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Annotation of OpenXM/src/ox_socket/ox_getport.c, Revision 1.1

1.1     ! maekawa     1: /*-
        !             2:  * Copyright (c) 2000 MAEKAWA Masahide <maekawa@math.sci.kobe-u.ac.jp>
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  *
        !            14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            15:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            16:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            17:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            18:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            19:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            20:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            21:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            22:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            23:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            24:  * SUCH DAMAGE.
        !            25:  *
        !            26:  *     $Maekawa: ox_getport.c,v 1.17 2000/11/21 13:38:51 maekawa Exp $
        !            27:  */
        !            28:
        !            29: #include <sys/types.h>
        !            30: #include <sys/socket.h>
        !            31:
        !            32: #include <netinet/in.h>
        !            33:
        !            34: #include <stdio.h>
        !            35: #include <unistd.h>
        !            36: #include <err.h>
        !            37: #include <netdb.h>
        !            38:
        !            39: #include "ox_socket.h"
        !            40:
        !            41: #ifndef INET6
        !            42: /* Derived from RFC2553 */
        !            43: #define        _SS_MAXSIZE     128
        !            44: #define        _SS_ALIGNSIZE   (sizeof(int64_t))
        !            45: #define        _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(sa_family_t))
        !            46: #define        _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(sa_family_t)
        !            47:                         + _SS_PAD1SIZE + _SS_ALIGNSIZE)
        !            48:
        !            49: struct sockaddr_storage {
        !            50:        sa_family_t     __ss_family;
        !            51:
        !            52:        char            __ss_pad1[_SS_PAD1SIZE];
        !            53:        int64_t         __ss_align;
        !            54:        char            __ss_pad2[_SS_PAD2SIZE];
        !            55: };
        !            56: #endif /* INET6 */
        !            57:
        !            58: int
        !            59: ox_getport(int sock)
        !            60: {
        !            61:        struct sockaddr_storage ss;
        !            62:        int port;
        !            63:
        !            64:        if (getsockname(sock, (struct sockaddr *)&ss, NULL) < 0) {
        !            65:                warn("ox_getport(): getsockname");
        !            66:                return (-1);
        !            67:        }
        !            68:
        !            69:        switch (ss.__ss_family) {
        !            70:        case AF_INET:
        !            71:        {
        !            72:                struct sockaddr_in *sin;
        !            73:
        !            74:                sin = (struct sockaddr_in *)&ss;
        !            75:                port = ntohs(sin->sin_port);
        !            76:
        !            77:                break;
        !            78:        }
        !            79: #ifdef INET6
        !            80:        case AF_INET6:
        !            81:        {
        !            82:                struct sockaddr_in6 *sin6;
        !            83:
        !            84:                sin6 = (struct sockaddr_in6 *)&ss;
        !            85:                port = ntohs(sin6->sin6_port);
        !            86:
        !            87:                break;
        !            88:        }
        !            89: #endif /* INET6 */
        !            90:        default:
        !            91:                /* not supported */
        !            92:                port = -1;
        !            93:        }
        !            94:
        !            95:        return (port);
        !            96: }