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-rw-r--r--gdb/ser-tcp.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/gdb/ser-tcp.c b/gdb/ser-tcp.c
new file mode 100644
index 0000000..c551337
--- /dev/null
+++ b/gdb/ser-tcp.c
@@ -0,0 +1,358 @@
+/* Serial interface for raw TCP connections on Un*x like systems
+ Copyright 1992, 1993, 1998 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "serial.h"
+#include <sys/types.h>
+#include <sys/time.h>
+#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 "gdb_string.h"
+
+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_setstopbits PARAMS ((serial_t scb, int num));
+static int tcp_write PARAMS ((serial_t scb, const char *str, int len));
+/* 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)
+ serial_t scb;
+ const char *name;
+{
+ char *port_str;
+ int port;
+ struct hostent *hostent;
+ struct sockaddr_in sockaddr;
+ 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 */
+
+ 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);
+
+ if (!hostent)
+ {
+ fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
+ errno = ENOENT;
+ 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));
+
+ /* 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;
+
+/* 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");
+ 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;
+}
+
+static int
+tcp_set_tty_state(scb, ttystate)
+ serial_t scb;
+ serial_ttystate ttystate;
+{
+ struct tcp_ttystate *state;
+
+ state = (struct tcp_ttystate *)ttystate;
+
+ return 0;
+}
+
+static int
+tcp_return_0 (scb)
+ serial_t scb;
+{
+ 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, exceptfds;
+
+ FD_ZERO (&readfds);
+ FD_ZERO (&exceptfds);
+
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
+ FD_SET(scb->fd, &readfds);
+ FD_SET(scb->fd, &exceptfds);
+
+ while (1)
+ {
+ if (timeout >= 0)
+ numfds = select(scb->fd+1, &readfds, 0, &exceptfds, &tv);
+ else
+ 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 */
+ }
+
+ 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;
+{
+ int status;
+
+ if (scb->bufcnt-- > 0)
+ return *scb->bufp++;
+
+ status = wait_for(scb, timeout);
+
+ if (status < 0)
+ return status;
+
+ 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
+ distinguish between EOF & timeouts
+ someday] */
+ else
+ return SERIAL_ERROR; /* Got an error from read */
+ }
+
+ scb->bufcnt--;
+ scb->bufp = scb->buf;
+ return *scb->bufp++;
+}
+
+static int
+tcp_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
+ serial_t scb;
+ serial_ttystate new_ttystate;
+ serial_ttystate old_ttystate;
+{
+ return 0;
+}
+
+static void
+tcp_print_tty_state (scb, ttystate)
+ serial_t scb;
+ serial_ttystate ttystate;
+{
+ /* Nothing to print. */
+ return;
+}
+
+static int
+tcp_setbaudrate(scb, rate)
+ serial_t scb;
+ int rate;
+{
+ return 0; /* Never fails! */
+}
+
+static int
+tcp_setstopbits(scb, num)
+ serial_t scb;
+ int num;
+{
+ return 0; /* Never fails! */
+}
+
+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;
+{
+ if (scb->fd < 0)
+ return;
+
+ close(scb->fd);
+ scb->fd = -1;
+}
+
+static struct serial_ops tcp_ops =
+{
+ "tcp",
+ 0,
+ tcp_open,
+ tcp_close,
+ tcp_readchar,
+ tcp_write,
+ 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_setstopbits,
+ tcp_return_0, /* wait for output to drain */
+};
+
+void
+_initialize_ser_tcp ()
+{
+ serial_add_interface (&tcp_ops);
+}
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