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>
41 #include <netinet/udp.h>
44 #include "gdb_string.h"
46 static int net_open (struct serial *scb, const char *name);
47 static void net_close (struct serial *scb);
48 extern int (*ui_loop_hook) (int);
49 void _initialize_ser_tcp (void);
51 /* seconds to wait for connect */
53 /* how many times per second to poll ui_loop_hook */
54 #define POLL_INTERVAL 2
56 /* Open a tcp socket */
59 net_open (struct serial *scb, const char *name)
61 char *port_str, hostname[100];
64 struct hostent *hostent;
65 struct sockaddr_in sockaddr;
68 if (strncmp (name, "udp:", 4) == 0)
73 else if (strncmp (name, "tcp:", 4) == 0)
76 port_str = strchr (name, ':');
79 error ("net_open: No colon in host name!"); /* Shouldn't ever happen */
81 tmp = min (port_str - name, (int) sizeof hostname - 1);
82 strncpy (hostname, name, tmp); /* Don't want colon */
83 hostname[tmp] = '\000'; /* Tie off host name */
84 port = atoi (port_str + 1);
86 /* default hostname is localhost */
88 strcpy (hostname, "localhost");
90 hostent = gethostbyname (hostname);
93 fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
99 scb->fd = socket (PF_INET, SOCK_DGRAM, 0);
101 scb->fd = socket (PF_INET, SOCK_STREAM, 0);
106 sockaddr.sin_family = PF_INET;
107 sockaddr.sin_port = htons (port);
108 memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr,
109 sizeof (struct in_addr));
111 /* set socket nonblocking */
113 ioctl (scb->fd, FIONBIO, &tmp);
115 /* Use Non-blocking connect. connect() will return 0 if connected already. */
116 n = connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr));
118 if (n < 0 && errno != EINPROGRESS)
126 /* looks like we need to wait for the connect */
134 /* While we wait for the connect to complete
135 poll the UI so it can update or the user can
139 if (ui_loop_hook (0))
147 FD_SET (scb->fd, &rset);
150 t.tv_usec = 1000000 / POLL_INTERVAL;
152 n = select (scb->fd + 1, &rset, &wset, NULL, &t);
155 while (n == 0 && polls <= TIMEOUT * POLL_INTERVAL);
156 if (n < 0 || polls > TIMEOUT * POLL_INTERVAL)
158 if (polls > TIMEOUT * POLL_INTERVAL)
165 /* Got something. Is it an error? */
169 res = getsockopt (scb->fd, SOL_SOCKET, SO_ERROR, &err, &len);
179 /* turn off nonblocking */
181 ioctl (scb->fd, FIONBIO, &tmp);
185 /* Disable Nagle algorithm. Needed in some cases. */
187 setsockopt (scb->fd, IPPROTO_TCP, TCP_NODELAY,
188 (char *)&tmp, sizeof (tmp));
191 /* If we don't do this, then GDB simply exits
192 when the remote side dies. */
193 signal (SIGPIPE, SIG_IGN);
199 net_close (struct serial *scb)
209 _initialize_ser_tcp (void)
211 struct serial_ops *ops = XMALLOC (struct serial_ops);
212 memset (ops, sizeof (struct serial_ops), 0);
215 ops->open = net_open;
216 ops->close = net_close;
217 ops->readchar = ser_unix_readchar;
218 ops->write = ser_unix_write;
219 ops->flush_output = ser_unix_nop_flush_output;
220 ops->flush_input = ser_unix_flush_input;
221 ops->send_break = ser_unix_nop_send_break;
222 ops->go_raw = ser_unix_nop_raw;
223 ops->get_tty_state = ser_unix_nop_get_tty_state;
224 ops->set_tty_state = ser_unix_nop_set_tty_state;
225 ops->print_tty_state = ser_unix_nop_print_tty_state;
226 ops->noflush_set_tty_state = ser_unix_nop_noflush_set_tty_state;
227 ops->setbaudrate = ser_unix_nop_setbaudrate;
228 ops->setstopbits = ser_unix_nop_setstopbits;
229 ops->drain_output = ser_unix_nop_drain_output;
230 ops->async = ser_unix_async;
231 serial_add_interface (ops);