1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  * INET		An implementation of the TCP/IP protocol suite for the LINUX
4  *		operating system.  INET is implemented using the  BSD Socket
5  *		interface as the means of communication with the user level.
6  *
7  *		Global definitions for the INET interface module.
8  *
9  * Version:	@(#)if.h	1.0.2	04/18/93
10  *
11  * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988
12  *		Ross Biro
13  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
14  *
15  *		This program is free software; you can redistribute it and/or
16  *		modify it under the terms of the GNU General Public License
17  *		as published by the Free Software Foundation; either version
18  *		2 of the License, or (at your option) any later version.
19  */
20 #ifndef _LINUX_IF_H
21 #define _LINUX_IF_H
22 
23 #include <linux/libc-compat.h>          /* for compatibility with glibc */
24 #include <linux/types.h>		/* for "__kernel_caddr_t" et al	*/
25 #include <linux/socket.h>		/* for "struct sockaddr" et al	*/
26 #include <linux/compiler.h>		/* for "__user" et al           */
27 
28 #ifndef __KERNEL__
29 #include <sys/socket.h>			/* for struct sockaddr.		*/
30 #endif
31 
32 #if __UAPI_DEF_IF_IFNAMSIZ
33 #define	IFNAMSIZ	16
34 #endif /* __UAPI_DEF_IF_IFNAMSIZ */
35 #define	IFALIASZ	256
36 #define	ALTIFNAMSIZ	128
37 #include <linux/hdlc/ioctl.h>
38 
39 /* For glibc compatibility. An empty enum does not compile. */
40 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || \
41     __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0
42 /**
43  * enum net_device_flags - &struct net_device flags
44  *
45  * These are the &struct net_device flags, they can be set by drivers, the
46  * kernel and some can be triggered by userspace. Userspace can query and
47  * set these flags using userspace utilities but there is also a sysfs
48  * entry available for all dev flags which can be queried and set. These flags
49  * are shared for all types of net_devices. The sysfs entries are available
50  * via /sys/class/net/<dev>/flags. Flags which can be toggled through sysfs
51  * are annotated below, note that only a few flags can be toggled and some
52  * other flags are always preserved from the original net_device flags
53  * even if you try to set them via sysfs. Flags which are always preserved
54  * are kept under the flag grouping @IFF_VOLATILE. Flags which are volatile
55  * are annotated below as such.
56  *
57  * You should have a pretty good reason to be extending these flags.
58  *
59  * @IFF_UP: interface is up. Can be toggled through sysfs.
60  * @IFF_BROADCAST: broadcast address valid. Volatile.
61  * @IFF_DEBUG: turn on debugging. Can be toggled through sysfs.
62  * @IFF_LOOPBACK: is a loopback net. Volatile.
63  * @IFF_POINTOPOINT: interface is has p-p link. Volatile.
64  * @IFF_NOTRAILERS: avoid use of trailers. Can be toggled through sysfs.
65  *	Volatile.
66  * @IFF_RUNNING: interface RFC2863 OPER_UP. Volatile.
67  * @IFF_NOARP: no ARP protocol. Can be toggled through sysfs. Volatile.
68  * @IFF_PROMISC: receive all packets. Can be toggled through sysfs.
69  * @IFF_ALLMULTI: receive all multicast packets. Can be toggled through
70  *	sysfs.
71  * @IFF_MASTER: master of a load balancer. Volatile.
72  * @IFF_SLAVE: slave of a load balancer. Volatile.
73  * @IFF_MULTICAST: Supports multicast. Can be toggled through sysfs.
74  * @IFF_PORTSEL: can set media type. Can be toggled through sysfs.
75  * @IFF_AUTOMEDIA: auto media select active. Can be toggled through sysfs.
76  * @IFF_DYNAMIC: dialup device with changing addresses. Can be toggled
77  *	through sysfs.
78  * @IFF_LOWER_UP: driver signals L1 up. Volatile.
79  * @IFF_DORMANT: driver signals dormant. Volatile.
80  * @IFF_ECHO: echo sent packets. Volatile.
