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authorYves-Alexis Perez <corsac@debian.org>2013-01-02 14:18:20 +0100
committerYves-Alexis Perez <corsac@debian.org>2013-01-02 14:18:20 +0100
commitc1343b3278cdf99533b7902744d15969f9d6fdc1 (patch)
treed5ed3dc5677a59260ec41cd39bb284d3e94c91b3 /src/pluto/connections.c
parentb34738ed08c2227300d554b139e2495ca5da97d6 (diff)
downloadvyos-strongswan-c1343b3278cdf99533b7902744d15969f9d6fdc1.tar.gz
vyos-strongswan-c1343b3278cdf99533b7902744d15969f9d6fdc1.zip
Imported Upstream version 5.0.1
Diffstat (limited to 'src/pluto/connections.c')
-rw-r--r--src/pluto/connections.c4507
1 files changed, 0 insertions, 4507 deletions
diff --git a/src/pluto/connections.c b/src/pluto/connections.c
deleted file mode 100644
index 27cec40fc..000000000
--- a/src/pluto/connections.c
+++ /dev/null
@@ -1,4507 +0,0 @@
-/* information about connections between hosts and clients
- * Copyright (C) 1998-2002 D. Hugh Redelmeier.
- * Copyright (C) 2009 Andreas Steffen - 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 <string.h>
-#include <stdio.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <resolv.h>
-#include <arpa/nameser.h> /* missing from <resolv.h> on old systems */
-#include <sys/queue.h>
-
-#include <freeswan.h>
-#include "kameipsec.h"
-
-#include <hydra.h>
-#include <credentials/certificates/ac.h>
-#include <credentials/keys/private_key.h>
-
-#include "constants.h"
-#include "defs.h"
-#include "myid.h"
-#include "x509.h"
-#include "ca.h"
-#include "crl.h"
-#include "certs.h"
-#include "ac.h"
-#include "smartcard.h"
-#include "fetch.h"
-#include "connections.h"
-#include "foodgroups.h"
-#include "demux.h"
-#include "state.h"
-#include "timer.h"
-#include "ipsec_doi.h" /* needs demux.h and state.h */
-#include "server.h"
-#include "kernel.h"
-#include "log.h"
-#include "keys.h"
-#include "adns.h" /* needs <resolv.h> */
-#include "dnskey.h" /* needs keys.h and adns.h */
-#include "whack.h"
-#include "alg_info.h"
-#include "ike_alg.h"
-#include "kernel_alg.h"
-#include "nat_traversal.h"
-#include "virtual.h"
-#include "whack_attribute.h"
-#include "modecfg.h"
-
-static void flush_pending_by_connection(connection_t *c); /* forward */
-
-static connection_t *connections = NULL;
-
-/* struct host_pair: a nexus of information about a pair of hosts.
- * A host is an IP address, UDP port pair. This is a debatable choice:
- * - should port be considered (no choice of port in standard)?
- * - should ID be considered (hard because not always known)?
- * - should IP address matter on our end (we don't know our end)?
- * Only oriented connections are registered.
- * Unoriented connections are kept on the unoriented_connections
- * linked list (using hp_next). For them, host_pair is NULL.
- */
-
-struct host_pair {
- struct {
- ip_address addr;
- u_int16_t port; /* host order */
- } me, him;
- bool initial_connection_sent;
- connection_t *connections; /* connections with this pair */
- struct pending *pending; /* awaiting Keying Channel */
- struct host_pair *next;
-};
-
-static struct host_pair *host_pairs = NULL;
-
-static connection_t *unoriented_connections = NULL;
-
-/**
- * Check if an id was instantiated by assigning to it the current IP address
- */
-bool his_id_was_instantiated(const connection_t *c)
-{
- if (c->kind != CK_INSTANCE)
- {
- return FALSE;
- }
- if (id_is_ipaddr(c->spd.that.id))
- {
- identification_t *host;
- bool equal;
-
- host = identification_create_from_sockaddr((sockaddr_t*)&c->spd.that.host_addr);
- equal = host->equals(host, c->spd.that.id);
- host->destroy(host);
- return equal;
- }
- else
- {
- return TRUE;
- }
-}
-
-/**
- * Check to see that IDs of peers match
- */
-bool same_peer_ids(const connection_t *c, const connection_t *d,
- identification_t *his_id)
-{
- return d->spd.this.id->equals(d->spd.this.id, c->spd.this.id) &&
- d->spd.that.id->equals(d->spd.that.id,
- his_id ? his_id : c->spd.that.id);
-}
-
-static struct host_pair *find_host_pair(const ip_address *myaddr,
- u_int16_t myport,
- const ip_address *hisaddr,
- u_int16_t hisport)
-{
- struct host_pair *p, *prev;
-
- /* default hisaddr to an appropriate any */
- if (hisaddr == NULL)
- hisaddr = aftoinfo(addrtypeof(myaddr))->any;
-
- if (nat_traversal_enabled)
- {
- /**
- * port is not relevant in host_pair. with nat_traversal we
- * always use pluto_port (500)
- */
- myport = pluto_port;
- hisport = pluto_port;
- }
-
- for (prev = NULL, p = host_pairs; p != NULL; prev = p, p = p->next)
- {
- if (sameaddr(&p->me.addr, myaddr) && p->me.port == myport
- && sameaddr(&p->him.addr, hisaddr) && p->him.port == hisport)
- {
- if (prev)
- {
- prev->next = p->next; /* remove p from list */
- p->next = host_pairs; /* and stick it on front */
- host_pairs = p;
- }
- break;
- }
- }
- return p;
-}
-
-/* find head of list of connections with this pair of hosts */
-static connection_t *find_host_pair_connections(const ip_address *myaddr,
- u_int16_t myport,
- const ip_address *hisaddr,
- u_int16_t hisport)
-{
- struct host_pair *hp = find_host_pair(myaddr, myport, hisaddr, hisport);
-
- if (nat_traversal_enabled && hp && hisaddr)
- {
- connection_t *c;
-
- for (c = hp->connections; c != NULL; c = c->hp_next)
- {
- if (c->spd.this.host_port == myport && c->spd.that.host_port == hisport)
- return c;
- }
- return NULL;
- }
- return hp == NULL? NULL : hp->connections;
-}
-
-static void connect_to_host_pair(connection_t *c)
-{
- if (oriented(*c))
- {
- struct host_pair *hp;
-
- ip_address his_addr = (c->spd.that.allow_any)
- ? *aftoinfo(addrtypeof(&c->spd.that.host_addr))->any
- : c->spd.that.host_addr;
-
- hp = find_host_pair(&c->spd.this.host_addr, c->spd.this.host_port
- , &his_addr, c->spd.that.host_port);
-
- if (hp == NULL)
- {
- /* no suitable host_pair -- build one */
- hp = malloc_thing(struct host_pair);
- hp->me.addr = c->spd.this.host_addr;
- hp->him.addr = his_addr;
- hp->me.port = nat_traversal_enabled ? pluto_port : c->spd.this.host_port;
- hp->him.port = nat_traversal_enabled ? pluto_port : c->spd.that.host_port;
- hp->initial_connection_sent = FALSE;
- hp->connections = NULL;
- hp->pending = NULL;
- hp->next = host_pairs;
- host_pairs = hp;
- }
- c->host_pair = hp;
- c->hp_next = hp->connections;
- hp->connections = c;
- }
- else
- {
- /* since this connection isn't oriented, we place it
- * in the unoriented_connections list instead.
- */
- c->host_pair = NULL;
- c->hp_next = unoriented_connections;
- unoriented_connections = c;
- }
-}
-
-/* find a connection by name.
- * If strict, don't accept a CK_INSTANCE.
- * Move the winner (if any) to the front.
- * If none is found, and strict, a diagnostic is logged to whack.
- */
-connection_t *con_by_name(const char *nm, bool strict)
-{
- connection_t *p, *prev;
-
- for (prev = NULL, p = connections; ; prev = p, p = p->ac_next)
- {
- if (p == NULL)
- {
- if (strict)
- whack_log(RC_UNKNOWN_NAME
- , "no connection named \"%s\"", nm);
- break;
- }
- if (streq(p->name, nm)
- && (!strict || p->kind != CK_INSTANCE))
- {
- if (prev)
- {
- prev->ac_next = p->ac_next; /* remove p from list */
- p->ac_next = connections; /* and stick it on front */
- connections = p;
- }
- break;
- }
- }
- return p;
-}
-
-void release_connection(connection_t *c, bool relations)
-{
- if (c->kind == CK_INSTANCE)
- {
- /* This does everything we need.
- * Note that we will be called recursively by delete_connection,
- * but kind will be CK_GOING_AWAY.
- */
- delete_connection(c, relations);
- }
- else
- {
- flush_pending_by_connection(c);
- delete_states_by_connection(c, relations);
- unroute_connection(c);
- }
-}
-
-/* Delete a connection */
-
-#define list_rm(etype, enext, e, ehead) { \
- etype **ep; \
- for (ep = &(ehead); *ep != (e); ep = &(*ep)->enext) \
- passert(*ep != NULL); /* we must not come up empty-handed */ \
- *ep = (e)->enext; \
- }
-
-
-void delete_connection(connection_t *c, bool relations)
-{
- modecfg_attribute_t *ca;
- connection_t *old_cur_connection;
- identification_t *client_id;
-
- old_cur_connection = cur_connection == c? NULL : cur_connection;
-#ifdef DEBUG
- lset_t old_cur_debugging = cur_debugging;
-#endif
-
- set_cur_connection(c);
-
- /* Must be careful to avoid circularity:
- * we mark c as going away so it won't get deleted recursively.
- */
- passert(c->kind != CK_GOING_AWAY);
- if (c->kind == CK_INSTANCE)
- {
- plog("deleting connection \"%s\" instance with peer %s {isakmp=#%lu/ipsec=#%lu}"
- , c->name
- , ip_str(&c->spd.that.host_addr)
- , c->newest_isakmp_sa, c->newest_ipsec_sa);
- c->kind = CK_GOING_AWAY;
- }
- else
- {
- plog("deleting connection");
- }
- release_connection(c, relations); /* won't delete c */
-
- if (c->kind == CK_GROUP)
- {
- delete_group(c);
- }
-
- /* free up any logging resources */
- perpeer_logfree(c);
-
- /* find and delete c from connections list */
- list_rm(connection_t, ac_next, c, connections);
- cur_connection = old_cur_connection;
-
- /* find and delete c from the host pair list */
- if (c->host_pair == NULL)
- {
- if (c->ikev1)
- {
- list_rm(connection_t, hp_next, c, unoriented_connections);
- }
- }
- else
- {
- struct host_pair *hp = c->host_pair;
-
- list_rm(connection_t, hp_next, c, hp->connections);
- c->host_pair = NULL; /* redundant, but safe */
-
- /* if there are no more connections with this host_pair
- * and we haven't even made an initial contact, let's delete
- * this guy in case we were created by an attempted DOS attack.
- */
- if (hp->connections == NULL
- && !hp->initial_connection_sent)
- {
- passert(hp->pending == NULL); /* ??? must deal with this! */
- list_rm(struct host_pair, next, hp, host_pairs);
- free(hp);
- }
- }
- if (c->kind != CK_GOING_AWAY)
- {
- free(c->spd.that.virt);
- }
-
- client_id = (c->xauth_identity) ? c->xauth_identity : c->spd.that.id;
-
- /* release virtual IP address lease if any */
- if (c->spd.that.modecfg && c->spd.that.pool &&
- !c->spd.that.host_srcip->is_anyaddr(c->spd.that.host_srcip))
- {
- hydra->attributes->release_address(hydra->attributes, c->spd.that.pool,
- c->spd.that.host_srcip, client_id);
- }
-
- /* release requested attributes if any */
- if (c->requested)
- {
- c->requested->destroy_function(c->requested,
- (void*)modecfg_attribute_destroy);
- }
-
- /* release other attributes if any */
- if (c->attributes)
- {
- while (c->attributes->remove_last(c->attributes, (void **)&ca) == SUCCESS)
- {
- hydra->attributes->release(hydra->attributes, ca->handler,
- client_id, ca->type, ca->value);
- modecfg_attribute_destroy(ca);
- }
- c->attributes->destroy(c->attributes);
- }
-
- if (c->kind != CK_GOING_AWAY)
- {
- whack_attr->del_pool(whack_attr, c->name);
- }
-
- /* free internal data */
-#ifdef DEBUG
- cur_debugging = old_cur_debugging;
-#endif
- free(c->name);
- DESTROY_IF(c->xauth_identity);
- DESTROY_IF(c->spd.this.id);
- DESTROY_IF(c->spd.this.ca);
- DESTROY_IF(c->spd.this.groups);
- DESTROY_IF(c->spd.this.host_srcip);
- free(c->spd.this.updown);
- free(c->spd.this.pool);
- DESTROY_IF(c->spd.that.id);
- DESTROY_IF(c->spd.that.ca);
- DESTROY_IF(c->spd.that.groups);
- DESTROY_IF(c->spd.that.host_srcip);
- free(c->spd.that.updown);
- free(c->spd.that.pool);
- if (c->requested_ca)
- {
- c->requested_ca->destroy_offset(c->requested_ca,
- offsetof(identification_t, destroy));
- }
-#ifdef ADNS
- gw_delref(&c->gw_info);
-#endif
- lock_certs_and_keys("delete_connection");
- cert_release(c->spd.this.cert);
- scx_release(c->spd.this.sc);
- cert_release(c->spd.that.cert);
- scx_release(c->spd.that.sc);
- unlock_certs_and_keys("delete_connection");
-
- alg_info_delref((struct alg_info **)&c->alg_info_esp);
- alg_info_delref((struct alg_info **)&c->alg_info_ike);
-
- free(c);
-}
-
-/* Delete connections with the specified name */
-void delete_connections_by_name(const char *name, bool strict)
-{
- connection_t *c = con_by_name(name, strict);
-
- for (; c != NULL; c = con_by_name(name, FALSE))
- delete_connection(c, FALSE);
-}
-
-void delete_every_connection(void)
-{
- while (connections)
- {
- delete_connection(connections, TRUE);
- }
-}
-
-void release_dead_interfaces(void)
-{
- struct host_pair *hp;
-
- for (hp = host_pairs; hp != NULL; hp = hp->next)
- {
- connection_t **pp
- , *p;
-
- for (pp = &hp->connections; (p = *pp) != NULL; )
- {
- if (p->interface->change == IFN_DELETE)
- {
- /* this connection's interface is going away */
- enum connection_kind k = p->kind;
-
- release_connection(p, TRUE);
-
- if (k <= CK_PERMANENT)
- {
- /* The connection should have survived release:
- * move it to the unoriented_connections list.
- */
- passert(p == *pp);
-
- p->interface = NULL;
-
- *pp = p->hp_next; /* advance *pp */
- p->host_pair = NULL;
- p->hp_next = unoriented_connections;
- unoriented_connections = p;
- }
- else
- {
- /* The connection should have vanished,
- * but the previous connection remains.
- */
- passert(p != *pp);
- }
- }
- else
- {
- pp = &p->hp_next; /* advance pp */
- }
- }
- }
-}
-
-/* adjust orientations of connections to reflect newly added interfaces */
-void check_orientations(void)
-{
- /* try to orient all the unoriented connections */
- {
- connection_t *c = unoriented_connections;
-
- unoriented_connections = NULL;
-
- while (c)
- {
- connection_t *nxt = c->hp_next;
-
- (void)orient(c);
- connect_to_host_pair(c);
- c = nxt;
- }
- }
-
- /* Check that no oriented connection has become double-oriented.
- * In other words, the far side must not match one of our new interfaces.
- */
- {
- struct iface *i;
-
- for (i = interfaces; i != NULL; i = i->next)
- {
- if (i->change == IFN_ADD)
- {
- struct host_pair *hp;
-
- for (hp = host_pairs; hp != NULL; hp = hp->next)
- {
- if (sameaddr(&hp->him.addr, &i->addr)
- && hp->him.port == pluto_port)
- {
- /* bad news: the whole chain of connections
- * hanging off this host pair has both sides
- * matching an interface.
- * We'll get rid of them, using orient and
- * connect_to_host_pair. But we'll be lazy
- * and not ditch the host_pair itself (the
- * cost of leaving it is slight and cannot
- * be induced by a foe).
- */
- connection_t *c = hp->connections;
-
- hp->connections = NULL;
- while (c)
- {
- connection_t *nxt = c->hp_next;
-
- c->interface = NULL;
- (void)orient(c);
- connect_to_host_pair(c);
- c = nxt;
- }
- }
- }
- }
- }
- }
-}
-
-static err_t default_end(struct end *e, ip_address *dflt_nexthop)
-{
- err_t ugh = NULL;
- int af = addrtypeof(&e->host_addr);
-
- if (af != AF_INET && af != AF_INET6)
- {
- return "unknown address family in default_end";
- }
-
- /* default ID to IP (but only if not NO_IP -- WildCard) */
- if (e->id->get_type(e->id) == ID_ANY && !isanyaddr(&e->host_addr))
- {
- e->id->destroy(e->id);
- e->id = identification_create_from_sockaddr((sockaddr_t*)&e->host_addr);
- e->has_id_wildcards = FALSE;
- }
-
- /* default nexthop to other side */
- if (isanyaddr(&e->host_nexthop))
- {
- e->host_nexthop = *dflt_nexthop;
- }
-
- /* default client to subnet containing only self
- * XXX This may mean that the client's address family doesn't match
- * tunnel_addr_family.
- */
- if (!e->has_client)
- {
- ugh = addrtosubnet(&e->host_addr, &e->client);
- }
- return ugh;
-}
-
-/* Format the topology of a connection end, leaving out defaults.
