Merge branch 'refactor' into 'master'

Add esp socket between lwip and wifi

See merge request sdk/ESP8266_RTOS_SDK!96

components/esp8266/include/esp_aio.h

@@ -0,0 +1,64 @@
+// Copyright 2018 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.
+
+#ifndef _ESP_AIO_H
+#define _ESP_AIO_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * declare
+ */
+struct esp_aio;
+
+/*
+ * aio callback function type
+ */
+typedef int (*esp_aio_cb_t)(struct esp_aio *aio);
+
+/*
+ * aio data object
+ */
+typedef struct esp_aio {
+    int             fd;     // file description
+
+    const char      *pbuf;  // send/recv data pointer
+    size_t          len;    // buffer length by bytes
+
+    esp_aio_cb_t    cb;     // callback function
+    void            *arg;   // user callback function private data
+
+    int             ret;    // asynchronous operation result
+} esp_aio_t;
+
+/*
+ * aio data object
+ */
+typedef struct esp_aio_data {
+    const char      *pbuf;  // send/recv data pointer
+    size_t          len;    // buffer length by bytes
+
+    int             status; // lowlevel data status
+} esp_aio_data_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ESP_AIO_H */

components/esp8266/include/esp_module.h

@@ -0,0 +1,38 @@
+// Copyright 2018 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.
+
+#ifndef _ESP_MODULE_H
+#define _ESP_MODULE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define __EXPORT_SYMBOL_NAME(sec) "ksymatab"sec
+
+#define __EXPORT_SYMBOL(sym, sec)                       \
+    static const typeof(sym) *__ksymtab_##sym           \
+       __attribute__((used,section("ksymatab"sec)))     \
+       = &sym
+
+#define __DECLARE_SYMBOL_NAME(sec) __EXPORT_SYMBOL_NAME(sec)
+
+#define __DECLARE_SYMBOL(type, sym, sec)                \
+    static const type sym __attribute__((used,section("ksymatab"sec),aligned(sizeof(void *))))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ESP_MODULE_H */

