2 * Copyright (c) 2012 The FreeBSD Foundation
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
39 #include <netinet/in.h>
42 #include "iscsi_proto.h"
44 static void login_send_error(struct pdu *request,
45 char class, char detail);
48 login_set_nsg(struct pdu *response, int nsg)
50 struct iscsi_bhs_login_response *bhslr;
52 assert(nsg == BHSLR_STAGE_SECURITY_NEGOTIATION ||
53 nsg == BHSLR_STAGE_OPERATIONAL_NEGOTIATION ||
54 nsg == BHSLR_STAGE_FULL_FEATURE_PHASE);
56 bhslr = (struct iscsi_bhs_login_response *)response->pdu_bhs;
58 bhslr->bhslr_flags &= 0xFC;
59 bhslr->bhslr_flags |= nsg;
60 bhslr->bhslr_flags |= BHSLR_FLAGS_TRANSIT;
64 login_csg(const struct pdu *request)
66 struct iscsi_bhs_login_request *bhslr;
68 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
70 return ((bhslr->bhslr_flags & 0x0C) >> 2);
74 login_set_csg(struct pdu *response, int csg)
76 struct iscsi_bhs_login_response *bhslr;
78 assert(csg == BHSLR_STAGE_SECURITY_NEGOTIATION ||
79 csg == BHSLR_STAGE_OPERATIONAL_NEGOTIATION ||
80 csg == BHSLR_STAGE_FULL_FEATURE_PHASE);
82 bhslr = (struct iscsi_bhs_login_response *)response->pdu_bhs;
84 bhslr->bhslr_flags &= 0xF3;
85 bhslr->bhslr_flags |= csg << 2;
89 login_receive(struct connection *conn, bool initial)
92 struct iscsi_bhs_login_request *bhslr;
94 request = pdu_new(conn);
96 if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
97 ISCSI_BHS_OPCODE_LOGIN_REQUEST) {
99 * The first PDU in session is special - if we receive any PDU
100 * different than login request, we have to drop the connection
101 * without sending response ("A target receiving any PDU
102 * except a Login request before the Login Phase is started MUST
103 * immediately terminate the connection on which the PDU
106 if (initial == false)
107 login_send_error(request, 0x02, 0x0b);
108 log_errx(1, "protocol error: received invalid opcode 0x%x",
109 request->pdu_bhs->bhs_opcode);
111 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
113 * XXX: Implement the C flag some day.
115 if ((bhslr->bhslr_flags & BHSLR_FLAGS_CONTINUE) != 0) {
116 login_send_error(request, 0x03, 0x00);
117 log_errx(1, "received Login PDU with unsupported \"C\" flag");
119 if (bhslr->bhslr_version_max != 0x00) {
120 login_send_error(request, 0x02, 0x05);
121 log_errx(1, "received Login PDU with unsupported "
122 "Version-max 0x%x", bhslr->bhslr_version_max);
124 if (bhslr->bhslr_version_min != 0x00) {
125 login_send_error(request, 0x02, 0x05);
126 log_errx(1, "received Login PDU with unsupported "
127 "Version-min 0x%x", bhslr->bhslr_version_min);
129 if (ISCSI_SNLT(ntohl(bhslr->bhslr_cmdsn), conn->conn_cmdsn)) {
130 login_send_error(request, 0x02, 0x05);
131 log_errx(1, "received Login PDU with decreasing CmdSN: "
132 "was %u, is %u", conn->conn_cmdsn,
133 ntohl(bhslr->bhslr_cmdsn));
135 if (initial == false &&
136 ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
137 login_send_error(request, 0x02, 0x05);
138 log_errx(1, "received Login PDU with wrong ExpStatSN: "
139 "is %u, should be %u", ntohl(bhslr->bhslr_expstatsn),
142 conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
148 login_new_response(struct pdu *request)
150 struct pdu *response;
151 struct connection *conn;
152 struct iscsi_bhs_login_request *bhslr;
153 struct iscsi_bhs_login_response *bhslr2;
155 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
156 conn = request->pdu_connection;
158 response = pdu_new_response(request);
