Linux网络编程 recvmsg()函数实例-白红宇

Linux网络编程 recvmsg()函数实例

阅读量：6550 次

发布时间：2019-06-24

本文共 1589 字，大约阅读时间需要 5 分钟。

本程序是recvmsg()函数的简单应用:

/* ************************************************************************  *       Filename:  msg.c  *    Description:   *        Version:  1.0  *        Created:  2011年08月16日 20时07分52秒  *       Revision:  none  *       Compiler:  gcc  *         Author:  YOUR NAME (),  *        Company:   * ************************************************************************/  #include 
     
        #include 
      
         #include 
       
          #include 
        
           #include 
         
            #include 
          
            #include 
           
             void SendMsgRecvMsg() { int sock_fd; socklen_t sender_len; struct msghdr msg; struct iovec iov; struct sockaddr_in receiver_addr,sender_addr; char line[10]; sock_fd = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP); if(sock_fd < 0) { perror("socket error"); close(sock_fd); exit(0); } receiver_addr.sin_family = AF_INET; receiver_addr.sin_port = htons(5000); receiver_addr.sin_addr.s_addr = htonl(INADDR_ANY); if(bind(sock_fd,(struct sockaddr*)&receiver_addr,sizeof(receiver_addr)) < 0) { perror("bind error"); close(sock_fd); exit(0); } sender_len = sizeof(sender_addr); msg.msg_name = &sender_addr; msg.msg_namelen = sender_len; msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_iov->iov_base = line; msg.msg_iov->iov_len = 10; msg.msg_control = 0; msg.msg_controllen = 0; msg.msg_flags = 0; printf("wait...\n"); recvmsg(sock_fd,&msg,0); printf("wait is over!\n"); printf("the msg is %s\n",(char *)(msg.msg_iov->iov_base)); close(sock_fd); } int main(int argc ,char *argv[]) { SendMsgRecvMsg(); return 0; }