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psyced/world/net/d/psyc.c
2009-03-04 00:40:26 +01:00

700 lines
20 KiB
C

// vim:foldmethod=marker:syntax=lpc:noexpandtab
// this whole file is a mistake... and not in use...
#ifdef FORK // {{{
#include <net.h>
#include <uniform.h>
#include <services.h>
inherit NET_PATH "state";
inherit NET_PATH "queue2";
#include "../psyc/edit.i"
string psycName() { return ""; }
varargs mixed find_psyc_object(string t, object connection, array(mixed) u) {
string r, svc, user;
object o;
PT((">> t: %O\n", t))
unless (strlen(t) && u = (u || parse_uniform(t))) return 0;
//unless (u[UScheme] && u[UScheme] == "psyc") {
unless (u[UScheme] && strlen(u[UScheme])) {
if (connection)
connection -> w("_failure_unsupported_target_relative",
"No support for relative targets yet.");
return 0;
//QUIT
}
unless (u[UHost] && strlen(u[UHost])) {
if (connection)
connection -> w("_failure_unsupported_notation_location",
"No support for fancy UNLs yet.");
return 0;
//QUIT
}
// TODO: croak if host:port isnt us?
// or implement proxy service?
// do any checking for gateway schemes?
user = u[UUser];
r = u[UResource];
if (r && strlen(r)) {
#if __EFUN_DEFINED__(trim)
# include <sys/strings.h>
r = trim(r, TRIM_RIGHT, '/');
#else
while (r[<1] == '/') r = r[..<2];
#endif
if (strlen(r)) switch(r[0]) {
case '^':
case '~':
if (user) {
if (connection)
connection -> w("_error_invalid_uniform_user_duplicate",
"Two users in uniform not allowed here.");
// QUIT
return 0;
}
user = r[1..];
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) {
if (connection)
connection -> w("_failure_unavailable_service",
"No service '[_service]' available here.", ([ "_service" : svc ]) );
return 0;
}
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());
// fall thru
default:
o = find_object(r);
D2( if(!o)
D("OBJECT NOT FOUND: "+ r +"\n"); )
}
else unless (user) return 0;
if (user && !objectp(o)) {
o = summon_person(user);
// o = find_person(user);
// unless(o) o = createUser(user);
}
}
return o;
}
// new psyc-parser to fit the needs ot the new api. operates on _one_ string
// containing _one_ paket (everything after the mc is considered the data)
//
// returns the mc, psyc-data remains in the buffer.
#define ERROR(x) { monitor_report("_error_broken_syntax", x+((connection) ? sprintf(" from %O.", connection) : ".")); return 0; }
//#define ERROR(x) { monitor_report("_error_broken_syntax", x); return 0; }
static string spsyc_parse(string buf, mapping vars, int iscontext, string source,
object connection, object o) {
string mod, var, val, mc, line, lastmod, lastvar;
mixed lastval;
int a = 0, b;
while (a < strlen(buf) && !mc && ((b = strstr(buf, "\n", a)) != -1
|| b = strlen(buf))) {
val = "";
line = buf[a..b-1];
switch(buf[a]) {
case ':':
case '=':
case '+':
case '-':
unless (sscanf(line, "%1.1s%s%t%s", mod, var, val)
|| sscanf(line, "%1.1s%s", mod, var)) {
if (connection)
connection -> w("_error_broken_syntax",
"You are in league with Ratzinger,\
the evil lord or broken psyc.");
// <lynX> runtime error erzeugen!?? wie kommt ihr darauf
// das sei eine gute idee? damit man nen grund hat große
// teure catches zu machen? ich will in meinen logs nur
// runtime fehler von bugs - ist schon schlimm genug das
// schrottige http-zugriffe sowas auslösen, aber logs
// voller fehler von buggy psyc implementationen, nein!
// man sagt der gegenseite dass was faul ist, killt evtl
// die verbindung falls der fehler nicht recoverbar ist,
// reported oder loggt das problem, aber dann is gut!
