1 |
/* |
/* |
2 |
* fs/tomoyo_network.c |
* security/ccsecurity/network.c |
3 |
* |
* |
4 |
* Implementation of the Domain-Based Mandatory Access Control. |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
* Version: 1.7.0-pre 2009/08/24 |
|
* |
|
|
* Version: 1.6.4 2008/09/03 |
|
7 |
* |
* |
8 |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
9 |
* See README.ccs for ChangeLog. |
* See README.ccs for ChangeLog. |
10 |
* |
* |
11 |
*/ |
*/ |
12 |
|
|
|
#include <linux/ccs_common.h> |
|
|
#include <linux/tomoyo.h> |
|
|
#include <linux/realpath.h> |
|
13 |
#include <linux/net.h> |
#include <linux/net.h> |
14 |
#include <linux/inet.h> |
#include <linux/inet.h> |
15 |
#include <linux/in.h> |
#include <linux/in.h> |
16 |
#include <linux/in6.h> |
#include <linux/in6.h> |
17 |
|
#include <net/ip.h> |
18 |
|
#include <net/ipv6.h> |
19 |
|
#include <net/udp.h> |
20 |
|
#include "internal.h" |
21 |
|
|
22 |
/** |
/** |
23 |
* audit_network_log - Audit network log. |
* ccs_audit_network_log - Audit network log. |
24 |
* |
* |
25 |
* @is_ipv6: True if @address is an IPv6 address. |
* @r: Pointer to "struct ccs_request_info". |
26 |
* @operation: The name of operation. |
* @operation: The name of operation. |
27 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
28 |
* @port: Port number. |
* @port: Port number. |
29 |
* @is_granted: True if this is a granted log. |
* @is_granted: True if this is a granted log. |
|
* @profile: Profile number used. |
|
|
* @mode: Access control mode used. |
|
30 |
* |
* |
31 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
32 |
*/ |
*/ |
33 |
static int audit_network_log(const bool is_ipv6, const char *operation, |
static int ccs_audit_network_log(struct ccs_request_info *r, |
34 |
const char *address, const u16 port, |
const char *operation, const char *address, |
35 |
const bool is_granted, |
const u16 port, const bool is_granted) |
36 |
const u8 profile, const u8 mode) |
{ |
37 |
{ |
if (!is_granted) |
38 |
char *buf; |
ccs_warn_log(r, "%s %s %u", operation, address, port); |
39 |
int len = 256; |
return ccs_write_audit_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
40 |
int len2; |
"%s %s %u\n", operation, address, port); |
|
if (ccs_can_save_audit_log(is_granted) < 0) |
|
|
return -ENOMEM; |
|
|
buf = ccs_init_audit_log(&len, profile, mode, NULL); |
|
|
if (!buf) |
|
|
return -ENOMEM; |
|
|
len2 = strlen(buf); |
|
|
snprintf(buf + len2, len - len2 - 1, KEYWORD_ALLOW_NETWORK "%s %s %u\n", |
|
|
operation, address, port); |
|
|
return ccs_write_audit_log(buf, is_granted); |
|
41 |
} |
} |
42 |
|
|
43 |
/** |
/** |
44 |
* save_ipv6_address - Keep the given IPv6 address on the RAM. |
* ccs_parse_ip_address - Parse an IP address. |
|
* |
|
|
* @addr: Pointer to "struct in6_addr". |
|
|
* |
|
|
* Returns pointer to "struct in6_addr" on success, NULL otherwise. |
|
|
* |
|
|
* The RAM is shared, so NEVER try to modify or kfree() the returned address. |
|
|
*/ |
|
|
static const struct in6_addr *save_ipv6_address(const struct in6_addr *addr) |
|
|
{ |
|
|
static const u8 block_size = 16; |
|
|
struct addr_list { |
|
|
/* Workaround for gcc 4.3's bug. */ |
|
|
struct in6_addr addr[16]; /* = block_size */ |
|
|
struct list1_head list; |
|
|
u32 in_use_count; |
|
|
}; |
|
|
static LIST1_HEAD(address_list); |
|
|
struct addr_list *ptr; |
|
|
static DEFINE_MUTEX(lock); |
|
|
u8 i = block_size; |
|
|
if (!addr) |
|
|
return NULL; |
|
|
mutex_lock(&lock); |
|
|
list1_for_each_entry(ptr, &address_list, list) { |
|
|
for (i = 0; i < ptr->in_use_count; i++) { |
|
|
if (!memcmp(&ptr->addr[i], addr, sizeof(*addr))) |
|
|
goto ok; |
|
|
} |
|
|
if (i < block_size) |
|
|
break; |
|
|
} |
|
|
if (i == block_size) { |
|
|
ptr = ccs_alloc_element(sizeof(*ptr)); |
|
|
if (!ptr) |
|
|
goto ok; |
|
|
list1_add_tail_mb(&ptr->list, &address_list); |
|
|
i = 0; |
|
|
} |
|
|
ptr->addr[ptr->in_use_count++] = *addr; |
|
|
ok: |
|
|
mutex_unlock(&lock); |
|
|
return ptr ? &ptr->addr[i] : NULL; |
|
|
} |
|
|
|
|
|
/* The list for "struct address_group_entry". */ |
|
|
static LIST1_HEAD(address_group_list); |
|
|
|
|
|
/** |
|
|
* update_address_group_entry - Update "struct address_group_entry" list. |
|
45 |
* |
* |
46 |
* @group_name: The name of address group. |
* @address: String to parse. |
47 |
* @is_ipv6: True if @min_address and @max_address are IPv6 addresses. |
* @min: Pointer to store min address. |
48 |
* @min_address: Start of IPv4 or IPv6 address range. |
* @max: Pointer to store max address. |
|
* @max_address: End of IPv4 or IPv6 address range. |
|
|
* @is_delete: True if it is a delete request. |
|
49 |
* |
* |
50 |
* Returns 0 on success, negative value otherwise. |
* Returns 2 if @address is an IPv6, 1 if @address is an IPv4, 0 otherwise. |
51 |
*/ |
*/ |
52 |
static int update_address_group_entry(const char *group_name, |
int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
|
const bool is_ipv6, |
|
|
const u16 *min_address, |
|
|
const u16 *max_address, |
|
|
const bool is_delete) |
|
|
{ |
|
|
static DEFINE_MUTEX(lock); |
|
|
struct address_group_entry *new_group; |
|
|
struct address_group_entry *group; |
|
|
struct address_group_member *new_member; |
|
|
struct address_group_member *member; |
|
|
const struct path_info *saved_group_name; |
|
|
const struct in6_addr *saved_min_address = NULL; |
|
|
const struct in6_addr *saved_max_address = NULL; |
|
|
int error = -ENOMEM; |
|
|
bool found = false; |
|
|
if (!ccs_is_correct_path(group_name, 0, 0, 0, __func__) || |
|
|
!group_name[0]) |
|
|
return -EINVAL; |
|
|
saved_group_name = ccs_save_name(group_name); |
|
|
if (!saved_group_name) |
|
|
return -ENOMEM; |
|
|
if (!is_ipv6) |
|
|
goto not_ipv6; |
|
|
saved_min_address |
|
|
= save_ipv6_address((struct in6_addr *) min_address); |
|
|
saved_max_address |
|
|
= save_ipv6_address((struct in6_addr *) max_address); |
|
|
if (!saved_min_address || !saved_max_address) |
|
|
return -ENOMEM; |
|
|
not_ipv6: |
|
|
mutex_lock(&lock); |
|
|
list1_for_each_entry(group, &address_group_list, list) { |
|
|
if (saved_group_name != group->group_name) |
|
|
continue; |
|
|
list1_for_each_entry(member, &group->address_group_member_list, |
|
|
list) { |
|
|
if (member->is_ipv6 != is_ipv6) |
|
|
continue; |
|
|
if (is_ipv6) { |
|
|
if (member->min.ipv6 != saved_min_address || |
|
|
member->max.ipv6 != saved_max_address) |
|
|
continue; |
|
|
} else { |
|
|
if (member->min.ipv4 != *(u32 *) min_address || |
|
|
member->max.ipv4 != *(u32 *) max_address) |
|
|
continue; |
|
|
} |
|
|
member->is_deleted = is_delete; |
|
|
error = 0; |
|
|
goto out; |
|
|
} |
|
|
found = true; |
|
|
break; |
|
|
} |
|
|
if (is_delete) { |
|
|
error = -ENOENT; |
|
|
goto out; |
|
|
} |
|
|
if (!found) { |
|
|
new_group = ccs_alloc_element(sizeof(*new_group)); |
|
|
