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;
78 * Socket removal during an interrupt is now safe.
80 static void nr_remove_socket(struct sock *sk)
82 spin_lock_bh(&nr_list_lock);
84 spin_unlock_bh(&nr_list_lock);
88 * Kill all bound sockets on a dropped device.
90 static void nr_kill_by_device(struct net_device *dev)
93 struct hlist_node *node;
95 spin_lock_bh(&nr_list_lock);
96 sk_for_each(s, node, &nr_list)
97 if (nr_sk(s)->device == dev)
98 nr_disconnect(s, ENETUNREACH);
99 spin_unlock_bh(&nr_list_lock);
103 * Handle device status changes.
105 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
107 struct net_device *dev = (struct net_device *)ptr;
109 if (dev->nd_net != &init_net)
112 if (event != NETDEV_DOWN)
115 nr_kill_by_device(dev);
116 nr_rt_device_down(dev);
122 * Add a socket to the bound sockets list.
124 static void nr_insert_socket(struct sock *sk)
126 spin_lock_bh(&nr_list_lock);
127 sk_add_node(sk, &nr_list);
128 spin_unlock_bh(&nr_list_lock);
132 * Find a socket that wants to accept the Connect Request we just
135 static struct sock *nr_find_listener(ax25_address *addr)
138 struct hlist_node *node;
140 spin_lock_bh(&nr_list_lock);
141 sk_for_each(s, node, &nr_list)
142 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
143 s->sk_state == TCP_LISTEN) {
149 spin_unlock_bh(&nr_list_lock);
154 * Find a connected NET/ROM socket given my circuit IDs.
156 static struct sock *nr_find_socket(unsigned char index, unsigned char id)
159 struct hlist_node *node;
161 spin_lock_bh(&nr_list_lock);
162 sk_for_each(s, node, &nr_list) {
163 struct nr_sock *nr = nr_sk(s);
165 if (nr->my_index == index && nr->my_id == id) {
172 spin_unlock_bh(&nr_list_lock);
177 * Find a connected NET/ROM socket given their circuit IDs.
179 static struct sock *nr_find_peer(unsigned char index, unsigned char id,
183 struct hlist_node *node;
185 spin_lock_bh(&nr_list_lock);
186 sk_for_each(s, node, &nr_list) {
187 struct nr_sock *nr = nr_sk(s);
189 if (nr->your_index == index && nr->your_id == id &&
190 !ax25cmp(&nr->dest_addr, dest)) {
197 spin_unlock_bh(&nr_list_lock);
202 * Find next free circuit ID.
204 static unsigned short nr_find_next_circuit(void)
206 unsigned short id = circuit;
214 if (i != 0 && j != 0) {
215 if ((sk=nr_find_socket(i, j)) == NULL)
229 void nr_destroy_socket(struct sock *);
232 * Handler for deferred kills.
234 static void nr_destroy_timer(unsigned long data)
236 struct sock *sk=(struct sock *)data;
239 nr_destroy_socket(sk);
245 * This is called from user mode and the timers. Thus it protects itself
246 * against interrupt users but doesn't worry about being called during
247 * work. Once it is removed from the queue no interrupt or bottom half
248 * will touch it and we are (fairly 8-) ) safe.
250 void nr_destroy_socket(struct sock *sk)
254 nr_remove_socket(sk);
256 nr_stop_heartbeat(sk);
260 nr_stop_idletimer(sk);
262 nr_clear_queues(sk); /* Flush the queues */
264 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
265 if (skb->sk != sk) { /* A pending connection */
266 /* Queue the unaccepted socket for death */
267 sock_set_flag(skb->sk, SOCK_DEAD);
268 nr_start_heartbeat(skb->sk);
269 nr_sk(skb->sk)->state = NR_STATE_0;
275 if (atomic_read(&sk->sk_wmem_alloc) ||
276 atomic_read(&sk->sk_rmem_alloc)) {
277 /* Defer: outstanding buffers */
278 sk->sk_timer.function = nr_destroy_timer;
279 sk->sk_timer.expires = jiffies + 2 * HZ;
280 add_timer(&sk->sk_timer);
286 * Handling for system calls applied via the various interfaces to a
287 * NET/ROM socket object.
