p1 v1.0

project1/Makefile

@@ -0,0 +1,14 @@
+all:	server-udp
+
+#if you are on a sunOS (System V) machine, you'll need to uncomment
+#the next line.
+
+#LIBS=-lsocket
+
+server-udp:	server-udp.c
+	$(CC) -o server-udp server-udp.c $(LIBS)
+
+.PHONY: clean
+
+clean:
+		-rm -f *.o server-udp

project1/server-udp.c

@@ -0,0 +1,70 @@
+#include 			<stdio.h> 			/* standard in/out procedures */
+#include 			<stdlib.h>			/* defines system calls */
+#include 			<string.h>			/* necessary for memset */
+#include			<netdb.h>
+#include 			<sys/socket.h>		/* used for all socket calls */
+#include 			<netinet/in.h>		/* used for sockaddr_in */
+#include			<arpa/inet.h>
+
+
+#define SERV_PORT 	11111				/* define our server port number */
+#define MSGLEN 		80  				/* limit incoming message size */
+
+int
+main(int argc, char** argv)
+{
+/* CREATE THE SOCKET */
+
+	struct sockaddr_in servaddr; 		/* our server's address */
+	struct sockaddr_in cliaddr;			/* the client's address */
+	int sockfd; 						/* Initialize our socket */
+	socklen_t addrlen = sizeof(cliaddr);/* length of address' */
+	int recvlen;						/* number of bytes recieved */
+	int msgnum = 0;						/* the messages we reveive in order */
+	char buf[MSGLEN];			/* the incoming message */
+
+/* create a UDP/IP socket */
+
+	if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+	{
+		perror("cannot create socket");
+		return 0;
+	}
+				
+/*	printf("created socket descriptor = %d\n", sockfd);  */
+
+/* INADDR_ANY = IP address and socket =  11111, modify SERV_PORT to change */
+	memset((char *)&servaddr, 0, sizeof(servaddr));
+
+
+	servaddr.sin_family 	 = AF_INET;
+	/* host-to-network-long conversion (htonl) */
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+	/* host-to-network-short conversion (htons) */
+	servaddr.sin_port 		 = htons(SERV_PORT);
+
+
+	if (bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
+		perror("bind failed");
+		return 0;
+	}
+
+/* loop, listen for client, print received, reply to client */
+	for(;;) {
+		printf("waiting for client message on port %d\n", SERV_PORT);
+		recvlen = recvfrom(sockfd, buf, MSGLEN, 0, (struct sockaddr *)&cliaddr, &addrlen);
+		printf("heard %d bytes\n", recvlen);
+		if (recvlen > 0) {
+			buf[recvlen] = 0;
+			printf("I heard this: \"%s\"\n", buf);
+	}
+	else
+		printf("lost the connection to client\n");
+	sprintf(buf, "Message #%d received\n", msgnum++);
+	printf("reply sent \"%s\"\n", buf);
+	if (sendto(sockfd, buf, strlen(buf), 0, (struct sockaddr *)&cliaddr, addrlen) < 0)
+		perror("sendto");
+	/* continues to loop, use "Ctrl+C" to terminate listening */
+
+	}
+}

project1/tags

@@ -0,0 +1,7 @@
+!_TAG_FILE_FORMAT	2	/extended format; --format=1 will not append ;" to lines/
+!_TAG_FILE_SORTED	1	/0=unsorted, 1=sorted, 2=foldcase/
+!_TAG_PROGRAM_AUTHOR	Darren Hiebert	/dhiebert@users.sourceforge.net/
+!_TAG_PROGRAM_NAME	Exuberant Ctags	//
+!_TAG_PROGRAM_URL	http://ctags.sourceforge.net	/official site/
+!_TAG_PROGRAM_VERSION	5.9~svn20110310	//
+main	server-udp.c	/^main(void)$/;"	f