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esp-idf/components/esp_netif/lwip/esp_netif_lwip_ppp.c

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/*
* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "esp_netif.h"
#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
#include "lwip/dns.h"
#include "netif/ppp/pppapi.h"
#include "netif/ppp/pppos.h"
#include "esp_log.h"
#include "esp_netif_net_stack.h"
#include "esp_event.h"
#include "esp_netif_ppp.h"
#include "esp_netif_lwip_internal.h"
#include <string.h>
#include "lwip/ip6_addr.h"
ESP_EVENT_DEFINE_BASE(NETIF_PPP_STATUS);
static const char *TAG = "esp-netif_lwip-ppp";
/**
* @brief internal lwip_ppp context struct extends the netif related data
* used to hold PPP netif related parameters
*/
typedef struct lwip_peer2peer_ctx {
netif_related_data_t base; // Generic portion of netif-related data
// PPP specific fields follow
bool ppp_phase_event_enabled;
bool ppp_error_event_enabled;
ppp_pcb *ppp;
} lwip_peer2peer_ctx_t;
#if PPP_SUPPORT && PPP_AUTH_SUPPORT
typedef struct {
struct tcpip_api_call_data call;
ppp_pcb *ppp;
u8_t authtype;
const char *user;
const char *passwd;
} set_auth_msg_t;
static err_t pppapi_do_ppp_set_auth(struct tcpip_api_call_data *m)
{
set_auth_msg_t *msg = (set_auth_msg_t *)m;
ppp_set_auth(msg->ppp, msg->authtype, msg->user, msg->passwd);
return ERR_OK;
}
static void pppapi_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd)
{
set_auth_msg_t msg = { .ppp = pcb, .authtype = authtype, .user = user, .passwd = passwd};
tcpip_api_call(pppapi_do_ppp_set_auth, &msg.call);
}
#endif // PPP_SUPPORT && PPP_AUTH_SUPPORT
/**
* @brief lwip callback from PPP client used here to produce PPP error related events,
* as well as some IP events
*/
static void on_ppp_status_changed(ppp_pcb *pcb, int err_code, void *ctx)
{
struct netif *pppif = ppp_netif(pcb);
const ip_addr_t *dest_ip = NULL;
esp_netif_t *netif = ctx;
ip_event_got_ip_t evt = {
.esp_netif = netif,
.if_index = -1,
};
esp_err_t err;
struct lwip_peer2peer_ctx *obj = (struct lwip_peer2peer_ctx*)netif->related_data;
assert(obj->base.netif_type == PPP_LWIP_NETIF);
esp_ip4_addr_t ns1;
esp_ip4_addr_t ns2;
switch (err_code) {
case PPPERR_NONE: /* Connected */
ESP_LOGI(TAG, "Connected");
if (pcb->if4_up && !ip_addr_isany(&pppif->ip_addr)) {
esp_netif_ip_info_t *ip_info = netif->ip_info;
ip4_addr_set(&ip_info->ip, ip_2_ip4(&pppif->ip_addr));
ip4_addr_set(&ip_info->netmask, ip_2_ip4(&pppif->netmask));
ip4_addr_set(&ip_info->gw, ip_2_ip4(&pppif->gw));
ip4_addr_set(&evt.ip_info.ip, ip_2_ip4(&pppif->ip_addr));
ip4_addr_set(&evt.ip_info.gw, ip_2_ip4(&pppif->gw));
ip4_addr_set(&evt.ip_info.netmask, ip_2_ip4(&pppif->netmask));
dest_ip = dns_getserver(0);
if(dest_ip != NULL){
ip4_addr_set(&ns1, ip_2_ip4(dest_ip));
}
dest_ip = dns_getserver(1);
if(dest_ip != NULL){
ip4_addr_set(&ns2, ip_2_ip4(dest_ip));
}
ESP_LOGI(TAG, "Name Server1: " IPSTR, IP2STR(&ns1));
ESP_LOGI(TAG, "Name Server2: " IPSTR, IP2STR(&ns2));
err = esp_event_post(IP_EVENT, netif->get_ip_event, &evt, sizeof(evt), 0);
if (ESP_OK != err) {
ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
}
return;
#if PPP_IPV6_SUPPORT
} else if (pcb->if6_up && !ip_addr_isany(&pppif->ip6_addr[0])) {
esp_netif_ip6_info_t ip6_info;
ip6_addr_t lwip_ip6_info;
ip_event_got_ip6_t ip6_event = { .esp_netif = pppif->state, .if_index = -1 };
ip6_addr_set(&lwip_ip6_info, ip_2_ip6(&pppif->ip6_addr[0]));
#if LWIP_IPV6_SCOPES
memcpy(&ip6_info.ip, &lwip_ip6_info, sizeof(esp_ip6_addr_t));
#else
memcpy(&ip6_info.ip, &lwip_ip6_info, sizeof(ip6_addr_t));
ip6_info.ip.zone = 0; // zero out zone, as not used in lwip
#endif /* LWIP_IPV6_SCOPES */
memcpy(&ip6_event.ip6_info, &ip6_info, sizeof(esp_netif_ip6_info_t));
ESP_LOGI(TAG, "Got IPv6 address " IPV6STR, IPV62STR(pppif->ip6_addr[0].u_addr.ip6));
