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-rw-r--r--usr.sbin/ctld/isns.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/usr.sbin/ctld/isns.c b/usr.sbin/ctld/isns.c
new file mode 100644
index 0000000..11eef3e0
--- /dev/null
+++ b/usr.sbin/ctld/isns.c
@@ -0,0 +1,258 @@
+/*-
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#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 <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <netdb.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdint.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(sizeof(struct isns_req), 1);
+ if (req == NULL) {
+ log_err(1, "calloc");
+ return (NULL);
+ }
+ req->ir_buflen = sizeof(struct isns_hdr);
+ req->ir_usedlen = 0;
+ req->ir_buf = calloc(req->ir_buflen, 1);
+ 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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