if (!new_group) |
|
|
goto out; |
|
|
INIT_LIST1_HEAD(&new_group->address_group_member_list); |
|
|
new_group->group_name = saved_group_name; |
|
|
list1_add_tail_mb(&new_group->list, &address_group_list); |
|
|
group = new_group; |
|
|
} |
|
|
new_member = ccs_alloc_element(sizeof(*new_member)); |
|
|
if (!new_member) |
|
|
goto out; |
|
|
new_member->is_ipv6 = is_ipv6; |
|
|
if (is_ipv6) { |
|
|
new_member->min.ipv6 = saved_min_address; |
|
|
new_member->max.ipv6 = saved_max_address; |
|
|
} else { |
|
|
new_member->min.ipv4 = *(u32 *) min_address; |
|
|
new_member->max.ipv4 = *(u32 *) max_address; |
|
|
} |
|
|
list1_add_tail_mb(&new_member->list, &group->address_group_member_list); |
|
|
error = 0; |
|
|
out: |
|
|
mutex_unlock(&lock); |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
|
|
return error; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_write_address_group_policy - Write "struct address_group_entry" list. |
|
|
* |
|
|
* @data: String to parse. |
|
|
* @is_delete: True if it is a delete request. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
int ccs_write_address_group_policy(char *data, const bool is_delete) |
|
53 |
{ |
{ |
54 |
u8 count; |
int count = sscanf(address, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
55 |
bool is_ipv6; |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
56 |
u16 min_address[8]; |
&min[0], &min[1], &min[2], &min[3], |
57 |
u16 max_address[8]; |
&min[4], &min[5], &min[6], &min[7], |
58 |
char *cp = strchr(data, ' '); |
&max[0], &max[1], &max[2], &max[3], |
59 |
if (!cp) |
&max[4], &max[5], &max[6], &max[7]); |
|
return -EINVAL; |
|
|
*cp++ = '\0'; |
|
|
count = sscanf(cp, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
|
|
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
|
|
&min_address[0], &min_address[1], |
|
|
&min_address[2], &min_address[3], |
|
|
&min_address[4], &min_address[5], |
|
|
&min_address[6], &min_address[7], |
|
|
&max_address[0], &max_address[1], |
|
|
&max_address[2], &max_address[3], |
|
|
&max_address[4], &max_address[5], |
|
|
&max_address[6], &max_address[7]); |
|
60 |
if (count == 8 || count == 16) { |
if (count == 8 || count == 16) { |
61 |
u8 i; |
u8 i; |
62 |
|
if (count == 8) |
63 |
|
memmove(max, min, sizeof(u16) * 8); |
64 |
for (i = 0; i < 8; i++) { |
for (i = 0; i < 8; i++) { |
65 |
min_address[i] = htons(min_address[i]); |
min[i] = htons(min[i]); |
66 |
max_address[i] = htons(max_address[i]); |
max[i] = htons(max[i]); |
67 |
} |
} |
68 |
if (count == 8) |
return 2; |
69 |
memmove(max_address, min_address, sizeof(min_address)); |
} |
70 |
is_ipv6 = true; |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
71 |
goto ok; |
&min[0], &min[1], &min[2], &min[3], |
72 |
} |
&max[0], &max[1], &max[2], &max[3]); |
|
count = sscanf(cp, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
|
|
&min_address[0], &min_address[1], |
|
|
&min_address[2], &min_address[3], |
|
|
&max_address[0], &max_address[1], |
|
|
&max_address[2], &max_address[3]); |
|
73 |
if (count == 4 || count == 8) { |
if (count == 4 || count == 8) { |
74 |
u32 ip = ((((u8) min_address[0]) << 24) |
u32 ip = htonl((((u8) min[0]) << 24) + (((u8) min[1]) << 16) |
75 |
+ (((u8) min_address[1]) << 16) |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
76 |
+ (((u8) min_address[2]) << 8) |
memmove(min, &ip, sizeof(ip)); |
|
+ (u8) min_address[3]); |
|
|
*(u32 *) min_address = ip; |
|
77 |
if (count == 8) |
if (count == 8) |
78 |
ip = ((((u8) max_address[0]) << 24) |
ip = htonl((((u8) max[0]) << 24) + (((u8) max[1]) << 16) |
79 |
+ (((u8) max_address[1]) << 16) |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
80 |
+ (((u8) max_address[2]) << 8) |
memmove(max, &ip, sizeof(ip)); |
81 |
+ (u8) max_address[3]); |
return 1; |
|
*(u32 *) max_address = ip; |
|
|
is_ipv6 = false; |
|
|
goto ok; |
|
|
} |
|
|
return -EINVAL; |
|
|
ok: |
|
|
return update_address_group_entry(data, is_ipv6, |
|
|
min_address, max_address, is_delete); |
|
|
} |
|
|
|
|
|
/** |
|
|
* find_or_assign_new_address_group - Create address group. |
|
|
* |
|
|
* @group_name: The name of address group. |
|
|
* |
|
|
* Returns pointer to "struct address_group_entry" on success, NULL otherwise. |
|
|
*/ |
|
|
static struct address_group_entry * |
|
|
find_or_assign_new_address_group(const char *group_name) |
|
|
{ |
|
|
u8 i; |
|
|
struct address_group_entry *group; |
|
|
for (i = 0; i <= 1; i++) { |
|
|
list1_for_each_entry(group, &address_group_list, list) { |
|
|
if (!strcmp(group_name, group->group_name->name)) |
|
|
return group; |
|
|
} |
|
|
if (!i) { |
|
|
const u16 dummy[2] = { 0, 0 }; |
|
|
update_address_group_entry(group_name, false, |
|
|
dummy, dummy, false); |
|
|
update_address_group_entry(group_name, false, |
|
|
dummy, dummy, true); |
|
|
} |
|
82 |
} |
} |
83 |
return NULL; |
return 0; |
|
} |
|
|
|
|
|
/** |
|
|
* address_matches_to_group - Check whether the given address matches members of the given address group. |
|
|
* |
|
|
* @is_ipv6: True if @address is an IPv6 address. |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @group: Pointer to "struct address_group_entry". |
|
|
* |
|
|
* Returns true if @address matches addresses in @group group, false otherwise. |
|
|
*/ |
|
|
static bool address_matches_to_group(const bool is_ipv6, const u32 *address, |
|
|
const struct address_group_entry *group) |
|
|
{ |
|
|
struct address_group_member *member; |
|
|
const u32 ip = ntohl(*address); |
|
|
list1_for_each_entry(member, &group->address_group_member_list, list) { |
|
|
if (member->is_deleted) |
|
|
continue; |
|
|
if (member->is_ipv6) { |
|
|
if (is_ipv6 && |
|
|
memcmp(member->min.ipv6, address, 16) <= 0 && |
|
|
memcmp(address, member->max.ipv6, 16) <= 0) |
|
|
return true; |
|
|
} else { |
|
|
if (!is_ipv6 && |
|
|
member->min.ipv4 <= ip && ip <= member->max.ipv4) |
|
|
return true; |
|
|
} |
|
|
} |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_read_address_group_policy - Read "struct address_group_entry" list. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
bool ccs_read_address_group_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list1_head *gpos; |
|
|
struct list1_head *mpos; |
|
|
list1_for_each_cookie(gpos, head->read_var1, &address_group_list) { |
|
|
struct address_group_entry *group; |
|
|
group = list1_entry(gpos, struct address_group_entry, list); |
|
|
list1_for_each_cookie(mpos, head->read_var2, |
|
|
&group->address_group_member_list) { |
|
|
char buf[128]; |
|
|
struct address_group_member *member; |
|
|
member = list1_entry(mpos, struct address_group_member, |
|
|
list); |
|
|
if (member->is_deleted) |
|
|
continue; |
|
|
if (member->is_ipv6) { |
|
|
const struct in6_addr *min_address |
|
|
= member->min.ipv6; |
|
|
const struct in6_addr *max_address |
|
|