err = esp_event_post(IP_EVENT, IP_EVENT_GOT_IP6, &ip6_event, sizeof(ip6_event), 0);
if (ESP_OK != err) {
ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
}
return;
#endif /* PPP_IPV6_SUPPORT */
} else {
ESP_LOGE(TAG, "Unexpected connected event");
return;
}
case PPPERR_PARAM:
ESP_LOGE(TAG, "Invalid parameter");
break;
case PPPERR_OPEN:
ESP_LOGE(TAG, "Unable to open PPP session");
break;
case PPPERR_DEVICE:
ESP_LOGE(TAG, "Invalid I/O device for PPP");
break;
case PPPERR_ALLOC:
ESP_LOGE(TAG, "Unable to allocate resources");
break;
case PPPERR_USER: /* User interrupt */
ESP_LOGI(TAG, "User interrupt");
break;
case PPPERR_CONNECT: /* Connection lost */
ESP_LOGI(TAG, "Connection lost");
err = esp_event_post(IP_EVENT, netif->lost_ip_event, &evt, sizeof(evt), 0);
if (ESP_OK != err) {
ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
}
return;
case PPPERR_AUTHFAIL:
ESP_LOGE(TAG, "Failed authentication challenge");
break;
case PPPERR_PROTOCOL:
ESP_LOGE(TAG, "Failed to meet protocol");
break;
case PPPERR_PEERDEAD:
ESP_LOGE(TAG, "Connection timeout");
break;
case PPPERR_IDLETIMEOUT:
ESP_LOGE(TAG, "Idle Timeout");
break;
case PPPERR_CONNECTTIME:
ESP_LOGE(TAG, "Max connect time reached");
break;
case PPPERR_LOOPBACK:
ESP_LOGE(TAG, "Loopback detected");
break;
default:
ESP_LOGE(TAG, "Unknown error code %d", err_code);
break;
}
if (obj->ppp_error_event_enabled) {
err = esp_event_post(NETIF_PPP_STATUS, err_code, &netif, sizeof(netif), 0);
if (err != ESP_OK) {
ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
}
}
}
#if PPP_NOTIFY_PHASE
/**
* @brief Notify phase callback which is called on each PPP internal state change
*
* @param pcb PPP control block
* @param phase Phase ID
* @param ctx Context of callback
*/
static void on_ppp_notify_phase(ppp_pcb *pcb, u8_t phase, void *ctx)
{
switch (phase) {
case PPP_PHASE_DEAD:
ESP_LOGD(TAG, "Phase Dead");
break;
case PPP_PHASE_INITIALIZE:
ESP_LOGD(TAG, "Phase Start");
break;
case PPP_PHASE_ESTABLISH:
ESP_LOGD(TAG, "Phase Establish");
break;
case PPP_PHASE_AUTHENTICATE:
ESP_LOGD(TAG, "Phase Authenticate");
break;
case PPP_PHASE_NETWORK:
ESP_LOGD(TAG, "Phase Network");
break;
case PPP_PHASE_RUNNING:
ESP_LOGD(TAG, "Phase Running");
break;
case PPP_PHASE_TERMINATE:
ESP_LOGD(TAG, "Phase Terminate");
break;
case PPP_PHASE_DISCONNECT:
ESP_LOGD(TAG, "Phase Disconnect");
break;
default:
ESP_LOGW(TAG, "Phase Unknown: %d", phase);
break;
}
esp_netif_t *netif = ctx;
lwip_peer2peer_ctx_t *obj = (lwip_peer2peer_ctx_t *)netif->related_data;
assert(obj->base.netif_type == PPP_LWIP_NETIF);
if (obj && obj->ppp_phase_event_enabled) {
esp_err_t err = esp_event_post(NETIF_PPP_STATUS, NETIF_PP_PHASE_OFFSET + phase, &netif, sizeof(netif), 0);
if (err != ESP_OK) {
ESP_LOGE(TAG, "esp_event_post failed with code %d", err);
}
}
}
#endif // PPP_NOTIFY_PHASE
/**
* @brief PPP low level output callback used to transmit data using standard esp-netif interafce
*
* @param pcb PPP control block
* @param data Buffer to write to serial port
* @param len Length of the data buffer
* @param ctx Context of callback
*
* @return uint32_t Length of data successfully sent
*/
static uint32_t pppos_low_level_output(ppp_pcb *pcb, uint8_t *data, uint32_t len, void *netif)
{
esp_err_t ret = esp_netif_transmit(netif, data, len);
if (ret == ESP_OK) {
return len;
}
return 0;
}
esp_err_t esp_netif_ppp_set_auth(esp_netif_t *netif, esp_netif_auth_type_t authtype, const char *user, const char *passwd)
{
if (!_IS_NETIF_POINT2POINT_TYPE(netif, PPP_LWIP_NETIF)) {
return ESP_ERR_ESP_NETIF_INVALID_PARAMS;
}
#if PPP_AUTH_SUPPORT
lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif->related_data;
assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
pppapi_set_auth(ppp_ctx->ppp, authtype, user, passwd);
return ESP_OK;
#else
ESP_LOGE(TAG, "%s failed: No authorisation enabled in menuconfig", __func__);
