[ath9k-devel] Set vendor specific element ID in probe request

[ath9k-devel] Set vendor specific element ID in probe request

[Amith Belur]

Help needed, newbie here. I am trying to find how to set vendor specific
element id in probe request and I am not quite clear how to do this. Any
pointers would be really helpful.

Thanks

-- 
Best Regards,
Amith
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[ath9k-devel] Set vendor specific element ID in probe request

[Wojciech Dubowik]

On 06/11/2012 01:07 PM, Amith Belur wrote:
> Help needed, newbie here. I am trying to find how to set vendor 
> specific element id in probe request and I am not quite clear how to 
> do this. Any pointers would be really helpful.

I have used changes below to send vendor data in probe responses. It's 
in mac80211 so you can
use it with other drivers as well i.e. mac80211_hwsim.

vendor_data_oui is just debugfs entry but you might just get rid of this 
and add your own control.
At the moment I am using 16-bit for data but you can send what you want. 
Just add your struct
instead of vendor_data_value and change IE length.

This is just part of my testing patchest and it hasn't been reviewed, 
cleaned, etc. I have also patch to send
vendor data in beacons based on debugfs entries (fast) or through 
hostapd (slow). I don't plan to publish
them unless there is general interest in it. It's "vendor specific" so 
applications and means of control can
vary...

Br,
Wojtek

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4b1319b..ac58a1b 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1465,6 +1465,7 @@ void ieee80211_xmit(struct ieee80211_sub_if_data 
*sdata, struct sk_buff *skb)
      struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
      int headroom;
      bool may_encrypt;
+    u8 *pos;

      rcu_read_lock();

@@ -1485,6 +1486,32 @@ void ieee80211_xmit(struct ieee80211_sub_if_data 
*sdata, struct sk_buff *skb)
      hdr = (struct ieee80211_hdr *) skb->data;
      info->control.vif = &sdata->vif;

+    /* Add vendor specific data to probe response (if present) */
+    if (ieee80211_is_probe_resp(hdr->frame_control) &&
+        !(info->control.vif->bss_conf.vendor_data_oui[0] == 0 &&
+        info->control.vif->bss_conf.vendor_data_oui[1] == 0 &&
+        info->control.vif->bss_conf.vendor_data_oui[2] == 0)) {
+
+            if (skb->end - skb->tail < 8)
+                pskb_expand_head(skb, 0, 8, GFP_ATOMIC);
+
+            if (skb->end - skb->tail > 8) {
+                pos = (u8 *) skb_put(skb, 8);
+                *pos++ = WLAN_EID_VENDOR_SPECIFIC;
+                *pos++ = 3 + 1 + 2; /* oui, type, data16 */
+                memcpy(pos, info->control.vif->bss_conf.vendor_data_oui,
+                        
sizeof(info->control.vif->bss_conf.vendor_data_oui));
+                pos += sizeof(info->control.vif->bss_conf.vendor_data_oui);
+                *pos++ = info->control.vif->bss_conf.vendor_data_type;
+                memcpy(pos, &info->control.vif->bss_conf.vendor_data_value,
+                        
sizeof(info->control.vif->bss_conf.vendor_data_value));
+            } else {
+                printk(KERN_DEBUG "%s: Unable to add vendor data to 
probe response"
+                                   " directed to %pM\n", sdata->name,
+                                   hdr->addr1);
+            }
+    }
+
      if (ieee80211_vif_is_mesh(&sdata->vif) &&
          ieee80211_is_data(hdr->frame_control) &&
          !is_multicast_ether_addr(hdr->addr1) &&
>
> Thanks
>
> -- 
> Best Regards,
> Amith
>
>
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel

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[ath9k-devel] Set vendor specific element ID in probe request

[Wojciech Dubowik]

I have got confused myself. It should be probe request and not probe 
response.
Mechanism is same but you need to modify ieee80211_probereq_get in tx.c

