violite.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:9k
- /* 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., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, 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.
- */
- #include <global.h>
- #ifndef HAVE_VIO /* is Vio suppored by the Vio lib ? */
- #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
- #if defined(__EMX__)
- #include <sys/ioctl.h>
- #define ioctlsocket ioctl
- #endif /* defined(__EMX__) */
- #if defined(MSDOS) || defined(__WIN__)
- #ifdef __WIN__
- #undef errno
- #undef EINTR
- #undef EAGAIN
- #define errno WSAGetLastError()
- #define EINTR WSAEINTR
- #define EAGAIN WSAEINPROGRESS
- #endif /* __WIN__ */
- #define O_NONBLOCK 1 /* For emulation of fcntl() */
- #endif
- #ifndef EWOULDBLOCK
- #define EWOULDBLOCK EAGAIN
- #endif
- #ifndef __WIN__
- #define HANDLE void *
- #endif
- struct st_vio
- {
- my_socket sd; /* my_socket - real or imaginary */
- HANDLE hPipe;
- my_bool localhost; /* Are we from localhost? */
- int fcntl_mode; /* Buffered fcntl(sd,F_GETFL) */
- struct sockaddr_in local; /* Local internet address */
- struct sockaddr_in remote; /* Remote internet address */
- enum enum_vio_type type; /* Type of connection */
- char desc[30]; /* String description */
- };
- typedef void *vio_ptr;
- typedef char *vio_cstring;
- /*
- * Helper to fill most of the Vio* with defaults.
- */
- static void vio_reset(Vio* vio, enum enum_vio_type type,
- my_socket sd, HANDLE hPipe,
- my_bool localhost)
- {
- bzero((char*) vio, sizeof(*vio));
- vio->type = type;
- vio->sd = sd;
- vio->hPipe = hPipe;
- vio->localhost= localhost;
- }
- /* 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(___WIN__) && !defined(__EMX__)
- #if !defined(NO_FCNTL_NONBLOCK)
- vio->fcntl_mode = fcntl(sd, F_GETFL);
- #endif
- #else /* !defined(__WIN__) && !defined(__EMX__) */
- {
- /* set to blocking mode by default */
- ulong arg=0, r;
- r = ioctlsocket(vio->sd,FIONBIO,(void*) &arg, sizeof(arg));
- }
- #endif
- }
- DBUG_RETURN(vio);
- }
- #ifdef __WIN__
- Vio *vio_new_win32pipe(HANDLE hPipe)
- {
- Vio *vio;
- DBUG_ENTER("vio_new_handle");
- if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
- {
- 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((gptr) vio,MYF(0));
- }
- }
- int vio_errno(Vio *vio __attribute__((unused)))
- {
- return errno; /* On Win32 this mapped to WSAGetLastError() */
- }
- int vio_read(Vio * vio, gptr buf, int size)
- {
- int r;
- DBUG_ENTER("vio_read");
- DBUG_PRINT("enter", ("sd=%d, buf=%p, size=%d", vio->sd, buf, size));
- #ifdef __WIN__
- if (vio->type == VIO_TYPE_NAMEDPIPE)
- {
- DWORD length;
- if (!ReadFile(vio->hPipe, buf, size, &length, NULL))
- DBUG_RETURN(-1);
- DBUG_RETURN(length);
- }
- r = recv(vio->sd, buf, size,0);
- #else
- errno=0; /* For linux */
- r = read(vio->sd, buf, size);
- #endif /* __WIN__ */
- #ifndef DBUG_OFF
- if (r < 0)
- {
- DBUG_PRINT("error", ("Got error %d during read",errno));
- }
- #endif /* DBUG_OFF */
- DBUG_PRINT("exit", ("%d", r));
- DBUG_RETURN(r);
- }
