wpa_cli工具的使用方法及分析
wpa_cli 的使用方法
在Android中有wpa_cli工具能够直接可wpa_supplicant通讯。能够查看一些wifi的信息。
使用方法：wpa_cli -i wlan0 -p /data/misc/wifi/sockets
wpa_cli源码分析
int main(int argc, char *argv[])
{
···
for (;;) {
c = getopt(argc, argv, "a:Bg:G:hi:p:P:s:v");
if (c < 0)
break;
switch (c) {
case 'a':
action_file = optarg;
break;
case 'B':
daemonize = 1;
break;
case 'g':
global = optarg;
break;
case 'G':
ping_interval = atoi(optarg);
break;
case 'h':
usage();
return 0;
case 'v':
printf("%s\n", wpa_cli_version);
return 0;
case 'i':
os_free(ctrl_ifname);
ctrl_ifname = os_strdup(optarg);
break;
case 'p':
ctrl_iface_dir = optarg;
break;
case 'P':
pid_file = optarg;
break;
case 's':
client_socket_dir = optarg;
break;
default:
usage();
return -1;
}
}
···
if (interactive) {
wpa_cli_interactive();
}
···
···
}
在main函数里面主要就是从命令行中读取参数。之后就是调用wpa_cli_interactive进行建立与supplicant通信的socket，通过读取stdin中的命令与用户进行交互。
static void wpa_cli_interactive(void)
{
printf("\nInteractive mode\n\n");
eloop_register_timeout(0, 0, try_connection, NULL, NULL);
eloop_run();
eloop_cancel_timeout(try_connection, NULL, NULL);
cli_txt_list_flush(&p2p_peers);
cli_txt_list_flush(&p2p_groups);
cli_txt_list_flush(&bsses);
cli_txt_list_flush(&ifnames);
cli_txt_list_flush(&networks);
if (edit_started)
edit_deinit(hfile, wpa_cli_edit_filter_history_cb);
os_free(hfile);
eloop_cancel_timeout(wpa_cli_ping, NULL, NULL);
wpa_cli_close_connection();
}
在这个函数里面就是注册try_connection。time到后就可以执行。这里面时间为0，也就是马上执行。
继续对try_connection函数进行分析
static void try_connection(void *eloop_ctx, void *timeout_ctx)
{
···
if (!wpa_cli_open_connection(ctrl_ifname, 1) == 0) {
···
}
···
···
done:
start_edit();
}
这里面就是打开socket用来与wpa_supplicant进行通讯，之后调用start_edit()函数
static void start_edit(void)
{
···
if (edit_init(wpa_cli_edit_cmd_cb, wpa_cli_edit_eof_cb,
wpa_cli_edit_completion_cb, NULL, hfile, ps) < 0) {
eloop_terminate();
return;
}
···
}
这里面注册了三个callback函数：
- wpa_cli_edit_cmd_cb。查找用户输入命令对应的函数，找到后执行，就是将用户指令发送个supplicant
- wpa_cli_edit_eof_cb，用户交互完毕之后调用。用来结束wpa_cli进程
- wpa_cli_edit_completion_cb，用户输入完毕调用函数。
下面主要分析wpa_cli_edit_cmd_cb函数。
static void wpa_cli_edit_cmd_cb(void *ctx, char *cmd)
{
char *argv[max_args];
int argc;
argc = tokenize_cmd(cmd, argv);
if (argc)
wpa_request(ctrl_conn, argc, argv);
}
这个函数就是获得用户输入的命令，之后调用wpa_request进行处理。
static int wpa_request(struct wpa_ctrl *ctrl, int argc, char *argv[])
{
···
cmd = wpa_cli_commands;
while (cmd->cmd) {
if (os_strncasecmp(cmd->cmd, argv[0], os_strlen(argv[0])) == 0)
{
match = cmd;
if (os_strcasecmp(cmd->cmd, argv[0]) == 0) {
/* we have an exact match */
count = 1;
break;
}
count++;
}
cmd++;
}
···
ret = match->handler(ctrl, argc - 1, &argv[1]);
}
这个函数里面主要就进行了上述的两个工作：
1.查找用户输入命令对应的函数
2.调用对应函数的handler
那么handler是如何定义的呢？
通过源码可以找到这些command都对应一个函数。这些函数都被封装到一个机构题里面。结构体内容如下：
static const struct wpa_cli_cmd wpa_cli_commands[] = {
{ "status", wpa_cli_cmd_status, NULL,
cli_cmd_flag_none,
"[verbose] = get current WPA/EAPOL/EAP status" },
{ "ifname", wpa_cli_cmd_ifname, NULL,
cli_cmd_flag_none,
