sctp_connectx - initiate a connection on an SCTP socket using multiple
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_sendv(3),
sctp_send(3),
sctp_recvmsg(3),
sctp_recvv(3),
sctp_peeloff(3),
sctp_getpaddrs(3),
sctp_getladdrs(3),
sctp_opt_info(3),