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/*
* The contents of this file are subject to the AOLserver Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://aolserver.com/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is AOLserver Code and related documentation
* distributed by AOL.
*
* The Initial Developer of the Original Code is America Online,
* Inc. Portions created by AOL are Copyright (C) 1999 America Online,
* Inc. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License (the "GPL"), in which case the
* provisions of GPL are applicable instead of those above. If you wish
* to allow use of your version of this file only under the terms of the
* GPL and not to allow others to use your version of this file under the
* License, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the GPL.
* If you do not delete the provisions above, a recipient may use your
* version of this file under either the License or the GPL.
*/
/*
* nssock.c --
*
* Call internal Ns_DriverInit.
*
*/
#include "ns.h"
static Ns_DriverProc SockProc;
static int SockRecv(SOCKET sock, struct iovec *bufs, int nbufs);
static int SockSend(SOCKET sock, struct iovec *bufs, int nbufs);
/*
*----------------------------------------------------------------------
*
* NsSock_ModInit --
*
* Sock module init routine.
*
* Results:
* See Ns_DriverInit.
*
* Side effects:
* See Ns_DriverInit.
*
*----------------------------------------------------------------------
*/
int
NsSock_ModInit(char *server, char *module)
{
Ns_DriverInitData init;
char *path;
int async;
path = Ns_ConfigGetPath(server, module, NULL);
if (!Ns_ConfigGetBool(path, "async", &async)) {
async = 1;
}
/*
* Initialize the driver with the async option so that the driver thread
* will perform event-driven read-ahead of the request before
* passing to the connection for processing.
*/
init.version = NS_DRIVER_VERSION_1;
init.name = "nssock";
init.proc = SockProc;
init.opts = (async ? NS_DRIVER_ASYNC : 0);
init.arg = NULL;
init.path = NULL;
return Ns_DriverInit(server, module, &init);
}
/*
*----------------------------------------------------------------------
*
* SockProc --
*
* Socket driver callback proc. This driver attempts efficient
* scatter/gatter I/O if requested and only blocks for the
* driver configured time once if no bytes are available.
*
* Results:
* For close and keep, always 0. For send and recv, # of bytes
* processed or -1 on error or timeout.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
SockProc(Ns_DriverCmd cmd, Ns_Sock *sock, struct iovec *bufs, int nbufs)
{
int n;
switch (cmd) {
case DriverRecv:
n = SockRecv(sock->sock, bufs, nbufs);
if (n < 0
&& ns_sockerrno == EWOULDBLOCK
&& Ns_SockWait(sock->sock, NS_SOCK_READ, sock->driver->recvwait) == NS_OK) {
n = SockRecv(sock->sock, bufs, nbufs);
}
break;
case DriverSend:
n = SockSend(sock->sock, bufs, nbufs);
if (n < 0
&& ns_sockerrno == EWOULDBLOCK
&& Ns_SockWait(sock->sock, NS_SOCK_WRITE, sock->driver->sendwait) == NS_OK) {
n = SockSend(sock->sock, bufs, nbufs);
}
break;
case DriverKeep:
case DriverClose:
/* NB: Nothing to do. */
n = 0;
break;
default:
/* Unsupported command. */
n = -1;
break;
}
return n;
}
static int
SockRecv(SOCKET sock, struct iovec *bufs, int nbufs)
{
#ifdef _WIN32
int n, flags;
flags = 0;
if (WSARecv(sock, (LPWSABUF)bufs, nbufs, &n, &flags, NULL, NULL) != 0) {
n = -1;
}
return n;
#else
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = bufs;
msg.msg_iovlen = nbufs;
return recvmsg(sock, &msg, 0);
#endif
}
static int
SockSend(SOCKET sock, struct iovec *bufs, int nbufs)
{
#ifdef _WIN32
int n;
if (WSASend(sock, (LPWSABUF)bufs, nbufs, &n, 0, NULL, NULL) != 0) {
n = -1;
}
return n;
#else
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = bufs;
msg.msg_iovlen = nbufs;
return sendmsg(sock, &msg, 0);
#endif
}
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