net-misc/dhcpcd: backport rebinding fix

Closes: https://bugs.gentoo.org/920652
Signed-off-by: Sam James <sam@gentoo.org>
This commit is contained in:
Sam James
2023-12-28 04:14:09 +00:00
parent 49fc4a8567
commit ae217d6b14
2 changed files with 215 additions and 0 deletions

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@@ -0,0 +1,169 @@
# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
inherit systemd toolchain-funcs
if [[ ${PV} == 9999 ]]; then
inherit git-r3
EGIT_REPO_URI="https://github.com/NetworkConfiguration/dhcpcd.git"
else
MY_P="${P/_alpha/-alpha}"
MY_P="${MY_P/_beta/-beta}"
MY_P="${MY_P/_rc/-rc}"
SRC_URI="https://github.com/NetworkConfiguration/dhcpcd/releases/download/v${PV}/${MY_P}.tar.xz"
S="${WORKDIR}/${MY_P}"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux"
fi
DESCRIPTION="A fully featured, yet light weight RFC2131 compliant DHCP client"
HOMEPAGE="https://github.com/NetworkConfiguration/dhcpcd/ https://roy.marples.name/projects/dhcpcd/"
LICENSE="BSD-2 BSD ISC MIT"
SLOT="0"
IUSE="debug +embedded ipv6 privsep +udev"
DEPEND="udev? ( virtual/udev )"
RDEPEND="
${DEPEND}
privsep? (
acct-group/dhcpcd
acct-user/dhcpcd
)
"
QA_CONFIG_IMPL_DECL_SKIP=(
# These don't exist on Linux/glibc (bug #900264)
memset_explicit
memset_s
setproctitle
strtoi
consttime_memequal
SHA256_Init
hmac
)
PATCHES=(
"${FILESDIR}"/${PN}-10.0.6-rebinding.patch
)
src_configure() {
local myeconfargs=(
--dbdir="${EPREFIX}/var/lib/dhcpcd"
--libexecdir="${EPREFIX}/lib/dhcpcd"
--localstatedir="${EPREFIX}/var"
--prefix="${EPREFIX}"
--with-hook=ntp.conf
$(use_enable debug)
$(use_enable embedded)
$(use_enable ipv6)
$(use_enable privsep)
$(usex elibc_glibc '--with-hook=yp.conf' '')
--rundir=$(usex kernel_linux "${EPREFIX}/run/dhcpcd" "${EPREFIX}/var/run/dhcpcd")
$(usex privsep '--privsepuser=dhcpcd' '')
$(usex udev '' '--without-dev --without-udev')
CC="$(tc-getCC)"
)
econf "${myeconfargs[@]}"
}
src_install() {
default
keepdir /var/lib/dhcpcd
newinitd "${FILESDIR}"/dhcpcd.initd-r1 dhcpcd
systemd_newunit "${FILESDIR}"/dhcpcd.service-r1 dhcpcd.service
}
pkg_postinst() {
local dbdir="${EROOT}"/var/lib/dhcpcd old_files=()
local old_old_duid="${EROOT}"/var/lib/dhcpcd/dhcpcd.duid
local old_duid="${EROOT}"/etc/dhcpcd.duid
local new_duid="${dbdir}"/duid
if [[ -e "${old_old_duid}" ]] ; then
# Upgrade the duid file to the new format if needed
if ! grep -q '..:..:..:..:..:..' "${old_old_duid}"; then
sed -i -e 's/\(..\)/\1:/g; s/:$//g' "${old_old_duid}"
fi
# Move the duid to /etc, a more sensible location
if [[ ! -e "${old_duid}" ]] ; then
cp -p "${old_old_duid}" "${new_duid}"
fi
old_files+=( "${old_old_duid}" )
fi
# dhcpcd-7 moves the files out of /etc
if [[ -e "${old_duid}" ]] ; then
if [[ ! -e "${new_duid}" ]] ; then
cp -p "${old_duid}" "${new_duid}"
fi
old_files+=( "${old_duid}" )
fi
local old_secret="${EROOT}"/etc/dhcpcd.secret
local new_secret="${dbdir}"/secret
if [[ -e "${old_secret}" ]] ; then
if [[ ! -e "${new_secret}" ]] ; then
cp -p "${old_secret}" "${new_secret}"
fi
old_files+=( "${old_secret}" )
fi
# dhcpcd-7 renames some files in /var/lib/dhcpcd
local old_rdm="${dbdir}"/dhcpcd-rdm.monotonic
local new_rdm="${dbdir}"/rdm_monotonic
if [[ -e "${old_rdm}" ]] ; then
if [[ ! -e "${new_rdm}" ]] ; then
cp -p "${old_rdm}" "${new_rdm}"
fi
old_files+=( "${old_rdm}" )
fi
local lease=
for lease in "${dbdir}"/dhcpcd-*.lease*; do
[[ -f "${lease}" ]] || continue
old_files+=( "${lease}" )
local new_lease=$(basename "${lease}" | sed -e "s/dhcpcd-//")
[[ -e "${dbdir}/${new_lease}" ]] && continue
cp "${lease}" "${dbdir}/${new_lease}"
done
# Warn about removing stale files
if [[ -n "${old_files[@]}" ]] ; then
elog
elog "dhcpcd-7 has copied dhcpcd.duid and dhcpcd.secret from"
elog "${EROOT}/etc to ${dbdir}"
elog "and copied leases in ${dbdir} to new files with the dhcpcd-"
elog "prefix dropped."
elog
elog "You should remove these files if you don't plan on reverting"
elog "to an older version:"
local old_file=
for old_file in ${old_files[@]}; do
elog " ${old_file}"
done
fi
if [ -z "${REPLACING_VERSIONS}" ]; then
elog
elog "dhcpcd has zeroconf support active by default."
elog "This means it will always obtain an IP address even if no"
elog "DHCP server can be contacted, which will break any existing"
elog "failover support you may have configured in your net configuration."
elog "This behaviour can be controlled with the noipv4ll configuration"
elog "file option or the -L command line switch."
elog "See the dhcpcd and dhcpcd.conf man pages for more details."
elog
elog "Dhcpcd has duid enabled by default, and this may cause issues"
elog "with some dhcp servers. For more information, see"
elog "https://bugs.gentoo.org/show_bug.cgi?id=477356"
fi
if ! has_version net-dns/bind-tools; then
elog
elog "If you activate the lookup-hostname hook to look up your hostname"
elog "using the dns, you need to install net-dns/bind-tools."
fi
}

