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>
30 #include <net/net_namespace.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 * NETROM network devices are virtual network devices encapsulating NETROM
71 * frames into AX.25 which will be sent through an AX.25 device, so form a
72 * special "super class" of normal net devices; split their locks off into a
73 * separate class since they always nest.
75 static struct lock_class_key nr_netdev_xmit_lock_key;
77 static void nr_set_lockdep_one(struct netdev_queue *txq)
79 lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key);
82 static void nr_set_lockdep_key(struct net_device *dev)
84 nr_set_lockdep_one(&dev->tx_queue);
88 * Socket removal during an interrupt is now safe.
90 static void nr_remove_socket(struct sock *sk)
92 spin_lock_bh(&nr_list_lock);
94 spin_unlock_bh(&nr_list_lock);
98 * Kill all bound sockets on a dropped device.
100 static void nr_kill_by_device(struct net_device *dev)
103 struct hlist_node *node;
105 spin_lock_bh(&nr_list_lock);
106 sk_for_each(s, node, &nr_list)
107 if (nr_sk(s)->device == dev)
108 nr_disconnect(s, ENETUNREACH);
109 spin_unlock_bh(&nr_list_lock);
113 * Handle device status changes.
115 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
117 struct net_device *dev = (struct net_device *)ptr;
119 if (dev_net(dev) != &init_net)
122 if (event != NETDEV_DOWN)
125 nr_kill_by_device(dev);
126 nr_rt_device_down(dev);
132 * Add a socket to the bound sockets list.
134 static void nr_insert_socket(struct sock *sk)
136 spin_lock_bh(&nr_list_lock);
137 sk_add_node(sk, &nr_list);
138 spin_unlock_bh(&nr_list_lock);
142 * Find a socket that wants to accept the Connect Request we just
145 static struct sock *nr_find_listener(ax25_address *addr)
148 struct hlist_node *node;
150 spin_lock_bh(&nr_list_lock);
151 sk_for_each(s, node, &nr_list)
152 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
153 s->sk_state == TCP_LISTEN) {
159 spin_unlock_bh(&nr_list_lock);
164 * Find a connected NET/ROM socket given my circuit IDs.
166 static struct sock *nr_find_socket(unsigned char index, unsigned char id)
169 struct hlist_node *node;
171 spin_lock_bh(&nr_list_lock);
172 sk_for_each(s, node, &nr_list) {
173 struct nr_sock *nr = nr_sk(s);
175 if (nr->my_index == index && nr->my_id == id) {
182 spin_unlock_bh(&nr_list_lock);
187 * Find a connected NET/ROM socket given their circuit IDs.
189 static struct sock *nr_find_peer(unsigned char index, unsigned char id,
193 struct hlist_node *node;
195 spin_lock_bh(&nr_list_lock);
196 sk_for_each(s, node, &nr_list) {
197 struct nr_sock *nr = nr_sk(s);
199 if (nr->your_index == index && nr->your_id == id &&
200 !ax25cmp(&nr->dest_addr, dest)) {
207 spin_unlock_bh(&nr_list_lock);
212 * Find next free circuit ID.
214 static unsigned short nr_find_next_circuit(void)
216 unsigned short id = circuit;
224 if (i != 0 && j != 0) {
225 if ((sk=nr_find_socket(i, j)) == NULL)
239 void nr_destroy_socket(struct sock *);
242 * Handler for deferred kills.
244 static void nr_destroy_timer(unsigned long data)
246 struct sock *sk=(struct sock *)data;
249 nr_destroy_socket(sk);
255 * This is called from user mode and the timers. Thus it protects itself
256 * against interrupt users but doesn't worry about being called during
257 * work. Once it is removed from the queue no interrupt or bottom half
258 * will touch it and we are (fairly 8-) ) safe.
260 void nr_destroy_socket(struct sock *sk)
264 nr_remove_socket(sk);
266 nr_stop_heartbeat(sk);
270 nr_stop_idletimer(sk);
272 nr_clear_queues(sk); /* Flush the queues */
274 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
275 if (skb->sk != sk) { /* A pending connection */
276 /* Queue the unaccepted socket for death */
277 sock_set_flag(skb->sk, SOCK_DEAD);
278 nr_start_heartbeat(skb->sk);
279 nr_sk(skb->sk)->state = NR_STATE_0;
285 if (atomic_read(&sk->sk_wmem_alloc) ||
286 atomic_read(&sk->sk_rmem_alloc)) {
287 /* Defer: outstanding buffers */
288 sk->sk_timer.function = nr_destroy_timer;
289 sk->sk_timer.expires = jiffies + 2 * HZ;
290 add_timer(&sk->sk_timer);
296 * Handling for system calls applied via the various interfaces to a
297 * NET/ROM socket object.
