[15529] | 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 | /* With IPv6, it looks like Digital has mixed up the proper order of |
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| 66 | recursive header file inclusion, resulting in the compiler complaining |
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| 67 | that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which |
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| 68 | is needed to have fileno() declared correctly... So let's define u_int */ |
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| 69 | #if defined(VMS) && defined(__DECC) && !defined(__U_INT) |
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| 70 | #define __U_INT |
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| 71 | typedef unsigned int u_int; |
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| 72 | #endif |
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| 73 | |
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| 74 | #define USE_SOCKETS |
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| 75 | #define NON_MAIN |
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| 76 | #include "apps.h" |
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| 77 | #undef USE_SOCKETS |
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| 78 | #undef NON_MAIN |
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| 79 | #include "s_apps.h" |
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| 80 | #include <openssl/ssl.h> |
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| 81 | |
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| 82 | static struct hostent *GetHostByName(char *name); |
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| 83 | #ifdef WINDOWS |
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| 84 | static void sock_cleanup(void); |
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| 85 | #endif |
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| 86 | static int sock_init(void); |
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| 87 | static int init_client_ip(int *sock,unsigned char ip[4], int port); |
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| 88 | static int init_server(int *sock, int port); |
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| 89 | static int init_server_long(int *sock, int port,char *ip); |
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| 90 | static int do_accept(int acc_sock, int *sock, char **host); |
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| 91 | static int host_ip(char *str, unsigned char ip[4]); |
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| 92 | |
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| 93 | #ifdef WIN16 |
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| 94 | #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ |
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| 95 | #else |
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| 96 | #define SOCKET_PROTOCOL IPPROTO_TCP |
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| 97 | #endif |
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| 98 | |
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| 99 | #ifdef WINDOWS |
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| 100 | static struct WSAData wsa_state; |
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| 101 | static int wsa_init_done=0; |
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| 102 | |
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| 103 | #ifdef WIN16 |
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| 104 | static HWND topWnd=0; |
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| 105 | static FARPROC lpTopWndProc=NULL; |
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| 106 | static FARPROC lpTopHookProc=NULL; |
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| 107 | extern HINSTANCE _hInstance; /* nice global CRT provides */ |
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| 108 | |
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| 109 | static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam, |
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| 110 | LPARAM lParam) |
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| 111 | { |
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| 112 | if (hwnd == topWnd) |
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| 113 | { |
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| 114 | switch(message) |
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| 115 | { |
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| 116 | case WM_DESTROY: |
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| 117 | case WM_CLOSE: |
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| 118 | SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc); |
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| 119 | sock_cleanup(); |
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| 120 | break; |
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| 121 | } |
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| 122 | } |
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| 123 | return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam); |
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| 124 | } |
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| 125 | |
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| 126 | static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam) |
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| 127 | { |
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| 128 | topWnd=hwnd; |
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| 129 | return(FALSE); |
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| 130 | } |
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| 131 | |
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| 132 | #endif /* WIN32 */ |
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| 133 | #endif /* WINDOWS */ |
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| 134 | |
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| 135 | #ifdef WINDOWS |
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| 136 | static void sock_cleanup(void) |
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| 137 | { |
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| 138 | if (wsa_init_done) |
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| 139 | { |
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| 140 | wsa_init_done=0; |
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| 141 | WSACancelBlockingCall(); |
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| 142 | WSACleanup(); |
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| 143 | } |
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| 144 | } |
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| 145 | #endif |
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| 146 | |
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| 147 | static int sock_init(void) |
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| 148 | { |
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| 149 | #ifdef WINDOWS |
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| 150 | if (!wsa_init_done) |
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| 151 | { |
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| 152 | int err; |
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| 153 | |
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| 154 | #ifdef SIGINT |
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| 155 | signal(SIGINT,(void (*)(int))sock_cleanup); |
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| 156 | #endif |
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| 157 | wsa_init_done=1; |
