214 struct HttpClient {  struct
277   std::function<int(HttpClient &)> readfn, writefn;  argument
278   std::function<int(HttpClient &, const uint8_t *, size_t)> on_readfn;  argument
279   std::function<int(HttpClient &)> on_writefn;  argument
280   nghttp2_session *session;
281   const nghttp2_session_callbacks *callbacks;
282   struct ev_loop *loop;
283   SSL_CTX *ssl_ctx;
284   SSL *ssl;
285   addrinfo *addrs;
286   addrinfo *next_addr;
287   addrinfo *cur_addr;
289   size_t complete;
292   size_t success;
294   size_t settings_payloadlen;
295   ClientState state;
297   unsigned int upgrade_response_status_code;
298   int fd;
301   bool upgrade_response_complete;
303   std::array<uint8_t, 128> settings_payload;
305   enum { ERR_CONNECT_FAIL = -100 };