summaryrefslogtreecommitdiff
path: root/src/libcharon/encoding/payloads/cp_payload.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libcharon/encoding/payloads/cp_payload.c')
-rw-r--r--src/libcharon/encoding/payloads/cp_payload.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/src/libcharon/encoding/payloads/cp_payload.c b/src/libcharon/encoding/payloads/cp_payload.c
new file mode 100644
index 000000000..f0a26eee2
--- /dev/null
+++ b/src/libcharon/encoding/payloads/cp_payload.c
@@ -0,0 +1,273 @@
+/*
+ * Copyright (C) 2005-2009 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+#include <stddef.h>
+
+#include "cp_payload.h"
+
+#include <encoding/payloads/encodings.h>
+#include <utils/linked_list.h>
+
+ENUM(config_type_names, CFG_REQUEST, CFG_ACK,
+ "CFG_REQUEST",
+ "CFG_REPLY",
+ "CFG_SET",
+ "CFG_ACK",
+);
+
+typedef struct private_cp_payload_t private_cp_payload_t;
+
+/**
+ * Private data of an cp_payload_t object.
+ *
+ */
+struct private_cp_payload_t {
+ /**
+ * Public cp_payload_t interface.
+ */
+ cp_payload_t public;
+
+ /**
+ * Next payload type.
+ */
+ u_int8_t next_payload;
+
+ /**
+ * Critical flag.
+ */
+ bool critical;
+
+ /**
+ * Length of this payload.
+ */
+ u_int16_t payload_length;
+
+ /**
+ * List of attributes, as configuration_attribute_t
+ */
+ linked_list_t *attributes;
+
+ /**
+ * Config Type.
+ */
+ u_int8_t type;
+};
+
+/**
+ * Encoding rules to parse or generate a IKEv2-CP Payload
+ *
+ * The defined offsets are the positions in a object of type
+ * private_cp_payload_t.
+ *
+ */
+encoding_rule_t cp_payload_encodings[] = {
+ /* 1 Byte next payload type, stored in the field next_payload */
+ { U_INT_8, offsetof(private_cp_payload_t, next_payload) },
+ /* the critical bit */
+ { FLAG, offsetof(private_cp_payload_t, critical) },
+ /* 7 Bit reserved bits, nowhere stored */
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ { RESERVED_BIT, 0 },
+ /* Length of the whole CP payload*/
+ { PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
+ /* Proposals are stored in a proposal substructure,
+ offset points to a linked_list_t pointer */
+ { U_INT_8, offsetof(private_cp_payload_t, type) },
+ { RESERVED_BYTE,0 },
+ { RESERVED_BYTE,0 },
+ { RESERVED_BYTE,0 },
+ { CONFIGURATION_ATTRIBUTES, offsetof(private_cp_payload_t, attributes) }
+};
+
+/*
+ 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! Next Payload !C! RESERVED ! Payload Length !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! CFG Type ! RESERVED !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! !
+ ~ Configuration Attributes ~
+ ! !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_cp_payload_t *this)
+{
+ status_t status = SUCCESS;
+ enumerator_t *enumerator;
+ payload_t *attribute;
+
+ enumerator = this->attributes->create_enumerator(this->attributes);
+ while (enumerator->enumerate(enumerator, &attribute))
+ {
+ status = attribute->verify(attribute);
+ if (status != SUCCESS)
+ {
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+ return status;
+}
+
+/**
+ * Implementation of payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_cp_payload_t *this,
+ encoding_rule_t **rules, size_t *rule_count)
+{
+ *rules = cp_payload_encodings;
+ *rule_count = sizeof(cp_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_type(private_cp_payload_t *this)
+{
+ return CONFIGURATION;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_cp_payload_t *this)
+{
+ return this->next_payload;
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_cp_payload_t *this,payload_type_t type)
+{
+ this->next_payload = type;
+}
+
+/**
+ * recompute the length of the payload.
+ */
+static void compute_length(private_cp_payload_t *this)
+{
+ enumerator_t *enumerator;
+ payload_t *attribute;
+
+ this->payload_length = CP_PAYLOAD_HEADER_LENGTH;
+
+ enumerator = this->attributes->create_enumerator(this->attributes);
+ while (enumerator->enumerate(enumerator, &attribute))
+ {
+ this->payload_length += attribute->get_length(attribute);
+ }
+ enumerator->destroy(enumerator);
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_cp_payload_t *this)
+{
+ return this->payload_length;
+}
+
+/**
+ * Implementation of cp_payload_t.create_attribute_enumerator.
+ */
+static enumerator_t *create_attribute_enumerator(private_cp_payload_t *this)
+{
+ return this->attributes->create_enumerator(this->attributes);
+}
+
+/**
+ * Implementation of cp_payload_t.add_attribute.
+ */
+static void add_attribute(private_cp_payload_t *this,
+ configuration_attribute_t *attribute)
+{
+ this->attributes->insert_last(this->attributes, attribute);
+ compute_length(this);
+}
+
+/**
+ * Implementation of cp_payload_t.get_type.
+ */
+static config_type_t get_config_type(private_cp_payload_t *this)
+{
+ return this->type;
+}
+
+/**
+ * Implementation of payload_t.destroy and cp_payload_t.destroy.
+ */
+static void destroy(private_cp_payload_t *this)
+{
+ this->attributes->destroy_offset(this->attributes,
+ offsetof(configuration_attribute_t, destroy));
+ free(this);
+}
+
+/*
+ * Described in header.
+ */
+cp_payload_t *cp_payload_create()
+{
+ private_cp_payload_t *this = malloc_thing(private_cp_payload_t);
+
+ this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
+ this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
+ this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
+ this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
+ this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
+ this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_type;
+ this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
+
+ this->public.create_attribute_enumerator = (enumerator_t*(*)(cp_payload_t *))create_attribute_enumerator;
+ this->public.add_attribute = (void (*) (cp_payload_t *,configuration_attribute_t*))add_attribute;
+ this->public.get_type = (config_type_t (*) (cp_payload_t *))get_config_type;
+ this->public.destroy = (void (*)(cp_payload_t *))destroy;
+
+ /* set default values of the fields */
+ this->critical = FALSE;
+ this->next_payload = NO_PAYLOAD;
+ this->payload_length = CP_PAYLOAD_HEADER_LENGTH;
+ this->attributes = linked_list_create();
+ this->type = CFG_REQUEST;
+
+ return &this->public;
+}
+
+/*
+ * Described in header.
+ */
+cp_payload_t *cp_payload_create_type(config_type_t type)
+{
+ private_cp_payload_t *this = (private_cp_payload_t*)cp_payload_create();
+
+ this->type = type;
+
+ return &this->public;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-18 01:56:34 +0000