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/*
* Copyright (c) 2008, 2009, 2010, 2012, 2013 Nicira, Inc.
*
* 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 "stream.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 <sys/socket.h>
#include <unistd.h>
#include "packets.h"
#include "socket-util.h"
#include "util.h"
#include "stream-provider.h"
#include "stream-fd.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(stream_tcp);
/* Active TCP. */
static int
new_tcp_stream(const char *name, int fd, int connect_status,
const struct sockaddr_in *remote, struct stream **streamp)
{
struct sockaddr_in local;
socklen_t local_len = sizeof local;
int on = 1;
int retval;
/* Get the local IP and port information */
retval = getsockname(fd, (struct sockaddr *)&local, &local_len);
if (retval) {
memset(&local, 0, sizeof local);
}
retval = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof on);
if (retval) {
VLOG_ERR("%s: setsockopt(TCP_NODELAY): %s", name, ovs_strerror(errno));
close(fd);
return errno;
}
retval = new_fd_stream(name, fd, connect_status, streamp);
if (!retval) {
struct stream *stream = *streamp;
stream_set_remote_ip(stream, remote->sin_addr.s_addr);
stream_set_remote_port(stream, remote->sin_port);
stream_set_local_ip(stream, local.sin_addr.s_addr);
stream_set_local_port(stream, local.sin_port);
}
return retval;
}
static int
tcp_open(const char *name, char *suffix, struct stream **streamp, uint8_t dscp)
{
struct sockaddr_in sin;
int fd, error;
error = inet_open_active(SOCK_STREAM, suffix, 0, &sin, &fd, dscp);
if (fd >= 0) {
return new_tcp_stream(name, fd, error, &sin, streamp);
} else {
VLOG_ERR("%s: connect: %s", name, ovs_strerror(error));
return error;
}
}
const struct stream_class tcp_stream_class = {
"tcp", /* name */
true, /* needs_probes */
tcp_open, /* open */
NULL, /* close */
NULL, /* connect */
NULL, /* recv */
NULL, /* send */
NULL, /* run */
NULL, /* run_wait */
NULL, /* wait */
};
/* Passive TCP. */
static int ptcp_accept(int fd, const struct sockaddr *sa, size_t sa_len,
struct stream **streamp);
static int
ptcp_open(const char *name OVS_UNUSED, char *suffix, struct pstream **pstreamp,
uint8_t dscp)
{
struct sockaddr_in sin;
char bound_name[128];
int error;
int fd;
fd = inet_open_passive(SOCK_STREAM, suffix, -1, &sin, dscp);
if (fd < 0) {
return -fd;
}
sprintf(bound_name, "ptcp:%"PRIu16":"IP_FMT,
ntohs(sin.sin_port), IP_ARGS(sin.sin_addr.s_addr));
error = new_fd_pstream(bound_name, fd, ptcp_accept, set_dscp, NULL,
pstreamp);
if (!error) {
pstream_set_bound_port(*pstreamp, sin.sin_port);
}
return error;
}
static int
ptcp_accept(int fd, const struct sockaddr *sa, size_t sa_len,
struct stream **streamp)
{
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.s_addr));
sprintf(strchr(name, '\0'), ":%"PRIu16, ntohs(sin->sin_port));
} else {
strcpy(name, "tcp");
}
return new_tcp_stream(name, fd, 0, sin, streamp);
}
const struct pstream_class ptcp_pstream_class = {
"ptcp",
true,
ptcp_open,
NULL,
NULL,
NULL,
NULL,
};
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