159 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
160 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGIN_RESPONSE;
161 login_set_csg(response, BHSLR_STAGE_SECURITY_NEGOTIATION);
162 memcpy(bhslr2->bhslr_isid,
163 bhslr->bhslr_isid, sizeof(bhslr2->bhslr_isid));
164 bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag;
165 bhslr2->bhslr_statsn = htonl(conn->conn_statsn++);
166 bhslr2->bhslr_expcmdsn = htonl(conn->conn_cmdsn);
167 bhslr2->bhslr_maxcmdsn = htonl(conn->conn_cmdsn);
173 login_send_error(struct pdu *request, char class, char detail)
175 struct pdu *response;
176 struct iscsi_bhs_login_response *bhslr2;
178 log_debugx("sending Login Response PDU with failure class 0x%x/0x%x; "
179 "see next line for reason", class, detail);
180 response = login_new_response(request);
181 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
182 bhslr2->bhslr_status_class = class;
183 bhslr2->bhslr_status_detail = detail;
186 pdu_delete(response);
190 login_list_contains(const char *list, const char *what)
192 char *tofree, *str, *token;
194 tofree = str = checked_strdup(list);
196 while ((token = strsep(&str, ",")) != NULL) {
197 if (strcmp(token, what) == 0) {
207 login_list_prefers(const char *list,
208 const char *choice1, const char *choice2)
210 char *tofree, *str, *token;
212 tofree = str = checked_strdup(list);
214 while ((token = strsep(&str, ",")) != NULL) {
215 if (strcmp(token, choice1) == 0) {
219 if (strcmp(token, choice2) == 0) {
229 login_receive_chap_a(struct connection *conn)
232 struct keys *request_keys;
235 request = login_receive(conn, false);
236 request_keys = keys_new();
237 keys_load(request_keys, request);
239 chap_a = keys_find(request_keys, "CHAP_A");
240 if (chap_a == NULL) {
241 login_send_error(request, 0x02, 0x07);
242 log_errx(1, "received CHAP Login PDU without CHAP_A");
244 if (login_list_contains(chap_a, "5") == 0) {
245 login_send_error(request, 0x02, 0x01);
246 log_errx(1, "received CHAP Login PDU with unsupported CHAP_A "
249 keys_delete(request_keys);
255 login_send_chap_c(struct pdu *request, struct chap *chap)
257 struct pdu *response;
258 struct keys *response_keys;
259 char *chap_c, *chap_i;
261 chap_c = chap_get_challenge(chap);
262 chap_i = chap_get_id(chap);
264 response = login_new_response(request);
265 response_keys = keys_new();
266 keys_add(response_keys, "CHAP_A", "5");
267 keys_add(response_keys, "CHAP_I", chap_i);
268 keys_add(response_keys, "CHAP_C", chap_c);
271 keys_save(response_keys, response);
273 pdu_delete(response);
274 keys_delete(response_keys);
278 login_receive_chap_r(struct connection *conn, struct auth_group *ag,
279 struct chap *chap, const struct auth **authp)
282 struct keys *request_keys;
283 const char *chap_n, *chap_r;
284 const struct auth *auth;
287 request = login_receive(conn, false);
288 request_keys = keys_new();
289 keys_load(request_keys, request);
291 chap_n = keys_find(request_keys, "CHAP_N");
292 if (chap_n == NULL) {
293 login_send_error(request, 0x02, 0x07);
294 log_errx(1, "received CHAP Login PDU without CHAP_N");
296 chap_r = keys_find(request_keys, "CHAP_R");
297 if (chap_r == NULL) {
298 login_send_error(request, 0x02, 0x07);
299 log_errx(1, "received CHAP Login PDU without CHAP_R");
301 error = chap_receive(chap, chap_r);
303 login_send_error(request, 0x02, 0x07);
304 log_errx(1, "received CHAP Login PDU with malformed CHAP_R");
308 * Verify the response.