- * Largest left end looks like: client === host : port [ host_id ] --- hop
- * Note: if that==NULL, skip nexthop
- * Returns strlen of formated result (length excludes NUL at end).
- */
-size_t format_end(char *buf, size_t buf_len, const struct end *this,
- const struct end *that, bool is_left, lset_t policy)
-{
- char client[BUF_LEN];
- const char *client_sep = "";
- char protoport[sizeof(":255/65535")];
- const char *host = NULL;
- char host_space[ADDRTOT_BUF];
- char host_port[sizeof(":65535")];
- char host_id[BUF_LEN + 2];
- char hop[ADDRTOT_BUF];
- const char *hop_sep = "";
- const char *open_brackets = "";
- const char *close_brackets = "";
-
- if (isanyaddr(&this->host_addr))
- {
- switch (policy & (POLICY_GROUP | POLICY_OPPO))
- {
- case POLICY_GROUP:
- host = "%group";
- break;
- case POLICY_OPPO:
- host = "%opportunistic";
- break;
- case POLICY_GROUP | POLICY_OPPO:
- host = "%opportunisticgroup";
- break;
- default:
- host = "%any";
- break;
- }
- }
-
- client[0] = '\0';
-
- if (is_virtual_end(this) && isanyaddr(&this->host_addr))
- {
- host = "%virtual";
- }
-
- /* [client===] */
- if (this->has_client)
- {
- ip_address client_net, client_mask;
-
- networkof(&this->client, &client_net);
- maskof(&this->client, &client_mask);
- client_sep = "===";
-
- /* {client_subnet_wildcard} */
- if (this->has_client_wildcard)
- {
- open_brackets = "{";
- close_brackets = "}";
- }
-
- if (isanyaddr(&client_net) && isanyaddr(&client_mask)
- && (policy & (POLICY_GROUP | POLICY_OPPO)))
- {
- client_sep = ""; /* boring case */
- }
- else if (subnetisnone(&this->client))
- {
- strncpy(client, "?", sizeof(client));
- }
- else
- {
- subnettot(&this->client, 0, client, sizeof(client));
- }
- }
- else if (this->modecfg && this->host_srcip->is_anyaddr(this->host_srcip))
- {
- /* we are mode config client, or a server with a pool */
- client_sep = "===";
- client[0] = '%';
- strncpy(client+1, this->pool ?: "modecfg", sizeof(client)-1);
- }
-
- /* host */
- if (host == NULL)
- {
- addrtot(&this->host_addr, 0, host_space, sizeof(host_space));
- host = host_space;
- }
-
- host_port[0] = '\0';
- if (this->host_port != IKE_UDP_PORT)
- {
- snprintf(host_port, sizeof(host_port), ":%u", this->host_port);
- }
-
- /* payload portocol and port */
- protoport[0] = '\0';
- if (this->has_port_wildcard)
- {
- snprintf(protoport, sizeof(protoport), ":%u/%%any", this->protocol);
- }
- else if (this->port || this->protocol)
- {
- snprintf(protoport, sizeof(protoport), ":%u/%u", this->protocol
- , this->port);
- }
-
- /* id */
- snprintf(host_id, sizeof(host_id), "[%Y]", this->id);
-
- /* [---hop] */
- hop[0] = '\0';
- hop_sep = "";
- if (that && !sameaddr(&this->host_nexthop, &that->host_addr))
- {
- addrtot(&this->host_nexthop, 0, hop, sizeof(hop));
- hop_sep = "---";
- }
-
- if (is_left)
- {
- snprintf(buf, buf_len, "%s%s%s%s%s%s%s%s%s%s%s"
- , open_brackets, client, close_brackets, client_sep
- , this->allow_any? "%":""
- , host, host_port, host_id, protoport
- , hop_sep, hop);
- }
- else
- {
- snprintf(buf, buf_len, "%s%s%s%s%s%s%s%s%s%s%s"
- , hop, hop_sep
- , this->allow_any? "%":""
- , host, host_port, host_id, protoport, client_sep
- , open_brackets, client, close_brackets);
- }
- return strlen(buf);
-}
-
-/* format topology of a connection.
- * Two symmetric ends separated by ...
- */
-#define CONNECTION_BUF (2 * (END_BUF - 1) + 4)
-
-static size_t format_connection(char *buf, size_t buf_len,
- const connection_t *c,
- struct spd_route *sr)
-{
- size_t w = format_end(buf, buf_len, &sr->this, &sr->that, TRUE, LEMPTY);
-
- w += snprintf(buf + w, buf_len - w, "...");
- return w + format_end(buf + w, buf_len - w, &sr->that, &sr->this, FALSE, c->policy);
-}
-
-static void unshare_connection_strings(connection_t *c)
-{
- c->name = clone_str(c->name);
- if (c->xauth_identity)
- {
- c->xauth_identity = c->xauth_identity->clone(c->xauth_identity);
- }
- c->spd.this.id = c->spd.this.id->clone(c->spd.this.id);
- c->spd.this.pool = clone_str(c->spd.this.pool);
- c->spd.this.updown = clone_str(c->spd.this.updown);
- c->spd.this.host_srcip = c->spd.this.host_srcip->clone(c->spd.this.host_srcip);
- scx_share(c->spd.this.sc);
- cert_share(c->spd.this.cert);
- if (c->spd.this.ca)
- {
- c->spd.this.ca = c->spd.this.ca->clone(c->spd.this.ca);
- }
- if (c->spd.this.groups)
- {
- c->spd.this.groups = c->spd.this.groups->get_ref(c->spd.this.groups);
- }
- c->spd.that.id = c->spd.that.id->clone(c->spd.that.id);
- c->spd.that.pool = clone_str(c->spd.that.pool);
- c->spd.that.updown = clone_str(c->spd.that.updown);
- c->spd.that.host_srcip = c->spd.that.host_srcip->clone(c->spd.that.host_srcip);
- scx_share(c->spd.that.sc);
- cert_share(c->spd.that.cert);
- if (c->spd.that.ca)
- {
- c->spd.that.ca = c->spd.that.ca->clone(c->spd.that.ca);
- }
- if (c->spd.that.groups)
- {
- c->spd.that.groups = c->spd.that.groups->get_ref(c->spd.that.groups);
- }
-
- /* increment references to algo's */
- alg_info_addref((struct alg_info *)c->alg_info_esp);
- alg_info_addref((struct alg_info *)c->alg_info_ike);
-}
-
-static void load_end_certificate(char *filename, struct end *dst)
-{
- time_t notBefore, notAfter;
- cert_t *cert = NULL;
- certificate_t *certificate;
- bool cached_cert = FALSE;
-
- /* initialize end certificate */
- dst->cert = NULL;
-
- /* initialize smartcard info record */
- dst->sc = NULL;
-
- if (filename)
- {
- if (scx_on_smartcard(filename))
- {
- /* load cert from smartcard */
- cert = scx_load_cert(filename, &dst->sc, &cached_cert);
- }
- else
- {
- /* load cert from file */
- cert = load_host_cert(filename);
- }
- }
-
- if (cert)
- {
- certificate = cert->cert;
-
- if (dst->id->get_type(dst->id) == ID_ANY ||
- !certificate->has_subject(certificate, dst->id))
- {
- plog( " id '%Y' not confirmed by certificate, defaulting to '%Y'",
- dst->id, certificate->get_subject(certificate));
- dst->id->destroy(dst->id);
- dst->id = certificate->get_subject(certificate);
- dst->id = dst->id->clone(dst->id);
- }
-
- if (cached_cert)
- {
- dst->cert = cert;
- }
- else
- {
- if (!certificate->get_validity(certificate, NULL, &notBefore, &notAfter))
- {
- plog("certificate is invalid (valid from %T to %T)",
- &notBefore, FALSE, &notAfter, FALSE);
- cert_free(cert);
- return;
- }
- DBG(DBG_CONTROL,
- DBG_log("certificate is valid")
- )
- add_public_key_from_cert(cert, notAfter, DAL_LOCAL);
- dst->cert = cert_add(cert);
- }
- certificate = dst->cert->cert;
-
- /* if no CA is defined, use issuer as default */
- if (dst->ca == NULL && certificate->get_type(certificate) == CERT_X509)
- {
- identification_t *issuer;
-
- issuer = certificate->get_issuer(certificate);
- dst->ca = issuer->clone(issuer);
- }
-
- /* cache the certificate that was last retrieved from the smartcard */
- if (dst->sc)
- {
- if (!dst->sc->last_cert ||
- !certificate->equals(certificate, dst->sc->last_cert->cert))
- {
- lock_certs_and_keys("load_end_certificates");
- cert_release(dst->sc->last_cert);
- dst->sc->last_cert = dst->cert;
- cert_share(dst->cert);
- unlock_certs_and_keys("load_end_certificates");
- }
- time(&dst->sc->last_load);
- }
- }
- scx_share(dst->sc);
- cert_share(dst->cert);
-}
-
-static bool extract_end(struct end *dst, const whack_end_t *src,
- const char *name, bool is_left)
-{
- bool same_ca = FALSE;
-
- dst->is_left = is_left;
- dst->id = identification_create_from_string(src->id);
- dst->ca = NULL;
-
- /* decode CA distinguished name, if any */
- if (src->ca)
- {
- if streq(src->ca, "%same")
- {
- same_ca = TRUE;
- }
- else if (!streq(src->ca, "%any"))
- {
- dst->ca = identification_create_from_string(src->ca);
- if (dst->ca->get_type(dst->ca) != ID_DER_ASN1_DN)
- {
- plog("bad CA string '%s', ignored", src->ca);
- dst->ca->destroy(dst->ca);
- dst->ca = NULL;
- }
- }
- }
-
- /* load local end certificate and extract ID, if any */
- load_end_certificate(src->cert, dst);
-
- /* does id has wildcards? */
- dst->has_id_wildcards = dst->id->contains_wildcards(dst->id);
-
- /* decode group attributes, if any */
- if (src->groups)
- {
- dst->groups = ietf_attributes_create_from_string(src->groups);
- }
-
- /* the rest is simple copying of corresponding fields */
- dst->host_addr = src->host_addr;
- dst->host_nexthop = src->host_nexthop;
- dst->host_srcip = host_create_from_sockaddr((sockaddr_t*)&src->host_srcip);
- dst->has_natip = src->has_natip;
- dst->client = src->client;
- dst->protocol = src->protocol;
- dst->port = src->port;
- dst->has_port_wildcard = src->has_port_wildcard;
- dst->key_from_DNS_on_demand = src->key_from_DNS_on_demand;
- dst->has_client = src->has_client;
- dst->has_client_wildcard = src->has_client_wildcard;
- dst->modecfg = src->modecfg;
- dst->hostaccess = src->hostaccess;
- dst->allow_any = src->allow_any;
- dst->sendcert = src->sendcert;
- dst->updown = clone_str(src->updown);
- dst->host_port = src->host_port;
-
- /* if the sourceip netmask is zero a named pool exists */
- if (src->sourceip_mask == 0)
- {
- dst->pool = clone_str(src->sourceip);
- }
-
- /* if host sourceip is defined but no client is present
- * behind the host then set client to sourceip/32
- */
- if (!dst->host_srcip->is_anyaddr(dst->host_srcip) &&
- !dst->has_natip && !dst->has_client)
- {
- ip_address addr;
- err_t ugh;
-
- addr = *(ip_address*)dst->host_srcip->get_sockaddr(dst->host_srcip);
- ugh = addrtosubnet(&addr, &dst->client);
-
- if (ugh)
- {
- plog("could not assign host sourceip to client subnet");
- }
- else
- {
- dst->has_client = TRUE;
- }
- }
- return same_ca;
-}
-
-static bool check_connection_end(const whack_end_t *this,
- const whack_end_t *that,
- const whack_message_t *wm)
-{
- if (wm->addr_family != addrtypeof(&this->host_addr)
- || wm->addr_family != addrtypeof(&this->host_nexthop)
- || (this->has_client? wm->tunnel_addr_family : wm->addr_family)
- != subnettypeof(&this->client)
- || subnettypeof(&this->client) != subnettypeof(&that->client))
- {
- /* this should have been diagnosed by whack, so we need not be clear
- * !!! overloaded use of RC_CLASH
- */
- loglog(RC_CLASH, "address family inconsistency in connection");
- return FALSE;
- }
-
- if (isanyaddr(&that->host_addr))
- {
- /* other side is wildcard: we must check if other conditions met */
- if (isanyaddr(&this->host_addr))
- {
- loglog(RC_ORIENT, "connection must specify host IP address for our side");
- return FALSE;
- }
- }
-
- if (this->virt && (!isanyaddr(&this->host_addr) || this->has_client))
- {
- loglog(RC_CLASH,
- "virtual IP must only be used with %%any and without client");
- return FALSE;
- }
-
- return TRUE; /* happy */
-}
-
-connection_t *find_connection_by_reqid(uint32_t reqid)
-{
- connection_t *c;
-
- reqid &= ~3;
- for (c = connections; c != NULL; c = c->ac_next)
- {
- if (c->spd.reqid == reqid)
- {
- return c;
- }
- }
-
- return NULL;
-}
-
-static uint32_t gen_reqid(void)
-{
- uint32_t start;
- static uint32_t reqid = IPSEC_MANUAL_REQID_MAX & ~3;
-
- start = reqid;
- do {
- reqid += 4;
- if (reqid == 0)
- {
- reqid = (IPSEC_MANUAL_REQID_MAX & ~3) + 4;
- }
- if (!find_connection_by_reqid(reqid))
- {
- return reqid;
- }
- } while (reqid != start);
-
- exit_log("unable to allocate reqid");
- return 0; /* never reached ... */
-}
-
-void add_connection(const whack_message_t *wm)
-{
- if (con_by_name(wm->name, FALSE) != NULL)
- {
- loglog(RC_DUPNAME, "attempt to redefine connection \"%s\"", wm->name);
- }
- else if (wm->right.protocol != wm->left.protocol)
- {
- /* this should haven been diagnosed by whack
- * !!! overloaded use of RC_CLASH
- */
- loglog(RC_CLASH, "the protocol must be the same for leftport and rightport");
- }
- else if (check_connection_end(&wm->right, &wm->left, wm)
- && check_connection_end(&wm->left, &wm->right, wm))
- {
- bool same_rightca, same_leftca;
- connection_t *c = malloc_thing(connection_t);
-
- zero(c);
- c->name = clone_str(wm->name);
- c->ikev1 = wm->ikev1;
- c->policy = wm->policy;
-
- if ((c->policy & POLICY_COMPRESS) && !can_do_IPcomp)
- {
- loglog(RC_COMMENT
- , "ignoring --compress in \"%s\" because kernel does not support IPCOMP"
- , c->name);
- }
-
- if (wm->esp)
- {
- DBG(DBG_CONTROL,
- DBG_log("from whack: got --esp=%s", wm->esp ? wm->esp: "NULL")
- )
- c->alg_info_esp = alg_info_esp_create_from_str(wm->esp? wm->esp : "");
-
- DBG(DBG_CRYPT|DBG_CONTROL,
- static char buf[BUF_LEN]="<NULL>";
-
- if (c->alg_info_esp)
- {
- alg_info_snprint(buf, sizeof(buf)
- ,(struct alg_info *)c->alg_info_esp);
- }
- DBG_log("esp proposal: %s", buf);
- )
- if (c->alg_info_esp)
- {
- if (c->alg_info_esp->alg_info_cnt == 0)
- {
- loglog(RC_LOG_SERIOUS, "got 0 esp transforms");
- }
- }
- else
- {
- loglog(RC_LOG_SERIOUS, "syntax error in esp string");
- }
- }
-
- if (wm->ike)
- {
- DBG(DBG_CONTROL,
- DBG_log("from whack: got --ike=%s", wm->ike ? wm->ike: "NULL")
- )
- c->alg_info_ike= alg_info_ike_create_from_str(wm->ike? wm->ike : "");
-
- DBG(DBG_CRYPT|DBG_CONTROL,
- static char buf[BUF_LEN]="<NULL>";
-
- if (c->alg_info_ike)
- {
- alg_info_snprint(buf, sizeof(buf)
- , (struct alg_info *)c->alg_info_ike);
- }
- DBG_log("ike proposal: %s", buf);
- )
- if (c->alg_info_ike)
- {
- if (c->alg_info_ike->alg_info_cnt == 0)
- {
- loglog(RC_LOG_SERIOUS, "got 0 ike transforms");
- }
- }
- else
- {
- loglog(RC_LOG_SERIOUS, "syntax error in ike string");
- }
- }
-
- if (wm->xauth_identity)
- {
- c->xauth_identity
- = identification_create_from_string(wm->xauth_identity);
- }
-
- c->sa_ike_life_seconds = wm->sa_ike_life_seconds;
- c->sa_ipsec_life_seconds = wm->sa_ipsec_life_seconds;
- c->sa_rekey_margin = wm->sa_rekey_margin;
- c->sa_rekey_fuzz = wm->sa_rekey_fuzz;
- c->sa_keying_tries = wm->sa_keying_tries;
-
- /* RFC 3706 DPD */
- c->dpd_delay = wm->dpd_delay;
- c->dpd_timeout = wm->dpd_timeout;
- c->dpd_action = wm->dpd_action;
-
- c->addr_family = wm->addr_family;
- c->tunnel_addr_family = wm->tunnel_addr_family;
-
- c->requested_ca = NULL;
- same_leftca = extract_end(&c->spd.this, &wm->left, wm->name, TRUE);
- same_rightca = extract_end(&c->spd.that, &wm->right, wm->name, FALSE);
-
- if (same_rightca && c->spd.this.ca)
- {
- c->spd.that.ca = c->spd.this.ca->clone(c->spd.this.ca);
- }
- else if (same_leftca && c->spd.that.ca)
- {
- c->spd.this.ca = c->spd.that.ca->clone(c->spd.that.ca);
- }
-
- default_end(&c->spd.this, &c->spd.that.host_addr);
- default_end(&c->spd.that, &c->spd.this.host_addr);
-
- /* force any wildcard host IP address, any wildcard subnet
- * or any wildcard ID to that end
- */
- if (isanyaddr(&c->spd.this.host_addr) || c->spd.this.has_client_wildcard
- || c->spd.this.has_port_wildcard || c->spd.this.has_id_wildcards
- || c->spd.this.allow_any)
- {
- struct end t = c->spd.this;
-
- c->spd.this = c->spd.that;
- c->spd.that = t;
- }
-
- c->spd.next = NULL;
- c->spd.reqid = wm->reqid ?: gen_reqid();
-
- c->spd.mark_in.value = wm->mark_in.value;
- c->spd.mark_in.mask = wm->mark_in.mask;
- c->spd.mark_out.value = wm->mark_out.value;
- c->spd.mark_out.mask = wm->mark_out.mask;
-
- /* set internal fields */
- c->instance_serial = 0;
- c->ac_next = connections;
- connections = c;
- c->interface = NULL;
- c->spd.routing = RT_UNROUTED;
- c->newest_isakmp_sa = SOS_NOBODY;
- c->newest_ipsec_sa = SOS_NOBODY;
- c->spd.eroute_owner = SOS_NOBODY;
-
- if (c->policy & POLICY_GROUP)
- {
- c->kind = CK_GROUP;
- add_group(c);
- }
- else if ((isanyaddr(&c->spd.that.host_addr) && !NEVER_NEGOTIATE(c->policy))
- || c->spd.that.has_client_wildcard || c->spd.that.has_port_wildcard
- || c->spd.that.has_id_wildcards || c->spd.that.allow_any)
- {
- /* Opportunistic or Road Warrior or wildcard client subnet
- * or wildcard ID */
- c->kind = CK_TEMPLATE;
- }
- else
- {
- c->kind = CK_PERMANENT;
- }
- set_policy_prio(c); /* must be after kind is set */
-
-#ifdef DEBUG
- c->extra_debugging = wm->debugging;
-#endif
-
- c->gw_info = NULL;
-
- passert(!(wm->left.virt && wm->right.virt));
- if (wm->left.virt || wm->right.virt)
- {
- passert(isanyaddr(&c->spd.that.host_addr));
- c->spd.that.virt = create_virtual(c,
- wm->left.virt ? wm->left.virt : wm->right.virt);
- if (c->spd.that.virt)
- c->spd.that.has_client = TRUE;
- }
-
- (void)orient(c);
-
- /* if rightsourceip defines a subnet then create an in-memory pool */
- if (whack_attr->add_pool(whack_attr, c->name,
- c->spd.this.is_left ? &wm->right : &wm->left))
- {
- c->spd.that.pool = clone_str(c->name);
- c->spd.that.modecfg = TRUE;
- c->spd.that.has_client = FALSE;
- /* reset the host_srcip so that it gets assigned in modecfg */
- DESTROY_IF(c->spd.that.host_srcip);
- c->spd.that.host_srcip = host_create_any(AF_INET);
- }
-
- if (c->ikev1)
- {
- connect_to_host_pair(c);
- }
-
- /* log all about this connection */
- plog("added connection description \"%s\"", c->name);
- DBG(DBG_CONTROL,
- char topo[BUF_LEN];
-
- (void) format_connection(topo, sizeof(topo), c, &c->spd);
-
- DBG_log("%s", topo);
-
- /* Make sure that address families can be correctly inferred
- * from printed ends.
