mirror of
https://github.com/espressif/esp-idf.git
synced 2025-10-31 13:09:38 +00:00
554 lines
18 KiB
C
554 lines
18 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include "esp_tls.h"
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#include "esp_log.h"
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#include "esp_transport.h"
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#include "esp_transport_ssl.h"
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#include "esp_transport_internal.h"
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#define INVALID_SOCKET (-1)
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#define GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t) \
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transport_esp_tls_t *ssl = ssl_get_context_data(t); \
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if (!ssl) { return; }
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static const char *TAG = "transport_base";
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typedef enum {
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TRANS_SSL_INIT = 0,
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TRANS_SSL_CONNECTING,
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} transport_ssl_conn_state_t;
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/**
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* mbedtls specific transport data
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*/
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typedef struct transport_esp_tls {
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esp_tls_t *tls;
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esp_tls_cfg_t cfg;
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bool ssl_initialized;
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transport_ssl_conn_state_t conn_state;
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int sockfd;
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} transport_esp_tls_t;
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/**
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* @brief Destroys esp-tls transport used in the foundation transport
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*
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* @param[in] transport esp-tls handle
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*/
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void esp_transport_esp_tls_destroy(struct transport_esp_tls* transport_esp_tls);
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static inline transport_esp_tls_t *ssl_get_context_data(esp_transport_handle_t t)
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{
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if (!t) {
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return NULL;
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}
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return (transport_esp_tls_t *)t->data;
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}
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static int esp_tls_connect_async(esp_transport_handle_t t, const char *host, int port, int timeout_ms, bool is_plain_tcp)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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if (ssl->conn_state == TRANS_SSL_INIT) {
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ssl->cfg.timeout_ms = timeout_ms;
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ssl->cfg.is_plain_tcp = is_plain_tcp;
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ssl->cfg.non_block = true;
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ssl->ssl_initialized = true;
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ssl->tls = esp_tls_init();
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if (!ssl->tls) {
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return -1;
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}
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ssl->conn_state = TRANS_SSL_CONNECTING;
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ssl->sockfd = INVALID_SOCKET;
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}
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if (ssl->conn_state == TRANS_SSL_CONNECTING) {
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int progress = esp_tls_conn_new_async(host, strlen(host), port, &ssl->cfg, ssl->tls);
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if (progress >= 0) {
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if (esp_tls_get_conn_sockfd(ssl->tls, &ssl->sockfd) != ESP_OK) {
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ESP_LOGE(TAG, "Error in obtaining socket fd for the session");
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esp_tls_conn_destroy(ssl->tls);
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return -1;
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}
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}
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return progress;
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}
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return 0;
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}
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static inline int ssl_connect_async(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
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{
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return esp_tls_connect_async(t, host, port, timeout_ms, false);
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}
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static inline int tcp_connect_async(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
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{
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return esp_tls_connect_async(t, host, port, timeout_ms, true);
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}
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static int ssl_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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ssl->cfg.timeout_ms = timeout_ms;
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ssl->ssl_initialized = true;
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ssl->tls = esp_tls_init();
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if (ssl->tls == NULL) {
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ESP_LOGE(TAG, "Failed to initialize new connection object");
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capture_tcp_transport_error(t, ERR_TCP_TRANSPORT_NO_MEM);
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return -1;
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}
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if (esp_tls_conn_new_sync(host, strlen(host), port, &ssl->cfg, ssl->tls) <= 0) {
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ESP_LOGE(TAG, "Failed to open a new connection");
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esp_tls_error_handle_t esp_tls_error_handle;
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if (esp_tls_get_error_handle(ssl->tls, &esp_tls_error_handle) == ESP_OK) {
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esp_transport_set_errors(t, esp_tls_error_handle);
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} else {
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ESP_LOGE(TAG, "Error in obtaining the error handle");
