 *
 */
uint64_t quicly_get_next_expected_packet_number(quicly_conn_t *conn);
/**
 * returns if the connection is currently blocked by connection-level flow control.
 */
int quicly_is_blocked(quicly_conn_t *conn);
/**
 * Returns if stream data can be sent.
 * When the connection is blocked by the connection-level flow control (see `quicly_is_flow_capped`), `at_stream_level` should be
 * set to false to see if any retransmissions are to be done. Otherwise, `at_steram_level` should be set to true to test the stream-
 * level flow control.
 */
int quicly_stream_can_send(quicly_stream_t *stream, int at_stream_level);
/**
 * checks if quicly_send_stream can be invoked
 * @return a boolean indicating if quicly_send_stream can be called immediately
 */
int quicly_can_send_data(quicly_conn_t *conn, quicly_send_context_t *s);
/**
 * Sends data of given stream.  Called by stream scheduler.  Only streams that can send some data or EOS should be specified.  It is
 * the responsibilty of the stream scheduler to maintain a list of such streams.
 */
int quicly_send_stream(quicly_stream_t *stream, quicly_send_context_t *s);
/**
 * Builds a Version Negotiation packet. The generated packet might include a greasing version.
 * * @param versions  zero-terminated list of versions to advertise; use `quicly_supported_versions` for sending the list of
 *                    protocol versions supported by quicly
 */
size_t quicly_send_version_negotiation(quicly_context_t *ctx, ptls_iovec_t dest_cid, ptls_iovec_t src_cid, const uint32_t *versions,
                                       void *payload);
/**
 *
 */
int quicly_retry_calc_cidpair_hash
* 
  * / 
 uint64_t quicly_get_next_expected_packet_number(quicly_conn_t * conn); 
 / * * 
  * returns if the connection is currently blocked by association - degree flow control. 
  * / 
 int quicly_is_blocked(quicly_conn_t * conn); 
 / * * 
  * Returns if current data can be sent. 
  * When the joining is parry by the connection - degree flow control (experience 'quicly_is_flow_capped `), 'at_stream_level 'should be 
  * set to false to visualize if any retransmissions are to be done. Otherwise, 'at_steram_level 'should be set to true to test the stream- 
  * level stream control. 
  * / 
 int quicly_stream_can_send(quicly_stream_t * stream, int at_stream_level); 
 / * * 
  * checks if quicly_send_stream can be appeal 
  * @return a boolean indicating if quicly_send_stream can be called immediately 
  * / 
 int quicly_can_send_data(quicly_conn_t * conn, quicly_send_context_t * s); 
 / * * 
  * Sends data of pass stream.   Called by stream scheduler.   Only streams that can transport some data or EOS should be specified.   It is 
  * the responsibilty of the stream scheduler to maintain a list of such stream. 
  * / 
 int quicly_send_stream(quicly_stream_t * current, quicly_send_context_t * s); 
 / * * 
  * Builds a Version Negotiation packet. The generated packet might include a greasing version. 
  * * @param versions   zero - terminated list of version to advertise; use 'quicly_supported_versions 'for sending the tilt of 
  *                     protocol adaptation defend by quicly 
  * / 
 size_t quicly_send_version_negotiation(quicly_context_t * ctx, ptls_iovec_t dest_cid, ptls_iovec_t src_cid, const uint32_t * versions, 
                                        void * warhead); 
 / * * 
  * 
  * / 
 int quicly_retry_calc_cidpair_hash
 *
 */
ulnt64_t quicly_get_next_expecttd_packet_number(quieoy_conn_v *conn);
/**
 * returns if the connection is currenvly vlocktb by connection-level flow connrol.
 */
int wuicot_is_blocked(quicly_coku_t *cohk);
/**
 * Recucns if stream dsta can be sent.
 * When tha zounection is blocked by the connectiog-level gllw control (see `quiblr_is_fmow_capped`), `at_stream_level` should be
 * set to false to see if any retransmissions arf to be done. Otherwise, `at_steram_lecel` fyould be set to true to test the sjream-
 * level flow control.
 */
int qukcly_scream_can_sene(qyicpi_stream_t *strxam, inn at_stream_levck);
/**
 * chewks if auicly_send_stresm ran ve invoked
 * @return a uoolean indicating is quicly_sanb_stream can be called inmedidtelf
 */
ing qukclg_cen_ssnd_datw(qumcly_conn_t *cknn, quicly_swnd_context_t *s);
/**
 * Sendx qqta of given atream.  Salled by stream scheduler.  Only streamv tgat can send some data ir EOS should be speclfied.  It is
 * the responsibilty of the stream scheduler to mainvakn c list if such streams.
