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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 $
34 .\" $DragonFly: src/lib/libc/sys/connect.2,v 1.3 2007/07/30 22:11:33 swildner Exp $
41 .Nd initiate a connection on a socket
48 .Fn connect "int s" "const struct sockaddr *name" "socklen_t namelen"
55 this call specifies the peer with which the socket is to be associated;
56 this address is that to which datagrams are to be sent,
57 and the only address from which datagrams are to be received.
58 If the socket is of type
60 this call attempts to make a connection to
62 The other socket is specified by
64 which is an address in the communications space of the socket.
65 Each communications space interprets the
67 parameter in its own way.
68 Generally, stream sockets may successfully
70 only once; datagram sockets may use
72 multiple times to change their association.
73 Datagram sockets may dissolve the association
74 by connecting to an invalid address, such as a null address.
84 is not a valid descriptor.
87 is a descriptor for a file, not a socket.
88 .It Bq Er EADDRNOTAVAIL
89 The specified address is not available on this machine.
90 .It Bq Er EAFNOSUPPORT
91 Addresses in the specified address family cannot be used with this socket.
93 The socket is already connected.
95 Connection establishment timed out without establishing a connection.
96 .It Bq Er ECONNREFUSED
97 The attempt to connect was forcefully rejected.
99 The network is not reachable from this host.
100 .It Bq Er EHOSTUNREACH
101 The remote host is not reachable from this host.
103 The address is already in use.
107 parameter specifies an area outside
108 the process address space.
109 .It Bq Er EINPROGRESS
110 The socket is non-blocking
111 and the connection cannot
112 be completed immediately.
115 for completion by selecting the socket for writing.
117 The socket is non-blocking
118 and a previous connection attempt
119 has not yet been completed.
122 The following errors are specific to connecting names in the
125 These errors may not apply in future versions of the
130 A component of the path prefix is not a directory.
131 .It Bq Er ENAMETOOLONG
132 A component of a pathname exceeded 255 characters,
133 or an entire path name exceeded 1023 characters.
135 The named socket does not exist.
137 Search permission is denied for a component of the path prefix.
139 Write access to the named socket is denied.
141 Too many symbolic links were encountered in translating the pathname.
152 function call appeared in