874258b3b87f49aea9cf5f26fd32420acbe2a859
[strongswan.git] / src / frontends / android / jni / libandroidbridge / charonservice.c
1 /*
2 * Copyright (C) 2012 Giuliano Grassi
3 * Copyright (C) 2012 Ralf Sager
4 * Copyright (C) 2012 Tobias Brunner
5 * Hochschule fuer Technik Rapperswil
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 */
17
18 #include <signal.h>
19 #include <string.h>
20 #include <android/log.h>
21
22 #include "charonservice.h"
23 #include "android_jni.h"
24 #include "kernel/android_ipsec.h"
25 #include "kernel/android_net.h"
26
27 #include <daemon.h>
28 #include <hydra.h>
29 #include <ipsec.h>
30 #include <library.h>
31 #include <threading/thread.h>
32
33 #define ANDROID_DEBUG_LEVEL 1
34
35 typedef struct private_charonservice_t private_charonservice_t;
36
37 /**
38 * private data of charonservice
39 */
40 struct private_charonservice_t {
41
42 /**
43 * public interface
44 */
45 charonservice_t public;
46
47 /**
48 * CharonVpnService reference
49 */
50 jobject vpn_service;
51 };
52
53 /**
54 * Single instance of charonservice_t.
55 */
56 charonservice_t *charonservice;
57
58 /**
59 * hook in library for debugging messages
60 */
61 extern void (*dbg)(debug_t group, level_t level, char *fmt, ...);
62
63 /**
64 * Logging hook for library logs, using android specific logging
65 */
66 static void dbg_android(debug_t group, level_t level, char *fmt, ...)
67 {
68 va_list args;
69
70 if (level <= ANDROID_DEBUG_LEVEL)
71 {
72 char sgroup[16], buffer[8192];
73 char *current = buffer, *next;
74
75 snprintf(sgroup, sizeof(sgroup), "%N", debug_names, group);
76 va_start(args, fmt);
77 vsnprintf(buffer, sizeof(buffer), fmt, args);
78 va_end(args);
79 while (current)
80 { /* log each line separately */
81 next = strchr(current, '\n');
82 if (next)
83 {
84 *(next++) = '\0';
85 }
86 __android_log_print(ANDROID_LOG_INFO, "charon", "00[%s] %s\n",
87 sgroup, current);
88 current = next;
89 }
90 }
91 }
92
93 METHOD(charonservice_t, update_status, bool,
94 private_charonservice_t *this, android_vpn_state_t code)
95 {
96 JNIEnv *env;
97 jmethodID method_id;
98 bool success = FALSE;
99
100 androidjni_attach_thread(&env);
101
102 method_id = (*env)->GetMethodID(env, android_charonvpnservice_class,
103 "updateStatus", "(I)V");
104 if (!method_id)
105 {
106 goto failed;
107 }
108 (*env)->CallVoidMethod(env, this->vpn_service, method_id, (jint)code);
109 success = !androidjni_exception_occurred(env);
110
111 failed:
112 androidjni_exception_occurred(env);
113 androidjni_detach_thread();
114 return success;
115 }
116
117 METHOD(charonservice_t, bypass_socket, bool,
118 private_charonservice_t *this, int fd, int family)
119 {
120 JNIEnv *env;
121 jmethodID method_id;
122
123 androidjni_attach_thread(&env);
124
125 method_id = (*env)->GetMethodID(env, android_charonvpnservice_class,
126 "protect", "(I)Z");
127 if (!method_id)
128 {
129 goto failed;
130 }
131 if (!(*env)->CallBooleanMethod(env, this->vpn_service, method_id, fd))
132 {
133 DBG1(DBG_CFG, "VpnService.protect() failed");
134 goto failed;
135 }
136 androidjni_detach_thread();
137 return TRUE;
138
139 failed:
140 androidjni_exception_occurred(env);
141 androidjni_detach_thread();
142 return FALSE;
143 }
144
145 /**
146 * Initialize the charonservice object
147 */
148 static void charonservice_init(JNIEnv *env, jobject service)
149 {
150 private_charonservice_t *this;
151 static plugin_feature_t features[] = {
152 PLUGIN_CALLBACK(kernel_net_register, kernel_android_net_create),
153 PLUGIN_PROVIDE(CUSTOM, "kernel-net"),
154 PLUGIN_CALLBACK(kernel_ipsec_register, kernel_android_ipsec_create),
155 PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
156 };
157
158 INIT(this,
159 .public = {
160 .update_status = _update_status,
161 .bypass_socket = _bypass_socket,
162 },
163 .vpn_service = (*env)->NewGlobalRef(env, service),
164 );
165 charonservice = &this->public;
166
167 lib->plugins->add_static_features(lib->plugins, "androidbridge", features,
168 countof(features), TRUE);
169
170 lib->settings->set_int(lib->settings,
171 "charon.plugins.android_log.loglevel", ANDROID_DEBUG_LEVEL);
172 }
173
174 /**
175 * Deinitialize the charonservice object
176 */
177 static void charonservice_deinit(JNIEnv *env)
178 {
179 private_charonservice_t *this = (private_charonservice_t*)charonservice;
180
181 (*env)->DeleteGlobalRef(env, this->vpn_service);
182 free(this);
183 charonservice = NULL;
184 }
185
186 /**
187 * Handle SIGSEGV/SIGILL signals raised by threads
188 */
189 static void segv_handler(int signal)
190 {
191 dbg_android(DBG_DMN, 1, "thread %u received %d", thread_current_id(),
192 signal);
193 exit(1);
194 }
195
196 /**
197 * Initialize charon and the libraries via JNI
198 */
199 JNI_METHOD(CharonVpnService, initializeCharon, void)
200 {
201 struct sigaction action;
202
203 /* logging for library during initialization, as we have no bus yet */
204 dbg = dbg_android;
205
206 /* initialize library */
207 if (!library_init(NULL))
208 {
209 library_deinit();
210 return;
211 }
212
213 if (!libhydra_init("charon"))
214 {
215 libhydra_deinit();
216 library_deinit();
217 return;
218 }
219
220 if (!libipsec_init())
221 {
222 libipsec_deinit();
223 libhydra_deinit();
224 library_deinit();
225 return;
226 }
227
228 charonservice_init(env, this);
229
230 if (!libcharon_init("charon") ||
231 !charon->initialize(charon, PLUGINS))
232 {
233 libcharon_deinit();
234 charonservice_deinit(env);
235 libipsec_deinit();
236 libhydra_deinit();
237 library_deinit();
238 return;
239 }
240
241 /* add handler for SEGV and ILL etc. */
242 action.sa_handler = segv_handler;
243 action.sa_flags = 0;
244 sigemptyset(&action.sa_mask);
245 sigaction(SIGSEGV, &action, NULL);
246 sigaction(SIGILL, &action, NULL);
247 sigaction(SIGBUS, &action, NULL);
248 action.sa_handler = SIG_IGN;
249 sigaction(SIGPIPE, &action, NULL);
250
251 /* start daemon (i.e. the threads in the thread-pool) */
252 charon->start(charon);
253 }
254
255 /**
256 * Deinitialize charon and all libraries
257 */
258 JNI_METHOD(CharonVpnService, deinitializeCharon, void)
259 {
260 libcharon_deinit();
261 charonservice_deinit(env);
262 libipsec_deinit();
263 libhydra_deinit();
264 library_deinit();
265 }
266