delete empty file net.h

.gitignore

@@ -0,0 +1,3 @@
+old/client.txt
+old/server.txt
+old/main

README.md

@@ -1,14 +1,7 @@
 # threaded network chat refactor
 
-https://www.youtube.com/watch?v=wecDU2t37gM
-
-<iframe width="560" height="315" src="https://www.youtube.com/embed/wecDU2t37gM?si=YH4pZrsXo-9n_ryh" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
-
-## What now?
-
-See TODO. From here we're going to push the code to the gitlab like we were told to after everyone
-is set up. Follow the coding style guidelines because otherwise everything will be extremely gross
-and inconsistent. If you set up your editor correctly, it will take care of most of that stuff.
+The code has been refactored and it compiles. Hopefully it won't explode, but that if it does, that just means we have
+actual meaningful work to do.
 
 ## TODO
 
@@ -23,7 +16,7 @@ and inconsistent. If you set up your editor correctly, it will take care of most
 ## Code
 
 Everything is in [src/](src).
-A mostly untouched copy of [Scott's original code](https://git.therats.win/scott/threaded_network_chat) is also in [old/](old).
+A mostly untouched copy of [scott's original code](https://git.therats.win/scott/threaded_network_chat) is also in [old/](old).
 A reformatted version of that code is also in [modified-example.cc](modified-example.cc) but it can be ignored.
 
 ## Build

STYLE.md

@@ -37,7 +37,7 @@ I recommend skimming over these for inspiration.
 	- return type goes on its own line,
 	- function name() is on a line below that, and
 	- open bracket `{` after that.
-  - no brackets on `for`, `if`, `while`, etc. statements that only contain one line 
+	- `for`, `if`, `while`, etc. statements that only contain one line 
 - Use `/* comments */` for permanent comments, `// comments` for temporary ones e.g. `TODO`'s or notices
 - **Try to make every line 100 characters wide or less.**
 - Start source files as `.cc` straight away, even if they're pure **C**.
@@ -60,7 +60,7 @@ The length of a function name, variable name, et cetera should be directly propo
 
 #### Don't
 
-- abbreviate global variables **EVER**,
+- abbreviate global variables,
 - mention the data type in a variable name,
 - use a full word where an abbreviation will do
   - (especially not in a variable that will die 5 lines later),
@@ -70,7 +70,7 @@ The length of a function name, variable name, et cetera should be directly propo
 #### Do
 
 - abbreviate extremely short-lived variables to one letter,
-  - e.g. `for (int index = 0; index < 10; i++)` -> `for (int i = 0; i < 10; i++)`
+  - e.g. `for (int index=0, index<10, i++)` -> `for (int i=0, i<10, i++)`
 - break any rule if following it ruins the readability
 
