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Commit | Line | Data |
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05207d69 MT |
1 | /* |
2 | * | |
3 | * File originally from the Smoothwall project | |
4 | * (c) 2001 Smoothwall Team | |
5 | * | |
05207d69 MT |
6 | */ |
7 | ||
8 | #include "libsmooth.h" | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | #include <unistd.h> | |
13 | #include <sys/types.h> | |
14 | #include <sys/stat.h> | |
15 | #include <signal.h> | |
52e54c1c | 16 | |
05207d69 | 17 | #include "setuid.h" |
52e54c1c | 18 | #include "netutil.h" |
05207d69 | 19 | |
5fd30232 MT |
20 | /* |
21 | This module is responsible for start stop of the vpn system. | |
22 | ||
23 | 1) it allows AH & ESP to get in from interface where a vpn is mounted | |
69dcc425 | 24 | The NAT traversal is used on the udp 4500 port. |
5fd30232 MT |
25 | |
26 | 2) it starts the ipsec daemon | |
69dcc425 CS |
27 | The RED interface is a problem because it can be up or down a startup. |
28 | Then, the state change and it must not affect other VPN mounted on | |
29 | other interface. | |
30 | Unfortunatly, openswan 1 cannot do that correctly. It cannot use an | |
31 | interface without restarting everything. | |
5fd30232 MT |
32 | |
33 | */ | |
34 | ||
05207d69 | 35 | void usage() { |
69dcc425 CS |
36 | fprintf (stderr, "Usage:\n"); |
37 | fprintf (stderr, "\tipsecctrl S [connectionkey]\n"); | |
38 | fprintf (stderr, "\tipsecctrl D [connectionkey]\n"); | |
39 | fprintf (stderr, "\tipsecctrl R\n"); | |
db073a10 | 40 | fprintf (stderr, "\tipsecctrl I\n"); |
69dcc425 CS |
41 | fprintf (stderr, "\t\tS : Start/Restart Connection\n"); |
42 | fprintf (stderr, "\t\tD : Stop Connection\n"); | |
43 | fprintf (stderr, "\t\tR : Reload Certificates and Secrets\n"); | |
db073a10 | 44 | fprintf (stderr, "\t\tI : Print Statusinfo\n"); |
05207d69 MT |
45 | } |
46 | ||
8fcb9253 MT |
47 | static void ipsec_reload() { |
48 | /* Re-read all configuration files and secrets and | |
49 | * reload the daemon (#10339). | |
50 | */ | |
51 | safe_system("/usr/sbin/ipsec rereadall >/dev/null 2>&1"); | |
52 | safe_system("/usr/sbin/ipsec reload >/dev/null 2>&1"); | |
53 | } | |
54 | ||
5fd30232 MT |
55 | /* |
56 | return values from the vpn config file or false if not 'on' | |
57 | */ | |
58 | int decode_line (char *s, | |
69dcc425 CS |
59 | char **key, |
60 | char **name, | |
9f0b5c9f | 61 | char **type |
69dcc425 CS |
62 | ) { |
63 | int count = 0; | |
64 | *key = NULL; | |
65 | *name = NULL; | |
66 | *type = NULL; | |
67 | ||
68 | if (s[strlen(s) - 1] == '\n') | |
69 | s[strlen(s) - 1] = '\0'; | |
70 | ||
71 | char *result = strsep(&s, ","); | |
72 | while (result) { | |
73 | if (count == 0) | |
74 | *key = result; | |
75 | if ((count == 1) && strcmp(result, "on") != 0) | |
76 | return 0; // a disabled line | |
77 | if (count == 2) | |
78 | *name = result; | |
79 | if (count == 4) | |
80 | *type = result; | |
69dcc425 CS |
81 | count++; |
82 | result = strsep(&s, ","); | |
