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<pre class="sourcecodebox">/*
File: ioSock.h
Contains: SecureTransport sample I/O module, X sockets version
Copyright: © Copyright 2002 Apple Computer, Inc. All rights reserved.
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
("Apple") in consideration of your agreement to the following terms, and your
use, installation, modification or redistribution of this Apple software
constitutes acceptance of these terms. If you do not agree with these terms,
please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject
to these terms, Apple grants you a personal, non-exclusive license, under Apple's
copyrights in this original Apple software (the "Apple Software"), to use,
reproduce, modify and redistribute the Apple Software, with or without
modifications, in source and/or binary forms; provided that if you redistribute
the Apple Software in its entirety and without modifications, you must retain
this notice and the following text and disclaimers in all such redistributions of
the Apple Software. Neither the name, trademarks, service marks or logos of
Apple Computer, Inc. may be used to endorse or promote products derived from the
Apple Software without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or implied,
are granted by Apple herein, including but not limited to any patent rights that
may be infringed by your derivative works or by other works in which the Apple
Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Change History (most recent first):
11/4/02 1.0d1
*/
#include "ioSock.h"
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacErrors.h>
#include <time.h>
#include <strings.h>
/* debugging for this module */
#define SSL_OT_DEBUG 1
/* log errors to stdout */
#define SSL_OT_ERRLOG 1
/* trace all low-level network I/O */
#define SSL_OT_IO_TRACE 0
/* if SSL_OT_IO_TRACE, only log non-zero length transfers */
#define SSL_OT_IO_TRACE_NZ 1
/* pause after each I/O (only meaningful if SSL_OT_IO_TRACE == 1) */
#define SSL_OT_IO_PAUSE 0
/* print a stream of dots while I/O pending */
#define SSL_OT_DOT 1
/* dump some bytes of each I/O (only meaningful if SSL_OT_IO_TRACE == 1) */
#define SSL_OT_IO_DUMP 0
#define SSL_OT_IO_DUMP_SIZE 256
/* general, not-too-verbose debugging */
#if SSL_OT_DEBUG
#define dprintf(s) printf s
#else
#define dprintf(s)
#endif
/* errors --> stdout */
#if SSL_OT_ERRLOG
#define eprintf(s) printf s
#else
#define eprintf(s)
#endif
/* enable nonblocking I/O - maybe should be an arg to MakeServerConnection() */
#define NON_BLOCKING 0
/* trace completion of every r/w */
#if SSL_OT_IO_TRACE
static void tprintf(
const char *str,
UInt32 req,
UInt32 act,
const UInt8 *buf)
{
#if SSL_OT_IO_TRACE_NZ
if(act == 0) {
return;
}
#endif
printf("%s(%d): moved (%d) bytes\n", str, req, act);
#if SSL_OT_IO_DUMP
{
int i;
for(i=0; i<act; i++) {
printf("%02X ", buf[i]);
if(i >= (SSL_OT_IO_DUMP_SIZE - 1)) {
break;
}
}
printf("\n");
}
#endif
#if SSL_OT_IO_PAUSE
{
char instr[20];
printf("CR to continue: ");
gets(instr);
}
#endif
}
#else
#define tprintf(str, req, act, buf)
#endif /* SSL_OT_IO_TRACE */
/*
* If SSL_OT_DOT, output a '.' every so often while waiting for
* connection. This gives user a chance to do something else with the
* UI.
*/
#if SSL_OT_DOT
static time_t lastTime = (time_t)0;
#define TIME_INTERVAL 3
static void outputDot()
{
time_t thisTime = time(0);
if((thisTime - lastTime) >= TIME_INTERVAL) {
printf("."); fflush(stdout);
lastTime = thisTime;
}
}
#else
#define outputDot()
#endif
/*
* One-time only init.
*/
void initSslOt()
{
}
/*
* Connect to server.
*/
OSStatus MakeServerConnection(
const char *hostName,
int port,
otSocket *socketNo, // RETURNED
PeerSpec *peer) // RETURNED
{
struct sockaddr_in addr;
struct hostent *ent;
struct in_addr host;
int sock = 0;
*socketNo = NULL;
if (hostName[0] >= '0' && hostName[0] <= '9')
{
host.s_addr = inet_addr(hostName);
}
else
{ ent = gethostbyname(hostName);
if (!ent)
{ printf("gethostbyname failed\n");
return ioErr;
}
memcpy(&host, ent->h_addr, sizeof(struct in_addr));
}
sock = socket(AF_INET, SOCK_STREAM, 0);
addr.sin_addr = host;
addr.sin_port = htons((u_short)port);
addr.sin_family = AF_INET;
if (connect(sock, (struct sockaddr *) &addr, sizeof(struct sockaddr_in)) != 0)
{ printf("connect returned error\n");
return ioErr;
}
#if NON_BLOCKING
/* OK to do this after connect? */
{
int rtn = fcntl(sock, F_SETFL, O_NONBLOCK);
if(rtn == -1) {
perror("fctnl(O_NONBLOCK)");
return ioErr;
}
}
#endif /* NON_BLOCKING*/
peer->ipAddr = addr.sin_addr.s_addr;
peer->port = htons((u_short)port);
*socketNo = (otSocket)sock;
return noErr;
}
/*
* Set up an otSocket to listen for client connections. Call once, then
* use multiple AcceptClientConnection calls.
