1 files changed, 124 insertions, 0 deletions
diff --git a/lib/network.c b/lib/network.c
new file mode 100644
index 0000000..b60ad9a
--- /dev/null
+++ b/lib/network.c
@@ -0,0 +1,124 @@
+/*
+ * Network library.
+ * Copyright (C) 1997 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+#include "log.h"
+#include "network.h"
+#include "lib_errors.h"
+
+/* Read nbytes from fd and store into ptr. */
+int readn(int fd, uint8_t *ptr, int nbytes)
+{
+	int nleft;
+	int nread;
+
+	nleft = nbytes;
+
+	while (nleft > 0) {
+		nread = read(fd, ptr, nleft);
+
+		if (nread < 0)
+			return (nread);
+		else if (nread == 0)
+			break;
+
+		nleft -= nread;
+		ptr += nread;
+	}
+
+	return nbytes - nleft;
+}
+
+/* Write nbytes from ptr to fd. */
+int writen(int fd, const uint8_t *ptr, int nbytes)
+{
+	int nleft;
+	int nwritten;
+
+	nleft = nbytes;
+
+	while (nleft > 0) {
+		nwritten = write(fd, ptr, nleft);
+
+		if (nwritten < 0) {
+			if (!ERRNO_IO_RETRY(errno))
+				return nwritten;
+		}
+		if (nwritten == 0)
+			return (nwritten);
+
+		nleft -= nwritten;
+		ptr += nwritten;
+	}
+	return nbytes - nleft;
+}
+
+int set_nonblocking(int fd)
+{
+	int flags;
+
+	/* According to the Single UNIX Spec, the return value for F_GETFL
+	   should
+	   never be negative. */
+	flags = fcntl(fd, F_GETFL);
+	if (flags < 0) {
+		flog_err(EC_LIB_SYSTEM_CALL,
+			 "fcntl(F_GETFL) failed for fd %d: %s", fd,
+			 safe_strerror(errno));
+		return -1;
+	}
+	if (fcntl(fd, F_SETFL, (flags | O_NONBLOCK)) < 0) {
+		flog_err(EC_LIB_SYSTEM_CALL,
+			 "fcntl failed setting fd %d non-blocking: %s", fd,
+			 safe_strerror(errno));
+		return -1;
+	}
+	return 0;
+}
+
+int set_cloexec(int fd)
+{
+	int flags;
+	flags = fcntl(fd, F_GETFD, 0);
+	if (flags == -1)
+		return -1;
+
+	flags |= FD_CLOEXEC;
+	if (fcntl(fd, F_SETFD, flags) == -1)
+		return -1;
+	return 0;
+}
+
+float htonf(float host)
+{
+	uint32_t lu1, lu2;
+	float convert;
+
+	memcpy(&lu1, &host, sizeof(uint32_t));
+	lu2 = htonl(lu1);
+	memcpy(&convert, &lu2, sizeof(uint32_t));
+	return convert;
+}
+
+float ntohf(float net)
+{
+	return htonf(net);
+}