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