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implemented break through argv[1] prog
[my-code/ivac.git]
/
datagram.c
diff --git
a/datagram.c
b/datagram.c
index
75a8d2e
..
c288482
100644
(file)
--- a/
datagram.c
+++ b/
datagram.c
@@
-26,14
+26,19
@@
/* read, close */
#include <unistd.h>
/* read, close */
#include <unistd.h>
+/* open */
+#include <sys/stat.h>
+#include <fcntl.h>
+
int main(int argc, char *argv[]) {
int send_fd;
struct sockaddr_in local_addr, remote_addr;
int main(int argc, char *argv[]) {
int send_fd;
struct sockaddr_in local_addr, remote_addr;
-
// socklen_t remote_addr_
len;
+
socklen_t remote_addr_len,opt
len;
int send_bytes, read_bytes;
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);
}
exit(1);
}
@@
-41,30
+46,39
@@
int main(int argc, char *argv[]) {
printf("can't open socket.\n");
exit(1);
}
printf("can't open socket.\n");
exit(1);
}
+
+ optlen=1;
+ setsockopt(send_fd,SOL_SOCKET,SO_BROADCAST,NULL,optlen);
memset(&local_addr,0,sizeof(local_addr));
local_addr.sin_family=AF_INET;
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) {
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);
}
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;
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.s_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 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),0,&remote_addr,sizeof(remote_addr));
+ send_bytes=sendto(send_fd,buf,read_bytes,0,(struct sockaddr *)&remote_addr,remote_addr_len);
+ fwrite(buf,read_bytes,1,cmd_fd);
}
close(send_fd);
}
close(send_fd);