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620 lines
15 KiB
620 lines
15 KiB
/* apps/s_socket.c - socket-related functions used by s_client and s_server */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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#ifdef FLAT_INC
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#include "e_os2.h"
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#else
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#include "../e_os2.h"
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#endif
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/* With IPv6, it looks like Digital has mixed up the proper order of
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recursive header file inclusion, resulting in the compiler complaining
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that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
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is needed to have fileno() declared correctly... So let's define u_int */
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#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
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#define __U_INT
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typedef unsigned int u_int;
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#endif
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#define USE_SOCKETS
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#define NON_MAIN
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#include "apps.h"
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#undef USE_SOCKETS
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#undef NON_MAIN
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#include "s_apps.h"
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#include <openssl/ssl.h>
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#ifdef FLAT_INC
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#include "e_os.h"
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#else
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#include "../e_os.h"
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#endif
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#ifndef OPENSSL_NO_SOCK
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#if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
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#include "netdb.h"
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#endif
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static struct hostent *GetHostByName(char *name);
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#if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
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static void ssl_sock_cleanup(void);
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#endif
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static int ssl_sock_init(void);
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static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
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static int init_server(int *sock, int port, int type);
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static int init_server_long(int *sock, int port,char *ip, int type);
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static int do_accept(int acc_sock, int *sock, char **host);
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static int host_ip(char *str, unsigned char ip[4]);
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#ifdef OPENSSL_SYS_WIN16
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#define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
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#else
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#define SOCKET_PROTOCOL IPPROTO_TCP
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#endif
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#if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
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static int wsa_init_done=0;
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#endif
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#ifdef OPENSSL_SYS_WINDOWS
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static struct WSAData wsa_state;
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static int wsa_init_done=0;
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#ifdef OPENSSL_SYS_WIN16
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static HWND topWnd=0;
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static FARPROC lpTopWndProc=NULL;
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static FARPROC lpTopHookProc=NULL;
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extern HINSTANCE _hInstance; /* nice global CRT provides */
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static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
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LPARAM lParam)
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{
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if (hwnd == topWnd)
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{
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switch(message)
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{
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case WM_DESTROY:
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case WM_CLOSE:
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SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
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ssl_sock_cleanup();
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break;
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}
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}
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return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
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}
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static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
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{
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topWnd=hwnd;
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return(FALSE);
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}
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#endif /* OPENSSL_SYS_WIN32 */
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#endif /* OPENSSL_SYS_WINDOWS */
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#ifdef OPENSSL_SYS_WINDOWS
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static void ssl_sock_cleanup(void)
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{
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if (wsa_init_done)
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{
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wsa_init_done=0;
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#ifndef OPENSSL_SYS_WINCE
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WSACancelBlockingCall();
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#endif
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WSACleanup();
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}
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}
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#elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
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static void sock_cleanup(void)
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{
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if (wsa_init_done)
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{
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wsa_init_done=0;
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WSACleanup();
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}
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}
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#endif
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static int ssl_sock_init(void)
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{
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#ifdef WATT32
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extern int _watt_do_exit;
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_watt_do_exit = 0;
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if (sock_init())
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return (0);
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#elif defined(OPENSSL_SYS_WINDOWS)
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if (!wsa_init_done)
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{
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int err;
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#ifdef SIGINT
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signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
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#endif
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wsa_init_done=1;
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memset(&wsa_state,0,sizeof(wsa_state));
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if (WSAStartup(0x0101,&wsa_state)!=0)
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{
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err=WSAGetLastError();
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BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
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return(0);
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}
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#ifdef OPENSSL_SYS_WIN16
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EnumTaskWindows(GetCurrentTask(),enumproc,0L);
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lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
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lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
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SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
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#endif /* OPENSSL_SYS_WIN16 */
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}
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#elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
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WORD wVerReq;
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WSADATA wsaData;
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int err;
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if (!wsa_init_done)
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{
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# ifdef SIGINT
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signal(SIGINT,(void (*)(int))sock_cleanup);
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# endif
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wsa_init_done=1;
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wVerReq = MAKEWORD( 2, 0 );
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err = WSAStartup(wVerReq,&wsaData);
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if (err != 0)
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{
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BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
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return(0);
