1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
339 lines
10 KiB
C
339 lines
10 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include "ctld.h"
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#include "iscsi_proto.h"
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static struct pdu *
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text_receive(struct connection *conn)
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{
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struct pdu *request;
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struct iscsi_bhs_text_request *bhstr;
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request = pdu_new(conn);
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pdu_receive(request);
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if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
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ISCSI_BHS_OPCODE_TEXT_REQUEST)
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log_errx(1, "protocol error: received invalid opcode 0x%x",
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request->pdu_bhs->bhs_opcode);
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bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
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#if 0
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if ((bhstr->bhstr_flags & ISCSI_BHSTR_FLAGS_FINAL) == 0)
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log_errx(1, "received Text PDU without the \"F\" flag");
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#endif
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/*
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* XXX: Implement the C flag some day.
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*/
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if ((bhstr->bhstr_flags & BHSTR_FLAGS_CONTINUE) != 0)
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log_errx(1, "received Text PDU with unsupported \"C\" flag");
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if (ISCSI_SNLT(ntohl(bhstr->bhstr_cmdsn), conn->conn_cmdsn)) {
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log_errx(1, "received Text PDU with decreasing CmdSN: "
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"was %u, is %u", conn->conn_cmdsn, ntohl(bhstr->bhstr_cmdsn));
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}
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if (ntohl(bhstr->bhstr_expstatsn) != conn->conn_statsn) {
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log_errx(1, "received Text PDU with wrong ExpStatSN: "
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"is %u, should be %u", ntohl(bhstr->bhstr_expstatsn),
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conn->conn_statsn);
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}
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conn->conn_cmdsn = ntohl(bhstr->bhstr_cmdsn);
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if ((bhstr->bhstr_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0)
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conn->conn_cmdsn++;
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return (request);
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}
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static struct pdu *
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text_new_response(struct pdu *request)
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{
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struct pdu *response;
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struct connection *conn;
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struct iscsi_bhs_text_request *bhstr;
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struct iscsi_bhs_text_response *bhstr2;
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bhstr = (struct iscsi_bhs_text_request *)request->pdu_bhs;
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conn = request->pdu_connection;
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response = pdu_new_response(request);
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bhstr2 = (struct iscsi_bhs_text_response *)response->pdu_bhs;
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bhstr2->bhstr_opcode = ISCSI_BHS_OPCODE_TEXT_RESPONSE;
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bhstr2->bhstr_flags = BHSTR_FLAGS_FINAL;
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bhstr2->bhstr_lun = bhstr->bhstr_lun;
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bhstr2->bhstr_initiator_task_tag = bhstr->bhstr_initiator_task_tag;
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bhstr2->bhstr_target_transfer_tag = bhstr->bhstr_target_transfer_tag;
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bhstr2->bhstr_statsn = htonl(conn->conn_statsn++);
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bhstr2->bhstr_expcmdsn = htonl(conn->conn_cmdsn);
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bhstr2->bhstr_maxcmdsn = htonl(conn->conn_cmdsn);
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return (response);
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}
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static struct pdu *
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logout_receive(struct connection *conn)
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{
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struct pdu *request;
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struct iscsi_bhs_logout_request *bhslr;
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request = pdu_new(conn);
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pdu_receive(request);
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if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
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ISCSI_BHS_OPCODE_LOGOUT_REQUEST)
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log_errx(1, "protocol error: received invalid opcode 0x%x",
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request->pdu_bhs->bhs_opcode);
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bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
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if ((bhslr->bhslr_reason & 0x7f) != BHSLR_REASON_CLOSE_SESSION)
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log_debugx("received Logout PDU with invalid reason 0x%x; "
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"continuing anyway", bhslr->bhslr_reason & 0x7f);
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if (ISCSI_SNLT(ntohl(bhslr->bhslr_cmdsn), conn->conn_cmdsn)) {
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log_errx(1, "received Logout PDU with decreasing CmdSN: "
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"was %u, is %u", conn->conn_cmdsn,
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ntohl(bhslr->bhslr_cmdsn));
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}
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if (ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
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log_errx(1, "received Logout PDU with wrong ExpStatSN: "
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"is %u, should be %u", ntohl(bhslr->bhslr_expstatsn),
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conn->conn_statsn);
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}
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conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
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if ((bhslr->bhslr_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0)
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conn->conn_cmdsn++;
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return (request);
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}
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static struct pdu *
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logout_new_response(struct pdu *request)
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{
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struct pdu *response;
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struct connection *conn;
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struct iscsi_bhs_logout_request *bhslr;
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struct iscsi_bhs_logout_response *bhslr2;
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bhslr = (struct iscsi_bhs_logout_request *)request->pdu_bhs;
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conn = request->pdu_connection;
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response = pdu_new_response(request);
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bhslr2 = (struct iscsi_bhs_logout_response *)response->pdu_bhs;
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bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
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bhslr2->bhslr_flags = 0x80;
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bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
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bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag;
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bhslr2->bhslr_statsn = htonl(conn->conn_statsn++);
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bhslr2->bhslr_expcmdsn = htonl(conn->conn_cmdsn);
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bhslr2->bhslr_maxcmdsn = htonl(conn->conn_cmdsn);
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return (response);
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}
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static void
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discovery_add_target(struct keys *response_keys, const struct target *targ)
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{
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struct port *port;
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struct portal *portal;
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char *buf;
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char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
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struct addrinfo *ai;
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int ret;
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keys_add(response_keys, "TargetName", targ->t_name);
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TAILQ_FOREACH(port, &targ->t_ports, p_ts) {
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if (port->p_portal_group == NULL)
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continue;
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TAILQ_FOREACH(portal, &port->p_portal_group->pg_portals, p_next) {
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ai = portal->p_ai;
