1 | /* |
1 | /* |
2 | util.C -- process management and other utility functions |
2 | util.C -- process management and other utility functions |
|
|
3 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
4 | Some of these are taken from tinc, see the AUTHORS file. |
5 | Some of these are taken from tinc, see the AUTHORS file. |
5 | |
6 | |
|
|
7 | This file is part of GVPE. |
|
|
8 | |
6 | This program is free software; you can redistribute it and/or modify |
9 | GVPE is free software; you can redistribute it and/or modify it |
7 | it under the terms of the GNU General Public License as published by |
10 | under the terms of the GNU General Public License as published by the |
8 | the Free Software Foundation; either version 2 of the License, or |
11 | Free Software Foundation; either version 3 of the License, or (at your |
9 | (at your option) any later version. |
12 | option) any later version. |
10 | |
13 | |
11 | This program is distributed in the hope that it will be useful, |
14 | This program is distributed in the hope that it will be useful, but |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
14 | GNU General Public License for more details. |
17 | Public License for more details. |
15 | |
18 | |
16 | You should have received a copy of the GNU General Public License |
19 | You should have received a copy of the GNU General Public License along |
17 | along with this program; if not, write to the Free Software |
20 | with this program; if not, see <http://www.gnu.org/licenses/>. |
18 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | |
|
|
22 | Additional permission under GNU GPL version 3 section 7 |
|
|
23 | |
|
|
24 | If you modify this Program, or any covered work, by linking or |
|
|
25 | combining it with the OpenSSL project's OpenSSL library (or a modified |
|
|
26 | version of that library), containing parts covered by the terms of the |
|
|
27 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
|
|
28 | additional permission to convey the resulting work. Corresponding |
|
|
29 | Source for a non-source form of such a combination shall include the |
|
|
30 | source code for the parts of OpenSSL used as well as that of the |
|
|
31 | covered work. |
19 | */ |
32 | */ |
20 | |
33 | |
21 | #include "config.h" |
34 | #include "config.h" |
22 | |
35 | |
23 | #include <cstdio> |
36 | #include <cstdio> |
|
|
37 | #include <cstdlib> |
24 | #include <cstring> |
38 | #include <cstring> |
25 | |
39 | |
26 | #include <errno.h> |
40 | #include <errno.h> |
27 | #include <signal.h> |
41 | #include <signal.h> |
28 | #include <sys/types.h> |
42 | #include <sys/types.h> |
29 | #include <sys/wait.h> |
43 | #include <sys/wait.h> |
30 | #include <unistd.h> |
44 | #include <unistd.h> |
31 | #include <time.h> |
45 | #include <time.h> |
32 | #include <sys/socket.h> |
|
|
33 | #include <netinet/in.h> |
|
|
34 | #include <arpa/inet.h> |
|
|
35 | |
46 | |
36 | |
47 | #include "netcompat.h" |
37 | #include <sys/mman.h> |
|
|
38 | |
48 | |
39 | #include "gettext.h" |
49 | #include "gettext.h" |
40 | #include "pidfile.h" |
50 | #include "pidfile.h" |
41 | #include "dropin.h" |
51 | #include "dropin.h" |
42 | |
52 | |
43 | #include "global.h" |
53 | #include "global.h" |
44 | #include "conf.h" |
54 | #include "conf.h" |
|
|
55 | #include "util.h" |
45 | #include "slog.h" |
56 | #include "slog.h" |
46 | #include "protocol.h" |
|
|
47 | |
57 | |
48 | int |
58 | int |
49 | write_pidfile (void) |
59 | write_pidfile (void) |
50 | { |
60 | { |
51 | int pid; |
