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
|
/* Definitions for tcpsrv class.
*
* Copyright 2008-2012 Adiscon GmbH.
*
* This file is part of rsyslog.
*
* 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
* -or-
* see COPYING.ASL20 in the source distribution
*
* 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.
*/
#ifndef INCLUDED_TCPSRV_H
#define INCLUDED_TCPSRV_H
#include "obj.h"
#include "prop.h"
#include "tcps_sess.h"
#include "statsobj.h"
/* support for framing anomalies */
typedef enum ETCPsyslogFramingAnomaly {
frame_normal = 0,
frame_NetScreen = 1,
frame_CiscoIOS = 2
} eTCPsyslogFramingAnomaly;
/* list of tcp listen ports */
struct tcpLstnPortList_s {
uchar *pszPort; /**< the ports the listener shall listen on */
prop_t *pInputName;
tcpsrv_t *pSrv; /**< pointer to higher-level server instance */
ruleset_t *pRuleset; /**< associated ruleset */
statsobj_t *stats; /**< associated stats object */
STATSCOUNTER_DEF(ctrSubmit, mutCtrSubmit)
tcpLstnPortList_t *pNext; /**< next port or NULL */
};
#define TCPSRV_NO_ADDTL_DELIMITER -1 /* specifies that no additional delimiter is to be used in TCP framing */
/* the tcpsrv object */
struct tcpsrv_s {
BEGINobjInstance; /**< Data to implement generic object - MUST be the first data element! */
int bUseKeepAlive; /**< use socket layer KEEPALIVE handling? */
netstrms_t *pNS; /**< pointer to network stream subsystem */
int iDrvrMode; /**< mode of the stream driver to use */
uchar *pszDrvrAuthMode; /**< auth mode of the stream driver to use */
uchar *pszInputName; /**< value to be used as input name */
ruleset_t *pRuleset; /**< ruleset to bind to */
permittedPeers_t *pPermPeers;/**< driver's permitted peers */
sbool bEmitMsgOnClose; /**< emit an informational message when the remote peer closes connection */
sbool bUsingEPoll; /**< are we in epoll mode (means we do not need to keep track of sessions!) */
sbool bUseFlowControl; /**< use flow control (make light delayable) */
int iLstnCurr; /**< max nbr of listeners currently supported */
netstrm_t **ppLstn; /**< our netstream listners */
tcpLstnPortList_t **ppLstnPort; /**< pointer to relevant listen port description */
int iLstnMax; /**< max number of listners supported */
int iSessMax; /**< max number of sessions supported */
tcpLstnPortList_t *pLstnPorts; /**< head pointer for listen ports */
int addtlFrameDelim; /**< additional frame delimiter for plain TCP syslog framing (e.g. to handle NetScreen) */
int bDisableLFDelim; /**< if 1, standard LF frame delimiter is disabled (*very dangerous*) */
tcps_sess_t **pSessions;/**< array of all of our sessions */
void *pUsr; /**< a user-settable pointer (provides extensibility for "derived classes")*/
/* callbacks */
int (*pIsPermittedHost)(struct sockaddr *addr, char *fromHostFQDN, void*pUsrSrv, void*pUsrSess);
rsRetVal (*pRcvData)(tcps_sess_t*, char*, size_t, ssize_t *);
rsRetVal (*OpenLstnSocks)(struct tcpsrv_s*);
rsRetVal (*pOnListenDeinit)(void*);
rsRetVal (*OnDestruct)(void*);
rsRetVal (*pOnRegularClose)(tcps_sess_t *pSess);
rsRetVal (*pOnErrClose)(tcps_sess_t *pSess);
/* session specific callbacks */
rsRetVal (*pOnSessAccept)(tcpsrv_t *, tcps_sess_t*);
rsRetVal (*OnSessConstructFinalize)(void*);
rsRetVal (*pOnSessDestruct)(void*);
rsRetVal (*OnMsgReceive)(tcps_sess_t *, uchar *pszMsg, int iLenMsg); /* submit message callback */
};
/**
* The following structure is a set of descriptors that need to be processed.
