1 |
/* |
/* |
2 |
* fs/tomoyo_network.c |
* security/ccsecurity/network.c |
|
* |
|
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* Implementation of the Domain-Based Mandatory Access Control. |
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3 |
* |
* |
4 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Version: 1.6.8-pre 2009/05/08 |
* Version: 1.7.0-pre 2009/08/08 |
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 |
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#include <linux/ccs_common.h> |
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#include <linux/tomoyo.h> |
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#include <linux/tomoyo_socket.h> |
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#include <linux/realpath.h> |
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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> |
17 |
#include <net/ip.h> |
#include <net/ip.h> |
18 |
#include <net/ipv6.h> |
#include <net/ipv6.h> |
19 |
#include <net/udp.h> |
#include <net/udp.h> |
20 |
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#include "internal.h" |
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/* Index numbers for Network Controls. */ |
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enum ccs_network_acl_index { |
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NETWORK_ACL_UDP_BIND, |
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NETWORK_ACL_UDP_CONNECT, |
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NETWORK_ACL_TCP_BIND, |
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NETWORK_ACL_TCP_LISTEN, |
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NETWORK_ACL_TCP_CONNECT, |
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NETWORK_ACL_TCP_ACCEPT, |
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NETWORK_ACL_RAW_BIND, |
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NETWORK_ACL_RAW_CONNECT |
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}; |
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21 |
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22 |
/** |
/** |
23 |
* ccs_audit_network_log - Audit network log. |
* ccs_audit_network_log - Audit network log. |
34 |
const char *operation, const char *address, |
const char *operation, const char *address, |
35 |
const u16 port, 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 && ccs_verbose_mode(r->domain)) |
38 |
|
printk(KERN_WARNING "%s: %s to %s %u denied for %s\n", |
39 |
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ccs_get_msg(r->mode == 3), operation, address, port, |
40 |
|
ccs_get_last_name(r->domain)); |
41 |
|
return ccs_write_audit_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
42 |
"%s %s %u\n", operation, address, port); |
"%s %s %u\n", operation, address, port); |
43 |
} |
} |
44 |
|
|
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/* The list for "struct ccs_address_group_entry". */ |
|
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LIST_HEAD(ccs_address_group_list); |
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|
|
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/** |
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* ccs_get_address_group - Allocate memory for "struct ccs_address_group_entry". |
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* |
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* @group_name: The name of address group. |
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* |
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* Returns pointer to "struct ccs_address_group_entry" on success, |
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* NULL otherwise. |
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*/ |
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static struct ccs_address_group_entry *ccs_get_address_group(const char * |
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|
group_name) |
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{ |
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struct ccs_address_group_entry *entry = NULL; |
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struct ccs_address_group_entry *group; |
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const struct ccs_path_info *saved_group_name; |
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int error = -ENOMEM; |
|
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if (!ccs_is_correct_path(group_name, 0, 0, 0, __func__) || |
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!group_name[0]) |
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return NULL; |
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saved_group_name = ccs_get_name(group_name); |
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if (!saved_group_name) |
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return NULL; |
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entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
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/***** WRITER SECTION START *****/ |
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down_write(&ccs_policy_lock); |
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list_for_each_entry(group, &ccs_address_group_list, list) { |
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if (saved_group_name != group->group_name) |
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continue; |
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atomic_inc(&group->users); |