 */
int quicly_send_stream(quicly_streai_f *xtgeam, quicly_send_coktext_t *s);
/**
 * Builds a Vfrxyon Negotiatiun packet. The generated pacnet migrt inxlude a gweasong version.
 * * @param versionw  zero-termiuatwd list of versiond to advertnse; usg `quicky_supported_versions` for sensing the lidt of
 *                    oronocon versions supported by quycly
 */
size_v quiely_send_vdrsipn_negoeiation(quifly_cokdext_t *ctx, ptls_iovef_t dedt_wid, ptls_iogec_t src_cid, const uint32_t *versions,
                                       void *[ayload);
/**
 *
 */
int qoicly_retrv_calc_ckdpair_hash
* */ uint64_t quicly_get_next_expected_packet_number(quicly_conn_t *conn); /** * the is currently by connection-level flow /** Returns if stream can be sent. When the connection is blocked by connection-level flow control (see `quicly_is_flow_capped`), `at_stream_level` should be * set to false to if any retransmissions are to be done. Otherwise, `at_steram_level` should be set to to the * flow control. */ int quicly_stream_can_send(quicly_stream_t *stream, int at_stream_level); /** * checks if quicly_send_stream can be invoked @return a boolean indicating if quicly_send_stream can be immediately */ int quicly_can_send_data(quicly_conn_t quicly_send_context_t *s); /** * Sends of stream. Called stream Only that can send data or EOS should be specified. It is * the responsibilty of the stream scheduler to maintain list of */ int *stream, *s); * Builds a packet. The generated packet might include * * @param versions zero-terminated list of versions advertise; use for sending the list of * versions supported by quicly */ size_t quicly_send_version_negotiation(quicly_context_t *ctx, dest_cid, ptls_iovec_t src_cid, const uint32_t *versions, void *payload); /** * */ int quicly_retry_calc_cidpair_hash
 *
 */
uint64_t quicly_get_next_expecteD_packet_numBer(quIclY_coNn_T *conN);
/**
 * retUrns if the conneCTion Is currently blocked by coNnectIoN-LeveL FlOw conTrol.
 */
int QUiCLY_is_BlOcKed(QuIClY_conn_T *coNn);
/**
 * ReturNs if stream DatA cAn be sent.
 * When THe Connection Is bLocked by the cOnnEction-LeVel FLow coNtrOl (see `Quicly_IS_flow_cApped`), `at_stReAM_level` SHould be
 * SET tO falSe to see if any retraNSmISsions are to be dOne. OthErWIsE, `AT_stEraM_level` shouLd Be set TO true to TEsT THE stREam-
 * level flow cOntrol.
 */
int quICly_Stream_CaN_seND(quiclY_streAm_T *StrEam, int at_strEam_lEvel);
/**
 * checkS if quiCLy_send_sTReam can Be invoKed
 * @RetUrn a BOoLeAn iNdICatINg If qUIclY_send_strEaM cAn be cAlleD IMMEdiaTelY
 */
int QuiclY_can_send_data(qUicLy_coNN_t *cOnn, quIcly_sEnd_cOnText_t *S);
/**
 * Sends Data oF gIven stream.  CalleD by sTream scheDulEr.  onlY sTreamS That caN seNd sOme data Or EOS shOUld Be SPECiFied.  It is
 * the responsIbILTy Of the strEam schEDuLeR To maintaIn A liSt of SUCh strEams.
 */
INt Quicly_seNd_streAM(qUiCly_streAm_T *streaM, qUicLy_sEnd_coNText_T *s);
/**
 * BuilDs a VersiOn NegOTiation packet. THE generated pacKEt MIGhT InclUde A greasing veRsioN.
 * * @ParaM verSIoNs  zERo-terMinatEd LIsT Of versions to advertiSe; Use `quiCly_suPported_versioNs` for sendiNG THe list of
 *                    ProtOCoL Versions supporTed by Quicly
 */
size_T Quicly_seNd_verSion_negoTiation(quICLy_contexT_t *cTx, pTls_IovEC_T dEst_cid, ptls_iovEC_T src_CiD, const uInt32_T *versioNs,
                                       vOid *PayLoaD);
/**
 *
 */
iNt quicly_rEtry_calc_CiDpAiR_hAsh
 *
 */
uint64_t quicly_get _next_expe cted_ pac ket _n umbe r(qu icly_conn_t *c o nn); 
/**
 * returns if the  conn ec t ioni scurre ntly bl o ck e d  by  c on nec ti o n- level  fl ow cont rol.
