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freebsd/sbin/hastd/proto.c
Pawel Jakub Dawidek b938cdcc9b Constify arguments we can constify.
MFC after:	2 weeks
Obtained from:	Wheel Systems Sp. z o.o. http://www.wheelsystems.com
2010-08-30 22:26:42 +00:00

295 lines
6.6 KiB
C

/*-
* Copyright (c) 2009-2010 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Pawel Jakub Dawidek under sponsorship from
* the FreeBSD Foundation.
*
* 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 AUTHORS 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 AUTHORS 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/queue.h>
#include <sys/socket.h>
#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include "proto.h"
#include "proto_impl.h"
#define PROTO_CONN_MAGIC 0x907041c
struct proto_conn {
int pc_magic;
struct hast_proto *pc_proto;
void *pc_ctx;
int pc_side;
#define PROTO_SIDE_CLIENT 0
#define PROTO_SIDE_SERVER_LISTEN 1
#define PROTO_SIDE_SERVER_WORK 2
};
static TAILQ_HEAD(, hast_proto) protos = TAILQ_HEAD_INITIALIZER(protos);
void
proto_register(struct hast_proto *proto, bool isdefault)
{
static bool seen_default = false;
if (!isdefault)
TAILQ_INSERT_HEAD(&protos, proto, hp_next);
else {
assert(!seen_default);
seen_default = true;
TAILQ_INSERT_TAIL(&protos, proto, hp_next);
}
}
static int
proto_common_setup(const char *addr, struct proto_conn **connp, int side)
{
struct hast_proto *proto;
struct proto_conn *conn;
void *ctx;
int ret;
assert(side == PROTO_SIDE_CLIENT || side == PROTO_SIDE_SERVER_LISTEN);
conn = malloc(sizeof(*conn));
if (conn == NULL)
return (-1);
TAILQ_FOREACH(proto, &protos, hp_next) {
if (side == PROTO_SIDE_CLIENT)
ret = proto->hp_client(addr, &ctx);
else /* if (side == PROTO_SIDE_SERVER_LISTEN) */
ret = proto->hp_server(addr, &ctx);
/*
* ret == 0 - success
* ret == -1 - addr is not for this protocol
* ret > 0 - right protocol, but an error occured
*/
if (ret >= 0)
break;
}
if (proto == NULL) {
/* Unrecognized address. */
free(conn);
errno = EINVAL;
return (-1);
}
if (ret > 0) {
/* An error occured. */
free(conn);
errno = ret;
return (-1);
}
conn->pc_proto = proto;
conn->pc_ctx = ctx;
conn->pc_side = side;
conn->pc_magic = PROTO_CONN_MAGIC;
*connp = conn;
return (0);
}
int
proto_client(const char *addr, struct proto_conn **connp)
{
return (proto_common_setup(addr, connp, PROTO_SIDE_CLIENT));
}
int
proto_connect(struct proto_conn *conn)
{
int ret;
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_side == PROTO_SIDE_CLIENT);
assert(conn->pc_proto != NULL);
ret = conn->pc_proto->hp_connect(conn->pc_ctx);
if (ret != 0) {
errno = ret;
return (-1);
}
return (0);
}
int
proto_server(const char *addr, struct proto_conn **connp)
{
return (proto_common_setup(addr, connp, PROTO_SIDE_SERVER_LISTEN));
}
int
proto_accept(struct proto_conn *conn, struct proto_conn **newconnp)
{
struct proto_conn *newconn;
int ret;
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_side == PROTO_SIDE_SERVER_LISTEN);
assert(conn->pc_proto != NULL);
newconn = malloc(sizeof(*newconn));
if (newconn == NULL)
return (-1);
ret = conn->pc_proto->hp_accept(conn->pc_ctx, &newconn->pc_ctx);
if (ret != 0) {
free(newconn);
errno = ret;
return (-1);
}
newconn->pc_proto = conn->pc_proto;
newconn->pc_side = PROTO_SIDE_SERVER_WORK;
newconn->pc_magic = PROTO_CONN_MAGIC;
*newconnp = newconn;
return (0);
}
int
proto_send(const struct proto_conn *conn, const void *data, size_t size)
{
int ret;
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
ret = conn->pc_proto->hp_send(conn->pc_ctx, data, size);
if (ret != 0) {
errno = ret;
return (-1);
}
return (0);
}
int
proto_recv(const struct proto_conn *conn, void *data, size_t size)
{
int ret;
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
ret = conn->pc_proto->hp_recv(conn->pc_ctx, data, size);
if (ret != 0) {
errno = ret;
return (-1);
}
return (0);
}
int
proto_descriptor(const struct proto_conn *conn)
{
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
return (conn->pc_proto->hp_descriptor(conn->pc_ctx));
}
bool
proto_address_match(const struct proto_conn *conn, const char *addr)
{
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
return (conn->pc_proto->hp_address_match(conn->pc_ctx, addr));
}
void
proto_local_address(const struct proto_conn *conn, char *addr, size_t size)
{
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
conn->pc_proto->hp_local_address(conn->pc_ctx, addr, size);
}
void
proto_remote_address(const struct proto_conn *conn, char *addr, size_t size)
{
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
conn->pc_proto->hp_remote_address(conn->pc_ctx, addr, size);
}
int
proto_timeout(const struct proto_conn *conn, int timeout)
{
struct timeval tv;
int fd;
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
fd = proto_descriptor(conn);
if (fd < 0)
return (-1);
tv.tv_sec = timeout;
tv.tv_usec = 0;
if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0)
return (-1);
if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0)
return (-1);
return (0);
}
void
proto_close(struct proto_conn *conn)
{
assert(conn != NULL);
assert(conn->pc_magic == PROTO_CONN_MAGIC);
assert(conn->pc_proto != NULL);
conn->pc_proto->hp_close(conn->pc_ctx);
conn->pc_magic = 0;
free(conn);
}