290 static int nr_setsockopt(struct socket *sock, int level, int optname,
291 char __user *optval, int optlen)
293 struct sock *sk = sock->sk;
294 struct nr_sock *nr = nr_sk(sk);
297 if (level != SOL_NETROM)
300 if (optlen < sizeof(int))
303 if (get_user(opt, (int __user *)optval))
320 if (opt < 1 || opt > 31)
334 nr->idle = opt * 60 * HZ;
342 static int nr_getsockopt(struct socket *sock, int level, int optname,
343 char __user *optval, int __user *optlen)
345 struct sock *sk = sock->sk;
346 struct nr_sock *nr = nr_sk(sk);
350 if (level != SOL_NETROM)
353 if (get_user(len, optlen))
377 val = nr->idle / (60 * HZ);
384 len = min_t(unsigned int, len, sizeof(int));
386 if (put_user(len, optlen))
389 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
392 static int nr_listen(struct socket *sock, int backlog)
394 struct sock *sk = sock->sk;
397 if (sk->sk_state != TCP_LISTEN) {
398 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
399 sk->sk_max_ack_backlog = backlog;
400 sk->sk_state = TCP_LISTEN;
409 static struct proto nr_proto = {
411 .owner = THIS_MODULE,
412 .obj_size = sizeof(struct nr_sock),
415 static int nr_create(struct net *net, struct socket *sock, int protocol)
420 if (net != &init_net)
421 return -EAFNOSUPPORT;
423 if (sock->type != SOCK_SEQPACKET || protocol != 0)
424 return -ESOCKTNOSUPPORT;
426 if ((sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
431 sock_init_data(sock, sk);
433 sock->ops = &nr_proto_ops;
434 sk->sk_protocol = protocol;
436 skb_queue_head_init(&nr->ack_queue);
437 skb_queue_head_init(&nr->reseq_queue);
438 skb_queue_head_init(&nr->frag_queue);
443 msecs_to_jiffies(sysctl_netrom_transport_timeout);
445 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
447 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
449 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
451 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
452 nr->window = sysctl_netrom_transport_requested_window_size;
455 nr->state = NR_STATE_0;
460 static struct sock *nr_make_new(struct sock *osk)
463 struct nr_sock *nr, *onr;
465 if (osk->sk_type != SOCK_SEQPACKET)
468 if ((sk = sk_alloc(osk->sk_net, PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
473 sock_init_data(NULL, sk);
475 sk->sk_type = osk->sk_type;
476 sk->sk_socket = osk->sk_socket;
477 sk->sk_priority = osk->sk_priority;
478 sk->sk_protocol = osk->sk_protocol;
479 sk->sk_rcvbuf = osk->sk_rcvbuf;
480 sk->sk_sndbuf = osk->sk_sndbuf;
481 sk->sk_state = TCP_ESTABLISHED;
482 sk->sk_sleep = osk->sk_sleep;
483 sock_copy_flags(sk, osk);
485 skb_queue_head_init(&nr->ack_queue);
486 skb_queue_head_init(&nr->reseq_queue);
487 skb_queue_head_init(&nr->frag_queue);
497 nr->idle = onr->idle;
498 nr->window = onr->window;
500 nr->device = onr->device;
501 nr->bpqext = onr->bpqext;
506 static int nr_release(struct socket *sock)
508 struct sock *sk = sock->sk;
511 if (sk == NULL) return 0;
521 nr_disconnect(sk, 0);
522 nr_destroy_socket(sk);
528 nr_write_internal(sk, NR_DISCREQ);
529 nr_start_t1timer(sk);
532 nr_stop_idletimer(sk);
533 nr->state = NR_STATE_2;
534 sk->sk_state = TCP_CLOSE;
535 sk->sk_shutdown |= SEND_SHUTDOWN;
536 sk->sk_state_change(sk);
538 sock_set_flag(sk, SOCK_DESTROY);
539 sk->sk_socket = NULL;
543 sk->sk_socket = NULL;
554 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
556 struct sock *sk = sock->sk;
557 struct nr_sock *nr = nr_sk(sk);
558 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
559 struct net_device *dev;
560 ax25_uid_assoc *user;
561 ax25_address *source;
564 if (!sock_flag(sk, SOCK_ZAPPED)) {
568 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
572 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
576 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
580 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
581 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
583 return -EADDRNOTAVAIL;
587 * Only the super user can set an arbitrary user callsign.
