2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2014 Alexander Motin <mav@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/types.h>
35 #include <sys/socket.h>
37 #include <sys/endian.h>
38 #include <netinet/in.h>
39 #include <arpa/inet.h>
54 req = calloc(sizeof(struct isns_req), 1);
59 req->ir_buflen = sizeof(struct isns_hdr);
61 req->ir_buf = calloc(req->ir_buflen, 1);
62 if (req->ir_buf == NULL) {
71 isns_req_create(uint16_t func, uint16_t flags)
76 req = isns_req_alloc();
77 req->ir_usedlen = sizeof(struct isns_hdr);
78 hdr = (struct isns_hdr *)req->ir_buf;
79 be16enc(hdr->ih_version, ISNS_VERSION);
80 be16enc(hdr->ih_function, func);
81 be16enc(hdr->ih_flags, flags);
86 isns_req_free(struct isns_req *req)
94 isns_req_getspace(struct isns_req *req, uint32_t len)
99 if (req->ir_usedlen + len <= req->ir_buflen)
101 newlen = 1 << flsl(req->ir_usedlen + len);
102 newbuf = realloc(req->ir_buf, newlen);
103 if (newbuf == NULL) {
104 log_err(1, "realloc");
107 req->ir_buf = newbuf;
108 req->ir_buflen = newlen;
113 isns_req_add(struct isns_req *req, uint32_t tag, uint32_t len,
116 struct isns_tlv *tlv;
119 vlen = len + ((len & 3) ? (4 - (len & 3)) : 0);
120 isns_req_getspace(req, sizeof(*tlv) + vlen);
121 tlv = (struct isns_tlv *)&req->ir_buf[req->ir_usedlen];
122 be32enc(tlv->it_tag, tag);
123 be32enc(tlv->it_length, vlen);
124 memcpy(tlv->it_value, value, len);
126 memset(&tlv->it_value[len], 0, vlen - len);
127 req->ir_usedlen += sizeof(*tlv) + vlen;
131 isns_req_add_delim(struct isns_req *req)
134 isns_req_add(req, 0, 0, NULL);
138 isns_req_add_str(struct isns_req *req, uint32_t tag, const char *value)
141 isns_req_add(req, tag, strlen(value) + 1, value);
145 isns_req_add_32(struct isns_req *req, uint32_t tag, uint32_t value)
149 be32enc(&beval, value);
150 isns_req_add(req, tag, sizeof(value), &beval);
154 isns_req_add_addr(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
156 struct sockaddr_in *in4;
157 struct sockaddr_in6 *in6;
160 switch (ai->ai_addr->sa_family) {
162 in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
166 memcpy(&buf[12], &in4->sin_addr, sizeof(in4->sin_addr));
167 isns_req_add(req, tag, sizeof(buf), buf);
170 in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
171 isns_req_add(req, tag, sizeof(in6->sin6_addr), &in6->sin6_addr);
174 log_errx(1, "Unsupported address family %d",
175 ai->ai_addr->sa_family);
180 isns_req_add_port(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
182 struct sockaddr_in *in4;
183 struct sockaddr_in6 *in6;
186 switch (ai->ai_addr->sa_family) {
188 in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
189 be32enc(&buf, ntohs(in4->sin_port));
190 isns_req_add(req, tag, sizeof(buf), &buf);
193 in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
194 be32enc(&buf, ntohs(in6->sin6_port));
195 isns_req_add(req, tag, sizeof(buf), &buf);
198 log_errx(1, "Unsupported address family %d",
199 ai->ai_addr->sa_family);
204 isns_req_send(int s, struct isns_req *req)
206 struct isns_hdr *hdr;
209 hdr = (struct isns_hdr *)req->ir_buf;
210 be16enc(hdr->ih_length, req->ir_usedlen - sizeof(*hdr));
211 be16enc(hdr->ih_flags, be16dec(hdr->ih_flags) |
212 ISNS_FLAG_LAST | ISNS_FLAG_FIRST);
213 be16enc(hdr->ih_transaction, 0);
214 be16enc(hdr->ih_sequence, 0);
216 res = write(s, req->ir_buf, req->ir_usedlen);
217 return ((res < 0) ? -1 : 0);
221 isns_req_receive(int s, struct isns_req *req)
223 struct isns_hdr *hdr;
227 isns_req_getspace(req, sizeof(*hdr));
228 res = read(s, req->ir_buf, sizeof(*hdr));
229 if (res < (ssize_t)sizeof(*hdr))
231 req->ir_usedlen = sizeof(*hdr);
232 hdr = (struct isns_hdr *)req->ir_buf;
233 if (be16dec(hdr->ih_version) != ISNS_VERSION)
235 if ((be16dec(hdr->ih_flags) & (ISNS_FLAG_LAST | ISNS_FLAG_FIRST)) !=
236 (ISNS_FLAG_LAST | ISNS_FLAG_FIRST))
238 len = be16dec(hdr->ih_length);
239 isns_req_getspace(req, len);
240 res = read(s, &req->ir_buf[req->ir_usedlen], len);
243 req->ir_usedlen += len;
248 isns_req_get_status(struct isns_req *req)
251 if (req->ir_usedlen < sizeof(struct isns_hdr) + 4)
253 return (be32dec(&req->ir_buf[sizeof(struct isns_hdr)]));