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}
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goto exit_failure;
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}
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if (esp_tls_get_conn_sockfd(ssl->tls, &ssl->sockfd) != ESP_OK) {
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ESP_LOGE(TAG, "Error in obtaining socket fd for the session");
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goto exit_failure;
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}
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return 0;
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exit_failure:
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esp_tls_conn_destroy(ssl->tls);
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ssl->tls = NULL;
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ssl->sockfd = INVALID_SOCKET;
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return -1;
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}
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static int tcp_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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esp_tls_last_error_t *err_handle = esp_transport_get_error_handle(t);
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ssl->cfg.timeout_ms = timeout_ms;
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esp_err_t err = esp_tls_plain_tcp_connect(host, strlen(host), port, &ssl->cfg, err_handle, &ssl->sockfd);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "Failed to open a new connection: %d", err);
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err_handle->last_error = err;
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ssl->sockfd = INVALID_SOCKET;
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return -1;
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}
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return 0;
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}
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static int base_poll_read(esp_transport_handle_t t, int timeout_ms)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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int ret = -1;
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int remain = 0;
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struct timeval timeout;
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fd_set readset;
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fd_set errset;
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FD_ZERO(&readset);
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FD_ZERO(&errset);
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FD_SET(ssl->sockfd, &readset);
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FD_SET(ssl->sockfd, &errset);
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if (ssl->tls && (remain = esp_tls_get_bytes_avail(ssl->tls)) > 0) {
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ESP_LOGD(TAG, "remain data in cache, need to read again");
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return remain;
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}
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ret = select(ssl->sockfd + 1, &readset, NULL, &errset, esp_transport_utils_ms_to_timeval(timeout_ms, &timeout));
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if (ret > 0 && FD_ISSET(ssl->sockfd, &errset)) {
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int sock_errno = 0;
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uint32_t optlen = sizeof(sock_errno);
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getsockopt(ssl->sockfd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
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esp_transport_capture_errno(t, sock_errno);
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ESP_LOGE(TAG, "poll_read select error %d, errno = %s, fd = %d", sock_errno, strerror(sock_errno), ssl->sockfd);
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ret = -1;
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} else if (ret == 0) {
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ESP_LOGV(TAG, "poll_read: select - Timeout before any socket was ready!");
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}
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return ret;
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}
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static int base_poll_write(esp_transport_handle_t t, int timeout_ms)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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int ret = -1;
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struct timeval timeout;
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fd_set writeset;
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fd_set errset;
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FD_ZERO(&writeset);
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FD_ZERO(&errset);
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FD_SET(ssl->sockfd, &writeset);
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FD_SET(ssl->sockfd, &errset);
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ret = select(ssl->sockfd + 1, NULL, &writeset, &errset, esp_transport_utils_ms_to_timeval(timeout_ms, &timeout));
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if (ret > 0 && FD_ISSET(ssl->sockfd, &errset)) {
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int sock_errno = 0;
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uint32_t optlen = sizeof(sock_errno);
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getsockopt(ssl->sockfd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
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esp_transport_capture_errno(t, sock_errno);
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ESP_LOGE(TAG, "poll_write select error %d, errno = %s, fd = %d", sock_errno, strerror(sock_errno), ssl->sockfd);
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ret = -1;
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} else if (ret == 0) {
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ESP_LOGD(TAG, "poll_write: select - Timeout before any socket was ready!");
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}
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return ret;
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}
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static int ssl_write(esp_transport_handle_t t, const char *buffer, int len, int timeout_ms)
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{
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int poll;
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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if ((poll = esp_transport_poll_write(t, timeout_ms)) <= 0) {
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ESP_LOGW(TAG, "Poll timeout or error, errno=%s, fd=%d, timeout_ms=%d", strerror(errno), ssl->sockfd, timeout_ms);
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return poll;
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}
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int ret = esp_tls_conn_write(ssl->tls, (const unsigned char *) buffer, len);
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if (ret < 0) {
