get empty file result

[guiyang882]

Hi,
Assistant ! Your tools may have some question.
After run tcpdump i get the .pcap file, but run your tcp_tool , I get empy file.
After run the command tcpdum -r all.pcap host *** and port ****
I get this info:
16:20:26.525740 IP 10.211.5.35.10231 > 182.254.99.101.http-alt: Flags [.], ack 351165708, win 196, options [nop,nop,TS val 34166115 ecr
2640974628], length 0
16:20:26.815158 IP 10.211.5.35.10231 > 182.254.99.101.http-alt: Flags [P.], seq 0:195, ack 1, win 196, options [nop,nop,TS val 34166143
ecr 2640974628], length 195
16:20:27.445649 IP 10.211.5.35.10231 > 182.254.99.101.http-alt: Flags [.], ack 669, win 206, options [nop,nop,TS val 34166207 ecr 26409
74854], length 0
16:20:27.653509 IP 10.211.5.35.10231 > 182.254.99.101.http-alt: Flags [P.], seq 195:390, ack 669, win 206, options [nop,nop,TS val 3416
6227 ecr 2640974854], length 195
16:20:40.654547 IP 10.211.5.35.10231 > 182.254.99.101.http-alt: Flags [.], ack 1417, win 218, options [nop,nop,TS val 34167528 ecr 2640
978146], length 0
.....
would you mean we can use some tools to get the homework info !

student at UCAS