#include <utils/linked_list.h>
#include <processing/jobs/callback_job.h>
-/** required for Linux 2.6.26 kernel and later */
+/** Required for Linux 2.6.26 kernel and later */
#ifndef XFRM_STATE_AF_UNSPEC
-#define XFRM_STATE_AF_UNSPEC 32
+#define XFRM_STATE_AF_UNSPEC 32
#endif
-/** from linux/in.h */
+/** From linux/in.h */
#ifndef IP_XFRM_POLICY
#define IP_XFRM_POLICY 17
#endif
-/* missing on uclibc */
+/** Missing on uclibc */
#ifndef IPV6_XFRM_POLICY
#define IPV6_XFRM_POLICY 34
#endif /*IPV6_XFRM_POLICY*/
-/** default priority of installed policies */
+/** Default priority of installed policies */
#define PRIO_LOW 1024
#define PRIO_HIGH 512
-/** default replay window size, if not set using charon.replay_window */
+/** Default replay window size, if not set using charon.replay_window */
#define DEFAULT_REPLAY_WINDOW 32
/**
- * map the limit for bytes and packets to XFRM_INF per default
+ * Map the limit for bytes and packets to XFRM_INF by default
*/
#define XFRM_LIMIT(x) ((x) == 0 ? XFRM_INF : (x))
#define XFRMNLGRP(x) (1<<(XFRMNLGRP_##x-1))
/**
- * returns a pointer to the first rtattr following the nlmsghdr *nlh and the
+ * Returns a pointer to the first rtattr following the nlmsghdr *nlh and the
* 'usual' netlink data x like 'struct xfrm_usersa_info'
*/
-#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + NLMSG_ALIGN(sizeof(x))))
+#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + \
+ NLMSG_ALIGN(sizeof(x))))
/**
- * returns a pointer to the next rtattr following rta.
- * !!! do not use this to parse messages. use RTA_NEXT and RTA_OK instead !!!
+ * Returns a pointer to the next rtattr following rta.
+ * !!! Do not use this to parse messages. Use RTA_NEXT and RTA_OK instead !!!
*/
-#define XFRM_RTA_NEXT(rta) ((struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
+#define XFRM_RTA_NEXT(rta) ((struct rtattr*)(((char*)(rta)) + \
+ RTA_ALIGN((rta)->rta_len)))
/**
- * returns the total size of attached rta data
+ * Returns the total size of attached rta data
* (after 'usual' netlink data x like 'struct xfrm_usersa_info')
*/
#define XFRM_PAYLOAD(nlh, x) NLMSG_PAYLOAD(nlh, sizeof(x))
*/
struct private_kernel_netlink_ipsec_t {
/**
- * Public part of the kernel_netlink_t object.
+ * Public part of the kernel_netlink_t object
*/
kernel_netlink_ipsec_t public;
/**
- * mutex to lock access to installed policies
+ * Mutex to lock access to installed policies
*/
mutex_t *mutex;
hashtable_t *sas;
/**
- * job receiving netlink events
+ * Job receiving netlink events
*/
callback_job_t *job;
netlink_socket_t *socket_xfrm;
/**
- * netlink xfrm socket to receive acquire and expire events
+ * Netlink xfrm socket to receive acquire and expire events
*/
int socket_xfrm_events;
/**
- * whether to install routes along policies
+ * Whether to install routes along policies
*/
bool install_routes;
typedef struct route_entry_t route_entry_t;
/**
- * installed routing entry
+ * Installed routing entry
*/
struct route_entry_t {
- /** name of the interface the route is bound to */
+ /** Name of the interface the route is bound to */
char *if_name;
- /** source ip of the route */
+ /** Source ip of the route */
host_t *src_ip;
- /** gateway for this route */
+ /** Gateway for this route */
host_t *gateway;
- /** destination net */
+ /** Destination net */
chunk_t dst_net;
- /** destination net prefixlen */
+ /** Destination net prefixlen */
u_int8_t prefixlen;
};
/**
- * destroy a route_entry_t object
+ * Destroy a route_entry_t object
*/
static void route_entry_destroy(route_entry_t *this)
{
}
/**
- * compare two route_entry_t objects
+ * Compare two route_entry_t objects
*/
static bool route_entry_equals(route_entry_t *a, route_entry_t *b)
{
* IPsec SA assigned to a policy.
