1 | /* |
1 | /* |
2 | util.C -- process management and other utility functions |
2 | util.C -- process management and other utility functions |
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3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
4 | Most of these are taken from tinc, see the AUTHORS file. |
5 | Some of these are taken from tinc, see the AUTHORS file. |
5 | |
6 | |
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7 | This file is part of GVPE. |
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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 |
7 | it under the terms of the GNU General Public License as published by |
10 | it under the terms of the GNU General Public License as published by |
8 | the Free Software Foundation; either version 2 of the License, or |
11 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. |
12 | (at your 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, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | but 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 |
14 | GNU General Public License for more details. |
17 | GNU General 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 |
17 | along with this program; if not, write to the Free Software |
20 | along with gvpe; if not, write to the Free Software |
18 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
22 | */ |
20 | |
23 | |
21 | #include "config.h" |
24 | #include "config.h" |
22 | |
25 | |
23 | #include <cstdio> |
26 | #include <cstdio> |
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27 | #include <cstdlib> |
24 | #include <cstring> |
28 | #include <cstring> |
25 | |
29 | |
26 | #include <errno.h> |
30 | #include <errno.h> |
27 | #include <signal.h> |
31 | #include <signal.h> |
28 | #include <sys/types.h> |
32 | #include <sys/types.h> |
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33 | #include <sys/wait.h> |
29 | #include <unistd.h> |
34 | #include <unistd.h> |
30 | #include <time.h> |
35 | #include <time.h> |
31 | #include <sys/socket.h> |
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32 | #include <netinet/in.h> |
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33 | #include <arpa/inet.h> |
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34 | |
36 | |
35 | #include <sys/mman.h> |
37 | #include "netcompat.h" |
36 | |
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37 | #include <openssl/rand.h> |
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38 | #include <openssl/rsa.h> |
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39 | #include <openssl/pem.h> |
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40 | #include <openssl/evp.h> |
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41 | |
38 | |
42 | #include "gettext.h" |
39 | #include "gettext.h" |
43 | #include "pidfile.h" |
40 | #include "pidfile.h" |
44 | #include "dropin.h" |
41 | #include "dropin.h" |
45 | |
42 | |
46 | #include "global.h" |
43 | #include "global.h" |
47 | #include "conf.h" |
44 | #include "conf.h" |
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45 | #include "util.h" |
48 | #include "slog.h" |
46 | #include "slog.h" |
49 | #include "protocol.h" |
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50 | |
47 | |
51 | int |
48 | int |
52 | write_pidfile (void) |
49 | write_pidfile (void) |
53 | { |
50 | { |
54 | int pid; |
51 | int pid; |
55 | |
52 | |
56 | pid = check_pid (pidfilename); |
53 | pid = check_pid (conf.pidfilename); |
57 | |
54 | |
58 | if (pid) |
55 | if (pid) |
59 | { |
56 | { |
60 | fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); |
57 | fprintf (stderr, _("A gvpe daemon is already running with pid %d.\n"), pid); |
61 | return 1; |
58 | return 1; |
62 | } |
59 | } |
63 | |
60 | |
64 | /* if it's locked, write-protected, or whatever */ |
61 | /* if it's locked, write-protected, or whatever */ |
65 | if (!write_pid (pidfilename)) |
62 | if (!write_pid (conf.pidfilename)) |
66 | return 1; |
63 | return 1; |
67 | |
64 | |
68 | return 0; |
65 | return 0; |
69 | } |
66 | } |
70 | |
67 | |
71 | int |
68 | int |
72 | kill_other (int signal) |
69 | kill_other (int signal) |
73 | { |
70 | { |
74 | int pid; |
71 | int pid; |
75 | |
72 | |
76 | pid = read_pid (pidfilename); |
73 | pid = read_pid (conf.pidfilename); |
77 | |
74 | |
78 | if (!pid) |
75 | if (!pid) |
79 | { |
76 | { |
80 | fprintf (stderr, _("No other vped is running.\n")); |
77 | fprintf (stderr, _("No other gvpe daemon is running.\n")); |
81 | return 1; |
78 | return 1; |
82 | } |
79 | } |
83 | |
80 | |
84 | errno = 0; /* No error, sometimes errno is only changed on error */ |
81 | errno = 0; /* No error, sometimes errno is only changed on error */ |
85 | |
82 | |
86 | /* ESRCH is returned when no process with that pid is found */ |
83 | /* ESRCH is returned when no process with that pid is found */ |
87 | if (kill (pid, signal) && errno == ESRCH) |
84 | if (kill (pid, signal) && errno == ESRCH) |
88 | { |
85 | { |
89 | fprintf (stderr, _("The vped is no longer running. ")); |
86 | fprintf (stderr, _("The gvpe daemon is no longer running. ")); |
90 | |
87 | |
91 | fprintf (stderr, _("Removing stale lock file.\n")); |
88 | fprintf (stderr, _("Removing stale lock file.\n")); |
92 | remove_pid (pidfilename); |
89 | remove_pid (conf.pidfilename); |
93 | } |
90 | } |
94 | |
91 | |
95 | return 0; |
92 | return 0; |
96 | } |
93 | } |
97 | |
94 | |
… | |
… | |
117 | return -1; |
114 | return -1; |
118 | } |
115 | } |
119 | |
116 | |
120 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
117 | /* Now UPDATE the pid in the pidfile, because we changed it... */ |
121 | |
118 | |
122 | if (!write_pid (pidfilename)) |
119 | if (!write_pid (conf.pidfilename)) |
123 | return -1; |
120 | return -1; |
124 | |
121 | |
125 | log_to (LOGTO_SYSLOG); |
122 | log_to (LOGTO_SYSLOG); |
126 | } |
123 | } |
127 | else |
124 | else |
128 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
125 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
129 | |
126 | |
130 | slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
127 | slog (L_INFO, _("gvpe daemon %s (%s %s) starting"), VERSION, __DATE__, __TIME__); |
131 | |
128 | |
132 | return 0; |
129 | return 0; |
133 | } |
130 | } |
134 | |
131 | |
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132 | void run_script (const run_script_cb &cb, bool wait) |
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133 | { |
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134 | int pid; |
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135 | |
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136 | if ((pid = fork ()) == 0) |
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137 | { |
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138 | char *filename; |
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139 | asprintf (&filename, "%s/%s", confbase, cb()); |
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140 | execl (filename, filename, (char *) 0); |