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}
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}
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#endif /* OPENSSL_SYS_WINDOWS */
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return(1);
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}
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int init_client(int *sock, char *host, int port, int type)
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{
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unsigned char ip[4];
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if (!host_ip(host,&(ip[0])))
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{
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return(0);
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}
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return(init_client_ip(sock,ip,port,type));
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}
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static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
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{
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unsigned long addr;
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struct sockaddr_in them;
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int s,i;
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if (!ssl_sock_init()) return(0);
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memset((char *)&them,0,sizeof(them));
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them.sin_family=AF_INET;
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them.sin_port=htons((unsigned short)port);
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addr=(unsigned long)
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((unsigned long)ip[0]<<24L)|
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((unsigned long)ip[1]<<16L)|
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((unsigned long)ip[2]<< 8L)|
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((unsigned long)ip[3]);
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them.sin_addr.s_addr=htonl(addr);
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if (type == SOCK_STREAM)
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s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
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else /* ( type == SOCK_DGRAM) */
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s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
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if (s == INVALID_SOCKET) { perror("socket"); return(0); }
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#if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
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if (type == SOCK_STREAM)
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{
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i=0;
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i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
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if (i < 0) { perror("keepalive"); return(0); }
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}
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#endif
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if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
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{ closesocket(s); perror("connect"); return(0); }
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*sock=s;
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return(1);
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}
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int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
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{
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int sock;
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char *name = NULL;
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int accept_socket = 0;
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int i;
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if (!init_server(&accept_socket,port,type)) return(0);
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if (ret != NULL)
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{
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*ret=accept_socket;
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/* return(1);*/
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}
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for (;;)
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{
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if (type==SOCK_STREAM)
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{
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if (do_accept(accept_socket,&sock,&name) == 0)
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{
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SHUTDOWN(accept_socket);
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return(0);
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}
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}
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else
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sock = accept_socket;
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i=(*cb)(name,sock, context);
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if (name != NULL) OPENSSL_free(name);
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if (type==SOCK_STREAM)
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SHUTDOWN2(sock);
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if (i < 0)
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{
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SHUTDOWN2(accept_socket);
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return(i);
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}
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}
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}
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static int init_server_long(int *sock, int port, char *ip, int type)
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{
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int ret=0;
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struct sockaddr_in server;
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int s= -1;
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if (!ssl_sock_init()) return(0);
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memset((char *)&server,0,sizeof(server));
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server.sin_family=AF_INET;
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server.sin_port=htons((unsigned short)port);
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if (ip == NULL)
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server.sin_addr.s_addr=INADDR_ANY;
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else
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/* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
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#ifndef BIT_FIELD_LIMITS
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memcpy(&server.sin_addr.s_addr,ip,4);
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#else
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memcpy(&server.sin_addr,ip,4);
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#endif
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if (type == SOCK_STREAM)
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s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
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else /* type == SOCK_DGRAM */
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s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
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if (s == INVALID_SOCKET) goto err;
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#if defined SOL_SOCKET && defined SO_REUSEADDR
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{
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int j = 1;
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
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(void *) &j, sizeof j);
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}
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#endif
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if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
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{
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#ifndef OPENSSL_SYS_WINDOWS
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perror("bind");
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#endif
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goto err;
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}
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/* Make it 128 for linux */
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if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
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*sock=s;
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ret=1;
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err:
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if ((ret == 0) && (s != -1))
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{
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SHUTDOWN(s);
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}
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return(ret);
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}
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static int init_server(int *sock, int port, int type)
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{
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return(init_server_long(sock, port, NULL, type));
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}
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static int do_accept(int acc_sock, int *sock, char **host)
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{
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int ret;
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struct hostent *h1,*h2;
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static struct sockaddr_in from;
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int len;
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/* struct linger ling; */
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if (!ssl_sock_init()) return(0);
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#ifndef OPENSSL_SYS_WINDOWS
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redoit:
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#endif
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memset((char *)&from,0,sizeof(from));
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len=sizeof(from);
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/* Note: under VMS with SOCKETSHR the fourth parameter is currently
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* of type (int *) whereas under other systems it is (void *) if
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* you don't have a cast it will choke the compiler: if you do
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* have a cast then you can either go for (int *) or (void *).
