ssl.c

来自「The Kannel Open Source WAP and SMS gatew」· C语言 代码 · 共 98 行

/* ==================================================================== 
 * The Kannel Software License, Version 1.0 
 * 
 * Copyright (c) 2001-2004 Kannel Group  
 * Copyright (c) 1998-2001 WapIT Ltd.   
 * All rights reserved. 
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 * Redistribution and use in source and binary forms, with or without 
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 * 1. Redistributions of source code must retain the above copyright 
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 * 3. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowledgment: 
 *       "This product includes software developed by the 
 *        Kannel Group (http://www.kannel.org/)." 
 *    Alternately, this acknowledgment may appear in the software itself, 
 *    if and wherever such third-party acknowledgments normally appear. 
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 
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 * ==================================================================== 
 * 
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Kannel Group.  For more information on  
 * the Kannel Group, please see <http://www.kannel.org/>. 
 * 
 * Portions of this software are based upon software originally written at  
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 */ 

/*  
 * ssl.c - implements SSL specific routines and types 
 * 
 * This file implements the secure socket layer (SSL) specific  
 * routines and types. 
 * 
 * This product includes software developed by Ralf S. Engelschall  
 * <[e-mail]> for use in the mod_ssl project  
 * (http://www.modssl.org/). 
 * 
 * Stipe Tolj <[e-mail]>  
 * for Kannel Project and Wapme Systems AG 
 */ 
 
#include "gwlib/gwlib.h" 
 
#ifdef HAVE_LIBSSL 
  
#include <openssl/ssl.h> 
 
int SSL_smart_shutdown(SSL *ssl) 
{ 
    int i; 
    int rc; 
 
    /* 
     * Repeat the calls, because SSL_shutdown internally dispatches through a 
     * little state machine. Usually only one or two interation should be 
     * needed, so we restrict the total number of restrictions in order to 
     * avoid process hangs in case the client played bad with the socket 
     * connection and OpenSSL cannot recognize it. 
     */ 
    rc = 0; 
    for (i = 0; i < 4 /* max 2x pending + 2x data = 4 */; i++) { 
        if ((rc = SSL_shutdown(ssl))) 
            break; 
    } 
    return rc; 
} 
 
#endif /* HAVE_LIBSSL */