components/esp8266/include/esp_socket.h

@@ -0,0 +1,230 @@
+// Copyright 2018 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.
+
+#ifndef _ESP_SOCKET_H
+#define _ESP_SOCKET_H
+
+#include <stdint.h>
+
+#include "esp_aio.h"
+#include "esp_module.h"
+#include "net/if_packet.h"
+#include "net/if_socket.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* used for socket link */
+#define ESP_SOCKET_METHOD_BASENAME        "esp_socket"
+#define ESP_SOCKET_METHOD_NAME(sec)       __DECLARE_SYMBOL_NAME(ESP_SOCKET_METHOD_BASENAME)
+#define ESP_SOCKET_METHOD_DECLARE(sym)    __DECLARE_SYMBOL(esp_socket_method_t, sym, ESP_SOCKET_METHOD_BASENAME)
+
+#ifndef socklen_t
+typedef uint32_t socklen_t;
+#endif
+
+#define esp_socket_va_start(va, arg)      va = (va_list)arg
+
+/*
+ * socket async event
+ */
+enum esp_socket_event_type {
+    ESP_SOCKET_CONNECT_EVENT = 0,
+    ESP_SOCKET_ACCEPT_EVENT = ESP_SOCKET_CONNECT_EVENT,
+    ESP_SOCKET_RECV_EVENT = 1,
+    ESP_SOCKET_ERROR_EVENT = 2,
+
+    ESP_SOCKET_MAX_EVENT
+};
+
+/*
+ * socket information object
+ */
+typedef struct esp_socket_info {
+    int     domain;
+    int     type;
+    int     protocol;
+} esp_socket_info_t;
+
+/*
+ * socket method object
+ */
+typedef struct esp_socket_method {
+    /*
+     * socket method name
+     */
+    const char *name;
+
+    /*
+     * @brief open lowlevel socket module
+     *
+     * @param info socket information
+     *
+     * @return return lowlevel socket index if successfully, otherwise return NULL
+     *         and you can get the real fail reason by "errno"
+     */
+    void* (*open)(esp_socket_info_t *info);
+
+    /*
+     * @brief send a block of data asynchronously and receive result by callback function
+     *
+     * @param index lowlevel index
+     * @param aio asynchronous I/O controlling block
+     * @param to target address with lowlevel address data format
+     * @param len target address data length
+     *
+     * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+     *         reason by "errno"
+     */
+    int (*aio_sendto)(void *index, esp_aio_t *aio, const struct sockaddr_ll *to, socklen_t len);
+
+    /*
+     * @brief register an event and its callback function to lowlevel socket module
+     *
+     * @param index lowlevel index
+     * @param event asynchronous I/O event
+     * @param cb callback function
+     * @param arg callback function parameter
+     *
+     * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+     *         reason by "errno"
+     */
+    int (*aio_event)(void *index, unsigned int event, esp_aio_cb_t cb, void *arg);
+
+    /*
+     * @brief free buffer taken from event callback
+     * 
+     * @param index lowlevel index
+     * @param pbuf buffer pointer
+     * 
+     * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+     *         reason by "errno"
+     */
+    int (*free_pbuf)(void *index, void *pbuf);
+
+    /*
+     * @brief send request command to lowlevel socket module and get the result synchronously
+     *
+     * @param index lowlevel index
+     * @param cmd request command
+     * @param arg start address to variable parameters
+     *
+     * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+     *         reason by "errno"
+     */
+    int (*ioctl)(void *index, unsigned int cmd, void *arg);
+
+    /*
+     * @brief close lowlevel socket module
+     *
+     * @param index lowlevel index
+     *
+     * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+     *         reason by "errno"
+     */
+    int (*close)(void *index);
+} esp_socket_method_t;
+
+/*
+ * @brief create a socket file description
+ *
+ * @param domain protocal domain and it must be "AF_PACKET" now
+ * @param type socket type and it must be "SOCK_RAW" now
+ * @param protocol target protocol and it must be "ETH_P_ALL" now
+ *
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ *
+ * @note using "AF_PACKET", "SOCK_RAW" and "ETH_P_ALL" means that you receive and send full
+ *       ethernet II type message with full message head: " destination mac | source mac | type"
+ */
+int esp_socket(int domain, int type, int protocol);
+
+/*
+ * @brief send a block of data asynchronously and receive result by callback function
+ *
+ * @param aio asynchronous I/O controlling block
+ * @param to target address with lowlevel address data format
+ * @param len target address data length
+ *
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ */
+int esp_aio_sendto(esp_aio_t *aio, const struct sockaddr_ll *to, socklen_t len);
+
+/*
+ * @brief register an event and its callback function to target of file description
+ *
+ * @param fd file description
+ * @param event asynchronous I/O event
+ * @param cb callback function
+ * @param arg callback function parameter
+ *
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ */
+int esp_aio_event(int fd, unsigned int event, esp_aio_cb_t cb, void *arg);
+
+/*
+ * @brief lowlevel socket module upload event and its data
+ *
+ * @param index lowlevel index
+ * @param info socket information
+ * @param event asynchronous I/O event
+ * @param aio asynchronous I/O controlling block
+ *
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ */
+int esp_upload_event(void *index, esp_socket_info_t *info, unsigned int event, esp_aio_data_t *aio_data);
+
+/*
+ * @brief free buffer taken from event callback
+ * 
+ * @param fd file description
+ * @param pbuf buffer pointer
+ * 
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ */
+int esp_free_pbuf(int fd, void *pbuf);
+
+/*
+ * @brief send request command to target by file description and get the result synchronously
+ *
+ * @param fd file description
+ * @param cmd request command
+ * @param ... realy command parameters and it must be related to realy object of lowlevel
+ *
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ */
+int esp_ioctl(int fd, unsigned int cmd, ...);
+
+/*
+ * @brief close target of file description
+ *
+ * @param fd file description
+ *
+ * @return return 0 if successfully, otherwise return -1 and you can get the real fail
+ *         reason by "errno"
+ */
+int esp_close(int fd);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ESP_SOCKET_H */

components/esp8266/include/net/if_packet.h

@@ -0,0 +1,41 @@
+// Copyright 2018 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.
+
+#ifndef _IF_PACKET_H
+#define _IF_PACKET_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * socket II type address used by low-level module whose address is base on MAC address
+ *
+ * Note: Now it just support 802.3 and 802.11 protocol, so only "sll_addr" works here
+ */
+struct sockaddr_ll {
+    unsigned short      sll_family;     // it must be AF_PACKET
+    unsigned short      sll_protocol;   // physics level protocol
+    int                 sll_ifindex;    // interface index not socket ID
+    unsigned short      sll_hatype;     // ARP hardware address type
+    unsigned char       sll_pkttype;    // packet type
+    unsigned char       sll_halen;      // hardware address length
+    unsigned char       sll_addr[8];    // address data
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _IF_PACKET_H */

