4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 *
25 * INIT_REBOOT state of the DHCP client state machine.
26 */
27
28 #include <sys/types.h>
29 #include <stdio.h>
30 #include <limits.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 #include <netinet/dhcp.h>
34 #include <netinet/udp.h>
35 #include <netinet/ip_var.h>
36 #include <netinet/udp_var.h>
37 #include <dhcpmsg.h>
38 #include <string.h>
39
40 #include "agent.h"
41 #include "packet.h"
42 #include "states.h"
43 #include "util.h"
44 #include "interface.h"
45 #include "defaults.h"
46
47 static stop_func_t stop_init_reboot;
48
49 /*
50 * dhcp_init_reboot_v4(): attempts to reuse a cached configuration for a state
51 * machine.
52 *
53 * input: dhcp_smach_t *: the state machine to examine for reuse
54 * output: void
55 */
56
57 static void
58 dhcp_init_reboot_v4(dhcp_smach_t *dsmp)
59 {
60 dhcp_pkt_t *dpkt;
61 const char *reqhost;
62 char hostfile[PATH_MAX + 1];
63
64 /*
65 * assemble DHCPREQUEST message. The max dhcp message size
66 * option is set to the interface max, minus the size of the udp and
67 * ip headers.
68 */
69
70 dpkt = init_pkt(dsmp, REQUEST);
71 (void) add_pkt_opt32(dpkt, CD_REQUESTED_IP_ADDR,
72 dsmp->dsm_ack->pkt->yiaddr.s_addr);
73
74 (void) add_pkt_opt32(dpkt, CD_LEASE_TIME, htonl(DHCP_PERM));
75 (void) add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE,
76 htons(dsmp->dsm_lif->lif_pif->pif_max - sizeof (struct udpiphdr)));
77
78 if (class_id_len != 0)
79 (void) add_pkt_opt(dpkt, CD_CLASS_ID, class_id, class_id_len);
80 (void) add_pkt_prl(dpkt, dsmp);
81
82 /*
83 * Set CD_HOSTNAME option if REQUEST_HOSTNAME is set and a hostname
84 * is found in /etc/hostname.<ifname>
85 */
86 if (df_get_bool(dsmp->dsm_name, dsmp->dsm_isv6, DF_REQUEST_HOSTNAME)) {
87 (void) snprintf(hostfile, sizeof (hostfile), "/etc/hostname.%s",
88 dsmp->dsm_name);
89
90 if ((reqhost = iffile_to_hostname(hostfile)) != NULL) {
91 dhcpmsg(MSG_DEBUG, "dhcp_selecting: host %s", reqhost);
92 if ((dsmp->dsm_reqhost = strdup(reqhost)) != NULL)
93 (void) add_pkt_opt(dpkt, CD_HOSTNAME,
94 dsmp->dsm_reqhost,
95 strlen(dsmp->dsm_reqhost));
96 else
97 dhcpmsg(MSG_WARNING, "dhcp_selecting: cannot"
98 " allocate memory for host name option");
99 } else {
100 dhcpmsg(MSG_DEBUG,
101 "dhcp_selecting: no hostname for %s",
102 dsmp->dsm_name);
103 }
104 }
105
106 (void) add_pkt_opt(dpkt, CD_END, NULL, 0);
107
108 (void) send_pkt(dsmp, dpkt, htonl(INADDR_BROADCAST), stop_init_reboot);
109 }
110
111
112 /*
113 * dhcp_init_reboot_v6(): attempts to reuse a cached configuration for a state
114 * machine. Create a Confirm message and multicast it
115 * out.
116 *
117 * input: dhcp_smach_t *: the state machine to examine for reuse
118 * output: void
119 */
120
121 static void
122 dhcp_init_reboot_v6(dhcp_smach_t *dsmp)
123 {
124 dhcp_pkt_t *dpkt;
125 dhcpv6_option_t *d6o, *d6so, *popt;
165 obase = (char *)d6o + sizeof (dhcpv6_ia_na_t);
166 olen -= sizeof (dhcpv6_ia_na_t);
167 d6so = NULL;
168 while ((d6so = dhcpv6_find_option(obase, olen, d6so,
169 DHCPV6_OPT_IAADDR, &solen)) != NULL) {
170 if (solen < sizeof (dhcpv6_iaaddr_t))
171 continue;
172 (void) memcpy(&d6ia, d6so, sizeof (d6ia));
173 d6ia.d6ia_preflife = 0;
174 d6ia.d6ia_vallife = 0;
175 if (add_pkt_subopt(dpkt, popt, DHCPV6_OPT_IAADDR,
176 (char *)&d6ia + sizeof (*d6so),
177 sizeof (d6ia) - sizeof (*d6so)) == NULL)
178 goto failure;
179 }
180 }
181
182 /* Add required Option Request option */
183 (void) add_pkt_prl(dpkt, dsmp);
184
185 (void) send_pkt_v6(dsmp, dpkt, ipv6_all_dhcp_relay_and_servers,
186 stop_init_reboot, DHCPV6_CNF_TIMEOUT, DHCPV6_CNF_MAX_RT);
187
188 return;
189
190 failure:
191 if (!set_start_timer(dsmp))
192 dhcp_selecting(dsmp);
193 }
194
195 /*
196 * dhcp_init_reboot(): attempts to reuse a cached configuration for a state
197 * machine.