"= get current interface name" },
{ "ping", wpa_cli_cmd_ping, NULL,
cli_cmd_flag_none,
"= pings wpa_supplicant" },
{ "relog", wpa_cli_cmd_relog, NULL,
cli_cmd_flag_none,
"= re-open log-file (allow rolling logs)" },
{ "note", wpa_cli_cmd_note, NULL,
cli_cmd_flag_none,
" = add a note to wpa_supplicant debug log" },
{ "mib", wpa_cli_cmd_mib, NULL,
cli_cmd_flag_none,
"= get MIB variables (dot1x, dot11)" },
{ "help", wpa_cli_cmd_help, wpa_cli_complete_help,
cli_cmd_flag_none,
"[command] = show usage help" },
{ "interface", wpa_cli_cmd_interface, NULL,
cli_cmd_flag_none,
"[ifname] = show interfaces/select interface" },
{ "level", wpa_cli_cmd_level, NULL,
cli_cmd_flag_none,
" = change debug level" },
{ "license", wpa_cli_cmd_license, NULL,
cli_cmd_flag_none,
"= show full wpa_cli license" },
{ "quit", wpa_cli_cmd_quit, NULL,
cli_cmd_flag_none,
"= exit wpa_cli" },
{ "set", wpa_cli_cmd_set, wpa_cli_complete_set,
cli_cmd_flag_none,
"= set variables (shows list of variables when run without "
"arguments)" },
{ "dump", wpa_cli_cmd_dump, NULL,
cli_cmd_flag_none,
"= dump config variables" },
{ "get", wpa_cli_cmd_get, wpa_cli_complete_get,
cli_cmd_flag_none,
" = get information" },
{ "logon", wpa_cli_cmd_logon, NULL,
cli_cmd_flag_none,
"= IEEE 802.1X EAPOL state machine logon" },
{ "logoff", wpa_cli_cmd_logoff, NULL,
cli_cmd_flag_none,
"= IEEE 802.1X EAPOL state machine logoff" },
{ "pmksa", wpa_cli_cmd_pmksa, NULL,
cli_cmd_flag_none,
"= show PMKSA cache" },
{ "pmksa_flush", wpa_cli_cmd_pmksa_flush, NULL,
cli_cmd_flag_none,
"= flush PMKSA cache entries" },
{ "reassociate", wpa_cli_cmd_reassociate, NULL,
cli_cmd_flag_none,
"= force reassociation" },
{ "reattach", wpa_cli_cmd_reattach, NULL,
cli_cmd_flag_none,
"= force reassociation back to the same BSS" },
{ "preauthenticate", wpa_cli_cmd_preauthenticate, wpa_cli_complete_bss,
cli_cmd_flag_none,
" = force preauthentication" },
{ "identity", wpa_cli_cmd_identity, NULL,
cli_cmd_flag_none,
" = configure identity for an SSID" },
{ "password", wpa_cli_cmd_password, NULL,
cli_cmd_flag_sensitive,
" = configure password for an SSID" },
{ "new_password", wpa_cli_cmd_new_password, NULL,
cli_cmd_flag_sensitive,
" = change password for an SSID" },
{ "pin", wpa_cli_cmd_pin, NULL,
cli_cmd_flag_sensitive,
" = configure pin for an SSID" },
{ "otp", wpa_cli_cmd_otp, NULL,
cli_cmd_flag_sensitive,
" = configure one-time-password for an SSID"
},
{ "passphrase", wpa_cli_cmd_passphrase, NULL,
cli_cmd_flag_sensitive,
" = configure private key passphrase\n"
" for an SSID" },
{ "sim", wpa_cli_cmd_sim, NULL,
cli_cmd_flag_sensitive,
" = report SIM operation result" },
{ "bssid", wpa_cli_cmd_bssid, NULL,
cli_cmd_flag_none,
" = set preferred BSSID for an SSID" },
{ "blacklist", wpa_cli_cmd_blacklist, wpa_cli_complete_bss,
cli_cmd_flag_none,
" = add a BSSID to the blacklist\n"
"blacklist clear = clear the blacklist\n"
"blacklist = display the blacklist" },
{ "log_level", wpa_cli_cmd_log_level, NULL,
cli_cmd_flag_none,
