1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright (c) 2002-2014 Balabit
* Copyright (c) 1998-2013 Balázs Scheidler
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "socket-options.h"
#include "messages.h"
#include <sys/types.h>
#include <sys/socket.h>
static gboolean
_setup_receive_buffer(gint fd, gint so_rcvbuf)
{
gint so_rcvbuf_set = 0;
socklen_t sz = sizeof(so_rcvbuf_set);
gint rc;
rc = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &so_rcvbuf, sizeof(so_rcvbuf));
if (rc < 0 ||
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &so_rcvbuf_set, &sz) < 0 ||
sz != sizeof(so_rcvbuf_set) ||
so_rcvbuf_set < so_rcvbuf)
{
msg_warning("The kernel refused to set the receive buffer (SO_RCVBUF) to the requested size, you probably need to adjust buffer related kernel parameters",
evt_tag_int("so_rcvbuf", so_rcvbuf),
evt_tag_int("so_rcvbuf_set", so_rcvbuf_set));
}
return TRUE;
}
static gboolean
_setup_send_buffer(gint fd, gint so_sndbuf)
{
gint so_sndbuf_set = 0;
socklen_t sz = sizeof(so_sndbuf_set);
gint rc;
rc = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &so_sndbuf, sizeof(so_sndbuf));
if (rc < 0 ||
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &so_sndbuf_set, &sz) < 0 ||
sz != sizeof(so_sndbuf_set) ||
so_sndbuf_set < so_sndbuf)
{
msg_warning("The kernel refused to set the send buffer (SO_SNDBUF) to the requested size, you probably need to adjust buffer related kernel parameters",
evt_tag_int("so_sndbuf", so_sndbuf),
evt_tag_int("so_sndbuf_set", so_sndbuf_set));
}
return TRUE;
}
static gboolean
_setup_broadcast(gint fd)
{
gint on = 1;
setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on));
return TRUE;
}
static gboolean
_setup_keepalive(gint fd)
{
gint on = 1;
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on));
return TRUE;
}
static gboolean
_setup_reuseport(gint fd)
{
#ifdef SO_REUSEPORT
gint on = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &on, sizeof(on)) < 0)
{
msg_error("The kernel refused our SO_REUSEPORT setting, which should be supported by Linux 3.9+",
evt_tag_error("error"));
return FALSE;
}
return TRUE;
#else
msg_error("You enabled so-reuseport(), but your platform does not support SO_REUSEPORT socket option, which should be supported on Linux 3.9+");
return FALSE;
#endif
}
gboolean
socket_options_setup_socket_method(SocketOptions *self, gint fd, GSockAddr *bind_addr, AFSocketDirection dir)
{
if (dir & AFSOCKET_DIR_RECV)
{
if (self->so_rcvbuf && !_setup_receive_buffer(fd, self->so_rcvbuf))
return FALSE;
if (self->so_reuseport && !_setup_reuseport(fd))
return FALSE;
}
if (dir & AFSOCKET_DIR_SEND)
{
if (self->so_sndbuf && !_setup_send_buffer(fd, self->so_sndbuf))
return FALSE;
if (self->so_broadcast && !_setup_broadcast(fd))
return FALSE;
}
if (self->so_keepalive && !_setup_keepalive(fd))
return FALSE;
return TRUE;
}
void
socket_options_init_instance(SocketOptions *self)
{
self->setup_socket = socket_options_setup_socket_method;
self->free = g_free;
}
SocketOptions *
socket_options_new(void)
{
SocketOptions *self = g_new0(SocketOptions, 1);
socket_options_init_instance(self);
return self;
}
|
