unsigned short nr_find_next_circuit(void)
195 unsigned short id = circuit;
203 if (i != 0 && j != 0) {
204 if ((sk=nr_find_socket(i, j)) == NULL)
218 void nr_destroy_socket(struct sock *);
221 * Handler for deferred kills.
223 static void nr_destroy_timer(unsigned long data)
225 struct sock *sk=(struct sock *)data;
228 nr_destroy_socket(sk);
234 * This is called from user mode and the timers. Thus it protects itself
235 * against interrupt users but doesn't worry about being called during
236 * work. Once it is removed from the queue no interrupt or bottom half
237 * will touch it and we are (fairly 8-) ) safe.
239 void nr_destroy_socket(struct sock *sk)
243 nr_remove_socket(sk);
245 nr_stop_heartbeat(sk);
249 nr_stop_idletimer(sk);
251 nr_clear_queues(sk); /* Flush the queues */
253 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
254 if (skb->sk != sk) { /* A pending connection */
255 /* Queue the unaccepted socket for death */
256 sock_set_flag(skb->sk, SOCK_DEAD);
257 nr_start_heartbeat(skb->sk);
258 nr_sk(skb->sk)->state = NR_STATE_0;
264 if (atomic_read(&sk->sk_wmem_alloc) ||
265 atomic_read(&sk->sk_rmem_alloc)) {
266 /* Defer: outstanding buffers */
267 sk->sk_timer.function = nr_destroy_timer;
268 sk->sk_timer.expires = jiffies + 2 * HZ;
269 add_timer(&sk->sk_timer);
275 * Handling for system calls applied via the various interfaces to a
276 * NET/ROM socket object.
279 static int nr_setsockopt(struct socket *sock, int level, int optname,
280 char __user *optval, int optlen)
282 struct sock *sk = sock->sk;
283 struct nr_sock *nr = nr_sk(sk);
286 if (level != SOL_NETROM)
289 if (optlen < sizeof(int))
292 if (get_user(opt, (int __user *)optval))
309 if (opt < 1 || opt > 31)
323 nr->idle = opt * 60 * HZ;
331 static int nr_getsockopt(struct socket *sock, int level, int optname,
332 char __user *optval, int __user *optlen)
334 struct sock *sk = sock->sk;
335 struct nr_sock *nr = nr_sk(sk);
339 if (level != SOL_NETROM)
342 if (get_user(len, optlen))
366 val = nr->idle / (60 * HZ);
373 len = min_t(unsigned int, len, sizeof(int));
375 if (put_user(len, optlen))
378 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
381 static int nr_listen(struct socket *sock, int backlog)
383 struct sock *sk = sock->sk;
386 if (sk->sk_state != TCP_LISTEN) {
387 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
388 sk->sk_max_ack_backlog = backlog;
389 sk->sk_state = TCP_LISTEN;
398 static struct proto nr_proto = {
400 .owner = THIS_MODULE,
401 .obj_size = sizeof(struct nr_sock),
404 static int nr_create(struct socket *sock, int protocol)
409 if (sock->type != SOCK_SEQPACKET || protocol != 0)
410 return -ESOCKTNOSUPPORT;
412 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
417 sock_init_data(sock, sk);
419 sock->ops = &nr_proto_ops;
420 sk->sk_protocol = protocol;
422 skb_queue_head_init(&nr->ack_queue);
423 skb_queue_head_init(&nr->reseq_queue);
424 skb_queue_head_init(&nr->frag_queue);
429 msecs_to_jiffies(sysctl_netrom_transport_timeout);
431 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
433 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
435 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
437 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
438 nr->window = sysctl_netrom_transport_requested_window_size;
441 nr->state = NR_STATE_0;
446 static struct sock *nr_make_new(struct sock *osk)
449 struct nr_sock *nr, *onr;
451 if (osk->sk_type != SOCK_SEQPACKET)
454 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
