[OE-core][PATCH] libpcap: add ptest support

[Pratik Farkase <pratik.farkase@est.tech>]

Build libpcap's upstream testprogs and run the TESTrun harness under
ptest. The harness drives filtertest, translatetest and enumeratetest to
compile and translate BPF filter expressions against bundled savefiles and
compares the results with the embedded expected output. These tests are
offline and deterministic and need no capture privileges or network.

Signed-off-by: Pratik Farkase <pratik.farkase@est.tech>
---
 .../distro/include/ptest-packagelists.inc     |  1 +
 .../libpcap/files/run-ptest                   | 30 ++++++++++++++
 .../libpcap/libpcap_1.11.0.bb                 | 39 ++++++++++++++++++-
 3 files changed, 68 insertions(+), 2 deletions(-)
 create mode 100644 meta/recipes-connectivity/libpcap/files/run-ptest

diff --git a/meta/conf/distro/include/ptest-packagelists.inc b/meta/conf/distro/include/ptest-packagelists.inc
index 7d0a9148bc..3ba103de06 100644
--- a/meta/conf/distro/include/ptest-packagelists.inc
+++ b/meta/conf/distro/include/ptest-packagelists.inc
@@ -136,6 +136,7 @@ PTESTS_SLOW = "\
     libevent \
     libgcrypt \
     libmodule-build-perl \
+    libpcap \
     libpng \
     ${@bb.utils.contains('DISTRO_FEATURES', 'seccomp', 'libseccomp', '',d)} \
     lttng-tools \
diff --git a/meta/recipes-connectivity/libpcap/files/run-ptest b/meta/recipes-connectivity/libpcap/files/run-ptest
new file mode 100644
index 0000000000..cc0e1862ac
--- /dev/null
+++ b/meta/recipes-connectivity/libpcap/files/run-ptest
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+cd "$(dirname "$0")/testprogs" || exit 1
+
+FILTERTEST_BIN="./filtertest"
+TRANSLATETEST_BIN="./translatetest"
+ENUMERATETEST_BIN="./enumeratetest"
+CONFIG_H="../config.h"
+export FILTERTEST_BIN TRANSLATETEST_BIN ENUMERATETEST_BIN CONFIG_H
+
+./TESTrun --passed --skipped 2>&1 | awk '
+    /^Passed tests:/  { section = "PASS"; next }
+    /^Skipped tests:/ { section = "SKIP"; next }
+    /^Failed tests:/  { section = "FAIL"; next }
+    /^-+$/            { section = ""; next }
+    section != "" && /^    / {
+        c = index($0, ": ")
+        if (c >= 45) {
+            label = substr($0, 5, c - 5)
+            sub(/[[:space:]]+$/, "", label)
+            if (label != "")
+                print section ": " label
+        }
+    }
+'
diff --git a/meta/recipes-connectivity/libpcap/libpcap_1.11.0.bb b/meta/recipes-connectivity/libpcap/libpcap_1.11.0.bb
index df63ab68b8..ad4e64861d 100644
--- a/meta/recipes-connectivity/libpcap/libpcap_1.11.0.bb
+++ b/meta/recipes-connectivity/libpcap/libpcap_1.11.0.bb
@@ -10,10 +10,12 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=5eb289217c160e2920d2e35bddc36453 \
                     file://pcap.h;beginline=1;endline=32;md5=39af3510e011f34b8872f120b1dc31d2"
 DEPENDS = "flex-native bison-native"
 
-SRC_URI = "https://www.tcpdump.org/release/${BP}.tar.xz"
+SRC_URI = "https://www.tcpdump.org/release/${BP}.tar.xz \
+           file://run-ptest \
+           "
 SRC_URI[sha256sum] = "9237f5bae9dcf3a91823d9963ec43b7c0e2e3374ef2ad57d92c8cd39530f4723"
 
-inherit autotools binconfig-disabled pkgconfig
+inherit autotools binconfig-disabled pkgconfig ptest
 
 BINCONFIG = "${bindir}/pcap-config"
 
@@ -36,4 +38,33 @@ do_configure:prepend () {
     sed 's|\([ "^'\''I]\+\)/usr/include/|\1${STAGING_INCDIR}/|g' -i ${S}/configure.ac
 }
 
+do_compile_ptest() {
+    oe_runmake -C ${B}/testprogs CFLAGS="${CFLAGS} ${LDFLAGS}" \
+        filtertest translatetest enumeratetest
+}
+
+do_install_ptest() {
+    install -d ${D}${PTEST_PATH}/testprogs
+    install -d ${D}${PTEST_PATH}/tests
+
+    # Perl harness and its helper modules.
+    install -m 0755 ${S}/testprogs/TESTrun ${D}${PTEST_PATH}/testprogs/
+    install -m 0644 ${S}/testprogs/TESTlib.pm ${D}${PTEST_PATH}/testprogs/
+    install -m 0644 ${S}/testprogs/TESTst.pm ${D}${PTEST_PATH}/testprogs/
+    install -m 0644 ${S}/testprogs/TESTmt.pm ${D}${PTEST_PATH}/testprogs/
+
+    # Offline test programs driven by the harness.
+    install -m 0755 ${B}/testprogs/filtertest ${D}${PTEST_PATH}/testprogs/
+    install -m 0755 ${B}/testprogs/translatetest ${D}${PTEST_PATH}/testprogs/
+    install -m 0755 ${B}/testprogs/enumeratetest ${D}${PTEST_PATH}/testprogs/
+
+    # Savefiles used by the filter tests (SAVEFILE_DIR is testprogs/../tests).
+    cp -r ${S}/tests/* ${D}${PTEST_PATH}/tests/
+
+    # config.h is read by TESTrun for feature-based test skipping.
+    install -m 0644 ${B}/config.h ${D}${PTEST_PATH}/config.h
+}
+
+RDEPENDS:${PN}-ptest += "perl perl-modules coreutils diffutils"
+
 BBCLASSEXTEND = "native nativesdk"
-- 
2.43.0