resource/csdk/connectivity/src/ip_adapter/android/caipnwmonitor.c

   1 /******************************************************************
   2 *
   3 * Copyright 2014 Samsung Electronics All Rights Reserved.
   4 *
   5 *
   6 *
   7 * Licensed under the Apache License, Version 2.0 (the "License");
   8 * you may not use this file except in compliance with the License.
   9 * You may obtain a copy of the License at
  10 *
  11 *      http://www.apache.org/licenses/LICENSE-2.0
  12 *
  13 * Unless required by applicable law or agreed to in writing, software
  14 * distributed under the License is distributed on an "AS IS" BASIS,
  15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 * See the License for the specific language governing permissions and
  17 * limitations under the License.
  18 *
  19 ******************************************************************/
  20
  21 #include "caipinterface.h"
  22
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <netdb.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <unistd.h>
  29
  30 #include <arpa/inet.h>
  31 #include <linux/if.h>
  32
  33 #include "caadapterutils.h"
  34 #include "logger.h"
  35 #include "oic_malloc.h"
  36 #include "oic_string.h"
  37 #include "org_iotivity_ca_CaIpInterface.h"
  38
  39 #define TAG "OIC_CA_IP_MONITOR"
  40
  41 static CAIPConnectionStateChangeCallback g_networkChangeCallback;
  42
  43 static CAInterface_t *CANewInterfaceItem(int index, const char *name, int family,
  44                                          uint32_t addr, int flags);
  45
  46 static CAResult_t CAAddInterfaceItem(u_arraylist_t *iflist, int index,
  47                             const char *name, int family, uint32_t addr, int flags);
  48
  49 CAResult_t CAIPJniInit();
  50
  51 /**
  52  * destroy JNI interface.
  53  * @return  ::CA_STATUS_OK or ERROR CODES (::CAResult_t error codes in cacommon.h).
  54  */
  55 static CAResult_t CAIPDestroyJniInterface();
  56
  57 #define MAX_INTERFACE_INFO_LENGTH 1024 // allows 32 interfaces from SIOCGIFCONF
  58
  59 CAResult_t CAIPStartNetworkMonitor()
  60 {
  61     return CAIPJniInit();
  62 }
  63
  64 CAResult_t CAIPStopNetworkMonitor()
  65 {
  66     return CAIPDestroyJniInterface();
  67 }
  68
  69 int CAGetPollingInterval(int interval)
  70 {
  71     return interval;
  72 }
  73
  74 void CAIPSetNetworkMonitorCallback(CAIPConnectionStateChangeCallback callback)
  75 {
  76     g_networkChangeCallback = callback;
  77 }
  78
  79 CAInterface_t *CAFindInterfaceChange()
  80 {
  81     char buf[MAX_INTERFACE_INFO_LENGTH] = { 0 };
  82     struct ifconf ifc  = { .ifc_len = MAX_INTERFACE_INFO_LENGTH, .ifc_buf = buf };
  83
  84     int s = caglobals.ip.u6.fd != -1 ? caglobals.ip.u6.fd : caglobals.ip.u4.fd;
  85     if (ioctl(s, SIOCGIFCONF, &ifc) < 0)
  86     {
  87         OIC_LOG_V(ERROR, TAG, "SIOCGIFCONF failed: %s", strerror(errno));
  88         return NULL;
  89     }
  90
  91     CAInterface_t *foundNewInterface = NULL;
  92
  93     struct ifreq* ifr = ifc.ifc_req;
  94     size_t interfaces = ifc.ifc_len / sizeof (ifc.ifc_req[0]);
  95     size_t ifreqsize = ifc.ifc_len;
  96
  97     CAIfItem_t *previous = (CAIfItem_t *)OICMalloc(ifreqsize);
  98     if (!previous)
  99     {
 100         OIC_LOG(ERROR, TAG, "OICMalloc failed");
 101         return NULL;
 102     }
 103
 104     memcpy(previous, caglobals.ip.nm.ifItems, ifreqsize);
 105     size_t numprevious = caglobals.ip.nm.numIfItems;
 106
 107     if (ifreqsize > caglobals.ip.nm.sizeIfItems)
 108     {
 109
 110         CAIfItem_t *items = (CAIfItem_t *)OICRealloc(caglobals.ip.nm.ifItems, ifreqsize);
 111         if (!items)
 112         {
 113             OIC_LOG(ERROR, TAG, "OICRealloc failed");
 114             OICFree(previous);
 115             return NULL;
 116         }
 117         caglobals.ip.nm.ifItems = items;