*/
struct ipsec_sa_t {
- /** source address of this SA */
+ /** Source address of this SA */
host_t *src;
- /** destination address of this SA */
+ /** Destination address of this SA */
host_t *dst;
- /** optional mark */
+ /** Optional mark */
mark_t mark;
- /** description of this SA */
+ /** Description of this SA */
ipsec_sa_cfg_t cfg;
- /** reference count for this SA */
+ /** Reference count for this SA */
refcount_t refcount;
};
}
/**
- * allocate or reference an IPsec SA object
+ * Allocate or reference an IPsec SA object
*/
static ipsec_sa_t *ipsec_sa_create(private_kernel_netlink_ipsec_t *this,
host_t *src, host_t *dst, mark_t mark,
}
/**
- * release and destroy an IPsec SA object
+ * Release and destroy an IPsec SA object
*/
static void ipsec_sa_destroy(private_kernel_netlink_ipsec_t *this,
ipsec_sa_t *sa)
* Mapping between a policy and an IPsec SA.
*/
struct policy_sa_t {
- /** priority assigned to the policy when installed with this SA */
+ /** Priority assigned to the policy when installed with this SA */
u_int32_t priority;
- /** type of the policy */
+ /** Type of the policy */
policy_type_t type;
- /** assigned SA */
+ /** Assigned SA */
ipsec_sa_t *sa;
};
/**
- * For forward policies we cache the traffic selectors in order to install
+ * For forward policies we also cache the traffic selectors in order to install
* the route.
*/
struct policy_sa_fwd_t {
- /** generic interface */
+ /** Generic interface */
policy_sa_t generic;
- /** source traffic selector of this policy */
+ /** Source traffic selector of this policy */
traffic_selector_t *src_ts;
- /** destination traffic selector of this policy */
+ /** Destination traffic selector of this policy */
traffic_selector_t *dst_ts;
};
/**
- * create a policy_sa(_fwd)_t object
+ * Create a policy_sa(_fwd)_t object
*/
static policy_sa_t *policy_sa_create(private_kernel_netlink_ipsec_t *this,
policy_dir_t dir, policy_type_t type, host_t *src, host_t *dst,
}
/**
- * destroy a policy_sa(_fwd)_t object
+ * Destroy a policy_sa(_fwd)_t object
*/
static void policy_sa_destroy(private_kernel_netlink_ipsec_t *this,
policy_dir_t dir, policy_sa_t *policy)
typedef struct policy_entry_t policy_entry_t;
/**
- * installed kernel policy.
+ * Installed kernel policy.
*/
struct policy_entry_t {
- /** direction of this policy: in, out, forward */
+ /** Direction of this policy: in, out, forward */
u_int8_t direction;
- /** parameters of installed policy */
+ /** Parameters of installed policy */
struct xfrm_selector sel;
- /** optional mark */
+ /** Optional mark */
u_int32_t mark;
- /** associated route installed for this policy */
+ /** Associated route installed for this policy */
route_entry_t *route;
- /** list of SAs this policy is used by, ordered by priority */
+ /** List of SAs this policy is used by, ordered by priority */
linked_list_t *used_by;
};
+/**
+ * Destroy a policy_entry_t object
+ */
static void policy_entry_destroy(private_kernel_netlink_ipsec_t *this,
policy_entry_t *policy)
{
}
/**
- * convert the general ipsec mode to the one defined in xfrm.h
+ * Convert the general ipsec mode to the one defined in xfrm.h
*/
static u_int8_t mode2kernel(ipsec_mode_t mode)
{
}
/**
- * convert a host_t to a struct xfrm_address
+ * Convert a host_t to a struct xfrm_address
*/
static void host2xfrm(host_t *host, xfrm_address_t *xfrm)
{
}
/**
- * convert a struct xfrm_address to a host_t
+ * Convert a struct xfrm_address to a host_t
*/
static host_t* xfrm2host(int family, xfrm_address_t *xfrm, u_int16_t port)
{
}
/**
- * convert a traffic selector address range to subnet and its mask.
+ * Convert a traffic selector address range to subnet and its mask.
