2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2009-2010 The FreeBSD Foundation
7 * This software was developed by Pawel Jakub Dawidek under sponsorship from
8 * the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/types.h>
33 #include <sys/queue.h>
34 #include <sys/socket.h>
43 #include "proto_impl.h"
45 #define PROTO_CONN_MAGIC 0x907041c
48 struct proto *pc_proto;
51 #define PROTO_SIDE_CLIENT 0
52 #define PROTO_SIDE_SERVER_LISTEN 1
53 #define PROTO_SIDE_SERVER_WORK 2
56 static TAILQ_HEAD(, proto) protos = TAILQ_HEAD_INITIALIZER(protos);
59 proto_register(struct proto *proto, bool isdefault)
61 static bool seen_default = false;
64 TAILQ_INSERT_HEAD(&protos, proto, prt_next);
66 PJDLOG_ASSERT(!seen_default);
68 TAILQ_INSERT_TAIL(&protos, proto, prt_next);
72 static struct proto_conn *
73 proto_alloc(struct proto *proto, int side)
75 struct proto_conn *conn;
77 PJDLOG_ASSERT(proto != NULL);
78 PJDLOG_ASSERT(side == PROTO_SIDE_CLIENT ||
79 side == PROTO_SIDE_SERVER_LISTEN ||
80 side == PROTO_SIDE_SERVER_WORK);
82 conn = malloc(sizeof(*conn));
84 conn->pc_proto = proto;
86 conn->pc_magic = PROTO_CONN_MAGIC;
92 proto_free(struct proto_conn *conn)
95 PJDLOG_ASSERT(conn != NULL);
96 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
97 PJDLOG_ASSERT(conn->pc_side == PROTO_SIDE_CLIENT ||
98 conn->pc_side == PROTO_SIDE_SERVER_LISTEN ||
99 conn->pc_side == PROTO_SIDE_SERVER_WORK);
100 PJDLOG_ASSERT(conn->pc_proto != NULL);
102 bzero(conn, sizeof(*conn));
107 proto_common_setup(const char *srcaddr, const char *dstaddr,
108 struct proto_conn **connp, int side)
111 struct proto_conn *conn;
115 PJDLOG_ASSERT(side == PROTO_SIDE_CLIENT ||
116 side == PROTO_SIDE_SERVER_LISTEN);
118 TAILQ_FOREACH(proto, &protos, prt_next) {
119 if (side == PROTO_SIDE_CLIENT) {
120 if (proto->prt_client == NULL)
123 ret = proto->prt_client(srcaddr, dstaddr, &ctx);
124 } else /* if (side == PROTO_SIDE_SERVER_LISTEN) */ {
125 if (proto->prt_server == NULL)
128 ret = proto->prt_server(dstaddr, &ctx);
132 * ret == -1 - dstaddr is not for this protocol
133 * ret > 0 - right protocol, but an error occurred
139 /* Unrecognized address. */
144 /* An error occurred. */
148 conn = proto_alloc(proto, side);
150 if (proto->prt_close != NULL)
151 proto->prt_close(ctx);
162 proto_client(const char *srcaddr, const char *dstaddr,
163 struct proto_conn **connp)
166 return (proto_common_setup(srcaddr, dstaddr, connp, PROTO_SIDE_CLIENT));
170 proto_connect(struct proto_conn *conn, int timeout)
174 PJDLOG_ASSERT(conn != NULL);
175 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
176 PJDLOG_ASSERT(conn->pc_side == PROTO_SIDE_CLIENT);
177 PJDLOG_ASSERT(conn->pc_proto != NULL);
178 PJDLOG_ASSERT(conn->pc_proto->prt_connect != NULL);
179 PJDLOG_ASSERT(timeout >= -1);
181 ret = conn->pc_proto->prt_connect(conn->pc_ctx, timeout);
191 proto_connect_wait(struct proto_conn *conn, int timeout)
195 PJDLOG_ASSERT(conn != NULL);
196 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
197 PJDLOG_ASSERT(conn->pc_side == PROTO_SIDE_CLIENT);
198 PJDLOG_ASSERT(conn->pc_proto != NULL);
199 PJDLOG_ASSERT(conn->pc_proto->prt_connect_wait != NULL);
200 PJDLOG_ASSERT(timeout >= 0);
202 ret = conn->pc_proto->prt_connect_wait(conn->pc_ctx, timeout);
212 proto_server(const char *addr, struct proto_conn **connp)
215 return (proto_common_setup(NULL, addr, connp, PROTO_SIDE_SERVER_LISTEN));
219 proto_accept(struct proto_conn *conn, struct proto_conn **newconnp)
221 struct proto_conn *newconn;
224 PJDLOG_ASSERT(conn != NULL);
225 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
226 PJDLOG_ASSERT(conn->pc_side == PROTO_SIDE_SERVER_LISTEN);
227 PJDLOG_ASSERT(conn->pc_proto != NULL);
228 PJDLOG_ASSERT(conn->pc_proto->prt_accept != NULL);
230 newconn = proto_alloc(conn->pc_proto, PROTO_SIDE_SERVER_WORK);
234 ret = conn->pc_proto->prt_accept(conn->pc_ctx, &newconn->pc_ctx);
247 proto_send(const struct proto_conn *conn, const void *data, size_t size)
251 PJDLOG_ASSERT(conn != NULL);
