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- Fix prototype of bpf_filter().

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- Document what passing it a zero buflen argument means.
This commit is contained in:
Ruslan Ermilov 2006-12-13 06:27:20 +00:00
parent 0c59c145ed
commit ea0e76a28d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165153
1 changed files with 8 additions and 2 deletions
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10
share/man/man9/bpf.9
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd May 19, 2004
.Dd December 13, 2006
.Dt BPF 9
.Os
.\"
@ -51,7 +51,7 @@
.Fn bpf_mtap2 "struct bpf_if *bp" "void *data" "u_int dlen" "struct mbuf *m"
.Ft u_int
.Fo bpf_filter
.Fa "const struct bpf_insn *pc " "u_char *pkt" "u_int *wirelen" "u_int *buflen"
.Fa "const struct bpf_insn *pc " "u_char *pkt" "u_int wirelen" "u_int buflen"
.Fc
.Ft int
.Fn bpf_validate "const struct bpf_insn *fcode" "int flen"
@ -217,6 +217,12 @@ argument
is the length of the original packet and
.Fa buflen
is the amount of data present.
The
.Fa buflen
value of 0 is special; it indicates that the
.Fa pkt
is actually a pointer to an mbuf chain
.Pq Vt "struct mbuf *" .
.Pp
The
.Fn bpf_validate