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error = 0; |
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break; |
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} |
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if (error && ccs_memory_ok(entry)) { |
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INIT_LIST_HEAD(&entry->address_group_member_list); |
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entry->group_name = saved_group_name; |
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saved_group_name = NULL; |
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atomic_set(&entry->users, 1); |
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list_add_tail(&entry->list, &ccs_address_group_list); |
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group = entry; |
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entry = NULL; |
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error = 0; |
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} |
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up_write(&ccs_policy_lock); |
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/***** WRITER SECTION END *****/ |
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ccs_put_name(saved_group_name); |
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kfree(entry); |
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return !error ? group : NULL; |
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} |
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/** |
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* ccs_update_address_group_entry - Update "struct ccs_address_group_entry" list. |
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* |
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* @group_name: The name of address group. |
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* @is_ipv6: True if @min_address and @max_address are IPv6 addresses. |
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* @min_address: Start of IPv4 or IPv6 address range. |
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* @max_address: End of IPv4 or IPv6 address range. |
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* @is_delete: True if it is a delete request. |
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* |
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* Returns 0 on success, negative value otherwise. |
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*/ |
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static int ccs_update_address_group_entry(const char *group_name, |
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const bool is_ipv6, |
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const u16 *min_address, |
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const u16 *max_address, |
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const bool is_delete) |
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{ |
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struct ccs_address_group_entry *group; |
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struct ccs_address_group_member *entry = NULL; |
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struct ccs_address_group_member *member; |
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const struct in6_addr *saved_min_address = NULL; |
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const struct in6_addr *saved_max_address = NULL; |
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int error = is_delete ? -ENOENT : -ENOMEM; |
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const u32 min_ipv4_address = ntohl(*(u32 *) min_address); |
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const u32 max_ipv4_address = ntohl(*(u32 *) max_address); |
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group = ccs_get_address_group(group_name); |
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if (!group) |
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return -ENOMEM; |
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if (is_ipv6) { |
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saved_min_address |
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= ccs_get_ipv6_address((struct in6_addr *) |
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min_address); |
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saved_max_address |
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= ccs_get_ipv6_address((struct in6_addr *) |
|
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max_address); |
|
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if (!saved_min_address || !saved_max_address) |
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goto out; |
|
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} |
|
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if (!is_delete) |
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entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
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/***** WRITER SECTION START *****/ |
|
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down_write(&ccs_policy_lock); |
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list_for_each_entry(member, &group->address_group_member_list, list) { |
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if (member->is_ipv6 != is_ipv6) |
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continue; |
|
