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-rw-r--r--src/modules/m_spanningtree/override_map.cpp162
1 files changed, 162 insertions, 0 deletions
diff --git a/src/modules/m_spanningtree/override_map.cpp b/src/modules/m_spanningtree/override_map.cpp
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+++ b/src/modules/m_spanningtree/override_map.cpp
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+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * InspIRCd: (C) 2002-2007 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 "commands/cmd_whois.h"
+#include "commands/cmd_stats.h"
+#include "socket.h"
+#include "wildcard.h"
+#include "xline.h"
+#include "transport.h"
+
+#include "m_spanningtree/timesynctimer.h"
+#include "m_spanningtree/resolvers.h"
+#include "m_spanningtree/main.h"
+#include "m_spanningtree/utils.h"
+#include "m_spanningtree/treeserver.h"
+#include "m_spanningtree/link.h"
+#include "m_spanningtree/treesocket.h"
+#include "m_spanningtree/rconnect.h"
+#include "m_spanningtree/rsquit.h"
+
+/* $ModDep: m_spanningtree/timesynctimer.h m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_spanningtree/rconnect.h m_spanningtree/rsquit.h */
+
+const std::string ModuleSpanningTree::MapOperInfo(TreeServer* Current)
+{
+ time_t secs_up = ServerInstance->Time() - Current->age;
+ return (" [Up: " + TimeToStr(secs_up) + " Lag: "+ConvToStr(Current->rtt)+"ms]");
+}
+
+// WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
+void ModuleSpanningTree::ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][128], float &totusers, float &totservers)
+{
+ if (line < 128)
+ {
+ 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[40];
+ memset(spacer,' ',40);
+ if ((40 - Current->GetName().length() - depth) > 1) {
+ spacer[40 - Current->GetName().length() - depth] = '\0';
+ }
+ else
+ {
+ spacer[5] = '\0';
+ }
+ float percent;
+ char text[128];
+ /* Neat and tidy default values, as we're dealing with a matrix not a simple string */
+ memset(text, 0, 128);
+
+ if (ServerInstance->clientlist->size() == 0) {
+ // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
+ percent = 0;
+ }
+ else
+ {
+ percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist->size()) * 100;
+ }
+ const std::string operdata = IS_OPER(user) ? MapOperInfo(Current) : "";
+ snprintf(text, 126, "%s %s%5d [%5.2f%%]%s", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent, operdata.c_str());
+ totusers += Current->GetUserCount();
+ totservers++;
+ strlcpy(&matrix[line][depth],text,126);
+ 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 (*user->oper)
+ {
+ ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
+ }
+ }
+ else
+ {
+ ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? 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.
+void ModuleSpanningTree::HandleMap(const char** parameters, int pcnt, userrec* user)
+{
+ // 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;
+ char matrix[128][128];
+ for (unsigned int t = 0; t < 128; 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
+ // 128 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, 128 rows taking 10k 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--;
+ }
+ }
+ // dump the whole lot to the user. This is the easy bit, honest.
+ for (int t = 0; t < line; t++)
+ {
+ user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
+ }
+ float avg_users = totusers / totservers;
+ user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
+ user->WriteServ("007 %s :End of /MAP",user->nick);
+ return;
+}
+