Integrate MySQL module.

module/Vendor/MDBC/libmariadb/violite.c

@@ -0,0 +1,709 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02111-1301, USA */
+
+/*
+  Note that we can't have assertion on file descriptors;  The reason for
+  this is that during mysql shutdown, another thread can close a file
+  we are working on.  In this case we should just return read errors from
+  the file descriptior.
+*/
+
+#ifndef HAVE_VIO /* is Vio suppored by the Vio lib ? */
+
+#include <my_global.h>
+#include <errno.h>
+#include <assert.h>
+#include <violite.h>
+#include <my_sys.h>
+#include <my_net.h>
+#include <m_string.h>
+#ifdef HAVE_POLL
+#include <sys/poll.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_OPENSSL
+#include <ma_secure.h>
+#endif
+
+#ifdef _WIN32
+#define socklen_t int
+#pragma comment (lib, "ws2_32")
+#endif
+
+#if !defined(_WIN32) && !defined(HAVE_BROKEN_NETINET_INCLUDES)  
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#if !defined(alpha_linux_port)
+#include <netinet/tcp.h>
+#endif
+#endif
+
+#if defined(__EMX__) || defined(OS2)
+#define ioctlsocket ioctl
+#endif /* defined(__EMX__) */
+
+#if defined(MSDOS) || defined(_WIN32)
+#define O_NONBLOCK 1    /* For emulation of fcntl() */
+#endif
+#ifndef EWOULDBLOCK
+#define SOCKET_EWOULDBLOCK SOCKET_EAGAIN
+#endif
+
+#include <mysql_async.h>
+#include <my_context.h>
+
+#ifdef _WIN32
+#define ma_get_error() WSAGetLastError()
+#else
+#define ma_get_error() errno
+#endif
+
+typedef void *vio_ptr;
+typedef char *vio_cstring;
+
+/*
+ * Helper to fill most of the Vio* with defaults.
+ */
+
+void vio_reset(Vio* vio, enum enum_vio_type type,
+               my_socket sd, HANDLE hPipe,
+               my_bool localhost)
+{
+  uchar *save_cache= vio->cache;
+  int save_timeouts[2]= {vio->read_timeout, vio->write_timeout};
+  bzero((char*) vio, sizeof(*vio));
+  vio->type= type;
+  vio->sd= sd;
+  vio->hPipe= hPipe;
+  vio->localhost= localhost;
+  /* do not clear cache */
+  vio->cache= vio->cache_pos= save_cache;
+  vio->cache_size= 0;
+  vio->read_timeout= save_timeouts[0];
+  vio->write_timeout= save_timeouts[1];
+}
+
+void vio_timeout(Vio *vio, int type, uint timeval)
+{
+#ifdef _WIN32
+  uint timeout= timeval; /* milli secs */
+#else
+  struct timeval timeout;
+  timeout.tv_sec= timeval / 1000;
+  timeout.tv_usec= (timeval % 1000) * 1000;
+#endif
+
+  if (setsockopt(vio->sd, SOL_SOCKET, type,
+#ifdef _WIN32
+                (const char *)&timeout,
+#else
+                (const void *)&timeout,
+#endif
+                sizeof(timeout)))
+  {
+    DBUG_PRINT("error", ("setsockopt failed. Errno: %d", errno));
+  }
+}
+
+void vio_read_timeout(Vio *vio, uint timeout)
+{
+  vio->read_timeout= timeout * 1000;
+  vio_timeout(vio, SO_RCVTIMEO, vio->read_timeout);
+}
+
+void vio_write_timeout(Vio *vio, uint timeout)
+{
+  vio->write_timeout= timeout * 1000;
+  vio_timeout(vio, SO_SNDTIMEO, vio->write_timeout);
+}
+
+/* Open the socket or TCP/IP connection and read the fnctl() status */
+
+Vio *vio_new(my_socket sd, enum enum_vio_type type, my_bool localhost)
+{
+  Vio *vio;
+  DBUG_ENTER("vio_new");
+  DBUG_PRINT("enter", ("sd=%d", sd));
+  if ((vio = (Vio*) my_malloc(sizeof(*vio),MYF(MY_WME))))
+  {
+    vio_reset(vio, type, sd, 0, localhost);
+    sprintf(vio->desc,
+            (vio->type == VIO_TYPE_SOCKET ? "socket (%d)" : "TCP/IP (%d)"),
+             vio->sd);
+#if !defined(__WIN32) && !defined(__EMX__) && !defined(OS2)
+#if !defined(NO_FCNTL_NONBLOCK)
+    vio->fcntl_mode = fcntl(sd, F_GETFL);
+#elif defined(HAVE_SYS_IOCTL_H) /* hpux */
+    /* Non blocking sockets doesn't work good on HPUX 11.0 */
