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 #include <netinet/in.h>
29 #include <arpa/inet.h>
31 #include <sys/socket.h>
32 #include <netinet/tcp.h>
35 #include "gdb_string.h"
37 static int tcp_open (struct serial *scb, const char *name);
38 static void tcp_close (struct serial *scb);
40 void _initialize_ser_tcp (void);
42 /* Open up a raw tcp socket */
45 tcp_open (struct serial *scb, const char *name)
49 struct hostent *hostent;
50 struct sockaddr_in sockaddr;
53 struct protoent *protoent;
56 port_str = strchr (name, ':');
59 error ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */
61 tmp = min (port_str - name, (int) sizeof hostname - 1);
62 strncpy (hostname, name, tmp); /* Don't want colon */
63 hostname[tmp] = '\000'; /* Tie off host name */
64 port = atoi (port_str + 1);
67 strcpy (hostname, "localhost");
69 hostent = gethostbyname (hostname);
73 fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
78 for (i = 1; i <= 15; i++)
80 scb->fd = socket (PF_INET, SOCK_STREAM, 0);
84 /* Allow rapid reuse of this port. */
86 setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp));
88 /* Enable TCP keep alive process. */
90 setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
92 sockaddr.sin_family = PF_INET;
93 sockaddr.sin_port = htons (port);
94 memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr,
95 sizeof (struct in_addr));
97 if (!connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr)))
103 /* We retry for ECONNREFUSED because that is often a temporary condition, which
104 happens when the server is being restarted. */
106 if (errno != ECONNREFUSED)
112 protoent = getprotobyname ("tcp");
117 if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY,
118 (char *) &tmp, sizeof (tmp)))
121 signal (SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits
122 when the remote side dies. */
128 tcp_close (struct serial *scb)
138 _initialize_ser_tcp (void)
140 struct serial_ops *ops = XMALLOC (struct serial_ops);
141 memset (ops, sizeof (struct serial_ops), 0);
144 ops->open = tcp_open;
145 ops->close = tcp_close;
146 ops->readchar = ser_unix_readchar;
147 ops->write = ser_unix_write;
148 ops->flush_output = ser_unix_nop_flush_output;
149 ops->flush_input = ser_unix_flush_input;
150 ops->send_break = ser_unix_nop_send_break;
151 ops->go_raw = ser_unix_nop_raw;
152 ops->get_tty_state = ser_unix_nop_get_tty_state;
153 ops->set_tty_state = ser_unix_nop_set_tty_state;
154 ops->print_tty_state = ser_unix_nop_print_tty_state;
155 ops->noflush_set_tty_state = ser_unix_nop_noflush_set_tty_state;
156 ops->setbaudrate = ser_unix_nop_setbaudrate;
157 ops->setstopbits = ser_unix_nop_setstopbits;
158 ops->drain_output = ser_unix_nop_drain_output;
159 ops->async = ser_unix_async;
160 serial_add_interface (ops);