300 static int nr_setsockopt(struct socket *sock, int level, int optname,
301 char __user *optval, int optlen)
303 struct sock *sk = sock->sk;
304 struct nr_sock *nr = nr_sk(sk);
307 if (level != SOL_NETROM)
310 if (optlen < sizeof(int))
313 if (get_user(opt, (int __user *)optval))
330 if (opt < 1 || opt > 31)
344 nr->idle = opt * 60 * HZ;
352 static int nr_getsockopt(struct socket *sock, int level, int optname,
353 char __user *optval, int __user *optlen)
355 struct sock *sk = sock->sk;
356 struct nr_sock *nr = nr_sk(sk);
360 if (level != SOL_NETROM)
363 if (get_user(len, optlen))
387 val = nr->idle / (60 * HZ);
394 len = min_t(unsigned int, len, sizeof(int));
396 if (put_user(len, optlen))
399 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
402 static int nr_listen(struct socket *sock, int backlog)
404 struct sock *sk = sock->sk;
407 if (sk->sk_state != TCP_LISTEN) {
408 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
409 sk->sk_max_ack_backlog = backlog;
410 sk->sk_state = TCP_LISTEN;
419 static struct proto nr_proto = {
421 .owner = THIS_MODULE,
422 .obj_size = sizeof(struct nr_sock),
425 static int nr_create(struct net *net, struct socket *sock, int protocol)
430 if (net != &init_net)
431 return -EAFNOSUPPORT;
433 if (sock->type != SOCK_SEQPACKET || protocol != 0)
434 return -ESOCKTNOSUPPORT;
436 sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto);
442 sock_init_data(sock, sk);
444 sock->ops = &nr_proto_ops;
445 sk->sk_protocol = protocol;
447 skb_queue_head_init(&nr->ack_queue);
448 skb_queue_head_init(&nr->reseq_queue);
449 skb_queue_head_init(&nr->frag_queue);
454 msecs_to_jiffies(sysctl_netrom_transport_timeout);
456 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
458 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
460 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
462 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
463 nr->window = sysctl_netrom_transport_requested_window_size;
466 nr->state = NR_STATE_0;
471 static struct sock *nr_make_new(struct sock *osk)
474 struct nr_sock *nr, *onr;
476 if (osk->sk_type != SOCK_SEQPACKET)
479 sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot);
485 sock_init_data(NULL, sk);
487 sk->sk_type = osk->sk_type;
488 sk->sk_priority = osk->sk_priority;
489 sk->sk_protocol = osk->sk_protocol;
490 sk->sk_rcvbuf = osk->sk_rcvbuf;
491 sk->sk_sndbuf = osk->sk_sndbuf;
492 sk->sk_state = TCP_ESTABLISHED;
493 sock_copy_flags(sk, osk);
495 skb_queue_head_init(&nr->ack_queue);
496 skb_queue_head_init(&nr->reseq_queue);
497 skb_queue_head_init(&nr->frag_queue);
507 nr->idle = onr->idle;
508 nr->window = onr->window;
510 nr->device = onr->device;
511 nr->bpqext = onr->bpqext;
516 static int nr_release(struct socket *sock)
518 struct sock *sk = sock->sk;
521 if (sk == NULL) return 0;
531 nr_disconnect(sk, 0);
532 nr_destroy_socket(sk);
538 nr_write_internal(sk, NR_DISCREQ);
539 nr_start_t1timer(sk);
542 nr_stop_idletimer(sk);
543 nr->state = NR_STATE_2;
544 sk->sk_state = TCP_CLOSE;
545 sk->sk_shutdown |= SEND_SHUTDOWN;
546 sk->sk_state_change(sk);
548 sock_set_flag(sk, SOCK_DESTROY);
562 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
564 struct sock *sk = sock->sk;
565 struct nr_sock *nr = nr_sk(sk);
566 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
567 struct net_device *dev;
568 ax25_uid_assoc *user;
569 ax25_address *source;
572 if (!sock_flag(sk, SOCK_ZAPPED)) {
576 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
580 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
584 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
588 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
589 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
591 return -EADDRNOTAVAIL;
595 * Only the super user can set an arbitrary user callsign.