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ret = getnameinfo(ai->ai_addr, ai->ai_addrlen,
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hbuf, sizeof(hbuf), sbuf, sizeof(sbuf),
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NI_NUMERICHOST | NI_NUMERICSERV);
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if (ret != 0) {
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log_warnx("getnameinfo: %s", gai_strerror(ret));
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continue;
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}
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switch (ai->ai_addr->sa_family) {
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case AF_INET:
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if (strcmp(hbuf, "0.0.0.0") == 0)
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continue;
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ret = asprintf(&buf, "%s:%s,%d", hbuf, sbuf,
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port->p_portal_group->pg_tag);
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break;
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case AF_INET6:
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if (strcmp(hbuf, "::") == 0)
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continue;
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ret = asprintf(&buf, "[%s]:%s,%d", hbuf, sbuf,
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port->p_portal_group->pg_tag);
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break;
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default:
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continue;
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}
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if (ret <= 0)
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log_err(1, "asprintf");
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keys_add(response_keys, "TargetAddress", buf);
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free(buf);
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}
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}
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}
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static bool
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discovery_target_filtered_out(const struct connection *conn,
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const struct port *port)
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{
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const struct auth_group *ag;
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const struct portal_group *pg;
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const struct target *targ;
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const struct auth *auth;
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int error;
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targ = port->p_target;
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ag = port->p_auth_group;
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if (ag == NULL)
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ag = targ->t_auth_group;
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pg = conn->conn_portal->p_portal_group;
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assert(pg->pg_discovery_auth_group != PG_FILTER_UNKNOWN);
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if (pg->pg_discovery_filter >= PG_FILTER_PORTAL &&
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auth_portal_check(ag, &conn->conn_initiator_sa) != 0) {
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log_debugx("initiator does not match initiator portals "
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"allowed for target \"%s\"; skipping", targ->t_name);
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return (true);
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}
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if (pg->pg_discovery_filter >= PG_FILTER_PORTAL_NAME &&
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auth_name_check(ag, conn->conn_initiator_name) != 0) {
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log_debugx("initiator does not match initiator names "
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"allowed for target \"%s\"; skipping", targ->t_name);
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return (true);
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}
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if (pg->pg_discovery_filter >= PG_FILTER_PORTAL_NAME_AUTH &&
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ag->ag_type != AG_TYPE_NO_AUTHENTICATION) {
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if (conn->conn_chap == NULL) {
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assert(pg->pg_discovery_auth_group->ag_type ==
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AG_TYPE_NO_AUTHENTICATION);
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log_debugx("initiator didn't authenticate, but target "
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"\"%s\" requires CHAP; skipping", targ->t_name);
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return (true);
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}
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assert(conn->conn_user != NULL);
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auth = auth_find(ag, conn->conn_user);
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if (auth == NULL) {
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log_debugx("CHAP user \"%s\" doesn't match target "
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"\"%s\"; skipping", conn->conn_user, targ->t_name);
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return (true);
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}
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error = chap_authenticate(conn->conn_chap, auth->a_secret);
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if (error != 0) {
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log_debugx("password for CHAP user \"%s\" doesn't "
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"match target \"%s\"; skipping",
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conn->conn_user, targ->t_name);
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return (true);
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}
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}
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return (false);
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}
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void
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discovery(struct connection *conn)
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{
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struct pdu *request, *response;
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struct keys *request_keys, *response_keys;
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const struct port *port;
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const struct portal_group *pg;
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const char *send_targets;
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pg = conn->conn_portal->p_portal_group;
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log_debugx("beginning discovery session; waiting for Text PDU");
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request = text_receive(conn);
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request_keys = keys_new();
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keys_load(request_keys, request);
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send_targets = keys_find(request_keys, "SendTargets");
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if (send_targets == NULL)
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log_errx(1, "received Text PDU without SendTargets");
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response = text_new_response(request);
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response_keys = keys_new();
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if (strcmp(send_targets, "All") == 0) {
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TAILQ_FOREACH(port, &pg->pg_ports, p_pgs) {
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if (discovery_target_filtered_out(conn, port)) {
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/* Ignore this target. */
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continue;
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}
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discovery_add_target(response_keys, port->p_target);
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}
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} else {
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port = port_find_in_pg(pg, send_targets);
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if (port == NULL) {
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log_debugx("initiator requested information on unknown "
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"target \"%s\"; returning nothing", send_targets);
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} else {
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if (discovery_target_filtered_out(conn, port)) {
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/* Ignore this target. */
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} else {
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discovery_add_target(response_keys, port->p_target);
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}
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}
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}
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keys_save(response_keys, response);
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pdu_send(response);
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pdu_delete(response);
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keys_delete(response_keys);
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pdu_delete(request);
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keys_delete(request_keys);
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log_debugx("done sending targets; waiting for Logout PDU");
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request = logout_receive(conn);
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response = logout_new_response(request);
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pdu_send(response);
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pdu_delete(response);
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pdu_delete(request);
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log_debugx("discovery session done");
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}
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