/* Serial interface for raw TCP connections on Un*x like systems
- Copyright 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1998 Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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.
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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. */
#include "defs.h"
#include "serial.h"
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/socket.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifndef __CYGWIN32__
#include <netinet/tcp.h>
+#endif
+
#include "signals.h"
+#include "gdb_string.h"
+
+extern int (*ui_loop_hook) PARAMS ((int));
struct tcp_ttystate
-{
- int bogus;
-};
+ {
+ int bogus;
+ };
static int tcp_open PARAMS ((serial_t scb, const char *name));
static void tcp_raw PARAMS ((serial_t scb));
static int wait_for PARAMS ((serial_t scb, int timeout));
static int tcp_readchar PARAMS ((serial_t scb, int timeout));
static int tcp_setbaudrate PARAMS ((serial_t scb, int rate));
+static int tcp_setstopbits PARAMS ((serial_t scb, int num));
static int tcp_write PARAMS ((serial_t scb, const char *str, int len));
-static void tcp_restore PARAMS ((serial_t scb));
+/* FIXME: static void tcp_restore PARAMS ((serial_t scb)); */
static void tcp_close PARAMS ((serial_t scb));
static serial_ttystate tcp_get_tty_state PARAMS ((serial_t scb));
static int tcp_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
+static int tcp_return_0 PARAMS ((serial_t));
+static int tcp_noflush_set_tty_state PARAMS ((serial_t, serial_ttystate,
+ serial_ttystate));
+static void tcp_print_tty_state PARAMS ((serial_t, serial_ttystate));
+
+void _initialize_ser_tcp PARAMS ((void));
/* Open up a raw tcp socket */
static int
-tcp_open(scb, name)
+tcp_open (scb, name)
serial_t scb;
const char *name;
{
int tmp;
char hostname[100];
struct protoent *protoent;
+ int i;
port_str = strchr (name, ':');
if (!port_str)
- error ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */
+ error ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */
- tmp = min (port_str - name, sizeof hostname - 1);
- strncpy (hostname, name, tmp); /* Don't want colon */
+ 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);
if (!hostent)
{
- fprintf (stderr, "%s: unknown host\n", hostname);
+ fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
errno = ENOENT;
return -1;
}
- scb->fd = socket (PF_INET, SOCK_STREAM, 0);
- if (scb->fd < 0)
- 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));
+ /* Allow rapid reuse of this port. */
+ tmp = 1;
+ setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp));
- /* Enable TCP keep alive process. */
- tmp = 1;
- setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
+ /* 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));
+ 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, &sockaddr, sizeof(sockaddr)))
- {
- close(scb->fd);
+ if (!connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr)))
+ break;
+
+ close (scb->fd);
scb->fd = -1;
- return -1;
+
+/* We retry for ECONNREFUSED because that is often a temporary condition, which
+ happens when the server is being restarted. */
+
+ if (errno != ECONNREFUSED)
+ return -1;
+
+ sleep (1);
}
protoent = getprotobyname ("tcp");
tmp = 1;
if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY,
- (char *)&tmp, sizeof(tmp)))
+ (char *) &tmp, sizeof (tmp)))
return -1;
- signal(SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits
+ signal (SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits
when the remote side dies. */
return 0;
}
static serial_ttystate
-tcp_get_tty_state(scb)
+tcp_get_tty_state (scb)
serial_t scb;
{
struct tcp_ttystate *state;
- state = (struct tcp_ttystate *)xmalloc(sizeof *state);
+ state = (struct tcp_ttystate *) xmalloc (sizeof *state);
- return (serial_ttystate)state;
+ return (serial_ttystate) state;
}
static int
-tcp_set_tty_state(scb, ttystate)
+tcp_set_tty_state (scb, ttystate)
serial_t scb;
serial_ttystate ttystate;
{
struct tcp_ttystate *state;
- state = (struct tcp_ttystate *)ttystate;
+ state = (struct tcp_ttystate *) ttystate;
return 0;
}
static int
-tcp_flush_output (scb)
+tcp_return_0 (scb)
serial_t scb;
{
- /* This is only used by utils.c on stdout, so it doesn't need to work
- for tcp. */
return 0;
}
static void
-tcp_raw(scb)
+tcp_raw (scb)
serial_t scb;
{
return; /* Always in raw mode */
*/
static int
-wait_for(scb, timeout)
+wait_for (scb, timeout)
serial_t scb;
int timeout;
{
tv.tv_sec = timeout;
tv.tv_usec = 0;
- FD_SET(scb->fd, &readfds);
- FD_SET(scb->fd, &exceptfds);
+ FD_SET (scb->fd, &readfds);
+ FD_SET (scb->fd, &exceptfds);
while (1)
{
if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, &exceptfds, &tv);
+ numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, &tv);
else
- numfds = select(scb->fd+1, &readfds, 0, &exceptfds, 0);
+ numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, 0);
if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else if (errno == EINTR)
- continue;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
+ {
+ if (numfds == 0)
+ return SERIAL_TIMEOUT;
+ else if (errno == EINTR)
+ continue;
+ else
+ return SERIAL_ERROR; /* Got an error from select or poll */
+ }
return 0;
}
dead, or -3 for any other error (see errno in that case). */
static int
-tcp_readchar(scb, timeout)
+tcp_readchar (scb, timeout)
serial_t scb;
int timeout;
{
int status;
+ int delta;
if (scb->bufcnt-- > 0)
return *scb->bufp++;
- status = wait_for(scb, timeout);
+ /* We have to be able to keep the GUI alive here, so we break the original
+ timeout into steps of 1 second, running the "keep the GUI alive" hook
+ each time through the loop.
