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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 #define MAX_HEADER 38
35
36 #define IS_MYADDR 1 /* address is (one of) our own */
37 #define IS_LOOPBACK 2 /* address is for LOOPBACK */
38 #define IS_BROADCAST 3 /* address is a valid broadcast */
39 #define IS_INVBCAST 4 /* Wrong netmask bcast not for us (unused)*/
40 #define IS_MULTICAST 5 /* Multicast IP address */
41
42 /*
43 * We tag these structures with multicasts.
44 */
45
46 struct dev_mc_list
47 {
48 struct dev_mc_list *next;
49 char dmi_addr[MAX_ADDR_LEN];
50 unsigned short dmi_addrlen;
51 unsigned short dmi_users;
52 };
53
54 /*
55 * The DEVICE structure.
56 * Actually, this whole structure is a big mistake. It mixes I/O
57 * data with strictly "high-level" data, and it has to know about
58 * almost every data structure used in the INET module.
59 */
60 struct device
61 {
62
63 /*
64 * This is the first field of the "visible" part of this structure
65 * (i.e. as seen by users in the "Space.c" file). It is the name
66 * the interface.
67 */
68 char *name;
69
70 /* I/O specific fields - FIXME: Merge these and struct ifmap into one */
71 unsigned long rmem_end; /* shmem "recv" end */
72 unsigned long rmem_start; /* shmem "recv" start */
73 unsigned long mem_end; /* sahared mem end */
74 unsigned long mem_start; /* shared mem start */
75 unsigned long base_addr; /* device I/O address */
76 unsigned long tbusy; /* transmitter busy must be long for bitops */
77 unsigned char irq; /* device IRQ number */
78
79 /* Low-level status flags. */
80 volatile unsigned char start, /* start an operation */
81 interrupt; /* interrupt arrived */
82
83 struct device *next;
84
85 /* The device initialization function. Called only once. */
86 int (*init)(struct device *dev);
87
88 /* Some hardware also needs these fields, but they are not part of the
89 usual set specified in Space.c. */
90 unsigned char if_port; /* Selectable AUI, TP,..*/
91 unsigned char dma; /* DMA channel */
92
93 struct enet_statistics* (*get_stats)(struct device *dev);
94
95 /*
96 * This marks the end of the "visible" part of the structure. All
97 * fields hereafter are internal to the system, and may change at
98 * will (read: may be cleaned up at will).
99 */
100
101 /* These may be needed for future network-power-down code. */
102 unsigned long trans_start; /* Time (in jiffies) of last Tx */
103 unsigned long last_rx; /* Time of last Rx */
104
105 unsigned short flags; /* interface flags (a la BSD) */
106 unsigned short family; /* address family ID (AF_INET) */
107 unsigned short metric; /* routing metric (not used) */
108 unsigned short mtu; /* interface MTU value */
109 unsigned short type; /* interface hardware type */
110 unsigned short hard_header_len; /* hardware hdr length */
111 void *priv; /* pointer to private data */
112
113 /* Interface address info. */
114 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
115 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
116 unsigned char addr_len; /* hardware address length */
117 unsigned long pa_addr; /* protocol address */
118 unsigned long pa_brdaddr; /* protocol broadcast addr */
119 unsigned long pa_dstaddr; /* protocol P-P other side addr */
120 unsigned long pa_mask; /* protocol netmask */
121 unsigned short pa_alen; /* protocol address length */
122
123 struct dev_mc_list *mc_list; /* Multicast mac addresses */
124 int mc_count; /* Number of installed mcasts */
125
126 struct ip_mc_list *ip_mc_list; /* IP multicast filter chain */
127
128 /* For load balancing driver pair support */
129
130 unsigned long pkt_queue; /* Packets queued */
131 struct device *slave; /* Slave device */
132
133
134 /* Pointer to the interface buffers. */
