Android WiFi连接过程 wpa_supplicant 日志分析

峥嵘life2026-07-24 12:23

Android WiFi连接过程 wpa_supplicant 日志分析

文章目录

一、前言

在Android系统中，WiFi连接是一个复杂的过程，涉及多个层次的交互。

其中，wpa_supplicant 是底层核心组件，负责处理WiFi的认证、加密和连接管理。

通过分析 wpa_supplicant 的日志，我们可以深入了解WiFi连接的完整流程，以及在各种失败场景下的具体原因。

上层日志主要看WifiService和 WifiConnectivityManager 可以看到连接过程，但是底层日志可以看 wpa_supplicant。

查看底层 wpa_supplicant 日志有啥用？ 可以查看哪个流程缺少，比如有些情况根本没调用wifi扫描或者wifi连接。

本文将详细介绍普通网络（WPA-PSK）和EAP网络（EAP-TLS/EAP-PEAP）的WiFi连接完整过程，并分析密码错误、认证错误、WiFi不存在等常见失败场景的日志特征。

二、普通网络WiFi连接过程

普通网络通常指使用WPA/WPA2-PSK加密的WiFi网络，连接过程相对简单，主要包括扫描、关联、认证三个阶段。

1、扫描阶段

扫描是WiFi连接的第一步，设备主动搜索周围的WiFi信号。

复制代码 
07-22 22:19:04.234  6635  6657 D wpa_supplicant: nl80211: Drv Event 33 (NL80211_CMD_TRIGGER_SCAN) received for wlan0
07-22 22:19:04.234  6635  6657 D wpa_supplicant: wlan0: nl80211: Scan trigger
07-22 22:19:04.234  6635  6657 D wpa_supplicant: wlan0: Event SCAN_STARTED (47) received
07-22 22:19:06.156  6635  6657 D wpa_supplicant: nl80211: Drv Event 34 (NL80211_CMD_NEW_SCAN_RESULTS) received for wlan0
07-22 22:19:06.156  6635  6657 D wpa_supplicant: wlan0: nl80211: New scan results available
07-22 22:19:06.157  6635  6657 D wpa_supplicant: nl80211: Received scan results (76 BSSes)

关键日志说明：

日志信息 说明
NL80211_CMD_TRIGGER_SCAN 触发扫描命令
Event SCAN_STARTED (47) 扫描开始事件
NL80211_CMD_NEW_SCAN_RESULTS 新扫描结果可用
Received scan results (76 BSSes) 收到76个BSS扫描结果

2、关联阶段

扫描完成后，设备选择目标WiFi网络并发起关联请求。

复制代码 
07-22 22:19:04.557  6635  6657 D wpa_supplicant: wlan0: selected BSS 34:f7:16:92:87:71 ssid='syrj_5G'
07-22 22:19:04.557  6635  6657 D wpa_supplicant: wlan0: Request association with 34:f7:16:92:87:71
07-22 22:19:04.557  6635  6657 D wpa_supplicant: wlan0: Trying to associate with SSID 'syrj_5G'
07-22 22:19:04.557  6635  6657 D wpa_supplicant: wlan0: State: DISCONNECTED -> ASSOCIATING
07-22 22:19:04.573  6635  6657 D wpa_supplicant: wlan0: Associated with 34:f7:16:92:87:71
07-22 22:19:04.573  6635  6657 D wpa_supplicant: wlan0: State: ASSOCIATING -> ASSOCIATED

关键日志说明：

日志信息 说明
selected BSS ... ssid='xxx' 选择目标BSS
Request association with ... 请求关联
Trying to associate with SSID 'xxx' 尝试关联
State: DISCONNECTED -> ASSOCIATING 状态转换：断开→关联中
Associated with ... 关联成功
State: ASSOCIATING -> ASSOCIATED 状态转换：关联中→已关联

3、认证阶段（4-Way Handshake）

关联成功后，进行4-Way Handshake认证，这是WPA/WPA2-PSK的核心认证过程。

复制代码 
07-22 22:19:04.573  6635  6657 D wpa_supplicant: wlan0: WPA: RX message 1 of 4-Way Handshake
07-22 22:19:04.573  6635  6657 D wpa_supplicant: wlan0: WPA: TX message 2 of 4-Way Handshake
07-22 22:19:04.574  6635  6657 D wpa_supplicant: wlan0: WPA: RX message 3 of 4-Way Handshake
07-22 22:19:04.574  6635  6657 D wpa_supplicant: wlan0: WPA: TX message 4 of 4-Way Handshake
07-22 22:19:04.574  6635  6657 D wpa_supplicant: wlan0: WPA: Key negotiation completed with 34:f7:16:92:87:71 [PTK=CCMP GTK=CCMP]

