--- /dev/null
+/*
+ Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include "iscsi.h"
+#include "iscsi-private.h"
+
+int iscsi_discovery_async(struct iscsi_context *iscsi, iscsi_command_cb cb, void *private_data)
+{
+ struct iscsi_pdu *pdu;
+ char *str;
+
+ if (iscsi == NULL) {
+ printf("trying to send text on NULL context\n");
+ return -1;
+ }
+
+ if (iscsi->session_type != ISCSI_SESSION_DISCOVERY) {
+ printf("Trying to do discovery on non-discovery session\n");
+ return -2;
+ }
+
+ pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_TEXT_REQUEST, ISCSI_PDU_TEXT_RESPONSE);
+ if (pdu == NULL) {
+ printf("Failed to allocate text pdu\n");
+ return -3;
+ }
+
+ /* immediate */
+ iscsi_pdu_set_immediate(pdu);
+
+ /* flags */
+ iscsi_pdu_set_pduflags(pdu, ISCSI_PDU_TEXT_FINAL);
+
+ /* target transfer tag */
+ iscsi_pdu_set_ttt(pdu, 0xffffffff);
+
+ /* sendtargets */
+ str = "SendTargets=All";
+ if (iscsi_pdu_add_data(iscsi, pdu, (unsigned char *)str, strlen(str)+1) != 0) {
+ printf("pdu add data failed\n");
+ iscsi_free_pdu(iscsi, pdu);
+ return -4;
+ }
+
+ pdu->callback = cb;
+ pdu->private_data = private_data;
+
+ if (iscsi_queue_pdu(iscsi, pdu) != 0) {
+ printf("failed to queue iscsi text pdu\n");
+ iscsi_free_pdu(iscsi, pdu);
+ return -5;
+ }
+
+ return 0;
+}
+
+static void iscsi_free_discovery_addresses(struct iscsi_discovery_address *addresses)
+{
+ while (addresses != NULL) {
+ struct iscsi_discovery_address *next = addresses->next;
+
+ if (addresses->target_name != NULL) {
+ free(discard_const(addresses->target_name));
+ addresses->target_name = NULL;
+ }
+ if (addresses->target_address != NULL) {
+ free(discard_const(addresses->target_address));
+ addresses->target_address = NULL;
+ }
+ addresses->next = NULL;
+ free(addresses);
+ addresses = next;
+ }
+}
+
+int iscsi_process_text_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu, const unsigned char *hdr, int size)
+{
+ struct iscsi_discovery_address *targets = NULL;
+
+ /* verify the response looks sane */
+ if (hdr[1] != ISCSI_PDU_TEXT_FINAL) {
+ printf("unsupported flags in text reply %02x\n", hdr[1]);
+ pdu->callback(iscsi, ISCSI_STATUS_ERROR, NULL, pdu->private_data);
+ return -1;
+ }
+
+ /* skip past the header */
+ hdr += ISCSI_HEADER_SIZE;
+ size -= ISCSI_HEADER_SIZE;
+
+ while (size > 0) {
+ int len;
+
+ len = strlen((char *)hdr);
+
+ if (len == 0) {
+ break;
+ }
+
+ if (len > size) {
+ printf("len > size when parsing discovery data %d>%d\n", len, size);
+ pdu->callback(iscsi, ISCSI_STATUS_ERROR, NULL, pdu->private_data);
+ iscsi_free_discovery_addresses(targets);
+ return -1;
+ }
+
+ /* parse the strings */
+ if (!strncmp((char *)hdr, "TargetName=", 11)) {
+ struct iscsi_discovery_address *target;
+
+ target = malloc(sizeof(struct iscsi_discovery_address));
+ if (target == NULL) {
+ printf("Failed to allocate data for new discovered target\n");
+ pdu->callback(iscsi, ISCSI_STATUS_ERROR, NULL, pdu->private_data);
+ iscsi_free_discovery_addresses(targets);
+ return -1;
+ }
+ bzero(target, sizeof(struct iscsi_discovery_address));
+ target->target_name = strdup((char *)hdr+11);
+ if (target->target_name == NULL) {
+ printf("Failed to allocate data for new discovered target name\n");
+ pdu->callback(iscsi, ISCSI_STATUS_ERROR, NULL, pdu->private_data);
+ free(target);
+ target = NULL;
+ iscsi_free_discovery_addresses(targets);
+ return -1;
+ }
+ target->next = targets;
+ targets = target;
+ } else if (!strncmp((char *)hdr, "TargetAddress=", 14)) {
+ targets->target_address = strdup((char *)hdr+14);
+ if (targets->target_address == NULL) {
+ printf("Failed to allocate data for new discovered target address\n");
+ pdu->callback(iscsi, ISCSI_STATUS_ERROR, NULL, pdu->private_data);
+ iscsi_free_discovery_addresses(targets);
+ return -1;
+ }
+ } else {
+ printf("Dont know how to handle discovery string : %s\n", hdr);
+ pdu->callback(iscsi, ISCSI_STATUS_ERROR, NULL, pdu->private_data);
+ iscsi_free_discovery_addresses(targets);
+ return -1;
+ }
+
+ hdr += len + 1;
+ size -= len + 1;
+ }
+
+ pdu->callback(iscsi, ISCSI_STATUS_GOOD, targets, pdu->private_data);
+ iscsi_free_discovery_addresses(targets);
+
+ return 0;
+}
projects / ccan / blobdiff