310 assert(ag->ag_type == AG_TYPE_CHAP ||
311 ag->ag_type == AG_TYPE_CHAP_MUTUAL);
312 auth = auth_find(ag, chap_n);
314 login_send_error(request, 0x02, 0x01);
315 log_errx(1, "received CHAP Login with invalid user \"%s\"",
319 assert(auth->a_secret != NULL);
320 assert(strlen(auth->a_secret) > 0);
322 error = chap_authenticate(chap, auth->a_secret);
324 login_send_error(request, 0x02, 0x01);
325 log_errx(1, "CHAP authentication failed for user \"%s\"",
329 keys_delete(request_keys);
336 login_send_chap_success(struct pdu *request,
337 const struct auth *auth)
339 struct pdu *response;
340 struct keys *request_keys, *response_keys;
342 const char *chap_i, *chap_c;
346 response = login_new_response(request);
347 login_set_nsg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
350 * Actually, one more thing: mutual authentication.
352 request_keys = keys_new();
353 keys_load(request_keys, request);
354 chap_i = keys_find(request_keys, "CHAP_I");
355 chap_c = keys_find(request_keys, "CHAP_C");
356 if (chap_i != NULL || chap_c != NULL) {
357 if (chap_i == NULL) {
358 login_send_error(request, 0x02, 0x07);
359 log_errx(1, "initiator requested target "
360 "authentication, but didn't send CHAP_I");
362 if (chap_c == NULL) {
363 login_send_error(request, 0x02, 0x07);
364 log_errx(1, "initiator requested target "
365 "authentication, but didn't send CHAP_C");
367 if (auth->a_auth_group->ag_type != AG_TYPE_CHAP_MUTUAL) {
368 login_send_error(request, 0x02, 0x01);
369 log_errx(1, "initiator requests target authentication "
370 "for user \"%s\", but mutual user/secret "
371 "is not set", auth->a_user);
374 log_debugx("performing mutual authentication as user \"%s\"",
375 auth->a_mutual_user);
377 rchap = rchap_new(auth->a_mutual_secret);
378 error = rchap_receive(rchap, chap_i, chap_c);
380 login_send_error(request, 0x02, 0x07);
381 log_errx(1, "received CHAP Login PDU with malformed "
384 chap_r = rchap_get_response(rchap);
386 response_keys = keys_new();
387 keys_add(response_keys, "CHAP_N", auth->a_mutual_user);
388 keys_add(response_keys, "CHAP_R", chap_r);
390 keys_save(response_keys, response);
391 keys_delete(response_keys);
393 log_debugx("initiator did not request target authentication");
396 keys_delete(request_keys);
398 pdu_delete(response);
402 login_chap(struct connection *conn, struct auth_group *ag)
404 const struct auth *auth;
409 * Receive CHAP_A PDU.
411 log_debugx("beginning CHAP authentication; waiting for CHAP_A");
412 request = login_receive_chap_a(conn);
415 * Generate the challenge.
420 * Send the challenge.
422 log_debugx("sending CHAP_C, binary challenge size is %zd bytes",
423 sizeof(chap->chap_challenge));
424 login_send_chap_c(request, chap);
428 * Receive CHAP_N/CHAP_R PDU and authenticate.
430 log_debugx("waiting for CHAP_N/CHAP_R");
431 request = login_receive_chap_r(conn, ag, chap, &auth);
434 * Yay, authentication succeeded!
436 log_debugx("authentication succeeded for user \"%s\"; "
437 "transitioning to Negotiation Phase", auth->a_user);
438 login_send_chap_success(request, auth);
442 * Leave username and CHAP information for discovery().
444 conn->conn_user = auth->a_user;
445 conn->conn_chap = chap;
449 login_negotiate_key(struct pdu *request, const char *name,
450 const char *value, bool skipped_security, struct keys *response_keys)
453 struct connection *conn;
455 conn = request->pdu_connection;
457 if (strcmp(name, "InitiatorName") == 0) {
458 if (!skipped_security)
459 log_errx(1, "initiator resent InitiatorName");
460 } else if (strcmp(name, "SessionType") == 0) {
461 if (!skipped_security)
462 log_errx(1, "initiator resent SessionType");
463 } else if (strcmp(name, "TargetName") == 0) {
464 if (!skipped_security)
465 log_errx(1, "initiator resent TargetName");
466 } else if (strcmp(name, "InitiatorAlias") == 0) {
467 if (conn->conn_initiator_alias != NULL)
468 free(conn->conn_initiator_alias);
469 conn->conn_initiator_alias = checked_strdup(value);
470 } else if (strcmp(value, "Irrelevant") == 0) {
472 } else if (strcmp(name, "HeaderDigest") == 0) {
474 * We don't handle digests for discovery sessions.
