third_party/libpcap/regen.sh

#!/bin/bash
# Copyright 2021 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

source "$FUCHSIA_DIR"/tools/devshell/lib/vars.sh

set -euxo pipefail

readonly REPO_DIR="$FUCHSIA_DIR/third_party/libpcap"
LIBPCAP_TAG="libpcap-$(cat "$REPO_DIR/src/RELEASE_VERSION")"
readonly LIBPCAP_TAG

readonly CONFIG_H="$REPO_DIR/config.h"

"$FUCHSIA_DIR"/scripts/autoconf/regen.sh \
  FUCHSIA_OUT_CONFIG_H="$CONFIG_H.fuchsia" \
  LINUX_OUT_CONFIG_H="$CONFIG_H.linux" \
  REPO_ZIP_URL="https://github.com/the-tcpdump-group/libpcap/archive/refs/tags/$LIBPCAP_TAG.zip" \
  REPO_EXTRACTED_FOLDER="libpcap-$LIBPCAP_TAG"

# Manually override some symbols we don't need on Linux since we don't need
# sniffing of USB or netfilter messages and not defining these preprocessor
# variables allow us to not have to pull in source code that we don't need.
for i in PCAP_SUPPORT_{LINUX_USBMON,NETFILTER}; do
  sed -i "s,^#define $i 1$,/* #undef $i */," "$CONFIG_H.linux"
done