old-cross-binutils/gdb/ser-tcp.c
Daniel Jacobowitz 0ea3f30e21 * NEWS: Mention native Windows support.
* Makefile.in (gdb_select_h, ser_tcp_h): New.
	(ALLDEPFILES): Add ser-mingw.c.
	(event-loop.o, inflow.o, mingw-hdep.o, posix-hdep.o, ser-base.o)
	(ser-tcp.o, ser-unix.o): Update.
	(ser-mingw.o): New rule.
	* configure: Regenerated.
	* configure.ac: Add ser-mingw.o for mingw32.
	* ser-mingw.c: New file.
	* event-loop.c: Include "gdb_select.h".
	(gdb_select): Remove, moved to mingw-hdep.c and posix-hdep.c.
	* ser-base.c: Include "gdb_select.h".
	(ser_base_wait_for): Use gdb_select.
	* serial.c (serial_for_fd): New function.
	(serial_fdopen): Try "terminal" before "hardwire".  Initialize
	the allocated struct serial.
	(serial_wait_handle): New function.
	* serial.h (serial_for_fd, serial_wait_handle): New prototypes.
	(struct serial_ops) [USE_WIN32API]: Add wait_handle.
	* gdb_select.h: New file.
	* ser-tcp.c: Include "ser-tcp.h".  Remove unused "ser-unix.h" include.
	(net_close, net_read_prim, net_write_prim): Make global.
	(net_open): Likewise.  Pass an exception set to select.  Whitespace fix.
	Document why we can not use gdb_select.
	(_initialize_ser_tcp) [USE_WIN32API]: Do not register TCP support here.
	* ser-tcp.h: New file.
	* inflow.c (gdb_has_a_terminal): Don't initialize stdin_serial here.
	(handle_sigio): Use gdb_select.
	(initialize_stdin_serial): New function.
	* terminal.h (initialize_stdin_serial): New prototype.
	* top.c (gdb_init): Call initialize_stdin_serial.
	* mingw-hdep.c (gdb_select): New function, moved from gdb_select in
	event-loop.c.  Add exception condition support.  Use serial_for_fd
	and serial_wait_handle.  Fix timeout handling.
	* posix-hdep.c: Include "gdb_select.h".
	(gdb_select): New function.
	* remote-st.c (connect_command): Use gdb_select.
	* ser-unix.c: Include "gdb_select.h".
	(hardwire_send_break, wait_for): Use gdb_select.
2006-02-10 22:01:43 +00:00

295 lines
7.1 KiB
C

/* Serial interface for raw TCP connections on Un*x like systems.
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2005, 2006
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "serial.h"
#include "ser-base.h"
#include "ser-tcp.h"
#include <sys/types.h>
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h> /* For FIONBIO. */
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h> /* For FIONBIO. */
#endif
#include <sys/time.h>
#ifdef USE_WIN32API
#include <winsock2.h>
#define ETIMEDOUT WSAETIMEDOUT
#define close(fd) closesocket (fd)
#define ioctl ioctlsocket
#else
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#endif
#include <signal.h>
#include "gdb_string.h"
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
void _initialize_ser_tcp (void);
/* seconds to wait for connect */
#define TIMEOUT 15
/* how many times per second to poll deprecated_ui_loop_hook */
#define POLL_INTERVAL 2
/* Open a tcp socket */
int
net_open (struct serial *scb, const char *name)
{
char *port_str, hostname[100];
int n, port, tmp;
int use_udp;
struct hostent *hostent;
struct sockaddr_in sockaddr;
#ifdef USE_WIN32API
u_long ioarg;
#else
int ioarg;
#endif
use_udp = 0;
if (strncmp (name, "udp:", 4) == 0)
{
use_udp = 1;
name = name + 4;
}
else if (strncmp (name, "tcp:", 4) == 0)
name = name + 4;
port_str = strchr (name, ':');
if (!port_str)
error (_("net_open: No colon in host name!")); /* Shouldn't ever happen */
tmp = min (port_str - name, (int) sizeof hostname - 1);
strncpy (hostname, name, tmp); /* Don't want colon */
hostname[tmp] = '\000'; /* Tie off host name */
port = atoi (port_str + 1);
/* default hostname is localhost */
if (!hostname[0])
strcpy (hostname, "localhost");
hostent = gethostbyname (hostname);
if (!hostent)
{
fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
errno = ENOENT;
return -1;
}
if (use_udp)
scb->fd = socket (PF_INET, SOCK_DGRAM, 0);
else
scb->fd = socket (PF_INET, SOCK_STREAM, 0);