 ## Source File layout
@@ -120,3 +120,4 @@ div_numb(int n, int d)
 }
 ```
 
+

modified-example.cc

@@ -86,9 +86,8 @@ displayFile(string path, int startLineNum = 0, int numLines = 10)
 
 		// print each line directly to the screen
 		int num = 0;
-		while (getline(file, line) &&
-		       num <= numLines + startLineNum + 1) // while there is file content and the
-							   // line number isn't too high
+		while (getline(file, line) && num <= numLines + startLineNum + 1) // while there is file content and the
+										  // line number isn't too high
 		{
 			if (num >= startLineNum) {
 				move(lineNum, 0);
@@ -133,8 +132,7 @@ void *
 waitForClient(void *argss)
 {
 	waitClientArgs *args = static_cast<waitClientArgs *>(argss);
-	clientSocketDescriptor =
-	    accept(serverSocketDescriptor, (sockaddr *)&args->newSockAddr, &args->newSockAddrSize);
+	clientSocketDescriptor = accept(serverSocketDescriptor, (sockaddr *)&args->newSockAddr, &args->newSockAddrSize);
 	if (clientSocketDescriptor >= 0) {
 		writeToFile(logFileName, "client connected");
 		if (linesInFile(logFileName) > LOG_LENGTH)
@@ -186,8 +184,7 @@ setupServer(int port)
 		exit(0);
 	}
 	// bind the socket to its local address
-	int bindStatus =
-	    bind(serverSocketDescriptor, (struct sockaddr *)&servAddr, sizeof(servAddr));
+	int bindStatus = bind(serverSocketDescriptor, (struct sockaddr *)&servAddr, sizeof(servAddr));
 	if (bindStatus < 0) {
 		// keeps from bricking the terminal if this happens
 		endwin();
@@ -291,8 +288,7 @@ setupClient()
 	sendSockAddr.sin_port = htons(PORT_NUM);
 	clientSocketDescriptor = socket(AF_INET, SOCK_STREAM, 0);
 	// try to connect...
-	int status =
-	    connect(clientSocketDescriptor, (sockaddr *)&sendSockAddr, sizeof(sendSockAddr));
+	int status = connect(clientSocketDescriptor, (sockaddr *)&sendSockAddr, sizeof(sendSockAddr));
 	if (status < 0)
 		writeToFile(logFileName, "Error connecting to socket!");
 	writeToFile(logFileName, "Connected to the server!");

old/Makefile

@@ -0,0 +1,15 @@
+# Compiler and flags
+CXX = g++
+CXXFLAGS = -pthread -Wall -Wextra -O2 -std=c++17 -lcurses
+
+# Targets
+all: main
+
+# Client build
+main: main.cpp
+	$(CXX) $(CXXFLAGS) main.cpp -o main
+
+# Clean build artifacts
+clean:
+	rm -f main
+

old/README.md

@@ -0,0 +1,3 @@
+an attempt at a threaded ncurses network chat in c++
+
+the biggest bug right now is that if you start the server without having started it previously and there isn't a server.txt and client.txt from a previous session, it doesn't work at all. It will work when you try it a second time.

old/client.cpp

@@ -0,0 +1,86 @@
+/*this network test uses more complicated network functionality but doesnt use threads or ncurses. 
+that means you have to wait for the other end to send a message before getting to write a new message
+to run, do ./client.cpp 127.0.0.1 8080
+this one has args
+*/
+#include <iostream>
+#include <string>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/uio.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <fcntl.h>
+#include <fstream>
+using namespace std;
+//Client side
+int main(int argc, char *argv[])
+{
+    //we need 2 things: ip address and port number, in that order
+    if(argc != 3)
+    {
+        cerr << "Usage: ip_address port" << endl; exit(0); 
+    } //grab the IP address and port number 
+    char *serverIp = argv[1]; int port = atoi(argv[2]); 
+    //create a message buffer 
+    char msg[1500]; 
+    //setup a socket and connection tools 
+    struct hostent* host = gethostbyname(serverIp); 
+    sockaddr_in sendSockAddr;   
+    bzero((char*)&sendSockAddr, sizeof(sendSockAddr)); 
+    sendSockAddr.sin_family = AF_INET; 
+    sendSockAddr.sin_addr.s_addr = 
+        inet_addr(inet_ntoa(*(struct in_addr*)*host->h_addr_list));
+    sendSockAddr.sin_port = htons(port);
+    int clientSd = socket(AF_INET, SOCK_STREAM, 0);
+    //try to connect...
+    int status = connect(clientSd,
+                         (sockaddr*) &sendSockAddr, sizeof(sendSockAddr));
+    if(status < 0)
+    {
+        cout<<"Error connecting to socket!"<<endl;// break;
+    }
+    cout << "Connected to the server!" << endl;
+    int bytesRead, bytesWritten = 0;