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@@ -0,0 +1,46 @@
https://bugs.gentoo.org/920652#c2
https://github.com/NetworkConfiguration/dhcpcd/commit/8ab7ca1eb4e9bb797d6e6d955c83d8a82f69a663
From 8ab7ca1eb4e9bb797d6e6d955c83d8a82f69a663 Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Sun, 24 Dec 2023 12:07:25 +0000
Subject: [PATCH] DHCP: DECLINE address on ARP defend failure
Also, drop the lease.
This should get us a new address from the DHCP server when we
re-enter DISCOVER to avoid looping on the same address and fail
again.
---
src/dhcp.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/dhcp.c b/src/dhcp.c
index 014ce6cf..a58e1db2 100644
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -1944,7 +1944,11 @@ dhcp_expire(void *arg)
static void
dhcp_decline(struct interface *ifp)
{
+ struct dhcp_state *state = D_STATE(ifp);
+ // Set the expired state so we send over BPF as this could be
+ // an address defence failure.
+ state->added |= STATE_EXPIRED;
send_message(ifp, DHCP_DECLINE, NULL);
}
#endif
@@ -2098,8 +2102,12 @@ static void
dhcp_arp_defend_failed(struct arp_state *astate)
{
struct interface *ifp = astate->iface;
+ struct dhcp_state *state = D_STATE(ifp);
+ if (!(ifp->options->options & (DHCPCD_INFORM | DHCPCD_STATIC)))
+ dhcp_decline(ifp);
dhcp_drop(ifp, "EXPIRED");
+ dhcp_unlink(ifp->ctx, state->leasefile);
dhcp_start1(ifp);
}
#endif