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04473969 PF |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright (C) 2017 Intel Corporation. All rights reserved. | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd 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 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <netinet/icmp6.h> | |
21 | #include <netinet/in.h> | |
22 | ||
23 | #include "sd-radv.h" | |
24 | ||
25 | #include "alloc-util.h" | |
26 | #include "fd-util.h" | |
27 | #include "icmp6-util.h" | |
28 | #include "in-addr-util.h" | |
29 | #include "radv-internal.h" | |
30 | #include "socket-util.h" | |
31 | #include "string-util.h" | |
32 | #include "util.h" | |
33 | ||
34 | _public_ int sd_radv_prefix_new(sd_radv_prefix **ret) { | |
35 | _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL; | |
36 | ||
37 | assert_return(ret, -EINVAL); | |
38 | ||
39 | p = new0(sd_radv_prefix, 1); | |
40 | if (!p) | |
41 | return -ENOMEM; | |
42 | ||
43 | p->n_ref = 1; | |
44 | ||
45 | p->opt.type = ND_OPT_PREFIX_INFORMATION; | |
46 | p->opt.length = (sizeof(p->opt) - 1) /8 + 1; | |
47 | ||
48 | p->opt.prefixlen = 64; | |
49 | ||
50 | /* RFC 4861, Section 6.2.1 */ | |
51 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, true); | |
52 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, true); | |
53 | p->opt.preferred_lifetime = htobe32(604800); | |
54 | p->opt.valid_lifetime = htobe32(2592000); | |
55 | ||
56 | *ret = p; | |
57 | p = NULL; | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | _public_ sd_radv_prefix *sd_radv_prefix_ref(sd_radv_prefix *p) { | |
63 | if (!p) | |
64 | return NULL; | |
65 | ||
66 | assert(p->n_ref > 0); | |
67 | p->n_ref++; | |
68 | ||
69 | return p; | |
70 | } | |
71 | ||
72 | _public_ sd_radv_prefix *sd_radv_prefix_unref(sd_radv_prefix *p) { | |
73 | if (!p) | |
74 | return NULL; | |
75 | ||
76 | assert(p->n_ref > 0); | |
77 | p->n_ref--; | |
78 | ||
79 | if (p->n_ref > 0) | |
80 | return NULL; | |
81 | ||
82 | return mfree(p); | |
83 | } | |
84 | ||
85 | _public_ int sd_radv_prefix_set_prefix(sd_radv_prefix *p, struct in6_addr *in6_addr, | |
86 | unsigned char prefixlen) { | |
87 | assert_return(p, -EINVAL); | |
88 | assert_return(in6_addr, -EINVAL); | |
89 | ||
90 | if (prefixlen < 3 || prefixlen > 128) | |
91 | return -EINVAL; | |
92 | ||
93 | if (prefixlen > 64) | |
94 | /* unusual but allowed, log it */ | |
95 | log_radv("Unusual prefix length %d greater than 64", prefixlen); | |
96 | ||
97 | p->opt.in6_addr = *in6_addr; | |
98 | p->opt.prefixlen = prefixlen; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | _public_ int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) { | |
104 | assert_return(p, -EINVAL); | |
105 | ||
106 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | _public_ int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p, | |
112 | int address_autoconfiguration) { | |
113 | assert_return(p, -EINVAL); | |
114 | ||
115 | SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration); | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | _public_ int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p, | |
121 | uint32_t valid_lifetime) { | |
122 | assert_return(p, -EINVAL); | |
123 | ||
124 | p->opt.valid_lifetime = htobe32(valid_lifetime); | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | _public_ int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p, | |
130 | uint32_t preferred_lifetime) { | |
131 | assert_return(p, -EINVAL); | |
132 | ||
133 | p->opt.preferred_lifetime = htobe32(preferred_lifetime); | |
134 | ||
135 | return 0; | |
136 | } |