initial import of NetBSD tree

1 files changed, 118 insertions, 0 deletions

diff --git a/usr.bin/talk/ctl_transact.c b/usr.bin/talk/ctl_transact.c
new file mode 100644
index 00000000000..bf9ce85a744
--- /dev/null
+++ b/usr.bin/talk/ctl_transact.c
@@ -0,0 +1,118 @@
+/*	$NetBSD: ctl_transact.c,v 1.3 1994/12/09 02:14:12 jtc Exp $	*/
+
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)ctl_transact.c	8.1 (Berkeley) 6/6/93";
+#endif
+static char rcsid[] = "$NetBSD: ctl_transact.c,v 1.3 1994/12/09 02:14:12 jtc Exp $";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <netinet/in.h>
+#include <protocols/talkd.h>
+#include <errno.h>
+#include "talk_ctl.h"
+
+#define CTL_WAIT 2	/* time to wait for a response, in seconds */
+
+/*
+ * SOCKDGRAM is unreliable, so we must repeat messages if we have
+ * not recieved an acknowledgement within a reasonable amount
+ * of time
+ */
+ctl_transact(target, msg, type, rp)
+	struct in_addr target;
+	CTL_MSG msg;
+	int type;
+	CTL_RESPONSE *rp;
+{
+	int read_mask, ctl_mask, nready, cc;
+	struct timeval wait;
+
+	msg.type = type;
+	daemon_addr.sin_addr = target;
+	daemon_addr.sin_port = daemon_port;
+	ctl_mask = 1 << ctl_sockt;
+
+	/*
+	 * Keep sending the message until a response of
+	 * the proper type is obtained.
+	 */
+	do {
+		wait.tv_sec = CTL_WAIT;
+		wait.tv_usec = 0;
+		/* resend message until a response is obtained */
+		do {
+			cc = sendto(ctl_sockt, (char *)&msg, sizeof (msg), 0,
+			    (struct sockaddr *)&daemon_addr,
+			    sizeof (daemon_addr));
+			if (cc != sizeof (msg)) {
+				if (errno == EINTR)
+					continue;
+				p_error("Error on write to talk daemon");
+			}
+			read_mask = ctl_mask;
+			nready = select(32, &read_mask, 0, 0, &wait);
+			if (nready < 0) {
+				if (errno == EINTR)
+					continue;
+				p_error("Error waiting for daemon response");
+			}
+		} while (nready == 0);
+		/*
+		 * Keep reading while there are queued messages 
+		 * (this is not necessary, it just saves extra
+		 * request/acknowledgements being sent)
+		 */
+		do {
+			cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
+			if (cc < 0) {
+				if (errno == EINTR)
+					continue;
+				p_error("Error on read from talk daemon");
+			}
+			read_mask = ctl_mask;
+			/* an immediate poll */
+			timerclear(&wait);
+			nready = select(32, &read_mask, 0, 0, &wait);
+		} while (nready > 0 && (rp->vers != TALK_VERSION ||
+		    rp->type != type));
+	} while (rp->vers != TALK_VERSION || rp->type != type);
+	rp->id_num = ntohl(rp->id_num);
+	rp->addr.sa_family = ntohs(rp->addr.sa_family);
+}