589 if (addr->fsa_ax25.sax25_ndigis == 1) {
590 if (!capable(CAP_NET_BIND_SERVICE)) {
595 nr->user_addr = addr->fsa_digipeater[0];
596 nr->source_addr = addr->fsa_ax25.sax25_call;
598 source = &addr->fsa_ax25.sax25_call;
600 user = ax25_findbyuid(current->euid);
602 nr->user_addr = user->call;
605 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
610 nr->user_addr = *source;
613 nr->source_addr = *source;
617 nr_insert_socket(sk);
619 sock_reset_flag(sk, SOCK_ZAPPED);
622 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
626 static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
627 int addr_len, int flags)
629 struct sock *sk = sock->sk;
630 struct nr_sock *nr = nr_sk(sk);
631 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
632 ax25_address *source = NULL;
633 ax25_uid_assoc *user;
634 struct net_device *dev;
638 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
639 sock->state = SS_CONNECTED;
640 goto out_release; /* Connect completed during a ERESTARTSYS event */
643 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
644 sock->state = SS_UNCONNECTED;
649 if (sk->sk_state == TCP_ESTABLISHED) {
650 err = -EISCONN; /* No reconnect on a seqpacket socket */
654 sk->sk_state = TCP_CLOSE;
655 sock->state = SS_UNCONNECTED;
657 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
661 if (addr->sax25_family != AF_NETROM) {
665 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
666 sock_reset_flag(sk, SOCK_ZAPPED);
668 if ((dev = nr_dev_first()) == NULL) {
672 source = (ax25_address *)dev->dev_addr;
674 user = ax25_findbyuid(current->euid);
676 nr->user_addr = user->call;
679 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
684 nr->user_addr = *source;
687 nr->source_addr = *source;
691 nr_insert_socket(sk); /* Finish the bind */
694 nr->dest_addr = addr->sax25_call;
697 circuit = nr_find_next_circuit();
700 nr->my_index = circuit / 256;
701 nr->my_id = circuit % 256;
705 /* Move to connecting socket, start sending Connect Requests */
706 sock->state = SS_CONNECTING;
707 sk->sk_state = TCP_SYN_SENT;
709 nr_establish_data_link(sk);
711 nr->state = NR_STATE_1;
713 nr_start_heartbeat(sk);
716 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
722 * A Connect Ack with Choke or timeout or failed routing will go to
725 if (sk->sk_state == TCP_SYN_SENT) {
729 prepare_to_wait(sk->sk_sleep, &wait,
731 if (sk->sk_state != TCP_SYN_SENT)
733 if (!signal_pending(current)) {
742 finish_wait(sk->sk_sleep, &wait);
747 if (sk->sk_state != TCP_ESTABLISHED) {
748 sock->state = SS_UNCONNECTED;
749 err = sock_error(sk); /* Always set at this point */
753 sock->state = SS_CONNECTED;
761 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
769 if ((sk = sock->sk) == NULL)
773 if (sk->sk_type != SOCK_SEQPACKET) {
778 if (sk->sk_state != TCP_LISTEN) {
784 * The write queue this time is holding sockets ready to use
785 * hooked into the SABM we saved
788 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
789 skb = skb_dequeue(&sk->sk_receive_queue);
793 if (flags & O_NONBLOCK) {
797 if (!signal_pending(current)) {
806 finish_wait(sk->sk_sleep, &wait);
811 newsk->sk_socket = newsock;
812 newsk->sk_sleep = &newsock->wait;
814 /* Now attach up the new socket */
816 sk_acceptq_removed(sk);
825 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
826 int *uaddr_len, int peer)
828 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
829 struct sock *sk = sock->sk;
830 struct nr_sock *nr = nr_sk(sk);
834 if (sk->sk_state != TCP_ESTABLISHED) {
838 sax->fsa_ax25.sax25_family = AF_NETROM;
839 sax->fsa_ax25.sax25_ndigis = 1;
840 sax->fsa_ax25.sax25_call = nr->user_addr;
841 sax->fsa_digipeater[0] = nr->dest_addr;
842 *uaddr_len = sizeof(struct full_sockaddr_ax25);
844 sax->fsa_ax25.sax25_family = AF_NETROM;
845 sax->fsa_ax25.sax25_ndigis = 0;
846 sax->fsa_ax25.sax25_call = nr->source_addr;
847 *uaddr_len = sizeof(struct sockaddr_ax25);
854 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
858 struct nr_sock *nr_make;
859 ax25_address *src, *dest, *user;
860 unsigned short circuit_index, circuit_id;
861 unsigned short peer_circuit_index, peer_circuit_id;
862 unsigned short frametype, flags, window, timeout;
865 skb->sk = NULL; /* Initially we don't know who it's for */
868 * skb->data points to the netrom frame start
871 src = (ax25_address *)(skb->data + 0);
872 dest = (ax25_address *)(skb->data + 7);
874 circuit_index = skb->data[15];
875 circuit_id = skb->data[16];
876 peer_circuit_index = skb->data[17];
877 peer_circuit_id = skb->data[18];
878 frametype = skb->data[19] & 0x0F;
879 flags = skb->data[19] & 0xF0;
882 * Check for an incoming IP over NET/ROM frame.
