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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [net/] [netrom/] [nr_timer.c] - Rev 1772
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/* * NET/ROM release 006 * * This code REQUIRES 1.2.1 or higher/ NET3.029 * * This module: * This module is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * History * NET/ROM 001 Jonathan(G4KLX) Cloned from ax25_timer.c */ #include <linux/config.h> #if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE) #include <linux/errno.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/timer.h> #include <linux/string.h> #include <linux/sockios.h> #include <linux/net.h> #include <net/ax25.h> #include <linux/inet.h> #include <linux/netdevice.h> #include <linux/skbuff.h> #include <net/sock.h> #include <asm/segment.h> #include <asm/system.h> #include <linux/fcntl.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <net/netrom.h> static void nr_timer(unsigned long); /* * Linux set timer */ void nr_set_timer(struct sock *sk) { unsigned long flags; save_flags(flags); cli(); del_timer(&sk->timer); restore_flags(flags); sk->timer.data = (unsigned long)sk; sk->timer.function = &nr_timer; sk->timer.expires = jiffies+10; add_timer(&sk->timer); } /* * NET/ROM TIMER * * This routine is called every 100ms. Decrement timer by this * amount - if expired then process the event. */ static void nr_timer(unsigned long param) { struct sock *sk = (struct sock *)param; switch (sk->protinfo.nr->state) { case NR_STATE_0: /* Magic here: If we listen() and a new link dies before it is accepted() it isn't 'dead' so doesn't get removed. */ if (sk->destroy || (sk->state == TCP_LISTEN && sk->dead)) { del_timer(&sk->timer); nr_destroy_socket(sk); return; } break; case NR_STATE_3: /* * Check for the state of the receive buffer. */ if (sk->rmem_alloc < (sk->rcvbuf / 2) && (sk->protinfo.nr->condition & NR_COND_OWN_RX_BUSY)) { sk->protinfo.nr->condition &= ~NR_COND_OWN_RX_BUSY; sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING; sk->protinfo.nr->vl = sk->protinfo.nr->vr; nr_write_internal(sk, NR_INFOACK); break; } /* * Check for frames to transmit. */ nr_kick(sk); break; default: break; } if (sk->protinfo.nr->t2timer > 0 && --sk->protinfo.nr->t2timer == 0) { if (sk->protinfo.nr->state == NR_STATE_3) { if (sk->protinfo.nr->condition & NR_COND_ACK_PENDING) { sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING; nr_enquiry_response(sk); } } } if (sk->protinfo.nr->t4timer > 0 && --sk->protinfo.nr->t4timer == 0) { sk->protinfo.nr->condition &= ~NR_COND_PEER_RX_BUSY; } if (sk->protinfo.nr->t1timer == 0 || --sk->protinfo.nr->t1timer > 0) { nr_set_timer(sk); return; } switch (sk->protinfo.nr->state) { case NR_STATE_1: if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) { nr_clear_queues(sk); sk->protinfo.nr->state = NR_STATE_0; sk->state = TCP_CLOSE; sk->err = ETIMEDOUT; sk->shutdown |= SEND_SHUTDOWN; if (!sk->dead) sk->state_change(sk); sk->dead = 1; } else { sk->protinfo.nr->n2count++; nr_write_internal(sk, NR_CONNREQ); } break; case NR_STATE_2: if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) { nr_clear_queues(sk); sk->protinfo.nr->state = NR_STATE_0; sk->state = TCP_CLOSE; sk->err = ETIMEDOUT; sk->shutdown |= SEND_SHUTDOWN; if (!sk->dead) sk->state_change(sk); sk->dead = 1; } else { sk->protinfo.nr->n2count++; nr_write_internal(sk, NR_DISCREQ); } break; case NR_STATE_3: if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) { nr_clear_queues(sk); sk->protinfo.nr->state = NR_STATE_0; sk->state = TCP_CLOSE; sk->err = ETIMEDOUT; sk->shutdown |= SEND_SHUTDOWN; if (!sk->dead) sk->state_change(sk); sk->dead = 1; } else { sk->protinfo.nr->n2count++; nr_requeue_frames(sk); } break; } sk->protinfo.nr->t1timer = sk->protinfo.nr->t1; nr_set_timer(sk); } #endif
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