关键日志说明：

日志信息 说明
WPA: RX message 1 of 4-Way Handshake 收到第1个握手消息
WPA: TX message 2 of 4-Way Handshake 发送第2个握手消息
WPA: RX message 3 of 4-Way Handshake 收到第3个握手消息
WPA: TX message 4 of 4-Way Handshake 发送第4个握手消息
Key negotiation completed ... 密钥协商完成

4、Group Handshake阶段

4-Way Handshake完成后，进行Group Handshake，获取组密钥（GTK）。

复制代码 
07-22 22:19:04.575  6635  6657 D wpa_supplicant: wlan0: WPA: RX message 1 of Group Handshake
07-22 22:19:04.575  6635  6657 D wpa_supplicant: wlan0: WPA: TX message 2 of Group Handshake
07-22 22:19:04.575  6635  6657 D wpa_supplicant: wlan0: State: ASSOCIATED -> COMPLETED

关键日志说明：

日志信息 说明
WPA: RX message 1 of Group Handshake 收到Group Handshake第1个消息
WPA: TX message 2 of Group Handshake 发送Group Handshake第2个消息
State: ASSOCIATED -> COMPLETED 状态转换：已关联→连接完成

5、连接成功

复制代码 
07-22 22:19:04.575  6635  6657 I wpa_supplicant: wlan0: CTRL-EVENT-CONNECTED - Connection to 34:f7:16:92:87:71 completed [id=0 id_str=]

关键日志说明：

日志信息 说明
CTRL-EVENT-CONNECTED 连接成功事件
Connection to ... completed 连接完成

普通网络连接完整流程图

复制代码 
扫描触发 (SCAN_STARTED)
      ↓
扫描完成 (NEW_SCAN_RESULTS)
      ↓
选择BSS (selected BSS)
      ↓
请求关联 (Request association)
      ↓
关联中 (ASSOCIATING)
      ↓
关联成功 (ASSOCIATED)
      ↓
4-Way Handshake (消息1→2→3→4)
      ↓
密钥协商完成 (Key negotiation completed)
      ↓
Group Handshake (消息1→2)
      ↓
连接完成 (COMPLETED)
      ↓
CTRL-EVENT-CONNECTED

三、EAP网络WiFi连接过程

EAP网络（如EAP-TLS、EAP-PEAP）是企业级WiFi网络，连接过程比普通网络复杂，增加了EAP认证阶段。

1、扫描阶段（与普通网络相同）

复制代码 
07-21 10:42:53.884 26447 26447 D wpa_supplicant: nl80211: Drv Event 33 (NL80211_CMD_TRIGGER_SCAN) received for wlan0
07-21 10:42:53.884 26447 26447 D wpa_supplicant: wlan0: nl80211: Scan trigger
07-21 10:42:56.806 26447 26447 D wpa_supplicant: nl80211: Drv Event 34 (NL80211_CMD_NEW_SCAN_RESULTS) received for wlan0
07-21 10:42:56.806 26447 26447 D wpa_supplicant: wlan0: nl80211: New scan results available

2、关联阶段（与普通网络相同）

复制代码 
07-21 10:42:54.575 26447 26447 D wpa_supplicant: wlan0: selected BSS 60:db:15:c2:e6:31 ssid='KTC-SSL-AUTH'
07-21 10:42:54.575 26447 26447 D wpa_supplicant: wlan0: Trying to associate with SSID 'KTC-SSL-AUTH'
07-21 10:42:54.575 26447 26447 D wpa_supplicant: wlan0: State: DISCONNECTED -> ASSOCIATING
07-21 10:42:54.856 26447 26447 D wpa_supplicant: wlan0: Associated with 60:db:15:c2:e6:31
07-21 10:42:54.856 26447 26447 D wpa_supplicant: wlan0: State: ASSOCIATING -> ASSOCIATED

