sysdeps/unix/sysv/linux/net/route.h

   1 /* Copyright (C) 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /* Based on the 4.4BSD and Linux version of this file.  */
  20
  21 #ifndef _NET_ROUTE_H
  22
  23 #define _NET_ROUTE_H    1
  24 #include <features.h>
  25
  26 #include <sys/socket.h>
  27 #include <sys/types.h>
  28
  29
  30 /* This structure gets passed by the SIOCADDRT and SIOCDELRT calls. */
  31 struct rtentry
  32   {
  33     unsigned long int rt_pad1;
  34     struct sockaddr rt_dst;             /* Target address.  */
  35     struct sockaddr rt_gateway;         /* Gateway addr (RTF_GATEWAY).  */
  36     struct sockaddr rt_genmask;         /* Target network mask (IP).  */
  37     unsigned short int rt_flags;
  38     short int rt_pad2;
  39     unsigned long int rt_pad3;
  40     unsigned char rt_tos;
  41     unsigned char rt_class;
  42     short int rt_pad4;
  43     short int rt_metric;                /* +1 for binary compatibility!  */
  44     char *rt_dev;                       /* Forcing the device at add.  */
  45     unsigned long int rt_mtu;           /* Per route MTU/Window.  */
  46     unsigned long int rt_window;        /* Window clamping.  */
  47     unsigned short int rt_irtt;         /* Initial RTT.  */
  48   };
  49 /* Compatibility hack.  */
  50 #define rt_mss  rt_mtu
  51
  52
  53 #define RTF_UP          0x0001          /* Route usable.  */
  54 #define RTF_GATEWAY     0x0002          /* Destination is a gateway.  */
  55
  56 #define RTF_HOST        0x0004          /* Host entry (net otherwise).  */
  57 #define RTF_REINSTATE   0x0008          /* Reinstate route after timeout.  */
  58 #define RTF_DYNAMIC     0x0010          /* Created dyn. (by redirect).  */
  59 #define RTF_MODIFIED    0x0020          /* Modified dyn. (by redirect).  */
  60 #define RTF_MTU         0x0040          /* Specific MTU for this route.  */
  61 #define RTF_MSS         RTF_MTU         /* Compatibility.  */
  62 #define RTF_WINDOW      0x0080          /* Per route window clamping.  */
  63 #define RTF_IRTT        0x0100          /* Initial round trip time.  */
  64 #define RTF_REJECT      0x0200          /* Reject route.  */
  65 #define RTF_STATIC      0x0400          /* Manually injected route.  */
  66 #define RTF_XRESOLVE    0x0800          /* External resolver.  */
  67 #define RTF_NOFORWARD   0x1000          /* Forwarding inhibited.  */
  68 #define RTF_THROW       0x2000          /* Go to next class.  */
  69 #define RTF_NOPMTUDISC  0x4000          /* Do not send packets with DF.  */
  70
  71 /* Bad idea. IPv6 should not use broken IPv4 interface.  */
  72
  73 #define RTF_ADDRCONF    0x0800          /* Announced on link prefix.  */
  74 #define RTF_INVALID     0x1000
  75 #define RTF_DCACHE      0x2000
  76 #define RTF_DEFAULT     0x4000          /* Route is a default route.  */
  77 #define RTF_NEXTHOP     0x8000          /* Non gateway route with nexthop.  */
  78
  79
  80 #define RTF_MAGIC       0x10000         /* Route added/deleted automatically,
  81                                            when interface changes its state. */
  82
  83 #define RTCF_VALVE      0x00200000
  84 #define RTCF_MASQ       0x00400000
  85 #define RTCF_NAT        0x00800000
  86 #define RTCF_DOREDIRECT 0x01000000
  87 #define RTCF_LOG        0x02000000
  88 #define RTCF_DIRECTSRC  0x04000000
  89
  90 #define RTF_LOCAL       0x80000000
  91 #define RTF_INTERFACE   0x40000000
  92 #define RTF_MULTICAST   0x20000000
  93 #define RTF_BROADCAST   0x10000000
  94 #define RTF_NAT         0x08000000
  95
  96 #define RTF_ADDRCLASSMASK       0xF8000000
  97 #define RT_ADDRCLASS(flags)     ((__u_int32_t) flags >> 23)
  98
  99 #define RT_TOS(tos)             ((tos) & IPTOS_TOS_MASK)
 100
 101 #define RT_LOCALADDR(flags)     ((flags & RTF_ADDRCLASSMASK) \
 102                                  == (RTF_LOCAL|RTF_INTERFACE))
 103
 104 #define RT_CLASS_UNSPEC         0
 105 #define RT_CLASS_DEFAULT        253
 106
 107 #define RT_CLASS_MAIN           254
 108 #define RT_CLASS_LOCAL          255
 109 #define RT_CLASS_MAX            255
 110
 111
 112 #define RTMSG_ACK               NLMSG_ACK
 113 #define RTMSG_OVERRUN           NLMSG_OVERRUN
 114
 115 #define RTMSG_NEWDEVICE         0x11
 116 #define RTMSG_DELDEVICE         0x12
 117 #define RTMSG_NEWROUTE          0x21
 118 #define RTMSG_DELROUTE          0x22
 119 #define RTMSG_NEWRULE           0x31
 120 #define RTMSG_DELRULE           0x32
 121 #define RTMSG_CONTROL           0x40
 122
 123 #define RTMSG_AR_FAILED         0x51    /* Address Resolution failed.  */
 124
 125 #endif /* net/route.h */