diff options
Diffstat (limited to 'net/ax25/ax25_ip.c')
| -rw-r--r-- | net/ax25/ax25_ip.c | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/net/ax25/ax25_ip.c b/net/ax25/ax25_ip.c deleted file mode 100644 index e6dcda83d..000000000 --- a/net/ax25/ax25_ip.c +++ /dev/null @@ -1,211 +0,0 @@ -/* - * AX.25 release 037 - * - * This code REQUIRES 2.1.15 or higher/ NET3.038 - * - * 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 - * AX.25 036 Jonathan(G4KLX) Split from af_ax25.c. - */ - -#include <linux/config.h> -#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/if_arp.h> -#include <linux/skbuff.h> -#include <net/sock.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <linux/fcntl.h> -#include <linux/termios.h> /* For TIOCINQ/OUTQ */ -#include <linux/mm.h> -#include <linux/interrupt.h> -#include <linux/notifier.h> -#include <linux/proc_fs.h> -#include <linux/stat.h> -#include <linux/netfilter.h> -#include <linux/sysctl.h> -#include <net/ip.h> -#include <net/arp.h> - -/* - * IP over AX.25 encapsulation. - */ - -/* - * Shove an AX.25 UI header on an IP packet and handle ARP - */ - -#ifdef CONFIG_INET - -int ax25_encapsulate(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) -{ - /* header is an AX.25 UI frame from us to them */ - unsigned char *buff = skb_push(skb, AX25_HEADER_LEN); - - *buff++ = 0x00; /* KISS DATA */ - - if (daddr != NULL) - memcpy(buff, daddr, dev->addr_len); /* Address specified */ - - buff[6] &= ~AX25_CBIT; - buff[6] &= ~AX25_EBIT; - buff[6] |= AX25_SSSID_SPARE; - buff += AX25_ADDR_LEN; - - if (saddr != NULL) - memcpy(buff, saddr, dev->addr_len); - else - memcpy(buff, dev->dev_addr, dev->addr_len); - - buff[6] &= ~AX25_CBIT; - buff[6] |= AX25_EBIT; - buff[6] |= AX25_SSSID_SPARE; - buff += AX25_ADDR_LEN; - - *buff++ = AX25_UI; /* UI */ - - /* Append a suitable AX.25 PID */ - switch (type) { - case ETH_P_IP: - *buff++ = AX25_P_IP; - break; - case ETH_P_ARP: - *buff++ = AX25_P_ARP; - break; - default: - printk(KERN_ERR "AX.25: ax25_encapsulate - wrong protocol type 0x%x2.2\n", type); - *buff++ = 0; - break; - } - - if (daddr != NULL) - return AX25_HEADER_LEN; - - return -AX25_HEADER_LEN; /* Unfinished header */ -} - -int ax25_rebuild_header(struct sk_buff *skb) -{ - struct sk_buff *ourskb; - unsigned char *bp = skb->data; - struct net_device *dev; - ax25_address *src, *dst; - ax25_route *route; - ax25_dev *ax25_dev; - - dst = (ax25_address *)(bp + 1); - src = (ax25_address *)(bp + 8); - - if (arp_find(bp + 1, skb)) - return 1; - - route = ax25_rt_find_route(dst, NULL); - dev = route->dev; - - if (dev == NULL) - dev = skb->dev; - - if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) - return 1; - - if (bp[16] == AX25_P_IP) { - if (route->ip_mode == 'V' || (route->ip_mode == ' ' && ax25_dev->values[AX25_VALUES_IPDEFMODE])) { - /* - * We copy the buffer and release the original thereby - * keeping it straight - * - * Note: we report 1 back so the caller will - * not feed the frame direct to the physical device - * We don't want that to happen. (It won't be upset - * as we have pulled the frame from the queue by - * freeing it). - * - * NB: TCP modifies buffers that are still - * on a device queue, thus we use skb_copy() - * instead of using skb_clone() unless this - * gets fixed. - */ - - ax25_address src_c; - ax25_address dst_c; - - if ((ourskb = skb_copy(skb, GFP_ATOMIC)) == NULL) { - kfree_skb(skb); - return 1; - } - - if (skb->sk != NULL) - skb_set_owner_w(ourskb, skb->sk); - - kfree_skb(skb); - - src_c = *src; - dst_c = *dst; - - skb_pull(ourskb, AX25_HEADER_LEN - 1); /* Keep PID */ - skb->nh.raw = skb->data; - - ax25_send_frame(ourskb, ax25_dev->values[AX25_VALUES_PACLEN], &src_c, -&dst_c, route->digipeat, dev); - - return 1; - } - } - - bp[7] &= ~AX25_CBIT; - bp[7] &= ~AX25_EBIT; - bp[7] |= AX25_SSSID_SPARE; - - bp[14] &= ~AX25_CBIT; - bp[14] |= AX25_EBIT; - bp[14] |= AX25_SSSID_SPARE; - - skb_pull(skb, AX25_KISS_HEADER_LEN); - - if (route->digipeat != NULL) { - if ((ourskb = ax25_rt_build_path(skb, src, dst, route->digipeat)) == NULL) { - kfree_skb(skb); - return 1; - } - - skb = ourskb; - } - - skb->dev = dev; - - ax25_queue_xmit(skb); - - return 1; -} - -#else /* INET */ - -int ax25_encapsulate(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) -{ - return -AX25_HEADER_LEN; -} - -int ax25_rebuild_header(struct sk_buff *skb) -{ - return 1; -} - -#endif - |