#include "caipinterface.h"
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
#include <sys/types.h>
+#include <sys/select.h>
#include <ifaddrs.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
#include <net/if.h>
-#include <sys/socket.h>
#include <netdb.h>
-#include <string.h>
#include <errno.h>
-#include <unistd.h>
+#ifdef __linux__
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#endif
+
+#include "camutex.h"
#include "caadapterutils.h"
#include "logger.h"
#include "oic_malloc.h"
#define TAG "OIC_CA_IP_MONITOR"
-CAResult_t CAIPStartNetworkMonitor()
+/**
+ * Mutex for synchronizing access to cached interface and IP address information.
+ */
+static ca_mutex g_networkMonitorContextMutex = NULL;
+
+/**
+ * Used to storing network interface.
+ */
+static u_arraylist_t *g_netInterfaceList = NULL;
+
+static CAIPConnectionStateChangeCallback g_networkChangeCallback = NULL;
+
+static CAResult_t CAIPInitializeNetworkMonitorList();
+static void CAIPDestroyNetworkMonitorList();
+static CAInterface_t *CANewInterfaceItem(int index, const char *name, int family,
+ uint32_t addr, int flags);
+
+static CAResult_t CAIPInitializeNetworkMonitorList()
+{
+ if (!g_networkMonitorContextMutex)
+ {
+ g_networkMonitorContextMutex = ca_mutex_new();
+ if (!g_networkMonitorContextMutex)
+ {
+ OIC_LOG(ERROR, TAG, "ca_mutex_new has failed");
+ return CA_STATUS_FAILED;
+ }
+ }
+
+ if (!g_netInterfaceList)
+ {
+ g_netInterfaceList = u_arraylist_create();
+ if (!g_netInterfaceList)
+ {
+ OIC_LOG(ERROR, TAG, "u_arraylist_create has failed");
+ CAIPDestroyNetworkMonitorList();
+ return CA_STATUS_FAILED;
+ }
+ }
+}
+
+static void CAIPDestroyNetworkMonitorList()
+{
+ if (g_netInterfaceList)
+ {
+ u_arraylist_destroy(g_netInterfaceList);
+ g_netInterfaceList = NULL;
+ }
+
+ if (g_networkMonitorContextMutex)
+ {
+ ca_mutex_free(g_networkMonitorContextMutex);
+ g_networkMonitorContextMutex = NULL;
+ }
+}
+
+static bool CACmpNetworkList(uint32_t ifiindex)
+{
+ if (!g_netInterfaceList)
+ {
+ OIC_LOG(ERROR, TAG, "g_netInterfaceList is NULL");
+ return false;
+ }
+
+ ca_mutex_lock(g_networkMonitorContextMutex);
+
+ uint32_t list_length = u_arraylist_length(g_netInterfaceList);
+ for (uint32_t list_index = 0; list_index < list_length; list_index++)
+ {
+ CAInterface_t *currItem = (CAInterface_t *) u_arraylist_get(g_netInterfaceList, list_index);
+ if (currItem->index == ifiindex)
+ {
+ ca_mutex_unlock(g_networkMonitorContextMutex);
+ return true;
+ }
+ }
+ ca_mutex_unlock(g_networkMonitorContextMutex);
+ return false;
+}
+
+static CAResult_t CAAddNetworkMonitorList(CAInterface_t *ifitem)
{
+ VERIFY_NON_NULL(g_netInterfaceList, TAG, "g_netInterfaceList is NULL");
+ VERIFY_NON_NULL(ifitem, TAG, "ifitem is NULL");
+
+ ca_mutex_lock(g_networkMonitorContextMutex);
+ bool result = u_arraylist_add(g_netInterfaceList, (void *) ifitem);
+ if (!result)
+ {
+ OIC_LOG(ERROR, TAG, "u_arraylist_add failed.");
+ ca_mutex_unlock(g_networkMonitorContextMutex);
+ return CA_STATUS_FAILED;
+ }
+ ca_mutex_unlock(g_networkMonitorContextMutex);
return CA_STATUS_OK;
}
+static void CARemoveNetworkMonitorList(int ifiindex)
+{
+ VERIFY_NON_NULL_VOID(g_netInterfaceList, TAG, "g_netInterfaceList is NULL");
+
+ ca_mutex_lock(g_networkMonitorContextMutex);
+
+ uint32_t list_length = u_arraylist_length(g_netInterfaceList);
+ for (uint32_t list_index = 0; list_index < list_length; list_index++)
+ {
+ CAInterface_t *removedifitem = (CAInterface_t *) u_arraylist_get(
