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esp_transport: Use tcp_connect from esp_tls for plain TCP

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so we don't have to allocate esp_tls structure (~2KB) to save heap when using plain TCP connection

Closes https://github.com/espressif/esp-idf/issues/6940
This commit is contained in:
David Cermak 2021-05-04 10:23:52 +02:00
parent c01e259a98
commit f249ddd9ae
4 changed files with 107 additions and 29 deletions
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4
components/esp-tls/esp_tls.c
View File

@ -267,7 +267,7 @@ static esp_err_t esp_tls_set_socket_non_blocking(int fd, bool non_blocking)
return ESP_OK;
}
static esp_err_t esp_tcp_connect(const char *host, int hostlen, int port, int *sockfd, esp_tls_error_handle_t error_handle, const esp_tls_cfg_t *cfg)
esp_err_t esp_tls_tcp_connect(const char *host, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_error_handle_t error_handle, int *sockfd)
{
struct sockaddr_storage address;
int fd;
@ -371,7 +371,7 @@ static int esp_tls_low_level_conn(const char *hostname, int hostlen, int port, c
_esp_tls_net_init(tls);
tls->is_tls = true;
}
if ((esp_ret = esp_tcp_connect(hostname, hostlen, port, &tls->sockfd, tls->error_handle, cfg)) != ESP_OK) {
if ((esp_ret = esp_tls_tcp_connect(hostname, hostlen, port, cfg, tls->error_handle, &tls->sockfd)) != ESP_OK) {
ESP_INT_EVENT_TRACKER_CAPTURE(tls->error_handle, ESP_TLS_ERR_TYPE_ESP, esp_ret);
return -1;
}

14
components/esp-tls/esp_tls.h
View File

@ -599,6 +599,20 @@ int esp_tls_server_session_create(esp_tls_cfg_server_t *cfg, int sockfd, esp_tls
void esp_tls_server_session_delete(esp_tls_t *tls);
#endif /* ! CONFIG_ESP_TLS_SERVER */
/**
* @brief Creates a plain TCP connection, returning a valid socket fd on success or an error handle
*
* @param[in] host Hostname of the host.
* @param[in] hostlen Length of hostname.
* @param[in] port Port number of the host.
* @param[in] cfg ESP-TLS configuration as esp_tls_cfg_t.
* @param[out] error_handle ESP-TLS error handle holding potential errors occurred during connection
* @param[out] sockfd Socket descriptor if successfully connected on TCP layer
* @return ESP_OK on success
* ESP-TLS based error codes on failure
*/
esp_err_t esp_tls_tcp_connect(const char *host, int hostlen, int port, const esp_tls_cfg_t *cfg, esp_tls_error_handle_t error_handle, int *sockfd);
#ifdef __cplusplus
}
#endif

1
components/tcp_transport/test/test_transport.c
View File

@ -315,6 +315,7 @@ static void socket_operation_test(esp_transport_handle_t transport_under_test,
close(params.listen_sock);
close(params.accepted_sock);
xEventGroupWaitBits(params.tcp_connect_done, TCP_LISTENER_DONE, true, true, max_wait);
// Cleanup
TEST_ASSERT_EQUAL(false, params.tcp_listener_failed);
vEventGroupDelete(params.tcp_connect_done);