81  */
82 enum net_device_flags {
83 /* for compatibility with glibc net/if.h */
84 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS
85 	IFF_UP				= 1<<0,  /* sysfs */
86 	IFF_BROADCAST			= 1<<1,  /* volatile */
87 	IFF_DEBUG			= 1<<2,  /* sysfs */
88 	IFF_LOOPBACK			= 1<<3,  /* volatile */
89 	IFF_POINTOPOINT			= 1<<4,  /* volatile */
90 	IFF_NOTRAILERS			= 1<<5,  /* sysfs */
91 	IFF_RUNNING			= 1<<6,  /* volatile */
92 	IFF_NOARP			= 1<<7,  /* sysfs */
93 	IFF_PROMISC			= 1<<8,  /* sysfs */
94 	IFF_ALLMULTI			= 1<<9,  /* sysfs */
95 	IFF_MASTER			= 1<<10, /* volatile */
96 	IFF_SLAVE			= 1<<11, /* volatile */
97 	IFF_MULTICAST			= 1<<12, /* sysfs */
98 	IFF_PORTSEL			= 1<<13, /* sysfs */
99 	IFF_AUTOMEDIA			= 1<<14, /* sysfs */
100 	IFF_DYNAMIC			= 1<<15, /* sysfs */
101 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */
102 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
103 	IFF_LOWER_UP			= 1<<16, /* volatile */
104 	IFF_DORMANT			= 1<<17, /* volatile */
105 	IFF_ECHO			= 1<<18, /* volatile */
106 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
107 };
108 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0 */
109 
110 /* for compatibility with glibc net/if.h */
111 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS
112 #define IFF_UP				IFF_UP
113 #define IFF_BROADCAST			IFF_BROADCAST
114 #define IFF_DEBUG			IFF_DEBUG
115 #define IFF_LOOPBACK			IFF_LOOPBACK
116 #define IFF_POINTOPOINT			IFF_POINTOPOINT
117 #define IFF_NOTRAILERS			IFF_NOTRAILERS
118 #define IFF_RUNNING			IFF_RUNNING
119 #define IFF_NOARP			IFF_NOARP
120 #define IFF_PROMISC			IFF_PROMISC
121 #define IFF_ALLMULTI			IFF_ALLMULTI
122 #define IFF_MASTER			IFF_MASTER
123 #define IFF_SLAVE			IFF_SLAVE
124 #define IFF_MULTICAST			IFF_MULTICAST
125 #define IFF_PORTSEL			IFF_PORTSEL
126 #define IFF_AUTOMEDIA			IFF_AUTOMEDIA
127 #define IFF_DYNAMIC			IFF_DYNAMIC
128 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */
129 
130 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
131 #define IFF_LOWER_UP			IFF_LOWER_UP
132 #define IFF_DORMANT			IFF_DORMANT
133 #define IFF_ECHO			IFF_ECHO
134 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
135 
136 #define IFF_VOLATILE	(IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\
137 		IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)
138 
139 #define IF_GET_IFACE	0x0001		/* for querying only */
140 #define IF_GET_PROTO	0x0002
141 
142 /* For definitions see hdlc.h */
143 #define IF_IFACE_V35	0x1000		/* V.35 serial interface	*/
144 #define IF_IFACE_V24	0x1001		/* V.24 serial interface	*/
145 #define IF_IFACE_X21	0x1002		/* X.21 serial interface	*/
146 #define IF_IFACE_T1	0x1003		/* T1 telco serial interface	*/
147 #define IF_IFACE_E1	0x1004		/* E1 telco serial interface	*/
148 #define IF_IFACE_SYNC_SERIAL 0x1005	/* can't be set by software	*/
149 #define IF_IFACE_X21D   0x1006          /* X.21 Dual Clocking (FarSite) */
150 
151 /* For definitions see hdlc.h */
152 #define IF_PROTO_HDLC	0x2000		/* raw HDLC protocol		*/
153 #define IF_PROTO_PPP	0x2001		/* PPP protocol			*/
154 #define IF_PROTO_CISCO	0x2002		/* Cisco HDLC protocol		*/
155 #define IF_PROTO_FR	0x2003		/* Frame Relay protocol		*/
156 #define IF_PROTO_FR_ADD_PVC 0x2004	/*    Create FR PVC		*/
157 #define IF_PROTO_FR_DEL_PVC 0x2005	/*    Delete FR PVC		*/
158 #define IF_PROTO_X25	0x2006		/* X.25				*/
159 #define IF_PROTO_HDLC_ETH 0x2007	/* raw HDLC, Ethernet emulation	*/
160 #define IF_PROTO_FR_ADD_ETH_PVC 0x2008	/*  Create FR Ethernet-bridged PVC */
161 #define IF_PROTO_FR_DEL_ETH_PVC 0x2009	/*  Delete FR Ethernet-bridged PVC */
162 #define IF_PROTO_FR_PVC	0x200A		/* for reading PVC status	*/
163 #define IF_PROTO_FR_ETH_PVC 0x200B
164 #define IF_PROTO_RAW    0x200C          /* RAW Socket                   */
165 
166 /* RFC 2863 operational status */
167 enum {
168 	IF_OPER_UNKNOWN,
169 	IF_OPER_NOTPRESENT,
170 	IF_OPER_DOWN,
171 	IF_OPER_LOWERLAYERDOWN,
172 	IF_OPER_TESTING,
173 	IF_OPER_DORMANT,
174 	IF_OPER_UP,
175 };
176 
177 /* link modes */
178 enum {
179 	IF_LINK_MODE_DEFAULT,
180 	IF_LINK_MODE_DORMANT,	/* limit upward transition to dormant */
181 	IF_LINK_MODE_TESTING,	/* limit upward transition to testing */
182 };
183 
184 /*
185  *	Device mapping structure. I'd just gone off and designed a
186  *	beautiful scheme using only loadable modules with arguments
187  *	for driver options and along come the PCMCIA people 8)
188  *
189  *	Ah well. The get() side of this is good for WDSETUP, and it'll
190  *	be handy for debugging things. The set side is fine for now and
191  *	being very small might be worth keeping for clean configuration.
