3 * $Id: conn.c,v 1.4 1999/07/26 23:21:02 mdw Exp $
5 * Nonblocking connect handling
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the mLib utilities library.
14 * mLib is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * mLib is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with mLib; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.4 1999/07/26 23:21:02 mdw
34 * Bug fix: remove the selector before doing the callback, in case client
35 * adds a writer for the connected socket.
37 * Revision 1.3 1999/05/23 12:12:37 mdw
38 * Interface change to make the `conn' selector useful for generic stream
39 * sockets rather than just IPv4 ones.
41 * Revision 1.2 1999/05/15 10:33:32 mdw
42 * Fix copyright notices.
44 * Revision 1.1 1999/05/14 21:01:14 mdw
45 * Integrated `select' handling bits from the background resolver project.
49 /*----- Header files ------------------------------------------------------*/
57 #include <sys/types.h>
58 #include <sys/socket.h>
66 /*----- Main code ---------------------------------------------------------*/
68 /* --- @conn_connect@ --- *
70 * Arguments: @int fd@ = file descriptor to try to connect
71 * @unsigned mode@ = what we can do to the file
72 * @void *p@ = pointer to connection context
76 * Use: Handles select results for pending connections.
79 static void conn_connect(int fd
, unsigned mode
, void *p
)
82 # define PATH_MAX 1024
86 char buf
[PATH_MAX
+ 8]; /* Big enough */
90 sel_rmfile(&c
->writer
);
91 if (getpeername(fd
, (struct sockaddr
*)buf
, &sinsz
) < 0) {
93 int errsz
= sizeof(err
);
94 if (getsockopt(fd
, SOL_SOCKET
, SO_ERROR
, &err
, &errsz
) == 0)
102 /* --- @conn_init@ --- *
104 * Arguments: @conn *c@ = pointer to connection block
105 * @sel_state *s@ = pointer to select state to attach to
106 * @int fd@ = file descriptor of socket to connect
107 * @struct sockaddr *dst@ = destination address
108 * @int dsz@ = size of destination address
109 * @void (*func)(int fd, void *p) = handler function
110 * @void *p@ = argument for the handler function
114 * Use: Sets up a nonblocking connect job. The socket should already
115 * be bound if you care about that sort of thing. When the
116 * connection completes, the handler function is called with the
117 * connected socket as an argument. If the connect fails rather
118 * than completes, the socket is closed, and the handler is
119 * informed of this by being passed a negative file descriptor.
120 * In either case, the select job is then removed.
123 void conn_init(conn
*c
, sel_state
*s
, int fd
,
124 struct sockaddr
*dst
, int dsz
,
125 void (*func
)(int /*fd*/, void */
*p*/
),
130 if ((f
= fcntl(fd
, F_GETFL
)) < 0 ||
131 fcntl(fd
, F_SETFL
, f
| O_NONBLOCK
))
134 if (connect(fd
, dst
, dsz
) < 0) {
135 if (errno
!= EINPROGRESS
)
139 sel_initfile(s
, &c
->writer
, fd
, SEL_WRITE
, conn_connect
, c
);
140 sel_addfile(&c
->writer
);
146 /* --- Something went pear-shaped --- */
153 /* --- @conn_kill@ --- *
155 * Arguments: @conn *c@ = pointer to connection to dispose of
159 * Use: Disposes of a connection when it's not wanted any more.
162 void conn_kill(conn
*c
)
164 if (c
->writer
.fd
!= -1) {
166 sel_rmfile(&c
->writer
);
171 /*----- That's all, folks -------------------------------------------------*/