*/
static void ts2subnet(traffic_selector_t* ts,
xfrm_address_t *net, u_int8_t *mask)
}
/**
- * convert a traffic selector port range to port/portmask
+ * Convert a traffic selector port range to port/portmask
*/
static void ts2ports(traffic_selector_t* ts,
u_int16_t *port, u_int16_t *mask)
{
- /* linux does not seem to accept complex portmasks. Only
+ /* Linux does not seem to accept complex portmasks. Only
* any or a specific port is allowed. We set to any, if we have
* a port range, or to a specific, if we have one port only.
*/
}
/**
- * convert a pair of traffic_selectors to a xfrm_selector
+ * Convert a pair of traffic_selectors to an xfrm_selector
*/
static struct xfrm_selector ts2selector(traffic_selector_t *src,
traffic_selector_t *dst)
}
/**
- * convert a xfrm_selector to a src|dst traffic_selector
+ * Convert an xfrm_selector to a src|dst traffic_selector
*/
static traffic_selector_t* selector2ts(struct xfrm_selector *sel, bool src)
{
}
/**
- * process a XFRM_MSG_ACQUIRE from kernel
+ * Process a XFRM_MSG_ACQUIRE from kernel
*/
-static void process_acquire(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
+static void process_acquire(private_kernel_netlink_ipsec_t *this,
+ struct nlmsghdr *hdr)
{
- u_int32_t reqid = 0;
- int proto = 0;
- traffic_selector_t *src_ts, *dst_ts;
struct xfrm_user_acquire *acquire;
struct rtattr *rta;
size_t rtasize;
+ traffic_selector_t *src_ts, *dst_ts;
+ u_int32_t reqid = 0;
+ int proto = 0;
acquire = (struct xfrm_user_acquire*)NLMSG_DATA(hdr);
rta = XFRM_RTA(hdr, struct xfrm_user_acquire);
if (rta->rta_type == XFRMA_TMPL)
{
struct xfrm_user_tmpl* tmpl;
-
tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rta);
reqid = tmpl->reqid;
proto = tmpl->id.proto;
}
/**
- * process a XFRM_MSG_EXPIRE from kernel
+ * Process a XFRM_MSG_EXPIRE from kernel
*/
-static void process_expire(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
+static void process_expire(private_kernel_netlink_ipsec_t *this,
+ struct nlmsghdr *hdr)
{
- u_int8_t protocol;
- u_int32_t spi, reqid;
struct xfrm_user_expire *expire;
+ u_int32_t spi, reqid;
+ u_int8_t protocol;
expire = (struct xfrm_user_expire*)NLMSG_DATA(hdr);
protocol = expire->state.id.proto;
}
/**
- * process a XFRM_MSG_MIGRATE from kernel
+ * Process a XFRM_MSG_MIGRATE from kernel
*/
-static void process_migrate(private_kernel_netlink_ipsec_t *this, struct nlmsghdr *hdr)
+static void process_migrate(private_kernel_netlink_ipsec_t *this,
+ struct nlmsghdr *hdr)
{
+ struct xfrm_userpolicy_id *policy_id;
+ struct rtattr *rta;
+ size_t rtasize;
traffic_selector_t *src_ts, *dst_ts;
host_t *local = NULL, *remote = NULL;
host_t *old_src = NULL, *old_dst = NULL;
host_t *new_src = NULL, *new_dst = NULL;
- struct xfrm_userpolicy_id *policy_id;
- struct rtattr *rta;
- size_t rtasize;
u_int32_t reqid = 0;
policy_dir_t dir;
new_dst = xfrm2host(migrate->new_family, &migrate->new_daddr, 0);
reqid = migrate->reqid;
DBG2(DBG_KNL, " migrate %H...%H to %H...%H, reqid {%u}",
- old_src, old_dst, new_src, new_dst, reqid);
+ old_src, old_dst, new_src, new_dst, reqid);
DESTROY_IF(old_src);
DESTROY_IF(old_dst);
DESTROY_IF(new_src);
}
/**
- * process a XFRM_MSG_MAPPING from kernel
+ * Process a XFRM_MSG_MAPPING from kernel
*/
static void process_mapping(private_kernel_netlink_ipsec_t *this,
struct nlmsghdr *hdr)
{
- u_int32_t spi, reqid;
struct xfrm_user_mapping *mapping;
- host_t *host;
+ u_int32_t spi, reqid;
mapping = (struct xfrm_user_mapping*)NLMSG_DATA(hdr);
spi = mapping->id.spi;
if (mapping->id.proto == IPPROTO_ESP)
{
+ host_t *host;
host = xfrm2host(mapping->id.family, &mapping->new_saddr,
mapping->new_sport);
if (host)
process_mapping(this, hdr);
break;
default:
- DBG1(DBG_KNL, "received unknown event from xfrm event socket: %d", hdr->nlmsg_type);
+ DBG1(DBG_KNL, "received unknown event from xfrm event "
+ "socket: %d", hdr->nlmsg_type);
break;
}
hdr = NLMSG_NEXT(hdr, len);
* Get an SPI for a specific protocol from the kernel.
