2 * Copyright (c) 2014 Alexander Motin <mav@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
33 #include <sys/socket.h>
35 #include <sys/endian.h>
36 #include <netinet/in.h>
37 #include <arpa/inet.h>
58 req = calloc(sizeof(struct isns_req), 1);
63 req->ir_buflen = sizeof(struct isns_hdr);
65 req->ir_buf = calloc(req->ir_buflen, 1);
66 if (req->ir_buf == NULL) {
75 isns_req_create(uint16_t func, uint16_t flags)
80 req = isns_req_alloc();
81 req->ir_usedlen = sizeof(struct isns_hdr);
82 hdr = (struct isns_hdr *)req->ir_buf;
83 be16enc(hdr->ih_version, ISNS_VERSION);
84 be16enc(hdr->ih_function, func);
85 be16enc(hdr->ih_flags, flags);
90 isns_req_free(struct isns_req *req)
98 isns_req_getspace(struct isns_req *req, uint32_t len)
103 if (req->ir_usedlen + len <= req->ir_buflen)
105 newlen = 1 << flsl(req->ir_usedlen + len);
106 newbuf = realloc(req->ir_buf, newlen);
107 if (newbuf == NULL) {
108 log_err(1, "realloc");
111 req->ir_buf = newbuf;
112 req->ir_buflen = newlen;
117 isns_req_add(struct isns_req *req, uint32_t tag, uint32_t len,
120 struct isns_tlv *tlv;
123 vlen = len + ((len & 3) ? (4 - (len & 3)) : 0);
124 isns_req_getspace(req, sizeof(*tlv) + vlen);
125 tlv = (struct isns_tlv *)&req->ir_buf[req->ir_usedlen];
126 be32enc(tlv->it_tag, tag);
127 be32enc(tlv->it_length, vlen);
128 memcpy(tlv->it_value, value, len);
130 memset(&tlv->it_value[len], 0, vlen - len);
131 req->ir_usedlen += sizeof(*tlv) + vlen;
135 isns_req_add_delim(struct isns_req *req)
138 isns_req_add(req, 0, 0, NULL);
142 isns_req_add_str(struct isns_req *req, uint32_t tag, const char *value)
145 isns_req_add(req, tag, strlen(value) + 1, value);
149 isns_req_add_32(struct isns_req *req, uint32_t tag, uint32_t value)
153 be32enc(&beval, value);
154 isns_req_add(req, tag, sizeof(value), &beval);
158 isns_req_add_addr(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
160 struct sockaddr_in *in4;
161 struct sockaddr_in6 *in6;
164 switch (ai->ai_addr->sa_family) {
166 in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
170 memcpy(&buf[12], &in4->sin_addr, sizeof(in4->sin_addr));
171 isns_req_add(req, tag, sizeof(buf), buf);
174 in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
175 isns_req_add(req, tag, sizeof(in6->sin6_addr), &in6->sin6_addr);
178 log_errx(1, "Unsupported address family %d",
179 ai->ai_addr->sa_family);
184 isns_req_add_port(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
186 struct sockaddr_in *in4;
187 struct sockaddr_in6 *in6;
190 switch (ai->ai_addr->sa_family) {
192 in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
193 be32enc(&buf, ntohs(in4->sin_port));
194 isns_req_add(req, tag, sizeof(buf), &buf);
197 in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
198 be32enc(&buf, ntohs(in6->sin6_port));
199 isns_req_add(req, tag, sizeof(buf), &buf);
202 log_errx(1, "Unsupported address family %d",
203 ai->ai_addr->sa_family);
208 isns_req_send(int s, struct isns_req *req)
210 struct isns_hdr *hdr;
213 hdr = (struct isns_hdr *)req->ir_buf;
214 be16enc(hdr->ih_length, req->ir_usedlen - sizeof(*hdr));
215 be16enc(hdr->ih_flags, be16dec(hdr->ih_flags) |
216 ISNS_FLAG_LAST | ISNS_FLAG_FIRST);
217 be16enc(hdr->ih_transaction, 0);
218 be16enc(hdr->ih_sequence, 0);
220 res = write(s, req->ir_buf, req->ir_usedlen);
221 return ((res < 0) ? -1 : 0);
225 isns_req_receive(int s, struct isns_req *req)
227 struct isns_hdr *hdr;
231 isns_req_getspace(req, sizeof(*hdr));
232 res = read(s, req->ir_buf, sizeof(*hdr));
233 if (res < (ssize_t)sizeof(*hdr))
235 req->ir_usedlen = sizeof(*hdr);
236 hdr = (struct isns_hdr *)req->ir_buf;
237 if (be16dec(hdr->ih_version) != ISNS_VERSION)
239 if ((be16dec(hdr->ih_flags) & (ISNS_FLAG_LAST | ISNS_FLAG_FIRST)) !=
240 (ISNS_FLAG_LAST | ISNS_FLAG_FIRST))
242 len = be16dec(hdr->ih_length);
243 isns_req_getspace(req, len);
244 res = read(s, &req->ir_buf[req->ir_usedlen], len);
247 req->ir_usedlen += len;
252 isns_req_get_status(struct isns_req *req)
255 if (req->ir_usedlen < sizeof(struct isns_hdr) + 4)
257 return (be32dec(&req->ir_buf[sizeof(struct isns_hdr)]));