mirror of
https://github.com/espressif/ESP8266_RTOS_SDK.git
synced 2025-05-22 17:47:04 +08:00
310 lines
8.3 KiB
C
310 lines
8.3 KiB
C
// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "lwip/pbuf.h"
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#include "lwip/ethip6.h"
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#include "netif/etharp.h"
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#include "esp_libc.h"
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#include "esp_wifi.h"
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#include "tcpip_adapter.h"
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#include "esp_socket.h"
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int8_t ieee80211_output_pbuf(uint8_t fd, uint8_t* dataptr, uint16_t datalen);
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int8_t wifi_get_netif(uint8_t fd);
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void wifi_station_set_default_hostname(uint8_t* hwaddr);
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/**
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* In this function, the hardware should be initialized.
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* Called from ethernetif_init().
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*
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* @param netif the already initialized lwip network interface structure
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* for this ethernetif
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*/
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static void low_level_init(struct netif* netif)
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{
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if (netif == NULL) {
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TCPIP_ATAPTER_LOG("ERROR netif is NULL\n");
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return;
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}
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/* set MAC hardware address length */
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netif->hwaddr_len = ETHARP_HWADDR_LEN;
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/* maximum transfer unit */
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netif->mtu = 1500;
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/* device capabilities */
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/* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
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netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP | NETIF_FLAG_UP;
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#if LWIP_IGMP
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netif->flags |= NETIF_FLAG_IGMP;
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#endif
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/* Do whatever else is needed to initialize interface. */
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}
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/*
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* @brief LWIP low-level AI/O sending callback function, it is to free pbuf
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*
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* @param aio AI/O control block pointer
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*
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* @return 0 meaning successs
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*/
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static int low_level_send_cb(esp_aio_t *aio)
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{
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struct pbuf *pbuf = aio->arg;
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pbuf_free(pbuf);
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return 0;
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}
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/*
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* @brief transform custom pbuf to LWIP core pbuf, LWIP may use input custom pbuf
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* to send ARP data directly
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*
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* @param pbuf LWIP pbuf pointer
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*
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* @return LWIP pbuf pointer which it not "PBUF_FLAG_IS_CUSTOM" attribute
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*/
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static inline struct pbuf *ethernetif_transform_pbuf(struct pbuf *pbuf)
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{
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struct pbuf *p;
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if (!(pbuf->flags & PBUF_FLAG_IS_CUSTOM)) {
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/*
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* Add ref to pbuf to avoid it to be freed by upper layer.
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*/
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pbuf_ref(pbuf);
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return pbuf;
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}
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p = pbuf_alloc(PBUF_RAW, pbuf->len, PBUF_RAM);
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if (!p)
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return NULL;
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memcpy(p->payload, pbuf->payload, pbuf->len);
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/*
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* The input pbuf(named "pbuf") should not be freed, becasue it will be
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* freed by upper layer.
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*
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* The output pbuf(named "p") should not be freed either, becasue it will
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* be freed at callback function "low_level_send_cb".
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*/
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return p;
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}
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/**
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* This function should do the actual transmission of the packet. The packet is
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* contained in the pbuf that is passed to the function. This pbuf
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* might be chained.
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
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* @return ERR_OK if the packet could be sent
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* an int8_t value if the packet couldn't be sent
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*
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* @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
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* strange results. You might consider waiting for space in the DMA queue
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* to become availale since the stack doesn't retry to send a packet
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* dropped because of memory failure (except for the TCP timers).
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*/
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static int8_t low_level_output(struct netif* netif, struct pbuf* p)
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{
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esp_aio_t aio;
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int8_t err = ERR_OK;
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if (netif == NULL) {
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TCPIP_ATAPTER_LOG("ERROR netif is NULL\n");
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return ERR_ARG;
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}
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#if ETH_PAD_SIZE
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pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
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#endif
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p = ethernetif_transform_pbuf(p);
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if (!p)
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return ERR_OK;
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aio.fd = (int)netif->state;
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aio.pbuf = p->payload;
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aio.len = p->len;
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aio.cb = low_level_send_cb;
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aio.arg = p;
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aio.ret = 0;
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/*
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* we use "SOCK_RAW" to create socket, so all input/output datas include full ethernet
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* header, meaning we should not pass target low-level address here.