+    struct timeval start1, end1;
+    gettimeofday(&start1, NULL);
+    while(1)
+    {
+        cout << ">";
+        string data;
+        getline(cin, data);
+        memset(&msg, 0, sizeof(msg));//clear the buffer
+        strcpy(msg, data.c_str());
+        if(data == "exit")
+        {
+            send(clientSd, (char*)&msg, strlen(msg), 0);
+            break;
+        }
+        bytesWritten += send(clientSd, (char*)&msg, strlen(msg), 0);
+        cout << "Awaiting server response..." << endl;
+        memset(&msg, 0, sizeof(msg));//clear the buffer
+        bytesRead += recv(clientSd, (char*)&msg, sizeof(msg), 0);
+        if(!strcmp(msg, "exit"))
+        {
+            cout << "Server has quit the session" << endl;
+            break;
+        }
+        cout << "Server: " << msg << endl;
+    }
+    gettimeofday(&end1, NULL);
+    close(clientSd);
+    cout << "********Session********" << endl;
+    cout << "Bytes written: " << bytesWritten << 
+    " Bytes read: " << bytesRead << endl;
+    cout << "Elapsed time: " << (end1.tv_sec- start1.tv_sec) 
+      << " secs" << endl;
+    cout << "Connection closed" << endl;
+    return 0;    
+}

old/main.cpp

@@ -0,0 +1,402 @@
+/*an attempt at pthread and network and ncurses all in the same function
+*/
+#include <iostream>
+#include <ostream>
+#include <string>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/uio.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <curses.h>
+#include <fstream>
+#include <pthread.h>
+
+#include <vector>   //try to make the program work without this without doing anything awful but do it later
+
+using namespace std;
+
+const int PORT_NUM = 8888;
+const string IP_ADDRESS = "127.0.0.1";
+const int DEFAULT_CUR_X = 2;//the x position of the preferred default cursor position for message entry
+const int DEFAULT_CUR_Y = 12;//the x position of the preferred default cursor position for message entry
+
+int mode = 0;       //what mode is this program in. 0 = nothing. 1 = server. 2 = client
+int serverSocketDescriptor;//a global variable for storing the server socket descriptor.
+int clientSocketDescriptor;
+vector<int> clientSocketDescriptors;//a global vector for storing client socket descriptors
+
+//keep track of the session time using global variables
+struct timeval start1, end1;
+
+//also keep track of the amount of data sent as well
+int bytesRead, bytesWritten = 0;
+
+const int LOG_LENGTH = 10;//number of text log file lines to display
+int linePos = 0;    //counter for what current position to use in the file
+
+string logFileName;//the name of the log file
+
+pthread_t client_wait_thread;
+
+int writeToFile(string path, string line, bool incLineNum = true);
+void* waitForClient(void* argss);
+void* pollForClient();
+void* pollForSever(void* args);
+
+//clears ncurses rows in a specific region only
+void clearRows(int startingRow, int endingRow)
+{
+    //preserve the cursor location
+    int yBefore, xBefore;
+    getyx(stdscr, yBefore, xBefore);
+
+    for (int i = startingRow; i < endingRow; i++)
+    {
+        move(i, 0);
+        clrtoeol();//clear to end of line
+    }
+
+    //restore original cursor location
+    move(yBefore, xBefore);
+}
+
+//display a file using ncurses
+int displayFile(string path, int startLineNum = 0, int numLines = 10)
+{
+    ifstream file(path);
+    if (!file)
+    {
+        return 1;
+    }
+    else
+    {
+        clearRows(0, numLines+1);       //clear the chat area
+        int lineNum = 0;
+        string line;
+
+        //print each line directly to the screen
+        int num = 0;
+        while(getline(file, line) && num <= numLines + startLineNum + 1) //while there is file content and the line number isn't too high
+        {
+            if (num >= startLineNum)
+            {
+                move(lineNum, 0);
+                printw("%s", line.c_str());
+                lineNum++;//increment the row number after printing each line
+            }
+            num++;
+        }
+        move(DEFAULT_CUR_Y, DEFAULT_CUR_X);
+        refresh();
+        return 0;
+    }
+}
+
+//gets the number of lines in a file. returns -1 if there was an error.
+int linesInFile(string path)
+{
+    ifstream file(path);