- int vio_write(Vio * vio, const gptr buf, int size)
- {
- int r;
- DBUG_ENTER("vio_write");
- DBUG_PRINT("enter", ("sd=%d, buf=%p, size=%d", vio->sd, buf, size));
- #ifdef __WIN__
- if ( vio->type == VIO_TYPE_NAMEDPIPE)
- {
- DWORD length;
- if (!WriteFile(vio->hPipe, (char*) buf, size, &length, NULL))
- DBUG_RETURN(-1);
- DBUG_RETURN(length);
- }
- r = send(vio->sd, buf, size,0);
- #else
- r = write(vio->sd, buf, size);
- #endif /* __WIN__ */
- #ifndef DBUG_OFF
- if (r < 0)
- {
- DBUG_PRINT("error", ("Got error on write: %d",errno));
- }
- #endif /* DBUG_OFF */
- DBUG_PRINT("exit", ("%d", r));
- DBUG_RETURN(r);
- }
- int vio_blocking(Vio * vio, my_bool set_blocking_mode)
- {
- int r=0;
- DBUG_ENTER("vio_blocking");
- DBUG_PRINT("enter", ("set_blocking_mode: %d", (int) set_blocking_mode));
- #if !defined(___WIN__) && !defined(__EMX__)
- #if !defined(NO_FCNTL_NONBLOCK)
- if (vio->sd >= 0)
- {
- int old_fcntl=vio->fcntl_mode;
- if (set_blocking_mode)
- vio->fcntl_mode &= ~O_NONBLOCK; /* clear bit */
- else
- vio->fcntl_mode |= O_NONBLOCK; /* set bit */
- if (old_fcntl != vio->fcntl_mode)
- r = fcntl(vio->sd, F_SETFL, vio->fcntl_mode);
- }
- #endif /* !defined(NO_FCNTL_NONBLOCK) */
- #else /* !defined(__WIN__) && !defined(__EMX__) */
- #ifndef __EMX__
- if (vio->type != VIO_TYPE_NAMEDPIPE)
- #endif
- {
- ulong arg;
- int old_fcntl=vio->fcntl_mode;
- if (set_blocking_mode)
- {
- arg = 0;
- vio->fcntl_mode &= ~O_NONBLOCK; /* clear bit */
- }
- else
- {
- arg = 1;
- vio->fcntl_mode |= O_NONBLOCK; /* set bit */
- }
- if (old_fcntl != vio->fcntl_mode)
- r = ioctlsocket(vio->sd,FIONBIO,(void*) &arg, sizeof(arg));
- }
- #endif /* !defined(__WIN__) && !defined(__EMX__) */
- DBUG_RETURN(r);
- }
- 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
- {
- #ifndef __EMX__
- int tos = IPTOS_THROUGHPUT;
- if (!setsockopt(vio->sd, IPPROTO_IP, IP_TOS, (void *) &tos, sizeof(tos)))
- #endif /* !__EMX__ */
- {
- 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;
- }
- }
- }
- #endif /* IPTOS_THROUGHPUT */
- 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 = errno;
- return en == EAGAIN || en == EINTR || en == EWOULDBLOCK;
- }
- int vio_close(Vio * vio)
- {
- int r;
- DBUG_ENTER("vio_close");
- #ifdef __WIN__
- if (vio->type == VIO_TYPE_NAMEDPIPE)
- {
- #if defined(__NT__) && defined(MYSQL_SERVER)
- CancelIo(vio->hPipe);
- DisconnectNamedPipe(vio->hPipe);
- #endif
- r=CloseHandle(vio->hPipe);
- }
- else if (vio->type != VIO_CLOSED)
- #endif /* __WIN__ */
- {
- r=0;
- if (shutdown(vio->sd,2))
- r= -1;
- if (closesocket(vio->sd))
- r= -1;
- }
- if (r)
- {
- DBUG_PRINT("error", ("close() failed, error: %d",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
- {
- size_socket addrLen = sizeof(struct sockaddr);
- if (getpeername(vio->sd, (struct sockaddr *) (& (vio->remote)),
- &addrLen) != 0)
- {
- DBUG_PRINT("exit", ("getpeername, error: %d", 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); /* Don't return 1 on errors */
- }
- DBUG_RETURN(fds.revents & POLLIN ? 0 : 1);
- #endif
- }
- #endif /* HAVE_VIO */