--- /dev/null
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+inherit flag-o-matic toolchain-funcs user
+
+DESCRIPTION="A Tool for network monitoring and data acquisition"
+HOMEPAGE="http://www.tcpdump.org/"
+SRC_URI="http://www.tcpdump.org/release/${P}.tar.gz
+ http://www.jp.tcpdump.org/release/${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~x86-fbsd ~x86-freebsd ~amd64-linux ~arm-linux ~x86-linux"
+IUSE="+drop-root libressl smi ssl ipv6 samba suid test"
+
+RDEPEND="
+ drop-root? ( sys-libs/libcap-ng )
+ net-libs/libpcap
+ smi? ( net-libs/libsmi )
+ ssl? (
+ !libressl? ( >=dev-libs/openssl-0.9.6m:0 )
+ libressl? ( dev-libs/libressl )
+ )
+"
+DEPEND="
+ ${RDEPEND}
+ drop-root? ( virtual/pkgconfig )
+ test? (
+ || ( app-arch/sharutils sys-freebsd/freebsd-ubin )
+ dev-lang/perl
+ )
+"
+
+pkg_setup() {
+ if use drop-root || use suid; then
+ enewgroup tcpdump
+ enewuser tcpdump -1 -1 -1 tcpdump
+ fi
+}
+
+src_configure() {
+ # tcpdump needs some optimization. see bug #108391
+ # but do not replace -Os
+ filter-flags -O[0-9]
+ has -O? ${CFLAGS} || append-cflags -O2
+
+ filter-flags -finline-functions
+
+ if use drop-root; then
+ append-cppflags -DHAVE_CAP_NG_H
+ export LIBS=$( $(tc-getPKG_CONFIG) --libs libcap-ng )
+ fi
+
+ econf \
+ $(use_enable ipv6) \
+ $(use_enable samba smb) \
+ $(use_with drop-root chroot '') \
+ $(use_with smi) \
+ $(use_with ssl crypto "${EPREFIX}/usr") \
+ $(usex drop-root "--with-user=tcpdump" "")
+}
+
+src_test() {
+ if [[ ${EUID} -ne 0 ]] || ! use drop-root; then
+ sed -i -e '/^\(espudp1\|eapon1\)/d;' tests/TESTLIST || die
+ emake check
+ else
+ ewarn "If you want to run the test suite, make sure you either"
+ ewarn "set FEATURES=userpriv or set USE=-drop-root"
+ fi
+}
+
+src_install() {
+ dosbin tcpdump
+ doman tcpdump.1
+ dodoc *.awk
+ dodoc CHANGES CREDITS README.md
+
+ if use suid; then
+ fowners root:tcpdump /usr/sbin/tcpdump
+ fperms 4110 /usr/sbin/tcpdump
+ fi
+}
+
+pkg_preinst() {
+ if use drop-root || use suid; then
+ enewgroup tcpdump
+ enewuser tcpdump -1 -1 -1 tcpdump
+ fi
+}
+
+pkg_postinst() {
+ use suid && elog "To let normal users run tcpdump add them into tcpdump group."
+}