476 if (conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY) {
477 log_debugx("discovery session; digests disabled");
478 keys_add(response_keys, name, "None");
482 which = login_list_prefers(value, "CRC32C", "None");
485 log_debugx("initiator prefers CRC32C "
486 "for header digest; we'll use it");
487 conn->conn_header_digest = CONN_DIGEST_CRC32C;
488 keys_add(response_keys, name, "CRC32C");
491 log_debugx("initiator prefers not to do "
492 "header digest; we'll comply");
493 keys_add(response_keys, name, "None");
496 log_warnx("initiator sent unrecognized "
497 "HeaderDigest value \"%s\"; will use None", value);
498 keys_add(response_keys, name, "None");
501 } else if (strcmp(name, "DataDigest") == 0) {
502 if (conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY) {
503 log_debugx("discovery session; digests disabled");
504 keys_add(response_keys, name, "None");
508 which = login_list_prefers(value, "CRC32C", "None");
511 log_debugx("initiator prefers CRC32C "
512 "for data digest; we'll use it");
513 conn->conn_data_digest = CONN_DIGEST_CRC32C;
514 keys_add(response_keys, name, "CRC32C");
517 log_debugx("initiator prefers not to do "
518 "data digest; we'll comply");
519 keys_add(response_keys, name, "None");
522 log_warnx("initiator sent unrecognized "
523 "DataDigest value \"%s\"; will use None", value);
524 keys_add(response_keys, name, "None");
527 } else if (strcmp(name, "MaxConnections") == 0) {
528 keys_add(response_keys, name, "1");
529 } else if (strcmp(name, "InitialR2T") == 0) {
530 keys_add(response_keys, name, "Yes");
531 } else if (strcmp(name, "ImmediateData") == 0) {
532 if (conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY) {
533 log_debugx("discovery session; ImmediateData irrelevant");
534 keys_add(response_keys, name, "Irrelevant");
536 if (strcmp(value, "Yes") == 0) {
537 conn->conn_immediate_data = true;
538 keys_add(response_keys, name, "Yes");
540 conn->conn_immediate_data = false;
541 keys_add(response_keys, name, "No");
544 } else if (strcmp(name, "MaxRecvDataSegmentLength") == 0) {
545 tmp = strtoul(value, NULL, 10);
547 login_send_error(request, 0x02, 0x00);
548 log_errx(1, "received invalid "
549 "MaxRecvDataSegmentLength");
551 if (tmp > MAX_DATA_SEGMENT_LENGTH) {
552 log_debugx("capping MaxRecvDataSegmentLength "
553 "from %d to %d", tmp, MAX_DATA_SEGMENT_LENGTH);
554 tmp = MAX_DATA_SEGMENT_LENGTH;
556 conn->conn_max_data_segment_length = tmp;
557 keys_add_int(response_keys, name, MAX_DATA_SEGMENT_LENGTH);
558 } else if (strcmp(name, "MaxBurstLength") == 0) {
559 tmp = strtoul(value, NULL, 10);
561 login_send_error(request, 0x02, 0x00);
562 log_errx(1, "received invalid MaxBurstLength");
564 if (tmp > MAX_BURST_LENGTH) {
565 log_debugx("capping MaxBurstLength from %d to %d",
566 tmp, MAX_BURST_LENGTH);
567 tmp = MAX_BURST_LENGTH;
569 conn->conn_max_burst_length = tmp;
570 keys_add(response_keys, name, value);
571 } else if (strcmp(name, "FirstBurstLength") == 0) {
572 tmp = strtoul(value, NULL, 10);
574 login_send_error(request, 0x02, 0x00);
575 log_errx(1, "received invalid "
578 if (tmp > MAX_DATA_SEGMENT_LENGTH) {
579 log_debugx("capping FirstBurstLength from %d to %d",
580 tmp, MAX_DATA_SEGMENT_LENGTH);
581 tmp = MAX_DATA_SEGMENT_LENGTH;
584 * We don't pass the value to the kernel; it only enforces
585 * hardcoded limit anyway.
