From 631b375f3dbb150c3f37430a0a45f237ffac8153 Mon Sep 17 00:00:00 2001
From: blaze <blaze@discord>
Date: Tue, 30 Jul 2024 22:49:02 -0700
Subject: [PATCH] socd detection

---
 .gitignore           |  3 +++
 include/progs.h      | 11 ++++++++
 src/client.c         | 61 ++++++++++++++++++++++++++++++++++++++++++++
 src/commands.c       | 32 +++++++++++++++++++++--
 src/stats.c          |  8 ++++++
 src/world.c          |  2 ++
 tools/vs/ktx.vcxproj | 34 ++++++++++++++++++------
 7 files changed, 141 insertions(+), 10 deletions(-)

--- include/progs.h.orig
+++ include/progs.h
@@ -944,6 +944,17 @@ typedef struct gedict_s
 	float fIllegalFPSWarnings;
 // ILLEGALFPS]
 
+// SOCD detectioin
+	float fStrafeChangeCount;
+	float fFramePerfectStrafeChangeCount;
+	int   socdDetected;
+	int   socdChecksCount;
+	float fLastSideMoveSpeed;
+	int   matchStrafeChangeCount;
+	int   matchPerfectStrafeCount;
+	int   nullStrafeCount;
+// SOCD
+
 	float shownick_time;					// used to force centerprint is off at desired time
 	clientType_t ct;						// client type for client edicts
 // { timing
--- src/client.c.orig
+++ src/client.c
@@ -1658,6 +1658,16 @@ void ClientConnect()
 		SendIntermissionToClient();
 	}
 
+// SOCD
+	self->socdChecksCount = 0;
+	self->socdDetected = 0;
+	self->fStrafeChangeCount = 0;
+	self->fFramePerfectStrafeChangeCount = 0;
+	self->fLastSideMoveSpeed = 0;
+	self->matchStrafeChangeCount = 0;
+	self->matchPerfectStrafeCount = 0;
+	self->nullStrafeCount = 0;
+
 // ILLEGALFPS[
 
 	// Zibbo's frametime checking code
@@ -3520,6 +3530,57 @@ void PlayerPreThink()
 	}
 #endif
 
+// SOCD detection
+	{
+		float fSideMoveSpeed = self->movement[1];
+
+		if ((fSideMoveSpeed != 0) && (fSideMoveSpeed != self->fLastSideMoveSpeed) && (self->nullStrafeCount < 3)) //strafechange
+		{
+			self->fStrafeChangeCount += 1;
+			if (match_in_progress)
+				self->matchStrafeChangeCount += 1;
+
+			if ((fSideMoveSpeed != 0) && (self->fLastSideMoveSpeed != 0))
+			{
+				self->fFramePerfectStrafeChangeCount += 1;
+				if (match_in_progress)
+					self->matchPerfectStrafeCount += 1;
+			}
+
+			self->nullStrafeCount = 0;
+		}
+		else
+		{
+			if (0 == fSideMoveSpeed)
+				self->nullStrafeCount += 1;
+			else
+				self->nullStrafeCount = 0;
+		}
+
+		self->fLastSideMoveSpeed = fSideMoveSpeed;
+
+		if (self->fStrafeChangeCount >= 16)
+		{
+			if (self->fFramePerfectStrafeChangeCount / self->fStrafeChangeCount >= 0.75)
+			{
+				int k_allow_socd_warning = cvar("k_allow_socd_warning");
+
+				self->socdDetected += 1;
+
+				if ((!match_in_progress) && (!self->isBot) && k_allow_socd_warning)
+				{
+					G_bprint(PRINT_HIGH,
+						"Warning! %s: SOCD movement assistance detected. Please disable iDrive or keyboard SOCD features.\n",
+						self->netname);
+				}
+			}
+
+			self->socdChecksCount += 1;
+			self->fStrafeChangeCount = 0;
+			self->fFramePerfectStrafeChangeCount = 0;
+		}
+	}
+
 // ILLEGALFPS[
 
 	self->fAverageFrameTime += g_globalvars.frametime;
--- src/commands.c.orig
+++ src/commands.c
@@ -8114,16 +8114,47 @@ void fcheck()
 
 	if (!is_real_adm(self))
 	{
-		if (strneq(arg_x, "f_version") && strneq(arg_x, "f_modified") && strneq(arg_x, "f_server"))
+		if (strneq(arg_x, "f_version") && strneq(arg_x, "f_modified") && strneq(arg_x, "f_server") && strneq(arg_x, "f_movement"))
 		{
 			G_sprint(self, 2, "You are not allowed to check \020%s\021\n"
-						"available checks are: f_version, f_modified and f_server\n",
+						"available checks are: f_version, f_modified, f_server and f_movement\n",
 						arg_x);
 
 			return;
 		}
 	}
 
+	if (streq(arg_x, "f_movement"))
+	{
+		G_bprint(2, "%s is checking \020%s\021\n", self->netname, arg_x);
+
+		for (i = 1; i <= MAX_CLIENTS; i++)
+		{
+			if (!strnull(g_edicts[i].netname))
+			{
+				if (g_edicts[i].socdDetected > 0)
+				{
+					G_bprint(2, "%s: SOCD movement assistance detected!\n", g_edicts[i].netname);
+				}
+				else
+				{
+					if (g_edicts[i].socdChecksCount >= 2)
+					{
+						G_bprint(2, "%s: no assistance detected.\n", g_edicts[i].netname);
+					}
+					else
+					{
+						G_bprint(2, "%s: not enough movement to run SOCD detection. Please move around a map.\n", g_edicts[i].netname);
+					}
+				}
+				G_bprint(2, "%s: %s:%d/%d %s:%d/%d\n", redtext("Movement"), redtext("Perfect strafes"),
+					g_edicts[i].matchPerfectStrafeCount, g_edicts[i].matchStrafeChangeCount,
+					redtext("SOCD detections"), g_edicts[i].socdDetected, g_edicts[i].socdChecksCount);
+			}
+		}
+		return;
+	}
+
 	for (i = 1; i <= MAX_CLIENTS; i++)
 	{
 		if (g_edicts[i].f_checkbuf)
--- src/stats.c.orig
+++ src/stats.c
@@ -763,6 +763,14 @@ void OnePlayerStats(gedict_t *p, int tp)
 					p->ps.vel_frames > 0 ? p->ps.velocity_sum / p->ps.vel_frames : 0.);
 	}
 
+	if (!p->isBot)
+	{
+		G_bprint(2, "%s: %s:%d/%d %s:%d/%d\n", redtext("Movement"), redtext("Perfect strafes"),
+			p->matchPerfectStrafeCount, p->matchStrafeChangeCount, redtext("SOCD detections"),
+			p->socdDetected, p->socdChecksCount);
+	}
+
+
 	// armors + megahealths
 	if (!lgc_enabled())
 	{
--- src/world.c.orig
+++ src/world.c
@@ -1000,6 +1000,8 @@ void FirstFrame()
 
 	RegisterCvar("k_teamoverlay"); // q3 like team overlay
 
+	RegisterCvar("k_allow_socd_warning"); // socd
+
 // { SP
 	RegisterCvarEx("k_monster_spawn_time", "20");
 // }