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if (is_ipv6) { |
|
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if (member->min.ipv6 != saved_min_address || |
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member->max.ipv6 != saved_max_address) |
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continue; |
|
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} else { |
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if (member->min.ipv4 != min_ipv4_address || |
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member->max.ipv4 != max_ipv4_address) |
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continue; |
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|
} |
|
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member->is_deleted = is_delete; |
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error = 0; |
|
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break; |
|
|
} |
|
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if (!is_delete && error && ccs_memory_ok(entry)) { |
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entry->is_ipv6 = is_ipv6; |
|
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if (is_ipv6) { |
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entry->min.ipv6 = saved_min_address; |
|
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saved_min_address = NULL; |
|
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entry->max.ipv6 = saved_max_address; |
|
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saved_max_address = NULL; |
|
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} else { |
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entry->min.ipv4 = min_ipv4_address; |
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entry->max.ipv4 = max_ipv4_address; |
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} |
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list_add_tail(&entry->list, &group->address_group_member_list); |
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entry = NULL; |
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atomic_inc(&group->users); |
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error = 0; |
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} |
|
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up_write(&ccs_policy_lock); |
|
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/***** WRITER SECTION END *****/ |
|
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out: |
|
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ccs_put_ipv6_address(saved_min_address); |
|
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ccs_put_ipv6_address(saved_max_address); |
|
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ccs_put_address_group(group); |
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ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
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return error; |
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} |
|
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|
45 |
/** |
/** |
46 |
* ccs_parse_ip_address - Parse an IP address. |
* ccs_parse_ip_address - Parse an IP address. |
47 |
* |
* |
51 |
* |
* |
52 |
* Returns 2 if @address is an IPv6, 1 if @address is an IPv4, 0 otherwise. |
* Returns 2 if @address is an IPv6, 1 if @address is an IPv4, 0 otherwise. |
53 |
*/ |
*/ |
54 |
static int ccs_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", |
85 |
return 0; |
return 0; |
86 |
} |
} |
87 |
|
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/** |
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* ccs_write_address_group_policy - Write "struct ccs_address_group_entry" list. |
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* |
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* @data: String to parse. |
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* @is_delete: True if it is a delete request. |
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* |
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* Returns 0 on success, negative value otherwise. |
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*/ |
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int ccs_write_address_group_policy(char *data, const bool is_delete) |
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{ |
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bool is_ipv6; |
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u16 min_address[8]; |
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u16 max_address[8]; |
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char *cp = strchr(data, ' '); |
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if (!cp) |
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return -EINVAL; |
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*cp++ = '\0'; |
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switch (ccs_parse_ip_address(cp, min_address, max_address)) { |
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case 2: |
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is_ipv6 = true; |
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break; |
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case 1: |
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is_ipv6 = false; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return ccs_update_address_group_entry(data, is_ipv6, min_address, |
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max_address, is_delete); |
