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Implemented matches_response on several PDUs. Added some test cases.

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This commit is contained in:
Matias Fontanini
2013-04-02 21:05:53 -03:00
parent 97049140af
commit f2a5f73337
16 changed files with 352 additions and 12 deletions
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29
src/ipv6.cpp
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@@ -35,7 +35,7 @@
#else
#include <ws2tcpip.h>
#endif
#include <iostream> //borrame
#include <algorithm>
#include "ipv6.h"
#include "constants.h"
#include "packet_sender.h"
@@ -161,6 +161,33 @@ uint32_t IPv6::header_size() const {
return sizeof(_header) + headers_size;
}
bool IPv6::matches_response(uint8_t *ptr, uint32_t total_sz) {
if(total_sz < sizeof(ipv6_header))
return false;
const ipv6_header *hdr_ptr = (const ipv6_header*)ptr;
// checks for ff02 multicast
if(src_addr() == hdr_ptr->dst_addr &&
(dst_addr() == hdr_ptr->src_addr || (_header.dst_addr[0] == 0xff && _header.dst_addr[1] == 0x02))) {
// is this OK? there's no inner pdu, simple dst/src addr match should suffice
if(!inner_pdu())
return true;
ptr += sizeof(ipv6_header);
total_sz -= sizeof(ipv6_header);
uint8_t current = hdr_ptr->next_header;
// 8 == minimum header size
while(total_sz > 8 && is_extension_header(current)) {
if(static_cast<uint32_t>(ptr[1] + 1) * 8 > total_sz)
return false;
current = ptr[0];
total_sz -= (ptr[1] + 1) * 8;
ptr += (ptr[1] + 1) * 8;
}
if(!is_extension_header(current))
return inner_pdu()->matches_response(ptr, total_sz);
}
return false;
}
void IPv6::write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *parent) {
#ifdef DEBUG
assert(total_sz >= header_size());