1/*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
| 1/*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
|
29 * $FreeBSD: stable/10/usr.sbin/ctld/discovery.c 255570 2013-09-14 15:29:06Z trasz $
| 29 * $FreeBSD: stable/10/usr.sbin/ctld/discovery.c 263723 2014-03-25 12:10:30Z trasz $
|
30 */
31
32#include <assert.h>
33#include <stdint.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <netinet/in.h>
38
39#include "ctld.h"
40#include "iscsi_proto.h"
41
42static struct pdu *
43text_receive(struct connection *conn)
44{
45 struct pdu *request;
46 struct iscsi_bhs_text_request *bhstr;
47
48 request = pdu_new(conn);
49 pdu_receive(request);
50 if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
51 ISCSI_BHS_OPCODE_TEXT_REQUEST)
52 log_errx(1, "protocol error: received invalid opcode 0x%x",
53 request->pdu_bhs->bhs_opcode);
54 bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
55#if 0
56 if ((bhstr->bhstr_flags & ISCSI_BHSTR_FLAGS_FINAL) == 0)
57 log_errx(1, "received Text PDU without the \"F\" flag");
58#endif
59 /*
60 * XXX: Implement the C flag some day.
61 */
62 if ((bhstr->bhstr_flags & BHSTR_FLAGS_CONTINUE) != 0)
63 log_errx(1, "received Text PDU with unsupported \"C\" flag");
64 if (request->pdu_data_len == 0)
65 log_errx(1, "received Text PDU with empty data segment");
66
67 if (ntohl(bhstr->bhstr_cmdsn) < conn->conn_cmdsn) {
68 log_errx(1, "received Text PDU with decreasing CmdSN: "
69 "was %d, is %d", conn->conn_cmdsn, ntohl(bhstr->bhstr_cmdsn));
70 }
71 if (ntohl(bhstr->bhstr_expstatsn) != conn->conn_statsn) {
72 log_errx(1, "received Text PDU with wrong StatSN: "
73 "is %d, should be %d", ntohl(bhstr->bhstr_expstatsn),
74 conn->conn_statsn);
75 }
76 conn->conn_cmdsn = ntohl(bhstr->bhstr_cmdsn);
77
78 return (request);
79}
80
81static struct pdu *
82text_new_response(struct pdu *request)
83{
84 struct pdu *response;
85 struct connection *conn;
86 struct iscsi_bhs_text_request *bhstr;
87 struct iscsi_bhs_text_response *bhstr2;
88
89 bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
90 conn = request->pdu_connection;
91
92 response = pdu_new_response(request);
93 bhstr2 = (struct iscsi_bhs_text_response *)response->pdu_bhs;
94 bhstr2->bhstr_opcode = ISCSI_BHS_OPCODE_TEXT_RESPONSE;
95 bhstr2->bhstr_flags = BHSTR_FLAGS_FINAL;
96 bhstr2->bhstr_lun = bhstr->bhstr_lun;
97 bhstr2->bhstr_initiator_task_tag = bhstr->bhstr_initiator_task_tag;
98 bhstr2->bhstr_target_transfer_tag = bhstr->bhstr_target_transfer_tag;
99 bhstr2->bhstr_statsn = htonl(conn->conn_statsn++);
100 bhstr2->bhstr_expcmdsn = htonl(conn->conn_cmdsn);
101 bhstr2->bhstr_maxcmdsn = htonl(conn->conn_cmdsn);
102
103 return (response);
104}
105
106static struct pdu *
107logout_receive(struct connection *conn)
108{
109 struct pdu *request;
110 struct iscsi_bhs_logout_request *bhslr;
111
112 request = pdu_new(conn);
113 pdu_receive(request);
114 if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
115 ISCSI_BHS_OPCODE_LOGOUT_REQUEST)
116 log_errx(1, "protocol error: received invalid opcode 0x%x",
117 request->pdu_bhs->bhs_opcode);
118 bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
119 if ((bhslr->bhslr_reason & 0x7f) != BHSLR_REASON_CLOSE_SESSION)
120 log_debugx("received Logout PDU with invalid reason 0x%x; "
121 "continuing anyway", bhslr->bhslr_reason & 0x7f);
122 if (ntohl(bhslr->bhslr_cmdsn) < conn->conn_cmdsn) {
123 log_errx(1, "received Logout PDU with decreasing CmdSN: "
124 "was %d, is %d", conn->conn_cmdsn,
125 ntohl(bhslr->bhslr_cmdsn));
126 }
127 if (ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
128 log_errx(1, "received Logout PDU with wrong StatSN: "
129 "is %d, should be %d", ntohl(bhslr->bhslr_expstatsn),
130 conn->conn_statsn);
131 }
132 conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
133
134 return (request);
135}
136
137static struct pdu *
138logout_new_response(struct pdu *request)
139{
140 struct pdu *response;
141 struct connection *conn;
142 struct iscsi_bhs_logout_request *bhslr;
143 struct iscsi_bhs_logout_response *bhslr2;
144
145 bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
146 conn = request->pdu_connection;
147
148 response = pdu_new_response(request);