459 sock_init_data(NULL, sk);
461 sk->sk_type = osk->sk_type;
462 sk->sk_socket = osk->sk_socket;
463 sk->sk_priority = osk->sk_priority;
464 sk->sk_protocol = osk->sk_protocol;
465 sk->sk_rcvbuf = osk->sk_rcvbuf;
466 sk->sk_sndbuf = osk->sk_sndbuf;
467 sk->sk_state = TCP_ESTABLISHED;
468 sk->sk_sleep = osk->sk_sleep;
469 sock_copy_flags(sk, osk);
471 skb_queue_head_init(&nr->ack_queue);
472 skb_queue_head_init(&nr->reseq_queue);
473 skb_queue_head_init(&nr->frag_queue);
483 nr->idle = onr->idle;
484 nr->window = onr->window;
486 nr->device = onr->device;
487 nr->bpqext = onr->bpqext;
492 static int nr_release(struct socket *sock)
494 struct sock *sk = sock->sk;
497 if (sk == NULL) return 0;
507 nr_disconnect(sk, 0);
508 nr_destroy_socket(sk);
514 nr_write_internal(sk, NR_DISCREQ);
515 nr_start_t1timer(sk);
518 nr_stop_idletimer(sk);
519 nr->state = NR_STATE_2;
520 sk->sk_state = TCP_CLOSE;
521 sk->sk_shutdown |= SEND_SHUTDOWN;
522 sk->sk_state_change(sk);
524 sock_set_flag(sk, SOCK_DESTROY);
525 sk->sk_socket = NULL;
529 sk->sk_socket = NULL;
540 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
542 struct sock *sk = sock->sk;
543 struct nr_sock *nr = nr_sk(sk);
544 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
545 struct net_device *dev;
546 ax25_uid_assoc *user;
547 ax25_address *source;
550 if (!sock_flag(sk, SOCK_ZAPPED)) {
554 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
558 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
562 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
566 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
567 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
569 return -EADDRNOTAVAIL;
573 * Only the super user can set an arbitrary user callsign.
575 if (addr->fsa_ax25.sax25_ndigis == 1) {
576 if (!capable(CAP_NET_BIND_SERVICE)) {
581 nr->user_addr = addr->fsa_digipeater[0];
582 nr->source_addr = addr->fsa_ax25.sax25_call;
584 source = &addr->fsa_ax25.sax25_call;
586 user = ax25_findbyuid(current->euid);
588 nr->user_addr = user->call;
591 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
596 nr->user_addr = *source;
599 nr->source_addr = *source;
603 nr_insert_socket(sk);
605 sock_reset_flag(sk, SOCK_ZAPPED);
608 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
612 static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
613 int addr_len, int flags)
615 struct sock *sk = sock->sk;
616 struct nr_sock *nr = nr_sk(sk);
617 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
618 ax25_address *source = NULL;
619 ax25_uid_assoc *user;
620 struct net_device *dev;
623 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
624 sock->state = SS_CONNECTED;
626 return 0; /* Connect completed during a ERESTARTSYS event */
629 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
630 sock->state = SS_UNCONNECTED;
632 return -ECONNREFUSED;
635 if (sk->sk_state == TCP_ESTABLISHED) {
637 return -EISCONN; /* No reconnect on a seqpacket socket */
640 sk->sk_state = TCP_CLOSE;
641 sock->state = SS_UNCONNECTED;
643 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
647 if (addr->sax25_family != AF_NETROM) {
651 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
652 sock_reset_flag(sk, SOCK_ZAPPED);
654 if ((dev = nr_dev_first()) == NULL) {
658 source = (ax25_address *)dev->dev_addr;
660 user = ax25_findbyuid(current->euid);
662 nr->user_addr = user->call;
665 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
670 nr->user_addr = *source;
