projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 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. | |
| 6 | * | |
| 7 | * Copyright (C) Jonathan Naylor G4KLX ([email protected]) | |
| 8 | */ | |
| 9 | #include <linux/types.h> | |
| 10 | #include <linux/socket.h> | |
| 11 | #include <linux/timer.h> | |
| 12 | #include <net/ax25.h> | |
| 13 | #include <linux/skbuff.h> | |
| 14 | #include <net/rose.h> | |
| 15 | #include <linux/init.h> | |
| 16 | ||
| 17 | static struct sk_buff_head loopback_queue; | |
| 18 | static struct timer_list loopback_timer; | |
| 19 | ||
| 20 | static void rose_set_loopback_timer(void); | |
| 21 | ||
| 22 | void rose_loopback_init(void) | |
| 23 | { | |
| 24 | skb_queue_head_init(&loopback_queue); | |
| 25 | ||
| 26 | init_timer(&loopback_timer); | |
| 27 | } | |
| 28 | ||
| 29 | static int rose_loopback_running(void) | |
| 30 | { | |
| 31 | return timer_pending(&loopback_timer); | |
| 32 | } | |
| 33 | ||
| 34 | int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh) | |
| 35 | { | |
| 36 | struct sk_buff *skbn; | |
| 37 | ||
| 38 | skbn = skb_clone(skb, GFP_ATOMIC); | |
| 39 | ||
| 40 | kfree_skb(skb); | |
| 41 | ||
| 42 | if (skbn != NULL) { | |
| 43 | skb_queue_tail(&loopback_queue, skbn); | |
| 44 | ||
| 45 | if (!rose_loopback_running()) | |
| 46 | rose_set_loopback_timer(); | |
| 47 | } | |
| 48 | ||
| 49 | return 1; | |
| 50 | } | |
| 51 | ||
| 52 | static void rose_loopback_timer(unsigned long); | |
| 53 | ||
| 54 | static void rose_set_loopback_timer(void) | |
| 55 | { | |
| 56 | del_timer(&loopback_timer); | |
| 57 | ||
| 58 | loopback_timer.data = 0; | |
| 59 | loopback_timer.function = &rose_loopback_timer; | |
| 60 | loopback_timer.expires = jiffies + 10; | |
| 61 | ||
| 62 | add_timer(&loopback_timer); | |
| 63 | } | |
| 64 | ||
| 65 | static void rose_loopback_timer(unsigned long param) | |
| 66 | { | |
| 67 | struct sk_buff *skb; | |
| 68 | struct net_device *dev; | |
| 69 | rose_address *dest; | |
| 70 | struct sock *sk; | |
| 71 | unsigned short frametype; | |
| 72 | unsigned int lci_i, lci_o; | |
| 73 | ||
| 74 | while ((skb = skb_dequeue(&loopback_queue)) != NULL) { | |
| 75 | lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF); | |
| 76 | frametype = skb->data[2]; | |
| 77 | dest = (rose_address *)(skb->data + 4); | |
| 1f731b63 | 78 | lci_o = ROSE_DEFAULT_MAXVC + 1 - lci_i; |
| 1da177e4 | 79 | |
| badff6d0 | 80 | skb_reset_transport_header(skb); |
| 1da177e4 | 81 | |
| 891e6a93 | 82 | sk = rose_find_socket(lci_o, rose_loopback_neigh); |
| a3d38402 | 83 | if (sk) { |
| 1da177e4 LT |
84 | if (rose_process_rx_frame(sk, skb) == 0) |
| 85 | kfree_skb(skb); | |
| 86 | continue; | |
| 87 | } | |
| 88 | ||
| 89 | if (frametype == ROSE_CALL_REQUEST) { | |
| 90 | if ((dev = rose_dev_get(dest)) != NULL) { | |
| 891e6a93 | 91 | if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) |
| 1da177e4 LT |
92 | kfree_skb(skb); |
| 93 | } else { | |
| 94 | kfree_skb(skb); | |
| 95 | } | |
| 96 | } else { | |
| 97 | kfree_skb(skb); | |
| 98 | } | |
| 99 | } | |
| 100 | } | |
| 101 | ||
| 102 | void __exit rose_loopback_clear(void) | |
| 103 | { | |
| 104 | struct sk_buff *skb; | |
| 105 | ||
| 106 | del_timer(&loopback_timer); | |
| 107 | ||
| 108 | while ((skb = skb_dequeue(&loopback_queue)) != NULL) { | |
| 109 | skb->sk = NULL; | |
| 110 | kfree_skb(skb); | |
| 111 | } | |
| 112 | } |