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| 158 | memset(&wsa_state,0,sizeof(wsa_state)); |
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| 159 | if (WSAStartup(0x0101,&wsa_state)!=0) |
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| 160 | { |
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| 161 | err=WSAGetLastError(); |
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| 162 | BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err); |
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| 163 | return(0); |
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| 164 | } |
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| 165 | |
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| 166 | #ifdef WIN16 |
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| 167 | EnumTaskWindows(GetCurrentTask(),enumproc,0L); |
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| 168 | lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC); |
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| 169 | lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance); |
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| 170 | |
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| 171 | SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc); |
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| 172 | #endif /* WIN16 */ |
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| 173 | } |
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| 174 | #endif /* WINDOWS */ |
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| 175 | return(1); |
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| 176 | } |
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| 177 | |
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| 178 | int init_client(int *sock, char *host, int port) |
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| 179 | { |
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| 180 | unsigned char ip[4]; |
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| 181 | short p=0; |
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| 182 | |
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| 183 | if (!host_ip(host,&(ip[0]))) |
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| 184 | { |
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| 185 | return(0); |
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| 186 | } |
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| 187 | if (p != 0) port=p; |
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| 188 | return(init_client_ip(sock,ip,port)); |
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| 189 | } |
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| 190 | |
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| 191 | static int init_client_ip(int *sock, unsigned char ip[4], int port) |
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| 192 | { |
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| 193 | unsigned long addr; |
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| 194 | struct sockaddr_in them; |
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| 195 | int s,i; |
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| 196 | |
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| 197 | if (!sock_init()) return(0); |
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| 198 | |
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| 199 | memset((char *)&them,0,sizeof(them)); |
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| 200 | them.sin_family=AF_INET; |
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| 201 | them.sin_port=htons((unsigned short)port); |
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| 202 | addr=(unsigned long) |
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| 203 | ((unsigned long)ip[0]<<24L)| |
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| 204 | ((unsigned long)ip[1]<<16L)| |
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| 205 | ((unsigned long)ip[2]<< 8L)| |
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| 206 | ((unsigned long)ip[3]); |
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| 207 | them.sin_addr.s_addr=htonl(addr); |
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| 208 | |
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| 209 | s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); |
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| 210 | if (s == INVALID_SOCKET) { perror("socket"); return(0); } |
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| 211 | |
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| 212 | #ifndef MPE |
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| 213 | i=0; |
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| 214 | i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); |
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| 215 | if (i < 0) { perror("keepalive"); return(0); } |
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| 216 | #endif |
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| 217 | |
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| 218 | if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1) |
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| 219 | { close(s); perror("connect"); return(0); } |
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| 220 | *sock=s; |
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| 221 | return(1); |
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| 222 | } |
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| 223 | |
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| 224 | int do_server(int port, int *ret, int (*cb)(), char *context) |
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| 225 | { |
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| 226 | int sock; |
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| 227 | char *name; |
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| 228 | int accept_socket; |
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| 229 | int i; |
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| 230 | |
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| 231 | if (!init_server(&accept_socket,port)) return(0); |
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| 232 | |
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| 233 | if (ret != NULL) |
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| 234 | { |
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| 235 | *ret=accept_socket; |
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| 236 | /* return(1);*/ |
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| 237 | } |
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| 238 | for (;;) |
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| 239 | { |
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| 240 | if (do_accept(accept_socket,&sock,&name) == 0) |
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| 241 | { |
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| 242 | SHUTDOWN(accept_socket); |
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| 243 | return(0); |
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| 244 | } |
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| 245 | i=(*cb)(name,sock, context); |
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| 246 | if (name != NULL) OPENSSL_free(name); |
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| 247 | SHUTDOWN2(sock); |
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| 248 | if (i < 0) |
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| 249 | { |
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| 250 | SHUTDOWN2(accept_socket); |
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| 251 | return(i); |
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| 252 | } |