673 nr->source_addr = *source;
677 nr_insert_socket(sk); /* Finish the bind */
680 nr->dest_addr = addr->sax25_call;
683 circuit = nr_find_next_circuit();
686 nr->my_index = circuit / 256;
687 nr->my_id = circuit % 256;
691 /* Move to connecting socket, start sending Connect Requests */
692 sock->state = SS_CONNECTING;
693 sk->sk_state = TCP_SYN_SENT;
695 nr_establish_data_link(sk);
697 nr->state = NR_STATE_1;
699 nr_start_heartbeat(sk);
702 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
708 * A Connect Ack with Choke or timeout or failed routing will go to
711 if (sk->sk_state == TCP_SYN_SENT) {
712 struct task_struct *tsk = current;
713 DECLARE_WAITQUEUE(wait, tsk);
715 add_wait_queue(sk->sk_sleep, &wait);
717 set_current_state(TASK_INTERRUPTIBLE);
718 if (sk->sk_state != TCP_SYN_SENT)
721 if (!signal_pending(tsk)) {
726 current->state = TASK_RUNNING;
727 remove_wait_queue(sk->sk_sleep, &wait);
730 current->state = TASK_RUNNING;
731 remove_wait_queue(sk->sk_sleep, &wait);
734 if (sk->sk_state != TCP_ESTABLISHED) {
735 sock->state = SS_UNCONNECTED;
737 return sock_error(sk); /* Always set at this point */
740 sock->state = SS_CONNECTED;
746 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
748 struct task_struct *tsk = current;
749 DECLARE_WAITQUEUE(wait, tsk);
755 if ((sk = sock->sk) == NULL)
759 if (sk->sk_type != SOCK_SEQPACKET) {
764 if (sk->sk_state != TCP_LISTEN) {
770 * The write queue this time is holding sockets ready to use
771 * hooked into the SABM we saved
773 add_wait_queue(sk->sk_sleep, &wait);
775 skb = skb_dequeue(&sk->sk_receive_queue);
779 current->state = TASK_INTERRUPTIBLE;
781 if (flags & O_NONBLOCK) {
782 current->state = TASK_RUNNING;
783 remove_wait_queue(sk->sk_sleep, &wait);
786 if (!signal_pending(tsk)) {
791 current->state = TASK_RUNNING;
792 remove_wait_queue(sk->sk_sleep, &wait);
795 current->state = TASK_RUNNING;
796 remove_wait_queue(sk->sk_sleep, &wait);
799 newsk->sk_socket = newsock;
800 newsk->sk_sleep = &newsock->wait;
802 /* Now attach up the new socket */
804 sk->sk_ack_backlog--;
812 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
813 int *uaddr_len, int peer)
815 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
816 struct sock *sk = sock->sk;
817 struct nr_sock *nr = nr_sk(sk);
821 if (sk->sk_state != TCP_ESTABLISHED) {
825 sax->fsa_ax25.sax25_family = AF_NETROM;
826 sax->fsa_ax25.sax25_ndigis = 1;
827 sax->fsa_ax25.sax25_call = nr->user_addr;
828 sax->fsa_digipeater[0] = nr->dest_addr;
829 *uaddr_len = sizeof(struct full_sockaddr_ax25);
831 sax->fsa_ax25.sax25_family = AF_NETROM;
832 sax->fsa_ax25.sax25_ndigis = 0;
833 sax->fsa_ax25.sax25_call = nr->source_addr;
834 *uaddr_len = sizeof(struct sockaddr_ax25);
841 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
845 struct nr_sock *nr_make;
846 ax25_address *src, *dest, *user;
847 unsigned short circuit_index, circuit_id;
848 unsigned short peer_circuit_index, peer_circuit_id;
849 unsigned short frametype, flags, window, timeout;
852 skb->sk = NULL; /* Initially we don't know who it's for */
855 * skb->data points to the netrom frame start
858 src = (ax25_address *)(skb->data + 0);
859 dest = (ax25_address *)(skb->data + 7);
861 circuit_index = skb->data[15];
862 circuit_id = skb->data[16];
863 peer_circuit_index = skb->data[17];
864 peer_circuit_id = skb->data[18];
865 frametype = skb->data[19] & 0x0F;
866 flags = skb->data[19] & 0xF0;
869 * Check for an incoming IP over NET/ROM frame.
