/* read, close */
#include <unistd.h>
+/* open */
+#include <sys/stat.h>
+#include <fcntl.h>
+
int main(int argc, char *argv[]) {
- int send_fd;
+ int send_fd,broadcast_on;
struct sockaddr_in local_addr, remote_addr;
- socklen_t remote_addr_len;
- int send_bytes;
+ socklen_t remote_addr_len,optlen;
+ int send_bytes, read_bytes;
+ FILE *cmd_fd;
- if(argc!=3) {
- printf("usage: %s <target-ip/broadcast-addr> <port>\n",argv[0]);
+ if(argc!=4) {
+ printf("usage: %s \"cmd command\" <target-ip/broadcast-addr> <port>\n",argv[0]);
exit(1);
}
printf("can't open socket.\n");
exit(1);
}
+
+ 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;
- local_addr.sin_port=htons(atoi(argv[2]));
+ local_addr.sin_port=htons(atoi(argv[3]));
local_addr.sin_addr.s_addr=htonl(INADDR_ANY);
if(bind(send_fd,(struct sockaddr *)&local_addr,sizeof(local_addr))==-1) {
- printf("unable to bind on port %d.\n",atoi(argv[1]));
+ printf("unable to bind on port %d.\n",atoi(argv[3]));
perror("bind");
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_port=htons(atoi(argv[3]));
+ remote_addr.sin_addr.s_addr=inet_addr(argv[2]);
+
+ if((cmd_fd=popen(argv[1],"w"))<0) {
+ printf("unable to open file descriptor for %s.\n",argv[1]);
+ exit(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,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);