1 |
/* |
/* |
2 |
* fs/tomoyo_network.c |
* security/ccsecurity/network.c |
3 |
* |
* |
4 |
* Implementation of the Domain-Based Mandatory Access Control. |
* Copyright (C) 2005-2010 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
* Version: 1.7.2 2010/04/01 |
|
* |
|
|
* Version: 1.6.5-pre 2008/11/04 |
|
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 |
* @r: Pointer to "struct ccs_request_info". |
* @r: Pointer to "struct ccs_request_info". |
26 |
* @operation: The name of operation. |
* @operation: The name of operation. |
30 |
* |
* |
31 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
32 |
*/ |
*/ |
33 |
static int audit_network_log(struct ccs_request_info *r, 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 |
{ |
{ |
37 |
return ccs_write_audit_log(is_granted, r, KEYWORD_ALLOW_NETWORK |
if (!is_granted) |
38 |
|
ccs_warn_log(r, "%s %s %u", operation, address, port); |
39 |
|
return ccs_write_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
40 |
"%s %s %u\n", operation, address, port); |
"%s %s %u\n", operation, address, port); |
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. |
|
|
* |
|
|
* @group_name: The name of address group. |
|
|
* @is_ipv6: True if @min_address and @max_address are IPv6 addresses. |
|
|
* @min_address: Start of IPv4 or IPv6 address range. |
|
|
* @max_address: End of IPv4 or IPv6 address range. |
|
|
* @is_delete: True if it is a delete request. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int update_address_group_entry(const char *group_name, |
|
|
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; |
|
|
} |
|
|
|
|
|
/** |
|
|
* parse_ip_address - Parse an IP address. |
|
45 |
* |
* |
46 |
* @address: String to parse. |
* @address: String to parse. |
47 |
* @min: Pointer to store min address. |
* @min: Pointer to store min address. |
48 |
* @max: Pointer to store max address. |
* @max: Pointer to store max address. |
49 |
* |
* |
50 |
* Returns 2 if @address is an IPv6, 1 if @address is an IPv4, 0 otherwise. |
* Returns CCS_IP_ADDRESS_TYPE_IPv6 if @address is an IPv6, |
51 |
|
* CCS_IP_ADDRESS_TYPE_IPv4 if @address is an IPv4, |
52 |
|
* CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP otherwise. |
53 |
*/ |
*/ |
54 |
static int parse_ip_address(char *address, u16 *min, u16 *max) |
int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
55 |
{ |
{ |
56 |
int count = sscanf(address, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
int count = sscanf(address, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" |
57 |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
"-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", |
67 |
min[i] = htons(min[i]); |
min[i] = htons(min[i]); |
68 |
max[i] = htons(max[i]); |
max[i] = htons(max[i]); |
69 |
} |
} |
70 |
return 2; |
return CCS_IP_ADDRESS_TYPE_IPv6; |
71 |
} |
} |
72 |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
73 |
&min[0], &min[1], &min[2], &min[3], |
&min[0], &min[1], &min[2], &min[3], |
77 |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
78 |
memmove(min, &ip, sizeof(ip)); |
memmove(min, &ip, sizeof(ip)); |
79 |
if (count == 8) |
if (count == 8) |
80 |
ip = htonl((((u8) max[0]) << 24) + (((u8) max[1]) << 16) |
ip = htonl((((u8) max[0]) << 24) |
81 |
|
+ (((u8) max[1]) << 16) |
82 |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
83 |
memmove(max, &ip, sizeof(ip)); |
memmove(max, &ip, sizeof(ip)); |
84 |
return 1; |
return CCS_IP_ADDRESS_TYPE_IPv4; |
|
} |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* 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) |
|
|
{ |
|
|
bool is_ipv6; |
|
|
u16 min_address[8]; |
|
|
u16 max_address[8]; |
|
|
char *cp = strchr(data, ' '); |
|
|
if (!cp) |
|
|
return -EINVAL; |
|
|
*cp++ = '\0'; |
|
|
switch (parse_ip_address(cp, min_address, max_address)) { |
|
|
case 2: |
|
|
is_ipv6 = true; |
|
|
break; |
|
|
case 1: |
|
|
is_ipv6 = false; |
|
|
break; |
|
|
default: |
|
|
return -EINVAL; |
|
|
} |
|
|
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); |
|
|
} |
|
|
} |
|
|
return NULL; |
|
|
} |
|
|
|
|
|
/** |
|
|
* 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; |
|
|
} |
|
85 |
} |
} |
86 |
return false; |
return CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
87 |
} |
} |
88 |
|
|
89 |
/** |
/** |
90 |
* ccs_read_address_group_policy - Read "struct address_group_entry" list. |
* ccs_print_ipv4 - Print an IPv4 address. |
91 |
* |
* |
92 |
* @head: Pointer to "struct ccs_io_buffer". |
* @buffer: Buffer to write to. |
93 |
|
* @buffer_len: Size of @buffer. |
94 |
|
* @min_ip: Min address in host byte order. |
95 |
|
* @max_ip: Max address in host byte order. |
96 |
* |
* |
97 |
* Returns true on success, false otherwise. |
* Returns nothing. |
98 |
*/ |
*/ |
99 |
bool ccs_read_address_group_policy(struct ccs_io_buffer *head) |
void ccs_print_ipv4(char *buffer, const int buffer_len, |
100 |
|
const u32 min_ip, const u32 max_ip) |
101 |
{ |
{ |
102 |
struct list1_head *gpos; |
memset(buffer, 0, buffer_len); |
103 |
struct list1_head *mpos; |
snprintf(buffer, buffer_len - 1, "%u.%u.%u.%u%c%u.%u.%u.%u", |
104 |
list1_for_each_cookie(gpos, head->read_var1, &address_group_list) { |
HIPQUAD(min_ip), min_ip == max_ip ? '\0' : '-', |
105 |
struct address_group_entry *group; |
HIPQUAD(max_ip)); |
|
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; |
|
106 |
} |
} |
107 |
|
|
108 |
#if !defined(NIP6) |
#if !defined(NIP6) |
109 |
#define NIP6(addr) \ |
#define NIP6(addr) \ |
110 |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
111 |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
