From 45e289dd3ac31a3311d1622ecce14828c6b751fd Mon Sep 17 00:00:00 2001
From: Dane MacFadden <dgm288@usask.ca>
Date: Fri, 20 Jun 2025 16:34:53 -0600
Subject: [PATCH] added basic single threaded program

---
 Makefile |  12 +++++
 main.c   | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 145 insertions(+)

diff --git a/Makefile b/Makefile
index e69de29..1bf9676 100644
--- a/Makefile
+++ b/Makefile
@@ -0,0 +1,12 @@
+CC = gcc
+CFLAGS = -g 
+CPPFLAGS = -Wall -Wextra -pedantic -std=gnu90
+
+chatty: main.o
+	$(CC) $(CFLAGS) -o chatty main.o -lpthread
+
+main.o: main.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c -o main.o main.c
+
+clean:
+	rm -f *.o chatty
diff --git a/main.c b/main.c
index e69de29..78149dd 100644
--- a/main.c
+++ b/main.c
@@ -0,0 +1,133 @@
+/*
+ * A simple chat program by Dane MacFadden
+ *
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <fcntl.h>
+
+#define MAXBUFSIZE 30
+
+/* Socket variables */
+int socketfd, socketfd_send;
+
+/* Address info */
+struct addrinfo hints, remote_hints;
+struct addrinfo *servinfo, *remote_servinfo; /* points to results */
+
+char *remote_machine, *local_port, *remote_port;
+
+void *input(void *arg) {
+	printf("Thread made it!\n");
+	//while (1) {
+	/*
+	 * Accept input
+	 */
+	//}
+	return 0;
+}
+
+int main(int argc, char* argv[]) {
+	pthread_t input_thread;
+	char *msg = "Test";
+	struct addrinfo *p, *q;
+	int status;	
+/*
+	if (argc != 4) {
+		printf("Wrong number of arguments\n");
+		return -1;
+	}
+*/
+
+	local_port = argv[1];
+	remote_machine = argv[2];
+	remote_port = argv[3];
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = AF_INET;
+	hints.ai_socktype = SOCK_DGRAM;
+	hints.ai_flags = AI_PASSIVE;
+
+	if ((status = getaddrinfo(NULL, local_port, &hints, &servinfo)) != 0) {
+		fprintf(stderr,"getaddrinfo error: %s\n",gai_strerror(status));
+		exit(1);
+	}
+	
+	/* Create socket */
+	for (p = servinfo; p != NULL; p = p->ai_next) {
+		if ((socketfd = socket(p->ai_family, 
+				p->ai_socktype, 
+				p->ai_protocol)) == -1) {
+			perror("listener: socket");
+			continue;
+		}
+
+		/* Set socket to nonblocking */
+		fcntl(socketfd, F_SETFL, O_NONBLOCK);
+		
+		/* Bind */
+		if (bind(socketfd, servinfo->ai_addr, servinfo->ai_addrlen) == -1) {
+			close(socketfd);
+			perror("listener: bind");
+			continue;
+		}
+
+		break;
+	}
+	if (p == NULL) {
+		fprintf(stderr, "listener: failed to bind socket\n");
+		return 2;
+	}
+	else {
+		servinfo = p;
+	}
+	
+	/* Get remote info */
+	memset(&remote_hints, 0, sizeof(remote_hints));
+	remote_hints.ai_family = AF_INET;
+	remote_hints.ai_socktype = SOCK_DGRAM;
+	
+	if ((status = getaddrinfo(remote_machine, remote_port, &remote_hints,
+					&remote_servinfo)) != 0) {
+		fprintf(stderr,"getaddrinfo error: %s\n",gai_strerror(status));
+		exit(1);
+	}
+	for (q = remote_servinfo; q != NULL; q = q->ai_next) {
+		/* Create socket */
+		if ((socketfd_send = socket(q->ai_family,
+			       	q->ai_socktype,
+			       	q->ai_protocol)) == -1) {
+			perror("talker: socket");
+			continue;
+		}
+
+		break;
+	}
+
+	if (q == NULL) {
+		fprintf(stderr, "talker: failed to create socket\n");
+		return 2;
+	}
+	else {
+		remote_servinfo = q;
+	}
+
+
+	pthread_create(&input_thread, NULL, input, (void*) msg);
+
+	pthread_join(input_thread, NULL);
+	return 0;
+}
+