Question

请帮我解释一下这段程序要表达的意思，万分感谢！

{
socket(0, Sn_MR_TCP, 5000, 0);
listen(0);
if( getSn_SR(0) == SOCK_LISTEN)
{
printf("Listen Mode");
}
while(getSn_RX_RSR(0) ==0 );
printf("got data \r\n");
len = getSn_RX_RSR(0);
printf("the size is %u \r\n",len);

uint8 * TX_BUFFER = (uint8 *) TX_BUF;
uint8 * RX_BUFFER = (uint8 *) RX_BUF;
if( len > MAX_SIZE)
len = MAX_SIZE;
len = recv(0,RX_BUFFER,len);
send(0,RX_BUFFER,len);
}

Answer 1

{
socket(0, Sn_MR_TCP, 5000, 0); //调用socket函数
listen(0);//调用listen函数
if( getSn_SR(0) == SOCK_LISTEN)//若 getSn_SR(0)等于 SOCK_LISTEN，执行：printf("Listen Mode");屏幕显示Listen Mode
{
printf("Listen Mode");
}
while(getSn_RX_RSR(0) ==0 );//等待函数getSn_RX_RSR返回0
printf("got data \r\n");//屏幕显示：got data
len = getSn_RX_RSR(0); //蒋函数getSn_RX_RSR(0)值赋给len
printf("the size is %u \r\n",len);//显示：the size is 和无符号数，len

uint8 * TX_BUFFER = (uint8 *) TX_BUF;//定义uint8型指针，指向TX_BUF
uint8 * RX_BUFFER = (uint8 *) RX_BUF;定义uint8型指针，指向RX_BUF

if( len > MAX_SIZE)//若len大于MAX_SIZE，将MAX_SIZE赋给len
len = MAX_SIZE;
len = recv(0,RX_BUFFER,len);//蒋recv函数返回值赋给len
send(0,RX_BUFFER,len);//调用send
} //这个程序是一个Socket程序，很难的

Answer 2

socket函数