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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <netinet/in.h>
#include <linux/if.h>
#include "netlink-util.h"
#include "networkd-ipv6-proxy-ndp.h"
#include "networkd-link.h"
#include "networkd-manager.h"
#include "networkd-network.h"
#include "networkd-queue.h"
#include "socket-util.h"
#include "string-util.h"
void network_adjust_ipv6_proxy_ndp(Network *network) {
assert(network);
if (set_isempty(network->ipv6_proxy_ndp_addresses))
return;
if (!socket_ipv6_is_supported()) {
log_once(LOG_WARNING,
"%s: IPv6 proxy NDP addresses are set, but IPv6 is not supported by kernel, "
"Ignoring IPv6 proxy NDP addresses.", network->filename);
network->ipv6_proxy_ndp_addresses = set_free_free(network->ipv6_proxy_ndp_addresses);
}
}
static int ipv6_proxy_ndp_address_configure_handler(
sd_netlink *rtnl,
sd_netlink_message *m,
Request *req,
Link *link,
struct in6_addr *address) {
int r;
assert(m);
assert(link);
r = sd_netlink_message_get_errno(m);
if (r < 0)
log_link_message_warning_errno(link, m, r, "Could not add IPv6 proxy ndp address entry, ignoring");
if (link->static_ipv6_proxy_ndp_messages == 0) {
log_link_debug(link, "IPv6 proxy NDP addresses set.");
link->static_ipv6_proxy_ndp_configured = true;
link_check_ready(link);
}
return 1;
}
/* send a request to the kernel to add an IPv6 Proxy entry to the neighbour table */
static int ipv6_proxy_ndp_address_configure(const struct in6_addr *address, Link *link, Request *req) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
int r;
assert(address);
assert(link);
assert(link->manager);
assert(link->manager->rtnl);
assert(req);
/* create new netlink message */
r = sd_rtnl_message_new_neigh(link->manager->rtnl, &m, RTM_NEWNEIGH, link->ifindex, AF_INET6);
if (r < 0)
return r;
r = sd_rtnl_message_neigh_set_flags(m, NTF_PROXY);
if (r < 0)
return r;
r = sd_netlink_message_append_in6_addr(m, NDA_DST, address);
if (r < 0)
return r;
return request_call_netlink_async(link->manager->rtnl, m, req);
}
static int ipv6_proxy_ndp_address_process_request(Request *req, Link *link, struct in6_addr *address) {
int r;
assert(req);
assert(link);
assert(address);
if (!link_is_ready_to_configure(link, false))
return 0;
r = ipv6_proxy_ndp_address_configure(address, link, req);
if (r < 0)
return log_link_warning_errno(link, r, "Failed to configure IPv6 proxy NDP address: %m");
return 1;
}
int link_request_static_ipv6_proxy_ndp_addresses(Link *link) {
struct in6_addr *address;
int r;
assert(link);
assert(link->network);
link->static_ipv6_proxy_ndp_configured = false;
SET_FOREACH(address, link->network->ipv6_proxy_ndp_addresses) {
r = link_queue_request_safe(link, REQUEST_TYPE_IPV6_PROXY_NDP,
address, NULL,
in6_addr_hash_func,
in6_addr_compare_func,
ipv6_proxy_ndp_address_process_request,
&link->static_ipv6_proxy_ndp_messages,
ipv6_proxy_ndp_address_configure_handler,
NULL);
if (r < 0)
return log_link_warning_errno(link, r, "Failed to request IPv6 proxy NDP address: %m");
}
if (link->static_ipv6_proxy_ndp_messages == 0) {
link->static_ipv6_proxy_ndp_configured = true;
link_check_ready(link);
} else {
log_link_debug(link, "Setting IPv6 proxy NDP addresses.");
link_set_state(link, LINK_STATE_CONFIGURING);
}
return 0;
}
int config_parse_ipv6_proxy_ndp_address(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
_cleanup_free_ struct in6_addr *address = NULL;
Network *network = ASSERT_PTR(userdata);
union in_addr_union buffer;
int r;
assert(filename);
assert(rvalue);
if (isempty(rvalue)) {
network->ipv6_proxy_ndp_addresses = set_free_free(network->ipv6_proxy_ndp_addresses);
return 0;
}
r = in_addr_from_string(AF_INET6, rvalue, &buffer);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse IPv6 proxy NDP address, ignoring: %s", rvalue);
return 0;
}
if (in_addr_is_null(AF_INET6, &buffer)) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"IPv6 proxy NDP address cannot be the ANY address, ignoring: %s", rvalue);
return 0;
}
address = newdup(struct in6_addr, &buffer.in6, 1);
if (!address)
return log_oom();
r = set_ensure_put(&network->ipv6_proxy_ndp_addresses, &in6_addr_hash_ops, address);
if (r < 0)
return log_oom();
if (r > 0)
TAKE_PTR(address);
return 0;
}
|