587 keys_add_int(response_keys, name, tmp);
588 } else if (strcmp(name, "DefaultTime2Wait") == 0) {
589 keys_add(response_keys, name, value);
590 } else if (strcmp(name, "DefaultTime2Retain") == 0) {
591 keys_add(response_keys, name, "0");
592 } else if (strcmp(name, "MaxOutstandingR2T") == 0) {
593 keys_add(response_keys, name, "1");
594 } else if (strcmp(name, "DataPDUInOrder") == 0) {
595 keys_add(response_keys, name, "Yes");
596 } else if (strcmp(name, "DataSequenceInOrder") == 0) {
597 keys_add(response_keys, name, "Yes");
598 } else if (strcmp(name, "ErrorRecoveryLevel") == 0) {
599 keys_add(response_keys, name, "0");
600 } else if (strcmp(name, "OFMarker") == 0) {
601 keys_add(response_keys, name, "No");
602 } else if (strcmp(name, "IFMarker") == 0) {
603 keys_add(response_keys, name, "No");
604 } else if (strcmp(name, "iSCSIProtocolLevel") == 0) {
605 tmp = strtoul(value, NULL, 10);
608 keys_add_int(response_keys, name, tmp);
610 log_debugx("unknown key \"%s\"; responding "
611 "with NotUnderstood", name);
612 keys_add(response_keys, name, "NotUnderstood");
617 login_redirect(struct pdu *request, const char *target_address)
619 struct pdu *response;
620 struct iscsi_bhs_login_response *bhslr2;
621 struct keys *response_keys;
623 response = login_new_response(request);
624 login_set_csg(response, login_csg(request));
625 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
626 bhslr2->bhslr_status_class = 0x01;
627 bhslr2->bhslr_status_detail = 0x01;
629 response_keys = keys_new();
630 keys_add(response_keys, "TargetAddress", target_address);
632 keys_save(response_keys, response);
634 pdu_delete(response);
635 keys_delete(response_keys);
639 login_portal_redirect(struct connection *conn, struct pdu *request)
641 const struct portal_group *pg;
643 pg = conn->conn_portal->p_portal_group;
644 if (pg->pg_redirection == NULL)
647 log_debugx("portal-group \"%s\" configured to redirect to %s",
648 pg->pg_name, pg->pg_redirection);
649 login_redirect(request, pg->pg_redirection);
655 login_target_redirect(struct connection *conn, struct pdu *request)
657 const char *target_address;
659 assert(conn->conn_portal->p_portal_group->pg_redirection == NULL);
661 if (conn->conn_target == NULL)
664 target_address = conn->conn_target->t_redirection;
665 if (target_address == NULL)
668 log_debugx("target \"%s\" configured to redirect to %s",
669 conn->conn_target->t_name, target_address);
670 login_redirect(request, target_address);
676 login_negotiate(struct connection *conn, struct pdu *request)
678 struct pdu *response;
679 struct iscsi_bhs_login_response *bhslr2;
680 struct keys *request_keys, *response_keys;
682 bool redirected, skipped_security;
684 if (request == NULL) {
685 log_debugx("beginning operational parameter negotiation; "
686 "waiting for Login PDU");
687 request = login_receive(conn, false);
688 skipped_security = false;
690 skipped_security = true;
693 * RFC 3720, 10.13.5. Status-Class and Status-Detail, says
694 * the redirection SHOULD be accepted by the initiator before
695 * authentication, but MUST be be accepted afterwards; that's
696 * why we're doing it here and not earlier.
