1 | /* apps/s_socket.c - socket-related functions used by s_client and s_server */ |
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2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 | * All rights reserved. |
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4 | * |
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5 | * This package is an SSL implementation written |
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6 | * by Eric Young (eay@cryptsoft.com). |
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7 | * The implementation was written so as to conform with Netscapes SSL. |
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8 | * |
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9 | * This library is free for commercial and non-commercial use as long as |
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10 | * the following conditions are aheared to. The following conditions |
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11 | * apply to all code found in this distribution, be it the RC4, RSA, |
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12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 | * included with this distribution is covered by the same copyright terms |
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14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 | * |
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16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 | * the code are not to be removed. |
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18 | * If this package is used in a product, Eric Young should be given attribution |
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19 | * as the author of the parts of the library used. |
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20 | * This can be in the form of a textual message at program startup or |
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21 | * in documentation (online or textual) provided with the package. |
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22 | * |
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23 | * Redistribution and use in source and binary forms, with or without |
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24 | * modification, are permitted provided that the following conditions |
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25 | * are met: |
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26 | * 1. Redistributions of source code must retain the copyright |
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27 | * notice, this list of conditions and the following disclaimer. |
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28 | * 2. Redistributions in binary form must reproduce the above copyright |
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29 | * notice, this list of conditions and the following disclaimer in the |
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30 | * documentation and/or other materials provided with the distribution. |
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31 | * 3. All advertising materials mentioning features or use of this software |
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32 | * must display the following acknowledgement: |
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33 | * "This product includes cryptographic software written by |
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34 | * Eric Young (eay@cryptsoft.com)" |
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35 | * The word 'cryptographic' can be left out if the rouines from the library |
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36 | * being used are not cryptographic related :-). |
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37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 | * the apps directory (application code) you must include an acknowledgement: |
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39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 | * |
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41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 | * SUCH DAMAGE. |
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52 | * |
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53 | * The licence and distribution terms for any publically available version or |
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54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 | * copied and put under another distribution licence |
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56 | * [including the GNU Public Licence.] |
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57 | */ |
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58 | |
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59 | #include <stdio.h> |
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60 | #include <stdlib.h> |
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61 | #include <string.h> |
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62 | #include <errno.h> |
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63 | #include <signal.h> |
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64 | |
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65 | #include <openssl/e_os2.h> |
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66 | |
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67 | /* With IPv6, it looks like Digital has mixed up the proper order of |
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68 | recursive header file inclusion, resulting in the compiler complaining |
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69 | that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which |
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70 | is needed to have fileno() declared correctly... So let's define u_int */ |
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71 | #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT) |
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72 | #define __U_INT |
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73 | typedef unsigned int u_int; |
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74 | #endif |
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75 | |
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76 | #define USE_SOCKETS |
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77 | #define NON_MAIN |
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78 | #include "apps.h" |
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79 | #undef USE_SOCKETS |
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80 | #undef NON_MAIN |
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81 | #include "s_apps.h" |
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82 | #include <openssl/ssl.h> |
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83 | |
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84 | static struct hostent *GetHostByName(char *name); |
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85 | #ifdef OPENSSL_SYS_WINDOWS |
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86 | static void ssl_sock_cleanup(void); |
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87 | #endif |
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88 | static int ssl_sock_init(void); |
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89 | static int init_client_ip(int *sock,unsigned char ip[4], int port); |
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90 | static int init_server(int *sock, int port); |
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91 | static int init_server_long(int *sock, int port,char *ip); |
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92 | static int do_accept(int acc_sock, int *sock, char **host); |
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93 | static int host_ip(char *str, unsigned char ip[4]); |
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94 | |
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95 | #ifdef OPENSSL_SYS_WIN16 |
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96 | #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ |
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97 | #else |
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98 | #define SOCKET_PROTOCOL IPPROTO_TCP |
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99 | #endif |
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100 | |
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101 | #ifdef OPENSSL_SYS_WINDOWS |
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102 | static struct WSAData wsa_state; |
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103 | static int wsa_init_done=0; |
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104 | |
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105 | #ifdef OPENSSL_SYS_WIN16 |
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106 | static HWND topWnd=0; |