- */
- passert(c->addr_family == addrtypeof(&c->spd.this.host_addr)
- && c->addr_family == addrtypeof(&c->spd.this.host_nexthop)
- && (c->spd.this.has_client? c->tunnel_addr_family : c->addr_family)
- == subnettypeof(&c->spd.this.client)
-
- && c->addr_family == addrtypeof(&c->spd.that.host_addr)
- && c->addr_family == addrtypeof(&c->spd.that.host_nexthop)
- && (c->spd.that.has_client? c->tunnel_addr_family : c->addr_family)
- == subnettypeof(&c->spd.that.client));
-
- DBG_log("ike_life: %lus; ipsec_life: %lus; rekey_margin: %lus;"
- " rekey_fuzz: %lu%%; keyingtries: %lu; policy: %s"
- , (unsigned long) c->sa_ike_life_seconds
- , (unsigned long) c->sa_ipsec_life_seconds
- , (unsigned long) c->sa_rekey_margin
- , (unsigned long) c->sa_rekey_fuzz
- , (unsigned long) c->sa_keying_tries
- , prettypolicy(c->policy));
- );
- }
-}
-
-/* Derive a template connection from a group connection and target.
- * Similar to instantiate(). Happens at whack --listen.
- * Returns name of new connection. May be NULL.
- * Caller is responsible for freeing.
- */
-char *add_group_instance(connection_t *group, const ip_subnet *target)
-{
- char namebuf[100], targetbuf[SUBNETTOT_BUF];
- connection_t *t;
- char *name = NULL;
-
- passert(group->kind == CK_GROUP);
- passert(oriented(*group));
-
- /* manufacture a unique name for this template */
- subnettot(target, 0, targetbuf, sizeof(targetbuf));
- snprintf(namebuf, sizeof(namebuf), "%s#%s", group->name, targetbuf);
-
- if (con_by_name(namebuf, FALSE) != NULL)
- {
- loglog(RC_DUPNAME, "group name + target yields duplicate name \"%s\""
- , namebuf);
- }
- else
- {
- t = clone_thing(*group);
- t->name = namebuf;
- unshare_connection_strings(t);
- name = clone_str(t->name);
- t->spd.that.client = *target;
- t->policy &= ~(POLICY_GROUP | POLICY_GROUTED);
- t->kind = isanyaddr(&t->spd.that.host_addr) && !NEVER_NEGOTIATE(t->policy)
- ? CK_TEMPLATE : CK_INSTANCE;
-
- /* reset log file info */
- t->log_file_name = NULL;
- t->log_file = NULL;
- t->log_file_err = FALSE;
-
- t->spd.reqid = gen_reqid();
-
- if (t->spd.that.virt)
- {
- DBG_log("virtual_ip not supported in group instance");
- t->spd.that.virt = NULL;
- }
-
- /* add to connections list */
- t->ac_next = connections;
- connections = t;
-
- /* same host_pair as parent: stick after parent on list */
- group->hp_next = t;
-
- /* route if group is routed */
- if (group->policy & POLICY_GROUTED)
- {
- if (!trap_connection(t))
- whack_log(RC_ROUTE, "could not route");
- }
- }
- return name;
-}
-
-/* an old target has disappeared for a group: delete instance */
-void remove_group_instance(const connection_t *group USED_BY_DEBUG,
- const char *name)
-{
- passert(group->kind == CK_GROUP);
- passert(oriented(*group));
-
- delete_connections_by_name(name, FALSE);
-}
-
-/* Common part of instantiating a Road Warrior or Opportunistic connection.
- * his_id can be used to carry over an ID discovered in Phase 1.
- * It must not disagree with the one in c, but if that is unspecified,
- * the new connection will use his_id.
- * If his_id is NULL, and c.that.id is uninstantiated (ID_ANY), the
- * new connection will continue to have an uninstantiated that.id.
- * Note: instantiation does not affect port numbers.
- *
- * Note that instantiate can only deal with a single SPD/eroute.
- */
-static connection_t *instantiate(connection_t *c, const ip_address *him,
- u_int16_t his_port, identification_t *his_id)
-{
- connection_t *d;
-
- passert(c->kind == CK_TEMPLATE);
- passert(c->spd.next == NULL);
-
- c->instance_serial++;
- d = clone_thing(*c);
- d->spd.that.allow_any = FALSE;
-
- if (his_id)
- {
- d->spd.that.id = his_id;
- d->spd.that.has_id_wildcards = FALSE;
- }
- unshare_connection_strings(d);
- if (d->spd.this.groups)
- {
- d->spd.this.groups = d->spd.this.groups->get_ref(d->spd.this.groups);
- }
- if (d->spd.that.groups)
- {
- d->spd.that.groups = d->spd.that.groups->get_ref(d->spd.that.groups);
- }
- d->kind = CK_INSTANCE;
-
- passert(oriented(*d));
- d->spd.that.host_addr = *him;
- setportof(htons(c->spd.that.port), &d->spd.that.host_addr);
-
- if (his_port) d->spd.that.host_port = his_port;
-
- default_end(&d->spd.that, &d->spd.this.host_addr);
-
- /* We cannot guess what our next_hop should be, but if it was
- * explicitly specified as 0.0.0.0, we set it to be him.
- * (whack will not allow nexthop to be elided in RW case.)
- */
- default_end(&d->spd.this, &d->spd.that.host_addr);
- d->spd.next = NULL;
- d->spd.reqid = gen_reqid();
-
- /* set internal fields */
- d->ac_next = connections;
- connections = d;
- d->spd.routing = RT_UNROUTED;
- d->newest_isakmp_sa = SOS_NOBODY;
- d->newest_ipsec_sa = SOS_NOBODY;
- d->spd.eroute_owner = SOS_NOBODY;
-
- /* reset log file info */
- d->log_file_name = NULL;
- d->log_file = NULL;
- d->log_file_err = FALSE;
-
- connect_to_host_pair(d);
-
- if (sameaddr(&d->spd.that.host_addr, &d->spd.this.host_nexthop))
- {
- d->spd.this.host_nexthop = *him;
- }
- return d;
-}
-
-connection_t *rw_instantiate(connection_t *c, const ip_address *him,
- u_int16_t his_port, const ip_subnet *his_net,
- identification_t *his_id)
-{
- connection_t *d = instantiate(c, him, his_port, his_id);
-
- if (d && his_net && is_virtual_connection(c))
- {
- d->spd.that.client = *his_net;
- d->spd.that.virt = NULL;
- if (subnetishost(his_net) && addrinsubnet(him, his_net))
- d->spd.that.has_client = FALSE;
- }
-
- if (d->policy & POLICY_OPPO)
- {
- /* This must be before we know the client addresses.
- * Fill in one that is impossible. This prevents anyone else from
- * trying to use this connection to get to a particular client
- */
- d->spd.that.client = *aftoinfo(subnettypeof(&d->spd.that.client))->none;
- }
- DBG(DBG_CONTROL
- , DBG_log("instantiated \"%s\" for %s" , d->name, ip_str(him)));
- return d;
-}
-
-#ifdef ADNS
-
-connection_t *oppo_instantiate(connection_t *c, const ip_address *him,
- identification_t *his_id, struct gw_info *gw,
- const ip_address *our_client USED_BY_DEBUG,
- const ip_address *peer_client)
-{
- connection_t *d = instantiate(c, him, 0, his_id);
-
- passert(d->spd.next == NULL);
-
- /* fill in our client side */
- if (d->spd.this.has_client)
- {
- /* there was a client in the abstract connection
- * so we demand that the required client is within that subnet.
- */
- passert(addrinsubnet(our_client, &d->spd.this.client));
- happy(addrtosubnet(our_client, &d->spd.this.client));
- /* opportunistic connections do not use port selectors */
- setportof(0, &d->spd.this.client.addr);
- }
- else
- {
- /* there was no client in the abstract connection
- * so we demand that the required client be the host
- */
- passert(sameaddr(our_client, &d->spd.this.host_addr));
- }
-
- /* fill in peer's client side.
- * If the client is the peer, excise the client from the connection.
- */
- passert((d->policy & POLICY_OPPO)
- && addrinsubnet(peer_client, &d->spd.that.client));
- happy(addrtosubnet(peer_client, &d->spd.that.client));
- /* opportunistic connections do not use port selectors */
- setportof(0, &d->spd.that.client.addr);
-
- if (sameaddr(peer_client, &d->spd.that.host_addr))
- d->spd.that.has_client = FALSE;
-
- passert(d->gw_info == NULL);
- gw_addref(gw);
- d->gw_info = gw;
-
- /* Adjust routing if something is eclipsing c.
- * It must be a %hold for us (hard to passert this).
- * If there was another instance eclipsing, we'd be using it.
- */
- if (c->spd.routing == RT_ROUTED_ECLIPSED)
- d->spd.routing = RT_ROUTED_PROSPECTIVE;
-
- /* Remember if the template is routed:
- * if so, this instance applies for initiation
- * even if it is created for responding.
- */
- if (routed(c->spd.routing))
- d->instance_initiation_ok = TRUE;
-
- DBG(DBG_CONTROL,
- char topo[BUF_LEN];
-
- (void) format_connection(topo, sizeof(topo), d, &d->spd);
- DBG_log("instantiated \"%s\": %s", d->name, topo);
- );
- return d;
-}
-
-#endif /* ADNS */
-
-/* priority formatting */
-void fmt_policy_prio(policy_prio_t pp, char buf[POLICY_PRIO_BUF])
-{
- if (pp == BOTTOM_PRIO)
- {
- snprintf(buf, POLICY_PRIO_BUF, "0");
- }
- else
- {
- snprintf(buf, POLICY_PRIO_BUF, "%lu,%lu"
- , pp>>16, (pp & ~(~(policy_prio_t)0 << 16)) >> 8);
- }
-}
-
-/* Format any information needed to identify an instance of a connection.
- * Fills any needed information into buf which MUST be big enough.
- * Road Warrior: peer's IP address
- * Opportunistic: [" " myclient "==="] " ..." peer ["===" hisclient] '\0'
- */
-static size_t fmt_client(const ip_subnet *client, const ip_address *gw,
- const char *prefix, char buf[ADDRTOT_BUF])
-{
- if (subnetisaddr(client, gw))
- {
- buf[0] = '\0'; /* compact denotation for "self" */
- }
- else
- {
- char *ap;
-
- strcpy(buf, prefix);
- ap = buf + strlen(prefix);
- if (subnetisnone(client))
- strcpy(ap, "?"); /* unknown */
- else
- subnettot(client, 0, ap, SUBNETTOT_BUF);
- }
- return strlen(buf);
-}
-
-void fmt_conn_instance(const connection_t *c, char buf[CONN_INST_BUF])
-{
- char *p = buf;
-
- *p = '\0';
-
- if (c->kind == CK_INSTANCE)
- {
- if (c->instance_serial != 0)
- {
- snprintf(p, CONN_INST_BUF, "[%lu]", c->instance_serial);
- p += strlen(p);
- }
-
- if (c->policy & POLICY_OPPO)
- {
- size_t w = fmt_client(&c->spd.this.client, &c->spd.this.host_addr, " ", p);
-
- p += w;
-
- strcpy(p, w == 0? " ..." : "=== ...");
- p += strlen(p);
-
- addrtot(&c->spd.that.host_addr, 0, p, ADDRTOT_BUF);
- p += strlen(p);
-
- (void) fmt_client(&c->spd.that.client, &c->spd.that.host_addr, "===", p);
- }
- else
- {
- *p++ = ' ';
- addrtot(&c->spd.that.host_addr, 0, p, ADDRTOT_BUF);
-#
- if (c->spd.that.host_port != pluto_port)
- {
- p += strlen(p);
- sprintf(p, ":%d", c->spd.that.host_port);
- }
- }
- }
-}
-
-/* Find an existing connection for a trapped outbound packet.
- * This is attempted before we bother with gateway discovery.
- * + this connection is routed or instance_of_routed_template
- * (i.e. approved for on-demand)
- * + this subnet contains our_client (or we are our_client)
- * + that subnet contains peer_client (or peer is peer_client)
- * + don't care about Phase 1 IDs (we don't know)
- * Note: result may still need to be instantiated.
- * The winner has the highest policy priority.
- *
- * If there are several with that priority, we give preference to
- * the first one that is an instance.
- *
- * See also build_outgoing_opportunistic_connection.
