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/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/endpoint/socket_utils.h"
#include <limits.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
/* set a socket to non blocking mode */
int grpc_set_socket_nonblocking(int fd, int non_blocking) {
int oldflags = fcntl(fd, F_GETFL, 0);
if (oldflags < 0) {
return 0;
}
if (non_blocking) {
oldflags |= O_NONBLOCK;
} else {
oldflags &= ~O_NONBLOCK;
}
if (fcntl(fd, F_SETFL, oldflags) != 0) {
return 0;
}
return 1;
}
/* set a socket to close on exec */
int grpc_set_socket_cloexec(int fd, int close_on_exec) {
int oldflags = fcntl(fd, F_GETFD, 0);
if (oldflags < 0) {
return 0;
}
if (close_on_exec) {
oldflags |= FD_CLOEXEC;
} else {
oldflags &= ~FD_CLOEXEC;
}
if (fcntl(fd, F_SETFD, oldflags) != 0) {
return 0;
}
return 1;
}
/* set a socket to reuse old addresses */
int grpc_set_socket_reuse_addr(int fd, int reuse) {
int val = (reuse != 0);
int newval;
socklen_t intlen = sizeof(newval);
return 0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) &&
0 == getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &newval, &intlen) &&
newval == val;
}
/* disable nagle */
int grpc_set_socket_low_latency(int fd, int low_latency) {
int val = (low_latency != 0);
int newval;
socklen_t intlen = sizeof(newval);
return 0 == setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)) &&
0 == getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &newval, &intlen) &&
newval == val;
}
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