dhcp6leasectl

3 files changed, 330 insertions, 0 deletions

diff --git a/usr.sbin/dhcp6leasectl/Makefile b/usr.sbin/dhcp6leasectl/Makefile
new file mode 100644
index 00000000000..0af424ace83
--- /dev/null
+++ b/usr.sbin/dhcp6leasectl/Makefile
@@ -0,0 +1,17 @@
+#	$OpenBSD: Makefile,v 1.1 2024/06/06 15:16:57 florian Exp $
+
+PROG=	dhcp6leasectl
+SRCS=	dhcp6leasectl.c
+
+MAN=	dhcp6leasectl.8
+
+CFLAGS+= -Wall
+CFLAGS+= -Wstrict-prototypes -Wmissing-prototypes
+CFLAGS+= -Wmissing-declarations
+CFLAGS+= -Wshadow -Wpointer-arith -Wcast-qual
+CFLAGS+= -Wsign-compare
+CFLAGS+= -I${.CURDIR} -I${.CURDIR}/../../sbin/dhcp6leased
+LDADD=	-lutil
+DPADD=	${LIBUTIL}
+
+.include <bsd.prog.mk>
diff --git a/usr.sbin/dhcp6leasectl/dhcp6leasectl.8 b/usr.sbin/dhcp6leasectl/dhcp6leasectl.8
new file mode 100644
index 00000000000..f5ebd9a08a8
--- /dev/null
+++ b/usr.sbin/dhcp6leasectl/dhcp6leasectl.8
@@ -0,0 +1,73 @@
+.\"	$OpenBSD: dhcp6leasectl.8,v 1.1 2024/06/06 15:16:57 florian Exp $
+.\"
+.\" Copyright (c) 2021 Florian Obser <florian@openbsd.org>
+.\" Copyright (c) 2016 Kenneth R Westerback <kwesterback@gmail.com>
+.\" Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: June 6 2024 $
+.Dt DHCP6LEASECTL 8
+.Os
+.Sh NAME
+.Nm dhcp6leasectl
+.Nd control the dhcp6leased client
+.Sh SYNOPSIS
+.Nm
+.Op Fl l
+.Op Fl s Ar socket
+.Op Fl w Ar maxwait
+.Ar interface
+.Sh DESCRIPTION
+The
+.Nm
+program instructs the
+.Xr dhcp6leased 8
+daemon to request a new lease.
+.Pp
+The following options are available:
+.Bl -tag -width Ds
+.It Fl l
+List the configured lease on
+.Ar interface
+instead of requesting a new lease.
+.It Fl s Ar socket
+Use
+.Ar socket
+instead of the default
+.Pa /dev/dhcp6leased.sock
+to communicate with
+.Xr dhcp6leased 8 .
+.It Fl w Ar maxwait
+Specify the maximum number of seconds to wait for
+.Ar interface
+to be configured.
+The default is to wait 10 seconds unless
+.Fl l
+is specified.
+.El
+.Sh FILES
+.Bl -tag -width "/dev/dhcp6leased.sockXX" -compact
+.It Pa /dev/dhcp6leased.sock
+.Ux Ns -domain
+socket used for communication with
+.Xr dhcp6leased 8 .
+.El
+.Sh SEE ALSO
+.Xr dhcp6leased.conf 5 ,
+.Xr dhcp6leased 8
+.Sh HISTORY
+The
+.Nm
+program first appeared in
+.Ox 7.6 .
diff --git a/usr.sbin/dhcp6leasectl/dhcp6leasectl.c b/usr.sbin/dhcp6leasectl/dhcp6leasectl.c
new file mode 100644
index 00000000000..9398612e80d
--- /dev/null
+++ b/usr.sbin/dhcp6leasectl/dhcp6leasectl.c
@@ -0,0 +1,240 @@
+/*	$OpenBSD: dhcp6leasectl.c,v 1.1 2024/06/06 15:16:57 florian Exp $	*/
+
+/*
+ * Copyright (c) 2021, 2024 Florian Obser <florian@openbsd.org>
+ * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
+ * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
+ * Copyright (c) 2003 Henning Brauer <henning@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/un.h>
+
+#include <arpa/inet.h>
+
+#include <net/if.h>
+
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+
+#include <err.h>
+#include <errno.h>
+#include <event.h>
+#include <imsg.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "dhcp6leased.h"
+
+__dead void	 usage(void);
+void		 show_interface_msg(struct ctl_engine_info *);
+
+struct imsgbuf	*ibuf;
+
+__dead void
+usage(void)
+{
+	extern char *__progname;
+
+	fprintf(stderr, "usage: %s [-l] [-s socket] [-w maxwait] interface\n",
+	    __progname);
+	exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct sockaddr_un	 sun;
+	struct imsg		 imsg;
+	struct ctl_engine_info	*cei;
+	int			 ctl_sock;
+	int			 n, lFlag = 0, maxwait_set = 0, didot = 0;
+	int			 ch, if_index = 0, maxwait = 10, bound = 0;
+	char			*sockname;
+	const char		*errstr;
