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: }
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