added SO_BROADCAST support

[my-code/ivac.git] / datagram.c

diff --git a/datagram.c b/datagram.c
index a140c32..83c4bc8 100644 (file)
--- a/datagram.c
+++ b/datagram.c
@@ -30,7 +30,7 @@ int main(int argc, char *argv[]) {
   int send_fd;
   struct sockaddr_in local_addr, remote_addr;
   socklen_t remote_addr_len;
-  int send_bytes;
+  int send_bytes, read_bytes;
 
   if(argc!=3) {
     printf("usage: %s <target-ip/broadcast-addr> <port>\n",argv[0]);
@@ -41,6 +41,8 @@ int main(int argc, char *argv[]) {
     printf("can't open socket.\n");
     exit(1);
   }
+
+  // setsockopt(send_fd,SOL_SOCKET,SO_BROADCAST,
  
   memset(&local_addr,0,sizeof(local_addr));
   local_addr.sin_family=AF_INET;
@@ -53,18 +55,18 @@ int main(int argc, char *argv[]) {
     exit(1);
   }
 
-  // remote_addr_len=sizeof(remote_addr); 
+  remote_addr_len=sizeof(remote_addr); 
   memset(&remote_addr,0,sizeof(remote_addr));
   remote_addr.sin_family=AF_INET;
   remote_addr.sin_port=htons(atoi(argv[2]));
-  remote_addr.sin_addr=inet_addr(argv[1]);
+  remote_addr.sin_addr.s_addr=inet_addr(argv[1]);
 
   /* send stuff .... */
   read_bytes=1;
   while(read_bytes>0) {
     unsigned char buf[1000];
     read_bytes=read(0,buf,sizeof(buf));
-    send_bytes=sendto(send_fd,buf,sizeof(buf),&remote_addr,sizeof(remote_addr);
+    send_bytes=sendto(send_fd,buf,sizeof(buf),0,(struct sockaddr *)&remote_addr,remote_addr_len);
   }
 
   close(send_fd);