" [] = update the log level/timestamp\n"
"log_level = display the current log level and log options" },
{ "list_networks", wpa_cli_cmd_list_networks, NULL,
cli_cmd_flag_none,
"= list configured networks" },
{ "select_network", wpa_cli_cmd_select_network,
wpa_cli_complete_network_id,
cli_cmd_flag_none,
" = select a network (disable others)" },
{ "enable_network", wpa_cli_cmd_enable_network,
wpa_cli_complete_network_id,
cli_cmd_flag_none,
" = enable a network" },
{ "disable_network", wpa_cli_cmd_disable_network,
wpa_cli_complete_network_id,
cli_cmd_flag_none,
" = disable a network" },
{ "add_network", wpa_cli_cmd_add_network, NULL,
cli_cmd_flag_none,
"= add a network" },
{ "remove_network", wpa_cli_cmd_remove_network,
wpa_cli_complete_network_id,
cli_cmd_flag_none,
" = remove a network" },
{ "set_network", wpa_cli_cmd_set_network, wpa_cli_complete_network,
cli_cmd_flag_sensitive,
" = set network variables (shows\n"
" list of variables when run without arguments)" },
{ "get_network", wpa_cli_cmd_get_network, wpa_cli_complete_network,
cli_cmd_flag_none,
" = get network variables" },
{ "dup_network", wpa_cli_cmd_dup_network, wpa_cli_complete_dup_network,
cli_cmd_flag_none,
" = duplicate network variables"
},
{ "list_creds", wpa_cli_cmd_list_creds, NULL,
cli_cmd_flag_none,
"= list configured credentials" },
{ "add_cred", wpa_cli_cmd_add_cred, NULL,
cli_cmd_flag_none,
"= add a credential" },
{ "remove_cred", wpa_cli_cmd_remove_cred, NULL,
cli_cmd_flag_none,
" = remove a credential" },
{ "set_cred", wpa_cli_cmd_set_cred, NULL,
cli_cmd_flag_sensitive,
" = set credential variables" },
{ "get_cred", wpa_cli_cmd_get_cred, NULL,
cli_cmd_flag_none,
" = get credential variables" },
{ "save_config", wpa_cli_cmd_save_config, NULL,
cli_cmd_flag_none,
"= save the current configuration" },
{ "disconnect", wpa_cli_cmd_disconnect, NULL,
cli_cmd_flag_none,
"= disconnect and wait for reassociate/reconnect command before\n"
" connecting" },
{ "reconnect", wpa_cli_cmd_reconnect, NULL,
cli_cmd_flag_none,
"= like reassociate, but only takes effect if already disconnected"
},
{ "scan", wpa_cli_cmd_scan, NULL,
cli_cmd_flag_none,
"= request new BSS scan" },
{ "scan_results", wpa_cli_cmd_scan_results, NULL,
cli_cmd_flag_none,
"= get latest scan results" },
{ "bss", wpa_cli_cmd_bss, wpa_cli_complete_bss,
cli_cmd_flag_none,
"< | > = get detailed scan result info" },
{ "get_capability", wpa_cli_cmd_get_capability, NULL,
cli_cmd_flag_none,
" "
"= get capabilities" },
{ "reconfigure", wpa_cli_cmd_reconfigure, NULL,
cli_cmd_flag_none,
"= force wpa_supplicant to re-read its configuration file" },
{ "terminate", wpa_cli_cmd_terminate, NULL,
cli_cmd_flag_none,
"= terminate wpa_supplicant" },
{ "interface_add", wpa_cli_cmd_interface_add, NULL,
cli_cmd_flag_none,
" \n"
" = adds new interface, all parameters but \n"
" are optional" },
{ "interface_remove", wpa_cli_cmd_interface_remove, NULL,
cli_cmd_flag_none,
" = removes the interface" },
{ "interface_list", wpa_cli_cmd_interface_list, NULL,
