denozord/strongswan-ext
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

- comments and cleanups

Browse Source
This commit is contained in:
Martin Willi
2006-03-02 09:56:30 +00:00
parent 5d187bd234
commit aa5a35a005
6 changed files with 275 additions and 172 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Source/charon/threads/kernel_interface.c
+61 -32
View File
@@ -44,28 +44,34 @@
#define SPD_PRIORITY 1024
#define XFRM_DATA_LENGTH 512
typedef struct xfrm_data_t xfrm_data_t;
/**
* Lenght/Type/data struct for userdata in xfrm
* We dont use the "I-don't-know-where-they-come-from"-structs
* used in the kernel.
*/
struct xfrm_data_t {
/**
* length of the data
*/
u_int16_t length;
/**
* type of data
*/
u_int16_t type;
/**
* and the data itself, for different purposes
*/
union {
/* algorithm */
/** algorithm */
struct xfrm_algo algo;
/* policy tmpl */
/** policy tmpl */
struct xfrm_user_tmpl tmpl[2];
};
};
@@ -84,20 +90,20 @@ struct netlink_message_t {
struct nlmsghdr hdr;
union {
/* error message */
/** error message */
struct nlmsgerr e;
/* message for spi allocation */
/** message for spi allocation */
struct xfrm_userspi_info spi;
/* message for SA manipulation */
/** message for SA manipulation */
struct xfrm_usersa_id sa_id;
/* message for SA installation */
/** message for SA installation */
struct xfrm_usersa_info sa;
/* message for policy manipulation */
/** message for policy manipulation */
struct xfrm_userpolicy_id policy_id;
/* message for policy installation */
/** message for policy installation */
struct xfrm_userpolicy_info policy;
};
u_int8_t data[512];
u_int8_t data[XFRM_DATA_LENGTH];
};
@@ -155,6 +161,12 @@ struct private_kernel_interface_t {
status_t (*send_message) (private_kernel_interface_t *this, netlink_message_t *request, netlink_message_t **response);
};
/**
* In the kernel, algorithms are identified as strings, we use our
* mapping functions...
* Algorithms for encryption.
* TODO: Add missing algorithm strings
*/
mapping_t kernel_encryption_algs_m[] = {
{ENCR_DES_IV64, ""},
{ENCR_DES, "des"},
@@ -170,7 +182,12 @@ mapping_t kernel_encryption_algs_m[] = {
{ENCR_AES_CTR, ""},
{MAPPING_END, NULL}
};
/**
* In the kernel, algorithms are identified as strings, we use our
* mapping functions...
* Algorithms for integrity protection.
* TODO: Add missing algorithm strings
*/
mapping_t kernel_integrity_algs_m[] = {
{AUTH_HMAC_MD5_96, "md5"},
{AUTH_HMAC_SHA1_96, "sha1"},
@@ -180,7 +197,9 @@ mapping_t kernel_integrity_algs_m[] = {
{MAPPING_END, NULL}
};
/**
* Implementation of kernel_interface_t.get_spi.
*/
static status_t get_spi(private_kernel_interface_t *this,
host_t *src, host_t *dest,
protocol_id_t protocol, u_int32_t reqid,
@@ -199,8 +218,8 @@ static status_t get_spi(private_kernel_interface_t *this,
request.spi.info.reqid = reqid;
request.spi.info.id.proto = (protocol == ESP) ? KERNEL_ESP : KERNEL_AH;
request.spi.info.family = PF_INET;
request.spi.min = 100;
request.spi.max = 200;
request.spi.min = 0xc0000000;
request.spi.max = 0xcFFFFFFF;
if (this->send_message(this, &request, &response) != SUCCESS)
{
@@ -225,6 +244,9 @@ static status_t get_spi(private_kernel_interface_t *this,
return status;
}
/**
* Implementation of kernel_interface_t.add_sa.
