1 /* Copyright (C) 1997-2021 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 Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the 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 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 /* Based on the 4.4BSD and Linux version of this file. */ 19 20 #ifndef _NET_ROUTE_H 21 22 #define _NET_ROUTE_H 1 23 #include <features.h> 24 25 #include <sys/socket.h> 26 #include <sys/types.h> 27 #include <netinet/in.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 struct in6_rtmsg 54 { 55 struct in6_addr rtmsg_dst; 56 struct in6_addr rtmsg_src; 57 struct in6_addr rtmsg_gateway; 58 uint32_t rtmsg_type; 59 uint16_t rtmsg_dst_len; 60 uint16_t rtmsg_src_len; 61 uint32_t rtmsg_metric; 62 unsigned long int rtmsg_info; 63 uint32_t rtmsg_flags; 64 int rtmsg_ifindex; 65 }; 66 67 68 #define RTF_UP 0x0001 /* Route usable. */ 69 #define RTF_GATEWAY 0x0002 /* Destination is a gateway. */ 70 71 #define RTF_HOST 0x0004 /* Host entry (net otherwise). */ 72 #define RTF_REINSTATE 0x0008 /* Reinstate route after timeout. */ 73 #define RTF_DYNAMIC 0x0010 /* Created dyn. (by redirect). */ 74 #define RTF_MODIFIED 0x0020 /* Modified dyn. (by redirect). */ 75 #define RTF_MTU 0x0040 /* Specific MTU for this route. */ 76 #define RTF_MSS RTF_MTU /* Compatibility. */ 77 #define RTF_WINDOW 0x0080 /* Per route window clamping. */ 78 #define RTF_IRTT 0x0100 /* Initial round trip time. */ 79 #define RTF_REJECT 0x0200 /* Reject route. */ 80 #define RTF_STATIC 0x0400 /* Manually injected route. */ 81 #define RTF_XRESOLVE 0x0800 /* External resolver. */ 82 #define RTF_NOFORWARD 0x1000 /* Forwarding inhibited. */ 83 #define RTF_THROW 0x2000 /* Go to next class. */ 84 #define RTF_NOPMTUDISC 0x4000 /* Do not send packets with DF. */ 85 86 /* for IPv6 */ 87 #define RTF_DEFAULT 0x00010000 /* default - learned via ND */ 88 #define RTF_ALLONLINK 0x00020000 /* fallback, no routers on link */ 89 #define RTF_ADDRCONF 0x00040000 /* addrconf route - RA */ 90 91 #define RTF_LINKRT 0x00100000 /* link specific - device match */ 92 #define RTF_NONEXTHOP 0x00200000 /* route with no nexthop */ 93 94 #define RTF_CACHE 0x01000000 /* cache entry */ 95 #define RTF_FLOW 0x02000000 /* flow significant route */ 96 #define RTF_POLICY 0x04000000 /* policy route */ 97 98 #define RTCF_VALVE 0x00200000 99 #define RTCF_MASQ 0x00400000 100 #define RTCF_NAT 0x00800000 101 #define RTCF_DOREDIRECT 0x01000000 102 #define RTCF_LOG 0x02000000 103 #define RTCF_DIRECTSRC 0x04000000 104 105 #define RTF_LOCAL 0x80000000 106 #define RTF_INTERFACE 0x40000000 107 #define RTF_MULTICAST 0x20000000 108 #define RTF_BROADCAST 0x10000000 109 #define RTF_NAT 0x08000000 110 111 #define RTF_ADDRCLASSMASK 0xF8000000 112 #define RT_ADDRCLASS(flags) ((uint32_t) flags >> 23) 113 114 #define RT_TOS(tos) ((tos) & IPTOS_TOS_MASK) 115 116 #define RT_LOCALADDR(flags) ((flags & RTF_ADDRCLASSMASK) \ 117 == (RTF_LOCAL|RTF_INTERFACE)) 118 119 #define RT_CLASS_UNSPEC 0 120 #define RT_CLASS_DEFAULT 253 121 122 #define RT_CLASS_MAIN 254 123 #define RT_CLASS_LOCAL 255 124 #define RT_CLASS_MAX 255 125 126 127 #define RTMSG_ACK NLMSG_ACK 128 #define RTMSG_OVERRUN NLMSG_OVERRUN 129 130 #define RTMSG_NEWDEVICE 0x11 131 #define RTMSG_DELDEVICE 0x12 132 #define RTMSG_NEWROUTE 0x21 133 #define RTMSG_DELROUTE 0x22 134 #define RTMSG_NEWRULE 0x31 135 #define RTMSG_DELRULE 0x32 136 #define RTMSG_CONTROL 0x40 137 138 #define RTMSG_AR_FAILED 0x51 /* Address Resolution failed. */ 139 140 #endif /* net/route.h */ 141