proto.c revision 204076
11590Srgrimes/*- 21590Srgrimes * Copyright (c) 2009-2010 The FreeBSD Foundation 31590Srgrimes * All rights reserved. 41590Srgrimes * 51590Srgrimes * This software was developed by Pawel Jakub Dawidek under sponsorship from 61590Srgrimes * the FreeBSD Foundation. 71590Srgrimes * 81590Srgrimes * Redistribution and use in source and binary forms, with or without 91590Srgrimes * modification, are permitted provided that the following conditions 101590Srgrimes * are met: 111590Srgrimes * 1. Redistributions of source code must retain the above copyright 121590Srgrimes * notice, this list of conditions and the following disclaimer. 131590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141590Srgrimes * notice, this list of conditions and the following disclaimer in the 151590Srgrimes * documentation and/or other materials provided with the distribution. 161590Srgrimes * 171590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 181590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 211590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271590Srgrimes * SUCH DAMAGE. 281590Srgrimes */ 291590Srgrimes 301590Srgrimes#include <sys/cdefs.h> 311590Srgrimes__FBSDID("$FreeBSD: head/sbin/hastd/proto.c 204076 2010-02-18 23:16:19Z pjd $"); 321590Srgrimes 331590Srgrimes#include <sys/queue.h> 341590Srgrimes 3527919Scharnier#include <assert.h> 361590Srgrimes#include <errno.h> 371590Srgrimes#include <stdint.h> 381590Srgrimes 391590Srgrimes#include "proto.h" 401590Srgrimes#include "proto_impl.h" 4129922Smarkm 4227919Scharnier#define PROTO_CONN_MAGIC 0x907041c 4350477Speterstruct proto_conn { 441590Srgrimes int pc_magic; 451590Srgrimes struct hast_proto *pc_proto; 461590Srgrimes void *pc_ctx; 471590Srgrimes int pc_side; 481590Srgrimes#define PROTO_SIDE_CLIENT 0 491590Srgrimes#define PROTO_SIDE_SERVER_LISTEN 1 501590Srgrimes#define PROTO_SIDE_SERVER_WORK 2 511590Srgrimes}; 521590Srgrimes 531590Srgrimesstatic LIST_HEAD(, hast_proto) protos = LIST_HEAD_INITIALIZER(protos); 541590Srgrimes 551590Srgrimesvoid 561590Srgrimesproto_register(struct hast_proto *proto) 571590Srgrimes{ 588232Sdg 591590Srgrimes LIST_INSERT_HEAD(&protos, proto, hp_next); 6027919Scharnier} 611590Srgrimes 621590Srgrimesstatic int 6340103Smarkmproto_common_setup(const char *addr, struct proto_conn **connp, int side) 641590Srgrimes{ 651590Srgrimes struct hast_proto *proto; 661590Srgrimes struct proto_conn *conn; 671590Srgrimes void *ctx; 681590Srgrimes int ret; 691590Srgrimes 701590Srgrimes assert(side == PROTO_SIDE_CLIENT || side == PROTO_SIDE_SERVER_LISTEN); 711590Srgrimes 721590Srgrimes conn = malloc(sizeof(*conn)); 7329922Smarkm if (conn == NULL) 741590Srgrimes return (-1); 751590Srgrimes 7657450Smarkm LIST_FOREACH(proto, &protos, hp_next) { 7729922Smarkm if (side == PROTO_SIDE_CLIENT) 781590Srgrimes ret = proto->hp_client(addr, &ctx); 7934897Smarkm else /* if (side == PROTO_SIDE_SERVER_LISTEN) */ 801590Srgrimes ret = proto->hp_server(addr, &ctx); 811590Srgrimes /* 821590Srgrimes * ret == 0 - success 831590Srgrimes * ret == -1 - addr is not for this protocol 841590Srgrimes * ret > 0 - right protocol, but an error occured 851590Srgrimes */ 861590Srgrimes if (ret >= 0) 871590Srgrimes break; 881590Srgrimes } 891590Srgrimes if (proto == NULL) { 901590Srgrimes /* Unrecognized address. */ 911590Srgrimes free(conn); 921590Srgrimes errno = EINVAL; 931590Srgrimes return (-1); 941590Srgrimes } 951590Srgrimes if (ret > 0) { 961590Srgrimes /* An error occured. */ 971590Srgrimes free(conn); 9857232Sshin errno = ret; 991590Srgrimes return (-1); 1001590Srgrimes } 1011590Srgrimes conn->pc_proto = proto; 1021590Srgrimes conn->pc_ctx = ctx; 1031590Srgrimes conn->pc_side = side; 1041590Srgrimes conn->pc_magic = PROTO_CONN_MAGIC; 1059881Sache *connp = conn; 10617284Spst return (0); 1071590Srgrimes} 1081590Srgrimes 1091590Srgrimesint 1101590Srgrimesproto_client(const char *addr, struct proto_conn **connp) 1111590Srgrimes{ 1121590Srgrimes 1131590Srgrimes return (proto_common_setup(addr, connp, PROTO_SIDE_CLIENT)); 1141590Srgrimes} 1151590Srgrimes 1161590Srgrimesint 1171590Srgrimesproto_connect(struct proto_conn *conn) 1181590Srgrimes{ 11992921Simp int ret; 12092921Simp 12192921Simp assert(conn != NULL); 12292921Simp assert(conn->pc_magic == PROTO_CONN_MAGIC); 12392921Simp assert(conn->pc_side == PROTO_SIDE_CLIENT); 12492921Simp assert(conn->pc_proto != NULL); 12592921Simp 12692921Simp ret = conn->pc_proto->hp_connect(conn->pc_ctx); 12792921Simp if (ret != 0) { 12892921Simp errno = ret; 12992921Simp return (-1); 13092921Simp } 13192921Simp 13292921Simp return (0); 13392921Simp} 13492921Simp 13592921Simpint 13692921Simpproto_server(const char *addr, struct proto_conn **connp) 1371590Srgrimes{ 1381590Srgrimes 13992921Simp return (proto_common_setup(addr, connp, PROTO_SIDE_SERVER_LISTEN)); 1401590Srgrimes} 1411590Srgrimes 1421590Srgrimesint 1431590Srgrimesproto_accept(struct proto_conn *conn, struct proto_conn **newconnp) 1441590Srgrimes{ 1451590Srgrimes struct proto_conn *newconn; 1461590Srgrimes int ret; 1471590Srgrimes 1481590Srgrimes assert(conn != NULL); 1491590Srgrimes assert(conn->pc_magic == PROTO_CONN_MAGIC); 1501590Srgrimes assert(conn->pc_side == PROTO_SIDE_SERVER_LISTEN); 1518232Sdg assert(conn->pc_proto != NULL); 15247549Sbde 15340103Smarkm newconn = malloc(sizeof(*newconn)); 15440103Smarkm if (newconn == NULL) 15540103Smarkm return (-1); 15656590Sshin 15756590Sshin ret = conn->pc_proto->hp_accept(conn->pc_ctx, &newconn->pc_ctx); 1581590Srgrimes if (ret != 0) { 1598232Sdg free(newconn); 1601590Srgrimes errno = ret; 16147549Sbde return (-1); 1621590Srgrimes } 16329922Smarkm 1641590Srgrimes newconn->pc_proto = conn->pc_proto; 1651590Srgrimes newconn->pc_side = PROTO_SIDE_SERVER_WORK; 1661590Srgrimes newconn->pc_magic = PROTO_CONN_MAGIC; 1671590Srgrimes *newconnp = newconn; 1681590Srgrimes 1691590Srgrimes return (0); 1701590Srgrimes} 1711590Srgrimes 1721590Srgrimesint 1731590Srgrimesproto_send(struct proto_conn *conn, const void *data, size_t size) 