252 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
253 PJDLOG_ASSERT(conn->pc_proto != NULL);
254 PJDLOG_ASSERT(conn->pc_proto->prt_send != NULL);
256 ret = conn->pc_proto->prt_send(conn->pc_ctx, data, size, -1);
265 proto_recv(const struct proto_conn *conn, void *data, size_t size)
269 PJDLOG_ASSERT(conn != NULL);
270 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
271 PJDLOG_ASSERT(conn->pc_proto != NULL);
272 PJDLOG_ASSERT(conn->pc_proto->prt_recv != NULL);
274 ret = conn->pc_proto->prt_recv(conn->pc_ctx, data, size, NULL);
283 proto_connection_send(const struct proto_conn *conn, struct proto_conn *mconn)
285 const char *protoname;
288 PJDLOG_ASSERT(conn != NULL);
289 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
290 PJDLOG_ASSERT(conn->pc_proto != NULL);
291 PJDLOG_ASSERT(conn->pc_proto->prt_send != NULL);
292 PJDLOG_ASSERT(mconn != NULL);
293 PJDLOG_ASSERT(mconn->pc_magic == PROTO_CONN_MAGIC);
294 PJDLOG_ASSERT(mconn->pc_proto != NULL);
295 fd = proto_descriptor(mconn);
296 PJDLOG_ASSERT(fd >= 0);
297 protoname = mconn->pc_proto->prt_name;
298 PJDLOG_ASSERT(protoname != NULL);
300 ret = conn->pc_proto->prt_send(conn->pc_ctx,
301 (const unsigned char *)protoname, strlen(protoname) + 1, fd);
311 proto_connection_recv(const struct proto_conn *conn, bool client,
312 struct proto_conn **newconnp)
316 struct proto_conn *newconn;
319 PJDLOG_ASSERT(conn != NULL);
320 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
321 PJDLOG_ASSERT(conn->pc_proto != NULL);
322 PJDLOG_ASSERT(conn->pc_proto->prt_recv != NULL);
323 PJDLOG_ASSERT(newconnp != NULL);
325 bzero(protoname, sizeof(protoname));
327 ret = conn->pc_proto->prt_recv(conn->pc_ctx, (unsigned char *)protoname,
328 sizeof(protoname) - 1, &fd);
334 PJDLOG_ASSERT(fd >= 0);
336 TAILQ_FOREACH(proto, &protos, prt_next) {
337 if (strcmp(proto->prt_name, protoname) == 0)
345 newconn = proto_alloc(proto,
346 client ? PROTO_SIDE_CLIENT : PROTO_SIDE_SERVER_WORK);
349 PJDLOG_ASSERT(newconn->pc_proto->prt_wrap != NULL);
350 ret = newconn->pc_proto->prt_wrap(fd, client, &newconn->pc_ctx);
363 proto_descriptor(const struct proto_conn *conn)
366 PJDLOG_ASSERT(conn != NULL);
367 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
368 PJDLOG_ASSERT(conn->pc_proto != NULL);
369 PJDLOG_ASSERT(conn->pc_proto->prt_descriptor != NULL);
371 return (conn->pc_proto->prt_descriptor(conn->pc_ctx));
375 proto_address_match(const struct proto_conn *conn, const char *addr)
378 PJDLOG_ASSERT(conn != NULL);
379 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
380 PJDLOG_ASSERT(conn->pc_proto != NULL);
381 PJDLOG_ASSERT(conn->pc_proto->prt_address_match != NULL);
383 return (conn->pc_proto->prt_address_match(conn->pc_ctx, addr));
387 proto_local_address(const struct proto_conn *conn, char *addr, size_t size)
390 PJDLOG_ASSERT(conn != NULL);
391 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
392 PJDLOG_ASSERT(conn->pc_proto != NULL);
393 PJDLOG_ASSERT(conn->pc_proto->prt_local_address != NULL);
395 conn->pc_proto->prt_local_address(conn->pc_ctx, addr, size);
399 proto_remote_address(const struct proto_conn *conn, char *addr, size_t size)
402 PJDLOG_ASSERT(conn != NULL);
403 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
404 PJDLOG_ASSERT(conn->pc_proto != NULL);
405 PJDLOG_ASSERT(conn->pc_proto->prt_remote_address != NULL);
407 conn->pc_proto->prt_remote_address(conn->pc_ctx, addr, size);
411 proto_timeout(const struct proto_conn *conn, int timeout)
416 PJDLOG_ASSERT(conn != NULL);
417 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
418 PJDLOG_ASSERT(conn->pc_proto != NULL);
420 fd = proto_descriptor(conn);
426 if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) == -1)
428 if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1)
435 proto_close(struct proto_conn *conn)
438 PJDLOG_ASSERT(conn != NULL);
439 PJDLOG_ASSERT(conn->pc_magic == PROTO_CONN_MAGIC);
440 PJDLOG_ASSERT(conn->pc_proto != NULL);
441 PJDLOG_ASSERT(conn->pc_proto->prt_close != NULL);
443 conn->pc_proto->prt_close(conn->pc_ctx);