884 if (frametype == NR_PROTOEXT &&
885 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
886 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
887 skb_reset_transport_header(skb);
889 return nr_rx_ip(skb, dev);
893 * Find an existing socket connection, based on circuit ID, if it's
894 * a Connect Request base it on their circuit ID.
896 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
897 * circuit that no longer exists at the other end ...
902 if (circuit_index == 0 && circuit_id == 0) {
903 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
904 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
906 if (frametype == NR_CONNREQ)
907 sk = nr_find_peer(circuit_index, circuit_id, src);
909 sk = nr_find_socket(circuit_index, circuit_id);
913 skb_reset_transport_header(skb);
915 if (frametype == NR_CONNACK && skb->len == 22)
916 nr_sk(sk)->bpqext = 1;
918 nr_sk(sk)->bpqext = 0;
920 ret = nr_process_rx_frame(sk, skb);
926 * Now it should be a CONNREQ.
928 if (frametype != NR_CONNREQ) {
930 * Here it would be nice to be able to send a reset but
931 * NET/ROM doesn't have one. We've tried to extend the protocol
932 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
933 * apparently kills BPQ boxes... :-(
934 * So now we try to follow the established behaviour of
935 * G8PZT's Xrouter which is sending packets with command type 7
936 * as an extension of the protocol.
938 if (sysctl_netrom_reset_circuit &&
939 (frametype != NR_RESET || flags != 0))
940 nr_transmit_reset(skb, 1);
945 sk = nr_find_listener(dest);
947 user = (ax25_address *)(skb->data + 21);
949 if (sk == NULL || sk_acceptq_is_full(sk) ||
950 (make = nr_make_new(sk)) == NULL) {
951 nr_transmit_refusal(skb, 0);
957 window = skb->data[20];
960 make->sk_state = TCP_ESTABLISHED;
962 /* Fill in his circuit details */
963 nr_make = nr_sk(make);
964 nr_make->source_addr = *dest;
965 nr_make->dest_addr = *src;
966 nr_make->user_addr = *user;
968 nr_make->your_index = circuit_index;
969 nr_make->your_id = circuit_id;
972 circuit = nr_find_next_circuit();
975 nr_make->my_index = circuit / 256;
976 nr_make->my_id = circuit % 256;
980 /* Window negotiation */
981 if (window < nr_make->window)
982 nr_make->window = window;
984 /* L4 timeout negotiation */
985 if (skb->len == 37) {
986 timeout = skb->data[36] * 256 + skb->data[35];
987 if (timeout * HZ < nr_make->t1)
988 nr_make->t1 = timeout * HZ;
994 nr_write_internal(make, NR_CONNACK);
996 nr_make->condition = 0x00;
1001 nr_make->state = NR_STATE_3;
1002 sk_acceptq_added(sk);
1003 skb_queue_head(&sk->sk_receive_queue, skb);
1005 if (!sock_flag(sk, SOCK_DEAD))
1006 sk->sk_data_ready(sk, skb->len);
1010 nr_insert_socket(make);
1012 nr_start_heartbeat(make);
1013 nr_start_idletimer(make);
1018 static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1019 struct msghdr *msg, size_t len)
1021 struct sock *sk = sock->sk;
1022 struct nr_sock *nr = nr_sk(sk);
1023 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1025 struct sockaddr_ax25 sax;
1026 struct sk_buff *skb;
1027 unsigned char *asmptr;
1030 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1034 if (sock_flag(sk, SOCK_ZAPPED)) {
1035 err = -EADDRNOTAVAIL;
1039 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1040 send_sig(SIGPIPE, current, 0);
1045 if (nr->device == NULL) {
1051 if (msg->msg_namelen < sizeof(sax)) {
1056 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1060 if (sax.sax25_family != AF_NETROM) {
1065 if (sk->sk_state != TCP_ESTABLISHED) {
1069 sax.sax25_family = AF_NETROM;
1070 sax.sax25_call = nr->dest_addr;
1073 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1075 /* Build a packet */
1076 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1077 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1079 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1082 skb_reserve(skb, size - len);