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107 | static FARPROC lpTopWndProc=NULL; |
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108 | static FARPROC lpTopHookProc=NULL; |
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109 | extern HINSTANCE _hInstance; /* nice global CRT provides */ |
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110 | |
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111 | static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam, |
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112 | LPARAM lParam) |
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113 | { |
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114 | if (hwnd == topWnd) |
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115 | { |
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116 | switch(message) |
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117 | { |
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118 | case WM_DESTROY: |
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119 | case WM_CLOSE: |
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120 | SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc); |
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121 | ssl_sock_cleanup(); |
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122 | break; |
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123 | } |
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124 | } |
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125 | return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam); |
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126 | } |
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127 | |
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128 | static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam) |
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129 | { |
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130 | topWnd=hwnd; |
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131 | return(FALSE); |
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132 | } |
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133 | |
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134 | #endif /* OPENSSL_SYS_WIN32 */ |
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135 | #endif /* OPENSSL_SYS_WINDOWS */ |
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136 | |
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137 | #ifdef OPENSSL_SYS_WINDOWS |
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138 | static void ssl_sock_cleanup(void) |
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139 | { |
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140 | if (wsa_init_done) |
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141 | { |
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142 | wsa_init_done=0; |
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143 | #ifndef OPENSSL_SYS_WINCE |
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144 | WSACancelBlockingCall(); |
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145 | #endif |
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146 | WSACleanup(); |
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147 | } |
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148 | } |
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149 | #endif |
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150 | |
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151 | static int ssl_sock_init(void) |
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152 | { |
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153 | #ifdef WATT32 |
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154 | extern int _watt_do_exit; |
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155 | _watt_do_exit = 0; |
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156 | dbug_init(); |
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157 | if (sock_init()) |
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158 | return (0); |
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159 | #elif defined(OPENSSL_SYS_WINDOWS) |
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160 | if (!wsa_init_done) |
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161 | { |
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162 | int err; |
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163 | |
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164 | #ifdef SIGINT |
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165 | signal(SIGINT,(void (*)(int))ssl_sock_cleanup); |
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166 | #endif |
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167 | wsa_init_done=1; |
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168 | memset(&wsa_state,0,sizeof(wsa_state)); |
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169 | if (WSAStartup(0x0101,&wsa_state)!=0) |
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170 | { |
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171 | err=WSAGetLastError(); |
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172 | BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err); |
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173 | return(0); |
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174 | } |
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175 | |
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176 | #ifdef OPENSSL_SYS_WIN16 |
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177 | EnumTaskWindows(GetCurrentTask(),enumproc,0L); |
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178 | lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC); |
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179 | lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance); |
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180 | |
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181 | SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc); |
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182 | #endif /* OPENSSL_SYS_WIN16 */ |
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183 | } |
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184 | #endif /* OPENSSL_SYS_WINDOWS */ |
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185 | return(1); |
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186 | } |
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187 | |
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188 | int init_client(int *sock, char *host, int port) |
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189 | { |
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190 | unsigned char ip[4]; |
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191 | short p=0; |
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192 | |
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193 | if (!host_ip(host,&(ip[0]))) |
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194 | { |
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195 | return(0); |
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196 | } |
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197 | if (p != 0) port=p; |
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198 | return(init_client_ip(sock,ip,port)); |
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199 | } |
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200 | |
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201 | static int init_client_ip(int *sock, unsigned char ip[4], int port) |
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202 | { |
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203 | unsigned long addr; |
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204 | struct sockaddr_in them; |
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205 | int s,i; |
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206 | |
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207 | if (!ssl_sock_init()) return(0); |
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208 | |
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209 | memset((char *)&them,0,sizeof(them)); |
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210 | them.sin_family=AF_INET; |
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211 | them.sin_port=htons((unsigned short)port); |
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212 | addr=(unsigned long) |
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213 | ((unsigned long)ip[0]<<24L)| |
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214 | ((unsigned long)ip[1]<<16L)| |
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215 | ((unsigned long)ip[2]<< 8L)| |
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216 | ((unsigned long)ip[3]); |
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217 | them.sin_addr.s_addr=htonl(addr); |
