iputils: Fix systemd and ipv6 detection

When systemd is enabled, ensure iputils detects it correctly. Split out
IPv6 only features based on ipv6 enabled in DISTRO_FEATURES.

(From OE-Core rev: e742e5f711d46b1664cc5bec2f788dc0e020ccaa)

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/iputils/iputils/0001-ninfod-fix-systemd-Documentation-url-error.patch

@@ -0,0 +1,28 @@
+From c1f1527eb30d4a5feebf9a0757582bbf7fe3eae9 Mon Sep 17 00:00:00 2001
+From: Andrea Stevanato <andrea.stevanato.95@hotmail.it>
+Date: Tue, 5 Nov 2019 19:08:30 +0000
+Subject: [PATCH] ninfod: fix systemd Documentation url error
+
+systemd[1]: /usr/lib/systemd/system/ninfod.service:3: Invalid URL, ignoring: ninfod(8)
+
+Upstream-Status: Backport [https://github.com/iputils/iputils/commit/c1f1527eb30d4a5feebf9a0757582bbf7fe3eae9]
+Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
+---
+ systemd/ninfod.service.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/systemd/ninfod.service.in b/systemd/ninfod.service.in
+index 5ab69ca00e96..8e79fcd9238e 100644
+--- a/systemd/ninfod.service.in
++++ b/systemd/ninfod.service.in
+@@ -1,6 +1,6 @@
+ [Unit]
+ Description=Respond to IPv6 Node Information Queries
+-Documentation=ninfod(8)
++Documentation=man:ninfod(8)
+ Requires=network.target
+ After=network.target
+ 
+-- 
+2.17.1
+

meta/recipes-extended/iputils/iputils/0001-rarpd-rdisc-Drop-PrivateUsers.patch

@@ -0,0 +1,46 @@
+From 6e51d529988cfc0bb357751fd767e9f1478e2b81 Mon Sep 17 00:00:00 2001
+From: Alex Kiernan <alex.kiernan@gmail.com>
+Date: Thu, 13 Feb 2020 06:08:45 +0000
+Subject: [PATCH] rarpd: rdisc: Drop PrivateUsers
+
+Neither rarpd nor rdisc can gain the necessary capabilities with
+PrivateUsers enabled.
+
+Upstream-Status: Pending
+Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
+---
+ systemd/rarpd.service.in | 1 -
+ systemd/rdisc.service.in | 3 ++-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/systemd/rarpd.service.in b/systemd/rarpd.service.in
+index e600c10c93e6..f5d7621a7ce8 100644
+--- a/systemd/rarpd.service.in
++++ b/systemd/rarpd.service.in
+@@ -12,7 +12,6 @@ AmbientCapabilities=CAP_NET_RAW
+ DynamicUser=yes
+ PrivateTmp=yes
+ PrivateDevices=yes
+-PrivateUsers=yes
+ ProtectSystem=strict
+ ProtectHome=yes
+ ProtectControlGroups=yes
+diff --git a/systemd/rdisc.service.in b/systemd/rdisc.service.in
+index 4e2a1ec9d0e5..a71b87d36b37 100644
+--- a/systemd/rdisc.service.in
++++ b/systemd/rdisc.service.in
+@@ -8,9 +8,10 @@ After=network.target
+ EnvironmentFile=-/etc/sysconfig/rdisc
+ ExecStart=@sbindir@/rdisc -f -t $OPTIONS $SEND_ADDRESS $RECEIVE_ADDRESS
+ 
++CapabilityBoundingSet=CAP_NET_RAW
+ AmbientCapabilities=CAP_NET_RAW
+ PrivateTmp=yes
+-PrivateUsers=yes
++DynamicUser=yes
+ ProtectSystem=strict
+ ProtectHome=yes
+ ProtectControlGroups=yes
+-- 
+2.17.1
+

meta/recipes-extended/iputils/iputils_s20190709.bb

@@ -12,6 +12,8 @@ DEPENDS = "gnutls"
 
 SRC_URI = "git://github.com/iputils/iputils \
            file://0001-ninfod-change-variable-name-to-avoid-colliding-with-.patch \
+           file://0001-ninfod-fix-systemd-Documentation-url-error.patch \
+           file://0001-rarpd-rdisc-Drop-PrivateUsers.patch \
            "
 SRCREV = "13e00847176aa23683d68fce1d17ffb523510946"
 
@@ -23,16 +25,20 @@ UPSTREAM_CHECK_GITTAGREGEX = "(?P<pver>s\d+)"
 # breaks the version order.
 CVE_CHECK_WHITELIST += "CVE-2000-1213 CVE-2000-1214"
 
