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/* Definitions for network-related stuff.
*
* Copyright 2007-2016 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* The rsyslog runtime 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 3 of the License, or
* (at your option) any later version.
*
* The rsyslog runtime 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 the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
*/
#ifndef INCLUDED_NET_H
#define INCLUDED_NET_H
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h> /* this is needed on HP UX -- rgerhards, 2008-03-04 */
typedef enum _TCPFRAMINGMODE {
TCP_FRAMING_OCTET_STUFFING = 0, /* traditional LF-delimited */
TCP_FRAMING_OCTET_COUNTING = 1 /* -transport-tls like octet count */
} TCPFRAMINGMODE;
#define F_SET(where, flag) ((where)|=(flag))
#define F_ISSET(where, flag) (((where)&(flag))==(flag))
#define F_UNSET(where, flag) ((where)&=~(flag))
#define ADDR_NAME 0x01 /* address is hostname wildcard) */
#define ADDR_PRI6 0x02 /* use IPv6 address prior to IPv4 when resolving */
/* portability: incase IP_FREEBIND is not defined */
#ifndef IP_FREEBIND
#define IP_FREEBIND 0
#endif
/* defines for IP_FREEBIND, currently being used in imudp */
#define IPFREEBIND_DISABLED 0x00 /* don't enable IP_FREEBIND in sock option */
#define IPFREEBIND_ENABLED_NO_LOG 0x01 /* enable IP_FREEBIND but no warn on success */
#define IPFREEBIND_ENABLED_WITH_LOG 0x02 /* enable IP_FREEBIND and warn on success */
#ifdef OS_BSD
# ifndef _KERNEL
# define s6_addr32 __u6_addr.__u6_addr32
# endif
#endif
struct NetAddr {
uint8_t flags;
union {
struct sockaddr *NetAddr;
char *HostWildcard;
} addr;
};
#ifndef SO_BSDCOMPAT
/* this shall prevent compiler errors due to undefined name */
# define SO_BSDCOMPAT 0
#endif
/* IPv6 compatibility layer for older platforms
* We need to handle a few things different if we are running
* on an older platform which does not support all the glory
* of IPv6. We try to limit toll on features and reliability,
* but obviously it is better to run rsyslog on a platform that
* supports everything...
* rgerhards, 2007-06-22
*/
#ifndef AI_NUMERICSERV
# define AI_NUMERICSERV 0
#endif
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
#define SALEN(sa) ((sa)->sa_len)
#else
static inline size_t __attribute__((unused))
SALEN(struct sockaddr *sa) {
switch (sa->sa_family) {
case AF_INET: return (sizeof (struct sockaddr_in));
case AF_INET6: return (sizeof (struct sockaddr_in6));
default: return 0;
}
}
#endif
struct AllowedSenders {
struct NetAddr allowedSender; /* ip address allowed */
uint8_t SignificantBits; /* defines how many bits should be discarded (eqiv to mask) */
struct AllowedSenders *pNext;
};
/* this structure is a helper to implement wildcards in permittedPeers_t. It specifies
* the domain component and the matching mode.
* rgerhards, 2008-05-27
*/
struct permittedPeerWildcard_s {
uchar *pszDomainPart;
size_t lenDomainPart;
enum {
PEER_WILDCARD_NONE = 0, /**< no wildcard in this entry */
PEER_WILDCARD_AT_START = 1, /**< wildcard at start of entry (*name) */
PEER_WILDCARD_AT_END = 2, /**< wildcard at end of entry (name*) */
PEER_WILDCARD_MATCH_ALL = 3, /**< only * wildcard, matches all values */
PEER_WILDCARD_EMPTY_COMPONENT = 4/**< special case: domain component empty (e.g. "..") */
} wildcardType;
permittedPeerWildcard_t *pNext;
};
/* for fingerprints and hostnames, we need to have a temporary linked list of
* permitted values. Unforutnately, we must also duplicate this in the netstream
* drivers. However, this is the best interim solution (with the least effort).
* A clean implementation requires that we have more capable variables and the
* full-fledged scripting engine available. So we have opted to do the interim
* solution so that our users can begin to enjoy authenticated TLS. The next step
* (hopefully) is to enhance RainerScript. -- rgerhards, 2008-05-19
*/
struct permittedPeers_s {
uchar *pszID;
enum {
PERM_PEER_TYPE_UNDECIDED = 0, /**< we have not yet decided the type (fine in some auth modes) */
PERM_PEER_TYPE_PLAIN = 1, /**< just plain text contained */
PERM_PEER_TYPE_WILDCARD = 2, /**< wildcards are contained, wildcard struture is filled */
} etryType;
permittedPeers_t *pNext;
permittedPeerWildcard_t *pWildcardRoot; /**< root of the wildcard, NULL if not initialized */
permittedPeerWildcard_t *pWildcardLast; /**< end of the wildcard list, NULL if not initialized */
};
/* interfaces */
BEGINinterface(net) /* name must also be changed in ENDinterface macro! */
rsRetVal (*cvthname)(struct sockaddr_storage *f, prop_t **localName, prop_t **fqdn, prop_t **ip);
/* things to go away after proper modularization */
rsRetVal (*addAllowedSenderLine)(char* pName, uchar** ppRestOfConfLine);
void (*PrintAllowedSenders)(int iListToPrint);
void (*clearAllowedSenders)(uchar*);
void (*debugListenInfo)(int fd, char *type);
int *(*create_udp_socket)(uchar *hostname, uchar *LogPort, int bIsServer, int rcvbuf, int sndbuf,
int ipfreebind, char *device);
void (*closeUDPListenSockets)(int *finet);
int (*isAllowedSender)(uchar *pszType, struct sockaddr *pFrom, const char *pszFromHost); /* deprecated! */
rsRetVal (*getLocalHostname)(rsconf_t *const, uchar**);
int (*should_use_so_bsdcompat)(void);
/* permitted peer handling should be replaced by something better (see comments above) */
rsRetVal (*AddPermittedPeer)(permittedPeers_t **ppRootPeer, uchar *pszID);
rsRetVal (*DestructPermittedPeers)(permittedPeers_t **ppRootPeer);
rsRetVal (*PermittedPeerWildcardMatch)(permittedPeers_t *pPeer, const uchar *pszNameToMatch, int *pbIsMatching);
/* v5 interface additions */
int (*CmpHost)(struct sockaddr_storage *, struct sockaddr_storage*, size_t);
/* v6 interface additions - 2009-11-16 */
rsRetVal (*HasRestrictions)(uchar *, int *bHasRestrictions);
int (*isAllowedSender2)(uchar *pszType, struct sockaddr *pFrom, const char *pszFromHost, int bChkDNS);
/* v7 interface additions - 2012-03-06 */
rsRetVal (*GetIFIPAddr)(uchar *szif, int family, uchar *pszbuf, int lenBuf);
/* v8 cvthname() signature change -- rgerhards, 2013-01-18 */
/* v9 create_udp_socket() signature change -- dsahern, 2016-11-11 */
/* v10 moved data members to rsconf_t -- alakatos, 2021-12-29 */
ENDinterface(net)
#define netCURR_IF_VERSION 10 /* increment whenever you change the interface structure! */
/* prototypes */
PROTOTYPEObj(net);
/* the name of our library binary */
#define LM_NET_FILENAME "lmnet"
#endif /* #ifndef INCLUDED_NET_H */
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