- */
-connection_t *find_connection_for_clients(struct spd_route **srp,
- const ip_address *our_client,
- const ip_address *peer_client,
- int transport_proto)
-{
- connection_t *c = connections, *best = NULL;
- policy_prio_t best_prio = BOTTOM_PRIO;
- struct spd_route *sr;
- struct spd_route *best_sr = NULL;
- int our_port = ntohs(portof(our_client));
- int peer_port = ntohs(portof(peer_client));
-
- passert(!isanyaddr(our_client) && !isanyaddr(peer_client));
-#ifdef DEBUG
- if (DBGP(DBG_CONTROL))
- {
- char ocb[ADDRTOT_BUF], pcb[ADDRTOT_BUF];
-
- addrtot(our_client, 0, ocb, sizeof(ocb));
- addrtot(peer_client, 0, pcb, sizeof(pcb));
- DBG_log("find_connection: "
- "looking for policy for connection: %s:%d/%d -> %s:%d/%d"
- , ocb, transport_proto, our_port, pcb, transport_proto, peer_port);
- }
-#endif /* DEBUG */
-
- for (c = connections; c != NULL; c = c->ac_next)
- {
- if (c->kind == CK_GROUP)
- {
- continue;
- }
-
- for (sr = &c->spd; best!=c && sr; sr = sr->next)
- {
- if ((routed(sr->routing) || c->instance_initiation_ok)
- && addrinsubnet(our_client, &sr->this.client)
- && addrinsubnet(peer_client, &sr->that.client)
- && addrinsubnet(peer_client, &sr->that.client)
- && (!sr->this.protocol || transport_proto == sr->this.protocol)
- && (!sr->this.port || our_port == sr->this.port)
- && (!sr->that.port || peer_port == sr->that.port))
- {
- char cib[CONN_INST_BUF];
- char cib2[CONN_INST_BUF];
-
- policy_prio_t prio = 8 * (c->prio + (c->kind == CK_INSTANCE))
- + 2 * (sr->this.port == our_port)
- + 2 * (sr->that.port == peer_port)
- + (sr->this.protocol == transport_proto);
-
-#ifdef DEBUG
- if (DBGP(DBG_CONTROL|DBG_CONTROLMORE))
- {
- char c_ocb[SUBNETTOT_BUF], c_pcb[SUBNETTOT_BUF];
-
- subnettot(&c->spd.this.client, 0, c_ocb, sizeof(c_ocb));
- subnettot(&c->spd.that.client, 0, c_pcb, sizeof(c_pcb));
- DBG_log("find_connection: conn \"%s\"%s has compatible peers: %s->%s [pri: %ld]"
- , c->name
- , (fmt_conn_instance(c, cib), cib)
- , c_ocb, c_pcb, prio);
- }
-#endif /* DEBUG */
-
- if (best == NULL)
- {
- best = c;
- best_sr = sr;
- best_prio = prio;
- }
-
- DBG(DBG_CONTROLMORE,
- DBG_log("find_connection: "
- "comparing best \"%s\"%s [pri:%ld]{%p} (child %s) to \"%s\"%s [pri:%ld]{%p} (child %s)"
- , best->name
- , (fmt_conn_instance(best, cib), cib)
- , best_prio
- , best
- , (best->policy_next ? best->policy_next->name : "none")
- , c->name
- , (fmt_conn_instance(c, cib2), cib2)
- , prio
- , c
- , (c->policy_next ? c->policy_next->name : "none")));
-
- if (prio > best_prio)
- {
- best = c;
- best_sr = sr;
- best_prio = prio;
- }
- }
- }
- }
-
- if (best && NEVER_NEGOTIATE(best->policy))
- {
- best = NULL;
- }
- if (srp && best)
- {
- *srp = best_sr;
- }
-
-#ifdef DEBUG
- if (DBGP(DBG_CONTROL))
- {
- if (best)
- {
- char cib[CONN_INST_BUF];
- DBG_log("find_connection: concluding with \"%s\"%s [pri:%ld]{%p} kind=%s"
- , best->name
- , (fmt_conn_instance(best, cib), cib)
- , best_prio
- , best
- , enum_name(&connection_kind_names, best->kind));
- } else {
- DBG_log("find_connection: concluding with empty");
- }
- }
-#endif /* DEBUG */
-
- return best;
-}
-
-#ifdef ADNS
-
-/* Find and instantiate a connection for an outgoing Opportunistic connection.
- * We've already discovered its gateway.
- * We look for a the connection such that:
- * + this is one of our interfaces
- * + this subnet contains our_client (or we are our_client)
- * (we will specialize the client). We prefer the smallest such subnet.
- * + that subnet contains peer_clent (we will specialize the client).
- * We prefer the smallest such subnet.
- * + is opportunistic
- * + that peer is NO_IP
- * + don't care about Phase 1 IDs (probably should be default)
- * We could look for a connection that already had the desired peer
- * (rather than NO_IP) specified, but it doesn't seem worth the
- * bother.
- *
- * We look for the routed policy applying to the narrowest subnets.
- * We only succeed if we find such a policy AND it is satisfactory.
- *
- * The body of the inner loop is a lot like that in
- * find_connection_for_clients. In this case, we know the gateways
- * that we need to instantiate an opportunistic connection.
- */
-connection_t *build_outgoing_opportunistic_connection(struct gw_info *gw,
- const ip_address *our_client,
- const ip_address *peer_client)
-{
- struct iface *p;
- connection_t *best = NULL;
- struct spd_route *sr, *bestsr;
- char ocb[ADDRTOT_BUF], pcb[ADDRTOT_BUF];
-
- addrtot(our_client, 0, ocb, sizeof(ocb));
- addrtot(peer_client, 0, pcb, sizeof(pcb));
-
- /* for each of our addresses... */
- for (p = interfaces; p != NULL; p = p->next)
- {
- /* go through those connections with our address and NO_IP as hosts
- * We cannot know what port the peer would use, so we assume
- * that it is pluto_port (makes debugging easier).
- */
- connection_t *c = find_host_pair_connections(&p->addr, pluto_port,
- (ip_address *)NULL, pluto_port);
-
- for (; c != NULL; c = c->hp_next)
- {
- DBG(DBG_OPPO,
- DBG_log("checking %s", c->name));
- if (c->kind == CK_GROUP)
- {
- continue;
- }
-
- for (sr = &c->spd; best!=c && sr; sr = sr->next)
- {
- if (routed(sr->routing)
- && addrinsubnet(our_client, &sr->this.client)
- && addrinsubnet(peer_client, &sr->that.client))
- {
- if (best == NULL)
- {
- best = c;
- break;
- }
-
- DBG(DBG_OPPO,
- DBG_log("comparing best %s to %s"
- , best->name, c->name));
-
- for (bestsr = &best->spd; best!=c && bestsr; bestsr=bestsr->next)
- {
- if (!subnetinsubnet(&bestsr->this.client, &sr->this.client)
- || (samesubnet(&bestsr->this.client, &sr->this.client)
- && !subnetinsubnet(&bestsr->that.client
- , &sr->that.client)))
- {
- best = c;
- }
- }
- }
- }
- }
- }
-
- if (best == NULL || NEVER_NEGOTIATE(best->policy) ||
- (best->policy & POLICY_OPPO) == LEMPTY || best->kind != CK_TEMPLATE)
- {
- return NULL;
- }
- else
- {
- chunk_t encoding = gw->gw_id->get_encoding(gw->gw_id);
- id_type_t type = gw->gw_id->get_type(gw->gw_id);
- ip_address ip_addr;
-
- initaddr(encoding.ptr, encoding.len,
- (type == ID_IPV4_ADDR) ? AF_INET : AF_INET6, &ip_addr);
-
- return oppo_instantiate(best, &ip_addr, NULL, gw, our_client, peer_client);
- }
-}
-
-#endif /* ADNS */
-
-bool orient(connection_t *c)
-{
- struct spd_route *sr;
-
- if (!oriented(*c))
- {
- struct iface *p;
-
- for (sr = &c->spd; sr; sr = sr->next)
- {
- /* Note: this loop does not stop when it finds a match:
- * it continues checking to catch any ambiguity.
- */
- for (p = interfaces; p != NULL; p = p->next)
- {
- if (p->ike_float)
- {
- continue;
- }
-
- for (;;)
- {
- /* check if this interface matches this end */
- if (sameaddr(&sr->this.host_addr, &p->addr)
- && sr->this.host_port == pluto_port)
- {
- if (oriented(*c))
- {
- if (c->interface == p)
- loglog(RC_LOG_SERIOUS
- , "both sides of \"%s\" are our interface %s!"
- , c->name, p->rname);
- else
- loglog(RC_LOG_SERIOUS, "two interfaces match \"%s\" (%s, %s)"
- , c->name, c->interface->rname, p->rname);
- c->interface = NULL; /* withdraw orientation */
- return FALSE;
- }
- c->interface = p;
- }
-
- /* done with this interface if it doesn't match that end */
- if (!(sameaddr(&sr->that.host_addr, &p->addr)
- && sr->that.host_port == pluto_port))
- break;
-
- /* swap ends and try again.
- * It is a little tricky to see that this loop will stop.
- * Only continue if the far side matches.
- * If both sides match, there is an error-out.
- */
- {
- struct end t = sr->this;
-
- sr->this = sr->that;
- sr->that = t;
- }
- }
- }
- }
- }
- return oriented(*c);
-}
-
-void initiate_connection(const char *name, int whackfd)
-{
- connection_t *c = con_by_name(name, TRUE);
-
- if (c && c->ikev1)
- {
- set_cur_connection(c);
- if (!oriented(*c))
- {
- loglog(RC_ORIENT, "we have no ipsecN interface for either end of this connection");
- }
- else if (NEVER_NEGOTIATE(c->policy))
- {
- loglog(RC_INITSHUNT
- , "cannot initiate an authby=never connection");
- }
- else if (c->kind != CK_PERMANENT && !c->spd.that.allow_any)
- {
- if (isanyaddr(&c->spd.that.host_addr))
- loglog(RC_NOPEERIP, "cannot initiate connection without knowing peer IP address");
- else
- loglog(RC_WILDCARD, "cannot initiate connection with ID wildcards");
- }
- else
- {
- /* do we have to prompt for a PIN code? */
- if (c->spd.this.sc && !c->spd.this.sc->valid && whackfd != NULL_FD)
- {
- scx_get_pin(c->spd.this.sc, whackfd);
- }
- if (c->spd.this.sc && !c->spd.this.sc->valid)
- {
- loglog(RC_NOVALIDPIN, "cannot initiate connection without valid PIN");
- }
- else
- {
-
- if (c->spd.that.allow_any)
- {
- c = instantiate(c, &c->spd.that.host_addr,
- c->spd.that.host_port, c->spd.that.id);
- }
-
- /* We will only request an IPsec SA if policy isn't empty
- * (ignoring Main Mode items).
- * This is a fudge, but not yet important.
- * If we are to proceed asynchronously, whackfd will be NULL_FD.
- */
- c->policy |= POLICY_UP;
- ipsecdoi_initiate(whackfd, c, c->policy, 1, SOS_NOBODY);
- whackfd = NULL_FD; /* protect from close */
- }
- }
- reset_cur_connection();
- }
- close_any(whackfd);
-}
-
-/* (Possibly) Opportunistic Initiation:
- * Knowing clients (single IP addresses), try to build an tunnel.
- * This may involve discovering a gateway and instantiating an
- * Opportunistic connection. Called when a packet is caught by
- * a %trap, or when whack --oppohere --oppothere is used.
- * It may turn out that an existing or non-opporunistic connnection
- * can handle the traffic.
- *
- * Most of the code will be restarted if an ADNS request is made
- * to discover the gateway. The only difference between the first
- * and second entry is whether gateways_from_dns is NULL or not.
- * initiate_opportunistic: initial entrypoint
- * continue_oppo: where we pickup when ADNS result arrives
- * initiate_opportunistic_body: main body shared by above routines
- * cannot_oppo: a helper function to log a diagnostic
- * This structure repeats a lot of code when the ADNS result arrives.
- * This seems like a waste, but anything learned the first time through
- * may no longer be true!
- *
- * After the first IKE message is sent, the regular state machinery
- * carries negotiation forward.
- */
-
-enum find_oppo_step {
- fos_start,
- fos_myid_ip_txt,
- fos_myid_hostname_txt,
- fos_myid_ip_key,
- fos_myid_hostname_key,
- fos_our_client,
- fos_our_txt,
-#ifdef USE_KEYRR
- fos_our_key,
-#endif /* USE_KEYRR */
- fos_his_client,
- fos_done
-};
-
-#ifdef DEBUG
-static const char *const oppo_step_name[] = {
- "fos_start",
- "fos_myid_ip_txt",
- "fos_myid_hostname_txt",
- "fos_myid_ip_key",
- "fos_myid_hostname_key",
- "fos_our_client",
- "fos_our_txt",
-#ifdef USE_KEYRR
- "fos_our_key",
-#endif /* USE_KEYRR */
- "fos_his_client",
- "fos_done"
-};
-#endif /* DEBUG */
-
-struct find_oppo_bundle {
- enum find_oppo_step step;
- err_t want;
- bool failure_ok; /* if true, continue_oppo should not die on DNS failure */
- ip_address our_client; /* not pointer! */
- ip_address peer_client;
- int transport_proto;
- bool held;
- policy_prio_t policy_prio;
- ipsec_spi_t failure_shunt; /* in host order! 0 for delete. */
- int whackfd;
-};
-
-struct find_oppo_continuation {
- struct adns_continuation ac; /* common prefix */
- struct find_oppo_bundle b;
-};
-
-static void cannot_oppo(connection_t *c, struct find_oppo_bundle *b, err_t ugh)
-{
- char pcb[ADDRTOT_BUF];
- char ocb[ADDRTOT_BUF];
-
- addrtot(&b->peer_client, 0, pcb, sizeof(pcb));
- addrtot(&b->our_client, 0, ocb, sizeof(ocb));
-
- DBG(DBG_DNS | DBG_OPPO, DBG_log("Can't Opportunistically initiate for %s to %s: %s"
- , ocb, pcb, ugh));
-
- whack_log(RC_OPPOFAILURE
- , "Can't Opportunistically initiate for %s to %s: %s"
- , ocb, pcb, ugh);
-
- if (c && c->policy_next)
- {
- /* there is some policy that comes afterwards */
- struct spd_route *shunt_spd;
- connection_t *nc = c->policy_next;
- struct state *st;
-
- passert(c->kind == CK_TEMPLATE);
- passert(c->policy_next->kind == CK_PERMANENT);
-
- DBG(DBG_OPPO, DBG_log("OE failed for %s to %s, but %s overrides shunt"
- , ocb, pcb, c->policy_next->name));
-
- /*
- * okay, here we need add to the "next" policy, which is ought
- * to be an instance.
- * We will add another entry to the spd_route list for the specific
- * situation that we have.
- */
-
- shunt_spd = clone_thing(nc->spd);
-
- shunt_spd->next = nc->spd.next;
- nc->spd.next = shunt_spd;
-
- happy(addrtosubnet(&b->peer_client, &shunt_spd->that.client));
-
- if (sameaddr(&b->peer_client, &shunt_spd->that.host_addr))
- shunt_spd->that.has_client = FALSE;
-
- /*
- * override the tunnel destination with the one from the secondaried
- * policy
- */
- shunt_spd->that.host_addr = nc->spd.that.host_addr;
-
- /* now, lookup the state, and poke it up.
- */
-
- st = state_with_serialno(nc->newest_ipsec_sa);
-
- /* XXX what to do if the IPSEC SA has died? */
- passert(st != NULL);
-
- /* link the new connection instance to the state's list of
- * connections
- */
-
- DBG(DBG_OPPO, DBG_log("installing state: %ld for %s to %s"
- , nc->newest_ipsec_sa
- , ocb, pcb));
-
-#ifdef DEBUG
- if (DBGP(DBG_OPPO | DBG_CONTROLMORE))
- {
- char state_buf[LOG_WIDTH];
- char state_buf2[LOG_WIDTH];
- time_t n = now();
-
- fmt_state(FALSE, st, n
- , state_buf, sizeof(state_buf)
- , state_buf2, sizeof(state_buf2));
- DBG_log("cannot_oppo, failure SA1: %s", state_buf);
- DBG_log("cannot_oppo, failure SA2: %s", state_buf2);
- }
-#endif /* DEBUG */
-
- if (!route_and_eroute(c, shunt_spd, st))
- {
- whack_log(RC_OPPOFAILURE
- , "failed to instantiate shunt policy %s for %s to %s"
- , c->name
- , ocb, pcb);
- }
- return;
- }
-}
-
-static void initiate_opportunistic_body(struct find_oppo_bundle *b
- , struct adns_continuation *ac, err_t ac_ugh); /* forward */
-
-void initiate_opportunistic(const ip_address *our_client,
- const ip_address *peer_client, int transport_proto,
- bool held, int whackfd)
-{
- struct find_oppo_bundle b;
-
- b.want = (whackfd == NULL_FD ? "whack" : "acquire");
- b.failure_ok = FALSE;
- b.our_client = *our_client;
- b.peer_client = *peer_client;
- b.transport_proto = transport_proto;
- b.held = held;
- b.policy_prio = BOTTOM_PRIO;
- b.failure_shunt = 0;
- b.whackfd = whackfd;
- b.step = fos_start;
- initiate_opportunistic_body(&b, NULL, NULL);
-}
-
-#ifdef ADNS
-
-static void continue_oppo(struct adns_continuation *acr, err_t ugh)
-{
- struct find_oppo_continuation *cr = (void *)acr; /* inherit, damn you! */
- connection_t *c;
- bool was_held = cr->b.held;
- int whackfd = cr->b.whackfd;
-
- /* note: cr->id has no resources; cr->sgw_id is ID_ANY:
- * neither need freeing.
- */
- whack_log_fd = whackfd;
-
-#ifdef DEBUG
- /* if we're going to ignore the error, at least note it in debugging log */
- if (cr->b.failure_ok && ugh)
- {
- DBG(DBG_CONTROL | DBG_DNS,
- {
- char ocb[ADDRTOT_BUF];
- char pcb[ADDRTOT_BUF];
-
- addrtot(&cr->b.our_client, 0, ocb, sizeof(ocb));
- addrtot(&cr->b.peer_client, 0, pcb, sizeof(pcb));
- DBG_log("continuing from failed DNS lookup for %s, %s to %s: %s"
- , cr->b.want, ocb, pcb, ugh);
- });
- }
-#endif
-
- if (!cr->b.failure_ok && ugh)
- {
- c = find_connection_for_clients(NULL, &cr->b.our_client, &cr->b.peer_client
- , cr->b.transport_proto);
- cannot_oppo(c, &cr->b
- , builddiag("%s: %s", cr->b.want, ugh));
- }
- else if (was_held && !cr->b.held)
- {
- /* was_held indicates we were started due to a %trap firing
- * (as opposed to a "whack --oppohere --oppothere").
- * Since the %hold has gone, we can assume that somebody else
- * has beaten us to the punch. We can go home. But lets log it.