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} |
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/** |
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* ccs_address_matches_group - Check whether the given address matches members of the given address group. |
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* |
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* @is_ipv6: True if @address is an IPv6 address. |
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* @address: An IPv4 or IPv6 address. |
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* @group: Pointer to "struct ccs_address_group_entry". |
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* |
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* Returns true if @address matches addresses in @group group, false otherwise. |
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* |
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* Caller holds ccs_policy_lockfor reading. |
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*/ |
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static bool ccs_address_matches_group(const bool is_ipv6, const u32 *address, |
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const struct ccs_address_group_entry * |
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group) |
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{ |
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struct ccs_address_group_member *member; |
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const u32 ip = ntohl(*address); |
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bool matched = false; |
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list_for_each_entry(member, &group->address_group_member_list, list) { |
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if (member->is_deleted) |
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continue; |
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if (member->is_ipv6) { |
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|
if (is_ipv6 && |
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memcmp(member->min.ipv6, address, 16) <= 0 && |
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memcmp(address, member->max.ipv6, 16) <= 0) { |
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matched = true; |
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break; |
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} |
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} else { |
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if (!is_ipv6 && |
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member->min.ipv4 <= ip && ip <= member->max.ipv4) { |
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matched = true; |
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break; |
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} |
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} |
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} |
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return matched; |
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} |
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/** |
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* ccs_read_address_group_policy - Read "struct ccs_address_group_entry" list. |
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* |
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* @head: Pointer to "struct ccs_io_buffer". |
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* |
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* Returns true on success, false otherwise. |
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*/ |
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bool ccs_read_address_group_policy(struct ccs_io_buffer *head) |
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{ |
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struct list_head *gpos; |
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struct list_head *mpos; |
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bool done = true; |
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/***** READER SECTION START *****/ |
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down_read(&ccs_policy_lock); |
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list_for_each_cookie(gpos, head->read_var1.u.list, |
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&ccs_address_group_list) { |
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struct ccs_address_group_entry *group; |
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group = list_entry(gpos, struct ccs_address_group_entry, list); |
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list_for_each_cookie(mpos, head->read_var2.u.list, |
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&group->address_group_member_list) { |
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char buf[128]; |
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struct ccs_address_group_member *member; |
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member = list_entry(mpos, |
|
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struct ccs_address_group_member, |
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list); |
|
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if (member->is_deleted) |
|
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continue; |
|
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if (member->is_ipv6) { |