cli_cmd_flag_none,
"= list available interfaces" },
{ "ap_scan", wpa_cli_cmd_ap_scan, NULL,
cli_cmd_flag_none,
" = set ap_scan parameter" },
{ "scan_interval", wpa_cli_cmd_scan_interval, NULL,
cli_cmd_flag_none,
" = set scan_interval parameter (in seconds)" },
{ "bss_expire_age", wpa_cli_cmd_bss_expire_age, NULL,
cli_cmd_flag_none,
" = set BSS expiration age parameter" },
{ "bss_expire_count", wpa_cli_cmd_bss_expire_count, NULL,
cli_cmd_flag_none,
" = set BSS expiration scan count parameter" },
{ "bss_flush", wpa_cli_cmd_bss_flush, NULL,
cli_cmd_flag_none,
" = set BSS flush age (0 by default)" },
{ "stkstart", wpa_cli_cmd_stkstart, NULL,
cli_cmd_flag_none,
" = request STK negotiation with " },
{ "ft_ds", wpa_cli_cmd_ft_ds, wpa_cli_complete_bss,
cli_cmd_flag_none,
" = request over-the-DS FT with " },
{ "wps_pbc", wpa_cli_cmd_wps_pbc, wpa_cli_complete_bss,
cli_cmd_flag_none,
"[BSSID] = start Wi-Fi Protected Setup: Push Button Configuration" },
{ "wps_pin", wpa_cli_cmd_wps_pin, wpa_cli_complete_bss,
cli_cmd_flag_sensitive,
" [PIN] = start WPS PIN method (returns PIN, if not "
"hardcoded)" },
{ "wps_check_pin", wpa_cli_cmd_wps_check_pin, NULL,
cli_cmd_flag_sensitive,
" = verify PIN checksum" },
{ "wps_cancel", wpa_cli_cmd_wps_cancel, NULL, cli_cmd_flag_none,
"Cancels the pending WPS operation" },
#ifdef CONFIG_WPS_NFC
{ "wps_nfc", wpa_cli_cmd_wps_nfc, wpa_cli_complete_bss,
cli_cmd_flag_none,
"[BSSID] = start Wi-Fi Protected Setup: NFC" },
{ "wps_nfc_config_token", wpa_cli_cmd_wps_nfc_config_token, NULL,
cli_cmd_flag_none,
" = build configuration token" },
{ "wps_nfc_token", wpa_cli_cmd_wps_nfc_token, NULL,
cli_cmd_flag_none,
" = create password token" },
{ "wps_nfc_tag_read", wpa_cli_cmd_wps_nfc_tag_read, NULL,
cli_cmd_flag_sensitive,
" = report read NFC tag with WPS data" },
{ "nfc_get_handover_req", wpa_cli_cmd_nfc_get_handover_req, NULL,
cli_cmd_flag_none,
" = create NFC handover request" },
{ "nfc_get_handover_sel", wpa_cli_cmd_nfc_get_handover_sel, NULL,
cli_cmd_flag_none,
" = create NFC handover select" },
{ "nfc_report_handover", wpa_cli_cmd_nfc_report_handover, NULL,
cli_cmd_flag_none,
" = report completed "
"NFC handover" },
#endif /* CONFIG_WPS_NFC */
{ "wps_reg", wpa_cli_cmd_wps_reg, wpa_cli_complete_bss,
cli_cmd_flag_sensitive,
" = start WPS Registrar to configure an AP" },
{ "wps_ap_pin", wpa_cli_cmd_wps_ap_pin, NULL,
cli_cmd_flag_sensitive,
"[params..] = enable/disable AP PIN" },
{ "wps_er_start", wpa_cli_cmd_wps_er_start, NULL,
cli_cmd_flag_none,
"[IP address] = start Wi-Fi Protected Setup External Registrar" },
{ "wps_er_stop", wpa_cli_cmd_wps_er_stop, NULL,
cli_cmd_flag_none,
"= stop Wi-Fi Protected Setup External Registrar" },
{ "wps_er_pin", wpa_cli_cmd_wps_er_pin, NULL,
cli_cmd_flag_sensitive,
" = add an Enrollee PIN to External Registrar" },
{ "wps_er_pbc", wpa_cli_cmd_wps_er_pbc, NULL,
cli_cmd_flag_none,
" = accept an Enrollee PBC using External Registrar" },
{ "wps_er_learn", wpa_cli_cmd_wps_er_learn, NULL,
