I wonder if someone could help me debug a wifi (non)connection?  ifconfig
and wiconfig seem to say wi0 is working, but tcpdump shows no traffic and
the client can't see it.  

The NetBSD end is meant to be an access point:

$ dmesg | grep wi0
wi0 at pci0 dev 14 function 0: Intersil Prism2.5 Wireless Lan
wi0: interrupting at irq 5
wi0: 802.11 address 00:60:b3:6d:8c:c6
wi0: using RF:PRISM2.5 MAC:ISL3874A(Mini-PCI)
wi0: Intersil Firmware: Primary (1.1.1), Station (1.8.0)
wi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps

The other end is an iBook running OS X.  It reports no signal (even only a
few feet away) although it works in other wireless environments with no
problem.  My understanding is that both the Mac Airport card and the
Intersil are 802.11b.  

NetBSD's tcpdump reports no packets between the interfaces, although the
iBook sees my neighbors' packets.  

Status output follows.  How can I figure out which end is broken?  

Many thanks for any advice.  

--jkl


Here's the status of wi0:

$ ifconfig wi0
wi0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu
1500
        ssid forest nwkey *****
        powersave off
        bssid 00:60:b3:6d:8c:c6 chan 3
        address: 00:60:b3:6d:8c:c6
        media: IEEE802.11 autoselect hostap (DS2 hostap)
        status: active
        inet 192.168.2.254 netmask 0xffffff00 broadcast 192.168.2.255

and the wiconfig output: 

NIC serial number:			[ 99SA01000000 ]
Station name:				[  ]
SSID for IBSS creation:			[ forest ]
Current netname (SSID):			[ forest ]
Desired netname (SSID):			[ forest ]
Current BSSID:				[ 00:60:b3:6d:8c:c6 ]
Channel list:				[ 1 2 3 4 5 6 7 8 9 10 11 ]
IBSS channel:				[ 3 ]
Current channel:			[ 3 ]
Comms quality/signal/noise:		[ 0 81 27 ]
Promiscuous mode:			[ Off ]
Port type:				[ 6 ]
MAC address:				[ 00:60:b3:6d:8c:c6 ]
TX rate (selection):			[ 0 ]
TX rate (actual speed):			[ 2 ]
Beacon Interval (current) [msec]:	[ 100 ]
Maximum data length:			[ 2304 ]
RTS/CTS handshake threshold:		[ 2347 ]
fragmentation threshold:		[ 2346 ]
RSSI -> dBm adjustment:			[ 100 ]
Create IBSS:				[ Off ]
Microwave oven robustness:		[ 0 ]
Roaming mode(1:firm,3:disable):		[ 1 ]
Access point density:			[ 1 ]
Power Mgmt (1=on, 0=off):		[ 0 ]
Max sleep time (msec):			[ 100 ]
Vendor info:				[ Unknown ID: 31 version: 1.8 ]
WEP encryption:				[ On ]
Authentication type 
(1=OpenSys, 2=Shared Key):		[ 1 ]
TX encryption key:			[ 1 ]
Encryption keys:			[  ][  ][  ][  ]