+    if (!file)
+    {
+        return 1;
+    }
+    else
+    {
+        int lineNum = 0;
+        string line;
+
+        int num = 0;
+        while(getline(file, line))
+        {
+            num++;
+        }
+        return num;
+    }
+}
+
+struct waitClientArgs
+{
+    sockaddr_in newSockAddr;
+    socklen_t newSockAddrSize;
+    int auxInt;//used in client mode because I didn't want to make another struct to keep track of
+};
+
+void* waitForClient(void* argss)
+{
+    waitClientArgs* args = static_cast<waitClientArgs*>(argss);
+    clientSocketDescriptor = accept(serverSocketDescriptor, (sockaddr *)&args->newSockAddr, &args->newSockAddrSize);
+    if (clientSocketDescriptor >= 0)
+    {
+        writeToFile(logFileName, "client connected");
+        if (linesInFile(logFileName) > LOG_LENGTH)
+        {
+            linePos++;
+        }
+        displayFile(logFileName, linePos, LOG_LENGTH);
+    }
+    delete args;//delete to avoid memory leaks
+
+    return pollForClient();
+}
+
+void* pollForClient()
+{
+    char msg[1024];
+    while(1)
+    {
+        //receive a message from the client (listen)
+        memset(&msg, 0, sizeof(msg));//clear the buffer
+        bytesRead += recv(clientSocketDescriptor, (char*)&msg, sizeof(msg), 0);
+        writeToFile(logFileName, msg);//write the client's message to file
+        if (linesInFile(logFileName) > LOG_LENGTH)
+        {
+            linePos++;
+        }
+        displayFile(logFileName, linePos, LOG_LENGTH);
+    }
+
+    return nullptr;
+}
+
+//set up a suitable server for this
+int setupServer(int port)
+{    
+    //setup a socket and connection tools
+    sockaddr_in servAddr;
+    bzero((char*)&servAddr, sizeof(servAddr));
+    servAddr.sin_family = AF_INET;
+    servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
+    servAddr.sin_port = htons(port);
+ 
+    //open stream oriented socket with internet address
+    //also keep track of the socket descriptor
+    serverSocketDescriptor = socket(AF_INET, SOCK_STREAM, 0);
+    if(serverSocketDescriptor < 0)
+    {
+        //keeps from bricking the terminal if this happens
+        endwin();
+
+	fprintf(stderr, "Error establishing the server socket!\n");
+        exit(0);
+    }
+    //bind the socket to its local address
+    int bindStatus = bind(serverSocketDescriptor, (struct sockaddr*) &servAddr, 
+        sizeof(servAddr));
+    if(bindStatus < 0)
+    {
+        //keeps from bricking the terminal if this happens
+        endwin();
+
+	fprintf(stderr, "Error binding socket to local address!\n");
+        exit(0);
+    }
+    writeToFile(logFileName, "Waiting for a client to connect...");
+    //listen for up to 5 requests at a time
+    listen(serverSocketDescriptor, 5);
+    //receive a request from client using accept
+    //we need a new address to connect with the client
+    sockaddr_in newSockAddr;
+    socklen_t newSockAddrSize = sizeof(newSockAddr);
+    //accept, create a new socket descriptor to 
+    //handle the new connection with client
+    auto* aaa = new waitClientArgs{};//it looks stupid but it works
+    aaa->newSockAddr = newSockAddr;
+    aaa->newSockAddrSize = newSockAddrSize;
+    int rc = pthread_create(&client_wait_thread, nullptr, waitForClient, aaa);
+    pthread_detach(client_wait_thread);
+    writeToFile(logFileName, "Server started sucessfully");
+    gettimeofday(&start1, NULL);
+    
+    return 0;
+}
+
+void closeServer()
+{
+    long e = end1.tv_sec - start1.tv_sec; /* the linter freaks out if you don't save it as a variable */
+
+    //we need to close the socket descriptors after we're all done
+    gettimeofday(&end1, NULL);
+    close(clientSocketDescriptor);
+    close(serverSocketDescriptor);
+
+    /* Don't just die silently */
+    printf("********Session********\n");
+    printf("Bytes written: %i\nBytes Read: %i\n", bytesWritten, bytesRead);
+    printf("Elapsed time: %ld\n secs\n", e);
+    printf("Connection closed...\n");
+}
+
+void closeClient()
+{
+    long e = end1.tv_sec - start1.tv_sec;
+
+    gettimeofday(&end1, NULL);
+    close(clientSocketDescriptor);
+    printf("********Session********");
+    printf("Bytes written: %i\nBytes read: %i\n", bytesWritten, bytesRead);
