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