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141 | exit (126); |
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142 | } |
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143 | else if (pid > 0) |
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144 | { |
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145 | if (wait) |
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146 | { |
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147 | waitpid (pid, 0, 0); |
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148 | /* TODO: check status */ |
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149 | } |
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150 | } |
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151 | } |
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152 | |
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153 | #if ENABLE_HTTP_PROXY |
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154 | // works like strdup |
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155 | u8 * |
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156 | base64_encode (const u8 *data, unsigned int len) |
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157 | { |
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158 | const static char base64[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
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159 | |
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160 | unsigned int t, i; |
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161 | const u8 *end = data + len; |
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162 | u8 *res = new u8 [4 * ((len + 2) / 3) + 1]; |
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163 | u8 *out = res; |
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164 | |
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165 | while (data <= end - 3) |
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166 | { |
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167 | t = (((data[0] << 8) | data[1]) << 8) | data[2]; |
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168 | data += 3; |
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169 | |
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170 | *out++ = base64[(t >> 18) & 0x3f]; |
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171 | *out++ = base64[(t >> 12) & 0x3f]; |
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172 | *out++ = base64[(t >> 6) & 0x3f]; |
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173 | *out++ = base64[(t ) & 0x3f]; |
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174 | } |
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175 | |
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176 | for (t = 0, i = 0; data < end; i++) |
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177 | t = (t << 8) | *data++; |
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178 | |
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179 | switch (i) |
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180 | { |
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181 | case 2: |
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182 | *out++ = base64[(t >> 10) & 0x3f]; |
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183 | *out++ = base64[(t >> 4) & 0x3f]; |
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184 | *out++ = base64[(t << 2) & 0x3f]; |
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185 | *out++ = '='; |
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186 | break; |
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187 | case 1: |
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188 | *out++ = base64[(t >> 2) & 0x3f]; |
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189 | *out++ = base64[(t << 4) & 0x3f]; |
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190 | *out++ = '='; |
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191 | *out++ = '='; |
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192 | break; |
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193 | } |
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194 | |
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195 | *out++ = 0; |
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196 | |
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197 | return res; |
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198 | } |
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199 | #endif |
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200 | |
135 | void |
201 | void |
136 | make_names (void) |
202 | id2mac (unsigned int id, void *m) |
137 | { |
203 | { |
138 | if (!pidfilename) |
204 | mac &p = *(mac *)m; |
139 | pidfilename = LOCALSTATEDIR "/run/vped.pid"; |
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140 | |
205 | |
141 | if (!confbase) |
206 | if (id) |
142 | asprintf (&confbase, "%s/vpe", CONFDIR); |
207 | { |
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208 | p[0] = 0xfe; |
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209 | p[1] = 0xfd; |
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210 | p[2] = 0x80; |
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211 | p[3] = 0x00; |
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212 | p[4] = id >> 8; |
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213 | p[5] = id; |
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214 | } |
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215 | else |
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216 | { |
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217 | p[0] = 0xff; |
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218 | p[1] = 0xff; |
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219 | p[2] = 0xff; |
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220 | p[3] = 0xff; |
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221 | p[4] = 0xff; |
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222 | p[5] = 0xff; |
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223 | } |
143 | } |
224 | } |
144 | |
225 | |
145 | sockinfo::operator const char *() |
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146 | { |
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147 | static char hostport[15 + 1 + 5 + 1]; |
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148 | in_addr ia = { host }; |
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149 | |
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150 | sprintf (hostport, "%.15s:%d", inet_ntoa (ia), ntohs (port) & 0xffff); |
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151 | |
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152 | return hostport; |
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153 | } |
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154 | |
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