597 if (addr->fsa_ax25.sax25_ndigis == 1) {
598 if (!capable(CAP_NET_BIND_SERVICE)) {
603 nr->user_addr = addr->fsa_digipeater[0];
604 nr->source_addr = addr->fsa_ax25.sax25_call;
606 source = &addr->fsa_ax25.sax25_call;
608 user = ax25_findbyuid(current->euid);
610 nr->user_addr = user->call;
613 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
618 nr->user_addr = *source;
621 nr->source_addr = *source;
625 nr_insert_socket(sk);
627 sock_reset_flag(sk, SOCK_ZAPPED);
630 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
634 static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
635 int addr_len, int flags)
637 struct sock *sk = sock->sk;
638 struct nr_sock *nr = nr_sk(sk);
639 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
640 ax25_address *source = NULL;
641 ax25_uid_assoc *user;
642 struct net_device *dev;
646 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
647 sock->state = SS_CONNECTED;
648 goto out_release; /* Connect completed during a ERESTARTSYS event */
651 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
652 sock->state = SS_UNCONNECTED;
657 if (sk->sk_state == TCP_ESTABLISHED) {
658 err = -EISCONN; /* No reconnect on a seqpacket socket */
662 sk->sk_state = TCP_CLOSE;
663 sock->state = SS_UNCONNECTED;
665 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
669 if (addr->sax25_family != AF_NETROM) {
673 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
674 sock_reset_flag(sk, SOCK_ZAPPED);
676 if ((dev = nr_dev_first()) == NULL) {
680 source = (ax25_address *)dev->dev_addr;
682 user = ax25_findbyuid(current->euid);
684 nr->user_addr = user->call;
687 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
692 nr->user_addr = *source;
695 nr->source_addr = *source;
699 nr_insert_socket(sk); /* Finish the bind */
702 nr->dest_addr = addr->sax25_call;
705 circuit = nr_find_next_circuit();
708 nr->my_index = circuit / 256;
709 nr->my_id = circuit % 256;
713 /* Move to connecting socket, start sending Connect Requests */
714 sock->state = SS_CONNECTING;
715 sk->sk_state = TCP_SYN_SENT;
717 nr_establish_data_link(sk);
719 nr->state = NR_STATE_1;
721 nr_start_heartbeat(sk);
724 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
730 * A Connect Ack with Choke or timeout or failed routing will go to
733 if (sk->sk_state == TCP_SYN_SENT) {
737 prepare_to_wait(sk->sk_sleep, &wait,
739 if (sk->sk_state != TCP_SYN_SENT)
741 if (!signal_pending(current)) {
750 finish_wait(sk->sk_sleep, &wait);
755 if (sk->sk_state != TCP_ESTABLISHED) {
756 sock->state = SS_UNCONNECTED;
757 err = sock_error(sk); /* Always set at this point */
761 sock->state = SS_CONNECTED;
769 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
777 if ((sk = sock->sk) == NULL)
781 if (sk->sk_type != SOCK_SEQPACKET) {
786 if (sk->sk_state != TCP_LISTEN) {
792 * The write queue this time is holding sockets ready to use
793 * hooked into the SABM we saved
796 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
797 skb = skb_dequeue(&sk->sk_receive_queue);
801 if (flags & O_NONBLOCK) {
805 if (!signal_pending(current)) {
814 finish_wait(sk->sk_sleep, &wait);
819 sock_graft(newsk, newsock);
821 /* Now attach up the new socket */
823 sk_acceptq_removed(sk);
831 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
832 int *uaddr_len, int peer)
834 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
835 struct sock *sk = sock->sk;
836 struct nr_sock *nr = nr_sk(sk);
840 if (sk->sk_state != TCP_ESTABLISHED) {
844 sax->fsa_ax25.sax25_family = AF_NETROM;
845 sax->fsa_ax25.sax25_ndigis = 1;
846 sax->fsa_ax25.sax25_call = nr->user_addr;
847 sax->fsa_digipeater[0] = nr->dest_addr;
848 *uaddr_len = sizeof(struct full_sockaddr_ax25);
850 sax->fsa_ax25.sax25_family = AF_NETROM;
851 sax->fsa_ax25.sax25_ndigis = 0;
852 sax->fsa_ax25.sax25_call = nr->source_addr;
853 *uaddr_len = sizeof(struct sockaddr_ax25);
860 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
864 struct nr_sock *nr_make;
865 ax25_address *src, *dest, *user;
866 unsigned short circuit_index, circuit_id;
867 unsigned short peer_circuit_index, peer_circuit_id;
868 unsigned short frametype, flags, window, timeout;
871 skb->sk = NULL; /* Initially we don't know who it's for */
874 * skb->data points to the netrom frame start
877 src = (ax25_address *)(skb->data + 0);
878 dest = (ax25_address *)(skb->data + 7);
880 circuit_index = skb->data[15];
881 circuit_id = skb->data[16];
882 peer_circuit_index = skb->data[17];
883 peer_circuit_id = skb->data[18];
884 frametype = skb->data[19] & 0x0F;
885 flags = skb->data[19] & 0xF0;
888 * Check for an incoming IP over NET/ROM frame.
