android wifi 初始化失败,android wpa_supplicant初始化流程及wifi打开慢原因分析

今天药忘吃喽~ 2022-10-17 11:22 457阅读 0赞

wpa\_supplicant是一个独立的进程，对应的文件为external/wpa\_supplicant\_8/wpa\_supplicant/main.c。

int main(int argc, char \*argv\[\])

global = wpa\_supplicant\_init(¶ms);

if (global == NULL) \{

wpa\_printf(MSG\_ERROR, "Failed to initialize wpa\_supplicant");

exitcode = -1;

goto out;

\} else \{

wpa\_printf(MSG\_INFO, "Successfully initialized "

"wpa\_supplicant");

for (i = 0; exitcode == 0 && i < iface\_count; i++) \{

struct wpa\_supplicant \*wpa\_s;

wpa\_s = wpa\_supplicant\_add\_iface(global, &ifaces\[i\]);

if (wpa\_s == NULL) \{

exitcode = -1;

break;

if (exitcode == 0)

exitcode = wpa\_supplicant\_run(global);

wpa\_supplicant\_deinit(global);

return exitcode;

总体流程为wpa\_supplicant\_init-->wpa\_supplicant\_add\_iface-->wpa\_supplicant\_init\_iface-->wpa\_supplicant\_driver\_init-->wapi\_supplicant\_init。

1 wpa\_supplicant\_init是用struct wpa\_params初始化struct wpa\_global，struct wpa\_params是调用wpa\_supplicant命令对应的参数列表。

struct wpa\_global \* wpa\_supplicant\_init(struct wpa\_params \*params) 对应的log有

04-28 11:14:13.444 D/wpa\_supplicant(19277): wpa\_supplicant v2.1-devel-4.4.4

04-28 11:14:13.444 D/wpa\_supplicant(19277): Global control interface '@android:wpa\_wlan0'

04-28 11:14:13.444 D/wpa\_supplicant(19277): Using Android control socket 'wpa\_wlan0'

04-28 11:14:13.444 I/wpa\_supplicant(19277): Successfully initialized wpa\_supplicant

2 wpa\_supplicant\_add\_iface用struct wpa\_global初始化struct wpa\_interface，增加wlan0和p2p0两个接口。

struct wpa\_supplicant \* wpa\_supplicant\_add\_iface(struct wpa\_global \*global, struct wpa\_interface \*iface)

04-28 11:14:13.444 D/wpa\_supplicant(19277): Override interface parameter: ctrl\_interface ('(null)' -> '/data/misc/wifi/sockets')

3 wpa\_supplicant\_init\_iface负责用struct wpa\_interface初始化wlan0、p2p0等代表的struct wpa\_supplicant。

static int wpa\_supplicant\_init\_iface(struct wpa\_supplicant \*wpa\_s, struct wpa\_interface \*iface)

wpa\_s->conf = wpa\_config\_read(wpa\_s->confname, NULL);

wpa\_config\_read(wpa\_s->confanother, wpa\_s->conf);

if (wpas\_init\_driver(wpa\_s, iface) < 0)//调用wpa\_supplicant\_set\_driver

return -1;

if (wpa\_supplicant\_driver\_init(wpa\_s) < 0)

return -1;

if (wpa\_supplicant\_init\_eapol(wpa\_s) < 0)

return -1;

\} 对应的log有

04-28 11:14:13.444 D/wpa\_supplicant(19277): Initializing interface 'p2p0' conf '/data/misc/wifi/p2p\_supplicant.conf'

driver 'nl80211' ctrl\_interface '/data/misc/wifi/sockets' bridge 'N/A'

04-28 11:14:13.444 D/wpa\_supplicant(19277): Configuration file '/data/misc/wifi/p2p\_supplicant.conf'

\-> '/data/misc/wifi/p2p\_supplicant.conf'

04-28 11:14:13.444 D/wpa\_supplicant(19277): Reading configuration file '/data/misc/wifi/p2p\_supplicant.conf'

04-28 11:14:13.444 D/wpa\_supplicant(19277): Reading configuration file '/system/etc/wifi/p2p\_supplicant\_overlay.conf'

04-28 11:14:13.804 D/wpa\_supplicant(19277): Initializing interface 'wlan0' conf '/data/misc/wifi/wpa\_supplicant.conf'

driver 'nl80211' ctrl\_interface '/data/misc/wifi/sockets' bridge 'N/A'

04-28 11:14:13.804 D/wpa\_supplicant(19277): Configuration file '/data/misc/wifi/wpa\_supplicant.conf'

\-> '/data/misc/wifi/wpa\_supplicant.conf'

04-28 11:14:14.234 D/wpa\_supplicant(19277): eap\_proxy: IMSI not available

4 wpa\_supplicant\_driver\_init中包含wapi\_supplicant\_init，利用函数进一步初始化struct wpa\_supplicant。

int wpa\_supplicant\_driver\_init(struct wpa\_supplicant \*wpa\_s)

wpa\_supplicant\_update\_mac\_addr(wpa\_s);

wapi\_supplicant\_init(wpa\_s);

wpa\_drv\_flush\_pmkid(wpa\_s);

wpa\_supplicant\_enabled\_networks(wpa\_s);

\} 对应的log有

04-28 11:14:13.534 D/wpa\_supplicant(19277): p2p0: Own MAC address: 3e:cb:7c:7d:20:06

04-28 11:14:13.674 D/wpa\_supplicant(19277): p2p0: RSN: flushing PMKID list in the driver

04-28 11:14:14.094 D/wpa\_supplicant(19277): wlan0: Own MAC address: 3c:cb:7c:7d:20:06

04-28 11:14:14.184 D/wpa\_supplicant(19277): wlan0: RSN: flushing PMKID list in the driver

5 wapi\_supplicant\_init，其中wapi又调用了自己的Initialization函数。

struct wpa\_supplicant \*wapi\_supplicant\_init(struct wpa\_supplicant \*wpa\_s)

for (;;) \{

wpa\_s->l2\_wapi = l2\_packet\_init(wpa\_s->ifname, wpa\_drv\_get\_mac\_addr(wpa\_s), WLAN\_WAPI\_IFACE,

wapi\_supplicant\_rx\_eapol, wpa\_s, 0);

l2\_packet\_get\_own\_addr(wpa\_s->l2\_wapi, wpa\_s->own\_addr);

TE\_WAPI\_ASUE\_Init();

\} 对应的log有

04-28 11:14:13.674 I/wpa\_supplicant(19277): wapi\_supplicant\_init: Init WAI packet p2p0

04-28 11:14:13.674 I/wpa\_supplicant(19277): Own MAC address: 3e:cb:7c:7d:20:06

04-28 11:14:13.674 D/wpa\_supplicant(19277): TE\_WAPI\_ASUE\_Init: WAPI: ASUE INIT

04-28 11:14:13.674 D/wpa\_supplicant(19277): Initialization: WAPI: Initializing WAPI Supplicant

04-28 11:14:13.674 E/wpa\_supplicant(19277): Initialization: WAPI:set Staues=1

android wifi 初始化失败,android wpa_supplicant初始化流程及wifi打开慢原因分析

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