android_net_NetUtils.cpp revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087 
1/*
2 * Copyright 2008, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "NetUtils"
18
19#include "jni.h"
20#include <utils/misc.h>
21#include <android_runtime/AndroidRuntime.h>
22#include <utils/Log.h>
23#include <arpa/inet.h>
24
25extern "C" {
26int ifc_disable(const char *ifname);
27int ifc_add_host_route(const char *ifname, uint32_t addr);
28int ifc_remove_host_routes(const char *ifname);
29int ifc_set_default_route(const char *ifname, uint32_t gateway);
30int ifc_get_default_route(const char *ifname);
31int ifc_remove_default_route(const char *ifname);
32int ifc_reset_connections(const char *ifname);
33int ifc_configure(const char *ifname, in_addr_t ipaddr, in_addr_t netmask, in_addr_t gateway, in_addr_t dns1, in_addr_t dns2);
34
35int dhcp_do_request(const char *ifname,
36                    in_addr_t *ipaddr,
37                    in_addr_t *gateway,
38                    in_addr_t *mask,
39                    in_addr_t *dns1,
40                    in_addr_t *dns2,
41                    in_addr_t *server,
42                    uint32_t  *lease);
43int dhcp_stop(const char *ifname);
44int dhcp_release_lease(const char *ifname);
45char *dhcp_get_errmsg();
46}
47
48#define NETUTILS_PKG_NAME "android/net/NetworkUtils"
49
50namespace android {
51
52/*
53 * The following remembers the jfieldID's of the fields
54 * of the DhcpInfo Java object, so that we don't have
55 * to look them up every time.
56 */
57static struct fieldIds {
58    jclass dhcpInfoClass;
59    jmethodID constructorId;
60    jfieldID ipaddress;
61    jfieldID gateway;
62    jfieldID netmask;
63    jfieldID dns1;
64    jfieldID dns2;
65    jfieldID serverAddress;
66    jfieldID leaseDuration;
67} dhcpInfoFieldIds;
68
69static jint android_net_utils_disableInterface(JNIEnv* env, jobject clazz, jstring ifname)
70{
71    int result;
72
73    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
74    result = ::ifc_disable(nameStr);
75    env->ReleaseStringUTFChars(ifname, nameStr);
76    return (jint)result;
77}
78
79static jint android_net_utils_addHostRoute(JNIEnv* env, jobject clazz, jstring ifname, jint addr)
80{
81    int result;
82
83    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
84    result = ::ifc_add_host_route(nameStr, addr);
85    env->ReleaseStringUTFChars(ifname, nameStr);
86    return (jint)result;
87}
88
89static jint android_net_utils_removeHostRoutes(JNIEnv* env, jobject clazz, jstring ifname)
90{
91    int result;
92
93    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
94    result = ::ifc_remove_host_routes(nameStr);
95    env->ReleaseStringUTFChars(ifname, nameStr);
96    return (jint)result;
97}
98
99static jint android_net_utils_setDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname, jint gateway)
100{
101    int result;
102
103    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
104    result = ::ifc_set_default_route(nameStr, gateway);
105    env->ReleaseStringUTFChars(ifname, nameStr);
106    return (jint)result;
107}
108
109static jint android_net_utils_getDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname)
110{
111    int result;
112
113    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
114    result = ::ifc_get_default_route(nameStr);
115    env->ReleaseStringUTFChars(ifname, nameStr);
116    return (jint)result;
117}
118
119static jint android_net_utils_removeDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname)
120{
121    int result;
122
123    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
124    result = ::ifc_remove_default_route(nameStr);
125    env->ReleaseStringUTFChars(ifname, nameStr);
126    return (jint)result;
127}
128
129static jint android_net_utils_resetConnections(JNIEnv* env, jobject clazz, jstring ifname)
130{
131    int result;
132
133    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
134    result = ::ifc_reset_connections(nameStr);
135    env->ReleaseStringUTFChars(ifname, nameStr);
136    return (jint)result;
137}
138
139static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info)
140{
141    int result;
142    in_addr_t ipaddr, gateway, mask, dns1, dns2, server;
143    uint32_t lease;
144
145    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
146    result = ::dhcp_do_request(nameStr, &ipaddr, &gateway, &mask,
147                                        &dns1, &dns2, &server, &lease);
148    env->ReleaseStringUTFChars(ifname, nameStr);
149    if (result == 0 && dhcpInfoFieldIds.dhcpInfoClass != NULL) {
150        env->SetIntField(info, dhcpInfoFieldIds.ipaddress, ipaddr);
