libpcap-on-android.md

Clone libpcap repository and Create build directory.

$ cd path/to/libpcap/source
$ mkdir build
$ cd build

Then, Write Android.cmake, CMake toolchain file for Android.

See also: Cross-compiling for Android

$ cat Android.cmake
set(CMAKE_ANDROID_NDK       "/path/to/ndk")

set(CMAKE_SYSTEM_NAME       "Android")
set(CMAKE_SYSTEM_VERSION    24)
set(CMAKE_ANDROID_ARCH_ABI  "armeabi-v7a")
set(CMAKE_ANDROID_STL_TYPE  "c++_static")
set(CMAKE_ANDROID_TOOLCHAIN "clang")

Prepare to compile without unnecessary interfaces.

$ cmake                                      \
  -DDISABLE_DBUS=True                        \
  -DDISABLE_RDMA=True                        \
  -DDISABLE_DAG=True                         \
  -DDISABLE_SEPTEL=True                      \
  -DDISABLE_SNF=True                         \
  -DDISABLE_AIRPCAP=True                     \
  -DDISABLE_TC=True                          \
  -DCMAKE_GENERATOR=Ninja                    \
  -DCMAKE_C_FLAGS="-O3"                      \
  -DCMAKE_BUILD_TYPE=Release                 \
  -DCMAKE_TOOLCHAIN_FILE=../../Android.cmake \
  ..

Let's compile!

$ ninja

If you enabled DPDK support, DPDK version v21.10 or below is required to build.

See: the-tcpdump-group/libpcap#1159

Android API version should be equal or greater than 24, so system can use fseeko.