当前位置: 技术问答>linux和unix
怎样编程发送广播包？我的这段程序发送怎么返回值总是－1？
来源: 互联网 发布时间：2015-05-08
本文导语: int main(int argc, char *argv[]) { int s，iSend; bool bBroadcast; char *sMsg="This is a test"; struct sockaddr_in bcast; s=socket(AF_INET, SOCK_RAW, IPPROTO_UDP); bBroadcast...
int main(int argc, char *argv[])
{
int s，iSend;
bool bBroadcast;
char *sMsg="This is a test";
struct sockaddr_in bcast;
s=socket(AF_INET, SOCK_RAW, IPPROTO_UDP);
bBroadcast=true;
setsockopt(s,SOL_SOCKET,SO_BROADCAST,(char *)&bBroadcast,sizeof(bool));
bcast.sin_family=AF_INET;
bcast.sin_addr.s_addr=0xffffffff;
bcast.sin_port=htons(5150);
iSend=sendto(s,sMsg,strlen(sMsg),0,(struct sockaddr *)&bcast,sizeof(bcast));
}
为什么iSend总是等于－1？怎么发送广播包啊？ 请各位老大帮忙啊！！
{
int s，iSend;
bool bBroadcast;
char *sMsg="This is a test";
struct sockaddr_in bcast;
s=socket(AF_INET, SOCK_RAW, IPPROTO_UDP);
bBroadcast=true;
setsockopt(s,SOL_SOCKET,SO_BROADCAST,(char *)&bBroadcast,sizeof(bool));
bcast.sin_family=AF_INET;
bcast.sin_addr.s_addr=0xffffffff;
bcast.sin_port=htons(5150);
iSend=sendto(s,sMsg,strlen(sMsg),0,(struct sockaddr *)&bcast,sizeof(bcast));
}
为什么iSend总是等于－1？怎么发送广播包啊？ 请各位老大帮忙啊！！
|
我改了一下，你自己看吧。
#include
#include
#include
#include
int main(int argc, char *argv[])
{
int s,iSend;
int bBroadcast;
char *sMsg="This is a test";
struct sockaddr_in bcast;
s=socket(AF_INET, SOCK_DGRAM, 0);
bBroadcast=1;
setsockopt(s,SOL_SOCKET,SO_BROADCAST,(char *)&bBroadcast,sizeof(bBroadca
st));
bcast.sin_family=AF_INET;
bcast.sin_addr.s_addr=0xffffffff;
bcast.sin_port=htons(5150);
iSend=sendto(s,sMsg,strlen(sMsg),0,(struct sockaddr *)&bcast,sizeof(bcast));
printf("send:%dn",iSend);
}
#include
#include
#include
#include
int main(int argc, char *argv[])
{
int s,iSend;
int bBroadcast;
char *sMsg="This is a test";
struct sockaddr_in bcast;
s=socket(AF_INET, SOCK_DGRAM, 0);
bBroadcast=1;
setsockopt(s,SOL_SOCKET,SO_BROADCAST,(char *)&bBroadcast,sizeof(bBroadca
st));
bcast.sin_family=AF_INET;
bcast.sin_addr.s_addr=0xffffffff;
bcast.sin_port=htons(5150);
iSend=sendto(s,sMsg,strlen(sMsg),0,(struct sockaddr *)&bcast,sizeof(bcast));
printf("send:%dn",iSend);
}
您可能感兴趣的文章:
本站(WWW.)旨在分享和传播互联网科技相关的资讯和技术，将尽最大努力为读者提供更好的信息聚合和浏览方式。
本站(WWW.)站内文章除注明原创外，均为转载、整理或搜集自网络。欢迎任何形式的转载，转载请注明出处。
本站(WWW.)站内文章除注明原创外，均为转载、整理或搜集自网络。欢迎任何形式的转载，转载请注明出处。