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