/* * This program 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. * * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) */ #include <linux/types.h> #include <linux/socket.h> #include <linux/timer.h> #include <net/ax25.h> #include <linux/skbuff.h> #include <net/rose.h> #include <linux/init.h> static struct sk_buff_head loopback_queue; static struct timer_list loopback_timer; static void rose_set_loopback_timer(void); void rose_loopback_init(void) { skb_queue_head_init(&loopback_queue); init_timer(&loopback_timer); } static int rose_loopback_running(void) { return timer_pending(&loopback_timer); } int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh) { struct sk_buff *skbn; skbn = skb_clone(skb, GFP_ATOMIC); kfree_skb(skb); if (skbn != NULL) { skb_queue_tail(&loopback_queue, skbn); if (!rose_loopback_running()) rose_set_loopback_timer(); } return 1; } static void rose_loopback_timer(unsigned long); static void rose_set_loopback_timer(void) { del_timer(&loopback_timer); loopback_timer.data = 0; loopback_timer.function = &rose_loopback_timer; loopback_timer.expires = jiffies + 10; add_timer(&loopback_timer); } static void rose_loopback_timer(unsigned long param) { struct sk_buff *skb; struct net_device *dev; rose_address *dest; struct sock *sk; unsigned short frametype; unsigned int lci_i, lci_o; while ((skb = skb_dequeue(&loopback_queue)) != NULL) { lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF); frametype = skb->data[2]; dest = (rose_address *)(skb->data + 4); lci_o = 0xFFF - lci_i; skb_reset_transport_header(skb); sk = rose_find_socket(lci_o, &rose_loopback_neigh); if (sk) { if (rose_process_rx_frame(sk, skb) == 0) kfree_skb(skb); continue; } if (frametype == ROSE_CALL_REQUEST) { if ((dev = rose_dev_get(dest)) != NULL) { if (rose_rx_call_request(skb, dev, &rose_loopback_neigh, lci_o) == 0) kfree_skb(skb); } else { kfree_skb(skb); } } else { kfree_skb(skb); } } } void __exit rose_loopback_clear(void) { struct sk_buff *skb; del_timer(&loopback_timer); while ((skb = skb_dequeue(&loopback_queue)) != NULL) { skb->sk = NULL; kfree_skb(skb); } }