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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"
#if OPENSSL_VERSION_NUMBER < 0x10100000L
#define BIO_get_data(bio) ((bio)->ptr)
#define BIO_get_init(bio) ((bio)->init)
#define BIO_get_shutdown(bio) ((bio)->shutdown)
#define BIO_set_data(bio, val) \
(bio)->ptr = (val)
#define BIO_set_init(bio, val) \
(bio)->init = (val)
#define BIO_set_shutdown(bio, val) \
(bio)->shutdown = (val)
#endif
/*
* 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 = NULL;
BIO_METHOD *
BIO_s_tcl()
{
if (BioMethods == NULL) {
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
BioMethods = BIO_meth_new(BIO_TYPE_TCL, "tcl");
BIO_meth_set_write(BioMethods, BioWrite);
BIO_meth_set_read(BioMethods, BioRead);
BIO_meth_set_puts(BioMethods, BioPuts);
BIO_meth_set_ctrl(BioMethods, BioCtrl);
BIO_meth_set_create(BioMethods, BioNew);
BIO_meth_set_destroy(BioMethods, BioFree);
#else
BioMethods = (BIO_METHOD *)Tcl_Alloc(sizeof(BIO_METHOD));
BioMethods->type = BIO_TYPE_TCL;
BioMethods->name = "tcl";
BioMethods->bwrite = BioWrite;
BioMethods->bread = BioRead;
BioMethods->bputs = BioPuts;
BioMethods->ctrl = BioCtrl;
BioMethods->create = BioNew;
BioMethods->destroy = BioFree;
#endif
}
return BioMethods;
}
BIO *
BIO_new_tcl(statePtr, flags)
State *statePtr;
int flags;
{
BIO *bio = BIO_new(BIO_s_tcl());
BIO_set_data(bio, statePtr);
BIO_set_init(bio, 1);
BIO_set_shutdown(bio, flags);
return bio;
}
static int
BioWrite (bio, buf, bufLen)
BIO *bio;
CONST char *buf;
int bufLen;
{
Tcl_Channel chan = Tls_GetParent((State*)BIO_get_data(bio));
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_get_data(bio));
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_get_data(bio));
long ret = 1;
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_CTRL_GET_CLOSE:
ret = BIO_get_shutdown(bio);
break;
case BIO_CTRL_SET_CLOSE:
BIO_set_shutdown(bio, (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_set_init(bio, 0);
BIO_set_data(bio, NULL);
BIO_clear_flags(bio, -1);
return 1;
}
static int
BioFree (bio)
BIO *bio;
{
if (bio == NULL) {
return 0;
}
if (BIO_get_shutdown(bio)) {
if (BIO_get_init(bio)) {
/*shutdown(bio->num, 2) */
/*closesocket(bio->num) */
}
BIO_set_init(bio, 0);
BIO_clear_flags(bio, -1);
}
return 1;
}
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