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ESP_LOGE(TAG, "esp_tls_conn_write error, errno=%s", strerror(errno));
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esp_tls_error_handle_t esp_tls_error_handle;
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if (esp_tls_get_error_handle(ssl->tls, &esp_tls_error_handle) == ESP_OK) {
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esp_transport_set_errors(t, esp_tls_error_handle);
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} else {
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ESP_LOGE(TAG, "Error in obtaining the error handle");
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}
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}
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return ret;
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}
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static int tcp_write(esp_transport_handle_t t, const char *buffer, int len, int timeout_ms)
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{
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int poll;
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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if ((poll = esp_transport_poll_write(t, timeout_ms)) <= 0) {
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ESP_LOGW(TAG, "Poll timeout or error, errno=%s, fd=%d, timeout_ms=%d", strerror(errno), ssl->sockfd, timeout_ms);
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return poll;
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}
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int ret = send(ssl->sockfd, (const unsigned char *) buffer, len, 0);
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if (ret < 0) {
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ESP_LOGE(TAG, "tcp_write error, errno=%s", strerror(errno));
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esp_transport_capture_errno(t, errno);
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}
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return ret;
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}
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static int ssl_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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int poll = esp_transport_poll_read(t, timeout_ms);
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if (poll == -1) {
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return ERR_TCP_TRANSPORT_CONNECTION_FAILED;
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}
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if (poll == 0) {
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return ERR_TCP_TRANSPORT_CONNECTION_TIMEOUT;
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}
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int ret = esp_tls_conn_read(ssl->tls, (unsigned char *)buffer, len);
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if (ret < 0) {
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ESP_LOGE(TAG, "esp_tls_conn_read error, errno=%s", strerror(errno));
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if (ret == ESP_TLS_ERR_SSL_WANT_READ || ret == ESP_TLS_ERR_SSL_TIMEOUT) {
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ret = ERR_TCP_TRANSPORT_CONNECTION_TIMEOUT;
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}
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esp_tls_error_handle_t esp_tls_error_handle;
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if (esp_tls_get_error_handle(ssl->tls, &esp_tls_error_handle) == ESP_OK) {
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esp_transport_set_errors(t, esp_tls_error_handle);
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} else {
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ESP_LOGE(TAG, "Error in obtaining the error handle");
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}
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} else if (ret == 0) {
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if (poll > 0) {
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// no error, socket reads 0 while previously detected as readable -> connection has been closed cleanly
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capture_tcp_transport_error(t, ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN);
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}
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ret = ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN;
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}
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return ret;
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}
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static int tcp_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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int poll = esp_transport_poll_read(t, timeout_ms);
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if (poll == -1) {
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return ERR_TCP_TRANSPORT_CONNECTION_FAILED;
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}
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if (poll == 0) {
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return ERR_TCP_TRANSPORT_CONNECTION_TIMEOUT;
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}
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int ret = recv(ssl->sockfd, (unsigned char *)buffer, len, 0);
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if (ret < 0) {
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ESP_LOGE(TAG, "tcp_read error, errno=%s", strerror(errno));
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esp_transport_capture_errno(t, errno);
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if (errno == EAGAIN) {
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ret = ERR_TCP_TRANSPORT_CONNECTION_TIMEOUT;
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} else {
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ret = ERR_TCP_TRANSPORT_CONNECTION_FAILED;
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}
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} else if (ret == 0) {
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if (poll > 0) {
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// no error, socket reads 0 while previously detected as readable -> connection has been closed cleanly
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capture_tcp_transport_error(t, ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN);
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}
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ret = ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN;
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}
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return ret;
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}
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static int base_close(esp_transport_handle_t t)
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{
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int ret = -1;
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transport_esp_tls_t *ssl = ssl_get_context_data(t);
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if (ssl && ssl->ssl_initialized) {
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ret = esp_tls_conn_destroy(ssl->tls);
