From d730fff10b64381cb6676b13c7b8ace459b2184d Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Thu, 21 Jul 2016 21:52:09 +0300
Subject: Add fail move response packet.

---
 src/emap/clif.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 src/emap/clif.h |  3 ++-
 src/emap/init.c |  1 +
 src/emap/send.c | 11 ++++++++
 src/emap/send.h |  3 +++
 5 files changed, 97 insertions(+), 2 deletions(-)

diff --git a/src/emap/clif.c b/src/emap/clif.c
index 2faf394..d211a83 100644
--- a/src/emap/clif.c
+++ b/src/emap/clif.c
@@ -14,7 +14,6 @@
 #include "common/socket.h"
 #include "common/strlib.h"
 #include "common/cbasetypes.h"
-//#include "common/utils.h"
 #include "common/random.h"
 #include "common/timer.h"
 #include "map/guild.h"
@@ -39,6 +38,39 @@
 
 extern bool isInit;
 
+static inline void RBUFPOS(const uint8 *p,
+                           unsigned short pos,
+                           short *x,
+                           short *y,
+                           unsigned char *dir)
+{
+    p += pos;
+
+    if (x)
+    {
+        x[0] = ((p[0] & 0xff) << 2) | (p[1] >> 6);
+    }
+
+    if (y)
+    {
+        y[0] = ((p[1] & 0x3f) << 4) | (p[2] >> 4);
+    }
+
+    if (dir)
+    {
+        dir[0] = (p[2] & 0x0f);
+    }
+}
+
+static inline void RFIFOPOS(int fd,
+                            unsigned short pos,
+                            short *x,
+                            short *y,
+                            unsigned char *dir)
+{
+    RBUFPOS(RFIFOP(fd,pos), 0, x, y, dir);
+}
+
 void eclif_quest_send_list_pre(TBL_PC **sdPtr)
 {
     TBL_PC *sd = *sdPtr;
@@ -1651,3 +1683,50 @@ void eclif_skillinfo_pre(struct map_session_data **sdPtr,
         WFIFOB(fd, 20) = 0;
     WFIFOSET(fd, sz);
 }
+
+void eclif_parse_WalkToXY(int fd,
+                          struct map_session_data *sd)
+{
+    short x, y;
+
+    if (pc_isdead(sd))
+    {
+        clif->clearunit_area(&sd->bl, CLR_DEAD);
+        return;
+    }
+
+    if (sd->sc.opt1 && (sd->sc.opt1 == OPT1_STONEWAIT || sd->sc.opt1 == OPT1_BURNING))
+        ; //You CAN walk on this OPT1 value.
+    /*else if( sd->progressbar.npc_id )
+        clif->progressbar_abort(sd);*/
+    else if (pc_cant_act(sd))
+        return;
+
+    if(sd->sc.data[SC_RUN] || sd->sc.data[SC_WUGDASH])
+        return;
+
+    pc->delinvincibletimer(sd);
+
+    RFIFOPOS(fd, 2, &x, &y, NULL);
+
+    //Set last idle time... [Skotlex]
+    pc->update_idle_time(sd, BCIDLE_WALK);
+
+    if (sd->ud.state.change_walk_target == 0)
+    {
+        if (unit->walktoxy(&sd->bl, x, y, 4) &&
+            sd->ud.state.change_walk_target == 1)
+        {
+            struct SessionExt *data = session_get_bysd(sd);
+            if (!data)
+                return;
+            if (data->clientVersion < 18)
+                return;
+            send_walk_fail(sd->fd, x, y);
+        }
+    }
+    else
+    {
+        unit->walktoxy(&sd->bl, x, y, 4);
+    }
+}
diff --git a/src/emap/clif.h b/src/emap/clif.h
index 9605e7c..5786e52 100644
--- a/src/emap/clif.h
+++ b/src/emap/clif.h
@@ -99,5 +99,6 @@ void eclif_addskill_pre(struct map_session_data **sdPtr,
 void eclif_skillinfo_pre(struct map_session_data **sdPtr,
                          int *skill_idPtr,
                          int *infPtr);
-
+void eclif_parse_WalkToXY(int fd,
+                          struct map_session_data *sd) __attribute__((nonnull (2)));
 #endif  // EVOL_MAP_CLIF
diff --git a/src/emap/init.c b/src/emap/init.c
index 9a1234b..4ac951d 100644
--- a/src/emap/init.c
+++ b/src/emap/init.c
@@ -312,6 +312,7 @@ HPExport void plugin_init (void)
     skill->castend_pos2_unknown = eskill_castend_pos2_unknown;
     skill->validate_additional_fields = eskill_validate_additional_fields;
     clif->useskill = eclif_useskill;
+    clif->pWalkToXY = eclif_parse_WalkToXY;
 
     langScriptId = script->add_str("Lang");
     mountScriptId = script->add_str("mount");
diff --git a/src/emap/send.c b/src/emap/send.c
index 36e05e9..2d22363 100644
--- a/src/emap/send.c
+++ b/src/emap/send.c
@@ -12,6 +12,7 @@
 #include "common/mmo.h"
 #include "common/socket.h"
 #include "common/strlib.h"
+#include "common/timer.h"
 #include "map/clif.h"
 #include "map/mob.h"
 #include "map/npc.h"
@@ -482,3 +483,13 @@ void send_pc_killed(int fd, struct block_list* bl)
         WFIFOL(fd, 2) = 0;
     WFIFOSET(fd, 6);
 }
+
+void send_walk_fail(int fd, int x, int y)
+{
+    WFIFOHEAD(fd, 10);
+    WFIFOW(fd,0) = 0xb21;
+    WFIFOL(fd, 2) = (unsigned int)timer->gettick();
+    WFIFOW(fd, 6) = x;
+    WFIFOW(fd, 8) = y;
+    WFIFOSET(fd, 10);
+}
diff --git a/src/emap/send.h b/src/emap/send.h
index 8ebb7d1..d2d6397 100644
--- a/src/emap/send.h
+++ b/src/emap/send.h
@@ -50,5 +50,8 @@ void send_pc_skin(int fd,
                   const char *const skin);
 void send_pc_killed(int fd,
                     struct block_list* bl);
+void send_walk_fail(int fd,
+                    int x,
+                    int y);
 
 #endif  // EVOL_MAP_SEND
-- 
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