- */
- char ocb[ADDRTOT_BUF];
- char pcb[ADDRTOT_BUF];
-
- addrtot(&cr->b.our_client, 0, ocb, sizeof(ocb));
- addrtot(&cr->b.peer_client, 0, pcb, sizeof(pcb));
-
- loglog(RC_COMMENT
- , "%%hold otherwise handled during DNS lookup for Opportunistic Initiation for %s to %s"
- , ocb, pcb);
- }
- else
- {
- initiate_opportunistic_body(&cr->b, &cr->ac, ugh);
- whackfd = NULL_FD; /* was handed off */
- }
-
- whack_log_fd = NULL_FD;
- close_any(whackfd);
-}
-
-#endif /* ADNS */
-
-#ifdef USE_KEYRR
-static err_t check_key_recs(enum myid_state try_state, const connection_t *c,
- struct adns_continuation *ac)
-{
- /* Check if KEY lookup yielded good results.
- * Looking up based on our ID. Used if
- * client is ourself, or if TXT had no public key.
- * Note: if c is different this time, there is
- * a chance that we did the wrong query.
- * If so, treat as a kind of failure.
- */
- enum myid_state old_myid_state = myid_state;
- private_key_t *private;
- err_t ugh = NULL;
-
- myid_state = try_state;
-
- if (old_myid_state != myid_state && old_myid_state == MYID_SPECIFIED)
- {
- ugh = "%myid was specified while we were guessing";
- }
- else if ((private = get_private_key(c)) == NULL)
- {
- ugh = "we don't know our own RSA key";
- }
- else if (!same_id(&ac->id, &c->spd.this.id))
- {
- ugh = "our ID changed underfoot";
- }
- else
- {
- /* Similar to code in RSA_check_signature
- * for checking the other side.
- */
- pubkey_list_t *kr;
-
- ugh = "no KEY RR found for us";
- for (kr = ac->keys_from_dns; kr != NULL; kr = kr->next)
- {
- ugh = "all our KEY RRs have the wrong public key";
- if (kr->key->alg == PUBKEY_ALG_RSA
- && private->belongs_to(private, &kr->key->public_key))
- {
- ugh = NULL; /* good! */
- break;
- }
- }
- }
- if (ugh)
- {
- myid_state = old_myid_state;
- }
- return ugh;
-}
-#endif /* USE_KEYRR */
-
-#ifdef ADNS
-
-static err_t check_txt_recs(enum myid_state try_state, const connection_t *c,
- struct adns_continuation *ac)
-{
- /* Check if TXT lookup yielded good results.
- * Looking up based on our ID. Used if
- * client is ourself, or if TXT had no public key.
- * Note: if c is different this time, there is
- * a chance that we did the wrong query.
- * If so, treat as a kind of failure.
- */
- enum myid_state old_myid_state = myid_state;
- private_key_t *private;
- err_t ugh = NULL;
-
- myid_state = try_state;
-
- if (old_myid_state != myid_state
- && old_myid_state == MYID_SPECIFIED)
- {
- ugh = "%myid was specified while we were guessing";
- }
- else if ((private = get_private_key(c)) == NULL)
- {
- ugh = "we don't know our own RSA key";
- }
- else if (!ac->id->equals(ac->id, c->spd.this.id))
- {
- ugh = "our ID changed underfoot";
- }
- else
- {
- /* Similar to code in RSA_check_signature
- * for checking the other side.
- */
- struct gw_info *gwp;
-
- ugh = "no TXT RR found for us";
- for (gwp = ac->gateways_from_dns; gwp != NULL; gwp = gwp->next)
- {
- public_key_t *pub_key = gwp->key->public_key;
-
- ugh = "all our TXT RRs have the wrong public key";
- if (pub_key->get_type(pub_key) == KEY_RSA &&
- private->belongs_to(private, pub_key))
- {
- ugh = NULL; /* good! */
- break;
- }
- }
- }
- if (ugh)
- {
- myid_state = old_myid_state;
- }
- return ugh;
-}
-
-#endif /* ADNS */
-
-
-/* note: gateways_from_dns must be NULL iff this is the first call */
-static void initiate_opportunistic_body(struct find_oppo_bundle *b,
- struct adns_continuation *ac,
- err_t ac_ugh)
-{
- connection_t *c;
- struct spd_route *sr;
-
- /* What connection shall we use?
- * First try for one that explicitly handles the clients.
- */
- DBG(DBG_CONTROL,
- {
- char ours[ADDRTOT_BUF];
- char his[ADDRTOT_BUF];
- int ourport;
- int hisport;
-
- addrtot(&b->our_client, 0, ours, sizeof(ours));
- addrtot(&b->peer_client, 0, his, sizeof(his));
- ourport = ntohs(portof(&b->our_client));
- hisport = ntohs(portof(&b->peer_client));
- DBG_log("initiate on demand from %s:%d to %s:%d proto=%d state: %s because: %s"
- , ours, ourport, his, hisport, b->transport_proto
- , oppo_step_name[b->step], b->want);
- });
- if (isanyaddr(&b->our_client) || isanyaddr(&b->peer_client))
- {
- cannot_oppo(NULL, b, "impossible IP address");
- }
- else if ((c = find_connection_for_clients(&sr
- , &b->our_client
- , &b->peer_client
- , b->transport_proto)) == NULL)
- {
- /* No connection explicitly handles the clients and there
- * are no Opportunistic connections -- whine and give up.
- * The failure policy cannot be gotten from a connection; we pick %pass.
- */
- cannot_oppo(NULL, b, "no routed Opportunistic template covers this pair");
- }
- else if (c->kind != CK_TEMPLATE)
- {
- /* We've found a connection that can serve.
- * Do we have to initiate it?
- * Not if there is currently an IPSEC SA.
- * But if there is an IPSEC SA, then the kernel would not
- * have generated the acquire. So we assume that there isn't one.
- * This may be redundant if a non-opportunistic
- * negotiation is already being attempted.
- */
-
- /* If we are to proceed asynchronously, b->whackfd will be NULL_FD. */
-
- if(c->kind == CK_INSTANCE)
- {
- char cib[CONN_INST_BUF];
- /* there is already an instance being negotiated, no nothing */
- DBG(DBG_CONTROL, DBG_log("found existing instance \"%s\"%s, rekeying it"
- , c->name
- , (fmt_conn_instance(c, cib), cib)));
- /* XXX-mcr - return; */
- }
-
- /* otherwise, there is some kind of static conn that can handle
- * this connection, so we initiate it */
-
- if (b->held)
- {
- /* what should we do on failure? */
- (void) assign_hold(c, sr, b->transport_proto, &b->our_client, &b->peer_client);
- }
- ipsecdoi_initiate(b->whackfd, c, c->policy, 1, SOS_NOBODY);
- b->whackfd = NULL_FD; /* protect from close */
- }
-#ifdef ADNS
- else
- {
- /* We are handling an opportunistic situation.
- * This involves several DNS lookup steps that require suspension.
- * Note: many facts might change while we're suspended.
- * Here be dragons.
- *
- * The first chunk of code handles the result of the previous
- * DNS query (if any). It also selects the kind of the next step.
- * The second chunk initiates the next DNS query (if any).
- */
- enum find_oppo_step next_step = fos_myid_ip_txt;
- err_t ugh = ac_ugh;
- char mycredentialstr[BUF_LEN];
- char cib[CONN_INST_BUF];
-
- DBG(DBG_CONTROL, DBG_log("creating new instance from \"%s\"%s",
- c->name, (fmt_conn_instance(c, cib), cib)));
- snprintf(mycredentialstr, BUF_LEN, "%Y", sr->this.id);
-
- /* handle any DNS answer; select next step */
- switch (b->step)
- {
- case fos_start:
- /* just starting out: select first query step */
- next_step = fos_myid_ip_txt;
- break;
-
- case fos_myid_ip_txt: /* TXT for our default IP address as %myid */
- ugh = check_txt_recs(MYID_IP, c, ac);
- if (ugh)
- {
- /* cannot use our IP as OE identitiy for initiation */
- DBG(DBG_OPPO,
- DBG_log("can not use our IP (%Y:TXT) as identity: %s",
- myids[MYID_IP], ugh));
- if (!logged_myid_ip_txt_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "can not use our IP (%Y:TXT) as identity: %s",
- myids[MYID_IP], ugh);
- logged_myid_ip_txt_warning = TRUE;
- }
-
- next_step = fos_myid_hostname_txt;
- ugh = NULL; /* failure can be recovered from */
- }
- else
- {
- /* we can use our IP as OE identity for initiation */
- if (!logged_myid_ip_txt_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "using our IP (%Y:TXT) as identity!",
- myids[MYID_IP]);
- logged_myid_ip_txt_warning = TRUE;
- }
-
- next_step = fos_our_client;
- }
- break;
-
- case fos_myid_hostname_txt: /* TXT for our hostname as %myid */
- ugh = check_txt_recs(MYID_HOSTNAME, c, ac);
- if (ugh)
- {
- /* cannot use our hostname as OE identitiy for initiation */
- DBG(DBG_OPPO,
- DBG_log("can not use our hostname (%Y:TXT) as identity: %s",
- myids[MYID_HOSTNAME], ugh));
- if (!logged_myid_fqdn_txt_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "can not use our hostname (%Y:TXT) as identity: %s",
- myids[MYID_HOSTNAME], ugh);
- logged_myid_fqdn_txt_warning = TRUE;
- }
-#ifdef USE_KEYRR
- next_step = fos_myid_ip_key;
- ugh = NULL; /* failure can be recovered from */
-#endif
- }
- else
- {
- /* we can use our hostname as OE identity for initiation */
- if (!logged_myid_fqdn_txt_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "using our hostname (%Y:TXT) as identity!",
- myids[MYID_HOSTNAME]);
- logged_myid_fqdn_txt_warning = TRUE;
- }
- next_step = fos_our_client;
- }
- break;
-
-#ifdef USE_KEYRR
- case fos_myid_ip_key: /* KEY for our default IP address as %myid */
- ugh = check_key_recs(MYID_IP, c, ac);
- if (ugh)
- {
- /* cannot use our IP as OE identitiy for initiation */
- DBG(DBG_OPPO,
- DBG_log("can not use our IP (%Y:KEY) as identity: %s",
- myids[MYID_IP], ugh));
- if (!logged_myid_ip_key_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "can not use our IP (%Y:KEY) as identity: %s",
- myids[MYID_IP], ugh);
- logged_myid_ip_key_warning = TRUE;
- }
-
- next_step = fos_myid_hostname_key;
- ugh = NULL; /* failure can be recovered from */
- }
- else
- {
- /* we can use our IP as OE identity for initiation */
- if (!logged_myid_ip_key_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "using our IP (%Y:KEY) as identity!",
- myids[MYID_IP]);
- logged_myid_ip_key_warning = TRUE;
- }
- next_step = fos_our_client;
- }
- break;
-
- case fos_myid_hostname_key: /* KEY for our hostname as %myid */
- ugh = check_key_recs(MYID_HOSTNAME, c, ac);
- if (ugh)
- {
- /* cannot use our IP as OE identitiy for initiation */
- DBG(DBG_OPPO,
- DBG_log("can not use our hostname (%Y:KEY) as identity: %s",
- myids[MYID_HOSTNAME], ugh));
- if (!logged_myid_fqdn_key_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "can not use our hostname (%Y:KEY) as identity: %s",
- myids[MYID_HOSTNAME], ugh);
- logged_myid_fqdn_key_warning = TRUE;
- }
- next_step = fos_myid_hostname_key;
- ugh = NULL; /* failure can be recovered from */
- }
- else
- {
- /* we can use our IP as OE identity for initiation */
- if (!logged_myid_fqdn_key_warning)
- {
- loglog(RC_LOG_SERIOUS,
- "using our hostname (%Y:KEY) as identity!",
- myids[MYID_HOSTNAME]);
- logged_myid_fqdn_key_warning = TRUE;
- }
- next_step = fos_our_client;
- }
- break;
-#endif
-
- case fos_our_client: /* TXT for our client */
- {
- /* Our client is not us: we must check the TXT records.
- * Note: if c is different this time, there is
- * a chance that we did the wrong query.
- * If so, treat as a kind of failure.
- */
- private_key_t *private = get_private_key(c);
-
- next_step = fos_his_client; /* normal situation */
-
- if (private == NULL)
- {
- ugh = "we don't know our own RSA key";
- }
- else if (sameaddr(&sr->this.host_addr, &b->our_client))
- {
- /* this wasn't true when we started -- bail */
- ugh = "our IP address changed underfoot";
- }
- else if (!ac->sgw_id->equals(ac->sgw_id, sr->this.id))
- {
- /* this wasn't true when we started -- bail */
- ugh = "our ID changed underfoot";
- }
- else
- {
- /* Similar to code in quick_inI1_outR1_tail
- * for checking the other side.
- */
- struct gw_info *gwp;
-
- ugh = "no TXT RR for our client delegates us";
- for (gwp = ac->gateways_from_dns; gwp != NULL; gwp = gwp->next)
- {
- ugh = "TXT RR for our client has wrong key";
- /* If there is a key from the TXT record,
- * we count it as a win if we match the key.
- * If there was no key, we have a tentative win:
- * we need to check our KEY record to be sure.
- */
- if (!gwp->gw_key_present)
- {
- /* Success, but the TXT had no key
- * so we must check our our own KEY records.
- */
- next_step = fos_our_txt;
- ugh = NULL; /* good! */
- break;
- }
- if (private->belongs_to(private, gwp->key->public_key))
- {
- ugh = NULL; /* good! */
- break;
- }
- }
- }
- }
- break;
-
- case fos_our_txt: /* TXT for us */
- {
- /* Check if TXT lookup yielded good results.
- * Looking up based on our ID. Used if
- * client is ourself, or if TXT had no public key.
- * Note: if c is different this time, there is
- * a chance that we did the wrong query.
- * If so, treat as a kind of failure.
- */
- private_key_t *private = get_private_key(c);
-
- next_step = fos_his_client; /* unless we decide to look for KEY RR */
-
- if (private == NULL)
- {
- ugh = "we don't know our own RSA key";
- }
- else if (!ac->id->equals(ac->id, c->spd.this.id))
- {
- ugh = "our ID changed underfoot";
- }
- else
- {
- /* Similar to code in RSA_check_signature
- * for checking the other side.
- */
- struct gw_info *gwp;
-
- ugh = "no TXT RR for us";
- for (gwp = ac->gateways_from_dns; gwp != NULL; gwp = gwp->next)
- {
- ugh = "TXT RR for us has wrong key";
- if (gwp->gw_key_present &&
- private->belongs_to(private, gwp->key->public_key))
- {
- DBG(DBG_CONTROL,
- DBG_log("initiate on demand found TXT with right public key at: %s"
- , mycredentialstr));
- ugh = NULL;
- break;
- }
- }
-#ifdef USE_KEYRR
- if (ugh)
- {
- /* if no TXT with right key, try KEY */
- DBG(DBG_CONTROL,
- DBG_log("will try for KEY RR since initiate on demand found %s: %s"
- , ugh, mycredentialstr));
- next_step = fos_our_key;
- ugh = NULL;
- }
-#endif
- }
- }
- break;
-
-#ifdef USE_KEYRR
- case fos_our_key: /* KEY for us */
- {
- /* Check if KEY lookup yielded good results.
- * Looking up based on our ID. Used if
- * client is ourself, or if TXT had no public key.
- * Note: if c is different this time, there is
- * a chance that we did the wrong query.
- * If so, treat as a kind of failure.
- */
- private_key_t *private = get_private_key(c);
-
- next_step = fos_his_client; /* always */
-
- if (private == NULL)
- {
- ugh = "we don't know our own RSA key";
- }
- else if (!same_id(&ac->id, &c->spd.this.id))
- {
- ugh = "our ID changed underfoot";
- }
- else
- {
- /* Similar to code in RSA_check_signature
- * for checking the other side.
- */
- pubkey_list_t *kr;
-
- ugh = "no KEY RR found for us (and no good TXT RR)";
- for (kr = ac->keys_from_dns; kr != NULL; kr = kr->next)
- {
- ugh = "all our KEY RRs have the wrong public key (and no good TXT RR)";
- if (kr->key->alg == PUBKEY_ALG_RSA
- && private->belongs_to(private, kr->key->public_key))
- {
- /* do this only once a day */
- if (!logged_txt_warning)
- {
- loglog(RC_LOG_SERIOUS
- , "found KEY RR but not TXT RR for %s. See http://www.freeswan.org/err/txt-change.html."
- , mycredentialstr);
- logged_txt_warning = TRUE;
- }
- ugh = NULL; /* good! */
- break;
- }
- }
- }
- }
- break;
-#endif /* USE_KEYRR */
-
- case fos_his_client: /* TXT for his client */
- {
- /* We've finished last DNS queries: TXT for his client.
- * Using the information, try to instantiate a connection
- * and start negotiating.
- * We now know the peer. The chosing of "c" ignored this,
- * so we will disregard its current value.
- * !!! We need to randomize the entry in gw that we choose.
- */
- next_step = fos_done; /* no more queries */
-
- c = build_outgoing_opportunistic_connection(ac->gateways_from_dns
- , &b->our_client
- , &b->peer_client);
-
- if (c == NULL)
- {
- /* We cannot seem to instantiate a suitable connection:
- * complain clearly.
