#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/sctp.h>
int sctp_recvmsg(int sd, void * msg, size_t len,
struct sockaddr * from, socklen_t * fromlen,
struct sctp_sndrcvinfo * sinfo, int * msg_flags);
If from is not NULL, the source address of the message is filled in. The argument fromlen is a value-result parameter. initialized to the size of the buffer associated with from , and modified on return to indicate the actual size of the address stored.
sinfo is a pointer to a sctp_sndrcvinfo structure to be filled upon receipt of the message. msg_flags is a pointer to a integer that is filled with any message flags like MSG_NOTIFICATION or MSG_EOR.