ntohs((addr).s6_addr16[2]), ntohs((addr).s6_addr16[3]), \ |
112 |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
ntohs((addr).s6_addr16[4]), ntohs((addr).s6_addr16[5]), \ |
113 |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
ntohs((addr).s6_addr16[6]), ntohs((addr).s6_addr16[7]) |
114 |
#endif |
#endif |
115 |
|
|
116 |
/** |
/** |
118 |
* |
* |
119 |
* @buffer: Buffer to write to. |
* @buffer: Buffer to write to. |
120 |
* @buffer_len: Size of @buffer. |
* @buffer_len: Size of @buffer. |
121 |
* @ip: Pointer to "struct in6_addr". |
* @min_ip: Pointer to "struct in6_addr". |
122 |
|
* @max_ip: Pointer to "struct in6_addr". |
123 |
* |
* |
124 |
* Returns nothing. |
* Returns nothing. |
125 |
*/ |
*/ |
126 |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
127 |
const struct in6_addr *ip) |
const struct in6_addr *min_ip, |
128 |
|
const struct in6_addr *max_ip) |
129 |
{ |
{ |
130 |
memset(buffer, 0, buffer_len); |
memset(buffer, 0, buffer_len); |
131 |
snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", NIP6(*ip)); |
snprintf(buffer, buffer_len - 1, |
132 |
|
"%x:%x:%x:%x:%x:%x:%x:%x%c%x:%x:%x:%x:%x:%x:%x:%x", |
133 |
|
NIP6(*min_ip), min_ip == max_ip ? '\0' : '-', |
134 |
|
NIP6(*max_ip)); |
135 |
} |
} |
136 |
|
|
137 |
/** |
/** |
145 |
{ |
{ |
146 |
const char *keyword = "unknown"; |
const char *keyword = "unknown"; |
147 |
switch (operation) { |
switch (operation) { |
148 |
case NETWORK_ACL_UDP_BIND: |
case CCS_NETWORK_UDP_BIND: |
149 |
keyword = "UDP bind"; |
keyword = "UDP bind"; |
150 |
break; |
break; |
151 |
case NETWORK_ACL_UDP_CONNECT: |
case CCS_NETWORK_UDP_CONNECT: |
152 |
keyword = "UDP connect"; |
keyword = "UDP connect"; |
153 |
break; |
break; |
154 |
case NETWORK_ACL_TCP_BIND: |
case CCS_NETWORK_TCP_BIND: |
155 |
keyword = "TCP bind"; |
keyword = "TCP bind"; |
156 |
break; |
break; |
157 |
case NETWORK_ACL_TCP_LISTEN: |
case CCS_NETWORK_TCP_LISTEN: |
158 |
keyword = "TCP listen"; |
keyword = "TCP listen"; |
159 |
break; |
break; |
160 |
case NETWORK_ACL_TCP_CONNECT: |
case CCS_NETWORK_TCP_CONNECT: |
161 |
keyword = "TCP connect"; |
keyword = "TCP connect"; |
162 |
break; |
break; |
163 |
case NETWORK_ACL_TCP_ACCEPT: |
case CCS_NETWORK_TCP_ACCEPT: |
164 |
keyword = "TCP accept"; |
keyword = "TCP accept"; |
165 |
break; |
break; |
166 |
case NETWORK_ACL_RAW_BIND: |
case CCS_NETWORK_RAW_BIND: |
167 |
keyword = "RAW bind"; |
keyword = "RAW bind"; |
168 |
break; |
break; |
169 |
case NETWORK_ACL_RAW_CONNECT: |
case CCS_NETWORK_RAW_CONNECT: |
170 |
keyword = "RAW connect"; |
keyword = "RAW connect"; |
171 |
break; |
break; |
172 |
} |
} |
174 |
} |
} |
175 |
|
|
176 |
/** |
/** |
177 |
* update_network_entry - Update "struct ip_network_acl_record" list. |
* ccs_network_entry2 - Check permission for network operation. |
178 |
* |
* |
179 |
* @operation: Type of operation. |
* @is_ipv6: True if @address is an IPv6 address. |
180 |
* @record_type: Type of address. |
* @operation: Type of operation. |
181 |
* @group: Pointer to "struct address_group_entry". May be NULL. |
* @address: An IPv4 or IPv6 address. |
182 |
* @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. |
|
183 |
* |
* |
184 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
185 |
|
* |
186 |
|
* Caller holds ccs_read_lock(). |
187 |
*/ |
*/ |
188 |
static int update_network_entry(const u8 operation, const u8 record_type, |
static int ccs_network_entry2(const bool is_ipv6, const u8 operation, |
189 |
const struct address_group_entry *group, |
const u32 *address, const u16 port) |
190 |
const u32 *min_address, const u32 *max_address, |
{ |
191 |
const u16 min_port, const u16 max_port, |
struct ccs_request_info r; |
192 |
struct domain_info *domain, |
struct ccs_acl_info *ptr; |
193 |
const struct condition_list *condition, |
const char *keyword = ccs_net2keyword(operation); |
194 |
const bool is_delete) |
const u16 perm = 1 << operation; |
|
{ |
|
|
static DEFINE_MUTEX(lock); |
|
|
struct acl_info *ptr; |
|
|
struct ip_network_acl_record *acl; |
|
|
int error = -ENOMEM; |
|
195 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
/* using host byte order to allow u32 comparison than memcmp().*/ |
196 |
const u32 min_ip = ntohl(*min_address); |
const u32 ip = ntohl(*address); |
197 |
const u32 max_ip = ntohl(*max_address); |
int error; |
198 |
const struct in6_addr *saved_min_address = NULL; |
char buf[128]; |
199 |
const struct in6_addr *saved_max_address = NULL; |
const struct ccs_domain_info * const domain = ccs_current_domain(); |
200 |
if (!domain) |
if (ccs_init_request_info(&r, CCS_MAC_NETWORK_UDP_BIND + operation) |
201 |
return -EINVAL; |
== CCS_CONFIG_DISABLED) |
202 |
if (record_type != IP_RECORD_TYPE_IPv6) |
return 0; |
203 |
goto not_ipv6; |
if (is_ipv6) |
204 |
saved_min_address = save_ipv6_address((struct in6_addr *) min_address); |
ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
205 |
saved_max_address = save_ipv6_address((struct in6_addr *) max_address); |
address, (const struct in6_addr *) address); |
206 |
if (!saved_min_address || !saved_max_address) |
else |
207 |
return -ENOMEM; |
ccs_print_ipv4(buf, sizeof(buf), ip, ip); |
208 |
not_ipv6: |
do { |
209 |
mutex_lock(&lock); |
error = -EPERM; |
210 |
if (is_delete) |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
211 |
goto delete; |
struct ccs_ip_network_acl *acl; |
212 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
if (ptr->is_deleted || |
213 |
if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) |
ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
214 |