117
components/tcp_transport/transport_ssl.c
View File

@ -42,6 +42,7 @@ typedef struct transport_esp_tls {
esp_tls_cfg_t cfg;
bool ssl_initialized;
transport_ssl_conn_state_t conn_state;
int sockfd;
} transport_esp_tls_t;
static inline struct transport_esp_tls * ssl_get_context_data(esp_transport_handle_t t)
@ -95,12 +96,12 @@ static inline int tcp_connect_async(esp_transport_handle_t t, const char *host,
return esp_tls_connect_async(t, host, port, timeout_ms, true);
}
static int esp_tls_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms, bool is_plain_tcp)
static int ssl_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
{
transport_esp_tls_t *ssl = ssl_get_context_data(t);
ssl->cfg.timeout_ms = timeout_ms;
ssl->cfg.is_plain_tcp = is_plain_tcp;
ssl->cfg.is_plain_tcp = false;
ssl->ssl_initialized = true;
ssl->tls = esp_tls_init();
@ -114,19 +115,27 @@ static int esp_tls_connect(esp_transport_handle_t t, const char *host, int port,
esp_transport_set_errors(t, ssl->tls->error_handle);
esp_tls_conn_destroy(ssl->tls);
ssl->tls = NULL;
ssl->sockfd = -1;
return -1;
}
ssl->sockfd = ssl->tls->sockfd;
return 0;
}
static inline int ssl_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
static int tcp_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
{
return esp_tls_connect(t, host, port, timeout_ms, false);
}
transport_esp_tls_t *ssl = ssl_get_context_data(t);
esp_tls_last_error_t *err_handle = esp_transport_get_error_handle(t);
static inline int tcp_connect(esp_transport_handle_t t, const char *host, int port, int timeout_ms)
{
return esp_tls_connect(t, host, port, timeout_ms, true);
ssl->cfg.timeout_ms = timeout_ms;
esp_err_t err = esp_tls_tcp_connect(host, strlen(host), port, &ssl->cfg, err_handle, &ssl->sockfd);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to open a new connection: %d", err);
err_handle->last_error = err;
ssl->sockfd = -1;
return -1;
}
return 0;
}
static int ssl_poll_read(esp_transport_handle_t t, int timeout_ms)
@ -139,20 +148,20 @@ static int ssl_poll_read(esp_transport_handle_t t, int timeout_ms)
fd_set errset;
FD_ZERO(&readset);
FD_ZERO(&errset);
FD_SET(ssl->tls->sockfd, &readset);
FD_SET(ssl->tls->sockfd, &errset);
FD_SET(ssl->sockfd, &readset);
FD_SET(ssl->sockfd, &errset);
if ((remain = esp_tls_get_bytes_avail(ssl->tls)) > 0) {
if (ssl->tls && (remain = esp_tls_get_bytes_avail(ssl->tls)) > 0) {
ESP_LOGD(TAG, "remain data in cache, need to read again");
return remain;
}
ret = select(ssl->tls->sockfd + 1, &readset, NULL, &errset, esp_transport_utils_ms_to_timeval(timeout_ms, &timeout));
if (ret > 0 && FD_ISSET(ssl->tls->sockfd, &errset)) {
ret = select(ssl->sockfd + 1, &readset, NULL, &errset, esp_transport_utils_ms_to_timeval(timeout_ms, &timeout));
if (ret > 0 && FD_ISSET(ssl->sockfd, &errset)) {
int sock_errno = 0;
uint32_t optlen = sizeof(sock_errno);
getsockopt(ssl->tls->sockfd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
getsockopt(ssl->sockfd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
esp_transport_capture_errno(t, sock_errno);
ESP_LOGE(TAG, "ssl_poll_read select error %d, errno = %s, fd = %d", sock_errno, strerror(sock_errno), ssl->tls->sockfd);
ESP_LOGE(TAG, "poll_read select error %d, errno = %s, fd = %d", sock_errno, strerror(sock_errno), ssl->tls->sockfd);
ret = -1;
}
return ret;
@ -167,15 +176,15 @@ static int ssl_poll_write(esp_transport_handle_t t, int timeout_ms)
fd_set errset;
FD_ZERO(&writeset);
FD_ZERO(&errset);
FD_SET(ssl->tls->sockfd, &writeset);
FD_SET(ssl->tls->sockfd, &errset);
ret = select(ssl->tls->sockfd + 1, NULL, &writeset, &errset, esp_transport_utils_ms_to_timeval(timeout_ms, &timeout));
if (ret > 0 && FD_ISSET(ssl->tls->sockfd, &errset)) {
FD_SET(ssl->sockfd, &writeset);
FD_SET(ssl->sockfd, &errset);
ret = select(ssl->sockfd + 1, NULL, &writeset, &errset, esp_transport_utils_ms_to_timeval(timeout_ms, &timeout));
if (ret > 0 && FD_ISSET(ssl->sockfd, &errset)) {
int sock_errno = 0;
uint32_t optlen = sizeof(sock_errno);
getsockopt(ssl->tls->sockfd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
getsockopt(ssl->sockfd, SOL_SOCKET, SO_ERROR, &sock_errno, &optlen);
esp_transport_capture_errno(t, sock_errno);
ESP_LOGE(TAG, "ssl_poll_write select error %d, errno = %s, fd = %d", sock_errno, strerror(sock_errno), ssl->tls->sockfd);
