diff --git a/.github/workflows/host-test.yml b/.github/workflows/host-test.yml
new file mode 100644
index 000000000..387cbe768
--- /dev/null
+++ b/.github/workflows/host-test.yml
@@ -0,0 +1,44 @@
+name: Host test
+
+on: [push, pull_request]
+
+jobs:
+  host_test:
+    name: Build and test
+    runs-on: ubuntu-20.04
+    container: espressif/idf:release-v4.3
+    env:
+      lwip: lwip-2.1.2
+      lwip_contrib: contrib-2.1.0
+      lwip_uri: http://download.savannah.nongnu.org/releases/lwip
+
+
+    steps:
+      - name: Checkout esp-protocols
+        uses: actions/checkout@master
+        with:
+          path: esp-protocols
+
+      - name: Build and Test
+        shell: bash
+        run: |
+          apt-get update && apt-get install -y gcc-8 g++-8
+          update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800 --slave /usr/bin/g++ g++ /usr/bin/g++-8
+          export LWIP_PATH=`pwd`/${{ env.lwip }}
+          export LWIP_CONTRIB_PATH=`pwd`/${{ env.lwip_contrib }}
+          wget --no-verbose ${lwip_uri}/${lwip}.zip
+          unzip -oq ${lwip}.zip
+          wget --no-verbose ${lwip_uri}/${lwip_contrib}.zip
+          unzip -oq ${lwip_contrib}.zip
+          . ${IDF_PATH}/export.sh
+          cd $GITHUB_WORKSPACE/esp-protocols/components/esp_modem/examples/linux_modem
+          idf.py build
+          cd $GITHUB_WORKSPACE/esp-protocols/components/esp_modem/test/host_test
+          idf.py build
+          ./build/host_modem_test.elf -r junit -o junit.xml
+
+      - name: Publish Results
+        uses: EnricoMi/publish-unit-test-result-action@v1
+        if: always()
+        with:
+          files: esp-protocols/components/esp_modem/test/host_test/junit.xml
diff --git a/components/esp_modem/CMakeLists.txt b/components/esp_modem/CMakeLists.txt
index dea720007..2687ef4fd 100644
--- a/components/esp_modem/CMakeLists.txt
+++ b/components/esp_modem/CMakeLists.txt
@@ -7,6 +7,7 @@ if(${target} STREQUAL "linux")
     set(dependencies esp_system_protocols_linux)
 else()
     set(platform_srcs src/esp_modem_primitives_freertos.cpp
+                      src/esp_modem_api_target.cpp
                       src/esp_modem_uart.cpp
                       src/esp_modem_term_uart.cpp
                       src/esp_modem_netif.cpp)
diff --git a/components/esp_modem/port/linux/esp_netif_linux/CMakeLists.txt b/components/esp_modem/port/linux/esp_netif_linux/CMakeLists.txt
index 515e342b2..fc6e78f54 100644
--- a/components/esp_modem/port/linux/esp_netif_linux/CMakeLists.txt
+++ b/components/esp_modem/port/linux/esp_netif_linux/CMakeLists.txt
@@ -3,18 +3,20 @@ set(LWIP_CONTRIB_DIR "$ENV{LWIP_CONTRIB_PATH}")
 
 set(lwipcontribportunix_SRCS  ${LWIP_CONTRIB_DIR}/ports/unix/port/sys_arch.c)
 
-include(${LWIP_DIR}/src/Filelists.cmake)
+if(NOT CMAKE_BUILD_EARLY_EXPANSION)
 
-set (LWIP_INCLUDE_DIRS
+    include(${LWIP_DIR}/src/Filelists.cmake)
+
+    set (LWIP_INCLUDE_DIRS
         "${LWIP_DIR}/src/include"
         "${LWIP_CONTRIB_DIR}/ports/unix/port/include")
 
-list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/netif/slipif.c")
-list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/core/ip4.c")
-list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/core/ipv6/ip6.c")
+    list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/netif/slipif.c")
+    list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/core/ipv4/ip4.c")
+    list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/core/ipv6/ip6.c")
+endif()
 
-
-idf_component_register(SRCS esp_netif_linux.cpp tun_io.c ip6_stub.c ${lwipnoapps_SRCS} ${lwipcontribportunix_SRCS}
+idf_component_register(SRCS esp_netif_linux.cpp tun_io.c ip4_stub.c ip6_stub.c ${lwipnoapps_SRCS} ${lwipcontribportunix_SRCS}
                        INCLUDE_DIRS include ${LWIP_INCLUDE_DIRS}
                        PRIV_INCLUDE_DIRS .
                        REQUIRES esp_system_protocols_linux)
diff --git a/components/esp_modem/port/linux/esp_netif_linux/esp_netif_linux.cpp b/components/esp_modem/port/linux/esp_netif_linux/esp_netif_linux.cpp
index bef1f30cf..6f97d74f6 100644
--- a/components/esp_modem/port/linux/esp_netif_linux/esp_netif_linux.cpp
+++ b/components/esp_modem/port/linux/esp_netif_linux/esp_netif_linux.cpp
@@ -90,43 +90,6 @@ public:
 extern "C" esp_netif_t *esp_netif_new(const esp_netif_config_t *config)
 {
     return new NetifStorage(config);
-//    struct ifreq ifr = { };
-//    esp_netif_t * netif = netif_storage;
-//    if (netif == NULL) {
-//        return NULL;
-//    }
-//    if ((netif->fd = open(config->dev_name, O_RDWR)) == -1) {
-//        ESP_LOGE(TAG, "Cannot open %s", config->dev_name);
-//        goto cleanup;
-//    }
-//    ifr.ifr_flags = IFF_TUN;
-//    strncpy(ifr.ifr_name, config->if_name, IFNAMSIZ);
-//
-//    if (ioctl(netif->fd, TUNSETIFF, (void *)&ifr) == -1) {
-//        ESP_LOGE(TAG, "Cannot set ioctl TUNSETIFF %m");
-//        goto cleanup;
-//    }
-//    ioctl(netif->fd, TUNSETNOCSUM, 1);
-//
-//    netif->in_buf = new uint8_t[BUF_SIZE];
-//    netif->out_buf = new uint8_t[BUF_SIZE];
-//    if (netif->in_buf == nullptr || netif->out_buf == nullptr) {
-//        goto cleanup;
-//    }
-//
-//    if (!ppp_netif_init(netif)) {
-//        ESP_LOGE(TAG, "Cannot initialize pppos lwip netif %m");
-//        goto cleanup;
-//    }
-//
-//    return netif;
-//
-//cleanup:
-//    close(netif->fd);
-//    delete[] netif->in_buf;
-//    delete[] netif->out_buf;
-//    delete netif_storage;
-//    return nullptr;
 }
 