871 if (frametype == NR_PROTOEXT &&
872 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
873 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
874 skb->h.raw = skb->data;
876 return nr_rx_ip(skb, dev);
880 * Find an existing socket connection, based on circuit ID, if it's
881 * a Connect Request base it on their circuit ID.
883 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
884 * circuit that no longer exists at the other end ...
889 if (circuit_index == 0 && circuit_id == 0) {
890 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
891 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
893 if (frametype == NR_CONNREQ)
894 sk = nr_find_peer(circuit_index, circuit_id, src);
896 sk = nr_find_socket(circuit_index, circuit_id);
900 skb->h.raw = skb->data;
902 if (frametype == NR_CONNACK && skb->len == 22)
903 nr_sk(sk)->bpqext = 1;
905 nr_sk(sk)->bpqext = 0;
907 ret = nr_process_rx_frame(sk, skb);
913 * Now it should be a CONNREQ.
915 if (frametype != NR_CONNREQ) {
917 * Here it would be nice to be able to send a reset but
918 * NET/ROM doesn't have one. We've tried to extend the protocol
919 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
920 * apparently kills BPQ boxes... :-(
921 * So now we try to follow the established behaviour of
922 * G8PZT's Xrouter which is sending packets with command type 7
923 * as an extension of the protocol.
925 if (sysctl_netrom_reset_circuit &&
926 (frametype != NR_RESET || flags != 0))
927 nr_transmit_reset(skb, 1);
932 sk = nr_find_listener(dest);
934 user = (ax25_address *)(skb->data + 21);
936 if (sk == NULL || sk_acceptq_is_full(sk) ||
937 (make = nr_make_new(sk)) == NULL) {
938 nr_transmit_refusal(skb, 0);
944 window = skb->data[20];
947 make->sk_state = TCP_ESTABLISHED;
949 /* Fill in his circuit details */
950 nr_make = nr_sk(make);
951 nr_make->source_addr = *dest;
952 nr_make->dest_addr = *src;
953 nr_make->user_addr = *user;
955 nr_make->your_index = circuit_index;
956 nr_make->your_id = circuit_id;
959 circuit = nr_find_next_circuit();
962 nr_make->my_index = circuit / 256;
963 nr_make->my_id = circuit % 256;
967 /* Window negotiation */
968 if (window < nr_make->window)
969 nr_make->window = window;
971 /* L4 timeout negotiation */
972 if (skb->len == 37) {
973 timeout = skb->data[36] * 256 + skb->data[35];
974 if (timeout * HZ < nr_make->t1)
975 nr_make->t1 = timeout * HZ;
981 nr_write_internal(make, NR_CONNACK);
983 nr_make->condition = 0x00;
988 nr_make->state = NR_STATE_3;
989 sk->sk_ack_backlog++;
991 nr_insert_socket(make);
993 skb_queue_head(&sk->sk_receive_queue, skb);
995 nr_start_heartbeat(make);
996 nr_start_idletimer(make);
998 if (!sock_flag(sk, SOCK_DEAD))
999 sk->sk_data_ready(sk, skb->len);
1005 static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1006 struct msghdr *msg, size_t len)
1008 struct sock *sk = sock->sk;
1009 struct nr_sock *nr = nr_sk(sk);
1010 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1012 struct sockaddr_ax25 sax;
1013 struct sk_buff *skb;
1014 unsigned char *asmptr;
1017 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1021 if (sock_flag(sk, SOCK_ZAPPED)) {
1022 err = -EADDRNOTAVAIL;
1026 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1027 send_sig(SIGPIPE, current, 0);
1032 if (nr->device == NULL) {
1038 if (msg->msg_namelen < sizeof(sax)) {
1043 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1047 if (sax.sax25_family != AF_NETROM) {
1052 if (sk->sk_state != TCP_ESTABLISHED) {
1056 sax.sax25_family = AF_NETROM;
1057 sax.sax25_call = nr->dest_addr;
1060 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1062 /* Build a packet */
