root/include/linux/netdevice.h

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INCLUDED FROM


   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions for the Interfaces handler.
   7  *
   8  * Version:     @(#)dev.h       1.0.10  08/12/93
   9  *
  10  * Authors:     Ross Biro, <bir7@leland.Stanford.Edu>
  11  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *              Corey Minyard <wf-rch!minyard@relay.EU.net>
  13  *              Donald J. Becker, <becker@super.org>
  14  *              Alan Cox, <A.Cox@swansea.ac.uk>
  15  *              Bjorn Ekwall. <bj0rn@blox.se>
  16  *
  17  *              This program is free software; you can redistribute it and/or
  18  *              modify it under the terms of the GNU General Public License
  19  *              as published by the Free Software Foundation; either version
  20  *              2 of the License, or (at your option) any later version.
  21  *
  22  *              Moved to /usr/include/linux for NET3
  23  */
  24 #ifndef _LINUX_NETDEVICE_H
  25 #define _LINUX_NETDEVICE_H
  26 
  27 #include <linux/if.h>
  28 #include <linux/if_ether.h>
  29 #include <linux/skbuff.h>
  30 
  31 /* for future expansion when we will have different priorities. */
  32 #define DEV_NUMBUFFS    3
  33 #define MAX_ADDR_LEN    7
  34 #define MAX_HEADER      18
  35 
  36 #define IS_MYADDR       1               /* address is (one of) our own  */
  37 #define IS_LOOPBACK     2               /* address is for LOOPBACK      */
  38 #define IS_BROADCAST    3               /* address is a valid broadcast */
  39 #define IS_INVBCAST     4               /* Wrong netmask bcast not for us (unused)*/
  40 #define IS_MULTICAST    5               /* Multicast IP address */
  41 
  42 /*
  43  * The DEVICE structure.
  44  * Actually, this whole structure is a big mistake.  It mixes I/O
  45  * data with strictly "high-level" data, and it has to know about
  46  * almost every data structure used in the INET module.  
  47  */
  48 struct device 
  49 {
  50 
  51   /*
  52    * This is the first field of the "visible" part of this structure
  53    * (i.e. as seen by users in the "Space.c" file).  It is the name
  54    * the interface.
  55    */
  56   char                    *name;
  57 
  58   /* I/O specific fields - FIXME: Merge these and struct ifmap into one */
  59   unsigned long           rmem_end;             /* shmem "recv" end     */
  60   unsigned long           rmem_start;           /* shmem "recv" start   */
  61   unsigned long           mem_end;              /* sahared mem end      */
  62   unsigned long           mem_start;            /* shared mem start     */
  63   unsigned short          base_addr;            /* device I/O address   */
  64   unsigned char           irq;                  /* device IRQ number    */
  65 
  66   /* Low-level status flags. */
  67   volatile unsigned char  start,                /* start an operation   */
  68                           tbusy,                /* transmitter busy     */
  69                           interrupt;            /* interrupt arrived    */
  70 
  71   struct device           *next;
  72 
  73   /* The device initialization function. Called only once. */
  74   int                     (*init)(struct device *dev);
  75 
  76   /* Some hardware also needs these fields, but they are not part of the
  77      usual set specified in Space.c. */
  78   unsigned char           if_port;              /* Selectable AUI, TP,..*/
  79   unsigned char           dma;                  /* DMA channel          */
  80 
  81   struct enet_statistics* (*get_stats)(struct device *dev);
  82 
  83   /*
  84    * This marks the end of the "visible" part of the structure. All
  85    * fields hereafter are internal to the system, and may change at
  86    * will (read: may be cleaned up at will).
  87    */
  88 
  89   /* These may be needed for future network-power-down code. */
  90   unsigned long           trans_start;  /* Time (in jiffies) of last Tx */
  91   unsigned long           last_rx;      /* Time of last Rx              */
  92 
  93   unsigned short          flags;        /* interface flags (a la BSD)   */
  94   unsigned short          family;       /* address family ID (AF_INET)  */
  95   unsigned short          metric;       /* routing metric (not used)    */
  96   unsigned short          mtu;          /* interface MTU value          */
  97   unsigned short          type;         /* interface hardware type      */
  98   unsigned short          hard_header_len;      /* hardware hdr length  */
  99   void                    *priv;        /* pointer to private data      */
 100 
 101   /* Interface address info. */
 102   unsigned char           broadcast[MAX_ADDR_LEN];      /* hw bcast add */
 103   unsigned char           dev_addr[MAX_ADDR_LEN];       /* hw address   */
 104   unsigned char           addr_len;     /* hardware address length      */
