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- #include <linux/errno.h>
- #include <linux/types.h>
- #include <linux/socket.h>
- #include <linux/spinlock.h>
- #include <linux/in.h>
- #include <linux/kernel.h>
- #include <linux/jiffies.h>
- #include <linux/timer.h>
- #include <linux/string.h>
- #include <linux/sockios.h>
- #include <linux/net.h>
- #include <net/tcp_states.h>
- #include <net/ax25.h>
- #include <linux/inet.h>
- #include <linux/netdevice.h>
- #include <linux/skbuff.h>
- #include <net/sock.h>
- #include <asm/uaccess.h>
- #include <linux/fcntl.h>
- #include <linux/mm.h>
- #include <linux/interrupt.h>
- static void ax25_ds_timeout(unsigned long);
- void ax25_ds_setup_timer(ax25_dev *ax25_dev)
- {
- setup_timer(&ax25_dev->dama.slave_timer, ax25_ds_timeout,
- (unsigned long)ax25_dev);
- }
- void ax25_ds_del_timer(ax25_dev *ax25_dev)
- {
- if (ax25_dev)
- del_timer(&ax25_dev->dama.slave_timer);
- }
- void ax25_ds_set_timer(ax25_dev *ax25_dev)
- {
- if (ax25_dev == NULL)
- return;
- ax25_dev->dama.slave_timeout =
- msecs_to_jiffies(ax25_dev->values[AX25_VALUES_DS_TIMEOUT]) / 10;
- mod_timer(&ax25_dev->dama.slave_timer, jiffies + HZ);
- }
- static void ax25_ds_timeout(unsigned long arg)
- {
- ax25_dev *ax25_dev = (struct ax25_dev *) arg;
- ax25_cb *ax25;
- if (ax25_dev == NULL || !ax25_dev->dama.slave)
- return;
- if (!ax25_dev->dama.slave_timeout || --ax25_dev->dama.slave_timeout) {
- ax25_ds_set_timer(ax25_dev);
- return;
- }
- spin_lock(&ax25_list_lock);
- ax25_for_each(ax25, &ax25_list) {
- if (ax25->ax25_dev != ax25_dev || !(ax25->condition & AX25_COND_DAMA_MODE))
- continue;
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25_disconnect(ax25, ETIMEDOUT);
- }
- spin_unlock(&ax25_list_lock);
- ax25_dev_dama_off(ax25_dev);
- }
- void ax25_ds_heartbeat_expiry(ax25_cb *ax25)
- {
- struct sock *sk=ax25->sk;
- if (sk)
- bh_lock_sock(sk);
- switch (ax25->state) {
- case AX25_STATE_0:
- case AX25_STATE_2:
-
- if (!sk || sock_flag(sk, SOCK_DESTROY) ||
- (sk->sk_state == TCP_LISTEN &&
- sock_flag(sk, SOCK_DEAD))) {
- if (sk) {
- sock_hold(sk);
- ax25_destroy_socket(ax25);
- bh_unlock_sock(sk);
-
- sock_put(sk);
- } else
- ax25_destroy_socket(ax25);
- return;
- }
- break;
- case AX25_STATE_3:
-
- if (sk != NULL) {
- if (atomic_read(&sk->sk_rmem_alloc) <
- (sk->sk_rcvbuf >> 1) &&
- (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
- ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- break;
- }
- }
- break;
- }
- if (sk)
- bh_unlock_sock(sk);
- ax25_start_heartbeat(ax25);
- }
- void ax25_ds_t3timer_expiry(ax25_cb *ax25)
- {
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25_dama_off(ax25);
- ax25_disconnect(ax25, ETIMEDOUT);
- }
- void ax25_ds_idletimer_expiry(ax25_cb *ax25)
- {
- ax25_clear_queues(ax25);
- ax25->n2count = 0;
- ax25->state = AX25_STATE_2;
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- ax25_stop_t3timer(ax25);
- if (ax25->sk != NULL) {
- bh_lock_sock(ax25->sk);
- ax25->sk->sk_state = TCP_CLOSE;
- ax25->sk->sk_err = 0;
- ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
- if (!sock_flag(ax25->sk, SOCK_DEAD)) {
- ax25->sk->sk_state_change(ax25->sk);
- sock_set_flag(ax25->sk, SOCK_DEAD);
- }
- bh_unlock_sock(ax25->sk);
- }
- }
- void ax25_ds_t1_timeout(ax25_cb *ax25)
- {
- switch (ax25->state) {
- case AX25_STATE_1:
- if (ax25->n2count == ax25->n2) {
- if (ax25->modulus == AX25_MODULUS) {
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- ax25->n2count = 0;
- ax25_send_control(ax25, AX25_SABM, AX25_POLLOFF, AX25_COMMAND);
- }
- } else {
- ax25->n2count++;
- if (ax25->modulus == AX25_MODULUS)
- ax25_send_control(ax25, AX25_SABM, AX25_POLLOFF, AX25_COMMAND);
- else
- ax25_send_control(ax25, AX25_SABME, AX25_POLLOFF, AX25_COMMAND);
- }
- break;
- case AX25_STATE_2:
- if (ax25->n2count == ax25->n2) {
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- if (!sock_flag(ax25->sk, SOCK_DESTROY))
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->n2count++;
- }
- break;
- case AX25_STATE_3:
- if (ax25->n2count == ax25->n2) {
- ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->n2count++;
- }
- break;
- }
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- }
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