mirror of
git://git.psyced.org/git/psyced
synced 2024-08-15 03:25:10 +00:00
338 lines
10 KiB
C
338 lines
10 KiB
C
// $Id: master.c,v 1.67 2008/01/05 12:42:17 lynx Exp $ // vim:syntax=lpc
|
|
//
|
|
// part of the PSYC multicast implementation strategy. accepts remote slave
|
|
// rooms to link into here. the point is to not have the traffic of every
|
|
// single user entering and leaving. if you like that, the automatic and
|
|
// transparent group/master and slave does the job for you. these two
|
|
// distribution systems co-exist and in fact together create a very
|
|
// scalable multicast solution without using the "IP Multicast" protocol.
|
|
//
|
|
#include <net.h>
|
|
#ifdef ORIGINAL_MASTERS
|
|
|
|
#include <status.h>
|
|
#include <driver.h>
|
|
#ifdef WE_PROBABLY_DONT_NEED_THIS
|
|
# include <uniform.h>
|
|
#endif
|
|
|
|
virtual inherit NET_PATH "place/storic";
|
|
|
|
private volatile mapping l;
|
|
private volatile int netppl;
|
|
|
|
qJunction() { return 0; }
|
|
|
|
isLink(source) {
|
|
P2(("isLink %O in %O: %O\n", source, l, l[source]))
|
|
return member(l, source);
|
|
}
|
|
|
|
histClear(a, b, source, vars) {
|
|
if (b < 50) return;
|
|
netmsg(ME, "_notice_place_history_cleared", "--", ([
|
|
"_amount_messages" : a ]) );
|
|
// invisible msg
|
|
return ::histClear(a, b, source, vars);
|
|
}
|
|
|
|
netsize() { return netppl+size(); }
|
|
|
|
save() {
|
|
if (l) {
|
|
vSet("links", l);
|
|
P2(("saving links: %O\n", v("links")))
|
|
}
|
|
return ::save();
|
|
}
|
|
|
|
reboot(reason, restart, pass) {
|
|
if (mappingp(l)) {
|
|
if (restart)
|
|
netmsg(ME, "_notice_unlink_shutdown_temporary",
|
|
"Server restart in progress. Connection to [_source] dismantled.",
|
|
([]));
|
|
else
|
|
netmsg(ME, "_notice_unlink_shutdown",
|
|
"Server shutdown in progress. Connection to [_source] dismantled.",
|
|
([]));
|
|
l = 0;
|
|
}
|
|
// would destruct junctions before slave::reboot() has been called?
|
|
// no.. because we no longer selfdestruct in reboot
|
|
return ::reboot(reason, restart, pass);
|
|
}
|
|
|
|
load(a) {
|
|
mixed rc;
|
|
rc = ::load(a);
|
|
unless(l) {
|
|
netppl=0;
|
|
#if 1
|
|
// die frage lautet: wollen wir das?
|
|
// ja, dann bleiben alle slaves up to date
|
|
// und sollte ein temporärer dabei sein, fliegt er hiermit raus
|
|
l = v("links");
|
|
if (mappingp(l)) {
|
|
P2(("reestablishing links: %O\n", l))
|
|
netmsg(ME, "_notice_unlink_restart_complete",
|
|
"Connection to [_source] reestablished.", ([]));
|
|
}
|
|
// wir lassen uns jeden link mit nem _request_link vom slave bestätigen
|
|
// also wird "l" nach gebrauch gelöscht!
|
|
#endif
|
|
l = ([]);
|
|
}
|
|
return rc;
|
|
}
|
|
static eachppl(link, size) { netppl += to_int(size); }
|
|
|
|
msg(source, mc, data, mapping vars) {
|
|
P2(("master:msg(%O, %O, %O, %O)\n", source, mc, data, vars))
|
|
if (stringp(source)) {
|
|
string relay;
|
|
int isli = member(l, source);
|
|
P2(("%O isli:%O source:%O links:%O\n", ME, isli, source, l))
|
|
#if 1 // is this stuff doing something useful?
|
|
if (!(qJunction() && stringp(vars["_source_relay"])
|
|
&& is_formal(vars["_source_relay"]))
|
|
&& isli && (relay = vars["_source_relay"])) {
|
|
//if (isli && (relay = vars["_source_relay"])) {
|
|
#if 0 //def WIR_TESTEN
|
|
P0(("%O: source %O (%O) und relay %O (%O) vertauscht\n", ME,
|
|
source, vars["_source"], relay, vars["_source_relay"]))
|
|
#else
|
|
P1(("%O: source %O und relay %O vertauscht\n", ME,
|
|
source, relay))
|
|
#endif
|
|
// one day we will have to take heed who has the
|
|
// privilege of linking us, as this is again a
|
|
// nice chance for spoofing.. but then again if someone
|
|
// dares to, he quickly ends up on the blacklist
|
|
// TODO: we need to check when exactly we need that
|
|
// or optimize on source == source_relay
|
|
// on link level
|
|
vars["_source_relay"] = source;
|
|
source = relay;
|
|
} else
|
|
#endif
|
|
switch(mc) {
|
|
// should also handle _request_enter i suppose
|
|
case "_request_link":
|
|
// when source is an ip number we could do a 10 second
|
|
// call_out and retry after resolving that ip number..
