Compatible compilation error of ff_netstat.
Update sockbuf.hcopy from file "freebsd/sys/sockbuf.h"
Update socketvar.hcopy from file "freebsd/sys/socketvar.h"
ff tools upgrade to support FreeBSD 13.0.
Update LICENCE.
FreeBSD: Upgrade to FreeBSD-releng-13.0 compiled, to be tested.
Support DPDK 20.11.0(LTS).
Fix some issues of ff msg.
The `ff_traffic` and `ff_top`'s `-P` argument support bigger than 38.
Fix bug of ff_ipc_msg_free in ff tools.The ff msg shouldn't to free while `ff_ipc_send` success but `ff_ipc_recv` failed (such as F-Stack app are breaking by gdb).
Fix bug of `sysctl` in tools/compat/sysctl.c.The ff msg shouldn't to free while `ff_ipc_send` success but `ff_ipc_recv` failed (such as F-Stack app are breaking by gdb).
Add doc of `ndp` tool.
feature: add ndp tool for ipv6 neighbor
Add ff_ipc_exit() to clean temp files in /var/ while run F-Stack tools netstat/ngctl/sysctl/top/traffic/knictl.
Add ff_ipc_exit() to clean temp files in /var/ while run F-Stack tools arp/ifconfig/route/ipfw.
IPFW: supported IPv6.
modify `knistl` to `ff_knictl` while install tools, so it can be uninstall.
#add knictl support
Fix a crash bug while use `ff_ifconfig` to get interface list of bridge.
Fix crash of `netstat -n`, refer #438.
Update iflagg.cPresumably a typo
Update tools/README.md for traffic.
Tools: traffic tool support display all traffic of multi-processes.
Tools: update top.
Tools: top tool support display all cpu usage of multi-processes.
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