cli_cmd_flag_sensitive,
" = learn AP configuration" },
{ "wps_er_set_config", wpa_cli_cmd_wps_er_set_config, NULL,
cli_cmd_flag_none,
" = set AP configuration for enrolling" },
{ "wps_er_config", wpa_cli_cmd_wps_er_config, NULL,
cli_cmd_flag_sensitive,
" = configure AP" },
#ifdef CONFIG_WPS_NFC
{ "wps_er_nfc_config_token", wpa_cli_cmd_wps_er_nfc_config_token, NULL,
cli_cmd_flag_none,
" = build NFC configuration token" },
#endif /* CONFIG_WPS_NFC */
{ "ibss_rsn", wpa_cli_cmd_ibss_rsn, NULL,
cli_cmd_flag_none,
" = request RSN authentication with in IBSS" },
#ifdef CONFIG_AP
{ "sta", wpa_cli_cmd_sta, NULL,
cli_cmd_flag_none,
" = get information about an associated station (AP)" },
{ "all_sta", wpa_cli_cmd_all_sta, NULL,
cli_cmd_flag_none,
"= get information about all associated stations (AP)" },
{ "deauthenticate", wpa_cli_cmd_deauthenticate, NULL,
cli_cmd_flag_none,
" = deauthenticate a station" },
{ "disassociate", wpa_cli_cmd_disassociate, NULL,
cli_cmd_flag_none,
" = disassociate a station" },
{ "chan_switch", wpa_cli_cmd_chanswitch, NULL,
cli_cmd_flag_none,
" [sec_channel_offset=] [center_freq1=]"
" [center_freq2=] [bandwidth=] [blocktx] [ht|vht]"
" = CSA parameters" },
#endif /* CONFIG_AP */
{ "suspend", wpa_cli_cmd_suspend, NULL, cli_cmd_flag_none,
"= notification of suspend/hibernate" },
{ "resume", wpa_cli_cmd_resume, NULL, cli_cmd_flag_none,
"= notification of resume/thaw" },
#ifdef CONFIG_TESTING_OPTIONS
{ "drop_sa", wpa_cli_cmd_drop_sa, NULL, cli_cmd_flag_none,
"= drop SA without deauth/disassoc (test command)" },
#endif /* CONFIG_TESTING_OPTIONS */
{ "roam", wpa_cli_cmd_roam, wpa_cli_complete_bss,
cli_cmd_flag_none,
" = roam to the specified BSS" },
#ifdef CONFIG_MESH
{ "mesh_interface_add", wpa_cli_cmd_mesh_interface_add, NULL,
cli_cmd_flag_none,
"[ifname] = Create a new mesh interface" },
{ "mesh_group_add", wpa_cli_cmd_mesh_group_add, NULL,
cli_cmd_flag_none,
" = join a mesh network (disable others)" },
{ "mesh_group_remove", wpa_cli_cmd_mesh_group_remove, NULL,
cli_cmd_flag_none,
" = Remove mesh group interface" },
#endif /* CONFIG_MESH */
#ifdef CONFIG_P2P
{ "p2p_find", wpa_cli_cmd_p2p_find, wpa_cli_complete_p2p_find,
cli_cmd_flag_none,
"[timeout] [type=*] = find P2P Devices for up-to timeout seconds" },
{ "p2p_stop_find", wpa_cli_cmd_p2p_stop_find, NULL, cli_cmd_flag_none,
"= stop P2P Devices search" },
{ "p2p_asp_provision", wpa_cli_cmd_p2p_asp_provision, NULL,
cli_cmd_flag_none,
" adv_id= conncap= [info=] = provision with a P2P ASP Device" },
{ "p2p_asp_provision_resp", wpa_cli_cmd_p2p_asp_provision_resp, NULL,
cli_cmd_flag_none,
" adv_id= [role] [info=] = provision with a P2P ASP Device" },
{ "p2p_connect", wpa_cli_cmd_p2p_connect, wpa_cli_complete_p2p_connect,
cli_cmd_flag_none,
" <\"pbc\"|PIN> [ht40] = connect to a P2P Device" },
{ "p2p_listen", wpa_cli_cmd_p2p_listen, NULL, cli_cmd_flag_none,
"[timeout] = listen for P2P Devices for up-to timeout seconds" },
{ "p2p_group_remove", wpa_cli_cmd_p2p_group_remove,