ESP_LOGE(TAG, "poll_write select error %d, errno = %s, fd = %d", sock_errno, strerror(sock_errno), ssl->tls->sockfd);
ret = -1;
}
return ret;
@ -183,14 +192,14 @@ static int ssl_poll_write(esp_transport_handle_t t, int timeout_ms)
static int ssl_write(esp_transport_handle_t t, const char *buffer, int len, int timeout_ms)
{
int poll, ret;
int poll;
transport_esp_tls_t *ssl = ssl_get_context_data(t);
if ((poll = esp_transport_poll_write(t, timeout_ms)) <= 0) {
ESP_LOGW(TAG, "Poll timeout or error, errno=%s, fd=%d, timeout_ms=%d", strerror(errno), ssl->tls->sockfd, timeout_ms);
return poll;
}
ret = esp_tls_conn_write(ssl->tls, (const unsigned char *) buffer, len);
int ret = esp_tls_conn_write(ssl->tls, (const unsigned char *) buffer, len);
if (ret < 0) {
ESP_LOGE(TAG, "esp_tls_conn_write error, errno=%s", strerror(errno));
esp_transport_set_errors(t, ssl->tls->error_handle);
@ -198,15 +207,32 @@ static int ssl_write(esp_transport_handle_t t, const char *buffer, int len, int
return ret;
}
static int tcp_write(esp_transport_handle_t t, const char *buffer, int len, int timeout_ms)
{
int poll;
transport_esp_tls_t *ssl = ssl_get_context_data(t);
if ((poll = esp_transport_poll_write(t, timeout_ms)) <= 0) {
ESP_LOGW(TAG, "Poll timeout or error, errno=%s, fd=%d, timeout_ms=%d", strerror(errno), ssl->tls->sockfd, timeout_ms);
return poll;
}
int ret = send(ssl->sockfd,(const unsigned char *) buffer, len, 0);
if (ret < 0) {
ESP_LOGE(TAG, "tcp_write error, errno=%s", strerror(errno));
esp_transport_capture_errno(t, errno);
}
return ret;
}
static int ssl_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
{
int poll, ret;
int poll;
transport_esp_tls_t *ssl = ssl_get_context_data(t);
if ((poll = esp_transport_poll_read(t, timeout_ms)) <= 0) {
return poll;
}
ret = esp_tls_conn_read(ssl->tls, (unsigned char *)buffer, len);
int ret = esp_tls_conn_read(ssl->tls, (unsigned char *)buffer, len);
if (ret < 0) {
ESP_LOGE(TAG, "esp_tls_conn_read error, errno=%s", strerror(errno));
esp_transport_set_errors(t, ssl->tls->error_handle);
@ -221,6 +247,29 @@ static int ssl_read(esp_transport_handle_t t, char *buffer, int len, int timeout
return ret;
}
static int tcp_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
{
int poll;
transport_esp_tls_t *ssl = ssl_get_context_data(t);
if ((poll = esp_transport_poll_read(t, timeout_ms)) <= 0) {
return poll;
}
int ret = recv(ssl->sockfd, (unsigned char *)buffer, len, 0);
if (ret < 0) {
ESP_LOGE(TAG, "tcp_read error, errno=%s", strerror(errno));
esp_transport_capture_errno(t, errno);
}
if (ret == 0) {
if (poll > 0) {
// no error, socket reads 0 while previously detected as readable -> connection has been closed cleanly
capture_tcp_transport_error(t, ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN);
}
ret = -1;
}
return ret;
}
static int ssl_close(esp_transport_handle_t t)
{
int ret = -1;
@ -229,6 +278,10 @@ static int ssl_close(esp_transport_handle_t t)
ret = esp_tls_conn_destroy(ssl->tls);
ssl->conn_state = TRANS_SSL_INIT;
ssl->ssl_initialized = false;
ssl->sockfd = -1;
} else if (ssl && ssl->sockfd >= 0) {
close(ssl->sockfd);
ssl->sockfd = -1;
}
return ret;
}
@ -344,6 +397,15 @@ static int ssl_get_socket(esp_transport_handle_t t)
return -1;
}
static int tcp_get_socket(esp_transport_handle_t t)
{
transport_esp_tls_t *ctx = ssl_get_context_data(t);
if (ctx) {
return ctx->sockfd;
}
return -1;
}
void esp_transport_ssl_set_ds_data(esp_transport_handle_t t, void *ds_data)
{
GET_SSL_FROM_TRANSPORT_OR_RETURN(ssl, t);
@ -378,6 +440,7 @@ esp_transport_handle_t esp_transport_ssl_init(void)
struct transport_esp_tls* esp_transport_esp_tls_create(void)
{
transport_esp_tls_t *transport_esp_tls = calloc(1, sizeof(transport_esp_tls_t));
transport_esp_tls->sockfd = -1;
return transport_esp_tls;
}
@ -392,9 +455,9 @@ esp_transport_handle_t esp_transport_tcp_init(void)
if (t == NULL) {
return NULL;
}
esp_transport_set_func(t, tcp_connect, ssl_read, ssl_write, ssl_close, ssl_poll_read, ssl_poll_write, ssl_destroy);
esp_transport_set_func(t, tcp_connect, tcp_read, tcp_write, ssl_close, ssl_poll_read, ssl_poll_write, ssl_destroy);
esp_transport_set_async_connect_func(t, tcp_connect_async);
t->_get_socket = ssl_get_socket;
t->_get_socket = tcp_get_socket;
return t;
}