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fe8db0c5 TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | Copyright 2014 Tom Gundersen | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
23 | #include <unistd.h> | |
24 | #include <string.h> | |
25 | #include <errno.h> | |
26 | #include <sys/inotify.h> | |
27 | #include <sys/poll.h> | |
deb2e523 | 28 | #include <net/if.h> |
fe8db0c5 TG |
29 | |
30 | #include "util.h" | |
31 | #include "macro.h" | |
32 | #include "strv.h" | |
33 | #include "fileio.h" | |
34 | #include "sd-network.h" | |
7dbf94a9 | 35 | #include "network-internal.h" |
fe8db0c5 TG |
36 | #include "dhcp-lease-internal.h" |
37 | ||
6dcaa6f5 | 38 | _public_ int sd_network_get_link_state(int ifindex, char **state) { |
deb2e523 TG |
39 | _cleanup_free_ char *s = NULL, *p = NULL; |
40 | int r; | |
41 | ||
6dcaa6f5 | 42 | assert_return(ifindex > 0, -EINVAL); |
fe8db0c5 TG |
43 | assert_return(state, -EINVAL); |
44 | ||
6dcaa6f5 | 45 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
fe8db0c5 TG |
46 | return -ENOMEM; |
47 | ||
deb2e523 | 48 | r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL); |
cb6fa44c TG |
49 | if (r == -ENOENT) |
50 | return -ENODATA; | |
51 | else if (r < 0) | |
fe8db0c5 | 52 | return r; |
cb6fa44c | 53 | else if (!s) |
fe8db0c5 TG |
54 | return -EIO; |
55 | ||
560852ce | 56 | if (streq(s, "initializing")) |
deb2e523 TG |
57 | return -EBUSY; |
58 | ||
59 | *state = s; | |
60 | s = NULL; | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
bbf7c048 TG |
65 | _public_ int sd_network_get_operational_state(char **state) { |
66 | _cleanup_free_ char *s = NULL; | |
67 | int r; | |
68 | ||
69 | assert_return(state, -EINVAL); | |
70 | ||
85b5673b | 71 | r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE", |
bbf7c048 TG |
72 | &s, NULL); |
73 | if (r == -ENOENT) | |
74 | return -ENODATA; | |
75 | else if (r < 0) | |
76 | return r; | |
77 | else if (!s) | |
78 | return -EIO; | |
79 | ||
80 | *state = s; | |
81 | s = NULL; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
6dcaa6f5 | 86 | _public_ int sd_network_get_link_operational_state(int ifindex, char **state) { |
deb2e523 TG |
87 | _cleanup_free_ char *s = NULL, *p = NULL; |
88 | int r; | |
89 | ||
6dcaa6f5 | 90 | assert_return(ifindex > 0, -EINVAL); |
deb2e523 TG |
91 | assert_return(state, -EINVAL); |
92 | ||
6dcaa6f5 | 93 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
deb2e523 TG |
94 | return -ENOMEM; |
95 | ||
96 | r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL); | |
97 | if (r == -ENOENT) | |
98 | return -ENODATA; | |
99 | else if (r < 0) | |
100 | return r; | |
101 | else if (!s) | |
102 | return -EIO; | |
cb6fa44c | 103 | |
fe8db0c5 | 104 | *state = s; |
cb6fa44c TG |
105 | s = NULL; |
106 | ||
fe8db0c5 TG |
107 | return 0; |
108 | } | |
109 | ||
bd8f6538 TG |
110 | _public_ int sd_network_get_llmnr(int ifindex, char **llmnr) { |
111 | _cleanup_free_ char *s = NULL, *p = NULL; | |
112 | int r; | |
113 | ||
114 | assert_return(ifindex > 0, -EINVAL); | |
115 | assert_return(llmnr, -EINVAL); | |
116 | ||
117 | r = parse_env_file(p, NEWLINE, "LLMNR", &s, NULL); | |
118 | if (r == -ENOENT) | |
119 | return -ENODATA; | |
120 | else if (r < 0) | |
121 | return r; | |
122 | ||
123 | *llmnr = s; | |
124 | s = NULL; | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
6dcaa6f5 | 129 | _public_ int sd_network_get_dhcp_lease(int ifindex, sd_dhcp_lease **ret) { |
81d98a39 | 130 | _cleanup_free_ char *p = NULL, *s = NULL; |
68baa8fa | 131 | sd_dhcp_lease *lease = NULL; |
fe8db0c5 TG |
132 | int r; |
133 | ||
6dcaa6f5 | 134 | assert_return(ifindex > 0, -EINVAL); |
fe8db0c5 TG |
135 | assert_return(ret, -EINVAL); |
136 | ||
6dcaa6f5 | 137 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
fe8db0c5 TG |
138 | return -ENOMEM; |
139 | ||
140 | r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL); | |
fe8db0c5 | 141 | |
81d98a39 | 142 | if (r < 0) |
fe8db0c5 | 143 | return r; |
81d98a39 | 144 | else if (!s) |
fe8db0c5 TG |
145 | return -EIO; |
146 | ||
147 | r = dhcp_lease_load(s, &lease); | |
148 | if (r < 0) | |
149 | return r; | |
150 | ||
151 | *ret = lease; | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
6f4dedb2 | 156 | static int network_get_strv(const char *key, int ifindex, char ***ret) { |