components/esp8266/include/net/if_socket.h

@@ -0,0 +1,76 @@
+// Copyright 2018 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.
+
+#ifndef _IF_ETHER_H
+#define _IF_ETHER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * undefine some global macro
+ */
+#undef ETH_P_ALL
+#undef ETH_P_ARP
+#undef ETH_P_IP
+
+#undef AF_PACKET
+
+#undef SOCK_RAW
+
+/*
+ * socket domain
+ */
+#define AF_PACKET 0
+
+/*
+ * socket type
+ */
+#define SOCK_RAW 0
+
+/*
+ * use 16(2^4) type for socket
+ */ 
+#define IF_SOCK_SHIFT           4
+#define IF_SOCK_TYPE(d)         (d & 0xf)
+#define IF_SOCK_DATA(t, s)      ((1 << (s + IF_SOCK_SHIFT)) + t)
+
+enum if_sock_type {
+    IF_SOCK_ETH = 0,
+    IF_SOCK_WIFI,
+
+    IF_SOCK_MAX,
+};
+
+#define IF_ETH_DATA(s)          IF_SOCK_DATA(IF_SOCK_ETH, s)
+#define IF_WIFI_DATA(s)         IF_SOCK_DATA(IF_SOCK_WIFI, s)
+
+/*
+ * socket protocol
+ */
+#define ETH_P_IP                IF_ETH_DATA(0)
+#define ETH_P_ARP               IF_ETH_DATA(1)
+#define ETH_P_ALL               ETH_P_IP | ETH_P_ARP
+
+#define WIFI_P_MNG              IF_WIFI_DATA(0)
+#define WIFI_P_CTL              IF_WIFI_DATA(1)
+#define WIFI_P_DAT              IF_WIFI_DATA(2)
+#define WIFI_P_ALL              WIFI_P_MNG | WIFI_P_CTL | WIFI_P_DAT
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _IF_ETHER_H */

components/esp8266/include/net/sockio.h

@@ -0,0 +1,46 @@
+// Copyright 2018 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.
+
+#ifndef _SOCKIO_H
+#define _SOCKIO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* espressif specific socket ioctls */
+#define SIOESPSTART         0x5500              /* start of espressif specific code */
+
+/* routing table calls. */
+#define SIOCADDRT           0x890B              /* add routing table entry	*/
+#define SIOCDELRT           0x890C              /* delete routing table entry	*/
+#define SIOCRTMSG           0x890D              /* call to routing system	*/
+
+/* socket configuration controls. */
+#define SIOCGIFADDR         0x8915              /* get PA address		*/
+#define SIOCSIFADDR         0x8916              /* set PA address		*/
+#define SIOCGIFBRDADDR      0x8919              /* get broadcast PA address	*/
+#define SIOCSIFBRDADDR      0x891a              /* set broadcast PA address	*/
+#define SIOCGIFNETMASK      0x891b              /* get network PA mask		*/
+#define SIOCSIFNETMASK      0x891c              /* set network PA mask		*/
+#define SIOCSIFHWADDR       0x8924              /* set hardware address 	*/
+#define SIOCGIFHWADDR       0x8927              /* Get hardware address		*/
+#define SIOCGIFINDEX        0x8933              /* name -> if_index mapping	*/
+#define SIOGIFINDEX         SIOCGIFINDEX        /* misprint compatibility :-)	*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SOCKIO_H */

components/esp8266/ld/eagle.app.v6.common.ld

@@ -114,6 +114,12 @@ SECTIONS
     *libplatforms.a:(.rodata.* .rodata)
     *(.irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text)
     *(.literal.* .text.*)
+
+    . = ALIGN(16);
+    __start_ksymatabesp_socket = .;
+    *(ksymatabesp_socket)
+    __stop_ksymatabesp_socket = .;
+
     _irom0_text_end = ABSOLUTE(.);
   } >irom0_0_seg :irom0_0_phdr
 

