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https://github.com/espressif/esp-idf.git
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353 lines
12 KiB
C
353 lines
12 KiB
C
// Copyright 2019 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 "esp_netif.h"
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#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
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#include "lwip/dns.h"
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#include "netif/ppp/pppapi.h"
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#include "netif/ppp/pppos.h"
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#include "esp_log.h"
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#include "esp_netif_net_stack.h"
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#include "esp_event.h"
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#include "esp_netif_ppp.h"
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#include "esp_netif_lwip_internal.h"
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#include <string.h>
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#include "lwip/ip6_addr.h"
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ESP_EVENT_DEFINE_BASE(NETIF_PPP_STATUS);
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static const char *TAG = "esp-netif_lwip-ppp";
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/**
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* @brief internal lwip_ppp context struct extends the netif related data
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* used to hold PPP netif related parameters
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*/
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typedef struct lwip_peer2peer_ctx {
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netif_related_data_t base; // Generic portion of netif-related data
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// PPP specific fields follow
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bool ppp_phase_event_enabled;
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bool ppp_error_event_enabled;
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ppp_pcb *ppp;
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} lwip_peer2peer_ctx_t;
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/**
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* @brief lwip callback from PPP client used here to produce PPP error related events,
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* as well as some IP events
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*/
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static void on_ppp_status_changed(ppp_pcb *pcb, int err_code, void *ctx)
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{
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struct netif *pppif = ppp_netif(pcb);
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const ip_addr_t *dest_ip = NULL;
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esp_netif_t *netif = ctx;
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ip_event_got_ip_t evt = {
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.esp_netif = netif,
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.if_index = -1,
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};
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esp_err_t err;
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struct lwip_peer2peer_ctx *obj = (struct lwip_peer2peer_ctx*)netif->related_data;
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assert(obj->base.netif_type == PPP_LWIP_NETIF);
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esp_ip4_addr_t ns1;
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esp_ip4_addr_t ns2;
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switch (err_code) {
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case PPPERR_NONE: /* Connected */
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ESP_LOGI(TAG, "Connected");
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if (pcb->if4_up && !ip_addr_isany(&pppif->ip_addr)) {
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esp_netif_ip_info_t *ip_info = netif->ip_info;
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ip4_addr_set(&ip_info->ip, ip_2_ip4(&pppif->ip_addr));
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ip4_addr_set(&ip_info->netmask, ip_2_ip4(&pppif->netmask));
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ip4_addr_set(&ip_info->gw, ip_2_ip4(&pppif->gw));
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ip4_addr_set(&evt.ip_info.ip, ip_2_ip4(&pppif->ip_addr));
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ip4_addr_set(&evt.ip_info.gw, ip_2_ip4(&pppif->gw));
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ip4_addr_set(&evt.ip_info.netmask, ip_2_ip4(&pppif->netmask));
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dest_ip = dns_getserver(0);
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if(dest_ip != NULL){
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ip4_addr_set(&ns1, ip_2_ip4(dest_ip));
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}
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dest_ip = dns_getserver(1);
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if(dest_ip != NULL){
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ip4_addr_set(&ns2, ip_2_ip4(dest_ip));
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}
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ESP_LOGI(TAG, "Name Server1: " IPSTR, IP2STR(&ns1));
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ESP_LOGI(TAG, "Name Server2: " IPSTR, IP2STR(&ns2));
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err = esp_event_post(IP_EVENT, netif->get_ip_event, &evt, sizeof(evt), 0);
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if (ESP_OK != err) {
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ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
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}
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return;
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#if PPP_IPV6_SUPPORT
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} else if (pcb->if6_up && !ip_addr_isany(&pppif->ip6_addr[0])) {
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esp_netif_ip6_info_t ip6_info;
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ip6_addr_t lwip_ip6_info;
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ip_event_got_ip6_t ip6_event = { .esp_netif = pppif->state, .if_index = -1 };
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ip6_addr_set(&lwip_ip6_info, ip_2_ip6(&pppif->ip6_addr[0]));
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#if LWIP_IPV6_SCOPES
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memcpy(&ip6_info.ip, &lwip_ip6_info, sizeof(esp_ip6_addr_t));
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#else
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memcpy(&ip6_info.ip, &lwip_ip6_info, sizeof(ip6_addr_t));
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ip6_info.ip.zone = 0; // zero out zone, as not used in lwip
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#endif /* LWIP_IPV6_SCOPES */
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memcpy(&ip6_event.ip6_info, &ip6_info, sizeof(esp_netif_ip6_info_t));
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ESP_LOGI(TAG, "Got IPv6 address " IPV6STR, IPV62STR(pppif->ip6_addr[0].u_addr.ip6));
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err = esp_event_post(IP_EVENT, IP_EVENT_GOT_IP6, &ip6_event, sizeof(ip6_event), 0);
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if (ESP_OK != err) {
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ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
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}
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return;
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#endif /* PPP_IPV6_SUPPORT */
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} else {
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ESP_LOGE(TAG, "Unexpected connected event");
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return;
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}
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case PPPERR_PARAM:
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ESP_LOGE(TAG, "Invalid parameter");
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break;
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case PPPERR_OPEN:
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ESP_LOGE(TAG, "Unable to open PPP session");
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break;
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case PPPERR_DEVICE:
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ESP_LOGE(TAG, "Invalid I/O device for PPP");
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break;
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case PPPERR_ALLOC:
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ESP_LOGE(TAG, "Unable to allocate resources");
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break;
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case PPPERR_USER: /* User interrupt */
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ESP_LOGI(TAG, "User interrupt");
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break;
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case PPPERR_CONNECT: /* Connection lost */
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ESP_LOGI(TAG, "Connection lost");
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err = esp_event_post(IP_EVENT, netif->lost_ip_event, &evt, sizeof(evt), 0);
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if (ESP_OK != err) {
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ESP_LOGE(TAG, "esp_event_send_internal failed with code %d", err);
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}
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return;
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case PPPERR_AUTHFAIL:
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ESP_LOGE(TAG, "Failed authentication challenge");
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break;
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case PPPERR_PROTOCOL:
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ESP_LOGE(TAG, "Failed to meet protocol");
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break;
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case PPPERR_PEERDEAD:
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ESP_LOGE(TAG, "Connection timeout");
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break;
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case PPPERR_IDLETIMEOUT:
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ESP_LOGE(TAG, "Idle Timeout");
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break;
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case PPPERR_CONNECTTIME:
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ESP_LOGE(TAG, "Max connect time reached");
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break;
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case PPPERR_LOOPBACK:
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ESP_LOGE(TAG, "Loopback detected");
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break;
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default:
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ESP_LOGE(TAG, "Unknown error code %d", err_code);
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break;
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}
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if (obj->ppp_error_event_enabled) {
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err = esp_event_post(NETIF_PPP_STATUS, err_code, &netif, sizeof(netif), 0);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
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}
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}
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}
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#if PPP_NOTIFY_PHASE
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/**
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* @brief Notify phase callback which is called on each PPP internal state change
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*
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* @param pcb PPP control block
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* @param phase Phase ID
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* @param ctx Context of callback
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*/
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static void on_ppp_notify_phase(ppp_pcb *pcb, u8_t phase, void *ctx)
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{
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switch (phase) {
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case PPP_PHASE_DEAD:
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ESP_LOGD(TAG, "Phase Dead");
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break;
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case PPP_PHASE_INITIALIZE:
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ESP_LOGD(TAG, "Phase Start");
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break;
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case PPP_PHASE_ESTABLISH:
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ESP_LOGD(TAG, "Phase Establish");
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break;
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case PPP_PHASE_AUTHENTICATE:
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ESP_LOGD(TAG, "Phase Authenticate");
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break;
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case PPP_PHASE_NETWORK:
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ESP_LOGD(TAG, "Phase Network");
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break;
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case PPP_PHASE_RUNNING:
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ESP_LOGD(TAG, "Phase Running");
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break;
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case PPP_PHASE_TERMINATE:
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ESP_LOGD(TAG, "Phase Terminate");
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break;
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case PPP_PHASE_DISCONNECT:
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ESP_LOGD(TAG, "Phase Disconnect");
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break;
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default:
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ESP_LOGW(TAG, "Phase Unknown: %d", phase);
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break;
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}
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esp_netif_t *netif = ctx;
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lwip_peer2peer_ctx_t *obj = (lwip_peer2peer_ctx_t *)netif->related_data;
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assert(obj->base.netif_type == PPP_LWIP_NETIF);
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if (obj && obj->ppp_phase_event_enabled) {
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esp_err_t err = esp_event_post(NETIF_PPP_STATUS, NETIF_PP_PHASE_OFFSET + phase, &netif, sizeof(netif), 0);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
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}
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}
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}
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#endif // PPP_NOTIFY_PHASE
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/**
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* @brief PPP low level output callback used to transmit data using standard esp-netif interafce
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*
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* @param pcb PPP control block
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* @param data Buffer to write to serial port
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* @param len Length of the data buffer
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* @param ctx Context of callback
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*
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* @return uint32_t Length of data successfully sent
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*/
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static uint32_t pppos_low_level_output(ppp_pcb *pcb, uint8_t *data, uint32_t len, void *netif)
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{
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esp_err_t ret = esp_netif_transmit(netif, data, len);
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if (ret == ESP_OK) {
