mqx 4.1 udp cant recv broadcase frame

[胜利何]

我现在用的MQX4.1版本中的网络通信使用中，无法接收网络的广播报文，我发送的广播报文对方能收到，请问在什么地方配置修改。
在rtcscfg.h中，定义如下
#ifndef RTCSCFG_IP_DISABLE_DIRECTED_BROADCAST
#define RTCSCFG_IP_DISABLE_DIRECTED_BROADCAST 0
#endif

#ifndef RTCSCFG_ENABLE_STATS
    #define RTCSCFG_ENABLE_STATS 1
#endif

K64广播发送，PC接收！没有问题。K64的IP设置100.100.100.100，pc地址为100.100.100.200，广播地址为100.100.100.255，用网络抓包工具，能看到K64发送出去的报文！但是K64接收不到PC的广播包内容，能接收到到PC发送给K64地址的数据包。使用的是UDP方式通信。

请问是什么原因？

[danielchen]

Hi 胜利何 

To broadcast a UDP message with RTCS, simple set the destination IP to INADDR_BROADCAST;

raddr.sin_addr.s_addr =  INADDR_BROADCAST;

UDP should recieve broadcast packets without any special socket option.

If you are using directed broadcast, please enable RTCSCFG_IP_DISABLE_DIRECTED_BROADCAST in user_config.h

Have a great day,
Daniel

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[胜利何]

I have two netports,
I want to the two ports can receive boradcast frame.
such as net 1 IP is 192.168.1.2,I want to only receive IP data to 192.168.1.2 or 192.168.1.255 address .
net 2 IP is 192.168.2.2,I want to only receive IP data to 192.168.2.2 or 192.168.2.255 address .

but if I init the IP,
for(i=0;i<2;i++)
{
.....

addr.sin_family = AF_INET;
addr.sin_port = 8812;
addr.sin_addr.s_addr = INADDR_ANY;

sendsock[i] = socket(PF_INET, SOCK_DGRAM, 0);
error = bind(sendsock[i], &addr, sizeof(addr));
....
}

the second port retun error != RTCS_OK.

if addr.sin_addr.s_addr = IPADDR(192,168.1.2) or IPADDR(192,168.2.2),
I only receive data to 192.168.1.2 or 192.168.2.2 ,I cannot receive data to 192,168.1.255 or192,168.2.255,
what shall I do?