移植wpa_supplicant到arm-linux

1.移植準備 
   a. 下載 openssl源代碼 (使用openssl-0.9.8e )
       官網： http://www.openssl.org/source/
       源碼：http://www.openssl.org/source/openssl-0.9.8e.tar.gz
  b. 下載 wpa_supplicant源代碼 (使用wpa_supplicant-0.7.3 )       
       官網：http://hostap.epitest.fi/wpa_supplicant/                                  
       源碼：http://hostap.epitest.fi/releases/wpa_supplicant-0.7.3.tar.gz
  c:  下載：libtommath源代碼(libtommath_0.39.orig.tar.gz)
       源碼：ftp://220.165.12.10/debian/pool/main/libt/libtommath/libtommath_0.39.orig.tar.gz

2. 編譯openssl
   a.將openssl解到 wpa_supplicant/patches 目錄下
       # tar zxvf openssl-0.9.8e.tar.gz  -C ../ wpa_supplicant-0.7.3/patches/
   b.將openssl-0.9.8-tls-extensions.patch拷貝到 wpa_supplicant/patches/openssl-0.9.8e 目錄下
       # cp wpa_supplicant-0.7.3/patches/openssl-0.9.8e-tls-extensions.patch openssl-0.9.8e/
   c.patch openssl-0.9.8e
       # patch -p1 < openssl-0.9.8e-tls-extensions.patch
   d. 編譯openssl
     方式1.
        # ./Configure linux-elf-arm -DB_ENDIAN linux:' arm-linux-gcc' shared --prefix=/usr/local/openssl
        #  make CC=arm-linux-gcc install
        >>產生 libssl.a 及libcrypto.a
     方式2.
        # ./Configure no-asm --prefix=/usr/local/openssl
        #  make CC=arm-linux-gcc install
      >>產生 libssl.so及libcrypto.so

3.編譯libtommath-0.39
   a.將libtommath-0.39解到/usr/src/ 目錄下
       # tar zxvf libtommath_0.39.orig.tar.gz  -C /usr/src
   b.編譯libtommath
      #  make CC=arm-linux-gcc
   產生libtommath.a

 #cp defconfig        .config
CONFIG_DRIVER_WEXT=y    
CONFIG_IEEE8021X_EAPOL=y    
CONFIG_EAP_FAST=y        
CONFIG_TLS=openssl        
CONFIG_TLS=internal        

CONFIG_INTERNAL_LIBTOMMATH=y
ifndef CONFIG_INTERNAL_LIBTOMMATH
LTM_PATH=/usr/src/libtommath-0.39
CFLAGS += -I$(LTM_PATH)
LIBS += -L$(LTM_PATH)
LIBS_p += -L$(LTM_PATH)
endif

CONFIG_WPS=y    
CONFIG_EAP_WPS=y        


        #vim .config               
                  CC= gcc -L/usr/local/ssl/lib/               
                  CFLAGS += -I/usr/local/ssl/include/               
                  LIBS += -L/usr/local/ssl/lib/       
        #make   CC=arm-linux-gcc install

WPA_SUPPLICANT當遇到WEP加密時，由於無法判斷是採用OPEN/SHARE,通常會在聲稱.conf檔中加入auth_alg=OPEN SHARED（至少Android遇到）,但事實上某些wifi網卡驅動不能實現同時OPEN和SHARED同時設置，任意時刻只能用一個，這裏給出解決不能同時設置的方法，在wpa_supplicant.c:wpa_supplicant_associate()中加入以下內容:


if (ssid->auth_alg) {
        algs = 0;
        if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
            algs |= AUTH_ALG_OPEN_SYSTEM;
        if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
            algs |= AUTH_ALG_SHARED_KEY;
        if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
            algs |= AUTH_ALG_LEAP;
        wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
               algs);

//新增這段

        if ((algs & AUTH_ALG_OPEN_SYSTEM) && (algs & AUTH_ALG_SHARED_KEY) ) {
            algs = AUTH_ALG_SHARED_KEY;
            G_TRY_CONNECT ++;

            if (G_TRY_CONNECT >= 4) {
                algs = AUTH_ALG_OPEN_SYSTEM;
                wpa_printf(MSG_DEBUG, "RAYDEBUG--------------------change to ALG_OPEN_SYSTEM");
            }
        }
    }

