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authorMartin Hunt <hunt@redhat.com>2001-12-04 06:12:56 +0000
committerMartin Hunt <hunt@redhat.com>2001-12-04 06:12:56 +0000
commit7c7a201a79f24887e4e96be4dd7f17a9be1bbfb2 (patch)
treeaa7378171528982ec6a075b3fbec57fe5cc21950
parentd11008e15f5f41d5bbe328ffaf57cafcabb6fd7a (diff)
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2001-12-03 Martin M. Hunt <hunt@redhat.com>
* serial.h: Add a note to serial_open. * ser-tcp.c (tcp_open): Rewrite to use a non-blocking connect. Allow UI and CLI to abort connect. Instead of trying 15 times with very long timeouts, just try one connect with a maximum timeout of 15 seconds.
-rw-r--r--gdb/ChangeLog9
-rw-r--r--gdb/ser-tcp.c139
2 files changed, 99 insertions, 49 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c56b3ff..617f6d9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+2001-12-03 Martin M. Hunt <hunt@redhat.com>
+
+ * serial.h: Add a note to serial_open.
+
+ * ser-tcp.c (tcp_open): Rewrite to use a non-blocking connect.
+ Allow UI and CLI to abort connect. Instead of trying 15 times
+ with very long timeouts, just try one connect with a maximum timeout
+ of 15 seconds.
+
2001-12-03 Kevin Buettner <kevinb@redhat.com>
* config/powerpc/tm-macos.h (solib.h): Include.
diff --git a/gdb/ser-tcp.c b/gdb/ser-tcp.c
index 9a868e8..0e96f03 100644
--- a/gdb/ser-tcp.c
+++ b/gdb/ser-tcp.c
@@ -24,6 +24,7 @@
#include "ser-unix.h"
#include <sys/types.h>
+#include <sys/ioctl.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
@@ -36,38 +37,39 @@
static int tcp_open (struct serial *scb, const char *name);
static void tcp_close (struct serial *scb);
-
+extern int (*ui_loop_hook) (int);
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 ui_loop_hook */
+#define POLL_INTERVAL 2
+
+/* Open a tcp socket */
static int
tcp_open (struct serial *scb, const char *name)
{
- char *port_str;
- int port;
+ char *port_str, hostname[100];
+ int n, port, tmp;
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 */
+ 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);
+ /* default hostname is localhost */
if (!hostname[0])
strcpy (hostname, "localhost");
hostent = gethostbyname (hostname);
-
if (!hostent)
{
fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
@@ -75,51 +77,90 @@ tcp_open (struct serial *scb, const char *name)
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;
+ 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));
-/* We retry for ECONNREFUSED because that is often a temporary condition, which
- happens when the server is being restarted. */
+ /* set socket nonblocking */
+ tmp = 1;
+ ioctl (scb->fd, FIONBIO, &tmp);
- if (errno != ECONNREFUSED)
- return -1;
+ /* Use Non-blocking connect. connect() will return 0 if connected already. */
+ n = connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr));
- sleep (1);
+ if (n < 0 && errno != EINPROGRESS)
+ {
+ tcp_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;
+ 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 (ui_loop_hook)
+ {
+ if (ui_loop_hook (0))
+ {
+ errno = EINTR;
+ tcp_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;
+ tcp_close (scb);
+ return -1;
+ }
+ }
- signal (SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits
- when the remote side dies. */
+ /* Got something. Is it an error? */
+ {
+ int res, err, len;
+ len = sizeof(err);
+ res = getsockopt (scb->fd, SOL_SOCKET, SO_ERROR, &err, &len);
+ if (res < 0 || err)
+ {
+ if (err)
+ errno = err;
+ tcp_close (scb);
+ return -1;
+ }
+ }
+
+ /* turn off nonblocking */
+ tmp = 0;
+ ioctl (scb->fd, FIONBIO, &tmp);
+
+ /* If we don't do this, then GDB simply exits
+ when the remote side dies. */
+ signal (SIGPIPE, SIG_IGN);
return 0;
}