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✏️ Editing: route.h

/* Copyright (C) 1997-2018 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/* Based on the 4.4BSD and Linux version of this file.  */

#ifndef _NET_ROUTE_H
#define _NET_ROUTE_H	1

#include <features.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <bits/wordsize.h>

/* This structure gets passed by the SIOCADDRT and SIOCDELRT calls. */
struct rtentry
  {
    unsigned long int rt_pad1;
    struct sockaddr rt_dst;		/* Target address.  */
    struct sockaddr rt_gateway;		/* Gateway addr (RTF_GATEWAY).  */
    struct sockaddr rt_genmask;		/* Target network mask (IP).  */
    unsigned short int rt_flags;
    short int rt_pad2;
    unsigned long int rt_pad3;
    unsigned char rt_tos;
    unsigned char rt_class;
#if __WORDSIZE == 64
    short int rt_pad4[3];
#else
    short int rt_pad4;
#endif
    short int rt_metric;		/* +1 for binary compatibility!  */
    char *rt_dev;			/* Forcing the device at add.  */
    unsigned long int rt_mtu;		/* Per route MTU/Window.  */
    unsigned long int rt_window;	/* Window clamping.  */
    unsigned short int rt_irtt;		/* Initial RTT.  */
  };
/* Compatibility hack.  */
#define rt_mss	rt_mtu

struct in6_rtmsg
  {
    struct in6_addr rtmsg_dst;
    struct in6_addr rtmsg_src;
    struct in6_addr rtmsg_gateway;
    uint32_t rtmsg_type;
    uint16_t rtmsg_dst_len;
    uint16_t rtmsg_src_len;
    uint32_t rtmsg_metric;
    unsigned long int rtmsg_info;
    uint32_t rtmsg_flags;
    int rtmsg_ifindex;
  };

#define	RTF_UP		0x0001		/* Route usable.  */
#define	RTF_GATEWAY	0x0002		/* Destination is a gateway.  */

#define	RTF_HOST	0x0004		/* Host entry (net otherwise).  */
#define RTF_REINSTATE	0x0008		/* Reinstate route after timeout.  */
#define	RTF_DYNAMIC	0x0010		/* Created dyn. (by redirect).  */
#define	RTF_MODIFIED	0x0020		/* Modified dyn. (by redirect).  */
#define RTF_MTU		0x0040		/* Specific MTU for this route.  */
#define RTF_MSS		RTF_MTU		/* Compatibility.  */
#define RTF_WINDOW	0x0080		/* Per route window clamping.  */
#define RTF_IRTT	0x0100		/* Initial round trip time.  */
#define RTF_REJECT	0x0200		/* Reject route.  */
#define	RTF_STATIC	0x0400		/* Manually injected route.  */
#define	RTF_XRESOLVE	0x0800		/* External resolver.  */
#define RTF_NOFORWARD   0x1000		/* Forwarding inhibited.  */
#define RTF_THROW	0x2000		/* Go to next class.  */
#define RTF_NOPMTUDISC  0x4000		/* Do not send packets with DF.  */

/* for IPv6 */
#define RTF_DEFAULT	0x00010000	/* default - learned via ND	*/
#define RTF_ALLONLINK	0x00020000	/* fallback, no routers on link	*/
#define RTF_ADDRCONF	0x00040000	/* addrconf route - RA		*/

#define RTF_LINKRT	0x00100000	/* link specific - device match	*/
#define RTF_NONEXTHOP	0x00200000	/* route with no nexthop	*/

#define RTF_CACHE	0x01000000	/* cache entry			*/
#define RTF_FLOW	0x02000000	/* flow significant route	*/
#define RTF_POLICY	0x04000000	/* policy route			*/

#define RTCF_VALVE	0x00200000
#define RTCF_MASQ	0x00400000
#define RTCF_NAT	0x00800000
#define RTCF_DOREDIRECT 0x01000000
#define RTCF_LOG	0x02000000
#define RTCF_DIRECTSRC	0x04000000

#define RTF_LOCAL	0x80000000
#define RTF_INTERFACE	0x40000000
#define RTF_MULTICAST	0x20000000
#define RTF_BROADCAST	0x10000000
#define RTF_NAT		0x08000000

#define RTF_ADDRCLASSMASK	0xF8000000
#define RT_ADDRCLASS(flags)	((uint32_t) flags >> 23)

#define RT_TOS(tos)		((tos) & IPTOS_TOS_MASK)

#define RT_LOCALADDR(flags)	((flags & RTF_ADDRCLASSMASK) \
				 == (RTF_LOCAL|RTF_INTERFACE))

#define RT_CLASS_UNSPEC		0
#define RT_CLASS_DEFAULT	253

#define RT_CLASS_MAIN		254
#define RT_CLASS_LOCAL		255
#define RT_CLASS_MAX		255

#define RTMSG_ACK		NLMSG_ACK
#define RTMSG_OVERRUN		NLMSG_OVERRUN

#define RTMSG_NEWDEVICE		0x11
#define RTMSG_DELDEVICE		0x12
#define RTMSG_NEWROUTE		0x21
#define RTMSG_DELROUTE		0x22
#define RTMSG_NEWRULE		0x31
#define RTMSG_DELRULE		0x32
#define RTMSG_CONTROL		0x40

#define RTMSG_AR_FAILED		0x51	/* Address Resolution failed.  */

#endif /* net/route.h */

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