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--
[my-code/ivac.git]
/
datagram.c
diff --git
a/datagram.c
b/datagram.c
index
72179b7
..
bcee943
100644
(file)
--- a/
datagram.c
+++ b/
datagram.c
@@
-31,10
+31,11
@@
#include <fcntl.h>
int main(int argc, char *argv[]) {
#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;
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]);
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);
}
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;
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]);
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);
}
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=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);
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);
}
close(send_fd);