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/*
* libvdeplug - A library to connect to a VDE Switch.
* Copyright (C) 2013-2016 Renzo Davoli, University of Bologna
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation version 2.1 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 Lesser
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libvdeplug.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <pwd.h>
#include <grp.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <netdb.h>
#include "libvdeplug_mod.h"
static VDECONN *vde_seqpacket_open(char *vde_url, char *descr, int interface_version,
struct vde_open_args *open_args);
static ssize_t vde_seqpacket_recv(VDECONN *conn, void *buf, size_t len, int flags);
static ssize_t vde_seqpacket_send(VDECONN *conn, const void *buf, size_t len, int flags);
static int vde_seqpacket_datafd(VDECONN *conn);
static int vde_seqpacket_ctlfd(VDECONN *conn);
static int vde_seqpacket_close(VDECONN *conn);
struct vdeplug_module vdeplug_ops={
.vde_open_real=vde_seqpacket_open,
.vde_recv=vde_seqpacket_recv,
.vde_send=vde_seqpacket_send,
.vde_datafd=vde_seqpacket_datafd,
.vde_ctlfd=vde_seqpacket_ctlfd,
.vde_close=vde_seqpacket_close};
struct vde_seqpacket_conn {
void *handle;
struct vdeplug_module *module;
int fddata;
};
static VDECONN *vde_seqpacket_open(char *vde_url, char *descr, int interface_version,
struct vde_open_args *open_args)
{
long fddata=-1;
struct vde_seqpacket_conn *newconn;
errno = 0;
fddata = strtol(vde_url, NULL, 0);
if (errno != 0)
return NULL;
if (fddata < 0) {
errno = EINVAL;
return NULL;
}
if ((newconn = calloc(1, sizeof(struct vde_seqpacket_conn))) == NULL) {
close(fddata);
errno = ENOMEM;
return NULL;
}
newconn->fddata=fddata;
return (VDECONN *)newconn;
}
static ssize_t vde_seqpacket_recv(VDECONN *conn, void *buf, size_t len, int flags)
{
struct vde_seqpacket_conn *vde_conn = (struct vde_seqpacket_conn *)conn;
return recv(vde_conn->fddata, buf, len, 0);
}
static ssize_t vde_seqpacket_send(VDECONN *conn, const void *buf, size_t len, int flags)
{
struct vde_seqpacket_conn *vde_conn = (struct vde_seqpacket_conn *)conn;
/* never send zero length packets */
if (__builtin_expect(len > 0, 1))
return send(vde_conn->fddata, buf, len, 0);
else
return len;
}
static int vde_seqpacket_datafd(VDECONN *conn)
{
struct vde_seqpacket_conn *vde_conn = (struct vde_seqpacket_conn *)conn;
return vde_conn->fddata;
}
static int vde_seqpacket_ctlfd(VDECONN *conn)
{
return -1;
}
static int vde_seqpacket_close(VDECONN *conn)
{
struct vde_seqpacket_conn *vde_conn = (struct vde_seqpacket_conn *)conn;
close(vde_conn->fddata);
free(vde_conn);
return 0;
}
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