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| 253 | } |
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| 254 | } |
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| 255 | |
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| 256 | static int init_server_long(int *sock, int port, char *ip) |
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| 257 | { |
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| 258 | int ret=0; |
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| 259 | struct sockaddr_in server; |
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| 260 | int s= -1,i; |
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| 261 | |
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| 262 | if (!sock_init()) return(0); |
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| 263 | |
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| 264 | memset((char *)&server,0,sizeof(server)); |
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| 265 | server.sin_family=AF_INET; |
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| 266 | server.sin_port=htons((unsigned short)port); |
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| 267 | if (ip == NULL) |
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| 268 | server.sin_addr.s_addr=INADDR_ANY; |
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| 269 | else |
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| 270 | /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */ |
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| 271 | #ifndef BIT_FIELD_LIMITS |
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| 272 | memcpy(&server.sin_addr.s_addr,ip,4); |
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| 273 | #else |
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| 274 | memcpy(&server.sin_addr,ip,4); |
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| 275 | #endif |
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| 276 | s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); |
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| 277 | |
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| 278 | if (s == INVALID_SOCKET) goto err; |
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| 279 | #if defined SOL_SOCKET && defined SO_REUSEADDR |
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| 280 | { |
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| 281 | int j = 1; |
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| 282 | setsockopt(s, SOL_SOCKET, SO_REUSEADDR, |
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| 283 | (void *) &j, sizeof j); |
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| 284 | } |
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| 285 | #endif |
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| 286 | if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) |
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| 287 | { |
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| 288 | #ifndef WINDOWS |
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| 289 | perror("bind"); |
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| 290 | #endif |
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| 291 | goto err; |
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| 292 | } |
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| 293 | /* Make it 128 for linux */ |
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| 294 | if (listen(s,128) == -1) goto err; |
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| 295 | i=0; |
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| 296 | *sock=s; |
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| 297 | ret=1; |
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| 298 | err: |
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| 299 | if ((ret == 0) && (s != -1)) |
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| 300 | { |
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| 301 | SHUTDOWN(s); |
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| 302 | } |
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| 303 | return(ret); |
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| 304 | } |
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| 305 | |
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| 306 | static int init_server(int *sock, int port) |
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| 307 | { |
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| 308 | return(init_server_long(sock, port, NULL)); |
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| 309 | } |
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| 310 | |
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| 311 | static int do_accept(int acc_sock, int *sock, char **host) |
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| 312 | { |
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| 313 | int ret,i; |
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| 314 | struct hostent *h1,*h2; |
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| 315 | static struct sockaddr_in from; |
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| 316 | int len; |
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| 317 | /* struct linger ling; */ |
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| 318 | |
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| 319 | if (!sock_init()) return(0); |
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| 320 | |
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| 321 | #ifndef WINDOWS |
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| 322 | redoit: |
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| 323 | #endif |
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| 324 | |
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| 325 | memset((char *)&from,0,sizeof(from)); |
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| 326 | len=sizeof(from); |
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| 327 | /* Note: under VMS with SOCKETSHR the fourth parameter is currently |
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| 328 | * of type (int *) whereas under other systems it is (void *) if |
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| 329 | * you don't have a cast it will choke the compiler: if you do |
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| 330 | * have a cast then you can either go for (int *) or (void *). |
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| 331 | */ |
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| 332 | ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len); |
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| 333 | if (ret == INVALID_SOCKET) |
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| 334 | { |
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| 335 | #ifdef WINDOWS |
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| 336 | i=WSAGetLastError(); |
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| 337 | BIO_printf(bio_err,"accept error %d\n",i); |
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| 338 | #else |
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| 339 | if (errno == EINTR) |
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| 340 | { |
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| 341 | /*check_timeout(); */ |
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| 342 | goto redoit; |
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| 343 | } |
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| 344 | fprintf(stderr,"errno=%d ",errno); |
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| 345 | perror("accept"); |
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| 346 | #endif |
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| 347 | return(0); |
