diff options
Diffstat (limited to 'native/jni/java-net/java_net_VMNetworkInterface.c')
| -rw-r--r-- | native/jni/java-net/java_net_VMNetworkInterface.c | 204 |
1 files changed, 194 insertions, 10 deletions
diff --git a/native/jni/java-net/java_net_VMNetworkInterface.c b/native/jni/java-net/java_net_VMNetworkInterface.c index f05e9fcc5..203f6acd0 100644 --- a/native/jni/java-net/java_net_VMNetworkInterface.c +++ b/native/jni/java-net/java_net_VMNetworkInterface.c @@ -35,9 +35,15 @@ this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ -/* do not move; needed here because of some macro definitions */ +#ifdef HAVE_CONFIG_H #include <config.h> +#endif /* HAVE_CONFIG_H */ +#include <sys/types.h> +#include <sys/socket.h> +#include <ifaddrs.h> +#include <netinet/in.h> +#include <errno.h> #include <stdlib.h> #include <stdio.h> #include <string.h> @@ -47,19 +53,197 @@ exception statement from your version. */ #include "java_net_VMNetworkInterface.h" -#include "javanet.h" + +static jmethodID java_net_VMNetworkInterface_init; +static jmethodID java_net_VMNetworkInterface_addAddress; /* - * Returns all local network interfaces as vector + * Initialize our static method ID's. + * + * Class: java_net_VMNetworkInterface + * Method: initIds + * Signature: ()V */ -JNIEXPORT jobject JNICALL -Java_java_net_VMNetworkInterface_getInterfaces (JNIEnv * env, - jclass class - __attribute__ ((__unused__))) +JNIEXPORT void JNICALL +Java_java_net_VMNetworkInterface_initIds (JNIEnv *env, jclass clazz) +{ + java_net_VMNetworkInterface_init = + (*env)->GetMethodID (env, clazz, "<init>", "(Ljava/lang/String;)V"); + if (java_net_VMNetworkInterface_init == NULL) + { + if (!(*env)->ExceptionCheck (env)) + JCL_ThrowException (env, "java/lang/NoSuchMethodError", + "VMNetworkinterface.addAddress"); + return; + } + java_net_VMNetworkInterface_addAddress = + (*env)->GetMethodID (env, clazz, "addAddress", "(Ljava/nio/ByteBuffer;)V"); + if (java_net_VMNetworkInterface_addAddress == NULL) + { + if (!(*env)->ExceptionCheck (env)) + JCL_ThrowException (env, "java/lang/NoSuchMethodError", + "VMNetworkinterface.addAddress"); + } +} + +struct netif_entry +{ + char *name; + jobject netif; + int numaddrs; + struct netif_entry *next; +}; + +static void +free_netif_list (JNIEnv *env, struct netif_entry *list) { - JCL_ThrowException (env, IO_EXCEPTION, - "java.net.VMNetworkInterface.getInterfaces(): not implemented"); - return 0; + while (list != NULL) + { + struct netif_entry *e = list->next; + JCL_free (env, list); + list = e; + } +} + +/* + * Returns all local network interfaces as an array. + */ +JNIEXPORT jobjectArray JNICALL +Java_java_net_VMNetworkInterface_getVMInterfaces (JNIEnv * env, jclass clazz) +{ +#ifdef HAVE_GETIFADDRS + struct ifaddrs *ifaddrs, *i; + struct netif_entry *iflist = NULL, *e; + jobjectArray netifs; + int numifs = 0; + int k; + + if (getifaddrs (&ifaddrs) == -1) + { + JCL_ThrowException (env, "java/net/SocketException", strerror (errno)); + return NULL; + } + + for (i = ifaddrs; i != NULL; i = i->ifa_next) + { + if (iflist == NULL) + { + iflist = JCL_malloc (env, sizeof (struct netif_entry)); + if (iflist == NULL) + { + freeifaddrs (ifaddrs); + return NULL; + } + iflist->name = i->ifa_name; + iflist->numaddrs = 0; + iflist->next = NULL; + iflist->netif = (*env)->NewObject (env, clazz, java_net_VMNetworkInterface_init, + (*env)->NewStringUTF (env, i->ifa_name)); + if (iflist->netif == NULL) + { + freeifaddrs (ifaddrs); + JCL_free (env, iflist); + return NULL; + } + e = iflist; + } + else + { + struct netif_entry *p = NULL; + for (e = iflist; e != NULL; e = e->next) + { + if (strcmp (e->name, i->ifa_name) == 0) + break; + p = e; + } + + if (e == NULL) + { + p->next = (struct netif_entry *) JCL_malloc (env, sizeof (struct netif_entry)); + if (p->next == NULL) + { + free_netif_list (env, iflist); + freeifaddrs (ifaddrs); + return NULL; + } + e = p->next; + e->name = i->ifa_name; + e->numaddrs = 0; + e->next = NULL; + e->netif = (*env)->NewObject (env, clazz, java_net_VMNetworkInterface_init, + (*env)->NewStringUTF (env, i->ifa_name)); + if (e->netif == NULL) + { + free_netif_list (env, iflist); + freeifaddrs (ifaddrs); + return NULL; + } + } + } + + if (i->ifa_addr == NULL) + continue; + + if (i->ifa_addr->sa_family == AF_INET) + { + struct sockaddr_in *sin = (struct sockaddr_in *) i->ifa_addr; + jobject buffer = (*env)->NewDirectByteBuffer (env, &(sin->sin_addr.s_addr), 4); + (*env)->CallVoidMethod (env, e->netif, java_net_VMNetworkInterface_addAddress, + buffer); + if ((*env)->ExceptionCheck (env)) + { + free_netif_list (env, iflist); + freeifaddrs (ifaddrs); + return NULL; + } + (*env)->DeleteLocalRef (env, buffer); + e->numaddrs++; + } +#ifdef HAVE_INET6 + else if (i->ifa_addr->sa_family == AF_INET6) + { + struct sockaddr_in6 *sin = (struct sockaddr_in6 *) i->ifa_addr; + jobject buffer = (*env)->NewDirectByteBuffer (env, &(sin->sin6_addr.s6_addr), 16); + (*env)->CallVoidMethod (env, e->netif, java_net_VMNetworkInterface_addAddress, + buffer); + if ((*env)->ExceptionCheck (env)) + { + free_netif_list (env, iflist); + freeifaddrs (ifaddrs); + return NULL; + } + (*env)->DeleteLocalRef (env, buffer); + e->numaddrs++; + } +#endif /* HAVE_INET6 */ + } + + /* Count how many interfaces we have that have addresses. */ + for (e = iflist; e != NULL; e = e->next) + { + if (e->numaddrs != 0) + numifs++; + } + + netifs = (*env)->NewObjectArray (env, numifs, clazz, NULL); + k = 0; + for (e = iflist; e != NULL && k < numifs; e = e->next) + { + if (e->numaddrs != 0) + { + (*env)->SetObjectArrayElement (env, netifs, k, e->netif); + (*env)->DeleteLocalRef (env, e->netif); + k++; + } + } + + free_netif_list (env, iflist); + freeifaddrs (ifaddrs); + return netifs; +#else + JCL_ThrowException (env, "java/net/SocketException", "getifaddrs not supported"); + return NULL; +#endif /* HAVE_GETIFADDRS */ } /* end of file */ |