+    (void) ioctl(sd,FIOSNBIO,0);
+#endif
+#else /* !defined(_WIN32) && !defined(__EMX__) */
+    {
+      /* set to blocking mode by default */
+      ulong arg=0, r;
+      r = ioctlsocket(vio->sd,FIONBIO,(void*) &arg/*, sizeof(arg)*/);
+    }
+#endif
+  }
+  if (!(vio->cache= my_malloc(VIO_CACHE_SIZE, MYF(MY_ZEROFILL))))
+  {
+    my_free(vio);
+    vio= NULL;
+  }
+  vio->cache_size= 0;
+  vio->cache_pos= vio->cache;
+  DBUG_RETURN(vio);
+}
+
+
+#ifdef _WIN32
+
+Vio *vio_new_win32pipe(HANDLE hPipe)
+{
+  Vio *vio;
+  DBUG_ENTER("vio_new_handle");
+  if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_ZEROFILL))))
+  {
+    vio_reset(vio, VIO_TYPE_NAMEDPIPE, 0, hPipe, TRUE);
+    strmov(vio->desc, "named pipe");
+  }
+  DBUG_RETURN(vio);
+}
+
+#endif
+
+void vio_delete(Vio * vio)
+{
+  /* It must be safe to delete null pointers. */
+  /* This matches the semantics of C++'s delete operator. */
+  if (vio)
+  {
+    if (vio->type != VIO_CLOSED)
+      vio_close(vio);
+    my_free(vio->cache);
+    my_free(vio);
+  }
+}
+
+int vio_errno(Vio *vio __attribute__((unused)))
+{
+  return socket_errno; /* On Win32 this mapped to WSAGetLastError() */
+}
+
+int vio_wait_or_timeout(Vio *vio, my_bool is_read, int timeout)
+{
+  int rc;
+#ifndef _WIN32
+  struct pollfd p_fd;
+#else
+  struct timeval tv= {0,0};
+  fd_set fds, exc_fds;
+#endif
+
+  if (!timeout)
+    timeout= -1;
+
+  /* we don't support it via named pipes yet.
+   * maybe this could be handled via PeekNamedPipe somehow !? */
+  if (vio->type == VIO_TYPE_NAMEDPIPE)
+    return 1;
+
+  /*
+    Note that if zero timeout, then we will not block, so we do not need to
+    yield to calling application in the async case.
+  */
+  if (timeout != 0 && vio->async_context && vio->async_context->active)
+  {
+    rc= my_io_wait_async(vio->async_context,
+                         (is_read) ? VIO_IO_EVENT_READ : VIO_IO_EVENT_WRITE,
+                         timeout);
+    return(rc);
+  }
+  else
+  {
+#ifndef _WIN32
+    memset(&p_fd, 0, sizeof(p_fd));
+    p_fd.fd= vio->sd;
+    p_fd.events= (is_read) ? POLLIN : POLLOUT;
+
+    do {
+      rc= poll(&p_fd, 1, timeout);
+    } while (rc == -1 && errno == EINTR);
+
+    if (rc == 0)
+      errno= ETIMEDOUT;
+#else
+    FD_ZERO(&fds);
+    FD_ZERO(&exc_fds);
+
+    FD_SET(vio->sd, &fds);
+    FD_SET(vio->sd, &exc_fds);
+
+    if (timeout >= 0)
+    {
+      tv.tv_sec= timeout / 1000;
+      tv.tv_usec= (timeout % 1000) * 1000;
+    }
+
+    rc= select(0, (is_read) ? &fds : NULL,
+                  (is_read) ? NULL : &fds,
+                  &exc_fds, 
+                  (timeout >= 0) ? &tv : NULL);
+    if (rc == SOCKET_ERROR)
+      errno= WSAGetLastError();
+    if (rc == 0)
+      errno= ETIMEDOUT;
+#endif
+  }
+  return rc;
+}
+
+
+size_t vio_real_read(Vio *vio, gptr buf, size_t size)
+{
+  size_t r;
+
+  switch(vio->type) {
+#ifdef HAVE_OPENSSL
+  case VIO_TYPE_SSL:
+    return my_ssl_read(vio, (char *)buf, size);
+    break;
+#endif
+#ifdef _WIN32
+  case VIO_TYPE_NAMEDPIPE:
+    {
+      DWORD length= 0;
+      if (!ReadFile(vio->hPipe, buf, (DWORD)size, &length, NULL))
+        return -1;
+      return length;
+    }
+    break;
+#endif
+  default:
+    if (vio->async_context && vio->async_context->active)
+      r= my_recv_async(vio->async_context,
+                       vio->sd,
+                       buf, size, vio->read_timeout);
+    else
+    {
+      if (vio->async_context)
+      {
+        /*
+          If switching from non-blocking to blocking API usage, set the socket
+          back to blocking mode.
