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