wpa_cli_complete_p2p_group_remove, cli_cmd_flag_none,
" = remove P2P group interface (terminate group if GO)" },
{ "p2p_group_add", wpa_cli_cmd_p2p_group_add, NULL, cli_cmd_flag_none,
"[ht40] = add a new P2P group (local end as GO)" },
{ "p2p_prov_disc", wpa_cli_cmd_p2p_prov_disc,
wpa_cli_complete_p2p_peer, cli_cmd_flag_none,
" = request provisioning discovery" },
{ "p2p_get_passphrase", wpa_cli_cmd_p2p_get_passphrase, NULL,
cli_cmd_flag_none,
"= get the passphrase for a group (GO only)" },
{ "p2p_serv_disc_req", wpa_cli_cmd_p2p_serv_disc_req,
wpa_cli_complete_p2p_peer, cli_cmd_flag_none,
" = schedule service discovery request" },
{ "p2p_serv_disc_cancel_req", wpa_cli_cmd_p2p_serv_disc_cancel_req,
NULL, cli_cmd_flag_none,
" = cancel pending service discovery request" },
{ "p2p_serv_disc_resp", wpa_cli_cmd_p2p_serv_disc_resp, NULL,
cli_cmd_flag_none,
" },
{ "p2p_service_update", wpa_cli_cmd_p2p_service_update, NULL,
cli_cmd_flag_none,
"= indicate change in local services" },
{ "p2p_serv_disc_external", wpa_cli_cmd_p2p_serv_disc_external, NULL,
cli_cmd_flag_none,
" = set external processing of service discovery" },
{ "p2p_service_flush", wpa_cli_cmd_p2p_service_flush, NULL,
cli_cmd_flag_none,
"= remove all stored service entries" },
{ "p2p_service_add", wpa_cli_cmd_p2p_service_add, NULL,
cli_cmd_flag_none,
" = add a local "
"service" },
{ "p2p_service_rep", wpa_cli_cmd_p2p_service_rep, NULL,
cli_cmd_flag_none,
"asp [] = replace "
"local ASP service" },
{ "p2p_service_del", wpa_cli_cmd_p2p_service_del, NULL,
cli_cmd_flag_none,
" [|service] = remove a local "
"service" },
{ "p2p_reject", wpa_cli_cmd_p2p_reject, wpa_cli_complete_p2p_peer,
cli_cmd_flag_none,
" = reject connection attempts from a specific peer" },
{ "p2p_invite", wpa_cli_cmd_p2p_invite, NULL,
cli_cmd_flag_none,
" [peer=addr] = invite peer" },
{ "p2p_peers", wpa_cli_cmd_p2p_peers, NULL, cli_cmd_flag_none,
"[discovered] = list known (optionally, only fully discovered) P2P "
"peers" },
{ "p2p_peer", wpa_cli_cmd_p2p_peer, wpa_cli_complete_p2p_peer,
cli_cmd_flag_none,
" = show information about known P2P peer" },
{ "p2p_set", wpa_cli_cmd_p2p_set, wpa_cli_complete_p2p_set,
cli_cmd_flag_none,
" = set a P2P parameter" },
{ "p2p_flush", wpa_cli_cmd_p2p_flush, NULL, cli_cmd_flag_none,
"= flush P2P state" },
{ "p2p_cancel", wpa_cli_cmd_p2p_cancel, NULL, cli_cmd_flag_none,
"= cancel P2P group formation" },
{ "p2p_unauthorize", wpa_cli_cmd_p2p_unauthorize,
wpa_cli_complete_p2p_peer, cli_cmd_flag_none,
" = unauthorize a peer" },
{ "p2p_presence_req", wpa_cli_cmd_p2p_presence_req, NULL,
cli_cmd_flag_none,
"[ ] [ ] = request GO "
"presence" },
{ "p2p_ext_listen", wpa_cli_cmd_p2p_ext_listen, NULL,
cli_cmd_flag_none,
"[ ] = set extended listen timing" },
{ "p2p_remove_client", wpa_cli_cmd_p2p_remove_client,
wpa_cli_complete_p2p_peer, cli_cmd_flag_none,
" = remove a peer from all groups" },
#endif /* CONFIG_P2P */
#ifdef CONFIG_WIFI_DISPLAY
{ "wfd_subelem_set", wpa_cli_cmd_wfd_subelem_set, NULL,
cli_cmd_flag_none,
