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Docs and a small build fix in debug mode.

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This commit is contained in:
Adam Ierymenko 2017-02-06 07:17:45 -08:00
parent 43182f8f57
commit f85a630a64
2 changed files with 44 additions and 45 deletions
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35
node/IncomingPacket.cpp
View File

@ -212,15 +212,13 @@ bool IncomingPacket::_doHELLO(const RuntimeEnvironment *RR,const bool alreadyAut
const unsigned int vMinor = (*this)[ZT_PROTO_VERB_HELLO_IDX_MINOR_VERSION];
const unsigned int vRevision = at<uint16_t>(ZT_PROTO_VERB_HELLO_IDX_REVISION);
const uint64_t timestamp = at<uint64_t>(ZT_PROTO_VERB_HELLO_IDX_TIMESTAMP);
Identity id;
unsigned int ptr = ZT_PROTO_VERB_HELLO_IDX_IDENTITY + id.deserialize(*this,ZT_PROTO_VERB_HELLO_IDX_IDENTITY);
if (protoVersion < ZT_PROTO_VERSION_MIN) {
TRACE("dropped HELLO from %s(%s): protocol version too old",id.address().toString().c_str(),_path->address().toString().c_str());
return true;
}
Identity id;
unsigned int ptr = ZT_PROTO_VERB_HELLO_IDX_IDENTITY + id.deserialize(*this,ZT_PROTO_VERB_HELLO_IDX_IDENTITY);
if (fromAddress != id.address()) {
TRACE("dropped HELLO from %s(%s): identity does not match packet source address",fromAddress.toString().c_str(),_path->address().toString().c_str());
return true;
@ -301,8 +299,11 @@ bool IncomingPacket::_doHELLO(const RuntimeEnvironment *RR,const bool alreadyAut
// Get external surface address if present (was not in old versions)
InetAddress externalSurfaceAddress;
if (ptr < size())
if (ptr < size()) {
ptr += externalSurfaceAddress.deserialize(*this,ptr);
if ((externalSurfaceAddress)&&(hops() == 0))
RR->sa->iam(id.address(),_path->localAddress(),_path->address(),externalSurfaceAddress,RR->topology->isUpstream(id),now);
}
// Get primary planet world ID and world timestamp if present
uint64_t planetWorldId = 0;
@ -329,17 +330,16 @@ bool IncomingPacket::_doHELLO(const RuntimeEnvironment *RR,const bool alreadyAut
// Handle COR if present (older versions don't send this)
if ((ptr + 2) <= size()) {
//const unsigned int corSize = at<uint16_t>(ptr); ptr += 2;
ptr += 2;
CertificateOfRepresentation cor;
ptr += cor.deserialize(*this,ptr);
if (at<uint16_t>(ptr) > 0) {
CertificateOfRepresentation cor;
ptr += 2;
ptr += cor.deserialize(*this,ptr);
} else ptr += 2;
}
}
// Learn our external surface address from other peers to help us negotiate symmetric NATs
// and detect changes to our global IP that can trigger path renegotiation.
if ((externalSurfaceAddress)&&(hops() == 0))
RR->sa->iam(id.address(),_path->localAddress(),_path->address(),externalSurfaceAddress,RR->topology->isUpstream(id),now);
// Send OK(HELLO) with an echo of the packet's timestamp and some of the same
// information about us: version, sent-to address, etc.
Packet outp(id.address(),RR->identity.address(),Packet::VERB_OK);
outp.append((unsigned char)Packet::VERB_HELLO);
@ -466,10 +466,11 @@ bool IncomingPacket::_doOK(const RuntimeEnvironment *RR,const SharedPtr<Peer> &p
// Handle COR if present (older versions don't send this)
if ((ptr + 2) <= size()) {
//const unsigned int corSize = at<uint16_t>(ptr); ptr += 2;
ptr += 2;
CertificateOfRepresentation cor;
ptr += cor.deserialize(*this,ptr);
if (at<uint16_t>(ptr) > 0) {
CertificateOfRepresentation cor;
ptr += 2;
ptr += cor.deserialize(*this,ptr);
} else ptr += 2;
}
TRACE("%s(%s): OK(HELLO), version %u.%u.%u, latency %u, reported external address %s",source().toString().c_str(),_path->address().toString().c_str(),vMajor,vMinor,vRevision,latency,((externalSurfaceAddress) ? externalSurfaceAddress.toString().c_str() : "(none)"));