components/esp8266/lib/VERSION

@@ -1,11 +1,11 @@
 gwen:
     crypto:     5fc5b4f
     espnow:     5fc5b4f
-    core:       5fc5b4f
+    core:       06675a3
     minic:      5fc5b4f
-    net80211:   5fc5b4f
+    net80211:   06675a3
-    pp:         5fc5b4f
+    pp:         06675a3
     pwm:        5fc5b4f
     smartconfig:9ec59b5
-    wpa:        5fc5b4f
+    wpa:        06675a3
-    wps:        5fc5b4f
+    wps:        06675a3

components/esp8266/source/esp_socket.c

@@ -0,0 +1,333 @@
+// Copyright 2018 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 <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/errno.h>
+
+#include "esp_socket.h"
+#include "net/sockio.h"
+
+#define CRITICAL_DECLARE(t)
+#define CRITICAL_ENTER(t)
+#define CRITICAL_EXIT(t)
+
+#ifndef ESP_SOCKET_MAX
+#define ESP_SOCKET_MAX 3
+#endif
+
+#define SET_ERR(err)
+
+#define CHECK_FD(s)                     \
+    if (s >= ESP_SOCKET_MAX             \
+        || !s_socket[s].info) {         \
+        SET_ERR(EINVAL)                 \
+        return -1;                      \
+    }
+
+#define CHECK_METHOD(s, io)             \
+    CHECK_FD(s)                         \
+    if (!s_socket[s].method             \
+        || !s_socket[s].method->io) {   \
+        SET_ERR(ESRCH);                 \
+        return -1;                      \
+    }
+
+#define SOCKET_IO_METHOD(s, io, ...)    \
+    s_socket[s].method->io(s_socket[s].index, ##__VA_ARGS__)
+
+/*
+ * socket event object
+ */
+typedef struct esp_socket_event {
+    esp_aio_cb_t                cb;
+    void                        *arg;
+} esp_socket_event_t;
+
+/*
+ * socket object
+ */
+typedef struct esp_socket {
+    esp_socket_info_t           *info;
+
+    /*
+     * lowlevel socket module index
+     */
+    void                        *index;
+
+    /*
+     * lowlevel socket module method
+     */
+    const esp_socket_method_t   *method;
+
+    esp_socket_event_t          event[ESP_SOCKET_MAX_EVENT];
+} esp_socket_t;
+
+static esp_socket_t s_socket[ESP_SOCKET_MAX];
+
+static inline int event_is_used(int s, int e)
+{
+    return s_socket[s].event[e].cb != NULL;
+}
+
+static inline int alloc_event(int s, int e)
+{
+    CRITICAL_DECLARE(t);
+
+    if (e >= ESP_SOCKET_MAX_EVENT)
+        return -1;
+
+    CRITICAL_ENTER(t);
+    if (event_is_used(s, e)) {
+        e = ESP_SOCKET_MAX_EVENT;
+    }
+    CRITICAL_EXIT(t);
+
+    return e < ESP_SOCKET_MAX_EVENT ? e : -1;
+}
+
+static inline void free_event(int s, int e)
+{
+    s_socket[s].event[e].cb = NULL;
+}
+
+static inline int alloc_socket(void)
+{
+    int s;
+    CRITICAL_DECLARE(t);
+
+    CRITICAL_ENTER(t);
+    for (s = 0; s < ESP_SOCKET_MAX; s++) {
+        if (s_socket[s].info == NULL) {
+            s_socket[s].info = (void *)1;
+            break;
+        }
+    }
+    CRITICAL_EXIT(t);
+
+    return s < ESP_SOCKET_MAX ? s : -1;
+}
+
+static inline void free_socket(int s)
+{
+    int e;
+
+    s_socket[s].info = NULL;
+    for (e = 0; e < ESP_SOCKET_MAX_EVENT; e++) {
+        free_event(s, e);
+    }
+}
+
+/*
+ * @brief create a socket file description
+ */
+int esp_socket(int domain, int type, int protocol)
+{
+    int s;
+
+    s = alloc_socket();
+    if (s < 0) {
+        SET_ERR(ENOMEM)
+        return -1;
+    }
+
+    s_socket[s].info = malloc(sizeof(esp_socket_info_t));
+    if (!s_socket[s].info) {
+        free_socket(s);
+        SET_ERR(ENOMEM)
+        return -1;
+    }
+
+    s_socket[s].info->domain = domain;
+    s_socket[s].info->type = type;
+    s_socket[s].info->protocol = protocol;
+
+    s_socket[s].index = NULL;
+    s_socket[s].method = NULL;
+
+    return s;
+}
+
+/*
