1 /* Serial interface for raw TCP connections on Un*x like systems
2 Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #include <sys/types.h>
28 #ifdef HAVE_SYS_FILIO_H
29 #include <sys/filio.h> /* For FIONBIO. */
31 #ifdef HAVE_SYS_IOCTL_H
32 #include <sys/ioctl.h> /* For FIONBIO. */
36 #include <netinet/in.h>
37 #include <arpa/inet.h>
39 #include <sys/socket.h>
40 #include <netinet/tcp.h>
43 #include "gdb_string.h"
45 static int net_open (struct serial
*scb
, const char *name
);
46 static void net_close (struct serial
*scb
);
47 extern int (*ui_loop_hook
) (int);
48 void _initialize_ser_tcp (void);
50 /* seconds to wait for connect */
52 /* how many times per second to poll ui_loop_hook */
53 #define POLL_INTERVAL 2
55 /* Open a tcp socket */
58 net_open (struct serial
*scb
, const char *name
)
60 char *port_str
, hostname
[100];
63 struct hostent
*hostent
;
64 struct sockaddr_in sockaddr
;
67 if (strncmp (name
, "udp:", 4) == 0)
72 else if (strncmp (name
, "tcp:", 4) == 0)
75 port_str
= strchr (name
, ':');
78 error ("net_open: No colon in host name!"); /* Shouldn't ever happen */
80 tmp
= min (port_str
- name
, (int) sizeof hostname
- 1);
81 strncpy (hostname
, name
, tmp
); /* Don't want colon */
82 hostname
[tmp
] = '\000'; /* Tie off host name */
83 port
= atoi (port_str
+ 1);
85 /* default hostname is localhost */
87 strcpy (hostname
, "localhost");
89 hostent
= gethostbyname (hostname
);
92 fprintf_unfiltered (gdb_stderr
, "%s: unknown host\n", hostname
);
98 scb
->fd
= socket (PF_INET
, SOCK_DGRAM
, 0);
100 scb
->fd
= socket (PF_INET
, SOCK_STREAM
, 0);
105 sockaddr
.sin_family
= PF_INET
;
106 sockaddr
.sin_port
= htons (port
);
107 memcpy (&sockaddr
.sin_addr
.s_addr
, hostent
->h_addr
,
108 sizeof (struct in_addr
));
110 /* set socket nonblocking */
112 ioctl (scb
->fd
, FIONBIO
, &tmp
);
114 /* Use Non-blocking connect. connect() will return 0 if connected already. */
115 n
= connect (scb
->fd
, (struct sockaddr
*) &sockaddr
, sizeof (sockaddr
));
117 if (n
< 0 && errno
!= EINPROGRESS
)
125 /* looks like we need to wait for the connect */
133 /* While we wait for the connect to complete
134 poll the UI so it can update or the user can
138 if (ui_loop_hook (0))
146 FD_SET (scb
->fd
, &rset
);
149 t
.tv_usec
= 1000000 / POLL_INTERVAL
;
151 n
= select (scb
->fd
+ 1, &rset
, &wset
, NULL
, &t
);
154 while (n
== 0 && polls
<= TIMEOUT
* POLL_INTERVAL
);
155 if (n
< 0 || polls
> TIMEOUT
* POLL_INTERVAL
)
157 if (polls
> TIMEOUT
* POLL_INTERVAL
)
164 /* Got something. Is it an error? */
168 res
= getsockopt (scb
->fd
, SOL_SOCKET
, SO_ERROR
, &err
, &len
);
178 /* turn off nonblocking */
180 ioctl (scb
->fd
, FIONBIO
, &tmp
);
184 /* Disable Nagle algorithm. Needed in some cases. */
186 setsockopt (scb
->fd
, IPPROTO_TCP
, TCP_NODELAY
,
187 (char *)&tmp
, sizeof (tmp
));
190 /* If we don't do this, then GDB simply exits
191 when the remote side dies. */
192 signal (SIGPIPE
, SIG_IGN
);
198 net_close (struct serial
*scb
)
208 _initialize_ser_tcp (void)
210 struct serial_ops
*ops
= XMALLOC (struct serial_ops
);
211 memset (ops
, sizeof (struct serial_ops
), 0);
214 ops
->open
= net_open
;
215 ops
->close
= net_close
;
216 ops
->readchar
= ser_unix_readchar
;
217 ops
->write
= ser_unix_write
;
218 ops
->flush_output
= ser_unix_nop_flush_output
;
219 ops
->flush_input
= ser_unix_flush_input
;
220 ops
->send_break
= ser_unix_nop_send_break
;
221 ops
->go_raw
= ser_unix_nop_raw
;
222 ops
->get_tty_state
= ser_unix_nop_get_tty_state
;
223 ops
->set_tty_state
= ser_unix_nop_set_tty_state
;
224 ops
->print_tty_state
= ser_unix_nop_print_tty_state
;
225 ops
->noflush_set_tty_state
= ser_unix_nop_noflush_set_tty_state
;
226 ops
->setbaudrate
= ser_unix_nop_setbaudrate
;
227 ops
->setstopbits
= ser_unix_nop_setstopbits
;
228 ops
->drain_output
= ser_unix_nop_drain_output
;
229 ops
->async
= ser_unix_async
;
230 serial_add_interface (ops
);