Br,
Wojtek
> On 06/11/2012 01:07 PM, Amith Belur wrote:
>> Help needed, newbie here. I am trying to find how to set vendor 
>> specific element id in probe request and I am not quite clear how to 
>> do this. Any pointers would be really helpful.
>
> I have used changes below to send vendor data in probe responses. It's 
> in mac80211 so you can
> use it with other drivers as well i.e. mac80211_hwsim.
>
> vendor_data_oui is just debugfs entry but you might just get rid of 
> this and add your own control.
> At the moment I am using 16-bit for data but you can send what you 
> want. Just add your struct
> instead of vendor_data_value and change IE length.
>
> This is just part of my testing patchest and it hasn't been reviewed, 
> cleaned, etc. I have also patch to send
> vendor data in beacons based on debugfs entries (fast) or through 
> hostapd (slow). I don't plan to publish
> them unless there is general interest in it. It's "vendor specific" so 
> applications and means of control can
> vary...
>
> Br,
> Wojtek
>
> diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
> index 4b1319b..ac58a1b 100644
> --- a/net/mac80211/tx.c
> +++ b/net/mac80211/tx.c
> @@ -1465,6 +1465,7 @@ void ieee80211_xmit(struct ieee80211_sub_if_data 
> *sdata, struct sk_buff *skb)
>      struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
>      int headroom;
>      bool may_encrypt;
> +    u8 *pos;
>
>      rcu_read_lock();
>
> @@ -1485,6 +1486,32 @@ void ieee80211_xmit(struct 
> ieee80211_sub_if_data *sdata, struct sk_buff *skb)
>      hdr = (struct ieee80211_hdr *) skb->data;
>      info->control.vif = &sdata->vif;
>
> +    /* Add vendor specific data to probe response (if present) */
> +    if (ieee80211_is_probe_resp(hdr->frame_control) &&
> +        !(info->control.vif->bss_conf.vendor_data_oui[0] == 0 &&
> +        info->control.vif->bss_conf.vendor_data_oui[1] == 0 &&
> +        info->control.vif->bss_conf.vendor_data_oui[2] == 0)) {
> +
> +            if (skb->end - skb->tail < 8)
> +                pskb_expand_head(skb, 0, 8, GFP_ATOMIC);
> +
> +            if (skb->end - skb->tail > 8) {
> +                pos = (u8 *) skb_put(skb, 8);
> +                *pos++ = WLAN_EID_VENDOR_SPECIFIC;
> +                *pos++ = 3 + 1 + 2; /* oui, type, data16 */
> +                memcpy(pos, info->control.vif->bss_conf.vendor_data_oui,
> +                        
> sizeof(info->control.vif->bss_conf.vendor_data_oui));
> +                pos += 
> sizeof(info->control.vif->bss_conf.vendor_data_oui);
> +                *pos++ = info->control.vif->bss_conf.vendor_data_type;
> +                memcpy(pos, 
> &info->control.vif->bss_conf.vendor_data_value,
> +                        
> sizeof(info->control.vif->bss_conf.vendor_data_value));
> +            } else {
> +                printk(KERN_DEBUG "%s: Unable to add vendor data to 
> probe response"
> +                                   " directed to %pM\n", sdata->name,
> +                                   hdr->addr1);
> +            }
> +    }
> +
>      if (ieee80211_vif_is_mesh(&sdata->vif) &&
>          ieee80211_is_data(hdr->frame_control) &&
>          !is_multicast_ether_addr(hdr->addr1) &&
>>
>> Thanks
>>
>> -- 
>> Best Regards,
>> Amith
>>
>>
>>
>> _______________________________________________
>> ath9k-devel mailing list
>> ath9k-devel at lists.ath9k.org
>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel

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[ath9k-devel] Set vendor specific element ID in probe request

[Amith Belur]

Hello Wojciech,

Have you modified ieee80211_bss_conf adding vendor_data_oui? I don't find
this.

