1 files changed, 361 insertions, 0 deletions
diff --git a/src/libcharon/plugins/uci/uci_config.c b/src/libcharon/plugins/uci/uci_config.c
new file mode 100644
index 000000000..bd58afbf0
--- /dev/null
+++ b/src/libcharon/plugins/uci/uci_config.c
@@ -0,0 +1,361 @@
+/*
+ * Copyright (C) 2008 Thomas Kallenberg
+ * Copyright (C) 2008 Tobias Brunner
+ * Copyright (C) 2008 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.
+ */
+
+#define _GNU_SOURCE
+#include <string.h>
+
+#include "uci_config.h"
+#include "uci_parser.h"
+
+#include <daemon.h>
+
+typedef struct private_uci_config_t private_uci_config_t;
+
+/**
+ * Private data of an uci_config_t object
+ */
+struct private_uci_config_t {
+
+	/**
+	 * Public part
+	 */
+	uci_config_t public;
+
+	/**
+	 * UCI parser context
+	 */
+	uci_parser_t *parser;
+};
+
+/**
+ * enumerator implementation for create_peer_cfg_enumerator
+ */
+typedef struct {
+	/** implements enumerator */
+	enumerator_t public;
+	/** currently enumerated peer config */
+	peer_cfg_t *peer_cfg;
+	/** inner uci_parser section enumerator */
+	enumerator_t *inner;
+} peer_enumerator_t;
+
+/**
+ * create a proposal from a string, with fallback to default
+ */
+static proposal_t *create_proposal(char *string, protocol_id_t proto)
+{
+	proposal_t *proposal = NULL;
+
+	if (string)
+	{
+		proposal = proposal_create_from_string(proto, string);
+	}
+	if (!proposal)
+	{	/* UCI default is aes/sha1 only */
+		if (proto == PROTO_IKE)
+		{
+			proposal = proposal_create_from_string(proto,
+								"aes128-aes192-aes256-sha1-modp1536-modp2048");
+		}
+		else
+		{
+			proposal = proposal_create_from_string(proto,
+								"aes128-aes192-aes256-sha1");
+		}
+	}
+	return proposal;
+}
+
+/**
+ * create an traffic selector, fallback to dynamic
+ */
+static traffic_selector_t *create_ts(char *string)
+{
+	if (string)
+	{
+		int netbits = 32;
+		host_t *net;
+		char *pos;
+
+		string = strdupa(string);
+		pos = strchr(string, '/');
+		if (pos)
+		{
+			*pos++ = '\0';
+			netbits = atoi(pos);
+		}
+		else
+		{
+			if (strchr(string, ':'))
+			{
+				netbits = 128;
+			}
+		}
+		net = host_create_from_string(string, 0);
+		if (net)
+		{
+			return traffic_selector_create_from_subnet(net, netbits, 0, 0);
+		}
+	}
+	return traffic_selector_create_dynamic(0, 0, 65535);
+}
+
+/**
+ * create a rekey time from a string with hours, with fallback
+ */
+static u_int create_rekey(char *string)
+{
+	u_int rekey = 0;
+
+	if (string)
+	{
+		rekey = atoi(string);
+		if (rekey)
+		{
+			return rekey * 3600;
+		}
+	}
+	/* every 12 hours */
+	return 12 * 3600;
+}
+
+/**
+ * Implementation of peer_enumerator_t.public.enumerate
+ */
+static bool peer_enumerator_enumerate(peer_enumerator_t *this, peer_cfg_t **cfg)
+{
+	char *name, *ike_proposal, *esp_proposal, *ike_rekey, *esp_rekey;
+	char *local_id, *local_addr, *local_net;
+	char *remote_id, *remote_addr, *remote_net;
+	child_cfg_t *child_cfg;
+	ike_cfg_t *ike_cfg;
+	auth_cfg_t *auth;
+	lifetime_cfg_t lifetime = {
+		.time = {
+			.life = create_rekey(esp_rekey) + 300,
+			.rekey = create_rekey(esp_rekey),
+			.jitter = 300
+		}
+	};
+
+	/* defaults */
+	name = "unnamed";
+	local_id = NULL;
+	remote_id = NULL;
+	local_addr = "0.0.0.0";
+	remote_addr = "0.0.0.0";
+	local_net = NULL;
+	remote_net = NULL;
+	ike_proposal = NULL;
+	esp_proposal = NULL;
+	ike_rekey = NULL;
+	esp_rekey = NULL;
+
+	if (this->inner->enumerate(this->inner, &name, &local_id, &remote_id,
+			&local_addr, &remote_addr, &local_net, &remote_net,
+			&ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
+	{
+		DESTROY_IF(this->peer_cfg);
+		ike_cfg = ike_cfg_create(FALSE, FALSE,
+					local_addr, IKEV2_UDP_PORT, remote_addr, IKEV2_UDP_PORT);
+		ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
+		this->peer_cfg = peer_cfg_create(
+					name, 2, ike_cfg, CERT_SEND_IF_ASKED, UNIQUE_NO,
+					1, create_rekey(ike_rekey), 0,  /* keytries, rekey, reauth */
+					1800, 900,						/* jitter, overtime */
+					TRUE, 60, 						/* mobike, dpddelay */
+					NULL, NULL, 					/* vip, pool */
+					FALSE, NULL, NULL); 			/* mediation, med by, peer id */
+		auth = auth_cfg_create();
+		auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
+		auth->add(auth, AUTH_RULE_IDENTITY,
+				  identification_create_from_string(local_id));
+		this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, TRUE);
+
+		auth = auth_cfg_create();
+		auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
+		if (remote_id)
+		{
+			auth->add(auth, AUTH_RULE_IDENTITY,
+					  identification_create_from_string(remote_id));
+		}
+		this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, FALSE);
+
+		child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
+									 ACTION_NONE, ACTION_NONE, FALSE, 0);
+		child_cfg->add_proposal(child_cfg, create_proposal(esp_proposal, PROTO_ESP));
+		child_cfg->add_traffic_selector(child_cfg, TRUE, create_ts(local_net));
+		child_cfg->add_traffic_selector(child_cfg, FALSE, create_ts(remote_net));
+		this->peer_cfg->add_child_cfg(this->peer_cfg, child_cfg);
+		*cfg = this->peer_cfg;
+		return TRUE;
+	}
+	return FALSE;
+}
+
+/**
+ * Implementation of peer_enumerator_t.public.destroy
+ */
+static void peer_enumerator_destroy(peer_enumerator_t *this)
+{
+	DESTROY_IF(this->peer_cfg);
+	this->inner->destroy(this->inner);
+	free(this);
+}
+
+/**
+ * Implementation of backend_t.create_peer_cfg_enumerator.