* This set will be the result of the epoll or select call and be used
* in the actual request processing stage. It serves as a basis
* to run multiple request by concurrent threads. -- rgerhards, 2011-01-24
*/
struct tcpsrv_workset_s {
int idx; /**< index into session table (or -1 if listener) */
void *pUsr;
};
/* interfaces */
BEGINinterface(tcpsrv) /* name must also be changed in ENDinterface macro! */
INTERFACEObjDebugPrint(tcpsrv);
rsRetVal (*Construct)(tcpsrv_t **ppThis);
rsRetVal (*ConstructFinalize)(tcpsrv_t __attribute__((unused)) *pThis);
rsRetVal (*Destruct)(tcpsrv_t **ppThis);
rsRetVal (*configureTCPListen)(tcpsrv_t*, uchar *pszPort);
//rsRetVal (*SessAccept)(tcpsrv_t *pThis, tcpLstnPortList_t*, tcps_sess_t **ppSess, netstrm_t *pStrm);
rsRetVal (*create_tcp_socket)(tcpsrv_t *pThis);
rsRetVal (*Run)(tcpsrv_t *pThis);
/* set methods */
rsRetVal (*SetAddtlFrameDelim)(tcpsrv_t*, int);
rsRetVal (*SetInputName)(tcpsrv_t*, uchar*);
rsRetVal (*SetUsrP)(tcpsrv_t*, void*);
rsRetVal (*SetCBIsPermittedHost)(tcpsrv_t*, int (*) (struct sockaddr *addr, char*, void*, void*));
rsRetVal (*SetCBOpenLstnSocks)(tcpsrv_t *, rsRetVal (*)(tcpsrv_t*));
rsRetVal (*SetCBRcvData)(tcpsrv_t *pThis, rsRetVal (*pRcvData)(tcps_sess_t*, char*, size_t, ssize_t*));
rsRetVal (*SetCBOnListenDeinit)(tcpsrv_t*, rsRetVal (*)(void*));
rsRetVal (*SetCBOnDestruct)(tcpsrv_t*, rsRetVal (*) (void*));
rsRetVal (*SetCBOnRegularClose)(tcpsrv_t*, rsRetVal (*) (tcps_sess_t*));
rsRetVal (*SetCBOnErrClose)(tcpsrv_t*, rsRetVal (*) (tcps_sess_t*));
rsRetVal (*SetDrvrMode)(tcpsrv_t *pThis, int iMode);
rsRetVal (*SetDrvrAuthMode)(tcpsrv_t *pThis, uchar *pszMode);
rsRetVal (*SetDrvrPermPeers)(tcpsrv_t *pThis, permittedPeers_t*);
/* session specifics */
rsRetVal (*SetCBOnSessAccept)(tcpsrv_t*, rsRetVal (*) (tcpsrv_t*, tcps_sess_t*));
rsRetVal (*SetCBOnSessDestruct)(tcpsrv_t*, rsRetVal (*) (void*));
rsRetVal (*SetCBOnSessConstructFinalize)(tcpsrv_t*, rsRetVal (*) (void*));
/* added v5 */
rsRetVal (*SetSessMax)(tcpsrv_t *pThis, int iMaxSess); /* 2009-04-09 */
/* added v6 */
rsRetVal (*SetOnMsgReceive)(tcpsrv_t *pThis, rsRetVal (*OnMsgReceive)(tcps_sess_t*, uchar*, int)); /* 2009-05-24 */
rsRetVal (*SetRuleset)(tcpsrv_t *pThis, ruleset_t*); /* 2009-06-12 */
/* added v7 (accidently named v8!) */
rsRetVal (*SetLstnMax)(tcpsrv_t *pThis, int iMaxLstn); /* 2009-08-17 */
rsRetVal (*SetNotificationOnRemoteClose)(tcpsrv_t *pThis, int bNewVal); /* 2009-10-01 */
/* added v9 -- rgerhards, 2010-03-01 */
rsRetVal (*SetbDisableLFDelim)(tcpsrv_t*, int);
/* added v10 -- rgerhards, 2011-04-01 */
rsRetVal (*SetUseFlowControl)(tcpsrv_t*, int);
/* added v11 -- rgerhards, 2011-05-09 */
rsRetVal (*SetKeepAlive)(tcpsrv_t*, int);
ENDinterface(tcpsrv)
#define tcpsrvCURR_IF_VERSION 11 /* increment whenever you change the interface structure! */
/* change for v4:
* - SetAddtlFrameDelim() added -- rgerhards, 2008-12-10
* - SetInputName() added -- rgerhards, 2008-12-10
* change for v5 and up: see above
*/
/* prototypes */
PROTOTYPEObj(tcpsrv);
/* the name of our library binary */
#define LM_TCPSRV_FILENAME "lmtcpsrv"
#endif /* #ifndef INCLUDED_TCPSRV_H */
|
