Use SNI on outgoing TLS connections
When establishing an outgoing TLS connection using a hostname as a target, use TLS SNI extensions to include the hostname in use.
#include <openssl/decoder.h>
#endif
#include <sys/uio.h>
+#include <arpa/inet.h>
#define REDIS_TLS_PROTO_TLSv1 (1<<0)
#define REDIS_TLS_PROTO_TLSv1_1 (1<<1)
@@ -857,10 +858,16 @@ static int connTLSAccept(connection *_conn, ConnectionCallbackFunc accept_handle
static int connTLSConnect(connection *conn_, const char *addr, int port, const char *src_addr, ConnectionCallbackFunc connect_handler) {
tls_connection *conn = (tls_connection *) conn_;
+ unsigned char addr_buf[sizeof(struct in6_addr)];
if (conn->c.state != CONN_STATE_NONE) return C_ERR;
ERR_clear_error();
+ /* Check whether addr is an IP address, if not, use the value for Server Name Indication */
+ if (inet_pton(AF_INET, addr, addr_buf) != 1 && inet_pton(AF_INET6, addr, addr_buf) != 1) {
+ SSL_set_tlsext_host_name(conn->ssl, addr);
+ }
+
/* Initiate Socket connection first */
if (connectionTypeTcp()->connect(conn_, addr, port, src_addr, connect_handler) == C_ERR) return C_ERR;