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218 | |
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219 | s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); |
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220 | if (s == INVALID_SOCKET) { perror("socket"); return(0); } |
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221 | |
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222 | #ifndef OPENSSL_SYS_MPE |
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223 | i=0; |
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224 | i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); |
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225 | if (i < 0) { perror("keepalive"); return(0); } |
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226 | #endif |
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227 | |
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228 | if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1) |
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229 | { close(s); perror("connect"); return(0); } |
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230 | *sock=s; |
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231 | return(1); |
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232 | } |
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233 | |
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234 | int do_server(int port, int *ret, int (*cb)(), char *context) |
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235 | { |
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236 | int sock; |
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237 | char *name; |
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238 | int accept_socket; |
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239 | int i; |
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240 | |
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241 | if (!init_server(&accept_socket,port)) return(0); |
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242 | |
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243 | if (ret != NULL) |
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244 | { |
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245 | *ret=accept_socket; |
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246 | /* return(1);*/ |
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247 | } |
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248 | for (;;) |
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249 | { |
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250 | if (do_accept(accept_socket,&sock,&name) == 0) |
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251 | { |
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252 | SHUTDOWN(accept_socket); |
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253 | return(0); |
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254 | } |
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255 | i=(*cb)(name,sock, context); |
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256 | if (name != NULL) OPENSSL_free(name); |
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257 | SHUTDOWN2(sock); |
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258 | if (i < 0) |
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259 | { |
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260 | SHUTDOWN2(accept_socket); |
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261 | return(i); |
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262 | } |
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263 | } |
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264 | } |
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265 | |
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266 | static int init_server_long(int *sock, int port, char *ip) |
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267 | { |
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268 | int ret=0; |
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269 | struct sockaddr_in server; |
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270 | int s= -1,i; |
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271 | |
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272 | if (!ssl_sock_init()) return(0); |
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273 | |
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274 | memset((char *)&server,0,sizeof(server)); |
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275 | server.sin_family=AF_INET; |
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276 | server.sin_port=htons((unsigned short)port); |
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277 | if (ip == NULL) |
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278 | server.sin_addr.s_addr=INADDR_ANY; |
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279 | else |
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280 | /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */ |
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281 | #ifndef BIT_FIELD_LIMITS |
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282 | memcpy(&server.sin_addr.s_addr,ip,4); |
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283 | #else |
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284 | memcpy(&server.sin_addr,ip,4); |
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285 | #endif |
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286 | s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); |
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287 | |
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288 | if (s == INVALID_SOCKET) goto err; |
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289 | #if defined SOL_SOCKET && defined SO_REUSEADDR |
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290 | { |
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291 | int j = 1; |
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292 | setsockopt(s, SOL_SOCKET, SO_REUSEADDR, |
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293 | (void *) &j, sizeof j); |
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294 | } |
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295 | #endif |
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296 | if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) |
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297 | { |
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298 | #ifndef OPENSSL_SYS_WINDOWS |
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299 | perror("bind"); |
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300 | #endif |
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301 | goto err; |
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302 | } |
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303 | /* Make it 128 for linux */ |
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304 | if (listen(s,128) == -1) goto err; |
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305 | i=0; |
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306 | *sock=s; |
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307 | ret=1; |
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308 | err: |
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309 | if ((ret == 0) && (s != -1)) |
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310 | { |
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311 | SHUTDOWN(s); |
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312 | } |
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313 | return(ret); |
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314 | } |
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315 | |
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316 | static int init_server(int *sock, int port) |
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317 | { |
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318 | return(init_server_long(sock, port, NULL)); |
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319 | } |
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320 | |
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321 | static int do_accept(int acc_sock, int *sock, char **host) |
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322 | { |
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323 | int ret,i; |
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324 | struct hostent *h1,*h2; |
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325 | static struct sockaddr_in from; |
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326 | int len; |
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327 | /* struct linger ling; */ |
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328 | |
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329 | if (!ssl_sock_init()) return(0); |
