socket udp

//server.c
#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<sys/types.h>
#include<stdlib.h>
#if 1
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#define CLDUDTSOCKET int
#define udt_socket socket
#define udt_accept accept
#define udt_getlasterror_desc() "not impl"
#define udt_bind bind
#define udt_listen listen
#define udt_send send
#define udt_recv recv
#define udt_close close
#else
#define CLD_SUPPORT_UDT
#include "cld_udt.h"
#endif

#define PORT 5701
#define MAXDATASIZE 100

int main()
{
    CLDUDTSOCKET sockfd;
    struct sockaddr_in server;
    struct sockaddr_in client;
    socklen_t addrlen;
    int num;
    char buf[MAXDATASIZE];

    if((sockfd = udt_socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
       perror("Creatingsocket failed.");
       exit(1);
    }

    bzero(&server,sizeof(server));
    server.sin_family=AF_INET;
    server.sin_port=htons(PORT);
    server.sin_addr.s_addr= htonl (INADDR_ANY);
    if(udt_bind(sockfd, (struct sockaddr *)&server, sizeof(server)) == -1)
    {
       perror("Bind()error.");
       exit(1);
    }

    if (udt_listen(sockfd, 2)< 0)
    {
       perror("listen()error.");
        exit(1);
    }
    while(1)
    {
        struct sockaddr client;
        int len = sizeof(client);
        CLDUDTSOCKET so = udt_accept(sockfd, &client, &len);
       num =udt_recv(so, buf, MAXDATASIZE,0);

       if (num < 0)
       {
           printf("udt_recv fail, %s\n", udt_getlasterror_desc());
          exit(1);
       }

       buf[num] = '\0';
       printf("You got a message (%s) from client.\n", buf);
       udt_send(so,"Welcometo my server.\n",22,0);
        udt_close(so);
    }
    udt_close(sockfd);
}

//client.c
//执行命令./ udpclient 127.0.0.1 hello
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <netdb.h>
#if 1
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>

#define CLDUDTSOCKET int
#define udt_socket socket
#define udt_connect connect
#define udt_accept accept
#define udt_bind bind
#define udt_listen listen
#define udt_send send
#define udt_recv recv
#define udt_close close
#else
#define CLD_SUPPORT_UDT
#include "cld_udt.h"
#endif

#define PORT 5701
#define MAXDATASIZE 100

int main(int argc, char *argv[])
{
    CLDUDTSOCKET sockfd, num;
    char buf[MAXDATASIZE];

    struct hostent *he;
    struct sockaddr_in server,peer;

    if (argc !=3)
    {
       printf("Usage: %s \n",argv[0]);
       exit(1);
    }

    if ((sockfd=udt_socket(AF_INET, SOCK_STREAM,0))==-1)
    {
       printf("socket() error\n");
       exit(1);
    }

    bzero(&server,sizeof(server));
    server.sin_family = AF_INET;
    server.sin_port = htons(PORT);
    server.sin_addr.s_addr= inet_addr(argv[1]);

    if (udt_connect(sockfd, (struct sockaddr*)&server, sizeof(server)) < 0)
    {
       printf("udt_connect() error\n");
       exit(1);
    }

    udt_send(sockfd, argv[2],strlen(argv[2]),0);
    while (1)
    {
        num=udt_recv(sockfd,buf,MAXDATASIZE,0);
       if(num <=0)
       {
          printf("udt_recv() error\n");
          exit(1);
       }

       printf("Server Message:%s\n",buf);
       break;
    }

    udt_close(sockfd);
}

Makefile

sc:
    gcc 1.c -o s
    gcc c2.c -o c
all:
    gcc 1.c ./libudt.so -pthread -o s
    gcc c2.c -o c ./libudt.so -pthread