= member->max.ipv6; |
|
|
ccs_print_ipv6(buf, sizeof(buf), min_address); |
|
|
if (min_address != max_address) { |
|
|
int len; |
|
|
char *cp = strchr(buf, '\0'); |
|
|
*cp++ = '-'; |
|
|
len = strlen(buf); |
|
|
ccs_print_ipv6(cp, sizeof(buf) - len, |
|
|
max_address); |
|
|
} |
|
|
} else { |
|
|
const u32 min_address = member->min.ipv4; |
|
|
const u32 max_address = member->max.ipv4; |
|
|
memset(buf, 0, sizeof(buf)); |
|
|
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", |
|
|
HIPQUAD(min_address)); |
|
|
if (min_address != max_address) { |
|
|
const int len = strlen(buf); |
|
|
snprintf(buf + len, |
|
|
sizeof(buf) - 1 - len, |
|
|
"-%u.%u.%u.%u", |
|
|
HIPQUAD(max_address)); |
|
|
} |
|
|
} |
|
|
if (!ccs_io_printf(head, KEYWORD_ADDRESS_GROUP |
|
|
"%s %s\n", group->group_name->name, |
|
|
buf)) |
|
|
goto out; |
|
|
} |
|
|
} |
|
|
return true; |
|
|
out: |
|
|
return false; |
|
84 |
} |
} |
85 |
|
|
86 |
#if !defined(NIP6) |
#if !defined(NIP6) |
87 |
#define NIP6(addr) \ |
#define NIP6(addr) \ |
88 |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
89 |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
90 |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
91 |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
92 |
#endif |
#endif |
93 |
|
|
94 |
/** |
/** |
118 |
{ |
{ |
119 |
const char *keyword = "unknown"; |
const char *keyword = "unknown"; |
120 |
switch (operation) { |
switch (operation) { |
121 |
case NETWORK_ACL_UDP_BIND: |
case CCS_NETWORK_UDP_BIND: |
122 |
keyword = "UDP bind"; |
keyword = "UDP bind"; |
123 |
break; |
break; |
124 |
case NETWORK_ACL_UDP_CONNECT: |
case CCS_NETWORK_UDP_CONNECT: |
125 |
keyword = "UDP connect"; |
keyword = "UDP connect"; |
126 |
break; |
break; |
127 |
case NETWORK_ACL_TCP_BIND: |
case CCS_NETWORK_TCP_BIND: |
128 |
keyword = "TCP bind"; |
keyword = "TCP bind"; |
129 |
break; |
break; |
130 |
case NETWORK_ACL_TCP_LISTEN: |
case CCS_NETWORK_TCP_LISTEN: |
131 |
keyword = "TCP listen"; |
keyword = "TCP listen"; |
132 |
break; |
break; |
133 |
case NETWORK_ACL_TCP_CONNECT: |
case CCS_NETWORK_TCP_CONNECT: |
134 |
keyword = "TCP connect"; |
keyword = "TCP connect"; |
135 |
break; |
break; |
136 |
case NETWORK_ACL_TCP_ACCEPT: |
case CCS_NETWORK_TCP_ACCEPT: |
137 |
keyword = "TCP accept"; |
keyword = "TCP accept"; |
138 |
break; |
break; |
139 |
case NETWORK_ACL_RAW_BIND: |
case CCS_NETWORK_RAW_BIND: |
140 |
keyword = "RAW bind"; |
keyword = "RAW bind"; |
141 |
break; |
break; |
142 |
case NETWORK_ACL_RAW_CONNECT: |
case CCS_NETWORK_RAW_CONNECT: |
143 |
keyword = "RAW connect"; |
keyword = "RAW connect"; |
144 |
break; |
break; |
145 |
} |
} |
147 |
} |
} |
148 |
|
|
149 |
/** |
/** |
150 |
* update_network_entry - Update "struct ip_network_acl_record" list. |
* ccs_network_entry2 - Check permission for network operation. |
151 |
* |
* |
152 |
* @operation: Type of operation. |
* @is_ipv6: True if @address is an IPv6 address. |
153 |
* @record_type: Type of address. |
* @operation: Type of operation. |
154 |
* @group: Pointer to "struct address_group_entry". May be NULL. |
* @address: An IPv4 or IPv6 address. |
155 |
* @min_address: Start of IPv4 or IPv6 address range. |
* @port: Port number. |
|
* @max_address: End of IPv4 or IPv6 address range. |
|
|
* @min_port: Start of port number range. |
|
|
* @max_port: End of port number range. |
|
|
* @domain: Pointer to "struct domain_info". |
|
|
* @condition: Pointer to "struct condition_list". May be NULL. |
|
|
* @is_delete: True if it is a delete request. |
|
156 |
* |
* |
157 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
158 |
|
* |
159 |
|
* Caller holds ccs_read_lock(). |
160 |
*/ |
*/ |
161 |
static int update_network_entry(const u8 operation, const u8 record_type, |
static int ccs_network_entry2(const bool is_ipv6, const u8 operation, |
162 |
const struct address_group_entry *group, |
const u32 *address, const u16 port) |
163 |
const u32 *min_address, const u32 *max_address, |
{ |
164 |
const u16 min_port, const u16 max_port, |
struct ccs_request_info r; |
165 |
struct domain_info *domain, |
struct ccs_acl_info *ptr; |
166 |
const struct condition_list *condition, |
const char *keyword = ccs_net2keyword(operation); |
167 |
const bool is_delete) |
const u16 perm = 1 << operation; |
|
{ |
|
|
struct acl_info *ptr; |
|
|
struct ip_network_acl_record *acl; |
|
|
int error = -ENOMEM; |
|
168 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
/* using host byte order to allow u32 comparison than memcmp().*/ |
169 |
const u32 min_ip = ntohl(*min_address); |
const u32 ip = ntohl(*address); |
170 |
const u32 max_ip = ntohl(*max_address); |
int error; |
171 |
const struct in6_addr *saved_min_address = NULL; |
char buf[64]; |
172 |
const struct in6_addr *saved_max_address = NULL; |
ccs_assert_read_lock(); |
173 |
if (!domain) |
if (ccs_init_request_info(&r, NULL, |
174 |
return -EINVAL; |
CCS_MAC_NETWORK_UDP_BIND + operation) |
175 |
if (record_type != IP_RECORD_TYPE_IPv6) |
== CCS_MAC_MODE_DISABLED) |
176 |
goto not_ipv6; |
return 0; |
177 |
saved_min_address = save_ipv6_address((struct in6_addr *) min_address); |
memset(buf, 0, sizeof(buf)); |
178 |
saved_max_address = save_ipv6_address((struct in6_addr *) max_address); |
if (is_ipv6) |
179 |
if (!saved_min_address || !saved_max_address) |
ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
180 |
return -ENOMEM; |
address); |
181 |
not_ipv6: |
else |
182 |
mutex_lock(&domain_acl_lock); |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
183 |
if (is_delete) |
do { |
184 |
goto delete; |
error = -EPERM; |
185 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
186 |
if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) |
struct ccs_ip_network_acl *acl; |
187 |
continue; |
if (ptr->is_deleted || |
188 |
if (ccs_get_condition_part(ptr) != condition) |
ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
189 |
continue; |
continue; |
190 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
acl = container_of(ptr, struct ccs_ip_network_acl, |
191 |
if (acl->operation_type != operation || |
head); |
192 |
acl->record_type != record_type || |
if (!(acl->perm & perm)) |
193 |
acl->min_port != min_port || max_port != acl->max_port) |
continue; |
194 |
continue; |
if (!ccs_compare_number_union(port, &acl->port) || |
195 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
!ccs_condition(&r, ptr)) |
196 |
if (acl->u.group != group) |
continue; |
197 |
continue; |
switch (acl->address_type) { |
198 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
199 |
if (acl->u.ipv4.min != min_ip || |
if (!ccs_address_matches_group(is_ipv6, |
200 |
max_ip != acl->u.ipv4.max) |
address, |
201 |
continue; |
acl->address. |
202 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
group)) |
203 |