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ssl->tls = NULL;
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ssl->conn_state = TRANS_SSL_INIT;
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ssl->ssl_initialized = false;
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ssl->sockfd = INVALID_SOCKET;
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} else if (ssl && ssl->sockfd >= 0) {
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ret = close(ssl->sockfd);
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ssl->sockfd = INVALID_SOCKET;
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}
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return ret;
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}
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static int base_destroy(esp_transport_handle_t transport)
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{
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transport_esp_tls_t *ssl = ssl_get_context_data(transport);
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if (ssl) {
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esp_transport_close(transport);
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esp_transport_destroy_foundation_transport(transport->foundation);
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esp_transport_esp_tls_destroy(transport->data); // okay to pass NULL
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}
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return 0;
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}
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void esp_transport_ssl_enable_global_ca_store(esp_transport_handle_t t)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.use_global_ca_store = true;
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}
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void esp_transport_ssl_set_tls_version(esp_transport_handle_t t, esp_tls_proto_ver_t tls_version)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.tls_version = tls_version;
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}
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#ifdef CONFIG_ESP_TLS_PSK_VERIFICATION
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void esp_transport_ssl_set_psk_key_hint(esp_transport_handle_t t, const psk_hint_key_t *psk_hint_key)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.psk_hint_key = psk_hint_key;
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}
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#endif
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void esp_transport_ssl_set_cert_data(esp_transport_handle_t t, const char *data, int len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.cacert_pem_buf = (void *)data;
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ssl->cfg.cacert_pem_bytes = len + 1;
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}
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void esp_transport_ssl_set_cert_data_der(esp_transport_handle_t t, const char *data, int len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.cacert_buf = (void *)data;
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ssl->cfg.cacert_bytes = len;
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}
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void esp_transport_ssl_set_client_cert_data(esp_transport_handle_t t, const char *data, int len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.clientcert_pem_buf = (void *)data;
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ssl->cfg.clientcert_pem_bytes = len + 1;
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}
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#ifdef CONFIG_MBEDTLS_HARDWARE_ECDSA_SIGN
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void esp_transport_ssl_set_client_key_ecdsa_peripheral(esp_transport_handle_t t, uint8_t ecdsa_efuse_blk)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.use_ecdsa_peripheral = true;
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ssl->cfg.ecdsa_key_efuse_blk = ecdsa_efuse_blk;
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}
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#endif
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void esp_transport_ssl_set_client_cert_data_der(esp_transport_handle_t t, const char *data, int len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.clientcert_buf = (void *)data;
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ssl->cfg.clientcert_bytes = len;
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}
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void esp_transport_ssl_set_client_key_data(esp_transport_handle_t t, const char *data, int len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.clientkey_pem_buf = (void *)data;
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ssl->cfg.clientkey_pem_bytes = len + 1;
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}
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void esp_transport_ssl_set_client_key_password(esp_transport_handle_t t, const char *password, int password_len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.clientkey_password = (void *)password;
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ssl->cfg.clientkey_password_len = password_len;
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}
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void esp_transport_ssl_set_client_key_data_der(esp_transport_handle_t t, const char *data, int len)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.clientkey_buf = (void *)data;
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ssl->cfg.clientkey_bytes = len;
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}
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#if defined(CONFIG_MBEDTLS_SSL_ALPN) || defined(CONFIG_WOLFSSL_HAVE_ALPN)
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void esp_transport_ssl_set_alpn_protocol(esp_transport_handle_t t, const char **alpn_protos)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.alpn_protos = alpn_protos;
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}
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#endif
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void esp_transport_ssl_skip_common_name_check(esp_transport_handle_t t)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.skip_common_name = true;
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}
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void esp_transport_ssl_set_common_name(esp_transport_handle_t t, const char *common_name)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.common_name = common_name;
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}
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#ifdef CONFIG_ESP_TLS_USE_SECURE_ELEMENT
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void esp_transport_ssl_use_secure_element(esp_transport_handle_t t)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.use_secure_element = true;
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}
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#endif
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#ifdef CONFIG_MBEDTLS_CERTIFICATE_BUNDLE
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void esp_transport_ssl_crt_bundle_attach(esp_transport_handle_t t, esp_err_t ((*crt_bundle_attach)(void *conf)))
