1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Static NHT code.
* Copyright (C) 2018 Cumulus Networks, Inc.
* Donald Sharp
*/
#include <zebra.h>
#include "prefix.h"
#include "table.h"
#include "vrf.h"
#include "nexthop.h"
#include "srcdest_table.h"
#include "static_vrf.h"
#include "static_routes.h"
#include "static_zebra.h"
#include "static_nht.h"
static void static_nht_update_path(struct static_path *pn, struct prefix *nhp,
uint32_t nh_num, vrf_id_t nh_vrf_id)
{
struct static_nexthop *nh;
bool route_changed = false;
frr_each(static_nexthop_list, &pn->nexthop_list, nh) {
if (nh->nh_vrf_id != nh_vrf_id)
continue;
if (nh->type != STATIC_IPV4_GATEWAY
&& nh->type != STATIC_IPV4_GATEWAY_IFNAME
&& nh->type != STATIC_IPV6_GATEWAY
&& nh->type != STATIC_IPV6_GATEWAY_IFNAME)
continue;
if (nhp->family == AF_INET
&& nhp->u.prefix4.s_addr == nh->addr.ipv4.s_addr)
nh->nh_valid = !!nh_num;
if (nhp->family == AF_INET6
&& memcmp(&nhp->u.prefix6, &nh->addr.ipv6, IPV6_MAX_BYTELEN)
== 0)
nh->nh_valid = !!nh_num;
if (nh->state == STATIC_START)
route_changed = true;
}
if (route_changed)
static_zebra_route_add(pn, true);
}
static void static_nht_update_safi(const struct prefix *sp, const struct prefix *ssrc_p,
struct prefix *nhp, uint32_t nh_num, afi_t afi, safi_t safi,
struct static_vrf *svrf, vrf_id_t nh_vrf_id)
{
struct route_table *stable;
struct route_node *rn;
struct static_path *pn;
struct static_route_info *si;
stable = static_vrf_static_table(afi, safi, svrf);
if (!stable)
return;
if (sp) {
rn = srcdest_rnode_lookup(stable, sp, (const struct prefix_ipv6 *)ssrc_p);
if (rn && rn->info) {
si = static_route_info_from_rnode(rn);
frr_each(static_path_list, &si->path_list, pn) {
static_nht_update_path(pn, nhp, nh_num,
nh_vrf_id);
}
route_unlock_node(rn);
}
return;
}
for (rn = route_top(stable); rn; rn = srcdest_route_next(rn)) {
si = static_route_info_from_rnode(rn);
if (!si)
continue;
frr_each(static_path_list, &si->path_list, pn) {
static_nht_update_path(pn, nhp, nh_num, nh_vrf_id);
}
}
}
void static_nht_update(const struct prefix *sp, const struct prefix *ssrc_p, struct prefix *nhp,
uint32_t nh_num, afi_t afi, safi_t safi, vrf_id_t nh_vrf_id)
{
struct static_vrf *svrf;
RB_FOREACH (svrf, svrf_name_head, &svrfs)
static_nht_update_safi(sp, ssrc_p, nhp, nh_num, afi, safi, svrf, nh_vrf_id);
}
static void static_nht_reset_start_safi(struct prefix *nhp, afi_t afi,
safi_t safi, struct static_vrf *svrf,
vrf_id_t nh_vrf_id)
{
struct route_table *stable;
struct static_nexthop *nh;
struct static_path *pn;
struct route_node *rn;
struct static_route_info *si;
stable = static_vrf_static_table(afi, safi, svrf);
if (!stable)
return;
for (rn = route_top(stable); rn; rn = srcdest_route_next(rn)) {
si = static_route_info_from_rnode(rn);
if (!si)
continue;
frr_each(static_path_list, &si->path_list, pn) {
frr_each(static_nexthop_list, &pn->nexthop_list, nh) {
if (nh->nh_vrf_id != nh_vrf_id)
continue;
if (nhp->family == AF_INET
&& nhp->u.prefix4.s_addr
!= nh->addr.ipv4.s_addr)
continue;
if (nhp->family == AF_INET6
&& memcmp(&nhp->u.prefix6, &nh->addr.ipv6,
16)
!= 0)
continue;
/*
* We've been told that a nexthop we
* depend on has changed in some manner,
* so reset the state machine to allow
* us to start over.
*/
nh->state = STATIC_START;
}
}
}
}
void static_nht_reset_start(struct prefix *nhp, afi_t afi, safi_t safi,
vrf_id_t nh_vrf_id)
{
struct static_vrf *svrf;
RB_FOREACH (svrf, svrf_name_head, &svrfs)
static_nht_reset_start_safi(nhp, afi, safi, svrf, nh_vrf_id);
}
static void static_nht_mark_state_safi(const struct prefix *sp, const struct prefix *ssrc_p,
afi_t afi, safi_t safi, struct vrf *vrf,
enum static_install_states state)
{
struct static_vrf *svrf;
struct route_table *stable;
struct route_node *rn;
struct static_nexthop *nh;
struct static_path *pn;
struct static_route_info *si;
svrf = vrf->info;
if (!svrf)
return;
stable = static_vrf_static_table(afi, safi, svrf);
if (!stable)
return;
rn = srcdest_rnode_lookup(stable, sp, (const struct prefix_ipv6 *)ssrc_p);
if (!rn)
return;
si = rn->info;
if (si) {
frr_each(static_path_list, &si->path_list, pn) {
frr_each(static_nexthop_list, &pn->nexthop_list, nh) {
nh->state = state;
}
}
}
route_unlock_node(rn);
}
void static_nht_mark_state(const struct prefix *sp, const struct prefix *ssrc_p, safi_t safi,
vrf_id_t vrf_id, enum static_install_states state)
{
struct vrf *vrf;
afi_t afi = AFI_IP;
if (sp->family == AF_INET6)
afi = AFI_IP6;
vrf = vrf_lookup_by_id(vrf_id);
if (!vrf || !vrf->info)
return;
static_nht_mark_state_safi(sp, ssrc_p, afi, safi, vrf, state);
}
|
