From bb42916dda07ba08b2cf3cba590fa0f74ec27333 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Sun, 11 Jul 2010 18:24:22 +0800
Subject: [PATCH] Skeleton server code (compiles, just doesn't do anything)
---
server/src/Makefile | 20 ++++++++++++
server/src/cokebank.c | 40 ++++++++++++++++++++++++
server/src/common.h | 58 ++++++++++++++++++++++++++++++++++
server/src/dispense.c | 46 +++++++++++++++++++++++++++
server/src/itemdb.c | 19 ++++++++++++
server/src/logging.c | 19 ++++++++++++
server/src/main.c | 30 ++++++++++++++++++
server/src/server.c | 72 +++++++++++++++++++++++++++++++++++++++++++
8 files changed, 304 insertions(+)
create mode 100644 server/src/Makefile
create mode 100644 server/src/cokebank.c
create mode 100644 server/src/common.h
create mode 100644 server/src/dispense.c
create mode 100644 server/src/itemdb.c
create mode 100644 server/src/logging.c
create mode 100644 server/src/main.c
create mode 100644 server/src/server.c
diff --git a/server/src/Makefile b/server/src/Makefile
new file mode 100644
index 0000000..9df8c06
--- /dev/null
+++ b/server/src/Makefile
@@ -0,0 +1,20 @@
+# OpenDispense 2
+#
+
+OBJ := main.o logging.o dispense.o cokebank.o itemdb.o
+BIN := ../dispsrv
+
+LINKFLAGS :=
+CPPFLAGS :=
+CFLAGS := -Wall
+
+.PHONY: all clean
+
+all: $(BIN)
+
+clean:
+ $(RM) $(BIN) $(OBJ)
+
+$(BIN): $(OBJ)
+ $(CC) -o $(BIN) $(LINKFLAGS) $(OBJ)
+
diff --git a/server/src/cokebank.c b/server/src/cokebank.c
new file mode 100644
index 0000000..cb29eaf
--- /dev/null
+++ b/server/src/cokebank.c
@@ -0,0 +1,40 @@
+/*
+ * OpenDispense 2
+ * UCC (University [of WA] Computer Club) Electronic Accounting System
+ *
+ * cokebank.c - Coke-Bank management
+ *
+ * This file is licenced under the 3-clause BSD Licence. See the file COPYING
+ * for full details.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include "common.h"
+
+// === CODE ===
+int AlterBalance(int User, int Delta)
+{
+ return 0;
+}
+
+/**
+ * \brief Get the balance of the passed user
+ */
+int GetBalance(int User)
+{
+ return 0;
+}
+
+/**
+ * \brief Return the name the passed user
+ */
+char *GetUserName(int User)
+{
+ return NULL;
+}
+
+int GetUserID(const char *Username)
+{
+ return 0;
+}
+
diff --git a/server/src/common.h b/server/src/common.h
new file mode 100644
index 0000000..3e47fb7
--- /dev/null
+++ b/server/src/common.h
@@ -0,0 +1,58 @@
+/*
+ * OpenDispense2
+ *
+ * This code is published under the terms of the Acess licence.
+ * See the file COPYING for details.
+ *
+ * common.h - Core Header
+ */
+#ifndef _COMMON_H_
+#define _COMMON_H_
+
+// === CONSTANTS ===
+#define DEFAULT_CONFIG_FILE "/etc/opendispense/main.cfg"
+
+// === STRUCTURES ===
+typedef struct sItem tItem;
+struct sItem
+{
+ char *Name; //!< Display Name
+ int Price; //!< Price
+
+ short Type; //!< References an action
+ short ID; //!< Item ID
+};
+
+typedef struct sUser tUser;
+struct sUser
+{
+ int ID; //!< User ID (LDAP ID)
+ int Balance; //!< Balance in cents
+ int Bytes; //!< Traffic Usage
+ char Name[]; //!< Username
+};
+
+typedef struct sHandler tHandler;
+struct sHandler
+{
+ char *Name;
+ int (*CanDispense)(int User, int ID);
+ int (*DoDispense)(int User, int ID);
+};
+
+// === GLOBALS ===
+extern tItem *gaItems;
+extern int giNumItems;
+extern tHandler *gaHandlers;
+
+// === FUNCTIONS ===
+// --- Logging ---
+extern void Log_Error(const char *Format, ...);
+extern void Log_Info(const char *Format, ...);
+
+// --- Cokebank Functions ---
+extern int AlterBalance(int User, int Ammount);
+extern int GetBalance(int User);
+extern char *GetUserName(int User);
+
+#endif
diff --git a/server/src/dispense.c b/server/src/dispense.c
new file mode 100644
index 0000000..ee07bb9
--- /dev/null
+++ b/server/src/dispense.c
@@ -0,0 +1,46 @@
+/**
+ */
+#include "common.h"
+#include <stdlib.h>
+
+// === CODE ===
+int DispenseItem(int User, int Item)
+{
+ int ret;
+ tItem *item;
+ tHandler *handler;
+ char *username;
+
+ if(Item < 0 || Item >= giNumItems)
+ return -1;
+
+ item = &gaItems[Item];
+ handler = &gaHandlers[ item->Type ];
+
+ username = GetUserName(User);
+
+ ret = handler->CanDispense( User, item->ID );
+ if(!ret) return ret;
+
+ ret = AlterBalance( User, -item->Price );
+ // What value should I use for this error?
