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[/] [or1k/] [trunk/] [insight/] [gdb/] [ser-tcp.c] - Blame information for rev 1765

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1 578 markom
/* Serial interface for raw TCP connections on Un*x like systems
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   Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001
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   Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place - Suite 330,
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   Boston, MA 02111-1307, USA.  */
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#include "defs.h"
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#include "serial.h"
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#include "ser-unix.h"
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#include <sys/types.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <netinet/tcp.h>
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#include <signal.h>
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#include "gdb_string.h"
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static int tcp_open (serial_t scb, const char *name);
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static void tcp_close (serial_t scb);
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void _initialize_ser_tcp (void);
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/* Open up a raw tcp socket */
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static int
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tcp_open (serial_t scb, const char *name)
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{
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  char *port_str;
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  int port;
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  struct hostent *hostent;
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  struct sockaddr_in sockaddr;
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  int tmp;
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  char hostname[100];
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  struct protoent *protoent;
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  int i;
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  port_str = strchr (name, ':');
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  if (!port_str)
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    error ("tcp_open: No colon in host name!");         /* Shouldn't ever happen */
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  tmp = min (port_str - name, (int) sizeof hostname - 1);
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  strncpy (hostname, name, tmp);        /* Don't want colon */
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  hostname[tmp] = '\000';       /* Tie off host name */
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  port = atoi (port_str + 1);
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  hostent = gethostbyname (hostname);
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  if (!hostent)
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    {
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      fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
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      errno = ENOENT;
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      return -1;
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    }
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  for (i = 1; i <= 15; i++)
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    {
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      scb->fd = socket (PF_INET, SOCK_STREAM, 0);
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      if (scb->fd < 0)
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        return -1;
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      /* Allow rapid reuse of this port. */
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      tmp = 1;
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      setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp));
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      /* Enable TCP keep alive process. */
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      tmp = 1;
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      setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
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      sockaddr.sin_family = PF_INET;
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      sockaddr.sin_port = htons (port);
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      memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr,
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              sizeof (struct in_addr));
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      if (!connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr)))
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        break;
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      close (scb->fd);
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      scb->fd = -1;
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/* We retry for ECONNREFUSED because that is often a temporary condition, which
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   happens when the server is being restarted.  */
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      if (errno != ECONNREFUSED)
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        return -1;
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      sleep (1);
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    }
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  protoent = getprotobyname ("tcp");
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  if (!protoent)
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    return -1;
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  tmp = 1;
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  if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY,
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                  (char *) &tmp, sizeof (tmp)))
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    return -1;
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  signal (SIGPIPE, SIG_IGN);    /* If we don't do this, then GDB simply exits
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                                   when the remote side dies.  */
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  return 0;
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}
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static void
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tcp_close (serial_t scb)
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{
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  if (scb->fd < 0)
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    return;
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  close (scb->fd);
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  scb->fd = -1;
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}
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void
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_initialize_ser_tcp (void)
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{
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  struct serial_ops *ops = XMALLOC (struct serial_ops);
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  memset (ops, sizeof (struct serial_ops), 0);
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  ops->name = "tcp";
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  ops->next = 0;
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  ops->open = tcp_open;
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  ops->close = tcp_close;
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  ops->readchar = ser_unix_readchar;
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  ops->write = ser_unix_write;
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  ops->flush_output = ser_unix_nop_flush_output;
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  ops->flush_input = ser_unix_flush_input;
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  ops->send_break = ser_unix_nop_send_break;
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  ops->go_raw = ser_unix_nop_raw;
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  ops->get_tty_state = ser_unix_nop_get_tty_state;
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  ops->set_tty_state = ser_unix_nop_set_tty_state;
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  ops->print_tty_state = ser_unix_nop_print_tty_state;
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  ops->noflush_set_tty_state = ser_unix_nop_noflush_set_tty_state;
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  ops->setbaudrate = ser_unix_nop_setbaudrate;
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  ops->setstopbits = ser_unix_nop_setstopbits;
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  ops->drain_output = ser_unix_nop_drain_output;
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  ops->async = ser_unix_async;
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  serial_add_interface (ops);
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}

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