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| 348 | } |
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| 349 | |
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| 350 | /* |
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| 351 | ling.l_onoff=1; |
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| 352 | ling.l_linger=0; |
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| 353 | i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling)); |
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| 354 | if (i < 0) { perror("linger"); return(0); } |
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| 355 | i=0; |
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| 356 | i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i)); |
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| 357 | if (i < 0) { perror("keepalive"); return(0); } |
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| 358 | */ |
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| 359 | |
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| 360 | if (host == NULL) goto end; |
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| 361 | #ifndef BIT_FIELD_LIMITS |
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| 362 | /* I should use WSAAsyncGetHostByName() under windows */ |
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| 363 | h1=gethostbyaddr((char *)&from.sin_addr.s_addr, |
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| 364 | sizeof(from.sin_addr.s_addr),AF_INET); |
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| 365 | #else |
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| 366 | h1=gethostbyaddr((char *)&from.sin_addr, |
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| 367 | sizeof(struct in_addr),AF_INET); |
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| 368 | #endif |
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| 369 | if (h1 == NULL) |
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| 370 | { |
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| 371 | BIO_printf(bio_err,"bad gethostbyaddr\n"); |
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| 372 | *host=NULL; |
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| 373 | /* return(0); */ |
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| 374 | } |
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| 375 | else |
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| 376 | { |
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| 377 | if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL) |
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| 378 | { |
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| 379 | perror("OPENSSL_malloc"); |
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| 380 | return(0); |
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| 381 | } |
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| 382 | strcpy(*host,h1->h_name); |
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| 383 | |
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| 384 | h2=GetHostByName(*host); |
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| 385 | if (h2 == NULL) |
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| 386 | { |
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| 387 | BIO_printf(bio_err,"gethostbyname failure\n"); |
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| 388 | return(0); |
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| 389 | } |
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| 390 | i=0; |
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| 391 | if (h2->h_addrtype != AF_INET) |
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| 392 | { |
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| 393 | BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); |
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| 394 | return(0); |
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| 395 | } |
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| 396 | } |
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| 397 | end: |
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| 398 | *sock=ret; |
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| 399 | return(1); |
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| 400 | } |
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| 401 | |
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| 402 | int extract_host_port(char *str, char **host_ptr, unsigned char *ip, |
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| 403 | short *port_ptr) |
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| 404 | { |
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| 405 | char *h,*p; |
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| 406 | |
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| 407 | h=str; |
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| 408 | p=strchr(str,':'); |
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| 409 | if (p == NULL) |
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| 410 | { |
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| 411 | BIO_printf(bio_err,"no port defined\n"); |
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| 412 | return(0); |
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| 413 | } |
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| 414 | *(p++)='\0'; |
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| 415 | |
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| 416 | if ((ip != NULL) && !host_ip(str,ip)) |
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| 417 | goto err; |
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| 418 | if (host_ptr != NULL) *host_ptr=h; |
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| 419 | |
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| 420 | if (!extract_port(p,port_ptr)) |
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| 421 | goto err; |
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| 422 | return(1); |
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| 423 | err: |
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| 424 | return(0); |
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| 425 | } |
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| 426 | |
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| 427 | static int host_ip(char *str, unsigned char ip[4]) |
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| 428 | { |
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| 429 | unsigned int in[4]; |
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| 430 | int i; |
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| 431 | |
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| 432 | if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4) |
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| 433 | { |
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| 434 | for (i=0; i<4; i++) |
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| 435 | if (in[i] > 255) |
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| 436 | { |
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| 437 | BIO_printf(bio_err,"invalid IP address\n"); |
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| 438 | goto err; |
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| 439 | } |
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| 440 | ip[0]=in[0]; |
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| 441 | ip[1]=in[1]; |
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| 442 | ip[2]=in[2]; |
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| 443 | ip[3]=in[3]; |
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| 444 | } |
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| 445 | else |