+    printf("Elapsed time: %ld\n secs\n", e);
+    printf("Connection closed...\n");
+}
+
+void* pollForSever(void* args)
+{
+    waitClientArgs* aaa = static_cast<waitClientArgs*>(args);
+    int socketDescriptor = (int)aaa->auxInt;
+    char msg[1024];
+    while(1)
+    {
+        memset(&msg, 0, sizeof(msg));//clear the buffer
+        bytesRead += recv(socketDescriptor, (char*)&msg, sizeof(msg), 0);
+        
+        //not needed for proofs of concept testing
+        /*if(!strcmp(msg, "exit"))
+        {
+            writeToFile(logFileName, msg);
+            displayFile(logFileName, linePos, LOG_LENGTH);
+            break;
+        }*/
+        //cout << "Server: " << msg << endl;
+	//printf("Server: %s\n");
+        writeToFile(logFileName, msg);
+        if (linesInFile(logFileName) > LOG_LENGTH)
+        {
+            linePos++;
+        }
+        displayFile(logFileName, linePos, LOG_LENGTH);
+    }
+}
+
+void setupClient()
+{
+    //we need 2 things: ip address and port number, in that order
+    //if(argc != 3)
+    //{
+    //    cerr << "Usage: ip_address port" << endl; exit(0); 
+    //} //grab the IP address and port number 
+    //create a message buffer 
+    char msg[1024]; 
+    //setup a socket and connection tools 
+    struct hostent* host = gethostbyname(IP_ADDRESS.c_str()); 
+    sockaddr_in sendSockAddr;   
+    bzero((char*)&sendSockAddr, sizeof(sendSockAddr)); 
+    sendSockAddr.sin_family = AF_INET; 
+    sendSockAddr.sin_addr.s_addr = 
+        inet_addr(inet_ntoa(*(struct in_addr*)*host->h_addr_list));
+    sendSockAddr.sin_port = htons(PORT_NUM);
+    clientSocketDescriptor = socket(AF_INET, SOCK_STREAM, 0);
+    //try to connect...
+    int status = connect(clientSocketDescriptor,
+                         (sockaddr*) &sendSockAddr, sizeof(sendSockAddr));
+    if(status < 0)
+    {
+        writeToFile(logFileName, "Error connecting to socket!");
+    }
+    writeToFile(logFileName, "Connected to the server!");
+    int bytesRead, bytesWritten = 0;
+    struct timeval start1, end1;
+    gettimeofday(&start1, NULL);
+    auto* aaa = new waitClientArgs{};//it looks stupid but it works
+    aaa->auxInt = clientSocketDescriptor;
+    int rc = pthread_create(&client_wait_thread, nullptr, pollForSever, aaa);
+    pthread_detach(client_wait_thread);
+}
+
+//appends a line of text to the end of a given file. returns 0 if the file existed, 1 if it didn't work
+int writeToFile(string path, string line, bool incLineNum)
+{
+    ofstream file;
+    file.open(path, ios_base::app);//open the file in append mode
+
+    if (file.is_open())
+    {
+        file << line << endl;
+        //this probably would help but theres too much broken stuff right now to be sure
+        //if (incLineNum)
+        //{
+        //    linePos++;
+        //}
+        return 0;
+    }
+    else
+    {
+        //do something if it didn't work
+        return 1;//i guess that's good enough for now
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    if (argc > 1 && argv[1][0] == 'c')
+    {
+        //client mode
+        logFileName = "client.txt";
+        mode = 2;
+    }
+    else
+    {
+        //server mode
+        logFileName = "server.txt";
+        mode = 1;
+    }
+
+    //putting this lower down to circumvent the terminal brick when the socket was already in use results in all network functonality no longer working.
+    initscr();//creates stdscr. important step
+    use_default_colors();//this apparently tells it to use default terminal colors whenever there is no color attribute applied
+
+    //printw("Starting server...");
+
+    //you have to do this to make the scrolling still work correctly if there was already content in the log file
+    linePos = linesInFile(logFileName) - LOG_LENGTH + 1;
+
+    char *userInput = new char[1024];
+    bool exit = false;
+
+    if (mode == 2)
+    {
+        writeToFile(logFileName, "CLIENT MODE");
+        setupClient();
+    }
+    else if (mode == 1)
+    {
+        writeToFile(logFileName, "SERVER MODE");
+        setupServer(PORT_NUM);
+    }
+
+    while (!exit)
+    {
+        displayFile(logFileName, linePos, LOG_LENGTH);
+
