lib: introduce Linux route netlink binding

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 296 insertions, 0 deletions

diff --git a/include/linux/if.h b/include/linux/if.h
new file mode 100644
index 0000000..b287b2a
--- /dev/null
+++ b/include/linux/if.h
@@ -0,0 +1,296 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Global definitions for the INET interface module.
+ *
+ * Version:	@(#)if.h	1.0.2	04/18/93
+ *
+ * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988
+ *		Ross Biro
+ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ */
+#ifndef _LINUX_IF_H
+#define _LINUX_IF_H
+
+#include <linux/libc-compat.h>          /* for compatibility with glibc */
+#include <linux/types.h>		/* for "__kernel_caddr_t" et al	*/
+#include <linux/socket.h>		/* for "struct sockaddr" et al	*/
+		/* for "__user" et al           */
+
+#include <sys/socket.h>			/* for struct sockaddr.		*/
+
+#if __UAPI_DEF_IF_IFNAMSIZ
+#define	IFNAMSIZ	16
+#endif /* __UAPI_DEF_IF_IFNAMSIZ */
+#define	IFALIASZ	256
+#define	ALTIFNAMSIZ	128
+#include <linux/hdlc/ioctl.h>
+
+/* For glibc compatibility. An empty enum does not compile. */
+#if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || \
+    __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0
+/**
+ * enum net_device_flags - &struct net_device flags
+ *
+ * These are the &struct net_device flags, they can be set by drivers, the
+ * kernel and some can be triggered by userspace. Userspace can query and
+ * set these flags using userspace utilities but there is also a sysfs
+ * entry available for all dev flags which can be queried and set. These flags
+ * are shared for all types of net_devices. The sysfs entries are available
+ * via /sys/class/net/<dev>/flags. Flags which can be toggled through sysfs
+ * are annotated below, note that only a few flags can be toggled and some
+ * other flags are always preserved from the original net_device flags
+ * even if you try to set them via sysfs. Flags which are always preserved
+ * are kept under the flag grouping @IFF_VOLATILE. Flags which are __volatile__
+ * are annotated below as such.
+ *
+ * You should have a pretty good reason to be extending these flags.
+ *
+ * @IFF_UP: interface is up. Can be toggled through sysfs.
+ * @IFF_BROADCAST: broadcast address valid. Volatile.
+ * @IFF_DEBUG: turn on debugging. Can be toggled through sysfs.
+ * @IFF_LOOPBACK: is a loopback net. Volatile.
+ * @IFF_POINTOPOINT: interface is has p-p link. Volatile.
+ * @IFF_NOTRAILERS: avoid use of trailers. Can be toggled through sysfs.
+ *	Volatile.
+ * @IFF_RUNNING: interface RFC2863 OPER_UP. Volatile.
+ * @IFF_NOARP: no ARP protocol. Can be toggled through sysfs. Volatile.
+ * @IFF_PROMISC: receive all packets. Can be toggled through sysfs.
+ * @IFF_ALLMULTI: receive all multicast packets. Can be toggled through
+ *	sysfs.
+ * @IFF_MASTER: master of a load balancer. Volatile.
+ * @IFF_SLAVE: slave of a load balancer. Volatile.
+ * @IFF_MULTICAST: Supports multicast. Can be toggled through sysfs.
+ * @IFF_PORTSEL: can set media type. Can be toggled through sysfs.
+ * @IFF_AUTOMEDIA: auto media select active. Can be toggled through sysfs.
+ * @IFF_DYNAMIC: dialup device with changing addresses. Can be toggled
+ *	through sysfs.
+ * @IFF_LOWER_UP: driver signals L1 up. Volatile.
+ * @IFF_DORMANT: driver signals dormant. Volatile.
+ * @IFF_ECHO: echo sent packets. Volatile.