- */
- char ocb[ADDRTOT_BUF], pcb[ADDRTOT_BUF];
-
- addrtot(&b->our_client, 0, ocb, sizeof(ocb));
- addrtot(&b->peer_client, 0, pcb, sizeof(pcb));
- loglog(RC_OPPOFAILURE,
- "no suitable connection for opportunism "
- "between %s and %s with %Y as peer",
- ocb, pcb, ac->gateways_from_dns->gw_id);
- }
- else
- {
- /* If we are to proceed asynchronously, b->whackfd will be NULL_FD. */
- passert(c->kind == CK_INSTANCE);
- passert(c->gw_info != NULL);
- passert(HAS_IPSEC_POLICY(c->policy));
- passert(LHAS(LELEM(RT_UNROUTED) | LELEM(RT_ROUTED_PROSPECTIVE), c->spd.routing));
- if (b->held)
- {
- /* what should we do on failure? */
- (void) assign_hold(c, &c->spd
- , b->transport_proto
- , &b->our_client, &b->peer_client);
- }
- c->gw_info->key->last_tried_time = now();
- ipsecdoi_initiate(b->whackfd, c, c->policy, 1, SOS_NOBODY);
- b->whackfd = NULL_FD; /* protect from close */
- }
- }
- break;
-
- default:
- bad_case(b->step);
- }
-
- /* the second chunk: initiate the next DNS query (if any) */
- DBG(DBG_CONTROL,
- {
- char ours[ADDRTOT_BUF];
- char his[ADDRTOT_BUF];
-
- addrtot(&b->our_client, 0, ours, sizeof(ours));
- addrtot(&b->peer_client, 0, his, sizeof(his));
- DBG_log("initiate on demand from %s to %s new state: %s with ugh: %s"
- , ours, his, oppo_step_name[b->step], ugh ? ugh : "ok");
- });
-
- if (ugh)
- {
- b->policy_prio = c->prio;
- b->failure_shunt = shunt_policy_spi(c, FALSE);
- cannot_oppo(c, b, ugh);
- }
- else if (next_step == fos_done)
- {
- /* nothing to do */
- }
- else
- {
- /* set up the next query */
- struct find_oppo_continuation *cr = malloc_thing(struct find_oppo_continuation);
- identification_t *id;
-
- b->policy_prio = c->prio;
- b->failure_shunt = shunt_policy_spi(c, FALSE);
- cr->b = *b; /* copy; start hand off of whackfd */
- cr->b.failure_ok = FALSE;
- cr->b.step = next_step;
-
- for (sr = &c->spd
- ; sr!=NULL && !sameaddr(&sr->this.host_addr, &b->our_client)
- ; sr = sr->next)
- ;
-
- if (sr == NULL)
- sr = &c->spd;
-
- /* If a %hold shunt has replaced the eroute for this template,
- * record this fact.
- */
- if (b->held
- && sr->routing == RT_ROUTED_PROSPECTIVE && eclipsable(sr))
- {
- sr->routing = RT_ROUTED_ECLIPSED;
- eclipse_count++;
- }
-
- /* Switch to issue next query.
- * A case may turn out to be unnecessary. If so, it falls
- * through to the next case.
- * Figuring out what %myid can stand for must be done before
- * our client credentials are looked up: we must know what
- * the client credentials may use to identify us.
- * On the other hand, our own credentials should be looked
- * up after our clients in case our credentials are not
- * needed at all.
- * XXX this is a wasted effort if we don't have credentials
- * BUT they are not needed.
- */
- switch (next_step)
- {
- case fos_myid_ip_txt:
- if (c->spd.this.id->get_type(c->spd.this.id) == ID_MYID
- && myid_state != MYID_SPECIFIED)
- {
- cr->b.failure_ok = TRUE;
- cr->b.want = b->want = "TXT record for IP address as %myid";
- ugh = start_adns_query(myids[MYID_IP], myids[MYID_IP],
- T_TXT, continue_oppo, &cr->ac);
- break;
- }
- cr->b.step = fos_myid_hostname_txt;
- /* fall through */
-
- case fos_myid_hostname_txt:
- if (c->spd.this.id->get_type(c->spd.this.id) == ID_MYID
- && myid_state != MYID_SPECIFIED)
- {
-#ifdef USE_KEYRR
- cr->b.failure_ok = TRUE;
-#else
- cr->b.failure_ok = FALSE;
-#endif
- cr->b.want = b->want = "TXT record for hostname as %myid";
- ugh = start_adns_query(myids[MYID_HOSTNAME],
- myids[MYID_HOSTNAME],
- T_TXT, continue_oppo, &cr->ac);
- break;
- }
-
-#ifdef USE_KEYRR
- cr->b.step = fos_myid_ip_key;
- /* fall through */
-
- case fos_myid_ip_key:
- if (c->spd.this.id.kind == ID_MYID
- && myid_state != MYID_SPECIFIED)
- {
- cr->b.failure_ok = TRUE;
- cr->b.want = b->want = "KEY record for IP address as %myid (no good TXT)";
- ugh = start_adns_query(myids[MYID_IP], NULL, /* security gateway meaningless */
- T_KEY, continue_oppo, &cr->ac);
- break;
- }
- cr->b.step = fos_myid_hostname_key;
- /* fall through */
-
- case fos_myid_hostname_key:
- if (c->spd.this.id.kind == ID_MYID
- && myid_state != MYID_SPECIFIED)
- {
- cr->b.failure_ok = FALSE; /* last attempt! */
- cr->b.want = b->want = "KEY record for hostname as %myid (no good TXT)";
- ugh = start_adns_query(myids[MYID_HOSTNAME], NULL, /* security gateway meaningless */
- T_KEY, continue_oppo, &cr->ac);
- break;
- }
-#endif
- cr->b.step = fos_our_client;
- /* fall through */
-
- case fos_our_client: /* TXT for our client */
- if (!sameaddr(&c->spd.this.host_addr, &b->our_client))
- {
- /* Check that at least one TXT(reverse(b->our_client)) is workable.
- * Note: {unshare|free}_id_content not needed for id: ephemeral.
- */
- cr->b.want = b->want = "our client's TXT record";
- id = identification_create_from_sockaddr((sockaddr_t*)&b->our_client);
- ugh = start_adns_query(id, c->spd.this.id, /* we are the security gateway */
- T_TXT, continue_oppo, &cr->ac);
- id->destroy(id);
- break;
- }
- cr->b.step = fos_our_txt;
- /* fall through */
-
- case fos_our_txt: /* TXT for us */
- cr->b.failure_ok = b->failure_ok = TRUE;
- cr->b.want = b->want = "our TXT record";
- ugh = start_adns_query(sr->this.id, sr->this.id, /* we are the security gateway */
- T_TXT, continue_oppo, &cr->ac);
- break;
-
-#ifdef USE_KEYRR
- case fos_our_key: /* KEY for us */
- cr->b.want = b->want = "our KEY record";
- cr->b.failure_ok = b->failure_ok = FALSE;
- ugh = start_adns_query(sr->this.id, NULL, /* security gateway meaningless */
- T_KEY, continue_oppo, &cr->ac);
- break;
-#endif /* USE_KEYRR */
-
- case fos_his_client: /* TXT for his client */
- /* note: {unshare|free}_id_content not needed for id: ephemeral */
- cr->b.want = b->want = "target's TXT record";
- cr->b.failure_ok = b->failure_ok = FALSE;
- id = identification_create_from_sockaddr((sockaddr_t*)&b->peer_client);
- ugh = start_adns_query(id, NULL, /* security gateway unconstrained */
- T_TXT, continue_oppo, &cr->ac);
- id->destroy(id);
- break;
-
- default:
- bad_case(next_step);
- }
-
- if (ugh == NULL)
- b->whackfd = NULL_FD; /* complete hand-off */
- else
- cannot_oppo(c, b, ugh);
- }
- }
-#endif /* ADNS */
- close_any(b->whackfd);
-}
-
-void terminate_connection(const char *nm)
-{
- /* Loop because more than one may match (master and instances)
- * But at least one is required (enforced by con_by_name).
- */
- connection_t *c = con_by_name(nm, TRUE);
-
- if (c == NULL || !c->ikev1)
- return;
-
- do
- {
- connection_t *n = c->ac_next; /* grab this before c might disappear */
-
- if (streq(c->name, nm)
- && c->kind >= CK_PERMANENT
- && !NEVER_NEGOTIATE(c->policy))
- {
- set_cur_connection(c);
- plog("terminating SAs using this connection");
- c->policy &= ~POLICY_UP;
- flush_pending_by_connection(c);
- delete_states_by_connection(c, FALSE);
- if (c->kind == CK_INSTANCE)
- delete_connection(c, FALSE);
- reset_cur_connection();
- }
- c = n;
- } while (c);
-}
-
-/* an ISAKMP SA has been established.
- * Note the serial number, and release any connections with
- * the same peer ID but different peer IP address.
- */
-bool uniqueIDs = FALSE; /* --uniqueids? */
-
-void ISAKMP_SA_established(connection_t *c, so_serial_t serial)
-{
- c->newest_isakmp_sa = serial;
-
- /* the connection is now oriented so that we are able to determine
- * whether we are a mode config server with a virtual IP to send.
- */
- if (!c->spd.that.host_srcip->is_anyaddr(c->spd.that.host_srcip) &&
- !c->spd.that.has_natip)
- {
- c->spd.that.modecfg = TRUE;
- }
-
- if (uniqueIDs)
- {
- /* for all connections: if the same Phase 1 IDs are used
- * for a different IP address, unorient that connection.
- */
- connection_t *d;
-
- for (d = connections; d != NULL; )
- {
- connection_t *next = d->ac_next; /* might move underneath us */
-
- if (d->kind >= CK_PERMANENT &&
- c->spd.this.id->equals(c->spd.this.id, d->spd.this.id) &&
- c->spd.that.id->equals(c->spd.that.id, d->spd.that.id) &&
- !sameaddr(&c->spd.that.host_addr, &d->spd.that.host_addr))
- {
- release_connection(d, FALSE);
- }
- d = next;
- }
- }
-}
-
-/* Find the connection to connection c's peer's client with the
- * largest value of .routing. All other things being equal,
- * preference is given to c. If none is routed, return NULL.
- *
- * If erop is non-null, set *erop to a connection sharing both
- * our client subnet and peer's client subnet with the largest value
- * of .routing. If none is erouted, set *erop to NULL.
- *
- * The return value is used to find other connections sharing a route.
- * *erop is used to find other connections sharing an eroute.
- */
-connection_t *route_owner(connection_t *c, struct spd_route **srp,
- connection_t **erop, struct spd_route **esrp)
-{
- connection_t *d
- , *best_ro = c
- , *best_ero = c;
- struct spd_route *srd, *src;
- struct spd_route *best_sr, *best_esr;
- enum routing_t best_routing, best_erouting;
-
- passert(oriented(*c));
- best_sr = NULL;
- best_esr = NULL;
- best_routing = c->spd.routing;
- best_erouting = best_routing;
-
- for (d = connections; d != NULL; d = d->ac_next)
- {
- for (srd = &d->spd; srd; srd = srd->next)
- {
- if (srd->routing == RT_UNROUTED)
- continue;
-
- for (src = &c->spd; src; src=src->next)
- {
- if (!samesubnet(&src->that.client, &srd->that.client))
- {
- continue;
- }
- if (src->that.protocol != srd->that.protocol)
- {
- continue;
- }
- if (src->that.port != srd->that.port)
- {
- continue;
- }
- if (src->mark_out.value != srd->mark_out.value)
- {
- continue;
- }
- passert(oriented(*d));
- if (srd->routing > best_routing)
- {
- best_ro = d;
- best_sr = srd;
- best_routing = srd->routing;
- }
-
- if (!samesubnet(&src->this.client, &srd->this.client))
- {
- continue;
- }
- if (src->this.protocol != srd->this.protocol)
- {
- continue;
- }
- if (src->this.port != srd->this.port)
- {
- continue;
- }
- if (src->mark_in.value != srd->mark_in.value)
- {
- continue;
- }
- if (srd->routing > best_erouting)
- {
- best_ero = d;
- best_esr = srd;
- best_erouting = srd->routing;
- }
- }
- }
- }
-
- DBG(DBG_CONTROL,
- {
- char cib[CONN_INST_BUF];
- err_t m = builddiag("route owner of \"%s\"%s %s:"
- , c->name
- , (fmt_conn_instance(c, cib), cib)
- , enum_name(&routing_story, c->spd.routing));
-
- if (!routed(best_ro->spd.routing))
- m = builddiag("%s NULL", m);
- else if (best_ro == c)
- m = builddiag("%s self", m);
- else
- m = builddiag("%s \"%s\"%s %s", m
- , best_ro->name
- , (fmt_conn_instance(best_ro, cib), cib)
- , enum_name(&routing_story, best_ro->spd.routing));
-
- if (erop)
- {
- m = builddiag("%s; eroute owner:", m);
- if (!erouted(best_ero->spd.routing))
- m = builddiag("%s NULL", m);
- else if (best_ero == c)
- m = builddiag("%s self", m);
- else
- m = builddiag("%s \"%s\"%s %s", m
- , best_ero->name
- , (fmt_conn_instance(best_ero, cib), cib)
- , enum_name(&routing_story, best_ero->spd.routing));
- }
-
- DBG_log("%s", m);
- });
-
- if (erop)
- {
- *erop = erouted(best_erouting)? best_ero : NULL;
- }
- if (srp)
- {
- *srp = best_sr;
- if (esrp)
- {
- *esrp = best_esr;
- }
- }
-
- return routed(best_routing)? best_ro : NULL;
-}
-
-/* Find a connection that owns the shunt eroute between subnets.
- * There ought to be only one.
- * This might get to be a bottleneck -- try hashing if it does.
- */
-connection_t *shunt_owner(const ip_subnet *ours, const ip_subnet *his)
-{
- connection_t *c;
- struct spd_route *sr;
-
- for (c = connections; c != NULL; c = c->ac_next)
- {
- for (sr = &c->spd; sr; sr = sr->next)
- {
- if (shunt_erouted(sr->routing)
- && samesubnet(ours, &sr->this.client)
- && samesubnet(his, &sr->that.client))
- return c;
- }
- }
- return NULL;
-}
-
-/* Find some connection with this pair of hosts.
- * We don't know enough to chose amongst those available.
- * ??? no longer usefully different from find_host_pair_connections
- */
-connection_t *find_host_connection(const ip_address *me, u_int16_t my_port,
- const ip_address *him, u_int16_t his_port,
- lset_t policy)
-{
- connection_t *c = find_host_pair_connections(me, my_port, him, his_port);
-
- if (policy != LEMPTY)
- {
- lset_t auth_requested = policy & POLICY_ID_AUTH_MASK;
-
- /* if we have requirements for the policy,
- * choose the first matching connection.
- */
- while (c)
- {
- if (c->policy & auth_requested)
- {
- break;
- }
- c = c->hp_next;
- }
- }
- return c;
-}
-
-/* given an up-until-now satisfactory connection, find the best connection
- * now that we just got the Phase 1 Id Payload from the peer.
- *
- * Comments in the code describe the (tricky!) matching criteria.
- * Although this routine could handle the initiator case,
- * it isn't currently called in this case.
- * If it were, it could "upgrade" an Opportunistic Connection
- * to a Road Warrior Connection if a suitable Peer ID were found.
- *
- * In RFC 2409 "The Internet Key Exchange (IKE)",
- * in 5.1 "IKE Phase 1 Authenticated With Signatures", describing Main
- * Mode:
- *
- * Initiator Responder
- * ----------- -----------
- * HDR, SA -->
- * <-- HDR, SA
- * HDR, KE, Ni -->
- * <-- HDR, KE, Nr
- * HDR*, IDii, [ CERT, ] SIG_I -->
- * <-- HDR*, IDir, [ CERT, ] SIG_R
- *
- * In 5.4 "Phase 1 Authenticated With a Pre-Shared Key":
- *
- * HDR, SA -->
- * <-- HDR, SA
- * HDR, KE, Ni -->
- * <-- HDR, KE, Nr
- * HDR*, IDii, HASH_I -->
- * <-- HDR*, IDir, HASH_R
- *
- * refine_host_connection could be called in two case:
- *
- * - the Responder receives the IDii payload:
- * + [PSK] after using PSK to decode this message
- * + before sending its IDir payload
- * + before using its ID in HASH_R computation
- * + [DSig] before using its private key to sign SIG_R
- * + before using the Initiator's ID in HASH_I calculation
- * + [DSig] before using the Initiator's public key to check SIG_I
- *
- * - the Initiator receives the IDir payload:
- * + [PSK] after using PSK to encode previous message and decode this message
- * + after sending its IDii payload
- * + after using its ID in HASH_I computation
- * + [DSig] after using its private key to sign SIG_I
- * + before using the Responder's ID to compute HASH_R
- * + [DSig] before using Responder's public key to check SIG_R
- *
- * refine_host_connection can choose a different connection, as long as
- * nothing already used is changed.
- *
- * In the Initiator case, the particular connection might have been
- * specified by whatever provoked Pluto to initiate. For example:
- * whack --initiate connection-name
- * The advantages of switching connections when we're the Initiator seem
- * less important than the disadvantages, so after FreeS/WAN 1.9, we
- * don't do this.