continue; |
continue; |
215 |
if (ccs_get_condition_part(ptr) != condition) |
acl = container_of(ptr, struct ccs_ip_network_acl, |
216 |
continue; |
head); |
217 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
if (!(acl->perm & perm)) |
218 |
if (acl->operation_type != operation || |
continue; |
219 |
acl->record_type != record_type || |
if (!ccs_compare_number_union(port, &acl->port) || |
220 |
acl->min_port != min_port || max_port != acl->max_port) |
!ccs_condition(&r, ptr)) |
221 |
continue; |
continue; |
222 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
switch (acl->address_type) { |
223 |
if (acl->u.group != group) |
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
224 |
continue; |
if (!ccs_address_matches_group(is_ipv6, |
225 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
address, |
226 |
if (acl->u.ipv4.min != min_ip || |
acl->address. |
227 |
max_ip != acl->u.ipv4.max) |
group)) |
228 |
continue; |
continue; |
229 |
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
break; |
230 |
if (acl->u.ipv6.min != saved_min_address || |
case CCS_IP_ADDRESS_TYPE_IPv4: |
231 |
saved_max_address != acl->u.ipv6.max) |
if (is_ipv6 || ip < acl->address.ipv4.min || |
232 |
continue; |
acl->address.ipv4.max < ip) |
233 |
} |
continue; |
234 |
error = ccs_add_domain_acl(NULL, ptr); |
break; |
235 |
goto out; |
default: |
236 |
} |
if (!is_ipv6 || |
237 |
/* Not found. Append it to the tail. */ |
memcmp(acl->address.ipv6.min, address, 16) |
238 |
acl = ccs_alloc_acl_element(TYPE_IP_NETWORK_ACL, condition); |
> 0 || |
239 |
if (!acl) |
memcmp(address, acl->address.ipv6.max, 16) |
240 |
goto out; |
> 0) |
241 |
acl->operation_type = operation; |
continue; |
242 |
acl->record_type = record_type; |
break; |
243 |
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
} |
244 |
acl->u.group = group; |
r.cond = ptr->cond; |
245 |
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
error = 0; |
246 |
acl->u.ipv4.min = min_ip; |
break; |
|
acl->u.ipv4.max = max_ip; |
|
|
} else { |
|
|
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; |
|
247 |
} |
} |
248 |
error = ccs_del_domain_acl(ptr); |
ccs_audit_network_log(&r, keyword, buf, port, !error); |
249 |
break; |
if (!error) |
250 |
} |
break; |
251 |
out: |
error = ccs_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
252 |
mutex_unlock(&lock); |
"%s %s %u\n", keyword, buf, port); |
253 |
|
} while (error == CCS_RETRY_REQUEST); |
254 |
|
if (r.mode != CCS_CONFIG_ENFORCING) |
255 |
|
error = 0; |
256 |
return error; |
return error; |
257 |
} |
} |
258 |
|
|
259 |
/** |
/** |
260 |
* check_network_entry - Check permission for network operation. |
* ccs_network_entry - Check permission for network operation. |
261 |
* |
* |
262 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
263 |
* @operation: Type of operation. |
* @operation: Type of operation. |
266 |
* |
* |
267 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
268 |
*/ |
*/ |
269 |
static int check_network_entry(const bool is_ipv6, const u8 operation, |
static int ccs_network_entry(const bool is_ipv6, const u8 operation, |
270 |
const u32 *address, const u16 port) |
const u32 *address, const u16 port) |
271 |
{ |
{ |
272 |
struct ccs_request_info r; |
const int idx = ccs_read_lock(); |
273 |
struct acl_info *ptr; |
const int error = ccs_network_entry2(is_ipv6, operation, address, |
274 |
const char *keyword = ccs_net2keyword(operation); |
port); |
275 |
bool is_enforce; |
ccs_read_unlock(idx); |
276 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
return error; |
277 |
const u32 ip = ntohl(*address); |
} |
278 |
bool found = false; |
|
279 |
char buf[64]; |
static bool ccs_same_ip_network_acl(const struct ccs_acl_info *a, |
280 |
if (!ccs_can_sleep()) |
const struct ccs_acl_info *b) |
281 |
return 0; |
{ |
282 |
ccs_init_request_info(&r, NULL, CCS_TOMOYO_MAC_FOR_NETWORK); |
const struct ccs_ip_network_acl *p1 = container_of(a, typeof(*p1), |
283 |
is_enforce = (r.mode == 3); |
head); |
284 |
if (!r.mode) |
const struct ccs_ip_network_acl *p2 = container_of(b, typeof(*p2), |
285 |
return 0; |
head); |
286 |
retry: |
return ccs_same_acl_head(&p1->head, &p2->head) |
287 |
list1_for_each_entry(ptr, &r.domain->acl_info_list, list) { |
&& p1->address_type == p2->address_type && |
288 |
struct ip_network_acl_record *acl; |
p1->address.ipv4.min == p2->address.ipv4.min && |
289 |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
p1->address.ipv6.min == p2->address.ipv6.min && |
290 |
continue; |
p1->address.ipv4.max == p2->address.ipv4.max && |
291 |
acl = container_of(ptr, struct ip_network_acl_record, head); |
p1->address.ipv6.max == p2->address.ipv6.max && |
292 |
if (acl->operation_type != operation || port < acl->min_port || |
p1->address.group == p2->address.group && |
293 |
acl->max_port < port || !ccs_check_condition(&r, ptr)) |
ccs_same_number_union(&p1->port, &p2->port); |
294 |
continue; |
} |
295 |
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
|
296 |
if (!address_matches_to_group(is_ipv6, address, |
static bool ccs_merge_ip_network_acl(struct ccs_acl_info *a, |
297 |
acl->u.group)) |
struct ccs_acl_info *b, |
298 |
continue; |
const bool is_delete) |
299 |
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
{ |
300 |
if (is_ipv6 || |
struct ccs_ip_network_acl *p1 = container_of(a, typeof(*p1), head); |
301 |
ip < acl->u.ipv4.min || acl->u.ipv4.max < ip) |
const u16 perm = container_of(b, typeof(*p1), head)->perm; |
302 |
continue; |
if (is_delete) { |
303 |
} else { |
p1->perm &= ~perm; |
304 |
if (!is_ipv6 || |
} else { |
305 |