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| 446 | { /* do a gethostbyname */ |
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| 447 | struct hostent *he; |
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| 448 | |
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| 449 | if (!sock_init()) return(0); |
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| 450 | |
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| 451 | he=GetHostByName(str); |
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| 452 | if (he == NULL) |
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| 453 | { |
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| 454 | BIO_printf(bio_err,"gethostbyname failure\n"); |
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| 455 | goto err; |
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| 456 | } |
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| 457 | /* cast to short because of win16 winsock definition */ |
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| 458 | if ((short)he->h_addrtype != AF_INET) |
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| 459 | { |
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| 460 | BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n"); |
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| 461 | return(0); |
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| 462 | } |
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| 463 | ip[0]=he->h_addr_list[0][0]; |
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| 464 | ip[1]=he->h_addr_list[0][1]; |
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| 465 | ip[2]=he->h_addr_list[0][2]; |
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| 466 | ip[3]=he->h_addr_list[0][3]; |
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| 467 | } |
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| 468 | return(1); |
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| 469 | err: |
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| 470 | return(0); |
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| 471 | } |
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| 472 | |
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| 473 | int extract_port(char *str, short *port_ptr) |
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| 474 | { |
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| 475 | int i; |
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| 476 | struct servent *s; |
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| 477 | |
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| 478 | i=atoi(str); |
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| 479 | if (i != 0) |
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| 480 | *port_ptr=(unsigned short)i; |
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| 481 | else |
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| 482 | { |
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| 483 | s=getservbyname(str,"tcp"); |
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| 484 | if (s == NULL) |
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| 485 | { |
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| 486 | BIO_printf(bio_err,"getservbyname failure for %s\n",str); |
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| 487 | return(0); |
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| 488 | } |
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| 489 | *port_ptr=ntohs((unsigned short)s->s_port); |
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| 490 | } |
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| 491 | return(1); |
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| 492 | } |
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| 493 | |
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| 494 | #define GHBN_NUM 4 |
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| 495 | static struct ghbn_cache_st |
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| 496 | { |
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| 497 | char name[128]; |
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| 498 | struct hostent ent; |
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| 499 | unsigned long order; |
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| 500 | } ghbn_cache[GHBN_NUM]; |
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| 501 | |
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| 502 | static unsigned long ghbn_hits=0L; |
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| 503 | static unsigned long ghbn_miss=0L; |
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| 504 | |
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| 505 | static struct hostent *GetHostByName(char *name) |
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| 506 | { |
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| 507 | struct hostent *ret; |
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| 508 | int i,lowi=0; |
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| 509 | unsigned long low= (unsigned long)-1; |
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| 510 | |
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| 511 | for (i=0; i<GHBN_NUM; i++) |
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| 512 | { |
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| 513 | if (low > ghbn_cache[i].order) |
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| 514 | { |
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| 515 | low=ghbn_cache[i].order; |
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| 516 | lowi=i; |
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| 517 | } |
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| 518 | if (ghbn_cache[i].order > 0) |
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| 519 | { |
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| 520 | if (strncmp(name,ghbn_cache[i].name,128) == 0) |
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| 521 | break; |
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| 522 | } |
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| 523 | } |
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| 524 | if (i == GHBN_NUM) /* no hit*/ |
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| 525 | { |
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| 526 | ghbn_miss++; |
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| 527 | ret=gethostbyname(name); |
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| 528 | if (ret == NULL) return(NULL); |
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| 529 | /* else add to cache */ |
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| 530 | strncpy(ghbn_cache[lowi].name,name,128); |
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| 531 | memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent)); |
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| 532 | ghbn_cache[lowi].order=ghbn_miss+ghbn_hits; |
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| 533 | return(ret); |
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| 534 | } |
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| 535 | else |
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| 536 | { |
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| 537 | ghbn_hits++; |
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| 538 | ret= &(ghbn_cache[i].ent); |
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| 539 | ghbn_cache[i].order=ghbn_miss+ghbn_hits; |
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| 540 | return(ret); |
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| 541 | } |
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| 542 | } |
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