151        env->SetIntField(info, dhcpInfoFieldIds.gateway, gateway);
152        env->SetIntField(info, dhcpInfoFieldIds.netmask, mask);
153        env->SetIntField(info, dhcpInfoFieldIds.dns1, dns1);
154        env->SetIntField(info, dhcpInfoFieldIds.dns2, dns2);
155        env->SetIntField(info, dhcpInfoFieldIds.serverAddress, server);
156        env->SetIntField(info, dhcpInfoFieldIds.leaseDuration, lease);
157    }
158    return (jboolean)(result == 0);
159}
160
161static jboolean android_net_utils_stopDhcp(JNIEnv* env, jobject clazz, jstring ifname)
162{
163    int result;
164
165    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
166    result = ::dhcp_stop(nameStr);
167    env->ReleaseStringUTFChars(ifname, nameStr);
168    return (jboolean)(result == 0);
169}
170
171static jboolean android_net_utils_releaseDhcpLease(JNIEnv* env, jobject clazz, jstring ifname)
172{
173    int result;
174
175    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
176    result = ::dhcp_release_lease(nameStr);
177    env->ReleaseStringUTFChars(ifname, nameStr);
178    return (jboolean)(result == 0);
179}
180
181static jstring android_net_utils_getDhcpError(JNIEnv* env, jobject clazz)
182{
183    return env->NewStringUTF(::dhcp_get_errmsg());
184}
185
186static jboolean android_net_utils_configureInterface(JNIEnv* env,
187        jobject clazz,
188        jstring ifname,
189        jint ipaddr,
190        jint mask,
191        jint gateway,
192        jint dns1,
193        jint dns2)
194{
195    int result;
196    uint32_t lease;
197
198    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
199    result = ::ifc_configure(nameStr, ipaddr, mask, gateway, dns1, dns2);
200    env->ReleaseStringUTFChars(ifname, nameStr);
201    return (jboolean)(result == 0);
202}
203
204// ----------------------------------------------------------------------------
205
206/*
207 * JNI registration.
208 */
209static JNINativeMethod gNetworkUtilMethods[] = {
210    /* name, signature, funcPtr */
211
212    { "disableInterface", "(Ljava/lang/String;)I",  (void *)android_net_utils_disableInterface },
213    { "addHostRoute", "(Ljava/lang/String;I)I",  (void *)android_net_utils_addHostRoute },
214    { "removeHostRoutes", "(Ljava/lang/String;)I",  (void *)android_net_utils_removeHostRoutes },
215    { "setDefaultRoute", "(Ljava/lang/String;I)I",  (void *)android_net_utils_setDefaultRoute },
216    { "getDefaultRoute", "(Ljava/lang/String;)I",  (void *)android_net_utils_getDefaultRoute },
217    { "removeDefaultRoute", "(Ljava/lang/String;)I",  (void *)android_net_utils_removeDefaultRoute },
218    { "resetConnections", "(Ljava/lang/String;)I",  (void *)android_net_utils_resetConnections },
219    { "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpInfo;)Z",  (void *)android_net_utils_runDhcp },
220    { "stopDhcp", "(Ljava/lang/String;)Z",  (void *)android_net_utils_stopDhcp },
221    { "releaseDhcpLease", "(Ljava/lang/String;)Z",  (void *)android_net_utils_releaseDhcpLease },
222    { "configureNative", "(Ljava/lang/String;IIIII)Z",  (void *)android_net_utils_configureInterface },
223    { "getDhcpError", "()Ljava/lang/String;", (void*) android_net_utils_getDhcpError },
224};
225
226int register_android_net_NetworkUtils(JNIEnv* env)
227{
228    jclass netutils = env->FindClass(NETUTILS_PKG_NAME);
229    LOG_FATAL_IF(netutils == NULL, "Unable to find class " NETUTILS_PKG_NAME);
230
231    dhcpInfoFieldIds.dhcpInfoClass = env->FindClass("android/net/DhcpInfo");
232    if (dhcpInfoFieldIds.dhcpInfoClass != NULL) {
233        dhcpInfoFieldIds.constructorId = env->GetMethodID(dhcpInfoFieldIds.dhcpInfoClass, "<init>", "()V");
234        dhcpInfoFieldIds.ipaddress = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "ipAddress", "I");
235        dhcpInfoFieldIds.gateway = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "gateway", "I");
236        dhcpInfoFieldIds.netmask = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "netmask", "I");
237        dhcpInfoFieldIds.dns1 = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "dns1", "I");
238        dhcpInfoFieldIds.dns2 = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "dns2", "I");
239        dhcpInfoFieldIds.serverAddress = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "serverAddress", "I");
240        dhcpInfoFieldIds.leaseDuration = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "leaseDuration", "I");
241    }
242
243    return AndroidRuntime::registerNativeMethods(env,
244            NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods));
245}
246
247}; // namespace android
248