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