if (acl->u.ipv6.min != saved_min_address || |
continue; |
204 |
saved_max_address != acl->u.ipv6.max) |
break; |
205 |
continue; |
case CCS_IP_ADDRESS_TYPE_IPv4: |
206 |
} |
if (is_ipv6 || ip < acl->address.ipv4.min || |
207 |
error = ccs_add_domain_acl(NULL, ptr); |
acl->address.ipv4.max < ip) |
208 |
goto out; |
continue; |
209 |
} |
break; |
210 |
/* Not found. Append it to the tail. */ |
default: |
211 |
acl = ccs_alloc_acl_element(TYPE_IP_NETWORK_ACL, condition); |
if (!is_ipv6 || |
212 |
if (!acl) |
memcmp(acl->address.ipv6.min, address, 16) |
213 |
goto out; |
> 0 || |
214 |
acl->operation_type = operation; |
memcmp(address, acl->address.ipv6.max, 16) |
215 |
acl->record_type = record_type; |
> 0) |
216 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
continue; |
217 |
acl->u.group = group; |
break; |
218 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
} |
219 |
acl->u.ipv4.min = min_ip; |
r.cond = ptr->cond; |
220 |
acl->u.ipv4.max = max_ip; |
error = 0; |
221 |
} else { |
break; |
|
acl->u.ipv6.min = saved_min_address; |
|
|
acl->u.ipv6.max = saved_max_address; |
|
|
} |
|
|
acl->min_port = min_port; |
|
|
acl->max_port = max_port; |
|
|
error = ccs_add_domain_acl(domain, &acl->head); |
|
|
goto out; |
|
|
delete: |
|
|
error = -ENOENT; |
|
|
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
|
|
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
|
|
continue; |
|
|
if (ccs_get_condition_part(ptr) != condition) |
|
|
continue; |
|
|
acl = container_of(ptr, struct ip_network_acl_record, head); |
|
|
if (acl->operation_type != operation || |
|
|
acl->record_type != record_type || |
|
|
acl->min_port != min_port || max_port != acl->max_port) |
|
|
continue; |
|
|
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
|
|
if (acl->u.group != group) |
|
|
continue; |
|
|
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
|
|
if (acl->u.ipv4.min != min_ip || |
|
|
max_ip != acl->u.ipv4.max) |
|
|
continue; |
|
|
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
|
|
if (acl->u.ipv6.min != saved_min_address || |
|
|
saved_max_address != acl->u.ipv6.max) |
|
|
continue; |
|
222 |
} |
} |
223 |
error = ccs_del_domain_acl(ptr); |
ccs_audit_network_log(&r, keyword, buf, port, !error); |
224 |
break; |
if (!error) |
225 |
} |
break; |
226 |
out: |
error = ccs_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
227 |
mutex_unlock(&domain_acl_lock); |
"%s %s %u\n", keyword, buf, port); |
228 |
|
} while (error == 1); |
229 |
|
if (r.mode != CCS_MAC_MODE_ENFORCING) |
230 |
|
error = 0; |
231 |
return error; |
return error; |
232 |
} |
} |
233 |
|
|
234 |
/** |
/** |
235 |
* check_network_entry - Check permission for network operation. |
* ccs_network_entry - Check permission for network operation. |
236 |
* |
* |
237 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
238 |
* @operation: Type of operation. |
* @operation: Type of operation. |
241 |
* |
* |
242 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
243 |
*/ |
*/ |
244 |
static int check_network_entry(const bool is_ipv6, const u8 operation, |
static int ccs_network_entry(const bool is_ipv6, const u8 operation, |
245 |
const u32 *address, const u16 port) |
const u32 *address, const u16 port) |
246 |
{ |
{ |
247 |
struct domain_info * const domain = current->domain_info; |
const int idx = ccs_read_lock(); |
248 |
struct acl_info *ptr; |
const int error = ccs_network_entry2(is_ipv6, operation, |
249 |
const char *keyword = ccs_net2keyword(operation); |
address, port); |
250 |
const u8 profile = current->domain_info->profile; |
ccs_read_unlock(idx); |
251 |
const u8 mode = ccs_check_flags(CCS_TOMOYO_MAC_FOR_NETWORK); |
return error; |
|
const bool is_enforce = (mode == 3); |
|
|
/* using host byte order to allow u32 comparison than memcmp().*/ |
|
|
const u32 ip = ntohl(*address); |
|
|
bool found = false; |
|
|
char buf[64]; |
|
|
if (!mode) |
|
|
return 0; |
|
|
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
|
|
struct ip_network_acl_record *acl; |
|
|
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
|
|
continue; |
|
|
acl = container_of(ptr, struct ip_network_acl_record, head); |
|
|
if (acl->operation_type != operation || port < acl->min_port || |
|
|
acl->max_port < port || !ccs_check_condition(ptr, NULL)) |
|
|
continue; |
|
|
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
|
|
if (!address_matches_to_group(is_ipv6, address, |
|
|
acl->u.group)) |
|
|
continue; |
|
|
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
|
|
if (is_ipv6 || |
|
|
ip < acl->u.ipv4.min || acl->u.ipv4.max < ip) |
|
|
continue; |
|
|
} else { |
|
|
if (!is_ipv6 || |
|
|
memcmp(acl->u.ipv6.min, address, 16) > 0 || |
|
|
memcmp(address, acl->u.ipv6.max, 16) > 0) |
|
|
continue; |
|
|
} |
|
|
ccs_update_condition(ptr); |
|
|
found = true; |
|
|
break; |
|
|
} |
|
|
memset(buf, 0, sizeof(buf)); |
|
|
if (is_ipv6) |
|
|
ccs_print_ipv6(buf, sizeof(buf), |
|
|
(const struct in6_addr *) address); |
|
|
else |
|
|
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
|
|
audit_network_log(is_ipv6, keyword, buf, port, found, profile, mode); |
|
|
if (found) |
|
|
return 0; |
|
|
if (ccs_verbose_mode()) |
|
|
printk(KERN_WARNING "TOMOYO-%s: %s to %s %u denied for %s\n", |
|
|
ccs_get_msg(is_enforce), keyword, buf, port, |
|
|
ccs_get_last_name(domain)); |
|
|
if (is_enforce) |
|
|
return ccs_check_supervisor(NULL, KEYWORD_ALLOW_NETWORK "%s " |
|
|
"%s %u\n", keyword, buf, port); |
|
|
if (mode == 1 && ccs_check_domain_quota(domain)) |
|
|
update_network_entry(operation, is_ipv6 ? |
|
|
IP_RECORD_TYPE_IPv6 : IP_RECORD_TYPE_IPv4, |
|
|
NULL, address, address, port, port, domain, |
|
|
NULL, 0); |
|
|
return 0; |
|
252 |
} |
} |
253 |
|
|
254 |
/** |
/** |
255 |
* ccs_write_network_policy - Write "struct ip_network_acl_record" list. |
* ccs_write_network_policy - Write "struct ccs_ip_network_acl" list. |
256 |
* |
* |
257 |
* @data: String to parse. |
* @data: String to parse. |
258 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
259 |
* @condition: Pointer to "struct condition_list". May be NULL. |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
260 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
261 |
* |
* |
262 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
263 |
*/ |
*/ |
264 |
int ccs_write_network_policy(char *data, struct domain_info *domain, |
int ccs_write_network_policy(char *data, struct ccs_domain_info *domain, |
265 |
const struct condition_list *condition, |
struct ccs_condition *condition, |
266 |
const bool is_delete) |
const bool is_delete) |
267 |
{ |
{ |
268 |
u8 sock_type; |
struct ccs_ip_network_acl *entry = NULL; |
269 |
u8 operation; |
struct ccs_acl_info *ptr; |
270 |
u8 record_type; |
struct ccs_ip_network_acl e = { |
271 |
|
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
