WL18xx R8.4 Multicast

Hi,

This is not expected...
Can you share the exact recreation steps so I can try it on my setup here?

Regards,
Gigi Joseph.

Hi Joseph:

  Here are my test steps in both R8.3SP1 and R8.4, and only R8.3SP1 can receive the multicast. The kernel configuration is identical.

1. Insert modules including compat.ko, cfg80211.ko, mac80211.ko, wlcore.ko, wl18xx.ko, wlcore_sdio.ko ( We use  sdio interface to connect WL1803)

2. iw reg set US

3. ifconfig wlan0 192.168.11.1 netmask 255.255.255.0 up

4. hostapd -B /tmp/hostapd.v2.ol_r8.a8.10.conf -P /tmp/hostapd.pid

Start hostapd in 2.4GHz by using following configurations:

=========================================

driver=nl80211
logger_syslog=-1
logger_syslog_level=2
logger_stdout=-1
logger_stdout_level=2
dump_file=/tmp/hostapd.dump
ctrl_interface=/var/run/hostapd
hw_mode=g
channel=1
beacon_int=100
dtim_period=2
max_num_sta=255
rts_threshold=2347
fragm_threshold=2346
supported_rates=60 120 240 360 480 540
basic_rates=60 120 240
preamble=1
ignore_broadcast_ssid=0
wpa_group_rekey=0
wpa_gmk_rekey=0
wpa_ptk_rekey=0
interface=wlan0
ssid=OL_R8_A8_10
macaddr_acl=0
auth_algs=3
wmm_enabled=1
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0
uapsd_advertisement_enabled=1
wep_rekey_period=0
own_ip_addr=127.0.0.1

ap_table_max_size=255
ap_table_expiration_time=60
wps_state=2
ap_setup_locked=1
uuid=12345678-9abc-def0-1234-56789abcdef0
eap_server=1
disassoc_low_ack=1
ap_max_inactivity=10000
ieee80211n=1
ht_capab=[SHORT-GI-20]
# information elements
device_name=Blaze
manufacturer=TexasInstruments
model_name=TI_Connectivity_module
model_number=wl18xx
serial_number=12345
device_type=0-00000000-0
wpa=3

wpa_passphrase=12345678

wpa_key_mgmt=WPA-PSK

wpa_pairwise=CCMP TKIP
==============================================

5. route add -net 0.0.0.0 gw 192.168.11.1 dev wlan0

6. route add -net 224.1.1.1 netmask 255.255.255.255 wlan0

7. route add -net 239.1.1.1 netmask 255.255.255.255 wlan0

8. Start DHCP server in background

9. Start a Multicast receiver.

==================================

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/msg.h>
#include <time.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <sched.h>
#include <pthread.h>
#include <signal.h>

    #define DEBUG(args...)              \
            fprintf( stdout, args);     \
            fflush( stdout);

static int discover_fd = 0;

static void BindSocket(char *pInterface)
{
    struct sockaddr_in  s;
    int                 on = 1;
    struct ip_mreq      mreq;
    const int           loopback = 0; /* no loopback */
    int                 RC = 0;

    /* Clean discover_fd */
    if(discover_fd > 0)
    {
        close(discover_fd);
        discover_fd = 0;
    }

    do
    {
        /* Open discover socket */
        if((discover_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
        {
            DEBUG("Discover socket create error\n");
            break;
        }

        s.sin_family      = AF_INET;
        s.sin_addr.s_addr = htonl(INADDR_ANY);
        s.sin_port        = htons(3455);

        if(bind(discover_fd, (struct sockaddr *) &s, sizeof(s)))
        {
            DEBUG("socket bind error\n");
            break;
        }

        if(ioctl(discover_fd, FIONBIO, &on) < 0)
        {
            DEBUG("socket ioctl error\n");
            break;
        }

        /* join a multicast group */
        if(setsockopt(discover_fd,IPPROTO_IP,IP_MULTICAST_LOOP,
                      (char*)&loopback,sizeof(loopback)) != 0)
        {
            DEBUG("socket error IP_MULTICAST_LOOP\n");
            break;
        }

        mreq.imr_multiaddr.s_addr = inet_addr("224.1.1.1");
        mreq.imr_interface.s_addr = INADDR_ANY;
        if(setsockopt(discover_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
                     (char *)&mreq, sizeof(mreq)) != 0)
        {
            DEBUG("socket error join multicast\n");
            break;
        }