+        */
+        my_bool old_mode;
+        vio_blocking(vio, TRUE, &old_mode);
+      }
+#ifndef _WIN32
+      if (vio_wait_or_timeout(vio, TRUE, vio->read_timeout) < 1)
+      {
+        return -1;
+      }
+      do {
+        r= recv(vio->sd, buf, size, 0);
+      } while (r == -1 && errno == EINTR);
+#else
+      {
+        WSABUF wsaData;
+        DWORD dwBytes = 0;
+        DWORD flags = 0;
+
+        wsaData.len= size;
+        wsaData.buf= buf;
+
+        if (WSARecv(vio->sd, &wsaData, 1, &dwBytes, &flags, NULL, NULL) == SOCKET_ERROR)
+        {
+          errno= WSAGetLastError();
+          return 0;
+        }
+        r= (size_t)dwBytes;
+      }
+#endif
+    }
+    break;
+  }
+  return r;
+}
+
+
+size_t vio_read(Vio * vio, gptr buf, size_t size)
+{
+  size_t r;
+  DBUG_ENTER("vio_read");
+  DBUG_PRINT("enter", ("sd=%d  size=%d", vio->sd, size));
+
+  if (!vio->cache)
+    DBUG_RETURN(vio_real_read(vio, buf, size));
+
+  if (vio->cache + vio->cache_size > vio->cache_pos)
+  {
+    r= MIN(size, (size_t)(vio->cache + vio->cache_size - vio->cache_pos));
+    memcpy(buf, vio->cache_pos, r);
+    vio->cache_pos+= r;
+  }
+  else if (size >= VIO_CACHE_MIN_SIZE)
+  {
+    r= vio_real_read(vio, buf, size); 
+  }
+  else
+  {
+    r= vio_real_read(vio, vio->cache, VIO_CACHE_SIZE);
+    if ((ssize_t)r > 0)
+    {
+      if (size < r)
+      {
+        vio->cache_size= r; /* might be < VIO_CACHE_SIZE */
+        vio->cache_pos= vio->cache + size;
+        r= size;
+      }
+      memcpy(buf, vio->cache, r);
+    }
+  } 
+
+#ifndef DBUG_OFF
+  if ((ssize_t)r == -1)
+  {
+    DBUG_PRINT("vio_error", ("Got error %d during read",socket_errno));
+  }
+#endif /* DBUG_OFF */
+  DBUG_PRINT("exit", ("%u", (uint)r));
+  DBUG_RETURN(r);
+}
+
+/*
+ Return data from the beginning of the receive queue without removing 
+ that data from the queue. A subsequent receive call will return the same data.
+*/
+my_bool vio_read_peek(Vio *vio, size_t *bytes)
+{
+#ifdef _WIN32
+  if (ioctlsocket(vio->sd, FIONREAD, (unsigned long*)bytes))
+    return TRUE;
+#else
+  char buffer[1024];
+  ssize_t length;
+
+  vio_blocking(vio, 0, 0);
+  length= recv(vio->sd, &buffer, sizeof(buffer), MSG_PEEK);
+  if (length < 0)
+    return TRUE;
+  *bytes= length; 
+#endif 
+  return FALSE;
+}
+
+
+size_t vio_write(Vio * vio, const gptr buf, size_t size)
+{
+  size_t r;
+  DBUG_ENTER("vio_write");
+  DBUG_PRINT("enter", ("sd=%d  size=%d", vio->sd, size));
+#ifdef HAVE_OPENSSL
+  if (vio->type == VIO_TYPE_SSL)
+  {
+    r= my_ssl_write(vio, (uchar *)buf, size);
+    DBUG_RETURN(r); 
+  }
+#endif
+#ifdef _WIN32
+  if ( vio->type == VIO_TYPE_NAMEDPIPE)
+  {
+    DWORD length;
+    if (!WriteFile(vio->hPipe, (char*) buf, (DWORD)size, &length, NULL))
+      DBUG_RETURN(-1);
+    DBUG_RETURN(length);
+  }
+#endif
+  if (vio->async_context && vio->async_context->active)
+    r= my_send_async(vio->async_context, vio->sd, buf, size,
+                     vio->write_timeout);
+  else
+  {
+    if (vio->async_context)
+    {
+      /*
+        If switching from non-blocking to blocking API usage, set the socket
+        back to blocking mode.