1083 skb_reset_transport_header(skb);
1086 * Push down the NET/ROM header
1089 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1090 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1092 /* Build a NET/ROM Transport header */
1094 *asmptr++ = nr->your_index;
1095 *asmptr++ = nr->your_id;
1096 *asmptr++ = 0; /* To be filled in later */
1097 *asmptr++ = 0; /* Ditto */
1098 *asmptr++ = NR_INFO;
1099 SOCK_DEBUG(sk, "Built header.\n");
1102 * Put the data on the end
1106 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1108 /* User data follows immediately after the NET/ROM transport header */
1109 if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) {
1115 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1117 if (sk->sk_state != TCP_ESTABLISHED) {
1123 nr_output(sk, skb); /* Shove it onto the queue */
1131 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1132 struct msghdr *msg, size_t size, int flags)
1134 struct sock *sk = sock->sk;
1135 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1137 struct sk_buff *skb;
1141 * This works for seqpacket too. The receiver has ordered the queue for
1142 * us! We do one quick check first though
1146 if (sk->sk_state != TCP_ESTABLISHED) {
1151 /* Now we can treat all alike */
1152 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1157 skb_reset_transport_header(skb);
1160 if (copied > size) {
1162 msg->msg_flags |= MSG_TRUNC;
1165 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1168 sax->sax25_family = AF_NETROM;
1169 skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
1173 msg->msg_namelen = sizeof(*sax);
1175 skb_free_datagram(sk, skb);
1182 static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1184 struct sock *sk = sock->sk;
1185 void __user *argp = (void __user *)arg;
1193 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1197 return put_user(amount, (int __user *)argp);
1201 struct sk_buff *skb;
1205 /* These two are safe on a single CPU system as only user tasks fiddle here */
1206 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1209 return put_user(amount, (int __user *)argp);
1214 ret = sock_get_timestamp(sk, argp);
1220 ret = sock_get_timestampns(sk, argp);
1226 case SIOCGIFDSTADDR:
1227 case SIOCSIFDSTADDR:
1228 case SIOCGIFBRDADDR:
1229 case SIOCSIFBRDADDR:
1230 case SIOCGIFNETMASK:
1231 case SIOCSIFNETMASK:
1239 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1240 return nr_rt_ioctl(cmd, argp);
1243 return -ENOIOCTLCMD;
1249 #ifdef CONFIG_PROC_FS
1251 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1254 struct hlist_node *node;
1257 spin_lock_bh(&nr_list_lock);
1259 return SEQ_START_TOKEN;
1261 sk_for_each(s, node, &nr_list) {
1269 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1273 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1274 : sk_next((struct sock *)v);
1277 static void nr_info_stop(struct seq_file *seq, void *v)
1279 spin_unlock_bh(&nr_list_lock);
1282 static int nr_info_show(struct seq_file *seq, void *v)
1285 struct net_device *dev;
1287 const char *devname;
1290 if (v == SEQ_START_TOKEN)
1292 "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");
1299 if ((dev = nr->device) == NULL)
1302 devname = dev->name;
1304 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1305 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1307 "%-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",
1308 ax2asc(buf, &nr->source_addr),
1318 ax25_display_timer(&nr->t1timer) / HZ,
1320 ax25_display_timer(&nr->t2timer) / HZ,
1322 ax25_display_timer(&nr->t4timer) / HZ,
1324 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1325 nr->idle / (60 * HZ),
1329 atomic_read(&s->sk_wmem_alloc),
1330 atomic_read(&s->sk_rmem_alloc),
