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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
/* $ModDesc: Provides a spanning tree server link protocol */
#include "inspircd.h"
#include "m_spanningtree/main.h"
#include "m_spanningtree/utils.h"
#include "m_spanningtree/treeserver.h"
#include "m_spanningtree/treesocket.h"
/* $ModDep: m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/treesocket.h */
const std::string ModuleSpanningTree::MapOperInfo(TreeServer* Current)
{
time_t secs_up = ServerInstance->Time() - Current->age;
return (" [Up: " + TimeToStr(secs_up) + " Lag: " + (Current->rtt == 0 ? "<1" : ConvToStr(Current->rtt)) + "ms]");
}
// WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
void ModuleSpanningTree::ShowMap(TreeServer* Current, User* user, int depth, char matrix[250][250], float &totusers, float &totservers)
{
ServerInstance->Logs->Log("map",DEBUG,"ShowMap depth %d totusers %0.2f totservers %0.2f", depth, totusers, totservers);
if (line < 250)
{
for (int t = 0; t < depth; t++)
{
matrix[line][t] = ' ';
}
// For Aligning, we need to work out exactly how deep this thing is, and produce
// a 'Spacer' String to compensate.
char spacer[80];
memset(spacer,' ',sizeof(spacer));
if ((80 - Current->GetName().length() - depth) > 1) {
spacer[80 - Current->GetName().length() - depth] = '\0';
}
else
{
spacer[5] = '\0';
}
float percent;
char text[250];
/* Neat and tidy default values, as we're dealing with a matrix not a simple string */
memset(text, 0, sizeof(text));
if (ServerInstance->Users->clientlist->size() == 0)
{
// If there are no users, WHO THE HELL DID THE /MAP?!?!?!
percent = 0;
}
else
{
percent = ((float)Current->GetUserCount() / (float)ServerInstance->Users->clientlist->size()) * 100;
}
const std::string operdata = IS_OPER(user) ? MapOperInfo(Current) : "";
snprintf(text, 249, "%s (%s)%s%5d [%5.2f%%]%s", Current->GetName().c_str(), Current->GetID().c_str(), spacer, Current->GetUserCount(), percent, operdata.c_str());
totusers += Current->GetUserCount();
totservers++;
strlcpy(&matrix[line][depth], text, 249);
line++;
for (unsigned int q = 0; q < Current->ChildCount(); q++)
{
if ((Current->GetChild(q)->Hidden) || ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str()))))
{
if (IS_OPER(user))
{
ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!IS_OPER(user))) ? depth : depth+2,matrix,totusers,totservers);
}
}
else
{
ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!IS_OPER(user))) ? depth : depth+2,matrix,totusers,totservers);
}
}
}
}
// Ok, prepare to be confused.
// After much mulling over how to approach this, it struck me that
// the 'usual' way of doing a /MAP isnt the best way. Instead of
// keeping track of a ton of ascii characters, and line by line
// under recursion working out where to place them using multiplications
// and divisons, we instead render the map onto a backplane of characters
// (a character matrix), then draw the branches as a series of "L" shapes
// from the nodes. This is not only friendlier on CPU it uses less stack.
int ModuleSpanningTree::HandleMap(const std::vector<std::string>& parameters, User* user)
{
if (parameters.size() > 0)
{
/* Remote MAP, the server is within the 1st parameter */
TreeServer* s = Utils->FindServerMask(parameters[0]);
bool ret = false;
if (!s)
{
user->WriteNumeric(ERR_NOSUCHSERVER, "%s %s :No such server", user->nick.c_str(), parameters[0].c_str());
ret = true;
}
else if (s && s != Utils->TreeRoot)
{
std::deque<std::string> params;
params.push_back(parameters[0]);
params[0] = s->GetName();
Utils->DoOneToOne(user->uuid, "MAP", params, s->GetName());
ret = true;
}
// Don't return if s == Utils->TreeRoot (us)
if (ret)
return 1;
}
// This array represents a virtual screen which we will
// "scratch" draw to, as the console device of an irc
// client does not provide for a proper terminal.
float totusers = 0;
float totservers = 0;
static char matrix[250][250];
for (unsigned int t = 0; t < 250; t++)
{
matrix[t][0] = '\0';
}
line = 0;
// The only recursive bit is called here.
ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
// Process each line one by one. The algorithm has a limit of
// 250 servers (which is far more than a spanning tree should have
// anyway, so we're ok). This limit can be raised simply by making
// the character matrix deeper, 250 rows taking 100k of memory.
for (int l = 1; l < line; l++)
{
// scan across the line looking for the start of the
// servername (the recursive part of the algorithm has placed
// the servers at indented positions depending on what they
// are related to)
int first_nonspace = 0;
while (matrix[l][first_nonspace] == ' ')
{
first_nonspace++;
}
first_nonspace--;
// Draw the `- (corner) section: this may be overwritten by
// another L shape passing along the same vertical pane, becoming
// a |- (branch) section instead.
matrix[l][first_nonspace] = '-';
matrix[l][first_nonspace-1] = '`';
int l2 = l - 1;
// Draw upwards until we hit the parent server, causing possibly
// other corners (`-) to become branches (|-)
while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
{
matrix[l2][first_nonspace-1] = '|';
l2--;
}
}
float avg_users = totusers / totservers;
// dump the whole lot to the user.
if (IS_LOCAL(user))
{
ServerInstance->Logs->Log("map",DEBUG,"local");
for (int t = 0; t < line; t++)
{
user->WriteNumeric(RPL_MAP, "%s :%s",user->nick.c_str(),&matrix[t][0]);
}
user->WriteNumeric(RPL_MAPUSERS, "%s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick.c_str(),totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
user->WriteNumeric(RPL_ENDMAP, "%s :End of /MAP",user->nick.c_str());
}
else
{
ServerInstance->Logs->Log("map", DEBUG, "remote dump lines=%d", line);
// XXX: annoying that we have to use hardcoded numerics here..
for (int t = 0; t < line; t++)
{
ServerInstance->PI->PushToClient(user, std::string("::") + ServerInstance->Config->ServerName + " 006 " + user->nick + " :" + &matrix[t][0]);
}
ServerInstance->PI->PushToClient(user, std::string("::") + ServerInstance->Config->ServerName + " 270 " + user->nick + " :" + ConvToStr(totservers) + " server"+(totservers > 1 ? "s" : "") + " and " + ConvToStr(totusers) + " user"+(totusers > 1 ? "s" : "") + ", average " + ConvToStr(avg_users) + " users per server");
ServerInstance->PI->PushToClient(user, std::string("::") + ServerInstance->Config->ServerName + " 007 " + user->nick + " :End of /MAP");
}
return 1;
}
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