" [contents] = set Wi-Fi Display subelement" },
{ "wfd_subelem_get", wpa_cli_cmd_wfd_subelem_get, NULL,
cli_cmd_flag_none,
" = get Wi-Fi Display subelement" },
#endif /* CONFIG_WIFI_DISPLAY */
#ifdef CONFIG_INTERWORKING
{ "fetch_anqp", wpa_cli_cmd_fetch_anqp, NULL, cli_cmd_flag_none,
"= fetch ANQP information for all APs" },
{ "stop_fetch_anqp", wpa_cli_cmd_stop_fetch_anqp, NULL,
cli_cmd_flag_none,
"= stop fetch_anqp operation" },
{ "interworking_select", wpa_cli_cmd_interworking_select, NULL,
cli_cmd_flag_none,
"[auto] = perform Interworking network selection" },
{ "interworking_connect", wpa_cli_cmd_interworking_connect,
wpa_cli_complete_bss, cli_cmd_flag_none,
" = connect using Interworking credentials" },
{ "interworking_add_network", wpa_cli_cmd_interworking_add_network,
wpa_cli_complete_bss, cli_cmd_flag_none,
" = connect using Interworking credentials" },
{ "anqp_get", wpa_cli_cmd_anqp_get, wpa_cli_complete_bss,
cli_cmd_flag_none,
" [,]... = request ANQP information" },
{ "gas_request", wpa_cli_cmd_gas_request, wpa_cli_complete_bss,
cli_cmd_flag_none,
" [QueryReq] = GAS request" },
{ "gas_response_get", wpa_cli_cmd_gas_response_get,
wpa_cli_complete_bss, cli_cmd_flag_none,
" },
#endif /* CONFIG_INTERWORKING */
#ifdef CONFIG_HS20
{ "hs20_anqp_get", wpa_cli_cmd_hs20_anqp_get, wpa_cli_complete_bss,
cli_cmd_flag_none,
" [,]... = request HS 2.0 ANQP information"
},
{ "nai_home_realm_list", wpa_cli_cmd_get_nai_home_realm_list,
wpa_cli_complete_bss, cli_cmd_flag_none,
" = get HS20 nai home realm list" },
{ "hs20_icon_request", wpa_cli_cmd_hs20_icon_request,
wpa_cli_complete_bss, cli_cmd_flag_none,
" = get Hotspot 2.0 OSU icon" },
{ "fetch_osu", wpa_cli_cmd_fetch_osu, NULL, cli_cmd_flag_none,
"= fetch OSU provider information from all APs" },
{ "cancel_fetch_osu", wpa_cli_cmd_cancel_fetch_osu, NULL,
cli_cmd_flag_none,
"= cancel fetch_osu command" },
#endif /* CONFIG_HS20 */
{ "sta_autoconnect", wpa_cli_cmd_sta_autoconnect, NULL,
cli_cmd_flag_none,
"<0/1> = disable/enable automatic reconnection" },
{ "tdls_discover", wpa_cli_cmd_tdls_discover, NULL,
cli_cmd_flag_none,
" = request TDLS discovery with " },
{ "tdls_setup", wpa_cli_cmd_tdls_setup, NULL,
cli_cmd_flag_none,
" = request TDLS setup with " },
{ "tdls_teardown", wpa_cli_cmd_tdls_teardown, NULL,
cli_cmd_flag_none,
" = tear down TDLS with " },
{ "tdls_link_status", wpa_cli_cmd_tdls_link_status, NULL,
cli_cmd_flag_none,
" = TDLS link status with " },
{ "wmm_ac_addts", wpa_cli_cmd_wmm_ac_addts, NULL,
cli_cmd_flag_none,
" [nominal_msdu_size=#] "
"[mean_data_rate=#] [min_phy_rate=#] [sba=#] [fixed_nominal_msdu] "
"= add WMM-AC traffic stream" },
{ "wmm_ac_delts", wpa_cli_cmd_wmm_ac_delts, NULL,
cli_cmd_flag_none,
" = delete WMM-AC traffic stream" },
{ "wmm_ac_status", wpa_cli_cmd_wmm_ac_status, NULL,
cli_cmd_flag_none,
"= show status for Wireless Multi-Media Admission-Control" },
{ "tdls_chan_switch", wpa_cli_cmd_tdls_chan_switch, NULL,
cli_cmd_flag_none,
" [sec_channel_offset=] [center_freq1=] "