83 | } | |
84 | ||
85 | // check other syntax | |
86 | if (! *name) | |
87 | return 0; | |
88 | ||
89 | if (strspn(*name, LETTERS_NUMBERS) != strlen(*name)) { | |
90 | fprintf(stderr, "Bad connection name: %s\n", *name); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | if (! (strcmp(*type, "host") == 0 || strcmp(*type, "net") == 0)) { | |
95 | fprintf(stderr, "Bad connection type: %s\n", *type); | |
96 | return 0; | |
97 | } | |
98 | ||
69dcc425 CS |
99 | //it's a valid & active line |
100 | return 1; | |
5fd30232 MT |
101 | } |
102 | ||
103 | /* | |
104 | issue ipsec commmands to turn on connection 'name' | |
105 | */ | |
9f0b5c9f MT |
106 | void turn_connection_on(char *name, char *type) { |
107 | /* | |
108 | * To bring up a connection, we need to reload the configuration | |
109 | * and issue ipsec up afterwards. To make sure the connection | |
110 | * is not established from the start, we bring it down in advance. | |
111 | */ | |
6e2ba31b | 112 | char command[STRING_SIZE]; |
6e2ba31b | 113 | |
9f0b5c9f | 114 | // Bring down the connection (if established). |
6e2ba31b | 115 | snprintf(command, STRING_SIZE - 1, |
9f0b5c9f | 116 | "/usr/sbin/ipsec down %s >/dev/null", name); |
6e2ba31b | 117 | safe_system(command); |
6e2ba31b | 118 | |
6c920b19 MT |
119 | // Reload the IPsec firewall policy |
120 | safe_system("/usr/lib/firewall/ipsec-policy >/dev/null"); | |
80fbd899 | 121 | |
8e2683f7 MT |
122 | // Reload the configuration into the daemon (#10339). |
123 | ipsec_reload(); | |
6e2ba31b | 124 | |
9f0b5c9f MT |
125 | // Bring the connection up again. |
126 | snprintf(command, STRING_SIZE - 1, | |
b89ae1a4 | 127 | "/usr/sbin/ipsec stroke up-nb %s >/dev/null", name); |
9f0b5c9f | 128 | safe_system(command); |
5fd30232 | 129 | } |
9f0b5c9f | 130 | |
5fd30232 MT |
131 | /* |
132 | issue ipsec commmands to turn off connection 'name' | |
133 | */ | |
134 | void turn_connection_off (char *name) { | |
9f0b5c9f MT |
135 | /* |
136 | * To turn off a connection, all SAs must be turned down. | |
137 | * After that, the configuration must be reloaded. | |
138 | */ | |
69dcc425 | 139 | char command[STRING_SIZE]; |
9f0b5c9f MT |
140 | |
141 | // Bring down the connection. | |
3e077ef3 | 142 | snprintf(command, STRING_SIZE - 1, |
9f0b5c9f | 143 | "/usr/sbin/ipsec down %s >/dev/null", name); |
3e077ef3 | 144 | safe_system(command); |
6e2ba31b | 145 | |
9f0b5c9f | 146 | // Reload, so the connection is dropped. |
8e2683f7 | 147 | ipsec_reload(); |
4f6790a7 | 148 | |
6c920b19 MT |
149 | // Reload the IPsec firewall policy |
150 | safe_system("/usr/lib/firewall/ipsec-policy >/dev/null"); | |
8e2683f7 MT |
151 | } |
152 | ||
05207d69 | 153 | int main(int argc, char *argv[]) { |
69dcc425 CS |
154 | struct keyvalue *kv = NULL; |
155 | ||
156 | if (argc < 2) { | |
157 | usage(); | |
158 | exit(1); | |
159 | } | |
160 | if (!(initsetuid())) | |
161 | exit(1); | |
6cf8bc91 MT |
162 | |
163 | FILE *file = NULL; | |
ba149d47 AF |
164 | |
