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Fragmented IP packet's inner_pdu PDUs are not decoded now.

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This commit is contained in:
Matias Fontanini
2013-11-16 19:40:08 -03:00
parent dc6c37777b
commit a6655191d4
2 changed files with 34 additions and 15 deletions
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35
src/ip.cpp
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@@ -117,24 +117,31 @@ IP::IP(const uint8_t *buffer, uint32_t total_sz)
throw malformed_packet();
total_sz -= head_len() * sizeof(uint32_t);
if (total_sz) {
inner_pdu(
Internals::pdu_from_flag(
static_cast<Constants::IP::e>(_ip.protocol),
buffer,
total_sz,
false
)
);
if(!inner_pdu()) {
// Don't try to decode it if it's fragmented
if(frag_off() == 0 || frag_off() == 0x4000) {
inner_pdu(
Internals::allocate<IP>(
_ip.protocol,
Internals::pdu_from_flag(
static_cast<Constants::IP::e>(_ip.protocol),
buffer,
total_sz
total_sz,
false
)
);
if(!inner_pdu())
inner_pdu(new RawPDU(buffer, total_sz));
if(!inner_pdu()) {
inner_pdu(
Internals::allocate<IP>(
_ip.protocol,
buffer,
total_sz
)
);
if(!inner_pdu())
inner_pdu(new RawPDU(buffer, total_sz));
}
}
else {
// It's fragmented, just use RawPDU
inner_pdu(new RawPDU(buffer, total_sz));
}
}
}