"[center_freq2=] [bandwidth=] [ht|vht] = enable channel switching "
"with TDLS peer" },
{ "tdls_cancel_chan_switch", wpa_cli_cmd_tdls_cancel_chan_switch, NULL,
cli_cmd_flag_none,
" = disable channel switching with TDLS peer " },
{ "signal_poll", wpa_cli_cmd_signal_poll, NULL,
cli_cmd_flag_none,
"= get signal parameters" },
{ "pktcnt_poll", wpa_cli_cmd_pktcnt_poll, NULL,
cli_cmd_flag_none,
"= get TX/RX packet counters" },
{ "reauthenticate", wpa_cli_cmd_reauthenticate, NULL,
cli_cmd_flag_none,
"= trigger IEEE 802.1X/EAPOL reauthentication" },
#ifdef CONFIG_AUTOSCAN
{ "autoscan", wpa_cli_cmd_autoscan, NULL, cli_cmd_flag_none,
"[params] = Set or unset (if none) autoscan parameters" },
#endif /* CONFIG_AUTOSCAN */
#ifdef CONFIG_WNM
{ "wnm_sleep", wpa_cli_cmd_wnm_sleep, NULL, cli_cmd_flag_none,
" [interval=#] = enter/exit WNM-Sleep mode" },
{ "wnm_bss_query", wpa_cli_cmd_wnm_bss_query, NULL, cli_cmd_flag_none,
" = Send BSS Transition Management Query" },
#endif /* CONFIG_WNM */
{ "raw", wpa_cli_cmd_raw, NULL, cli_cmd_flag_sensitive,
" = Sent unprocessed command" },
{ "flush", wpa_cli_cmd_flush, NULL, cli_cmd_flag_none,
"= flush wpa_supplicant state" },
#ifdef ANDROID
{ "driver", wpa_cli_cmd_driver, NULL, cli_cmd_flag_none,
" = driver private commands" },
#endif /* ANDROID */
{ "radio_work", wpa_cli_cmd_radio_work, NULL, cli_cmd_flag_none,
"= radio_work " },
{ "vendor", wpa_cli_cmd_vendor, NULL, cli_cmd_flag_none,
" [] = Send vendor command"
},
{ "neighbor_rep_request",
wpa_cli_cmd_neighbor_rep_request, NULL, cli_cmd_flag_none,
"[ssid=] = Trigger request to AP for neighboring AP report "
"(with optional given SSID, default: current SSID)"
},
{ "erp_flush", wpa_cli_cmd_erp_flush, NULL, cli_cmd_flag_none,
"= flush ERP keys" },
{ "mac_rand_scan",
wpa_cli_cmd_mac_rand_scan, NULL, cli_cmd_flag_none,
" enable=<0/1> [addr=mac-address "
"mask=mac-address-mask] = scan MAC randomization"
},
{ NULL, NULL, NULL, cli_cmd_flag_none, NULL }
};
用户输入命令之后就是从这个列表中查找对应的函数的。
这里面以status命令为例看一下
static int wpa_cli_cmd_status(struct wpa_ctrl *ctrl, int argc, char *argv[])
{
if (argc > 0 && os_strcmp(argv[0], "verbose") == 0)
return wpa_ctrl_command(ctrl, "STATUS-VERBOSE");
if (argc > 0 && os_strcmp(argv[0], "wps") == 0)
return wpa_ctrl_command(ctrl, "STATUS-WPS");
if (argc > 0 && os_strcmp(argv[0], "driver") == 0)
return wpa_ctrl_command(ctrl, "STATUS-DRIVER");
return wpa_ctrl_command(ctrl, "STATUS");
}
最终会调用到
int wpa_ctrl_request(struct wpa_ctrl *ctrl, const char *cmd, size_t cmd_len,
char *reply, size_t *reply_len,
void (*msg_cb)(char *msg, size_t len))
{
DWORD written;
DWORD readlen = *reply_len;
if (!WriteFile(ctrl->pipe, cmd, cmd_len, &written, NULL))
return -1;
if (!ReadFile(ctrl->pipe, reply, *reply_len, &readlen, NULL))
return -1;
*reply_len = readlen;
return 0;
}
就是把命令写入到已经与supplicant连接上的socket里面。
以上就是Wpa_cli的流程分析。
通过上述的分析，能够理解上层应用是如何与supplicant建立起连接的，以及命令是如何发送个supplicant的。
Android 中的wifi.c中也是与wpa_supplicant建立socket，之后将命令发送给wpa_supplicant的。