1063 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1064 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1066 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1069 skb_reserve(skb, size - len);
1072 * Push down the NET/ROM header
1075 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1076 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1078 /* Build a NET/ROM Transport header */
1080 *asmptr++ = nr->your_index;
1081 *asmptr++ = nr->your_id;
1082 *asmptr++ = 0; /* To be filled in later */
1083 *asmptr++ = 0; /* Ditto */
1084 *asmptr++ = NR_INFO;
1085 SOCK_DEBUG(sk, "Built header.\n");
1088 * Put the data on the end
1091 skb->h.raw = skb_put(skb, len);
1093 asmptr = skb->h.raw;
1094 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1096 /* User data follows immediately after the NET/ROM transport header */
1097 if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
1103 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1105 if (sk->sk_state != TCP_ESTABLISHED) {
1111 nr_output(sk, skb); /* Shove it onto the queue */
1119 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1120 struct msghdr *msg, size_t size, int flags)
1122 struct sock *sk = sock->sk;
1123 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1125 struct sk_buff *skb;
1129 * This works for seqpacket too. The receiver has ordered the queue for
1130 * us! We do one quick check first though
1134 if (sk->sk_state != TCP_ESTABLISHED) {
1139 /* Now we can treat all alike */
1140 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1145 skb->h.raw = skb->data;
1148 if (copied > size) {
1150 msg->msg_flags |= MSG_TRUNC;
1153 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1156 sax->sax25_family = AF_NETROM;
1157 memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN);
1160 msg->msg_namelen = sizeof(*sax);
1162 skb_free_datagram(sk, skb);
1169 static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1171 struct sock *sk = sock->sk;
1172 void __user *argp = (void __user *)arg;
1180 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1184 return put_user(amount, (int __user *)argp);
1188 struct sk_buff *skb;
1192 /* These two are safe on a single CPU system as only user tasks fiddle here */
1193 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1196 return put_user(amount, (int __user *)argp);
1201 ret = sock_get_timestamp(sk, argp);
1207 case SIOCGIFDSTADDR:
1208 case SIOCSIFDSTADDR:
1209 case SIOCGIFBRDADDR:
1210 case SIOCSIFBRDADDR:
1211 case SIOCGIFNETMASK:
1212 case SIOCSIFNETMASK:
1220 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1221 return nr_rt_ioctl(cmd, argp);
1224 return -ENOIOCTLCMD;
1230 #ifdef CONFIG_PROC_FS
1232 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1235 struct hlist_node *node;
1238 spin_lock_bh(&nr_list_lock);
1240 return SEQ_START_TOKEN;
1242 sk_for_each(s, node, &nr_list) {
1250 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1254 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1255 : sk_next((struct sock *)v);
1258 static void nr_info_stop(struct seq_file *seq, void *v)
1260 spin_unlock_bh(&nr_list_lock);
1263 static int nr_info_show(struct seq_file *seq, void *v)
1266 struct net_device *dev;
1268 const char *devname;
1271 if (v == SEQ_START_TOKEN)
1273 "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");
1280 if ((dev = nr->device) == NULL)
1283 devname = dev->name;
1285 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1286 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1288 "%-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",
1289 ax2asc(buf, &nr->source_addr),
1299 ax25_display_timer(&nr->t1timer) / HZ,
1301 ax25_display_timer(&nr->t2timer) / HZ,
1303 ax25_display_timer(&nr->t4timer) / HZ,
