253 lines
6.2 KiB
C
253 lines
6.2 KiB
C
/*-
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* Copyright (c) 2014 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <sys/endian.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "ctld.h"
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#include "isns.h"
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struct isns_req *
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isns_req_alloc(void)
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{
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struct isns_req *req;
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req = calloc(sizeof(struct isns_req), 1);
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if (req == NULL) {
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log_err(1, "calloc");
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return (NULL);
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}
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req->ir_buflen = sizeof(struct isns_hdr);
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req->ir_usedlen = 0;
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req->ir_buf = calloc(req->ir_buflen, 1);
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if (req->ir_buf == NULL) {
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free(req);
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log_err(1, "calloc");
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return (NULL);
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}
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return (req);
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}
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struct isns_req *
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isns_req_create(uint16_t func, uint16_t flags)
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{
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struct isns_req *req;
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struct isns_hdr *hdr;
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req = isns_req_alloc();
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req->ir_usedlen = sizeof(struct isns_hdr);
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hdr = (struct isns_hdr *)req->ir_buf;
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be16enc(hdr->ih_version, ISNS_VERSION);
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be16enc(hdr->ih_function, func);
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be16enc(hdr->ih_flags, flags);
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return (req);
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}
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void
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isns_req_free(struct isns_req *req)
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{
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free(req->ir_buf);
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free(req);
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}
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static int
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isns_req_getspace(struct isns_req *req, uint32_t len)
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{
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void *newbuf;
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int newlen;
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if (req->ir_usedlen + len <= req->ir_buflen)
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return (0);
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newlen = 1 << flsl(req->ir_usedlen + len);
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newbuf = realloc(req->ir_buf, newlen);
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if (newbuf == NULL) {
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log_err(1, "realloc");
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return (1);
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}
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req->ir_buf = newbuf;
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req->ir_buflen = newlen;
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return (0);
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}
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void
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isns_req_add(struct isns_req *req, uint32_t tag, uint32_t len,
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const void *value)
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{
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struct isns_tlv *tlv;
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uint32_t vlen;
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vlen = len + ((len & 3) ? (4 - (len & 3)) : 0);
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isns_req_getspace(req, sizeof(*tlv) + vlen);
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tlv = (struct isns_tlv *)&req->ir_buf[req->ir_usedlen];
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be32enc(tlv->it_tag, tag);
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be32enc(tlv->it_length, vlen);
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memcpy(tlv->it_value, value, len);
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if (vlen != len)
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memset(&tlv->it_value[len], 0, vlen - len);
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req->ir_usedlen += sizeof(*tlv) + vlen;
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}
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void
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isns_req_add_delim(struct isns_req *req)
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{
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isns_req_add(req, 0, 0, NULL);
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}
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void
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isns_req_add_str(struct isns_req *req, uint32_t tag, const char *value)
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{
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isns_req_add(req, tag, strlen(value) + 1, value);
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}
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void
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isns_req_add_32(struct isns_req *req, uint32_t tag, uint32_t value)
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{
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uint32_t beval;
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be32enc(&beval, value);
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isns_req_add(req, tag, sizeof(value), &beval);
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}
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void
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isns_req_add_addr(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
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{
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struct sockaddr_in *in4;
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struct sockaddr_in6 *in6;
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uint8_t buf[16];
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switch (ai->ai_addr->sa_family) {
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case AF_INET:
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in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
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memset(buf, 0, 10);
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buf[10] = 0xff;
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buf[11] = 0xff;
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memcpy(&buf[12], &in4->sin_addr, sizeof(in4->sin_addr));
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isns_req_add(req, tag, sizeof(buf), buf);
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break;
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case AF_INET6:
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in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
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isns_req_add(req, tag, sizeof(in6->sin6_addr), &in6->sin6_addr);
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break;
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default:
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log_errx(1, "Unsupported address family %d",
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ai->ai_addr->sa_family);
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}
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}
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void
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isns_req_add_port(struct isns_req *req, uint32_t tag, struct addrinfo *ai)
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{
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struct sockaddr_in *in4;
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struct sockaddr_in6 *in6;
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uint32_t buf;
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switch (ai->ai_addr->sa_family) {
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case AF_INET:
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in4 = (struct sockaddr_in *)(void *)ai->ai_addr;
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be32enc(&buf, ntohs(in4->sin_port));
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isns_req_add(req, tag, sizeof(buf), &buf);
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break;
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case AF_INET6:
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in6 = (struct sockaddr_in6 *)(void *)ai->ai_addr;
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be32enc(&buf, ntohs(in6->sin6_port));
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isns_req_add(req, tag, sizeof(buf), &buf);
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break;
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default:
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log_errx(1, "Unsupported address family %d",
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ai->ai_addr->sa_family);
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}
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}
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int
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isns_req_send(int s, struct isns_req *req)
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{
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struct isns_hdr *hdr;
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int res;
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hdr = (struct isns_hdr *)req->ir_buf;
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be16enc(hdr->ih_length, req->ir_usedlen - sizeof(*hdr));
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be16enc(hdr->ih_flags, be16dec(hdr->ih_flags) |
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ISNS_FLAG_LAST | ISNS_FLAG_FIRST);
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be16enc(hdr->ih_transaction, 0);
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be16enc(hdr->ih_sequence, 0);
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res = write(s, req->ir_buf, req->ir_usedlen);
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return ((res < 0) ? -1 : 0);
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}
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int
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isns_req_receive(int s, struct isns_req *req)
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{
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struct isns_hdr *hdr;
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ssize_t res, len;
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req->ir_usedlen = 0;
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isns_req_getspace(req, sizeof(*hdr));
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res = read(s, req->ir_buf, sizeof(*hdr));
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if (res < (ssize_t)sizeof(*hdr))
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return (-1);
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req->ir_usedlen = sizeof(*hdr);
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hdr = (struct isns_hdr *)req->ir_buf;
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if (be16dec(hdr->ih_version) != ISNS_VERSION)
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return (-1);
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if ((be16dec(hdr->ih_flags) & (ISNS_FLAG_LAST | ISNS_FLAG_FIRST)) !=
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(ISNS_FLAG_LAST | ISNS_FLAG_FIRST))
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return (-1);
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len = be16dec(hdr->ih_length);
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isns_req_getspace(req, len);
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res = read(s, &req->ir_buf[req->ir_usedlen], len);
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if (res < len)
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return (-1);
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req->ir_usedlen += len;
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return (0);
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}
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uint32_t
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isns_req_get_status(struct isns_req *req)
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{
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if (req->ir_usedlen < sizeof(struct isns_hdr) + 4)
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return (-1);
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return (be32dec(&req->ir_buf[sizeof(struct isns_hdr)]));
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}
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