+      */
+      my_bool old_mode;
+      vio_blocking(vio, TRUE, &old_mode);
+    }
+#ifndef _WIN32
+    do {
+      r= send(vio->sd, buf, size, vio->write_timeout ? MSG_DONTWAIT : MSG_WAITALL);
+    } while (r == -1 && errno == EINTR);
+
+    while (r == -1 && (errno == EAGAIN || errno == EWOULDBLOCK) &&
+           vio->write_timeout > 0)
+    {
+      if (vio_wait_or_timeout(vio, FALSE, vio->write_timeout) < 1)
+        return 0;
+      do {
+        r= send(vio->sd, buf, size, vio->write_timeout ? MSG_DONTWAIT : MSG_WAITALL);
+      } while (r == -1 && errno == EINTR);
+    }
+#else
+    {
+      WSABUF wsaData;
+      DWORD dwBytes = 0;
+
+      wsaData.len= size;
+      wsaData.buf= (char *)buf;
+
+      if (WSASend(vio->sd, &wsaData, 1, &dwBytes, 0, NULL, NULL) == SOCKET_ERROR)
+      {
+        errno= WSAGetLastError();
+        DBUG_RETURN(0);
+      }
+      r= (size_t)dwBytes;
+    }
+#endif
+  }
+#ifndef DBUG_OFF
+  if ((size_t)r == -1)
+  {
+    DBUG_PRINT("vio_error", ("Got error on write: %d",socket_errno));
+  }
+#endif /* DBUG_OFF */
+  DBUG_PRINT("exit", ("%u", (uint)r));
+  DBUG_RETURN(r);
+}
+
+
+int vio_blocking(Vio *vio, my_bool block, my_bool *previous_mode)
+{
+  int *sd_flags= &vio->fcntl_mode;
+  int save_flags= vio->fcntl_mode;
+  my_bool tmp;
+  my_socket sock= vio->sd;
+
+  if (vio->type == VIO_TYPE_NAMEDPIPE)
+    return 0;
+
+  if (!previous_mode)
+    previous_mode= &tmp;
+
+#ifdef _WIN32
+  *previous_mode= (*sd_flags & O_NONBLOCK) != 0;
+  *sd_flags = (block) ? *sd_flags & ~O_NONBLOCK : *sd_flags | O_NONBLOCK;
+  {
+    ulong arg= 1 - block;
+    if (ioctlsocket(sock, FIONBIO, (void *)&arg))
+    {
+      vio->fcntl_mode= save_flags;
+      return(WSAGetLastError());
+    }
+  }
+#else
+#if defined(O_NONBLOCK)
+  *previous_mode= (*sd_flags & O_NONBLOCK) != 0;
+  *sd_flags = (block) ? *sd_flags & ~O_NONBLOCK : *sd_flags | O_NONBLOCK;
+#elif defined(O_NDELAY)
+  *previous_mode= (*sd_flags & O_NODELAY) != 0;
+  *sd_flags = (block) ? *sd_flags & ~O_NODELAY : *sd_flags | O_NODELAY;
+#elif defined(FNDELAY)
+  *previous_mode= (*sd_flags & O_FNDELAY) != 0;
+  *sd_flags = (block) ? *sd_flags & ~O_FNDELAY : *sd_flags | O_FNDELAY;
+#else
+#error socket blocking is not supported on this platform
+#endif
+  if (fcntl(sock, F_SETFL, *sd_flags) == -1)
+  {
+    vio->fcntl_mode= save_flags;
+    return errno;
+  }
+#endif
+  return 0;
+}
+
+my_bool
+vio_is_blocking(Vio * vio)
+{
+  my_bool r;
+  DBUG_ENTER("vio_is_blocking");
+  r = !(vio->fcntl_mode & O_NONBLOCK);
+  DBUG_PRINT("exit", ("%d", (int) r));
+  DBUG_RETURN(r);
+}
+
+
+int vio_fastsend(Vio * vio __attribute__((unused)))
+{
+  int r=0;
+  DBUG_ENTER("vio_fastsend");
+
+  {
+#ifdef IPTOS_THROUGHPUT
+    int tos = IPTOS_THROUGHPUT;
+    if (!setsockopt(vio->sd, IPPROTO_IP, IP_TOS, (void *) &tos, sizeof(tos)))
+#endif /* IPTOS_THROUGHPUT */
+    {
+      int nodelay = 1;
+      if (setsockopt(vio->sd, IPPROTO_TCP, TCP_NODELAY, (void *) &nodelay,
