remove redundant use_ssl variables

just use the presence of an SSL object as an indicator. if something
goes wrong during the ssl handshake or certificate validation, the
socket must be immediately closed anyway.

src/drv_imap.c

@@ -98,7 +98,6 @@ typedef struct {
 	int fd;
 #ifdef HAVE_LIBSSL
 	SSL *ssl;
-	unsigned int use_ssl:1;
 #endif
 } Socket_t;
 
@@ -355,7 +354,7 @@ socket_perror( const char *func, Socket_t *sock, int ret )
 #ifdef HAVE_LIBSSL
 	int err;
 
-	if (sock->use_ssl) {
+	if (sock->ssl) {
 		switch ((err = SSL_get_error( sock->ssl, ret ))) {
 		case SSL_ERROR_SYSCALL:
 		case SSL_ERROR_SSL:
@@ -390,7 +389,7 @@ socket_read( Socket_t *sock, char *buf, int len )
 	assert( sock->fd >= 0 );
 	n =
 #ifdef HAVE_LIBSSL
-		sock->use_ssl ? SSL_read( sock->ssl, buf, len ) :
+		sock->ssl ? SSL_read( sock->ssl, buf, len ) :
 #endif
 		read( sock->fd, buf, len );
 	if (n <= 0) {
@@ -409,7 +408,7 @@ socket_write( Socket_t *sock, char *buf, int len )
 	assert( sock->fd >= 0 );
 	n =
 #ifdef HAVE_LIBSSL
-		sock->use_ssl ? SSL_write( sock->ssl, buf, len ) :
+		sock->ssl ? SSL_write( sock->ssl, buf, len ) :
 #endif
 		write( sock->fd, buf, len );
 	if (n != len) {
@@ -430,7 +429,7 @@ socket_pending( Socket_t *sock )
 	if (num > 0)
 		return num;
 #ifdef HAVE_LIBSSL
-	if (sock->use_ssl)
+	if (sock->ssl)
 		return SSL_pending( sock->ssl );
 #endif
 	return 0;
@@ -1212,7 +1211,6 @@ start_tls( imap_store_t *ctx )
 	if (verify_cert( ctx ))
 		return 1;
 
-	ctx->buf.sock.use_ssl = 1;
 	info( "Connection is now encrypted\n" );
 	return 0;
 }
@@ -1300,9 +1298,6 @@ imap_open_store( store_conf_t *conf,
 	struct hostent *he;
 	struct sockaddr_in addr;
 	int s, a[2], preauth;
-#ifdef HAVE_LIBSSL
-	int use_ssl;
-#endif
 
 	for (ctxp = &unowned; (ctx = (imap_store_t *)*ctxp); ctxp = &ctx->gen.next)
 		if (((imap_store_conf_t *)ctx->gen.conf)->server == srvc) {
@@ -1322,10 +1317,6 @@ imap_open_store( store_conf_t *conf,
 	ctx->in_progress_append = &ctx->in_progress;
 
 	/* open connection to IMAP server */
-#ifdef HAVE_LIBSSL
-	use_ssl = 0;
-#endif
-
 	if (srvc->tunnel) {
 		infon( "Starting tunnel '%s'... ", srvc->tunnel );
 
@@ -1388,7 +1379,6 @@ imap_open_store( store_conf_t *conf,
 	if (srvc->use_imaps) {
 		if (start_tls( ctx ))
 			goto ssl_bail;
-		use_ssl = 1;
 	}
 #endif
 
@@ -1420,7 +1410,6 @@ imap_open_store( store_conf_t *conf,
 					goto bail;
 				if (start_tls( ctx ))
 					goto ssl_bail;
-				use_ssl = 1;
 
 				if (imap_exec( ctx, 0, "CAPABILITY" ) != RESP_OK)
 					goto bail;
@@ -1476,7 +1465,7 @@ imap_open_store( store_conf_t *conf,
 				goto bail;
 			}
 #ifdef HAVE_LIBSSL
-			if (!use_ssl)
+			if (!ctx->buf.sock.ssl)
 #endif
 				warn( "*** IMAP Warning *** Password is being sent in the clear\n" );
 			if (imap_exec( ctx, 0, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass ) != RESP_OK) {