165 | if (strcmp(argv[1], "I") == 0) { | |
9f0b5c9f | 166 | safe_system("/usr/sbin/ipsec status"); |
ba149d47 AF |
167 | exit(0); |
168 | } | |
169 | ||
170 | if (strcmp(argv[1], "R") == 0) { | |
8e2683f7 | 171 | ipsec_reload(); |
ba149d47 AF |
172 | exit(0); |
173 | } | |
174 | ||
69dcc425 CS |
175 | /* FIXME: workaround for pclose() issue - still no real idea why |
176 | * this is happening */ | |
177 | signal(SIGCHLD, SIG_DFL); | |
178 | ||
179 | /* handle operations that doesn't need start the ipsec system */ | |
180 | if (argc == 2) { | |
181 | if (strcmp(argv[1], "D") == 0) { | |
9f0b5c9f | 182 | safe_system("/usr/sbin/ipsec stop >/dev/null 2>&1"); |
6cf8bc91 | 183 | safe_system("/usr/lib/firewall/ipsec-policy >/dev/null"); |
69dcc425 CS |
184 | exit(0); |
185 | } | |
69dcc425 CS |
186 | } |
187 | ||
69dcc425 CS |
188 | /* read vpn config */ |
189 | kv=initkeyvalues(); | |
190 | if (!readkeyvalues(kv, CONFIG_ROOT "/vpn/settings")) | |
191 | { | |
192 | fprintf(stderr, "Cannot read vpn settings\n"); | |
193 | exit(1); | |
194 | } | |
195 | ||
196 | /* check is the vpn system is enabled */ | |
197 | { | |
198 | char s[STRING_SIZE]; | |
199 | findkey(kv, "ENABLED", s); | |
200 | freekeyvalues(kv); | |
201 | if (strcmp (s, "on") != 0) | |
202 | exit(0); | |
203 | } | |
204 | ||
69dcc425 CS |
205 | char s[STRING_SIZE]; |
206 | ||
6cf8bc91 | 207 | // start the system |
69dcc425 | 208 | if ((argc == 2) && strcmp(argv[1], "S") == 0) { |
6c920b19 | 209 | safe_system("/usr/lib/firewall/ipsec-policy >/dev/null"); |
9f0b5c9f | 210 | safe_system("/usr/sbin/ipsec restart >/dev/null"); |
69dcc425 CS |
211 | exit(0); |
212 | } | |
213 | ||
214 | // it is a selective start or stop | |
215 | // second param is only a number 'key' | |
216 | if ((argc == 2) || strspn(argv[2], NUMBERS) != strlen(argv[2])) { | |
9f0b5c9f | 217 | fprintf(stderr, "Bad arg: %s\n", argv[2]); |
69dcc425 CS |
218 | usage(); |
219 | exit(1); | |
220 | } | |
221 | ||
222 | // search the vpn pointed by 'key' | |
223 | if (!(file = fopen(CONFIG_ROOT "/vpn/config", "r"))) { | |
69dcc425 CS |
224 | fprintf(stderr, "Couldn't open vpn settings file"); |
225 | exit(1); | |
226 | } | |
227 | while (fgets(s, STRING_SIZE, file) != NULL) { | |
228 | char *key; | |
229 | char *name; | |
230 | char *type; | |
9f0b5c9f | 231 | if (!decode_line(s,&key,&name,&type)) |
69dcc425 CS |
232 | continue; |
233 | ||
69dcc425 CS |
234 | // is it the 'key' requested ? |
235 | if (strcmp(argv[2], key) != 0) | |
236 | continue; | |
9f0b5c9f | 237 | |
69dcc425 CS |
238 | // Start or Delete this Connection |
239 | if (strcmp(argv[1], "S") == 0) | |
240 | turn_connection_on (name, type); | |
9f0b5c9f | 241 | else if (strcmp(argv[1], "D") == 0) |
69dcc425 CS |
242 | turn_connection_off (name); |
243 | else { | |
69dcc425 CS |
244 | fprintf(stderr, "Bad command\n"); |
245 | exit(1); | |
246 | } | |
247 | } | |
248 | fclose(file); | |
9f0b5c9f | 249 | |
69dcc425 | 250 | return 0; |
05207d69 | 251 | } |