ERROR(S("PSYC parsing failed in '%s'", line))
}
unless (sizeof(var)) {
if (mod == "-") {
if (connection)
connection -> w("_error_broken_syntax",
"Diminishing of lists is not supported.");
ERROR("PSYC parsing failed (Invalid list diminish)")
} else unless (lastvar) {
if (connection)
connection -> w("_error_broken_syntax",
"Wrong list continuation.");
ERROR("PSYC parsing failed (Invalid list continuation)")
} else unless (lastmod == mod) {
if (connection)
connection -> w("_error_broken_syntax",
"Inconsistent list continuation. Do not mix modifiers.");
ERROR("PSYC parsing failed (Invalid list continuation)")
}
if (pointerp(lastval)) {
lastval += ({ val });
} else {
lastval = ({ lastval, val });
}
a = b+1;
continue;
}
break;
case '\t':
unless (lastvar) {
if (connection)
connection -> w("_error_broken_syntax",
"Continuation without variable.");
ERROR("PSYC parsing failed (Invalid variable continuation)")
}
if (pointerp(lastval))
lastval[<1] += "\n"+line[1..];
else lastval += "\n"+line[1..];
a = b+1;
continue;
case '_':
int i;
for (i = b - a - 1; i>=0; i--) {
unless (line[i] == '_' ||
(line[i] >= 'a' && line[i] <= 'z') ||
(line[i] >= '0' && line[i] <= '9') ||
(line[i] >= 'A' && line[i] <= 'Z')) {
if (connection)
connection -> w("_error_illegal_method",
"[_method] is not a valid method name.",
([ "_method" : line ]));
ERROR("PSYC parsing failed (Invalid method '"
+ line +"')\n")
}
}
mc = line;
switch(mc) {
case "_conversation": // we will soon have to decide its
case "_converse": // final name...
case "_talk":
mc = "_message";
break;
default:
if (abbrev("_conversation", mc)) {
mc[..12] = "_message";
} else if (abbrev("_converse", mc)) {
mc[..8] = "_message";
} else if (abbrev("_talk", mc)) {
mc[..4] = "_message";
}
}
break;
default:
if (connection)
connection -> w("_error_broken_syntax",
"Unsupported modifier '[_modifier]'",
([ "_modifier" : line[0] ]));
ERROR("PSYC parsing failed (Unknown modifier '"
+ line[0] + "')")
}
if (lastmod) switch(lastmod[0]) {
case '=':
if (o)
o -> Assign(source, lastvar, lastval, iscontext);
case ':':
vars[lastvar] = lastval;
break;
case '+':
if (o)
o -> Augment(source, lastvar, lastval, iscontext);
break;
case '-':
if (o)
o -> Diminish(source, lastvar, lastval, iscontext);
break;
}
lastmod = mod;
lastvar = var;
lastval = val;
a = b+1;
}
unless (mc) {
// malformed psyc-packet in buf. get on it!
if (connection)
connection -> w("_error_broken_syntax",
"Received packet without method.");
ERROR("PSYC parsing failed (Method missing)")
}
if (strlen(buf) == b) { // no data. packet ends with mc
buf = "";
} else {
// still data in buf. buf[b] is the last \n before the psyc-data
buf = buf[b+1..];
}
return mc;
}
// not exactly beautiful to have it here, but still more efficient than
// having hordes of if (psycd) checks..
