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- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2014 Alexander Motin <mav@FreeBSD.org>
- * All rights reserved.
- *
- * 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.
- *
- */
- #include <sys/types.h>
- #include <sys/time.h>
- #include <sys/socket.h>
- #include <sys/wait.h>
- #include <sys/endian.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <netdb.h>
- #include <stdbool.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include "ctld.h"
- #include "isns.h"
- struct isns_req *
- isns_req_alloc(void)
- {
- struct isns_req *req;
- req = calloc(1, sizeof(struct isns_req));
- if (req == NULL) {
- log_err(1, "calloc");
- return (NULL);
- }
- req->ir_buflen = sizeof(struct isns_hdr);
- req->ir_usedlen = 0;
- req->ir_buf = calloc(1, req->ir_buflen);
- if (req->ir_buf == NULL) {
- free(req);
- log_err(1, "calloc");
- return (NULL);
- }
- return (req);
- }
- struct isns_req *
- isns_req_create(uint16_t func, uint16_t flags)
- {
- struct isns_req *req;
- struct isns_hdr *hdr;
- req = isns_req_alloc();
- req->ir_usedlen = sizeof(struct isns_hdr);
- hdr = (struct isns_hdr *)req->ir_buf;
- be16enc(hdr->ih_version, ISNS_VERSION);
- be16enc(hdr->ih_function, func);
- be16enc(hdr->ih_flags, flags);
- return (req);
- }
- void
- isns_req_free(struct isns_req *req)
- {
- free(req->ir_buf);
- free(req);
- }
- static int
- isns_req_getspace(struct isns_req *req, uint32_t len)
- {
- void *newbuf;
- int newlen;
- if (req->ir_usedlen + len <= req->ir_buflen)
- return (0);
- newlen = 1 << flsl(req->ir_usedlen + len);
- newbuf = realloc(req->ir_buf, newlen);
- if (newbuf == NULL) {
- log_err(1, "realloc");
- return (1);
- }
- req->ir_buf = newbuf;
- req->ir_buflen = newlen;
- return (0);
- }
- void
- isns_req_add(struct isns_req *req, uint32_t tag, uint32_t len,
- const void *value)
- {
- struct isns_tlv *tlv;
- uint32_t vlen;
- vlen = len + ((len & 3) ? (4 - (len & 3)) : 0);
- isns_req_getspace(req, sizeof(*tlv) + vlen);
- tlv = (struct isns_tlv *)&req->ir_buf[req->ir_usedlen];
- be32enc(tlv->it_tag, tag);
- be32enc(tlv->it_length, vlen);
- memcpy(tlv->it_value, value, len);
- if (vlen != len)
- memset(&tlv->it_value[len], 0, vlen - len);
- req->ir_usedlen += sizeof(*tlv) + vlen;
- }
- void
- isns_req_add_delim(struct isns_req *req)
- {
- isns_req_add(req, 0, 0, NULL);
- }
- void
- isns_req_add_str(struct isns_req *req, uint32_t tag, const char *value)
- {
- isns_req_add(req, tag, strlen(value) + 1, value);
- }
- void
- isns_req_add_32(struct isns_req *req, uint32_t tag, uint32_t value)
- {
- uint32_t beval;
- be32enc(&beval, value);
- isns_req_add(req, tag, sizeof(value), &beval);
- }
- void
- isns_req_add_addr(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
- {
- struct sockaddr_in *in4;
- struct sockaddr_in6 *in6;
- uint8_t buf[16];
- switch (ai->ai_addr->sa_family) {
- case AF_INET:
- in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
- memset(buf, 0, 10);
- buf[10] = 0xff;
- buf[11] = 0xff;
- memcpy(&buf[12], &in4->sin_addr, sizeof(in4->sin_addr));
- isns_req_add(req, tag, sizeof(buf), buf);
- break;
- case AF_INET6:
- in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
- isns_req_add(req, tag, sizeof(in6->sin6_addr), &in6->sin6_addr);
- break;
- default:
- log_errx(1, "Unsupported address family %d",
- ai->ai_addr->sa_family);
- }
- }
- void
- isns_req_add_port(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
- {
- struct sockaddr_in *in4;
- struct sockaddr_in6 *in6;
- uint32_t buf;
- switch (ai->ai_addr->sa_family) {
- case AF_INET:
- in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
- be32enc(&buf, ntohs(in4->sin_port));
- isns_req_add(req, tag, sizeof(buf), &buf);
- break;
- case AF_INET6:
- in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
- be32enc(&buf, ntohs(in6->sin6_port));
- isns_req_add(req, tag, sizeof(buf), &buf);
- break;
- default:
- log_errx(1, "Unsupported address family %d",
- ai->ai_addr->sa_family);
- }
- }
- int
- isns_req_send(int s, struct isns_req *req)
- {
- struct isns_hdr *hdr;
- int res;
- hdr = (struct isns_hdr *)req->ir_buf;
- be16enc(hdr->ih_length, req->ir_usedlen - sizeof(*hdr));
- be16enc(hdr->ih_flags, be16dec(hdr->ih_flags) |
- ISNS_FLAG_LAST | ISNS_FLAG_FIRST);
- be16enc(hdr->ih_transaction, 0);
- be16enc(hdr->ih_sequence, 0);
- res = write(s, req->ir_buf, req->ir_usedlen);
- return ((res < 0) ? -1 : 0);
- }
- int
- isns_req_receive(int s, struct isns_req *req)
- {
- struct isns_hdr *hdr;
- ssize_t res, len;
- req->ir_usedlen = 0;
- isns_req_getspace(req, sizeof(*hdr));
- res = read(s, req->ir_buf, sizeof(*hdr));
- if (res < (ssize_t)sizeof(*hdr))
- return (-1);
- req->ir_usedlen = sizeof(*hdr);
- hdr = (struct isns_hdr *)req->ir_buf;
- if (be16dec(hdr->ih_version) != ISNS_VERSION)
- return (-1);
- if ((be16dec(hdr->ih_flags) & (ISNS_FLAG_LAST | ISNS_FLAG_FIRST)) !=
- (ISNS_FLAG_LAST | ISNS_FLAG_FIRST))
- return (-1);
- len = be16dec(hdr->ih_length);
- isns_req_getspace(req, len);
- res = read(s, &req->ir_buf[req->ir_usedlen], len);
- if (res < len)
- return (-1);
- req->ir_usedlen += len;
- return (0);
- }
- uint32_t
- isns_req_get_status(struct isns_req *req)
- {
- if (req->ir_usedlen < sizeof(struct isns_hdr) + 4)
- return (-1);
- return (be32dec(&req->ir_buf[sizeof(struct isns_hdr)]));
- }
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