+        //scroll along the screen if and when required so that it stays in sync
+        if (linesInFile(logFileName) > LOG_LENGTH)
+        {
+            linePos++;
+        }
+
+        move(12, 0);
+        printw("> ");
+        getstr(userInput);
+        writeToFile(logFileName, userInput);
+        if (mode == 1)
+        {
+            send(clientSocketDescriptor, (char*)userInput, strlen(userInput), 0);
+        }
+        else
+        {
+            send(clientSocketDescriptor, (char*)userInput, strlen(userInput), 0);
+        }
+    }
+
+    endwin();
+    closeServer();
+
+    return 0;
+}
+

src/.clang-format

@@ -0,0 +1,20 @@
+{
+    "BasedOnStyle": "LLVM",
+    "UseTab": "Always",
+    "IndentWidth": 8,
+    "TabWidth": 8,
+    "ColumnLimit": 100,
+    "LineEnding": "LF",
+    "RemoveBracesLLVM": true,
+    "AlwaysBreakAfterReturnType": "AllDefinitions",
+    "BreakBeforeBraces": "Custom",
+    "BraceWrapping": {
+	"AfterFunction": true,
+	"AfterClass": false,
+	"AfterControlStatement": false,
+	"AfterNamespace": false,
+	"AfterStruct": false,
+	"BeforeElse": false,
+	"BeforeCatch": false
+    }
+}

src/Makefile

@@ -0,0 +1,20 @@
+CXX = g++
+CXXFLAGS = -pthread -Wall -Wextra -O2 -std=c++17
+LDFLAGS =  -lcurses
+TARGET = ct
+CXX_SRCS = main.cc net.cc file.cc display.cc
+CXX_OBJS = $(CXX_SRCS:.cc=.o)
+
+all: $(TARGET)
+
+$(TARGET): $(CXX_OBJS)
+	$(CXX) $(CXXFLAGS) $(LDFLAGS) $(CXX_OBJS) -o $(TARGET) $(LDFLAGS)
+
+%.o: %.cc
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+.PHONY: clean
+
+clean:
+	rm -f *.o $(TARGET)
+

src/README.md

@@ -0,0 +1,6 @@
+# refactor v1
+
+I'm trying to split this up into multiple pieces but that probably involves using fewer global variables and passing the
+same data between the functions that use them.
+
+global variables will use `snake_case` and global constants will use `SCREAMING_SNAKE_CASE`.

src/chat.h

@@ -0,0 +1,30 @@
+#ifndef CHAT_H
+#define CHAT_H
+
+#include <string>
+
+#include <netinet/in.h>
+#include <pthread.h>
+
+#define CURSOR_DEFAULT_POSITION_X 2
+#define CURSOR_DEFAULT_POSITION_Y 12
+#define LOG_LENGTH 10
+
+typedef struct __wclient_args_t wclient_args_t;
+
+void *await_client(void *a);
+void big_panic_msg(void);
+void clear_rows(int s, int e);
+int count_lines(std::string p);
+int file_disp(std::string p, int lnstart, int lncount = 10);
+int log_append(std::string p, std::string ln);
+int log_linect(std::string p);
+void client_start(std::string ip, int port, int *sock, std::string log, pthread_t *thr);
+void client_stop(struct timeval *start, struct timeval *end, int *sock, int *bread, int *bwrit);
+void *poll_client(int *sock, int *bread, std::string log, int *lpos);
+void *poll_server(void *args);
+int
+server_start(int port, int *sock, std::string log, pthread_t *thr, struct timeval *ts);
+void server_stop(struct timeval *start, struct timeval *end, int *sock, int *bread, int *bwrit);
+
+#endif

src/display.cc

@@ -0,0 +1,50 @@
+#include <fstream>
+
+#include <curses.h>
+
+#include "chat.h"
+
+void
+clear_rows(int s, int e)
+{
+	/* preserve cursor location */
+	int x_bef;
+	int y_bef;
+
+	getyx(stdscr, y_bef, x_bef);
+
+	for (int i = s; i < e; i++) {
+		move(i, 0);
+		clrtoeol();
+	}
+
+	move(y_bef, x_bef);
+}
+
+int
+file_disp(std::string p, int lnstart, int lncount)
+{
+	std::ifstream f(p);
+
+	if (!f)
+		return 1;
+
+	int i = 0;
+	int ln_no = 0;
+	std::string ln;
+
+	clear_rows(0, lncount + 1); /* clear chat window */
+
+	while (getline(f, ln) && i <= ln_no + lnstart + 1) {
+		if (i >= lnstart) {
+			move(ln_no, 0);
+			printw("%s", ln.c_str());
+			ln_no++;
+		}
+		i++;
+	}
+
+	move(CURSOR_DEFAULT_POSITION_Y, CURSOR_DEFAULT_POSITION_X);
+	refresh();
+	return 0;
+}

src/file.cc

@@ -0,0 +1,41 @@
+#include <algorithm>
+#include <fstream>
+#include <iterator>
+
+#include "chat.h"
+
+int
+count_lines(std::string p)
+{
+	int c = 0;
+
+	std::ifstream f(p);
+	if (!f)
+		return c;
+
+	/* Apparently this is the most efficient way to count all lines in a file. How revolting! */
+	c = std::count(std::istreambuf_iterator<char>(f), std::istreambuf_iterator<char>(), '\n');
+
+	return c;
+}
+
+int
+log_append(std::string p, std::string ln)
+{
+	std::ofstream f;
+