1741590Srgrimes{ 1751590Srgrimes int ret; 1761590Srgrimes 1771590Srgrimes assert(conn != NULL); 17857232Sshin assert(conn->pc_magic == PROTO_CONN_MAGIC); 1791590Srgrimes assert(conn->pc_proto != NULL); 18057232Sshin 1811590Srgrimes ret = conn->pc_proto->hp_send(conn->pc_ctx, data, size); 18224360Simp if (ret != 0) { 1831590Srgrimes errno = ret; 18457232Sshin return (-1); 18557232Sshin } 18657232Sshin return (0); 18757232Sshin} 18857232Sshin 18957232Sshinint 19057232Sshinproto_recv(struct proto_conn *conn, void *data, size_t size) 19157232Sshin{ 1921590Srgrimes int ret; 1931590Srgrimes 1941590Srgrimes assert(conn != NULL); 1958232Sdg assert(conn->pc_magic == PROTO_CONN_MAGIC); 1968232Sdg assert(conn->pc_proto != NULL); 1978232Sdg 1981590Srgrimes ret = conn->pc_proto->hp_recv(conn->pc_ctx, data, size); 1991590Srgrimes if (ret != 0) { 2001590Srgrimes errno = ret; 2011590Srgrimes return (-1); 2021590Srgrimes } 2031590Srgrimes return (0); 2041590Srgrimes} 2051590Srgrimes 2061590Srgrimesint 2071590Srgrimesproto_descriptor(const struct proto_conn *conn) 2081590Srgrimes{ 2091590Srgrimes 2101590Srgrimes assert(conn != NULL); 2111590Srgrimes assert(conn->pc_magic == PROTO_CONN_MAGIC); 2121590Srgrimes assert(conn->pc_proto != NULL); 2131590Srgrimes 2141590Srgrimes return (conn->pc_proto->hp_descriptor(conn->pc_ctx)); 2151590Srgrimes} 21647488Speter 21747549Sbdebool 21847549Sbdeproto_address_match(const struct proto_conn *conn, const char *addr) 21947488Speter{ 22047488Speter 2211590Srgrimes assert(conn != NULL); 2221590Srgrimes assert(conn->pc_magic == PROTO_CONN_MAGIC); 2231590Srgrimes assert(conn->pc_proto != NULL); 2241590Srgrimes 2251590Srgrimes return (conn->pc_proto->hp_address_match(conn->pc_ctx, addr)); 2261590Srgrimes} 2271590Srgrimes 2281590Srgrimesvoid 2291590Srgrimesproto_local_address(const struct proto_conn *conn, char *addr, size_t size) 2301590Srgrimes{ 2311590Srgrimes 2321590Srgrimes assert(conn != NULL); 2331590Srgrimes assert(conn->pc_magic == PROTO_CONN_MAGIC); 2341590Srgrimes assert(conn->pc_proto != NULL); 2351590Srgrimes 2361590Srgrimes conn->pc_proto->hp_local_address(conn->pc_ctx, addr, size); 2371590Srgrimes} 2381590Srgrimes 2391590Srgrimesvoid 2401590Srgrimesproto_remote_address(const struct proto_conn *conn, char *addr, size_t size) 2411590Srgrimes{ 2421590Srgrimes 2431590Srgrimes assert(conn != NULL); 24434897Smarkm assert(conn->pc_magic == PROTO_CONN_MAGIC); 2451590Srgrimes assert(conn->pc_proto != NULL); 2461590Srgrimes 24734897Smarkm conn->pc_proto->hp_remote_address(conn->pc_ctx, addr, size); 2481590Srgrimes} 2491590Srgrimes 25027919Scharniervoid 25127919Scharnierproto_close(struct proto_conn *conn) 2521590Srgrimes{ 2531590Srgrimes 25447488Speter assert(conn != NULL); 25547488Speter assert(conn->pc_magic == PROTO_CONN_MAGIC); 2561590Srgrimes assert(conn->pc_proto != NULL); 2571590Srgrimes 2581590Srgrimes conn->pc_proto->hp_close(conn->pc_ctx); 25940103Smarkm conn->pc_magic = 0; 26040103Smarkm free(conn); 26140103Smarkm} 2621590Srgrimes