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Comparing gvpe/src/util.C (file contents):
Revision 1.1 by pcg, Sat Mar 1 15:53:03 2003 UTC vs.
Revision 1.17 by pcg, Fri Mar 18 01:53:05 2005 UTC

1/* 1/*
2 util.C -- process management and other utility functions 2 util.C -- process management and other utility functions
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
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
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>
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>
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>
32#include <netinet/in.h>
33#include <arpa/inet.h>
34 36
35#include <sys/mman.h>
36
37#include <openssl/rand.h>
38#include <openssl/rsa.h>
39#include <openssl/pem.h>
40#include <openssl/evp.h>
41
42#include "gettext.h" 37#include "netcompat.h"
38
43#include "pidfile.h" 39#include "pidfile.h"
44#include "dropin.h" 40#include "dropin.h"
45 41
46#include "global.h" 42#include "global.h"
47#include "conf.h" 43#include "conf.h"
44#include "util.h"
48#include "slog.h" 45#include "slog.h"
49#include "protocol.h"
50
51time_t now;
52 46
53int 47int
54write_pidfile (void) 48write_pidfile (void)
55{ 49{
56 int pid; 50 int pid;
57 51
58 pid = check_pid (pidfilename); 52 pid = check_pid (conf.pidfilename);
59 53
60 if (pid) 54 if (pid)
61 { 55 {
62 fprintf (stderr, _("A vped is already running with pid %d.\n"), pid); 56 fprintf (stderr, _("A gvpe daemon is already running with pid %d.\n"), pid);
63 return 1; 57 return 1;
64 } 58 }
65 59
66 /* if it's locked, write-protected, or whatever */ 60 /* if it's locked, write-protected, or whatever */
67 if (!write_pid (pidfilename)) 61 if (!write_pid (conf.pidfilename))
68 return 1; 62 return 1;
69 63
70 return 0; 64 return 0;
71} 65}
72 66
73int 67int
74kill_other (int signal) 68kill_other (int signal)
75{ 69{
76 int pid; 70 int pid;
77 71
78 pid = read_pid (pidfilename); 72 pid = read_pid (conf.pidfilename);
79 73
80 if (!pid) 74 if (!pid)
81 { 75 {
82 fprintf (stderr, _("No other vped is running.\n")); 76 fprintf (stderr, _("No other gvpe daemon is running.\n"));
83 return 1; 77 return 1;
84 } 78 }
85 79
86 errno = 0; /* No error, sometimes errno is only changed on error */ 80 errno = 0; /* No error, sometimes errno is only changed on error */
87 81
88 /* ESRCH is returned when no process with that pid is found */ 82 /* ESRCH is returned when no process with that pid is found */
89 if (kill (pid, signal) && errno == ESRCH) 83 if (kill (pid, signal) && errno == ESRCH)
90 { 84 {
91 fprintf (stderr, _("The vped is no longer running. ")); 85 fprintf (stderr, _("The gvpe daemon is no longer running. "));
92 86
93 fprintf (stderr, _("Removing stale lock file.\n")); 87 fprintf (stderr, _("Removing stale lock file.\n"));
94 remove_pid (pidfilename); 88 remove_pid (conf.pidfilename);
95 } 89 }
96 90
97 return 0; 91 return 0;
98} 92}
99 93
… …
119 return -1; 113 return -1;
120 } 114 }
121 115
122 /* Now UPDATE the pid in the pidfile, because we changed it... */ 116 /* Now UPDATE the pid in the pidfile, because we changed it... */
123 117
124 if (!write_pid (pidfilename)) 118 if (!write_pid (conf.pidfilename))
125 return -1; 119 return -1;
126 120
127 log_to (LOGTO_SYSLOG); 121 log_to (LOGTO_SYSLOG);
128 } 122 }
129 else 123 else
130 log_to (LOGTO_SYSLOG | LOGTO_STDERR); 124 log_to (LOGTO_SYSLOG | LOGTO_STDERR);
