ot-br-posix: add recipe for an OpenThread Border Router

The OpenThread project is an open source implementation of the Thread
low-power mesh network protocol. In a Thread network devices can have
different roles, and of of these roles is a Border Router that allows a
Thread network to be connected with other IP networks.

Ot-br-posix runs as a systemd service on a standard Linux system to
handle the connection to a Thread network.

In terms of patches we need a fix to allow building on musl + clang
(CMSG_NXTHDR macro triggers a -Wsign-compare warning) and a systemd
unit file change is OE specific and avoids having service dependencies
implemented as pre exec hooks.

Signed-off-by: Stefan Schmidt <stefan.schmidt@huawei.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
This commit is contained in:
Stefan Schmidt 2022-04-07 21:14:35 +02:00 committed by Khem Raj
parent b9e440ead8
commit bb6a70a463
3 changed files with 225 additions and 0 deletions

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@ -0,0 +1,35 @@
From ed60d4605b81c43b9ba9504a37835109c247c6f8 Mon Sep 17 00:00:00 2001
From: Stefan Schmidt <stefan.schmidt@huawei.com>
Date: Fri, 1 Apr 2022 21:46:03 +0200
Subject: [PATCH] otbr-agent.service.in: remove pre exec hook for mdns service
It uses the service command which is not available in all cases under
Yocto/OE. The upstream project uses this mainly with Ubuntu and Raspian
as testbeds.
In our case we simply ensure that avahi-daemon is installed on the
system inside the recipe.
Upstream-Status: Inappropriate [OE specific]
Signed-off-by: Stefan Schmidt <stefan.schmidt@huawei.com>
---
src/agent/otbr-agent.service.in | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/agent/otbr-agent.service.in b/src/agent/otbr-agent.service.in
index 8314121347..4c97869def 100644
--- a/src/agent/otbr-agent.service.in
+++ b/src/agent/otbr-agent.service.in
@@ -6,7 +6,7 @@ After=dbus.socket
[Service]
EnvironmentFile=-@CMAKE_INSTALL_FULL_SYSCONFDIR@/default/otbr-agent
-@EXEC_START_PRE@ExecStart=@CMAKE_INSTALL_FULL_SBINDIR@/otbr-agent $OTBR_AGENT_OPTS
+ExecStart=@CMAKE_INSTALL_FULL_SBINDIR@/otbr-agent $OTBR_AGENT_OPTS
KillMode=mixed
Restart=on-failure
RestartSec=5
--
2.35.1