+ // AlterBalance should return the final user balance
+ if(ret == 0) return 1;
+
+ ret = handler->DoDispense( User, item->ID );
+ if(ret) {
+ Log_Error("Dispense failed after deducting cost (%s dispensing %s - %ic)",
+ username, item->Name, item->Price);
+ AlterBalance( User, item->Price );
+ free( username );
+ return 1;
+ }
+
+ Log_Info("Dispensed %s (%i:%i) for %s [cost %i, balance %i cents]",
+ item->Name, item->Type, item->ID,
+ username, item->Price, GetBalance(User)
+ );
+
+ free( username );
+ return 0;
+}
diff --git a/server/src/itemdb.c b/server/src/itemdb.c
new file mode 100644
index 0000000..116b047
--- /dev/null
+++ b/server/src/itemdb.c
@@ -0,0 +1,19 @@
+/*
+ * OpenDispense 2
+ * UCC (University [of WA] Computer Club) Electronic Accounting System
+ *
+ * itemdb.c - Dispense Item Databse
+ *
+ * This file is licenced under the 3-clause BSD Licence. See the file COPYING
+ * for full details.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include "common.h"
+
+// === GLOBALS ===
+ int giNumItems = 0;
+tItem *gaItems = NULL;
+tHandler *gaHandlers = NULL;
+
+// === CODE ===
diff --git a/server/src/logging.c b/server/src/logging.c
new file mode 100644
index 0000000..51cc8d2
--- /dev/null
+++ b/server/src/logging.c
@@ -0,0 +1,19 @@
+/*
+ * OpenDispense2
+ *
+ * logging.c - Debug/Logging Routines
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include "common.h"
+
+// === CODE ==
+void Log_Error(const char *Format, ...)
+{
+
+}
+
+void Log_Info(const char *Format, ...)
+{
+}
+
diff --git a/server/src/main.c b/server/src/main.c
new file mode 100644
index 0000000..5b8e8b5
--- /dev/null
+++ b/server/src/main.c
@@ -0,0 +1,30 @@
+/*
+ * OpenDispense 2
+ * UCC (University [of WA] Computer Club) Electronic Accounting System
+ *
+ * main.c - Initialisation Code
+ *
+ * This file is licenced under the 3-clause BSD Licence. See the file
+ * COPYING for full details.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include "common.h"
+
+// === IMPORTS ===
+extern void Init_Cokebank(void);
+extern void Load_Itemlist(void);
+extern void Server_Start(void);
+
+// === CODE ===
+int main(int argc, char *argv[])
+{
+ Cokebank_Init();
+
+ Load_Itemlist();
+
+ Server_Start();
+
+ return 0;
+}
+
diff --git a/server/src/server.c b/server/src/server.c
new file mode 100644
index 0000000..6d1ed5d
--- /dev/null
+++ b/server/src/server.c
@@ -0,0 +1,72 @@
+/*
+ * OpenDispense 2
+ * UCC (University [of WA] Computer Club) Electronic Accounting System
+ *
+ * server.c - Client Server Code
+ *
+ * This file is licenced under the 3-clause BSD Licence. See the file
+ * COPYING for full details.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include "common.h"
+#include <sys/socket.h>
+
+#define MAX_CONNECTION_QUEUE 5
+#define INPUT_BUFFER_SIZE 100
+
+#define MSG_STR_TOO_LONG "499 Malformed Command String"
+
+// === GLOBALS ===
+ int giServer_Port = 1020;
+
+// === CODE ===
+void Server_Start(void)
+{
+ // Create Server
+}
+
+void Server_HandleClient(int Socket)
+{
+ char inbuf[INPUT_BUFFER_SIZE];
+ char *buf = inbuf;
+ int remspace = INPUT_BUFFER_SIZE-1;
+ int bytes = -1;
+
+ // Read from client
+ while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
+ {
+ char *eol, *start;
+ buf[bytes] = '\0'; // Allow us to use stdlib string functions on it
+
+ // Split by lines
+ start = inbuf;
+ while( (eol = strchr(start, '\n')) )
+ {
+ *eol = '\0';
+ Server_ParseClientCommand(Socket, start);
+ start = eol + 1;
+ }
+
+ // Check if there was an incomplete line
+ if( *start != '\0' ) {
+ int tailBytes = bytes - (start-buf);
+ // Roll back in buffer
+ memcpy(inbuf, start, tailBytes);
+ remspace -= tailBytes;
+ if(remspace == 0) {
+ send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG));
+ }
+ }
+ else {
+ buf = inbuf;
+ remspace = INPUT_BUFFER_SIZE - 1;
+ }
+ }
+
+ // Check for errors
+ if( bytes < 0 ) {
+ fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
+ return ;
+ }
+}
--
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