*/
OSStatus ListenForClients(
int port,
otSocket *socketNo) // RETURNED
{
struct sockaddr_in addr;
struct hostent *ent;
int len;
int sock;
sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock < 1) {
perror("socket");
return ioErr;
}
ent = gethostbyname("localhost");
if (!ent) {
perror("gethostbyname");
return ioErr;
}
memcpy(&addr.sin_addr, ent->h_addr, sizeof(struct in_addr));
addr.sin_port = htons((u_short)port);
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_family = AF_INET;
len = sizeof(struct sockaddr_in);
if (bind(sock, (struct sockaddr *) &addr, len)) {
perror("bind");
return ioErr;
}
if (listen(sock, 1)) {
perror("listen");
return ioErr;
}
*socketNo = (otSocket)sock;
return noErr;
}
/*
* Accept a client connection.
*/
/*
* Currently we always get back a different peer port number on successive
* connections, no matter what the client is doing. To test for resumable
* session support, force peer port = 0.
*/
#define FORCE_ACCEPT_PEER_PORT_ZERO 1
OSStatus AcceptClientConnection(
otSocket listenSock, // obtained from ListenForClients
otSocket *acceptSock, // RETURNED
PeerSpec *peer) // RETURNED
{
struct sockaddr_in addr;
int sock;
int len;
len = sizeof(struct sockaddr_in);
sock = accept((int)listenSock, (struct sockaddr *) &addr, &len);
if (sock < 0) {
perror("accept");
return ioErr;
}
*acceptSock = (otSocket)sock;
peer->ipAddr = addr.sin_addr.s_addr;
#if FORCE_ACCEPT_PEER_PORT_ZERO
peer->port = 0;
#else
peer->port = ntohs(addr.sin_port);
#endif
return noErr;
}
/*
* Shut down a connection.
*/
void endpointShutdown(
otSocket socket)
{
close((int)socket);
}
/*
* R/W. Called out from SSL.
*/
OSStatus SocketRead(
SSLConnectionRef connection,
void *data, /* owned by
* caller, data
* RETURNED */
size_t *dataLength) /* IN/OUT */
{
UInt32 bytesToGo = *dataLength;
UInt32 initLen = bytesToGo;
UInt8 *currData = (UInt8 *)data;
int sock = (int)connection;
OSStatus rtn = noErr;
UInt32 bytesRead;
int rrtn;
*dataLength = 0;
for(;;) {
bytesRead = 0;
rrtn = read(sock, currData, bytesToGo);
if (rrtn <= 0) {
/* this is guesswork... */
int theErr = errno;
dprintf(("SocketRead: read(%d) error %d\n", (int)bytesToGo, theErr));
#if !NON_BLOCKING
if((rrtn == 0) && (theErr == 0)) {
/* try fix for iSync */
rtn = errSSLClosedGraceful;
//rtn = errSSLClosedAbort;
}
else /* do the switch */
#endif
switch(theErr) {
case ENOENT:
/* connection closed */
rtn = errSSLClosedGraceful;
break;
case ECONNRESET:
rtn = errSSLClosedAbort;
break;
#if NON_BLOCKING
case EAGAIN:
#else
case 0: /* ??? */
#endif
rtn = errSSLWouldBlock;
break;
default:
dprintf(("SocketRead: read(%d) error %d\n",
(int)bytesToGo, theErr));
rtn = ioErr;
break;
}
break;
}
else {
bytesRead = rrtn;
}
bytesToGo -= bytesRead;
currData += bytesRead;
if(bytesToGo == 0) {
/* filled buffer with incoming data, done */
break;
}
}
*dataLength = initLen - bytesToGo;
tprintf("SocketRead", initLen, *dataLength, (UInt8 *)data);
#if SSL_OT_DOT || (SSL_OT_DEBUG && !SSL_OT_IO_TRACE)
if((rtn == 0) && (*dataLength == 0)) {
/* keep UI alive */
outputDot();
}
#endif
return rtn;
}
int oneAtATime = 0;
OSStatus SocketWrite(
SSLConnectionRef connection,
const void *data,
size_t *dataLength) /* IN/OUT */
{
UInt32 bytesSent = 0;
int sock = (int)connection;
int length;
UInt32 dataLen = *dataLength;
const UInt8 *dataPtr = (UInt8 *)data;
OSStatus ortn;
if(oneAtATime && (*dataLength > 1)) {
UInt32 i;
UInt32 outLen;
UInt32 thisMove;
outLen = 0;
for(i=0; i<dataLen; i++) {
thisMove = 1;
ortn = SocketWrite(connection, dataPtr, &thisMove);
outLen += thisMove;
dataPtr++;
if(ortn) {
return ortn;
}
}
return noErr;
}
*dataLength = 0;
do {
length = write(sock,
(char*)dataPtr + bytesSent,
dataLen - bytesSent);
} while ((length > 0) &&
( (bytesSent += length) < dataLen) );
if(length <= 0) {
if(errno == EAGAIN) {
ortn = errSSLWouldBlock;
}
else {
ortn = ioErr;
}
}
else {
ortn = noErr;
}
tprintf("SocketWrite", dataLen, bytesSent, dataPtr);
*dataLength = bytesSent;
return ortn;
}
</pre>
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