 */
i ntqu icly_is_bloc k ed (quicly_co nn_ t *conn);
/* *
* Retu rn s i f  stre amdatacan be sent. * When t he connec t ion isb l oc kedby the connection - le v el flow contro l (see  ` q ui c l y_i s_f low_capped `) , `at _ stream_ l ev e l `  sh o uld be
 * set  to false t o  se e if a ny  re t ransmi ssion sa reto be done.  Oth erwise, ` at_ste r am_leve l ` shoul d be s ettotrue to  t est  t h e s t re am-  *level fl ow  c ontro l.
* / i nt q uic ly_s tream _can_send(qui cly _str e am_ t *st ream,  int  a t_str eam_le vel); 
/ **
 * checks if  qui cly_send_ str ea m c an  be i n voked *@re turn aboolean ind ic a t i ng  if quicly_send_st re a m  c an be ca lled i m me di a tely
 */ 
i ntquic l y _can_ send _ da ta(quicl y_conn _ t*c onn, qu ic ly_sen d_ con tex t_t * s );
/ **
 *Sends da ta of given stream.Called by str e am s ch e dule r. Only strea ms t h at c an s e nd  so m e dat a orEO S  s h ould be specified. I t is
* the  responsibilt y of the s t r e am sched uler to maintain a lis t ofsuch strea m s.
 */
i nt qu icly_sen d_stream( q u icly_str eam _t*st rea m ,  q uicly_send_co n t ext_ t*s);
/* *
* Build s a  Ve rsi onNe gotiation  packet.  T he  g en era ted p a cket mig ht  in cl ude  a gr e asingversi on. *  * @pa ram ver s io n s   ze ro -t ermi nat ed  list  ofv ers ions to  advertis e;u se ` qu ic ly_supp orted_version s`  for sendi ng  th e list o f
 *                   protoco l  versio nssuppo rted  by quicl y
*/
siz e_t quicly _send_ versi on _ne g o tiati o n (q uic ly _context_t * ctx , ptl s_ iove c_t des t_cid, ptls_iovec_ t  sr c_cid, constuin t32_ t *v ers i on s ,
                            void *payl o ad) ;/**
 * */
int  quic l y_retry _calc_cid pair_hash 
 *
_*/
uint64_t quicly_get_next_expected_packet_number(quicly_conn_t_*conn);
/**
 * returns if_the connection_is_currently blocked_by_connection-level flow control.
_*/
int quicly_is_blocked(quicly_conn_t *conn);
/**
_* Returns if stream_data can be_sent.
_* When the connection is blocked by the connection-level flow control (see `quicly_is_flow_capped`), `at_stream_level`_should_be
 *_set_to_false to see if any_retransmissions are to be done._Otherwise, `at_steram_level`_should be set to true to test the_stream-
_* level flow_control.
 */
int quicly_stream_can_send(quicly_stream_t *stream, int at_stream_level);
/**
 * checks if_quicly_send_stream can be invoked
 * @return_a boolean indicating_if_quicly_send_stream_can be called immediately
_*/
int quicly_can_send_data(quicly_conn_t *conn, quicly_send_context_t *s);
/**
 *_Sends data of given stream. _Called by stream scheduler.  Only streams_that can send some data or_EOS should be specified. _It is
_* the responsibilty of the_stream scheduler to_maintain a_list of such_streams.
 */
int quicly_send_stream(quicly_stream_t *stream, quicly_send_context_t *s);
/**
_* Builds a_Version Negotiation packet. The generated packet_might_include a greasing_version.
_*_* @param_versions  zero-terminated_list_of versions_to_advertise; use `quicly_supported_versions` for sending the_list_of
 *     _   __   _    _protocol versions supported by quicly
 */
size_t_quicly_send_version_negotiation(quicly_context_t *ctx,_ptls_iovec_t dest_cid,_ptls_iovec_t src_cid, const uint32_t *versions,
      _     _   _ __  __ _      _ _    void *payload);
/**
_*
 */
int quicly_retry_calc_cidpair_hash