1 files changed, 148 insertions, 0 deletions
diff --git a/usr/src/cmd/cmd-inet/sbin/dhcpagent/inform.c b/usr/src/cmd/cmd-inet/sbin/dhcpagent/inform.c
new file mode 100644
index 0000000000..00a106cef1
--- /dev/null
+++ b/usr/src/cmd/cmd-inet/sbin/dhcpagent/inform.c
@@ -0,0 +1,148 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 1995-2001 by Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * INFORM_SENT state of the client state machine.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/sockio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/udp.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp_var.h>
+#include <dhcpmsg.h>
+
+#include "util.h"
+#include "packet.h"
+#include "interface.h"
+
+/*
+ * dhcp_inform(): sends an INFORM packet and sets up reception for an ACK
+ *
+ *   input: struct ifslist *: the interface to send the inform on, ...
+ *  output: void
+ *    note: the INFORM cannot be sent successfully if the interface
+ *	    does not have an IP address
+ */
+
+void
+dhcp_inform(struct ifslist *ifsp)
+{
+	dhcp_pkt_t		*dpkt;
+	struct in_addr		*our_addr;
+	struct ifreq		ifr;
+
+	ifsp->if_state = INIT;
+
+	/*
+	 * fetch our IP address -- since we may not manage the
+	 * interface, go fetch it with ioctl()
+	 */
+
+	(void) memset(&ifr, 0, sizeof (struct ifreq));
+	(void) strlcpy(ifr.ifr_name, ifsp->if_name, IFNAMSIZ);
+	ifr.ifr_addr.sa_family = AF_INET;
+
+	if (ioctl(ifsp->if_sock_fd, SIOCGIFADDR, &ifr) == -1) {
+		ifsp->if_dflags |= DHCP_IF_FAILED;
+		ipc_action_finish(ifsp, DHCP_IPC_E_INT);
+		async_finish(ifsp);
+		return;
+	}
+
+	/*
+	 * the error handling here and in the check for IFF_UP below
+	 * are handled different from most since it is the user who is
+	 * at fault for the problem, not the machine.
+	 */
+
+	/* LINTED [ifr_addr is a sockaddr which will be aligned] */
+	our_addr = &((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
+	if (our_addr->s_addr == htonl(INADDR_ANY)) {
+		dhcpmsg(MSG_WARNING, "dhcp_inform: INFORM attempted on "
+		    "interface with no IP address");
+		ipc_action_finish(ifsp, DHCP_IPC_E_NOIPIF);
+		async_finish(ifsp);
+		remove_ifs(ifsp);
+		return;
+	}
+
+	if (ioctl(ifsp->if_sock_fd, SIOCGIFFLAGS, &ifr) == -1) {
+		ifsp->if_dflags |= DHCP_IF_FAILED;
+		ipc_action_finish(ifsp, DHCP_IPC_E_INT);
+		async_finish(ifsp);
+		return;
+	}
+
+	if ((ifr.ifr_flags & IFF_UP) == 0) {
+		dhcpmsg(MSG_WARNING, "dhcp_inform: INFORM attempted on downed "
+		    "interface");
+		ipc_action_finish(ifsp, DHCP_IPC_E_DOWNIF);
+		async_finish(ifsp);
+		remove_ifs(ifsp);
+		return;
+	}
+
+	/*
+	 * assemble a DHCPREQUEST packet, without the server id
+	 * option.  fill in ciaddr, since we know this.  if_server
+	 * will be set to the server's IP address, which will be the
+	 * broadcast address if we don't know it.  The max dhcp message size
+	 * option is set to the interface max, minus the size of the udp and
+	 * ip headers.
+	 */
+
+	dpkt = init_pkt(ifsp, INFORM);
+	dpkt->pkt->ciaddr = *our_addr;
+
+	add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE, htons(ifsp->if_max -
+			sizeof (struct udpiphdr)));
+	add_pkt_opt(dpkt, CD_CLASS_ID, class_id, class_id_len);
+	add_pkt_opt(dpkt, CD_REQUEST_LIST, ifsp->if_prl, ifsp->if_prllen);
+	add_pkt_opt(dpkt, CD_END, NULL, 0);
+
+	if (send_pkt(ifsp, dpkt, ifsp->if_server.s_addr, NULL) == 0) {
+		ifsp->if_dflags |= DHCP_IF_FAILED;
+		dhcpmsg(MSG_ERROR, "dhcp_inform: send_pkt failed");
+		ipc_action_finish(ifsp, DHCP_IPC_E_INT);
+		async_finish(ifsp);
+		return;
+	}
+
+	if (register_acknak(ifsp) == 0) {
+		ifsp->if_dflags |= DHCP_IF_FAILED;
+		ipc_action_finish(ifsp, DHCP_IPC_E_MEMORY);
+		async_finish(ifsp);
+		return;
+	}
+
+	ifsp->if_state = INFORM_SENT;
+}