890 if (frametype == NR_PROTOEXT &&
891 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
892 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
893 skb_reset_transport_header(skb);
895 return nr_rx_ip(skb, dev);
899 * Find an existing socket connection, based on circuit ID, if it's
900 * a Connect Request base it on their circuit ID.
902 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
903 * circuit that no longer exists at the other end ...
908 if (circuit_index == 0 && circuit_id == 0) {
909 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
910 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
912 if (frametype == NR_CONNREQ)
913 sk = nr_find_peer(circuit_index, circuit_id, src);
915 sk = nr_find_socket(circuit_index, circuit_id);
919 skb_reset_transport_header(skb);
921 if (frametype == NR_CONNACK && skb->len == 22)
922 nr_sk(sk)->bpqext = 1;
924 nr_sk(sk)->bpqext = 0;
926 ret = nr_process_rx_frame(sk, skb);
932 * Now it should be a CONNREQ.
934 if (frametype != NR_CONNREQ) {
936 * Here it would be nice to be able to send a reset but
937 * NET/ROM doesn't have one. We've tried to extend the protocol
938 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
939 * apparently kills BPQ boxes... :-(
940 * So now we try to follow the established behaviour of
941 * G8PZT's Xrouter which is sending packets with command type 7
942 * as an extension of the protocol.
944 if (sysctl_netrom_reset_circuit &&
945 (frametype != NR_RESET || flags != 0))
946 nr_transmit_reset(skb, 1);
951 sk = nr_find_listener(dest);
953 user = (ax25_address *)(skb->data + 21);
955 if (sk == NULL || sk_acceptq_is_full(sk) ||
956 (make = nr_make_new(sk)) == NULL) {
957 nr_transmit_refusal(skb, 0);
963 window = skb->data[20];
966 make->sk_state = TCP_ESTABLISHED;
968 /* Fill in his circuit details */
969 nr_make = nr_sk(make);
970 nr_make->source_addr = *dest;
971 nr_make->dest_addr = *src;
972 nr_make->user_addr = *user;
974 nr_make->your_index = circuit_index;
975 nr_make->your_id = circuit_id;
978 circuit = nr_find_next_circuit();
981 nr_make->my_index = circuit / 256;
982 nr_make->my_id = circuit % 256;
986 /* Window negotiation */
987 if (window < nr_make->window)
988 nr_make->window = window;
990 /* L4 timeout negotiation */
991 if (skb->len == 37) {
992 timeout = skb->data[36] * 256 + skb->data[35];
993 if (timeout * HZ < nr_make->t1)
994 nr_make->t1 = timeout * HZ;
1000 nr_write_internal(make, NR_CONNACK);
1002 nr_make->condition = 0x00;
1007 nr_make->state = NR_STATE_3;
1008 sk_acceptq_added(sk);
1009 skb_queue_head(&sk->sk_receive_queue, skb);
1011 if (!sock_flag(sk, SOCK_DEAD))
1012 sk->sk_data_ready(sk, skb->len);
1016 nr_insert_socket(make);
1018 nr_start_heartbeat(make);
1019 nr_start_idletimer(make);
1024 static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1025 struct msghdr *msg, size_t len)
1027 struct sock *sk = sock->sk;
1028 struct nr_sock *nr = nr_sk(sk);
1029 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1031 struct sockaddr_ax25 sax;
1032 struct sk_buff *skb;
1033 unsigned char *asmptr;
1036 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1040 if (sock_flag(sk, SOCK_ZAPPED)) {
1041 err = -EADDRNOTAVAIL;
1045 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1046 send_sig(SIGPIPE, current, 0);
1051 if (nr->device == NULL) {
1057 if (msg->msg_namelen < sizeof(sax)) {
1062 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1066 if (sax.sax25_family != AF_NETROM) {
1071 if (sk->sk_state != TCP_ESTABLISHED) {
1075 sax.sax25_family = AF_NETROM;
1076 sax.sax25_call = nr->dest_addr;
1079 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1081 /* Build a packet */
1082 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1083 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1085 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1088 skb_reserve(skb, size - len);