int deliver(mixed ip, string peerip, object connection, string peeraddr,
string host, string data, mapping mvars) {
string psycaddr;
PT(("deliver(%O, %O, %O, %O)\n", ip, host, data, mvars))
mixed o, target = mvars["_target"];
int trustworthy = (member(mvars, "_INTERNAL_trust"))
? to_int(mvars["_INTERNAL_trust"])
: 0;
if (ip == -1) {
monitor_report("_error_something_because_somebody_was_once_again_too_lazy_to_look_up_a_method_which_most_likely_already_exists_in_library_dns_c", S("%O could not resolve %O.",
ME, host));
if (objectp(connection))
connection->w("_error_invalid_host", "Could not resolve [_host].",
([ "_host": host ]));
return 1;
}
if (ip && ip != peerip) {
monitor_report("_warning_rejected_relay_incoming",
"Dropped a packet from "+ peerip +
" trying to relay for "+ host);
P0(("Dropped a packet from "+ peerip +
" trying to relay for "+ host +"\n"+
" in parse:deliver(%O, %O, %O, %O)\n",
ip, host, data, mvars))
if (connection)
connection->w("_error_rejected_relay_incoming",
"You are not allowed to relay for [_host].",
([ "_host": host ]));
return 1;
} else if (psycaddr = mvars["_context"] || mvars["_source"]) {
// schmorp??
if (connection)
// is psycaddr already lc?
register_target(lower_case(psycaddr), connection);
} else psycaddr = "psyc://"+peeraddr;
if (member(mvars, "_source_identification")) {
mixed t = lookup_identification(psycaddr,
mvars["_source_identification"]);
unless (t) {
// the i: is a safety measure in case of a supergau
// that mvars["_source_identification"] could somehow resemble
// some other queue in the system.. not convinced..
// see also two more occurences in this file.
//
string n = "i:"+mvars["_source_identification"]+psycaddr;
unless (qExists(n)) qInit(n, 100, 5);
enqueue(n, ({ ip, peerip, connection, peeraddr, host, data,
mvars }));
return 0;
} else if (t == mvars["_source_identification"]) {
// TODO: increase trustworthy ness
mvars["_source_technical"] = psycaddr;
mvars["_source"] = mvars["_source_identification"];
m_delete(mvars, "_source_identification");
} else {
PT(("someone (%O) claims an identification (%O) though he is "
"already"
" registered as someone else. Will we allow multiple"
" identifications per unl? Should - in theory - be possible"
" and okay. dropping this message.\n",
psycaddr, mvars["_source_identification"]))
return 0;
}
}
{
string state, err, mc;
mixed source, t;
mixed *u;
int iscontext = 0; // if we are in context-state
mapping psycvars = ([ "_INTERNAL_origin" : connection ]);
// this is our new context-routing without target.
// 1 _source
// 2 _target
// 4 _context
switch(
(member(mvars, "_source") ? 1 : 0) |
(member(mvars, "_target") ? 2 : 0) |
(member(mvars, "_context") ? 4 : 0)
) {
case 5:
# if DEBUG > 0
PT(("Received both context(%s) and source(%s) from %O\n",
mvars["_context"], mvars["_source"], psycaddr))
# endif
case 4:
t = mvars["_context"];
state = t;
iscontext = 1;
o = find_context(t);
unless (o) {
// no one is interested / online
// is this an abuse or a feature?
// fippo: feature, context may be 0
// if no one who is normally listening is online
PT(("Dropped messages from %s because there was no\
context slave for %s.\n",
psycaddr, mvars["_context"]))
return 1;
}
break;
case 6: // this is unicast from context to target in the context's
// state
state = mvars["_context"];
iscontext = 1;
case 3:
// "Link to [_source] established.. uses this
// and place/slave too (although improperly)
//m_delete(mvars, "_source");
unless (iscontext) {
source = lower_case(mvars["_source"]);
state = source;
}
case 2:
t = mvars["_target"];
// this is a message from the rootobj but since its target is
// not our rootmsg we need to offer some kind of source.
// TODO: Why not use ME here ??
unless (source)
source = psycaddr;
if (trustworthy > 7) {
P2(("%O relaying permitted for %O to %O via %O\n",
ME, source, t, o))
// We should do mmp-routing here.. but find out before if
// there is any connections registered for that target/host
}
u = parse_uniform(t);
if (u && (u[UResource] == "" || !u[UResource])) {
// rootMSG. that parse_uniform makes me quite unhappy.