-PACKAGECONFIG ??= "libcap libgcrypt rarpd traceroute6"
+PACKAGECONFIG ??= "libcap libgcrypt rarpd \
+                   ${@bb.utils.contains('DISTRO_FEATURES', 'ipv6', 'ninfod traceroute6', '', d)} \
+                   ${@bb.utils.filter('DISTRO_FEATURES', 'systemd', d)}"
 PACKAGECONFIG[libcap] = "-DUSE_CAP=true, -DUSE_CAP=false, libcap"
 PACKAGECONFIG[libgcrypt] = "-DUSE_CRYPTO=gcrypt, -DUSE_CRYPTO=none, libgcrypt"
 PACKAGECONFIG[libidn] = "-DUSE_IDN=true, -DUSE_IDN=false, libidn2"
 PACKAGECONFIG[gettext] = "-DUSE_GETTEXT=true, -DUSE_GETTEXT=false, gettext"
+PACKAGECONFIG[ninfod] = "-DBUILD_NINFOD=true,-DBUILD_NINFOD=false,"
 PACKAGECONFIG[rarpd] = "-DBUILD_RARPD=true,-DBUILD_RARPD=false,"
+PACKAGECONFIG[systemd] = "-Dsystemdunitdir=${systemd_unitdir}/system,,systemd"
 PACKAGECONFIG[traceroute6] = "-DBUILD_TRACEROUTE6=true,-DBUILD_TRACEROUTE6=false,"
 PACKAGECONFIG[docs] = "-DBUILD_HTML_MANS=true -DBUILD_MANS=true,-DBUILD_HTML_MANS=false -DBUILD_MANS=false, libxslt"
 
-inherit meson update-alternatives
+inherit meson systemd update-alternatives
 
 # Have to disable setcap/suid as its not deterministic
 EXTRA_OEMESON += "--prefix=${root_prefix}/ -DNO_SETCAP_OR_SUID=true"
@@ -42,12 +48,12 @@ ALTERNATIVE_PRIORITY = "100"
 ALTERNATIVE_${PN}-ping = "ping"
 ALTERNATIVE_LINK_NAME[ping] = "${base_bindir}/ping"
 
-SPLITPKGS = "${PN}-ping ${PN}-arping ${PN}-tracepath ${PN}-traceroute6 ${PN}-clockdiff ${PN}-tftpd ${PN}-rarpd ${PN}-rdisc ${PN}-ninfod"
+SPLITPKGS = "${PN}-ping ${PN}-arping ${PN}-tracepath ${PN}-clockdiff ${PN}-tftpd ${PN}-rdisc \
+             ${@bb.utils.contains('PACKAGECONFIG', 'rarpd', '${PN}-rarpd', '', d)} \
+             ${@bb.utils.contains('DISTRO_FEATURES', 'ipv6', '${PN}-traceroute6 ${PN}-ninfod', '', d)}"
 PACKAGES += "${SPLITPKGS}"
 
 ALLOW_EMPTY_${PN} = "1"
-ALLOW_EMPTY_${PN}-rarpd = "1"
-ALLOW_EMPTY_${PN}-traceroute6 = "1"
 RDEPENDS_${PN} += "${SPLITPKGS}"
 
 FILES_${PN} = ""
@@ -57,6 +63,11 @@ FILES_${PN}-tracepath = "${base_bindir}/tracepath"
 FILES_${PN}-traceroute6	= "${base_bindir}/traceroute6"
 FILES_${PN}-clockdiff = "${base_bindir}/clockdiff"
 FILES_${PN}-tftpd = "${base_bindir}/tftpd"
-FILES_${PN}-rarpd = "${base_sbindir}/rarpd"
+FILES_${PN}-rarpd = "${base_sbindir}/rarpd  ${systemd_unitdir}/system/rarpd@.service"
 FILES_${PN}-rdisc = "${base_sbindir}/rdisc"
 FILES_${PN}-ninfod = "${base_sbindir}/ninfod ${sysconfdir}/init.d/ninfod.sh"
+
+SYSTEMD_PACKAGES = "${@bb.utils.contains('DISTRO_FEATURES', 'ipv6', '${PN}-ninfod', '', d)} \
+                    ${PN}-rdisc"
+SYSTEMD_SERVICE_${PN}-ninfod = "ninfod.service"
+SYSTEMD_SERVICE_${PN}-rdisc = "rdisc.service"