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718e3744 | 1 | /* |
2 | * RIPng routes function. | |
3 | * Copyright (C) 1998 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "prefix.h" | |
26 | #include "table.h" | |
27 | #include "memory.h" | |
28 | #include "if.h" | |
a94434b6 | 29 | #include "vty.h" |
718e3744 | 30 | |
31 | #include "ripngd/ripngd.h" | |
32 | #include "ripngd/ripng_route.h" | |
33 | ||
6ac29a51 | 34 | static struct ripng_aggregate * |
35dece84 | 35 | ripng_aggregate_new (void) |
718e3744 | 36 | { |
37 | struct ripng_aggregate *new; | |
38 | ||
39 | new = XCALLOC (MTYPE_RIPNG_AGGREGATE, sizeof (struct ripng_aggregate)); | |
40 | return new; | |
41 | } | |
42 | ||
6ac29a51 | 43 | static void |
718e3744 | 44 | ripng_aggregate_free (struct ripng_aggregate *aggregate) |
45 | { | |
46 | XFREE (MTYPE_RIPNG_AGGREGATE, aggregate); | |
47 | } | |
48 | ||
49 | /* Aggregate count increment check. */ | |
50 | void | |
51 | ripng_aggregate_increment (struct route_node *child, struct ripng_info *rinfo) | |
52 | { | |
53 | struct route_node *np; | |
54 | struct ripng_aggregate *aggregate; | |
55 | ||
56 | for (np = child; np; np = np->parent) | |
57 | if ((aggregate = np->aggregate) != NULL) | |
58 | { | |
59 | aggregate->count++; | |
60 | rinfo->suppress++; | |
61 | } | |
62 | } | |
63 | ||
64 | /* Aggregate count decrement check. */ | |
65 | void | |
66 | ripng_aggregate_decrement (struct route_node *child, struct ripng_info *rinfo) | |
67 | { | |
68 | struct route_node *np; | |
69 | struct ripng_aggregate *aggregate; | |
70 | ||
71 | for (np = child; np; np = np->parent) | |
72 | if ((aggregate = np->aggregate) != NULL) | |
73 | { | |
74 | aggregate->count--; | |
75 | rinfo->suppress--; | |
76 | } | |
77 | } | |
78 | ||
79 | /* RIPng routes treatment. */ | |
80 | int | |
81 | ripng_aggregate_add (struct prefix *p) | |
82 | { | |
83 | struct route_node *top; | |
84 | struct route_node *rp; | |
85 | struct ripng_info *rinfo; | |
86 | struct ripng_aggregate *aggregate; | |
87 | struct ripng_aggregate *sub; | |
88 | ||
89 | /* Get top node for aggregation. */ | |
90 | top = route_node_get (ripng->table, p); | |
91 | ||
92 | /* Allocate new aggregate. */ | |
93 | aggregate = ripng_aggregate_new (); | |
94 | aggregate->metric = 1; | |
95 | ||
96 | top->aggregate = aggregate; | |
97 | ||
98 | /* Suppress routes match to the aggregate. */ | |
99 | for (rp = route_lock_node (top); rp; rp = route_next_until (rp, top)) | |
100 | { | |
101 | /* Suppress normal route. */ | |
102 | if ((rinfo = rp->info) != NULL) | |
103 | { | |
104 | aggregate->count++; | |
105 | rinfo->suppress++; | |
106 | } | |
107 | /* Suppress aggregate route. This may not need. */ | |
108 | if (rp != top && (sub = rp->aggregate) != NULL) | |
109 | { | |
110 | aggregate->count++; | |
111 | sub->suppress++; | |
112 | } | |
113 | } | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | /* Delete RIPng static route. */ | |
119 | int | |
120 | ripng_aggregate_delete (struct prefix *p) | |
121 | { | |
122 | struct route_node *top; | |
123 | struct route_node *rp; | |
124 | struct ripng_info *rinfo; | |
125 | struct ripng_aggregate *aggregate; | |
126 | struct ripng_aggregate *sub; | |
127 | ||
128 | /* Get top node for aggregation. */ | |
129 | top = route_node_get (ripng->table, p); | |
130 | ||
131 | /* Allocate new aggregate. */ | |
132 | aggregate = top->aggregate; | |
133 | ||
134 | /* Suppress routes match to the aggregate. */ | |
135 | for (rp = route_lock_node (top); rp; rp = route_next_until (rp, top)) | |
136 | { | |
137 | /* Suppress normal route. */ | |
138 | if ((rinfo = rp->info) != NULL) | |
139 | { | |
140 | aggregate->count--; | |
141 | rinfo->suppress--; | |
142 | } | |
143 | ||
144 | if (rp != top && (sub = rp->aggregate) != NULL) | |
145 | { | |
146 | aggregate->count--; | |
147 | sub->suppress--; | |
148 | } | |
149 | } | |
150 | ||
151 | top->aggregate = NULL; | |
152 | ripng_aggregate_free (aggregate); | |
153 | ||
154 | route_unlock_node (top); | |
155 | route_unlock_node (top); | |
156 | ||
157 | return 0; | |
158 | } |