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psyced/world/net/psyc/library.i
2009-06-17 07:18:58 +02:00

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// vim:foldmethod=marker:syntax=lpc:noexpandtab
// $Id: library.i,v 1.172 2008/07/26 10:54:31 lynx Exp $
#include <psyc.h>
// #include "../base64.i"
#define QUIT destruct(ME); return 1;
#if SYSTEM_CHARSET != "UTF-8"
# echo "FIXME: PSYC will be not be rendered in UTF-8."
#endif
volatile mapping obj2unl = ([]);
volatile mapping unl2obj = ([]);
// global location to identification resolver
volatile mapping unl2uni = ([]);
varargs void register_location(mixed unl, vamixed uni, vaint unsafe) {
PROTECT("REGISTER_LOCATION")
if (uni) {
if (unsafe && unl2uni[unl]) {
P1(("register_location denied: %O says it is %O, but that is already registered for %O\n", uni, unl, unl2uni[unl]))
return;
}
unl2uni[unl] = uni;
}
else m_delete(unl2uni, unl);
}
#ifndef _flag_disable_module_authentication
/** finds the _identification for a network source. if it cannot find
** the information in the cache, and a second argument is given with
** the _identification claimed by the source, that _identification
** will be asked for confirmation via PSYC. the result will obviously
** be available only at a later time. there is no callback function
** to this purpose. this function will ONLY return an identification
** when it is effectively different from the provided source.
** when a source is its own identification, this returns to avoid
** any extra processing. maybe one day we will return 1 if that's
** useful in any way, but you can check source == givenUNI yourself.
** the reason why the variable is called givenUNI and not identification
** is because a client may very well claim to be someone and actually not
** be that person. we are not sure about identification before the
** _request_authentication has returned.
*/
// this code is used intensely in FORK mode, whereas in !FORK,
// since entity.c, the givenUNI is never passed, thus inactive.
// unl2uni is only being used for local users' clients, not remotes
//
varargs mixed lookup_identification(mixed source, vamixed givenUNI) {
PROTECT("LOOKUP_IDENTIFICATION")
P2(("lookup_identification %O (%O) in %O\n", source, givenUNI, unl2uni))
if (member(unl2uni, source)) return unl2uni[source];
// ask a remote uni, but don't wait to complete
if (givenUNI && source) {
unl2uni[source] = 0; // ensures that we don't get here twice
// now and in future always return 0 to avoid extra
// processing of
if (givenUNI == source) return 0;
P1(("%O sending _request_authentication to %O for %O\n",
ME, givenUNI, source))
# ifndef __PIKE__ // TPD
sendmsg(givenUNI, "_request_authentication", 0,
([ "_location" : source ]));
# endif
}
// we could look again ;)
//if (unl2uni[source]) return unl2uni[source];
return 0;
}
#endif
varargs string psyc_name(mixed source, vastring localpart) {
string s;
if (s = obj2unl[source]) return s;
#if DEBUG > 0
if (stringp(source))
raise_error("psyc_name called for string "+ source+ "\n");
#else
if (stringp(source)) return source;
#endif
#ifdef PARANOID
unless (objectp(source)) return 0;
#endif
unless (s = localpart) {
if (s = source->psycName()) {
if (abbrev("mailto:", s)) {
unl2obj[s] = source;
return obj2unl[source] = s;
}
} else s = file_name(source);
}
//
// since this is an outgoing UNL and we do not do
// virtual psyc hosting we should be
// allowed to leave out the myUNL here.
// since we need to recognize ourselves in _context messages
// even if our _source has been repatched, we need to know
// all our "canonical" names. so this isn't even enough.
// we probably need to our canonical hostname: myUNLCN.
//
#ifndef __HOST_IP_NUMBER__
// if (myUNLIP)
#endif
// unl2obj[myUNLIP +"/"+ s] = source;
// why store it with an ip? nobody uses that anyway!?
// is it being used anywhere in the parser? naaah.
s = myUNL + s;
unl2obj[s] = source;
return obj2unl[source] = s;
}
object psyc_object(string uniform) {
P3(("psyc_object(%O) in %O\n", uniform, unl2obj))
return unl2obj[uniform];
}
#ifndef FORK
object find_psyc_object(array(mixed) u) {
string t, r, svc, user;
object o;
user = u[UNick];
r = u[UResource];
if (r && strlen(r)) {
#if __EFUN_DEFINED__(trim)
# include <sys/strings.h>
r = trim(r, TRIM_RIGHT, '/');
#else
while (char_from_end(r, 1) == '/') r = slice_from_end(r, 0, 2);
#endif
if (strlen(r)) switch(r[0]) {
case '^':
case '~':
break;
case '$':
// target wird auf serv/args gesetzt
// weiss noch nicht ob das gut ist
t = r[1..];
unless (sscanf(t, "%s/%s", svc, r))
svc = t;
//P3(("find_service: %O for %O(%O)\n", o, svc, r))
if (o = find_service(lower_case(svc)))
break;
// unless (user) {
// croak("_failure_unavailable_service",
// "No service '[_service]' available here.", ([ "_service" : svc ]) );
// return restart();
// }
return 0; // TODO!