memcmp(acl->u.ipv6.min, address, 16) > 0 || |
if (p1->head.is_deleted) |
306 |
memcmp(address, acl->u.ipv6.max, 16) > 0) |
p1->perm = 0; |
307 |
continue; |
p1->perm |= perm; |
|
} |
|
|
r.cond = ccs_get_condition_part(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(&r, keyword, buf, port, found); |
|
|
if (found) |
|
|
return 0; |
|
|
if (ccs_verbose_mode(r.domain)) |
|
|
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(r.domain)); |
|
|
if (is_enforce) { |
|
|
int error = ccs_check_supervisor(&r, KEYWORD_ALLOW_NETWORK |
|
|
"%s %s %u\n", keyword, buf, |
|
|
port); |
|
|
if (error == 1) |
|
|
goto retry; |
|
|
return error; |
|
308 |
} |
} |
309 |
if (r.mode == 1 && ccs_check_domain_quota(r.domain)) |
return !p1->perm; |
|
update_network_entry(operation, is_ipv6 ? |
|
|
IP_RECORD_TYPE_IPv6 : IP_RECORD_TYPE_IPv4, |
|
|
NULL, address, address, port, port, |
|
|
r.domain, NULL, 0); |
|
|
return 0; |
|
310 |
} |
} |
311 |
|
|
312 |
/** |
/** |
313 |
* ccs_write_network_policy - Write "struct ip_network_acl_record" list. |
* ccs_write_network - Write "struct ccs_ip_network_acl" list. |
314 |
* |
* |
315 |
* @data: String to parse. |
* @data: String to parse. |
316 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
317 |
* @condition: Pointer to "struct condition_list". May be NULL. |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
318 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
319 |
* |
* |
320 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
321 |
*/ |
*/ |
322 |
int ccs_write_network_policy(char *data, struct domain_info *domain, |
int ccs_write_network(char *data, struct ccs_domain_info *domain, |
323 |
const struct condition_list *condition, |
struct ccs_condition *condition, const bool is_delete) |
|
const bool is_delete) |
|
324 |
{ |
{ |
325 |
u8 sock_type; |
struct ccs_ip_network_acl e = { |
326 |
u8 operation; |
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
327 |
u8 record_type; |
.head.cond = condition, |
328 |
|
}; |
329 |
u16 min_address[8]; |
u16 min_address[8]; |
330 |
u16 max_address[8]; |
u16 max_address[8]; |
331 |
struct address_group_entry *group = NULL; |
int error = is_delete ? -ENOENT : -ENOMEM; |
332 |
u16 min_port; |
u8 sock_type; |
333 |
u16 max_port; |
char *w[4]; |
334 |
u8 count; |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
335 |
char *cp1 = strchr(data, ' '); |
return -EINVAL; |
336 |
char *cp2; |
if (!strcmp(w[0], "TCP")) |
|
if (!cp1) |
|
|
goto out; |
|
|
cp1++; |
|
|
if (!strncmp(data, "TCP ", 4)) |
|
337 |
sock_type = SOCK_STREAM; |
sock_type = SOCK_STREAM; |
338 |
else if (!strncmp(data, "UDP ", 4)) |
else if (!strcmp(w[0], "UDP")) |
339 |
sock_type = SOCK_DGRAM; |
sock_type = SOCK_DGRAM; |
340 |
else if (!strncmp(data, "RAW ", 4)) |
else if (!strcmp(w[0], "RAW")) |
341 |
sock_type = SOCK_RAW; |
sock_type = SOCK_RAW; |
342 |
else |
else |
343 |
goto out; |
return -EINVAL; |
344 |
cp2 = strchr(cp1, ' '); |
if (!strcmp(w[1], "bind")) |
|
if (!cp2) |
|
|
goto out; |
|
|
cp2++; |
|
|
if (!strncmp(cp1, "bind ", 5)) |
|
345 |
switch (sock_type) { |
switch (sock_type) { |
346 |
case SOCK_STREAM: |
case SOCK_STREAM: |
347 |
operation = NETWORK_ACL_TCP_BIND; |
e.perm = 1 << CCS_NETWORK_TCP_BIND; |
348 |
break; |
break; |
349 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
350 |
operation = NETWORK_ACL_UDP_BIND; |
e.perm = 1 << CCS_NETWORK_UDP_BIND; |
351 |
break; |
break; |
352 |
default: |
default: |
353 |
operation = NETWORK_ACL_RAW_BIND; |
e.perm = 1 << CCS_NETWORK_RAW_BIND; |
354 |
|
break; |
355 |
} |
} |
356 |
else if (!strncmp(cp1, "connect ", 8)) |
else if (!strcmp(w[1], "connect")) |
357 |
switch (sock_type) { |
switch (sock_type) { |
358 |
case SOCK_STREAM: |
case SOCK_STREAM: |
359 |
operation = NETWORK_ACL_TCP_CONNECT; |
e.perm = 1 << CCS_NETWORK_TCP_CONNECT; |
360 |
break; |
break; |
361 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
362 |
operation = NETWORK_ACL_UDP_CONNECT; |
e.perm = 1 << CCS_NETWORK_UDP_CONNECT; |
363 |
break; |
break; |
364 |
default: |
default: |
365 |
operation = NETWORK_ACL_RAW_CONNECT; |
e.perm = 1 << CCS_NETWORK_RAW_CONNECT; |
366 |
|
break; |
367 |
} |
} |
368 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "listen ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "listen")) |
369 |
operation = NETWORK_ACL_TCP_LISTEN; |
e.perm = 1 << CCS_NETWORK_TCP_LISTEN; |
370 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "accept ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "accept")) |
371 |
operation = NETWORK_ACL_TCP_ACCEPT; |
e.perm = 1 << CCS_NETWORK_TCP_ACCEPT; |
372 |
else |
else |
373 |
goto out; |
return -EINVAL; |
374 |
cp1 = strchr(cp2, ' '); |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
375 |
if (!cp1) |
case CCS_IP_ADDRESS_TYPE_IPv6: |
376 |
goto out; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
377 |
*cp1++ = '\0'; |
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
378 |
switch (parse_ip_address(cp2, min_address, max_address)) { |
min_address); |
379 |
case 2: |
e.address.ipv6.max = ccs_get_ipv6_address((struct in6_addr *) |
380 |
record_type = IP_RECORD_TYPE_IPv6; |
max_address); |
381 |
|
if (!e.address.ipv6.min || !e.address.ipv6.max) |
382 |
|
goto out; |
383 |
break; |
break; |
384 |
case 1: |
case CCS_IP_ADDRESS_TYPE_IPv4: |
385 |
record_type = IP_RECORD_TYPE_IPv4; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
386 |
|
/* use host byte order to allow u32 comparison.*/ |
387 |
|
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
388 |
|
e.address.ipv4.max = ntohl(*(u32 *) max_address); |
389 |
break; |
break; |
