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/*
* Copyright (c) 2008, 2009 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "vconn.h"
#include <errno.h>
#include <inttypes.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "packets.h"
#include "socket-util.h"
#include "util.h"
#include "openflow/openflow.h"
#include "vconn-provider.h"
#include "vconn-stream.h"
#include "vlog.h"
#define THIS_MODULE VLM_vconn_tcp
/* Active TCP. */
static int
new_tcp_vconn(const char *name, int fd, int connect_status,
const struct sockaddr_in *sin, struct vconn **vconnp)
{
int on = 1;
int retval;
retval = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof on);
if (retval) {
VLOG_ERR("%s: setsockopt(TCP_NODELAY): %s", name, strerror(errno));
close(fd);
return errno;
}
return new_stream_vconn(name, fd, connect_status, sin->sin_addr.s_addr,
true, vconnp);
}
static int
tcp_open(const char *name, char *suffix, struct vconn **vconnp)
{
struct sockaddr_in sin;
int fd, error;
error = tcp_open_active(suffix, OFP_TCP_PORT, NULL, &fd);
if (fd >= 0) {
return new_tcp_vconn(name, fd, error, &sin, vconnp);
} else {
VLOG_ERR("%s: connect: %s", name, strerror(error));
return error;
}
}
struct vconn_class tcp_vconn_class = {
"tcp", /* name */
tcp_open, /* open */
NULL, /* close */
NULL, /* connect */
NULL, /* recv */
NULL, /* send */
NULL, /* wait */
};
/* Passive TCP. */
static int ptcp_accept(int fd, const struct sockaddr *sa, size_t sa_len,
struct vconn **vconnp);
static int
ptcp_open(const char *name UNUSED, char *suffix, struct pvconn **pvconnp)
{
int fd;
fd = tcp_open_passive(suffix, OFP_TCP_PORT);
if (fd < 0) {
return -fd;
} else {
return new_pstream_pvconn("ptcp", fd, ptcp_accept, pvconnp);
}
}
static int
ptcp_accept(int fd, const struct sockaddr *sa, size_t sa_len,
struct vconn **vconnp)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *) sa;
char name[128];
if (sa_len == sizeof(struct sockaddr_in) && sin->sin_family == AF_INET) {
sprintf(name, "tcp:"IP_FMT, IP_ARGS(&sin->sin_addr));
if (sin->sin_port != htons(OFP_TCP_PORT)) {
sprintf(strchr(name, '\0'), ":%"PRIu16, ntohs(sin->sin_port));
}
} else {
strcpy(name, "tcp");
}
return new_tcp_vconn(name, fd, 0, sin, vconnp);
}
struct pvconn_class ptcp_pvconn_class = {
"ptcp",
ptcp_open,
NULL,
NULL,
NULL
};
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