отправляйте сообщения из сокета SCTP с возможностью расширения (Send messages from a SCTP socket with an extensible way.)
Имя (Name)
sctp_sendv - Send messages from a SCTP socket with an extensible
way.
Синопсис (Synopsis)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/sctp.h>
int sctp_sendv(int sd, const struct iovec * iov, int iovcnt,
struct sockaddr *addrs, int addrcnt, void * info,
socklen_t infolen, unsigned int infotype, int flags);
Описание (Description)
sctp_sendv provides an extensible way for an application to
communicate different send attributes to the SCTP stack when
sending a message. There are three types of attributes that can
be used to describe a message to be sent. They are struct
sctp_sndinfo, struct sctp_prinfo, and struct sctp_authinfo. The
following structure, sctp_sendv_spa, is defined to be used when
more than one of the above attributes are needed to describe a
message to be sent.
struct sctp_sendv_spa {
uint32_t sendv_flags;
struct sctp_sndinfo sendv_sndinfo;
struct sctp_prinfo sendv_prinfo;
struct sctp_authinfo sendv_authinfo;
};
The sendv_flags field holds a bitwise OR of
SCTP_SEND_SNDINFO_VALID, SCTP_SEND_PRINFO_VALID, and
SCTP_SEND_AUTHINFO_VALID indicating if the
sendv_sndinfo/sendv_prinfo/sendv_authinfo fields contain valid
information.
sd is the socket descriptor. iov is the gather buffer, the data
in the buffer is treated as a single user message. iovcnt is the
number of elements in iov. addrs is an array of addresses to be
used to set up an association or a single address to be used to
send the message, and NULL is passed in if the caller neither
wants to set up an association nor wants to send the message to a
specific address. addrcnt is the number of addresses in the
addrs array. info is a pointer to the buffer containing the
attribute associated with the message to be sent, and the type
is indicated by the info_type parameter. infolen is the length
of info, in bytes. infotype identifies the type of the
information provided in info ,and the current defined values are
as follows:
SCTP_SENDV_NOINFO
No information is provided. The parameter info is a NULL
pointer, and infolen is 0.
SCTP_SENDV_SNDINFO
The parameter info is pointing to a struct sctp_sndinfo.
SCTP_SENDV_PRINFO
The parameter info is pointing to a struct sctp_prinfo.
SCTP_SENDV_AUTHINFO
The parameter info is pointing to a struct sctp_authinfo.
SCTP_SENDV_SPA
The parameter info is pointing to a struct sctp_sendv_spa.
flags The same flags as used by the sendmsg() call flags (e.g.,
MSG_DONTROUTE).
Возвращаемое значение (Return value)
On success, sctp_sendv returns the number of bytes sent or -1 if
an error occurred.
Смотри также (See also)
sctp(7) sctp_bindx(3), sctp_connectx(3), sctp_send(3),
sctp_recvmsg(3), sctp_recvv(3), sctp_peeloff(3),
sctp_getpaddrs(3), sctp_getladdrs(3), sctp_opt_info(3),
