Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 225 insertions, 0 deletions

diff --git a/net/ax25/ax25_ip.c b/net/ax25/ax25_ip.c
new file mode 100644
index 000000000000..04d711344d55
--- /dev/null
+++ b/net/ax25/ax25_ip.c
@@ -0,0 +1,225 @@
+/*
+ * 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/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)
+{
+        unsigned char *buff;
+
+        /* they sometimes come back to us... */
+        if (type == ETH_P_AX25)
+                return 0;
+
+        /* header is an AX.25 UI frame from us to them */
+        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%2.2x\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_dev *ax25_dev;
+        ax25_route _route, *route = &_route;
+        ax25_cb *ax25;
+
+        dst = (ax25_address *)(bp + 1);
+        src = (ax25_address *)(bp + 8);
+
+        if (arp_find(bp + 1, skb))
+                return 1;
+
+        route = ax25_rt_find_route(route, dst, NULL);
+        dev      = route->dev;
+
+        if (dev == NULL)
+                dev = skb->dev;
+
+        if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) {
+                goto put;
+        }
+
+        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);
+                                goto put;
+                        }
+
+                        if (skb->sk != NULL)
+                                skb_set_owner_w(ourskb, skb->sk);
+
+                        kfree_skb(skb);
+                        /* dl9sau: bugfix
+                         * after kfree_skb(), dst and src which were pointer
+                         * to bp which is part of skb->data would not be valid
+                         * anymore hope that after skb_pull(ourskb, ..) our
+                         * dsc_c and src_c will not become invalid
+                         */
+                        bp  = ourskb->data;
+                        dst_c = *(ax25_address *)(bp + 1);
+                        src_c = *(ax25_address *)(bp + 8);
+
+                        skb_pull(ourskb, AX25_HEADER_LEN - 1);  /* Keep PID */
+                        ourskb->nh.raw = ourskb->data;
+
+                        ax25=ax25_send_frame(
+                            ourskb, 
+                            ax25_dev->values[AX25_VALUES_PACLEN], 
+                            &src_c,
+                            &dst_c, route->digipeat, dev);
+                        if (ax25) {
+                                ax25_cb_put(ax25);
+                        }
+                        goto put;
+                }
+        }
+
+        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);
+                        goto put;
+                }
+
+                skb = ourskb;
+        }
+
+        skb->dev      = dev;
+
+        ax25_queue_xmit(skb);
+
+put:
+        ax25_put_route(route);
+
+        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
+