135 struct sk_buff_head buffs[DEV_NUMBUFFS];
136
137 /* Pointers to interface service routines. */
138 int (*open)(struct device *dev);
139 int (*stop)(struct device *dev);
140 int (*hard_start_xmit) (struct sk_buff *skb,
141 struct device *dev);
142 int (*hard_header) (struct sk_buff *skb,
143 struct device *dev,
144 unsigned short type,
145 void *daddr,
146 void *saddr,
147 unsigned len);
148 int (*rebuild_header)(void *eth, struct device *dev,
149 unsigned long raddr, struct sk_buff *skb);
150 #define HAVE_MULTICAST
151 void (*set_multicast_list)(struct device *dev,
152 int num_addrs, void *addrs);
153 #define HAVE_SET_MAC_ADDR
154 int (*set_mac_address)(struct device *dev, void *addr);
155 #define HAVE_PRIVATE_IOCTL
156 int (*do_ioctl)(struct device *dev, struct ifreq *ifr, int cmd);
157 #define HAVE_SET_CONFIG
158 int (*set_config)(struct device *dev, struct ifmap *map);
159 int (*header_cache)(struct device *dev, struct sock *sk, unsigned long saddr, unsigned long daddr);
160 };
161
162
163 struct packet_type {
164 unsigned short type; /* This is really htons(ether_type). */
165 struct device * dev;
166 int (*func) (struct sk_buff *, struct device *,
167 struct packet_type *);
168 void *data;
169 struct packet_type *next;
170 };
171
172
173 #ifdef __KERNEL__
174
175 #include <linux/notifier.h>
176
177 /* Used by dev_rint */
178 #define IN_SKBUFF 1
179
180 extern volatile char in_bh;
181
182 extern struct device loopback_dev;
183 extern struct device *dev_base;
184 extern struct packet_type *ptype_base[16];
185
186
187 extern int ip_addr_match(unsigned long addr1, unsigned long addr2);
188 extern int ip_chk_addr(unsigned long addr);
189 extern struct device *ip_dev_check(unsigned long daddr);
190 extern unsigned long ip_my_addr(void);
191 extern unsigned long ip_get_mask(unsigned long addr);
192
193 extern void dev_add_pack(struct packet_type *pt);
194 extern void dev_remove_pack(struct packet_type *pt);
195 extern struct device *dev_get(char *name);
196 extern int dev_open(struct device *dev);
197 extern int dev_close(struct device *dev);
198 extern void dev_queue_xmit(struct sk_buff *skb, struct device *dev,
199 int pri);
200 #define HAVE_NETIF_RX 1
201 extern void netif_rx(struct sk_buff *skb);
202 /* The old interface to netif_rx(). */
203 extern int dev_rint(unsigned char *buff, long len, int flags,
204 struct device * dev);
205 extern void dev_transmit(void);
206 extern int in_net_bh(void);
207 extern void net_bh(void *tmp);
208 extern void dev_tint(struct device *dev);
209 extern int dev_get_info(char *buffer, char **start, off_t offset, int length);
210 extern int dev_ioctl(unsigned int cmd, void *);
211
212 extern void dev_init(void);
213
214 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
215
216 extern void ether_setup(struct device *dev);
217 extern void tr_setup(struct device *dev);
218 extern int ether_config(struct device *dev, struct ifmap *map);
219 /* Support for loadable net-drivers */
220 extern int register_netdev(struct device *dev);
221 extern void unregister_netdev(struct device *dev);
222 extern int register_netdevice_notifier(struct notifier_block *nb);
223 extern int unregister_netdevice_notifier(struct notifier_block *nb);
224 /* Functions used for multicast support */
225 extern void dev_mc_upload(struct device *dev);
226 extern void dev_mc_delete(struct device *dev, void *addr, int alen, int all);
227 extern void dev_mc_add(struct device *dev, void *addr, int alen, int newonly);
228 extern void dev_mc_discard(struct device *dev);
229 /* This is the wrong place but it'll do for the moment */
230 extern void ip_mc_allhost(struct device *dev);
231 #endif /* __KERNEL__ */
232
233 #endif /* _LINUX_DEV_H */
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*/