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.
311 lines
7.0 KiB
C
311 lines
7.0 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 <sys/types.h>
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#include <sys/uio.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "iscsid.h"
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#include "iscsi_proto.h"
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#ifdef ICL_KERNEL_PROXY
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#include <sys/ioctl.h>
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#endif
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static int
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pdu_ahs_length(const struct pdu *pdu)
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{
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return (pdu->pdu_bhs->bhs_total_ahs_len * 4);
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}
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static int
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pdu_data_segment_length(const struct pdu *pdu)
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{
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uint32_t len = 0;
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len += pdu->pdu_bhs->bhs_data_segment_len[0];
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len <<= 8;
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len += pdu->pdu_bhs->bhs_data_segment_len[1];
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len <<= 8;
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len += pdu->pdu_bhs->bhs_data_segment_len[2];
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return (len);
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}
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static void
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pdu_set_data_segment_length(struct pdu *pdu, uint32_t len)
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{
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pdu->pdu_bhs->bhs_data_segment_len[2] = len;
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pdu->pdu_bhs->bhs_data_segment_len[1] = len >> 8;
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pdu->pdu_bhs->bhs_data_segment_len[0] = len >> 16;
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}
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struct pdu *
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pdu_new(struct connection *conn)
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{
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struct pdu *pdu;
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pdu = calloc(1, sizeof(*pdu));
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if (pdu == NULL)
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log_err(1, "calloc");
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pdu->pdu_bhs = calloc(1, sizeof(*pdu->pdu_bhs));
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if (pdu->pdu_bhs == NULL)
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log_err(1, "calloc");
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pdu->pdu_connection = conn;
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return (pdu);
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}
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struct pdu *
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pdu_new_response(struct pdu *request)
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{
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return (pdu_new(request->pdu_connection));
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}
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#ifdef ICL_KERNEL_PROXY
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static void
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pdu_receive_proxy(struct pdu *pdu)
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{
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struct connection *conn;
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struct iscsi_daemon_receive *idr;
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size_t len;
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int error;
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conn = pdu->pdu_connection;
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assert(conn->conn_conf.isc_iser != 0);
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pdu->pdu_data = malloc(conn->conn_max_recv_data_segment_length);
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if (pdu->pdu_data == NULL)
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log_err(1, "malloc");
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idr = calloc(1, sizeof(*idr));
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if (idr == NULL)
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log_err(1, "calloc");
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idr->idr_session_id = conn->conn_session_id;
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idr->idr_bhs = pdu->pdu_bhs;
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idr->idr_data_segment_len = conn->conn_max_recv_data_segment_length;
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idr->idr_data_segment = pdu->pdu_data;
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error = ioctl(conn->conn_iscsi_fd, ISCSIDRECEIVE, idr);
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if (error != 0)
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log_err(1, "ISCSIDRECEIVE");
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len = pdu_ahs_length(pdu);
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if (len > 0)
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log_errx(1, "protocol error: non-empty AHS");
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len = pdu_data_segment_length(pdu);
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assert(len <= (size_t)conn->conn_max_recv_data_segment_length);
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pdu->pdu_data_len = len;
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free(idr);
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}
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static void
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pdu_send_proxy(struct pdu *pdu)
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{
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struct connection *conn;
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struct iscsi_daemon_send *ids;
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int error;
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conn = pdu->pdu_connection;
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assert(conn->conn_conf.isc_iser != 0);
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pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
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ids = calloc(1, sizeof(*ids));
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if (ids == NULL)
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log_err(1, "calloc");
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ids->ids_session_id = conn->conn_session_id;
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ids->ids_bhs = pdu->pdu_bhs;
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ids->ids_data_segment_len = pdu->pdu_data_len;
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ids->ids_data_segment = pdu->pdu_data;
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error = ioctl(conn->conn_iscsi_fd, ISCSIDSEND, ids);
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if (error != 0)
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log_err(1, "ISCSIDSEND");
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free(ids);
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}
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#endif /* ICL_KERNEL_PROXY */
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static size_t
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pdu_padding(const struct pdu *pdu)
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{
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if ((pdu->pdu_data_len % 4) != 0)
