wpa_supplicant 移植后运行报错，无招了！

heshanxingzhe

wpa_supplicant移植后（环境为：s3c2416、kernel 2.6.36、busybox1.18.4、wifi为marvell sdio 88w8686）运行
wpa_supplicant -d -iwlan2 -c/etc/p2p.conf
报错：

…………
EAP: EAP entering state DISABLED
EAPOL: Supplicant port status: Unauthorized
EAPOL: Supplicant port status: Unauthorized
socket(PF_UNIX): Address family not supported by protocol
Failed to initialize control interface '/var/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.

Failed to add interface wlan2
wlan2: No keys have been configured - skip key clearing
wlan2: State: DISCONNECTED -> DISCONNECTED
…………

跟踪socket(PF_UNIX): Address family not supported by protocol发现到了函数wpa_supplicant_global_ctrl_iface_init就报错了，

1.         priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);
   
2.         if (priv->sock < 0) {
   
3.                 perror("socket(PF_UNIX)");
   
4.                 goto fail;
   
5.         }
   

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是socket函数error：Address family not supported by protocol

流程为：main()函数-->解析命令行参数（main.c）-->wpa_supplicant_init()（wpa_supplicant.c）-->wpa_supplicant_global_ctrl_iface_init()（ctrl_iface_unix.c）-->socket()

将priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);改为priv->sock = socket(PF_INET, SOCK_DGRAM, 0);
如：

1. /*        priv->sock = socket(PF_UNIX, SOCK_DGRAM, 0);*/
   
2.         priv->sock = socket(PF_INET, SOCK_DGRAM, 0);
   
3.         if (priv->sock < 0) {
   
4.                 perror("socket(PF_INET)");
   
5.                 wpa_printf(MSG_DEBUG,"--------priv->sock = %d ---------\n",priv->sock);
   
6.                 goto fail;
   
7.         }
   
8. 
   
9.         os_memset(&addr, 0, sizeof(addr));
   
10. #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
    
11.         addr.sun_len = sizeof(addr);
    
12. #endif /* __FreeBSD__ */
    
13. /*        addr.sun_family = AF_UNIX;*/
    
14.         addr.sun_family = PF_INET;
    
15.         fname = wpa_supplicant_ctrl_iface_path(wpa_s);
    
16.         if (fname == NULL)
    
17.                 goto fail;
    
18.         os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
    
19.         if ( bind(priv->sock, (struct sockaddr *) &addr, sizeof(struct sockaddr_un)) == -1 ) {
    
20.                 wpa_printf(MSG_DEBUG, "errno = %d and ctrl_iface bind(PF_UNIX) failed: %s",
    
21.                            errno,strerror(errno));
    

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改了后，socket函数OK，但下面bind又出错了：

EAPOL: Supplicant port status: Unauthorized
EAPOL: Supplicant port status: Unauthorized
Using existing control interface directory.
errno = 99 and ctrl_iface bind(PF_UNIX) failed: Cannot assign requested address
ctrl_iface exists and seems to be in use - cannot override it
Delete '/var/run/wpa_supplicant/wlan2' manually if it is not used anymore
Failed to initialize control interface '/var/run/wpa_supplicant'.
You may have another wpa_supplicant process already running or the file was
left by an unclean termination of wpa_supplicant in which case you will need
to manually remove this file before starting wpa_supplicant again.

Failed to add interface wlan2

目前不知道咋办了？哪位大虾有搞过这个的，指点下啊，感谢！

yydsr0278

这个问题，没搞过。
但个人觉得应该看看你的Kernel配置是否支持了PF_UNIX协议栈，如果没有，该为支持再试试看。

heshanxingzhe

很奇怪，将wpa_supplicant的配置文件中wpa_supplicant.conf中的：
ctrl_interface=/var/run/wpa_supplicant
注释掉，竟然没有上面所说的错误了（怀疑是程序没有执行到那个socket），但wpa_supplicant可以工作啊!
# wpa_supplicant -B -iwlan2 -c/etc/wpa_supplicant.conf
#  /sbin/udhcpc -i wlan2
竟然可以连上路由，得到IP，可以PING通啦！