|
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const struct in6_addr *min_address |
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= member->min.ipv6; |
|
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const struct in6_addr *max_address |
|
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= member->max.ipv6; |
|
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ccs_print_ipv6(buf, sizeof(buf), min_address); |
|
|
if (min_address != max_address) { |
|
|
int len; |
|
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char *cp = buf + strlen(buf); |
|
|
*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)); |
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|
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", |
|
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HIPQUAD(min_address)); |
|
|
if (min_address != max_address) { |
|
|
const int len = strlen(buf); |
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|
snprintf(buf + len, |
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sizeof(buf) - 1 - len, |
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"-%u.%u.%u.%u", |
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HIPQUAD(max_address)); |
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} |
|
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} |
|
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done = ccs_io_printf(head, KEYWORD_ADDRESS_GROUP |
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"%s %s\n", group->group_name->name, |
|
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buf); |
|
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if (!done) |
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break; |
|
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} |
|
|
if (!done) |
|
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break; |
|
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} |
|
|
up_read(&ccs_policy_lock); |
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/***** READER SECTION END *****/ |
|
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return done; |
|
|
} |
|
|
|
|
88 |
#if !defined(NIP6) |
#if !defined(NIP6) |
89 |
#define NIP6(addr) \ |
#define NIP6(addr) \ |
90 |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
ntohs((addr).s6_addr16[0]), ntohs((addr).s6_addr16[1]), \ |
120 |
{ |
{ |
121 |
const char *keyword = "unknown"; |
const char *keyword = "unknown"; |
122 |
switch (operation) { |
switch (operation) { |
123 |
case NETWORK_ACL_UDP_BIND: |
case CCS_NETWORK_UDP_BIND: |
124 |
keyword = "UDP bind"; |
keyword = "UDP bind"; |
125 |
break; |
break; |
126 |
case NETWORK_ACL_UDP_CONNECT: |
case CCS_NETWORK_UDP_CONNECT: |
127 |
keyword = "UDP connect"; |
keyword = "UDP connect"; |
128 |
break; |
break; |
129 |
case NETWORK_ACL_TCP_BIND: |
case CCS_NETWORK_TCP_BIND: |
130 |
keyword = "TCP bind"; |
keyword = "TCP bind"; |
131 |
break; |
break; |
132 |
case NETWORK_ACL_TCP_LISTEN: |
case CCS_NETWORK_TCP_LISTEN: |
133 |
keyword = "TCP listen"; |
keyword = "TCP listen"; |
134 |
break; |
break; |
135 |
case NETWORK_ACL_TCP_CONNECT: |
case CCS_NETWORK_TCP_CONNECT: |
136 |
keyword = "TCP connect"; |
keyword = "TCP connect"; |
137 |
break; |
break; |
138 |
case NETWORK_ACL_TCP_ACCEPT: |
case CCS_NETWORK_TCP_ACCEPT: |
139 |
keyword = "TCP accept"; |
keyword = "TCP accept"; |
140 |
break; |
break; |
141 |
case NETWORK_ACL_RAW_BIND: |
case CCS_NETWORK_RAW_BIND: |
142 |
keyword = "RAW bind"; |
keyword = "RAW bind"; |
143 |
break; |
break; |
144 |
case NETWORK_ACL_RAW_CONNECT: |
case CCS_NETWORK_RAW_CONNECT: |
145 |
keyword = "RAW connect"; |
keyword = "RAW connect"; |
146 |
break; |
break; |
147 |
} |
} |
149 |
} |
} |
150 |
|
|
151 |
/** |
/** |
152 |
* ccs_update_network_entry - Update "struct ccs_ip_network_acl_record" list. |
* ccs_check_network_entry2 - Check permission for network operation. |
|
* |
|
|
* @operation: Type of operation. |
|
|
* @record_type: Type of address. |
|
|
* @group: Name of group. May be NULL. |
|
|
* @min_address: Start of IPv4 or IPv6 address range. |
|
|
* @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 ccs_domain_info". |
|
|
* @condition: Pointer to "struct ccs_condition_list". May be NULL. |
|
|
* @is_delete: True if it is a delete request. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int ccs_update_network_entry(const u8 operation, const u8 record_type, |
|
|
const char *group_name, |
|
|
const u32 *min_address, |
|
|
const u32 *max_address, |
|
|
const u16 min_port, const u16 max_port, |
|
|
struct ccs_domain_info *domain, |
|
|
struct ccs_condition_list *condition, |
|
|
const bool is_delete) |
|
|
{ |
|
|
struct ccs_ip_network_acl_record *entry = NULL; |
|
|
struct ccs_acl_info *ptr; |
|
|
int error = is_delete ? -ENOENT : -ENOMEM; |
|
|
/* using host byte order to allow u32 comparison than memcmp().*/ |
|
|
const u32 min_ip = ntohl(*min_address); |
|
|
const u32 max_ip = ntohl(*max_address); |
|
|
const struct in6_addr *saved_min_address = NULL; |
|
|
const struct in6_addr *saved_max_address = NULL; |
|
|
struct ccs_address_group_entry *group = NULL; |
|
|
if (!domain) |
|
|
return -EINVAL; |
|
|
if (group_name) { |
|
|
group = ccs_get_address_group(group_name); |
|
|
if (!group) |
|
|
return -ENOMEM; |
|
|
} else if (record_type == IP_RECORD_TYPE_IPv6) { |
|
|
saved_min_address = ccs_get_ipv6_address((struct in6_addr *) |
|
|
min_address); |
|
|
saved_max_address = ccs_get_ipv6_address((struct in6_addr *) |
|
|
