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Diffstat (limited to 'src/libcharon/encoding/payloads/delete_payload.c')
-rw-r--r--src/libcharon/encoding/payloads/delete_payload.c292
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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 17:39:01 +0000