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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 | /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for the Interfaces handler. * * Version: @(#)dev.h 1.0.10 08/12/93 * * Authors: Ross Biro, <bir7@leland.Stanford.Edu> * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * Corey Minyard <wf-rch!minyard@relay.EU.net> * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> * Alan Cox, <Alan.Cox@linux.org> * Bjorn Ekwall. <bj0rn@blox.se> * * 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. * * Moved to /usr/include/linux for NET3 */ #ifndef _LINUX_NETDEVICE_H #define _LINUX_NETDEVICE_H #include <linux/config.h> #include <linux/if.h> #include <linux/if_ether.h> #include <asm/atomic.h> /* * For future expansion when we will have different priorities. */ #define DEV_NUMBUFFS 3 /* Number of queues per device */ #define MAX_ADDR_LEN 7 /* Largest hardware address length */ /* * Compute the worst case header length according to the protocols * used. */ #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) #define LL_MAX_HEADER 32 #else #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) #define LL_MAX_HEADER 96 #else #define LL_MAX_HEADER 48 #endif #endif #if !defined(CONFIG_NET_IPIP) && \ !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) #define MAX_HEADER LL_MAX_HEADER #else #define MAX_HEADER (LL_MAX_HEADER + 48) #endif #define IS_MYADDR 1 /* address is (one of) our own */ #define IS_LOOPBACK 2 /* address is for LOOPBACK */ #define IS_BROADCAST 3 /* address is a valid broadcast */ #define IS_INVBCAST 4 /* Wrong netmask bcast not for us (unused)*/ #define IS_MULTICAST 5 /* Multicast IP address */ /* NOTE: move to ipv4_device.h */ #define IFF_IP_ADDR_OK 1 #define IFF_IP_MASK_OK 2 #define IFF_IP_BRD_OK 4 struct neighbour; /* * We tag multicasts with these structures. */ struct dev_mc_list { struct dev_mc_list *next; char dmi_addr[MAX_ADDR_LEN]; unsigned short dmi_addrlen; unsigned short dmi_users; }; struct hh_cache { struct hh_cache *hh_next; /* Next entry */ atomic_t hh_refcnt; /* number of users */ unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP */ char hh_uptodate; /* hh_data is valid */ /* cached hardware header; allow for machine alignment needs. */ unsigned long hh_data[16/sizeof(unsigned long)]; }; /* * Network device statistics. Akin to the 2.0 ether stats but * with byte counters. */ struct net_device_stats { unsigned long rx_packets; /* total packets received */ unsigned long tx_packets; /* total packets transmitted */ unsigned long rx_bytes; /* total bytes received */ unsigned long tx_bytes; /* total bytes transmitted */ unsigned long rx_errors; /* bad packets received */ unsigned long tx_errors; /* packet transmit problems */ unsigned long rx_dropped; /* no space in linux buffers */ unsigned long tx_dropped; /* no space available in linux */ unsigned long multicast; /* multicast packets received */ unsigned long collisions; /* detailed rx_errors: */ unsigned long rx_length_errors; unsigned long rx_over_errors; /* receiver ring buff overflow */ unsigned long rx_crc_errors; /* recved pkt with crc error */ unsigned long rx_frame_errors; /* recv'd frame alignment error */ unsigned long rx_fifo_errors; /* recv'r fifo overrun */ unsigned long rx_missed_errors; /* receiver missed packet */ /* detailed tx_errors */ unsigned long tx_aborted_errors; unsigned long tx_carrier_errors; unsigned long tx_fifo_errors; unsigned long tx_heartbeat_errors; unsigned long tx_window_errors; }; #ifdef __KERNEL__ #include <linux/skbuff.h> /* * The DEVICE structure. * Actually, this whole structure is a big mistake. It mixes I/O * data with strictly "high-level" data, and it has to know about * almost every data structure used in the INET module. * * FIXME: cleanup struct device such that network protocol info * moves out. */ struct device { /* * This is the first field of the "visible" part of this structure * (i.e. as seen by users in the "Space.c" file). It is the name * the interface. */ char *name; /* * I/O specific fields * FIXME: Merge these and struct ifmap into one */ unsigned long rmem_end; /* shmem "recv" end */ unsigned long rmem_start; /* shmem "recv" start */ unsigned long mem_end; /* shared mem end */ unsigned long mem_start; /* shared mem start */ unsigned long base_addr; /* device I/O address */ unsigned char irq; /* device IRQ number */ /* Low-level status flags. */ volatile unsigned char start, /* start an operation */ interrupt; /* interrupt arrived */ unsigned long tbusy; /* transmitter busy must be long for bitops */ struct device *next; /* The device initialization function. Called only once. */ int (*init)(struct device *dev); /* Interface index. Unique device identifier */ int ifindex; struct device *next_up; /* * Some hardware also needs these fields, but they are not * part of the usual set specified in Space.c. */ unsigned char if_port; /* Selectable AUI, TP,..*/ unsigned char dma; /* DMA channel */ struct net_device_stats* (*get_stats)(struct device *dev); struct iw_statistics* (*get_wireless_stats)(struct device *dev); /* * This marks the end of the "visible" part of the structure. All * fields hereafter are internal to the system, and may change at * will (read: may be cleaned up at will). */ /* These may be needed for future network-power-down code. */ unsigned long trans_start; /* Time (in jiffies) of last Tx */ unsigned long last_rx; /* Time of last Rx */ unsigned short flags; /* interface flags (a la BSD) */ unsigned short family; /* address family ID (AF_INET) */ unsigned short metric; /* routing metric (not used) */ unsigned short mtu; /* interface MTU value */ unsigned short type; /* interface hardware type */ unsigned short hard_header_len; /* hardware hdr length */ void *priv; /* pointer to private data */ /* Interface address info. */ unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ unsigned char pad; /* make dev_addr aligned to 8 bytes */ unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */ unsigned char addr_len; /* hardware address length */ unsigned long pa_addr; /* protocol address */ unsigned long pa_brdaddr; /* protocol broadcast addr */ unsigned long pa_dstaddr; /* protocol P-P other side addr */ unsigned long pa_mask; /* protocol netmask */ unsigned short pa_alen; /* protocol address length */ struct dev_mc_list *mc_list; /* Multicast mac addresses */ int mc_count; /* Number of installed mcasts */ struct ip_mc_list *ip_mc_list; /* IP multicast filter chain */ unsigned ip_flags; /* IP layer control flags */ __u32 tx_queue_len; /* Max frames per queue allowed */ /* For load balancing driver pair support */ unsigned long pkt_queue; /* Packets queued */ struct device *slave; /* Slave device */ struct net_alias_info *alias_info; /* main dev alias info */ struct net_alias *my_alias; /* alias devs */ /* Protocol specific pointers */ void *atalk_ptr; /* Appletalk link */ void *ip_ptr; /* Not used yet */ /* Pointer to the interface buffers. */ struct sk_buff_head buffs[DEV_NUMBUFFS]; /* Pointers to interface service routines. */ int (*open)(struct device *dev); int (*stop)(struct device *dev); int (*hard_start_xmit) (struct sk_buff *skb, struct device *dev); int (*hard_header) (struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned len); int (*rebuild_header)(struct sk_buff *skb); #define HAVE_MULTICAST void (*set_multicast_list)(struct device *dev); #define HAVE_SET_MAC_ADDR int (*set_mac_address)(struct device *dev, void *addr); #define HAVE_PRIVATE_IOCTL int (*do_ioctl)(struct device *dev, struct ifreq *ifr, int cmd); #define HAVE_SET_CONFIG int (*set_config)(struct device *dev, struct ifmap *map); #define HAVE_HEADER_CACHE int (*hard_header_cache)(struct dst_entry *dst, struct neighbour *neigh, struct hh_cache *hh); void (*header_cache_update)(struct hh_cache *hh, struct device *dev, unsigned char * haddr); #define