Add force_tls setting

Use TLS for all actions when requested. Closes #234

contrib/pianobar.1

@@ -194,6 +194,11 @@ Location of control fifo. Defaults to $XDG_CONFIG_HOME/pianobar/ctl (which is
 usually the value above). See section
 .B REMOTE CONTROL
 
+.TP
+.B force_tls = {0,1}
+Use TLS for all actions (not just sending login credentials). Use if you are on
+an untrusted network or to get around GeoIP restrictions.
+
 .TP
 .B format_list_song = %i) %a - %t%r
 Available format characters:

src/settings.c

@@ -121,6 +121,7 @@ void BarSettingsRead (BarSettings_t *settings) {
 		#endif
 	#endif
 	settings->autoselect = true;
+	settings->forceTls = false;
 	settings->history = 5;
 	settings->volume = 0;
 	settings->sortOrder = BAR_SORT_NAME_AZ;
@@ -245,6 +246,8 @@ void BarSettingsRead (BarSettings_t *settings) {
 			settings->fifo = strdup (val);
 		} else if (streq ("autoselect", key)) {
 			settings->autoselect = atoi (val);
+		} else if (streq ("force_tls", key)) {
+			settings->forceTls = atoi (val);
 		} else if (streq ("tls_fingerprint", key)) {
 			/* expects 40 byte hex-encoded sha1 */
 			if (strlen (val) == 40) {

src/settings.h

@@ -81,6 +81,7 @@ typedef struct {
 
 typedef struct {
 	bool autoselect;
+	bool forceTls;
 	unsigned int history;
 	int volume;
 	BarStationSorting_t sortOrder;

src/ui.c

@@ -134,14 +134,15 @@ void BarUiMsg (const BarSettings_t *settings, const BarUiMsg_t type,
 /*	fetch http resource (post request)
  *	@param waitress handle
  *	@param piano request (initialized by PianoRequest())
+ *	@param ignore libpiano TLS hint and use it always
  */
 static WaitressReturn_t BarPianoHttpRequest (WaitressHandle_t *waith,
-		PianoRequest_t *req) {
+		PianoRequest_t *req, bool forceTls) {
 	waith->extraHeaders = "Content-Type: text/xml\r\n";
 	waith->postData = req->postData;
 	waith->method = WAITRESS_METHOD_POST;
 	waith->url.path = req->urlPath;
-	waith->url.tls = req->secure;
+	waith->url.tls = req->secure || forceTls;
 
 	return WaitressFetchBuf (waith, &req->responseData);
 }
@@ -172,7 +173,7 @@ int BarUiPianoCall (BarApp_t * const app, PianoRequestType_t type,
 			return 0;
 		}
 
-		*wRet = BarPianoHttpRequest (&app->waith, &req);
+		*wRet = BarPianoHttpRequest (&app->waith, &req, app->settings.forceTls);
 		if (*wRet != WAITRESS_RET_OK) {
 			BarUiMsg (&app->settings, MSG_NONE, "Network error: %s\n", WaitressErrorToStr (*wRet));
 			if (req.responseData != NULL) {