272 |
|
.head.cond = condition, |
273 |
|
}; |
274 |
u16 min_address[8]; |
u16 min_address[8]; |
275 |
u16 max_address[8]; |
u16 max_address[8]; |
276 |
struct address_group_entry *group = NULL; |
int error = is_delete ? -ENOENT : -ENOMEM; |
277 |
u16 min_port; |
u8 sock_type; |
278 |
u16 max_port; |
char *w[4]; |
279 |
u8 count; |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
280 |
char *cp1 = strchr(data, ' '); |
return -EINVAL; |
281 |
char *cp2; |
if (!strcmp(w[0], "TCP")) |
|
if (!cp1) |
|
|
goto out; |
|
|
cp1++; |
|
|
if (!strncmp(data, "TCP ", 4)) |
|
282 |
sock_type = SOCK_STREAM; |
sock_type = SOCK_STREAM; |
283 |
else if (!strncmp(data, "UDP ", 4)) |
else if (!strcmp(w[0], "UDP")) |
284 |
sock_type = SOCK_DGRAM; |
sock_type = SOCK_DGRAM; |
285 |
else if (!strncmp(data, "RAW ", 4)) |
else if (!strcmp(w[0], "RAW")) |
286 |
sock_type = SOCK_RAW; |
sock_type = SOCK_RAW; |
287 |
else |
else |
288 |
goto out; |
return -EINVAL; |
289 |
cp2 = strchr(cp1, ' '); |
if (!strcmp(w[1], "bind")) |
|
if (!cp2) |
|
|
goto out; |
|
|
cp2++; |
|
|
if (!strncmp(cp1, "bind ", 5)) |
|
290 |
switch (sock_type) { |
switch (sock_type) { |
291 |
case SOCK_STREAM: |
case SOCK_STREAM: |
292 |
operation = NETWORK_ACL_TCP_BIND; |
e.perm = 1 << CCS_NETWORK_TCP_BIND; |
293 |
break; |
break; |
294 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
295 |
operation = NETWORK_ACL_UDP_BIND; |
e.perm = 1 << CCS_NETWORK_UDP_BIND; |
296 |
break; |
break; |
297 |
default: |
default: |
298 |
operation = NETWORK_ACL_RAW_BIND; |
e.perm = 1 << CCS_NETWORK_RAW_BIND; |
299 |
|
break; |
300 |
} |
} |
301 |
else if (!strncmp(cp1, "connect ", 8)) |
else if (!strcmp(w[1], "connect")) |
302 |
switch (sock_type) { |
switch (sock_type) { |
303 |
case SOCK_STREAM: |
case SOCK_STREAM: |
304 |
operation = NETWORK_ACL_TCP_CONNECT; |
e.perm = 1 << CCS_NETWORK_TCP_CONNECT; |
305 |
break; |
break; |
306 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
307 |
operation = NETWORK_ACL_UDP_CONNECT; |
e.perm = 1 << CCS_NETWORK_UDP_CONNECT; |
308 |
break; |
break; |
309 |
default: |
default: |
310 |
operation = NETWORK_ACL_RAW_CONNECT; |
e.perm = 1 << CCS_NETWORK_RAW_CONNECT; |
311 |
|
break; |
312 |
} |
} |
313 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "listen ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "listen")) |
314 |
operation = NETWORK_ACL_TCP_LISTEN; |
e.perm = 1 << CCS_NETWORK_TCP_LISTEN; |
315 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "accept ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "accept")) |
316 |
operation = NETWORK_ACL_TCP_ACCEPT; |
e.perm = 1 << CCS_NETWORK_TCP_ACCEPT; |
317 |
else |
else |
318 |
|
return -EINVAL; |
319 |
|
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
320 |
|
case 2: |
321 |
|
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
322 |
|
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
323 |
|
min_address); |
324 |
|
e.address.ipv6.max = ccs_get_ipv6_address((struct in6_addr *) |
325 |
|
max_address); |
326 |
|
if (!e.address.ipv6.min || !e.address.ipv6.max) |
327 |
|
goto out; |
328 |
|
break; |
329 |
|
case 1: |
330 |
|
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
331 |
|
/* use host byte order to allow u32 comparison.*/ |
332 |
|
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
333 |
|
e.address.ipv4.max = ntohl(*(u32 *) max_address); |
334 |
|
break; |
335 |
|
default: |
336 |
|
if (w[2][0] != '@') |
337 |
|
return -EINVAL; |
338 |
|
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
339 |
|
e.address.group = ccs_get_address_group(w[2] + 1); |
340 |
|
if (!e.address.group) |
341 |
|
return -ENOMEM; |
342 |
|
break; |
343 |
|
} |
344 |
|
if (!ccs_parse_number_union(w[3], &e.port)) |
345 |
goto out; |
goto out; |
346 |
cp1 = strchr(cp2, ' '); |
if (!is_delete) |
347 |
if (!cp1) |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
348 |
goto out; |
mutex_lock(&ccs_policy_lock); |
349 |
*cp1++ = '\0'; |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
350 |
count = sscanf(cp2, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
struct ccs_ip_network_acl *acl = |
351 |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
container_of(ptr, struct ccs_ip_network_acl, |
352 |
&min_address[0], &min_address[1], |
head); |
353 |
&min_address[2], &min_address[3], |
if (ptr->type != CCS_TYPE_IP_NETWORK_ACL || |
354 |
&min_address[4], &min_address[5], |
ptr->cond != condition || |
355 |
&min_address[6], &min_address[7], |
ccs_memcmp(acl, &e, offsetof(typeof(e), address_type), |
356 |
&max_address[0], &max_address[1], |
sizeof(e))) |
357 |
&max_address[2], &max_address[3], |
continue; |
358 |
&max_address[4], &max_address[5], |
if (is_delete) { |
359 |
&max_address[6], &max_address[7]); |
acl->perm &= ~e.perm; |
360 |
if (count == 8 || count == 16) { |
if (!acl->perm) |
361 |
u8 i; |
ptr->is_deleted = true; |
362 |
for (i = 0; i < 8; i++) { |
} else { |
363 |
min_address[i] = htons(min_address[i]); |
if (ptr->is_deleted) |
364 |
max_address[i] = htons(max_address[i]); |
acl->perm = 0; |
365 |
|
acl->perm |= e.perm; |
366 |
|
ptr->is_deleted = false; |
367 |
} |
} |
368 |
if (count == 8) |
error = 0; |
369 |
memmove(max_address, min_address, sizeof(min_address)); |
break; |
370 |
record_type = IP_RECORD_TYPE_IPv6; |
} |
371 |
goto ok; |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
372 |
} |
ccs_add_domain_acl(domain, &entry->head); |
373 |
count = sscanf(cp2, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
entry = NULL; |
374 |
&min_address[0], &min_address[1], |
error = 0; |
|
&min_address[2], &min_address[3], |
|
|
&max_address[0], &max_address[1], |
|
|
&max_address[2], &max_address[3]); |
|
|
if (count == 4 || count == 8) { |
|
|
u32 ip = htonl((((u8) min_address[0]) << 24) |
|
|
+ (((u8) min_address[1]) << 16) |
|
|
+ (((u8) min_address[2]) << 8) |
|
|
+ (u8) min_address[3]); |
|
|
*(u32 *) min_address = ip; |
|
|
if (count == 8) |
|
|
ip = htonl((((u8) max_address[0]) << 24) |
|
|
+ (((u8) max_address[1]) << 16) |
|
|
+ (((u8) max_address[2]) << 8) |
|
|
+ (u8) max_address[3]); |
|
|
*(u32 *) max_address = ip; |
|
|
record_type = IP_RECORD_TYPE_IPv4; |
|
|
goto ok; |
|
|
} |
|
|
if (*cp2 == '@') { |
|
|
group = find_or_assign_new_address_group(cp2 + 1); |
|
|
if (!group) |
|
|
return -ENOMEM; |
|
|
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
|
|
goto ok; |
|
375 |
} |
} |
376 |
|
mutex_unlock(&ccs_policy_lock); |
377 |
out: |
out: |
378 |
return -EINVAL; |
if (w[2][0] == '@') |
379 |
ok: |
ccs_put_address_group(e.address.group); |
380 |
if (strchr(cp1, ' ')) |
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
381 |
goto out; |
ccs_put_ipv6_address(e.address.ipv6.min); |
382 |
count = sscanf(cp1, "%hu-%hu", &min_port, &max_port); |
ccs_put_ipv6_address(e.address.ipv6.max); |