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330 | |
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331 | #ifndef OPENSSL_SYS_WINDOWS |
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332 | redoit: |
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333 | #endif |
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334 | |
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335 | memset((char *)&from,0,sizeof(from)); |
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336 | len=sizeof(from); |
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337 | /* Note: under VMS with SOCKETSHR the fourth parameter is currently |
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338 | * of type (int *) whereas under other systems it is (void *) if |
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339 | * you don't have a cast it will choke the compiler: if you do |
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340 | * have a cast then you can either go for (int *) or (void *). |
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341 | */ |
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342 | ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len); |
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343 | if (ret == INVALID_SOCKET) |
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344 | { |
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345 | #ifdef OPENSSL_SYS_WINDOWS |
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346 | i=WSAGetLastError(); |
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347 | BIO_printf(bio_err,"accept error %d\n",i); |
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348 | #else |
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349 | if (errno == EINTR) |
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350 | { |
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351 | /*check_timeout(); */ |
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352 | goto redoit; |
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353 | } |
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354 | fprintf(stderr,"errno=%d ",errno); |
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355 | perror("accept"); |
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356 | #endif |
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357 | return(0); |
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358 | } |
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359 | |
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360 | /* |
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361 | ling.l_onoff=1; |
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362 | ling.l_linger=0; |
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363 | i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling)); |
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364 | if (i < 0) { perror("linger"); return(0); } |
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365 | i=0; |
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366 | i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); |
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367 | if (i < 0) { perror("keepalive"); return(0); } |
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368 | */ |
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369 | |
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370 | if (host == NULL) goto end; |
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371 | #ifndef BIT_FIELD_LIMITS |
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372 | /* I should use WSAAsyncGetHostByName() under windows */ |
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373 | h1=gethostbyaddr((char *)&from.sin_addr.s_addr, |
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374 | sizeof(from.sin_addr.s_addr),AF_INET); |
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375 | #else |
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376 | h1=gethostbyaddr((char *)&from.sin_addr, |
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377 | sizeof(struct in_addr),AF_INET); |
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378 | #endif |
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379 | if (h1 == NULL) |
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380 | { |
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381 | BIO_printf(bio_err,"bad gethostbyaddr\n"); |
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382 | *host=NULL; |
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383 | /* return(0); */ |
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384 | } |
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385 | else |
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386 | { |
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387 | if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL) |
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388 | { |
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389 | perror("OPENSSL_malloc"); |
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390 | return(0); |
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391 | } |
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392 | strcpy(*host,h1->h_name); |
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393 | |
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394 | h2=GetHostByName(*host); |
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395 | if (h2 == NULL) |
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396 | { |
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397 | BIO_printf(bio_err,"gethostbyname failure\n"); |
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398 | return(0); |
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399 | } |
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400 | i=0; |
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401 | if (h2->h_addrtype != AF_INET) |
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402 | { |
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403 | BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); |
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404 | return(0); |
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405 | } |
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406 | } |
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407 | end: |
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408 | *sock=ret; |
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409 | return(1); |
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410 | } |
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411 | |
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412 | int extract_host_port(char *str, char **host_ptr, unsigned char *ip, |
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413 | short *port_ptr) |
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414 | { |
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415 | char *h,*p; |
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416 | |
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417 | h=str; |
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418 | p=strchr(str,':'); |
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419 | if (p == NULL) |
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420 | { |
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421 | BIO_printf(bio_err,"no port defined\n"); |
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422 | return(0); |
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423 | } |
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424 | *(p++)='\0'; |
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425 | |
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426 | if ((ip != NULL) && !host_ip(str,ip)) |
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427 | goto err; |
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428 | if (host_ptr != NULL) *host_ptr=h; |
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429 | |
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430 | if (!extract_port(p,port_ptr)) |
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431 | goto err; |
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432 | return(1); |
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433 | err: |
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434 | return(0); |
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435 | } |
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436 | |
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437 | static int host_ip(char *str, unsigned char ip[4]) |
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438 | { |
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439 | unsigned int in[4]; |
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440 | int i; |
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441 | |