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@ -0,0 +1,131 @@
From: Stefan Schmidt <stefan.schmidt@huawei.com>
Subject: Turn off sign compare for musl libc
When building with musl and clang the usage of CMSG_NXTHDR results in
sign-compare error. Disable the check only in this specific part of the
code with a #pragma.
| /home/stefan/huawei/yocto-upstream/yoe/workspace/sources/ot-br-posix/third_party/openthread/repo/src/posix/platform/udp.cpp:147:28: fatal error: comparison of integers of different signs: 'unsigned long' and 'long' [-Wsign-compare]
| cmsg = CMSG_NXTHDR(&msg, cmsg);
| ^~~~~~~~~~~~~~~~~~~~~~~
| /home/stefan/huawei/yocto-upstream/yoe/build/tmp/work/cortexa57-yoe-linux-musl/ot-br-posix/0.3.0+git999-r0/recipe-sysroot/usr/include/sys/socket.h:358:44: note: expanded from macro 'CMSG_NXTHDR'
| __CMSG_LEN(cmsg) + sizeof(struct cmsghdr) >= __MHDR_END(mhdr) - (unsigned char *)(cmsg) \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| 1 error generated.
Idea and fix taken from
recipes-devtools/breakpad/breakpad/0001-Turn-off-sign-compare-for-musl-libc.patch
by Khem Raj.
Upstream-Status: Inappropriate [OE specific]
Signed-off-by: Stefan Schmidt <stefan.schmidt@huawei.com>
diff --git a/src/backbone_router/nd_proxy.cpp b/src/backbone_router/nd_proxy.cpp
index 7136878c3d..8a223c95c7 100644
--- a/src/backbone_router/nd_proxy.cpp
+++ b/src/backbone_router/nd_proxy.cpp
@@ -185,9 +185,18 @@ void NdProxyManager::ProcessMulticastNeighborSolicition()
VerifyOrExit(icmp6header->icmp6_type == ND_NEIGHBOR_SOLICIT, error = OTBR_ERROR_PARSE);
otbrLogDebug("NdProxyManager: Received ND-NS from %s", src.ToString().c_str());
-
+#ifndef __GLIBC__
+ // In musl-libc, CMSG_NXTHDR typecasts char* to cmsghdr* which causes
+ // clang to throw sign-compare warning. This is to suppress the warning
+ // inline.
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wsign-compare"
+#endif
for (cmsghdr = CMSG_FIRSTHDR(&msghdr); cmsghdr; cmsghdr = CMSG_NXTHDR(&msghdr, cmsghdr))
- {
+#ifndef __GLIBC__
+ #pragma clang diagnostic pop
+#endif
+ {
if (cmsghdr->cmsg_level != IPPROTO_IPV6)
{
continue;
Submodule third_party/openthread/repo contains modified content
diff --git a/third_party/openthread/repo/src/posix/platform/infra_if.cpp b/third_party/openthread/repo/src/posix/platform/infra_if.cpp
index 9f93d2b1c..1ed40fe50 100644
--- a/third_party/openthread/repo/src/posix/platform/infra_if.cpp
+++ b/third_party/openthread/repo/src/posix/platform/infra_if.cpp
@@ -228,7 +228,17 @@ otError InfraNetif::SendIcmp6Nd(uint32_t aInfraIfIndex,
packetInfo->ipi6_ifindex = mInfraIfIndex;
// Per section 6.1.2 of RFC 4861, we need to send the ICMPv6 message with IP Hop Limit 255.
+#ifndef __GLIBC__
+ // In musl-libc, CMSG_NXTHDR typecasts char* to cmsghdr* which causes
+ // clang to throw sign-compare warning. This is to suppress the warning
+ // inline.
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wsign-compare"
+#endif
cmsgPointer = CMSG_NXTHDR(&msgHeader, cmsgPointer);
+#ifndef __GLIBC__
+ #pragma clang diagnostic pop
+#endif
cmsgPointer->cmsg_level = IPPROTO_IPV6;
cmsgPointer->cmsg_type = IPV6_HOPLIMIT;
cmsgPointer->cmsg_len = CMSG_LEN(sizeof(hopLimit));
@@ -481,7 +491,17 @@ void InfraNetif::ReceiveIcmp6Message(void)
bufferLength = static_cast<uint16_t>(rval);
+#ifndef __GLIBC__
+ // In musl-libc, CMSG_NXTHDR typecasts char* to cmsghdr* which causes
+ // clang to throw sign-compare warning. This is to suppress the warning
+ // inline.
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wsign-compare"
+#endif
for (cmh = CMSG_FIRSTHDR(&msg); cmh; cmh = CMSG_NXTHDR(&msg, cmh))
+#ifndef __GLIBC__
+ #pragma clang diagnostic pop
+#endif
{
if (cmh->cmsg_level == IPPROTO_IPV6 && cmh->cmsg_type == IPV6_PKTINFO &&
cmh->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
diff --git a/third_party/openthread/repo/src/posix/platform/udp.cpp b/third_party/openthread/repo/src/posix/platform/udp.cpp
index b7aacc5fa..a814fea70 100644
--- a/third_party/openthread/repo/src/posix/platform/udp.cpp
+++ b/third_party/openthread/repo/src/posix/platform/udp.cpp
@@ -144,8 +144,18 @@ otError transmitPacket(int aFd, uint8_t *aPayload, uint16_t aLength, const otMes
{
struct in6_pktinfo pktinfo;
+#ifndef __GLIBC__
+ // In musl-libc, CMSG_NXTHDR typecasts char* to cmsghdr* which causes
+ // clang to throw sign-compare warning. This is to suppress the warning
+ // inline.
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wsign-compare"
+#endif
cmsg = CMSG_NXTHDR(&msg, cmsg);
- cmsg->cmsg_level = IPPROTO_IPV6;
+#ifndef __GLIBC__
+ #pragma clang diagnostic pop
+#endif
+ cmsg->cmsg_level = IPPROTO_IPV6;
cmsg->cmsg_type = IPV6_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(pktinfo));
@@ -200,7 +210,17 @@ otError receivePacket(int aFd, uint8_t *aPayload, uint16_t &aLength, otMessageIn
VerifyOrExit(rval > 0, perror("recvmsg"));
aLength = static_cast<uint16_t>(rval);
+#ifndef __GLIBC__
+ // In musl-libc, CMSG_NXTHDR typecasts char* to cmsghdr* which causes
+ // clang to throw sign-compare warning. This is to suppress the warning
+ // inline.
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wsign-compare"
+#endif
for (struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); cmsg != nullptr; cmsg = CMSG_NXTHDR(&msg, cmsg))
+#ifndef __GLIBC__
+ #pragma clang diagnostic pop
+#endif
{
if (cmsg->cmsg_level == IPPROTO_IPV6)
{

