1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* NHRP daemon main functions
* Copyright (c) 2014-2015 Timo Teräs
*
* This file is free software: you may copy, redistribute and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*/
#include <unistd.h>
#include "zebra.h"
#include "privs.h"
#include "getopt.h"
#include "thread.h"
#include "sigevent.h"
#include "version.h"
#include "log.h"
#include "memory.h"
#include "command.h"
#include "nhrpd.h"
#include "netlink.h"
unsigned int debug_flags = 0;
struct thread_master *master;
struct timeval current_time;
static const char *pid_file = PATH_NHRPD_PID;
static char config_default[] = SYSCONFDIR NHRP_DEFAULT_CONFIG;
static char *config_file = NULL;
static char *vty_addr = NULL;
static int vty_port = NHRP_VTY_PORT;
static int do_daemonise = 0;
/* nhrpd options. */
struct option longopts[] = {
{ "daemon", no_argument, NULL, 'd'},
{ "config_file", required_argument, NULL, 'f'},
{ "pid_file", required_argument, NULL, 'i'},
{ "socket", required_argument, NULL, 'z'},
{ "help", no_argument, NULL, 'h'},
{ "vty_addr", required_argument, NULL, 'A'},
{ "vty_port", required_argument, NULL, 'P'},
{ "user", required_argument, NULL, 'u'},
{ "group", required_argument, NULL, 'g'},
{ "version", no_argument, NULL, 'v'},
{ 0 }
};
/* nhrpd privileges */
static zebra_capabilities_t _caps_p [] = {
ZCAP_NET_RAW,
ZCAP_NET_ADMIN,
ZCAP_DAC_OVERRIDE, /* for now needed to write to /proc/sys/net/ipv4/<if>/send_redirect */
};
static struct zebra_privs_t nhrpd_privs = {
#ifdef QUAGGA_USER
.user = QUAGGA_USER,
#endif
#ifdef QUAGGA_GROUP
.group = QUAGGA_GROUP,
#endif
#ifdef VTY_GROUP
.vty_group = VTY_GROUP,
#endif
.caps_p = _caps_p,
.cap_num_p = ZEBRA_NUM_OF(_caps_p),
};
static void usage(const char *progname, int status)
{
if (status != 0)
fprintf(stderr, "Try `%s --help' for more information.\n", progname);
else
printf(
"Usage : %s [OPTION...]\n\
Daemon which manages NHRP protocol.\n\n\
-d, --daemon Runs in daemon mode\n\
-f, --config_file Set configuration file name\n\
-i, --pid_file Set process identifier file name\n\
-z, --socket Set path of zebra socket\n\
-A, --vty_addr Set vty's bind address\n\
-P, --vty_port Set vty's port number\n\
-u, --user User to run as\n\
-g, --group Group to run as\n\
-v, --version Print program version\n\
-h, --help Display this help and exit\n\
\n\
Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
exit(status);
}
static void parse_arguments(const char *progname, int argc, char **argv)
{
int opt;
while (1) {
opt = getopt_long(argc, argv, "df:i:z:hA:P:u:g:v", longopts, 0);
if(opt < 0) break;
switch (opt) {
case 0:
break;
case 'd':
do_daemonise = -1;
break;
case 'f':
config_file = optarg;
break;
case 'i':
pid_file = optarg;
break;
case 'z':
zclient_serv_path_set(optarg);
break;
case 'A':
vty_addr = optarg;
break;
case 'P':
vty_port = atoi (optarg);
if (vty_port <= 0 || vty_port > 0xffff)
vty_port = NHRP_VTY_PORT;
break;
case 'u':
nhrpd_privs.user = optarg;
break;
case 'g':
nhrpd_privs.group = optarg;
break;
case 'v':
print_version(progname);
exit(0);
break;
case 'h':
usage(progname, 0);
break;
default:
usage(progname, 1);
break;
}
}
}
static void nhrp_sigusr1(void)
{
zlog_rotate(NULL);
}
static void nhrp_request_stop(void)
{
debugf(NHRP_DEBUG_COMMON, "Exiting...");
nhrp_shortcut_terminate();
nhrp_nhs_terminate();
nhrp_zebra_terminate();
vici_terminate();
evmgr_terminate();
nhrp_vc_terminate();
vrf_terminate();
/* memory_terminate(); */
/* vty_terminate(); */
cmd_terminate();
/* signal_terminate(); */
zprivs_terminate(&nhrpd_privs);
debugf(NHRP_DEBUG_COMMON, "Remove pid file.");
if (pid_file) unlink(pid_file);
debugf(NHRP_DEBUG_COMMON, "Done.");
closezlog(zlog_default);
exit(0);
}
static struct quagga_signal_t sighandlers[] = {
{ .signal = SIGUSR1, .handler = &nhrp_sigusr1, },
{ .signal = SIGINT, .handler = &nhrp_request_stop, },
{ .signal = SIGTERM, .handler = &nhrp_request_stop, },
};
int main(int argc, char **argv)
{
struct thread thread;
const char *progname;
/* Set umask before anything for security */
umask(0027);
progname = basename(argv[0]);
zlog_default = openzlog(progname, ZLOG_NHRP, LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
zlog_set_level(NULL, ZLOG_DEST_STDOUT, LOG_WARNING);
parse_arguments(progname, argc, argv);
/* Library inits. */
master = thread_master_create();
zprivs_init(&nhrpd_privs);
signal_init(master, array_size(sighandlers), sighandlers);
cmd_init(1);
vty_init(master);
memory_init();
nhrp_interface_init();
vrf_init();
resolver_init();
/* Run with elevated capabilities, as for all netlink activity
* we need privileges anyway. */
nhrpd_privs.change(ZPRIVS_RAISE);
netlink_init();
evmgr_init();
nhrp_vc_init();
nhrp_packet_init();
vici_init();
nhrp_zebra_init();
nhrp_shortcut_init();
nhrp_config_init();
/* Get zebra configuration file. */
zlog_set_level(NULL, ZLOG_DEST_STDOUT, do_daemonise ? ZLOG_DISABLED : LOG_DEBUG);
vty_read_config(config_file, config_default);
if (do_daemonise && daemon(0, 0) < 0) {
zlog_err("daemonise: %s", safe_strerror(errno));
exit (1);
}
/* write pid file */
if (pid_output(pid_file) < 0) {
zlog_err("error while writing pidfile");
exit (1);
}
/* Create VTY socket */
vty_serv_sock(vty_addr, vty_port, NHRP_VTYSH_PATH);
zlog_notice("nhrpd starting: vty@%d", vty_port);
/* Main loop */
while (thread_fetch(master, &thread))
thread_call(&thread);
return 0;
}
|