1305 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1306 nr->idle / (60 * HZ),
1310 atomic_read(&s->sk_wmem_alloc),
1311 atomic_read(&s->sk_rmem_alloc),
1312 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1319 static struct seq_operations nr_info_seqops = {
1320 .start = nr_info_start,
1321 .next = nr_info_next,
1322 .stop = nr_info_stop,
1323 .show = nr_info_show,
1326 static int nr_info_open(struct inode *inode, struct file *file)
1328 return seq_open(file, &nr_info_seqops);
1331 static struct file_operations nr_info_fops = {
1332 .owner = THIS_MODULE,
1333 .open = nr_info_open,
1335 .llseek = seq_lseek,
1336 .release = seq_release,
1338 #endif /* CONFIG_PROC_FS */
1340 static struct net_proto_family nr_family_ops = {
1341 .family = PF_NETROM,
1342 .create = nr_create,
1343 .owner = THIS_MODULE,
1346 static const struct proto_ops nr_proto_ops = {
1347 .family = PF_NETROM,
1348 .owner = THIS_MODULE,
1349 .release = nr_release,
1351 .connect = nr_connect,
1352 .socketpair = sock_no_socketpair,
1353 .accept = nr_accept,
1354 .getname = nr_getname,
1355 .poll = datagram_poll,
1357 .listen = nr_listen,
1358 .shutdown = sock_no_shutdown,
1359 .setsockopt = nr_setsockopt,
1360 .getsockopt = nr_getsockopt,
1361 .sendmsg = nr_sendmsg,
1362 .recvmsg = nr_recvmsg,
1363 .mmap = sock_no_mmap,
1364 .sendpage = sock_no_sendpage,
1367 static struct notifier_block nr_dev_notifier = {
1368 .notifier_call = nr_device_event,
1371 static struct net_device **dev_nr;
1373 static int __init nr_proto_init(void)
1376 int rc = proto_register(&nr_proto, 0);
1381 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1382 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1386 dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1387 if (dev_nr == NULL) {
1388 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1392 memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *));
1394 for (i = 0; i < nr_ndevs; i++) {
1395 char name[IFNAMSIZ];
1396 struct net_device *dev;
1398 sprintf(name, "nr%d", i);
1399 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1401 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1406 if (register_netdev(dev)) {
1407 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1414 if (sock_register(&nr_family_ops)) {
1415 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1419 register_netdevice_notifier(&nr_dev_notifier);
1421 ax25_protocol_register(AX25_P_NETROM, nr_route_frame);
1422 ax25_linkfail_register(nr_link_failed);
1424 #ifdef CONFIG_SYSCTL
1425 nr_register_sysctl();
1430 proc_net_fops_create("nr", S_IRUGO, &nr_info_fops);
1431 proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops);
1432 proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops);
1437 unregister_netdev(dev_nr[i]);
1438 free_netdev(dev_nr[i]);
1441 proto_unregister(&nr_proto);
1446 module_init(nr_proto_init);
1448 module_param(nr_ndevs, int, 0);
1449 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1451 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1452 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1453 MODULE_LICENSE("GPL");
1454 MODULE_ALIAS_NETPROTO(PF_NETROM);
1456 static void __exit nr_exit(void)
1460 proc_net_remove("nr");
1461 proc_net_remove("nr_neigh");
1462 proc_net_remove("nr_nodes");
1463 nr_loopback_clear();
1467 #ifdef CONFIG_SYSCTL
1468 nr_unregister_sysctl();
1471 ax25_linkfail_release(nr_link_failed);
1472 ax25_protocol_release(AX25_P_NETROM);
1474 unregister_netdevice_notifier(&nr_dev_notifier);
1476 sock_unregister(PF_NETROM);
1478 for (i = 0; i < nr_ndevs; i++) {
1479 struct net_device *dev = dev_nr[i];
1481 unregister_netdev(dev);
1487 proto_unregister(&nr_proto);
1489 module_exit(nr_exit);