#ifndef __PIKE__
case '@':
// t[0..0] = PLACE_PATH;
r = PLACE_PATH + lower_case(r[1..]);
if (o = find_object(r)) break;
// should check for legal name instead
// of catch. TODO
catch(o = r -> load());
if (objectp(o)) break;
// fall thru
#endif
default:
o = find_object(r);
D2( if(!o)
D("OBJECT NOT FOUND: "+ r +"\n"); )
}
}
else unless (user) {
//return 0; // return SERVER_UNIFORM !?
return find_target_handler("/");
}
if (!objectp(o) && user) {
// psyc/parse used to do this here
o = summon_person(user); //, PSYC_PATH "user");
P2(("%O summoning %O: %O\n", ME, user, o))
}
return o;
}
#ifndef __PIKE__
// library transmits udp packets itself
#include "edit.i"
#endif
// target is lowercased already
int psyc_sendmsg(mixed target, string mc, mixed data, mapping vars,
int showingLog, mixed source, array(mixed) u) {
string sname, host, buf, room;
int port, usesrv = 1;
object ob;
mixed t;
unless (u[UHost]) {
#ifndef __PIKE__ // TPD
sendmsg(source, "_failure_unsupported_notation_location",
"PSYC server-independent uniform network "
"identificators not implemented yet.", 0, 0);
#endif
return 0;
}
#if DEBUG > 0
unless (stringp(mc)) {
P0(("psyc_sendmsg got mc == %O from %O.\n"
"probably a mistake when converting a walk_mapping.\n",
mc, previous_object()))
return 0;
}
#endif
sname = objectp(source) ? psyc_name(source) : sname;
// host = lower_case(u[UHostPort]);
// unless (u[URoot]) u[URoot] = "psyc://"+host;
// TODO: vars should be enforced system-wide
unless (mappingp(vars)) vars = ([ ]);
#ifndef FORK
// seid ihr euch wirklich sicher, dass ihr diese zeile entfernen wollt?
vars["_target"] = target;
// <lynX> this could help protect against sources who destruct while
// the message is in the queue. is it being used or is it okay to do
// this operation at enqueing time? in fact the templates who use it
// get it from psyctext() which resolves _source as source.. so this
// here should not be necessary.. then again we just calculated it
// so we don't want it to be calculated again later.. so we should
// rather adapt the other spots where it's used rather than here..
// after all it's mostly speed improvements.. no big thing.. TODO
vars["_source"] = sname;
#endif
unless (port = u[UPort]) port = u[UTransport] == "s" ?
PSYCS_SERVICE : PSYC_SERVICE;
else {
usesrv = 0;
if (port < 0) {
P2(("Minusport in %O or %O, _failure to %O || %O\n",
target, u[UHost], vars["_context"], source))
#ifndef __PIKE__ // TPD
sendmsg(vars["_context"] || source,
"_failure_network_connect_invalid_port",
"No connectable port known for [_source_relay].",
([ "_source_relay" : target || u[UHost] ]), ME);
// ME shouldn't be necessary! TODO
#endif
return 0;
}
}
host = lower_case(u[UHost]);
if (query_udp_port() == port && is_localhost(host)) {
// this happens when a psyc client sends to a local
// target that hasn't been incarnated yet...
ob = find_psyc_object(u);
// cache the resulting object for the url
if (ob) {
P2(("psyc_sendmsg registering %O for %O found by parsing uniform\n",
target, ob))
register_target(target, ob);
}
#ifndef __PIKE__ // TPD
return sendmsg(ob, mc, data, vars, source);
#endif
// or deliver directly?
}
// since the local URoot is in targets and pointing to net/root
// we have to get here *after* making sure we are not addressing
// a local entity.
P3(("looking for %O(%O) in %O..\n", target, u[UHostPort], targets))
// if (member(targets, t2 = u[URoot])) {
// t = targets[t2];
// if (t) {
if (t = targets[u[URoot]]) {
P2(("%O to be delivered on %O's circuit\n",
target, query_ip_name(t) || t ))
register_target(target, t);
// was delivermsg(
return t->msg(sname, mc, data, vars, 0, target);
// no more cleansing of targets mapping.. see also net/library.i
// } else {
// P1(("PSYC/TCP target %O gone!\n", t2))
// m_delete( targets, t2 );
// }
}
#ifndef __PIKE__
// okay so we have no existing connection..
