linux udp 收不到广播数据,linux下udp广播不成功,

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  • Post category:linux


linux下udp广播不成功,求助?

在同一个系统下,启动udpserv,运行:udpcli 255.255.255.255,接收端口收不到消息,如果换成udp 255.* 或者udp localhost 都可以收到,唯独255.255.255.255不行,代码如下,帮忙看看是什么问题,是不是setsockopt有错

udpcli.cpp(发送端):C/C++ code#include //connect,send,recv,setsockoptµÈ

#include

#include // sockaddr_in, “man 7 ip” ,htons

#include //poll,pollfd

#include //inet_addr,inet_aton

#include //read,write

#include //gethostbyname

#include //perror

#include

#include //errno

#include

#include // memset

#include

#define MAXLINE 4096

#define EHCO_PORT 9877

#define BOOL unsigned char

int main(int argc, char **argv)

{

int sockfd;

struct sockaddr_in servaddr;

if(argc != 2)

err_quit(“usage: udpcli