1331 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1338 static const struct seq_operations nr_info_seqops = {
1339 .start = nr_info_start,
1340 .next = nr_info_next,
1341 .stop = nr_info_stop,
1342 .show = nr_info_show,
1345 static int nr_info_open(struct inode *inode, struct file *file)
1347 return seq_open(file, &nr_info_seqops);
1350 static const struct file_operations nr_info_fops = {
1351 .owner = THIS_MODULE,
1352 .open = nr_info_open,
1354 .llseek = seq_lseek,
1355 .release = seq_release,
1357 #endif /* CONFIG_PROC_FS */
1359 static struct net_proto_family nr_family_ops = {
1360 .family = PF_NETROM,
1361 .create = nr_create,
1362 .owner = THIS_MODULE,
1365 static const struct proto_ops nr_proto_ops = {
1366 .family = PF_NETROM,
1367 .owner = THIS_MODULE,
1368 .release = nr_release,
1370 .connect = nr_connect,
1371 .socketpair = sock_no_socketpair,
1372 .accept = nr_accept,
1373 .getname = nr_getname,
1374 .poll = datagram_poll,
1376 .listen = nr_listen,
1377 .shutdown = sock_no_shutdown,
1378 .setsockopt = nr_setsockopt,
1379 .getsockopt = nr_getsockopt,
1380 .sendmsg = nr_sendmsg,
1381 .recvmsg = nr_recvmsg,
1382 .mmap = sock_no_mmap,
1383 .sendpage = sock_no_sendpage,
1386 static struct notifier_block nr_dev_notifier = {
1387 .notifier_call = nr_device_event,
1390 static struct net_device **dev_nr;
1392 static struct ax25_protocol nr_pid = {
1393 .pid = AX25_P_NETROM,
1394 .func = nr_route_frame
1397 static struct ax25_linkfail nr_linkfail_notifier = {
1398 .func = nr_link_failed,
1401 static int __init nr_proto_init(void)
1404 int rc = proto_register(&nr_proto, 0);
1409 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1410 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1414 dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1415 if (dev_nr == NULL) {
1416 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1420 for (i = 0; i < nr_ndevs; i++) {
1421 char name[IFNAMSIZ];
1422 struct net_device *dev;
1424 sprintf(name, "nr%d", i);
1425 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1427 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1432 if (register_netdev(dev)) {
1433 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1437 lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key);
1441 if (sock_register(&nr_family_ops)) {
1442 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1446 register_netdevice_notifier(&nr_dev_notifier);
1448 ax25_register_pid(&nr_pid);
1449 ax25_linkfail_register(&nr_linkfail_notifier);
1451 #ifdef CONFIG_SYSCTL
1452 nr_register_sysctl();
1457 proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops);
1458 proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops);
1459 proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops);
1464 unregister_netdev(dev_nr[i]);
1465 free_netdev(dev_nr[i]);
1468 proto_unregister(&nr_proto);
1473 module_init(nr_proto_init);
1475 module_param(nr_ndevs, int, 0);
1476 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1478 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1479 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1480 MODULE_LICENSE("GPL");
1481 MODULE_ALIAS_NETPROTO(PF_NETROM);
1483 static void __exit nr_exit(void)
1487 proc_net_remove(&init_net, "nr");
1488 proc_net_remove(&init_net, "nr_neigh");
1489 proc_net_remove(&init_net, "nr_nodes");
1490 nr_loopback_clear();
1494 #ifdef CONFIG_SYSCTL
1495 nr_unregister_sysctl();
1498 ax25_linkfail_release(&nr_linkfail_notifier);
1499 ax25_protocol_release(AX25_P_NETROM);
1501 unregister_netdevice_notifier(&nr_dev_notifier);
1503 sock_unregister(PF_NETROM);
1505 for (i = 0; i < nr_ndevs; i++) {
1506 struct net_device *dev = dev_nr[i];
1508 unregister_netdev(dev);
1514 proto_unregister(&nr_proto);
1516 module_exit(nr_exit);