383 |
if (count != 1 && count != 2) |
} |
384 |
goto out; |
ccs_put_number_union(&e.port); |
385 |
if (count == 1) |
kfree(entry); |
386 |
max_port = min_port; |
return error; |
|
return update_network_entry(operation, record_type, group, |
|
|
(u32 *) min_address, (u32 *) max_address, |
|
|
min_port, max_port, domain, condition, |
|
|
is_delete); |
|
387 |
} |
} |
388 |
|
|
389 |
/** |
/** |
390 |
* ccs_check_network_listen_acl - Check permission for listen() operation. |
* ccs_network_listen_acl - Check permission for listen() operation. |
391 |
* |
* |
392 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
393 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
395 |
* |
* |
396 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
397 |
*/ |
*/ |
398 |
int ccs_check_network_listen_acl(const _Bool is_ipv6, const u8 *address, |
static inline int ccs_network_listen_acl(const bool is_ipv6, |
399 |
const u16 port) |
const u8 *address, |
400 |
|
const u16 port) |
401 |
{ |
{ |
402 |
return check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, |
return ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
403 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
404 |
} |
} |
405 |
|
|
406 |
/** |
/** |
407 |
* ccs_check_network_connect_acl - Check permission for connect() operation. |
* ccs_network_connect_acl - Check permission for connect() operation. |
408 |
* |
* |
409 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
410 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
413 |
* |
* |
414 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
415 |
*/ |
*/ |
416 |
int ccs_check_network_connect_acl(const _Bool is_ipv6, const int sock_type, |
static inline int ccs_network_connect_acl(const bool is_ipv6, |
417 |
const u8 *address, const u16 port) |
const int sock_type, |
418 |
|
const u8 *address, |
419 |
|
const u16 port) |
420 |
{ |
{ |
421 |
u8 operation; |
u8 operation; |
422 |
switch (sock_type) { |
switch (sock_type) { |
423 |
case SOCK_STREAM: |
case SOCK_STREAM: |
424 |
operation = NETWORK_ACL_TCP_CONNECT; |
operation = CCS_NETWORK_TCP_CONNECT; |
425 |
break; |
break; |
426 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
427 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
428 |
break; |
break; |
429 |
default: |
default: |
430 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
431 |
} |
} |
432 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_network_entry(is_ipv6, operation, |
433 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
434 |
} |
} |
435 |
|
|
436 |
/** |
/** |
437 |
* ccs_check_network_bind_acl - Check permission for bind() operation. |
* ccs_network_bind_acl - Check permission for bind() operation. |
438 |
* |
* |
439 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
440 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
443 |
* |
* |
444 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
445 |
*/ |
*/ |
446 |
int ccs_check_network_bind_acl(const _Bool is_ipv6, const int sock_type, |
static int ccs_network_bind_acl(const bool is_ipv6, const int sock_type, |
447 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
448 |
{ |
{ |
449 |
u8 operation; |
u8 operation; |
450 |
switch (sock_type) { |
switch (sock_type) { |
451 |
case SOCK_STREAM: |
case SOCK_STREAM: |
452 |
operation = NETWORK_ACL_TCP_BIND; |
operation = CCS_NETWORK_TCP_BIND; |
453 |
break; |
break; |
454 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
455 |
operation = NETWORK_ACL_UDP_BIND; |
operation = CCS_NETWORK_UDP_BIND; |
456 |
break; |
break; |
457 |
default: |
default: |
458 |
operation = NETWORK_ACL_RAW_BIND; |
operation = CCS_NETWORK_RAW_BIND; |
459 |
} |
} |
460 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_network_entry(is_ipv6, operation, |
461 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
462 |
} |
} |
463 |
|
|
464 |
/** |
/** |
465 |
* ccs_check_network_accept_acl - Check permission for accept() operation. |
* ccs_network_accept_acl - Check permission for accept() operation. |
466 |
* |
* |
467 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
468 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
470 |
* |
* |
471 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
472 |
*/ |
*/ |
473 |
int ccs_check_network_accept_acl(const _Bool is_ipv6, const u8 *address, |
static inline int ccs_network_accept_acl(const bool is_ipv6, |
474 |
const u16 port) |
const u8 *address, |
475 |
|
const u16 port) |
476 |
{ |
{ |
477 |
int retval; |
int retval; |
478 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
479 |
retval = check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, |
retval = ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_ACCEPT, |
480 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
481 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
482 |
return retval; |
return retval; |
483 |
} |
} |
484 |
|
|
485 |
/** |
/** |
486 |
* ccs_check_network_sendmsg_acl - Check permission for sendmsg() operation. |
* ccs_network_sendmsg_acl - Check permission for sendmsg() operation. |
487 |
* |
* |
488 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
489 |
* @sock_type: Type of socket. (UDP or RAW) |
* @sock_type: Type of socket. (UDP or RAW) |
492 |
* |
* |
493 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
494 |
*/ |
*/ |
495 |
int ccs_check_network_sendmsg_acl(const _Bool is_ipv6, const int sock_type, |
static inline int ccs_network_sendmsg_acl(const bool is_ipv6, |
496 |
const u8 *address, const u16 port) |
const int sock_type, |
497 |
|
const u8 *address, |
498 |
|
const u16 port) |
499 |
{ |
{ |
500 |
u8 operation; |
u8 operation; |
501 |
if (sock_type == SOCK_DGRAM) |
if (sock_type == SOCK_DGRAM) |
502 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
503 |
else |
else |
504 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
505 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_network_entry(is_ipv6, operation, |
506 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
507 |
} |
} |
508 |
|
|
509 |
/** |
/** |
510 |
* ccs_check_network_recvmsg_acl - Check permission for recvmsg() operation. |
* ccs_network_recvmsg_acl - Check permission for recvmsg() operation. |
511 |
* |
* |
512 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
513 |
* @sock_type: Type of socket. (UDP or RAW) |
* @sock_type: Type of socket. (UDP or RAW) |
516 |
* |
* |
517 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
518 |
*/ |
*/ |
519 |
int ccs_check_network_recvmsg_acl(const _Bool is_ipv6, const int sock_type, |
static inline int ccs_network_recvmsg_acl(const bool is_ipv6, |
520 |
const u8 *address, const u16 port) |
const int sock_type, |
521 |
|
const u8 *address, |
522 |
|
const u16 port) |
523 |
{ |
{ |
524 |
int retval; |
int retval; |
525 |
