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您好我有下面的代码给错误:SENDTO不上发送
if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
{
perror("socket(UDP): ");
return 0;
}
family = AF_INET;
if((remote_server_ent = gethostbyname2(hptr, family)) == NULL)
{
perror("gethostbyname2");
return 0;
}
if (family == AF_INET)
{
sin = (struct sockaddr_in *) addr;
sin->sin_family = AF_INET;
sin->sin_port = htons(server_port);;
bcopy((char *)remote_server_ent->h_addr, (char *)&(sin->sin_addr), remote_server_ent->h_length);
return (sizeof(struct sockaddr_in));
}
if (sendto(fd, msg_data_ptr, sizeof(Msg_data_hdr), 0, (struct sockaddr *)&sin, sizeof(struct sockaddr)) != sizeof(Msg_data_hdr))
{
fprintf(stderr, "Error in sending data to the server \n");
}
我的应用程序在端口7000 IP 127.0.0.1上市。 现在,当我停止我的应用程序仍发送数据,它不会给我错误。我总是得到与我正在写入的数据大小相等的写入字节。我怎么知道发送失败或不?