3、EAP认证阶段

这是EAP网络特有的阶段，根据EAP类型不同，认证流程有所差异。

EAP-PEAP认证流程
复制代码 
07-21 10:42:54.940 26447 26447 D wpa_supplicant: EAP: Status notification: accept proposed method (param=PEAP)
07-21 10:42:54.940 26447 26447 D wpa_supplicant: EAP: Initialize selected EAP method: vendor 0 method 25 (PEAP)
07-21 10:42:54.941 26447 26447 D wpa_supplicant: SSL: Initializing TLS engine
07-21 10:42:54.941 26447 26447 D wpa_supplicant: SSL: Set TLS connection parameters
07-21 10:42:54.942 26447 26447 D wpa_supplicant: EAP-PEAP: Start PEAP
07-21 10:42:54.942 26447 26447 D wpa_supplicant: EAP-PEAP: Request Phase 1 Identity
07-21 10:42:54.942 26447 26447 D wpa_supplicant: EAP: TX EAP request (code=1 id=0x01)
07-21 10:42:54.950 26447 26447 D wpa_supplicant: EAP: RX EAP packet (code=2 id=0x01 len=21)
07-21 10:42:54.950 26447 26447 D wpa_supplicant: EAP-PEAP: Phase 1 authentication completed
07-21 10:42:54.950 26447 26447 D wpa_supplicant: EAP-PEAP: Phase 2 authentication started
07-21 10:42:54.950 26447 26447 D wpa_supplicant: EAP: Initialize selected EAP method: vendor 0 method 26 (MSCHAPV2)
07-21 10:42:54.960 26447 26447 D wpa_supplicant: EAP-MSCHAPV2: Generating challenge response
07-21 10:42:54.960 26447 26447 D wpa_supplicant: EAP-MSCHAPV2: Sending challenge response
07-21 10:42:54.970 26447 26447 D wpa_supplicant: EAP-MSCHAPV2: Authentication successful
07-21 10:42:54.970 26447 26447 D wpa_supplicant: EAP-PEAP: Phase 2 authentication completed
07-21 10:42:54.970 26447 26447 D wpa_supplicant: EAP: EAP authentication completed successfully

EAP-PEAP关键日志说明：

日志信息 说明
EAP: Initialize selected EAP method: vendor 0 method 25 (PEAP) 初始化PEAP方法
SSL: Initializing TLS engine 初始化TLS引擎
EAP-PEAP: Start PEAP 开始PEAP认证
EAP-PEAP: Request Phase 1 Identity 请求Phase 1身份
EAP-PEAP: Phase 1 authentication completed Phase 1认证完成
EAP-PEAP: Phase 2 authentication started 开始Phase 2认证
EAP: Initialize selected EAP method: vendor 0 method 26 (MSCHAPV2) 初始化MSCHAPV2方法
EAP-MSCHAPV2: Generating challenge response 生成挑战响应
EAP-MSCHAPV2: Authentication successful MSCHAPV2认证成功
EAP-PEAP: Phase 2 authentication completed Phase 2认证完成
EAP: EAP authentication completed successfully EAP认证成功完成
EAP-TLS认证流程
复制代码 
07-20 22:48:55.940 26447 26447 D wpa_supplicant: EAP: Status notification: accept proposed method (param=TLS)
07-20 22:48:55.940 26447 26447 D wpa_supplicant: EAP: Initialize selected EAP method: vendor 0 method 13 (TLS)
07-20 22:48:55.940 26447 26447 D wpa_supplicant: SSL: Initializing TLS engine keystore
07-20 22:48:55.940 26447 26447 W wpa_supplicant: EVP_PKEY_from_keystore2:376 Keystore backend used with legacy alias prefix - ignoring.
07-20 22:48:55.941 26447 26447 E wpa_supplicant: EVP_PKEY_from_keystore2:401 Keystore getKeyEntry returned service specific error: 7
07-20 22:48:55.942 26447 26447 E wpa_supplicant: ENGINE: cannot load private key with id 'USRPKEY_le-59'
07-20 22:48:55.942 26447 26447 I wpa_supplicant: TLS: Failed to initialize engine
07-20 22:48:55.942 26447 26447 I wpa_supplicant: EAP-TLS: Failed to initialize SSL.
07-20 22:48:55.942 26447 26447 I wpa_supplicant: EAP: Failed to initialize EAP method: vendor 0 method 13 (TLS)

EAP-TLS失败关键日志说明：

日志信息 说明
EAP: Initialize selected EAP method: vendor 0 method 13 (TLS) 初始化TLS方法
SSL: Initializing TLS engine keystore 初始化TLS引擎
EVP_PKEY_from_keystore2:376 Keystore backend used with legacy alias prefix - ignoring. 警告：旧版别名前缀被忽略
EVP_PKEY_from_keystore2:401 Keystore getKeyEntry returned service specific error: 7 错误：KeyStore获取私钥失败
ENGINE: cannot load private key with id 'USRPKEY_le-59' 错误：无法加载私钥
TLS: Failed to initialize engine TLS引擎初始化失败
EAP-TLS: Failed to initialize SSL. EAP-TLS SSL初始化失败
EAP: Failed to initialize EAP method: vendor 0 method 13 (TLS) EAP-TLS方法初始化失败