 void esp_netif_destroy(esp_netif_t *netif)
diff --git a/components/esp_modem/port/linux/esp_netif_linux/ip4_stub.c b/components/esp_modem/port/linux/esp_netif_linux/ip4_stub.c
new file mode 100644
index 000000000..2d049c85e
--- /dev/null
+++ b/components/esp_modem/port/linux/esp_netif_linux/ip4_stub.c
@@ -0,0 +1,17 @@
+#include "lwip/ip4.h"
+
+err_t
+ip4_output_if(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+              u8_t ttl, u8_t tos,
+              u8_t proto, struct netif *netif)
+{ return ERR_OK; }
+
+struct netif *
+ip4_route(const ip4_addr_t *dest)
+{ return NULL; }
+
+err_t
+ip4_output_if_src(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,
+                  u8_t ttl, u8_t tos,
+                  u8_t proto, struct netif *netif)
+{ return ERR_OK; }
diff --git a/components/esp_modem/src/esp_modem_api.cpp b/components/esp_modem/src/esp_modem_api.cpp
index cc5c5b24f..f2c118f26 100644
--- a/components/esp_modem/src/esp_modem_api.cpp
+++ b/components/esp_modem/src/esp_modem_api.cpp
@@ -30,13 +30,6 @@ struct PdpContext;
 static const char *TAG = "modem_api";
 #endif
 
-std::shared_ptr<DTE> create_uart_dte(const dte_config *config)
-{
-    TRY_CATCH_RET_NULL(
-        auto term = create_uart_terminal(config);
-        return std::make_shared<DTE>(config, std::move(term));
-    )
-}
 
 std::shared_ptr<DTE> create_vfs_dte(const dte_config *config)
 {
diff --git a/components/esp_modem/src/esp_modem_api_target.cpp b/components/esp_modem/src/esp_modem_api_target.cpp
new file mode 100644
index 000000000..c72175c23
--- /dev/null
+++ b/components/esp_modem/src/esp_modem_api_target.cpp
@@ -0,0 +1,39 @@
+// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cassert>
+#include "esp_log.h"
+#include "cxx_include/esp_modem_dte.hpp"
+#include "uart_terminal.hpp"
+#include "vfs_termial.hpp"
+#include "cxx_include/esp_modem_api.hpp"
+#include "cxx_include/esp_modem_dce_factory.hpp"
+#include "esp_modem_config.h"
+#include "exception_stub.hpp"
+
+namespace esp_modem {
+
+#ifdef CONFIG_COMPILER_CXX_EXCEPTIONS
+static const char *TAG = "modem_api_target";
+#endif
+
+std::shared_ptr<DTE> create_uart_dte(const dte_config *config)
+{
+    TRY_CATCH_RET_NULL(
+            auto term = create_uart_terminal(config);
+    return std::make_shared<DTE>(config, std::move(term));
+    )
+}
+
+} // namespace esp_modem
diff --git a/components/esp_modem/src/esp_modem_c_api.cpp b/components/esp_modem/src/esp_modem_c_api.cpp
index ec508fa80..7c48fb406 100644
--- a/components/esp_modem/src/esp_modem_c_api.cpp
+++ b/components/esp_modem/src/esp_modem_c_api.cpp
@@ -27,6 +27,10 @@
 #define ESP_MODEM_C_API_STR_MAX 64
 #endif
 
+#ifndef HAVE_STRLCPY
+size_t strlcpy(char *dest, const char *src, size_t len);
+#endif
+
 //
 // C API definitions
 using namespace esp_modem;
diff --git a/components/esp_modem/src/esp_modem_primitives_freertos.cpp b/components/esp_modem/src/esp_modem_primitives_freertos.cpp
index 66ddcc29e..f1da74adb 100644
--- a/components/esp_modem/src/esp_modem_primitives_freertos.cpp
+++ b/components/esp_modem/src/esp_modem_primitives_freertos.cpp
@@ -111,4 +111,4 @@ void Task::Delay(uint32_t ms)
     vTaskDelay(pdMS_TO_TICKS(ms));
 }
 
-} // namespace esp_modem
\ No newline at end of file
+} // namespace esp_modem
diff --git a/components/esp_modem/src/esp_modem_primitives_linux.cpp b/components/esp_modem/src/esp_modem_primitives_linux.cpp
index dd1553bc9..dd4875b60 100644
--- a/components/esp_modem/src/esp_modem_primitives_linux.cpp
+++ b/components/esp_modem/src/esp_modem_primitives_linux.cpp
@@ -89,4 +89,9 @@ void Task::Relinquish()
     usleep(0);
 }
 
-} // namespace esp_modem
\ No newline at end of file
+void Task::Delay(uint32_t ms)
+{
+    usleep(ms*1000);
+}
+
+} // namespace esp_modem