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sniffer capture network packet supoort x64 on win7

License: GNU Lesser General Public License v2.1

HTML 85.87% Java 1.61% C 11.50% C++ 0.27% Makefile 0.11% CSS 0.43% NSIS 0.21%

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jpcap-x64's Issues

Issue while decoding fragmentation flags in IP packet decoding

Hello,

The issue is located in src/c/packet_ip.c lines 50 to 52 where fragmentation flags (Don't fragment and More fragment flags) are not processed properly.
A call to C ntohs() function shall be used:

  • (jboolean)(((ntohs(ip_pkt->ip_off)&IP_RF)>0)?JNI_TRUE:JNI_FALSE),
  • (jboolean)((((ntohs(ip_pkt->ip_off)) &IP_DF)>0)?JNI_TRUE:JNI_FALSE),
  • (jboolean)(((ntohs(ip_pkt->ip_off) &IP_MF)>0)?JNI_TRUE:JNI_FALSE),

This fixed was tested on both Win10 & Linux Ubuntu 18.04 TLS

In addition, I also replace line 44:

  • (jbyte)ip_pkt->ip_v

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