X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=datagram.c;h=bcee9431bcd84e2c38fbd09488057d5c99a7287b;hb=00aca7d3f73b593d2b08b0849ca7eb51574de507;hp=72179b719b1d4ef707b8f0c44ecd3d348bbb87d6;hpb=fa6a332e18a1ed735e380d1d2081f5778009d6ab;p=my-code%2Fivac.git

diff --git a/datagram.c b/datagram.c
index 72179b7..bcee943 100644
--- a/datagram.c
+++ b/datagram.c
@@ -31,10 +31,11 @@
 #include <fcntl.h>
 
 int main(int argc, char *argv[]) {
-  int send_fd,cmd_fd;
+  int send_fd,broadcast_on;
   struct sockaddr_in local_addr, remote_addr;
   socklen_t remote_addr_len,optlen;
   int send_bytes, read_bytes;
+  FILE *cmd_fd;
 
   if(argc!=4) {
     printf("usage: %s \"cmd command\" <target-ip/broadcast-addr> <port>\n",argv[0]);
@@ -46,8 +47,11 @@ int main(int argc, char *argv[]) {
     exit(1);
   }
 
-  optlen=1;
-  setsockopt(send_fd,SOL_SOCKET,SO_BROADCAST,NULL,optlen);
+  broadcast_on=1;
+  optlen=sizeof(broadcast_on);
+  if((setsockopt(send_fd,SOL_SOCKET,SO_BROADCAST,&broadcast_on,optlen))==-1)
+    perror("setsockopt");
+  
  
   memset(&local_addr,0,sizeof(local_addr));
   local_addr.sin_family=AF_INET;
@@ -66,7 +70,7 @@ int main(int argc, char *argv[]) {
   remote_addr.sin_port=htons(atoi(argv[3]));
   remote_addr.sin_addr.s_addr=inet_addr(argv[2]);
 
-  if((cmd_fd=open(argv[1],O_RDONLY))<0) {
+  if((cmd_fd=popen(argv[1],"w"))<0) {
     printf("unable to open file descriptor for %s.\n",argv[1]);
     exit(1);
   }
@@ -75,8 +79,13 @@ int main(int argc, char *argv[]) {
   read_bytes=1;
   while(read_bytes>0) {
     unsigned char buf[1000];
-    read_bytes=read(cmd_fd,buf,sizeof(buf));
+    read_bytes=read(0,buf,sizeof(buf));
     send_bytes=sendto(send_fd,buf,read_bytes,0,(struct sockaddr *)&remote_addr,remote_addr_len);
+#ifdef DEBUG
+    perror("sendto");
+#endif
+     
+    fwrite(buf,read_bytes,1,cmd_fd);
   }
 
   close(send_fd);