*/
static status_t get_spi_internal(private_kernel_netlink_ipsec_t *this,
- host_t *src, host_t *dst, u_int8_t proto, u_int32_t min, u_int32_t max,
- u_int32_t reqid, u_int32_t *spi)
+ host_t *src, host_t *dst, u_int8_t proto, u_int32_t min, u_int32_t max,
+ u_int32_t reqid, u_int32_t *spi)
{
netlink_buf_t request;
struct nlmsghdr *hdr, *out;
case NLMSG_ERROR:
{
struct nlmsgerr *err = NLMSG_DATA(hdr);
-
DBG1(DBG_KNL, "allocating SPI failed: %s (%d)",
strerror(-err->error), -err->error);
break;
DBG2(DBG_KNL, "getting SPI for reqid {%u}", reqid);
if (get_spi_internal(this, src, dst, protocol,
- 0xc0000000, 0xcFFFFFFF, reqid, spi) != SUCCESS)
+ 0xc0000000, 0xcFFFFFFF, reqid, spi) != SUCCESS)
{
DBG1(DBG_KNL, "unable to get SPI for reqid {%u}", reqid);
return FAILED;
}
DBG2(DBG_KNL, "got SPI %.8x for reqid {%u}", ntohl(*spi), reqid);
-
return SUCCESS;
}
DBG2(DBG_KNL, "getting CPI for reqid {%u}", reqid);
- if (get_spi_internal(this, src, dst,
- IPPROTO_COMP, 0x100, 0xEFFF, reqid, &received_spi) != SUCCESS)
+ if (get_spi_internal(this, src, dst, IPPROTO_COMP,
+ 0x100, 0xEFFF, reqid, &received_spi) != SUCCESS)
{
DBG1(DBG_KNL, "unable to get CPI for reqid {%u}", reqid);
return FAILED;
*cpi = htons((u_int16_t)ntohl(received_spi));
DBG2(DBG_KNL, "got CPI %.4x for reqid {%u}", ntohs(*cpi), reqid);
-
return SUCCESS;
}
if (ipcomp != IPCOMP_NONE && cpi != 0)
{
lifetime_cfg_t lft = {{0,0,0},{0,0,0},{0,0,0}};
- add_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, reqid, mark, tfc,
- &lft, ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED, chunk_empty,
- mode, ipcomp, 0, FALSE, FALSE, inbound, NULL, NULL);
+ add_sa(this, src, dst, htonl(ntohs(cpi)), IPPROTO_COMP, reqid, mark,
+ tfc, &lft, ENCR_UNDEFINED, chunk_empty, AUTH_UNDEFINED,
+ chunk_empty, mode, ipcomp, 0, FALSE, FALSE, inbound, NULL, NULL);
ipcomp = IPCOMP_NONE;
/* use transport mode ESP SA, IPComp uses tunnel mode */
mode = MODE_TRANSPORT;
if (mark.value)
{
- DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u} "
- "(mark %u/0x%8x)", ntohl(spi), reqid, mark.value, mark.mask);
+ DBG2(DBG_KNL, "adding SAD entry with SPI %.8x and reqid {%u} (mark "
+ "%u/0x%8x)", ntohl(spi), reqid, mark.value, mark.mask);
}
else
{
encryption_algorithm_names, enc_alg, enc_key.len * 8);
rthdr->rta_type = XFRMA_ALG_AEAD;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_aead) + enc_key.len);
+ rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_aead) +
+ enc_key.len);
hdr->nlmsg_len += RTA_ALIGN(rthdr->rta_len);
if (hdr->nlmsg_len > sizeof(request))
{
/* the kernel uses SHA256 with 96 bit truncation by default,
* use specified truncation size supported by newer kernels */
rthdr->rta_type = XFRMA_ALG_AUTH_TRUNC;
- rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_auth) + int_key.len);
+ rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo_auth) +
+ int_key.len);
hdr->nlmsg_len += RTA_ALIGN(rthdr->rta_len);
if (hdr->nlmsg_len > sizeof(request))
tmpl->encap_dport = htons(dst->get_port(dst));
memset(&tmpl->encap_oa, 0, sizeof (xfrm_address_t));
/* encap_oa could probably be derived from the
- * traffic selectors [rfc4306, p39]. In the netlink kernel implementation
- * pluto does the same as we do here but it uses encap_oa in the
- * pfkey implementation. BUT as /usr/src/linux/net/key/af_key.c indicates
- * the kernel ignores it anyway
+ * traffic selectors [rfc4306, p39]. In the netlink kernel
+ * implementation pluto does the same as we do here but it uses
+ * encap_oa in the pfkey implementation.
