e4b6e911a2
not, by itself, a protocol error. This fixes interoperability with OpenBSD initiator. Sponsored by: The FreeBSD Foundation
219 lines
7.1 KiB
C
219 lines
7.1 KiB
C
/*-
|
|
* Copyright (c) 2012 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Edward Tomasz Napierala under sponsorship
|
|
* from the FreeBSD Foundation.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include "ctld.h"
|
|
#include "iscsi_proto.h"
|
|
|
|
static struct pdu *
|
|
text_receive(struct connection *conn)
|
|
{
|
|
struct pdu *request;
|
|
struct iscsi_bhs_text_request *bhstr;
|
|
|
|
request = pdu_new(conn);
|
|
pdu_receive(request);
|
|
if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
|
|
ISCSI_BHS_OPCODE_TEXT_REQUEST)
|
|
log_errx(1, "protocol error: received invalid opcode 0x%x",
|
|
request->pdu_bhs->bhs_opcode);
|
|
bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
|
|
#if 0
|
|
if ((bhstr->bhstr_flags & ISCSI_BHSTR_FLAGS_FINAL) == 0)
|
|
log_errx(1, "received Text PDU without the \"F\" flag");
|
|
#endif
|
|
/*
|
|
* XXX: Implement the C flag some day.
|
|
*/
|
|
if ((bhstr->bhstr_flags & BHSTR_FLAGS_CONTINUE) != 0)
|
|
log_errx(1, "received Text PDU with unsupported \"C\" flag");
|
|
if (ntohl(bhstr->bhstr_cmdsn) < conn->conn_cmdsn) {
|
|
log_errx(1, "received Text PDU with decreasing CmdSN: "
|
|
"was %d, is %d", conn->conn_cmdsn, ntohl(bhstr->bhstr_cmdsn));
|
|
}
|
|
if (ntohl(bhstr->bhstr_expstatsn) != conn->conn_statsn) {
|
|
log_errx(1, "received Text PDU with wrong StatSN: "
|
|
"is %d, should be %d", ntohl(bhstr->bhstr_expstatsn),
|
|
conn->conn_statsn);
|
|
}
|
|
conn->conn_cmdsn = ntohl(bhstr->bhstr_cmdsn);
|
|
|
|
return (request);
|
|
}
|
|
|
|
static struct pdu *
|
|
text_new_response(struct pdu *request)
|
|
{
|
|
struct pdu *response;
|
|
struct connection *conn;
|
|
struct iscsi_bhs_text_request *bhstr;
|
|
struct iscsi_bhs_text_response *bhstr2;
|
|
|
|
bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
|
|
conn = request->pdu_connection;
|
|
|
|
response = pdu_new_response(request);
|
|
bhstr2 = (struct iscsi_bhs_text_response *)response->pdu_bhs;
|
|
bhstr2->bhstr_opcode = ISCSI_BHS_OPCODE_TEXT_RESPONSE;
|
|
bhstr2->bhstr_flags = BHSTR_FLAGS_FINAL;
|
|
bhstr2->bhstr_lun = bhstr->bhstr_lun;
|
|
bhstr2->bhstr_initiator_task_tag = bhstr->bhstr_initiator_task_tag;
|
|
bhstr2->bhstr_target_transfer_tag = bhstr->bhstr_target_transfer_tag;
|
|
bhstr2->bhstr_statsn = htonl(conn->conn_statsn++);
|
|
bhstr2->bhstr_expcmdsn = htonl(conn->conn_cmdsn);
|
|
bhstr2->bhstr_maxcmdsn = htonl(conn->conn_cmdsn);
|
|
|
|
return (response);
|
|
}
|
|
|
|
static struct pdu *
|
|
logout_receive(struct connection *conn)
|
|
{
|
|
struct pdu *request;
|
|
struct iscsi_bhs_logout_request *bhslr;
|
|
|
|
request = pdu_new(conn);
|
|
pdu_receive(request);
|
|
if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
|
|
ISCSI_BHS_OPCODE_LOGOUT_REQUEST)
|
|
log_errx(1, "protocol error: received invalid opcode 0x%x",
|
|
request->pdu_bhs->bhs_opcode);
|
|
bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
|
|
if ((bhslr->bhslr_reason & 0x7f) != BHSLR_REASON_CLOSE_SESSION)
|
|
log_debugx("received Logout PDU with invalid reason 0x%x; "
