Initial commit

1 files changed, 43 insertions, 0 deletions

diff --git a/bind.c b/bind.c
new file mode 100644
index 0000000..8b9cae3
--- /dev/null
+++ b/bind.c
@@ -0,0 +1,43 @@
+#include <sys/socket.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+static void fail(const char *err) {
+	perror(err);
+	exit(1);
+}
+
+int main(int argc, char **argv) {
+	unsigned short int port;
+	int sockfd;
+	struct sockaddr_in addr;
+	struct in_addr sa;
+
+	if (argc < 2) {
+		printf("Usage: %s port\n", argv[0]);
+		return -1;
+	}
+	port = atoi(argv[1]);
+	printf("Port: %hu\n", port);
+
+	sockfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (sockfd < 0) fail("socket");
+
+	memset(&addr, 0, sizeof addr);
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(port);
+	sa.s_addr = htonl(INADDR_LOOPBACK);
+	addr.sin_addr = sa;
+	printf("sockfd = %i\naddr   = %p\nsizeof addr = %zi\n", sockfd,
+		(struct sockaddr *)&addr, sizeof addr);
+	if (bind(sockfd, (struct sockaddr *)&addr, sizeof addr) < 0) fail("bind");
+
+	if (listen(sockfd, 10) < 0) fail("listen");
+
+	if (close(sockfd) < 0) fail("close");
+	printf("Success!\n");
+	return 0;
+}