max_address); |
|
|
if (!saved_min_address || !saved_max_address) |
|
|
goto out; |
|
|
} |
|
|
if (is_delete) |
|
|
goto delete; |
|
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
|
|
/***** WRITER SECTION START *****/ |
|
|
down_write(&ccs_policy_lock); |
|
|
list_for_each_entry(ptr, &domain->acl_info_list, list) { |
|
|
struct ccs_ip_network_acl_record *acl; |
|
|
if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) |
|
|
continue; |
|
|
if (ptr->cond != condition) |
|
|
continue; |
|
|
acl = container_of(ptr, struct ccs_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; |
|
|
} |
|
|
error = ccs_add_domain_acl(NULL, ptr); |
|
|
break; |
|
|
} |
|
|
if (error && ccs_memory_ok(entry)) { |
|
|
entry->head.type = TYPE_IP_NETWORK_ACL; |
|
|
entry->head.cond = condition; |
|
|
entry->operation_type = operation; |
|
|
entry->record_type = record_type; |
|
|
if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
|
|
entry->u.group = group; |
|
|
group = NULL; |
|
|
} else if (record_type == IP_RECORD_TYPE_IPv4) { |
|
|
entry->u.ipv4.min = min_ip; |
|
|
entry->u.ipv4.max = max_ip; |
|
|
} else { |
|
|
entry->u.ipv6.min = saved_min_address; |
|
|
saved_min_address = NULL; |
|
|
entry->u.ipv6.max = saved_max_address; |
|
|
saved_max_address = NULL; |
|
|
} |
|
|
entry->min_port = min_port; |
|
|
entry->max_port = max_port; |
|
|
error = ccs_add_domain_acl(domain, &entry->head); |
|
|
entry = NULL; |
|
|
} |
|
|
up_write(&ccs_policy_lock); |
|
|
/***** WRITER SECTION END *****/ |
|
|
goto out; |
|
|
delete: |
|
|
/***** WRITER SECTION START *****/ |
|
|
down_write(&ccs_policy_lock); |
|
|
list_for_each_entry(ptr, &domain->acl_info_list, list) { |
|
|
struct ccs_ip_network_acl_record *acl; |
|
|
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
|
|
continue; |
|
|
if (ptr->cond != condition) |
|
|
continue; |
|
|
acl = container_of(ptr, struct ccs_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; |
|
|
} |
|
|
error = ccs_del_domain_acl(ptr); |
|
|
break; |
|
|
} |
|
|
up_write(&ccs_policy_lock); |
|
|
/***** WRITER SECTION END *****/ |
|
|
out: |
|
|
ccs_put_ipv6_address(saved_min_address); |
|
|
ccs_put_ipv6_address(saved_max_address); |
|
|
ccs_put_address_group(group); |
|
|
kfree(entry); |
|
|
return error; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_check_network_entry - Check permission for network operation. |
|
153 |
* |
* |
154 |
* @is_ipv6: True if @address is an IPv6 address. |
* @is_ipv6: True if @address is an IPv6 address. |
155 |
* @operation: Type of operation. |
* @operation: Type of operation. |
157 |
* @port: Port number. |
* @port: Port number. |
158 |
* |
* |
159 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
160 |
|
* |
161 |
|
* Caller holds ccs_read_lock(). |
162 |
*/ |
*/ |
163 |
static int ccs_check_network_entry(const bool is_ipv6, const u8 operation, |
static int ccs_check_network_entry2(const bool is_ipv6, const u8 operation, |
164 |
const u32 *address, const u16 port) |
const u32 *address, const u16 port) |
165 |
{ |
{ |
166 |
struct ccs_request_info r; |
struct ccs_request_info r; |
167 |
struct ccs_acl_info *ptr; |
struct ccs_acl_info *ptr; |
168 |
const char *keyword = ccs_net2keyword(operation); |
const char *keyword = ccs_net2keyword(operation); |
169 |
bool is_enforce; |
bool is_enforce; |
170 |
|
const u16 perm = 1 << operation; |
171 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
/* using host byte order to allow u32 comparison than memcmp().*/ |
172 |
const u32 ip = ntohl(*address); |
const u32 ip = ntohl(*address); |
173 |
bool found = false; |
int error; |
|
int error = -EPERM; |
|
174 |
char buf[64]; |
char buf[64]; |
175 |
if (!ccs_can_sleep()) |
ccs_check_read_lock(); |
176 |
|
if (!ccs_can_sleep() || |
177 |
|
!ccs_init_request_info(&r, NULL, CCS_MAC_NETWORK)) |
178 |
return 0; |
return 0; |
|
ccs_init_request_info(&r, NULL, CCS_MAC_FOR_NETWORK); |
|
179 |
is_enforce = (r.mode == 3); |
is_enforce = (r.mode == 3); |
|
if (!r.mode) { |
|
|
error = 0; |
|
|
goto done; |
|
|
} |
|
180 |
retry: |
retry: |
181 |
/***** READER SECTION START *****/ |
error = -EPERM; |
182 |
down_read(&ccs_policy_lock); |
list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
183 |
list_for_each_entry(ptr, &r.cookie.u.domain->acl_info_list, list) { |
struct ccs_ip_network_acl *acl; |
184 |
struct ccs_ip_network_acl_record *acl; |
if (ptr->is_deleted || ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
185 |
if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) |
continue; |
186 |
|
acl = container_of(ptr, struct ccs_ip_network_acl, head); |
187 |
|
if (!(acl->perm & perm)) |
188 |
continue; |
continue; |
189 |
acl = container_of(ptr, struct ccs_ip_network_acl_record, head); |
if (!ccs_compare_number_union(port, &acl->port) || |
190 |
if (acl->operation_type != operation || port < acl->min_port || |
!ccs_check_condition(&r, ptr)) |
|
acl->max_port < port || !ccs_check_condition(&r, ptr)) |
|
191 |
continue; |
continue; |
192 |
if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { |
if (acl->address_type == CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP) { |
193 |
if (!ccs_address_matches_group(is_ipv6, address, |
if (!ccs_address_matches_group(is_ipv6, address, |
194 |
acl->u.group)) |
acl->address.group)) |
195 |
continue; |
continue; |
196 |
} else if (acl->record_type == IP_RECORD_TYPE_IPv4) { |
} else if (acl->address_type == CCS_IP_ADDRESS_TYPE_IPv4) { |
197 |
if (is_ipv6 || |
if (is_ipv6 || |
198 |
