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| -rw-r--r-- | runtime/net.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/runtime/net.h b/runtime/net.h new file mode 100644 index 0000000..88d2df5 --- /dev/null +++ b/runtime/net.h @@ -0,0 +1,180 @@ +/* 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 */ |