54
node/Packet.hpp
View File

@ -538,8 +538,7 @@ public:
* <[2] software revision>
* <[8] timestamp for determining latency>
* <[...] binary serialized identity (see Identity)>
* <[1] destination address type>
* [<[...] destination address to which packet was sent>]
* <[...] physical destination address of packet>
* <[8] 64-bit world ID of current planet>
* <[8] 64-bit timestamp of current planet>
* [... remainder if packet is encrypted using cryptField() ...]
@ -547,40 +546,39 @@ public:
* [<[1] 8-bit type ID of moon>]
* [<[8] 64-bit world ID of moon>]
* [<[8] 64-bit timestamp of moon>]
* [... additional moons ...]
* [... additional moon type/ID/timestamp tuples ...]
* <[2] 16-bit length of certificate of representation>
* [... certificate of representation ...]
*
* The initial fields of HELLO are sent in the clear. Fields after the
* planet definition (which are common knowledge) are however encrypted
* using the cryptField() function. The packet is MAC'd as usual using
* the same MAC construct as other packets.
* HELLO is sent in the clear as it is how peers share their identity
* public keys. A few additional fields are sent in the clear too, but
* these are things that are public info or are easy to determine. As
* of 1.2.0 we have added a few more fields, but since these could have
* the potential to be sensitive we introduced the encryption of the
* remainder of the packet. See cryptField(). Packet MAC is still
* performed of course, so authentication occurs as normal.
*
* The destination address is the wire address to which this packet is
* being sent, and in OK is *also* the destination address of the OK
* packet. This can be used by the receiver to detect NAT, learn its real
* external address if behind NAT, and detect changes to its external
* address that require re-establishing connectivity.
* Destination address is the actual wire address to which the packet
* was sent. See InetAddress::serialize() for format.
*
* Destination address types and formats (not all of these are used now):
* 0x00 - None -- no destination address data present
* 0x01 - Ethernet address -- format: <[6] Ethernet MAC>
* 0x04 - 6-byte IPv4 UDP address/port -- format: <[4] IP>, <[2] port>
* 0x06 - 18-byte IPv6 UDP address/port -- format: <[16] IP>, <[2] port>
*
* OK payload (note that OK is encrypted):
* <[8] timestamp (echoed from original HELLO)>
* <[1] protocol version (of responder)>
* <[1] software major version (of responder)>
* <[1] software minor version (of responder)>
* <[2] software revision (of responder)>
* <[1] destination address type (for this OK, not copied from HELLO)>
* [<[...] destination address>]
* <[2] 16-bit length of world update or 0 if none>
* OK payload:
* <[8] HELLO timestamp field echo>
* <[1] protocol version>
* <[1] software major version>
* <[1] software minor version>
* <[2] software revision>
* <[...] physical destination address of packet>
* <[2] 16-bit length of world update(s) or 0 if none>
* [[...] updates to planets and/or moons]
* <[2] 16-bit length of certificate of representation (of responder)>
* <[2] 16-bit length of certificate of representation>
* [... certificate of representation ...]
*
* With the exception of the timestamp, the other fields pertain to the
* respondent who is sending OK and are not echoes.
*
* Note that OK is fully encrypted so no selective cryptField() of
* potentially sensitive fields is needed.
*
* ERROR has no payload.
*/
VERB_HELLO = 0x01,