+	f.open(p, std::ios_base::app);
+	if (!f.is_open())
+		return 1;
+
+	f << ln << std::endl;
+
+	f.close();
+
+	// "this probably would help but theres too much broken stuff right now to be sure" - scott
+	// bool inclnum should be added to function if we do decide to use this block:
+	// if (inclnum)
+	//	line_position++;
+
+	return 0;
+}

src/main.cc

@@ -0,0 +1,150 @@
+#include <fstream>
+#include <string>
+
+#include <arpa/inet.h>
+#include <bits/types/struct_timeval.h>
+#include <curses.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "chat.h"
+
+typedef enum { NO_MODE = 0, SERVER_MODE = 1, CLIENT_MODE = 2 } chatmode_t;
+
+chatmode_t mode = NO_MODE;
+
+int line_position = 0;
+
+struct timeval time_start;
+struct timeval time_end;
+int bytes_read;
+int bytes_written;
+
+int listen_port = 9999;
+std::string listen_ip_address = "127.0.0.1";
+
+std::string log_path;
+
+int socket_descriptor_server;
+int socket_descriptor_client;
+
+pthread_t client_wait_thread;
+
+int
+main(int argc, char *argv[])
+{
+	int err = 0;
+	char *usr_in = new char[1024];
+	bool quit = false;
+
+	if (argc > 1 && (!strcmp(argv[1], "client")))
+		mode = CLIENT_MODE;
+	else
+		mode = SERVER_MODE;
+
+	initscr();
+	use_default_colors();
+
+	line_position = count_lines(log_path) - LOG_LENGTH + 1;
+
+	switch (mode) {
+	case CLIENT_MODE:
+		log_append(log_path, "CLIENT MODE");
+		client_start(listen_ip_address, listen_port, &socket_descriptor_client, log_path,
+			     &client_wait_thread);
+		break;
+	case SERVER_MODE:
+		log_append(log_path, "SERVER MODE");
+		err = server_start(listen_port, &socket_descriptor_server, log_path,
+				   &client_wait_thread, &time_start);
+		if (err)
+			goto panic_no_server_sock;
+		break;
+	default:
+		goto panic_no_mode;
+		break;
+	}
+
+	while (!quit) {
+		file_disp(log_path, line_position, LOG_LENGTH);
+
+		if (count_lines(log_path) > LOG_LENGTH)
+			line_position++;
+
+		/* prompt for input */
+		move(CURSOR_DEFAULT_POSITION_Y, 0);
+		printw("> ");
+
+		/* await input */
+		getstr(usr_in);
+		log_append(log_path, usr_in);
+		send(socket_descriptor_client, (char *)usr_in, strlen(usr_in), 0);
+	}
+
+	/* Final exit point if everything goes OK */
+
+	endwin();
+
+	switch (mode) {
+	case CLIENT_MODE:
+		client_stop(&time_start, &time_end, &socket_descriptor_client, &bytes_read,
+			    &bytes_written);
+		break;
+	case SERVER_MODE:
+		server_stop(&time_start, &time_end, &socket_descriptor_server, &bytes_read,
+			    &bytes_written);
+		break;
+	default:
+		goto panic_no_mode;
+		break;
+	}
+
+	return 0;
+
+panic_no_mode:
+	big_panic_msg();
+
+	if (mode == NO_MODE)
+		fprintf(stderr, "Fatal: Mode was not set!\n");
+	else
+		fprintf(stderr, "Fatal: Mode was set to invalid enum %i\n", mode);
+
+	return 1;
+
+panic_no_server_sock:
+	big_panic_msg();
+
+	fprintf(stderr, "Fatal: Could not establish server socket!\n");
+	return 1;
+}
+
+/*
+ * For when things go really really bad.
+ * Check if there is a window and if so, close it.
+ * Spit out a really loud obnoxious error afterwards.
+ */
+void
+big_panic_msg(void)
+{
+	if (!isendwin())
+		endwin();
+
+	fprintf(stderr, "-----FATAL ERROR, THIS SHOULD NEVER HAPPEN-----\n");
+	usleep(400 * 1000);
+	fprintf(stderr, "You may ask yourself...      how do I work this?\n");
+	putchar(7);
+	usleep(400 * 1000);
+	fprintf(stderr, "And you may find yourself... past the point of return 0;!\n");
+	putchar(7);
+	usleep(400 * 1000);
+	fprintf(stderr, "And you may ask yourself...  well, how did I get here?\n");
+	putchar(7);
+}

src/net.cc

@@ -0,0 +1,211 @@
+#include <string>
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <pthread.h>
+#include <string.h>
+#include <strings.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "chat.h"
+
+typedef struct __wclient_args_t {
+	sockaddr_in new_addr;
+	socklen_t new_addr_siz;
+	int aux;
+
+	int *bread;
+	int *sock;
+	std::string log;
+	int *lpos;
+} wclient_args_t;
+
+typedef struct __wserver_args_t {
+	sockaddr_in new_addr;
+	socklen_t new_addr_siz;
+	int aux;
+
+	int *bread;
+	int *lpos;
+	std::string log;
+} wserver_args_t;
+
+/* client_start(listen_ip, listen_port, &socket_descriptor_client, log_path, &client_wait_thread);
+ */
+void