// we may check the string t only for the existance of a
// resource since we allready know that it is a valid url.
// TODO
} else unless (o = psyc_object(t) || find_psyc_object(t)) {
PT(("Found no recipent for %O. Dropping message.\n", t))
return 1;
}
break;
case 1:
// this is a message to our rootmsg from someone
source = lower_case(mvars["_source"]);
break;
case 0:
// going to our rootmsg from hell
source = psycaddr;
break;
default:
PT(("Unimplemented routing-scheme (_source, _target and _context are all present)\n"))
return 1;
}
// can this safely move into one of the ifs above? TODO
if (t = mvars["_source_relay"]) {
if (t = psyc_object(t)) {
P2(("local _source_relay %O from %O, cont %O\n",
t, source, mvars["_context"]))
mvars["_source_relay"] = t;
}
}
unless (mc = spsyc_parse(&data, psycvars, iscontext, state,
connection, o)) {
if (connection)
destruct(connection);
return 1;
}
# ifdef PSYC_TCP
P2(("TCP[%s] => %O: %s\n", peeraddr, o || t, mc))
# else
PT(("UDP[%s] => %O: %s\n", peeraddr, o || t, mc))
# endif
# ifndef GOOD_IDEA
// why do we parse for auth mcs here if we already do it
// in common::rootMsg? if this should be here instead,
// you can make these checks a bit more efficient if
// you first ensure that the target of this message is
// the server root. it's also nicer to the users that
// you're not looking at their messages here.. ;)
//
if (mc == "_error_invalid_authentication") {
string n;
unless (member(mvars, "_source") &&
member(psycvars, "_location")) {
PT(("got _error_invalid_authentication without proper"
"vars.\n"))
return 0;
}
n = "i:"+mvars["_source"]+psycvars["_location"];
unless (qExists(n)) {
PT(("got _error_invalid_authentication for something we "
"never requested.\n"))
return 0;
}
sendmsg(psycvars["_location"], "_error_invalid_source_identification",
"Your identification [_location] seems to be bogus. "
"Du kommst hier ned rein!\n",
([ "_location" : mvars["_source"]]));
qDel(n);
return 1;
} else if (mc == "_notice_authentication") {
string n;
unless (member(mvars, "_source") &&
member(psycvars, "_location")) {
PT(("got _notice_authentication without proper"
"vars.\n"))
return 0;
}
n = "i:"+mvars["_source"]+psycvars["_location"];
unless (qExists(n)) {
PT(("got _notice_authentication for something we "
"never requested.\n"))
return 0;
}
register_location(psycvars["_location"], mvars["_source"]);
while (qSize(n))
apply(#'deliver, shift(n));
return 1;
}
# endif
// we could put these mmp-vars into cvars only to avoid this loop
foreach (string key : mvars) {
if (mergeRoutingVar(key))
psycvars[key] = mvars[key];
}
PT(("deliver ending with target: %O and mc: %O\n", o, mc))
if (objectp(o))
o -> msg(source, mc, (data == "" ? 0 : data), psycvars, 0,
source);
else if (connection) {
// per-connection "server root" which actually handles
// connection feature negotiation
connection -> rootMsg(source, mc, data == "" ? 0 : data,
psycvars, source);
}
return 1;
}
}
/*
* wrong order of arguments.. elsaga: how did this ever work!?