+ */
+enum net_device_flags {
+/* for compatibility with glibc net/if.h */
+#if __UAPI_DEF_IF_NET_DEVICE_FLAGS
+	IFF_UP				= 1<<0,  /* sysfs */
+	IFF_BROADCAST			= 1<<1,  /* __volatile__ */
+	IFF_DEBUG			= 1<<2,  /* sysfs */
+	IFF_LOOPBACK			= 1<<3,  /* __volatile__ */
+	IFF_POINTOPOINT			= 1<<4,  /* __volatile__ */
+	IFF_NOTRAILERS			= 1<<5,  /* sysfs */
+	IFF_RUNNING			= 1<<6,  /* __volatile__ */
+	IFF_NOARP			= 1<<7,  /* sysfs */
+	IFF_PROMISC			= 1<<8,  /* sysfs */
+	IFF_ALLMULTI			= 1<<9,  /* sysfs */
+	IFF_MASTER			= 1<<10, /* __volatile__ */
+	IFF_SLAVE			= 1<<11, /* __volatile__ */
+	IFF_MULTICAST			= 1<<12, /* sysfs */
+	IFF_PORTSEL			= 1<<13, /* sysfs */
+	IFF_AUTOMEDIA			= 1<<14, /* sysfs */
+	IFF_DYNAMIC			= 1<<15, /* sysfs */
+#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */
+#if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+	IFF_LOWER_UP			= 1<<16, /* __volatile__ */
+	IFF_DORMANT			= 1<<17, /* __volatile__ */
+	IFF_ECHO			= 1<<18, /* __volatile__ */
+#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
+};
+#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0 */
+
+/* for compatibility with glibc net/if.h */
+#if __UAPI_DEF_IF_NET_DEVICE_FLAGS
+#define IFF_UP				IFF_UP
+#define IFF_BROADCAST			IFF_BROADCAST
+#define IFF_DEBUG			IFF_DEBUG
+#define IFF_LOOPBACK			IFF_LOOPBACK
+#define IFF_POINTOPOINT			IFF_POINTOPOINT
+#define IFF_NOTRAILERS			IFF_NOTRAILERS
+#define IFF_RUNNING			IFF_RUNNING
+#define IFF_NOARP			IFF_NOARP
+#define IFF_PROMISC			IFF_PROMISC
+#define IFF_ALLMULTI			IFF_ALLMULTI
+#define IFF_MASTER			IFF_MASTER
+#define IFF_SLAVE			IFF_SLAVE
+#define IFF_MULTICAST			IFF_MULTICAST
+#define IFF_PORTSEL			IFF_PORTSEL
+#define IFF_AUTOMEDIA			IFF_AUTOMEDIA
+#define IFF_DYNAMIC			IFF_DYNAMIC
+#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */
+
+#if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
+#define IFF_LOWER_UP			IFF_LOWER_UP
+#define IFF_DORMANT			IFF_DORMANT
+#define IFF_ECHO			IFF_ECHO
+#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
+
+#define IFF_VOLATILE	(IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\
+		IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)
+
+#define IF_GET_IFACE	0x0001		/* for querying only */
+#define IF_GET_PROTO	0x0002
+
+/* For definitions see hdlc.h */
+#define IF_IFACE_V35	0x1000		/* V.35 serial interface	*/
+#define IF_IFACE_V24	0x1001		/* V.24 serial interface	*/
+#define IF_IFACE_X21	0x1002		/* X.21 serial interface	*/
+#define IF_IFACE_T1	0x1003		/* T1 telco serial interface	*/
+#define IF_IFACE_E1	0x1004		/* E1 telco serial interface	*/
+#define IF_IFACE_SYNC_SERIAL 0x1005	/* can't be set by software	*/
+#define IF_IFACE_X21D   0x1006          /* X.21 Dual Clocking (FarSite) */
+
+/* For definitions see hdlc.h */
+#define IF_PROTO_HDLC	0x2000		/* raw HDLC protocol		*/
+#define IF_PROTO_PPP	0x2001		/* PPP protocol			*/
+#define IF_PROTO_CISCO	0x2002		/* Cisco HDLC protocol		*/
+#define IF_PROTO_FR	0x2003		/* Frame Relay protocol		*/
+#define IF_PROTO_FR_ADD_PVC 0x2004	/*    Create FR PVC		*/
+#define IF_PROTO_FR_DEL_PVC 0x2005	/*    Delete FR PVC		*/
+#define IF_PROTO_X25	0x2006		/* X.25				*/
+#define IF_PROTO_HDLC_ETH 0x2007	/* raw HDLC, Ethernet emulation	*/
+#define IF_PROTO_FR_ADD_ETH_PVC 0x2008	/*  Create FR Ethernet-bridged PVC */
+#define IF_PROTO_FR_DEL_ETH_PVC 0x2009	/*  Delete FR Ethernet-bridged PVC */
+#define IF_PROTO_FR_PVC	0x200A		/* for reading PVC status	*/
+#define IF_PROTO_FR_ETH_PVC 0x200B
+#define IF_PROTO_RAW    0x200C          /* RAW Socket                   */
+
+/* RFC 2863 operational status */
+enum {
+	IF_OPER_UNKNOWN,
+	IF_OPER_NOTPRESENT,
+	IF_OPER_DOWN,
+	IF_OPER_LOWERLAYERDOWN,
+	IF_OPER_TESTING,
+	IF_OPER_DORMANT,
+	IF_OPER_UP,
+};
+
+/* link modes */
+enum {
+	IF_LINK_MODE_DEFAULT,
+	IF_LINK_MODE_DORMANT,	/* limit upward transition to dormant */
+	IF_LINK_MODE_TESTING,	/* limit upward transition to testing */
+};
+
+/*
+ *	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.