149 bhslr2 = (struct iscsi_bhs_logout_response *)response->pdu_bhs;
150 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
151 bhslr2->bhslr_flags = 0x80;
152 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
153 bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag;
154 bhslr2->bhslr_statsn = htonl(conn->conn_statsn++);
155 bhslr2->bhslr_expcmdsn = htonl(conn->conn_cmdsn);
156 bhslr2->bhslr_maxcmdsn = htonl(conn->conn_cmdsn);
157
158 return (response);
159}
160
161void
162discovery(struct connection *conn)
163{
164 struct pdu *request, *response;
165 struct keys *request_keys, *response_keys;
166 struct target *targ;
167 const char *send_targets;
168
169 log_debugx("beginning discovery session; waiting for Text PDU");
170 request = text_receive(conn);
171 request_keys = keys_new();
172 keys_load(request_keys, request);
173
174 send_targets = keys_find(request_keys, "SendTargets");
175 if (send_targets == NULL)
176 log_errx(1, "received Text PDU without SendTargets");
177
178 response = text_new_response(request);
179 response_keys = keys_new();
180
181 if (strcmp(send_targets, "All") == 0) {
182 TAILQ_FOREACH(targ,
183 &conn->conn_portal->p_portal_group->pg_conf->conf_targets,
184 t_next) {
185 if (targ->t_portal_group !=
186 conn->conn_portal->p_portal_group) {
187 log_debugx("not returning target \"%s\"; "
188 "belongs to a different portal group",
| 30 */
31
32#include <assert.h>
33#include <stdint.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <netinet/in.h>
38
39#include "ctld.h"
40#include "iscsi_proto.h"
41
42static struct pdu *
43text_receive(struct connection *conn)
44{
45 struct pdu *request;
46 struct iscsi_bhs_text_request *bhstr;
47
48 request = pdu_new(conn);
49 pdu_receive(request);
50 if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
51 ISCSI_BHS_OPCODE_TEXT_REQUEST)
52 log_errx(1, "protocol error: received invalid opcode 0x%x",
53 request->pdu_bhs->bhs_opcode);
54 bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
55#if 0
56 if ((bhstr->bhstr_flags & ISCSI_BHSTR_FLAGS_FINAL) == 0)
57 log_errx(1, "received Text PDU without the \"F\" flag");
58#endif
59 /*
60 * XXX: Implement the C flag some day.
61 */
62 if ((bhstr->bhstr_flags & BHSTR_FLAGS_CONTINUE) != 0)
63 log_errx(1, "received Text PDU with unsupported \"C\" flag");
64 if (request->pdu_data_len == 0)
65 log_errx(1, "received Text PDU with empty data segment");
66
67 if (ntohl(bhstr->bhstr_cmdsn) < conn->conn_cmdsn) {
68 log_errx(1, "received Text PDU with decreasing CmdSN: "
69 "was %d, is %d", conn->conn_cmdsn, ntohl(bhstr->bhstr_cmdsn));
70 }
71 if (ntohl(bhstr->bhstr_expstatsn) != conn->conn_statsn) {
72 log_errx(1, "received Text PDU with wrong StatSN: "
73 "is %d, should be %d", ntohl(bhstr->bhstr_expstatsn),
74 conn->conn_statsn);
75 }
76 conn->conn_cmdsn = ntohl(bhstr->bhstr_cmdsn);
77
78 return (request);
79}
80
81static struct pdu *
82text_new_response(struct pdu *request)
83{
84 struct pdu *response;
85 struct connection *conn;
86 struct iscsi_bhs_text_request *bhstr;
87 struct iscsi_bhs_text_response *bhstr2;
88
89 bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
90 conn = request->pdu_connection;
91
92 response = pdu_new_response(request);
93 bhstr2 = (struct iscsi_bhs_text_response *)response->pdu_bhs;
94 bhstr2->bhstr_opcode = ISCSI_BHS_OPCODE_TEXT_RESPONSE;
95 bhstr2->bhstr_flags = BHSTR_FLAGS_FINAL;
96 bhstr2->bhstr_lun = bhstr->bhstr_lun;
97 bhstr2->bhstr_initiator_task_tag = bhstr->bhstr_initiator_task_tag;
98 bhstr2->bhstr_target_transfer_tag = bhstr->bhstr_target_transfer_tag;
99 bhstr2->bhstr_statsn = htonl(conn->conn_statsn++);
100 bhstr2->bhstr_expcmdsn = htonl(conn->conn_cmdsn);
101 bhstr2->bhstr_maxcmdsn = htonl(conn->conn_cmdsn);
102
103 return (response);
104}
105
106static struct pdu *
107logout_receive(struct connection *conn)
108{
109 struct pdu *request;
110 struct iscsi_bhs_logout_request *bhslr;
111
112 request = pdu_new(conn);
113 pdu_receive(request);
114 if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
115 ISCSI_BHS_OPCODE_LOGOUT_REQUEST)
116 log_errx(1, "protocol error: received invalid opcode 0x%x",
117 request->pdu_bhs->bhs_opcode);
118 bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
