sctp_connectx(3) [debian man page]
SCTP_CONNECTX(3) Linux Programmer's Manual SCTP_CONNECTX(3) NAME
sctp_connectx - initiate a connection on an SCTP socket using multiple destination addresses. SYNOPSIS
#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); DESCRIPTION
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 sock- addr_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. RETURN VALUE
On success, 0 is returned. On failure, -1 is returned, and errno is set appropriately. ERRORS
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 comple- tion 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. SEE ALSO
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), Linux 2.6 2005-10-25 SCTP_CONNECTX(3)
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sctp_bindx(3SOCKET) Sockets Library Functions sctp_bindx(3SOCKET) NAME
sctp_bindx - add or remove IP addresses to or from an SCTP socket SYNOPSIS
cc [ flag... ] file... -lsocket -lnsl -lsctp [ library... ] #include <sys/types.h> #include <sys/socket.h> #include <netinet/sctp.h> int sctp_bindx(int sock, void *addrs, int addrcnt, int flags); DESCRIPTION
The sctp_bindx() function adds or removes addresses to or from an SCTP socket. If sock is an Internet Protocol Version 4 (IPv4) socket, addrs should be an array of sockaddr_in structures containing IPv4 addresses. If sock is an Internet Protocol Version 6 (IPv6) socket, addrs should be an array of sockaddr_in6 structures containing IPv6 or IPv4-mapped IPv6 addresses. The addrcnt is the number of array ele- ments in addrs. The family of the address type is used with addrcnt to determine the size of the array. The flags parameter is a bitmask that indicates whether addresses are to be added or removed from a socket. The flags parameter is formed by bitwise OR of zero or more of the following flags: SCTP_BINDX_ADD_ADDR Indicates that addresses from addrs should be added to the SCTP socket. SCTP_BINDX_REM_ADDR Indicates that addresses from addrs should be removed from the SCTP socket. These two flags are mutually exclusive. If flags is formed by a bitwise OR of both SCTP_BINDX_ADD_ADDR and SCTP_BINDX_REM_ADDR, the sctp_bindx() function will fail. Prior to calling sctp_bindx() on an SCTP endpoint, the endpoint should be bound using bind(3SOCKET). On a listening socket, a special INADDR_ANY value for IP or an unspecified address of all zeros for IPv6 can be used in addrs to add all IPv4 or IPv6 addresses on the sys- tem to the socket. The sctp_bindx() function can also be used to add or remove addresses to or from an established association. In such a case, messages are exchanged between the SCTP endpoints to update the address lists for that association if both endpoints support dynamic address reconfiguration. RETURN VALUES
Upon successful completion, the sctp_bindx() function returns 0. Otherwise, the function returns -1 and sets errno to indicate the error. ERRORS
The sctp_bindx() call fails under the following conditions. EBADF The sock argument is an invalid file descriptor. ENOTSOCK The sock argument is not a socket. EINVAL One or more of the IPv4 or IPv6 addresses is invalid. EINVAL The endpoint is not bound. EINVAL The last address is requested to be removed from an established association. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
bind(3SOCKET), in.h(3HEAD), libsctp(3LIB), listen(3SOCKET), sctp_freeladdrs(3SOCKET), sctp_freepaddrs(3SOCKET), sctp_getladdrs(3SOCKET), sctp_getpaddrs(3SOCKET), socket(3SOCKET), inet(7P), inet6(7P), ip(7P), ip6(7P), sctp(7P) NOTES
IPv4-mapped addresses are not recommended. SunOS 5.11 22 Aug 2007 sctp_bindx(3SOCKET)