 118         caglobals.ip.nm.sizeIfItems = ifreqsize;
 119     }
 120
 121     caglobals.ip.nm.numIfItems = 0;
 122     for (size_t i = 0; i < interfaces; i++)
 123     {
 124         struct ifreq* item = &ifr[i];
 125         char *name = item->ifr_name;
 126         struct sockaddr_in *sa4 = (struct sockaddr_in *)&item->ifr_addr;
 127         uint32_t ipv4addr = sa4->sin_addr.s_addr;
 128
 129         if (ioctl(s, SIOCGIFFLAGS, item) < 0)
 130         {
 131             OIC_LOG_V(ERROR, TAG, "SIOCGIFFLAGS failed: %s", strerror(errno));
 132             continue;
 133         }
 134         int16_t flags = item->ifr_flags;
 135         if ((flags & IFF_LOOPBACK) || !(flags & IFF_RUNNING))
 136         {
 137             continue;
 138         }
 139         if (ioctl(s, SIOCGIFINDEX, item) < 0)
 140         {
 141             OIC_LOG_V(ERROR, TAG, "SIOCGIFINDEX failed: %s", strerror(errno));
 142             continue;
 143         }
 144
 145         int ifIndex = item->ifr_ifindex;
 146         caglobals.ip.nm.ifItems[i].ifIndex = ifIndex;  // refill interface list
 147         caglobals.ip.nm.numIfItems++;
 148
 149         if (foundNewInterface)
 150         {
 151             continue;   // continue updating interface list
 152         }
 153
 154         // see if this interface didn't previously exist
 155         bool found = false;
 156         for (size_t j = 0; j < numprevious; j++)
 157         {
 158             if (ifIndex == previous[j].ifIndex)
 159             {
 160                 found = true;
 161                 break;
 162             }
 163         }
 164         if (found)
 165         {
 166             OIC_LOG_V(INFO, TAG, "Interface found: %s", name);
 167             continue;
 168         }
 169
 170         foundNewInterface = CANewInterfaceItem(ifIndex, name, AF_INET, ipv4addr, flags);
 171     }
 172
 173     OICFree(previous);
 174     return foundNewInterface;
 175 }
 176
 177 u_arraylist_t *CAIPGetInterfaceInformation(int desiredIndex)
 178 {
 179     u_arraylist_t *iflist = u_arraylist_create();
 180     if (!iflist)
 181     {
 182         OIC_LOG_V(ERROR, TAG, "Failed to create iflist: %s", strerror(errno));
 183         return NULL;
 184     }
 185
 186     char buf[MAX_INTERFACE_INFO_LENGTH] = { 0 };
 187     struct ifconf ifc = { .ifc_len = MAX_INTERFACE_INFO_LENGTH, .ifc_buf = buf };
 188
 189     int s = caglobals.ip.u6.fd != -1 ? caglobals.ip.u6.fd : caglobals.ip.u4.fd;
 190     if (ioctl(s, SIOCGIFCONF, &ifc) < 0)
 191     {
 192         OIC_LOG_V(ERROR, TAG, "SIOCGIFCONF failed: %s", strerror(errno));
 193         u_arraylist_destroy(iflist);
 194         return NULL;
 195     }
 196
 197     struct ifreq* ifr = ifc.ifc_req;
 198     size_t interfaces = ifc.ifc_len / sizeof (ifc.ifc_req[0]);
 199     size_t ifreqsize = ifc.ifc_len;
 200
 201     if (ifreqsize > caglobals.ip.nm.sizeIfItems)
 202     {
 203         CAIfItem_t *items = (CAIfItem_t *)OICRealloc(caglobals.ip.nm.ifItems, ifreqsize);
 204         if (!items)
 205         {
 206             OIC_LOG(ERROR, TAG, "OICRealloc failed");
 207             goto exit;
 208         }
 209         caglobals.ip.nm.ifItems = items;
 210         caglobals.ip.nm.sizeIfItems = ifreqsize;
 211     }
 212
 213     caglobals.ip.nm.numIfItems = 0;
 214     for (size_t i = 0; i < interfaces; i++)
 215     {
 216         CAResult_t result = CA_STATUS_OK;
 217         struct ifreq* item = &ifr[i];
 218         char *name = item->ifr_name;
 219         struct sockaddr_in *sa4 = (struct sockaddr_in *)&item->ifr_addr;
 220         uint32_t ipv4addr = sa4->sin_addr.s_addr;
 221
 222         if (ioctl(s, SIOCGIFFLAGS, item) < 0)
 223         {
 224             OIC_LOG_V(ERROR, TAG, "SIOCGIFFLAGS failed: %s", strerror(errno));
 225             continue;
 226         }
 227         int16_t flags = item->ifr_flags;