#Arm-linux/linux //建立socket
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=wheelupdate_config=1 (可以在wpa_cli中保存配置檔)
#ap_scan=1

#Android  //建立socket
ctrl_interface=DIR=/data/misc/wifi
ctrl_interface_group=wifi
update_config=1 (可以在wpa_cli中保存配置檔)
#ap_scan=1

##WPA/WPA2
# WPA-PSK, PSK use ASCII (只要密碼正確就允許)
#network={
# ssid="AcSiP"                           //AP名稱
#psk="1111111111"                  //密碼
#  #Higher priority use first
# priority=5
#}

# The same as above, assign SSID for AP without brocast SSID(針對那些拒絕廣播SSID的AP)
#network={
#network={
#  ssid="second ssid"
#  scan_ssid=1
#  psk="very secret passphrase"
#  priority=2
#}

# Allow WPA-PSK only. Allow any valid password set(允許使用任何合法的加密方式的組合)
#network={
#  ssid="example"
#  proto=WPA
#  key_mgmt=WPA-PSK
#  pairwise=CCMP TKIP
#  group=CCMP TKIP WEP104 WEP40
#  psk=06b4be19da289f475aa46a33cb793029d4ab3db7a23ee92382eb0106c72ac7bb
#  priority=2
#}

# Plaintext( Not use 802.1X )明文连接方式（不使用WPA和IEEE802.1X）
#network={
#  ssid="plaintext-test"
#  key_mgmt=NONE
#}


# Shared WEP, Not use IEEE 802.11 Shared Key（不使用WPA和IEEE802.1X）
network={
ssid=""Test1"
key_mgmt=NONE
# 引號包含的密鑰是ASCII密鑰
wep_key0="abcde"
# 沒有引號包含的密鑰是十六進位密鑰
wep_key1=0102030405
wep_key2="1234567890123"
wep_tx_keyidx=0
priority=5
}



#Shared WEP, Use IEEE 802.11 Shared Key
#network={
#  ssid="Test1"
#  key_mgmt=NONE
#  wep_key0="aaaaa"
#  wep_key1="aaaaa"
#  wep_key2="aaaaa"
#  wep_key3="aaaaa"
#  wep_tx_keyidx=0
#  priority=5
#  auth_alg=SHARED
#}

#IBSS/ad-hoc with WPA-None/TKIP
#network={
#  ssid="test adhoc"
#  mode=1
#  proto=WPA
#  key_mgmt=WPA-NONE
#  pairwise=NONE
#  group=TKIP
#  psk="secret passphrase"
#}

# wpa_cli -i <interface> status (看看目前的狀態)
# wpa_cli -i <interface> help (查看參數與指令)
# wpa_cli -i <interface> terminate (關閉wpa_supplicant)
# wpa_cli -i <interface> interface (查看有那些無線網卡介面)
# wpa_cli -i <interface> list_networks (查看wpa_supplicant.conf檔裡的設定)
# wpa_cli -i <interface> select_network (選擇不同的AP，id為AP代號0,1,2,3...)
# wpa_cli -i <interface> enable_network
# wpa_cli -i <interface> disable_network
# wpa_cli -i <interface> remove_network (刪除AP資訊)
# wpa_cli -i <interface> reconfigure (重新讀取wpa_supplicant.conf設定內容)
# wpa_cli -i <interface> save_config (儲存寫入到wpa_supplicant.conf中，否責變更無效)
# wpa_cli -i <interface> disconnect (斷線)
# wpa_cli -i <interface> reconnect (重新連線)
# wpa_cli -i <interface> scan (掃描附近的AP)
# wpa_cli -i <interface> scan_results (印出附近AP的相關資訊)

以上常常用到的差不多是disconnect, reconnect, scan, scan_results, select_network, list_networks, status, reconfigure

##Arm-linux/linux：建立socket    
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0update_config=1
#ap_scan=1
eapol_version=1
fast_reauth=1    

##Android：建立socket    
ctrl_interface=DIR=/data/misc/wifi
ctrl_interface_group=wifi
update_config=1
#ap_scan=1
eapol_version=1
fast_reauth=1