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>
44 #include <linux/init.h>
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;
60 static unsigned short circuit = 0x101;
62 static HLIST_HEAD(nr_list);
63 static spinlock_t nr_list_lock = SPIN_LOCK_UNLOCKED;
65 static struct proto_ops nr_proto_ops;
66 void nr_init_timers(struct sock *sk);
68 static struct sock *nr_alloc_sock(void)
71 struct sock *sk = sk_alloc(PF_NETROM, GFP_ATOMIC, 1, NULL);
76 nr = sk->sk_protinfo = kmalloc(sizeof(*nr), GFP_ATOMIC);
80 memset(nr, 0x00, sizeof(*nr));
91 * Socket removal during an interrupt is now safe.
93 static void nr_remove_socket(struct sock *sk)
95 spin_lock_bh(&nr_list_lock);
97 spin_unlock_bh(&nr_list_lock);
101 * Kill all bound sockets on a dropped device.
103 static void nr_kill_by_device(struct net_device *dev)
106 struct hlist_node *node;
108 spin_lock_bh(&nr_list_lock);
109 sk_for_each(s, node, &nr_list)
110 if (nr_sk(s)->device == dev)
111 nr_disconnect(s, ENETUNREACH);
112 spin_unlock_bh(&nr_list_lock);
116 * Handle device status changes.
118 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
120 struct net_device *dev = (struct net_device *)ptr;
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 nr_cb *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 nr_cb *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 nr_cb *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 nr_cb *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 int nr_create(struct socket *sock, int protocol)
424 if (sock->type != SOCK_SEQPACKET || protocol != 0)
425 return -ESOCKTNOSUPPORT;
427 if ((sk = nr_alloc_sock()) == NULL)
432 sock_init_data(sock, sk);
433 sk_set_owner(sk, THIS_MODULE);
435 sock->ops = &nr_proto_ops;
436 sk->sk_protocol = protocol;
438 skb_queue_head_init(&nr->ack_queue);
439 skb_queue_head_init(&nr->reseq_queue);
440 skb_queue_head_init(&nr->frag_queue);
444 nr->t1 = sysctl_netrom_transport_timeout;
445 nr->t2 = sysctl_netrom_transport_acknowledge_delay;
446 nr->n2 = sysctl_netrom_transport_maximum_tries;
447 nr->t4 = sysctl_netrom_transport_busy_delay;
448 nr->idle = sysctl_netrom_transport_no_activity_timeout;
449 nr->window = sysctl_netrom_transport_requested_window_size;
452 nr->state = NR_STATE_0;
457 static struct sock *nr_make_new(struct sock *osk)
462 if (osk->sk_type != SOCK_SEQPACKET)
465 if ((sk = nr_alloc_sock()) == NULL)
470 sock_init_data(NULL, sk);
471 sk_set_owner(sk, THIS_MODULE);
473 sk->sk_type = osk->sk_type;
474 sk->sk_socket = osk->sk_socket;
475 sk->sk_priority = osk->sk_priority;
476 sk->sk_protocol = osk->sk_protocol;
477 sk->sk_rcvbuf = osk->sk_rcvbuf;
478 sk->sk_sndbuf = osk->sk_sndbuf;
479 sk->sk_debug = osk->sk_debug;
480 sk->sk_state = TCP_ESTABLISHED;
481 sk->sk_sleep = osk->sk_sleep;
482 sk->sk_zapped = osk->sk_zapped;
484 skb_queue_head_init(&nr->ack_queue);
485 skb_queue_head_init(&nr->reseq_queue);
486 skb_queue_head_init(&nr->frag_queue);
496 nr->idle = onr->idle;
497 nr->window = onr->window;
499 nr->device = onr->device;
500 nr->bpqext = onr->bpqext;
505 static int nr_release(struct socket *sock)
507 struct sock *sk = sock->sk;
510 if (sk == NULL) return 0;
520 nr_disconnect(sk, 0);
521 nr_destroy_socket(sk);
527 nr_write_internal(sk, NR_DISCREQ);
528 nr_start_t1timer(sk);
531 nr_stop_idletimer(sk);
532 nr->state = NR_STATE_2;
533 sk->sk_state = TCP_CLOSE;
534 sk->sk_shutdown |= SEND_SHUTDOWN;
535 sk->sk_state_change(sk);
537 sock_set_flag(sk, SOCK_DESTROY);
538 sk->sk_socket = NULL;
542 sk->sk_socket = NULL;
553 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
555 struct sock *sk = sock->sk;
556 nr_cb *nr = nr_sk(sk);
557 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
558 struct net_device *dev;
559 ax25_address *user, *source;
562 if (!sk->sk_zapped) {
566 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
570 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
574 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
578 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
579 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
581 return -EADDRNOTAVAIL;
585 * Only the super user can set an arbitrary user callsign.