 228         if ((flags & IFF_LOOPBACK) || !(flags & IFF_RUNNING))
 229         {
 230             continue;
 231         }
 232         if (ioctl(s, SIOCGIFINDEX, item) < 0)
 233         {
 234             OIC_LOG_V(ERROR, TAG, "SIOCGIFINDEX failed: %s", strerror(errno));
 235             continue;
 236         }
 237
 238         int ifindex = item->ifr_ifindex;
 239         caglobals.ip.nm.ifItems[i].ifIndex = ifindex;
 240         caglobals.ip.nm.numIfItems++;
 241
 242         if (desiredIndex && (ifindex != desiredIndex))
 243         {
 244             continue;
 245         }
 246
 247         // Add IPv4 interface
 248         result = CAAddInterfaceItem(iflist, ifindex, name, AF_INET, ipv4addr, flags);
 249         if (CA_STATUS_OK != result)
 250         {
 251             goto exit;
 252         }
 253
 254         // Add IPv6 interface
 255         result = CAAddInterfaceItem(iflist, ifindex, name, AF_INET6, ipv4addr, flags);
 256         if (CA_STATUS_OK != result)
 257         {
 258             goto exit;
 259         }
 260     }
 261     return iflist;
 262
 263 exit:
 264     u_arraylist_destroy(iflist);
 265     return NULL;
 266 }
 267
 268 static CAResult_t CAAddInterfaceItem(u_arraylist_t *iflist, int index,
 269                             const char *name, int family, uint32_t addr, int flags)
 270 {
 271     CAInterface_t *ifitem = CANewInterfaceItem(index, name, family, addr, flags);
 272     if (!ifitem)
 273     {
 274         return CA_STATUS_FAILED;
 275     }
 276     bool result = u_arraylist_add(iflist, ifitem);
 277     if (!result)
 278     {
 279         OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
 280         OICFree(ifitem);
 281         return CA_STATUS_FAILED;
 282     }
 283
 284     return CA_STATUS_OK;
 285 }
 286
 287 static CAInterface_t *CANewInterfaceItem(int index, const char *name, int family,
 288                                          uint32_t addr, int flags)
 289 {
 290     CAInterface_t *ifitem = (CAInterface_t *)OICCalloc(1, sizeof (CAInterface_t));
 291     if (!ifitem)
 292     {
 293         OIC_LOG(ERROR, TAG, "Malloc failed");
 294         return NULL;
 295     }
 296
 297     OICStrcpy(ifitem->name, sizeof (ifitem->name), name);
 298     ifitem->index = index;
 299     ifitem->family = family;
 300     ifitem->ipv4addr = addr;
 301     ifitem->flags = flags;
 302
 303     return ifitem;
 304 }
 305
 306 CAResult_t CAIPJniInit()
 307 {
 308     OIC_LOG(DEBUG, TAG, "CAIPJniInit_IN");
 309
 310     JavaVM *jvm = CANativeJNIGetJavaVM();
 311     if (!jvm)
 312     {
 313         OIC_LOG(ERROR, TAG, "Could not get JavaVM pointer");
 314         return CA_STATUS_FAILED;
 315     }
 316
 317     jobject context = CANativeJNIGetContext();
 318     if (!context)
 319     {
 320         OIC_LOG(ERROR, TAG, "unable to get application context");
 321         return CA_STATUS_FAILED;
 322     }
 323
 324     JNIEnv* env;
 325     if ((*jvm)->GetEnv(jvm, (void**) &env, JNI_VERSION_1_6) != JNI_OK)
 326     {
 327         OIC_LOG(ERROR, TAG, "Could not get JNIEnv pointer");
 328         return CA_STATUS_FAILED;
 329     }
 330
 331     jmethodID mid_getApplicationContext = CAGetJNIMethodID(env, "android/content/Context",
 332                                                            "getApplicationContext",
 333                                                            "()Landroid/content/Context;");
 334
 335     if (!mid_getApplicationContext)
 336     {
 337         OIC_LOG(ERROR, TAG, "Could not get getApplicationContext method");
 338         return CA_STATUS_FAILED;
 339     }
 340
 341     jobject jApplicationContext = (*env)->CallObjectMethod(env, context,
 342                                                            mid_getApplicationContext);
 343     if (!jApplicationContext)
 344     {
 345         OIC_LOG(ERROR, TAG, "Could not get application context");