        RC = 1;
    } while(0);

    if(RC)
    {
        DEBUG("socket init OK on %s, enter service loop\n", pInterface);
    }
    else
    {
        if(discover_fd > 0)
        {
            close(discover_fd);
            discover_fd = 0;
        }
    }
}

void ThreadInit( void)
{
    BindSocket("wlan0");
}

static void ResponseMsg(int sockfd)
{
    char               recvMsg[1600];
    int                 len;
    struct sockaddr_in  from;
    int                 fromLen = sizeof(from)/sizeof(char);

    memset(recvMsg, 0x0, 1600);
    len = recvfrom(sockfd,
                   recvMsg,
                   1400,
                   0,
                   (struct sockaddr *)&from,
                   (socklen_t *)&fromLen);

    if(len > 0)
    {

        DEBUG("received: %s\r\n", recvMsg);

    }
}

void ThreadLoop( void)
{
    fd_set          read_fd;
    struct timeval  seltime;

    DEBUG("ThreadLoop %s: %s\r\n", __DATE__, __TIME__);

    /* setup signal handlers */
    FD_ZERO(&read_fd);
    if(discover_fd > 0)
    {
        FD_SET(discover_fd, &read_fd);

        seltime.tv_sec  = 1;
        seltime.tv_usec = 0;
        if(select(discover_fd+1, &read_fd, 0, 0, &seltime) < 0)
        {
            /* Some errors happened */
            DEBUG("select error, abort**********\r\n");
            return;
        }

        if(FD_ISSET(discover_fd, &read_fd))
        {
            DEBUG("Discover receive\r\n");
            ResponseMsg( discover_fd);
        }
        else
        {
            DEBUG("Discover: select timeout\r\n");
        }

    }
}

int main( void)
{
    struct  timeval selTime;

    ThreadInit();

    while(1)
    {
        ThreadLoop();

        selTime.tv_sec  = 0;
        selTime.tv_usec = 5000;
        select( 0, NULL, NULL, NULL, &selTime);
    }

    return 0;
}

=============================

10. When using R8.3SP1, we are able to receive the multicast 224.1.1.1 in the application, but with R8.4, we receive nothing. Even we change the step 6 to use a mask 240.0.0.0 to include all multicast.

Regards,

/ckhsu

Hi Joseph:

  By the way, for the broadcast, the normal AP will forward a broadcast packet ( To 255.255.255.255 FF-FF-FF-FF-FF-FF)to other STA. But in WL18xx AP mode, it can rceive the packet in AP application, but will not receive in the STA connect to that WL18xx AP.

Regards,

/ckhsu

Dear Sirs:

  Is there any progress on the issue or I should told the customer for this situation?

Regards,

/ckhsu

Dear Sirs:

  Please skip the broadcast, focus on the multicast issue. The broadcast is now confirmed just a configuration issue on our environment.

Regards,

/ckhsu

Dear Sirs:

  Not only receiving, but also sending multicast is impossible in this version.

 I also tried to use the LLDP in linux,

http://vincentbernat.github.io/lldpd/

  And clearly, it is not working in R8.4.

Regards,

/ckhsu

Hi,

I just tried your app on R 8.4 and could receive multicast packets successfully... The only difference is, I used the conf files (hostapd.conf/udhcpd.conf) from http://processors.wiki.ti.com/index.php/WiLink8_WLAN_Demo:_Linux#AP_.28create_AP_with_no_security.29

I think you can start with this version, and keep adding your specific parameters. Some of them are not supported.
For eg: max_num_sta in your case is "255". We don't support this. The max supported is "10".

Please see "wl18xx-target-scripts/conf/hostapd.conf" for the supported parameters & value.

Regards,
Gigi Joseph.

Hi Joseph:

  Thank you for the reply. And we tried in max_num_sta=10, but the result is the same. And we will tried again in no encryption mode.

  Can you tell us what's the version of SDK you are using? We are testing this in SDK6.0 kernel.

Regards,

/ckhsu

Hi,

I used SDK 7.0 - with the hostapd.conf I mentioned.

You can try with the same hostapd.conf that I used and confirm if it works at your end too and then add each parameter for your specific usecase. 

Regards,
Gigi Joseph.

Joseph Gigi said:

think you can start with this version, and keep adding your specific parameters. Some of them are not supported

Hi Joseph,

Can you comment on driver support for multicast? If supported, which driver version did it start?

Patrick