587 if (addr->fsa_ax25.sax25_ndigis == 1) {
588 if (!capable(CAP_NET_BIND_SERVICE)) {
593 nr->user_addr = addr->fsa_digipeater[0];
594 nr->source_addr = addr->fsa_ax25.sax25_call;
596 source = &addr->fsa_ax25.sax25_call;
598 if ((user = ax25_findbyuid(current->euid)) == NULL) {
599 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
607 nr->user_addr = *user;
608 nr->source_addr = *source;
612 nr_insert_socket(sk);
617 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
621 static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
622 int addr_len, int flags)
624 struct sock *sk = sock->sk;
625 nr_cb *nr = nr_sk(sk);
626 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
627 ax25_address *user, *source = NULL;
628 struct net_device *dev;
631 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
632 sock->state = SS_CONNECTED;
634 return 0; /* Connect completed during a ERESTARTSYS event */
637 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
638 sock->state = SS_UNCONNECTED;
640 return -ECONNREFUSED;
643 if (sk->sk_state == TCP_ESTABLISHED) {
645 return -EISCONN; /* No reconnect on a seqpacket socket */
648 sk->sk_state = TCP_CLOSE;
649 sock->state = SS_UNCONNECTED;
651 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
655 if (addr->sax25_family != AF_NETROM) {
659 if (sk->sk_zapped) { /* Must bind first - autobinding in this may or may not work */
662 if ((dev = nr_dev_first()) == NULL) {
666 source = (ax25_address *)dev->dev_addr;
668 if ((user = ax25_findbyuid(current->euid)) == NULL) {
669 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
677 nr->user_addr = *user;
678 nr->source_addr = *source;
682 nr_insert_socket(sk); /* Finish the bind */
685 nr->dest_addr = addr->sax25_call;
688 circuit = nr_find_next_circuit();
691 nr->my_index = circuit / 256;
692 nr->my_id = circuit % 256;
696 /* Move to connecting socket, start sending Connect Requests */
697 sock->state = SS_CONNECTING;
698 sk->sk_state = TCP_SYN_SENT;
700 nr_establish_data_link(sk);
702 nr->state = NR_STATE_1;
704 nr_start_heartbeat(sk);
707 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
713 * A Connect Ack with Choke or timeout or failed routing will go to
716 if (sk->sk_state == TCP_SYN_SENT) {
717 struct task_struct *tsk = current;
718 DECLARE_WAITQUEUE(wait, tsk);
720 add_wait_queue(sk->sk_sleep, &wait);
722 set_current_state(TASK_INTERRUPTIBLE);
723 if (sk->sk_state != TCP_SYN_SENT)
726 if (!signal_pending(tsk)) {
731 current->state = TASK_RUNNING;
732 remove_wait_queue(sk->sk_sleep, &wait);
735 current->state = TASK_RUNNING;
736 remove_wait_queue(sk->sk_sleep, &wait);
739 if (sk->sk_state != TCP_ESTABLISHED) {
740 sock->state = SS_UNCONNECTED;
742 return sock_error(sk); /* Always set at this point */
745 sock->state = SS_CONNECTED;
751 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
753 struct task_struct *tsk = current;
754 DECLARE_WAITQUEUE(wait, tsk);
760 if ((sk = sock->sk) == NULL)
764 if (sk->sk_type != SOCK_SEQPACKET) {
769 if (sk->sk_state != TCP_LISTEN) {
775 * The write queue this time is holding sockets ready to use
776 * hooked into the SABM we saved
778 add_wait_queue(sk->sk_sleep, &wait);