192  */
193 
194 /* for compatibility with glibc net/if.h */
195 #if __UAPI_DEF_IF_IFMAP
196 struct ifmap {
197 	unsigned long mem_start;
198 	unsigned long mem_end;
199 	unsigned short base_addr;
200 	unsigned char irq;
201 	unsigned char dma;
202 	unsigned char port;
203 	/* 3 bytes spare */
204 };
205 #endif /* __UAPI_DEF_IF_IFMAP */
206 
207 struct if_settings {
208 	unsigned int type;	/* Type of physical device or protocol */
209 	unsigned int size;	/* Size of the data allocated by the caller */
210 	union {
211 		/* {atm/eth/dsl}_settings anyone ? */
212 		raw_hdlc_proto		__user *raw_hdlc;
213 		cisco_proto		__user *cisco;
214 		fr_proto		__user *fr;
215 		fr_proto_pvc		__user *fr_pvc;
216 		fr_proto_pvc_info	__user *fr_pvc_info;
217 		x25_hdlc_proto		__user *x25;
218 
219 		/* interface settings */
220 		sync_serial_settings	__user *sync;
221 		te1_settings		__user *te1;
222 	} ifs_ifsu;
223 };
224 
225 /*
226  * Interface request structure used for socket
227  * ioctl's.  All interface ioctl's must have parameter
228  * definitions which begin with ifr_name.  The
229  * remainder may be interface specific.
230  */
231 
232 /* for compatibility with glibc net/if.h */
233 #if __UAPI_DEF_IF_IFREQ
234 struct ifreq {
235 #define IFHWADDRLEN	6
236 	union
237 	{
238 		char	ifrn_name[IFNAMSIZ];		/* if name, e.g. "en0" */
239 	} ifr_ifrn;
240 
241 	union {
242 		struct	sockaddr ifru_addr;
243 		struct	sockaddr ifru_dstaddr;
244 		struct	sockaddr ifru_broadaddr;
245 		struct	sockaddr ifru_netmask;
246 		struct  sockaddr ifru_hwaddr;
247 		short	ifru_flags;
248 		int	ifru_ivalue;
249 		int	ifru_mtu;
250 		struct  ifmap ifru_map;
251 		char	ifru_slave[IFNAMSIZ];	/* Just fits the size */
252 		char	ifru_newname[IFNAMSIZ];
253 		void __user *	ifru_data;
254 		struct	if_settings ifru_settings;
255 	} ifr_ifru;
256 };
257 #endif /* __UAPI_DEF_IF_IFREQ */
258 
259 #define ifr_name	ifr_ifrn.ifrn_name	/* interface name 	*/
260 #define ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address 		*/
261 #define	ifr_addr	ifr_ifru.ifru_addr	/* address		*/
262 #define	ifr_dstaddr	ifr_ifru.ifru_dstaddr	/* other end of p-p lnk	*/
263 #define	ifr_broadaddr	ifr_ifru.ifru_broadaddr	/* broadcast address	*/
264 #define	ifr_netmask	ifr_ifru.ifru_netmask	/* interface net mask	*/
265 #define	ifr_flags	ifr_ifru.ifru_flags	/* flags		*/
266 #define	ifr_metric	ifr_ifru.ifru_ivalue	/* metric		*/
267 #define	ifr_mtu		ifr_ifru.ifru_mtu	/* mtu			*/
268 #define ifr_map		ifr_ifru.ifru_map	/* device map		*/
269 #define ifr_slave	ifr_ifru.ifru_slave	/* slave device		*/
270 #define	ifr_data	ifr_ifru.ifru_data	/* for use by interface	*/
271 #define ifr_ifindex	ifr_ifru.ifru_ivalue	/* interface index	*/
272 #define ifr_bandwidth	ifr_ifru.ifru_ivalue    /* link bandwidth	*/
273 #define ifr_qlen	ifr_ifru.ifru_ivalue	/* Queue length 	*/
274 #define ifr_newname	ifr_ifru.ifru_newname	/* New name		*/
275 #define ifr_settings	ifr_ifru.ifru_settings	/* Device/proto settings*/
276 
277 /*
278  * Structure used in SIOCGIFCONF request.
279  * Used to retrieve interface configuration
280  * for machine (useful for programs which
281  * must know all networks accessible).
282  */
283 
284 /* for compatibility with glibc net/if.h */
285 #if __UAPI_DEF_IF_IFCONF
286 struct ifconf  {
287 	int	ifc_len;			/* size of buffer	*/
288 	union {
289 		char __user *ifcu_buf;
290 		struct ifreq __user *ifcu_req;
291 	} ifc_ifcu;
292 };
293 #endif /* __UAPI_DEF_IF_IFCONF */
294 
295 #define	ifc_buf	ifc_ifcu.ifcu_buf		/* buffer address	*/
296 #define	ifc_req	ifc_ifcu.ifcu_req		/* array of structures	*/
297 
298 #endif /* _LINUX_IF_H */
299