fix(esp_modem): linux port to work with lwip-2.1.2

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)

components/esp_modem/port/linux/esp_netif_linux/CMakeLists.txt

@@ -3,6 +3,8 @@ set(LWIP_CONTRIB_DIR "$ENV{LWIP_CONTRIB_PATH}")
 
 set(lwipcontribportunix_SRCS  ${LWIP_CONTRIB_DIR}/ports/unix/port/sys_arch.c)
 
+if(NOT CMAKE_BUILD_EARLY_EXPANSION)
+
     include(${LWIP_DIR}/src/Filelists.cmake)
 
     set (LWIP_INCLUDE_DIRS
@@ -10,11 +12,11 @@ set (LWIP_INCLUDE_DIRS
         "${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 "${LWIP_DIR}/src/core/ipv4/ip4.c")
     list(REMOVE_ITEM lwipnoapps_SRCS "${LWIP_DIR}/src/core/ipv6/ip6.c")
+endif()
 
-
+idf_component_register(SRCS esp_netif_linux.cpp tun_io.c ip4_stub.c ip6_stub.c ${lwipnoapps_SRCS} ${lwipcontribportunix_SRCS}
-idf_component_register(SRCS esp_netif_linux.cpp tun_io.c ip6_stub.c ${lwipnoapps_SRCS} ${lwipcontribportunix_SRCS}
                        INCLUDE_DIRS include ${LWIP_INCLUDE_DIRS}
                        PRIV_INCLUDE_DIRS .
                        REQUIRES esp_system_protocols_linux)

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)

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; }

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)
 {

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

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;

components/esp_modem/src/esp_modem_primitives_linux.cpp

@@ -89,4 +89,9 @@ void Task::Relinquish()
     usleep(0);
 }
 
+void Task::Delay(uint32_t ms)
+{
+    usleep(ms*1000);
+}
+
 } // namespace esp_modem