780 skb = skb_dequeue(&sk->sk_receive_queue);
784 current->state = TASK_INTERRUPTIBLE;
786 if (flags & O_NONBLOCK) {
787 current->state = TASK_RUNNING;
788 remove_wait_queue(sk->sk_sleep, &wait);
791 if (!signal_pending(tsk)) {
796 current->state = TASK_RUNNING;
797 remove_wait_queue(sk->sk_sleep, &wait);
800 current->state = TASK_RUNNING;
801 remove_wait_queue(sk->sk_sleep, &wait);
804 newsk->sk_pair = NULL;
805 newsk->sk_socket = newsock;
806 newsk->sk_sleep = &newsock->wait;
808 /* Now attach up the new socket */
810 sk->sk_ack_backlog--;
818 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
819 int *uaddr_len, int peer)
821 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
822 struct sock *sk = sock->sk;
823 nr_cb *nr = nr_sk(sk);
827 if (sk->sk_state != TCP_ESTABLISHED) {
831 sax->fsa_ax25.sax25_family = AF_NETROM;
832 sax->fsa_ax25.sax25_ndigis = 1;
833 sax->fsa_ax25.sax25_call = nr->user_addr;
834 sax->fsa_digipeater[0] = nr->dest_addr;
835 *uaddr_len = sizeof(struct full_sockaddr_ax25);
837 sax->fsa_ax25.sax25_family = AF_NETROM;
838 sax->fsa_ax25.sax25_ndigis = 0;
839 sax->fsa_ax25.sax25_call = nr->source_addr;
840 *uaddr_len = sizeof(struct sockaddr_ax25);
847 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
852 ax25_address *src, *dest, *user;
853 unsigned short circuit_index, circuit_id;
854 unsigned short peer_circuit_index, peer_circuit_id;
855 unsigned short frametype, flags, window, timeout;
858 skb->sk = NULL; /* Initially we don't know who it's for */
861 * skb->data points to the netrom frame start
864 src = (ax25_address *)(skb->data + 0);
865 dest = (ax25_address *)(skb->data + 7);
867 circuit_index = skb->data[15];
868 circuit_id = skb->data[16];
869 peer_circuit_index = skb->data[17];
870 peer_circuit_id = skb->data[18];
871 frametype = skb->data[19] & 0x0F;
872 flags = skb->data[19] & 0xF0;
876 * Check for an incoming IP over NET/ROM frame.
878 if (frametype == NR_PROTOEXT && circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
879 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
880 skb->h.raw = skb->data;
882 return nr_rx_ip(skb, dev);
887 * Find an existing socket connection, based on circuit ID, if it's
888 * a Connect Request base it on their circuit ID.
890 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
891 * circuit that no longer exists at the other end ...
896 if (circuit_index == 0 && circuit_id == 0) {
897 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
898 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
900 if (frametype == NR_CONNREQ)
901 sk = nr_find_peer(circuit_index, circuit_id, src);
903 sk = nr_find_socket(circuit_index, circuit_id);
907 skb->h.raw = skb->data;
909 if (frametype == NR_CONNACK && skb->len == 22)
910 nr_sk(sk)->bpqext = 1;
912 nr_sk(sk)->bpqext = 0;
914 ret = nr_process_rx_frame(sk, skb);
920 * Now it should be a CONNREQ.
922 if (frametype != NR_CONNREQ) {
924 * Here it would be nice to be able to send a reset but
925 * NET/ROM doesn't have one. The following hack would
926 * have been a way to extend the protocol but apparently
927 * it kills BPQ boxes... :-(
931 * Never reply to a CONNACK/CHOKE.
