1 files changed, 109 insertions, 0 deletions

diff --git a/arch/um/drivers/slip_kern.c b/arch/um/drivers/slip_kern.c
new file mode 100644
index 000000000000..0886eedba213
--- /dev/null
+++ b/arch/um/drivers/slip_kern.c
@@ -0,0 +1,109 @@
+#include "linux/config.h"
+#include "linux/kernel.h"
+#include "linux/stddef.h"
+#include "linux/init.h"
+#include "linux/netdevice.h"
+#include "linux/if_arp.h"
+#include "net_kern.h"
+#include "net_user.h"
+#include "kern.h"
+#include "slip.h"
+
+struct slip_init {
+        char *gate_addr;
+};
+
+void slip_init(struct net_device *dev, void *data)
+{
+        struct uml_net_private *private;
+        struct slip_data *spri;
+        struct slip_init *init = data;
+
+        private = dev->priv;
+        spri = (struct slip_data *) private->user;
+        *spri = ((struct slip_data)
+                { .name         = { '\0' },
+                  .addr         = NULL,
+                  .gate_addr    = init->gate_addr,
+                  .slave        = -1,
+                  .ibuf         = { '\0' },
+                  .obuf         = { '\0' },
+                  .pos          = 0,
+                  .esc          = 0,
+                  .dev          = dev });
+
+        dev->init = NULL;
+        dev->hard_header_len = 0;
+        dev->addr_len = 4;
+        dev->type = ARPHRD_ETHER;
+        dev->tx_queue_len = 256;
+        dev->flags = IFF_NOARP;
+        printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
+}
+
+static unsigned short slip_protocol(struct sk_buff *skbuff)
+{
+        return(htons(ETH_P_IP));
+}
+
+static int slip_read(int fd, struct sk_buff **skb, 
+                       struct uml_net_private *lp)
+{
+        return(slip_user_read(fd, (*skb)->mac.raw, (*skb)->dev->mtu, 
+                              (struct slip_data *) &lp->user));
+}
+
+static int slip_write(int fd, struct sk_buff **skb,
+                      struct uml_net_private *lp)
+{
+        return(slip_user_write(fd, (*skb)->data, (*skb)->len, 
+                               (struct slip_data *) &lp->user));
+}
+
+struct net_kern_info slip_kern_info = {
+        .init                   = slip_init,
+        .protocol               = slip_protocol,
+        .read                   = slip_read,
+        .write                  = slip_write,
+};
+
+static int slip_setup(char *str, char **mac_out, void *data)
+{
+        struct slip_init *init = data;
+
+        *init = ((struct slip_init)
+                { .gate_addr            = NULL });
+
+        if(str[0] != '\0') 
+                init->gate_addr = str;
+        return(1);
+}
+
+static struct transport slip_transport = {
+        .list           = LIST_HEAD_INIT(slip_transport.list),
+        .name           = "slip",
+        .setup          = slip_setup,
+        .user           = &slip_user_info,
+        .kern           = &slip_kern_info,
+        .private_size   = sizeof(struct slip_data),
+        .setup_size     = sizeof(struct slip_init),
+};
+
+static int register_slip(void)
+{
+        register_transport(&slip_transport);
+        return(1);
+}
+
+__initcall(register_slip);
+
+/*
+ * 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:
+ */