390 |
default: |
default: |
391 |
if (*cp2 != '@') |
if (w[2][0] != '@') |
392 |
goto out; |
return -EINVAL; |
393 |
group = find_or_assign_new_address_group(cp2 + 1); |
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
394 |
if (!group) |
e.address.group = ccs_get_group(w[2] + 1, CCS_ADDRESS_GROUP); |
395 |
|
if (!e.address.group) |
396 |
return -ENOMEM; |
return -ENOMEM; |
|
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
|
397 |
break; |
break; |
398 |
} |
} |
399 |
if (strchr(cp1, ' ')) |
if (!ccs_parse_number_union(w[3], &e.port)) |
400 |
goto out; |
goto out; |
401 |
count = sscanf(cp1, "%hu-%hu", &min_port, &max_port); |
error = ccs_update_domain(&e.head, sizeof(e), is_delete, domain, |
402 |
if (count != 1 && count != 2) |
ccs_same_ip_network_acl, |
403 |
goto out; |
ccs_merge_ip_network_acl); |
|
if (count == 1) |
|
|
max_port = min_port; |
|
|
return update_network_entry(operation, record_type, group, |
|
|
(u32 *) min_address, (u32 *) max_address, |
|
|
min_port, max_port, domain, condition, |
|
|
is_delete); |
|
404 |
out: |
out: |
405 |
return -EINVAL; |
if (w[2][0] == '@') |
406 |
|
ccs_put_group(e.address.group); |
407 |
|
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
408 |
|
ccs_put_ipv6_address(e.address.ipv6.min); |
409 |
|
ccs_put_ipv6_address(e.address.ipv6.max); |
410 |
|
} |
411 |
|
ccs_put_number_union(&e.port); |
412 |
|
return error; |
413 |
} |
} |
414 |
|
|
415 |
/** |
/** |
416 |
* ccs_check_network_listen_acl - Check permission for listen() operation. |
* ccs_network_listen_acl - Check permission for listen() operation. |
417 |
* |
* |
418 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
419 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
421 |
* |
* |
422 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
423 |
*/ |
*/ |
424 |
int ccs_check_network_listen_acl(const _Bool is_ipv6, const u8 *address, |
static int ccs_network_listen_acl(const bool is_ipv6, const u8 *address, |
425 |
const u16 port) |
const u16 port) |
426 |
{ |
{ |
427 |
return check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, |
return ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
428 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
429 |
} |
} |
430 |
|
|
431 |
/** |
/** |
432 |
* ccs_check_network_connect_acl - Check permission for connect() operation. |
* ccs_network_connect_acl - Check permission for connect() operation. |
433 |
* |
* |
434 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
435 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
438 |
* |
* |
439 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
440 |
*/ |
*/ |
441 |
int ccs_check_network_connect_acl(const _Bool is_ipv6, const int sock_type, |
static int ccs_network_connect_acl(const bool is_ipv6, const int sock_type, |
442 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
443 |
{ |
{ |
444 |
u8 operation; |
u8 operation; |
445 |
switch (sock_type) { |
switch (sock_type) { |
446 |
case SOCK_STREAM: |
case SOCK_STREAM: |
447 |
operation = NETWORK_ACL_TCP_CONNECT; |
operation = CCS_NETWORK_TCP_CONNECT; |
448 |
break; |
break; |
449 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
450 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
451 |
break; |
break; |
452 |
default: |
default: |
453 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
454 |
} |
} |
455 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_network_entry(is_ipv6, operation, |
456 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
457 |
} |
} |
458 |
|
|
459 |
/** |
/** |
460 |
* ccs_check_network_bind_acl - Check permission for bind() operation. |
* ccs_network_bind_acl - Check permission for bind() operation. |
461 |
* |
* |
462 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
463 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
466 |
* |
* |
467 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
468 |
*/ |
*/ |
469 |
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, |
470 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
471 |
{ |
{ |
472 |
u8 operation; |
u8 operation; |
473 |
switch (sock_type) { |
switch (sock_type) { |
474 |
case SOCK_STREAM: |
case SOCK_STREAM: |
475 |
operation = NETWORK_ACL_TCP_BIND; |
operation = CCS_NETWORK_TCP_BIND; |
476 |
break; |
break; |
477 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
478 |
operation = NETWORK_ACL_UDP_BIND; |
operation = CCS_NETWORK_UDP_BIND; |
479 |
break; |
break; |
480 |
default: |
default: |
481 |
operation = NETWORK_ACL_RAW_BIND; |
operation = CCS_NETWORK_RAW_BIND; |
482 |
} |
} |
483 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_network_entry(is_ipv6, operation, |
484 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
485 |
} |
} |
486 |
|
|
487 |
/** |
/** |
488 |
* ccs_check_network_accept_acl - Check permission for accept() operation. |
* ccs_network_accept_acl - Check permission for accept() operation. |
489 |
* |
* |
490 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
491 |
* @address: An IPv4 or IPv6 address. |
* @address: An IPv4 or IPv6 address. |
493 |
* |
* |
494 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
495 |
*/ |
*/ |
496 |
int ccs_check_network_accept_acl(const _Bool is_ipv6, const u8 *address, |
static int ccs_network_accept_acl(const bool is_ipv6, const u8 *address, |
497 |
const u16 port) |
const u16 port) |
498 |
{ |
{ |
499 |
int retval; |
int retval; |
500 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
501 |
retval = check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, |
retval = ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_ACCEPT, |