ip < acl->u.ipv4.min || acl->u.ipv4.max < ip) |
ip < acl->address.ipv4.min || |
199 |
|
acl->address.ipv4.max < ip) |
200 |
continue; |
continue; |
201 |
} else { |
} else { |
202 |
if (!is_ipv6 || |
if (!is_ipv6 || |
203 |
memcmp(acl->u.ipv6.min, address, 16) > 0 || |
memcmp(acl->address.ipv6.min, address, 16) > 0 || |
204 |
memcmp(address, acl->u.ipv6.max, 16) > 0) |
memcmp(address, acl->address.ipv6.max, 16) > 0) |
205 |
continue; |
continue; |
206 |
} |
} |
207 |
r.condition_cookie.u.cond = ptr->cond; |
r.cond = ptr->cond; |
208 |
found = true; |
error = 0; |
209 |
break; |
break; |
210 |
} |
} |
|
up_read(&ccs_policy_lock); |
|
|
/***** READER SECTION END *****/ |
|
211 |
memset(buf, 0, sizeof(buf)); |
memset(buf, 0, sizeof(buf)); |
212 |
if (is_ipv6) |
if (is_ipv6) |
213 |
ccs_print_ipv6(buf, sizeof(buf), |
ccs_print_ipv6(buf, sizeof(buf), |
214 |
(const struct in6_addr *) address); |
(const struct in6_addr *) address); |
215 |
else |
else |
216 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
217 |
ccs_audit_network_log(&r, keyword, buf, port, found); |
ccs_audit_network_log(&r, keyword, buf, port, !error); |
218 |
if (found) { |
if (error) |
219 |
|
error = ccs_check_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
220 |
|
"%s %s %u\n", keyword, buf, port); |
221 |
|
if (error == 1) |
222 |
|
goto retry; |
223 |
|
if (!is_enforce) |
224 |
error = 0; |
error = 0; |
|
goto done; |
|
|
} |
|
|
if (ccs_verbose_mode(r.cookie.u.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.cookie.u.domain)); |
|
|
if (is_enforce) { |
|
|
int err = ccs_check_supervisor(&r, KEYWORD_ALLOW_NETWORK |
|
|
"%s %s %u\n", keyword, buf, |
|
|
port); |
|
|
if (err == 1) |
|
|
goto retry; |
|
|
error = err; |
|
|
goto done; |
|
|
} |
|
|
if (r.mode == 1 && ccs_domain_quota_ok(r.cookie.u.domain)) |
|
|
ccs_update_network_entry(operation, is_ipv6 ? |
|
|
IP_RECORD_TYPE_IPv6 : |
|
|
IP_RECORD_TYPE_IPv4, |
|
|
NULL, address, address, port, port, |
|
|
r.cookie.u.domain, ccs_handler_cond(), |
|
|
false); |
|
|
error = 0; |
|
|
done: |
|
|
ccs_exit_request_info(&r); |
|
225 |
return error; |
return error; |
226 |
} |
} |
227 |
|
|
228 |
/** |
/** |
229 |
* ccs_write_network_policy - Write "struct ccs_ip_network_acl_record" list. |
* ccs_check_network_entry - Check permission for network operation. |
230 |
|
* |
231 |
|
* @is_ipv6: True if @address is an IPv6 address. |
232 |
|
* @operation: Type of operation. |
233 |
|
* @address: An IPv4 or IPv6 address. |
234 |
|
* @port: Port number. |
235 |
|
* |
236 |
|
* Returns 0 on success, negative value otherwise. |
237 |
|
*/ |
238 |
|
static int ccs_check_network_entry(const bool is_ipv6, const u8 operation, |
239 |
|
const u32 *address, const u16 port) |
240 |
|
{ |
241 |
|
const int idx = ccs_read_lock(); |
242 |
|
const int error = ccs_check_network_entry2(is_ipv6, operation, |
243 |
|
address, port); |
244 |
|
ccs_read_unlock(idx); |
245 |
|
return error; |
246 |
|
} |
247 |
|
|
248 |
|
/** |
249 |
|
* ccs_write_network_policy - Write "struct ccs_ip_network_acl" list. |
250 |
* |
* |
251 |
* @data: String to parse. |
* @data: String to parse. |
252 |
* @domain: Pointer to "struct ccs_domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
253 |
* @condition: Pointer to "struct ccs_condition_list". May be NULL. |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
254 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
255 |
* |
* |
256 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
257 |
*/ |
*/ |
258 |
int ccs_write_network_policy(char *data, struct ccs_domain_info *domain, |
int ccs_write_network_policy(char *data, struct ccs_domain_info *domain, |
259 |
struct ccs_condition_list *condition, |
struct ccs_condition *condition, |
260 |
const bool is_delete) |
const bool is_delete) |
261 |
{ |
{ |
262 |
u8 sock_type; |
struct ccs_ip_network_acl *entry = NULL; |
263 |
u8 operation; |
struct ccs_acl_info *ptr; |
264 |
u8 record_type; |
struct ccs_ip_network_acl e = { |
265 |
|
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
266 |
|
.head.cond = condition, |
267 |
|
}; |
268 |
u16 min_address[8]; |
u16 min_address[8]; |
269 |
u16 max_address[8]; |
u16 max_address[8]; |
270 |
const char *group_name = NULL; |
int error = is_delete ? -ENOENT : -ENOMEM; |
271 |
u16 min_port; |
u8 sock_type; |
272 |
u16 max_port; |
char *w[4]; |
273 |
u8 count; |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
274 |
char *cp1 = strchr(data, ' '); |
return -EINVAL; |
275 |
char *cp2; |
if (!strcmp(w[0], "TCP")) |
|
if (!cp1) |
|
|
goto out; |
|
|
cp1++; |
|
|
if (!strncmp(data, "TCP ", 4)) |
|
276 |
sock_type = SOCK_STREAM; |
sock_type = SOCK_STREAM; |
277 |
else if (!strncmp(data, "UDP ", 4)) |
else if (!strcmp(w[0], "UDP")) |
278 |
sock_type = SOCK_DGRAM; |
sock_type = SOCK_DGRAM; |
279 |
else if (!strncmp(data, "RAW ", 4)) |
else if (!strcmp(w[0], "RAW")) |
280 |
sock_type = SOCK_RAW; |
sock_type = SOCK_RAW; |
281 |
else |
else |
282 |
goto out; |
return -EINVAL; |
283 |
cp2 = strchr(cp1, ' '); |
if (!strcmp(w[1], "bind")) |
|
if (!cp2) |
|
|
goto out; |
|
|
cp2++; |
|
|
if (!strncmp(cp1, "bind ", 5)) |
|
284 |
switch (sock_type) { |
switch (sock_type) { |
285 |
case SOCK_STREAM: |
case SOCK_STREAM: |
286 |
operation = NETWORK_ACL_TCP_BIND; |
e.perm = 1 << CCS_NETWORK_TCP_BIND; |
287 |
break; |
break; |
288 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
289 |
operation = NETWORK_ACL_UDP_BIND; |
e.perm = 1 << CCS_NETWORK_UDP_BIND; |
290 |
break; |
break; |
291 |
