diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/Makefile | 7 | ||||
| -rw-r--r-- | tools/ncb.c | 36 |
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; +} |