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32 .\" @(#)connect.2 8.1 (Berkeley) 6/4/93
33 .\" $FreeBSD: src/lib/libc/sys/connect.2,v 1.11.2.8 2003/04/05 16:59:01 ceri Exp $
40 .Nd initiate a connection on a socket
47 .Fn connect "int s" "const struct sockaddr *name" "socklen_t namelen"
54 this call specifies the peer with which the socket is to be associated;
55 this address is that to which datagrams are to be sent,
56 and the only address from which datagrams are to be received.
57 If the socket is of type
59 this call attempts to make a connection to
61 The other socket is specified by
63 which is an address in the communications space of the socket.
64 Each communications space interprets the
66 parameter in its own way.
67 Generally, stream sockets may successfully
69 only once; datagram sockets may use
71 multiple times to change their association.
72 Datagram sockets may dissolve the association
73 by connecting to an invalid address, such as a null address.
83 is not a valid descriptor.
86 is a descriptor for a file, not a socket.
87 .It Bq Er EADDRNOTAVAIL
88 The specified address is not available on this machine.
89 .It Bq Er EAFNOSUPPORT
90 Addresses in the specified address family cannot be used with this socket.
92 The socket is already connected.
94 Connection establishment timed out without establishing a connection.
95 .It Bq Er ECONNREFUSED
96 The attempt to connect was forcefully rejected.
98 The network is not reachable from this host.
99 .It Bq Er EHOSTUNREACH
100 The remote host is not reachable from this host.
102 The address is already in use.
106 parameter specifies an area outside
107 the process address space.
108 .It Bq Er EINPROGRESS
109 The socket is non-blocking
110 and the connection cannot
111 be completed immediately.
114 for completion by selecting the socket for writing.
116 The socket is non-blocking
117 and a previous connection attempt
118 has not yet been completed.
121 The following errors are specific to connecting names in the UNIX domain.
122 These errors may not apply in future versions of the UNIX IPC domain.
125 A component of the path prefix is not a directory.
126 .It Bq Er ENAMETOOLONG
127 A component of a pathname exceeded 255 characters,
128 or an entire path name exceeded 1023 characters.
130 The named socket does not exist.
132 Search permission is denied for a component of the path prefix.
134 Write access to the named socket is denied.
136 Too many symbolic links were encountered in translating the pathname.
147 function call appeared in