header file netinet/sctp.h is missing by default about dtls-examples HOT 3 CLOSED

DTLS-Examples/src$ make
cc -std=c99 -pedantic -Wall -g -Wextra -Wno-unused-parameter -Wno-unused-function -Wno-overlength-strings -I/usr/local/include -o dtls_sctp_chargen dtls_sctp_chargen.c -L/usr/local/lib -lssl -lcrypto -pthread -lm -ldl
dtls_sctp_chargen.c: In function ‘connection_handle’:
dtls_sctp_chargen.c:278:32: error: storage size of ‘sinfo’ isn’t known
  struct bio_dgram_sctp_sndinfo sinfo;
                                ^~~~~
dtls_sctp_chargen.c:279:32: error: storage size of ‘rinfo’ isn’t known
  struct bio_dgram_sctp_rcvinfo rinfo;
                                ^~~~~
...

  361 #ifndef OPENSSL_NO_SCTP
  362 /* SCTP parameter structs */
  363 struct bio_dgram_sctp_sndinfo
  364     {
  365     uint16_t snd_sid;
  366     uint16_t snd_flags;
  367     uint32_t snd_ppid;
  368     uint32_t snd_context;
  369     };
  370 
  371 struct bio_dgram_sctp_rcvinfo
  372     {
  373     uint16_t rcv_sid;
  374     uint16_t rcv_ssn;
  375     uint16_t rcv_flags;
  376     uint32_t rcv_ppid;
  377     uint32_t rcv_tsn;
  378     uint32_t rcv_cumtsn;
  379     uint32_t rcv_context;
  380     };
  381 
  382 struct bio_dgram_sctp_prinfo
  383     {
  384     uint16_t pr_policy;
  385     uint32_t pr_value;
  386     };
  387 #endif