2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009-2010 The FreeBSD Foundation
5 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
8 * This software was developed by Pawel Jakub Dawidek under sponsorship from
9 * the FreeBSD Foundation.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/endian.h>
48 #include "hast_checksum.h"
50 #include "hast_compression.h"
51 #include "hast_proto.h"
53 struct hast_main_header {
54 /* Protocol version. */
56 /* Size of nv headers. */
60 typedef int hps_send_t(const struct hast_resource *, struct nv *nv, void **,
62 typedef int hps_recv_t(const struct hast_resource *, struct nv *nv, void **,
65 struct hast_pipe_stage {
71 static struct hast_pipe_stage pipeline[] = {
72 { "compression", compression_send, compression_recv },
74 { "checksum", checksum_send, checksum_recv }
79 * Send the given nv structure via conn.
80 * We keep headers in nv structure and pass data in separate argument.
81 * There can be no data at all (data is NULL then).
84 hast_proto_send(const struct hast_resource *res, struct proto_conn *conn,
85 struct nv *nv, const void *data, size_t size)
87 struct hast_main_header hdr;
94 dptr = (void *)(uintptr_t)data;
101 for (ii = 0; ii < sizeof(pipeline) / sizeof(pipeline[0]);
103 (void)pipeline[ii].hps_send(res, nv, &dptr, &size,
106 nv_add_uint32(nv, size, "size");
107 if (nv_error(nv) != 0) {
108 errno = nv_error(nv);
117 hdr.version = res != NULL ? res->hr_version : HAST_PROTO_VERSION;
118 hdr.size = htole32((uint32_t)ebuf_size(eb));
119 if (ebuf_add_head(eb, &hdr, sizeof(hdr)) == -1)
122 hptr = ebuf_data(eb, &hsize);
123 if (proto_send(conn, hptr, hsize) == -1)
125 if (data != NULL && proto_send(conn, dptr, size) == -1)
136 hast_proto_recv_hdr(const struct proto_conn *conn, struct nv **nvp)
138 struct hast_main_header hdr;
146 if (proto_recv(conn, &hdr, sizeof(hdr)) == -1)
149 if (hdr.version > HAST_PROTO_VERSION) {
150 errno = ERPCMISMATCH;
154 hdr.size = le32toh(hdr.size);
156 eb = ebuf_alloc(hdr.size);
159 if (ebuf_add_tail(eb, NULL, hdr.size) == -1)
161 hptr = ebuf_data(eb, NULL);
162 PJDLOG_ASSERT(hptr != NULL);
163 if (proto_recv(conn, hptr, hdr.size) == -1)
178 hast_proto_recv_data(const struct hast_resource *res, struct proto_conn *conn,
179 struct nv *nv, void *data, size_t size)
187 PJDLOG_ASSERT(data != NULL);
188 PJDLOG_ASSERT(size > 0);
194 dsize = nv_get_uint32(nv, "size");
198 } else if (dsize == 0) {
199 (void)nv_set_error(nv, 0);
201 if (proto_recv(conn, data, dsize) == -1)
203 for (ii = sizeof(pipeline) / sizeof(pipeline[0]); ii > 0;
205 ret = pipeline[ii - 1].hps_recv(res, nv, &dptr,
216 bcopy(dptr, data, dsize);