/* * 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 . * * 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 #include "uci_config.h" #include "uci_parser.h" #include 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) { traffic_selector_t *ts; ts = traffic_selector_create_from_cidr(string, 0, 0, 65535); if (ts) { return ts; } } 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; } METHOD(enumerator_t, peer_enumerator_enumerate, bool, 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; peer_cfg_create_t peer = { .cert_policy = CERT_SEND_IF_ASKED, .unique = UNIQUE_NO, .keyingtries = 1, .jitter_time = 1800, .over_time = 900, .dpd = 60, }; child_cfg_create_t child = { .lifetime = { .time = { .life = create_rekey(esp_rekey) + 300, .rekey = create_rekey(esp_rekey), .jitter = 300 }, }, .mode = MODE_TUNNEL, }; /* 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(IKEV2, FALSE, FALSE, local_addr, charon->socket->get_port(charon->socket, FALSE), remote_addr, IKEV2_UDP_PORT, FRAGMENTATION_NO, 0); ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE)); peer.rekey_time = create_rekey(ike_rekey); this->peer_cfg = peer_cfg_create(name, ike_cfg, &peer); 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, &child); 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; } METHOD(enumerator_t, peer_enumerator_destroy, void, peer_enumerator_t *this) { DESTROY_IF(this->peer_cfg); this->inner->destroy(this->inner); free(this); } METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*, private_uci_config_t *this, identification_t *me, identification_t *other) { peer_enumerator_t *e; INIT(e, .public = { .enumerate = (void*)_peer_enumerator_enumerate, .destroy = _peer_enumerator_destroy, }, .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; METHOD(enumerator_t, ike_enumerator_enumerate, bool, 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(IKEV2, FALSE, FALSE, local_addr, charon->socket->get_port(charon->socket, FALSE), remote_addr, IKEV2_UDP_PORT, FRAGMENTATION_NO, 0); this->ike_cfg->add_proposal(this->ike_cfg, create_proposal(ike_proposal, PROTO_IKE)); *cfg = this->ike_cfg; return TRUE; } return FALSE; } METHOD(enumerator_t, ike_enumerator_destroy, void, ike_enumerator_t *this) { DESTROY_IF(this->ike_cfg); this->inner->destroy(this->inner); free(this); } METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*, private_uci_config_t *this, host_t *me, host_t *other) { ike_enumerator_t *e; INIT(e, .public = { .enumerate = (void*)_ike_enumerator_enumerate, .destroy = _ike_enumerator_destroy, }, .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; } METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*, 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, ¤t)) { if (streq(name, current->get_name(current))) { found = current->get_ref(current); break; } } enumerator->destroy(enumerator); } return found; } METHOD(uci_config_t, destroy, void, 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; INIT(this, .public = { .backend = { .create_peer_cfg_enumerator = _create_peer_cfg_enumerator, .create_ike_cfg_enumerator = _create_ike_cfg_enumerator, .get_peer_cfg_by_name = _get_peer_cfg_by_name, }, .destroy = _destroy, }, .parser = parser, ); return &this->public; }