What kind of debug output statement is valid in getaddrinfo.c?

by 鎹疯秴 鐜 » Fri, 20 May 2011 17:17:53 GMT


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 Hi, developers:

I am currently developing an IPv6 DNS resolver on Android-x86 platform
in socket programming in C so I would like to modify some code in /
home/ubuntu/android-x86/bionic/libc/netbsd/net/getaddrinfo.c". I want
to do debugging in this file so I am trying to adding debug output
statements in this file.

I 've tried "LOGE", "printf" and "fprintf" but none of them works.
Is there anyone knows what kind of debug output statement is valid in
this file? Thank you very much!!

Best wishes,

Jiechao Wang
BUPT

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2. Porting Wifi driver on Android

Hi everyone,
    I'm porting wifi driver (Ralink chip) on Android 2.0.1 board.
first of all I made some modifies

(1)   modify build/target/board/generic/BoardConfig.mk

add HAVE_CUSTOM_WIFI_DRIVER_2 := true



(2)   Android using wpa_supplicant to management wifi. Make sure
external/wpa_supplicant/.config is looking like this

# CONFIG_NO_WPA=y

CONFIG_OS=unix

CONFIG_IEEE8021X_EAPOL=y

CONFIG_EAP_MD5=y

CONFIG_EAP_MSCHAPV2=y

CONFIG_EAP_TLS=y

CONFIG_EAP_PEAP=y

CONFIG_EAP_TTLS=y

CONFIG_EAP_GTC=y

CONFIG_EAP_OTP=y

CONFIG_EAP_SIM=y

CONFIG_EAP_AKA=y

CONFIG_EAP_PSK=y

CONFIG_EAP_SAKE=y

CONFIG_EAP_GPSK=y

CONFIG_EAP_PAX=y

CONFIG_EAP_LEAP=y

# CONFIG_EAP_FAST=y

CONFIG_PKCS12=y

# CONFIG_PCSC=y

CONFIG_SMARTCARD=y

CONFIG_WIRELESS_EXTENSION=y

CONFIG_CTRL_IFACE=y

# CONFIG_DRIVER_HOSTAP=y

# CONFIG_DRIVER_HERMES=y

# CONFIG_DRIVER_MADWIFI=y

# CONFIG_DRIVER_ATMEL=y

CONFIG_DRIVER_WEXT=y

# CONFIG_DRIVER_NDISWRAPPER=y

# CONFIG_DRIVER_BROADCOM=y

# CONFIG_DRIVER_IPW=y

# CONFIG_DRIVER_BSD=y

# CONFIG_DRIVER_NDIS=y

# CONFIG_DRIVER_TEST=y

# CONFIG_DRIVER_CUSTOM=y

# CONFIG_DEBUG_FILE=y

# CONFIG_INTERNAL_LIBTOMMATH=y



(3)   Enable wpa_supplicant compile option, modify external/
wpa_supplicant/Android.mk

(3.1)

LOCAL_PATH := $(call my-dir)



WPA_BUILD_SUPPLICANT := true

ifneq ($(TARGET_SIMULATOR),true)

  ifneq ($(BOARD_WPA_SUPPLICANT_DRIVER),)

    WPA_BUILD_SUPPLICANT := true

    CONFIG_DRIVER_$(BOARD_WPA_SUPPLICANT_DRIVER) = y

  endif



(3.2) remove mark symbol, and look like this

########################


local_target_dir := $(TARGET_OUT)/etc/wifi



include $(CLEAR_VARS)

LOCAL_MODULE := wpa_supplicant.conf

LOCAL_MODULE_TAGS := user

LOCAL_MODULE_CLASS := ETC

LOCAL_MODULE_PATH := $(local_target_dir)

LOCAL_SRC_FILES := $(LOCAL_MODULE)

include $(BUILD_PREBUILT)

#

########################



(4)   Modify wpa_supplicant setting file, and out/target/product/
generic/system/etc/wifi/ will be created after #make in step (3) out/
target/product/generic/system/etc/wifi/wpa_supplicant.conf



(4.1)

# The value can be set to, e.g., udp (ctrl_interface=udp)

#

# For Windows Named Pipe: This value can be used to set the security
descriptor

# for controlling access to the control interface. Security descriptor
can be

# set using Security Descriptor String Format (see http://msdn.microsoft.com/

# library/default.asp?url=/library/en-us/secauthz/security/

# security_descriptor_string_format.asp). The descriptor string needs
to be

# prefixed with SDDL=. For example, ctrl_interface=SDDL=D: would set
an empty

# DACL (which will reject all connections). See README-Windows.txt for
more

# information about SDDL string format.

#

#ctrl_interface=wlan0

ctrl_interface=DIR=/data/system/wpa_supplicant/ GROUP=system



(4.2) setting default AccessPoint value:



# Only WPA-PSK is used. Any valid cipher combination is accepted.

network={

       ssid="example"         // AP name

       proto=WPA            //encypted method

       key_mgmt=WPA-PSK   //using psk

       pairwise=CCMP TKIP

       group=CCMP TKIP WEP104 WEP40

 
psk=06b4be19da289f475aa46a33cb793029d4ab3db7a23ee92382eb0106c72ac7bb

       priority=2

}



(5)   Add directory which is needed when enable wifi under linux,

System/core/rootdir/init.rc





    # give system access to wpa_supplicant.conf for backup and restore

    mkdir /data/misc/wifi 0770 wifi wifi

    chmod 0770 /data/misc/wifi

    chmod 0660 /data/misc/wifi/wpa_supplicant.conf

    mkdir /data/misc/wifi/sockets 0770 wifi wifi

    mkdir /data/misc/android 0770 wifi wifi

    mkdir /data/system/wpa_supplicant 0770 wifi wifi

    mkdir /data/misc/dhcp 0770 dhcp dhcp

    chown dhcp dhcp /data/misc/dhcp

    chmod 0555 /system/bin/busybox



(6)   Modify HAL code, hardware/libhardware_legacy/wifi/wifi.c

Re-define the include path



#ifndef WIFI_DRIVER_MODULE_PATH

//#define WIFI_DRIVER_MODULE_PATH        "/system/lib/modules/wlan.ko"

#define WIFI_DRIVER_MODULE_PATH      "/lib/modules/rt3070sta.ko"

#endif

#ifndef WIFI_DRIVER_MODULE_NAME

//#define WIFI_DRIVER_MODULE_NAME         "wlan"

#define WIFI_DRIVER_MODULE_NAME         "ra0"

#endif

#ifndef WIFI_DRIVER_MODULE_ARG

#define WIFI_DRIVER_MODULE_ARG          ""

#endif

#ifndef WIFI_FIRMWARE_LOADER

#define WIFI_FIRMWARE_LOADER            ""

#endif

#define WIFI_TEST_INTERFACE             "sta"

(7)   Make and place driver relative file after boot.
place rt3070sta.ko at /lib/modules/
place RT2870STA.dat at  /etc/Wireless/RT2870STA/  (it is driver
needed)
place libiw.so.29 at /lib  (it is driver needed)

(8) select "Settings" -> "Wireless&networks" -> "Wi-Fi" in Android
I found the wifi module has been inserted. and I got the logcat.
====================
D/SettingsWifiEnabler( 1153): Received wifi state changed from
Disabled to Enabling
rtusb init --->
ra0 (usb): not using net_device_ops yet
usbcore: registered new interface driver rt2870

====================

but soon it fail and throws the log
====================
init: no such service 'wpa_supplicant'
====================

Does anyone have any suggestion or ideal????

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