|
|
"continuing anyway", bhslr->bhslr_reason & 0x7f);
|
|
if (ntohl(bhslr->bhslr_cmdsn) < conn->conn_cmdsn) {
|
|
log_errx(1, "received Logout PDU with decreasing CmdSN: "
|
|
"was %d, is %d", conn->conn_cmdsn,
|
|
ntohl(bhslr->bhslr_cmdsn));
|
|
}
|
|
if (ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
|
|
log_errx(1, "received Logout PDU with wrong StatSN: "
|
|
"is %d, should be %d", ntohl(bhslr->bhslr_expstatsn),
|
|
conn->conn_statsn);
|
|
}
|
|
conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
|
|
|
|
return (request);
|
|
}
|
|
|
|
static struct pdu *
|
|
logout_new_response(struct pdu *request)
|
|
{
|
|
struct pdu *response;
|
|
struct connection *conn;
|
|
struct iscsi_bhs_logout_request *bhslr;
|
|
struct iscsi_bhs_logout_response *bhslr2;
|
|
|
|
bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
|
|
conn = request->pdu_connection;
|
|
|
|
response = pdu_new_response(request);
|
|
bhslr2 = (struct iscsi_bhs_logout_response *)response->pdu_bhs;
|
|
bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
|
|
bhslr2->bhslr_flags = 0x80;
|
|
bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
|
|
bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag;
|
|
bhslr2->bhslr_statsn = htonl(conn->conn_statsn++);
|
|
bhslr2->bhslr_expcmdsn = htonl(conn->conn_cmdsn);
|
|
bhslr2->bhslr_maxcmdsn = htonl(conn->conn_cmdsn);
|
|
|
|
return (response);
|
|
}
|
|
|
|
void
|
|
discovery(struct connection *conn)
|
|
{
|
|
struct pdu *request, *response;
|
|
struct keys *request_keys, *response_keys;
|
|
struct target *targ;
|
|
const char *send_targets;
|
|
|
|
log_debugx("beginning discovery session; waiting for Text PDU");
|
|
request = text_receive(conn);
|
|
request_keys = keys_new();
|
|
keys_load(request_keys, request);
|
|
|
|
send_targets = keys_find(request_keys, "SendTargets");
|
|
if (send_targets == NULL)
|
|
log_errx(1, "received Text PDU without SendTargets");
|
|
|
|
response = text_new_response(request);
|
|
response_keys = keys_new();
|
|
|
|
if (strcmp(send_targets, "All") == 0) {
|
|
TAILQ_FOREACH(targ,
|
|
&conn->conn_portal->p_portal_group->pg_conf->conf_targets,
|
|
t_next) {
|
|
if (targ->t_portal_group !=
|
|
conn->conn_portal->p_portal_group) {
|
|
log_debugx("not returning target \"%s\"; "
|
|
"belongs to a different portal group",
|
|
targ->t_iqn);
|
|
continue;
|
|
}
|
|
keys_add(response_keys, "TargetName", targ->t_iqn);
|
|
}
|
|
} else {
|
|
targ = target_find(conn->conn_portal->p_portal_group->pg_conf,
|
|
send_targets);
|
|
if (targ == NULL) {
|
|
log_debugx("initiator requested information on unknown "
|
|
"target \"%s\"; returning nothing", send_targets);
|
|
} else {
|
|
keys_add(response_keys, "TargetName", targ->t_iqn);
|
|
}
|
|
}
|
|
keys_save(response_keys, response);
|
|
|
|
pdu_send(response);
|
|
pdu_delete(response);
|
|
keys_delete(response_keys);
|
|
pdu_delete(request);
|
|
keys_delete(request_keys);
|
|
|
|
log_debugx("done sending targets; waiting for Logout PDU");
|
|
request = logout_receive(conn);
|
|
response = logout_new_response(request);
|
|
|
|
pdu_send(response);
|
|
pdu_delete(response);
|
|
pdu_delete(request);
|
|
|
|
log_debugx("discovery session done");
|
|
}
|