+ * @brief send a block of data asynchronously and receive result by callback function
+ */
+int esp_aio_sendto(esp_aio_t *aio, const struct sockaddr_ll *to, socklen_t len)
+{
+    int s = aio->fd;
+
+    CHECK_METHOD(s, aio_sendto);
+
+    return SOCKET_IO_METHOD(s, aio_sendto, aio, to, len);
+}
+
+/*
+ * @brief register a event and its callback function to target of file description
+ */
+int esp_aio_event(int fd, unsigned int event, esp_aio_cb_t cb, void *arg)
+{
+    int e;
+    int ret;
+    int s = fd;
+
+    CHECK_METHOD(s, aio_event);
+
+    e = alloc_event(s, event);
+    if (e < 0) {
+        SET_ERR(ENOMEM)
+        return -1;
+    }
+
+    ret = SOCKET_IO_METHOD(s, aio_event, event, cb, arg);
+    if (ret) {
+        free_event(s, e);
+        return -1;
+    }
+
+    s_socket[s].event[e].cb = cb;
+    s_socket[s].event[e].arg = arg;
+
+    return 0;
+}
+
+/*
+ * @brief lowlevel socket module upload event and its data
+ */
+int esp_upload_event(void *index, esp_socket_info_t *info, unsigned int event, esp_aio_data_t *aio_data)
+{
+    int ret;
+    int s;
+
+    if (event >= ESP_SOCKET_MAX_EVENT)
+        return -EINVAL;
+
+    for (s = 0; s < ESP_SOCKET_MAX; s++) {
+        if (s_socket[s].index == index && event_is_used(s, event)) {
+            esp_aio_t aio;
+
+            aio.fd = s;
+            aio.cb = s_socket[s].event[event].cb;
+            aio.arg = s_socket[s].event[event].arg;
+
+            aio.pbuf = aio_data->pbuf;
+            aio.len = aio_data->len;
+            aio.ret = aio_data->status;
+
+            ret = s_socket[s].event[event].cb(&aio);
+            if (ret)
+                return ret;
+        }
+    }
+
+    return 0;
+}
+
+/*
+ * @brief free buffer taken from event callback
+ */
+int esp_free_pbuf(int fd, void *pbuf)
+{
+    int ret;
+    int s = fd;
+
+    CHECK_METHOD(s, free_pbuf);
+
+    ret = SOCKET_IO_METHOD(s, free_pbuf, pbuf);
+    if (ret)
+        return -1;
+
+    return 0; 
+}
+
+/*
+ * @brief map real lowlevel socket object to virtual socket
+ */
+static int map_socket_ll(int fd, const char *name)
+{
+    int s = fd;
+    const esp_socket_method_t *p;
+    extern const esp_socket_method_t __start_ksymatabesp_socket, __stop_ksymatabesp_socket;
+
+    for (p = &__start_ksymatabesp_socket; p != &__stop_ksymatabesp_socket; p++) {
+        if (!strcmp(name, p->name))
+            break;
+    }
+    if (p >= &__stop_ksymatabesp_socket) {
+        SET_ERR(ENXIO)
+        return -1;
+    }
+
+    s_socket[s].index = p->open(s_socket[s].info);
+    if (!s_socket[s].index)
+        return -1;
+    s_socket[s].method = p;
+
+    return 0;
+}
+
+/*
+ * @brief send requset command to target by file description and get the result synchronously
+ */
+int esp_ioctl(int fd, unsigned int cmd, ...)
+{
+    int ret;
+    va_list va;
+    int s = fd;
+
+    va_start(va, cmd);
+
+    switch(cmd) {
+#if SIOCGIFINDEX != SIOGIFINDEX
+        case SIOGIFINDEX:
+#endif
+        case SIOCGIFINDEX: {
+            const char *name;
+
+            name = va_arg(va, const char *);
+            ret = map_socket_ll(fd, name);
+            break;
+        }
+        default: {
+            int *arg = ((int *)&cmd) + 1;
+
+            CHECK_METHOD(s, ioctl);
+            ret = SOCKET_IO_METHOD(s, ioctl, cmd, arg);
+            break;
+        }
+    }
+
+    va_end(va);
+
+    return ret;
+}
+
+/*
+ * @brief close target of file description
+ */
+int esp_close(int fd)
+{
+    int ret;
+    int s = fd;
+
+    CHECK_METHOD(s, close);
+
+    ret = SOCKET_IO_METHOD(s, close);
+    if (ret)
+        return -1;
+
+    free(s_socket[s].info);
+    free_socket(s);
+
+    return 0;
+}

