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/*
* Copyright (C) 1997-2000 Matt Newman <matt@novadigm.com>
*
* $Header: /cvsroot/tls/tls/tlsBIO.c,v 1.8 2004/03/24 05:22:53 razzell Exp $
*
* Provides BIO layer to interface openssl to Tcl.
*/
#include "tlsInt.h"
/*
* Forward declarations
*/
static int BioWrite _ANSI_ARGS_ ((BIO *h, CONST char *buf, int num));
static int BioRead _ANSI_ARGS_ ((BIO *h, char *buf, int num));
static int BioPuts _ANSI_ARGS_ ((BIO *h, CONST char *str));
static long BioCtrl _ANSI_ARGS_ ((BIO *h, int cmd, long arg1, void *ptr));
static int BioNew _ANSI_ARGS_ ((BIO *h));
static int BioFree _ANSI_ARGS_ ((BIO *h));
static BIO_METHOD BioMethods = {
BIO_TYPE_TCL, "tcl",
BioWrite,
BioRead,
BioPuts,
NULL, /* BioGets */
BioCtrl,
BioNew,
BioFree,
};
BIO *
BIO_new_tcl(statePtr, flags)
State *statePtr;
int flags;
{
BIO *bio;
bio = BIO_new(&BioMethods);
bio->ptr = (char*)statePtr;
bio->init = 1;
bio->shutdown = flags;
return bio;
}
BIO_METHOD *
BIO_s_tcl()
{
return &BioMethods;
}
static int
BioWrite (bio, buf, bufLen)
BIO *bio;
CONST char *buf;
int bufLen;
{
Tcl_Channel chan = Tls_GetParent((State*)(bio->ptr));
int ret;
dprintf(stderr,"\nBioWrite(0x%x, <buf>, %d) [0x%x]",
(unsigned int) bio, bufLen, (unsigned int) chan);
if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
ret = Tcl_WriteRaw(chan, buf, bufLen);
} else {
ret = Tcl_Write(chan, buf, bufLen);
}
dprintf(stderr,"\n[0x%x] BioWrite(%d) -> %d [%d.%d]",
(unsigned int) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());
BIO_clear_flags(bio, BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);
if (ret == 0) {
if (!Tcl_Eof(chan)) {
BIO_set_retry_write(bio);
ret = -1;
}
}
if (BIO_should_read(bio)) {
BIO_set_retry_read(bio);
}
return ret;
}
static int
BioRead (bio, buf, bufLen)
BIO *bio;
char *buf;
int bufLen;
{
Tcl_Channel chan = Tls_GetParent((State*)bio->ptr);
int ret = 0;
dprintf(stderr,"\nBioRead(0x%x, <buf>, %d) [0x%x]",
(unsigned int) bio, bufLen, (unsigned int) chan);
if (buf == NULL) return 0;
if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
ret = Tcl_ReadRaw(chan, buf, bufLen);
} else {
ret = Tcl_Read(chan, buf, bufLen);
}
dprintf(stderr,"\n[0x%x] BioRead(%d) -> %d [%d.%d]",
(unsigned int) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());
BIO_clear_flags(bio, BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);
if (ret == 0) {
if (!Tcl_Eof(chan)) {
BIO_set_retry_read(bio);
ret = -1;
}
}
if (BIO_should_write(bio)) {
BIO_set_retry_write(bio);
}
return ret;
}
static int
BioPuts (bio, str)
BIO *bio;
CONST char *str;
{
return BioWrite(bio, str, (int) strlen(str));
}
static long
BioCtrl (bio, cmd, num, ptr)
BIO *bio;
int cmd;
long num;
void *ptr;
{
Tcl_Channel chan = Tls_GetParent((State*)bio->ptr);
long ret = 1;
int *ip;
dprintf(stderr,"\nBioCtrl(0x%x, 0x%x, 0x%x, 0x%x)",
(unsigned int) bio, (unsigned int) cmd, (unsigned int) num,
(unsigned int) ptr);
switch (cmd) {
case BIO_CTRL_RESET:
num = 0;
case BIO_C_FILE_SEEK:
case BIO_C_FILE_TELL:
ret = 0;
break;
case BIO_CTRL_INFO:
ret = 1;
break;
case BIO_C_SET_FD:
BioFree(bio);
/* Sets State* */
bio->ptr = *((char **)ptr);
bio->shutdown = (int)num;
bio->init = 1;
break;
case BIO_C_GET_FD:
if (bio->init) {
ip = (int *)ptr;
if (ip != NULL) {
*ip = bio->num;
}
ret = bio->num;
} else {
ret = -1;
}
break;
case BIO_CTRL_GET_CLOSE:
ret = bio->shutdown;
break;
case BIO_CTRL_SET_CLOSE:
bio->shutdown = (int)num;
break;
case BIO_CTRL_EOF:
dprintf(stderr, "BIO_CTRL_EOF\n");
ret = Tcl_Eof(chan);
break;
case BIO_CTRL_PENDING:
ret = (Tcl_InputBuffered(chan) ? 1 : 0);
dprintf(stderr, "BIO_CTRL_PENDING(%d)\n", (int) ret);
break;
case BIO_CTRL_WPENDING:
ret = 0;
break;
case BIO_CTRL_DUP:
break;
case BIO_CTRL_FLUSH:
dprintf(stderr, "BIO_CTRL_FLUSH\n");
if (channelTypeVersion == TLS_CHANNEL_VERSION_2) {
ret = ((Tcl_WriteRaw(chan, "", 0) >= 0) ? 1 : -1);
} else {
ret = ((Tcl_Flush(chan) == TCL_OK) ? 1 : -1);
}
break;
default:
ret = 0;
break;
}
return(ret);
}
static int
BioNew (bio)
BIO *bio;
{
bio->init = 0;
bio->num = 0;
bio->ptr = NULL;
bio->flags = 0;
return 1;
}
static int
BioFree (bio)
BIO *bio;
{
if (bio == NULL) {
return 0;
}
if (bio->shutdown) {
if (bio->init) {
/*shutdown(bio->num, 2) */
/*closesocket(bio->num) */
}
bio->init = 0;
bio->flags = 0;
bio->num = 0;
}
return 1;
}
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