linux-imx

/*

 * lec.c: Lan Emulation driver

 *

 * Marko Kiiskila <mkiiskila@yahoo.com>

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__

​

#include <linux/slab.h>

#include <linux/kernel.h>

#include <linux/bitops.h>

#include <linux/capability.h>

​

/* We are ethernet device */

#include <linux/if_ether.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <net/sock.h>

#include <linux/skbuff.h>

#include <linux/ip.h>

#include <asm/byteorder.h>

#include <linux/uaccess.h>

#include <net/arp.h>

#include <net/dst.h>

#include <linux/proc_fs.h>

#include <linux/spinlock.h>

#include <linux/seq_file.h>

​

/* And atm device */

#include <linux/atmdev.h>

#include <linux/atmlec.h>

​

/* Proxy LEC knows about bridging */

#if IS_ENABLED(CONFIG_BRIDGE)

#include "../bridge/br_private.h"

​

static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };

#endif

​

/* Modular too */

#include <linux/module.h>

#include <linux/init.h>

​

/* Hardening for Spectre-v1 */

#include <linux/nospec.h>

​

#include "lec.h"

#include "lec_arpc.h"

#include "resources.h"

​

#define DUMP_PACKETS 0      /*

                 * 0 = None,

                 * 1 = 30 first bytes

                 * 2 = Whole packet

                 */

​

#define LEC_UNRES_QUE_LEN 8 /*

                 * number of tx packets to queue for a

                 * single destination while waiting for SVC

                 */

​

static int lec_open(struct net_device *dev);

static netdev_tx_t lec_start_xmit(struct sk_buff *skb,

                  struct net_device *dev);

static int lec_close(struct net_device *dev);

static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,

                      const unsigned char *mac_addr);

static int lec_arp_remove(struct lec_priv *priv,

              struct lec_arp_table *to_remove);

/* LANE2 functions */

static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,

                const u8 *tlvs, u32 sizeoftlvs);

static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,

             u8 **tlvs, u32 *sizeoftlvs);

static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,

                   const u8 *tlvs, u32 sizeoftlvs);

​

static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,

               unsigned long permanent);

static void lec_arp_check_empties(struct lec_priv *priv,

                  struct atm_vcc *vcc, struct sk_buff *skb);

static void lec_arp_destroy(struct lec_priv *priv);

static void lec_arp_init(struct lec_priv *priv);

static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,

                       const unsigned char *mac_to_find,

                       int is_rdesc,

                       struct lec_arp_table **ret_entry);

static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,

               const unsigned char *atm_addr,

               unsigned long remoteflag,

               unsigned int targetless_le_arp);

static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);