+ */
+static enumerator_t* create_peer_cfg_enumerator(private_uci_config_t *this,
+												identification_t *me,
+												identification_t *other)
+{
+	peer_enumerator_t *e = malloc_thing(peer_enumerator_t);
+
+	e->public.enumerate = (void*)peer_enumerator_enumerate;
+	e->public.destroy = (void*)peer_enumerator_destroy;
+	e->peer_cfg = NULL;
+	e->inner = this->parser->create_section_enumerator(this->parser,
+					"local_id", "remote_id", "local_addr", "remote_addr",
+					"local_net", "remote_net", "ike_proposal", "esp_proposal",
+					"ike_rekey", "esp_rekey", NULL);
+	if (!e->inner)
+	{
+		free(e);
+		return NULL;
+	}
+	return &e->public;
+}
+
+/**
+ * enumerator implementation for create_ike_cfg_enumerator
+ */
+typedef struct {
+	/** implements enumerator */
+	enumerator_t public;
+	/** currently enumerated ike config */
+	ike_cfg_t *ike_cfg;
+	/** inner uci_parser section enumerator */
+	enumerator_t *inner;
+} ike_enumerator_t;
+
+/**
+ * Implementation of peer_enumerator_t.public.enumerate
+ */
+static bool ike_enumerator_enumerate(ike_enumerator_t *this, ike_cfg_t **cfg)
+{
+	char *local_addr, *remote_addr, *ike_proposal;
+
+	/* defaults */
+	local_addr = "0.0.0.0";
+	remote_addr = "0.0.0.0";
+	ike_proposal = NULL;
+
+	if (this->inner->enumerate(this->inner, NULL,
+							   &local_addr, &remote_addr, &ike_proposal))
+	{
+		DESTROY_IF(this->ike_cfg);
+		this->ike_cfg = ike_cfg_create(FALSE, FALSE, local_addr, IKEV2_UDP_PORT,
+										remote_addr, IKEV2_UDP_PORT);
+		this->ike_cfg->add_proposal(this->ike_cfg,
+									create_proposal(ike_proposal, PROTO_IKE));
+
+		*cfg = this->ike_cfg;
+		return TRUE;
+	}
+	return FALSE;
+}
+
+/**
+ * Implementation of ike_enumerator_t.public.destroy
+ */
+static void ike_enumerator_destroy(ike_enumerator_t *this)
+{
+	DESTROY_IF(this->ike_cfg);
+	this->inner->destroy(this->inner);
+	free(this);
+}
+
+/**
+ * Implementation of backend_t.create_ike_cfg_enumerator.
+ */
+static enumerator_t* create_ike_cfg_enumerator(private_uci_config_t *this,
+											   host_t *me, host_t *other)
+{
+	ike_enumerator_t *e = malloc_thing(ike_enumerator_t);
+
+	e->public.enumerate = (void*)ike_enumerator_enumerate;
+	e->public.destroy = (void*)ike_enumerator_destroy;
+	e->ike_cfg = NULL;
+	e->inner = this->parser->create_section_enumerator(this->parser,
+							"local_addr", "remote_addr", "ike_proposal", NULL);
+	if (!e->inner)
+	{
+		free(e);
+		return NULL;
+	}
+	return &e->public;
+}
+
+/**
+ * implements backend_t.get_peer_cfg_by_name.
+ */
+static peer_cfg_t *get_peer_cfg_by_name(private_uci_config_t *this, char *name)
+{
+	enumerator_t *enumerator;
+	peer_cfg_t *current, *found = NULL;
+
+	enumerator = create_peer_cfg_enumerator(this, NULL, NULL);
+	if (enumerator)
+	{
+		while (enumerator->enumerate(enumerator, &current))
+		{
+			if (streq(name, current->get_name(current)))
+			{
+				found = current->get_ref(current);
+				break;
+			}
+		}
+		enumerator->destroy(enumerator);
+	}
+	return found;
+}
+
+/**
+ * Implementation of uci_config_t.destroy.
+ */
+static void destroy(private_uci_config_t *this)
+{
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+uci_config_t *uci_config_create(uci_parser_t *parser)
+{
+	private_uci_config_t *this = malloc_thing(private_uci_config_t);
+
+	this->public.backend.create_peer_cfg_enumerator = (enumerator_t*(*)(backend_t*, identification_t *me, identification_t *other))create_peer_cfg_enumerator;
+	this->public.backend.create_ike_cfg_enumerator = (enumerator_t*(*)(backend_t*, host_t *me, host_t *other))create_ike_cfg_enumerator;
+	this->public.backend.get_peer_cfg_by_name = (peer_cfg_t* (*)(backend_t*,char*))get_peer_cfg_by_name;
+	this->public.destroy = (void(*)(uci_config_t*))destroy;
+	this->parser = parser;
+
+	return &this->public;
+}
+