| Pradosh Mohapatra | 60cc959 | 2015-11-09 20:21:41 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Nexthop structure definition. |
| 3 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro |
| 4 | * Copyright (C) 2013 Cumulus Networks, Inc. |
| 5 | * |
| 6 | * This file is part of Quagga. |
| 7 | * |
| 8 | * Quagga is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2, or (at your option) any |
| 11 | * later version. |
| 12 | * |
| 13 | * Quagga is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with Quagga; see the file COPYING. If not, write to the Free |
| 20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 21 | * 02111-1307, USA. |
| 22 | */ |
| 23 | |
| 24 | #ifndef _LIB_NEXTHOP_H |
| 25 | #define _LIB_NEXTHOP_H |
| 26 | |
| 27 | #include "prefix.h" |
| 28 | |
| 29 | union g_addr { |
| 30 | struct in_addr ipv4; |
| 31 | #ifdef HAVE_IPV6 |
| 32 | struct in6_addr ipv6; |
| 33 | #endif /* HAVE_IPV6 */ |
| 34 | }; |
| 35 | |
| 36 | enum nexthop_types_t |
| 37 | { |
| 38 | NEXTHOP_TYPE_IFINDEX = 1, /* Directly connected. */ |
| 39 | NEXTHOP_TYPE_IFNAME, /* Interface route. */ |
| 40 | NEXTHOP_TYPE_IPV4, /* IPv4 nexthop. */ |
| 41 | NEXTHOP_TYPE_IPV4_IFINDEX, /* IPv4 nexthop with ifindex. */ |
| 42 | NEXTHOP_TYPE_IPV4_IFNAME, /* IPv4 nexthop with ifname. */ |
| 43 | NEXTHOP_TYPE_IPV6, /* IPv6 nexthop. */ |
| 44 | NEXTHOP_TYPE_IPV6_IFINDEX, /* IPv6 nexthop with ifindex. */ |
| 45 | NEXTHOP_TYPE_IPV6_IFNAME, /* IPv6 nexthop with ifname. */ |
| 46 | NEXTHOP_TYPE_BLACKHOLE, /* Null0 nexthop. */ |
| 47 | }; |
| 48 | |
| 49 | /* Nexthop structure. */ |
| 50 | struct nexthop |
| 51 | { |
| 52 | struct nexthop *next; |
| 53 | struct nexthop *prev; |
| 54 | |
| 55 | /* Interface index. */ |
| 56 | char *ifname; |
| 57 | ifindex_t ifindex; |
| 58 | |
| 59 | enum nexthop_types_t type; |
| 60 | |
| 61 | u_char flags; |
| 62 | #define NEXTHOP_FLAG_ACTIVE (1 << 0) /* This nexthop is alive. */ |
| 63 | #define NEXTHOP_FLAG_FIB (1 << 1) /* FIB nexthop. */ |
| 64 | #define NEXTHOP_FLAG_RECURSIVE (1 << 2) /* Recursive nexthop. */ |
| 65 | #define NEXTHOP_FLAG_ONLINK (1 << 3) /* Nexthop should be installed onlink. */ |
| 66 | #define NEXTHOP_FLAG_MATCHED (1 << 4) /* Already matched vs a nexthop */ |
| 67 | |
| 68 | /* Nexthop address */ |
| 69 | union g_addr gate; |
| 70 | union g_addr src; |
| 71 | |
| 72 | /* Nexthops obtained by recursive resolution. |
| 73 | * |
| 74 | * If the nexthop struct needs to be resolved recursively, |
| 75 | * NEXTHOP_FLAG_RECURSIVE will be set in flags and the nexthops |
| 76 | * obtained by recursive resolution will be added to `resolved'. |
| 77 | * Only one level of recursive resolution is currently supported. */ |
| 78 | struct nexthop *resolved; |
| 79 | }; |
| 80 | |
| 81 | struct nexthop *nexthop_new (void); |
| 82 | void nexthop_add (struct nexthop **target, struct nexthop *nexthop); |
| 83 | |
| 84 | void copy_nexthops (struct nexthop **tnh, struct nexthop *nh); |
| 85 | void nexthop_free (struct nexthop *nexthop); |
| 86 | void nexthops_free (struct nexthop *nexthop); |
| 87 | |
| 88 | extern const char *nexthop_type_to_str (enum nexthop_types_t nh_type); |
| 89 | extern int nexthop_same_no_recurse (struct nexthop *next1, struct nexthop *next2); |
| 90 | |
| 91 | #endif /*_LIB_NEXTHOP_H */ |