698 redirected = login_target_redirect(conn, request);
700 log_debugx("initiator redirected; exiting");
704 request_keys = keys_new();
705 keys_load(request_keys, request);
707 response = login_new_response(request);
708 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
709 bhslr2->bhslr_tsih = htons(0xbadd);
710 login_set_csg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
711 login_set_nsg(response, BHSLR_STAGE_FULL_FEATURE_PHASE);
712 response_keys = keys_new();
714 if (skipped_security &&
715 conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
716 if (conn->conn_target->t_alias != NULL)
717 keys_add(response_keys,
718 "TargetAlias", conn->conn_target->t_alias);
719 keys_add_int(response_keys, "TargetPortalGroupTag",
720 conn->conn_portal->p_portal_group->pg_tag);
723 for (i = 0; i < KEYS_MAX; i++) {
724 if (request_keys->keys_names[i] == NULL)
727 login_negotiate_key(request, request_keys->keys_names[i],
728 request_keys->keys_values[i], skipped_security,
732 log_debugx("operational parameter negotiation done; "
733 "transitioning to Full Feature Phase");
735 keys_save(response_keys, response);
737 pdu_delete(response);
738 keys_delete(response_keys);
740 keys_delete(request_keys);
744 login_wait_transition(struct connection *conn)
746 struct pdu *request, *response;
747 struct iscsi_bhs_login_request *bhslr;
749 log_debugx("waiting for state transition request");
750 request = login_receive(conn, false);
751 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
752 if ((bhslr->bhslr_flags & BHSLR_FLAGS_TRANSIT) == 0) {
753 login_send_error(request, 0x02, 0x00);
754 log_errx(1, "got no \"T\" flag after answering AuthMethod");
758 log_debugx("got state transition request");
759 response = login_new_response(request);
760 login_set_nsg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
762 pdu_delete(response);
764 login_negotiate(conn, NULL);
768 login(struct connection *conn)
770 struct pdu *request, *response;
771 struct iscsi_bhs_login_request *bhslr;
772 struct keys *request_keys, *response_keys;
773 struct auth_group *ag;
774 struct portal_group *pg;
775 const char *initiator_name, *initiator_alias, *session_type,
776 *target_name, *auth_method;
777 bool redirected, fail, trans;
780 * Handle the initial Login Request - figure out required authentication
781 * method and either transition to the next phase, if no authentication
782 * is required, or call appropriate authentication code.
784 log_debugx("beginning Login Phase; waiting for Login PDU");
785 request = login_receive(conn, true);
786 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
787 if (bhslr->bhslr_tsih != 0) {
788 login_send_error(request, 0x02, 0x0a);
789 log_errx(1, "received Login PDU with non-zero TSIH");
792 pg = conn->conn_portal->p_portal_group;
794 memcpy(conn->conn_initiator_isid, bhslr->bhslr_isid,
795 sizeof(conn->conn_initiator_isid));
798 * XXX: Implement the C flag some day.
800 request_keys = keys_new();
801 keys_load(request_keys, request);
803 assert(conn->conn_initiator_name == NULL);
804 initiator_name = keys_find(request_keys, "InitiatorName");
805 if (initiator_name == NULL) {
806 login_send_error(request, 0x02, 0x07);
807 log_errx(1, "received Login PDU without InitiatorName");
809 if (valid_iscsi_name(initiator_name) == false) {
810 login_send_error(request, 0x02, 0x00);
811 log_errx(1, "received Login PDU with invalid InitiatorName");
813 conn->conn_initiator_name = checked_strdup(initiator_name);
814 log_set_peer_name(conn->conn_initiator_name);
815 setproctitle("%s (%s)", conn->conn_initiator_addr, conn->conn_initiator_name);
817 redirected = login_portal_redirect(conn, request);
819 log_debugx("initiator redirected; exiting");
823 initiator_alias = keys_find(request_keys, "InitiatorAlias");
824 if (initiator_alias != NULL)
825 conn->conn_initiator_alias = checked_strdup(initiator_alias);
827 assert(conn->conn_session_type == CONN_SESSION_TYPE_NONE);
828 session_type = keys_find(request_keys, "SessionType");
829 if (session_type != NULL) {
830 if (strcmp(session_type, "Normal") == 0) {
831 conn->conn_session_type = CONN_SESSION_TYPE_NORMAL;
832 } else if (strcmp(session_type, "Discovery") == 0) {
833 conn->conn_session_type = CONN_SESSION_TYPE_DISCOVERY;
835 login_send_error(request, 0x02, 0x00);
836 log_errx(1, "received Login PDU with invalid "
837 "SessionType \"%s\"", session_type);
840 conn->conn_session_type = CONN_SESSION_TYPE_NORMAL;
842 assert(conn->conn_target == NULL);
843 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
844 target_name = keys_find(request_keys, "TargetName");
845 if (target_name == NULL) {
846 login_send_error(request, 0x02, 0x07);
847 log_errx(1, "received Login PDU without TargetName");
850 conn->conn_port = port_find_in_pg(pg, target_name);
851 if (conn->conn_port == NULL) {
852 login_send_error(request, 0x02, 0x03);
853 log_errx(1, "requested target \"%s\" not found",
856 conn->conn_target = conn->conn_port->p_target;
860 * At this point we know what kind of authentication we need.
