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Full Discussion: FreeBSD - Wireles Ad-hoc Networking with IP alias
Operating Systems BSD FreeBSD - Wireles Ad-hoc Networking with IP alias Post 302531548 by Govindaraj on Friday 17th of June 2011 06:52:56 AM
Old 06-17-2011
FreeBSD - Wireles Ad-hoc Networking with IP alias
Hello Friends,
I'm a newbie to FreeBSD. Trying to implement a IEEE paper : Energy consumption models for ad-hoc terminals (Computers).

The test setup with 3 Computers & Wireless NIC goes as follows:

Transmitter (A) --------------- Forwarder (B) -------------- Receiver (C)
10.0.1.1/24 ------- 10.0.1.2/24 (10.0.2.2/24) ---------- 10.0.2.1/24

Here Laptop B acts as a forwarder. It has 1 wireless NIC. I use ip alias to create a virtual NIC to forward the data to receiver. But the Laptop B is not forwarding the packet.

My /etc.rc.conf file is as follows:

Laptop A (Transmitter):

Code:
wlans_ath0="wlan0"
create_args_wlan0="wlanmode adhoc"
ifconfig_wlan0="inet 10.0.1.1 netmask 255.255.255.0 ssid energy"

Laptop B (Forwarder):

Code:
wlans_ath0="wlan0"
create_args_wlan0="wlanmode adhoc"
ifconfig_wlan0="inet 10.0.1.1 netmask 255.255.255.0 ssid energy"
ifconfig_wlan0_alias0="inet 10.0.2.2  netmask 255.255.255.0 ssid energy"


Laptop C (Receiver):

Code:
wlans_ath0="wlan0"
create_args_wlan0="wlanmode adhoc"
ifconfig_wlan0="inet 10.0.2.1 netmask 255.255.255.0 ssid energy"

Can some one help me, why the Laptop B is not forwarding the packets? Thanks in advance.
Last edited by pludi; 06-17-2011 at 07:58 AM..
 

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LEARN ABOUT OPENSOLARIS

pcan

pcan(7D)							      Devices								  pcan(7D)

NAME

       pcan - Cisco Aironet 802.11b wireless NIC driver

DESCRIPTION

       The  pcan  wireless  NIC driver is a multi-threaded, loadable, clonable, GLDv3-based STREAMS driver. It supports the pccard and PCI/MiniPCI
       cards with the Cisco Aironet 802.11b chipset. For pccard, the driver works in both SPARC and x86  (32-bit/64-bit)  modes.  For  PCI/MiniPCI
       card, the driver works in 32-bit x86 mode only.

DRIVER CONFIGURATION

       The pcan driver supports 802.11b data rates of 1, 2, 5.5 and 11 (Mbits/sec). The default is 11.

       The  pcan  driver  supports  BSS  networks (also known as "ap" or "infrastructure" networks) and IBSS networks (also known as "ad-hoc" net-
       works). For authentication type, the pcan driver supports the "open" (or "open-system") mode. For encryption type, only	WEP  is  currently
       supported. You perform configuration and administration tasks using the dladm(1M) and wificonfig(1M) utilities.

FILES

       /dev/pcan*		   Special character device.

       /kernel/drv/pcan 	   32-bit ELF kernel module (x86).

       /kernel/drv/amd64/pcan	   64-bit ELF kernel module (x86).

       /kernel/drv/sparcv9/pcan    64-bit ELF kernel module (SPARC).

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SPARC, x86		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dladm(1M), wificonfig(1M), attributes(5), gld(7D)

       802.11b Standard for Wireless Local Area Networks (WLANs) - IEEE

SunOS 5.11							    24 Jan 2007 							  pcan(7D)
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