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442 | if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4) |
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443 | { |
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444 | for (i=0; i<4; i++) |
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445 | if (in[i] > 255) |
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446 | { |
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447 | BIO_printf(bio_err,"invalid IP address\n"); |
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448 | goto err; |
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449 | } |
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450 | ip[0]=in[0]; |
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451 | ip[1]=in[1]; |
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452 | ip[2]=in[2]; |
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453 | ip[3]=in[3]; |
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454 | } |
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455 | else |
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456 | { /* do a gethostbyname */ |
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457 | struct hostent *he; |
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458 | |
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459 | if (!ssl_sock_init()) return(0); |
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460 | |
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461 | he=GetHostByName(str); |
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462 | if (he == NULL) |
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463 | { |
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464 | BIO_printf(bio_err,"gethostbyname failure\n"); |
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465 | goto err; |
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466 | } |
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467 | /* cast to short because of win16 winsock definition */ |
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468 | if ((short)he->h_addrtype != AF_INET) |
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469 | { |
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470 | BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); |
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471 | return(0); |
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472 | } |
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473 | ip[0]=he->h_addr_list[0][0]; |
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474 | ip[1]=he->h_addr_list[0][1]; |
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475 | ip[2]=he->h_addr_list[0][2]; |
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476 | ip[3]=he->h_addr_list[0][3]; |
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477 | } |
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478 | return(1); |
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479 | err: |
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480 | return(0); |
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481 | } |
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482 | |
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483 | int extract_port(char *str, short *port_ptr) |
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484 | { |
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485 | int i; |
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486 | struct servent *s; |
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487 | |
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488 | i=atoi(str); |
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489 | if (i != 0) |
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490 | *port_ptr=(unsigned short)i; |
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491 | else |
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492 | { |
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493 | s=getservbyname(str,"tcp"); |
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494 | if (s == NULL) |
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495 | { |
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496 | BIO_printf(bio_err,"getservbyname failure for %s\n",str); |
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497 | return(0); |
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498 | } |
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499 | *port_ptr=ntohs((unsigned short)s->s_port); |
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500 | } |
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501 | return(1); |
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502 | } |
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503 | |
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504 | #define GHBN_NUM 4 |
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505 | static struct ghbn_cache_st |
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506 | { |
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507 | char name[128]; |
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508 | struct hostent ent; |
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509 | unsigned long order; |
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510 | } ghbn_cache[GHBN_NUM]; |
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511 | |
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512 | static unsigned long ghbn_hits=0L; |
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513 | static unsigned long ghbn_miss=0L; |
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514 | |
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515 | static struct hostent *GetHostByName(char *name) |
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516 | { |
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517 | struct hostent *ret; |
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518 | int i,lowi=0; |
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519 | unsigned long low= (unsigned long)-1; |
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520 | |
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521 | for (i=0; i<GHBN_NUM; i++) |
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522 | { |
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523 | if (low > ghbn_cache[i].order) |
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524 | { |
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525 | low=ghbn_cache[i].order; |
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526 | lowi=i; |
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527 | } |
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528 | if (ghbn_cache[i].order > 0) |
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529 | { |
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530 | if (strncmp(name,ghbn_cache[i].name,128) == 0) |
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531 | break; |
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532 | } |
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533 | } |
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534 | if (i == GHBN_NUM) /* no hit*/ |
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535 | { |
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536 | ghbn_miss++; |
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537 | ret=gethostbyname(name); |
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538 | if (ret == NULL) return(NULL); |
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539 | /* else add to cache */ |
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540 | if(strlen(name) < sizeof ghbn_cache[0].name) |
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541 | { |
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542 | strcpy(ghbn_cache[lowi].name,name); |
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543 | memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent)); |
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544 | ghbn_cache[lowi].order=ghbn_miss+ghbn_hits; |
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545 | } |
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546 | return(ret); |
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547 | } |
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548 | else |
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549 | { |
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550 | ghbn_hits++; |
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551 | ret= &(ghbn_cache[i].ent); |
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552 | ghbn_cache[i].order=ghbn_miss+ghbn_hits; |
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553 | return(ret); |
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554 | } |
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555 | } |
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