1 files changed, 120 insertions, 0 deletions
diff --git a/src/common/sockaddr.h b/src/common/sockaddr.h
new file mode 100644
index 0000000..51ba779
--- /dev/null
+++ b/src/common/sockaddr.h
@@ -0,0 +1,120 @@
+/*  Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program 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 3 of the License, or
+    (at your option) any later version.
+
+    This program 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.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*!
+ * \file sockaddr.h
+ *
+ * \author Marek Vavrusa <marek.vavrusa@nic.cz>
+ *
+ * \brief Socket address abstraction layer.
+ *
+ * \addtogroup common_lib
+ * @{
+ */
+
+#ifndef _KNOTD_SOCKADDR_H_
+#define _KNOTD_SOCKADDR_H_
+
+/* BSD IPv6 */
+#ifndef __POSIX_VISIBLE
+#define __POSIX_VISIBLE = 200112
+#endif
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*! \brief Universal socket address. */
+typedef struct sockaddr_t {
+	int family; /*!< Address family. */
+	struct sockaddr* ptr; /*!< Pointer to used sockaddr. */
+	socklen_t len;              /*!< Length of used sockaddr. */
+	union {
+		struct sockaddr_in addr4; /*!< IPv4 sockaddr. */
+#ifndef DISABLE_IPV6
+		struct sockaddr_in6 addr6; /*!< IPv6 sockaddr. */
+#endif
+	};
+} sockaddr_t;
+
+/*! \brief Maximum address length in string format. */
+#ifdef DISABLE_IPV6
+#define SOCKADDR_STRLEN INET_ADDRSTRLEN
+#else
+#define SOCKADDR_STRLEN INET6_ADDRSTRLEN
+#endif
+
+/*!
+ * \brief Initialize address structure.
+ *
+ * Members ptr and len will be initialized to correct address family.
+ *
+ * \param addr Socket address structure.
+ * \param af Requested address family.
+ *
+ * \retval 0 on success.
+ * \retval -1 on unsupported address family (probably INET6).
+ */
+int sockaddr_init(sockaddr_t *addr, int af);
+
+/*!
+ * \brief Update internal pointers according to length.
+ *
+ * \param addr Socket address structure.
+ *
+ * \retval 0 on success.
+ * \retval -1 on invalid size.
+ */
+int sockaddr_update(sockaddr_t *addr);
+
+/*!
+ * \brief Set address and port.
+ *
+ * \param dst Target address structure.
+ * \param family Address family.
+ * \param addr IP address in string format.
+ * \param port Port.
+ *
+ * \retval 0 if addr is not valid address in string format.
+ * \retval positive value in case of success.
+ * \retval -1 on error.
+ * \see inet_pton(3)
+ */
+int sockaddr_set(sockaddr_t *dst, int family, const char* addr, int port);
+
+/*!
+ * \brief Return string representation of socket address.
+ *
+ * \param addr Socket address structure.
+ * \param dst Destination for string representation.
+ * \param size Maximum number of written bytes.
+ *
+ * \retval 0 on success.
+ * \retval -1 on invalid parameters.
+ */
+int sockaddr_tostr(sockaddr_t *addr, char *dst, size_t size);
+
+/*!
+ * \brief Return port number from address.
+ *
+ * \param addr Socket address structure.
+ *
+ * \retval Port number on success.
+ * \retval -1 on errors.
+ */
+int sockaddr_portnum(sockaddr_t *addr);
+
+#endif /* _KNOTD_SOCKADDR_H_ */
+
+/*! @} */