static Iface_DEFUN incomingMsg(struct Message* msg, struct Pathfinder_pvt* pf)
{
struct Address addr;
struct RouteHeader* hdr = (struct RouteHeader*) msg->bytes;
Message_shift(msg, -(RouteHeader_SIZE + DataHeader_SIZE), NULL);
Bits_memcpy(addr.ip6.bytes, hdr->ip6, 16);
Bits_memcpy(addr.key, hdr->publicKey, 32);
addr.protocolVersion = Endian_bigEndianToHost32(hdr->version_be);
addr.padding = 0;
addr.path = Endian_bigEndianToHost64(hdr->sh.label_be);
//Log_debug(pf->log, "Incoming DHT");
struct DHTMessage dht = {
.address = &addr,
.binMessage = msg,
.allocator = msg->alloc
};
DHTModuleRegistry_handleIncoming(&dht, pf->registry);
struct Message* nodeMsg = Message_new(0, 256, msg->alloc);
Iface_CALL(sendNode, nodeMsg, &addr, 0xfffffff0u, pf);
if (dht.pleaseRespond) {
// what a beautiful hack, see incomingFromDHT
return Iface_next(&pf->pub.eventIf, msg);
}
return NULL;
}
static Iface_DEFUN incomingFromEventIf(struct Message* msg, struct Iface* eventIf)
{
struct Pathfinder_pvt* pf = Identity_containerOf(eventIf, struct Pathfinder_pvt, pub.eventIf);
enum PFChan_Core ev = Message_pop32(msg, NULL);
if (Pathfinder_pvt_state_INITIALIZING == pf->state) {
Assert_true(ev == PFChan_Core_CONNECT);
return connected(pf, msg);
}
// Let the PF send another 128 path changes again because it's basically a new tick.
pf->bestPathChanges = 0;
switch (ev) {
case PFChan_Core_SWITCH_ERR: return switchErr(msg, pf);
case PFChan_Core_SEARCH_REQ: return searchReq(msg, pf);
case PFChan_Core_PEER: return peer(msg, pf);
case PFChan_Core_PEER_GONE: return peerGone(msg, pf);
case PFChan_Core_SESSION: return session(msg, pf);
case PFChan_Core_SESSION_ENDED: return sessionEnded(msg, pf);
case PFChan_Core_DISCOVERED_PATH: return discoveredPath(msg, pf);
case PFChan_Core_MSG: return incomingMsg(msg, pf);
case PFChan_Core_PING: return handlePing(msg, pf);
case PFChan_Core_PONG: return handlePong(msg, pf);
case PFChan_Core_UNSETUP_SESSION:
case PFChan_Core_LINK_STATE:
case PFChan_Core_CTRL_MSG: return NULL;
default:;
}
Assert_failure("unexpected event [%d]", ev);
}
static void sendEvent(struct Pathfinder_pvt* pf, enum PFChan_Pathfinder ev, void* data, int size)
{
struct Allocator* alloc = Allocator_child(pf->alloc);
struct Message* msg = Message_new(0, 512+size, alloc);
Message_push(msg, data, size, NULL);
Message_push32(msg, ev, NULL);
Iface_send(&pf->pub.eventIf, msg);
Allocator_free(alloc);
}
static void init(void* vpf)
{
struct Pathfinder_pvt* pf = Identity_check((struct Pathfinder_pvt*) vpf);
struct PFChan_Pathfinder_Connect conn = {
.superiority_be = Endian_hostToBigEndian32(1),
.version_be = Endian_hostToBigEndian32(Version_CURRENT_PROTOCOL)
};
CString_strncpy(conn.userAgent, "Cjdns internal pathfinder", 64);
sendEvent(pf, PFChan_Pathfinder_CONNECT, &conn, PFChan_Pathfinder_Connect_SIZE);
}
struct Pathfinder* Pathfinder_register(struct Allocator* allocator,
struct Log* log,
struct EventBase* base,
struct Random* rand,
struct Admin* admin)
{
struct Allocator* alloc = Allocator_child(allocator);
struct Pathfinder_pvt* pf = Allocator_calloc(alloc, sizeof(struct Pathfinder_pvt), 1);
Identity_set(pf);
pf->alloc = alloc;
pf->log = log;
pf->base = base;
pf->rand = rand;
pf->admin = admin;
pf->pub.eventIf.send = incomingFromEventIf;
pf->dhtModule.context = pf;
pf->dhtModule.handleOutgoing = incomingFromDHT;
// This needs to be done asynchronously so the pf can be plumbed to the core
Timeout_setTimeout(init, pf, 0, base, alloc);
return &pf->pub;
}
void notify_message(struct sockaddr *from, int proto, u_char *msg, int len)
{
u_short *p = (u_short *) msg ;
u_short msgid, flags ;
MSGPTR pMsg ;
#ifdef DEBUG
char logbuf[256] ;
#endif
msgid = ntohs(p[0]) ;
flags = ntohs(p[1]) ;
#ifdef DEBUG
if ((flags & 0x8000) == 0) {
sprintf(logbuf, "Request %04x (%04x) from %s, %d bytes",
msgid, flags, addrFmt(from, proto), len) ;
} else {
sprintf(logbuf, "Response %04x (%04x) from %s %d bytes",
msgid, flags, addrFmt(from, proto), len) ;
}
TRACE("%s\n", logbuf) ;
strcpy(logbuf, " ") ;
switch ((flags & 0x7800) >> 11) {
case 0 : strcat(logbuf, "QUERY ") ; break ;
case 1 : strcat(logbuf, "IQUERY ") ; break ;
case 2 : strcat(logbuf, "STATUS ") ; break ;
default : strcat(logbuf, "UNKNOWN") ; break ;
}
if ((flags & 0x0400) != 0) {
strcat(logbuf, ",AA") ;
}
if ((flags & 0x0200) != 0) {
strcat(logbuf, ",TC") ;
}
if ((flags & 0x0100) != 0) {
strcat(logbuf, ",RD") ;
}
if ((flags & 0x0080) != 0) {
strcat(logbuf, ",RA") ;
}
switch (flags & 0x00f) {
case 0 : strcat(logbuf, ",No Error ") ; break ;
case 1 : strcat(logbuf, ",Format Error ") ; break ;
case 2 : strcat(logbuf, ",Server Failure ") ; break ;
case 3 : strcat(logbuf, ",Name Error ") ; break ;
case 4 : strcat(logbuf, ",Not Implemented") ; break ;
case 5 : strcat(logbuf, ",Refused ") ; break ;
default : strcat(logbuf, ",Unknown Error ") ; break ;
}
TRACE("%s\n", logbuf) ;
#endif
if ((flags & 0x8000) == 0) { /* request from client */
if ((pMsg = searchReq(msgid, proto, from)) == NULL) {
pMsg = createReq(msgid, proto, from) ;
}
if (pMsg == NULL) {
WARN("notify_message - cannot create message record\n") ;
return ;
}
messageForward(pMsg, msg, len) ;
} else { /* response from server */
if ((pMsg = searchOrg(msgid, proto)) == NULL) {
WARN("notify_message - no corresponding request\n") ;
return ;
}
messageResponse(pMsg, msg, len) ;
disposeReq(pMsg);
}
}