components/lwip/include/lwip/port/lwipopts.h

@@ -37,6 +37,8 @@
 #define SOCKETS_MT
 
 //#define SOCKETS_TCP_TRACE
+
+#define LWIP_SUPPORT_CUSTOM_PBUF    1
 /*
    -----------------------------------------------
    ---------- Platform specific locking ----------

components/lwip/lwip/src/include/lwip/lwip/pbuf.h

@@ -40,9 +40,11 @@
 extern "C" {
 #endif
 
+#ifndef LWIP_SUPPORT_CUSTOM_PBUF
 /** Currently, the pbuf_custom code is only needed for one specific configuration
  * of IP_FRAG */
 #define LWIP_SUPPORT_CUSTOM_PBUF (IP_FRAG && !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF)
+#endif
 
 /* @todo: We need a mechanism to prevent wasting memory in every pbuf
    (TCP vs. UDP, IPv4 vs. IPv6: UDP/IPv4 packets may waste up to 28 bytes) */

components/lwip/port/netif/ethernetif.c

@@ -18,7 +18,7 @@
 #include "esp_libc.h"
 #include "esp_wifi.h"
 #include "tcpip_adapter.h"
-
+#include "esp_socket.h"
 
 int8_t ieee80211_output_pbuf(uint8_t fd, uint8_t* dataptr, uint16_t datalen);
 int8_t wifi_get_netif(uint8_t fd);
@@ -54,6 +54,59 @@ static void low_level_init(struct netif* netif)
     /* Do whatever else is needed to initialize interface. */
 }
 
+/*
+ * @brief LWIP low-level AI/O sending callback function, it is to free pbuf
+ *
+ * @param aio AI/O control block pointer
+ *
+ * @return 0 meaning successs
+ */
+static int low_level_send_cb(esp_aio_t *aio)
+{
+    struct pbuf *pbuf = aio->arg;
+
+    pbuf_free(pbuf);
+
+    return 0;
+}
+
+/*
+ * @brief transform custom pbuf to LWIP core pbuf, LWIP may use input custom pbuf
+ *        to send ARP data directly
+ *
+ * @param pbuf LWIP pbuf pointer
+ *
+ * @return LWIP pbuf pointer which it not "PBUF_FLAG_IS_CUSTOM" attribute
+ */
+static inline struct pbuf *ethernetif_transform_pbuf(struct pbuf *pbuf)
+{
+    struct pbuf *p;
+
+    if (!(pbuf->flags & PBUF_FLAG_IS_CUSTOM)) {
+        /*
+         * Add ref to pbuf to avoid it to be freed by upper layer.
+         */
+        pbuf_ref(pbuf);
+        return pbuf;
+    }
+
+    p = pbuf_alloc(PBUF_RAW, pbuf->len, PBUF_RAM);
+    if (!p)
+        return NULL;
+
+    memcpy(p->payload, pbuf->payload, pbuf->len);
+
+    /*
+     * The input pbuf(named "pbuf") should not be freed, becasue it will be
+     * freed by upper layer.
+     * 
+     * The output pbuf(named "p") should not be freed either, becasue it will
+     * be freed at callback function "low_level_send_cb".
+     */
+
+    return p;
+}
+
 /**
  * This function should do the actual transmission of the packet. The packet is
  * contained in the pbuf that is passed to the function. This pbuf
@@ -72,6 +125,7 @@ static void low_level_init(struct netif* netif)
 
 static int8_t low_level_output(struct netif* netif, struct pbuf* p)
 {
+    esp_aio_t aio;
     int8_t err = ERR_OK;
 
     if (netif == NULL) {
@@ -83,20 +137,22 @@ static int8_t low_level_output(struct netif* netif, struct pbuf* p)
     pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
 #endif
 
-    uint8_t* outputbuf = (uint8_t*)os_malloc(p->len + 36);
+    p = ethernetif_transform_pbuf(p);
-    if (outputbuf == NULL) {
+    if (!p)
-        TCPIP_ATAPTER_LOG("ERROR no memory\n");
+        return ERR_OK;
-        return ERR_MEM;
-    }
 
