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# Compiling and using libpcap on Haiku
Haiku R1/beta4 and earlier versions do not support packet capture on the
loopback interface. Using this version of libpcap, loopback capture works
since Haiku revision hrev57585, including Haiku R1/beta5 and later versions.
Packet timestamping and filtering always occur in userland. Wireless monitor
mode is not supported. The "any" pseudo-interface is not supported.
[**pcap_set_buffer_size**](https://www.tcpdump.org/manpages/pcap_set_buffer_size.3pcap.html)(3PCAP)
has no effect.
[**pcap_setdirection**](https://www.tcpdump.org/manpages/pcap_setdirection.3pcap.html)(3PCAP)
is not supported.
[**pcap_inject**](https://www.tcpdump.org/manpages/pcap_inject.3pcap.html)(3PCAP)
is not supported.
The statistics reported by
[**pcap_stats**](https://www.tcpdump.org/manpages/pcap_stats.3pcap.html)(3PCAP)
on Haiku are as follows:
* `ps_recv` is the number of packets successfully delivered by the kernel,
before libpcap applies a filter.
* `ps_drop` is the number of packets rejected by the filter.
* `ps_ifdrop` is the number of packets dropped by the network interface (as
seen via `SIOCGIFSTATS`) since the capture handle became active.
## 64-bit x86 R1/beta5
* Autoconf 2.72 works.
* CMake 4.1.4 works.
* GCC 13.3.0 works.
* Clang 21.1.8
* flex 2.6.4 works.
* GNU Bison 3.8.2 works.
The following command will install respective non-default packages:
```
pkgman install cmake llvm21_clang
```
For reference, the tests were done using a system installed from
`haiku-r1beta5-x86_64-anyboot.iso`.
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