1089 skb_reset_transport_header(skb);
1092 * Push down the NET/ROM header
1095 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1096 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1098 /* Build a NET/ROM Transport header */
1100 *asmptr++ = nr->your_index;
1101 *asmptr++ = nr->your_id;
1102 *asmptr++ = 0; /* To be filled in later */
1103 *asmptr++ = 0; /* Ditto */
1104 *asmptr++ = NR_INFO;
1105 SOCK_DEBUG(sk, "Built header.\n");
1108 * Put the data on the end
1112 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1114 /* User data follows immediately after the NET/ROM transport header */
1115 if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) {
1121 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1123 if (sk->sk_state != TCP_ESTABLISHED) {
1129 nr_output(sk, skb); /* Shove it onto the queue */
1137 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1138 struct msghdr *msg, size_t size, int flags)
1140 struct sock *sk = sock->sk;
1141 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1143 struct sk_buff *skb;
1147 * This works for seqpacket too. The receiver has ordered the queue for
1148 * us! We do one quick check first though
1152 if (sk->sk_state != TCP_ESTABLISHED) {
1157 /* Now we can treat all alike */
1158 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1163 skb_reset_transport_header(skb);
1166 if (copied > size) {
1168 msg->msg_flags |= MSG_TRUNC;
1171 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1174 sax->sax25_family = AF_NETROM;
1175 skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
1179 msg->msg_namelen = sizeof(*sax);
1181 skb_free_datagram(sk, skb);
1188 static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1190 struct sock *sk = sock->sk;
1191 void __user *argp = (void __user *)arg;
1199 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1203 return put_user(amount, (int __user *)argp);
1207 struct sk_buff *skb;
1211 /* These two are safe on a single CPU system as only user tasks fiddle here */
1212 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1215 return put_user(amount, (int __user *)argp);
1220 ret = sock_get_timestamp(sk, argp);
1226 ret = sock_get_timestampns(sk, argp);
1232 case SIOCGIFDSTADDR:
1233 case SIOCSIFDSTADDR:
1234 case SIOCGIFBRDADDR:
1235 case SIOCSIFBRDADDR:
1236 case SIOCGIFNETMASK:
1237 case SIOCSIFNETMASK:
1245 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1246 return nr_rt_ioctl(cmd, argp);
1249 return -ENOIOCTLCMD;
1255 #ifdef CONFIG_PROC_FS
1257 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1260 struct hlist_node *node;
1263 spin_lock_bh(&nr_list_lock);
1265 return SEQ_START_TOKEN;
1267 sk_for_each(s, node, &nr_list) {
1275 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1279 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1280 : sk_next((struct sock *)v);
1283 static void nr_info_stop(struct seq_file *seq, void *v)
1285 spin_unlock_bh(&nr_list_lock);
1288 static int nr_info_show(struct seq_file *seq, void *v)
1291 struct net_device *dev;
1293 const char *devname;
1296 if (v == SEQ_START_TOKEN)
1298 "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");
1305 if ((dev = nr->device) == NULL)
1308 devname = dev->name;
1310 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1311 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1313 "%-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",
1314 ax2asc(buf, &nr->source_addr),
1324 ax25_display_timer(&nr->t1timer) / HZ,
1326 ax25_display_timer(&nr->t2timer) / HZ,
1328 ax25_display_timer(&nr->t4timer) / HZ,
1330 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1331 nr->idle / (60 * HZ),
1335 atomic_read(&s->sk_wmem_alloc),
