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*/
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/config.h>
28 #include <linux/if.h>
29 #include <linux/if_ether.h>
30 #include <linux/skbuff.h>
31
32 /* for future expansion when we will have different priorities. */
33 #define DEV_NUMBUFFS 3
34 #define MAX_ADDR_LEN 7
35 #ifndef CONFIG_AX25
36 #ifndef CONFIG_TR
37 #ifndef CONFIG_NET_IPIP
38 #define MAX_HEADER 32 /* We really need about 18 worst case .. so 32 is aligned */
39 #else
40 #define MAX_HEADER 80 /* We need to allow for having tunnel headers */
41 #endif /* IPIP */
42 #else
43 #define MAX_HEADER 48 /* Token Ring header needs 40 bytes ... 48 is aligned */
44 #endif /* TR */
45 #else
46 #define MAX_HEADER 96 /* AX.25 + NetROM */
47 #endif /* AX25 */
48
49 #define IS_MYADDR 1 /* address is (one of) our own */
50 #define IS_LOOPBACK 2 /* address is for LOOPBACK */
51 #define IS_BROADCAST 3 /* address is a valid broadcast */
52 #define IS_INVBCAST 4 /* Wrong netmask bcast not for us (unused)*/
53 #define IS_MULTICAST 5 /* Multicast IP address */
54
55 /*
56 * We tag multicasts with these structures.
57 */
58
59 struct dev_mc_list
60 {
61 struct dev_mc_list *next;
62 char dmi_addr[MAX_ADDR_LEN];
63 unsigned short dmi_addrlen;
64 unsigned short dmi_users;
65 };
66
67 struct hh_cache
68 {
69 struct hh_cache *hh_next;
70 void *hh_arp; /* Opaque pointer, used by
71 * any address resolution module,
72 * not only ARP.
73 */
74 unsigned int hh_refcnt; /* number of users */
75 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP */
76 char hh_uptodate; /* hh_data is valid */
77 char hh_data[16]; /* cached hardware header */
78 };
79
80 /*
81 * The DEVICE structure.
82 * Actually, this whole structure is a big mistake. It mixes I/O
83 * data with strictly "high-level" data, and it has to know about
84 * almost every data structure used in the INET module.
85 */
86 struct device
87 {
88
89 /*
90 * This is the first field of the "visible" part of this structure
91 * (i.e. as seen by users in the "Space.c" file). It is the name
92 * the interface.
93 */
94 char *name;
95
96 /* I/O specific fields - FIXME: Merge these and struct ifmap into one */
97 unsigned long rmem_end; /* shmem "recv" end */
98 unsigned long rmem_start; /* shmem "recv" start */
99 unsigned long mem_end; /* shared mem end */
100 unsigned long mem_start; /* shared mem start */
101 unsigned long base_addr; /* device I/O address */
102 unsigned char irq; /* device IRQ number */
103
104 /* Low-level status flags. */
105 volatile unsigned char start, /* start an operation */
106 interrupt; /* interrupt arrived */
107 unsigned long tbusy; /* transmitter busy must be long for bitops */
108
109 struct device *next;
110
111 /* The device initialization function. Called only once. */
112 int (*init)(struct device *dev);
113
114 /* Some hardware also needs these fields, but they are not part of the
115 usual set specified in Space.c. */
116 unsigned char if_port; /* Selectable AUI, TP,..*/
117 unsigned char dma; /* DMA channel */
118
119 struct enet_statistics* (*get_stats)(struct device *dev);
120
121 /*
122 * This marks the end of the "visible" part of the structure. All
123 * fields hereafter are internal to the system, and may change at
124 * will (read: may be cleaned up at will).
125 */
126
127 /* These may be needed for future network-power-down code. */
128 unsigned long trans_start; /* Time (in jiffies) of last Tx */
129 unsigned long last_rx; /* Time of last Rx */
130
131 unsigned short flags; /* interface flags (a la BSD) */
132 unsigned short family; /* address family ID (AF_INET) */
133 unsigned short metric; /* routing metric (not used) */
134 unsigned short mtu; /* interface MTU value */
135 unsigned short type; /* interface hardware type */
136 unsigned short hard_header_len; /* hardware hdr length */
137 void *priv; /* pointer to private data */
138
139 /* Interface address info. */
140 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
141 unsigned char pad; /* make dev_addr aligned to 8 bytes */
142 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
143 unsigned char addr_len; /* hardware address length */
144 unsigned long pa_addr; /* protocol address */
145 unsigned long pa_brdaddr; /* protocol broadcast addr */
146 unsigned long pa_dstaddr; /* protocol P-P other side addr */
147 unsigned long pa_mask; /* protocol netmask */
148 unsigned short pa_alen; /* protocol address length */
149
150 struct dev_mc_list *mc_list; /* Multicast mac addresses */
151 int mc_count; /* Number of installed mcasts */
152
153 struct ip_mc_list *ip_mc_list; /* IP multicast filter chain */
154 __u32 tx_queue_len; /* Max frames per queue allowed */
155
156 /* For load balancing driver pair support */
157
158 unsigned long pkt_queue; /* Packets queued */
159 struct device *slave; /* Slave device */
160 struct net_alias_info *alias_info; /* main dev alias info */
161 struct net_alias *my_alias; /* alias devs */
