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2fdbdd3980
second and third arguments. * ser-tcp.c (_initialize_ser_tcp): Likewise. * ser-unix.c (_initialize_ser_hardwire): Likewise.
232 lines
5.6 KiB
C
232 lines
5.6 KiB
C
/* 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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#ifdef HAVE_SYS_FILIO_H
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#include <sys/filio.h> /* For FIONBIO. */
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h> /* For FIONBIO. */
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#endif
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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 net_open (struct serial *scb, const char *name);
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static void net_close (struct serial *scb);
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extern int (*ui_loop_hook) (int);
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void _initialize_ser_tcp (void);
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/* seconds to wait for connect */
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#define TIMEOUT 15
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/* how many times per second to poll ui_loop_hook */
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#define POLL_INTERVAL 2
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/* Open a tcp socket */
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static int
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net_open (struct serial *scb, const char *name)
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{
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char *port_str, hostname[100];
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int n, port, tmp;
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int use_udp;
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struct hostent *hostent;
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struct sockaddr_in sockaddr;
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use_udp = 0;
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if (strncmp (name, "udp:", 4) == 0)
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{
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use_udp = 1;
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name = name + 4;
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}
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else if (strncmp (name, "tcp:", 4) == 0)
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name = name + 4;
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port_str = strchr (name, ':');
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if (!port_str)
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error ("net_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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/* default hostname is localhost */
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if (!hostname[0])
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strcpy (hostname, "localhost");
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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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if (use_udp)
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scb->fd = socket (PF_INET, SOCK_DGRAM, 0);
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else
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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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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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/* set socket nonblocking */
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tmp = 1;
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ioctl (scb->fd, FIONBIO, &tmp);
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/* Use Non-blocking connect. connect() will return 0 if connected already. */
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n = connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr));
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if (n < 0 && errno != EINPROGRESS)
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{
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net_close (scb);
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return -1;
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}
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if (n)
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{
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/* looks like we need to wait for the connect */
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struct timeval t;
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fd_set rset, wset;
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int polls = 0;
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FD_ZERO (&rset);
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do
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{
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/* While we wait for the connect to complete
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poll the UI so it can update or the user can
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interrupt. */
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if (ui_loop_hook)
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{
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if (ui_loop_hook (0))
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{
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errno = EINTR;
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net_close (scb);
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return -1;
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}
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}
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FD_SET (scb->fd, &rset);
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wset = rset;
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t.tv_sec = 0;
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t.tv_usec = 1000000 / POLL_INTERVAL;
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n = select (scb->fd + 1, &rset, &wset, NULL, &t);
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polls++;
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}
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while (n == 0 && polls <= TIMEOUT * POLL_INTERVAL);
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if (n < 0 || polls > TIMEOUT * POLL_INTERVAL)
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{
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if (polls > TIMEOUT * POLL_INTERVAL)
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errno = ETIMEDOUT;
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net_close (scb);
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return -1;
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}
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}
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/* Got something. Is it an error? */
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{
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int res, err, len;
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len = sizeof(err);
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res = getsockopt (scb->fd, SOL_SOCKET, SO_ERROR, &err, &len);
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if (res < 0 || err)
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{
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if (err)
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errno = err;
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net_close (scb);
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return -1;
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}
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}
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/* turn off nonblocking */
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tmp = 0;
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ioctl (scb->fd, FIONBIO, &tmp);
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if (use_udp == 0)
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{
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/* Disable Nagle algorithm. Needed in some cases. */
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tmp = 1;
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setsockopt (scb->fd, IPPROTO_TCP, TCP_NODELAY,
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(char *)&tmp, sizeof (tmp));
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}
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/* If we don't do this, then GDB simply exits
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when the remote side dies. */
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signal (SIGPIPE, SIG_IGN);
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return 0;
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}
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static void
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net_close (struct serial *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, 0, sizeof (struct serial_ops));
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ops->name = "tcp";
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ops->next = 0;
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ops->open = net_open;
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ops->close = net_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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