-/* Serial interface for raw TCP connections on Un*x like systems
- Copyright 1992, 1993 Free Software Foundation, Inc.
+/* Serial interface for raw TCP connections on Un*x like systems.
-This file is part of GDB.
+ Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2005
+ Free Software Foundation, Inc.
-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 file is part of GDB.
-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 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.
-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. */
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "serial.h"
+#include "ser-base.h"
+#include "ser-unix.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>
-#include "signals.h"
+#endif
-struct tcp_ttystate
-{
- 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_write PARAMS ((serial_t scb, const char *str, int len));
-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));
-
-/* Open up a raw tcp socket */
+#include <signal.h>
+#include "gdb_string.h"
+
+#ifndef HAVE_SOCKLEN_T
+typedef int socklen_t;
+#endif
+
+static int net_open (struct serial *scb, const char *name);
+static void net_close (struct serial *scb);
+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 */
static int
-tcp_open(scb, name)
- serial_t scb;
- const char *name;
+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;
+#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 + 1, sizeof hostname);
- strncpy (hostname, name, tmp - 1); /* 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);
- 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);
errno = ENOENT;
return -1;
}
- scb->fd = socket (PF_INET, SOCK_STREAM, 0);
+ 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;
-
- /* 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));
-
+
sockaddr.sin_family = PF_INET;
- sockaddr.sin_port = htons(port);
+ 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)))
+ /* 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
+ )
{
- close(scb->fd);
+#ifdef USE_WIN32API
+ errno = WSAGetLastError();
+#endif
+ net_close (scb);
return -1;
}
- protoent = getprotobyname ("tcp");
- if (!protoent)
- return -1;
-
- tmp = 1;
- if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY,
- (char *)&tmp, sizeof(tmp)))
- return -1;
-
- 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)
- serial_t scb;
-{
- struct tcp_ttystate *state;
-
- state = (struct tcp_ttystate *)xmalloc(sizeof *state);
-
- return (serial_ttystate)state;
-}
+ if (n)
+ {
+ /* looks like we need to wait for the connect */
+ struct timeval t;
+ fd_set rset, wset;
+ 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;
+ t.tv_sec = 0;
+ t.tv_usec = 1000000 / POLL_INTERVAL;
+
+ n = select (scb->fd + 1, &rset, &wset, NULL, &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;
+ }
+ }
-static int
-tcp_set_tty_state(scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
-{
- struct tcp_ttystate *state;
+ /* 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));
+ }
- state = (struct tcp_ttystate *)ttystate;
+#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_raw(scb)
- serial_t scb;
-{
- return; /* Always in raw mode */
-}
-
-/* Wait for input on scb, with timeout seconds. Returns 0 on success,
- otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
-
- For termio{s}, we actually just setup VTIME if necessary, and let the
- timeout occur in the read() in tcp_read().
- */
-
-static int
-wait_for(scb, timeout)
- serial_t scb;
- int timeout;
-{
- int numfds;
- struct timeval tv;
- fd_set readfds;
-
- FD_ZERO (&readfds);
-
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
-
- FD_SET(scb->fd, &readfds);
-
- if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
- else
- numfds = select(scb->fd+1, &readfds, 0, 0, 0);
-
- if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
-
- return 0;
-}
-
-/* Read a character with user-specified timeout. TIMEOUT is number of seconds
- to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if successful. Returns -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
-
-static int
-tcp_readchar(scb, timeout)
- serial_t scb;
- int timeout;
+net_close (struct serial *scb)
{
- int status;
-
- if (scb->bufcnt-- > 0)
- return *scb->bufp++;
-
- status = wait_for(scb, timeout);
-
- if (status < 0)
- return status;
-
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
-
- if (scb->bufcnt <= 0)
- 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 */
+ if (scb->fd < 0)
+ return;
- scb->bufcnt--;
- scb->bufp = scb->buf;
- return *scb->bufp++;
+ close (scb->fd);
+ scb->fd = -1;
}
static int
-tcp_setbaudrate(scb, rate)
- serial_t scb;
- int rate;
+net_read_prim (struct serial *scb, size_t count)
{
- return 0; /* Never fails! */
+ return recv (scb->fd, scb->buf, count, 0);
}
static int
-tcp_write(scb, str, len)
- serial_t scb;
- const char *str;
- int len;
-{
- int cc;
-
- while (len > 0)
- {
- cc = write(scb->fd, str, len);
-
- if (cc < 0)
- return 1;
- len -= cc;
- str += cc;
- }
- return 0;
-}
-
-static void
-tcp_close(scb)
- serial_t scb;
+net_write_prim (struct serial *scb, const void *buf, size_t count)
{
- if (scb->fd < 0)
- return;
-
- close(scb->fd);
- scb->fd = -1;
+ return send (scb->fd, buf, count, 0);
}
-static struct serial_ops tcp_ops =
-{
- "tcp",
- 0,
- tcp_open,
- tcp_close,
- tcp_readchar,
- tcp_write,
- tcp_raw,
- tcp_get_tty_state,
- tcp_set_tty_state,
- tcp_setbaudrate,
-};
-
void
-_initialize_ser_tcp ()
+_initialize_ser_tcp (void)
{
- serial_add_interface (&tcp_ops);
+ struct serial_ops *ops;
+#ifdef USE_WIN32API
+ WSADATA wsa_data;
+ if (WSAStartup (MAKEWORD (1, 0), &wsa_data) != 0)
+ /* WinSock is unavailable. */
+ return;
+#endif
+ 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);
}
projects / deliverable / binutils-gdb.git / blobdiff