Modo de ponto de acesso Hotspot no BCM4313
O BCM4313 pode operar no modo AP usando o driver brcmsmac , a partir do kernel do 3.10 linux em diante. Por muito tempo, o BCM4313 não tinha suporte ao modo AP sob nenhum driver linux. Mas agora, você teve sorte, pois tanto o AdHoc (IBSS) quanto o modo AP foram implementados para brcmsmac . Então, para fazer o modo AP funcionar para o BCM4313, você precisa de um kernel Linux mais novo que o 3.10. Use o Ubuntu 12.04.5LTS , o Ubuntu 14.04LTS ou uma versão mais recente. Se você estiver usando uma versão do Ubuntu 12.04LTS anterior a 12.04.5, instale o pacote linux-generic-lts-trusty .
Para mais detalhes sobre como atualizar o kernel do 12.04LTS, visite este link .
Quando você tiver um kernel adequado, verifique se não está executando outros drivers da Broadcom, como bcmwl-kernel-source , b43 , etc. Se sim, desinstale-os. Não é necessário instalar explicitamente brcmsmac , já que ele já é um módulo pré-instalado no kernel do Linux. Agora, crie um ponto de acesso de acordo com o esta resposta . Esta é uma configuração personalizada de hostapd que uso com a placa wireless BCM4313 :
#####Basic Settings########################
#sets the wifi interface to use, is wlan0 in most cases
interface=wlan0
#driver to use, nl80211 works in most cases
driver=nl80211
#Access Point name
#Replace it with ssid=<YourHotspotName>
ssid=HEXspot
#####Channel and Mode Settings#############
# Operation mode (a = IEEE 802.11a, b = IEEE 802.11b, g = IEEE 802.11g,
# ad = IEEE 802.11ad (60 GHz); a/g options are used with IEEE 802.11n, too, to
# specify band)
# Default: IEEE 802.11b
hw_mode=g
# WiFi Channel:
channel=11
##### IEEE 802.11n related configuration ##
#WMM needs to be enabled for full HT functionality
wmm_enabled=1
# ieee80211n: Whether IEEE 802.11n (HT) is enabled
# 0 = disabled (default)
# 1 = enabled
# Note: You will also need to enable WMM for full HT functionality.
ieee80211n=1
# ht_capab: HT capabilities (list of flags)
# LDPC coding capability: [LDPC] = supported
# Supported channel width set: [HT40-] = both 20 MHz and 40 MHz with secondary
# channel below the primary channel; [HT40+] = both 20 MHz and 40 MHz
# with secondary channel below the primary channel
# (20 MHz only if neither is set)
# Note: There are limits on which channels can be used with HT40- and
# HT40+. Following table shows the channels that may be available for
# HT40- and HT40+ use per IEEE 802.11n Annex J:
# freq HT40- HT40+
# 2.4 GHz 5-13 1-7 (1-9 in Europe/Japan)
# 5 GHz 40,48,56,64 36,44,52,60
# (depending on the location, not all of these channels may be available
# for use)
# Please note that 40 MHz channels may switch their primary and secondary
# channels if needed or creation of 40 MHz channel maybe rejected based
# on overlapping BSSes. These changes are done automatically when hostapd
# is setting up the 40 MHz channel.
# Spatial Multiplexing (SM) Power Save: [SMPS-STATIC] or [SMPS-DYNAMIC]
# (SMPS disabled if neither is set)
# HT-greenfield: [GF] (disabled if not set)
# Short GI for 20 MHz: [SHORT-GI-20] (disabled if not set)
# Short GI for 40 MHz: [SHORT-GI-40] (disabled if not set)
# Tx STBC: [TX-STBC] (disabled if not set)
# Rx STBC: [RX-STBC1] (one spatial stream), [RX-STBC12] (one or two spatial
# streams), or [RX-STBC123] (one, two, or three spatial streams); Rx STBC
# disabled if none of these set
# HT-delayed Block Ack: [DELAYED-BA] (disabled if not set)
# Maximum A-MSDU length: [MAX-AMSDU-7935] for 7935 octets (3839 octets if not
# set)
# DSSS/CCK Mode in 40 MHz: [DSSS_CCK-40] = allowed (not allowed if not set)
# PSMP support: [PSMP] (disabled if not set)
# L-SIG TXOP protection support: [LSIG-TXOP-PROT] (disabled if not set)
ht_capab=[HT40][GF][SHORT-GI-40][SHORT-GI-20]
# Require stations to support HT PHY (reject association if they do not)
require_ht=1
#####Security and Authentication###########
#macaddr_acl sets options for mac address filtering. 0 means "accept unless in deny list"
macaddr_acl=0
#Sets authentication algorithm
#1 - only open system authentication
#2 - both open system authentication and shared key authentication
auth_algs=1
#setting ignore_broadcast_ssid to 1 will disable the broadcasting of ssid
ignore_broadcast_ssid=0
#####Sets WPA and WPA2 authentication######
#wpa option sets which wpa implementation to use
#1 - wpa only
#2 - wpa2 only
#3 - both
wpa=2
#sets WPA Password required by the clients to authenticate themselves on the network
#Replace it with wpa_passphrase=<Password you wish to use>
wpa_passphrase=anything
#sets wpa key management
wpa_key_mgmt=WPA-PSK
#sets encryption used by WPA2
rsn_pairwise=CCMP
Esta configuração permite que hostapd inicie o ponto de acesso do modo 802.11n para o BCM4313. Você pode usar isso em vez da configuração genérica do modo g descrita Aqui .