init add

Makefile

@@ -0,0 +1,22 @@
+all: client server
+
+hw.h: hw.x
+	rpcgen hw.x
+
+hw_svc.c hw_clnt.c main.c: hw.h
+
+client: main.o hw_clnt.o
+	cc -o client main.o hw_clnt.o  -lnsl
+
+server: hw_server.o hw_svc.o
+	cc -o server hw_server.o hw_svc.o -lnsl
+
+.PHONY: clean
+
+clean:
+	-rm *.o
+	-rm client
+	-rm server
+	-rm hw.h
+	-rm hw_clnt.c
+	-rm hw_svc.c

README.md

@@ -1,4 +1,10 @@
-HelloWorld-RPC
+helloworld-RPC
 ==============
 
-A VERY simple rpc example to start with.
+A VERY simple rpc example to start with.
+
+Reference
+=========
+
+* http://people.cs.clemson.edu/~wayne/cpsc824/samples/simple_rpc/index.shtml
+* http://www.cs.cf.ac.uk/Dave/C/node34.html

hw.x

@@ -0,0 +1,5 @@
+program HELLO_WOLRD_PROG {
+	version HELLO_WORLD_VERS {
+		string HW(void) = 1;
+	} = 1;
+} = 0x30000824;

hw_server.c

@@ -0,0 +1,18 @@
+#include <rpc/rpc.h>
+#include "hw.h"
+
+/* 
+   Hello world RPC server -- it just returns the string.
+*/
+
+char **hw_1_svc(void *a, struct svc_req *req) {
+	static char msg[256];
+	static char *p;
+
+	printf("getting ready to return value\n");
+	strcpy(msg, "Hello world");
+	p = msg;
+	printf("Returning...\n");
+
+	return(&p);
+}

main.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <rpc/rpc.h>
+#include "hw.h"
+
+/* 
+   Simple "hello world" program that demonstrates an rpc call.
+*/
+
+main (int argc, char *argv[]) {
+
+	CLIENT *cl;
+	char **p;
+
+	if (argc != 2) {
+		printf("Usage: client hostname\n");
+		exit(1);
+	}
+
+	cl = clnt_create(argv[1], HELLO_WOLRD_PROG, HELLO_WORLD_VERS, "tcp");
+	if (cl == NULL) {
+		clnt_pcreateerror(argv[1]);
+		exit(1);
+	}
+
+	printf("Getting ready to call hello world\n");
+	p = hw_1(NULL, cl);
+
+	printf("Back from hello world\n");
+	if (p == NULL) {
+		clnt_perror(cl,argv[1]);
+		exit(1);
+	}
+
+	printf("Returned string=%s\n", *p);
+
+	return 0;
+}