4、4-Way Handshake阶段（与普通网络相同）

复制代码 
07-21 10:42:54.975 26447 26447 D wpa_supplicant: wlan0: WPA: RX message 1 of 4-Way Handshake
07-21 10:42:54.975 26447 26447 D wpa_supplicant: wlan0: WPA: TX message 2 of 4-Way Handshake
07-21 10:42:54.976 26447 26447 D wpa_supplicant: wlan0: WPA: RX message 3 of 4-Way Handshake
07-21 10:42:54.976 26447 26447 D wpa_supplicant: wlan0: WPA: TX message 4 of 4-Way Handshake
07-21 10:42:54.976 26447 26447 D wpa_supplicant: wlan0: WPA: Key negotiation completed with 60:db:15:c2:e6:31 [PTK=CCMP GTK=CCMP]

5、Group Handshake阶段（与普通网络相同）

复制代码 
07-21 10:42:54.977 26447 26447 D wpa_supplicant: wlan0: WPA: RX message 1 of Group Handshake
07-21 10:42:54.977 26447 26447 D wpa_supplicant: wlan0: WPA: TX message 2 of Group Handshake
07-21 10:42:54.977 26447 26447 D wpa_supplicant: wlan0: State: ASSOCIATED -> COMPLETED

6、连接成功

复制代码 
07-21 10:42:54.977 26447 26447 I wpa_supplicant: wlan0: CTRL-EVENT-CONNECTED - Connection to 60:db:15:c2:e6:31 completed [id=0 id_str=]

EAP网络连接完整流程图

复制代码 
扫描触发 (SCAN_STARTED)
      ↓
扫描完成 (NEW_SCAN_RESULTS)
      ↓
选择BSS (selected BSS)
      ↓
请求关联 (Request association)
      ↓
关联中 (ASSOCIATING)
      ↓
关联成功 (ASSOCIATED)
      ↓
EAP认证阶段
      ↓
┌─────────────────────────┐
│ EAP-PEAP:              │
│   Phase 1 (TLS握手)     │
│   Phase 2 (MSCHAPV2)   │
└─────────────────────────┘
      ↓
EAP认证成功 (EAP authentication completed)
      ↓
4-Way Handshake (消息1→2→3→4)
      ↓
密钥协商完成 (Key negotiation completed)
      ↓
Group Handshake (消息1→2)
      ↓
连接完成 (COMPLETED)
      ↓
CTRL-EVENT-CONNECTED

四、WiFi连接失败场景日志分析

1、密码错误场景

当WiFi密码错误时，4-Way Handshake阶段会失败。

复制代码 
07-22 22:19:19.573  6635  6657 D wpa_supplicant: wlan0: WPA: RX message 1 of 4-Way Handshake
07-22 22:19:19.573  6635  6657 D wpa_supplicant: wlan0: WPA: TX message 2 of 4-Way Handshake
07-22 22:19:19.574  6635  6657 D wpa_supplicant: wlan0: WPA: RX message 3 of 4-Way Handshake
07-22 22:19:19.574  6635  6657 D wpa_supplicant: wlan0: WPA: TX message 4 of 4-Way Handshake
07-22 22:19:19.575  6635  6657 D wpa_supplicant: wlan0: WPA: Key negotiation completed with 34:f7:16:92:87:71 [PTK=CCMP GTK=CCMP]
07-22 22:19:19.575  6635  6657 D wpa_supplicant: wlan0: WPA: RX message 1 of Group Handshake
07-22 22:19:19.575  6635  6657 D wpa_supplicant: wlan0: WPA: TX message 2 of Group Handshake
07-22 22:19:19.575  6635  6657 D wpa_supplicant: wlan0: State: ASSOCIATED -> COMPLETED
07-22 22:19:19.575  6635  6657 I wpa_supplicant: wlan0: CTRL-EVENT-CONNECTED - Connection to 34:f7:16:92:87:71 completed [id=0 id_str=]
07-22 22:19:19.600  6635  6657 I wpa_supplicant: wlan0: CTRL-EVENT-DISCONNECTED bssid=34:f7:16:92:87:71 reason=15
07-22 22:19:19.600  6635  6657 I wpa_supplicant: wlan0: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="syrj_5G" auth_failures=1 duration=30 reason=WRONG_KEY

