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path: root/net/ipv4/cipso_ipv4.c
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Diffstat (limited to 'net/ipv4/cipso_ipv4.c')
-rw-r--r--net/ipv4/cipso_ipv4.c168
1 files changed, 69 insertions, 99 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index f3957cfaed42..08144f8fc911 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -819,8 +819,7 @@ static int cipso_v4_map_cat_rbm_valid(const struct cipso_v4_doi *doi_def,
/**
* cipso_v4_map_cat_rbm_hton - Perform a category mapping from host to network
* @doi_def: the DOI definition
- * @host_cat: the category bitmap in host format
- * @host_cat_len: the length of the host's category bitmap in bytes
+ * @secattr: the security attributes
* @net_cat: the zero'd out category bitmap in network/CIPSO format
* @net_cat_len: the length of the CIPSO bitmap in bytes
*
@@ -831,61 +830,51 @@ static int cipso_v4_map_cat_rbm_valid(const struct cipso_v4_doi *doi_def,
*
*/
static int cipso_v4_map_cat_rbm_hton(const struct cipso_v4_doi *doi_def,
- const unsigned char *host_cat,
- u32 host_cat_len,
+ const struct netlbl_lsm_secattr *secattr,
unsigned char *net_cat,
u32 net_cat_len)
{
int host_spot = -1;
- u32 net_spot;
+ u32 net_spot = CIPSO_V4_INV_CAT;
u32 net_spot_max = 0;
- u32 host_clen_bits = host_cat_len * 8;
u32 net_clen_bits = net_cat_len * 8;
- u32 host_cat_size;
- u32 *host_cat_array;
+ u32 host_cat_size = 0;
+ u32 *host_cat_array = NULL;
- switch (doi_def->type) {
- case CIPSO_V4_MAP_PASS:
- net_spot_max = host_cat_len;
- while (net_spot_max > 0 && host_cat[net_spot_max - 1] == 0)
- net_spot_max--;
- if (net_spot_max > net_cat_len)
- return -EINVAL;
- memcpy(net_cat, host_cat, net_spot_max);
- return net_spot_max;
- case CIPSO_V4_MAP_STD:
+ if (doi_def->type == CIPSO_V4_MAP_STD) {
host_cat_size = doi_def->map.std->cat.local_size;
host_cat_array = doi_def->map.std->cat.local;
- for (;;) {
- host_spot = cipso_v4_bitmap_walk(host_cat,
- host_clen_bits,
- host_spot + 1,
- 1);
- if (host_spot < 0)
- break;
+ }
+
+ for (;;) {
+ host_spot = netlbl_secattr_catmap_walk(secattr->mls_cat,
+ host_spot + 1);
+ if (host_spot < 0)
+ break;
+
+ switch (doi_def->type) {
+ case CIPSO_V4_MAP_PASS:
+ net_spot = host_spot;
+ break;
+ case CIPSO_V4_MAP_STD:
if (host_spot >= host_cat_size)
return -EPERM;
-
net_spot = host_cat_array[host_spot];
if (net_spot >= CIPSO_V4_INV_CAT)
return -EPERM;
- if (net_spot >= net_clen_bits)
- return -ENOSPC;
- cipso_v4_bitmap_setbit(net_cat, net_spot, 1);
-
- if (net_spot > net_spot_max)
- net_spot_max = net_spot;
+ break;
}
+ if (net_spot >= net_clen_bits)
+ return -ENOSPC;
+ cipso_v4_bitmap_setbit(net_cat, net_spot, 1);
- if (host_spot == -2)
- return -EFAULT;
-
- if (++net_spot_max % 8)
- return net_spot_max / 8 + 1;
- return net_spot_max / 8;
+ if (net_spot > net_spot_max)
+ net_spot_max = net_spot;
}
- return -EINVAL;
+ if (++net_spot_max % 8)
+ return net_spot_max / 8 + 1;
+ return net_spot_max / 8;
}
/**
@@ -893,66 +882,59 @@ static int cipso_v4_map_cat_rbm_hton(const struct cipso_v4_doi *doi_def,
* @doi_def: the DOI definition
* @net_cat: the category bitmap in network/CIPSO format
* @net_cat_len: the length of the CIPSO bitmap in bytes
- * @host_cat: the zero'd out category bitmap in host format
- * @host_cat_len: the length of the host's category bitmap in bytes
+ * @secattr: the security attributes
*
* Description:
* Perform a label mapping to translate a CIPSO bitmap to the correct local
- * MLS category bitmap using the given DOI definition. Returns the minimum
- * size in bytes of the host bitmap on success, negative values otherwise.
+ * MLS category bitmap using the given DOI definition. Returns zero on
+ * success, negative values on failure.