933 if (frametype != NR_CONNACK || flags != NR_CHOKE_FLAG)
934 nr_transmit_refusal(skb, 1);
939 sk = nr_find_listener(dest);
941 user = (ax25_address *)(skb->data + 21);
943 if (!sk || sk->sk_ack_backlog == sk->sk_max_ack_backlog ||
944 (make = nr_make_new(sk)) == NULL) {
945 nr_transmit_refusal(skb, 0);
951 window = skb->data[20];
954 make->sk_state = TCP_ESTABLISHED;
956 /* Fill in his circuit details */
957 nr_make = nr_sk(make);
958 nr_make->source_addr = *dest;
959 nr_make->dest_addr = *src;
960 nr_make->user_addr = *user;
962 nr_make->your_index = circuit_index;
963 nr_make->your_id = circuit_id;
966 circuit = nr_find_next_circuit();
969 nr_make->my_index = circuit / 256;
970 nr_make->my_id = circuit % 256;
974 /* Window negotiation */
975 if (window < nr_make->window)
976 nr_make->window = window;
978 /* L4 timeout negotiation */
979 if (skb->len == 37) {
980 timeout = skb->data[36] * 256 + skb->data[35];
981 if (timeout * HZ < nr_make->t1)
982 nr_make->t1 = timeout * HZ;
988 nr_write_internal(make, NR_CONNACK);
990 nr_make->condition = 0x00;
995 nr_make->state = NR_STATE_3;
996 sk->sk_ack_backlog++;
999 nr_insert_socket(make);
1001 skb_queue_head(&sk->sk_receive_queue, skb);
1003 nr_start_heartbeat(make);
1004 nr_start_idletimer(make);
1006 if (!sock_flag(sk, SOCK_DEAD))
1007 sk->sk_data_ready(sk, skb->len);
1013 static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1014 struct msghdr *msg, size_t len)
1016 struct sock *sk = sock->sk;
1017 nr_cb *nr = nr_sk(sk);
1018 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1020 struct sockaddr_ax25 sax;
1021 struct sk_buff *skb;
1022 unsigned char *asmptr;
1025 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1029 if (sk->sk_zapped) {
1030 err = -EADDRNOTAVAIL;
1034 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1035 send_sig(SIGPIPE, current, 0);
1040 if (nr->device == NULL) {
1046 if (msg->msg_namelen < sizeof(sax)) {
1051 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1055 if (sax.sax25_family != AF_NETROM) {
1060 if (sk->sk_state != TCP_ESTABLISHED) {
1064 sax.sax25_family = AF_NETROM;
1065 sax.sax25_call = nr->dest_addr;
1068 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1070 /* Build a packet */
1071 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1072 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1074 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1077 skb_reserve(skb, size - len);
1080 * Push down the NET/ROM header
1083 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1084 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1086 /* Build a NET/ROM Transport header */
1088 *asmptr++ = nr->your_index;
1089 *asmptr++ = nr->your_id;
1090 *asmptr++ = 0; /* To be filled in later */
1091 *asmptr++ = 0; /* Ditto */
1092 *asmptr++ = NR_INFO;
1093 SOCK_DEBUG(sk, "Built header.\n");
1096 * Put the data on the end
1099 skb->h.raw = skb_put(skb, len);
1101 asmptr = skb->h.raw;
1102 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1104 /* User data follows immediately after the NET/ROM transport header */
1105 if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
1111 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1113 if (sk->sk_state != TCP_ESTABLISHED) {
1119 nr_output(sk, skb); /* Shove it onto the queue */
1127 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1128 struct msghdr *msg, size_t size, int flags)
1130 struct sock *sk = sock->sk;
1131 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1133 struct sk_buff *skb;
1137 * This works for seqpacket too. The receiver has ordered the queue for
1138 * us! We do one quick check first though
1142 if (sk->sk_state != TCP_ESTABLISHED) {
1147 /* Now we can treat all alike */
1148 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1153 skb->h.raw = skb->data;
1156 if (copied > size) {
1158 msg->msg_flags |= MSG_TRUNC;
1161 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1164 sax->sax25_family = AF_NETROM;
1165 memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN);
1168 msg->msg_namelen = sizeof(*sax);
1170 skb_free_datagram(sk, skb);
1177 static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1179 struct sock *sk = sock->sk;
1180 void __user *argp = (void __user *)arg;
1187 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1191 return put_user(amount, (int __user *)argp);
1195 struct sk_buff *skb;
1197 /* These two are safe on a single CPU system as only user tasks fiddle here */
1198 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1201 return put_user(amount, (int __user *)argp);
1207 ret = sock_get_timestamp(sk, argp);
1213 case SIOCGIFDSTADDR:
1214 case SIOCSIFDSTADDR:
1215 case SIOCGIFBRDADDR:
1216 case SIOCSIFBRDADDR:
1217 case SIOCGIFNETMASK:
1218 case SIOCSIFNETMASK:
1228 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1229 return nr_rt_ioctl(cmd, argp);
