Linux RPC远程调用示例

来源：互联网发布：数据运维服务编辑：程序博客网时间：2024/06/11 11:06

客户端给服务器端发送一个包含2给整数的字符串，服务器端发回他们的和。

1. radd.x

/* radd.x *//* RPC declarations for add program *//* http://zhoulifa.bokee.com/6129455.html *//* ------------------------------------------------------------------* RADDPROG -- remote program that provides Two Int Add* ------------------------------------------------------------------ */program RADDPROG  /* name of remote program ( not used ) */{    version RADDVERS  /* declaration of version ( see below ) */    {        int IntAdd ( string )     = 1;  /* first procedure in this program */    } = 1;  /* definition of the program version */} = 0x30090949;  /* remote program number ( must be unique ) */

上面代码的含义是，服务器端包含一个函数IntAdd，其参数为string，返回int。

2. 使用rpcgen生成所需文件

server端

rpcgen -Ss -o radd_srv_func.c radd.x

client端

rpcgen -Sc -o radd_client.c radd.x

Makefile文件

rpcgen -Sm radd.x > Makefile

3. 修改radd_srv_func.c，添加函数功能

#include "radd.h"int *intadd_1_svc(char **argp, struct svc_req *rqstp){static int  result;/* * insert server code here */int num1, num2;sscanf(*argp, "%d %d", &num1, &num2);result = num1 + num2;return &result;}

4. 修改radd_client.c
#include "radd.h"voidraddprog_1(char *host){CLIENT *clnt;int  *result_1;char * intadd_1_arg;#ifndefDEBUGclnt = clnt_create (host, RADDPROG, RADDVERS, "udp");if (clnt == NULL) {clnt_pcreateerror (host);exit (1);}#endif/* DEBUG */char word[256];while(1) {printf("Please input two integers: ");fgets(word, 256, stdin);intadd_1_arg = word;result_1 = intadd_1(&intadd_1_arg, clnt);if (result_1 == (int *) NULL) {clnt_perror (clnt, "call failed");}printf("sum = %d\n", *result_1);}#ifndefDEBUGclnt_destroy (clnt);#endif /* DEBUG */}intmain (int argc, char *argv[]){char *host;if (argc < 2) {printf ("usage: %s server_host\n", argv[0]);exit (1);}host = argv[1];raddprog_1 (host);exit (0);}

5. 修改Makefile
# This is a template Makefile generated by rpcgen# ParametersCLIENT = radd_clientSERVER = radd_serverSOURCES_CLNT.c = SOURCES_CLNT.h = SOURCES_SVC.c = SOURCES_SVC.h = SOURCES.x = radd.xTARGETS_SVC.c = radd_svc.c radd_srv_func.cTARGETS_CLNT.c = radd_clnt.c  radd_client.cTARGETS = radd.h  radd_clnt.c radd_svc.cOBJECTS_CLNT = $(SOURCES_CLNT.c:%.c=%.o) $(TARGETS_CLNT.c:%.c=%.o)OBJECTS_SVC = $(SOURCES_SVC.c:%.c=%.o) $(TARGETS_SVC.c:%.c=%.o)# Compiler flags CFLAGS += -g LDLIBS += -lnslRPCGENFLAGS = # Targets all : $(CLIENT) $(SERVER)$(TARGETS) : $(SOURCES.x) rpcgen $(RPCGENFLAGS) $(SOURCES.x)$(OBJECTS_CLNT) : $(SOURCES_CLNT.c) $(SOURCES_CLNT.h) $(TARGETS_CLNT.c) $(OBJECTS_SVC) : $(SOURCES_SVC.c) $(SOURCES_SVC.h) $(TARGETS_SVC.c) $(CLIENT) : $(OBJECTS_CLNT) $(LINK.c) -o $(CLIENT) $(OBJECTS_CLNT) $(LDLIBS) $(SERVER) : $(OBJECTS_SVC) $(LINK.c) -o $(SERVER) $(OBJECTS_SVC) $(LDLIBS) clean: $(RM) core $(TARGETS) $(OBJECTS_CLNT) $(OBJECTS_SVC) $(CLIENT) $(SERVER)

主要是这三行
TARGETS_SVC.c = radd_svc.c radd_srv_func.cTARGETS_CLNT.c = radd_clnt.c  radd_client.cTARGETS = radd.h  radd_clnt.c radd_svc.c

6. make，然后即可运行生成的可执行文件
运行server端，需要安装portmap，并执行portmap start命令。(开启端口映射功能)
root@ubuntu:~/下载/RPC/add# ./radd_client 127.0.0.1Please input two integers: 5 5sum = 10Please input two integers: 6 6sum = 12


	
					
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