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-rw-r--r--Source/charon/encoding/payloads/cp_payload.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/Source/charon/encoding/payloads/cp_payload.c b/Source/charon/encoding/payloads/cp_payload.c
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+++ b/Source/charon/encoding/payloads/cp_payload.c
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+/**
+ * @file cp_payload.c
+ *
+ * @brief Implementation of cp_payload_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * 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.
+ */
+
+/* offsetof macro */
+#include <stddef.h>
+
+#include "cp_payload.h"
+
+#include <encoding/payloads/encodings.h>
+#include <utils/allocator.h>
+#include <utils/linked_list.h>
+
+
+/**
+ * String mappings for config_type_t.
+ */
+mapping_t config_type_m[] = {
+{CFG_REQUEST, "CFG_REQUEST"},
+{CFG_REPLY, "CFG_REPLY"},
+{CFG_SET, "CFG_SET"},
+{CFG_ACK, "CFG_ACK"},
+{MAPPING_END, NULL}
+};
+
+
+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;
+
+ /**
+ * Configuration Attributes in this payload are stored in a linked_list_t.
+ */
+ linked_list_t * attributes;
+
+ /**
+ * Config Type.
+ */
+ u_int8_t config_type;
+
+ /**
+ * @brief Computes the length of this payload.
+ *
+ * @param this calling private_cp_payload_t object
+ */
+ void (*compute_length) (private_cp_payload_t *this);
+};
+
+/**
+ * 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, config_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;
+ iterator_t *iterator;
+
+ if (this->critical)
+ {
+ /* critical bit set! */
+ return FAILED;
+ }
+
+ iterator = this->attributes->create_iterator(this->attributes,TRUE);
+
+ while(iterator->has_next(iterator))
+ {
+ configuration_attribute_t *attribute;
+ iterator->current(iterator,(void **)&attribute);
+ status = attribute->payload_interface.verify(&(attribute->payload_interface));
+ if (status != SUCCESS)
+ {
+ break;
+ }
+ }
+
+ iterator->destroy(iterator);
+ 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;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_cp_payload_t *this)
+{
+ this->compute_length(this);
+ return this->payload_length;
+}
+
+/**
+ * Implementation of cp_payload_t.create_configuration_attribute_iterator.
+ */
+static iterator_t *create_configuration_attribute_iterator (private_cp_payload_t *this,bool forward)
+{
+ return this->attributes->create_iterator(this->attributes,forward);
+}
+
+/**
+ * Implementation of cp_payload_t.add_proposal_substructure.
+ */
+static void add_configuration_attribute (private_cp_payload_t *this,configuration_attribute_t *attribute)
+{
+ this->attributes->insert_last(this->attributes,(void *) attribute);
+ this->compute_length(this);
+}
+
+/**
+ * Implementation of cp_payload_t.set_config_type.
+ */
+static void set_config_type (private_cp_payload_t *this,config_type_t config_type)
+{
+ this->config_type = config_type;
+}
+
+/**
+ * Implementation of cp_payload_t.get_config_type.
+ */
+static config_type_t get_config_type (private_cp_payload_t *this)
+{
+ return this->config_type;
+}
+
+/**
+ * Implementation of private_cp_payload_t.compute_length.
+ */
+static void compute_length (private_cp_payload_t *this)
+{
+ iterator_t *iterator;
+ size_t length = CP_PAYLOAD_HEADER_LENGTH;
+ iterator = this->attributes->create_iterator(this->attributes,TRUE);
+ while (iterator->has_next(iterator))
+ {
+ payload_t *current_attribute;
+ iterator->current(iterator,(void **) &current_attribute);
+ length += current_attribute->get_length(current_attribute);
+ }
+ iterator->destroy(iterator);
+
+ this->payload_length = length;
+}
+
+/**
+ * Implementation of payload_t.destroy and cp_payload_t.destroy.
+ */
+static status_t destroy(private_cp_payload_t *this)
+{
+ /* all attributes are getting destroyed */
+ while (this->attributes->get_count(this->attributes) > 0)
+ {
+ configuration_attribute_t *current_attribute;
+ this->attributes->remove_last(this->attributes,(void **)&current_attribute);
+ current_attribute->destroy(current_attribute);
+ }
+ this->attributes->destroy(this->attributes);
+
+ allocator_free(this);
+
+ return SUCCESS;
+}
+
+/*
+ * Described in header.
+ */
+cp_payload_t *cp_payload_create()
+{
+ private_cp_payload_t *this = allocator_alloc_thing(private_cp_payload_t);
+
+ /* public interface */
+ 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;
+
+ /* public functions */
+ this->public.create_configuration_attribute_iterator = (iterator_t* (*) (cp_payload_t *,bool)) create_configuration_attribute_iterator;
+ this->public.add_configuration_attribute = (void (*) (cp_payload_t *,configuration_attribute_t *)) add_configuration_attribute;
+ this->public.set_config_type = (void (*) (cp_payload_t *, config_type_t)) set_config_type;
+ this->public.get_config_type = (config_type_t (*) (cp_payload_t *)) get_config_type;
+ this->public.destroy = (void (*) (cp_payload_t *)) destroy;
+
+
+ /* private functions */
+ this->compute_length = compute_length;
+
+ /* 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();
+ return (&(this->public));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-18 14:55:32 +0000