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return (4 - (pdu->pdu_data_len % 4));
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return (0);
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}
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static void
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pdu_read(const struct connection *conn, char *data, size_t len)
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{
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ssize_t ret;
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while (len > 0) {
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ret = read(conn->conn_socket, data, len);
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if (ret < 0) {
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if (timed_out()) {
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fail(conn, "Login Phase timeout");
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log_errx(1, "exiting due to timeout");
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}
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fail(conn, strerror(errno));
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log_err(1, "read");
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} else if (ret == 0) {
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fail(conn, "connection lost");
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log_errx(1, "read: connection lost");
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}
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len -= ret;
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data += ret;
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}
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}
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void
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pdu_receive(struct pdu *pdu)
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{
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struct connection *conn;
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size_t len, padding;
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char dummy[4];
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conn = pdu->pdu_connection;
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#ifdef ICL_KERNEL_PROXY
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if (conn->conn_conf.isc_iser != 0)
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return (pdu_receive_proxy(pdu));
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#endif
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assert(conn->conn_conf.isc_iser == 0);
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pdu_read(conn, (char *)pdu->pdu_bhs, sizeof(*pdu->pdu_bhs));
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len = pdu_ahs_length(pdu);
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if (len > 0)
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log_errx(1, "protocol error: non-empty AHS");
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len = pdu_data_segment_length(pdu);
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if (len > 0) {
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if (len > (size_t)conn->conn_max_recv_data_segment_length) {
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log_errx(1, "protocol error: received PDU "
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"with DataSegmentLength exceeding %d",
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conn->conn_max_recv_data_segment_length);
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}
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pdu->pdu_data_len = len;
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pdu->pdu_data = malloc(len);
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if (pdu->pdu_data == NULL)
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log_err(1, "malloc");
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pdu_read(conn, (char *)pdu->pdu_data, pdu->pdu_data_len);
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padding = pdu_padding(pdu);
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if (padding != 0) {
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assert(padding < sizeof(dummy));
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pdu_read(conn, (char *)dummy, padding);
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}
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}
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}
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void
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pdu_send(struct pdu *pdu)
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{
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struct connection *conn;
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ssize_t ret, total_len;
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size_t padding;
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uint32_t zero = 0;
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struct iovec iov[3];
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int iovcnt;
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conn = pdu->pdu_connection;
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#ifdef ICL_KERNEL_PROXY
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if (conn->conn_conf.isc_iser != 0)
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return (pdu_send_proxy(pdu));
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#endif
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assert(conn->conn_conf.isc_iser == 0);
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pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
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iov[0].iov_base = pdu->pdu_bhs;
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iov[0].iov_len = sizeof(*pdu->pdu_bhs);
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total_len = iov[0].iov_len;
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iovcnt = 1;
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if (pdu->pdu_data_len > 0) {
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iov[1].iov_base = pdu->pdu_data;
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iov[1].iov_len = pdu->pdu_data_len;
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total_len += iov[1].iov_len;
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iovcnt = 2;
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padding = pdu_padding(pdu);
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if (padding > 0) {
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assert(padding < sizeof(zero));
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iov[2].iov_base = &zero;
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iov[2].iov_len = padding;
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total_len += iov[2].iov_len;
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iovcnt = 3;
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}
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}
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ret = writev(conn->conn_socket, iov, iovcnt);
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if (ret < 0) {
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if (timed_out())
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log_errx(1, "exiting due to timeout");
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log_err(1, "writev");
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}
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if (ret != total_len)
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log_errx(1, "short write");
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}
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void
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pdu_delete(struct pdu *pdu)
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{
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free(pdu->pdu_data);
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free(pdu->pdu_bhs);
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free(pdu);
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}
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