131 125
132 slog (L_INFO, _("vped %s (%s %s) starting"), VERSION, __DATE__, __TIME__); 126 slog (L_INFO, _("gvpe daemon %s (%s %s) starting"), VERSION, __DATE__, __TIME__);
133 127
134 return 0; 128 return 0;
135} 129}
136 130
131void run_script (const run_script_cb &cb, bool wait)
132{
133 int pid;
134
135 if ((pid = fork ()) == 0)
136 {
137 char *filename;
138 asprintf (&filename, "%s/%s", confbase, cb());
139 execl (filename, filename, (char *) 0);
140 exit (126);
141 }
142 else if (pid > 0)
143 {
144 if (wait)
145 {
146 waitpid (pid, 0, 0);
147 /* TODO: check status */
148 }
149 }
150}
151
152#if ENABLE_HTTP_PROXY
153// works like strdup
154u8 *
155base64_encode (const u8 *data, unsigned int len)
156{
157 const static char base64[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
158
159 unsigned int t, i;
160 const u8 *end = data + len;
161 u8 *res = new u8 [4 * ((len + 2) / 3) + 1];
162 u8 *out = res;
163
164 while (data <= end - 3)
165 {
166 t = (((data[0] << 8) | data[1]) << 8) | data[2];
167 data += 3;
168
169 *out++ = base64[(t >> 18) & 0x3f];
170 *out++ = base64[(t >> 12) & 0x3f];
171 *out++ = base64[(t >> 6) & 0x3f];
172 *out++ = base64[(t ) & 0x3f];
173 }
174
175 for (t = 0, i = 0; data < end; i++)
176 t = (t << 8) | *data++;
177
178 switch (i)
179 {
180 case 2:
181 *out++ = base64[(t >> 10) & 0x3f];
182 *out++ = base64[(t >> 4) & 0x3f];
183 *out++ = base64[(t << 2) & 0x3f];
184 *out++ = '=';
185 break;
186 case 1:
187 *out++ = base64[(t >> 2) & 0x3f];
188 *out++ = base64[(t << 4) & 0x3f];
189 *out++ = '=';
190 *out++ = '=';
191 break;
192 }
193
194 *out++ = 0;
195
196 return res;
197}
198#endif
199
137void 200void
138make_names (void) 201id2mac (unsigned int id, void *m)
139{ 202{
140 if (!pidfilename) 203 mac &p = *(mac *)m;
141 pidfilename = LOCALSTATEDIR "/run/vped.pid";
142 204
143 if (!confbase)
144 asprintf (&confbase, "%s/vpe", CONFDIR);
145}
146
147void pkt_queue::put (tap_packet *p)
148{
149 if (queue[i])
150 {
151 delete queue[i];
152 j = (j + 1) % QUEUEDEPTH;
153 }
154
155 queue[i] = p;
156
157 i = (i + 1) % QUEUEDEPTH;
158}
159
160tap_packet *pkt_queue::get ()
161{
162 tap_packet *p = queue[j];
163
164 if (p) 205 if (id)
165 {
166 queue[j] = 0;
167 j = (j + 1) % QUEUEDEPTH;
168 }
169
170 return p;
171}
172
173pkt_queue::pkt_queue ()
174{
175 memset (queue, 0, sizeof (queue));
176 i = 0;
177 j = 0;
178}
179
180pkt_queue::~pkt_queue ()
181{
182 for (i = QUEUEDEPTH; --i > 0; )
183 delete queue[i];
184}
185
186sockinfo::operator const char *()
187{
188 static char hostport[15 + 1 + 5 + 1];
189 in_addr ia = { host };
190
191 sprintf (hostport, "%.15s:%d", inet_ntoa (ia), ntohs (port) & 0xffff);
192
193 return hostport;
194}
195
196bool u32_rate_limiter::can (u32 host)
197{
198 iterator i;
199
200 for (i = begin (); i != end (); )
201 if (i->second <= now)
202 { 206 {
203 erase (i); 207 p[0] = 0xfe;
204 i = begin (); 208 p[1] = 0xfd;
209 p[2] = 0x80;
210 p[3] = 0x00;
211 p[4] = id >> 8;
212 p[5] = id;
205 } 213 }
206 else 214 else
207 ++i; 215 {
208 216 p[0] = 0xff;
209 i = find (host); 217 p[1] = 0xff;
210 218 p[2] = 0xff;
211 if (i != end ()) 219 p[3] = 0xff;
212 return false; 220 p[4] = 0xff;
213 221 p[5] = 0xff;
214 insert (value_type (host, now + every)); 222 }
215
216 return true;
217} 223}
218 224

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