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-rw-r--r--tools/Makefile7
-rw-r--r--tools/ncb.c36
2 files changed, 43 insertions, 0 deletions
diff --git a/tools/Makefile b/tools/Makefile
index 0576a3f..9115430 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -131,6 +131,10 @@ mkimage$(SFX): mkimage.o crc32.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
+ncb$(SFX): ncb.o
+ $(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
+ $(STRIP) $@
+
gen_eth_addr$(SFX): gen_eth_addr.o
$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
$(STRIP) $@
@@ -156,6 +160,9 @@ crc32.o: crc32.c
mkimage.o: mkimage.c
$(CC) -g $(CFLAGS) -c $<
+ncb.o: ncb.c
+ $(CC) -g $(CFLAGS) -c $<
+
gen_eth_addr.o: gen_eth_addr.c
$(CC) -g $(CFLAGS) -c $<
diff --git a/tools/ncb.c b/tools/ncb.c
new file mode 100644
index 0000000..74deebb
--- /dev/null
+++ b/tools/ncb.c
@@ -0,0 +1,36 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <linux/in.h>
+
+int main (int argc, char *argv[])
+{
+ int s, len, o, port = 6666;
+ char buf[512];
+ struct sockaddr_in addr;
+ int addr_len = sizeof addr;
+
+ if (argc > 1)
+ port = atoi (argv[1]);
+
+ s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+ o = 1;
+ len = 4;
+ setsockopt (3, SOL_SOCKET, SO_REUSEADDR, &o, len);
+
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons (port);
+ addr.sin_addr.s_addr = INADDR_ANY; /* receive broadcasts */
+
+ bind (s, (struct sockaddr *) &addr, sizeof addr);
+
+ for (;;) {
+ len = recvfrom (s, buf, sizeof buf, 0, (struct sockaddr *) &addr, &addr_len);
+ if (len < 0)
+ break;
+ write (1, buf, len);
+ }
+
+ return 0;
+}