// current rule of thumb to decide whether to open up a tcp
// also all localhost traffic should be handled by udp TODO
#ifdef _flag_enable_routing_UDP
if (u[UTransport] == "c" ||
# ifdef _flag_enable_routing_TLS
u[UTransport] == "s" ||
# endif
(!u[UTransport] && !abbrev("_notice", mc)))
#else
if (!u[UTransport] || u[UTransport] == "c"
# ifdef _flag_enable_routing_TLS
|| u[UTransport] == "s"
# endif
)
#endif
{
dns_resolve(host, (:
object o;
string hopo = $2;
string psychopo;
string psycippo = "psyc://"+ $1 +"/";
// if ($3 && $3 != PSYC_SERVICE) {
if ($9) {
hopo += ":"+$9;
psycippo += ":"+$9;
}
// hope it is correct to have a trailing slash here
psychopo = "psyc://"+ hopo +"/";
unless (o = find_target_handler(psycippo)) {
// we use psyc:host:port as an object name
// we can change that if it is confusing
#ifdef QUEUE_WITH_SCHEME
// this makes it look for psyc:host:port as its queue
o = ("psyc:"+hopo) -> circuit($2, $3, u[UTransport],
usesrv && "psyc", 0, systemQ, psychopo);
#else
// this makes it look for host:port as its queue
o = ("psyc:"+hopo) -> circuit($2, $3, u[UTransport],
usesrv && "psyc", hopo, systemQ, psychopo);
#endif
// SRV tag "psyc" is actively being checked, but
// don't rely on it.. just use it as a fallback if
// nothing else is possible, but some clients may
// no longer be able to connect to you...
}
register_target($4, o);
register_target(psychopo, o);
register_target(psycippo, o);
P2(("delivering %O(%O) over %O\n", hopo, $1, o))
P3(("targets = %O\n", targets))
// psyc/circuit.c will register psyc://IP:PORT at logon()
// the last thing missing is a way to register all CNAMEs
return o->msg($5, $6, $7, $8, 0, $4);
// ip=1 2 3 4 5 6 7 8 9
:),
#ifdef FORK
host, port, target, source, mc, data, vars, u[UPort]
#else
host, port, target, sname, mc, data, vars, u[UPort]
#endif
);
return 1;
}
else
#ifdef _flag_enable_routing_UDP
if (u[UTransport] && u[UTransport] != "d")
#endif
{
P1(("Invalid transport %O in %O, _failure to %O || %O\n",
u[UTransport], target, vars["_context"], source))
sendmsg(vars["_context"] || source,
"_failure_network_connect_invalid_transport",
"Unknown transport type '[_transport]' for [_source_relay].",
([ "_source_relay" : target || u[UHost],
"_transport": u[UTransport] ]), ME);
// ME shouldn't be necessary! TODO
return 0;
}
#ifdef _flag_enable_routing_UDP
// fall thru to UDP
# if DEBUG > 1
if (port) {
D(S("UDP[%s:%d] <= %O: %s\n", host, port, source, mc));
} else {
D(S("UDP[%s] <= %O: %s\n", host, source, mc));
}
# endif
#ifndef NEW_RENDER
// this produced wrong _length. please discontinue.
if (stringp(data) && strlen(data))
// why do we take guesses at data here? uncool!
data="\n"+data+ (data[strlen(data)-1] == '\n' ?
S_GLYPH_PACKET_DELIMITER "\n" :
"\n" S_GLYPH_PACKET_DELIMITER "\n");
else data="\n" S_GLYPH_PACKET_DELIMITER "\n"; // TODO? look up textdb.
// look! MMP-conformant support of the _context variable!
if (room = vars["_context"]) {
// this may have to change into a full psyc: URL
if (objectp(room)) room = psyc_name(room);
buf = S_GLYPH_PACKET_DELIMITER "\n"
# ifdef PRE_SPEC
":_source\t"+ sname +"\n"
# else
":_source_relay\t"+ sname +"\n"
# endif
+ ":_context\t"+ room +"\n";
} else
buf = S_GLYPH_PACKET_DELIMITER "\n"
":_source\t"+ sname +"\n"
":_target\t"+ target +"\n";
t = psyc_render(source, mc, data, vars, showingLog, target);
unless (t) return 0;
buf += t;
#else
buf = psyc_render(source, mc, data, vars, showingLog, target);
unless (buf) return 0;
#endif /* NEW_RENDER */
if (is_localhost(host)) return send_udp(host, port, buf);
PT(("dns_resolve + send_udp %O:%O packet:\n%s", host,port,buf))
dns_resolve(host, (: if (stringp($1))
send_udp($1, $2, $3);
else
// if your driver complains about vars being
// undefined at this point, you are probably
// running an ldmud 3.2 which is not compatible
// with psyced. pick a newer major version pls
sendmsg(vars["_context"] || source,
"_failure_network_send_resolve",
"[_source_host] for [_source_relay] does not resolve.",
([ "_source_host" : host,
"_source_relay" : target||host ]), ME);
return; :), port, buf);
return 1;
#endif /* _flag_enable_routing_UDP */
#endif // PIKE
}
#endif
/* this breaks /connect ...
object createUser(string nick) {
PT(("creating " PSYC_PATH "user for "+ nick +"\n"))
return named_clone(PSYC_PATH "user", nick);
}
*/