+ * BUT as /usr/src/linux/net/key/af_key.c indicates the kernel ignores
+ * it anyway
* -> does that mean that NAT-T encap doesn't work in transport mode?
* No. The reason the kernel ignores NAT-OA is that it recomputes
- * (or, rather, just ignores) the checksum. If packets pass
- * the IPsec checks it marks them "checksum ok" so OA isn't needed. */
+ * (or, rather, just ignores) the checksum. If packets pass the IPsec
+ * checks it marks them "checksum ok" so OA isn't needed. */
rthdr = XFRM_RTA_NEXT(rthdr);
}
memset(&request, 0, sizeof(request));
DBG2(DBG_KNL, "querying replay state from SAD entry with SPI %.8x",
- ntohl(spi));
+ ntohl(spi));
hdr = (struct nlmsghdr*)request;
hdr->nlmsg_flags = NLM_F_REQUEST;
case NLMSG_ERROR:
{
struct nlmsgerr *err = NLMSG_DATA(hdr);
- DBG1(DBG_KNL, "querying replay state from SAD entry failed: %s (%d)",
- strerror(-err->error), -err->error);
+ DBG1(DBG_KNL, "querying replay state from SAD entry "
+ "failed: %s (%d)", strerror(-err->error),
+ -err->error);
break;
}
default:
}
else
{
- DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x", ntohl(spi));
+ DBG1(DBG_KNL, "unable to delete SAD entry with SPI %.8x",
+ ntohl(spi));
}
return FAILED;
}
/* delete the old SA (without affecting the IPComp SA) */
if (del_sa(this, src, dst, spi, protocol, 0, mark) != SUCCESS)
{
- DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x", ntohl(spi));
+ DBG1(DBG_KNL, "unable to delete old SAD entry with SPI %.8x",
+ ntohl(spi));
goto failed;
}
DBG2(DBG_KNL, "updating SAD entry with SPI %.8x from %#H..%#H to %#H..%#H",
- ntohl(spi), src, dst, new_src, new_dst);
+ ntohl(spi), src, dst, new_src, new_dst);
/* copy over the SA from out to request */
hdr = (struct nlmsghdr*)request;
memcpy(hdr, out, min(out->nlmsg_len, sizeof(request)));
else
{
DBG1(DBG_KNL, "unable to copy replay state from old SAD entry "
- "with SPI %.8x", ntohl(spi));
+ "with SPI %.8x", ntohl(spi));
}
if (this->socket_xfrm->send_ack(this->socket_xfrm, hdr) != SUCCESS)
{
default:
DBG1(DBG_KNL, "unable to install source route for %H",
- route->src_ip);
+ route->src_ip);
/* FALL */
case ALREADY_DONE:
/* route exists, do not uninstall */
{
struct nlmsgerr *err = NLMSG_DATA(hdr);
DBG1(DBG_KNL, "querying policy failed: %s (%d)",
- strerror(-err->error), -err->error);
+ strerror(-err->error), -err->error);
break;
}
default:
if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
{
DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s",
- strerror(errno));
+ strerror(errno));
return FALSE;
}
policy.dir = XFRM_POLICY_IN;
if (setsockopt(fd, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
{
DBG1(DBG_KNL, "unable to set IPSEC_POLICY on socket: %s",
- strerror(errno));
+ strerror(errno));
return FALSE;
}
return TRUE;
projects / strongswan.git / commitdiff