HAVE_CHANGE_MTU int (*change_mtu)(struct device *dev, int new_mtu); }; struct packet_type { unsigned short type; /* This is really htons(ether_type). */ struct device *dev; /* NULL is wildcarded here */ int (*func) (struct sk_buff *, struct device *, struct packet_type *); void *data; /* Private to the packet type */ struct packet_type *next; }; #include <linux/interrupt.h> #include <linux/notifier.h> extern struct device loopback_dev; /* The loopback */ extern struct device *dev_base; /* All devices */ extern struct packet_type *ptype_base[16]; /* Hashed types */ /* NOTE: move to INET specific header; __ip_chk_addr is deprecated, do not use if it's possible. */ extern int __ip_chk_addr(unsigned long addr); extern struct device *ip_dev_find(unsigned long addr, char *name); /* This is the wrong place but it'll do for the moment */ extern void ip_mc_allhost(struct device *dev); extern int devinet_ioctl(unsigned int cmd, void *); extern struct device *dev_getbyhwaddr(unsigned short type, char *hwaddr); extern void dev_add_pack(struct packet_type *pt); extern void dev_remove_pack(struct packet_type *pt); extern struct device *dev_get(const char *name); extern struct device *dev_alloc(const char *name, int *err); extern int dev_alloc_name(struct device *dev, const char *name); extern int dev_open(struct device *dev); extern int dev_close(struct device *dev); extern int dev_queue_xmit(struct sk_buff *skb); extern void dev_loopback_xmit(struct sk_buff *skb); #define HAVE_NETIF_RX 1 extern void netif_rx(struct sk_buff *skb); extern void net_bh(void); extern void dev_tint(struct device *dev); extern int dev_get_info(char *buffer, char **start, off_t offset, int length, int dummy); extern int dev_ioctl(unsigned int cmd, void *); extern void dev_init(void); /* Locking protection for page faults during outputs to devices unloaded during the fault */ extern atomic_t dev_lockct; /* * These two don't currently need to be atomic * but they may do soon. Do it properly anyway. */ extern __inline__ void dev_lock_list(void) { atomic_inc(&dev_lockct); } extern __inline__ void dev_unlock_list(void) { atomic_dec(&dev_lockct); } /* * This almost never occurs, isn't in performance critical paths * and we can thus be relaxed about it. * * FIXME: What if this is being run as a real time process ?? * Linus: We need a way to force a yield here ? */ extern __inline__ void dev_lock_wait(void) { while(atomic_read(&dev_lockct)) schedule(); } /* * Buffer initialisation function. This used to appear in all the * drivers but is now an inline in case we ever want to change the * schemes used. */ extern __inline__ void dev_init_buffers(struct device *dev) { int i; for(i=0;i<DEV_NUMBUFFS;i++) { skb_queue_head_init(&dev->buffs[i]); } } /* These functions live elsewhere (drivers/net/net_init.c, but related) */ extern void ether_setup(struct device *dev); extern void fddi_setup(struct device *dev); extern void tr_setup(struct device *dev); extern void tr_freedev(struct device *dev); extern int ether_config(struct device *dev, struct ifmap *map); /* Support for loadable net-drivers */ extern int register_netdev(struct device *dev); extern void unregister_netdev(struct device *dev); extern int register_netdevice_notifier(struct notifier_block *nb); extern int unregister_netdevice_notifier(struct notifier_block *nb); extern int register_trdev(struct device *dev); extern void unregister_trdev(struct device *dev); /* Functions used for multicast support */ extern void dev_mc_upload(struct device *dev); extern void dev_mc_delete(struct device *dev, void *addr, int alen, int all); extern void dev_mc_add(struct device *dev, void *addr, int alen, int newonly); extern void dev_mc_discard(struct device *dev); /* Load a device via the kerneld */ extern void dev_load(const char *name); extern int dev_new_index(void); extern struct device * dev_get_by_index(int ifindex); #endif /* __KERNEL__ */ #endif /* _LINUX_DEV_H */ |