udp通讯发送、接收实例，可用于网络测试用

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博客：tingkman.blog.chinaunix.net 

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         由于项目需要，需要做一个udp通讯测试，主要用于测试系统的网络处理性能，将udp网络流量加到70M，通过接收并发送udp数据包，查看是否有丢包现象，内核是否被挂，

来判断硬件的网络的处理性能。

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udp 客户端文件client1.c

 

#include

#include

#include

#include

#include

#include

#include

#include

#include

#define SERV_PORT 15811

 #define MAXLINE 100

 int main(int argc, char **argv)

 {

      int sockfd,so_broadcast;

      struct sockaddr_in servaddr;

      if( argc!=2 )

            perror("usage:udpclient");

      bzero(&servaddr, sizeof(servaddr));

      servaddr.sin_family = AF_INET;

      servaddr.sin_port = htons(SERV_PORT);

      char sendline[MAXLINE];

      char recvline[MAXLINE];

      sockfd = socket(AF_INET, SOCK_DGRAM, 0);

      //?O??1?2￥ê?D?

      if (setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &so_broadcast, sizeof(so_broadcast)))

      {

            perror("setsockopt");

            return ;

      }

      if (sockfd == -1)

      {

            perror("socket");

            return ;

      }

      while(fgets(sendline, MAXLINE,stdin)!=NULL)

      {

            //????·￠?íμ?IP￡??éò?è?192.168.18.255￡-￡-?à2￥￡?￡?ò???á?·?·????é

            inet_pton(AF_INET,argv[1],&servaddr.sin_addr);

            //servaddr.sin_addr.s_addr = inet_addr(argv[1]);

            sendto(sockfd,sendline,strlen(sendline),0,(struct sockaddr *)&servaddr,sizeof(servaddr));

            memset(recvline,0,sizeof(recvline));

            int n=recvfrom(sockfd,recvline,MAXLINE,0,NULL,NULL);

            if(n>0)
  {
  printf("\nwe receive date is ");                 
  fputs(recvline,stdout);

  }

      }

      exit(0);

 }

 

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udp 服务端文件server1.c

 

#include

#include

#include

#include

#include

#include

#include

#include

#include

 

#define SERV_PORT 15811

 #define MAXLINE 100

 void dg_echo(int sockfd, struct sockaddr *pcliaddr, socklen_t clilen)

 {

      int n;

      socklen_t len;

      char mesg[MAXLINE];

      for(;;)

      {

            len = clilen;

            memset(mesg,0,sizeof(mesg));

            n=recvfrom(sockfd,mesg,MAXLINE,0,pcliaddr,&len);

            printf("Recv:%s\n",mesg);

            sendto(sockfd,mesg,n,0,pcliaddr,len);
     printf("and we send:%s to back\n",mesg);

      }

 }

 int main(int argc, char **argv)

 {

      int sockfd;

      struct sockaddr_in servaddr,cliaddr;

      sockfd=socket(AF_INET, SOCK_DGRAM, 0);

      bzero(&servaddr, sizeof(servaddr));

      servaddr.sin_family = AF_INET;

      servaddr.sin_addr.s_addr = htonl(INADDR_ANY);

      servaddr.sin_port = htons(SERV_PORT);

      bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));

      dg_echo(sockfd, (struct sockaddr *)&cliaddr,sizeof(cliaddr));

 }

 

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编译程序：

gcc server1.c -o server1

gcc client1.c -o client1

打开两个终端运行程序

./server1                                                 ./client1 127.0.0.1

在client端输入要发送的内容 tingkman

服务端打印：

Recv:tingkman

and we send:tingkman
 to back
Recv:fanjin

and we send:fanjin
 to back

客户端打印：

we receive date is tingkman

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