+                     sizeof(nodelay))) {
+        DBUG_PRINT("warning",
+                   ("Couldn't set socket option for fast send"));
+        r= -1;
+      }
+    }
+  }
+  DBUG_PRINT("exit", ("%d", r));
+  DBUG_RETURN(r);
+}
+
+int vio_keepalive(Vio* vio, my_bool set_keep_alive)
+{
+  int r=0;
+  uint opt = 0;
+  DBUG_ENTER("vio_keepalive");
+  DBUG_PRINT("enter", ("sd=%d  set_keep_alive=%d", vio->sd, (int)
+              set_keep_alive));
+  if (vio->type != VIO_TYPE_NAMEDPIPE)
+  {
+    if (set_keep_alive)
+      opt = 1;
+    r = setsockopt(vio->sd, SOL_SOCKET, SO_KEEPALIVE, (char *) &opt,
+                   sizeof(opt));
+  }
+  DBUG_RETURN(r);
+}
+
+
+my_bool
+vio_should_retry(Vio * vio __attribute__((unused)))
+{
+  int en = socket_errno;
+  return en == SOCKET_EAGAIN || en == SOCKET_EINTR || en == SOCKET_EWOULDBLOCK;
+}
+
+
+int vio_close(Vio * vio)
+{
+  int r;
+  DBUG_ENTER("vio_close");
+#ifdef HAVE_OPENSSL
+  if (vio->type == VIO_TYPE_SSL)
+  {
+    r = my_ssl_close(vio);
+  }
+#endif
+#ifdef _WIN32
+  if (vio->type == VIO_TYPE_NAMEDPIPE)
+  {
+    r=CloseHandle(vio->hPipe);
+  }
+  else if (vio->type != VIO_CLOSED)
+#endif /* _WIN32 */
+  {
+    r=0;
+    if (shutdown(vio->sd,2))
+      r= -1;
+    if (closesocket(vio->sd))
+      r= -1;
+  }
+  if (r)
+  {
+    DBUG_PRINT("vio_error", ("close() failed, error: %d",socket_errno));
+    /* FIXME: error handling (not critical for MySQL) */
+  }
+  vio->type= VIO_CLOSED;
+  vio->sd=   -1;
+  DBUG_RETURN(r);
+}
+
+
+const char *vio_description(Vio * vio)
+{
+  return vio->desc;
+}
+
+enum enum_vio_type vio_type(Vio* vio)
+{
+  return vio->type;
+}
+
+my_socket vio_fd(Vio* vio)
+{
+  return vio->sd;
+}
+
+
+my_bool vio_peer_addr(Vio * vio, char *buf)
+{
+  DBUG_ENTER("vio_peer_addr");
+  DBUG_PRINT("enter", ("sd=%d", vio->sd));
+  if (vio->localhost)
+  {
+    strmov(buf,"127.0.0.1");
+  }
+  else
+  {
+    socklen_t addrLen = sizeof(struct sockaddr);
+    if (getpeername(vio->sd, (struct sockaddr *) (& (vio->remote)),
+        &addrLen) != 0)
+    {
+      DBUG_PRINT("exit", ("getpeername, error: %d", socket_errno));
+      DBUG_RETURN(1);
+    }
+    my_inet_ntoa(vio->remote.sin_addr,buf);
+  }
+  DBUG_PRINT("exit", ("addr=%s", buf));
+  DBUG_RETURN(0);
+}
+
+
+void vio_in_addr(Vio *vio, struct in_addr *in)
+{
+  DBUG_ENTER("vio_in_addr");
+  if (vio->localhost)
+    bzero((char*) in, sizeof(*in)); /* This should never be executed */
+  else
+    *in=vio->remote.sin_addr;
+  DBUG_VOID_RETURN;
+}
+
+
+/* Return 0 if there is data to be read */
+/*
+my_bool vio_poll_read(Vio *vio,uint timeout)
+{
+#ifndef HAVE_POLL
+  return 0;
+#else
+  struct pollfd fds;
+  int res;
+  DBUG_ENTER("vio_poll");
+  fds.fd=vio->sd;
+  fds.events=POLLIN;
+  fds.revents=0;
+  if ((res=poll(&fds,1,(int) timeout*1000)) <= 0)
+  {
+    DBUG_RETURN(res < 0 ? 0 : 1); 
+  }
+  DBUG_RETURN(fds.revents & POLLIN ? 0 : 1);
+#endif
+}
+*/
+
+#endif /* HAVE_VIO */