61 | int pid; |
52 | |
62 | |
53 | pid = check_pid (pidfilename); |
63 | pid = check_pid (conf.pidfilename); |
54 | |
64 | |
55 | if (pid) |
65 | if (pid) |
56 | { |
66 | { |
57 | fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); |
67 | fprintf (stderr, _("A gvpe daemon is already running with pid %d.\n"), pid); |
58 | return 1; |
68 | return 1; |
59 | } |
69 | } |
60 | |
70 | |
61 | /* if it's locked, write-protected, or whatever */ |
71 | /* if it's locked, write-protected, or whatever */ |
62 | if (!write_pid (pidfilename)) |
72 | if (!write_pid (conf.pidfilename)) |
63 | return 1; |
73 | return 1; |
64 | |
74 | |
65 | return 0; |
75 | return 0; |
66 | } |
76 | } |
67 | |
77 | |
68 | int |
78 | int |
69 | kill_other (int signal) |
79 | kill_other (int signal) |
70 | { |
80 | { |
71 | int pid; |
81 | int pid; |
72 | |
82 | |
73 | pid = read_pid (pidfilename); |
83 | pid = read_pid (conf.pidfilename); |
74 | |
84 | |
75 | if (!pid) |
85 | if (!pid) |
76 | { |
86 | { |
77 | fprintf (stderr, _("No other vped is running.\n")); |
87 | fprintf (stderr, _("No other gvpe daemon is running.\n")); |
78 | return 1; |
88 | return 1; |
79 | } |
89 | } |
80 | |
90 | |
81 | errno = 0; /* No error, sometimes errno is only changed on error */ |
91 | errno = 0; /* No error, sometimes errno is only changed on error */ |
82 | |
92 | |
83 | /* ESRCH is returned when no process with that pid is found */ |
93 | /* ESRCH is returned when no process with that pid is found */ |
84 | if (kill (pid, signal) && errno == ESRCH) |
94 | if (kill (pid, signal) && errno == ESRCH) |
85 | { |
95 | { |
86 | fprintf (stderr, _("The vped is no longer running. ")); |
96 | fprintf (stderr, _("The gvpe daemon is no longer running. ")); |
87 | |
97 | |
88 | fprintf (stderr, _("Removing stale lock file.\n")); |
98 | fprintf (stderr, _("Removing stale lock file.\n")); |
89 | remove_pid (pidfilename); |
99 | remove_pid (conf.pidfilename); |
90 | } |
100 | } |
91 | |
101 | |
92 | return 0; |
102 | return 0; |
93 | } |
103 | } |
94 | |
104 | |
… | |
… | |
114 | return -1; |
124 | return -1; |
115 | } |
125 | } |
116 | |
126 | |
117 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
127 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
118 | |
128 | |
119 | if (!write_pid (pidfilename)) |
129 | if (!write_pid (conf.pidfilename)) |
120 | return -1; |
130 | return -1; |
121 | |
131 | |
122 | log_to (LOGTO_SYSLOG); |
132 | log_to (LOGTO_SYSLOG); |
123 | } |
133 | } |
124 | else |
134 | else |
125 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
135 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
126 | |
136 | |
127 | slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
137 | slog (L_INFO, _("gvpe daemon %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
128 | |
138 | |
129 | return 0; |
139 | return 0; |
130 | } |
140 | } |
131 | |
141 | |
132 | void |
142 | pid_t |
133 | make_names (void) |
|
|
134 | { |
|
|
135 | if (!pidfilename) |
|
|
136 | pidfilename = LOCALSTATEDIR "/run/vped.pid"; |
|
|
137 | |
|
|
138 | if (!confbase) |
|
|
139 | asprintf (&confbase, "%s/vpe", CONFDIR); |
|
|
140 | } |
|
|
141 | |
|
|
142 | void run_script (const run_script_cb &cb, bool wait) |
143 | run_script (const run_script_cb &cb, bool wait) |
143 | { |
144 | { |
144 | int pid; |
145 | sigset_t oldset; |
145 | |
146 | |
146 | if ((pid = fork ()) == 0) |
147 | if (wait) |
|
|
148 | { |
|
|
149 | sigset_t sigchld; |
|
|
150 | sigemptyset (&sigchld); |
|
|
151 | sigaddset (&sigchld, SIGCHLD); |
