26a3a48d65
like Malloc, Realloc and especially Free conflict with already existing names on some operating systems or other packages. That is reason enough to change the names of the OpenSSL memory allocation macros to something that has a better chance of being unique, like prepending them with OPENSSL_. This change includes all the name changes needed throughout all C files.
540 lines
13 KiB
C
540 lines
13 KiB
C
/* 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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/* 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(VMS) && defined(__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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static struct hostent *GetHostByName(char *name);
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#ifdef WINDOWS
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static void sock_cleanup(void);
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#endif
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static int sock_init(void);
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static int init_client_ip(int *sock,unsigned char ip[4], int port);
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static int init_server(int *sock, int port);
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static int init_server_long(int *sock, int port,char *ip);
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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 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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#ifdef 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 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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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 /* WIN32 */
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#endif /* WINDOWS */
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#ifdef WINDOWS
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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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WSACancelBlockingCall();
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WSACleanup();
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}
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}
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#endif
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static int sock_init(void)
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{
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#ifdef 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))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 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 /* WIN16 */
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}
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#endif /* WINDOWS */
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return(1);
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}
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int init_client(int *sock, char *host, int port)
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{
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unsigned char ip[4];
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short p=0;
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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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if (p != 0) port=p;
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return(init_client_ip(sock,ip,port));
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}
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static int init_client_ip(int *sock, unsigned char ip[4], int port)
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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 (!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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s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
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if (s == INVALID_SOCKET) { perror("socket"); return(0); }
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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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if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
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{ close(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 *ret, int (*cb)(), char *context)
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{
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int sock;
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char *name;
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int accept_socket;
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int i;
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if (!init_server(&accept_socket,port)) 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 (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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i=(*cb)(name,sock, context);
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if (name != NULL) OPENSSL_free(name);
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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)
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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,i;
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if (!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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s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
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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 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 (listen(s,128) == -1) goto err;
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i=0;
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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)
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{
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return(init_server_long(sock, port, NULL));
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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,i;
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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 (!sock_init()) return(0);
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#ifndef 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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#ifdef WINDOWS
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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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strcpy(*host,h1->h_name);
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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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i=0;
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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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|
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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|
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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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|
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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];
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|
ip[3]=in[3];
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|
}
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|
else
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|
{ /* do a gethostbyname */
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|
struct hostent *he;
|
|
|
|
if (!sock_init()) return(0);
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|
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|
he=GetHostByName(str);
|
|
if (he == NULL)
|
|
{
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|
BIO_printf(bio_err,"gethostbyname failure\n");
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|
goto err;
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|
}
|
|
/* cast to short because of win16 winsock definition */
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|
if ((short)he->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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|
ip[0]=he->h_addr_list[0][0];
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|
ip[1]=he->h_addr_list[0][1];
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|
ip[2]=he->h_addr_list[0][2];
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|
ip[3]=he->h_addr_list[0][3];
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|
}
|
|
return(1);
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|
err:
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|
return(0);
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|
}
|
|
|
|
int extract_port(char *str, short *port_ptr)
|
|
{
|
|
int i;
|
|
struct servent *s;
|
|
|
|
i=atoi(str);
|
|
if (i != 0)
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|
*port_ptr=(unsigned short)i;
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|
else
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|
{
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|
s=getservbyname(str,"tcp");
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|
if (s == NULL)
|
|
{
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|
BIO_printf(bio_err,"getservbyname failure for %s\n",str);
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|
return(0);
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|
}
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|
*port_ptr=ntohs((unsigned short)s->s_port);
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|
}
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|
return(1);
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|
}
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|
|
|
#define GHBN_NUM 4
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|
static struct ghbn_cache_st
|
|
{
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|
char name[128];
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|
struct hostent ent;
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|
unsigned long order;
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|
} ghbn_cache[GHBN_NUM];
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|
|
|
static unsigned long ghbn_hits=0L;
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|
static unsigned long ghbn_miss=0L;
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|
|
|
static struct hostent *GetHostByName(char *name)
|
|
{
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|
struct hostent *ret;
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|
int i,lowi=0;
|
|
unsigned long low= (unsigned long)-1;
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|
|
|
for (i=0; i<GHBN_NUM; i++)
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|
{
|
|
if (low > ghbn_cache[i].order)
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|
{
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|
low=ghbn_cache[i].order;
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|
lowi=i;
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|
}
|
|
if (ghbn_cache[i].order > 0)
|
|
{
|
|
if (strncmp(name,ghbn_cache[i].name,128) == 0)
|
|
break;
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|
}
|
|
}
|
|
if (i == GHBN_NUM) /* no hit*/
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|
{
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|
ghbn_miss++;
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|
ret=gethostbyname(name);
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|
if (ret == NULL) return(NULL);
|
|
/* else add to cache */
|
|
strncpy(ghbn_cache[lowi].name,name,128);
|
|
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);
|
|
}
|
|
}
|