502 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
503 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
504 |
return retval; |
return retval; |
505 |
} |
} |
506 |
|
|
507 |
/** |
/** |
508 |
* ccs_check_network_sendmsg_acl - Check permission for sendmsg() operation. |
* ccs_network_sendmsg_acl - Check permission for sendmsg() operation. |
509 |
* |
* |
510 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
511 |
* @sock_type: Type of socket. (UDP or RAW) |
* @sock_type: Type of socket. (UDP or RAW) |
514 |
* |
* |
515 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
516 |
*/ |
*/ |
517 |
int ccs_check_network_sendmsg_acl(const _Bool is_ipv6, const int sock_type, |
static int ccs_network_sendmsg_acl(const bool is_ipv6, const int sock_type, |
518 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
519 |
{ |
{ |
520 |
u8 operation; |
u8 operation; |
521 |
if (sock_type == SOCK_DGRAM) |
if (sock_type == SOCK_DGRAM) |
522 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
523 |
else |
else |
524 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
525 |
return check_network_entry(is_ipv6, operation, (const u32 *) address, |
return ccs_network_entry(is_ipv6, operation, |
526 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
527 |
} |
} |
528 |
|
|
529 |
/** |
/** |
530 |
* ccs_check_network_recvmsg_acl - Check permission for recvmsg() operation. |
* ccs_network_recvmsg_acl - Check permission for recvmsg() operation. |
531 |
* |
* |
532 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
533 |
* @sock_type: Type of socket. (UDP or RAW) |
* @sock_type: Type of socket. (UDP or RAW) |
536 |
* |
* |
537 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
538 |
*/ |
*/ |
539 |
int ccs_check_network_recvmsg_acl(const _Bool is_ipv6, const int sock_type, |
static int ccs_network_recvmsg_acl(const bool is_ipv6, const int sock_type, |
540 |
const u8 *address, const u16 port) |
const u8 *address, const u16 port) |
541 |
{ |
{ |
542 |
int retval; |
int retval; |
543 |
const u8 operation |
const u8 operation |
544 |
= (sock_type == SOCK_DGRAM) ? |
= (sock_type == SOCK_DGRAM) ? |
545 |
NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
CCS_NETWORK_UDP_CONNECT : CCS_NETWORK_RAW_CONNECT; |
546 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
547 |
retval = check_network_entry(is_ipv6, operation, (const u32 *) address, |
retval = ccs_network_entry(is_ipv6, operation, |
548 |
ntohs(port)); |
(const u32 *) address, ntohs(port)); |
549 |
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
550 |
return retval; |
return retval; |
551 |
} |
} |
552 |
|
|
553 |
|
#ifndef CONFIG_NET |
554 |
|
|
555 |
|
void __init ccs_network_init(void) |
556 |
|
{ |
557 |
|
} |
558 |
|
|
559 |
|
#else |
560 |
|
|
561 |
|
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
562 |
|
|
563 |
|
/* Check permission for creating a socket. */ |
564 |
|
static int __ccs_socket_create_permission(int family, int type, int protocol) |
565 |
|
{ |
566 |
|
int error = 0; |
567 |
|
/* Nothing to do if I am a kernel service. */ |
568 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
569 |
|
return 0; |
570 |
|
if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET)) |
571 |
|
return -EPERM; |
572 |
|
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
573 |
|
return -EPERM; |
574 |
|
if (family != PF_INET && family != PF_INET6) |
575 |
|
return 0; |
576 |
|
switch (type) { |
577 |
|
case SOCK_STREAM: |
578 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CREATE)) |
579 |
|
error = -EPERM; |
580 |
|
break; |
581 |
|
case SOCK_DGRAM: |
582 |
|
if (!ccs_capable(CCS_USE_INET_DGRAM_SOCKET)) |
583 |
|
error = -EPERM; |
584 |
|
break; |
585 |
|
case SOCK_RAW: |
586 |
|
if (!ccs_capable(CCS_USE_INET_RAW_SOCKET)) |
587 |
|
error = -EPERM; |
588 |
|
break; |
589 |
|
} |
590 |
|
return error; |
591 |
|
} |
592 |
|
|
593 |
|
/* Check permission for listening a TCP socket. */ |
594 |
|
static int __ccs_socket_listen_permission(struct socket *sock) |
595 |
|
{ |
596 |
|
int error = 0; |
597 |
|
char addr[MAX_SOCK_ADDR]; |
598 |
|
int addr_len; |
599 |
|
/* Nothing to do if I am a kernel service. */ |
600 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
601 |
|
return 0; |
602 |
|
if (sock->type != SOCK_STREAM) |
603 |
|
return 0; |
604 |
|
switch (sock->sk->sk_family) { |
605 |
|
case PF_INET: |
606 |
|
case PF_INET6: |
607 |
|
break; |
608 |
|
default: |
609 |
|
return 0; |
610 |
|
} |
611 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_LISTEN)) |
612 |
|
return -EPERM; |
613 |
|
if (sock->ops->getname(sock, (struct sockaddr *) addr, &addr_len, 0)) |
614 |
|
return -EPERM; |
615 |
|
switch (((struct sockaddr *) addr)->sa_family) { |
616 |
|
struct sockaddr_in6 *addr6; |
617 |
|
struct sockaddr_in *addr4; |
618 |
|
case AF_INET6: |
619 |
|
addr6 = (struct sockaddr_in6 *) addr; |
620 |
|
error = ccs_network_listen_acl(true, |
621 |
|
addr6->sin6_addr.s6_addr, |
622 |
|
addr6->sin6_port); |
623 |
|
break; |
624 |
|
case AF_INET: |
625 |
|
addr4 = (struct sockaddr_in *) addr; |
626 |
|
error = ccs_network_listen_acl(false, |
627 |
|
(u8 *) &addr4->sin_addr, |
628 |
|
addr4->sin_port); |
629 |
|
break; |
630 |
|
} |
631 |
|
return error; |
632 |
|
} |
633 |
|
|
634 |
|
/* Check permission for setting the remote IP address/port pair of a socket. */ |
635 |
|
static int __ccs_socket_connect_permission(struct socket *sock, |
636 |
|
struct sockaddr *addr, int addr_len) |
637 |
|
{ |
638 |
|
int error = 0; |
639 |
|
const unsigned int type = sock->type; |
640 |
|
