1 files changed, 104 insertions, 0 deletions

diff --git a/arch/um/os-Linux/drivers/tuntap_kern.c b/arch/um/os-Linux/drivers/tuntap_kern.c
new file mode 100644
index 000000000000..4202b9ebad4c
--- /dev/null
+++ b/arch/um/os-Linux/drivers/tuntap_kern.c
@@ -0,0 +1,104 @@
+/* 
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/stddef.h"
+#include "linux/netdevice.h"
+#include "linux/etherdevice.h"
+#include "linux/skbuff.h"
+#include "linux/init.h"
+#include "asm/errno.h"
+#include "net_kern.h"
+#include "net_user.h"
+#include "tuntap.h"
+
+struct tuntap_init {
+        char *dev_name;
+        char *gate_addr;
+};
+
+static void tuntap_init(struct net_device *dev, void *data)
+{
+        struct uml_net_private *pri;
+        struct tuntap_data *tpri;
+        struct tuntap_init *init = data;
+
+        pri = dev->priv;
+        tpri = (struct tuntap_data *) pri->user;
+        tpri->dev_name = init->dev_name;
+        tpri->fixed_config = (init->dev_name != NULL);
+        tpri->gate_addr = init->gate_addr;
+        tpri->fd = -1;
+        tpri->dev = dev;
+
+        printk("TUN/TAP backend - ");
+        if (tpri->gate_addr != NULL)
+                printk("IP = %s", tpri->gate_addr);
+        printk("\n");
+}
+
+static int tuntap_read(int fd, struct sk_buff **skb, 
+                       struct uml_net_private *lp)
+{
+        *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
+        if(*skb == NULL) return(-ENOMEM);
+        return(net_read(fd, (*skb)->mac.raw, 
+                        (*skb)->dev->mtu + ETH_HEADER_OTHER));
+}
+
+static int tuntap_write(int fd, struct sk_buff **skb, 
+                        struct uml_net_private *lp)
+{
+        return(net_write(fd, (*skb)->data, (*skb)->len));
+}
+
+struct net_kern_info tuntap_kern_info = {
+        .init                   = tuntap_init,
+        .protocol               = eth_protocol,
+        .read                   = tuntap_read,
+        .write                  = tuntap_write,
+};
+
+int tuntap_setup(char *str, char **mac_out, void *data)
+{
+        struct tuntap_init *init = data;
+
+        *init = ((struct tuntap_init)
+                { .dev_name     = NULL,
+                  .gate_addr    = NULL });
+        if(tap_setup_common(str, "tuntap", &init->dev_name, mac_out,
+                            &init->gate_addr))
+                return(0);
+
+        return(1);
+}
+
+static struct transport tuntap_transport = {
+        .list           = LIST_HEAD_INIT(tuntap_transport.list),
+        .name           = "tuntap",
+        .setup          = tuntap_setup,
+        .user           = &tuntap_user_info,
+        .kern           = &tuntap_kern_info,
+        .private_size   = sizeof(struct tuntap_data),
+        .setup_size     = sizeof(struct tuntap_init),
+};
+
+static int register_tuntap(void)
+{
+        register_transport(&tuntap_transport);
+        return(1);
+}
+
+__initcall(register_tuntap);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */