diff options
| author | Jan Engelhardt <jengelh@inai.de> | 2023-10-24 14:58:06 +0200 |
|---|---|---|
| committer | Phil Sutter <phil@nwl.cc> | 2023-10-27 18:00:30 +0200 |
| commit | b7d45c140fde9366a34412dbd318dd7c84bbef14 (patch) | |
| tree | 45e43ef8d3fb0503d221a90e4f6bdcac17e53071 /extensions/libxt_bpf.man | |
| parent | 458e167e9510f995111d32aa7a30b7c7d2af2e75 (diff) | |
man: encode minushyphen the way groff/man requires it
Sparked by a recent LWN article[1], sweeps over the iptables manpages
for incorrectly encoded dashes was made by Phil Sutter and myself.
An ASCII minushyphen in the source manpage translates to a hyphen in
output, so one has to use the sequence "\-" to get a minushyphen in
the output, as groff_char(7) explains.
[1] https://lwn.net/Articles/947941/ (paywalled until about 2023-11-06)
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Phil Sutter <phil@nwl.cc>
Diffstat (limited to 'extensions/libxt_bpf.man')
| -rw-r--r-- | extensions/libxt_bpf.man | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/extensions/libxt_bpf.man b/extensions/libxt_bpf.man index d6da2043..b79c21db 100644 --- a/extensions/libxt_bpf.man +++ b/extensions/libxt_bpf.man @@ -28,7 +28,7 @@ without the comments or trailing whitespace: .IP 4 # number of instructions .br -48 0 0 9 # load byte ip->proto +48 0 0 9 # load byte ip\->proto .br 21 0 1 6 # jump equal IPPROTO_TCP .br @@ -44,7 +44,7 @@ Or instead, you can invoke the nfbpf_compile utility. .IP iptables \-A OUTPUT \-m bpf \-\-bytecode "`nfbpf_compile RAW 'ip proto 6'`" \-j ACCEPT .PP -Or use tcpdump -ddd. In that case, generate BPF targeting a device with the +Or use tcpdump \-ddd. In that case, generate BPF targeting a device with the same data link type as the xtables match. Iptables passes packets from the network layer up, without mac layer. Select a device with data link type RAW, such as a tun device: @@ -53,8 +53,8 @@ ip tuntap add tun0 mode tun .br ip link set tun0 up .br -tcpdump -ddd -i tun0 ip proto 6 +tcpdump \-ddd \-i tun0 ip proto 6 .PP -See tcpdump -L -i $dev for a list of known data link types for a given device. +See tcpdump \-L \-i $dev for a list of known data link types for a given device. .PP You may want to learn more about BPF from FreeBSD's bpf(4) manpage. |