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4 Commits

Author SHA1 Message Date
rpaulo f20c174719 Place the sysctl code under an if block and print an error message if the 
user tries to fetch information via kvm.

Discussed with Elad Efrat.
 2005-09-02 22:52:24 +00:00
rpaulo d65009381e Request process information using sysctl(3) and not kvm(3) since bpf(4) 
statistics and peers are only available using the former.
 2005-09-02 22:23:13 +00:00
elad 8920c39bb8 Fix printing formats. 2005-08-05 12:16:51 +00:00
rpaulo 66daeed445 Implemented the userland part of the BPF statistics and BPF peers, 
net.bpf.stats and net.bpf.peers sysctls respectively. netstat(1) now
has an additional syntax:
	netstat [-s] [-B] [-I Interface]

Only the super user can see a list of BPF peers with the following command:
# netstat -B
Active BPF peers
PID     Int     Recv     Drop     Capt     Flags  Bufsize  Comm
4941    lo0     0        0        0        I--S-  262144   tcpdump
252     ex0     19668    0        5        I-RS-  32768    dhclient

And every user can see the BPF statistics with:
$ netstat -s -B
bpf:
        19669 total packets received
        5 total packets captured
        0 total packets dropped

This idea came from FreeBSD (Christian S.J. Peron) but, currently, they
doen't have a userland utility in the base system to read the sysctls.

Reviewed by: christos@
 2005-08-04 19:39:40 +00:00