39 lines
1.3 KiB
C
39 lines
1.3 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) {
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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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}
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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.intf = intf;
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if (!matchAny) {
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SNPRINTF(connb.sieveLayer->infoTag, PCKT_SIEVE_INFOTAG_LEN, "IP: %u.%u.%u.%u",
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(ipAddr & 0xFF), ((ipAddr >> 8) & 0xFF), ((ipAddr >> 16) & 0xFF), ((ipAddr >> 24) & 0xFF));
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} else {
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SNPRINTF(connb.sieveLayer->infoTag, PCKT_SIEVE_INFOTAG_LEN, "IP: ANY");
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}
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return connb;
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}
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