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netlabel: Add support for creating a CALIPSO protocol domain mapping.

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This extends the NLBL_MGMT_C_ADD and NLBL_MGMT_C_ADDDEF commands
to accept CALIPSO protocol DOIs.

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Huw Davies 2016-06-27 15:02:49 -04:00 committed by Paul Moore
parent e1ce69df7e
commit dc7de73f19
4 changed files with 89 additions and 5 deletions
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43
net/netlabel/netlabel_domainhash.c
View File

@ -37,10 +37,12 @@
#include <linux/slab.h>
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <net/calipso.h>
#include <asm/bug.h>
#include "netlabel_mgmt.h"
#include "netlabel_addrlist.h"
#include "netlabel_calipso.h"
#include "netlabel_domainhash.h"
#include "netlabel_user.h"
@ -223,6 +225,7 @@ static void netlbl_domhsh_audit_add(struct netlbl_dom_map *entry,
{
struct audit_buffer *audit_buf;
struct cipso_v4_doi *cipsov4 = NULL;
struct calipso_doi *calipso = NULL;
u32 type;
audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_ADD, audit_info);
@ -241,12 +244,14 @@ static void netlbl_domhsh_audit_add(struct netlbl_dom_map *entry,
struct netlbl_domaddr6_map *map6;
map6 = netlbl_domhsh_addr6_entry(addr6);
type = map6->def.type;
calipso = map6->def.calipso;
netlbl_af6list_audit_addr(audit_buf, 0, NULL,
&addr6->addr, &addr6->mask);
#endif /* IPv6 */
} else {
type = entry->def.type;
cipsov4 = entry->def.cipso;
calipso = entry->def.calipso;
}
switch (type) {
case NETLBL_NLTYPE_UNLABELED:
@ -258,6 +263,12 @@ static void netlbl_domhsh_audit_add(struct netlbl_dom_map *entry,
" nlbl_protocol=cipsov4 cipso_doi=%u",
cipsov4->doi);
break;
case NETLBL_NLTYPE_CALIPSO:
BUG_ON(calipso == NULL);
audit_log_format(audit_buf,
" nlbl_protocol=calipso calipso_doi=%u",
calipso->doi);
break;
}
audit_log_format(audit_buf, " res=%u", result == 0 ? 1 : 0);
audit_log_end(audit_buf);
@ -291,7 +302,8 @@ static int netlbl_domhsh_validate(const struct netlbl_dom_map *entry)
switch (entry->def.type) {
case NETLBL_NLTYPE_UNLABELED:
if (entry->def.cipso != NULL || entry->def.addrsel != NULL)
if (entry->def.cipso != NULL || entry->def.calipso != NULL ||
entry->def.addrsel != NULL)
return -EINVAL;
break;
case NETLBL_NLTYPE_CIPSOV4:
@ -299,6 +311,11 @@ static int netlbl_domhsh_validate(const struct netlbl_dom_map *entry)
entry->def.cipso == NULL)
return -EINVAL;
break;
case NETLBL_NLTYPE_CALIPSO:
if (entry->family != AF_INET6 ||
entry->def.calipso == NULL)
return -EINVAL;
break;
case NETLBL_NLTYPE_ADDRSELECT:
netlbl_af4list_foreach(iter4, &entry->def.addrsel->list4) {
map4 = netlbl_domhsh_addr4_entry(iter4);
@ -320,6 +337,12 @@ static int netlbl_domhsh_validate(const struct netlbl_dom_map *entry)
map6 = netlbl_domhsh_addr6_entry(iter6);
switch (map6->def.type) {
case NETLBL_NLTYPE_UNLABELED:
if (map6->def.calipso != NULL)
return -EINVAL;
break;
case NETLBL_NLTYPE_CALIPSO:
if (map6->def.calipso == NULL)
return -EINVAL;
break;
default:
return -EINVAL;
@ -599,6 +622,10 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
if (ret_val == 0) {
struct netlbl_af4list *iter4;
struct netlbl_domaddr4_map *map4;
#if IS_ENABLED(CONFIG_IPV6)
struct netlbl_af6list *iter6;
struct netlbl_domaddr6_map *map6;
#endif /* IPv6 */
switch (entry->def.type) {
case NETLBL_NLTYPE_ADDRSELECT:
@ -607,12 +634,22 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
map4 = netlbl_domhsh_addr4_entry(iter4);
cipso_v4_doi_putdef(map4->def.cipso);
}
/* no need to check the IPv6 list since we currently
* support only unlabeled protocols for IPv6 */
#if IS_ENABLED(CONFIG_IPV6)
netlbl_af6list_foreach_rcu(iter6,
&entry->def.addrsel->list6) {
map6 = netlbl_domhsh_addr6_entry(iter6);
calipso_doi_putdef(map6->def.calipso);
}
#endif /* IPv6 */
break;
case NETLBL_NLTYPE_CIPSOV4:
cipso_v4_doi_putdef(entry->def.cipso);
break;
#if IS_ENABLED(CONFIG_IPV6)
case NETLBL_NLTYPE_CALIPSO:
calipso_doi_putdef(entry->def.calipso);
break;
#endif /* IPv6 */
}
call_rcu(&entry->rcu, netlbl_domhsh_free_entry);
}