119 if ((bhslr->bhslr_reason & 0x7f) != BHSLR_REASON_CLOSE_SESSION)
120 log_debugx("received Logout PDU with invalid reason 0x%x; "
121 "continuing anyway", bhslr->bhslr_reason & 0x7f);
122 if (ntohl(bhslr->bhslr_cmdsn) < conn->conn_cmdsn) {
123 log_errx(1, "received Logout PDU with decreasing CmdSN: "
124 "was %d, is %d", conn->conn_cmdsn,
125 ntohl(bhslr->bhslr_cmdsn));
126 }
127 if (ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
128 log_errx(1, "received Logout PDU with wrong StatSN: "
129 "is %d, should be %d", ntohl(bhslr->bhslr_expstatsn),
130 conn->conn_statsn);
131 }
132 conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
133
134 return (request);
135}
136
137static struct pdu *
138logout_new_response(struct pdu *request)
139{
140 struct pdu *response;
141 struct connection *conn;
142 struct iscsi_bhs_logout_request *bhslr;
143 struct iscsi_bhs_logout_response *bhslr2;
144
145 bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
146 conn = request->pdu_connection;
147
148 response = pdu_new_response(request);
149 bhslr2 = (struct iscsi_bhs_logout_response *)response->pdu_bhs;
150 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
151 bhslr2->bhslr_flags = 0x80;
152 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
153 bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag;
154 bhslr2->bhslr_statsn = htonl(conn->conn_statsn++);
155 bhslr2->bhslr_expcmdsn = htonl(conn->conn_cmdsn);
156 bhslr2->bhslr_maxcmdsn = htonl(conn->conn_cmdsn);
157
158 return (response);
159}
160
161void
162discovery(struct connection *conn)
163{
164 struct pdu *request, *response;
165 struct keys *request_keys, *response_keys;
166 struct target *targ;
167 const char *send_targets;
168
169 log_debugx("beginning discovery session; waiting for Text PDU");
170 request = text_receive(conn);
171 request_keys = keys_new();
172 keys_load(request_keys, request);
173
174 send_targets = keys_find(request_keys, "SendTargets");
175 if (send_targets == NULL)
176 log_errx(1, "received Text PDU without SendTargets");
177
178 response = text_new_response(request);
179 response_keys = keys_new();
180
181 if (strcmp(send_targets, "All") == 0) {
182 TAILQ_FOREACH(targ,
183 &conn->conn_portal->p_portal_group->pg_conf->conf_targets,
184 t_next) {
185 if (targ->t_portal_group !=
186 conn->conn_portal->p_portal_group) {
187 log_debugx("not returning target \"%s\"; "
188 "belongs to a different portal group",
|
189 targ->t_iqn);
| 189 targ->t_name);
|
190 continue;
191 }
| 190 continue;
191 }
|
192 keys_add(response_keys, "TargetName", targ->t_iqn);
| 192 keys_add(response_keys, "TargetName", targ->t_name);
|
193 }
194 } else {
195 targ = target_find(conn->conn_portal->p_portal_group->pg_conf,
196 send_targets);
197 if (targ == NULL) {
198 log_debugx("initiator requested information on unknown "
199 "target \"%s\"; returning nothing", send_targets);
200 } else {
| 193 }
194 } else {
195 targ = target_find(conn->conn_portal->p_portal_group->pg_conf,
196 send_targets);
197 if (targ == NULL) {
198 log_debugx("initiator requested information on unknown "
199 "target \"%s\"; returning nothing", send_targets);
200 } else {
|
201 keys_add(response_keys, "TargetName", targ->t_iqn);
| 201 keys_add(response_keys, "TargetName", targ->t_name);
|
202 }
203 }
204 keys_save(response_keys, response);
205
206 pdu_send(response);
207 pdu_delete(response);
208 keys_delete(response_keys);
209 pdu_delete(request);
210 keys_delete(request_keys);
211
212 log_debugx("done sending targets; waiting for Logout PDU");
213 request = logout_receive(conn);
214 response = logout_new_response(request);
215
216 pdu_send(response);
217 pdu_delete(response);
218 pdu_delete(request);
219
220 log_debugx("discovery session done");
221}
| 202 }
203 }
204 keys_save(response_keys, response);
205
206 pdu_send(response);
207 pdu_delete(response);
208 keys_delete(response_keys);
209 pdu_delete(request);
210 keys_delete(request_keys);
211
212 log_debugx("done sending targets; waiting for Logout PDU");
213 request = logout_receive(conn);
214 response = logout_new_response(request);
215
216 pdu_send(response);
217 pdu_delete(response);
218 pdu_delete(request);
219
220 log_debugx("discovery session done");
221}
|