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.crt_bundle_attach = crt_bundle_attach;
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}
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#endif
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static int base_get_socket(esp_transport_handle_t t)
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{
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transport_esp_tls_t *ctx = ssl_get_context_data(t);
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if (ctx) {
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return ctx->sockfd;
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}
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return INVALID_SOCKET;
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}
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#ifdef CONFIG_ESP_TLS_USE_DS_PERIPHERAL
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void esp_transport_ssl_set_ds_data(esp_transport_handle_t t, void *ds_data)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.ds_data = ds_data;
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}
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#endif
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void esp_transport_ssl_set_keep_alive(esp_transport_handle_t t, esp_transport_keep_alive_t *keep_alive_cfg)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.keep_alive_cfg = (tls_keep_alive_cfg_t *) keep_alive_cfg;
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}
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void esp_transport_ssl_set_interface_name(esp_transport_handle_t t, struct ifreq *if_name)
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{
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GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
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ssl->cfg.if_name = if_name;
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}
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static transport_esp_tls_t *esp_transport_esp_tls_create(void)
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{
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transport_esp_tls_t *transport_esp_tls = calloc(1, sizeof(transport_esp_tls_t));
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if (transport_esp_tls == NULL) {
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return NULL;
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}
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transport_esp_tls->sockfd = INVALID_SOCKET;
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return transport_esp_tls;
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}
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static esp_transport_handle_t esp_transport_base_init(void)
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{
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esp_transport_handle_t transport = esp_transport_init();
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if (transport == NULL) {
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return NULL;
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}
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transport->foundation = esp_transport_init_foundation_transport();
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ESP_TRANSPORT_MEM_CHECK(TAG, transport->foundation,
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free(transport);
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return NULL);
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transport->data = esp_transport_esp_tls_create();
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ESP_TRANSPORT_MEM_CHECK(TAG, transport->data,
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free(transport->foundation);
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free(transport);
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return NULL)
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return transport;
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}
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esp_transport_handle_t esp_transport_ssl_init(void)
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{
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esp_transport_handle_t ssl_transport = esp_transport_base_init();
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if (ssl_transport == NULL) {
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return NULL;
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}
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((transport_esp_tls_t *)ssl_transport->data)->cfg.is_plain_tcp = false;
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esp_transport_set_func(ssl_transport, ssl_connect, ssl_read, ssl_write, base_close, base_poll_read, base_poll_write, base_destroy);
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esp_transport_set_async_connect_func(ssl_transport, ssl_connect_async);
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ssl_transport->_get_socket = base_get_socket;
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return ssl_transport;
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}
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void esp_transport_esp_tls_destroy(struct transport_esp_tls *transport_esp_tls)
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{
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free(transport_esp_tls);
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}
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esp_transport_handle_t esp_transport_tcp_init(void)
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{
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esp_transport_handle_t tcp_transport = esp_transport_base_init();
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if (tcp_transport == NULL) {
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return NULL;
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}
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((transport_esp_tls_t *)tcp_transport->data)->cfg.is_plain_tcp = true;
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esp_transport_set_func(tcp_transport, tcp_connect, tcp_read, tcp_write, base_close, base_poll_read, base_poll_write, base_destroy);
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esp_transport_set_async_connect_func(tcp_transport, tcp_connect_async);
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tcp_transport->_get_socket = base_get_socket;
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return tcp_transport;
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}
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void esp_transport_tcp_set_keep_alive(esp_transport_handle_t t, esp_transport_keep_alive_t *keep_alive_cfg)
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{
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return esp_transport_ssl_set_keep_alive(t, keep_alive_cfg);
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}
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void esp_transport_tcp_set_interface_name(esp_transport_handle_t t, struct ifreq *if_name)
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{
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return esp_transport_ssl_set_interface_name(t, if_name);
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}
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