Sockets Library Functions connect(3SOCKET) NAME connect - initiate a connection on a socket SYNOPSIS cc [ _f_l_a_g ... ] _f_i_l_e ... -lsocket -lnsl [ _l_i_b_r_a_r_y ... ] #include #include int connect(int s, const struct sockaddr *name, int namelen); DESCRIPTION The parameter _s is a socket. If it is of type SOCK_DGRAM, connect() specifies the peer with which the socket is to be associated; this address is the address to which datagrams are to be sent if a receiver is not explicitly designated; it is the only address from which datagrams are to be received. If the socket _s is of type SOCK_STREAM, connect() attempts to make a connection to another socket. The other socket is specified by _n_a_m_e. _n_a_m_e is an address in the com- munication space of the socket. Each communication space interprets the _n_a_m_e parameter in its own way. If _s is not bound, then it will be bound to an address selected by the underlying transport provider. Generally, stream sockets may successfully connect() only once; datagram sockets may use connect() multiple times to change their association. Datagram sockets may dissolve the association by connecting to a null address. RETURN VALUES If the connection or binding succeeds, 0 is returned. Oth- erwise, -1 is returned and sets errno to indicate the error. ERRORS The call fails if: EACCES Search permission is denied for a component of the path prefix of the pathname in _n_a_m_e. EADDRINUSE The address is already in use. EADDRNOTAVAIL The specified address is not available on the remote machine. EAFNOSUPPORT Addresses in the specified address family cannot be used with this socket. EALREADY SunOS 5.8 Last change: 22 Oct 1999 1 Sockets Library Functions connect(3SOCKET) The socket is non-blocking and a previous connection attempt has not yet been completed. EBADF _s is not a valid descriptor. ECONNREFUSED The attempt to connect was forcefully rejected. The calling program should close(2) the socket descriptor, and issue another socket(3SOCKET) call to obtain a new descriptor before attempting another connect() call. EINPROGRESS The socket is non-blocking and the connection cannot be completed immediately. It is possible to select(3C) for completion by selecting the socket for writing. However, this is only possible if the socket STREAMS module is the topmost module on the protocol stack with a write service procedure. This will be the nor- mal case. EINTR The connection attempt was interrupted before any data arrived by the delivery of a signal. EINVAL _n_a_m_e_l_e_n is not the size of a valid address for the specified address family. EIO An I/O error occurred while reading from or writing to the file system. EISCONN The socket is already connected. ELOOP Too many symbolic links were encountered in translat- ing the pathname in _n_a_m_e. ENETUNREACH The network is not reachable from this host. ENOENT A component of the path prefix of the pathname in _n_a_m_e does not exist. ENOENT The socket referred to by the pathname in _n_a_m_e does not exist. ENOSR There were insufficient STREAMS resources available to complete the operation. ENXIO The server exited before the connection was complete. SunOS 5.8 Last change: 22 Oct 1999 2 Sockets Library Functions connect(3SOCKET) ETIMEDOUT Connection establishment timed out without establish- ing a connection. EWOULDBLOCK The socket is marked as non-blocking, and the requested operation would block. The following errors are specific to connecting names in the UNIX domain. These errors may not apply in future versions of the UNIX IPC domain. ENOTDIR A component of the path prefix of the pathname in _n_a_m_e is not a directory. ENOTSOCK _s is not a socket. ENOTSOCK _n_a_m_e is not a socket. EPROTOTYPE The file referred to by _n_a_m_e is a socket of a type other than type _s (for example, _s is a SOCK_DGRAM socket, while _n_a_m_e refers to a SOCK_STREAM socket). ATTRIBUTES See attributes(5) for descriptions of the following attri- butes: ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |______________________________|______________________________| | MT-Level | Safe | |______________________________|______________________________| SEE ALSO close(2), accept(3SOCKET), getsockname(3SOCKET), select(3C), socket(3SOCKET), attributes(5), socket(3HEAD) SunOS 5.8 Last change: 22 Oct 1999 3