 346         return CA_STATUS_FAILED;
 347     }
 348
 349     jclass cls_CaIpInterface = (*env)->FindClass(env, "org/iotivity/ca/CaIpInterface");
 350     if (!cls_CaIpInterface)
 351     {
 352         OIC_LOG(ERROR, TAG, "Could not get CaIpInterface class");
 353         return CA_STATUS_FAILED;
 354     }
 355
 356     jmethodID mid_CaIpInterface_ctor = (*env)->GetMethodID(env, cls_CaIpInterface, "<init>",
 357                                                                    "(Landroid/content/Context;)V");
 358     if (!mid_CaIpInterface_ctor)
 359     {
 360         OIC_LOG(ERROR, TAG, "Could not get CaIpInterface constructor method");
 361         return CA_STATUS_FAILED;
 362     }
 363
 364     (*env)->NewObject(env, cls_CaIpInterface, mid_CaIpInterface_ctor, jApplicationContext);
 365     OIC_LOG(DEBUG, TAG, "Create CaIpInterface instance, success");
 366
 367     OIC_LOG(DEBUG, TAG, "CAIPJniInit_OUT");
 368     return CA_STATUS_OK;
 369 }
 370
 371 static CAResult_t CAIPDestroyJniInterface()
 372 {
 373     OIC_LOG(DEBUG, TAG, "CAIPDestroyJniInterface");
 374
 375     JavaVM *jvm = CANativeJNIGetJavaVM();
 376     if (!jvm)
 377     {
 378         OIC_LOG(ERROR, TAG, "Could not get JavaVM pointer");
 379         return CA_STATUS_FAILED;
 380     }
 381
 382     bool isAttached = false;
 383     JNIEnv* env;
 384     jint res = (*jvm)->GetEnv(jvm, (void**) &env, JNI_VERSION_1_6);
 385     if (JNI_OK != res)
 386     {
 387         OIC_LOG(INFO, TAG, "Could not get JNIEnv pointer");
 388         res = (*jvm)->AttachCurrentThread(jvm, &env, NULL);
 389
 390         if (JNI_OK != res)
 391         {
 392             OIC_LOG(ERROR, TAG, "AttachCurrentThread has failed");
 393             return CA_STATUS_FAILED;
 394         }
 395         isAttached = true;
 396     }
 397
 398     jclass jni_IpInterface = (*env)->FindClass(env, "org/iotivity/ca/CaIpInterface");
 399     if (!jni_IpInterface)
 400     {
 401         OIC_LOG(ERROR, TAG, "Could not get CaIpInterface class");
 402         goto error_exit;
 403     }
 404
 405     jmethodID jni_InterfaceDestroyMethod = (*env)->GetStaticMethodID(env, jni_IpInterface,
 406                                                                      "destroyIpInterface",
 407                                                                      "()V");
 408     if (!jni_InterfaceDestroyMethod)
 409     {
 410         OIC_LOG(ERROR, TAG, "Could not get CaIpInterface destroy method");
 411         goto error_exit;
 412     }
 413
 414     (*env)->CallStaticVoidMethod(env, jni_IpInterface, jni_InterfaceDestroyMethod);
 415
 416     if ((*env)->ExceptionCheck(env))
 417     {
 418         OIC_LOG(ERROR, TAG, "destroyIpInterface has failed");
 419         (*env)->ExceptionDescribe(env);
 420         (*env)->ExceptionClear(env);
 421         goto error_exit;
 422     }
 423
 424     OIC_LOG(DEBUG, TAG, "Destroy instance for CaIpInterface");
 425
 426     if (isAttached)
 427     {
 428         (*jvm)->DetachCurrentThread(jvm);
 429     }
 430
 431     return CA_STATUS_OK;
 432
 433 error_exit:
 434
 435     if (isAttached)
 436     {
 437         (*jvm)->DetachCurrentThread(jvm);
 438     }
 439
 440     return CA_STATUS_FAILED;
 441 }
 442
 443 JNIEXPORT void JNICALL
 444 Java_org_iotivity_ca_CaIpInterface_caIpStateEnabled(JNIEnv *env, jclass class)
 445 {
 446     (void)env;
 447     (void)class;
 448
 449     OIC_LOG(DEBUG, TAG, "Wifi is in Activated State");
 450     g_networkChangeCallback(CA_ADAPTER_IP, CA_INTERFACE_UP);
 451 }
 452
 453 JNIEXPORT void JNICALL
 454 Java_org_iotivity_ca_CaIpInterface_caIpStateDisabled(JNIEnv *env, jclass class)
 455 {
 456     (void)env;
 457     (void)class;
 458
 459     OIC_LOG(DEBUG, TAG, "Wifi is in Deactivated State");
 460     g_networkChangeCallback(CA_ADAPTER_IP, CA_INTERFACE_DOWN);
 461 }