SCTP_SENDMSG(3)            Linux Programmer's Manual           SCTP_SENDMSG(3)

       sctp_sendmsg - Send a message from a SCTP socket.

       #include <sys/types.h>
       #include <sys/socket.h>
       #include <netinet/sctp.h>

       int sctp_sendmsg(int sd, const void * msg, size_t len,
                        struct sockaddr *to, socklen_t tolen,
                        uint32_t ppid, uint32_t flags,
                        uint16_t stream_no, uint32_t timetolive,
                        uint32_t context);

       sctp_sendmsg  is  a wrapper library function that can be used to send a
       message from a socket while using the advanced features of SCTP.  sd is
       the  socket  descriptor  from  which  the  message pointed to by msg of
       length len is sent.  to is the destination address of the  message  and
       tolen  is  the length of the destination address.  stream_no identifies
       the stream number that the application wishes to send this message  to.
       flags parameter is composed of a bitwise OR of the following values.

              This flags requests the un-ordered delivery of the message.

              This  flag, in the one-to-many style, requests the SCTP stack to
              override the primary destination address with address  specified
              in to.

              Setting  this  flag causes the specified association to abort by
              sending an ABORT message to the  peer(one-to-many  style  only).
              The  ABORT  chunk  will  contain  an error cause 'User Initiated
              Abort' with cause code 12. The  cause  specific  information  of
              this error cause is provided in msg.

              Setting  this  flag invokes the SCTP graceful shutdown procedure
              on the specific association(one-to-many style only).

       timetolive specifies the time duration  in  milliseconds.  The  sending
       side  will  expire  the message if the message has not been sent to the
       peer within this time period.  A value of 0 indicates that  no  timeout
       should occur on this message.  ppid is an opaque unsigned value that is
       passed to the remote end along with the message.  context is a  32  bit
       opaque  value that is passed back to the upper layer along with the un-
       delivered message if an error occurs on the send of the message.

       On success, sctp_sendmsg returns the number of bytes sent or -1  if  an
       error occurred.

       sctp(7)  sctp_bindx(3),  sctp_connectx(3), sctp_sendv(3), sctp_send(3),
       sctp_recvmsg(3),  sctp_recvv(3),  sctp_peeloff(3),   sctp_getpaddrs(3),
       sctp_getladdrs(3), sctp_opt_info(3),

Linux 2.6                         2004-10-25                   SCTP_SENDMSG(3)
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