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
143
|
/*
* Copyright (c) 2002-2012 BalaBit IT Ltd, Budapest, Hungary
* Copyright (c) 1998-2012 Balázs Scheidler
*
* 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; either
* 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
*
* 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 "logmpx.h"
void
log_multiplexer_add_next_hop(LogMultiplexer *self, LogPipe *next_hop)
{
g_ptr_array_add(self->next_hops, next_hop);
}
static gboolean
log_multiplexer_init(LogPipe *s)
{
LogMultiplexer *self = (LogMultiplexer *) s;
gint i;
for (i = 0; i < self->next_hops->len; i++)
{
LogPipe *branch_head = g_ptr_array_index(self->next_hops, i);
LogPipe *p;
for (p = branch_head; p; p = p->pipe_next)
{
branch_head->flags |= (p->flags & PIF_BRANCH_PROPERTIES);
}
if (branch_head->flags & PIF_BRANCH_FALLBACK)
{
self->fallback_exists = TRUE;
}
}
return TRUE;
}
static gboolean
log_multiplexer_deinit(LogPipe *self)
{
return TRUE;
}
static void
log_multiplexer_queue(LogPipe *s, LogMessage *msg, const LogPathOptions *path_options, gpointer user_data)
{
LogMultiplexer *self = (LogMultiplexer *) s;
gint i;
LogPathOptions local_options = *path_options;
gboolean matched;
gboolean delivered = FALSE;
gboolean last_delivery;
gint fallback;
local_options.matched = &matched;
for (fallback = 0; (fallback == 0) || (fallback == 1 && self->fallback_exists && !delivered); fallback++)
{
for (i = 0; i < self->next_hops->len; i++)
{
LogPipe *next_hop = g_ptr_array_index(self->next_hops, i);
if (G_UNLIKELY(fallback == 0 && (next_hop->flags & PIF_BRANCH_FALLBACK) != 0))
{
continue;
}
else if (G_UNLIKELY(fallback && (next_hop->flags & PIF_BRANCH_FALLBACK) == 0))
{
continue;
}
matched = TRUE;
log_msg_add_ack(msg, &local_options);
/* NOTE: this variable indicates that the upcoming message
* delivery is the last one, thus we don't need to retain an an
* unmodified copy to be sent to further paths. The current
* delivery may modify the message at will.
*/
last_delivery = (self->super.pipe_next == NULL) &&
(i == self->next_hops->len - 1) &&
(!self->fallback_exists || delivered || fallback == 1);
if (!last_delivery)
log_msg_write_protect(msg);
log_pipe_queue(next_hop, log_msg_ref(msg), &local_options);
if (!last_delivery)
log_msg_write_unprotect(msg);
if (matched)
{
delivered = TRUE;
if (G_UNLIKELY(next_hop->flags & PIF_BRANCH_FINAL))
break;
}
}
}
log_pipe_forward_msg(s, msg, path_options);
}
static void
log_multiplexer_free(LogPipe *s)
{
LogMultiplexer *self = (LogMultiplexer *) s;
g_ptr_array_free(self->next_hops, TRUE);
log_pipe_free_method(s);
}
LogMultiplexer *
log_multiplexer_new(guint32 flags)
{
LogMultiplexer *self = g_new0(LogMultiplexer, 1);
log_pipe_init_instance(&self->super);
self->super.init = log_multiplexer_init;
self->super.deinit = log_multiplexer_deinit;
self->super.queue = log_multiplexer_queue;
self->super.free_fn = log_multiplexer_free;
self->next_hops = g_ptr_array_new();
self->super.flags = flags;
return self;
}
|