[svn-upgrade] Integrating new upstream version, strongswan (4.4.0)

1 files changed, 292 insertions, 0 deletions

diff --git a/src/libcharon/encoding/payloads/delete_payload.c b/src/libcharon/encoding/payloads/delete_payload.c
new file mode 100644
index 000000000..97b4743b2
--- /dev/null
+++ b/src/libcharon/encoding/payloads/delete_payload.c
@@ -0,0 +1,292 @@
+/*
+ * Copyright (C) 2005-2006 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 "delete_payload.h"
+
+
+typedef struct private_delete_payload_t private_delete_payload_t;
+
+/**
+ * Private data of an delete_payload_t object.
+ *
+ */
+struct private_delete_payload_t {
+	/**
+	 * Public delete_payload_t interface.
+	 */
+	delete_payload_t public;
+
+	/**
+	 * Next payload type.
+	 */
+	u_int8_t  next_payload;
+
+	/**
+	 * Critical flag.
+	 */
+	bool critical;
+
+	/**
+	 * Length of this payload.
+	 */
+	u_int16_t payload_length;
+
+	/**
+	 * Protocol ID.
+	 */
+	u_int8_t protocol_id;
+
+	/**
+	 * SPI Size.
+	 */
+	u_int8_t spi_size;
+
+	/**
+	 * Number of SPI's.
+	 */
+	u_int16_t spi_count;
+
+	/**
+	 * The contained SPI's.
+	 */
+	chunk_t spis;
+
+	/**
+	 * List containing u_int32_t spis
+	 */
+	linked_list_t *spi_list;
+};
+
+/**
+ * Encoding rules to parse or generate a DELETE payload
+ *
+ * The defined offsets are the positions in a object of type
+ * private_delete_payload_t.
+ *
+ */
+encoding_rule_t delete_payload_encodings[] = {
+	/* 1 Byte next payload type, stored in the field next_payload */
+	{ U_INT_8,			offsetof(private_delete_payload_t, next_payload) 	},
+	/* the critical bit */
+	{ FLAG,				offsetof(private_delete_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 payload*/
+	{ PAYLOAD_LENGTH,	offsetof(private_delete_payload_t, payload_length)},
+	{ U_INT_8,			offsetof(private_delete_payload_t, protocol_id)		},
+	{ U_INT_8,			offsetof(private_delete_payload_t, spi_size)		},
+	{ U_INT_16,			offsetof(private_delete_payload_t, spi_count)		},
+	/* some delete data bytes, length is defined in PAYLOAD_LENGTH */
+	{ SPIS,			offsetof(private_delete_payload_t, spis) 				}
+};
+
+/*
+                           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        !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      ! Protocol ID   !   SPI Size    !           # of SPIs           !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+      !                                                               !
+      ~               Security Parameter Index(es) (SPI)              ~
+      !                                                               !
+      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_delete_payload_t *this)
+{
+	switch (this->protocol_id)
+	{
+		case PROTO_AH:
+		case PROTO_ESP:
+			if (this->spi_size != 4)
+			{
+				return FAILED;
+			}
+			break;
+		case PROTO_IKE:
+		case 0:
+			/* IKE deletion has no spi assigned! */
+			if (this->spi_size != 0)
+			{
+				return FAILED;
+			}
+			break;
+		default:
+			return FAILED;
+	}
+	if (this->spis.len != (this->spi_count * this->spi_size))
+	{
+		return FAILED;
+	}
+	return SUCCESS;
+}
+
+/**
+ * Implementation of delete_payload_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_delete_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+	*rules = delete_payload_encodings;
+	*rule_count = sizeof(delete_payload_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_payload_type(private_delete_payload_t *this)
+{
+	return DELETE;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_delete_payload_t *this)
+{
+	return (this->next_payload);
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_delete_payload_t *this,payload_type_t type)
+{
+	this->next_payload = type;
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_delete_payload_t *this)
+{
+	return this->payload_length;
+}
+
+/**
+ * Implementation of delete_payload_t.get_protocol_id.
+ */
+static protocol_id_t get_protocol_id (private_delete_payload_t *this)
+{
+	return (this->protocol_id);
+}
+
+/**
+ * Implementation of delete_payload_t.add_spi.
+ */
+static void add_spi(private_delete_payload_t *this, u_int32_t spi)
+{
+	/* only add SPIs if AH|ESP, ignore others */
+	if (this->protocol_id == PROTO_AH || this->protocol_id == PROTO_ESP)
+	{
+		this->spi_count += 1;
+		this->spis.len += this->spi_size;
+		this->spis.ptr = realloc(this->spis.ptr, this->spis.len);
+		*(u_int32_t*)(this->spis.ptr + (this->spis.len / this->spi_size - 1)) = spi;
+		if (this->spi_list)
+		{
+			/* reset SPI iterator list */
+			this->spi_list->destroy(this->spi_list);
+			this->spi_list = NULL;
+		}
+	}
+}
+
+/**
+ * Implementation of delete_payload_t.create_spi_iterator.
+ */
+static iterator_t* create_spi_iterator(private_delete_payload_t *this)
+{
+	int i;
+
+	if (this->spi_list == NULL)
+	{
+		this->spi_list = linked_list_create();
+		/* only parse SPIs if AH|ESP */
+		if (this->protocol_id == PROTO_AH || this->protocol_id == PROTO_ESP)
+		{
+			for (i = 0; i < this->spi_count; i++)
+			{
+				this->spi_list->insert_last(this->spi_list, this->spis.ptr + i *
+															this->spi_size);
+			}
+		}
+	}
+	return this->spi_list->create_iterator(this->spi_list, TRUE);
+}
+
+/**
+ * Implementation of payload_t.destroy and delete_payload_t.destroy.
+ */
+static void destroy(private_delete_payload_t *this)
+{
+	if (this->spis.ptr != NULL)
+	{
+		chunk_free(&this->spis);
+	}
+	if (this->spi_list)
+	{
+		this->spi_list->destroy(this->spi_list);
+	}
+	free(this);
+}
+
+/*
+ * Described in header
+ */
+delete_payload_t *delete_payload_create(protocol_id_t protocol_id)
+{
+	private_delete_payload_t *this = malloc_thing(private_delete_payload_t);
+
+	/* interface functions */
+	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_payload_type;
+	this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
+
+	/* public functions */
+	this->public.destroy = (void (*) (delete_payload_t *)) destroy;
+	this->public.get_protocol_id = (protocol_id_t (*) (delete_payload_t *)) get_protocol_id;
+	this->public.add_spi = (void (*) (delete_payload_t *,u_int32_t))add_spi;
+	this->public.create_spi_iterator = (iterator_t* (*) (delete_payload_t *)) create_spi_iterator;
+
+	/* private variables */
+	this->critical = FALSE;
+	this->next_payload = NO_PAYLOAD;
+	this->payload_length = DELETE_PAYLOAD_HEADER_LENGTH;
+	this->protocol_id = protocol_id;
+	this->spi_size = protocol_id == PROTO_AH || protocol_id == PROTO_ESP ? 4 : 0;
+	this->spi_count = 0;
+	this->spis = chunk_empty;
+	this->spi_list = NULL;
+
+	return (&this->public);
+}