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return len;
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}
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return 0;
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}
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esp_err_t esp_netif_ppp_set_auth(esp_netif_t *netif, esp_netif_auth_type_t authtype, const char *user, const char *passwd)
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{
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if (!_IS_NETIF_POINT2POINT_TYPE(netif, PPP_LWIP_NETIF)) {
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return ESP_ERR_ESP_NETIF_INVALID_PARAMS;
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}
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#if PPP_AUTH_SUPPORT
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lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif->related_data;
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assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
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pppapi_set_auth(ppp_ctx->ppp, authtype, user, passwd);
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return ESP_OK;
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#else
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ESP_LOGE(TAG, "%s failed: No authorisation enabled in menuconfig", __func__);
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return ESP_ERR_ESP_NETIF_IF_NOT_READY;
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#endif
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}
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void esp_netif_ppp_set_default_netif(netif_related_data_t *netif_related)
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{
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lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
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assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
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ppp_set_default(ppp_ctx->ppp);
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}
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netif_related_data_t * esp_netif_new_ppp(esp_netif_t *esp_netif, const esp_netif_netstack_config_t *esp_netif_stack_config)
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{
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struct netif * netif_impl = esp_netif->lwip_netif;
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struct lwip_peer2peer_ctx * ppp_obj = calloc(1, sizeof(struct lwip_peer2peer_ctx));
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if (ppp_obj == NULL) {
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ESP_LOGE(TAG, "%s: cannot allocate lwip_ppp_ctx", __func__);
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return NULL;
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}
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// Setup the generic esp-netif fields
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ppp_obj->base.is_point2point = true;
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ppp_obj->base.netif_type = PPP_LWIP_NETIF;
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ppp_obj->ppp = pppapi_pppos_create(netif_impl, pppos_low_level_output, on_ppp_status_changed, esp_netif);
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ESP_LOGD(TAG, "%s: PPP connection created: %p", __func__, ppp_obj->ppp);
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if (!ppp_obj->ppp) {
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ESP_LOGE(TAG, "%s: lwIP PPP connection cannot be created", __func__);
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}
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// Set the related data here, since the phase callback could be triggered before this function exits
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esp_netif->related_data = (netif_related_data_t *)ppp_obj;
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#if PPP_NOTIFY_PHASE
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ppp_set_notify_phase_callback(ppp_obj->ppp, on_ppp_notify_phase);
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#endif
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ppp_set_usepeerdns(ppp_obj->ppp, 1);
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return (netif_related_data_t *)ppp_obj;
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}
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esp_err_t esp_netif_start_ppp(netif_related_data_t *netif_related)
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{
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lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
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assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
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ESP_LOGD(TAG, "%s: Starting PPP connection: %p", __func__, ppp_ctx->ppp);
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esp_err_t err = pppapi_connect(ppp_ctx->ppp, 0);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: PPP connection cannot be started", __func__);
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return ESP_FAIL;
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}
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return ESP_OK;
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}
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void esp_netif_lwip_ppp_input(void *ppp_ctx, void *buffer, size_t len, void *eb)
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{
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struct lwip_peer2peer_ctx * obj = ppp_ctx;
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err_t ret = pppos_input_tcpip(obj->ppp, buffer, len);
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if (ret != ERR_OK) {
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ESP_LOGE(TAG, "pppos_input_tcpip failed with %d", ret);
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}
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}
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esp_err_t esp_netif_stop_ppp(netif_related_data_t *netif_related)
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{
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lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
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assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
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ESP_LOGD(TAG, "%s: Stopped PPP connection: %p", __func__, ppp_ctx->ppp);
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err_t ret = pppapi_close(ppp_ctx->ppp, 0);
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if (ret != ERR_OK) {
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ESP_LOGE(TAG, "pppapi_close failed with %d", ret);
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return ESP_FAIL;
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}
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return ESP_OK;
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}
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void esp_netif_destroy_ppp(netif_related_data_t *netif_related)
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{
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lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
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assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
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pppapi_free(ppp_ctx->ppp);
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free(netif_related);
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}
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esp_err_t esp_netif_ppp_set_params(esp_netif_t *netif, const esp_netif_ppp_config_t *config)
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{
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struct lwip_peer2peer_ctx *obj = (struct lwip_peer2peer_ctx *)netif->related_data;
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obj->ppp_phase_event_enabled = config->ppp_phase_event_enabled;
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obj->ppp_error_event_enabled = config->ppp_error_event_enabled;
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return ESP_OK;
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}
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#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */
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