代码：

server.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/un.h>

int main()
{
        //创建socket文件
        int sockfd = socket(AF_UNIX,SOCK_STREAM,0);
        if(0 > sockfd)
        {
                perror("socket");
                return EXIT_FAILURE;
        }

        //准备通信地址
        struct sockaddr_un addr = {};
        addr.sun_family = AF_UNIX;
        strcpy(addr.sun_path,"sock");
        socklen_t addrlen = sizeof(addr);

        //绑定
        if(bind(sockfd,(struct sockaddr*)&addr,addrlen))
        {
                perror("bind");
                return EXIT_FAILURE;
        }

        //监听
        if(listen(sockfd,5))
        {
                perror("listen");
                return EXIT_FAILURE;
        }

        //等待连接
        int con_fd = accept(sockfd,(struct sockaddr*)&addr,&addrlen);
        if(0 > con_fd)
        {
                perror("accept");
                return EXIT_FAILURE;
        }
        printf("有人连接成功!\n");

        char buf[4096] = {};
        size_t buf_size = sizeof(buf);

        for(;;)
        {
                printf("recv:");
                fflush(stdout);
                //接收数据
                read(con_fd,buf,buf_size);
                if(0 == strcmp(buf,"quit"))
                {
                        printf("通信结束!\n");
                        break;
                }
                printf("%s\n",buf);


                //发送数据
                printf(">>>");
                scanf("%s",buf);
                write(con_fd,buf,strlen(buf)+1);
                if(0 == strcmp(buf,"quit"))
                {
                        printf("通行结束!\n");
                        break;
                }
        }

//关闭socket
close(con_fd);
close(sockfd);
//删除文件
unlink(addr.sun_path);

}

client.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/un.h>


int main()
{
        //创建socket文件
        int sockfd = socket(AF_UNIX,SOCK_STREAM,0);
        if(0 > sockfd)
        {
                perror("socket");
                return EXIT_FAILURE;
        }

        //准备通信地址
        struct sockaddr_un addr = {};
        addr.sun_family = AF_UNIX;
        strcpy(addr.sun_path,"sock");
        socklen_t addrlen = sizeof(addr);

        //连接
        if(connect(sockfd,(struct sockaddr*)&addr,addrlen))
        {
                perror("connect");
                return EXIT_FAILURE;
        }

        char buf[4096] = {};
        size_t buf_size = sizeof(buf);

        for(;;)
        {
                //发送数据
                printf(">>>");
                scanf("%s",buf);
                write(sockfd,buf,strlen(buf)+1);
                if(0 == strcmp(buf,"quit"))
                {
                        printf("通行结束!\n");
                        break;
                }

                printf("recv:");
                fflush(stdout);
                //接收数据
                read(sockfd,buf,buf_size);
                if(0 == strcmp(buf,"quit"))
                {
                        printf("通信结束!\n");
                        break;
                }
                printf("%s\n",buf);

        }

//关闭socket
close(sockfd);

}

Android.mk

LOCAL_PATH := $(call my-dir)


include $(CLEAR_VARS)

LOCAL_CFLAGS := -Wall -Werror
LOCAL_CLANG := true

LOCAL_MODULE := server
LOCAL_SHARED_LIBRARIES := libcutils
LOCAL_SRC_FILES := server.c

include $(BUILD_EXECUTABLE)





include $(CLEAR_VARS)

LOCAL_CFLAGS := -Wall -Werror
LOCAL_CLANG := true

LOCAL_MODULE := client
LOCAL_SHARED_LIBRARIES := libcutils
LOCAL_SRC_FILES := client.c

include $(BUILD_EXECUTABLE)

结束。经常用到的一个小工具。