-/* Serial interface for raw TCP connections on Un*x like systems
- Copyright 1992, 1993, 1998-1999 Free Software Foundation, Inc.
+/* Serial interface for raw TCP connections on Un*x like systems.
+
+ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2005, 2006,
+ 2007 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "serial.h"
-#include "ser-unix.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>
-#ifndef __CYGWIN32__
#include <netinet/tcp.h>
#endif
-#include "signals.h"
+#include <signal.h>
#include "gdb_string.h"
-static int tcp_open (serial_t scb, const char *name);
-static void tcp_close (serial_t scb);
+#ifndef HAVE_SOCKLEN_T
+typedef int socklen_t;
+#endif
void _initialize_ser_tcp (void);
-/* Open up a raw tcp socket */
+/* 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 */
-static int
-tcp_open (serial_t scb, const char *name)
+int
+net_open (struct serial *scb, const char *name)
{
- char *port_str;
- int port;
+ char *port_str, hostname[100];
+ int n, port, tmp;
+ int use_udp;
struct hostent *hostent;
struct sockaddr_in sockaddr;
- int tmp;
- char hostname[100];
- struct protoent *protoent;
- int i;
+#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 ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */
+ 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);
- hostent = gethostbyname (hostname);
+ /* default hostname is localhost */
+ if (!hostname[0])
+ strcpy (hostname, "localhost");
+ hostent = gethostbyname (hostname);
if (!hostent)
{
fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
return -1;
}
- for (i = 1; i <= 15; i++)
- {
- scb->fd = socket (PF_INET, SOCK_STREAM, 0);
- if (scb->fd < 0)
- return -1;
-
- /* Allow rapid reuse of this port. */
- tmp = 1;
- setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp));
+ if (use_udp)
+ scb->fd = socket (PF_INET, SOCK_DGRAM, 0);
+ else
+ scb->fd = socket (PF_INET, SOCK_STREAM, 0);
- /* Enable TCP keep alive process. */
- tmp = 1;
- setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
-
- sockaddr.sin_family = PF_INET;
- sockaddr.sin_port = htons (port);
- memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr,
- sizeof (struct in_addr));
-
- if (!connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr)))
- break;
-
- close (scb->fd);
- scb->fd = -1;
+ 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;
+ }
-/* We retry for ECONNREFUSED because that is often a temporary condition, which
- happens when the server is being restarted. */
+ 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;
+ }
+ }
- if (errno != ECONNREFUSED)
+ /* 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;
+ }
+ }
- sleep (1);
- }
-
- protoent = getprotobyname ("tcp");
- if (!protoent)
- return -1;
+ /* turn off nonblocking */
+ ioarg = 0;
+ ioctl (scb->fd, FIONBIO, &ioarg);
- tmp = 1;
- if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY,
- (char *) &tmp, sizeof (tmp)))
- return -1;
+ if (use_udp == 0)
+ {
+ /* Disable Nagle algorithm. Needed in some cases. */
+ tmp = 1;
+ setsockopt (scb->fd, IPPROTO_TCP, TCP_NODELAY,
+ (char *)&tmp, sizeof (tmp));
+ }
- signal (SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits
- when the remote side dies. */
+#ifdef SIGPIPE
+ /* If we don't do this, then GDB simply exits
+ when the remote side dies. */
+ signal (SIGPIPE, SIG_IGN);
+#endif
return 0;
}
-static void
-tcp_close (serial_t scb)
+void
+net_close (struct serial *scb)
{
if (scb->fd < 0)
return;
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)
{
- struct serial_ops *ops = XMALLOC (struct serial_ops);
- memset (ops, sizeof (struct serial_ops), 0);
+#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 = tcp_open;
- ops->close = tcp_close;
- ops->readchar = ser_unix_readchar;
- ops->write = ser_unix_write;
- ops->flush_output = ser_unix_nop_flush_output;
- ops->flush_input = ser_unix_flush_input;
- ops->send_break = ser_unix_nop_send_break;
- ops->go_raw = ser_unix_nop_raw;
- ops->get_tty_state = ser_unix_nop_get_tty_state;
- ops->set_tty_state = ser_unix_nop_set_tty_state;
- ops->print_tty_state = ser_unix_nop_print_tty_state;
- ops->noflush_set_tty_state = ser_unix_nop_noflush_set_tty_state;
- ops->setbaudrate = ser_unix_nop_setbaudrate;
- ops->setstopbits = ser_unix_nop_setstopbits;
- ops->drain_output = ser_unix_nop_drain_output;
- ops->async = ser_unix_async;
+ 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 */
}
projects / deliverable / binutils-gdb.git / blobdiff