On Mon, Jun 11, 2012 at 4:33 PM, Wojciech Dubowik <
Wojciech.Dubowik@neratec.com> wrote:

>  I have got confused myself. It should be probe request and not probe
> response.
> Mechanism is same but you need to modify ieee80211_probereq_get in tx.c
>
> Br,
> Wojtek
>
>  On 06/11/2012 01:07 PM, Amith Belur wrote:
>
> Help needed, newbie here. I am trying to find how to set vendor specific
> element id in probe request and I am not quite clear how to do this. Any
> pointers would be really helpful.
>
>
> I have used changes below to send vendor data in probe responses. It's in
> mac80211 so you can
> use it with other drivers as well i.e. mac80211_hwsim.
>
> vendor_data_oui is just debugfs entry but you might just get rid of this
> and add your own control.
> At the moment I am using 16-bit for data but you can send what you want.
> Just add your struct
> instead of vendor_data_value and change IE length.
>
> This is just part of my testing patchest and it hasn't been reviewed,
> cleaned, etc. I have also patch to send
> vendor data in beacons based on debugfs entries (fast) or through hostapd
> (slow). I don't plan to publish
> them unless there is general interest in it. It's "vendor specific" so
> applications and means of control can
> vary...
>
> Br,
> Wojtek
>
> diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
> index 4b1319b..ac58a1b 100644
> --- a/net/mac80211/tx.c
> +++ b/net/mac80211/tx.c
> @@ -1465,6 +1465,7 @@ void ieee80211_xmit(struct ieee80211_sub_if_data
> *sdata, struct sk_buff *skb)
>      struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
>      int headroom;
>      bool may_encrypt;
> +    u8 *pos;
>
>      rcu_read_lock();
>
> @@ -1485,6 +1486,32 @@ void ieee80211_xmit(struct ieee80211_sub_if_data
> *sdata, struct sk_buff *skb)
>      hdr = (struct ieee80211_hdr *) skb->data;
>      info->control.vif = &sdata->vif;
>
> +    /* Add vendor specific data to probe response (if present) */
> +    if (ieee80211_is_probe_resp(hdr->frame_control) &&
> +        !(info->control.vif->bss_conf.vendor_data_oui[0] == 0 &&
> +        info->control.vif->bss_conf.vendor_data_oui[1] == 0 &&
> +        info->control.vif->bss_conf.vendor_data_oui[2] == 0)) {
> +
> +            if (skb->end - skb->tail < 8)
> +                pskb_expand_head(skb, 0, 8, GFP_ATOMIC);
> +
> +            if (skb->end - skb->tail > 8) {
> +                pos = (u8 *) skb_put(skb, 8);
> +                *pos++ = WLAN_EID_VENDOR_SPECIFIC;
> +                *pos++ = 3 + 1 + 2; /* oui, type, data16 */
> +                memcpy(pos, info->control.vif->bss_conf.vendor_data_oui,
> +
> sizeof(info->control.vif->bss_conf.vendor_data_oui));
> +                pos +=
> sizeof(info->control.vif->bss_conf.vendor_data_oui);
> +                *pos++ = info->control.vif->bss_conf.vendor_data_type;
> +                memcpy(pos,
> &info->control.vif->bss_conf.vendor_data_value,
> +
> sizeof(info->control.vif->bss_conf.vendor_data_value));
> +            } else {
> +                printk(KERN_DEBUG "%s: Unable to add vendor data to probe
> response"
> +                                   " directed to %pM\n", sdata->name,
> +                                   hdr->addr1);
> +            }
> +    }
> +
>      if (ieee80211_vif_is_mesh(&sdata->vif) &&
>          ieee80211_is_data(hdr->frame_control) &&
>          !is_multicast_ether_addr(hdr->addr1) &&
>
>
>  Thanks
>
>  --
> Best Regards,
> Amith
>
>
>
> _______________________________________________
> ath9k-devel mailing listath9k-devel at lists.ath9k.orghttps://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>
>
> _______________________________________________
> ath9k-devel mailing listath9k-devel at lists.ath9k.orghttps://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>


-- 
Best Regards,
Amith
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[ath9k-devel] Set vendor specific element ID in probe request

[Amith Belur]

Sorry for the oversight. I missed the initial part of the reply!

