Fixes #3993

code/modules/clothing/clothing.dm

@@ -194,7 +194,7 @@ BLIND     // can't see anything
 	name = "Space helmet"
 	icon_state = "space"
 	desc = "A special helmet designed for work in a hazardous, low-pressure environment."
-	flags = FPRINT | TABLEPASS | HEADCOVERSEYES | BLOCKHAIR | HEADCOVERSMOUTH | STOPSPRESSUREDMAGE
+	flags = FPRINT | TABLEPASS | HEADCOVERSEYES | BLOCKHAIR | HEADCOVERSMOUTH | STOPSPRESSUREDMAGE | THICKMATERIAL
 	item_state = "space"
 	permeability_coefficient = 0.01
 	armor = list(melee = 0, bullet = 0, laser = 0,energy = 0, bomb = 0, bio = 100, rad = 50)
@@ -212,7 +212,7 @@ BLIND     // can't see anything
 	w_class = 4//bulky item
 	gas_transfer_coefficient = 0.01
 	permeability_coefficient = 0.02
-	flags = FPRINT | TABLEPASS | STOPSPRESSUREDMAGE
+	flags = FPRINT | TABLEPASS | STOPSPRESSUREDMAGE | THICKMATERIAL
 	body_parts_covered = UPPER_TORSO|LOWER_TORSO|LEGS|FEET|ARMS|HANDS
 	allowed = list(/obj/item/device/flashlight,/obj/item/weapon/tank/emergency_oxygen)
 	slowdown = 3

code/modules/clothing/head/helmet.dm

@@ -2,7 +2,7 @@
 	name = "helmet"
 	desc = "Standard Security gear. Protects the head from impacts."
 	icon_state = "helmet"
-	flags = FPRINT | TABLEPASS | HEADCOVERSEYES
+	flags = FPRINT | TABLEPASS | HEADCOVERSEYES | THICKMATERIAL
 	item_state = "helmet"
 	armor = list(melee = 50, bullet = 15, laser = 50,energy = 10, bomb = 25, bio = 0, rad = 0)
 	flags_inv = HIDEEARS|HIDEEYES

code/modules/clothing/suits/armor.dm

@@ -2,7 +2,7 @@
 /obj/item/clothing/suit/armor
 	allowed = list(/obj/item/weapon/gun/energy,/obj/item/weapon/reagent_containers/spray/pepper,/obj/item/weapon/gun/projectile,/obj/item/ammo_magazine,/obj/item/ammo_casing,/obj/item/weapon/melee/baton,/obj/item/weapon/handcuffs)
 	body_parts_covered = UPPER_TORSO|LOWER_TORSO
-	flags = FPRINT | TABLEPASS
+	flags = FPRINT | TABLEPASS | THICKMATERIAL
 
 	cold_protection = UPPER_TORSO|LOWER_TORSO
 	min_cold_protection_temperature = ARMOR_MIN_COLD_PROTECTION_TEMPERATURE

code/modules/mob/living/carbon/human/human.dm

@@ -1291,3 +1291,22 @@
 		W.update_icon()
 		W.message = message
 		W.add_fingerprint(src)
+
+/mob/living/carbon/human/can_inject(var/mob/user, var/error_msg, var/target_zone)
+	. = 1
+
+	if(!user)
+		target_zone = pick("chest","chest","chest","left leg","right leg","left arm", "right arm", "head")
+	else if(!target_zone)
+		target_zone = user.zone_sel.selecting
+
+	switch(target_zone)
+		if("head")
+			if(head && head.flags & THICKMATERIAL)
+				. = 0
+		else
+			if(wear_suit && wear_suit.flags & THICKMATERIAL)
+				. = 0
+	if(!. && error_msg && user)
+ 		// Might need re-wording.
+		user << "<span class='alert'>There is no exposed flesh or thin material [target_zone == "head" ? "on their head" : "on their body"] to inject into.</span>"

code/modules/mob/living/carbon/human/human_defense.dm

@@ -52,7 +52,7 @@ emp_act
 				return -1 // complete projectile permutation
 
 	if(check_shields(P.damage, "the [P.name]"))
-		P.on_hit(src, 2)
+		P.on_hit(src, 2, def_zone)
 		return 2
 
 //BEGIN BOOK'S TASER NERF.

code/modules/mob/living/living.dm

@@ -211,6 +211,9 @@
 		O.emp_act(severity)
 	..()
 