+ g_netInterfaceList, list_index);
+ if (removedifitem && removedifitem->index == ifiindex)
+ {
+ if (u_arraylist_remove(g_netInterfaceList, list_index))
+ {
+ OICFree(removedifitem);
+ ca_mutex_unlock(g_networkMonitorContextMutex);
+ return;
+ }
+ continue;
+ }
+ }
+ ca_mutex_unlock(g_networkMonitorContextMutex);
+ return;
+}
+
+CAResult_t CAIPStartNetworkMonitor()
+{
+ return CAIPInitializeNetworkMonitorList();
+}
+
CAResult_t CAIPStopNetworkMonitor()
{
+ CAIPDestroyNetworkMonitorList();
return CA_STATUS_OK;
}
return interval;
}
+void CAIPSetNetworkMonitorCallback(CAIPConnectionStateChangeCallback callback)
+{
+ g_networkChangeCallback = callback;
+}
+
+static CAInterface_t *CANewInterfaceItem(int index, const char *name, int family,
+ uint32_t addr, int flags)
+{
+ CAInterface_t *ifitem = (CAInterface_t *)OICCalloc(1, sizeof (CAInterface_t));
+ if (!ifitem)
+ {
+ OIC_LOG(ERROR, TAG, "Malloc failed");
+ return NULL;
+ }
+
+ OICStrcpy(ifitem->name, sizeof (ifitem->name), name);
+ ifitem->index = index;
+ ifitem->family = family;
+ ifitem->ipv4addr = addr;
+ ifitem->flags = flags;
+
+ return ifitem;
+}
+
CAInterface_t *CAFindInterfaceChange()
{
- return NULL;
+ CAInterface_t *foundNewInterface = NULL;
+#ifdef __linux__
+ char buf[4096];
+ struct nlmsghdr *nh;
+ struct sockaddr_nl sa;
+ struct iovec iov = { buf, sizeof (buf) };
+ struct msghdr msg = { (void *)&sa, sizeof (sa), &iov, 1, NULL, 0, 0 };
+
+ size_t len = recvmsg(caglobals.ip.netlinkFd, &msg, 0);
+
+ for (nh = (struct nlmsghdr *)buf; NLMSG_OK(nh, len); nh = NLMSG_NEXT(nh, len))
+ {
+ if (nh != NULL && nh->nlmsg_type != RTM_NEWLINK)
+ {
+ continue;
+ }
+
+ struct ifinfomsg *ifi = (struct ifinfomsg *)NLMSG_DATA(nh);
+
+ int ifiIndex = ifi->ifi_index;
+ u_arraylist_t *iflist = CAIPGetInterfaceInformation(ifiIndex);
+
+ if ((!ifi || (ifi->ifi_flags & IFF_LOOPBACK) || !(ifi->ifi_flags & IFF_RUNNING)))
+ {
+ bool isFound = CACmpNetworkList(ifiIndex);
+ if (isFound)
+ {
+ CARemoveNetworkMonitorList(ifiIndex);
+ if (g_networkChangeCallback)
+ {
+ g_networkChangeCallback(CA_ADAPTER_IP ,CA_INTERFACE_DOWN);
+ }
+ }
+ continue;
+ }
+
+ if (!iflist)
+ {
+ OIC_LOG_V(ERROR, TAG, "get interface info failed: %s", strerror(errno));
+ return NULL;
+ }
+
+ uint32_t listLength = u_arraylist_length(iflist);
+ for (uint32_t i = 0; i < listLength; i++)
+ {
+ CAInterface_t *ifitem = (CAInterface_t *)u_arraylist_get(iflist, i);
+ if (!ifitem)
+ {
+ continue;
+ }
+
+ if ((int)ifitem->index != ifiIndex)
+ {
+ continue;
+ }
+
+ foundNewInterface = CANewInterfaceItem(ifitem->index, ifitem->name, ifitem->family,
+ ifitem->ipv4addr, ifitem->flags);
+ break; // we found the one we were looking for
+ }
+ u_arraylist_destroy(iflist);
+ }
+#endif
+ return foundNewInterface;
}
u_arraylist_t *CAIPGetInterfaceInformation(int desiredIndex)
goto exit;
}
- OIC_LOG_V(DEBUG, TAG, "Added interface: %s (%d)", ifitem->name, family);
+ bool isFound = CACmpNetworkList(ifitem->index);
+ if (!isFound)
+ {
+ CAInterface_t *newifitem = CANewInterfaceItem(ifitem->index, ifitem->name, ifitem->family,
+ ifitem->ipv4addr, ifitem->flags);
+ CAResult_t ret = CAAddNetworkMonitorList(newifitem);
+ if (CA_STATUS_OK != ret)
+ {
+ OICFree(newifitem);
+ goto exit;
+ }
+ if (g_networkChangeCallback)
+ {
+ g_networkChangeCallback(CA_ADAPTER_IP, CA_INTERFACE_UP);
+ }
+ OIC_LOG_V(DEBUG, TAG, "Added interface: %s (%d)", ifitem->name, ifitem->family);
+ }
}
-
freeifaddrs(ifp);
return iflist;
projects / platform / upstream / iotivity.git / blobdiff