198 *
199 * input: dhcp_smach_t *: the state machine to examine for reuse
200 * output: void
201 */
202
203 void
204 dhcp_init_reboot(dhcp_smach_t *dsmp)
|
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
25 *
26 * INIT_REBOOT state of the DHCP client state machine.
27 */
28
29 #include <sys/types.h>
30 #include <stdio.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33 #include <netinet/dhcp.h>
34 #include <netinet/udp.h>
35 #include <netinet/ip_var.h>
36 #include <netinet/udp_var.h>
37 #include <dhcpmsg.h>
38 #include <string.h>
39
40 #include "agent.h"
41 #include "packet.h"
42 #include "states.h"
43 #include "util.h"
44 #include "interface.h"
45 #include "defaults.h"
46
47 static stop_func_t stop_init_reboot;
48
49 /*
50 * dhcp_init_reboot_v4(): attempts to reuse a cached configuration for a state
51 * machine.
52 *
53 * input: dhcp_smach_t *: the state machine to examine for reuse
54 * output: void
55 */
56
57 static void
58 dhcp_init_reboot_v4(dhcp_smach_t *dsmp)
59 {
60 dhcp_pkt_t *dpkt;
61
62 /*
63 * assemble DHCPREQUEST message. The max dhcp message size
64 * option is set to the interface max, minus the size of the udp and
65 * ip headers.
66 */
67
68 dpkt = init_pkt(dsmp, REQUEST);
69 (void) add_pkt_opt32(dpkt, CD_REQUESTED_IP_ADDR,
70 dsmp->dsm_ack->pkt->yiaddr.s_addr);
71
72 (void) add_pkt_opt32(dpkt, CD_LEASE_TIME, htonl(DHCP_PERM));
73 (void) add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE,
74 htons(dsmp->dsm_lif->lif_pif->pif_max - sizeof (struct udpiphdr)));
75
76 if (class_id_len != 0)
77 (void) add_pkt_opt(dpkt, CD_CLASS_ID, class_id, class_id_len);
78 (void) add_pkt_prl(dpkt, dsmp);
79
80 if (dhcp_add_fqdn_opt(dpkt, dsmp) != 0)
81 (void) dhcp_add_hostname_opt(dpkt, dsmp);
82
83 (void) add_pkt_opt(dpkt, CD_END, NULL, 0);
84
85 (void) send_pkt(dsmp, dpkt, htonl(INADDR_BROADCAST), stop_init_reboot);
86 }
87
88
89 /*
90 * dhcp_init_reboot_v6(): attempts to reuse a cached configuration for a state
91 * machine. Create a Confirm message and multicast it
92 * out.
93 *
94 * input: dhcp_smach_t *: the state machine to examine for reuse
95 * output: void
96 */
97
98 static void
99 dhcp_init_reboot_v6(dhcp_smach_t *dsmp)
100 {
101 dhcp_pkt_t *dpkt;
102 dhcpv6_option_t *d6o, *d6so, *popt;
142 obase = (char *)d6o + sizeof (dhcpv6_ia_na_t);
143 olen -= sizeof (dhcpv6_ia_na_t);
144 d6so = NULL;
145 while ((d6so = dhcpv6_find_option(obase, olen, d6so,
146 DHCPV6_OPT_IAADDR, &solen)) != NULL) {
147 if (solen < sizeof (dhcpv6_iaaddr_t))
148 continue;
149 (void) memcpy(&d6ia, d6so, sizeof (d6ia));
150 d6ia.d6ia_preflife = 0;
151 d6ia.d6ia_vallife = 0;
152 if (add_pkt_subopt(dpkt, popt, DHCPV6_OPT_IAADDR,
153 (char *)&d6ia + sizeof (*d6so),
154 sizeof (d6ia) - sizeof (*d6so)) == NULL)
155 goto failure;
156 }
157 }
158
159 /* Add required Option Request option */
160 (void) add_pkt_prl(dpkt, dsmp);
161
162 /* Add FQDN if configured */
163 (void) dhcp_add_fqdn_opt(dpkt, dsmp);
164
165 (void) send_pkt_v6(dsmp, dpkt, ipv6_all_dhcp_relay_and_servers,
166 stop_init_reboot, DHCPV6_CNF_TIMEOUT, DHCPV6_CNF_MAX_RT);
167
168 return;
169
170 failure:
171 if (!set_start_timer(dsmp))
172 dhcp_selecting(dsmp);
173 }
174
175 /*
176 * dhcp_init_reboot(): attempts to reuse a cached configuration for a state
177 * machine.
178 *
179 * input: dhcp_smach_t *: the state machine to examine for reuse
180 * output: void
181 */
182
183 void
184 dhcp_init_reboot(dhcp_smach_t *dsmp)
|