+/mob/living/proc/can_inject()
+	return 1
+
 /mob/living/proc/get_organ_target()
 	var/mob/shooter = src
 	var/t = shooter:zone_sel.selecting

code/modules/mob/living/living_defense.dm

@@ -58,7 +58,7 @@
 		return 2
 	if(!P.nodamage)
 		apply_damage((P.damage/(absorb+1)), P.damage_type, def_zone, absorb, 0, P)
-	P.on_hit(src, absorb)
+	P.on_hit(src, absorb, def_zone)
 	return absorb
 
 /mob/living/hitby(atom/movable/AM as mob|obj,var/speed = 5)//Standardization and logging -Sieve

code/modules/mob/living/silicon/silicon.dm

@@ -201,3 +201,9 @@
 	dat += "<br>"
 	src << browse(dat, "window=airoster")
 	onclose(src, "airoster")
+
+//can't inject synths
+/mob/living/silicon/can_inject(var/mob/user, var/error_msg)
+	if(error_msg)
+		user << "<span class='alert'>The armoured plating is too tough.</span>"
+	return 0

code/modules/paperwork/pen.dm

@@ -90,12 +90,17 @@
 	origin_tech = "materials=2;syndicate=5"
 
 
-/obj/item/weapon/pen/paralysis/attack(mob/M as mob, mob/user as mob)
+/obj/item/weapon/pen/paralysis/attack(mob/living/M as mob, mob/user as mob)
+
 	if(!(istype(M,/mob)))
 		return
+
 	..()
-	if(reagents.total_volume)
-		if(M.reagents) reagents.trans_to(M, 50)
+
+
+	if(M.can_inject(user,1))
+		if(reagents.total_volume)
+			if(M.reagents) reagents.trans_to(M, 50)
 	return
 
 

code/modules/reagents/reagent_containers/borghydro.dm

@@ -62,14 +62,15 @@
 	var/datum/reagents/R = reagent_list[reagent_list.len]
 	R.add_reagent(reagent, 30)
 
-/obj/item/weapon/reagent_containers/borghypo/attack(mob/M as mob, mob/user as mob)
+/obj/item/weapon/reagent_containers/borghypo/attack(mob/living/M as mob, mob/user as mob)
 	var/datum/reagents/R = reagent_list[mode]
 	if(!R.total_volume)
 		user << "\red The injector is empty."
 		return
-	if (!( istype(M, /mob) ))
+	if (!(istype(M)))
 		return
-	if (R.total_volume)
+
+	if (R.total_volume && M.can_inject(user,1))
 		user << "\blue You inject [M] with the injector."
 		M << "\red You feel a tiny prick!"
 

code/modules/reagents/reagent_containers/syringes.dm

@@ -140,11 +140,23 @@
 					return
 
 				if(ismob(target) && target != user)
+
 					var/time = 30 //Injecting through a hardsuit takes longer due to needing to find a port.
+
 					if(istype(target,/mob/living/carbon/human))
+
 						var/mob/living/carbon/human/H = target
-						if(H.wear_suit && istype(H.wear_suit,/obj/item/clothing/suit/space))
-							time = 60
+						if(H.wear_suit)
+							if(istype(H.wear_suit,/obj/item/clothing/suit/space))
+								time = 60
+							else if(!H.can_inject(user, 1))
+								return
+
+					else if(isliving(target))
+
+						var/mob/living/M = target
+						if(!M.can_inject(user, 1))
+							return
 
 					for(var/mob/O in viewers(world.view, user))
 						if(time == 30)

code/modules/reagents/syringe_gun.dm

@@ -93,10 +93,18 @@
 						M.attack_log += "\[[time_stamp()]\] <b>UNKNOWN SUBJECT (No longer exists)</b> shot <b>[M]/[M.ckey]</b> with a <b>syringegun</b> ([R])"
 						msg_admin_attack("UNKNOWN shot [M] ([M.ckey]) with a <b>syringegun</b> ([R]) (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[user.x];Y=[user.y];Z=[user.z]'>JMP</a>)")
 
-					if(D.reagents)
-						D.reagents.trans_to(M, 15)
+					var/mob/living/T
+					if(istype(M,/mob/living))
+						T = M
+
 					M.visible_message("<span class='danger'>[M] is hit by the syringe!</span>")
 
+					if(T && istype(T) && T.can_inject())
+						if(D.reagents)
+							D.reagents.trans_to(M, 15)
+					else
+						M.visible_message("<span class='danger'>The syringe bounces off [M]!</span>")
+
 					del(D)
 					break
 			if(D)