| 1 | /// ----------------------------------------*- mode: C++; -*--
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| 2 | /// @file connectionmap.cpp
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| 3 | /// stores connection related data
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| 4 | /// ----------------------------------------------------------
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| 5 | /// $Id: connectionmap.cpp 2872 2008-02-18 10:58:03Z bless $
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| 6 | /// $HeadURL: https://svn.ipv6.tm.uka.de/nsis/protlib/trunk/src/connectionmap.cpp $
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| 7 | // ===========================================================
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| 8 | //
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| 9 | // Copyright (C) 2005-2007, all rights reserved by
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| 10 | // - Institute of Telematics, Universitaet Karlsruhe (TH)
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| 11 | //
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| 12 | // More information and contact:
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| 13 | // https://projekte.tm.uka.de/trac/NSIS
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| 14 | //
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| 15 | // This program is free software; you can redistribute it and/or modify
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| 16 | // it under the terms of the GNU General Public License as published by
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| 17 | // the Free Software Foundation; version 2 of the License
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| 18 | //
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| 19 | // This program is distributed in the hope that it will be useful,
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| 20 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 22 | // GNU General Public License for more details.
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| 23 | //
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| 24 | // You should have received a copy of the GNU General Public License along
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| 25 | // with this program; if not, write to the Free Software Foundation, Inc.,
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| 26 | // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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| 27 | //
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| 28 | // ===========================================================
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| 29 | #include "connectionmap.h"
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| 30 | #include "logfile.h"
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| 31 |
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| 32 | namespace protlib {
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| 33 | using namespace log;
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| 34 |
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| 35 | /** @ingroup tptcp
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| 36 | * @ingroup network
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| 37 | * @{
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| 38 | */
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| 39 |
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| 40 |
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| 41 | /***** class ConnectionMap *****/
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| 42 |
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| 43 | /** @class ConnectionMap connectionmap.h
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| 44 | The class ConnectionMap saves all required information about
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| 45 | currently existing connections. Its methods allow to check for
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| 46 | connections and return, if possible, the data associated
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| 47 | with the connection.
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| 48 | */
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| 49 |
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| 50 |
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| 51 | /** @returns true if data is not NULL, if there is not already
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| 52 | * an entry for data and if
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| 53 | * it is inserted into the internal hash maps.
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| 54 | *
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| 55 | */
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| 56 | bool ConnectionMap::insert(AssocData* assoc)
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| 57 | {
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| 58 | if (assoc)
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| 59 | {
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| 60 | if ( (assoc->socketfd && lookup(assoc->socketfd)) ||
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| 61 | (assoc->assoc && lookup(assoc->assoc)) ||
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| 62 | lookup(assoc->peer)) return false;
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| 63 | else
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| 64 | {
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| 65 | if (assoc->socketfd)
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| 66 | ass2data[assoc->socketfd] = assoc;
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| 67 | else
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| 68 | if (assoc->assoc)
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| 69 | ass2data[assoc->assoc] = assoc;
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| 70 | else
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| 71 | Log(ERROR_LOG,LOG_NORMAL,"ConnectionMap","insertion failed, both socketfd and associd are 0");
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| 72 |
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| 73 | addr2data[assoc->peer] = assoc;
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| 74 | return true;
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| 75 | } // end if already in map
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| 76 | } else return false;
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| 77 | } // end insert
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| 78 |
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| 79 | /** @returns a pointer to the AssocData object or NULL.
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| 80 | * @param socketfd socket file descriptor
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| 81 | */
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| 82 |
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| 83 | AssocData* ConnectionMap::lookup(socketfd_t socketfd) const
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| 84 | {
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| 85 | const_ass2data_it_t hit= ass2data.find(socketfd);
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| 86 | if (hit!=ass2data.end()) return hit->second;
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| 87 | else return NULL;
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| 88 | } // end lookup
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| 89 |
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| 90 | AssocData* ConnectionMap::lookup(associd_t associd) const
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| 91 | {
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| 92 | const_ass2data_it_t hit= ass2data.find(associd);
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| 93 | if (hit!=ass2data.end()) return hit->second;
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| 94 | else return NULL;
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| 95 | } // end lookup
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| 96 |
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| 97 | /** @returns a pointer to the AssocData object or NULL.
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| 98 | * @param addr IP-adress + port
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| 99 | *
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| 100 | */
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| 101 | AssocData* ConnectionMap::lookup(const appladdress& addr) const
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| 102 | {
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| 103 | const_addr2data_it_t hit= addr2data.find(addr);
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| 104 | if (hit!=addr2data.end()) return hit->second;
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| 105 | else return NULL;
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| 106 | } // end lookup
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| 107 |
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| 108 | /** @returns true if the AssocData-object with socketfd
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| 109 | * could be deleted
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| 110 | * @param socketfd socket file descriptor
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| 111 | */
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| 112 | bool ConnectionMap::erase(socketfd_t socketfd) {
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| 113 | bool res = true;
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| 114 | AssocData* d = lookup(socketfd);
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| 115 | if (d) {
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| 116 | if (!ass2data.erase(d->socketfd)) res = false;
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| 117 | if (!addr2data.erase(d->peer)) res = false;
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| 118 | delete d; // AssocData is deleted
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| 119 | return res;
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| 120 | } else return false;
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| 121 | } // end erase
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| 122 |
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| 123 | /**
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| 124 | * could be deleted
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| 125 | * @param associd association id
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| 126 | * @returns true if the AssocData-object with associd
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| 127 | */
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| 128 | bool ConnectionMap::erase(associd_t associd) {
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| 129 | bool res = true;
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| 130 | AssocData* d = lookup(associd);
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| 131 | if (d) {
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| 132 | if (!ass2data.erase(d->assoc)) res = false;
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| 133 | if (!addr2data.erase(d->peer)) res = false;
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| 134 | delete d; // AssocData is deleted
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| 135 | return res;
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| 136 | } else return false;
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| 137 | } // end erase
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| 138 |
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| 139 | /*
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| 140 | *
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| 141 | */
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| 142 | void ConnectionMap::clear() {
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| 143 | const_ass2data_it_t hit;
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| 144 | for (hit=ass2data.begin();hit!=ass2data.end();hit++) {
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| 145 | if (hit->second) delete hit->second;
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| 146 | } // end for hit
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| 147 | ass2data.clear();
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| 148 | addr2data.clear();
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| 149 | } // end clear
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| 150 |
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| 151 |
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| 152 | } // end namespace protlib
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| 153 | /// @}
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