Hi,

I have been trying to implement a logic in follwong file where we start to read from Frame 196 to Frame 197 in a file. If we found Frame 197 we should stop and search for a required pattern. If we found that pattern then we should exit from loop.If we are not able to find a pattern then in next iteration we should be reading from Frame 197 to Frame 198 not from start of a file.Please help me out on this issue.


Frame 196 (14 bytes on wire, 14 bytes captured)
Arrival Time: Apr 9, 2009 16:19:07.918481826
Time delta from previous packet: 0.000316620 seconds
Time since reference or first frame: 29.761285782 seconds
Frame Number: 196
Packet Length: 14 bytes
Capture Length: 14 bytes
Protocols in frame: wlan
IEEE 802.11
Data Rate: 1.0 Mb/s
Channel: 11
Signal Strength: 74%
Type/Subtype: Acknowledgement (29)
Frame Control: 0x00D4 (Normal)
Version: 0
Type: Control frame (1)
Subtype: 13
Flags: 0x0
DS status: Not leaving DS or network is operating in AD-HOC mode (To DS: 0 From DS: 0) (0x00)
.... .0.. = More Fragments: This is the last fragment
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..0. .... = More Data: No data buffered
.0.. .... = Protected flag: Data is not protected
0... .... = Order flag: Not strictly ordered
Duration: 0
Receiver address: Broadcom_90:2c:b3 (00:10:18:90:2c:b3)
Frame check sequence: 0xdf9e77d6 [correct]

Frame 197 (42 bytes on wire, 42 bytes captured)
Arrival Time: Apr 9, 2009 16:19:07.919038772
Time delta from previous packet: 0.000556946 seconds
Time since reference or first frame: 29.761842728 seconds
Frame Number: 197
Packet Length: 42 bytes
Capture Length: 42 bytes
Protocols in frame: wlan
IEEE 802.11
Data Rate: 1.0 Mb/s
Channel: 11
Signal Strength: 77%
Type/Subtype: Authentication (11)
Frame Control: 0x00B0 (Normal)
Version: 0
Type: Management frame (0)
Subtype: 11
Flags: 0x0
DS status: Not leaving DS or network is operating in AD-HOC mode (To DS: 0 From DS: 0) (0x00)
.... .0.. = More Fragments: This is the last fragment
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..0. .... = More Data: No data buffered
.0.. .... = Protected flag: Data is not protected
0... .... = Order flag: Not strictly ordered
Duration: 314
Destination address: MarvellS_28:31:7b (00:50:43:28:31:7b)
Source address: Broadcom_90:2c:b3 (00:10:18:90:2c:b3)
BSS Id: Broadcom_90:2c:b3 (00:10:18:90:2c:b3)
Fragment number: 0
Sequence number: 1758
Frame check sequence: 0x0ae7be18 [correct]
IEEE 802.11 wireless LAN management frame
Fixed parameters (6 bytes)
Authentication Algorithm: Open System (0)
Authentication SEQ: 0x0002
Status code: Successful (0x0000)
Tagged parameters (8 bytes)
Vendor Specific: Broadcom
Tag Number: 221 (Vendor Specific)
Tag length: 6
Vendor: Broadcom
Tag interpretation: Not interpreted