- */
-#define PRIO_NO_MATCH_FOUND 2048
-
-connection_t *refine_host_connection(const struct state *st,
- identification_t *peer_id,
- identification_t *peer_ca)
-{
- connection_t *c = st->st_connection;
- connection_t *d;
- connection_t *best_found = NULL;
- u_int16_t auth = st->st_oakley.auth;
- lset_t auth_policy = POLICY_PSK;
- const chunk_t *psk = NULL;
- bool wcpip; /* wildcard Peer IP? */
- int best_prio = PRIO_NO_MATCH_FOUND;
- int our_pathlen, peer_pathlen;
-
- if (c->spd.that.id->equals(c->spd.that.id, peer_id) &&
- trusted_ca(peer_ca, c->spd.that.ca, &peer_pathlen) &&
- peer_pathlen == 0 &&
- match_requested_ca(c->requested_ca, c->spd.this.ca, &our_pathlen) &&
- our_pathlen == 0)
- {
- DBG(DBG_CONTROL,
- DBG_log("current connection is a full match"
- " -- no need to look further");
- )
- return c;
- }
-
- switch (auth)
- {
- case OAKLEY_PRESHARED_KEY:
- auth_policy = POLICY_PSK;
- psk = get_preshared_secret(c);
- /* It should be virtually impossible to fail to find PSK:
- * we just used it to decode the current message!
- */
- if (psk == NULL)
- {
- return NULL; /* cannot determine PSK! */
- }
- break;
- case XAUTHInitPreShared:
- case XAUTHRespPreShared:
- auth_policy = POLICY_XAUTH_PSK;
- psk = get_preshared_secret(c);
- if (psk == NULL)
- {
- return NULL; /* cannot determine PSK! */
- }
- break;
- case OAKLEY_RSA_SIG:
- case OAKLEY_ECDSA_256:
- case OAKLEY_ECDSA_384:
- case OAKLEY_ECDSA_521:
- auth_policy = POLICY_PUBKEY;
- break;
- case XAUTHInitRSA:
- case XAUTHRespRSA:
- auth_policy = POLICY_XAUTH_RSASIG;
- break;
- default:
- bad_case(auth);
- }
-
- /* The current connection won't do: search for one that will.
- * First search for one with the same pair of hosts.
- * If that fails, search for a suitable Road Warrior or Opportunistic
- * connection (i.e. wildcard peer IP).
- * We need to match:
- * - peer_id (slightly complicated by instantiation)
- * - if PSK auth, the key must not change (we used it to decode message)
- * - policy-as-used must be acceptable to new connection
- */
- d = c->host_pair->connections;
- for (wcpip = FALSE; ; wcpip = TRUE)
- {
- for (; d != NULL; d = d->hp_next)
- {
- const char *match_name[] = {"no", "ok"};
-
- id_match_t match_level = peer_id->matches(peer_id, d->spd.that.id);
-
- bool matching_id = match_level > ID_MATCH_NONE;
-
- bool matching_auth = (d->policy & auth_policy) != LEMPTY;
-
- bool matching_trust = trusted_ca(peer_ca
- , d->spd.that.ca, &peer_pathlen);
- bool matching_request = match_requested_ca(c->requested_ca
- , d->spd.this.ca, &our_pathlen);
- bool match = matching_id && matching_auth && matching_trust;
-
- int prio = (ID_MATCH_PERFECT) * !matching_request +
- ID_MATCH_PERFECT - match_level;
-
- prio = (X509_MAX_PATH_LEN + 1) * prio + peer_pathlen;
- prio = (X509_MAX_PATH_LEN + 1) * prio + our_pathlen;
-
- DBG(DBG_CONTROLMORE,
- DBG_log("%s: %s match (id: %s, auth: %s, trust: %s, request: %s, prio: %4d)"
- , d->name
- , match ? "full":" no"
- , match_name[matching_id]
- , match_name[matching_auth]
- , match_name[matching_trust]
- , match_name[matching_request]
- , match ? prio:PRIO_NO_MATCH_FOUND)
- )
-
- /* do we have a match? */
- if (!match)
- {
- continue;
- }
-
- /* ignore group connections */
- if (d->policy & POLICY_GROUP)
- {
- continue;
- }
-
- if (c->spd.that.host_port != d->spd.that.host_port
- && d->kind == CK_INSTANCE)
- {
- continue;
- }
-
- switch (auth)
- {
- case OAKLEY_PRESHARED_KEY:
- case XAUTHInitPreShared:
- case XAUTHRespPreShared:
- /* secret must match the one we already used */
- {
- const chunk_t *dpsk = get_preshared_secret(d);
-
- if (dpsk == NULL)
- {
- continue; /* no secret */
- }
- if (psk != dpsk)
- {
- if (psk->len != dpsk->len
- || memcmp(psk->ptr, dpsk->ptr, psk->len) != 0)
- {
- continue; /* different secret */
- }
- }
- }
- break;
-
- case OAKLEY_RSA_SIG:
- case OAKLEY_ECDSA_256:
- case OAKLEY_ECDSA_384:
- case OAKLEY_ECDSA_521:
- case XAUTHInitRSA:
- case XAUTHRespRSA:
- /*
- * We must at least be able to find our private key
- .*/
- if (d->spd.this.sc == NULL /* no smartcard */
- && get_private_key(d) == NULL) /* no private key */
- {
- continue;
- }
- break;
-
- default:
- bad_case(auth);
- }
-
- /* d has passed all the tests.
- * We'll go with it if the Peer ID was an exact match.
- */
- if (prio == 0)
- {
- return d;
- }
-
- /* We'll remember it as best_found in case an exact
- * match doesn't come along.
- */
- if (prio < best_prio)
- {
- best_found = d;
- best_prio = prio;
- }
- }
- if (wcpip)
- return best_found; /* been around twice already */
-
- /* Starting second time around.
- * We're willing to settle for a connection that needs Peer IP
- * instantiated: Road Warrior or Opportunistic.
- * Look on list of connections for host pair with wildcard Peer IP
- */
- d = find_host_pair_connections(&c->spd.this.host_addr, c->spd.this.host_port
- , (ip_address *)NULL, c->spd.that.host_port);
- }
-}
-
-/**
- * With virtual addressing, we must not allow someone to use an already
- * used (by another id) addr/net.
- */
-static bool is_virtual_net_used(const ip_subnet *peer_net,
- identification_t *peer_id)
-{
- connection_t *d;
-
- for (d = connections; d != NULL; d = d->ac_next)
- {
- switch (d->kind)
- {
- case CK_PERMANENT:
- case CK_INSTANCE:
- if ((subnetinsubnet(peer_net,&d->spd.that.client) ||
- subnetinsubnet(&d->spd.that.client,peer_net))
- && !d->spd.that.id->equals(d->spd.that.id, peer_id))
- {
- char client[SUBNETTOT_BUF];
-
- subnettot(peer_net, 0, client, sizeof(client));
- plog("Virtual IP %s is already used by '%Y'",
- client, d->spd.that.id);
- plog("Your ID is '%Y'", peer_id);
-
- return TRUE; /* already used by another one */
- }
- break;
- case CK_GOING_AWAY:
- default:
- break;
- }
- }
- return FALSE; /* you can safely use it */
-}
-
-/* find_client_connection: given a connection suitable for ISAKMP
- * (i.e. the hosts match), find a one suitable for IPSEC
- * (i.e. with matching clients).
- *
- * If we don't find an exact match (not even our current connection),
- * we try for one that still needs instantiation. Try Road Warrior
- * abstract connections and the Opportunistic abstract connections.
- * This requires inverse instantiation: abstraction.
- *
- * After failing to find an exact match, we abstract the peer
- * to be NO_IP (the wildcard value). This enables matches with
- * Road Warrior and Opportunistic abstract connections.
- *
- * After failing that search, we also abstract the Phase 1 peer ID
- * if possible. If the peer's ID was the peer's IP address, we make
- * it NO_ID; instantiation will make it the peer's IP address again.
- *
- * If searching for a Road Warrior abstract connection fails,
- * and conditions are suitable, we search for the best Opportunistic
- * abstract connection.
- *
- * Note: in the end, both Phase 1 IDs must be preserved, after any
- * instantiation. They are the IDs that have been authenticated.
- */
-
-#define PATH_WEIGHT 1
-#define WILD_WEIGHT (X509_MAX_PATH_LEN+1)
-#define PRIO_WEIGHT (ID_MATCH_PERFECT+1) * WILD_WEIGHT
-
-/* fc_try: a helper function for find_client_connection */
-static connection_t *fc_try(const connection_t *c, struct host_pair *hp,
- identification_t *peer_id,
- const ip_subnet *our_net,
- const ip_subnet *peer_net,
- const u_int8_t our_protocol,
- const u_int16_t our_port,
- const u_int8_t peer_protocol,
- const u_int16_t peer_port,
- identification_t *peer_ca,
- ietf_attributes_t *peer_attributes)
-{
- connection_t *d;
- connection_t *best = NULL;
- policy_prio_t best_prio = BOTTOM_PRIO;
- id_match_t match_level;
- int pathlen;
-
-
- const bool peer_net_is_host = subnetisaddr(peer_net, &c->spd.that.host_addr);
-
- for (d = hp->connections; d != NULL; d = d->hp_next)
- {
- struct spd_route *sr;
-
- if (d->policy & POLICY_GROUP)
- {
- continue;
- }
-
- match_level = c->spd.that.id->matches(c->spd.that.id, d->spd.that.id);
-
- if (!(c->spd.this.id->equals(c->spd.this.id, d->spd.this.id) &&
- (match_level > ID_MATCH_NONE) &&
- trusted_ca(peer_ca, d->spd.that.ca, &pathlen) &&
- match_group_membership(peer_attributes, d->name, d->spd.that.groups)))
- {
- continue;
- }
-
- /* compare protocol and ports */
- if (d->spd.this.protocol != our_protocol
- || d->spd.this.port != our_port
- || d->spd.that.protocol != peer_protocol
- || (d->spd.that.port != peer_port && !d->spd.that.has_port_wildcard))
- {
- continue;
- }
-
- /* non-Opportunistic case:
- * our_client must match.
- *
- * So must peer_client, but the testing is complicated
- * by the fact that the peer might be a wildcard
- * and if so, the default value of that.client
- * won't match the default peer_net. The appropriate test:
- *
- * If d has a peer client, it must match peer_net.
- * If d has no peer client, peer_net must just have peer itself.
- */
-
- for (sr = &d->spd; best != d && sr != NULL; sr = sr->next)
- {
- policy_prio_t prio;
-#ifdef DEBUG
- if (DBGP(DBG_CONTROLMORE))
- {
- char s1[SUBNETTOT_BUF],d1[SUBNETTOT_BUF];
- char s3[SUBNETTOT_BUF],d3[SUBNETTOT_BUF];
-
- subnettot(our_net, 0, s1, sizeof(s1));
- subnettot(peer_net, 0, d1, sizeof(d1));
- subnettot(&sr->this.client, 0, s3, sizeof(s3));
- subnettot(&sr->that.client, 0, d3, sizeof(d3));
- DBG_log(" fc_try trying "
- "%s:%s:%d/%d -> %s:%d/%d vs %s:%s:%d/%d -> %s:%d/%d"
- , c->name, s1, c->spd.this.protocol, c->spd.this.port
- , d1, c->spd.that.protocol, c->spd.that.port
- , d->name, s3, sr->this.protocol, sr->this.port
- , d3, sr->that.protocol, sr->that.port);
- }
-#endif /* DEBUG */
-
- if (!samesubnet(&sr->this.client, our_net))
- {
- continue;
- }
- if (sr->that.has_client)
- {
- if (sr->that.has_client_wildcard)
- {
- if (!subnetinsubnet(peer_net, &sr->that.client))
- {
- continue;
- }
- }
- else
- {
- if (!samesubnet(&sr->that.client, peer_net) && !is_virtual_connection(d))
- {
- continue;
- }
- if (is_virtual_connection(d)
- && (!is_virtual_net_allowed(d, peer_net, &c->spd.that.host_addr)
- || is_virtual_net_used(peer_net, peer_id?peer_id:c->spd.that.id)))
- {
- continue;
- }
- }
- }
- else
- {
- host_t *vip = c->spd.that.host_srcip;
-
- if (!peer_net_is_host && !(sr->that.modecfg && c->spd.that.modecfg &&
- subnetisaddr(peer_net, (ip_address*)vip->get_sockaddr(vip))))
- {
- continue;
- }
- }
-
- /* We've run the gauntlet -- success:
- * We've got an exact match of subnets.
- * The connection is feasible, but we continue looking for the best.
- * The highest priority wins, implementing eroute-like rule.
- * - a routed connection is preferrred
- * - given that, the smallest number of ID wildcards are preferred
- * - given that, the shortest CA pathlength is preferred
- */
- prio = PRIO_WEIGHT * routed(sr->routing)
- + WILD_WEIGHT * match_level
- + PATH_WEIGHT * (X509_MAX_PATH_LEN - pathlen)
- + 1;
- if (prio > best_prio)
- {
- best = d;
- best_prio = prio;
- }
- }
- }
-
- if (best && NEVER_NEGOTIATE(best->policy))
- {
- best = NULL;
- }
- DBG(DBG_CONTROLMORE,
- DBG_log(" fc_try concluding with %s [%ld]"
- , (best ? best->name : "none"), best_prio)
- )
- return best;
-}
-
-static connection_t *fc_try_oppo(const connection_t *c,
- struct host_pair *hp,
- const ip_subnet *our_net,
- const ip_subnet *peer_net,
- const u_int8_t our_protocol,
- const u_int16_t our_port,
- const u_int8_t peer_protocol,
- const u_int16_t peer_port,
- identification_t *peer_ca,
- ietf_attributes_t *peer_attributes)
-{
- connection_t *d;
- connection_t *best = NULL;
- policy_prio_t best_prio = BOTTOM_PRIO;
- id_match_t match_level;
- int pathlen;
-
- for (d = hp->connections; d != NULL; d = d->hp_next)
- {
- struct spd_route *sr;
- policy_prio_t prio;
-
- if (d->policy & POLICY_GROUP)
- {
- continue;
- }
- match_level = c->spd.that.id->matches(c->spd.that.id, c->spd.that.id);
-
- if (!(c->spd.this.id->equals(c->spd.this.id, d->spd.this.id) &&
- (match_level > ID_MATCH_NONE) &&
- trusted_ca(peer_ca, d->spd.that.ca, &pathlen) &&
- match_group_membership(peer_attributes, d->name, d->spd.that.groups)))
- {
- continue;
- }
-
- /* compare protocol and ports */
- if (d->spd.this.protocol != our_protocol
- || d->spd.this.port != our_port
- || d->spd.that.protocol != peer_protocol
- || (d->spd.that.port != peer_port && !d->spd.that.has_port_wildcard))
- {
- continue;
- }
-
- /* Opportunistic case:
- * our_net must be inside d->spd.this.client
- * and peer_net must be inside d->spd.that.client
- * Note: this host_pair chain also has shunt
- * eroute conns (clear, drop), but they won't
- * be marked as opportunistic.
- */
- for (sr = &d->spd; sr != NULL; sr = sr->next)
- {
-#ifdef DEBUG
- if (DBGP(DBG_CONTROLMORE))
- {
- char s1[SUBNETTOT_BUF],d1[SUBNETTOT_BUF];
- char s3[SUBNETTOT_BUF],d3[SUBNETTOT_BUF];
-
- subnettot(our_net, 0, s1, sizeof(s1));
- subnettot(peer_net, 0, d1, sizeof(d1));
- subnettot(&sr->this.client, 0, s3, sizeof(s3));
- subnettot(&sr->that.client, 0, d3, sizeof(d3));
- DBG_log(" fc_try_oppo trying %s:%s -> %s vs %s:%s -> %s"
- , c->name, s1, d1, d->name, s3, d3);
- }
-#endif /* DEBUG */
-
- if (!subnetinsubnet(our_net, &sr->this.client)
- || !subnetinsubnet(peer_net, &sr->that.client))
- {
- continue;
- }
-
- /* The connection is feasible, but we continue looking for the best.
- * The highest priority wins, implementing eroute-like rule.