*/
static status_t add_sa( private_kernel_interface_t *this,
host_t *me,
host_t *other,
@@ -267,11 +289,13 @@ static status_t add_sa( private_kernel_interface_t *this,
data->type = XFRMA_ALG_CRYPT;
data->length = 4 + sizeof(data->algo) + encryption_key.len;
data->algo.alg_key_len = encryption_key.len * 8;
request.hdr.nlmsg_len += data->length;
if (request.hdr.nlmsg_len > sizeof(request))
{
return FAILED;
}
strcpy(data->algo.alg_name, mapping_find(kernel_encryption_algs_m, enc_alg));
memcpy(data->algo.alg_key, encryption_key.ptr, encryption_key.len);
request.hdr.nlmsg_len += data->length;
}
if (int_alg != AUTH_UNDEFINED)
@@ -281,13 +305,16 @@ static status_t add_sa( private_kernel_interface_t *this,
data->type = XFRMA_ALG_AUTH;
data->length = 4 + sizeof(data->algo) + integrity_key.len;
data->algo.alg_key_len = integrity_key.len * 8;
request.hdr.nlmsg_len += data->length;
if (request.hdr.nlmsg_len > sizeof(request))
{
return FAILED;
}
strcpy(data->algo.alg_name, mapping_find(kernel_integrity_algs_m, int_alg));
memcpy(data->algo.alg_key, integrity_key.ptr, integrity_key.len);
request.hdr.nlmsg_len += data->length;
}
/* add IPComp here*/
/* TODO: add IPComp here*/
if (this->send_message(this, &request, &response) != SUCCESS)
{
@@ -343,6 +370,9 @@ static status_t del_sa( private_kernel_interface_t *this,
return SUCCESS;
}
/**
* Implementation of kernel_interface_t.add_policy.
*/
static status_t add_policy(private_kernel_interface_t *this,
host_t *me, host_t *other,
host_t *src, host_t *dst,
@@ -432,6 +462,9 @@ static status_t add_policy(private_kernel_interface_t *this,
return status;
}
/**
* Implementation of kernel_interface_t.del_policy.
*/
static status_t del_policy(private_kernel_interface_t *this,
host_t *me, host_t *other,
host_t *src, host_t *dst,
@@ -477,7 +510,9 @@ static status_t del_policy(private_kernel_interface_t *this,
return status;
}
/**
* Implementation of private_kernel_interface_t.send_message.
*/
static status_t send_message(private_kernel_interface_t *this, netlink_message_t *request, netlink_message_t **response)
{
size_t length;
@@ -528,7 +563,7 @@ static status_t send_message(private_kernel_interface_t *this, netlink_message_t
{
break;
}
/* we should time out, if something goes wrong */
/* TODO: we should time out, if something goes wrong!??? */
pthread_cond_wait(&(this->condvar), &(this->mutex));
}
@@ -537,7 +572,9 @@ static status_t send_message(private_kernel_interface_t *this, netlink_message_t
return SUCCESS;
}
/**
* Implementation of private_kernel_interface_t.receive_messages.
*/
static void receive_messages(private_kernel_interface_t *this)
{
while(TRUE)
@@ -599,8 +636,6 @@ static void receive_messages(private_kernel_interface_t *this)
}
}
/**
* Implementation of kernel_interface_t.destroy.
*/
@@ -613,8 +648,6 @@ static void destroy(private_kernel_interface_t *this)
allocator_free(this);
}
#define ASSIGN(member, function) member = (void*)function
/*
* Described in header.
*/
@@ -626,8 +659,8 @@ 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.del_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t))del_sa;
this->public.del_policy = (status_t(*)(kernel_interface_t*,host_t*,host_t*,host_t*,host_t*,u_int8_t,u_int8_t,int,int))del_policy;
this->public.destroy = (void(*)(kernel_interface_t*)) destroy;
@@ -653,10 +686,6 @@ kernel_interface_t *kernel_interface_create()
charon->kill(charon, "Unable to create netlink thread");
}
//host_t *all = host_create(AF_INET, "0.0.0.0", 500);
//add_policy(this, all, all, all, all, 0, 0, XFRM_POLICY_OUT, 17, FALSE, FALSE, 0);
charon->logger_manager->enable_logger_level(charon->logger_manager, TESTER, FULL);
return (&this->public);
}