On Sun, Jun 17, 2012 at 9:51 PM, Amith Belur <amithbn@gmail.com> wrote:

> Hello Wojciech,
>
> Have you modified ieee80211_bss_conf adding vendor_data_oui? I don't find
> this.
>
> On Mon, Jun 11, 2012 at 4:33 PM, Wojciech Dubowik <
> Wojciech.Dubowik at neratec.com> wrote:
>
>>  I have got confused myself. It should be probe request and not probe
>> response.
>> Mechanism is same but you need to modify ieee80211_probereq_get in tx.c
>>
>> Br,
>> Wojtek
>>
>>  On 06/11/2012 01:07 PM, Amith Belur wrote:
>>
>> Help needed, newbie here. I am trying to find how to set vendor specific
>> element id in probe request and I am not quite clear how to do this. Any
>> pointers would be really helpful.
>>
>>
>> I have used changes below to send vendor data in probe responses. It's in
>> mac80211 so you can
>> use it with other drivers as well i.e. mac80211_hwsim.
>>
>> vendor_data_oui is just debugfs entry but you might just get rid of this
>> and add your own control.
>> At the moment I am using 16-bit for data but you can send what you want.
>> Just add your struct
>> instead of vendor_data_value and change IE length.
>>
>> This is just part of my testing patchest and it hasn't been reviewed,
>> cleaned, etc. I have also patch to send
>> vendor data in beacons based on debugfs entries (fast) or through hostapd
>> (slow). I don't plan to publish
>> them unless there is general interest in it. It's "vendor specific" so
>> applications and means of control can
>> vary...
>>
>> Br,
>> Wojtek
>>
>> diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
>> index 4b1319b..ac58a1b 100644
>> --- a/net/mac80211/tx.c
>> +++ b/net/mac80211/tx.c
>> @@ -1465,6 +1465,7 @@ void ieee80211_xmit(struct ieee80211_sub_if_data
>> *sdata, struct sk_buff *skb)
>>      struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
>>      int headroom;
>>      bool may_encrypt;
>> +    u8 *pos;
>>
>>      rcu_read_lock();
>>
>> @@ -1485,6 +1486,32 @@ void ieee80211_xmit(struct ieee80211_sub_if_data
>> *sdata, struct sk_buff *skb)
>>      hdr = (struct ieee80211_hdr *) skb->data;
>>      info->control.vif = &sdata->vif;
>>
>> +    /* Add vendor specific data to probe response (if present) */
>> +    if (ieee80211_is_probe_resp(hdr->frame_control) &&
>> +        !(info->control.vif->bss_conf.vendor_data_oui[0] == 0 &&
>> +        info->control.vif->bss_conf.vendor_data_oui[1] == 0 &&
>> +        info->control.vif->bss_conf.vendor_data_oui[2] == 0)) {
>> +
>> +            if (skb->end - skb->tail < 8)
>> +                pskb_expand_head(skb, 0, 8, GFP_ATOMIC);
>> +
>> +            if (skb->end - skb->tail > 8) {
>> +                pos = (u8 *) skb_put(skb, 8);
>> +                *pos++ = WLAN_EID_VENDOR_SPECIFIC;
>> +                *pos++ = 3 + 1 + 2; /* oui, type, data16 */
>> +                memcpy(pos, info->control.vif->bss_conf.vendor_data_oui,
>> +
>> sizeof(info->control.vif->bss_conf.vendor_data_oui));
>> +                pos +=
>> sizeof(info->control.vif->bss_conf.vendor_data_oui);
>> +                *pos++ = info->control.vif->bss_conf.vendor_data_type;
>> +                memcpy(pos,
>> &info->control.vif->bss_conf.vendor_data_value,
>> +
>> sizeof(info->control.vif->bss_conf.vendor_data_value));
>> +            } else {
>> +                printk(KERN_DEBUG "%s: Unable to add vendor data to
>> probe response"
>> +                                   " directed to %pM\n", sdata->name,
>> +                                   hdr->addr1);
>> +            }
>> +    }
>> +
>>      if (ieee80211_vif_is_mesh(&sdata->vif) &&
>>          ieee80211_is_data(hdr->frame_control) &&
>>          !is_multicast_ether_addr(hdr->addr1) &&
>>
>>
>>  Thanks
>>
>>  --
>> Best Regards,
>> Amith
>>
>>
>>
>> _______________________________________________
>> ath9k-devel mailing listath9k-devel at lists.ath9k.orghttps://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>
>>
>>
>>
>> _______________________________________________
>> ath9k-devel mailing listath9k-devel at lists.ath9k.orghttps://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>
>>
>>
>
>
> --
> Best Regards,
> Amith
>
>


-- 
Best Regards,
Amith
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