- * - our smallest client subnet is preferred (longest mask)
- * - given that, his smallest client subnet is preferred
- * - given that, a routed connection is preferrred
- * - given that, the smallest number of ID wildcards are preferred
- * - given that, the shortest CA pathlength is preferred
- */
- prio = PRIO_WEIGHT * (d->prio + routed(sr->routing))
- + WILD_WEIGHT * match_level
- + PATH_WEIGHT * (X509_MAX_PATH_LEN - pathlen);
- if (prio > best_prio)
- {
- best = d;
- best_prio = prio;
- }
- }
- }
-
- /* if the best wasn't opportunistic, we fail: it must be a shunt */
- if (best && (NEVER_NEGOTIATE(best->policy) ||
- (best->policy & POLICY_OPPO) == LEMPTY))
- {
- best = NULL;
- }
-
- DBG(DBG_CONTROLMORE,
- DBG_log(" fc_try_oppo concluding with %s [%ld]"
- , (best ? best->name : "none"), best_prio)
- )
- return best;
-
-}
-
-/*
- * get the peer's CA and group attributes
- */
-void get_peer_ca_and_groups(connection_t *c,
- identification_t **peer_ca,
- ietf_attributes_t **peer_attributes)
-{
- struct state *p1st;
-
- *peer_ca = NULL;
- *peer_attributes = NULL;
-
- p1st = find_phase1_state(c, ISAKMP_SA_ESTABLISHED_STATES);
- if (p1st && p1st->st_peer_pubkey && p1st->st_peer_pubkey->issuer)
- {
- certificate_t *cert;
-
- cert = ac_get_cert(p1st->st_peer_pubkey->issuer,
- p1st->st_peer_pubkey->serial);
- if (cert && ac_verify_cert(cert, strict_crl_policy))
- {
- ac_t *ac = (ac_t*)cert;
-
- *peer_attributes = ac->get_groups(ac);
- }
- else
- {
- DBG(DBG_CONTROL,
- DBG_log("no valid attribute cert found")
- )
- }
- *peer_ca = p1st->st_peer_pubkey->issuer;
- }
-}
-
-connection_t *find_client_connection(connection_t *c,
- const ip_subnet *our_net,
- const ip_subnet *peer_net,
- const u_int8_t our_protocol,
- const u_int16_t our_port,
- const u_int8_t peer_protocol,
- const u_int16_t peer_port)
-{
- connection_t *d;
- struct spd_route *sr;
- ietf_attributes_t *peer_attributes = NULL;
- identification_t *peer_ca;
-
- get_peer_ca_and_groups(c, &peer_ca, &peer_attributes);
-
-#ifdef DEBUG
- if (DBGP(DBG_CONTROLMORE))
- {
- char s1[SUBNETTOT_BUF],d1[SUBNETTOT_BUF];
-
- subnettot(our_net, 0, s1, sizeof(s1));
- subnettot(peer_net, 0, d1, sizeof(d1));
-
- DBG_log("find_client_connection starting with %s"
- , (c ? c->name : "(none)"));
- DBG_log(" looking for %s:%d/%d -> %s:%d/%d"
- , s1, our_protocol, our_port
- , d1, peer_protocol, peer_port);
- }
-#endif /* DEBUG */
-
- /* give priority to current connection
- * but even greater priority to a routed concrete connection
- */
- {
- connection_t *unrouted = NULL;
- int srnum = -1;
-
- for (sr = &c->spd; unrouted == NULL && sr != NULL; sr = sr->next)
- {
- srnum++;
-
-#ifdef DEBUG
- if (DBGP(DBG_CONTROLMORE))
- {
- char s2[SUBNETTOT_BUF],d2[SUBNETTOT_BUF];
-
- subnettot(&sr->this.client, 0, s2, sizeof(s2));
- subnettot(&sr->that.client, 0, d2, sizeof(d2));
- DBG_log(" concrete checking against sr#%d %s -> %s"
- , srnum, s2, d2);
- }
-#endif /* DEBUG */
-
- if (samesubnet(&sr->this.client, our_net)
- && samesubnet(&sr->that.client, peer_net)
- && sr->this.protocol == our_protocol
- && sr->this.port == our_port
- && sr->that.protocol == peer_protocol
- && sr->that.port == peer_port
- && match_group_membership(peer_attributes, c->name, sr->that.groups))
- {
- passert(oriented(*c));
- if (routed(sr->routing))
- {
- DESTROY_IF(peer_attributes);
- return c;
- }
- unrouted = c;
- }
- }
-
- /* exact match? */
- d = fc_try(c, c->host_pair, NULL, our_net, peer_net
- , our_protocol, our_port, peer_protocol, peer_port
- , peer_ca, peer_attributes);
-
- DBG(DBG_CONTROLMORE,
- DBG_log(" fc_try %s gives %s"
- , c->name
- , (d ? d->name : "none"))
- )
-
- if (d == NULL)
- {
- d = unrouted;
- }
- }
-
- if (d == NULL)
- {
- /* look for an abstract connection to match */
- struct spd_route *sr;
- struct host_pair *hp = NULL;
-
- for (sr = &c->spd; hp==NULL && sr != NULL; sr = sr->next)
- {
- hp = find_host_pair(&sr->this.host_addr
- , sr->this.host_port
- , NULL
- , sr->that.host_port);
-#ifdef DEBUG
- if (DBGP(DBG_CONTROLMORE))
- {
- char s2[SUBNETTOT_BUF],d2[SUBNETTOT_BUF];
-
- subnettot(&sr->this.client, 0, s2, sizeof(s2));
- subnettot(&sr->that.client, 0, d2, sizeof(d2));
-
- DBG_log(" checking hostpair %s -> %s is %s"
- , s2, d2
- , (hp ? "found" : "not found"));
- }
-#endif /* DEBUG */
- }
-
- if (hp)
- {
- /* RW match with actual peer_id or abstract peer_id? */
- d = fc_try(c, hp, NULL, our_net, peer_net
- , our_protocol, our_port, peer_protocol, peer_port
- , peer_ca, peer_attributes);
-
- if (d == NULL
- && subnetishost(our_net)
- && subnetishost(peer_net))
- {
- /* Opportunistic match?
- * Always use abstract peer_id.
- * Note that later instantiation will result in the same peer_id.
- */
- d = fc_try_oppo(c, hp, our_net, peer_net
- , our_protocol, our_port, peer_protocol, peer_port
- , peer_ca, peer_attributes);
- }
- }
- }
-
- DBG(DBG_CONTROLMORE,
- DBG_log(" concluding with d = %s"
- , (d ? d->name : "none"))
- )
- DESTROY_IF(peer_attributes);
- return d;
-}
-
-int connection_compare(const connection_t *ca, const connection_t *cb)
-{
- int ret;
-
- /* DBG_log("comparing %s to %s", ca->name, cb->name); */
-
- ret = strcasecmp(ca->name, cb->name);
- if (ret)
- {
- return ret;
- }
-
- ret = ca->kind - cb->kind; /* note: enum connection_kind behaves like int */
- if (ret)
- {
- return ret;
- }
-
- /* same name, and same type */
- switch (ca->kind)
- {
- case CK_INSTANCE:
- return ca->instance_serial < cb->instance_serial ? -1
- : ca->instance_serial > cb->instance_serial ? 1
- : 0;
-
- default:
- return ca->prio < cb->prio ? -1
- : ca->prio > cb->prio ? 1
- : 0;
- }
-}
-
-static int connection_compare_qsort(const void *a, const void *b)
-{
- return connection_compare(*(const connection_t *const *)a
- , *(const connection_t *const *)b);
-}
-
-void show_connections_status(bool all, const char *name)
-{
- connection_t *c;
- int count, i;
- connection_t **array;
-
- /* make an array of connections, and sort it */
- count = 0;
- for (c = connections; c != NULL; c = c->ac_next)
- {
- if (c->ikev1 && (name == NULL || streq(c->name, name)))
- count++;
- }
- array = malloc(sizeof(connection_t *)*count);
-
- count=0;
- for (c = connections; c != NULL; c = c->ac_next)
- {
- if (c->ikev1 && (name == NULL || streq(c->name, name)))
- array[count++]=c;
- }
-
- /* sort it! */
- qsort(array, count, sizeof(connection_t *), connection_compare_qsort);
-
- for (i = 0; i < count; i++)
- {
- const char *ifn;
- char instance[1 + 10 + 1];
- char prio[POLICY_PRIO_BUF];
-
- c = array[i];
-
- ifn = oriented(*c)? c->interface->rname : "";
-
- instance[0] = '\0';
- if (c->kind == CK_INSTANCE && c->instance_serial != 0)
- snprintf(instance, sizeof(instance), "[%lu]", c->instance_serial);
-
- /* show topology */
- {
- char topo[BUF_LEN];
- struct spd_route *sr = &c->spd;
- int num=0;
-
- while (sr)
- {
- (void) format_connection(topo, sizeof(topo), c, sr);
- whack_log(RC_COMMENT, "\"%s\"%s: %s; %s; eroute owner: #%lu"
- , c->name, instance, topo
- , enum_name(&routing_story, sr->routing)
- , sr->eroute_owner);
- sr = sr->next;
- num++;
- }
- }
-
- if (all)
- {
- /* show CAs if defined */
- if (c->spd.this.ca && c->spd.that.ca)
- {
- whack_log(RC_COMMENT, "\"%s\"%s: CAs: \"%Y\"...\"%Y\"",
- c->name, instance, c->spd.this.ca, c->spd.that.ca);
- }
- else if (c->spd.this.ca)
- {
- whack_log(RC_COMMENT, "\"%s\"%s: CAs: \"%Y\"...%%any",
- c->name, instance, c->spd.this.ca);
-
- }
- else if (c->spd.that.ca)
- {
- whack_log(RC_COMMENT, "\"%s\"%s: CAs: %%any...\"%Y\"",
- c->name, instance, c->spd.that.ca);
- }
-
- /* show group attributes if defined */
- if (c->spd.that.groups)
- {
- whack_log(RC_COMMENT, "\"%s\"%s: groups: %s"
- , c->name
- , instance
- , c->spd.that.groups->get_string(c->spd.that.groups));
- }
-
- whack_log(RC_COMMENT
- , "\"%s\"%s: ike_life: %lus; ipsec_life: %lus;"
- " rekey_margin: %lus; rekey_fuzz: %lu%%; keyingtries: %lu"
- , c->name
- , instance
- , (unsigned long) c->sa_ike_life_seconds
- , (unsigned long) c->sa_ipsec_life_seconds
- , (unsigned long) c->sa_rekey_margin
- , (unsigned long) c->sa_rekey_fuzz
- , (unsigned long) c->sa_keying_tries);
-
- /* show DPD parameters if defined */
-
- if (c->dpd_action != DPD_ACTION_NONE)
- whack_log(RC_COMMENT
- , "\"%s\"%s: dpd_action: %N;"
- " dpd_delay: %lus; dpd_timeout: %lus;"
- , c->name
- , instance
- , dpd_action_names, c->dpd_action
- , (unsigned long) c->dpd_delay
- , (unsigned long) c->dpd_timeout);
-
- if (c->policy_next)
- {
- whack_log(RC_COMMENT
- , "\"%s\"%s: policy_next: %s"
- , c->name, instance, c->policy_next->name);
- }
-
- /* Note: we display key_from_DNS_on_demand as if policy [lr]KOD */
- fmt_policy_prio(c->prio, prio);
- whack_log(RC_COMMENT
- , "\"%s\"%s: policy: %s%s%s; prio: %s; interface: %s; "
- , c->name
- , instance
- , prettypolicy(c->policy)
- , c->spd.this.key_from_DNS_on_demand? "+lKOD" : ""
- , c->spd.that.key_from_DNS_on_demand? "+rKOD" : ""
- , prio
- , ifn);
- }
-
- whack_log(RC_COMMENT
- , "\"%s\"%s: newest ISAKMP SA: #%ld; newest IPsec SA: #%ld; "
- , c->name
- , instance
- , c->newest_isakmp_sa
- , c->newest_ipsec_sa);
-
- if (all)
- {
- ike_alg_show_connection(c, instance);
- kernel_alg_show_connection(c, instance);
- }
- }
- if (count > 0)
- whack_log(RC_COMMENT, BLANK_FORMAT); /* spacer */
-
- free(array);
-}
-
-/* struct pending, the structure representing Quick Mode
- * negotiations delayed until a Keying Channel has been negotiated.
- * Essentially, a pending call to quick_outI1.
- */
-
-struct pending {
- int whack_sock;
- struct state *isakmp_sa;
- connection_t *connection;
- lset_t policy;
- unsigned long try;
- so_serial_t replacing;
-
- struct pending *next;
-};
-
-/* queue a Quick Mode negotiation pending completion of a suitable Main Mode */
-void add_pending(int whack_sock, struct state *isakmp_sa, connection_t *c,
- lset_t policy, unsigned long try, so_serial_t replacing)
-{
- bool already_queued = FALSE;
- struct pending *p = c->host_pair->pending;
-
- while (p)
- {
- if (streq(c->name, p->connection->name))
- {
- already_queued = TRUE;
- break;
- }
- p = p->next;
- }
- DBG(DBG_CONTROL,
- DBG_log("Queuing pending Quick Mode with %s \"%s\"%s"
- , ip_str(&c->spd.that.host_addr)
- , c->name
- , already_queued? " already done" : "")
- )
- if (already_queued)
- return;
-
- p = malloc_thing(struct pending);
- p->whack_sock = whack_sock;
- p->isakmp_sa = isakmp_sa;
- p->connection = c;
- p->policy = policy;
- p->try = try;
- p->replacing = replacing;
- p->next = c->host_pair->pending;
- c->host_pair->pending = p;
-}
-
-/* Release all the whacks awaiting the completion of this state.
- * This is accomplished by closing all the whack socket file descriptors.
- * We go to a lot of trouble to tell each whack, but to not tell it twice.
- */
-void release_pending_whacks(struct state *st, err_t story)
-{
- struct pending *p;
- struct stat stst;
-
- if (st->st_whack_sock == NULL_FD || fstat(st->st_whack_sock, &stst) != 0)
- zero(&stst); /* resulting st_dev/st_ino ought to be distinct */
-
- release_whack(st);
-
- for (p = st->st_connection->host_pair->pending; p != NULL; p = p->next)
- {
- if (p->isakmp_sa == st && p->whack_sock != NULL_FD)
- {
- struct stat pst;
-
- if (fstat(p->whack_sock, &pst) == 0
- && (stst.st_dev != pst.st_dev || stst.st_ino != pst.st_ino))
- {
- passert(whack_log_fd == NULL_FD);
- whack_log_fd = p->whack_sock;
- whack_log(RC_COMMENT
- , "%s for ISAKMP SA, but releasing whack for pending IPSEC SA"
- , story);
- whack_log_fd = NULL_FD;
- }
- close(p->whack_sock);
- p->whack_sock = NULL_FD;
- }
- }
-}
-
-static void delete_pending(struct pending **pp)
-{
- struct pending *p = *pp;
-
- *pp = p->next;
- if (p->connection)
- {
- connection_discard(p->connection);
- }
- close_any(p->whack_sock);
- free(p);
-}
-
-void unpend(struct state *st)
-{
- struct pending **pp
- , *p;
-
- for (pp = &st->st_connection->host_pair->pending; (p = *pp) != NULL; )
- {
- if (p->isakmp_sa == st)
- {
- DBG(DBG_CONTROL, DBG_log("unqueuing pending Quick Mode with %s \"%s\""
- , ip_str(&p->connection->spd.that.host_addr)
- , p->connection->name));
- (void) quick_outI1(p->whack_sock, st, p->connection, p->policy
- , p->try, p->replacing);
- p->whack_sock = NULL_FD; /* ownership transferred */
- p->connection = NULL; /* ownership transferred */
- delete_pending(pp);
- }
- else
- {
- pp = &p->next;
- }
- }
-}
-
-/* a Main Mode negotiation has been replaced; update any pending */
-void update_pending(struct state *os, struct state *ns)
-{
- struct pending *p;
-
- for (p = os->st_connection->host_pair->pending; p != NULL; p = p->next)
- {
- if (p->isakmp_sa == os)
- p->isakmp_sa = ns;
- if (p->connection->spd.this.host_port != ns->st_connection->spd.this.host_port)
- {
- p->connection->spd.this.host_port = ns->st_connection->spd.this.host_port;
- p->connection->spd.that.host_port = ns->st_connection->spd.that.host_port;
- }
- }
-}
-
-/* a Main Mode negotiation has failed; discard any pending */
-void flush_pending_by_state(struct state *st)
-{
- struct host_pair *hp = st->st_connection->host_pair;
-
- if (hp)
- {
- struct pending **pp
- , *p;
-
- for (pp = &hp->pending; (p = *pp) != NULL; )
- {
- if (p->isakmp_sa == st)
- delete_pending(pp);
- else
- pp = &p->next;
- }
- }
-}
-
-/* a connection has been deleted; discard any related pending */
-static void flush_pending_by_connection(connection_t *c)
-{
- if (c->host_pair)
- {
- struct pending **pp
- , *p;
-
- for (pp = &c->host_pair->pending; (p = *pp) != NULL; )
- {
- if (p->connection == c)
- {
- p->connection = NULL; /* prevent delete_pending from releasing */
- delete_pending(pp);
- }
- else
- {
- pp = &p->next;
- }
- }
- }
-}
-
-void show_pending_phase2(const struct host_pair *hp, const struct state *st)
-{
- const struct pending *p;
-
- for (p = hp->pending; p != NULL; p = p->next)
- {
- if (p->isakmp_sa == st)
- {
- /* connection-name state-number [replacing state-number] */
- char cip[CONN_INST_BUF];
-
- fmt_conn_instance(p->connection, cip);
- whack_log(RC_COMMENT, "#%lu: pending Phase 2 for \"%s\"%s replacing #%lu"
- , p->isakmp_sa->st_serialno
- , p->connection->name
- , cip
- , p->replacing);
- }
- }
-}
-
-/* Delete a connection if it is an instance and it is no longer in use.
- * We must be careful to avoid circularity:
- * we don't touch it if it is CK_GOING_AWAY.
- */
-void connection_discard(connection_t *c)
-{
- if (c->kind == CK_INSTANCE)
- {
- /* see if it is being used by a pending */
- struct pending *p;
-
- for (p = c->host_pair->pending; p != NULL; p = p->next)
- if (p->connection == c)
- return; /* in use, so we're done */
-
- if (!states_use_connection(c))
- delete_connection(c, FALSE);
- }
-}
-
-
-/* A template connection's eroute can be eclipsed by
- * either a %hold or an eroute for an instance iff
- * the template is a /32 -> /32. This requires some special casing.
- */
-
-long eclipse_count = 0;
-
-connection_t *eclipsed(connection_t *c, struct spd_route **esrp)
-{
- connection_t *ue;
- struct spd_route *sr1 = &c->spd;
-
- ue = NULL;
-
- while (sr1 && ue)
- {
- for (ue = connections; ue != NULL; ue = ue->ac_next)
- {
- struct spd_route *srue = &ue->spd;
-
- while (srue && srue->routing == RT_ROUTED_ECLIPSED
- && !(samesubnet(&sr1->this.client, &srue->this.client)
- && samesubnet(&sr1->that.client, &srue->that.client)))
- {
- srue = srue->next;
- }
- if (srue && srue->routing == RT_ROUTED_ECLIPSED)
- {
- *esrp = srue;
- break;
- }
- }
- }
- return ue;
-}
-
-/*
- * Local Variables:
- * c-basic-offset:4
- * c-style: pluto
- * End:
- */