1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4  */
5 
6 #ifndef __UM_NET_USER_H__
7 #define __UM_NET_USER_H__
8 
9 #define ETH_ADDR_LEN (6)
10 #define ETH_HEADER_ETHERTAP (16)
11 #define ETH_HEADER_OTHER (26) /* 14 for ethernet + VLAN + MPLS for crazy people */
12 #define ETH_MAX_PACKET (1500)
13 
14 #define UML_NET_VERSION (4)
15 
16 struct net_user_info {
17 	int (*init)(void *, void *);
18 	int (*open)(void *);
19 	void (*close)(int, void *);
20 	void (*remove)(void *);
21 	void (*add_address)(unsigned char *, unsigned char *, void *);
22 	void (*delete_address)(unsigned char *, unsigned char *, void *);
23 	int max_packet;
24 	int mtu;
25 };
26 
27 extern void iter_addresses(void *d, void (*cb)(unsigned char *,
28 					       unsigned char *, void *),
29 			   void *arg);
30 
31 extern void *get_output_buffer(int *len_out);
32 extern void free_output_buffer(void *buffer);
33 
34 extern int tap_open_common(void *dev, char *gate_addr);
35 extern void tap_check_ips(char *gate_addr, unsigned char *eth_addr);
36 
37 extern void read_output(int fd, char *output_out, int len);
38 
39 extern int net_read(int fd, void *buf, int len);
40 extern int net_recvfrom(int fd, void *buf, int len);
41 extern int net_write(int fd, void *buf, int len);
42 extern int net_send(int fd, void *buf, int len);
43 extern int net_sendto(int fd, void *buf, int len, void *to, int sock_len);
44 
45 extern void open_addr(unsigned char *addr, unsigned char *netmask, void *arg);
46 extern void close_addr(unsigned char *addr, unsigned char *netmask, void *arg);
47 
48 extern char *split_if_spec(char *str, ...);
49 
50 extern int dev_netmask(void *d, void *m);
51 
52 #endif
53