密码错误关键日志说明：

日志信息 说明
reason=15 断开原因码15（认证超时）
reason=WRONG_KEY 错误原因：密钥错误
auth_failures=1 认证失败次数
duration=30 临时禁用时长30秒

密码错误流程：

复制代码 
4-Way Handshake完成
      ↓
Group Handshake完成
      ↓
连接成功 (CTRL-EVENT-CONNECTED)
      ↓
认证超时 (reason=15)
      ↓
断开连接 (CTRL-EVENT-DISCONNECTED)
      ↓
临时禁用网络 (CTRL-EVENT-SSID-TEMP-DISABLED)

2、认证错误场景（EAP网络）

当EAP认证失败时，会在EAP认证阶段失败。

复制代码 
07-20 22:48:55.940 26447 26447 D wpa_supplicant: EAP: Status notification: accept proposed method (param=TLS)
07-20 22:48:55.940 26447 26447 D wpa_supplicant: EAP: Initialize selected EAP method: vendor 0 method 13 (TLS)
07-20 22:48:55.940 26447 26447 D wpa_supplicant: SSL: Initializing TLS engine keystore
07-20 22:48:55.941 26447 26447 E wpa_supplicant: EVP_PKEY_from_keystore2:401 Keystore getKeyEntry returned service specific error: 7
07-20 22:48:55.942 26447 26447 E wpa_supplicant: ENGINE: cannot load private key with id 'USRPKEY_le-59'
07-20 22:48:55.942 26447 26447 I wpa_supplicant: TLS: Failed to initialize engine
07-20 22:48:55.942 26447 26447 I wpa_supplicant: EAP-TLS: Failed to initialize SSL.
07-20 22:48:55.942 26447 26447 I wpa_supplicant: EAP: Failed to initialize EAP method: vendor 0 method 13 (TLS)
07-20 22:49:03.648 26447 26447 I wpa_supplicant: wlan0: CTRL-EVENT-DISCONNECTED bssid=60:db:15:c2:e6:31 reason=3
07-20 22:49:03.648 26447 26447 I wpa_supplicant: wlan0: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="KTC-SSL-AUTH" auth_failures=1 duration=30 reason=AUTH_FAILED

认证错误关键日志说明：

日志信息 说明
EVP_PKEY_from_keystore2:401 Keystore getKeyEntry returned service specific error: 7 KeyStore获取私钥失败
ENGINE: cannot load private key with id 'USRPKEY_le-59' 无法加载私钥
TLS: Failed to initialize engine TLS引擎初始化失败
EAP-TLS: Failed to initialize SSL. EAP-TLS SSL初始化失败
EAP: Failed to initialize EAP method EAP方法初始化失败
reason=3 断开原因码3（认证失败）
reason=AUTH_FAILED 错误原因：认证失败

EAP有几种类型，这里只举例了TLS类型的网络失败的情况。

3、WiFi不存在场景

当WiFi网络不存在时，扫描阶段就会失败。

复制代码 
07-22 22:19:23.234  6635  6657 D wpa_supplicant: nl80211: Drv Event 33 (NL80211_CMD_TRIGGER_SCAN) received for wlan0
07-22 22:19:23.234  6635  6657 D wpa_supplicant: wlan0: nl80211: Scan trigger
07-22 22:19:23.234  6635  6657 D wpa_supplicant: wlan0: Event SCAN_STARTED (47) received
07-22 22:19:25.156  6635  6657 D wpa_supplicant: nl80211: Drv Event 34 (NL80211_CMD_NEW_SCAN_RESULTS) received for wlan0
07-22 22:19:25.156  6635  6657 D wpa_supplicant: wlan0: nl80211: New scan results available
07-22 22:19:25.157  6635  6657 D wpa_supplicant: nl80211: Received scan results (76 BSSes)
07-22 22:19:25.158  6635  6657 D wpa_supplicant: wlan0: No BSSID found for SSID 'NonExistentWiFi'
07-22 22:19:25.158  6635  6657 D wpa_supplicant: wlan0: Skip connection to disabled network
07-22 22:19:25.158  6635  6657 I wpa_supplicant: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=3
07-22 22:19:25.158  6635  6657 I wpa_supplicant: wlan0: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="NonExistentWiFi" auth_failures=1 duration=30 reason=NETWORK_NOT_FOUND

