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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));
BIO *BIO_new_tcl(State *statePtr, int flags) {
BIO *bio;
Tcl_Channel parentChannel;
const Tcl_ChannelType *parentChannelType;
static BIO_METHOD *BioMethods = NULL;
void *parentChannelFdIn_p, *parentChannelFdOut_p;
int parentChannelFdIn, parentChannelFdOut, parentChannelFd;
int validParentChannelFd;
int tclGetChannelHandleRet;
dprintf("BIO_new_tcl() called");
if (BioMethods == NULL) {
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);
}
if (statePtr == NULL) {
dprintf("Asked to setup a NULL state, just creating the initial configuration");
return(NULL);
}
#ifdef TCLTLS_SSL_USE_FASTPATH
/*
* If the channel can be mapped back to a file descriptor, just use the file descriptor
* with the SSL library since it will likely be optimized for this.
*/
parentChannel = Tls_GetParent(statePtr);
parentChannelType = Tcl_GetChannelType(parentChannel);
validParentChannelFd = 0;
if (strcmp(parentChannelType->typeName, "tcp") == 0) {
tclGetChannelHandleRet = Tcl_GetChannelHandle(parentChannel, TCL_READABLE, (ClientData) &parentChannelFdIn_p);
if (tclGetChannelHandleRet == TCL_OK) {
tclGetChannelHandleRet = Tcl_GetChannelHandle(parentChannel, TCL_WRITABLE, (ClientData) &parentChannelFdOut_p);
if (tclGetChannelHandleRet == TCL_OK) {
parentChannelFdIn = PTR2INT(parentChannelFdIn_p);
parentChannelFdOut = PTR2INT(parentChannelFdOut_p);
if (parentChannelFdIn == parentChannelFdOut) {
parentChannelFd = parentChannelFdIn;
validParentChannelFd = 1;
}
}
}
}
if (validParentChannelFd) {
dprintf("We found a shortcut, this channel is backed by a file descriptor: %i", parentChannelFdIn);
bio = BIO_new(BioMethods);
bio = BIO_new_socket(parentChannelFd, flags);
return(bio);
}
dprintf("Falling back to Tcl I/O for this channel");
#endif
bio = BIO_new(BioMethods);
BIO_set_data(bio, statePtr);
BIO_set_init(bio, 1);
dprintf("BioWrite(%p, <buf>, %d) [%p]", (void *) bio, bufLen, (void *) chan);
dprintf("[chan=%p] BioWrite(%p, <buf>, %d)", (void *)chan, (void *) bio, bufLen);
ret = Tcl_WriteRaw(chan, buf, bufLen);
tclEofChan = Tcl_Eof(chan);
dprintf("[%p] BioWrite(%d) -> %d [%d.%d]", (void *) chan, bufLen, ret, Tcl_Eof(chan), Tcl_GetErrno());
if (!Tcl_Eof(chan)) {
BIO_set_retry_write(bio);
if (tclEofChan) {
dprintf("Unable to write bytes and EOF is set, returning in failure");
Tcl_SetErrno(ECONNRESET);
ret = -1;
} else {
dprintf("Unable to write bytes but we do not have EOF set... will retry");
BIO_set_retry_write(bio);
}
}
if (BIO_should_read(bio)) {
BIO_set_retry_read(bio);
}
return(ret);
}
static int BioRead(BIO *bio, char *buf, int bufLen) {
Tcl_Channel chan;
int ret = 0;
int tclEofChan;
chan = Tls_GetParent((State *) BIO_get_data(bio));
dprintf("BioRead(%p, <buf>, %d) [%p]", (void *) bio, bufLen, (void *) chan);
dprintf("[chan=%p] BioRead(%p, <buf>, %d)", (void *) chan, (void *) bio, bufLen);
if (buf == NULL) {
return 0;
}
ret = Tcl_ReadRaw(chan, buf, bufLen);
tclEofChan = Tcl_Eof(chan);
dprintf("[%p] BioRead(%d) -> %d [tclEof=%d; tclErrno=%d]", (void *) chan, bufLen, ret, tclEofChan, Tcl_GetErrno());
dprintf("[chan=%p] BioRead(%d) -> %d [tclEof=%d; tclErrno=%d]", (void *) chan, bufLen, ret, tclEofChan, Tcl_GetErrno());
BIO_clear_flags(bio, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
if (BIO_should_write(bio)) {
dprintf("Setting should retry write flag");
BIO_set_retry_write(bio);
}
if (ret == 0) {
if (!tclEofChan) {
dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is not set -- ret == -1 now");
if (tclEofChan) {
dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is set; ret = -1");
BIO_set_retry_read(bio);
dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is set");
dprintf("Got 0 from Tcl_Read or Tcl_ReadRaw, and EOF is not set; ret = 0");
dprintf("Setting retry read flag");
BIO_set_retry_read(bio);
ret = 0;
}
} else {
dprintf("Got non-zero from Tcl_Read or Tcl_ReadRaw; ret == %i", ret);
}
if (BIO_should_write(bio)) {
BIO_set_retry_write(bio);
}
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