162
163 /* Pointer to the interface buffers. */
164 struct sk_buff_head buffs[DEV_NUMBUFFS];
165
166 /* Pointers to interface service routines. */
167 int (*open)(struct device *dev);
168 int (*stop)(struct device *dev);
169 int (*hard_start_xmit) (struct sk_buff *skb,
170 struct device *dev);
171 int (*hard_header) (struct sk_buff *skb,
172 struct device *dev,
173 unsigned short type,
174 void *daddr,
175 void *saddr,
176 unsigned len);
177 int (*rebuild_header)(void *eth, struct device *dev,
178 unsigned long raddr, struct sk_buff *skb);
179 #define HAVE_MULTICAST
180 void (*set_multicast_list)(struct device *dev);
181 #define HAVE_SET_MAC_ADDR
182 int (*set_mac_address)(struct device *dev, void *addr);
183 #define HAVE_PRIVATE_IOCTL
184 int (*do_ioctl)(struct device *dev, struct ifreq *ifr, int cmd);
185 #define HAVE_SET_CONFIG
186 int (*set_config)(struct device *dev, struct ifmap *map);
187 #define HAVE_HEADER_CACHE
188 void (*header_cache_bind)(struct hh_cache **hhp, struct device *dev, unsigned short htype, __u32 daddr);
189 void (*header_cache_update)(struct hh_cache *hh, struct device *dev, unsigned char * haddr);
190 #define HAVE_CHANGE_MTU
191 int (*change_mtu)(struct device *dev, int new_mtu);
192 };
193
194
195 struct packet_type {
196 unsigned short type; /* This is really htons(ether_type). */
197 struct device * dev;
198 int (*func) (struct sk_buff *, struct device *,
199 struct packet_type *);
200 void *data;
201 struct packet_type *next;
202 };
203
204
205 #ifdef __KERNEL__
206
207 #include <linux/notifier.h>
208
209 /* Used by dev_rint */
210 #define IN_SKBUFF 1
211
212 extern volatile unsigned long in_bh;
213
214 extern struct device loopback_dev;
215 extern struct device *dev_base;
216 extern struct packet_type *ptype_base[16];
217
218
219 extern int ip_addr_match(unsigned long addr1, unsigned long addr2);
220 extern int ip_chk_addr(unsigned long addr);
221 extern struct device *ip_dev_check(unsigned long daddr);
222 extern unsigned long ip_my_addr(void);
223 extern unsigned long ip_get_mask(unsigned long addr);
224 extern struct device *ip_dev_find(unsigned long addr);
225 extern struct device *dev_getbytype(unsigned short type);
226
227 extern void dev_add_pack(struct packet_type *pt);
228 extern void dev_remove_pack(struct packet_type *pt);
229 extern struct device *dev_get(const char *name);
230 extern int dev_open(struct device *dev);
231 extern int dev_close(struct device *dev);
232 extern void dev_queue_xmit(struct sk_buff *skb, struct device *dev,
233 int pri);
234 #define HAVE_NETIF_RX 1
235 extern void netif_rx(struct sk_buff *skb);
236 extern void dev_transmit(void);
237 extern void net_bh(void);
238 extern void dev_tint(struct device *dev);
239 extern int dev_get_info(char *buffer, char **start, off_t offset, int length, int dummy);
240 extern int dev_ioctl(unsigned int cmd, void *);
241
242 extern void dev_init(void);
243
244 /* Locking protection for page faults during outputs to devices unloaded during the fault */
245
246 extern int dev_lockct;
247
248 /*
249 * These two dont currently need to be interrupt safe
250 * but they may do soon. Do it properly anyway.
251 */
252
253 extern __inline__ void dev_lock_list(void)
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*/
254 {
255 unsigned long flags;
256 save_flags(flags);
257 cli();
258 dev_lockct++;
259 restore_flags(flags);
260 }
261
262 extern __inline__ void dev_unlock_list(void)
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*/
263 {
264 unsigned long flags;
265 save_flags(flags);
266 cli();
267 dev_lockct--;
268 restore_flags(flags);
269 }
270
271 /*
272 * This almost never occurs, isn't in performance critical paths
273 * and we can thus be relaxed about it
274 */
275
276 extern __inline__ void dev_lock_wait(void)
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*/
277 {
278 while(dev_lockct)
279 schedule();
280 }
281
282
283 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
284
285 extern void ether_setup(struct device *dev);
286 extern void tr_setup(struct device *dev);
287 extern int ether_config(struct device *dev, struct ifmap *map);
288 /* Support for loadable net-drivers */
289 extern int register_netdev(struct device *dev);
290 extern void unregister_netdev(struct device *dev);
291 extern int register_netdevice_notifier(struct notifier_block *nb);
292 extern int unregister_netdevice_notifier(struct notifier_block *nb);
293 /* Functions used for multicast support */
294 extern void dev_mc_upload(struct device *dev);
295 extern void dev_mc_delete(struct device *dev, void *addr, int alen, int all);
296 extern void dev_mc_add(struct device *dev, void *addr, int alen, int newonly);
297 extern void dev_mc_discard(struct device *dev);
298 /* This is the wrong place but it'll do for the moment */
299 extern void ip_mc_allhost(struct device *dev);
300 #endif /* __KERNEL__ */
301
302 #endif /* _LINUX_DEV_H */
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*/