|
|
152 | sigprocmask (SIG_BLOCK, &sigchld, &oldset); |
147 | { |
153 | } |
148 | char *filename; |
154 | |
149 | asprintf (&filename, "%s/%s", confbase, cb(0)); |
155 | pid_t pid = fork (); |
150 | execl (filename, filename, (char *) 0); |
156 | |
151 | exit (255); |
157 | if (pid == 0) |
|
|
158 | { |
|
|
159 | sigprocmask (SIG_SETMASK, &oldset, 0); |
|
|
160 | |
|
|
161 | execl ("/bin/sh", "/bin/sh", "-c", cb (), (char *) 0); |
|
|
162 | exit (EXIT_FAILURE); |
152 | } |
163 | } |
153 | else if (pid > 0) |
164 | else if (pid > 0) |
154 | { |
165 | { |
155 | if (wait) |
166 | if (wait) |
156 | { |
167 | { |
|
|
168 | int status; |
157 | waitpid (pid, 0, 0); |
169 | int res = waitpid (pid, &status, 0); |
158 | /* TODO: check status */ |
170 | |
|
|
171 | sigprocmask (SIG_SETMASK, &oldset, 0); |
|
|
172 | |
|
|
173 | if (res < 0) |
|
|
174 | { |
|
|
175 | slog (L_WARN, _("waiting for an external command failed: %s."), |
|
|
176 | strerror (errno)); |
|
|
177 | return 0; |
|
|
178 | } |
|
|
179 | else if (!WIFEXITED (status) || WEXITSTATUS (status) != EXIT_SUCCESS) |
|
|
180 | { |
|
|
181 | slog (L_WARN, _("external command returned with exit status %d (%04x)."), |
|
|
182 | WEXITSTATUS (status), status); |
|
|
183 | return 0; |
|
|
184 | } |
159 | } |
185 | } |
160 | } |
186 | } |
|
|
187 | else |
|
|
188 | { |
|
|
189 | slog (L_ERR, _("unable to fork, exiting: %s"), strerror (errno)); |
|
|
190 | exit (EXIT_FAILURE); |
|
|
191 | } |
|
|
192 | |
|
|
193 | return pid; |
161 | } |
194 | } |
|
|
195 | |
|
|
196 | #if ENABLE_HTTP_PROXY |
|
|
197 | // works like strdup |
|
|
198 | u8 * |
|
|
199 | base64_encode (const u8 *data, unsigned int len) |
|
|
200 | { |
|
|
201 | const static char base64[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
|
|
202 | |
|
|
203 | unsigned int t, i; |
|
|
204 | const u8 *end = data + len; |
|
|
205 | u8 *res = new u8 [4 * ((len + 2) / 3) + 1]; |
|
|
206 | u8 *out = res; |
|
|
207 | |
|
|
208 | while (data <= end - 3) |
|
|
209 | { |
|
|
210 | t = (((data[0] << 8) | data[1]) << 8) | data[2]; |
|
|
211 | data += 3; |
|
|
212 | |
|
|
213 | *out++ = base64[(t >> 18) & 0x3f]; |
|
|
214 | *out++ = base64[(t >> 12) & 0x3f]; |
|
|
215 | *out++ = base64[(t >> 6) & 0x3f]; |
|
|
216 | *out++ = base64[(t ) & 0x3f]; |
|
|
217 | } |
|
|
218 | |
|
|
219 | for (t = 0, i = 0; data < end; i++) |
|
|
220 | t = (t << 8) | *data++; |
|
|
221 | |
|
|
222 | switch (i) |
|
|
223 | { |
|
|
224 | case 2: |
|
|
225 | *out++ = base64[(t >> 10) & 0x3f]; |
|
|
226 | *out++ = base64[(t >> 4) & 0x3f]; |
|
|
227 | *out++ = base64[(t << 2) & 0x3f]; |
|
|
228 | *out++ = '='; |
|
|
229 | break; |
|
|
230 | case 1: |
|
|
231 | *out++ = base64[(t >> 2) & 0x3f]; |
|
|
232 | *out++ = base64[(t << 4) & 0x3f]; |
|
|
233 | *out++ = '='; |
|
|
234 | *out++ = '='; |
|
|
235 | break; |
|
|
236 | } |
|
|
237 | |
|
|
238 | *out++ = 0; |
|
|
239 | |
|
|
240 | return res; |
|
|
241 | } |
|
|
242 | #endif |
|
|
243 | |
|
|
244 | void |
|
|
245 | id2mac (unsigned int id, void *m) |
|
|
246 | { |
|
|
247 | mac &p = *(mac *)m; |
|
|
248 | |
|
|
249 | if (id) |
|
|
250 | { |
|
|
251 | p[0] = 0xfe; |
|
|
252 | p[1] = 0xfd; |
|
|
253 | p[2] = 0x80; |
|
|
254 | p[3] = 0x00; |
|
|
255 | p[4] = id >> 8; |
|
|
256 | p[5] = id; |
|
|
257 | } |
|
|
258 | else |
|
|
259 | { |
|
|
260 | p[0] = 0xff; |
|
|
261 | p[1] = 0xff; |
|
|
262 | p[2] = 0xff; |
|
|
263 | p[3] = 0xff; |
|
|
264 | p[4] = 0xff; |
|
|
265 | p[5] = 0xff; |
|
|
266 | } |
|
|
267 | } |
|
|
268 | |