+
+ Also, timeout = 0 means to poll, so we just set the delta to 0, so we
+ will only go through the loop once. */
+
+ delta = (timeout == 0 ? 0 : 1);
+ while (1)
+ {
+
+ /* N.B. The UI may destroy our world (for instance by calling
+ remote_stop,) in which case we want to get out of here as
+ quickly as possible. It is not safe to touch scb, since
+ someone else might have freed it. The ui_loop_hook signals that
+ we should exit by returning 1. */
+
+ if (ui_loop_hook)
+ {
+ if (ui_loop_hook (0))
+ return SERIAL_TIMEOUT;
+ }
+
+ status = wait_for (scb, delta);
+ timeout -= delta;
+
+ /* If we got a character or an error back from wait_for, then we can
+ break from the loop before the timeout is completed. */
+
+ if (status != SERIAL_TIMEOUT)
+ {
+ break;
+ }
+
+ /* If we have exhausted the original timeout, then generate
+ a SERIAL_TIMEOUT, and pass it out of the loop. */
+
+ else if (timeout == 0)
+ {
+ status == SERIAL_TIMEOUT;
+ break;
+ }
+ }
if (status < 0)
return status;
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
+ while (1)
+ {
+ scb->bufcnt = read (scb->fd, scb->buf, BUFSIZ);
+ if (scb->bufcnt != -1 || errno != EINTR)
+ break;
+ }
if (scb->bufcnt <= 0)
- if (scb->bufcnt == 0)
- return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
+ {
+ if (scb->bufcnt == 0)
+ return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
distinguish between EOF & timeouts
someday] */
- else
- return SERIAL_ERROR; /* Got an error from read */
+ else
+ return SERIAL_ERROR; /* Got an error from read */
+ }
scb->bufcnt--;
scb->bufp = scb->buf;
}
static int
-tcp_setbaudrate(scb, rate)
+tcp_setbaudrate (scb, rate)
serial_t scb;
int rate;
{
}
static int
-tcp_set_process_group (scb, ttystate, group)
+tcp_setstopbits (scb, num)
serial_t scb;
- serial_ttystate ttystate;
- int group;
+ int num;
{
- return 0;
+ return 0; /* Never fails! */
}
static int
-tcp_write(scb, str, len)
+tcp_write (scb, str, len)
serial_t scb;
const char *str;
int len;
while (len > 0)
{
- cc = write(scb->fd, str, len);
+ cc = write (scb->fd, str, len);
if (cc < 0)
return 1;
}
static void
-tcp_close(scb)
+tcp_close (scb)
serial_t scb;
{
if (scb->fd < 0)
return;
- close(scb->fd);
+ close (scb->fd);
scb->fd = -1;
}
tcp_close,
tcp_readchar,
tcp_write,
- tcp_flush_output,
+ tcp_return_0, /* flush output */
+ tcp_return_0, /* flush input */
+ tcp_return_0, /* send break */
tcp_raw,
tcp_get_tty_state,
tcp_set_tty_state,
tcp_print_tty_state,
tcp_noflush_set_tty_state,
tcp_setbaudrate,
- tcp_set_process_group
+ tcp_setstopbits,
+ tcp_return_0, /* wait for output to drain */
};
void
projects / deliverable / binutils-gdb.git / blobdiff