Boilerplate functions for DHCPv6 (hey it's a start)

diff --git a/src/protocols/dhcpv6/all.mk b/src/protocols/dhcpv6/all.mk
new file mode 100644 (file)
index 0000000..bb11f1a
--- /dev/null
+++ b/src/protocols/dhcpv6/all.mk
@@ -0,0 +1,11 @@
+#
+# Makefile
+#
+# Version:      $Id$
+#
+TARGET         := libfreeradius-dhcpv6.a
+
+SOURCES                := decode.c \
+                  encode.c
+
+TGT_PREREQS    := libfreeradius-util.a

diff --git a/src/protocols/dhcpv6/decode.c b/src/protocols/dhcpv6/decode.c
new file mode 100644 (file)
index 0000000..4ea467d
--- /dev/null
+++ b/src/protocols/dhcpv6/decode.c
@@ -0,0 +1,36 @@
+/*
+ *   This library is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU Lesser General Public
+ *   License as published by the Free Software Foundation; either
+ *   version 2.1 of the License, or (at your option) any later version.
+ *
+ *   This library 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
+ *   Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/**
+ * $Id$
+ *
+ * @file protocols/dhcpv6/decode.c
+ * @brief Functions to decode DHCP options.
+ *
+ * @author Arran Cudbard-Bell <a.cudbardb@freeradius.org>
+ *
+ * @copyright 2018 The FreeRADIUS server project
+ * @copyright 2018 NetworkRADIUS SARL <info@networkradius.com>
+ */
+#include <stdint.h>
+#include <stddef.h>
+#include <talloc.h>
+#include <freeradius-devel/pair.h>
+#include <freeradius-devel/types.h>
+#include <freeradius-devel/proto.h>
+#include <freeradius-devel/io/test_point.h>
+
+#include "dhcpv6.h"

diff --git a/src/protocols/dhcpv6/dhcpv6.h b/src/protocols/dhcpv6/dhcpv6.h
new file mode 100644 (file)
index 0000000..0429f3d
--- /dev/null
+++ b/src/protocols/dhcpv6/dhcpv6.h
@@ -0,0 +1,35 @@
+/*
+ *  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 2 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, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+#ifndef _FR_DHCPV6_H
+#define _FR_DHCPV6_H
+/**
+ * $Id$
+ *
+ * @file protocols/dhcpv6/dhcpv6.h
+ * @brief Implementation of the DHCPv6 protocol.
+ *
+ * @author Arran Cudbard-Bell <a.cudbardb@freeradius.org>
+ *
+ * @copyright 2018 The FreeRADIUS server project
+ * @copyright 2018 NetworkRADIUS SARL <info@networkradius.com>
+ */
+RCSIDH(dhcpv6_h, "$Id$")
+
+ssize_t                fr_dhcpv6_encode_option(uint8_t *out, size_t outlen, fr_cursor_t *cursor, void *encoder_ctx);
+
+ssize_t                fr_dhcpv6_decode_option(TALLOC_CTX *ctx, vp_cursor_t *cursor,
+                                       uint8_t const *data, size_t data_len, void *decoder_ctx);
+#endif

diff --git a/src/protocols/dhcpv6/encode.c b/src/protocols/dhcpv6/encode.c
new file mode 100644 (file)
index 0000000..9538a45
--- /dev/null
+++ b/src/protocols/dhcpv6/encode.c
@@ -0,0 +1,101 @@
+/*
+ *   This library is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU Lesser General Public
+ *   License as published by the Free Software Foundation; either
+ *   version 2.1 of the License, or (at your option) any later version.
+ *
+ *   This library 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
+ *   Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/**
+ * $Id$
+ *
+ * @file protocols/dhcpv6/encode.c
+ * @brief Functions to encode DHCP options.
+ *
+ * @author Arran Cudbard-Bell <a.cudbardb@freeradius.org>
+ *
+ * @copyright 2018 The FreeRADIUS server project
+ * @copyright 2018 NetworkRADIUS SARL <info@networkradius.com>
+ */
+#include <stdint.h>
+#include <stddef.h>
+#include <talloc.h>
+#include <freeradius-devel/pair.h>
+#include <freeradius-devel/types.h>
+#include <freeradius-devel/proto.h>
+#include <freeradius-devel/io/test_point.h>
+
+#include "dhcpv6.h"
+
+static ssize_t encode_tlv_hdr(UNUSED uint8_t *out, UNUSED size_t outlen,
+                             UNUSED fr_dict_attr_t const *tlv_stack[], UNUSED unsigned int depth, UNUSED fr_cursor_t *cursor)
+{
+       return 0;
+}
+
+static ssize_t encode_rfc_hdr(UNUSED uint8_t *out, UNUSED size_t outlen,
+                             UNUSED fr_dict_attr_t const *tlv_stack[], UNUSED unsigned int depth, UNUSED fr_cursor_t *cursor)
+{
+       return 0;
+}
+
+/** Encode a DHCPv6 option and any sub-options.
+ *
+ * @param[out] out Where to write encoded DHCP attributes.
+ * @param[in] outlen Length of out buffer.
+ * @param[in] cursor with current VP set to the option to be encoded. Will be advanced to the next option to encode.
+ * @param[in] encoder_ctx containing parameters for the encoder.
+ * @return
+ *     - > 0 length of data written.
+ *     - < 0 error.
+ *     - 0 not valid option for DHCP (skipping).
+ */
+ssize_t fr_dhcpv6_encode_option(uint8_t *out, size_t outlen, fr_cursor_t *cursor, UNUSED void *encoder_ctx)
+{
+       VALUE_PAIR              *vp;
+       unsigned int            depth = 0;
+       fr_dict_attr_t const    *tlv_stack[FR_DICT_MAX_TLV_STACK + 1];
+       ssize_t                 len;
+
+       vp = fr_cursor_current(cursor);
+       if (!vp) return -1;
+
+       if (vp->da->flags.internal) {
+               fr_strerror_printf("Attribute \"%s\" is not a DHCPv6 option", vp->da->name);
+               fr_cursor_next(cursor);
+               return 0;
+       }
+
+       fr_proto_tlv_stack_build(tlv_stack, vp->da);
+
+       depth++;        /* Skip the root attribute */
+       FR_PROTO_STACK_PRINT(tlv_stack, depth);
+
+       /*
+        *      We only have two types of options in DHCPv6
+        */
+       switch (tlv_stack[depth]->type) {
+       case FR_TYPE_TLV:
+               len = encode_tlv_hdr(out, outlen, tlv_stack, depth, cursor);
+               break;
+
+       default:
+               len = encode_rfc_hdr(out, outlen, tlv_stack, depth, cursor);
+               break;
+       }
+
+       if (len < 0) return len;
+
+       FR_PROTO_TRACE("Complete option is %zu byte(s)", len);
+       FR_PROTO_HEX_DUMP(NULL, out, len);
+
+       return len;
+}