1
net/netlabel/netlabel_domainhash.h
View File

@ -51,6 +51,7 @@ struct netlbl_dommap_def {
union {
struct netlbl_domaddr_map *addrsel;
struct cipso_v4_doi *cipso;
struct calipso_doi *calipso;
};
};
#define netlbl_domhsh_addr4_entry(iter) \

47
net/netlabel/netlabel_mgmt.c
View File

@ -41,8 +41,10 @@
#include <net/ipv6.h>
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <net/calipso.h>
#include <linux/atomic.h>
#include "netlabel_calipso.h"
#include "netlabel_domainhash.h"
#include "netlabel_user.h"
#include "netlabel_mgmt.h"
@ -73,6 +75,7 @@ static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
[NLBL_MGMT_A_VERSION] = { .type = NLA_U32 },
[NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 },
[NLBL_MGMT_A_FAMILY] = { .type = NLA_U16 },
[NLBL_MGMT_A_CLPDOI] = { .type = NLA_U32 },
};
/*
@ -96,6 +99,9 @@ static int netlbl_mgmt_add_common(struct genl_info *info,
int ret_val = -EINVAL;
struct netlbl_domaddr_map *addrmap = NULL;
struct cipso_v4_doi *cipsov4 = NULL;
#if IS_ENABLED(CONFIG_IPV6)
struct calipso_doi *calipso = NULL;
#endif
u32 tmp_val;
struct netlbl_dom_map *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
@ -137,6 +143,19 @@ static int netlbl_mgmt_add_common(struct genl_info *info,
entry->family = AF_INET;
entry->def.cipso = cipsov4;
break;
#if IS_ENABLED(CONFIG_IPV6)
case NETLBL_NLTYPE_CALIPSO:
if (!info->attrs[NLBL_MGMT_A_CLPDOI])
goto add_free_domain;
tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CLPDOI]);
calipso = calipso_doi_getdef(tmp_val);
if (calipso == NULL)
goto add_free_domain;
entry->family = AF_INET6;
entry->def.calipso = calipso;
break;
#endif /* IPv6 */
default:
goto add_free_domain;
}
@ -232,6 +251,8 @@ static int netlbl_mgmt_add_common(struct genl_info *info,
map->list.mask = *mask;
map->list.valid = 1;
map->def.type = entry->def.type;
if (calipso)
map->def.calipso = calipso;
ret_val = netlbl_af6list_add(&map->list, &addrmap->list6);
if (ret_val != 0) {
@ -255,6 +276,9 @@ add_free_addrmap:
kfree(addrmap);
add_doi_put_def:
cipso_v4_doi_putdef(cipsov4);
#if IS_ENABLED(CONFIG_IPV6)
calipso_doi_putdef(calipso);
#endif
add_free_domain:
kfree(entry->domain);
add_free_entry:
@ -357,6 +381,15 @@ static int netlbl_mgmt_listentry(struct sk_buff *skb,
if (ret_val != 0)
return ret_val;
switch (map6->def.type) {
case NETLBL_NLTYPE_CALIPSO:
ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI,
map6->def.calipso->doi);
if (ret_val != 0)
return ret_val;
break;
}
nla_nest_end(skb, nla_b);
}
#endif /* IPv6 */
@ -364,15 +397,25 @@ static int netlbl_mgmt_listentry(struct sk_buff *skb,
nla_nest_end(skb, nla_a);
break;
case NETLBL_NLTYPE_UNLABELED:
ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type);
ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
entry->def.type);
break;
case NETLBL_NLTYPE_CIPSOV4:
ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type);
ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
entry->def.type);
if (ret_val != 0)
return ret_val;
ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
entry->def.cipso->doi);
break;
case NETLBL_NLTYPE_CALIPSO:
ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
entry->def.type);
if (ret_val != 0)
return ret_val;
ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI,
entry->def.calipso->doi);
break;
}
return ret_val;

3
net/netlabel/netlabel_mgmt.h
View File

@ -223,6 +223,9 @@ enum {
NLBL_MGMT_A_FAMILY,
/* (NLA_U16)
* The address family */
NLBL_MGMT_A_CLPDOI,
/* (NLA_U32)
* the CALIPSO DOI value */
__NLBL_MGMT_A_MAX,
};
#define NLBL_MGMT_A_MAX (__NLBL_MGMT_A_MAX - 1)