1 /* RIP offset-list
2 * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <zebra.h>
22
23 #include "if.h"
24 #include "prefix.h"
25 #include "filter.h"
26 #include "command.h"
27 #include "linklist.h"
28 #include "memory.h"
29
30 #include "ripd/ripd.h"
31
32 DEFINE_MTYPE_STATIC(RIPD, RIP_OFFSET_LIST, "RIP offset list")
33
34 #define OFFSET_LIST_IN_NAME(O) ((O)->direct[RIP_OFFSET_LIST_IN].alist_name)
35 #define OFFSET_LIST_IN_METRIC(O) ((O)->direct[RIP_OFFSET_LIST_IN].metric)
36
37 #define OFFSET_LIST_OUT_NAME(O) ((O)->direct[RIP_OFFSET_LIST_OUT].alist_name)
38 #define OFFSET_LIST_OUT_METRIC(O) ((O)->direct[RIP_OFFSET_LIST_OUT].metric)
39
rip_offset_list_new(struct rip * rip,const char * ifname)40 struct rip_offset_list *rip_offset_list_new(struct rip *rip, const char *ifname)
41 {
42 struct rip_offset_list *offset;
43
44 offset = XCALLOC(MTYPE_RIP_OFFSET_LIST, sizeof(struct rip_offset_list));
45 offset->rip = rip;
46 offset->ifname = strdup(ifname);
47 listnode_add_sort(rip->offset_list_master, offset);
48
49 return offset;
50 }
51
offset_list_del(struct rip_offset_list * offset)52 void offset_list_del(struct rip_offset_list *offset)
53 {
54 listnode_delete(offset->rip->offset_list_master, offset);
55 offset_list_free(offset);
56 }
57
offset_list_free(struct rip_offset_list * offset)58 void offset_list_free(struct rip_offset_list *offset)
59 {
60 if (OFFSET_LIST_IN_NAME(offset))
61 free(OFFSET_LIST_IN_NAME(offset));
62 if (OFFSET_LIST_OUT_NAME(offset))
63 free(OFFSET_LIST_OUT_NAME(offset));
64 free(offset->ifname);
65 XFREE(MTYPE_RIP_OFFSET_LIST, offset);
66 }
67
rip_offset_list_lookup(struct rip * rip,const char * ifname)68 struct rip_offset_list *rip_offset_list_lookup(struct rip *rip,
69 const char *ifname)
70 {
71 struct rip_offset_list *offset;
72 struct listnode *node, *nnode;
73
74 for (ALL_LIST_ELEMENTS(rip->offset_list_master, node, nnode, offset)) {
75 if (strcmp(offset->ifname, ifname) == 0)
76 return offset;
77 }
78 return NULL;
79 }
80
81 /* If metric is modifed return 1. */
rip_offset_list_apply_in(struct prefix_ipv4 * p,struct interface * ifp,uint32_t * metric)82 int rip_offset_list_apply_in(struct prefix_ipv4 *p, struct interface *ifp,
83 uint32_t *metric)
84 {
85 struct rip_interface *ri = ifp->info;
86 struct rip_offset_list *offset;
87 struct access_list *alist;
88
89 /* Look up offset-list with interface name. */
90 offset = rip_offset_list_lookup(ri->rip, ifp->name);
91 if (offset && OFFSET_LIST_IN_NAME(offset)) {
92 alist = access_list_lookup(AFI_IP, OFFSET_LIST_IN_NAME(offset));
93
94 if (alist
95 && access_list_apply(alist, (struct prefix *)p)
96 == FILTER_PERMIT) {
97 *metric += OFFSET_LIST_IN_METRIC(offset);
98 return 1;
99 }
100 return 0;
101 }
102 /* Look up offset-list without interface name. */
103 offset = rip_offset_list_lookup(ri->rip, "*");
104 if (offset && OFFSET_LIST_IN_NAME(offset)) {
105 alist = access_list_lookup(AFI_IP, OFFSET_LIST_IN_NAME(offset));
106
107 if (alist
108 && access_list_apply(alist, (struct prefix *)p)
109 == FILTER_PERMIT) {
110 *metric += OFFSET_LIST_IN_METRIC(offset);
111 return 1;
112 }
113 return 0;
114 }
115 return 0;
116 }
117
118 /* If metric is modifed return 1. */
rip_offset_list_apply_out(struct prefix_ipv4 * p,struct interface * ifp,uint32_t * metric)119 int rip_offset_list_apply_out(struct prefix_ipv4 *p, struct interface *ifp,
120 uint32_t *metric)
121 {
122 struct rip_interface *ri = ifp->info;
123 struct rip_offset_list *offset;
124 struct access_list *alist;
125
126 /* Look up offset-list with interface name. */
127 offset = rip_offset_list_lookup(ri->rip, ifp->name);
128 if (offset && OFFSET_LIST_OUT_NAME(offset)) {
129 alist = access_list_lookup(AFI_IP,
130 OFFSET_LIST_OUT_NAME(offset));
131
132 if (alist
133 && access_list_apply(alist, (struct prefix *)p)
134 == FILTER_PERMIT) {
135 *metric += OFFSET_LIST_OUT_METRIC(offset);
136 return 1;
137 }
138 return 0;
139 }
140
141 /* Look up offset-list without interface name. */
142 offset = rip_offset_list_lookup(ri->rip, "*");
143 if (offset && OFFSET_LIST_OUT_NAME(offset)) {
144 alist = access_list_lookup(AFI_IP,
145 OFFSET_LIST_OUT_NAME(offset));
146
147 if (alist
148 && access_list_apply(alist, (struct prefix *)p)
149 == FILTER_PERMIT) {
150 *metric += OFFSET_LIST_OUT_METRIC(offset);
151 return 1;
152 }
153 return 0;
154 }
155 return 0;
156 }
157
offset_list_cmp(struct rip_offset_list * o1,struct rip_offset_list * o2)158 int offset_list_cmp(struct rip_offset_list *o1, struct rip_offset_list *o2)
159 {
160 return strcmp(o1->ifname, o2->ifname);
161 }
162