From 834b4148b396a82962106db1c6c3c9d0c8636a99 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sun, 17 Jul 2016 20:45:00 +0300
Subject: Add support for new casting packet 0xb1e.

In this packet added calculated skill range.
---
 src/emap/clif.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/emap/clif.h |  8 ++++++
 src/emap/init.c |  1 +
 3 files changed, 92 insertions(+)

diff --git a/src/emap/clif.c b/src/emap/clif.c
index 87a2adc..50ca4d9 100644
--- a/src/emap/clif.c
+++ b/src/emap/clif.c
@@ -594,6 +594,29 @@ int eclif_send_actual_pre(int *fd,
                 return 0;
             }
         }
+        if (packet == 0xb1e)
+        {
+            struct SessionExt *data = session_get(*fd);
+            if (!data)
+                return 0;
+            if (data->clientVersion < 18)
+            {   // not sending new packets to old clients
+//                ShowWarning("skip packet %d\n", packet);
+                hookStop();
+                return 0;
+            }
+        }
+        if (packet == 0x7fb)
+        {
+            struct SessionExt *data = session_get(*fd);
+            if (!data)
+                return 0;
+            if (data->clientVersion >= 18)
+            {   // not sending old packets to new clients
+                hookStop();
+                return 0;
+            }
+        }
     }
     return 0;
 }
@@ -1399,3 +1422,63 @@ void eclif_addcards2_post(unsigned short *cards, struct item *item)
         cards[3] = item->card[3];
     }
 }
+
+void eclif_useskill(struct block_list* bl,
+                    int src_id,
+                    int dst_id,
+                    int dst_x,
+                    int dst_y,
+                    uint16 skill_id,
+                    uint16 skill_lv,
+                    int casttime)
+{
+    const int cmd = 0x7fb;
+    unsigned char buf[50];
+    int property = skill->get_ele(skill_id, skill_lv);
+
+    // for client < 18
+    WBUFW(buf, 0) = cmd;
+    WBUFL(buf, 2) = src_id;
+    WBUFL(buf, 6) = dst_id;
+    WBUFW(buf, 10) = dst_x;
+    WBUFW(buf, 12) = dst_y;
+    WBUFW(buf, 14) = skill_id;
+    WBUFL(buf, 16) = property < 0 ? 0 : property; //Avoid sending negatives as element [Skotlex]
+    WBUFL(buf, 20) = casttime;
+    WBUFB(buf, 24) = 0;  // isDisposable
+
+    if (clif->isdisguised(bl))
+    {
+        clif->send(buf, 25, bl, AREA_WOS);
+        WBUFL(buf, 2) = -src_id;
+        clif->send(buf, 25, bl, SELF);
+    }
+    else
+    {
+        clif->send(buf, 25, bl, AREA);
+    }
+
+    // for client >= 18
+    const int len = 30;
+    WBUFW(buf, 0) = 0xb1e;
+    WBUFW(buf, 2) = len;
+    WBUFL(buf, 4) = src_id;
+    WBUFL(buf, 8) = dst_id;
+    WBUFW(buf, 12) = dst_x;
+    WBUFW(buf, 14) = dst_y;
+    WBUFW(buf, 16) = skill_id;
+    WBUFL(buf, 18) = property < 0 ? 0 : property; //Avoid sending negatives as element [Skotlex]
+    WBUFL(buf, 22) = casttime;
+    WBUFL(buf, 26) = skill->get_range2(bl, skill_id, skill_lv);
+
+    if (clif->isdisguised(bl))
+    {
+        clif->send(buf, len, bl, AREA_WOS);
+        WBUFL(buf, 2) = -src_id;
+        clif->send(buf, len, bl, SELF);
+    }
+    else
+    {
+        clif->send(buf, len, bl, AREA);
+    }
+}
diff --git a/src/emap/clif.h b/src/emap/clif.h
index 046394f..9d4b774 100644
--- a/src/emap/clif.h
+++ b/src/emap/clif.h
@@ -85,5 +85,13 @@ void eclif_addcards_post(unsigned char *buf,
                          struct item *item);
 void eclif_addcards2_post(unsigned short *cards,
                           struct item *item);
+void eclif_useskill(struct block_list* bl,
+                    int src_id,
+                    int dst_id,
+                    int dst_x,
+                    int dst_y,
+                    uint16 skill_id,
+                    uint16 skill_lv,
+                    int casttime);
 
 #endif  // EVOL_MAP_CLIF
diff --git a/src/emap/init.c b/src/emap/init.c
index a8a8ecd..3c57019 100644
--- a/src/emap/init.c
+++ b/src/emap/init.c
@@ -308,6 +308,7 @@ HPExport void plugin_init (void)
     skill->get_requirement_unknown = eskill_get_requirement_unknown;
     skill->castend_pos2_unknown = eskill_castend_pos2_unknown;
     skill->validate_additional_fields = eskill_validate_additional_fields;
+    clif->useskill = eclif_useskill;
 
     langScriptId = script->add_str("Lang");
     mountScriptId = script->add_str("mount");
-- 
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