const u8 operation |
const u8 operation |
526 |
= (sock_type == SOCK_DGRAM) ? |
= (sock_type == SOCK_DGRAM) ? |
527 |
NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
CCS_NETWORK_UDP_CONNECT : CCS_NETWORK_RAW_CONNECT; |
528 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
529 |
retval = check_network_entry(is_ipv6, operation, (const u32 *) address, |
retval = ccs_network_entry(is_ipv6, operation, |
530 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
531 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
532 |
return retval; |
return retval; |
533 |
} |
} |
534 |
|
|
535 |
|
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
536 |
|
|
537 |
|
/* Check permission for creating a socket. */ |
538 |
|
int ccs_socket_create_permission(int family, int type, int protocol) |
539 |
|
{ |
540 |
|
int error = 0; |
541 |
|
/* Nothing to do if I am a kernel service. */ |
542 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
543 |
|
return 0; |
544 |
|
if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET)) |
545 |
|
return -EPERM; |
546 |
|
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
547 |
|
return -EPERM; |
548 |
|
if (family != PF_INET && family != PF_INET6) |
549 |
|
return 0; |
550 |
|
switch (type) { |
551 |
|
case SOCK_STREAM: |
552 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CREATE)) |
553 |
|
error = -EPERM; |
554 |
|
break; |
555 |
|
case SOCK_DGRAM: |
556 |
|
if (!ccs_capable(CCS_USE_INET_DGRAM_SOCKET)) |
557 |
|
error = -EPERM; |
558 |
|
break; |
559 |
|
case SOCK_RAW: |
560 |
|
if (!ccs_capable(CCS_USE_INET_RAW_SOCKET)) |
561 |
|
error = -EPERM; |
562 |
|
break; |
563 |
|
} |
564 |
|
return error; |
565 |
|
} |
566 |
|
|
567 |
|
/* Check permission for listening a TCP socket. */ |
568 |
|
int ccs_socket_listen_permission(struct socket *sock) |
569 |
|
{ |
570 |
|
int error = 0; |
571 |
|
char addr[MAX_SOCK_ADDR]; |
572 |
|
int addr_len; |
573 |
|
/* Nothing to do if I am a kernel service. */ |
574 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
575 |
|
return 0; |
576 |
|
if (sock->type != SOCK_STREAM) |
577 |
|
return 0; |
578 |
|
switch (sock->sk->sk_family) { |
579 |
|
case PF_INET: |
580 |
|
case PF_INET6: |
581 |
|
break; |
582 |
|
default: |
583 |
|
return 0; |
584 |
|
} |
585 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_LISTEN)) |
586 |
|
return -EPERM; |
587 |
|
if (sock->ops->getname(sock, (struct sockaddr *) addr, &addr_len, 0)) |
588 |
|
return -EPERM; |
589 |
|
switch (((struct sockaddr *) addr)->sa_family) { |
590 |
|
struct sockaddr_in6 *addr6; |
591 |
|
struct sockaddr_in *addr4; |
592 |
|
case AF_INET6: |
593 |
|
addr6 = (struct sockaddr_in6 *) addr; |
594 |
|
error = ccs_network_listen_acl(true, |
595 |
|
addr6->sin6_addr.s6_addr, |
596 |
|
addr6->sin6_port); |
597 |
|
break; |
598 |
|
case AF_INET: |
599 |
|
addr4 = (struct sockaddr_in *) addr; |
600 |
|
error = ccs_network_listen_acl(false, |
601 |
|
(u8 *) &addr4->sin_addr, |
602 |
|
addr4->sin_port); |
603 |
|
break; |
604 |
|
} |
605 |
|
return error; |
606 |
|
} |
607 |
|
|
608 |
|
/* Check permission for setting the remote IP address/port pair of a socket. */ |
609 |
|
int ccs_socket_connect_permission(struct socket *sock, struct sockaddr *addr, |
610 |
|
int addr_len) |
611 |
|
{ |
612 |
|
int error = 0; |
613 |
|
const unsigned int type = sock->type; |
614 |
|
/* Nothing to do if I am a kernel service. */ |
615 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
616 |
|
return 0; |
617 |
|
switch (type) { |
618 |
|
case SOCK_STREAM: |
619 |
|
case SOCK_DGRAM: |
620 |
|
case SOCK_RAW: |
621 |
|
break; |
622 |
|
default: |
623 |
|
return 0; |
624 |
|
} |
625 |
|
switch (addr->sa_family) { |
626 |
|
struct sockaddr_in6 *addr6; |
627 |
|
struct sockaddr_in *addr4; |
628 |
|
u16 port; |
629 |
|
case AF_INET6: |
630 |
|
if (addr_len < SIN6_LEN_RFC2133) |
631 |
|
break; |
632 |
|
addr6 = (struct sockaddr_in6 *) addr; |
633 |
|
if (type != SOCK_RAW) |
634 |
|
port = addr6->sin6_port; |
635 |
|
else |
636 |
|
port = htons(sock->sk->sk_protocol); |
637 |
|
error = ccs_network_connect_acl(true, type, |
638 |
|
addr6->sin6_addr.s6_addr, |
639 |
|
port); |
640 |
|
break; |
641 |
|
case AF_INET: |
642 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
643 |
|
break; |
644 |
|
addr4 = (struct sockaddr_in *) addr; |
645 |
|
if (type != SOCK_RAW) |
646 |
|
port = addr4->sin_port; |
647 |
|
else |
648 |
|
port = htons(sock->sk->sk_protocol); |
649 |
|
error = ccs_network_connect_acl(false, type, |
650 |
|
(u8 *) &addr4->sin_addr, |
651 |
|
port); |
652 |
|
break; |
653 |
|
} |
654 |
|
if (type != SOCK_STREAM) |
655 |
|
return error; |
656 |
|
switch (sock->sk->sk_family) { |
657 |
|
case PF_INET: |
658 |
|
case PF_INET6: |
659 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CONNECT)) |
660 |
|
error = -EPERM; |
661 |
|
break; |
662 |
|
} |
663 |
|
return error; |
664 |
|
} |
665 |
|
|
666 |
|
/* Check permission for setting the local IP address/port pair of a socket. */ |
667 |
|
int ccs_socket_bind_permission(struct socket *sock, struct sockaddr *addr, |
668 |
|
int addr_len) |
669 |
|
{ |
670 |
|
int error = 0; |
671 |
|
const unsigned int type = sock->type; |
672 |
|
/* Nothing to do if I am a kernel service. */ |
673 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
674 |
|
return 0; |
675 |
|
switch (type) { |
676 |
|
case SOCK_STREAM: |
677 |
|
case SOCK_DGRAM: |
678 |
|
case SOCK_RAW: |
679 |
|
break; |
680 |
|
default: |
681 |
|
return 0; |
682 |
|
} |
683 |
|
switch (addr->sa_family) { |
684 |
|
struct sockaddr_in6 *addr6; |
685 |
|
struct sockaddr_in *addr4; |
686 |
|
u16 port; |
687 |
|
case AF_INET6: |
688 |
|
if (addr_len < SIN6_LEN_RFC2133) |
689 |
|
break; |
690 |
|
addr6 = (struct sockaddr_in6 *) addr; |
691 |
|
if (type != SOCK_RAW) |
692 |
|
port = addr6->sin6_port; |
693 |
|
else |
694 |
|
port = htons(sock->sk->sk_protocol); |
695 |
|
error = ccs_network_bind_acl(true, type, |
696 |
|
addr6->sin6_addr.s6_addr, |
697 |
|
port); |
698 |
|
break; |
699 |
|
case AF_INET: |
700 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
701 |
|
break; |
702 |
|
addr4 = (struct sockaddr_in *) addr; |
703 |
|
if (type != SOCK_RAW) |
704 |
|
port = addr4->sin_port; |
705 |
|
else |
706 |
|
port = htons(sock->sk->sk_protocol); |
707 |
|
error = ccs_network_bind_acl(false, type, |
708 |
|
(u8 *) &addr4->sin_addr, |
709 |
|
port); |
710 |
|
break; |
711 |
|
} |
712 |
|
return error; |
713 |
|
} |
714 |
|
|
715 |
|
/* |
716 |
|
* Check permission for accepting a TCP socket. |
717 |
|
* |
718 |
|
* Currently, the LSM hook for this purpose is not provided. |
719 |
|
*/ |
720 |
|
int ccs_socket_accept_permission(struct socket *sock, struct sockaddr *addr) |
721 |
|
{ |
722 |
|
int error = 0; |
723 |
|
int addr_len; |
724 |
|