1336 atomic_read(&s->sk_rmem_alloc),
1337 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1344 static const struct seq_operations nr_info_seqops = {
1345 .start = nr_info_start,
1346 .next = nr_info_next,
1347 .stop = nr_info_stop,
1348 .show = nr_info_show,
1351 static int nr_info_open(struct inode *inode, struct file *file)
1353 return seq_open(file, &nr_info_seqops);
1356 static const struct file_operations nr_info_fops = {
1357 .owner = THIS_MODULE,
1358 .open = nr_info_open,
1360 .llseek = seq_lseek,
1361 .release = seq_release,
1363 #endif /* CONFIG_PROC_FS */
1365 static struct net_proto_family nr_family_ops = {
1366 .family = PF_NETROM,
1367 .create = nr_create,
1368 .owner = THIS_MODULE,
1371 static const struct proto_ops nr_proto_ops = {
1372 .family = PF_NETROM,
1373 .owner = THIS_MODULE,
1374 .release = nr_release,
1376 .connect = nr_connect,
1377 .socketpair = sock_no_socketpair,
1378 .accept = nr_accept,
1379 .getname = nr_getname,
1380 .poll = datagram_poll,
1382 .listen = nr_listen,
1383 .shutdown = sock_no_shutdown,
1384 .setsockopt = nr_setsockopt,
1385 .getsockopt = nr_getsockopt,
1386 .sendmsg = nr_sendmsg,
1387 .recvmsg = nr_recvmsg,
1388 .mmap = sock_no_mmap,
1389 .sendpage = sock_no_sendpage,
1392 static struct notifier_block nr_dev_notifier = {
1393 .notifier_call = nr_device_event,
1396 static struct net_device **dev_nr;
1398 static struct ax25_protocol nr_pid = {
1399 .pid = AX25_P_NETROM,
1400 .func = nr_route_frame
1403 static struct ax25_linkfail nr_linkfail_notifier = {
1404 .func = nr_link_failed,
1407 static int __init nr_proto_init(void)
1410 int rc = proto_register(&nr_proto, 0);
1415 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1416 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1420 dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1421 if (dev_nr == NULL) {
1422 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1426 for (i = 0; i < nr_ndevs; i++) {
1427 char name[IFNAMSIZ];
1428 struct net_device *dev;
1430 sprintf(name, "nr%d", i);
1431 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1433 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1438 if (register_netdev(dev)) {
1439 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1443 nr_set_lockdep_key(dev);
1447 if (sock_register(&nr_family_ops)) {
1448 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1452 register_netdevice_notifier(&nr_dev_notifier);
1454 ax25_register_pid(&nr_pid);
1455 ax25_linkfail_register(&nr_linkfail_notifier);
1457 #ifdef CONFIG_SYSCTL
1458 nr_register_sysctl();
1463 proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops);
1464 proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops);
1465 proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops);
1470 unregister_netdev(dev_nr[i]);
1471 free_netdev(dev_nr[i]);
1474 proto_unregister(&nr_proto);
1479 module_init(nr_proto_init);
1481 module_param(nr_ndevs, int, 0);
1482 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1484 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1485 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1486 MODULE_LICENSE("GPL");
1487 MODULE_ALIAS_NETPROTO(PF_NETROM);
1489 static void __exit nr_exit(void)
1493 proc_net_remove(&init_net, "nr");
1494 proc_net_remove(&init_net, "nr_neigh");
1495 proc_net_remove(&init_net, "nr_nodes");
1496 nr_loopback_clear();
1500 #ifdef CONFIG_SYSCTL
1501 nr_unregister_sysctl();
1504 ax25_linkfail_release(&nr_linkfail_notifier);
1505 ax25_protocol_release(AX25_P_NETROM);
1507 unregister_netdevice_notifier(&nr_dev_notifier);
1509 sock_unregister(PF_NETROM);
1511 for (i = 0; i < nr_ndevs; i++) {
1512 struct net_device *dev = dev_nr[i];
1514 unregister_netdev(dev);
1520 proto_unregister(&nr_proto);
1522 module_exit(nr_exit);