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git.ipfire.org Git - thirdparty/squid.git/blob - src/comm/Connection.h
2 * Copyright (C) 1996-2022 The Squid Software Foundation and contributors
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
9 /* DEBUG: section 05 Socket Functions */
11 #ifndef _SQUIDCONNECTIONDETAIL_H_
12 #define _SQUIDCONNECTIONDETAIL_H_
14 #include "base/CodeContext.h"
15 #include "base/InstanceId.h"
16 #include "comm/forward.h"
19 #include "eui/Eui48.h"
20 #include "eui/Eui64.h"
22 #include "hier_code.h"
23 #include "ip/Address.h"
24 #include "ip/forward.h"
25 #include "mem/forward.h"
26 #include "time/gadgets.h"
35 class NegotiationHistory
;
41 /* TODO: make these a struct of boolean flags members in the connection instead of a bitmap.
42 * we can't do that until all non-comm code uses Commm::Connection objects to create FD
43 * currently there is code still using comm_open() and comm_openex() synchronously!!
45 #define COMM_UNSET 0x00
46 #define COMM_NONBLOCKING 0x01 // default flag.
47 #define COMM_NOCLOEXEC 0x02
48 #define COMM_REUSEADDR 0x04 // shared FD may be both accept()ing and read()ing
49 #define COMM_DOBIND 0x08 // requires a bind()
50 #define COMM_TRANSPARENT 0x10 // arrived via TPROXY
51 #define COMM_INTERCEPTION 0x20 // arrived via NAT
52 #define COMM_REUSEPORT 0x40 //< needs SO_REUSEPORT
53 /// not registered with Comm and not owned by any connection-closing code
54 #define COMM_ORPHANED 0x40
57 * Store data about the physical and logical attributes of a connection.
59 * Some link state can be inferred from the data, however this is not an
60 * object for state data. But a semantic equivalent for FD with easily
61 * accessible cached properties not requiring repeated complex lookups.
63 * Connection properties may be changed until the connection is opened.
64 * Properties should be considered read-only outside of the Comm layer
65 * code once the connection is open.
67 * These objects should not be passed around directly,
68 * but a Comm::ConnectionPointer should be passed instead.
70 class Connection
: public CodeContext
72 MEMPROXY_CLASS(Comm::Connection
);
77 /** Clear the connection properties and close any open socket. */
78 virtual ~Connection();
80 /// To prevent accidental copying of Connection objects that we started to
81 /// open or that are open, use cloneProfile() instead.
82 Connection(const Connection
&&) = delete;
84 /// Create a new closed Connection with the same configuration as this one.
85 ConnectionPointer
cloneProfile() const;
87 /// close the still-open connection when its last reference is gone
88 void enterOrphanage() { flags
|= COMM_ORPHANED
; }
89 /// resume relying on owner(s) to initiate an explicit connection closure
90 void leaveOrphanage() { flags
&= ~COMM_ORPHANED
; }
92 /** Close any open socket. */
95 /** Synchronize with Comm: Somebody closed our connection. */
98 /** determine whether this object describes an active connection or not. */
99 bool isOpen() const { return (fd
>= 0); }
101 /** Alter the stored IP address pair.
102 * WARNING: Does not ensure matching IPv4/IPv6 are supplied.
104 void setAddrs(const Ip::Address
&aLocal
, const Ip::Address
&aRemote
) {local
= aLocal
; remote
= aRemote
;}
106 /** retrieve the CachePeer pointer for use.
107 * The caller is responsible for all CBDATA operations regarding the
108 * used of the pointer returned.
110 CachePeer
* getPeer() const;
112 /** alter the stored CachePeer pointer.
113 * Perform appropriate CBDATA operations for locking the CachePeer pointer
115 void setPeer(CachePeer
* p
);
117 /** The time the connection started */
118 time_t startTime() const {return startTime_
;}
120 /** The connection lifetime */
121 time_t lifeTime() const {return squid_curtime
- startTime_
;}
123 /** The time left for this connection*/
124 time_t timeLeft(const time_t idleTimeout
) const;
126 /// Connection establishment timeout for callers that have already decided
127 /// to connect(2), either for the first time or after checking
128 /// EnoughTimeToReForward() during any re-forwarding attempts.
129 /// \returns the time left for this connection to become connected
130 /// \param fwdStart The start time of the peer selection/connection process.
131 time_t connectTimeout(const time_t fwdStart
) const;
133 void noteStart() {startTime_
= squid_curtime
;}
135 Security::NegotiationHistory
*tlsNegotiations();
136 const Security::NegotiationHistory
*hasTlsNegotiations() const {return tlsHistory
;}
138 /* CodeContext API */
139 virtual ScopedId
codeContextGist() const override
;
140 virtual std::ostream
&detailCodeContext(std::ostream
&os
) const override
;
143 /** Address/Port for the Squid end of a TCP link. */
146 /** Address for the Remote end of a TCP link. */
149 /** Hierarchy code for this connection link */
152 /** Socket used by this connection. Negative if not open. */
155 /** Quality of Service TOS values currently sent on this connection */
158 /** Netfilter MARK values currently sent on this connection
159 * In case of FTP, the MARK will be sent on data connections as well.
163 /** Netfilter CONNMARK value previously retrieved from this connection
164 * In case of FTP, the CONNMARK will NOT be applied to data connections, for one main reason:
165 * the CONNMARK could be set by a third party like iptables and overwriting it in squid may
166 * cause side effects and break CONNMARK-based policy. In other words, data connection is
167 * related to control connection, but it's not the same.
169 nfmark_t nfConnmark
= 0;
171 /** COMM flags set on this connection */
174 char rfc931
[USER_IDENT_SZ
];
177 Eui::Eui48 remoteEui48
;
178 Eui::Eui64 remoteEui64
;
181 InstanceId
<Connection
, uint64_t> id
;
184 /** cache_peer data object (if any) */
187 /** The time the connection object was created */
190 /** TLS connection details*/
191 Security::NegotiationHistory
*tlsHistory
;
196 std::ostream
&operator << (std::ostream
&os
, const Comm::Connection
&conn
);
198 inline std::ostream
&
199 operator << (std::ostream
&os
, const Comm::ConnectionPointer
&conn
)