bgscan.c revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4
18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * WPA Supplicant - background scan and roaming interface 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "wpa_supplicant_i.h" 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "config_ssid.h" 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "bgscan.h" 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_BGSCAN_SIMPLE 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtextern const struct bgscan_ops bgscan_simple_ops; 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_BGSCAN_SIMPLE */ 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_BGSCAN_LEARN 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtextern const struct bgscan_ops bgscan_learn_ops; 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_BGSCAN_LEARN */ 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const struct bgscan_ops * bgscan_modules[] = { 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_BGSCAN_SIMPLE 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &bgscan_simple_ops, 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_BGSCAN_SIMPLE */ 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_BGSCAN_LEARN 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &bgscan_learn_ops, 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_BGSCAN_LEARN */ 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt NULL 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *name = ssid->bgscan; 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *params; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t nlen; 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int i; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct bgscan_ops *ops = NULL; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt bgscan_deinit(wpa_s); 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (name == NULL) 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt params = os_strchr(name, ':'); 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (params == NULL) { 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt params = ""; 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt nlen = os_strlen(name); 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt nlen = params - name; 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt params++; 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 0; bgscan_modules[i]; i++) { 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) { 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ops = bgscan_modules[i]; 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ops == NULL) { 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "bgscan: Could not find module " 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "matching the parameter '%s'", name); 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid); 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wpa_s->bgscan_priv == NULL) 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan = ops; 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with " 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "parameters '%s'", ops->name, params); 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid bgscan_deinit(struct wpa_supplicant *wpa_s) 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wpa_s->bgscan && wpa_s->bgscan_priv) { 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'", 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan->name); 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan->deinit(wpa_s->bgscan_priv); 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan = NULL; 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan_priv = NULL; 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint bgscan_notify_scan(struct wpa_supplicant *wpa_s, 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpa_scan_results *scan_res) 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wpa_s->bgscan && wpa_s->bgscan_priv) 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv, 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt scan_res); 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s) 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wpa_s->bgscan && wpa_s->bgscan_priv) 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv); 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above, 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int current_signal, int current_noise, 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int current_txrate) 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wpa_s->bgscan && wpa_s->bgscan_priv) 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above, 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt current_signal, 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt current_noise, 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt current_txrate); 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 118