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- working policy installation and removal

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This commit is contained in:
Martin Willi
2006-03-01 15:56:51 +00:00
parent fb8aa445d2
commit 5d187bd234
8 changed files with 345 additions and 101 deletions
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Source/charon/threads/kernel_interface.c
+98 -13
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@@ -88,16 +88,14 @@ struct netlink_message_t {
struct nlmsgerr e;
/* message for spi allocation */
struct xfrm_userspi_info spi;
/* message for SA manipulation */
struct xfrm_usersa_id sa_id;
/* message for SA installation */
struct {
struct xfrm_usersa_info sa;
};
struct xfrm_usersa_info sa;
/* message for policy manipulation */
struct xfrm_userpolicy_id id;
struct xfrm_userpolicy_id policy_id;
/* message for policy installation */
struct {
struct xfrm_userpolicy_info policy;
};
struct xfrm_userpolicy_info policy;
};
u_int8_t data[512];
};
@@ -308,6 +306,43 @@ static status_t add_sa( private_kernel_interface_t *this,
return SUCCESS;
}
static status_t del_sa( private_kernel_interface_t *this,
host_t *dst,
u_int32_t spi,
protocol_id_t protocol)
{
netlink_message_t request, *response;
memset(&request, 0, sizeof(request));
status_t status;
request.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
request.hdr.nlmsg_type = XFRM_MSG_DELSA;
request.sa_id.daddr = dst->get_xfrm_addr(dst);
request.sa_id.spi = spi;
request.sa_id.proto = (protocol == ESP) ? KERNEL_ESP : KERNEL_AH;
request.sa_id.family = dst->get_family(dst);
request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.sa_id)));
if (this->send_message(this, &request, &response) != SUCCESS)
{
status = FAILED;
}
else if (response->hdr.nlmsg_type != NLMSG_ERROR)
{
status = FAILED;
}
else if (response->e.error)
{
status = FAILED;
}
allocator_free(response);
return SUCCESS;
}
static status_t add_policy(private_kernel_interface_t *this,
host_t *me, host_t *other,
host_t *src, host_t *dst,
@@ -332,7 +367,10 @@ static status_t add_policy(private_kernel_interface_t *this,
request.policy.sel.prefixlen_d = dst_hostbits;
request.policy.sel.proto = upper_proto;
request.policy.sel.family = src->get_family(src);
request.hdr.nlmsg_type = XFRM_MSG_NEWPOLICY;
request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.policy)));
request.policy.dir = direction;
request.policy.priority = SPD_PRIORITY;
request.policy.action = XFRM_POLICY_ALLOW;
@@ -342,9 +380,6 @@ static status_t add_policy(private_kernel_interface_t *this,
request.policy.lft.soft_packet_limit = XFRM_INF;
request.policy.lft.hard_byte_limit = XFRM_INF;
request.policy.lft.hard_packet_limit = XFRM_INF;
request.hdr.nlmsg_type = XFRM_MSG_NEWPOLICY;
request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.policy)));
if (esp || ah)
{
@@ -358,7 +393,7 @@ static status_t add_policy(private_kernel_interface_t *this,
data->tmpl[tmpl_pos].id.proto = KERNEL_ESP;
data->tmpl[tmpl_pos].aalgos = data->tmpl[tmpl_pos].ealgos = data->tmpl[tmpl_pos].calgos = ~0;
data->tmpl[tmpl_pos].mode = TRUE;
data->tmpl[tmpl_pos].saddr = me->get_xfrm_addr(me);
data->tmpl[tmpl_pos].id.daddr = me->get_xfrm_addr(other);
@@ -370,7 +405,7 @@ static status_t add_policy(private_kernel_interface_t *this,
data->tmpl[tmpl_pos].id.proto = KERNEL_AH;
data->tmpl[tmpl_pos].aalgos = data->tmpl[tmpl_pos].ealgos = data->tmpl[tmpl_pos].calgos = ~0;
data->tmpl[tmpl_pos].mode = TRUE;
data->tmpl[tmpl_pos].saddr = me->get_xfrm_addr(me);
data->tmpl[tmpl_pos].id.daddr = other->get_xfrm_addr(other);
@@ -397,6 +432,51 @@ static status_t add_policy(private_kernel_interface_t *this,
return status;
}
static status_t del_policy(private_kernel_interface_t *this,
host_t *me, host_t *other,
host_t *src, host_t *dst,
u_int8_t src_hostbits, u_int8_t dst_hostbits,
int direction, int upper_proto)
{
netlink_message_t request, *response;
status_t status = SUCCESS;
memset(&request, 0, sizeof(request));
request.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
request.policy_id.sel.sport = htons(src->get_port(src));
request.policy_id.sel.dport = htons(dst->get_port(dst));
request.policy_id.sel.sport_mask = (request.policy.sel.sport) ? ~0 : 0;
request.policy_id.sel.dport_mask = (request.policy.sel.dport) ? ~0 : 0;
request.policy_id.sel.saddr = src->get_xfrm_addr(src);
request.policy_id.sel.daddr = dst->get_xfrm_addr(dst);
request.policy_id.sel.prefixlen_s = src_hostbits;
request.policy_id.sel.prefixlen_d = dst_hostbits;
request.policy_id.sel.proto = upper_proto;
request.policy_id.sel.family = src->get_family(src);
request.policy_id.dir = direction;
request.hdr.nlmsg_type = XFRM_MSG_DELPOLICY;
request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.policy_id)));
if (this->send_message(this, &request, &response) != SUCCESS)
{
status = FAILED;
}
else if (response->hdr.nlmsg_type != NLMSG_ERROR)
{
status = FAILED;
}
else if (response->e.error)
{
status = FAILED;
}
allocator_free(response);
return status;
}
static status_t send_message(private_kernel_interface_t *this, netlink_message_t *request, netlink_message_t **response)
{
@@ -533,6 +613,8 @@ static void destroy(private_kernel_interface_t *this)
allocator_free(this);
}
#define ASSIGN(member, function) member = (void*)function
/*
* Described in header.
*/
@@ -544,6 +626,9 @@ kernel_interface_t *kernel_interface_create()
this->public.get_spi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi;
this->public.add_sa = (status_t(*)(kernel_interface_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,encryption_algorithm_t,chunk_t,integrity_algorithm_t,chunk_t,bool))add_sa;
this->public.add_policy = (status_t(*)(kernel_interface_t*,host_t*, host_t*,host_t*,host_t*,u_int8_t,u_int8_t,int,int,bool,bool,u_int32_t))add_policy;
ASSIGN(this->public.del_sa, del_sa);
ASSIGN(this->public.del_policy, del_policy);
this->public.destroy = (void(*)(kernel_interface_t*)) destroy;
/* private members */