1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/* Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _NET_IF_H
#define _NET_IF_H 1
#include <features.h>
#include <sys/types.h>
#include <sys/socket.h>
/* Standard interface flags. */
enum
{
IFF_UP = 0x1, /* Interface is up. */
IFF_BROADCAST = 0x2, /* Broadcast address valid. */
IFF_DEBUG = 0x4, /* Turn on debugging. */
IFF_LOOPBACK = 0x8, /* Is a loopback net. */
IFF_POINTOPOINT = 0x10, /* Interface is point-to-point link. */
IFF_NOTRAILERS = 0x20, /* Avoid use of trailers. */
IFF_RUNNING = 0x40, /* Resources allocated. */
IFF_NOARP = 0x80, /* No address resolution protocol. */
IFF_PROMISC = 0x100, /* Receive all packets. */
/* Not supported */
IFF_ALLMULTI = 0x200, /* Receive all multicast packets. */
IFF_MASTER = 0x400, /* Master of a load balancer. */
IFF_SLAVE = 0x800, /* Slave of a load balancer. */
IFF_MULTICAST = 0x1000, /* Supports multicast. */
IFF_PORTSEL = 0x2000, /* Can set media type. */
IFF_AUTOMEDIA = 0x4000 /* Auto media select active. */
};
/* The ifaddr structure contains information about one address of an
interface. They are maintained by the different address families,
are allocated and attached when an address is set, and are linked
together so all addresses for an interface can be located. */
struct ifaddr
{
struct sockaddr ifa_addr; /* Address of interface. */
union
{
struct sockaddr ifu_broadaddr;
struct sockaddr ifu_dstaddr;
} ifa_ifu;
struct iface *ifa_ifp; /* Back-pointer to interface. */
struct ifaddr *ifa_next; /* Next address for interface. */
};
#define ifa_broadaddr ifa_ifu.ifu_broadaddr /* broadcast address */
#define ifa_dstaddr ifa_ifu.ifu_dstaddr /* other end of link */
/* Device mapping structure. I'd just gone off and designed a
beautiful scheme using only loadable modules with arguments for
driver options and along come the PCMCIA people 8)
Ah well. The get() side of this is good for WDSETUP, and it'll be
handy for debugging things. The set side is fine for now and being
very small might be worth keeping for clean configuration. */
struct ifmap
{
unsigned long int mem_start;
unsigned long int mem_end;
unsigned short int base_addr;
unsigned char irq;
unsigned char dma;
unsigned char port;
/* 3 bytes spare */
};
/* Interface request structure used for socket ioctl's. All interface
ioctl's must have parameter definitions which begin with ifr_name.
The remainder may be interface specific. */
struct ifreq
{
#define IFHWADDRLEN 6
#define IFNAMSIZ 16
union
{
char ifrn_name[IFNAMSIZ]; /* Interface name, e.g. "en0". */
} ifr_ifrn;
union
{
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short int ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
__caddr_t ifru_data;
} ifr_ifru;
};
#define ifr_name ifr_ifrn.ifrn_name /* interface name */
#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
#define ifr_addr ifr_ifru.ifru_addr /* address */
#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */
#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
#define ifr_flags ifr_ifru.ifru_flags /* flags */
#define ifr_metric ifr_ifru.ifru_ivalue /* metric */
#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
#define ifr_map ifr_ifru.ifru_map /* device map */
#define ifr_slave ifr_ifru.ifru_slave /* slave device */
#define ifr_data ifr_ifru.ifru_data /* for use by interface */
#define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index */
/* Structure used in SIOCGIFCONF request. Used to retrieve interface
configuration for machine (useful for programs which must know all
networks accessible). */
struct ifconf
{
int ifc_len; /* Size of buffer. */
union
{
__caddr_t ifcu_buf;
struct ifreq *ifcu_req;
} ifc_ifcu;
};
#define ifc_buf ifc_ifcu.ifcu_buf /* Buffer address. */
#define ifc_req ifc_ifcu.ifcu_req /* Array of structures. */
/* Convert an interface name to an index, and vice versa. */
unsigned int if_nametoindex(const char *ifname);
char *if_indextoname(unsigned int ifindex, char *ifname);
/* Return a list of all interfaces and their indices. */
struct if_nameindex {
unsigned int if_index; /* 1, 2, ... */
char *if_name; /* null terminated name: "eth0", ... */
};
struct if_nameindex *if_nameindex(void);
/* Free the data returned from if_nameindex. */
void if_freenameindex(struct if_nameindex *ptr);
#endif /* net/if.h */
|