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# SPDX-FileCopyrightText: Huawei Inc.
#
# SPDX-License-Identifier: Apache-2.0
SUMMARY = "OpenThread Border Router"
SECTION = "net"
LICENSE = "BSD-3-Clause & MIT"
LIC_FILES_CHKSUM = "file://LICENSE;md5=87109e44b2fda96a8991f27684a7349c \
file://third_party/Simple-web-server/repo/LICENSE;md5=852b3f7f320b19f6431487b8b2fb1d74 \
file://third_party/cJSON/repo/LICENSE;md5=218947f77e8cb8e2fa02918dc41c50d0 \
file://third_party/http-parser/repo/LICENSE-MIT;md5=9bfa835d048c194ab30487af8d7b3778 \
file://third_party/openthread/repo/LICENSE;md5=543b6fe90ec5901a683320a36390c65f \
"
DEPENDS = "autoconf-archive dbus readline avahi jsoncpp boost libnetfilter-queue"
SRCREV = "ad6822257ffddbac295db97186e4ab449a2ed32a"
PV = "0.3.0+git${SRCPV}"
SRC_URI = "gitsm://github.com/openthread/ot-br-posix.git;protocol=https;branch=main \
file://0001-otbr-agent.service.in-remove-pre-exec-hook-for-mdns-.patch \
file://Turn-off-sign-compare-for-musl-libc.patch \
"
S = "${WORKDIR}/git"
SYSTEMD_SERVICE:${PN} = "otbr-agent.service"
inherit pkgconfig cmake systemd
EXTRA_OECMAKE = "-DBUILD_TESTING=OFF \
-DOTBR_DBUS=ON \
-DOTBR_REST=ON \
-DOTBR_WEB=OFF \
-DCMAKE_LIBRARY_PATH=${libdir} \
-DOTBR_MDNS=avahi \
-DOTBR_BACKBONE_ROUTER=ON \
-DOTBR_BORDER_ROUTING=ON \
-DOTBR_SRP_ADVERTISING_PROXY=ON \
-DOTBR_BORDER_AGENT=ON \
-DOT_SPINEL_RESET_CONNECTION=ON \
-DOT_TREL=ON \
-DOT_MLR=ON \
-DOT_SRP_SERVER=ON \
-DOT_ECDSA=ON \
-DOT_SERVICE=ON \
-DOTBR_DUA_ROUTING=ON \
-DOT_DUA=ON \
-DOT_BORDER_ROUTING_NAT64=ON \
-DOTBR_DNSSD_DISCOVERY_PROXY=ON \
-DOTBR_INFRA_IF_NAME=eth0 \
-DOTBR_NO_AUTO_ATTACH=1 \
-DOT_REFERENCE_DEVICE=ON \
-DOT_DHCP6_CLIENT=ON \
-DOT_DHCP6_SERVER=ON \
"
RDEPENDS:${PN} = "iproute2 avahi-daemon"
RCONFLICTS:${PN} = "ot-daemon"
FILES:${PN} += "${systemd_unitdir}/*"
FILES:${PN} += "${datadir}/*"