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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | COLOPHON |
SCTP_CONNECTX(3) Linux Programmer's Manual SCTP_CONNECTX(3)
sctp_connectx - initiate a connection on an SCTP socket using multi‐
ple destination addresses.
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/sctp.h>
int sctp_connectx(int sd, struct sockaddr * addrs, int addrcnt,
sctp_assoc_t * id);
sctp_connectx initiates a connection to a set of addresses passed in
the array addrs to/from the socket sd. addrcnt is the number of
addresses in the array.
If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
If sd is an IPv6 socket, the addresses passed can be either IPv4 or
IPv6 addresses.
addrs is a pointer to an array of one or more socket addresses. Each
address is contained in its appropriate structure(i.e. struct
sockaddr_in or struct sockaddr_in6). The family of the address type
must be used to distinguish the address length. The caller specifies
the number of addresses in the array with addrcnt.
id is a pointer to the association id and, if provided, will be set
to the identifier of the newly created association.
On success, 0 is returned. On failure, -1 is returned, and errno is
set appropriately.
EBADF sd is not a valid descriptor.
ENOTSOCK
sd is a descriptor for a file, not a socket.
EFAULT Error while copying in or out from the user address space.
EINVAL Invalid port or address.
EACCES The address is protected, and the user is not the super-user.
EISCONN
The socket is already connected.
ECONNREFUSED
No one listening on the remote address.
ETIMEDOUT
Timeout while attempting connection. The server may be too
busy to accept new connections. Note that for IP sockets the
timeout may be very long when syncookies are enabled on the
server.
ENETUNREACH
Network is unreachable.
EADDRINUSE
Local address is already in use.
EINPROGRESS
The socket is non-blocking and the connection cannot be
completed immediately. It is possible to select(2) or poll(2)
for completion by selecting the socket for writing. After
select indicates writability, use getsockopt(2) to read the
SO_ERROR option at level SOL_SOCKET to determine whether
connect completed successfully (SO_ERROR is zero) or
unsuccessfully (SO_ERROR is one of the usual error codes
listed here, explaining the reason for the failure).
EALREADY
The socket is non-blocking and a previous connection attempt
has not yet been completed.
EAGAIN No more free local ports or insufficient entries in the
routing cache. For PF_INET see the
net.ipv4.ip_local_port_range sysctl in ip(7) on how to
increase the number of local ports.
EAFNOSUPPORT
The passed address didn't have the correct address family in
its sa_family field.
EACCES, EPERM
The user tried to connect to a broadcast address without
having the socket broadcast flag enabled or the connection
request failed because of a local firewall rule.
sctp(7) sctp_bindx(3), sctp_sendmsg(3), sctp_send(3),
sctp_recvmsg(3), sctp_peeloff(3), sctp_getpaddrs(3),
sctp_getladdrs(3), sctp_opt_info(3),
This page is part of the lksctp-tools (Linux kernel SCTP tools)
project. Information about the project can be found at
⟨http://lksctp.org/⟩. If you have a bug report for this manual page,
send it to sctp@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://github.com/sctp/lksctp-tools.git⟩ on 2017-07-05. If you dis‐
cover 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 man-pages@man7.org
Linux 2.6 2005-10-25 SCTP_CONNECTX(3)
Pages that refer to this page: sctp_bindx(3), sctp_getladdrs(3), sctp_getpaddrs(3), sctp_opt_info(3), sctp_peeloff(3), sctp_recvmsg(3), sctp_sendmsg(3), sctp(7)