3 * $Id: conn.c,v 1.10 2004/04/08 01:36:11 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 /*----- Header files ------------------------------------------------------*/
38 #include <sys/types.h>
39 #include <sys/socket.h>
47 /*----- Main code ---------------------------------------------------------*/
49 /* --- @conn_connect@ --- *
51 * Arguments: @int fd@ = file descriptor to try to connect
52 * @unsigned mode@ = what we can do to the file
53 * @void *p@ = pointer to connection context
57 * Use: Handles select results for pending connections.
60 static void conn_connect(int fd
, unsigned mode
, void *p
)
63 # define PATH_MAX 1024
67 char buf
[PATH_MAX
+ 8]; /* Big enough */
71 sel_rmfile(&c
->writer
);
72 if (getpeername(fd
, (struct sockaddr
*)buf
, &sinsz
) < 0) {
74 size_t errsz
= sizeof(err
);
75 if (getsockopt(fd
, SOL_SOCKET
, SO_ERROR
, &err
, &errsz
) == 0)
83 /* --- @conn_fd@ --- *
85 * Arguments: @conn *c@ = pointer to connection block
86 * @sel_state *s@ = pointer to select state to attach to
87 * @int fd@ = file descriptor of socket
88 * @void (*func)(int fd, void *p) = handler function
89 * @void *p@ = argument for the handler function
93 * Use: Sets up a nonblocking connect job. The socket should have a
94 * connect pending for it already.
97 void conn_fd(conn
*c
, sel_state
*s
, int fd
,
98 void (*func
)(int /*fd*/, void */
*p*/
),
103 sel_initfile(s
, &c
->writer
, fd
, SEL_WRITE
, conn_connect
, c
);
104 sel_addfile(&c
->writer
);
107 /* --- @conn_init@ --- *
109 * Arguments: @conn *c@ = pointer to connection block
110 * @sel_state *s@ = pointer to select state to attach to
111 * @int fd@ = file descriptor of socket to connect
112 * @struct sockaddr *dst@ = destination address
113 * @int dsz@ = size of destination address
114 * @void (*func)(int fd, void *p) = handler function
115 * @void *p@ = argument for the handler function
117 * Returns: Zero on success, nonzero on failure.
119 * Use: Sets up a nonblocking connect job. The socket should already
120 * be bound if you care about that sort of thing. When the
121 * connection completes, the handler function is called with the
122 * connected socket as an argument. If the connect fails rather
123 * than completes, the socket is closed, and the handler is
124 * informed of this by being passed a negative file descriptor.
125 * In either case, the select job is then removed.
128 int conn_init(conn
*c
, sel_state
*s
, int fd
,
129 struct sockaddr
*dst
, int dsz
,
130 void (*func
)(int /*fd*/, void */
*p*/
),
135 if ((f
= fcntl(fd
, F_GETFL
)) < 0 || fcntl(fd
, F_SETFL
, f
| O_NONBLOCK
))
138 if (!connect(fd
, dst
, dsz
))
140 else if (errno
!= EINPROGRESS
)
143 conn_fd(c
, s
, fd
, func
, p
);
151 /* --- @conn_kill@ --- *
153 * Arguments: @conn *c@ = pointer to connection to dispose of
157 * Use: Disposes of a connection when it's not wanted any more.
160 void conn_kill(conn
*c
)
162 if (c
->writer
.fd
!= -1) {
164 sel_rmfile(&c
->writer
);
169 /*----- That's all, folks -------------------------------------------------*/