if (scb->fd < 0)
return -1;
sockaddr.sin_family = PF_INET;
sockaddr.sin_port = htons (port);
memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr,
sizeof (struct in_addr));
/* set socket nonblocking */
ioarg = 1;
ioctl (scb->fd, FIONBIO, &ioarg);
/* Use Non-blocking connect. connect() will return 0 if connected already. */
n = connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr));
if (n < 0
#ifdef USE_WIN32API
/* Under Windows, calling "connect" with a non-blocking socket
results in WSAEWOULDBLOCK, not WSAEINPROGRESS. */
&& WSAGetLastError() != WSAEWOULDBLOCK
#else
&& errno != EINPROGRESS
#endif
)
{
#ifdef USE_WIN32API
errno = WSAGetLastError();
#endif
net_close (scb);
return -1;
}
if (n)
{
/* looks like we need to wait for the connect */
struct timeval t;
fd_set rset, wset, eset;
int polls = 0;
FD_ZERO (&rset);
do
{
/* While we wait for the connect to complete,
poll the UI so it can update or the user can
interrupt. */
if (deprecated_ui_loop_hook)
{
if (deprecated_ui_loop_hook (0))
{
errno = EINTR;
net_close (scb);
return -1;
}
}
FD_SET (scb->fd, &rset);
wset = rset;
eset = rset;
t.tv_sec = 0;
t.tv_usec = 1000000 / POLL_INTERVAL;
/* POSIX systems return connection success or failure by signalling
wset. Windows systems return success in wset and failure in
eset.
We must call select here, rather than gdb_select, because
the serial structure has not yet been initialized - the
MinGW select wrapper will not know that this FD refers
to a socket. */
n = select (scb->fd + 1, &rset, &wset, &eset, &t);
polls++;
}
while (n == 0 && polls <= TIMEOUT * POLL_INTERVAL);
if (n < 0 || polls > TIMEOUT * POLL_INTERVAL)
{
if (polls > TIMEOUT * POLL_INTERVAL)
errno = ETIMEDOUT;
net_close (scb);
return -1;
}
}
/* Got something. Is it an error? */
{
int res, err;
socklen_t len;
len = sizeof (err);
/* On Windows, the fourth parameter to getsockopt is a "char *";
on UNIX systems it is generally "void *". The cast to "void *"
is OK everywhere, since in C "void *" can be implicitly
converted to any pointer type. */
res = getsockopt (scb->fd, SOL_SOCKET, SO_ERROR, (void *) &err, &len);
if (res < 0 || err)
{
if (err)
errno = err;
net_close (scb);
return -1;
}
}
/* turn off nonblocking */
ioarg = 0;
ioctl (scb->fd, FIONBIO, &ioarg);
if (use_udp == 0)
{
/* Disable Nagle algorithm. Needed in some cases. */
tmp = 1;
setsockopt (scb->fd, IPPROTO_TCP, TCP_NODELAY,
(char *)&tmp, sizeof (tmp));
}
#ifdef SIGPIPE
/* If we don't do this, then GDB simply exits
when the remote side dies. */
signal (SIGPIPE, SIG_IGN);
#endif
return 0;
}
void
net_close (struct serial *scb)
{
if (scb->fd < 0)
return;
close (scb->fd);
scb->fd = -1;
}
int
net_read_prim (struct serial *scb, size_t count)
{
return recv (scb->fd, scb->buf, count, 0);
}
int
net_write_prim (struct serial *scb, const void *buf, size_t count)
{
return send (scb->fd, buf, count, 0);
}
void
_initialize_ser_tcp (void)
{
#ifdef USE_WIN32API
/* Do nothing; the TCP serial operations will be initialized in
ser-mingw.c. */
return;
#else
struct serial_ops *ops;
ops = XMALLOC (struct serial_ops);
memset (ops, 0, sizeof (struct serial_ops));
ops->name = "tcp";
ops->next = 0;
ops->open = net_open;
ops->close = net_close;
ops->readchar = ser_base_readchar;
ops->write = ser_base_write;
ops->flush_output = ser_base_flush_output;
ops->flush_input = ser_base_flush_input;
ops->send_break = ser_base_send_break;
ops->go_raw = ser_base_raw;
ops->get_tty_state = ser_base_get_tty_state;
ops->set_tty_state = ser_base_set_tty_state;
ops->print_tty_state = ser_base_print_tty_state;
ops->noflush_set_tty_state = ser_base_noflush_set_tty_state;
ops->setbaudrate = ser_base_setbaudrate;
ops->setstopbits = ser_base_setstopbits;
ops->drain_output = ser_base_drain_output;
ops->async = ser_base_async;
ops->read_prim = net_read_prim;
ops->write_prim = net_write_prim;
serial_add_interface (ops);
#endif /* USE_WIN32API */
}