+ */
+
+/* for compatibility with glibc net/if.h */
+#if __UAPI_DEF_IF_IFMAP
+struct ifmap {
+	unsigned long mem_start;
+	unsigned long mem_end;
+	unsigned short base_addr; 
+	unsigned char irq;
+	unsigned char dma;
+	unsigned char port;
+	/* 3 bytes spare */
+};
+#endif /* __UAPI_DEF_IF_IFMAP */
+
+struct if_settings {
+	unsigned int type;	/* Type of physical device or protocol */
+	unsigned int size;	/* Size of the data allocated by the caller */
+	union {
+		/* {atm/eth/dsl}_settings anyone ? */
+		raw_hdlc_proto		*raw_hdlc;
+		cisco_proto		*cisco;
+		fr_proto		*fr;
+		fr_proto_pvc		*fr_pvc;
+		fr_proto_pvc_info	*fr_pvc_info;
+		x25_hdlc_proto		*x25;
+
+		/* interface settings */
+		sync_serial_settings	*sync;
+		te1_settings		*te1;
+	} ifs_ifsu;
+};
+
+/*
+ * 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.
+ */
+
+/* for compatibility with glibc net/if.h */
+#if __UAPI_DEF_IF_IFREQ
+struct ifreq {
+#define IFHWADDRLEN	6
+	union
+	{
+		char	ifrn_name[IFNAMSIZ];		/* if 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	ifru_flags;
+		int	ifru_ivalue;
+		int	ifru_mtu;
+		struct  ifmap ifru_map;
+		char	ifru_slave[IFNAMSIZ];	/* Just fits the size */
+		char	ifru_newname[IFNAMSIZ];
+		void *	ifru_data;
+		struct	if_settings ifru_settings;
+	} ifr_ifru;
+};
+#endif /* __UAPI_DEF_IF_IFREQ */
+
+#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	*/
+#define ifr_bandwidth	ifr_ifru.ifru_ivalue    /* link bandwidth	*/
+#define ifr_qlen	ifr_ifru.ifru_ivalue	/* Queue length 	*/
+#define ifr_newname	ifr_ifru.ifru_newname	/* New name		*/
+#define ifr_settings	ifr_ifru.ifru_settings	/* Device/proto settings*/
+
+/*
+ * Structure used in SIOCGIFCONF request.
+ * Used to retrieve interface configuration
+ * for machine (useful for programs which
+ * must know all networks accessible).
+ */
+
+/* for compatibility with glibc net/if.h */
+#if __UAPI_DEF_IF_IFCONF
+struct ifconf  {
+	int	ifc_len;			/* size of buffer	*/
+	union {
+		char *ifcu_buf;
+		struct ifreq *ifcu_req;
+	} ifc_ifcu;
+};
+#endif /* __UAPI_DEF_IF_IFCONF */
+
+#define	ifc_buf	ifc_ifcu.ifcu_buf		/* buffer address	*/
+#define	ifc_req	ifc_ifcu.ifcu_req		/* array of structures	*/
+
+#endif /* _LINUX_IF_H */