/* Nothing to do if I am a kernel service. */ |
725 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
726 |
|
return 0; |
727 |
|
switch (sock->sk->sk_family) { |
728 |
|
case PF_INET: |
729 |
|
case PF_INET6: |
730 |
|
break; |
731 |
|
default: |
732 |
|
return 0; |
733 |
|
} |
734 |
|
error = sock->ops->getname(sock, addr, &addr_len, 2); |
735 |
|
if (error) |
736 |
|
return error; |
737 |
|
switch (addr->sa_family) { |
738 |
|
struct sockaddr_in6 *addr6; |
739 |
|
struct sockaddr_in *addr4; |
740 |
|
case AF_INET6: |
741 |
|
addr6 = (struct sockaddr_in6 *) addr; |
742 |
|
error = ccs_network_accept_acl(true, |
743 |
|
addr6->sin6_addr.s6_addr, |
744 |
|
addr6->sin6_port); |
745 |
|
break; |
746 |
|
case AF_INET: |
747 |
|
addr4 = (struct sockaddr_in *) addr; |
748 |
|
error = ccs_network_accept_acl(false, |
749 |
|
(u8 *) &addr4->sin_addr, |
750 |
|
addr4->sin_port); |
751 |
|
break; |
752 |
|
} |
753 |
|
return error; |
754 |
|
} |
755 |
|
|
756 |
|
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
757 |
|
int ccs_socket_sendmsg_permission(struct socket *sock, struct sockaddr *addr, |
758 |
|
int addr_len) |
759 |
|
{ |
760 |
|
int error = 0; |
761 |
|
const int type = sock->type; |
762 |
|
/* Nothing to do if I am a kernel service. */ |
763 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
764 |
|
return 0; |
765 |
|
if (!addr || (type != SOCK_DGRAM && type != SOCK_RAW)) |
766 |
|
return 0; |
767 |
|
switch (addr->sa_family) { |
768 |
|
struct sockaddr_in6 *addr6; |
769 |
|
struct sockaddr_in *addr4; |
770 |
|
u16 port; |
771 |
|
case AF_INET6: |
772 |
|
if (addr_len < SIN6_LEN_RFC2133) |
773 |
|
break; |
774 |
|
addr6 = (struct sockaddr_in6 *) addr; |
775 |
|
if (type == SOCK_DGRAM) |
776 |
|
port = addr6->sin6_port; |
777 |
|
else |
778 |
|
port = htons(sock->sk->sk_protocol); |
779 |
|
error = ccs_network_sendmsg_acl(true, type, |
780 |
|
addr6->sin6_addr.s6_addr, |
781 |
|
port); |
782 |
|
break; |
783 |
|
case AF_INET: |
784 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
785 |
|
break; |
786 |
|
addr4 = (struct sockaddr_in *) addr; |
787 |
|
if (type == SOCK_DGRAM) |
788 |
|
port = addr4->sin_port; |
789 |
|
else |
790 |
|
port = htons(sock->sk->sk_protocol); |
791 |
|
error = ccs_network_sendmsg_acl(false, type, |
792 |
|
(u8 *) &addr4->sin_addr, |
793 |
|
port); |
794 |
|
break; |
795 |
|
} |
796 |
|
return error; |
797 |
|
} |
798 |
|
|
799 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
800 |
|
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
801 |
|
|
802 |
|
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
803 |
|
{ |
804 |
|
return skb->nh.iph; |
805 |
|
} |
806 |
|
|
807 |
|
static inline struct udphdr *udp_hdr(const struct sk_buff *skb) |
808 |
|
{ |
809 |
|
return skb->h.uh; |
810 |
|
} |
811 |
|
|
812 |
|
static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
813 |
|
{ |
814 |
|
return skb->nh.ipv6h; |
815 |
|
} |
816 |
|
|
817 |
|
#endif |
818 |
|
#endif |
819 |
|
|
820 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) |
821 |
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
822 |
|
unsigned int flags) |
823 |
|
{ |
824 |
|
/* Clear queue. */ |
825 |
|
if (flags & MSG_PEEK) { |
826 |
|
int clear = 0; |
827 |
|
spin_lock_irq(&sk->sk_receive_queue.lock); |
828 |
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
829 |
|
__skb_unlink(skb, &sk->sk_receive_queue); |
830 |
|
clear = 1; |
831 |
|
} |
832 |
|
spin_unlock_irq(&sk->sk_receive_queue.lock); |
833 |
|
if (clear) |
834 |
|
kfree_skb(skb); |
835 |
|
} |
836 |
|
skb_free_datagram(sk, skb); |
837 |
|
} |
838 |
|
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16) |
839 |
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
840 |
|
unsigned int flags) |
841 |
|
{ |
842 |
|
/* Clear queue. */ |
843 |
|
if (flags & MSG_PEEK) { |
844 |
|
int clear = 0; |
845 |
|
spin_lock_bh(&sk->sk_receive_queue.lock); |
846 |
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
847 |
|
__skb_unlink(skb, &sk->sk_receive_queue); |
848 |
|
clear = 1; |
849 |
|
} |
850 |
|
spin_unlock_bh(&sk->sk_receive_queue.lock); |
851 |
|
if (clear) |
852 |
|
kfree_skb(skb); |
853 |
|
} |
854 |
|
skb_free_datagram(sk, skb); |
855 |
|
} |
856 |
|
#endif |
857 |
|
|
858 |
|
/* |
859 |
|
* Check permission for receiving a datagram via a UDP or RAW socket. |
860 |
|
* |
861 |
|
* Currently, the LSM hook for this purpose is not provided. |
862 |
|
*/ |
863 |
|
int ccs_socket_recvmsg_permission(struct sock *sk, struct sk_buff *skb, |
864 |
|
const unsigned int flags) |
865 |
|
{ |
866 |
|
int error = 0; |
867 |
|
const unsigned int type = sk->sk_type; |
868 |
|
if (type != SOCK_DGRAM && type != SOCK_RAW) |
869 |
|
return 0; |
870 |
|
/* Nothing to do if I am a kernel service. */ |
871 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
872 |
|
return 0; |
873 |
|
|
874 |
|
switch (sk->sk_family) { |
875 |
|
struct in6_addr sin6; |
876 |
|
struct in_addr sin4; |
877 |
|
u16 port; |
878 |
|
case PF_INET6: |
879 |
|
if (type == SOCK_DGRAM) { /* UDP IPv6 */ |
880 |
|
if (skb->protocol == htons(ETH_P_IP)) { |
881 |
|
ipv6_addr_set(&sin6, 0, 0, htonl(0xffff), |
882 |
|
ip_hdr(skb)->saddr); |
883 |
|
} else { |
884 |
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
885 |
|
} |
886 |
|
port = udp_hdr(skb)->source; |
887 |
|
} else { /* RAW IPv6 */ |
888 |
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
889 |
|
port = htons(sk->sk_protocol); |
890 |
|
} |
891 |
|
error = ccs_network_recvmsg_acl(true, type, |
892 |
|
(u8 *) &sin6, port); |
893 |
|
break; |
894 |
|
case PF_INET: |
895 |
|
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
896 |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
897 |
|
port = udp_hdr(skb)->source; |
898 |
|
} else { /* RAW IPv4 */ |
899 |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
900 |
|
port = htons(sk->sk_protocol); |
901 |
|
} |
902 |
|
error = ccs_network_recvmsg_acl(false, type, |
903 |
|
(u8 *) &sin4, port); |
904 |
|
break; |
905 |
|
} |
906 |
|
if (!error) |
907 |
|
return 0; |
908 |
|
/* |
909 |
|
* Remove from queue if MSG_PEEK is used so that |
910 |
|
* the head message from unwanted source in receive queue will not |
911 |
|
* prevent the caller from picking up next message from wanted source |
912 |
|
* when the caller is using MSG_PEEK flag for picking up. |
913 |
|
*/ |
914 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
915 |
|
if (type == SOCK_DGRAM) |
916 |
|
lock_sock(sk); |
917 |
|
#endif |
918 |
|
skb_kill_datagram(sk, skb, flags); |
919 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
920 |
|
if (type == SOCK_DGRAM) |
921 |
|
release_sock(sk); |
922 |
|
#endif |
923 |
|
/* Hope less harmful than -EPERM. */ |
924 |
|
return -ENOMEM; |
925 |
|
} |
926 |
|
EXPORT_SYMBOL(ccs_socket_recvmsg_permission); |