|
|
// or we expect all links to resolve at psyc negotiation
|
|
// time before getting here.. better solution..
|
|
unless(isli) {
|
|
// save();
|
|
//unless (qSilent()) // || v("quiet"))
|
|
monitor_report("_notice_link_report",
|
|
S("%O linked by %s (%O)", ME, source, l[source]));
|
|
// let ppl in room see what's happening..?
|
|
// this also goes out to all links, thus serves also as echo
|
|
// but this requires fiddling around on the linked slave whether its an
|
|
// controlmsg... so we simply send it separately
|
|
// reminds of _notice_place_enter* in place/basic
|
|
// could send identification here for junctions?
|
|
unless(v("_filter_presence"))
|
|
castmsg(source, "_notice_link_topic",
|
|
"Link to [_source] established. [_topic]",
|
|
([ "_topic" : (v("topic") || "") ]) );
|
|
sendmsg(source, "_notice_link",
|
|
"Link to [_source] established.", ([
|
|
"_topic" : v("topic") || "",
|
|
// "_filter_conversation" : v("_filter_conversation"),
|
|
"_filter_presence" : v("_filter_presence")
|
|
]));
|
|
} else {
|
|
P1(("%O link update: %s in %s\n", ME,l[source],source))
|
|
}
|
|
l[source] = vars["_amount_members"];
|
|
unless(isli) save();
|
|
// netppl=0; walk_mapping(l, "eachppl", ME);
|
|
return 1;
|
|
case "_error_rejected_message_membership":
|
|
// TODO: the place does not remember us...
|
|
// maybe it does not want to get our news.
|
|
// treat it like an unlink?
|
|
case "_request_unlink":
|
|
if (member (l, source)) {
|
|
P1(("%O unlinked by %s (%O)\n", ME,source,l[source]))
|
|
m_delete(l, source);
|
|
save();
|
|
sendmsg(source, "_notice_unlink",
|
|
"Link to [_source] dropped.");
|
|
} else
|
|
D(S("%O got unexpected unlink from %s (%O)\n",
|
|
ME, source, vars));
|
|
netppl=0; walk_mapping(l, "eachppl", ME);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
#ifdef WE_PROBABLY_DONT_NEED_THIS
|
|
if (stringp(source)) {
|
|
string host;
|
|
|
|
host = parse_uniform(source, 1)[UHost];
|
|
|
|
unless (chost(host)) {
|
|
dns_resolve(host,
|
|
(:
|
|
register_host($6, $1);
|
|
|
|
if ($1 != -1) {
|
|
::msg($2, $3, $4, $5);
|
|
debug_message(sprintf("MASTER: %O resolves to %O\n", $6, $1));
|
|
} else {
|
|
debug_message(sprintf("MASTER: %O does not resolve. ignoring. (closure).\n", $6));
|
|
}
|
|
return; :), source, mc, data, vars, host);
|
|
return;
|
|
} else if (chost(host) == -1) {
|
|
P1(("MASTER: %O does not resolve. ignoring.\n", host))
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return ::msg(source, mc, data, vars);
|
|
}
|
|
|
|
volatile string lastlink;
|
|
|
|
localmsg(source, mc, data, mapping vars) {
|
|
if (mappingp(vars)) {
|
|
m_delete(vars, "_amount_members");
|
|
m_delete(vars, "_amount_servers");
|
|
} else vars = ([]);
|
|
::castmsg(source, mc, data, vars);
|
|
}
|
|
|
|
#if 1
|
|
static eachlink(link, size, source, mc, data, vars) {
|
|
// we don't send to empty slaves..
|
|
// but for now we let them stay linked
|
|
// we could as well delete them.. hmm TODO
|
|
// and what about keeping history, topic and
|
|
// other control information in sync?
|
|
// okay.. it's not that simple
|
|
//unless (size) return;
|
|
|
|
unless (sendmsg(link, mc, data, vars, source)) {
|
|
// when send_udp fails, we get to know this at the *next* attempt
|
|
// to send a message. at least that's what the linux kernel seems to do
|
|
// most important thing, if it happens we need to resend the packet!