*
*/
static int cipso_v4_map_cat_rbm_ntoh(const struct cipso_v4_doi *doi_def,
const unsigned char *net_cat,
u32 net_cat_len,
- unsigned char *host_cat,
- u32 host_cat_len)
+ struct netlbl_lsm_secattr *secattr)
{
- u32 host_spot;
- u32 host_spot_max = 0;
+ int ret_val;
int net_spot = -1;
+ u32 host_spot = CIPSO_V4_INV_CAT;
u32 net_clen_bits = net_cat_len * 8;
- u32 host_clen_bits = host_cat_len * 8;
- u32 net_cat_size;
- u32 *net_cat_array;
+ u32 net_cat_size = 0;
+ u32 *net_cat_array = NULL;
- switch (doi_def->type) {
- case CIPSO_V4_MAP_PASS:
- if (net_cat_len > host_cat_len)
- return -EINVAL;
- memcpy(host_cat, net_cat, net_cat_len);
- return net_cat_len;
- case CIPSO_V4_MAP_STD:
+ if (doi_def->type == CIPSO_V4_MAP_STD) {
net_cat_size = doi_def->map.std->cat.cipso_size;
net_cat_array = doi_def->map.std->cat.cipso;
- for (;;) {
- net_spot = cipso_v4_bitmap_walk(net_cat,
- net_clen_bits,
- net_spot + 1,
- 1);
- if (net_spot < 0)
- break;
- if (net_spot >= net_cat_size ||
- net_cat_array[net_spot] >= CIPSO_V4_INV_CAT)
- return -EPERM;
+ }
+ for (;;) {
+ net_spot = cipso_v4_bitmap_walk(net_cat,
+ net_clen_bits,
+ net_spot + 1,
+ 1);
+ if (net_spot < 0) {
+ if (net_spot == -2)
+ return -EFAULT;
+ return 0;
+ }
+
+ switch (doi_def->type) {
+ case CIPSO_V4_MAP_PASS:
+ host_spot = net_spot;
+ break;
+ case CIPSO_V4_MAP_STD:
+ if (net_spot >= net_cat_size)
+ return -EPERM;
host_spot = net_cat_array[net_spot];
if (host_spot >= CIPSO_V4_INV_CAT)
return -EPERM;
- if (host_spot >= host_clen_bits)
- return -ENOSPC;
- cipso_v4_bitmap_setbit(host_cat, host_spot, 1);
-
- if (host_spot > host_spot_max)
- host_spot_max = host_spot;
+ break;
}
-
- if (net_spot == -2)
- return -EFAULT;
-
- if (++host_spot_max % 8)
- return host_spot_max / 8 + 1;
- return host_spot_max / 8;
+ ret_val = netlbl_secattr_catmap_setbit(secattr->mls_cat,
+ host_spot,
+ GFP_ATOMIC);
+ if (ret_val != 0)
+ return ret_val;
}
return -EINVAL;
@@ -1016,8 +998,7 @@ static int cipso_v4_gentag_rbm(const struct cipso_v4_doi *doi_def,
if (secattr->flags & NETLBL_SECATTR_MLS_CAT) {
ret_val = cipso_v4_map_cat_rbm_hton(doi_def,
- secattr->mls_cat,
- secattr->mls_cat_len,
+ secattr,
&buffer[4],
buffer_len - 4);
if (ret_val < 0)
@@ -1067,31 +1048,20 @@ static int cipso_v4_parsetag_rbm(const struct cipso_v4_doi *doi_def,
secattr->flags |= NETLBL_SECATTR_MLS_LVL;
if (tag_len > 4) {
- switch (doi_def->type) {
- case CIPSO_V4_MAP_PASS:
- secattr->mls_cat_len = tag_len - 4;
- break;
- case CIPSO_V4_MAP_STD:
- secattr->mls_cat_len =
- doi_def->map.std->cat.local_size;
- break;
- }
- secattr->mls_cat = kzalloc(secattr->mls_cat_len, GFP_ATOMIC);
+ secattr->mls_cat = netlbl_secattr_catmap_alloc(GFP_ATOMIC);
if (secattr->mls_cat == NULL)
return -ENOMEM;
ret_val = cipso_v4_map_cat_rbm_ntoh(doi_def,
&tag[4],
tag_len - 4,
- secattr->mls_cat,
- secattr->mls_cat_len);
- if (ret_val < 0) {
- kfree(secattr->mls_cat);
+ secattr);
+ if (ret_val != 0) {
+ netlbl_secattr_catmap_free(secattr->mls_cat);
return ret_val;
- } else if (ret_val > 0) {
- secattr->mls_cat_len = ret_val;
- secattr->flags |= NETLBL_SECATTR_MLS_CAT;
}
+
+ secattr->flags |= NETLBL_SECATTR_MLS_CAT;
}
return 0;
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-13 18:46:07 +0300