Add tcpdump for linux x86_64

tcpdump/x86_64/build.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# this script runs inside an Alpine docker container created by ./set_up.sh
+
+if ! command -v wget >/dev/null 2>&1; then
+    apk add wget
+fi
+
+wget https://www.tcpdump.org/release/tcpdump-4.9.3.tar.gz
+tar -xvpf tcpdump-4.9.3.tar.gz
+cd tcpdump-4.9.3 || (
+    echo "tcpdump source not found"
+    exit 1
+)
+
+apk add libpcap-dev || exit 1
+
+LDFLAGS=-static ./configure || (
+    echo -e "\n\n Failed to configure,check the error output"
+    exit 1
+)
+
+make -j4 || (
+    echo -e "\n\n Failed to build tcpdump, check the error output"
+    exit 1
+)
+
+echo -e "\n\n TCPDUMP has been built:"
+ls -lh "$PWD"/tcpdump

tcpdump/x86_64/set_up.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# set up Alpine docker container and copy our build script into it
+
+if ! command -v docker >/dev/null 2>&1; then
+    echo "Please install Docker first"
+    exit 1
+fi
+
+docker pull alpine || (
+    echo "docker pull failed, make sure docker is usable"
+    exit 1
+)
+
+docker run --name alpine_tcpdump -it alpine /bin/sh -i
+docker cp ./build.sh alpine_tcpdump:/root/build_tcpdump.sh
+docker exec -it alpine_tcpdump /bin/sh /root/build_tcpdump.sh