Tag Archives: NDK

lookup name from IP , pretty useless for LAN, since not NBT query. just keep for record that do not spent more time

IT, ,

char* name = argv[1];
sa.sin_family = AF_INET;
sa.sin_addr.s_addr=inet_addr(name);
len = sizeof (struct sockaddr_in);

char hbuf[NI_MAXHOST];

if (int r=getnameinfo((sockaddr *)&sa, len, hbuf, sizeof(hbuf),NULL, 0, NI_NAMEREQD|NI_DGRAM)!=0)
printf("could not resolve hostname %d %s",r,gai_strerror(r));
else
printf("host=%s\n", hbuf);
//EAI_AGAIN

struct hostent *hp;
long addr;

addr = inet_addr(name);
if (hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET)) {
printf("Hostname:\t%s\n", hp->h_name);
printf("Aliases:\t");
while (hp->h_aliases[0])
printf("%s ", *hp->h_aliases++);
printf("\n");
printf("Addresses:\t");
while (hp->h_addr_list[0])
printf("%s ", inet_ntoa(*(struct in_addr *) * hp->h_addr_list++));
printf("\n");
exit(0);
}

Enable NDK debug on Eclipse , Ubuntu

IT, , ,

Summary

  • Push compiled binary to phone via adb push
    push gdb server to phone
    on phone: run gdb server with given TCP port

    on unbuntu: set TCP port forwarding
    on eclipse: set debug configuration to use TCP connection.

    • Details:

  • Push compiled binary to phone via adb push
    push gdb server to phone
    adb shell push $ANDROID_NDK_ROOT/prebuilt/android-arm/gdbserver/gdbserver /data
    Push compiled binary to phone via adb push

    adb push /home/victor/workspace/xxx/obj/local/armeabi/testPcap /data/app
    on phone: run gdb server with given TCP port
    adb shell
    On phone: /data/gdbserver :5039 /data/app/testPcap

    on unbuntu: set TCP port forwarding 在本地把本地TCP端口forward到设备的TCP端口

    adb forward tcp:5039 tcp:5039

    on eclipse: set debug configuration to use TCP connection.


    • Eclipse 设置调试
    程序为 /home/victor/workspace/xxx/obj/local/armeabi/testPcap
    DEBUGER： gdbserver

    gdb debuger： /home/victor/dev/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gdb
    gdb commandline: /home/victor/workspace/xxxx/libs/armeabi/droidsheep
    Connection localhost 5039