return ESP_ERR_ESP_NETIF_IF_NOT_READY;
#endif
}
void esp_netif_ppp_set_default_netif(netif_related_data_t *netif_related)
{
lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
ppp_set_default(ppp_ctx->ppp);
}
netif_related_data_t * esp_netif_new_ppp(esp_netif_t *esp_netif, const esp_netif_netstack_config_t *esp_netif_stack_config)
{
struct netif * netif_impl = esp_netif->lwip_netif;
struct lwip_peer2peer_ctx * ppp_obj = calloc(1, sizeof(struct lwip_peer2peer_ctx));
if (ppp_obj == NULL) {
ESP_LOGE(TAG, "%s: cannot allocate lwip_ppp_ctx", __func__);
return NULL;
}
// Setup the generic esp-netif fields
ppp_obj->base.is_point2point = true;
ppp_obj->base.netif_type = PPP_LWIP_NETIF;
ppp_obj->ppp = pppapi_pppos_create(netif_impl, pppos_low_level_output, on_ppp_status_changed, esp_netif);
ESP_LOGD(TAG, "%s: PPP connection created: %p", __func__, ppp_obj->ppp);
if (!ppp_obj->ppp) {
ESP_LOGE(TAG, "%s: lwIP PPP connection cannot be created", __func__);
}
// Set the related data here, since the phase callback could be triggered before this function exits
esp_netif->related_data = (netif_related_data_t *)ppp_obj;
#if PPP_NOTIFY_PHASE
ppp_set_notify_phase_callback(ppp_obj->ppp, on_ppp_notify_phase);
#endif
ppp_set_usepeerdns(ppp_obj->ppp, 1);
return (netif_related_data_t *)ppp_obj;
}
esp_err_t esp_netif_start_ppp(esp_netif_t *esp_netif)
{
netif_related_data_t *netif_related = esp_netif->related_data;
lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
ESP_LOGD(TAG, "%s: Starting PPP connection: %p", __func__, ppp_ctx->ppp);
esp_err_t err = pppapi_connect(ppp_ctx->ppp, 0);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: PPP connection cannot be started", __func__);
if (ppp_ctx->ppp_error_event_enabled) {
esp_event_post(NETIF_PPP_STATUS, NETIF_PPP_CONNECT_FAILED, esp_netif, sizeof(esp_netif), 0);
}
return ESP_FAIL;
}
return ESP_OK;
}
void esp_netif_lwip_ppp_input(void *ppp_ctx, void *buffer, size_t len, void *eb)
{
struct lwip_peer2peer_ctx * obj = ppp_ctx;
err_t ret = pppos_input_tcpip(obj->ppp, buffer, len);
if (ret != ERR_OK) {
ESP_LOGE(TAG, "pppos_input_tcpip failed with %d", ret);
}
}
esp_err_t esp_netif_stop_ppp(netif_related_data_t *netif_related)
{
lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
ESP_LOGD(TAG, "%s: Stopped PPP connection: %p", __func__, ppp_ctx->ppp);
err_t ret = pppapi_close(ppp_ctx->ppp, 0);
if (ret != ERR_OK) {
ESP_LOGE(TAG, "pppapi_close failed with %d", ret);
return ESP_FAIL;
}
return ESP_OK;
}
void esp_netif_destroy_ppp(netif_related_data_t *netif_related)
{
lwip_peer2peer_ctx_t *ppp_ctx = (lwip_peer2peer_ctx_t *)netif_related;
assert(ppp_ctx->base.netif_type == PPP_LWIP_NETIF);
pppapi_free(ppp_ctx->ppp);
free(netif_related);
}
esp_err_t esp_netif_ppp_set_params(esp_netif_t *netif, const esp_netif_ppp_config_t *config)
{
if (netif == NULL || netif->related_data == NULL || config == NULL ||
((struct lwip_peer2peer_ctx *)netif->related_data)->base.netif_type != PPP_LWIP_NETIF) {
return ESP_ERR_INVALID_ARG;
}
struct lwip_peer2peer_ctx *obj = (struct lwip_peer2peer_ctx *)netif->related_data;
obj->ppp_phase_event_enabled = config->ppp_phase_event_enabled;
obj->ppp_error_event_enabled = config->ppp_error_event_enabled;
return ESP_OK;
}
esp_err_t esp_netif_ppp_get_params(esp_netif_t *netif, esp_netif_ppp_config_t *config)
{
if (netif == NULL || netif->related_data == NULL || config == NULL ||
((struct lwip_peer2peer_ctx *)netif->related_data)->base.netif_type != PPP_LWIP_NETIF) {
return ESP_ERR_INVALID_ARG;
}
struct lwip_peer2peer_ctx *obj = (struct lwip_peer2peer_ctx *)netif->related_data;
config->ppp_phase_event_enabled = obj->ppp_phase_event_enabled;
config->ppp_error_event_enabled = obj->ppp_error_event_enabled;
return ESP_OK;
}
#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */
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