From ae7b06ff8ad775a945bd677effd72b7fafa13d8d Mon Sep 17 00:00:00 2001
From: Ben Longbons <b.r.longbons@gmail.com>
Date: Thu, 17 Apr 2014 16:10:11 -0700
Subject: Die sensibly, take 1

---
 src/mmo/socket.cpp | 34 ++++++++++++++++++++--------------
 src/mmo/socket.hpp | 10 +++++++++-
 2 files changed, 29 insertions(+), 15 deletions(-)

(limited to 'src/mmo')

diff --git a/src/mmo/socket.cpp b/src/mmo/socket.cpp
index 48cd149..322a1f4 100644
--- a/src/mmo/socket.cpp
+++ b/src/mmo/socket.cpp
@@ -104,17 +104,20 @@ void null_parse(Session *s);
 /// Default parser for new connections
 static
 void (*default_func_parse)(Session *) = null_parse;
+static
+void (*default_delete)(Session *) = nullptr;
 
-void set_defaultparse(void (*defaultparse)(Session *))
+void set_defaultparse(void (*defaultparse)(Session *), void (*on_delete)(Session *))
 {
     default_func_parse = defaultparse;
+    default_delete = on_delete;
 }
 
 /// Read from socket to the queue
 static
 void recv_to_fifo(Session *s)
 {
-    if (s->eof)
+    if (s->private_is_eof())
         return;
 
     ssize_t len = s->fd.read(&s->rdata[s->rdata_size],
@@ -127,14 +130,14 @@ void recv_to_fifo(Session *s)
     }
     else
     {
-        s->eof = 1;
+        s->set_eof();
     }
 }
 
 static
 void send_from_fifo(Session *s)
 {
-    if (s->eof)
+    if (s->private_is_eof())
         return;
 
     ssize_t len = s->fd.write(&s->wdata[0], s->wdata_size);
@@ -151,7 +154,7 @@ void send_from_fifo(Session *s)
     }
     else
     {
-        s->eof = 1;
+        s->set_eof();
     }
 }
 
@@ -222,6 +225,7 @@ void connect_client(Session *ls)
     s->func_recv = recv_to_fifo;
     s->func_send = send_from_fifo;
     s->func_parse = default_func_parse;
+    s->func_delete = default_delete;
     s->client_ip = IP4Address(client_address.sin_addr);
     s->created = TimeT::now();
     s->connected = 0;
@@ -340,6 +344,7 @@ Session *make_connection(IP4Address ip, uint16_t port)
     s->func_recv = recv_to_fifo;
     s->func_send = send_from_fifo;
     s->func_parse = default_func_parse;
+    s->func_delete = default_delete;
     s->created = TimeT::now();
     s->connected = 1;
 
@@ -359,6 +364,8 @@ void delete_session(Session *s)
         fd_max--;
     readfds.clr(fd);
     {
+        s->func_delete(s);
+
         s->rdata.delete_();
         s->wdata.delete_();
         s->session_data.reset();
@@ -461,23 +468,22 @@ void do_parsepacket(void)
             && static_cast<time_t>(TimeT::now()) - static_cast<time_t>(s->created) > CONNECT_TIMEOUT)
         {
             PRINTF("Session #%d timed out\n", s);
-            s->eof = 1;
+            s->set_eof();
         }
-        if (!s->rdata_size && !s->eof)
-            continue;
-        if (s->func_parse)
+        if (s->rdata_size && !s->private_is_eof() && s->func_parse)
         {
             s->func_parse(s);
             /// some func_parse may call delete_session
+            // (that's kind of evil)
             s = get_session(i);
-            if (s && s->eof)
-            {
-                delete_session(s);
-                s = nullptr;
-            }
             if (!s)
                 continue;
         }
+        if (s->private_is_eof())
+        {
+            delete_session(s);
+            continue;
+        }
         /// Reclaim buffer space for what was read
         RFIFOFLUSH(s);
     }
diff --git a/src/mmo/socket.hpp b/src/mmo/socket.hpp
index 256c08b..53e0dfd 100644
--- a/src/mmo/socket.hpp
+++ b/src/mmo/socket.hpp
@@ -59,8 +59,14 @@ struct Session
     TimeT created;
     bool connected;
 
+private:
     /// Flag needed since structure must be freed in a server-dependent manner
     bool eof;
+public:
+    void set_eof() { eof = true; }
+    // not everything is a member yet ...
+    bool private_is_eof() { return eof; }
+
     /// Currently used by clif_setwaitclose
     Timer timed_close;
 
@@ -87,6 +93,8 @@ struct Session
     /// is a player or a server/ladmin
     /// Can be set explicitly or via set_defaultparse
     void (*func_parse)(Session *);
+    /// Cleanup function since we're not fully RAII yet
+    void (*func_delete)(Session *);
     /// Server-specific data type
     std::unique_ptr<SessionData, SessionDeleter> session_data;
 
@@ -141,7 +149,7 @@ void do_parsepacket(void);
 /// Change the default parser for newly connected clients
 // typically called once per server, but individual clients may identify
 // themselves as servers
-void set_defaultparse(void(*defaultparse)(Session *));
+void set_defaultparse(void(*defaultparse)(Session *), void(*defaultdelete)(Session *));
 
 template<class T>
 uint8_t *pod_addressof_m(T& structure)
-- 
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