1233 return dev_ioctl(cmd, argp);
1240 #ifdef CONFIG_PROC_FS
1242 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1245 struct hlist_node *node;
1248 spin_lock_bh(&nr_list_lock);
1250 return SEQ_START_TOKEN;
1252 sk_for_each(s, node, &nr_list) {
1260 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1264 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1265 : sk_next((struct sock *)v);
1268 static void nr_info_stop(struct seq_file *seq, void *v)
1270 spin_unlock_bh(&nr_list_lock);
1273 static int nr_info_show(struct seq_file *seq, void *v)
1276 struct net_device *dev;
1278 const char *devname;
1280 if (v == SEQ_START_TOKEN)
1282 "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");
1289 if ((dev = nr->device) == NULL)
1292 devname = dev->name;
1294 seq_printf(seq, "%-9s ", ax2asc(&nr->user_addr));
1295 seq_printf(seq, "%-9s ", ax2asc(&nr->dest_addr));
1297 "%-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",
1298 ax2asc(&nr->source_addr),
1308 ax25_display_timer(&nr->t1timer) / HZ,
1310 ax25_display_timer(&nr->t2timer) / HZ,
1312 ax25_display_timer(&nr->t4timer) / HZ,
1314 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1315 nr->idle / (60 * HZ),
1319 atomic_read(&s->sk_wmem_alloc),
1320 atomic_read(&s->sk_rmem_alloc),
1321 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1328 static struct seq_operations nr_info_seqops = {
1329 .start = nr_info_start,
1330 .next = nr_info_next,
1331 .stop = nr_info_stop,
1332 .show = nr_info_show,
1335 static int nr_info_open(struct inode *inode, struct file *file)
1337 return seq_open(file, &nr_info_seqops);
1340 static struct file_operations nr_info_fops = {
1341 .owner = THIS_MODULE,
1342 .open = nr_info_open,
1344 .llseek = seq_lseek,
1345 .release = seq_release,
1347 #endif /* CONFIG_PROC_FS */
1349 static struct net_proto_family nr_family_ops = {
1350 .family = PF_NETROM,
1351 .create = nr_create,
1352 .owner = THIS_MODULE,
1355 static struct proto_ops nr_proto_ops = {
1356 .family = PF_NETROM,
1357 .owner = THIS_MODULE,
1358 .release = nr_release,
1360 .connect = nr_connect,
1361 .socketpair = sock_no_socketpair,
1362 .accept = nr_accept,
1363 .getname = nr_getname,
1364 .poll = datagram_poll,
1366 .listen = nr_listen,
1367 .shutdown = sock_no_shutdown,
1368 .setsockopt = nr_setsockopt,
1369 .getsockopt = nr_getsockopt,
1370 .sendmsg = nr_sendmsg,
1371 .recvmsg = nr_recvmsg,
1372 .mmap = sock_no_mmap,
1373 .sendpage = sock_no_sendpage,
1376 static struct notifier_block nr_dev_notifier = {
1377 .notifier_call = nr_device_event,
1380 static struct net_device **dev_nr;
1382 static char banner[] __initdata = KERN_INFO "G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n";
1384 static int __init nr_proto_init(void)
1388 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1389 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1393 dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1394 if (dev_nr == NULL) {
1395 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1399 memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *));
1401 for (i = 0; i < nr_ndevs; i++) {
1402 char name[IFNAMSIZ];
1403 struct net_device *dev;
1405 sprintf(name, "nr%d", i);
1406 dev = alloc_netdev(sizeof(struct net_device_stats), name,
1409 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1414 if (register_netdev(dev)) {
1415 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1422 if (sock_register(&nr_family_ops)) {
1423 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1427 register_netdevice_notifier(&nr_dev_notifier);
1430 ax25_protocol_register(AX25_P_NETROM, nr_route_frame);
1431 ax25_linkfail_register(nr_link_failed);
1433 #ifdef CONFIG_SYSCTL
1434 nr_register_sysctl();
1439 proc_net_fops_create("nr", S_IRUGO, &nr_info_fops);
1440 proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops);
1441 proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops);
1446 unregister_netdev(dev_nr[i]);
1447 free_netdev(dev_nr[i]);
1453 module_init(nr_proto_init);
1455 module_param(nr_ndevs, int, 0);
1456 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1458 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1459 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1460 MODULE_LICENSE("GPL");
1461 MODULE_ALIAS_NETPROTO(PF_NETROM);
1463 static void __exit nr_exit(void)
1467 proc_net_remove("nr");
1468 proc_net_remove("nr_neigh");
1469 proc_net_remove("nr_nodes");
1470 nr_loopback_clear();
1474 #ifdef CONFIG_SYSCTL
1475 nr_unregister_sysctl();
1478 ax25_linkfail_release(nr_link_failed);
1479 ax25_protocol_release(AX25_P_NETROM);
1481 unregister_netdevice_notifier(&nr_dev_notifier);
1483 sock_unregister(PF_NETROM);
1485 for (i = 0; i < nr_ndevs; i++) {
1486 struct net_device *dev = dev_nr[i];
1488 unregister_netdev(dev);
1495 module_exit(nr_exit);