 105   unsigned long           pa_addr;      /* protocol address             */
 106   unsigned long           pa_brdaddr;   /* protocol broadcast addr      */
 107   unsigned long           pa_dstaddr;   /* protocol P-P other side addr */
 108   unsigned long           pa_mask;      /* protocol netmask             */
 109   unsigned short          pa_alen;      /* protocol address length      */
 110   
 111   /* For load balancing driver pair support */
 112   
 113   unsigned long            pkt_queue;   /* Packets queued */
 114   struct device           *slave;       /* Slave device */
 115   
 116 
 117   /* Pointer to the interface buffers. */
 118   struct sk_buff_head     buffs[DEV_NUMBUFFS];
 119 
 120   /* Pointers to interface service routines. */
 121   int                     (*open)(struct device *dev);
 122   int                     (*stop)(struct device *dev);
 123   int                     (*hard_start_xmit) (struct sk_buff *skb,
 124                                               struct device *dev);
 125   int                     (*hard_header) (unsigned char *buff,
 126                                           struct device *dev,
 127                                           unsigned short type,
 128                                           void *daddr,
 129                                           void *saddr,
 130                                           unsigned len,
 131                                           struct sk_buff *skb);
 132   int                     (*rebuild_header)(void *eth, struct device *dev,
 133                                 unsigned long raddr, struct sk_buff *skb);
 134   unsigned short          (*type_trans) (struct sk_buff *skb,
 135                                          struct device *dev);
 136 #define HAVE_MULTICAST                   
 137   void                    (*set_multicast_list)(struct device *dev,
 138                                          int num_addrs, void *addrs);
 139 #define HAVE_SET_MAC_ADDR                
 140   int                     (*set_mac_address)(struct device *dev, void *addr);
 141 #define HAVE_PRIVATE_IOCTL
 142   int                     (*do_ioctl)(struct device *dev, struct ifreq *ifr, int cmd);
 143 #define HAVE_SET_CONFIG
 144   int                     (*set_config)(struct device *dev, struct ifmap *map);
 145   
 146 };
 147 
 148 
 149 struct packet_type {
 150   unsigned short        type;   /* This is really htons(ether_type). */
 151   unsigned short        copy:1;
 152   int                   (*func) (struct sk_buff *, struct device *,
 153                                  struct packet_type *);
 154   void                  *data;
 155   struct packet_type    *next;
 156 };
 157 
 158 
 159 #ifdef __KERNEL__
 160 
 161 /* Used by dev_rint */
 162 #define IN_SKBUFF       1
 163 
 164 extern volatile char in_bh;
 165 
 166 extern struct device    *dev_base;
 167 extern struct packet_type *ptype_base;
 168 
 169 
 170 extern int              ip_addr_match(unsigned long addr1, unsigned long addr2);
 171 extern int              ip_chk_addr(unsigned long addr);
 172 extern struct device    *ip_dev_check(unsigned long daddr);
 173 extern unsigned long    ip_my_addr(void);
 174 extern unsigned long    ip_get_mask(unsigned long addr);
 175 
 176 extern void             dev_add_pack(struct packet_type *pt);
 177 extern void             dev_remove_pack(struct packet_type *pt);
 178 extern struct device    *dev_get(char *name);
 179 extern int              dev_open(struct device *dev);
 180 extern int              dev_close(struct device *dev);
 181 extern void             dev_queue_xmit(struct sk_buff *skb, struct device *dev,
 182                                        int pri);
 183 #define HAVE_NETIF_RX 1
 184 extern void             netif_rx(struct sk_buff *skb);
 185 /* The old interface to netif_rx(). */
 186 extern int              dev_rint(unsigned char *buff, long len, int flags,
 187                                  struct device * dev);
 188 extern void             dev_transmit(void);
 189 extern int              in_net_bh(void);
 190 extern void             net_bh(void *tmp);
 191 extern void             dev_tint(struct device *dev);
 192 extern int              dev_get_info(char *buffer, char **start, off_t offset, int length);
 193 extern int              dev_ioctl(unsigned int cmd, void *);
 194 
 195 extern void             dev_init(void);
 196 
 197 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
 198 
 199 extern void             ether_setup(struct device *dev);
 200 extern int              ether_config(struct device *dev, struct ifmap *map);
 201 /* Support for loadable net-drivers */
 202 extern int              register_netdev(struct device *dev);
 203 extern void             unregister_netdev(struct device *dev);
 204 
 205 #endif /* __KERNEL__ */
 206 
 207 #endif  /* _LINUX_DEV_H */

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