标题说明了一切,这也许很简单,但是我在编程方面是新手,因此是个愚蠢的问题。
我有:
printf("sourcemsg: %s", inet_ntoa(sourceMsgs[j].sin_addr));
查看在sourceMsgs [j]中保存的IP地址是否正确,是否正确,所以我假设问题出在:
nbytes = sendto(s, response , reslen, 0 , (struct sockaddr *)&sourceMsgs[i],sizeof(sourceMsgs));
// (uk: save the coordinates/address of the source of the received message
// in table sourceMsgs at index nReceivedMessages).
//I'm pretty sure what I did here is wrong
int j = nReceivedMessages;
sourceMsgs[j].sin_addr = cli_addr.sin_addr;
printf("sourcemsg: %s", inet_ntoa(sourceMsgs[j].sin_addr));
nReceivedMessages++;
total += receivedValue;
printf("<Servidor> Valor recebido: %f\n", receivedValue);
//(uk: <Server> Received value)
if(nReceivedMessages == 1){
timeout = 1;
setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, (char *)&timeout, sizeof(DWORD));
}
}
}
sprintf(response, "Received Messages: %f Total: %f", nReceivedMessages, total);
int reslen = sizeof(response);
for(i=0; i<nReceivedMessages; i++){
// (uk: transmit the content of variable response, the previously defined string, to
// all the destinations in table sourceMsgs).
nbytes = sendto(s, response , reslen, 0 , (struct sockaddr *)&sourceMsgs[i],sizeof(sourceMsgs));
如果该帖子非常不完整,我深表歉意,但这是我的第一篇。 谢谢您的提前帮助
修改:
似乎问题确实在于传递结构的长度(WSAError 10014)。 现在的代码是这样的:
nbytes = sendto(s, response , strlen(response), 0 , (struct sockaddr *)&sourceMsgs[i].sin_addr, sizeof(sourceMsgs[i].sin_addr));
我不太确定该怎么做,但是可能有另一种方法:
sourceMsgs[j].sin_addr = cli_addr.sin_addr;
printf("sourcemsg: %s", inet_ntoa(sourceMsgs[j].sin_addr));
nReceivedMessages++;
total += receivedValue;
因为我认为我的做法是一个但搞砸了。
答案 0 :(得分:0)
sendto
的参数应该是指向sockaddr
结构的指针,而不是包含它的结构的指针。
nbytes = sendto(s, response , reslen, 0 , (struct sockaddr *)&sourceMsgs[i].sin_addr,sizeof(sourceMsgs[i].sin_addr));
答案 1 :(得分:0)
传递结构的长度可能有问题。
nbytes = sendto(s, response, reslen, 0, (struct sockaddr *)&sourceMsgs[i], sizeof(sourceMsgs[i]));
// sizeof(sourceMsgs) gives - ( sizeof(sourceMsgs[1] or struct sockaddr_in) * (No. of messages in array) ).
此外,我注意到使用setsockopt设置recv超时存在问题。有关说明,请参见SO_RCVTIMEO。