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Fixed SSL_accept failing if the GWBUF with the initial MySQL auth packet contains some of the SSL authentication data.

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This commit is contained in:
Markus Makela
2015-06-09 22:27:15 +03:00
parent 196d41cb88
commit de2910f75b
3 changed files with 150 additions and 1 deletions
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144
server/core/dcb.c
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@ -883,6 +883,150 @@ return_n:
}
/**
* General purpose read routine to read data from a socket in the
* Descriptor Control Block and append it to a linked list of buffers.
* The list may be empty, in which case *head == NULL
*
* @param dcb The DCB to read from
* @param head Pointer to linked list to append data to
* @return -1 on error, otherwise the number of read bytes on the last
* iteration of while loop. 0 is returned if no data available.
*/
int dcb_read_n(
DCB *dcb,
GWBUF **head,
int nbytes)
{
GWBUF *buffer = NULL;
int b;
int rc;
int n;
int nread = 0;
CHK_DCB(dcb);
if (dcb->fd <= 0)
{
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : Read failed, dcb is %s.",
dcb->fd == DCBFD_CLOSED ? "closed" : "cloned, not readable")));
n = 0;
goto return_n;
}
int bufsize;
rc = ioctl(dcb->fd, FIONREAD, &b);
if (rc == -1)
{
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : ioctl FIONREAD for dcb %p in "
"state %s fd %d failed due error %d, %s.",
dcb,
STRDCBSTATE(dcb->state),
dcb->fd,
errno,
strerror(errno))));
n = -1;
goto return_n;
}
if (b == 0 && nread == 0)
{
/** Handle closed client socket */
if (dcb_isclient(dcb))
{
char c;
int l_errno = 0;
int r = -1;
/* try to read 1 byte, without consuming the socket buffer */
r = recv(dcb->fd, &c, sizeof(char), MSG_PEEK);
l_errno = errno;
if (r <= 0 &&
l_errno != EAGAIN &&
l_errno != EWOULDBLOCK &&
l_errno != 0)
{
n = -1;
goto return_n;
}
}
n = 0;
goto return_n;
}
else if (b == 0)
{
n = 0;
goto return_n;
}
dcb->last_read = hkheartbeat;
bufsize = MIN(b, nbytes);
if ((buffer = gwbuf_alloc(bufsize)) == NULL)
{
/*<
* This is a fatal error which should cause shutdown.
* Todo shutdown if memory allocation fails.
*/
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : Failed to allocate read buffer "
"for dcb %p fd %d, due %d, %s.",
dcb,
dcb->fd,
errno,
strerror(errno))));
n = -1;
goto return_n;
}
GW_NOINTR_CALL(n = read(dcb->fd, GWBUF_DATA(buffer), bufsize);
dcb->stats.n_reads++);
if (n <= 0)
{
if (errno != 0 && errno != EAGAIN && errno != EWOULDBLOCK)
{
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : Read failed, dcb %p in state "
"%s fd %d, due %d, %s.",
dcb,
STRDCBSTATE(dcb->state),
dcb->fd,
errno,
strerror(errno))));
}
gwbuf_free(buffer);
goto return_n;
}
nread += n;
LOGIF(LD, (skygw_log_write(
LOGFILE_DEBUG,
"%lu [dcb_read] Read %d bytes from dcb %p in state %s "
"fd %d.",
pthread_self(),
n,
dcb,
STRDCBSTATE(dcb->state),
dcb->fd)));
/*< Append read data to the gwbuf */
*head = gwbuf_append(*head, buffer);
return_n:
return n;
}
/**
* General purpose read routine to read data from a socket in the
* Descriptor Control Block and append it to a linked list of buffers.