7dbf94a9 | 157 | _cleanup_free_ char *p = NULL, *s = NULL; |
6f4dedb2 | 158 | _cleanup_strv_free_ char **a = NULL; |
7dbf94a9 TG |
159 | int r; |
160 | ||
6dcaa6f5 | 161 | assert_return(ifindex > 0, -EINVAL); |
6f4dedb2 | 162 | assert_return(ret, -EINVAL); |
7dbf94a9 | 163 | |
6dcaa6f5 | 164 | if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) |
7dbf94a9 TG |
165 | return -ENOMEM; |
166 | ||
bcb7a07e | 167 | r = parse_env_file(p, NEWLINE, key, &s, NULL); |
7dbf94a9 TG |
168 | if (r < 0) |
169 | return r; | |
6f4dedb2 TG |
170 | else if (!s) { |
171 | *ret = NULL; | |
7dbf94a9 | 172 | |
6f4dedb2 TG |
173 | return 0; |
174 | } | |
7dbf94a9 | 175 | |
6f4dedb2 TG |
176 | a = strv_split(s, " "); |
177 | if (!a) | |
7dbf94a9 TG |
178 | return -ENOMEM; |
179 | ||
6f4dedb2 TG |
180 | strv_uniq(a); |
181 | r = strv_length(a); | |
7dbf94a9 | 182 | |
6f4dedb2 TG |
183 | *ret = a; |
184 | a = NULL; | |
7dbf94a9 | 185 | |
6f4dedb2 | 186 | return r; |
7dbf94a9 TG |
187 | } |
188 | ||
6f4dedb2 TG |
189 | _public_ int sd_network_get_dns(int ifindex, char ***ret) { |
190 | return network_get_strv("DNS", ifindex, ret); | |
bcb7a07e TG |
191 | } |
192 | ||
6f4dedb2 TG |
193 | _public_ int sd_network_get_ntp(int ifindex, char ***ret) { |
194 | return network_get_strv("NTP", ifindex, ret); | |
bcb7a07e TG |
195 | } |
196 | ||
fe8db0c5 TG |
197 | static inline int MONITOR_TO_FD(sd_network_monitor *m) { |
198 | return (int) (unsigned long) m - 1; | |
199 | } | |
200 | ||
201 | static inline sd_network_monitor* FD_TO_MONITOR(int fd) { | |
202 | return (sd_network_monitor*) (unsigned long) (fd + 1); | |
203 | } | |
204 | ||
0014a4ad | 205 | _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) { |
fe8db0c5 TG |
206 | int fd, k; |
207 | bool good = false; | |
208 | ||
209 | assert_return(m, -EINVAL); | |
210 | ||
211 | fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); | |
212 | if (fd < 0) | |
213 | return -errno; | |
214 | ||
7e141e49 | 215 | if (!category || streq(category, "links")) { |
85b5673b | 216 | k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE); |
fe8db0c5 | 217 | if (k < 0) { |
03e334a1 | 218 | safe_close(fd); |
fe8db0c5 TG |
219 | return -errno; |
220 | } | |
221 | ||
222 | good = true; | |
223 | } | |
224 | ||
7e141e49 | 225 | if (!category || streq(category, "leases")) { |
85b5673b | 226 | k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE); |
7e141e49 TG |
227 | if (k < 0) { |
228 | safe_close(fd); | |
229 | return -errno; | |
230 | } | |
231 | ||
232 | good = true; | |
233 | } | |
234 | ||
fe8db0c5 TG |
235 | if (!good) { |
236 | close_nointr(fd); | |
237 | return -EINVAL; | |
238 | } | |
239 | ||
240 | *m = FD_TO_MONITOR(fd); | |
241 | return 0; | |
242 | } | |
243 | ||
244 | _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) { | |
245 | int fd; | |
246 | ||
247 | assert_return(m, NULL); | |
248 | ||
249 | fd = MONITOR_TO_FD(m); | |
250 | close_nointr(fd); | |
251 | ||
252 | return NULL; | |
253 | } | |
254 | ||
255 | _public_ int sd_network_monitor_flush(sd_network_monitor *m) { | |
256 | ||
257 | assert_return(m, -EINVAL); | |
258 | ||
259 | return flush_fd(MONITOR_TO_FD(m)); | |
260 | } | |
261 | ||
262 | _public_ int sd_network_monitor_get_fd(sd_network_monitor *m) { | |
263 | ||
264 | assert_return(m, -EINVAL); | |
265 | ||
266 | return MONITOR_TO_FD(m); | |
267 | } | |
268 | ||
269 | _public_ int sd_network_monitor_get_events(sd_network_monitor *m) { | |
270 | ||
271 | assert_return(m, -EINVAL); | |
272 | ||
273 | /* For now we will only return POLLIN here, since we don't | |
274 | * need anything else ever for inotify. However, let's have | |
275 | * this API to keep our options open should we later on need | |
276 | * it. */ | |
277 | return POLLIN; | |
278 | } | |
279 | ||
280 | _public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) { | |
281 | ||
282 | assert_return(m, -EINVAL); | |
283 | assert_return(timeout_usec, -EINVAL); | |
284 | ||
285 | /* For now we will only return (uint64_t) -1, since we don't | |
286 | * need any timeout. However, let's have this API to keep our | |
287 | * options open should we later on need it. */ | |
288 | *timeout_usec = (uint64_t) -1; | |
289 | return 0; | |
290 | } |