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*/
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err = esp_aio_sendto(&aio, NULL, 0);
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if (err == ERR_MEM) {
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err = ERR_OK;
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}
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// signal that packet should be sent();
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#if ETH_PAD_SIZE
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pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
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#endif
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#if LWIP_STATS
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LINK_STATS_INC(link.xmit);
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#endif
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return err;
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}
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/**
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* This function should be called when a packet is ready to be read
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* from the interface. It uses the function low_level_input() that
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* should handle the actual reception of bytes from the network
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* interface. Then the type of the received packet is determined and
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* the appropriate input function is called.
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*
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* @param netif the lwip network interface structure for this ethernetif
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*/
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void ethernetif_input(struct netif* netif, struct pbuf* p)
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{
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struct eth_hdr* ethhdr;
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if (p == NULL) {
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TCPIP_ATAPTER_LOG("ERROR pbuf is NULL\n");
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goto _exit;
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}
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if (p->payload == NULL) {
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TCPIP_ATAPTER_LOG("ERROR payload is NULL\n");
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pbuf_free(p);
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goto _exit;
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}
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if (netif == NULL) {
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TCPIP_ATAPTER_LOG("ERROR netif is NULL\n");
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goto _exit;
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}
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if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
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TCPIP_ATAPTER_LOG("ERROR netif is not up\n");
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pbuf_free(p);
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p = NULL;
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goto _exit;
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}
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/* points to packet payload, which starts with an Ethernet header */
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ethhdr = p->payload;
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switch (htons(ethhdr->type)) {
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/* IP or ARP packet? */
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case ETHTYPE_IP:
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case ETHTYPE_IPV6:
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case ETHTYPE_ARP:
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#if PPPOE_SUPPORT
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/* PPPoE packet? */
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case ETHTYPE_PPPOEDISC:
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case ETHTYPE_PPPOE:
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#endif /* PPPOE_SUPPORT */
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/* full packet send to tcpip_thread to process */
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if (netif->input(p, netif) != ERR_OK) {
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TCPIP_ATAPTER_LOG("ERROR IP input error\n");
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pbuf_free(p);
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p = NULL;
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}
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break;
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default:
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pbuf_free(p);
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p = NULL;
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break;
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}
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_exit:
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;
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}
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/**
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* Should be called at the beginning of the program to set up the
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* network interface. It calls the function low_level_init() to do the
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* actual setup of the hardware.
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*
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* This function should be passed as a parameter to netif_add().
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*
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* @param netif the lwip network interface structure for this ethernetif
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* @return ERR_OK if the loopif is initialized
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* ERR_MEM if private data couldn't be allocated
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* any other int8_t on error
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*/
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int8_t ethernetif_init(struct netif* netif)
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{
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uint8_t mac[NETIF_MAX_HWADDR_LEN];
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if (netif == NULL) {
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TCPIP_ATAPTER_LOG("ERROR netif is NULL\n");
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}
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/* set MAC hardware address */
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if (wifi_get_netif(TCPIP_ADAPTER_IF_STA) == TCPIP_ADAPTER_IF_STA) {
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wifi_get_macaddr(TCPIP_ADAPTER_IF_STA, mac);
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} else {
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wifi_get_macaddr(TCPIP_ADAPTER_IF_AP, mac);
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}
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memcpy(netif->hwaddr, mac, NETIF_MAX_HWADDR_LEN);
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#if LWIP_NETIF_HOSTNAME
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if (wifi_get_netif(TCPIP_ADAPTER_IF_STA) == TCPIP_ADAPTER_IF_STA) {
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if (default_hostname == 1) {
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wifi_station_set_default_hostname(netif->hwaddr);
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}
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/* Initialize interface hostname */
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netif->hostname = hostname;
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} else {
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netif->hostname = NULL;
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}
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#endif /* LWIP_NETIF_HOSTNAME */
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/*
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* Initialize the snmp variables and counters inside the struct netif.
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* The last argument should be replaced with your link speed, in units
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* of bits per second.
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*/
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netif->name[0] = IFNAME0;
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netif->name[1] = IFNAME1;
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/* We directly use etharp_output() here to save a function call.
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* You can instead declare your own function an call etharp_output()
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* from it if you have to do some checks before sending (e.g. if link
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* is available...) */
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netif->output = etharp_output;
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#if LWIP_IPV6
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netif->output_ip6 = ethip6_output;
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#endif /* LWIP_IPV6 */
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netif->linkoutput = low_level_output;
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/* initialize the hardware */
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low_level_init(netif);
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return ERR_OK;
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}
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