-    outputbuf += 36;
+    aio.fd = (int)netif->state;
-    memcpy(outputbuf, p->payload, p->len);
+    aio.pbuf = p->payload;
+    aio.len = p->len;
+    aio.cb = low_level_send_cb;
+    aio.arg = p;
+    aio.ret = 0;
 
-    if (netif == esp_netif[TCPIP_ADAPTER_IF_STA]) {
+    /*
-        err = ieee80211_output_pbuf(TCPIP_ADAPTER_IF_STA, outputbuf, p->len);
+     * we use "SOCK_RAW" to create socket, so all input/output datas include full ethernet
-    } else {
+     * header, meaning we should not pass target low-level address here.
-        err = ieee80211_output_pbuf(TCPIP_ADAPTER_IF_AP, outputbuf, p->len);
+     */
-    }
+    err = esp_aio_sendto(&aio, NULL, 0);
 
     if (err == ERR_MEM) {
         err = ERR_OK;

components/tcpip_adapter/tcpip_adapter_wifi.c

@@ -21,6 +21,16 @@
 #include "esp_misc.h"
 #include "tcpip_adapter.h"
 #include "dhcpserver/dhcpserver.h"
+#include "net/sockio.h"
+#include "esp_socket.h"
+
+struct tcpip_adapter_pbuf {
+    struct pbuf_custom  pbuf;
+
+    void                *base;
+
+    struct netif        *netif;
+};
 
 /* Avoid warning. No header file has include these function */
 err_t ethernetif_init(struct netif* netif);
@@ -86,6 +96,90 @@ static void tcpip_adapter_station_dhcp_start()
     }
 }
 
+/*
+ * @brief LWIP custom pbuf callback function, it is to free custom pbuf
+ *
+ * @param p LWIP pbuf pointer
+ *
+ * @return none
+ */
+static void tcpip_adapter_free_pbuf(struct pbuf *p)
+{
+    struct tcpip_adapter_pbuf *pa = (struct tcpip_adapter_pbuf *)p;
+    int s = (int)pa->netif->state;
+
+    esp_free_pbuf(s, pa->base);
+    os_free(pa);
+}
+
+/*
+ * @brief TCPIP adapter AI/O recieve callback function, it is to recieve input data
+ *        and pass it to LWIP core
+ *
+ * @param aio AI/O control block pointer
+ *
+ * @return 0 if success or others if failed
+ */
+static int tcpip_adapter_recv_cb(struct esp_aio *aio)
+{
+    struct pbuf *pbuf = NULL;
+    struct tcpip_adapter_pbuf *p;
+    struct netif *netif = (struct netif *)aio->arg;
+
+    extern void ethernetif_input(struct netif *netif, struct pbuf *p);
+
+    p = os_malloc(sizeof(struct tcpip_adapter_pbuf));
+    if (!p)
+        return -ENOMEM;
+    p->pbuf.custom_free_function = tcpip_adapter_free_pbuf;
+    p->base = (void *)aio->pbuf;
+    p->netif = netif;
+
+    // PBUF_RAW means payload = (char *)aio->pbuf + offset(=0)
+    pbuf = pbuf_alloced_custom(PBUF_RAW, aio->len, PBUF_REF, &p->pbuf, (void *)aio->pbuf, aio->len);
+    if (!pbuf)
+        return -ENOMEM;
+
+    ethernetif_input(netif, pbuf);
+
+    return 0;
+}
+
+/*
+ * @brief create a "esp_socket" and bind it to target net card
+ *
+ * @param name net card name pointer
+ * @param netif LWIP net interface pointer
+ *
+ * @return 0 if success or others if failed
+ */
+static int tcpip_adapter_bind_netcard(const char *name, struct netif *netif)
+{
+    int s, ret;
+
+    s = esp_socket(AF_PACKET, SOCK_RAW, ETH_P_ALL);
+    if (s < 0) {
+        TCPIP_ATAPTER_LOG("create socket of (AF_PACKET, SOCK_RAW, ETH_P_ALL) error\n");
+        return -1;
+    }
+
+    ret = esp_ioctl(s, SIOCGIFINDEX, name);
+    if (ret) {
+        TCPIP_ATAPTER_LOG("bind socket %d to netcard %s error\n", s, name);
+        esp_close(s);
+        return -1;
+    }
+
+    ret = esp_aio_event(s, ESP_SOCKET_RECV_EVENT, tcpip_adapter_recv_cb, netif);
+    if (ret) {
+        TCPIP_ATAPTER_LOG("socket %d register receive callback function %p error\n", s, tcpip_adapter_recv_cb);
+        esp_close(s);
+        return -1;
+    }
+
+    return s;
+}
+
 void tcpip_adapter_start(uint8_t netif_index, bool authed)
 {
     if (!TCPIP_ADAPTER_IF_VALID(netif_index)) {
@@ -98,10 +192,20 @@ void tcpip_adapter_start(uint8_t netif_index, bool authed)
     if (netif_index == TCPIP_ADAPTER_IF_STA) {
         if (authed == 0) {
             if (esp_netif[netif_index] == NULL) {
+                int s;
+                const char *netcard_name = "sta0";
+
                 esp_netif[netif_index] = (struct netif*)os_zalloc(sizeof(*esp_netif[netif_index]));
                 TCPIP_ATAPTER_LOG("Malloc netif:%d\n", netif_index);
                 TCPIP_ATAPTER_LOG("Add netif:%d\n", netif_index);
-                netif_add(esp_netif[netif_index], NULL, NULL, NULL, NULL, ethernetif_init, tcpip_input);
+
+                s = tcpip_adapter_bind_netcard(netcard_name, esp_netif[netif_index]);
+                if (s < 0) {
+                    TCPIP_ATAPTER_LOG("TCPIP adapter bind net card %s error\n", netcard_name);
+                    return ;
+                }
+
+                netif_add(esp_netif[netif_index], NULL, NULL, NULL, (void *)s, ethernetif_init, tcpip_input);
             }
         } else {
             if ((esp_netif[netif_index]->flags & NETIF_FLAG_DHCP) == 0) {
@@ -131,10 +235,20 @@ void tcpip_adapter_start(uint8_t netif_index, bool authed)
         }
 
