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-rw-r--r--Source/charon/encoding/payloads/traffic_selector_substructure.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/Source/charon/encoding/payloads/traffic_selector_substructure.c b/Source/charon/encoding/payloads/traffic_selector_substructure.c
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+++ b/Source/charon/encoding/payloads/traffic_selector_substructure.c
@@ -0,0 +1,338 @@
+/**
+ * @file traffic_selector_substructure.c
+ *
+ * @brief Interface of traffic_selector_substructure_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.
+ */
+
+#include "traffic_selector_substructure.h"
+
+#include <encoding/payloads/encodings.h>
+#include <utils/allocator.h>
+#include <utils/linked_list.h>
+
+/**
+ * String mappings for ts_type_t.
+ */
+mapping_t ts_type_m[] = {
+{TS_IPV4_ADDR_RANGE, "TS_IPV4_ADDR_RANGE"},
+{TS_IPV6_ADDR_RANGE, "TS_IPV6_ADDR_RANGE"},
+{MAPPING_END, NULL}
+};
+
+
+typedef struct private_traffic_selector_substructure_t private_traffic_selector_substructure_t;
+
+/**
+ * Private data of an traffic_selector_substructure_t object.
+ *
+ */
+struct private_traffic_selector_substructure_t {
+ /**
+ * Public traffic_selector_substructure_t interface.
+ */
+ traffic_selector_substructure_t public;
+
+ /**
+ * Type of traffic selector.
+ */
+ u_int8_t ts_type;
+
+ /**
+ * IP Protocol ID.
+ */
+ u_int8_t ip_protocol_id;
+
+ /**
+ * Length of this payload.
+ */
+ u_int16_t payload_length;
+
+ /**
+ * Start port number.
+ */
+ u_int16_t start_port;
+
+ /**
+ * End port number.
+ */
+ u_int16_t end_port;
+
+ /**
+ * Starting address.
+ */
+ chunk_t starting_address;
+
+ /**
+ * Ending address.
+ */
+ chunk_t ending_address;
+};
+
+/**
+ * Encoding rules to parse or generate a TS payload
+ *
+ * The defined offsets are the positions in a object of type
+ * private_traffic_selector_substructure_t.
+ *
+ */
+encoding_rule_t traffic_selector_substructure_encodings[] = {
+ /* 1 Byte next ts type*/
+ { TS_TYPE, offsetof(private_traffic_selector_substructure_t, ts_type) },
+ /* 1 Byte IP protocol id*/
+ { U_INT_8, offsetof(private_traffic_selector_substructure_t, ip_protocol_id) },
+ /* Length of the whole payload*/
+ { PAYLOAD_LENGTH, offsetof(private_traffic_selector_substructure_t, payload_length) },
+ /* 2 Byte start port*/
+ { U_INT_16, offsetof(private_traffic_selector_substructure_t, start_port) },
+ /* 2 Byte end port*/
+ { U_INT_16, offsetof(private_traffic_selector_substructure_t, end_port) },
+ /* starting address is either 4 or 16 byte */
+ { ADDRESS, offsetof(private_traffic_selector_substructure_t, starting_address) },
+ /* ending address is either 4 or 16 byte */
+ { ADDRESS, offsetof(private_traffic_selector_substructure_t, ending_address) }
+
+};
+
+/*
+ 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
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! TS Type !IP Protocol ID*| Selector Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Start Port* | End Port* |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! !
+ ~ Starting Address* ~
+ ! !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ ! !
+ ~ Ending Address* ~
+ ! !
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/**
+ * Implementation of payload_t.verify.
+ */
+static status_t verify(private_traffic_selector_substructure_t *this)
+{
+
+ if (this->start_port > this->end_port)
+ {
+ return FAILED;
+ }
+ switch (this->ts_type)
+ {
+ case TS_IPV4_ADDR_RANGE:
+ {
+ if ((this->starting_address.len != 4) ||
+ (this->ending_address.len != 4))
+ {
+ /* ipv4 address must be 4 bytes long */
+ return FAILED;
+ }
+ break;
+ }
+ case TS_IPV6_ADDR_RANGE:
+ default:
+ {
+ /* not supported ts type */
+ return FAILED;
+ }
+ }
+
+
+ return SUCCESS;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.get_encoding_rules.
+ */
+static void get_encoding_rules(private_traffic_selector_substructure_t *this, encoding_rule_t **rules, size_t *rule_count)
+{
+ *rules = traffic_selector_substructure_encodings;
+ *rule_count = sizeof(traffic_selector_substructure_encodings) / sizeof(encoding_rule_t);
+}
+
+/**
+ * Implementation of payload_t.get_type.
+ */
+static payload_type_t get_payload_type(private_traffic_selector_substructure_t *this)
+{
+ return TRAFFIC_SELECTOR_SUBSTRUCTURE;
+}
+
+/**
+ * Implementation of payload_t.get_next_type.