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*/
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ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
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if (ret == INVALID_SOCKET)
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{
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#if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
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int i;
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i=WSAGetLastError();
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BIO_printf(bio_err,"accept error %d\n",i);
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#else
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if (errno == EINTR)
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{
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/*check_timeout(); */
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goto redoit;
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}
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fprintf(stderr,"errno=%d ",errno);
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perror("accept");
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#endif
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return(0);
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}
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/*
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ling.l_onoff=1;
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ling.l_linger=0;
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i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
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if (i < 0) { perror("linger"); return(0); }
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i=0;
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i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
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if (i < 0) { perror("keepalive"); return(0); }
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*/
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if (host == NULL) goto end;
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#ifndef BIT_FIELD_LIMITS
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/* I should use WSAAsyncGetHostByName() under windows */
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h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
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sizeof(from.sin_addr.s_addr),AF_INET);
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#else
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h1=gethostbyaddr((char *)&from.sin_addr,
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sizeof(struct in_addr),AF_INET);
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#endif
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if (h1 == NULL)
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{
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BIO_printf(bio_err,"bad gethostbyaddr\n");
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*host=NULL;
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/* return(0); */
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}
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else
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{
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if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
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|
{
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perror("OPENSSL_malloc");
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return(0);
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}
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BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
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h2=GetHostByName(*host);
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if (h2 == NULL)
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{
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BIO_printf(bio_err,"gethostbyname failure\n");
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return(0);
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}
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if (h2->h_addrtype != AF_INET)
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|
{
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BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
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return(0);
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}
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}
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|
end:
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*sock=ret;
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return(1);
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}
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|
int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
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short *port_ptr)
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|
{
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|
char *h,*p;
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h=str;
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p=strchr(str,':');
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if (p == NULL)
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{
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BIO_printf(bio_err,"no port defined\n");
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return(0);
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}
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*(p++)='\0';
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if ((ip != NULL) && !host_ip(str,ip))
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goto err;
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if (host_ptr != NULL) *host_ptr=h;
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|
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if (!extract_port(p,port_ptr))
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goto err;
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return(1);
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|
err:
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return(0);
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}
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|
|
static int host_ip(char *str, unsigned char ip[4])
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|
{
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|
unsigned int in[4];
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|
int i;
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|
if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
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{
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for (i=0; i<4; i++)
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|
if (in[i] > 255)
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{
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BIO_printf(bio_err,"invalid IP address\n");
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goto err;
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}
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|
ip[0]=in[0];
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ip[1]=in[1];
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|
ip[2]=in[2];
|
|
ip[3]=in[3];
|
|
}
|
|
else
|
|
{ /* do a gethostbyname */
|
|
struct hostent *he;
|
|
|
|
if (!ssl_sock_init()) return(0);
|
|
|
|
he=GetHostByName(str);
|
|
if (he == NULL)
|
|
{
|
|
BIO_printf(bio_err,"gethostbyname failure\n");
|
|
goto err;
|
|
}
|
|
/* cast to short because of win16 winsock definition */
|
|
if ((short)he->h_addrtype != AF_INET)
|
|
{
|
|
BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
|
|
return(0);
|
|
}
|
|
ip[0]=he->h_addr_list[0][0];
|
|
ip[1]=he->h_addr_list[0][1];
|
|
ip[2]=he->h_addr_list[0][2];
|
|
ip[3]=he->h_addr_list[0][3];
|
|
}
|
|
return(1);
|
|
err:
|
|
return(0);
|
|
}
|
|
|
|
int extract_port(char *str, short *port_ptr)
|
|
{
|
|
int i;
|
|
struct servent *s;
|
|
|
|
i=atoi(str);
|
|
if (i != 0)
|
|
*port_ptr=(unsigned short)i;
|
|
else
|
|
{
|
|
s=getservbyname(str,"tcp");
|
|
if (s == NULL)
|
|
{
|
|
BIO_printf(bio_err,"getservbyname failure for %s\n",str);
|
|
return(0);
|
|
}
|
|
*port_ptr=ntohs((unsigned short)s->s_port);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
#define GHBN_NUM 4
|
|
static struct ghbn_cache_st
|
|
{
|
|
char name[128];
|
|
struct hostent ent;
|
|
unsigned long order;
|
|
} ghbn_cache[GHBN_NUM];
|
|
|
|
static unsigned long ghbn_hits=0L;
|
|
static unsigned long ghbn_miss=0L;
|
|
|
|
static struct hostent *GetHostByName(char *name)
|
|
{
|
|
struct hostent *ret;
|
|
int i,lowi=0;
|
|
unsigned long low= (unsigned long)-1;
|
|
|
|
for (i=0; i<GHBN_NUM; i++)
|
|
{
|
|
if (low > ghbn_cache[i].order)
|
|
{
|
|
low=ghbn_cache[i].order;
|
|
lowi=i;
|
|
}
|
|
if (ghbn_cache[i].order > 0)
|
|
{
|
|
if (strncmp(name,ghbn_cache[i].name,128) == 0)
|
|
break;
|
|
}
|
|
}
|
|
if (i == GHBN_NUM) /* no hit*/
|
|
{
|
|
ghbn_miss++;
|
|
ret=gethostbyname(name);
|
|
if (ret == NULL) return(NULL);
|
|
/* else add to cache */
|
|
if(strlen(name) < sizeof ghbn_cache[0].name)
|
|
{
|
|
strcpy(ghbn_cache[lowi].name,name);
|
|
memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
|
|
ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
|
|
}
|
|
return(ret);
|
|
}
|
|
else
|
|
{
|
|
ghbn_hits++;
|
|
ret= &(ghbn_cache[i].ent);
|
|
ghbn_cache[i].order=ghbn_miss+ghbn_hits;
|
|
return(ret);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|