/* Nothing to do if I am a kernel service. */ |
641 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
642 |
|
return 0; |
643 |
|
switch (type) { |
644 |
|
case SOCK_STREAM: |
645 |
|
case SOCK_DGRAM: |
646 |
|
case SOCK_RAW: |
647 |
|
break; |
648 |
|
default: |
649 |
|
return 0; |
650 |
|
} |
651 |
|
switch (addr->sa_family) { |
652 |
|
struct sockaddr_in6 *addr6; |
653 |
|
struct sockaddr_in *addr4; |
654 |
|
u16 port; |
655 |
|
case AF_INET6: |
656 |
|
if (addr_len < SIN6_LEN_RFC2133) |
657 |
|
break; |
658 |
|
addr6 = (struct sockaddr_in6 *) addr; |
659 |
|
if (type != SOCK_RAW) |
660 |
|
port = addr6->sin6_port; |
661 |
|
else |
662 |
|
port = htons(sock->sk->sk_protocol); |
663 |
|
error = ccs_network_connect_acl(true, type, |
664 |
|
addr6->sin6_addr.s6_addr, |
665 |
|
port); |
666 |
|
break; |
667 |
|
case AF_INET: |
668 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
669 |
|
break; |
670 |
|
addr4 = (struct sockaddr_in *) addr; |
671 |
|
if (type != SOCK_RAW) |
672 |
|
port = addr4->sin_port; |
673 |
|
else |
674 |
|
port = htons(sock->sk->sk_protocol); |
675 |
|
error = ccs_network_connect_acl(false, type, |
676 |
|
(u8 *) &addr4->sin_addr, |
677 |
|
port); |
678 |
|
break; |
679 |
|
} |
680 |
|
if (type != SOCK_STREAM) |
681 |
|
return error; |
682 |
|
switch (sock->sk->sk_family) { |
683 |
|
case PF_INET: |
684 |
|
case PF_INET6: |
685 |
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CONNECT)) |
686 |
|
error = -EPERM; |
687 |
|
break; |
688 |
|
} |
689 |
|
return error; |
690 |
|
} |
691 |
|
|
692 |
|
/* Check permission for setting the local IP address/port pair of a socket. */ |
693 |
|
static int __ccs_socket_bind_permission(struct socket *sock, |
694 |
|
struct sockaddr *addr, int addr_len) |
695 |
|
{ |
696 |
|
int error = 0; |
697 |
|
const unsigned int type = sock->type; |
698 |
|
/* Nothing to do if I am a kernel service. */ |
699 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
700 |
|
return 0; |
701 |
|
switch (type) { |
702 |
|
case SOCK_STREAM: |
703 |
|
case SOCK_DGRAM: |
704 |
|
case SOCK_RAW: |
705 |
|
break; |
706 |
|
default: |
707 |
|
return 0; |
708 |
|
} |
709 |
|
switch (addr->sa_family) { |
710 |
|
struct sockaddr_in6 *addr6; |
711 |
|
struct sockaddr_in *addr4; |
712 |
|
u16 port; |
713 |
|
case AF_INET6: |
714 |
|
if (addr_len < SIN6_LEN_RFC2133) |
715 |
|
break; |
716 |
|
addr6 = (struct sockaddr_in6 *) addr; |
717 |
|
if (type != SOCK_RAW) |
718 |
|
port = addr6->sin6_port; |
719 |
|
else |
720 |
|
port = htons(sock->sk->sk_protocol); |
721 |
|
error = ccs_network_bind_acl(true, type, |
722 |
|
addr6->sin6_addr.s6_addr, |
723 |
|
port); |
724 |
|
break; |
725 |
|
case AF_INET: |
726 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
727 |
|
break; |
728 |
|
addr4 = (struct sockaddr_in *) addr; |
729 |
|
if (type != SOCK_RAW) |
730 |
|
port = addr4->sin_port; |
731 |
|
else |
732 |
|
port = htons(sock->sk->sk_protocol); |
733 |
|
error = ccs_network_bind_acl(false, type, |
734 |
|
(u8 *) &addr4->sin_addr, |
735 |
|
port); |
736 |
|
break; |
737 |
|
} |
738 |
|
return error; |
739 |
|
} |
740 |
|
|
741 |
|
/* |
742 |
|
* Check permission for accepting a TCP socket. |
743 |
|
* |
744 |
|
* Currently, the LSM hook for this purpose is not provided. |
745 |
|
*/ |
746 |
|
static int __ccs_socket_accept_permission(struct socket *sock, |
747 |
|
struct sockaddr *addr) |
748 |
|
{ |
749 |
|
int error = 0; |
750 |
|
int addr_len; |
751 |
|
/* Nothing to do if I am a kernel service. */ |
752 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
753 |
|
return 0; |
754 |
|
switch (sock->sk->sk_family) { |
755 |
|
case PF_INET: |
756 |
|
case PF_INET6: |
757 |
|
break; |
758 |
|
default: |
759 |
|
return 0; |
760 |
|
} |
761 |
|
error = sock->ops->getname(sock, addr, &addr_len, 2); |
762 |
|
if (error) |
763 |
|
return error; |
764 |
|
switch (addr->sa_family) { |
765 |
|
struct sockaddr_in6 *addr6; |
766 |
|
struct sockaddr_in *addr4; |
767 |
|
case AF_INET6: |
768 |
|
addr6 = (struct sockaddr_in6 *) addr; |
769 |
|
error = ccs_network_accept_acl(true, |
770 |
|
addr6->sin6_addr.s6_addr, |
771 |
|
addr6->sin6_port); |
772 |
|
break; |
773 |
|
case AF_INET: |
774 |
|
addr4 = (struct sockaddr_in *) addr; |
775 |
|
error = ccs_network_accept_acl(false, |
776 |
|
(u8 *) &addr4->sin_addr, |
777 |
|
addr4->sin_port); |
778 |
|
break; |
779 |
|
} |
780 |
|
return error; |
781 |
|
} |
782 |
|
|
783 |
|
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
784 |
|
static int __ccs_socket_sendmsg_permission(struct socket *sock, |
785 |
|
struct msghdr *msg, int size) |
786 |
|
{ |
787 |
|
struct sockaddr *addr = (struct sockaddr *) msg->msg_name; |
788 |
|
const int addr_len = msg->msg_namelen; |
789 |
|
int error = 0; |
790 |
|
const int type = sock->type; |
791 |
|
/* Nothing to do if I am a kernel service. */ |
792 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
793 |
|
return 0; |
794 |
|
if (!addr || (type != SOCK_DGRAM && type != SOCK_RAW)) |
795 |
|
return 0; |
796 |
|
switch (addr->sa_family) { |
797 |
|
struct sockaddr_in6 *addr6; |
798 |
|
struct sockaddr_in *addr4; |
799 |
|
u16 port; |
800 |
|
case AF_INET6: |
801 |
|
if (addr_len < SIN6_LEN_RFC2133) |
802 |
|
break; |
803 |
|
addr6 = (struct sockaddr_in6 *) addr; |
804 |
|
if (type == SOCK_DGRAM) |
805 |
|
port = addr6->sin6_port; |
806 |
|
else |
807 |
|
port = htons(sock->sk->sk_protocol); |
808 |
|
error = ccs_network_sendmsg_acl(true, type, |
809 |
|
addr6->sin6_addr.s6_addr, |
810 |
|
port); |
811 |
|
break; |
812 |
|
case AF_INET: |
813 |
|
if (addr_len < sizeof(struct sockaddr_in)) |