862 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
863 ag = conn->conn_port->p_auth_group;
865 ag = conn->conn_target->t_auth_group;
866 if (ag->ag_name != NULL) {
867 log_debugx("initiator requests to connect "
868 "to target \"%s\"; auth-group \"%s\"",
869 conn->conn_target->t_name,
872 log_debugx("initiator requests to connect "
873 "to target \"%s\"", conn->conn_target->t_name);
876 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
877 ag = pg->pg_discovery_auth_group;
878 if (ag->ag_name != NULL) {
879 log_debugx("initiator requests "
880 "discovery session; auth-group \"%s\"", ag->ag_name);
882 log_debugx("initiator requests discovery session");
886 if (ag->ag_type == AG_TYPE_DENY) {
887 login_send_error(request, 0x02, 0x01);
888 log_errx(1, "auth-type is \"deny\"");
891 if (ag->ag_type == AG_TYPE_UNKNOWN) {
893 * This can happen with empty auth-group.
895 login_send_error(request, 0x02, 0x01);
896 log_errx(1, "auth-type not set, denying access");
900 * Enforce initiator-name and initiator-portal.
902 if (auth_name_check(ag, initiator_name) != 0) {
903 login_send_error(request, 0x02, 0x02);
904 log_errx(1, "initiator does not match allowed initiator names");
907 if (auth_portal_check(ag, &conn->conn_initiator_sa) != 0) {
908 login_send_error(request, 0x02, 0x02);
909 log_errx(1, "initiator does not match allowed "
910 "initiator portals");
914 * Let's see if the initiator intends to do any kind of authentication
917 if (login_csg(request) == BHSLR_STAGE_OPERATIONAL_NEGOTIATION) {
918 if (ag->ag_type != AG_TYPE_NO_AUTHENTICATION) {
919 login_send_error(request, 0x02, 0x01);
920 log_errx(1, "initiator skipped the authentication, "
921 "but authentication is required");
924 keys_delete(request_keys);
926 log_debugx("initiator skipped the authentication, "
927 "and we don't need it; proceeding with negotiation");
928 login_negotiate(conn, request);
933 response = login_new_response(request);
934 response_keys = keys_new();
935 trans = (bhslr->bhslr_flags & BHSLR_FLAGS_TRANSIT) != 0;
936 auth_method = keys_find(request_keys, "AuthMethod");
937 if (ag->ag_type == AG_TYPE_NO_AUTHENTICATION) {
938 log_debugx("authentication not required");
939 if (auth_method == NULL ||
940 login_list_contains(auth_method, "None")) {
941 keys_add(response_keys, "AuthMethod", "None");
943 log_warnx("initiator requests "
944 "AuthMethod \"%s\" instead of \"None\"",
946 keys_add(response_keys, "AuthMethod", "Reject");
949 login_set_nsg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
951 log_debugx("CHAP authentication required");
952 if (auth_method == NULL ||
953 login_list_contains(auth_method, "CHAP")) {
954 keys_add(response_keys, "AuthMethod", "CHAP");
956 log_warnx("initiator requests unsupported "
957 "AuthMethod \"%s\" instead of \"CHAP\"",
959 keys_add(response_keys, "AuthMethod", "Reject");
963 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
964 if (conn->conn_target->t_alias != NULL)
965 keys_add(response_keys,
966 "TargetAlias", conn->conn_target->t_alias);
967 keys_add_int(response_keys,
968 "TargetPortalGroupTag", pg->pg_tag);
970 keys_save(response_keys, response);
973 pdu_delete(response);
974 keys_delete(response_keys);
976 keys_delete(request_keys);
979 log_debugx("sent reject for AuthMethod; exiting");
983 if (ag->ag_type != AG_TYPE_NO_AUTHENTICATION) {
984 login_chap(conn, ag);
985 login_negotiate(conn, NULL);
987 login_negotiate(conn, NULL);
989 login_wait_transition(conn);