+ */
+static payload_type_t get_next_type(private_traffic_selector_substructure_t *this)
+{
+ return 0;
+}
+
+/**
+ * Implementation of payload_t.set_next_type.
+ */
+static void set_next_type(private_traffic_selector_substructure_t *this,payload_type_t type)
+{
+}
+
+/**
+ * Implementation of payload_t.get_length.
+ */
+static size_t get_length(private_traffic_selector_substructure_t *this)
+{
+ return this->payload_length;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.get_ts_type.
+ */
+static ts_type_t get_ts_type (private_traffic_selector_substructure_t *this)
+{
+ return this->ts_type;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.set_ts_type.
+ */
+static void set_ts_type (private_traffic_selector_substructure_t *this,ts_type_t ts_type)
+{
+ this->ts_type = ts_type;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.get_protocol_id.
+ */
+static u_int8_t get_protocol_id (private_traffic_selector_substructure_t *this)
+{
+ return this->ip_protocol_id;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.set_protocol_id.
+ */
+static void set_protocol_id (private_traffic_selector_substructure_t *this,u_int8_t protocol_id)
+{
+ this->ip_protocol_id = protocol_id;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.get_start_host.
+ */
+static host_t * get_start_host (private_traffic_selector_substructure_t *this)
+{
+ return (host_create_from_chunk(AF_INET,this->starting_address, this->start_port));
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.set_start_host.
+ */
+static void set_start_host (private_traffic_selector_substructure_t *this,host_t *start_host)
+{
+ this->start_port = start_host->get_port(start_host);
+ if (this->starting_address.ptr != NULL)
+ {
+ allocator_free_chunk(&(this->starting_address));
+ }
+ this->starting_address = start_host->get_address_as_chunk(start_host);
+ this->payload_length = TRAFFIC_SELECTOR_HEADER_LENGTH + this->starting_address.len + this->ending_address.len;
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.get_end_host.
+ */
+static host_t *get_end_host (private_traffic_selector_substructure_t *this)
+{
+ return (host_create_from_chunk(AF_INET,this->ending_address, this->end_port));
+}
+
+/**
+ * Implementation of traffic_selector_substructure_t.set_end_host.
+ */
+static void set_end_host (private_traffic_selector_substructure_t *this,host_t *end_host)
+{
+ this->end_port = end_host->get_port(end_host);
+ if (this->ending_address.ptr != NULL)
+ {
+ allocator_free_chunk(&(this->ending_address));
+ }
+ this->ending_address = end_host->get_address_as_chunk(end_host);
+ this->payload_length = TRAFFIC_SELECTOR_HEADER_LENGTH + this->starting_address.len + this->ending_address.len;
+}
+
+/**
+ * Implementation of payload_t.destroy and traffic_selector_substructure_t.destroy.
+ */
+static void destroy(private_traffic_selector_substructure_t *this)
+{
+
+ if (this->starting_address.ptr != NULL)
+ {
+ allocator_free_chunk(&(this->starting_address));
+ }
+
+ if (this->ending_address.ptr != NULL)
+ {
+ allocator_free_chunk(&(this->ending_address));
+ }
+
+ allocator_free(this);
+}
+
+/*
+ * Described in header
+ */
+traffic_selector_substructure_t *traffic_selector_substructure_create(bool is_initiator)
+{
+ private_traffic_selector_substructure_t *this = allocator_alloc_thing(private_traffic_selector_substructure_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 (*) (traffic_selector_substructure_t *)) destroy;
+ this->public.get_ts_type = (ts_type_t (*) (traffic_selector_substructure_t *)) get_ts_type;
+ this->public.set_ts_type = (void (*) (traffic_selector_substructure_t *,ts_type_t)) set_ts_type;
+ this->public.get_protocol_id = (u_int8_t (*) (traffic_selector_substructure_t *)) get_protocol_id;
+ this->public.set_protocol_id = (void (*) (traffic_selector_substructure_t *,u_int8_t)) set_protocol_id;
+ this->public.get_start_host = (host_t * (*) (traffic_selector_substructure_t *))get_start_host;
+ this->public.set_start_host = (void (*) (traffic_selector_substructure_t *, host_t *))set_start_host;
+ this->public.get_end_host = (host_t * (*) (traffic_selector_substructure_t *))get_end_host;
+ this->public.set_end_host = (void (*) (traffic_selector_substructure_t *, host_t *))set_end_host;
+
+
+ /* private variables */
+ this->payload_length =TRAFFIC_SELECTOR_HEADER_LENGTH;
+ this->start_port = 0;
+ this->end_port = 0;
+ this->starting_address = CHUNK_INITIALIZER;
+ this->ending_address = CHUNK_INITIALIZER;
+ this->ip_protocol_id = 0;
+ /* must be set to be valid */
+ this->ts_type = TS_IPV4_ADDR_RANGE;
+
+ return (&(this->public));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-20 11:51:55 +0000