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