Wiesner András
8676a392e5
- TCPWindow added - Checksum bug fixed (again) - CBD introduced - ConnBlock modified - PackSieve report funtionality modified to decrease memory consumption
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
//
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// Created by epagris on 2022.11.07..
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//
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#include "ipv4_connblock.h"
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#include "../packet_parsers/packet_parsers.h"
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#include "../../utils.h"
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static bool filtIPv4(const PcktSieveFilterCondition *filtCond, const PcktProps *contProps, const PcktProps *ownProps, EthInterface * intf) {
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EthernetProps *etherProps = (EthernetProps *) contProps;
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IPv4Props *ipProps = (IPv4Props *) ownProps;
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return etherProps->length_type == ETH_IPv4_PACKET_CLASS && ((IP_ADDR_FROM_FILTCOND(filtCond) == ipProps->DestIPAddr) ||
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((IP_ADDR_FROM_FILTCOND(filtCond) == IPv4_IF_ADDR) && (ipProps->DestIPAddr == intf->ip) && (intf->ip != 0)));
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}
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ConnBlock ipv4_new_connblock(EthInterface *intf, ip4_addr ipAddr, SieveCallBackFn cbFn) {
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ConnBlock connb;
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PcktSieveFilterCondition filtCond;
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packfiltcond_zero(&filtCond);
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IP_ADDR_TO_FILTCOND(&filtCond, ipAddr);
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PcktSieveLayerTag tag;
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tag.u = 0;
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bool matchAny = ipAddr == IPv4_ANY_ADDR;
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connb.sieveLayer = packsieve_new_layer(&intf->sieve.layer0, &filtCond, matchAny, filtIPv4, cbFn, tag, ETH_IPv4_PACKET_CLASS);
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ASSERT_NULL(connb.sieveLayer);
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connb.sieve = &intf->sieve;
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connb.sieveLayer->connBReportFn = ipv4_print_report;
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return connb;
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}
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void ipv4_print_report(const ConnBlock* connBlock) {
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const PcktSieveLayer * sl = connBlock->sieveLayer;
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ip4_addr ipAddr = IP_ADDR_FROM_FILTCOND(&sl->filtCond);
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if (!sl->matchAny) {
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if (ipAddr == IPv4_IF_ADDR) {
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ipAddr = connBlock->sieve->intf->ip;
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}
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INFO("IP: %u.%u.%u.%u", (ipAddr & 0xFF), ((ipAddr >> 8) & 0xFF),
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((ipAddr >> 16) & 0xFF), ((ipAddr >> 24) & 0xFF));
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} else {
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INFO("IP: ANY");
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}
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} |