mongoose/docs/c-api/mg_http.h/mg_send_websocket_handshake3v.md

title	decl_name	symbol_kind	signature
mg_send_websocket_handshake3v()	mg_send_websocket_handshake3v	func	void mg_send_websocket_handshake3v(struct mg_connection *nc, const struct mg_str path, const struct mg_str host, const struct mg_str protocol, const struct mg_str extra_headers, const struct mg_str user, const struct mg_str pass);

Same as mg_send_websocket_handshake3 but with strings not necessarily NUL-temrinated