int msg(mixed target, string mc, mixed data, mapping vars,
mixed source, mixed target2) {
*/
int msg(mixed source, string mc, mixed data, mapping vars,
mixed showingLog, mixed target) {
string sname;
int port;
string user, host, obj;
string buf, room;
object o;
mixed t;
array(mixed) u = parse_uniform(target);
unless (u[UHost]) {
sendmsg(source, "_failure_unsupported_notation_location",
"PSYC server-independent uniform network "
"identificators not implemented yet.", 0, 0);
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 = psyc_name(source);
// host = lower_case(u[UHostPort]);
// unless (u[URoot]) u[URoot] = "psyc://"+host;
// TODO: no need for vars
unless (mappingp(vars)) vars = ([ ]);
P3(("looking for %O(%O) in %O..\n", target, u[UHostPort], targets))
// if (member(targets, t2 = u[URoot])) {
// t = targets[t2];
// if (t) {
unless (port = u[UPort]) port = PSYC_SERVICE;
else if (port < 0) {
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
return 0;
}
host = lower_case(u[UHost]);
user = u[UUser];
obj = u[UResource];
// was: obj = u[UResource];
// but probably caused the erratic rootMsg() events
//obj = u[UUser] ? "~" + u[UUser] : u[UResource];
//
// if (host == SERVER_HOST) host = "127.0.0.1";
#if 1
//
// at this point i should be able to recognize targets which are my own!
// net/gateway/aim would use that.. TODO
//
// see also legal_domain and legal_host
if (query_udp_port() == port && (host == "127.0.0.1"
|| host == "127.1"
#ifdef __HOST_IP_NUMBER__
|| host == __HOST_IP_NUMBER__
#else
|| host == myIP
#endif
// || host == SERVER_HOST
// || lower_case(host) == myLowerCaseHost
|| host == my_lower_case_host() || host == "localhost")) {
if (stringp(obj)) {
if (obj[<1] == '/') obj = obj[..<2];
if (strlen(obj)) switch(obj[0]) {
case '^':
case '~':
unless(user) user = obj[1..];
break;
case '$':
// no services available yet
// but here's the support for them
obj[0..0] = "/service/";
break;
case '@':
// t[0..0] = PLACE_PATH;
obj = PLACE_PATH + lower_case(obj[1..]);
if (o = find_object(obj)) break;
// should check for legal name instead
// of catch. TODO
catch(obj -> load());
// fall thru
default:
o = find_object(obj);
D2( if(!o) D(S("OBJECT NOT FOUND: %O\n", t)); )
} else unless(user) {
// rootMsg(source, mc,
// buffer == "" ? 0 : buffer, cvars);
return 0;
}
}
// user@ is ignored if /@ or /~ is given..
if (user && !objectp(o)) {
o = summon_person(user); //, PSYC_PATH "user");
//o = find_person(user);
//unless(o) o = createUser(user);
}
// cache the resulting object for the url
register_target(lower_case(target), o);
return sendmsg(o, mc, data, vars, source);
// or deliver directly?
}
#endif
// 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
unless (u[UTransport] == "d" || abbrev("_notice", mc)) {
#endif
dns_resolve(host, (:
object o;
string addr = $1;
string hopo = $2;
string psycaddr = "psyc://"+ addr;
// if ($3 && $3 != PSYC_SERVICE) {
if ($9) {
hopo += ":"+$9;
addr += ":"+$9;
}
unless (o = find_target_handler(psycaddr)) {
o = ("psyc:"+hopo) -> circuit($2, $3, 0, "psyc", 0,
system_queue());
}
register_target($4, o);
register_target("psyc://"+hopo, o);
register_target(psycaddr, o);
P2(("delivering %O(%O) over %O\n", hopo, $1, o))
// 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
:),
host, port, target, sname, mc, data, vars, u[UPort]
);
return 1;
#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
if (objectp(source)) buf = make_psyc(mc, data, vars, source);
else buf = make_psyc(mc, data, vars);
buf = make_mmp(buf, vars);
if (host == "localhost") return send_udp(host, port, buf);
P3(("send_udp %O:%O packet:\n%O", host,port,buf))
dns_resolve(host, (: if ($2 < 0) {
send_udp($1, $2, $3);
}
return; :), port, buf);
return 1;
#endif /* _flag_enable_routing_UDP */
}
object load() {
return ME;
}
int outstate() {
return 1;
}
mapping state() {
return ([]);
}
void create() {
qCreate();
}
#endif // }}}