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I've capture a pcap file and display it on wireshark. I want to analysis those udp packets with 'Length' column equals to 443.
On wireshark, I try to found what's the proper filter.
udp && length 443 # invalid usage udp && eth.len == 443 # wrong result udp && ip.len == 443 # wrong result By the way, could the wireshark's filter directly apply on libpcap's filter?
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The packet length (aka the field named frame. len ) is the size of the frame as seen "on the wire".
Sure, just go to Statistics -> Packet Length for a statistics on packet length in the current trace. You can just leave the filter setting empty if you want the values for the complete file. There is also the capinfos tool. That gives average packet size and bit/byte/packet rates among other stats.
from the main menu. Display filters can be created or edited by selecting Manage Display Filters from the display filter bookmark menu or Analyze → Display Filters… from the main menu. Wireshark will open the corresponding dialog as shown in Figure 6.10, “The “Capture Filters” and “Display Filters” dialog boxes”.
To add a packet length column, navigate to Edit > Preferences and select User Interface > Columns. Click New, and define the column's title. From the Format list, select Packet length (bytes). Use the up and down arrows to position the column in the list.
All these work on Wireshark's filter
frame.len==243 <- I use this ip.len==229 udp.length==209 data.len==201 If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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