+
+	sockname = _PATH_CTRL_SOCKET;
+	while ((ch = getopt(argc, argv, "ls:w:")) != -1) {
+		switch (ch) {
+		case 'l':
+			lFlag = 1;
+			break;
+		case 's':
+			sockname = optarg;
+			break;
+		case 'w':
+			maxwait_set = 1;
+			maxwait = strtonum(optarg, 1, INT_MAX, &errstr);
+			if (errstr)
+				errx(1, "maxwait value is %s: %s",
+				    errstr, optarg);
+			break;
+
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+		usage();
+
+	if ((if_index = if_nametoindex(argv[0])) == 0)
+		errx(1, "unknown interface");
+
+	if (lFlag && !maxwait_set)
+		maxwait = 0;
+
+	/* Connect to control socket. */
+	if ((ctl_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
+		err(1, "socket");
+
+	memset(&sun, 0, sizeof(sun));
+	sun.sun_family = AF_UNIX;
+	strlcpy(sun.sun_path, sockname, sizeof(sun.sun_path));
+
+	if (connect(ctl_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
+		err(1, "connect: %s", sockname);
+
+	if (pledge("stdio", NULL) == -1)
+		err(1, "pledge");
+
+	if ((ibuf = malloc(sizeof(struct imsgbuf))) == NULL)
+		err(1, NULL);
+	imsg_init(ibuf, ctl_sock);
+
+	if (!lFlag) {
+		imsg_compose(ibuf, IMSG_CTL_SEND_REQUEST, 0, 0, -1,
+		    &if_index, sizeof(if_index));
+		while (ibuf->w.queued)
+			if (msgbuf_write(&ibuf->w) <= 0 && errno != EAGAIN)
+				err(1, "write error");
+
+	}
+
+	for(;;) {
+		imsg_compose(ibuf, IMSG_CTL_SHOW_INTERFACE_INFO, 0, 0, -1,
+		    &if_index, sizeof(if_index));
+
+		while (ibuf->w.queued)
+			if (msgbuf_write(&ibuf->w) <= 0 && errno != EAGAIN)
+				err(1, "write error");
+
+
+		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
+			errx(1, "imsg_read error");
+		if (n == 0)
+			errx(1, "pipe closed");
+
+		if ((n = imsg_get(ibuf, &imsg)) == -1)
+			errx(1, "imsg_get error");
+		if (n == 0)
+			break;
+
+		if (imsg.hdr.type == IMSG_CTL_END) {
+			if (lFlag)
+				errx(1, "non-autoconf interface %s", argv[0]);
+			else if (--maxwait < 0)
+				break;
+			else
+				continue;
+		}
+
+		cei = imsg.data;
+		if (strcmp(cei->state, "Bound") == 0)
+			bound = 1;
+
+		if (bound || --maxwait < 0) {
+			if (didot)
+				putchar('\n');
+			show_interface_msg(cei);
+			break;
+		} else {
+			didot = 1;
+			putchar('.');
+			fflush(stdout);
+		}
+		imsg_free(&imsg);
+		sleep(1);
+	}
+	close(ctl_sock);
+	free(ibuf);
+
+	return (0);
+}
+
+void
+show_interface_msg(struct ctl_engine_info *cei)
+{
+	struct timespec		 now, diff;
+	time_t			 d, h, m, s;
+	int			 i, has_pd = 0;
+	char			 buf[IF_NAMESIZE], *bufp;
+	char			 ntopbuf[INET6_ADDRSTRLEN];
+
+	bufp = if_indextoname(cei->if_index, buf);
+	printf("%s [%s]\n", bufp != NULL ? bufp : "unknown", cei->state);
+
+	for (i = 0; i < MAX_IA; i++) {
+		if (cei->pds[i].prefix_len == 0)
+			continue;
+		has_pd = 1;
+		printf ("\tIA_PD %d: %s/%d\n", i, inet_ntop(AF_INET6,
+		    &cei->pds[i], ntopbuf, INET6_ADDRSTRLEN),
+		    cei->pds[i].prefix_len);
+	}
+
+	if (has_pd) {
+		clock_gettime(CLOCK_MONOTONIC, &now);
+		timespecsub(&now, &cei->request_time, &diff);
+		s = cei->lease_time - diff.tv_sec;
+		if (s < 0)
+			s = 0;
+
+		if ( s > 86400 ) {
+			d = s / 86400;
+
+			/* round up */
+			if (s - d * 86400 > 43200)
+				d++;
+			printf("\tlease %lld day%s\n", d, d  > 1 ? "s" : "");
+		} else if (s > 3600) {
+			h = s / 3600;
+
+			/* round up */
+			if (s - h * 3600 > 1800)
+				h++;
+			printf("\tlease %lld hour%s\n", h, h > 1 ? "s" : "");
+		} else if (s > 60) {
+			m = s / 60;
+
+			/* round up */
+			if (s - m * 60 > 30)
+				m++;
+			printf("\tlease %lld minute%s\n", m, m > 1 ? "s" : "");
+		} else
+			printf("\tlease %lld second%s\n", s, s > 1 ? "s" : "");
+
+	}
+}