|
|
//P0(("%O: transmission damaged to %s (%O)\n", ME, link, size))
|
|
monitor_report("_failure_damaged_transmission", S("%O: transmission damaged to %s (%O)", ME, link, size));
|
|
unless (sendmsg(link, mc, data, vars, source)) {
|
|
D2( D("ERROR! resend failed a priori. this shouldn't happen.\n"); )
|
|
// if we got here, then we are probably not running linux
|
|
// let's assume this link is really broken and remove it
|
|
m_delete(l, link);
|
|
} else if (lastlink) {
|
|
// resend was successful, supposedly, or it didnt generate an immediate error
|
|
// so we can look into deleting the link that actually caused the problem
|
|
// on linux that's the one we sent something to *before*
|
|
|
|
if (l[lastlink]) {
|
|
l[lastlink] = 0; // give it one more try
|
|
} else {
|
|
P0(("transmission damaged to %s, removed probable cause of trouble: %s\n", link, lastlink))
|
|
m_delete(l, lastlink);
|
|
}
|
|
}
|
|
}
|
|
lastlink = link;
|
|
}
|
|
#endif
|
|
|
|
netmsg(source, mc, data, mapping vars) {
|
|
mapping myv;
|
|
|
|
#if 0 //def DRIVER_HAS_INLINE_CLOSURES
|
|
vars["_amount_members"] = netppl+size();
|
|
vars["_amount_servers"] = 1+sizeof(l);
|
|
walk_mapping(l, (: sendmsg($1, $3,$4,$5,$6) :),
|
|
mc,data,vars,source );
|
|
D("using closure\n");
|
|
#else
|
|
|
|
#ifdef QUIET_REMOTE_MEMBERS
|
|
if (abbrev("_notice_place_enter", mc)) return;
|
|
if (abbrev("_notice_place_leave", mc)) return;
|
|
#endif
|
|
|
|
myv = vars + ([
|
|
"_amount_members": netppl+size(),
|
|
"_amount_servers": 1+sizeof(l),
|
|
]);
|
|
lastlink = 0;
|
|
// here you can see some pre-foreach LPC code :)
|
|
walk_mapping(l, #'eachlink, source, mc, data, myv);
|
|
#endif
|
|
}
|
|
|
|
castmsg(source, mc, data, mapping vars) {
|
|
// TODO: psyc 1.1 / context oriented thingies will want to set
|
|
// context for the delivery to the slaves
|
|
// WHAT about junctions? will they set themselves as context
|
|
// aswell?
|
|
if (l) {
|
|
P2(("master:castmsg(%O,%O) w/_context %O and _nick_place %O\n",
|
|
source, mc, vars["_context"], vars["_nick_place"]))
|
|
// why is this necessary here again?
|
|
// and shouldn't it be the identification rather than ME?
|
|
vars["_context"] = ME;
|
|
// this one's even worse
|
|
vars["_nick_place"] = MYNICK;
|
|
netmsg(source, mc, data, vars);
|
|
}
|
|
localmsg(source, mc, data, vars);
|
|
}
|
|
|
|
memberInfo(person) {
|
|
if (netppl) {
|
|
unless (person) person = previous_object();
|
|
sendmsg(person, "_status_place_net_members_amount",
|
|
"[_nick_place] contains [_amount_members] people \
|
|
on [_amount_servers] servers.", ([
|
|
"_nick_place": MYNICK,
|
|
"_amount_members": netppl+size(),
|
|
"_amount_servers": 1+sizeof(l),
|
|
]) );
|
|
// return 0;
|
|
}
|
|
return ::memberInfo(person);
|
|
}
|
|
|
|
#if 0
|
|
showStatus(person, al, mc, data, vars) {
|
|
::showStatus(person, al, mc, data, vars);
|
|
if (l && al) walk_mapping(l, "eachstatus", ME, person);
|
|
return 1;
|
|
}
|
|
#else
|
|
cmd(a, args, b, source, vars) {
|
|
if (b) switch(a) {
|
|
case "links":
|
|
case "li":
|
|
if (sizeof(args) > 1) return 0;
|
|
if (l) walk_mapping(l, "eachstatus", ME, source);
|
|
return 1;
|
|
}
|
|
return ::cmd(a, args, b, source, vars);
|
|
}
|
|
#endif
|
|
static eachstatus(link, size, person) {
|
|
sendmsg(person, "_status_place_link_slave",
|
|
"Link [_link] has [_amount_members] members.",
|
|
([ "_link": link, "_amount_members": size ]) );
|
|
}
|
|
|
|
mixed isValidRelay(mixed x) { return x == ME || member(l, x); }
|
|
|
|
#else
|
|
# include "storic.c"
|
|
#endif
|