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#include <jni.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <linux/if.h>
#include <android/log.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "jniglue.h"
jobjectArray Java_de_blinkt_openvpn_core_NativeUtils_getIfconfig(JNIEnv* env)
{
int sd;
if ((sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "Opening socket for intface get failed");
//jniThrowException(env, "java/lang/IllegalArgumentException", "Opening socket for intface get failed");
return NULL;
}
struct ifreq ifs[23];
struct ifconf ifc;
ifc.ifc_req = ifs;
ifc.ifc_len = sizeof (ifs);
if (ioctl (sd, SIOCGIFCONF, &ifc) < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "IOCTL for intface get failed");
//jniThrowException(env, "java/lang/IllegalArgumentException", "IOTCL socket for intface get failed");
close(sd);
return NULL;
}
char buf[NI_MAXHOST];
int ji=0;
/*
jtmp = (*env)->NewStringUTF(env, "HALLO WELT");
(*env)->SetObjectArrayElement(env, ret, ji++, jtmp);
*/
size_t num_intf=ifc.ifc_len / sizeof(struct ifreq);
jobjectArray ret= (jobjectArray) (*env)->NewObjectArray(env, num_intf*3,(*env)->FindClass(env, "java/lang/String"), NULL);
for (struct ifreq* ifr = ifc.ifc_req; ifr < ifs + num_intf; ifr++) {
if (ifr->ifr_addr.sa_family != AF_INET) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "NOT AF_INET: %s", ifr->ifr_name);
continue;
}
/* get interface addr, prefilled by SIOGIFCONF */
int err;
if ((err=getnameinfo(&ifr->ifr_addr, sizeof(struct sockaddr_in), buf, NI_MAXHOST, NULL, 0,
NI_NUMERICHOST)) !=0) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "getnameinfo failed for %s: %s", ifr->ifr_name, gai_strerror(err));
continue;
}
jstring jaddr = (*env)->NewStringUTF(env, buf);
jstring jname = (*env)->NewStringUTF(env, ifr->ifr_name);
struct ifreq ifreq;
strncpy (ifreq.ifr_name, ifr->ifr_name, sizeof (ifreq.ifr_name));
/* interface is up */
if (ioctl (sd, SIOCGIFFLAGS, &ifreq) < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "SIOCGIFFLAGS failed for %s: %s", ifr->ifr_name, strerror(errno));
continue;
}
if (!(ifreq.ifr_flags & IFF_UP)) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "IFF_UP failed for %s", ifr->ifr_name);
continue;
}
/* interface netmask */
if (ioctl (sd, SIOCGIFNETMASK, &ifreq) < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "SIOCIFNETMASK failed for %s: %s", ifr->ifr_name, strerror(errno));
continue;
}
if ((err=getnameinfo(&ifreq.ifr_netmask, sizeof(struct sockaddr_in), buf, NI_MAXHOST, NULL, 0,
NI_NUMERICHOST)) !=0) {
__android_log_print(ANDROID_LOG_DEBUG, "openvpn", "getnameinfo failed for %s: %s", ifr->ifr_name, gai_strerror(err));
continue;
}
jstring jnetmask = (*env)->NewStringUTF(env, buf);
(*env)->SetObjectArrayElement(env, ret, ji++, jname);
(*env)->SetObjectArrayElement(env, ret, ji++, jaddr);
(*env)->SetObjectArrayElement(env, ret, ji++, jnetmask);
}
if (sd >= 0)
close (sd);
return ret;
}
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