1 /* 2 Copyright (c) 2013-2019, The Linux Foundation. All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions are 6 met: 7 * Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 * Redistributions in binary form must reproduce the above 10 copyright notice, this list of conditions and the following 11 disclaimer in the documentation and/or other materials provided 12 with the distribution. 13 * Neither the name of The Linux Foundation nor the names of its 14 contributors may be used to endorse or promote products derived 15 from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef IPACM_CONNTRACK_NATAPP_H 30 #define IPACM_CONNTRACK_NATAPP_H 31 32 #include <string.h> /* for stderror */ 33 #include <stdlib.h> 34 #include <cstdio> /* for perror */ 35 36 #include "IPACM_Config.h" 37 #include "IPACM_Xml.h" 38 39 extern "C" 40 { 41 #include <libnetfilter_conntrack/libnetfilter_conntrack.h> 42 #include <ipa_nat_drv.h> 43 } 44 45 #define MAX_TEMP_ENTRIES 25 46 47 #define IPACM_TCP_FULL_FILE_NAME "/proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established" 48 #define IPACM_UDP_FULL_FILE_NAME "/proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout_stream" 49 50 typedef struct _nat_table_entry 51 { 52 uint32_t private_ip; 53 uint16_t private_port; 54 55 uint32_t target_ip; 56 uint16_t target_port; 57 58 uint32_t public_ip; 59 uint16_t public_port; 60 61 u_int8_t protocol; 62 uint32_t timestamp; 63 64 bool dst_nat; 65 bool enabled; 66 uint32_t rule_hdl; 67 68 /* used for pcie-modem */ 69 uint32_t rule_id; 70 }nat_table_entry; 71 72 #define CHK_TBL_HDL() if(nat_table_hdl == 0){ return -1; } 73 74 class NatApp 75 { 76 private: 77 78 static NatApp *pInstance; 79 80 nat_table_entry *cache; 81 nat_table_entry temp[MAX_TEMP_ENTRIES]; 82 uint32_t pub_ip_addr; 83 uint32_t pub_ip_addr_pre; 84 uint32_t nat_table_hdl; 85 /* used for pcie-modem */ 86 uint8_t pub_mux_id; 87 88 int curCnt, max_entries; 89 90 ipacm_alg *pALGPorts; 91 uint16_t nALGPort; 92 93 uint32_t tcp_timeout; 94 uint32_t udp_timeout; 95 96 uint32_t PwrSaveIfs[IPA_MAX_NUM_WIFI_CLIENTS]; 97 98 struct nf_conntrack *ct; 99 struct nfct_handle *ct_hdl; 100 101 int m_fd_ipa; 102 103 NatApp(); 104 ~NatApp(); 105 int Init(); 106 107 void UpdateCTUdpTs(nat_table_entry *, uint32_t); 108 bool ChkForDup(const nat_table_entry *); 109 bool isAlgPort(uint8_t, uint16_t); 110 void Reset(); 111 bool isPwrSaveIf(uint32_t); 112 uint32_t GenerateMetdata(uint8_t mux_id); 113 114 public: 115 static NatApp* GetInstance(); 116 117 int AddTable(uint32_t, uint8_t mux_id); 118 uint32_t GetTableHdl(uint32_t); 119 int DeleteTable(uint32_t); 120 121 int AddEntry(const nat_table_entry *); 122 int DeleteEntry(const nat_table_entry *); 123 124 int AddConnection(const nat_table_entry *); 125 int DelConnection(const uint32_t); 126 127 void UpdateUDPTimeStamp(); 128 129 int UpdatePwrSaveIf(uint32_t); 130 int ResetPwrSaveIf(uint32_t); 131 int DelEntriesOnClntDiscon(uint32_t); 132 int DelEntriesOnSTAClntDiscon(uint32_t); 133 134 void Read_TcpUdp_Timeout(void); 135 136 void AddTempEntry(const nat_table_entry *); 137 void CacheEntry(const nat_table_entry *); 138 void DeleteTempEntry(const nat_table_entry *); 139 void FlushTempEntries(uint32_t, bool, bool isDummy = false); 140 }; 141 142 143 144 #endif /* IPACM_CONNTRACK_NATAPP_H */ 145