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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/* imtcp.c
* This is the implementation of the TCP input module.
*
* File begun on 2007-12-21 by RGerhards (extracted from syslogd.c)
*
* Copyright 2007 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog 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 Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include "config.h"
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdarg.h>
#include <ctype.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include "rsyslog.h"
#include "syslogd.h"
#include "cfsysline.h"
#include "module-template.h"
#include "net.h"
#include "tcpsrv.h"
MODULE_TYPE_INPUT
/* static data */
DEF_IMOD_STATIC_DATA
DEFobjCurrIf(obj)
DEFobjCurrIf(tcpsrv)
DEFobjCurrIf(tcps_sess)
/* Module static data */
typedef struct _instanceData {
} instanceData;
static tcpsrv_t *pOurTcpsrv = NULL; /* our TCP server(listener) TODO: change for multiple instances */
/* config settings */
static int iTCPSessMax = 200; /* max number of sessions */
static char *TCPLstnPort = "0"; /* read-only after startup */
/* callbacks */
/* this shall go into a specific ACL module! */
static int
isPermittedHost(struct sockaddr *addr, char *fromHostFQDN)
{
return isAllowedSender(pAllowedSenders_TCP, addr, fromHostFQDN);
}
static rsRetVal
onSessAccept(tcpsrv_t *pThis, int fd)
{
DEFiRet;
tcpsrv.SessAccept(pThis, fd);
RETiRet;
}
static int
doRcvData(tcps_sess_t *pSess, char *buf, size_t lenBuf)
{
int state;
assert(pSess != NULL);
state = recv(pSess->sock, buf, lenBuf, 0);
return state;
}
static rsRetVal
onRegularClose(tcps_sess_t *pSess)
{
DEFiRet;
assert(pSess != NULL);
/* process any incomplete frames left over */
tcps_sess.PrepareClose(pSess);
/* Session closed */
tcps_sess.Close(pSess);
RETiRet;
}
static rsRetVal
onErrClose(tcps_sess_t *pSess)
{
DEFiRet;
assert(pSess != NULL);
tcps_sess.Close(pSess);
RETiRet;
}
/* ------------------------------ end callbacks ------------------------------ */
static rsRetVal addTCPListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
{
DEFiRet;
if(pOurTcpsrv == NULL) {
CHKiRet(tcpsrv.Construct(&pOurTcpsrv));
/* TODO: fill params! */
CHKiRet(tcpsrv.SetCBIsPermittedHost(pOurTcpsrv, isPermittedHost));
CHKiRet(tcpsrv.SetCBRcvData(pOurTcpsrv, doRcvData));
//CHKiRet(tcpsrv.SetCBOnListenDeinit(pOurTcpsrv, ));
CHKiRet(tcpsrv.SetCBOnSessAccept(pOurTcpsrv, onSessAccept));
CHKiRet(tcpsrv.SetCBOnRegularClose(pOurTcpsrv, onRegularClose));
CHKiRet(tcpsrv.SetCBOnErrClose(pOurTcpsrv, onErrClose));
tcpsrv.configureTCPListen(pOurTcpsrv, (char *) pNewVal);
CHKiRet(tcpsrv.ConstructFinalize(pOurTcpsrv));
}
finalize_it:
RETiRet;
}
/* This function is called to gather input.
*/
BEGINrunInput
CODESTARTrunInput
/* TODO: we must be careful to start the listener here. Currently, tcpsrv.c seems to
* do that in ConstructFinalize
*/
iRet = tcpsrv.Run(pOurTcpsrv);
return iRet;
ENDrunInput
/* initialize and return if will run or not */
BEGINwillRun
CODESTARTwillRun
/* first apply some config settings */
PrintAllowedSenders(2); /* TCP */
if(pOurTcpsrv == NULL)
ABORT_FINALIZE(RS_RET_NO_RUN);
finalize_it:
ENDwillRun
BEGINafterRun
CODESTARTafterRun
/* do cleanup here */
if (pAllowedSenders_TCP != NULL) {
clearAllowedSenders (pAllowedSenders_TCP);
pAllowedSenders_TCP = NULL;
}
ENDafterRun
BEGINmodExit
CODESTARTmodExit
iRet = tcpsrv.Destruct(&pOurTcpsrv);
#if 0 // TODO: remove
/* Close the TCP inet socket. */
if(sockTCPLstn != NULL && *sockTCPLstn) {
deinit_tcp_listener();
}
#endif
ENDmodExit
static rsRetVal
resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
{
iTCPSessMax = 200;
return RS_RET_OK;
}
BEGINfreeInstance
CODESTARTfreeInstance
ENDfreeInstance
BEGINdbgPrintInstInfo
CODESTARTdbgPrintInstInfo
ENDdbgPrintInstInfo
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_IMOD_QUERIES
ENDqueryEtryPt
BEGINmodInit()
CODESTARTmodInit
*ipIFVersProvided = 1; /* so far, we only support the initial definition */
CODEmodInit_QueryRegCFSLineHdlr
pOurTcpsrv = NULL;
/* request objects we use */
CHKiRet(objGetObjInterface(&obj)); /* get ourselves ;) */ // TODO: framework must do this
CHKiRet(objUse(tcps_sess, "tcps_sess"));
CHKiRet(objUse(tcpsrv, "tcpsrv"));
/* register config file handlers */
CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputtcpserverrun", 0, eCmdHdlrGetWord,
addTCPListener, NULL, STD_LOADABLE_MODULE_ID));
CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputtcpmaxsessions", 0, eCmdHdlrInt,
NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
ENDmodInit
/* vim:set ai:
*/
|