+client_start(std::string ip, int port, int *sock, std::string log, pthread_t *thr)
+{
+	char msg[1024];
+	int bread;
+	int bwrit;
+	sockaddr_in send_addr;
+
+	struct timeval time_start;
+	struct timeval time_end;
+	struct hostent *host = gethostbyname(ip.c_str());
+
+	auto *a = new wclient_args_t{};
+
+	bzero((char *)&send_addr, sizeof(send_addr));
+	send_addr.sin_family = AF_INET;
+	send_addr.sin_addr.s_addr = inet_addr(inet_ntoa(*(struct in_addr *)*host->h_addr_list));
+	send_addr.sin_port = htons(port);
+	*sock = socket(AF_INET, SOCK_STREAM, 0);
+
+attempt_client_connection:
+	int stat = connect(*sock, (sockaddr *)&send_addr, sizeof(send_addr));
+	if (stat < 0) {
+		log_append(log, "Error connecting to socket, retrying...");
+		goto attempt_client_connection;
+	}
+
+	log_append(log, "Connected to the server!");
+	bread = bwrit = 0;
+
+	gettimeofday(&time_start, NULL);
+
+	a->aux = *sock;
+	pthread_create(thr, nullptr, poll_server, a);
+	pthread_detach(*thr);
+}
+
+int
+server_start(int port, int *sock, std::string log, pthread_t *thr, struct timeval *ts)
+{
+	auto *a = new wclient_args_t{};
+	sockaddr_in srv_addr;
+	sockaddr_in newsock;
+	socklen_t newsock_siz = sizeof(newsock);
+	int bstat;
+	int rc;
+
+	/* set up socket and connection tools */
+	bzero((char *)&srv_addr, sizeof(srv_addr));
+	srv_addr.sin_family = AF_INET;
+	srv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+	srv_addr.sin_port = htons(port);
+
+	/* open stream-oriented socket w inet addr and track sock descriptor */
+	*sock = socket(AF_INET, SOCK_STREAM, 0);
+	if (*sock < 0)
+		return 1;
+
+	/* bind sock to its local addr */
+	bstat = bind(*sock, (struct sockaddr *)&srv_addr, sizeof(srv_addr));
+	if (bstat < 0)
+		return 1;
+
+	log_append(log, "Waiting for a client to connect...");
+
+	/* listen for up to 5 simultaneous requests */
+	listen(*sock, 5);
+	a->new_addr = newsock;
+	a->new_addr_siz = newsock_siz;
+
+	rc = pthread_create(thr, nullptr, await_client, a);
+
+	pthread_detach(*thr);
+
+	log_append(log, "Server started successfully.");
+
+	gettimeofday(ts, NULL);
+
+	return 0;
+}
+
+void *
+await_client(void *args)
+{
+	wclient_args_t *a = static_cast<wclient_args_t *>(a);
+
+	*a->sock = accept(*a->sock, (sockaddr *)&a->new_addr, &a->new_addr_siz);
+
+	if (*a->sock >= 0) {
+		log_append(a->log, "client connected");
+
+		if (count_lines(a->log) > LOG_LENGTH)
+			++*a->lpos;
+
+		file_disp(a->log, *a->lpos, LOG_LENGTH);
+	}
+
+	/* get what we need for the return and throw the rest away */
+	int *s = a->sock;
+	int *b = a->bread;
+	std::string l = a->log;
+	int *p = a->lpos;
+	delete a;
+
+	return poll_client(s, b, l, p);
+}
+
+void *
+poll_client(int *sock, int *bread, std::string log, int *lpos)
+{
+	char msg[1024];
+	for (;;) {
+		/* listen for msg from client */
+		memset(&msg, 0, sizeof(msg)); /* clear buf */
+		*bread += recv(*sock, (char *)&msg, sizeof(msg), 0);
+		log_append(log, msg);
+
+		if (count_lines(log) > LOG_LENGTH)
+			++*lpos;
+
+		file_disp(log, *lpos, LOG_LENGTH);
+	}
+
+	return nullptr;
+}
+
+void *
+poll_server(void *args)
+{
+	wserver_args_t *a = static_cast<wserver_args_t *>(args);
+	int sock_desc = (int)a->aux;
+	char msg[1024];
+
+	for (;;) {
+		memset(&msg, 0, sizeof(msg));
+		*a->bread += recv(sock_desc, (char *)&msg, sizeof(msg), 0);
+
+		log_append(a->log, msg);
+
+		if (count_lines(a->log) > LOG_LENGTH)
+			++*a->lpos;
+
+		file_disp(a->log, *a->lpos, LOG_LENGTH);
+	}
+
+	delete a;
+}
+
+void
+server_stop(struct timeval *start, struct timeval *end, int *sock, int *bread, int *bwrit)
+{
+	long e = end->tv_sec - start->tv_sec;
+
+	gettimeofday(end, NULL);
+	close(*sock);
+
+	/* Don't just die silently */
+	puts("********Session********");
+	printf("Bytes written: %i\nBytes Read: %i\n", *bwrit, *bread);
+	printf("Elapsed time: %ld\n secs\n", e);
+	puts("Connection closed...");
+}
+
+void
+client_stop(struct timeval *start, struct timeval *end, int *sock, int *bread, int *bwrit)
+{
+	long e = end->tv_sec - start->tv_sec;
+
+	gettimeofday(end, NULL);
+	close(*sock);
+	puts("********Session********");
+	printf("Bytes written: %i\nBytes read: %i\n", *bwrit, *bread);
+	printf("Elapsed time: %ld\n secs\n", e);
+	puts("Connection closed...");
+}