         if (esp_netif[netif_index] == NULL) {
+            int s;
+            const char *netcard_name = "ap0";
+
             TCPIP_ATAPTER_LOG("Malloc netif:%d\n", netif_index);
             esp_netif[netif_index] = (struct netif*)os_zalloc(sizeof(*esp_netif[netif_index]));
+
+            s = tcpip_adapter_bind_netcard(netcard_name, esp_netif[netif_index]);
+            if (s < 0) {
+                TCPIP_ATAPTER_LOG("TCPIP adapter bind net card %s error\n", netcard_name);
+                return ;
+            }
+
             netif_add(esp_netif[netif_index], &esp_ip[TCPIP_ADAPTER_IF_AP].ip,
-                      &esp_ip[TCPIP_ADAPTER_IF_AP].netmask, &esp_ip[TCPIP_ADAPTER_IF_AP].gw, NULL, ethernetif_init, tcpip_input);
+                      &esp_ip[TCPIP_ADAPTER_IF_AP].netmask, &esp_ip[TCPIP_ADAPTER_IF_AP].gw, (void *)s, ethernetif_init, tcpip_input);
         }
 
         if (dhcps_flag) {
@@ -178,31 +292,12 @@ void tcpip_adapter_stop(uint8_t netif_index)
     }
 
     TCPIP_ATAPTER_LOG("stop netif[%d]\n", netif_index);
+    esp_close((int)esp_netif[netif_index]->state);
     netif_remove(esp_netif[netif_index]);
     os_free(esp_netif[netif_index]);
     esp_netif[netif_index] = NULL;
 }
 
-void ieee80211_input(uint8_t netif_index, uint8_t* input, uint16_t len)
-{
-    struct pbuf* pb;
-
-    if (!TCPIP_ADAPTER_IF_VALID(netif_index)) {
-        TCPIP_ATAPTER_LOG("ERROR bad netif index:%d\n", netif_index);
-        return;
-    }
-
-    pb = pbuf_alloc(PBUF_MAC, len, PBUF_RAM);
-
-    if (pb == NULL) {
-        TCPIP_ATAPTER_LOG("ERROR NO MEMORY\n");
-        return;
-    }
-
-    memcpy((uint8_t*)(pb->payload), (uint8_t*)input, len);
-    ethernet_input(pb, esp_netif[netif_index]);
-}
-
 bool wifi_set_ip_info(WIFI_INTERFACE netif_index, struct ip_info* if_ip)
 {
     if (!TCPIP_ADAPTER_IF_VALID((uint8_t)netif_index)) {