814 |
|
break; |
815 |
|
addr4 = (struct sockaddr_in *) addr; |
816 |
|
if (type == SOCK_DGRAM) |
817 |
|
port = addr4->sin_port; |
818 |
|
else |
819 |
|
port = htons(sock->sk->sk_protocol); |
820 |
|
error = ccs_network_sendmsg_acl(false, type, |
821 |
|
(u8 *) &addr4->sin_addr, port); |
822 |
|
break; |
823 |
|
} |
824 |
|
return error; |
825 |
|
} |
826 |
|
|
827 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
828 |
|
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
829 |
|
#if !defined(AX_MAJOR) || AX_MAJOR != 3 || !defined(AX_MINOR) || AX_MINOR < 2 |
830 |
|
|
831 |
|
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
832 |
|
{ |
833 |
|
return skb->nh.iph; |
834 |
|
} |
835 |
|
|
836 |
|
static inline struct udphdr *udp_hdr(const struct sk_buff *skb) |
837 |
|
{ |
838 |
|
return skb->h.uh; |
839 |
|
} |
840 |
|
|
841 |
|
static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb) |
842 |
|
{ |
843 |
|
return skb->nh.ipv6h; |
844 |
|
} |
845 |
|
|
846 |
|
#endif |
847 |
|
#endif |
848 |
|
#endif |
849 |
|
|
850 |
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) |
851 |
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
852 |
|
unsigned int flags) |
853 |
|
{ |
854 |
|
/* Clear queue. */ |
855 |
|
if (flags & MSG_PEEK) { |
856 |
|
int clear = 0; |
857 |
|
spin_lock_irq(&sk->sk_receive_queue.lock); |
858 |
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
859 |
|
__skb_unlink(skb, &sk->sk_receive_queue); |
860 |
|
clear = 1; |
861 |
|
} |
862 |
|
spin_unlock_irq(&sk->sk_receive_queue.lock); |
863 |
|
if (clear) |
864 |
|
kfree_skb(skb); |
865 |
|
} |
866 |
|
skb_free_datagram(sk, skb); |
867 |
|
} |
868 |
|
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16) |
869 |
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
870 |
|
unsigned int flags) |
871 |
|
{ |
872 |
|
/* Clear queue. */ |
873 |
|
if (flags & MSG_PEEK) { |
874 |
|
int clear = 0; |
875 |
|
spin_lock_bh(&sk->sk_receive_queue.lock); |
876 |
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
877 |
|
__skb_unlink(skb, &sk->sk_receive_queue); |
878 |
|
clear = 1; |
879 |
|
} |
880 |
|
spin_unlock_bh(&sk->sk_receive_queue.lock); |
881 |
|
if (clear) |
882 |
|
kfree_skb(skb); |
883 |
|
} |
884 |
|
skb_free_datagram(sk, skb); |
885 |
|
} |
886 |
|
#endif |
887 |
|
|
888 |
|
/* |
889 |
|
* Check permission for receiving a datagram via a UDP or RAW socket. |
890 |
|
* |
891 |
|
* Currently, the LSM hook for this purpose is not provided. |
892 |
|
*/ |
893 |
|
static int __ccs_socket_recvmsg_permission(struct sock *sk, |
894 |
|
struct sk_buff *skb, |
895 |
|
const unsigned int flags) |
896 |
|
{ |
897 |
|
int error = 0; |
898 |
|
const unsigned int type = sk->sk_type; |
899 |
|
if (type != SOCK_DGRAM && type != SOCK_RAW) |
900 |
|
return 0; |
901 |
|
/* Nothing to do if I am a kernel service. */ |
902 |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
903 |
|
return 0; |
904 |
|
|
905 |
|
switch (sk->sk_family) { |
906 |
|
struct in6_addr sin6; |
907 |
|
struct in_addr sin4; |
908 |
|
u16 port; |
909 |
|
case PF_INET6: |
910 |
|
if (type == SOCK_DGRAM) { /* UDP IPv6 */ |
911 |
|
if (skb->protocol == htons(ETH_P_IP)) { |
912 |
|
ipv6_addr_set(&sin6, 0, 0, htonl(0xffff), |
913 |
|
ip_hdr(skb)->saddr); |
914 |
|
} else { |
915 |
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
916 |
|
} |
917 |
|
port = udp_hdr(skb)->source; |
918 |
|
} else { /* RAW IPv6 */ |
919 |
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
920 |
|
port = htons(sk->sk_protocol); |
921 |
|
} |
922 |
|
error = ccs_network_recvmsg_acl(true, type, |
923 |
|
(u8 *) &sin6, port); |
924 |
|
break; |
925 |
|
case PF_INET: |
926 |
|
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
927 |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
928 |
|
port = udp_hdr(skb)->source; |
929 |
|
} else { /* RAW IPv4 */ |
930 |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
931 |
|
port = htons(sk->sk_protocol); |
932 |
|
} |
933 |
|
error = ccs_network_recvmsg_acl(false, type, |
934 |
|
(u8 *) &sin4, port); |
935 |
|
break; |
936 |
|
} |
937 |
|
if (!error) |
938 |
|
return 0; |
939 |
|
/* |
940 |
|
* Remove from queue if MSG_PEEK is used so that |
941 |
|
* the head message from unwanted source in receive queue will not |
942 |
|
* prevent the caller from picking up next message from wanted source |
943 |
|
* when the caller is using MSG_PEEK flag for picking up. |
944 |
|
*/ |
945 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
946 |
|
if (type == SOCK_DGRAM) |
947 |
|
lock_sock(sk); |
948 |
|
#endif |
949 |
|
skb_kill_datagram(sk, skb, flags); |
950 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
951 |
|
if (type == SOCK_DGRAM) |
952 |
|
release_sock(sk); |
953 |
|
#endif |
954 |
|
/* Hope less harmful than -EPERM. */ |
955 |
|
return -ENOMEM; |
956 |
|
} |
957 |
|
|
958 |
|
void __init ccs_network_init(void) |
959 |
|
{ |
960 |
|
ccsecurity_ops.socket_create_permission = |
961 |
|
__ccs_socket_create_permission; |
962 |
|
ccsecurity_ops.socket_listen_permission = |
963 |
|
__ccs_socket_listen_permission; |
964 |
|
ccsecurity_ops.socket_connect_permission = |
965 |
|
__ccs_socket_connect_permission; |
966 |
|
ccsecurity_ops.socket_bind_permission = __ccs_socket_bind_permission; |
967 |
|
ccsecurity_ops.socket_accept_permission = |
968 |
|
__ccs_socket_accept_permission; |
969 |
|
ccsecurity_ops.socket_sendmsg_permission = |
970 |
|
__ccs_socket_sendmsg_permission; |
971 |
|
ccsecurity_ops.socket_recvmsg_permission = |
972 |
|
__ccs_socket_recvmsg_permission; |
973 |
|
} |
974 |
|
|
975 |
|
#endif |