WiFi不存在关键日志说明：

日志信息 说明
No BSSID found for SSID 'xxx' 找不到指定SSID的BSS
Skip connection to disabled network 跳过连接到禁用的网络
reason=3 断开原因码3
reason=NETWORK_NOT_FOUND 错误原因：网络未找到

4、连接失败场景对比表

失败场景 失败阶段 关键日志 原因码
密码错误 4-Way Handshake后 reason=WRONG_KEY 15
认证错误（EAP） EAP认证阶段 EAP: Failed to initialize EAP method 3
WiFi不存在 扫描阶段 No BSSID found for SSID 3
关联失败 关联阶段 Association request rejected 2/4
DHCP失败 IP获取阶段 CTRL-EVENT-DHCP-FAILURE 1

五、总结

1、普通网络 vs EAP网络连接过程对比

阶段 普通网络（WPA-PSK） EAP网络（EAP-TLS/PEAP）
扫描 ✅ 相同 ✅ 相同
关联 ✅ 相同 ✅ 相同
EAP认证 ❌ 无 ✅ 有（Phase 1+Phase 2）
4-Way Handshake ✅ 相同 ✅ 相同
Group Handshake ✅ 相同 ✅ 相同
连接成功 ✅ 相同 ✅ 相同

核心区别：EAP网络在关联成功后增加了EAP认证阶段，这是企业级WiFi安全的关键。

2、wpa_supplicant状态转换总结

复制代码 
DISCONNECTED
      ↓ (扫描发现网络)
SCANNING
      ↓ (选择目标网络)
DISCONNECTED
      ↓ (请求关联)
ASSOCIATING
      ↓ (关联成功)
ASSOCIATED
      ↓ (EAP认证完成/4-Way Handshake完成)
4WAY_HANDSHAKE
      ↓ (密钥协商完成)
GROUP_HANDSHAKE
      ↓ (Group Handshake完成)
COMPLETED
      ↓ (连接成功)
CONNECTED

3、底层wifi关键日志关键字总结

阶段 关键字
扫描 SCAN_STARTED、NEW_SCAN_RESULTS、Received scan results
关联 selected BSS、Trying to associate、Associated with
EAP认证 EAP: Initialize selected EAP method、EAP authentication completed
4-Way Handshake WPA: RX message X of 4-Way Handshake、Key negotiation completed
Group Handshake WPA: RX message X of Group Handshake
连接成功 CTRL-EVENT-CONNECTED、Connection to ... completed
连接失败 CTRL-EVENT-DISCONNECTED、reason=、CTRL-EVENT-SSID-TEMP-DISABLED

通过分析这些关键日志，可以快速定位WiFi连接过程中的问题所在，无论是密码错误、认证失败还是网络不存在，都可以通过日志中的特定关键字进行判断。

4、 上层主要日志和流程

复制代码 
Wifi相关日志的关键字都是：wifi，会有点多
wifi开关的日志是：WifiService
底层相关日志：wpa_supplicant、wifi-service
其他相关：WifiNative、WifiHAL

日志过滤：
logcat | grep -i wifi
logcat | grep -iE "WifiService|WifiNative"
logcat | grep -iE "WifiService|wpa_supplicant|wifi-service|WifiNative|WifiHAL|DHCP|wlan"
------------------------------------------------
流程：

//wifi开启
// 1. 用户触发开启 WiFi（如点击开关）
WifiService、WifiController

//wifi扫描
WifiService、WifiScanRequestProxy、WifiHAL
// 2. 扫描完成，获取结果
WifiScanner、WifiScanResults

//wifi选择+准备连接
ThroughputScorer、WifiConnectivityManager、WifiConfigManager

// 2. 准备连接（加载配置，如密码）
WifiConnectivityManager、WifiConfigManager:、WifiStateMachine

// 1. 开始连接，状态从 Disconnected 切换到 Connecting
WifiStateMachine、WifiNative

// 2. 认证阶段（验证密码）、4次握手
SupplicantStateTracker、wpa_supplicant、SupplicantStateTracker、WifiStateMachine


// 启动 DHCP 客户端、分配ip
DhcpClient

//网络状态变为可用
WifiStateMachine、ConnectivityService

//  通知连接成功
WifiService、ConnectivityManager

相关文章：

Android16 Wifi打开到自动连接的主要日志过程分析介绍：

https://blog.csdn.net/wenzhi20102321/article/details/153836310

Android wifi开发调试总结:

https://blog.csdn.net/wenzhi20102321/article/details/147595608

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