sctp_sendmsg(3) — Linux manual page


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

NAME         top

       sctp_sendmsg - Send a message from a SCTP socket.

SYNOPSIS         top

       #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);

DESCRIPTION         top

       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

              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 undelivered message if an error occurs on the send of the

RETURN VALUE         top

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

SEE ALSO         top

       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),

COLOPHON         top

       This page is part of the lksctp-tools (Linux kernel SCTP tools)
       project.  Information about the project can be found at [unknown --
       if you know, please contact] If you have a bug
       report for this manual page, send it to  This
       page was obtained from the project's upstream Git repository
       ⟨⟩ on 2020-08-13.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2019-05-02.)  If you discover any rendering problems
       in this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to

Linux 2.6                        2004-10-25                  SCTP_SENDMSG(3)

Pages that refer to this page: sctp_bindx(3)sctp_connectx(3)sctp_getladdrs(3)sctp_getpaddrs(3)sctp_opt_info(3)sctp_optinfo(3)sctp_peeloff(3)sctp_recvmsg(3)sctp_recvv(3)sctp_send(3)sctp(7)