Allow passing IP as connect method parameter in WiFiClientSecure and skip unnecessary host-ip conversions (#7643)

Author: cziter15

Diff for: libraries/WiFiClientSecure/src/WiFiClientSecure.cpp

@@ -124,12 +124,21 @@ int WiFiClientSecure::connect(const char *host, uint16_t port, int32_t timeout){
 
 int WiFiClientSecure::connect(IPAddress ip, uint16_t port, const char *CA_cert, const char *cert, const char *private_key)
 {
-    return connect(ip.toString().c_str(), port, CA_cert, cert, private_key);
+    return connect(ip, port, NULL, CA_cert, cert, private_key);
 }
 
 int WiFiClientSecure::connect(const char *host, uint16_t port, const char *CA_cert, const char *cert, const char *private_key)
 {
-    int ret = start_ssl_client(sslclient, host, port, _timeout, CA_cert, _use_ca_bundle, cert, private_key, NULL, NULL, _use_insecure, _alpn_protos);
+    IPAddress address;
+    if (!WiFi.hostByName(host, address))
+        return 0;
+
+    return connect(address, port, host, CA_cert, cert, private_key);
+}
+
+int WiFiClientSecure::connect(IPAddress ip, uint16_t port, const char *host, const char *CA_cert, const char *cert, const char *private_key)
+{
+    int ret = start_ssl_client(sslclient, ip, port, host, _timeout, CA_cert, _use_ca_bundle, cert, private_key, NULL, NULL, _use_insecure, _alpn_protos);
     _lastError = ret;
     if (ret < 0) {
         log_e("start_ssl_client: %d", ret);
@@ -146,7 +155,12 @@ int WiFiClientSecure::connect(IPAddress ip, uint16_t port, const char *pskIdent,
 
 int WiFiClientSecure::connect(const char *host, uint16_t port, const char *pskIdent, const char *psKey) {
     log_v("start_ssl_client with PSK");
-    int ret = start_ssl_client(sslclient, host, port, _timeout, NULL, false, NULL, NULL, pskIdent, psKey, _use_insecure, _alpn_protos);
+
+    IPAddress address;
+    if (!WiFi.hostByName(host, address))
+        return 0;
+
+    int ret = start_ssl_client(sslclient, address, port, host, _timeout, NULL, false, NULL, NULL, pskIdent, psKey, _use_insecure, _alpn_protos);
     _lastError = ret;
     if (ret < 0) {
         log_e("start_ssl_client: %d", ret);

Diff for: libraries/WiFiClientSecure/src/WiFiClientSecure.h

@@ -55,6 +55,7 @@ class WiFiClientSecure : public WiFiClient
     int connect(const char *host, uint16_t port, const char *rootCABuff, const char *cli_cert, const char *cli_key);
     int connect(IPAddress ip, uint16_t port, const char *pskIdent, const char *psKey);
     int connect(const char *host, uint16_t port, const char *pskIdent, const char *psKey);
+    int connect(IPAddress ip, uint16_t port, const char *host, const char *CA_cert, const char *cert, const char *private_key);
     int peek();
     size_t write(uint8_t data);
     size_t write(const uint8_t *buf, size_t size);

Diff for: libraries/WiFiClientSecure/src/ssl_client.cpp

@@ -53,7 +53,7 @@ void ssl_init(sslclient_context *ssl_client)
     mbedtls_ctr_drbg_init(&ssl_client->drbg_ctx);
 }
 
-int start_ssl_client(sslclient_context *ssl_client, const char *host, uint32_t port, int timeout, const char *rootCABuff, bool useRootCABundle, const char *cli_cert, const char *cli_key, const char *pskIdent, const char *psKey, bool insecure, const char **alpn_protos)
+int start_ssl_client(sslclient_context *ssl_client, const IPAddress& ip, uint32_t port, const char* hostname, int timeout, const char *rootCABuff, bool useRootCABundle, const char *cli_cert, const char *cli_key, const char *pskIdent, const char *psKey, bool insecure, const char **alpn_protos)
 {
     char buf[512];
     int ret, flags;
@@ -73,16 +73,11 @@ int start_ssl_client(sslclient_context *ssl_client, const char *host, uint32_t p
         return ssl_client->socket;
     }
 
-    IPAddress srv((uint32_t)0);
-    if(!WiFiGenericClass::hostByName(host, srv)){
-        return -1;
-    }
-
     fcntl( ssl_client->socket, F_SETFL, fcntl( ssl_client->socket, F_GETFL, 0 ) | O_NONBLOCK );
     struct sockaddr_in serv_addr;
     memset(&serv_addr, 0, sizeof(serv_addr));
     serv_addr.sin_family = AF_INET;
-    serv_addr.sin_addr.s_addr = srv;
+    serv_addr.sin_addr.s_addr = ip;
     serv_addr.sin_port = htons(port);
 
     if(timeout <= 0){
@@ -261,7 +256,7 @@ int start_ssl_client(sslclient_context *ssl_client, const char *host, uint32_t p
     log_v("Setting hostname for TLS session...");
 
     // Hostname set here should match CN in server certificate
-    if((ret = mbedtls_ssl_set_hostname(&ssl_client->ssl_ctx, host)) != 0){
+    if((ret = mbedtls_ssl_set_hostname(&ssl_client->ssl_ctx, hostname != NULL ? hostname : ip.toString().c_str())) != 0){
         return handle_error(ret);
     }
 

Diff for: libraries/WiFiClientSecure/src/ssl_client.h

@@ -30,7 +30,7 @@ typedef struct sslclient_context {
 
 
 void ssl_init(sslclient_context *ssl_client);
-int start_ssl_client(sslclient_context *ssl_client, const char *host, uint32_t port, int timeout, const char *rootCABuff, bool useRootCABundle, const char *cli_cert, const char *cli_key, const char *pskIdent, const char *psKey, bool insecure, const char **alpn_protos);
+int start_ssl_client(sslclient_context *ssl_client, const IPAddress& ip, uint32_t port, const char* hostname, int timeout, const char *rootCABuff, bool useRootCABundle, const char *cli_cert, const char *cli_key, const char *pskIdent, const char *psKey, bool insecure, const char **alpn_protos);
 void stop_ssl_socket(sslclient_context *ssl_client, const char *rootCABuff, const char *cli_cert, const char *cli_key);
 int data_to_read(sslclient_context *ssl_client);
 int send_ssl_data(sslclient_context *ssl_client, const uint8_t *data, size_t len);