1 /*
2 * Copyright (C) 2018 Vmware
3 * Vishal Dhingra
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the Free
7 * Software Foundation; either version 2 of the License, or (at your option)
8 * any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; see the file COPYING; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include "northbound.h"
21 #include "libfrr.h"
22 #include "vrf.h"
23 #include "lib_errors.h"
24 #include "routing_nb.h"
25
26
27 DEFINE_HOOK(routing_conf_event, (struct nb_cb_create_args *args), (args))
28
29 /*
30 * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol
31 */
32
routing_control_plane_protocols_control_plane_protocol_create(struct nb_cb_create_args * args)33 int routing_control_plane_protocols_control_plane_protocol_create(
34 struct nb_cb_create_args *args)
35 {
36 struct vrf *vrf;
37 const char *vrfname;
38
39 switch (args->event) {
40 case NB_EV_VALIDATE:
41 if (hook_call(routing_conf_event, args))
42 return NB_ERR_VALIDATION;
43 break;
44 case NB_EV_PREPARE:
45 case NB_EV_ABORT:
46 break;
47 case NB_EV_APPLY:
48 /*
49 * If the daemon relies on the VRF pointer stored in this
50 * dnode, then it should register the dependency between this
51 * module and the VRF module using
52 * routing_control_plane_protocols_register_vrf_dependency.
53 * If such dependency is not registered, then nothing is
54 * stored in the dnode. If the dependency is registered,
55 * find the vrf and store the pointer.
56 */
57 if (nb_node_has_dependency(args->dnode->schema->priv)) {
58 vrfname = yang_dnode_get_string(args->dnode, "./vrf");
59 vrf = vrf_lookup_by_name(vrfname);
60 assert(vrf);
61 nb_running_set_entry(args->dnode, vrf);
62 }
63 break;
64 };
65
66 return NB_OK;
67 }
68
routing_control_plane_protocols_control_plane_protocol_destroy(struct nb_cb_destroy_args * args)69 int routing_control_plane_protocols_control_plane_protocol_destroy(
70 struct nb_cb_destroy_args *args)
71 {
72 if (args->event != NB_EV_APPLY)
73 return NB_OK;
74
75 /*
76 * If dependency on VRF module is registered, then VRF
77 * pointer was stored and must be cleared.
78 */
79 if (nb_node_has_dependency(args->dnode->schema->priv))
80 nb_running_unset_entry(args->dnode);
81
82 return NB_OK;
83 }
84
vrf_to_control_plane_protocol(const struct lyd_node * dnode,char * xpath)85 static void vrf_to_control_plane_protocol(const struct lyd_node *dnode,
86 char *xpath)
87 {
88 const char *vrf;
89
90 vrf = yang_dnode_get_string(dnode, "./name");
91
92 snprintf(xpath, XPATH_MAXLEN, FRR_ROUTING_KEY_XPATH_VRF, vrf);
93 }
94
control_plane_protocol_to_vrf(const struct lyd_node * dnode,char * xpath)95 static void control_plane_protocol_to_vrf(const struct lyd_node *dnode,
96 char *xpath)
97 {
98 const char *vrf;
99
100 vrf = yang_dnode_get_string(dnode, "./vrf");
101
102 snprintf(xpath, XPATH_MAXLEN, FRR_VRF_KEY_XPATH, vrf);
103 }
104
routing_control_plane_protocols_register_vrf_dependency(void)105 void routing_control_plane_protocols_register_vrf_dependency(void)
106 {
107 struct nb_dependency_callbacks cbs;
108
109 cbs.get_dependant_xpath = vrf_to_control_plane_protocol;
110 cbs.get_dependency_xpath = control_plane_protocol_to_vrf;
111
112 nb_node_set_dependency_cbs(FRR_VRF_XPATH, FRR_ROUTING_XPATH, &cbs);
113 }
114