default: |
default: |
292 |
operation = NETWORK_ACL_RAW_BIND; |
e.perm = 1 << CCS_NETWORK_RAW_BIND; |
293 |
|
break; |
294 |
} |
} |
295 |
else if (!strncmp(cp1, "connect ", 8)) |
else if (!strcmp(w[1], "connect")) |
296 |
switch (sock_type) { |
switch (sock_type) { |
297 |
case SOCK_STREAM: |
case SOCK_STREAM: |
298 |
operation = NETWORK_ACL_TCP_CONNECT; |
e.perm = 1 << CCS_NETWORK_TCP_CONNECT; |
299 |
break; |
break; |
300 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
301 |
operation = NETWORK_ACL_UDP_CONNECT; |
e.perm = 1 << CCS_NETWORK_UDP_CONNECT; |
302 |
break; |
break; |
303 |
default: |
default: |
304 |
operation = NETWORK_ACL_RAW_CONNECT; |
e.perm = 1 << CCS_NETWORK_RAW_CONNECT; |
305 |
|
break; |
306 |
} |
} |
307 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "listen ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "listen")) |
308 |
operation = NETWORK_ACL_TCP_LISTEN; |
e.perm = 1 << CCS_NETWORK_TCP_LISTEN; |
309 |
else if (sock_type == SOCK_STREAM && !strncmp(cp1, "accept ", 7)) |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "accept")) |
310 |
operation = NETWORK_ACL_TCP_ACCEPT; |
e.perm = 1 << CCS_NETWORK_TCP_ACCEPT; |
311 |
else |
else |
312 |
goto out; |
return -EINVAL; |
313 |
cp1 = strchr(cp2, ' '); |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
|
if (!cp1) |
|
|
goto out; |
|
|
*cp1++ = '\0'; |
|
|
switch (ccs_parse_ip_address(cp2, min_address, max_address)) { |
|
314 |
case 2: |
case 2: |
315 |
record_type = IP_RECORD_TYPE_IPv6; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
316 |
|
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
317 |
|
min_address); |
318 |
|
e.address.ipv6.max = ccs_get_ipv6_address((struct in6_addr *) |
319 |
|
max_address); |
320 |
|
if (!e.address.ipv6.min || !e.address.ipv6.max) |
321 |
|
goto out; |
322 |
break; |
break; |
323 |
case 1: |
case 1: |
324 |
record_type = IP_RECORD_TYPE_IPv4; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
325 |
|
/* use host byte order to allow u32 comparison.*/ |
326 |
|
e.address.ipv4.min = ntohl(* (u32 *) min_address); |
327 |
|
e.address.ipv4.max = ntohl(* (u32 *) max_address); |
328 |
break; |
break; |
329 |
default: |
default: |
330 |
if (*cp2 != '@') |
if (w[2][0] != '@') |
331 |
goto out; |
return -EINVAL; |
332 |
group_name = cp2 + 1; |
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
333 |
record_type = IP_RECORD_TYPE_ADDRESS_GROUP; |
e.address.group = ccs_get_address_group(w[2] + 1); |
334 |
|
if (!e.address.group) |
335 |
|
return -ENOMEM; |
336 |
break; |
break; |
337 |
} |
} |
338 |
if (strchr(cp1, ' ')) |
if (!ccs_parse_number_union(w[3], &e.port)) |
339 |
goto out; |
goto out; |
340 |
count = sscanf(cp1, "%hu-%hu", &min_port, &max_port); |
if (!is_delete) |
341 |
if (count != 1 && count != 2) |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
342 |
goto out; |
mutex_lock(&ccs_policy_lock); |
343 |
if (count == 1) |
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
344 |
max_port = min_port; |
struct ccs_ip_network_acl *acl = |
345 |
return ccs_update_network_entry(operation, record_type, group_name, |
container_of(ptr, struct ccs_ip_network_acl, |
346 |
(u32 *) min_address, |
head); |
347 |
(u32 *) max_address, |
if (ptr->type != CCS_TYPE_IP_NETWORK_ACL || |
348 |
min_port, max_port, domain, condition, |
ptr->cond != condition || |
349 |
is_delete); |
ccs_memcmp(acl, &e, offsetof(typeof(e), address_type), |
350 |
|
sizeof(e))) |
351 |
|
continue; |
352 |
|
if (is_delete) { |
353 |
|
acl->perm &= ~e.perm; |
354 |
|
if (!acl->perm) |
355 |
|
ptr->is_deleted = true; |
356 |
|
} else { |
357 |
|
if (ptr->is_deleted) |
358 |
|
acl->perm = 0; |
359 |
|
acl->perm |= e.perm; |
360 |
|
ptr->is_deleted = false; |
361 |
|
} |
362 |
|
error = 0; |
363 |
|
break; |
364 |
|
} |
365 |
|
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
366 |
|
ccs_add_domain_acl(domain, &entry->head); |
367 |
|
entry = NULL; |
368 |
|
error = 0; |
369 |
|
} |
370 |
|
mutex_unlock(&ccs_policy_lock); |
371 |
out: |
out: |
372 |
return -EINVAL; |
if (w[2][0] == '@') |
373 |
|
ccs_put_address_group(e.address.group); |
374 |
|
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
375 |
|
ccs_put_ipv6_address(e.address.ipv6.min); |
376 |
|
ccs_put_ipv6_address(e.address.ipv6.max); |
377 |
|
} |
378 |
|
ccs_put_number_union(&e.port); |
379 |
|
kfree(entry); |
380 |
|
return error; |
381 |
} |
} |
382 |
|
|
383 |
/** |
/** |
393 |
const u8 *address, |
const u8 *address, |
394 |
const u16 port) |
const u16 port) |
395 |
{ |
{ |
396 |
return ccs_check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, |
return ccs_check_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
397 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
398 |
} |
} |
399 |
|
|
415 |
u8 operation; |
u8 operation; |
416 |
switch (sock_type) { |
switch (sock_type) { |
417 |
case SOCK_STREAM: |
case SOCK_STREAM: |
418 |
operation = NETWORK_ACL_TCP_CONNECT; |
operation = CCS_NETWORK_TCP_CONNECT; |
419 |
break; |
break; |
420 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
421 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
422 |
break; |
break; |
423 |
default: |
default: |
424 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
425 |
} |
} |
426 |
return ccs_check_network_entry(is_ipv6, operation, |
return ccs_check_network_entry(is_ipv6, operation, |
427 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
443 |
u8 operation; |
u8 operation; |
444 |
switch (sock_type) { |
switch (sock_type) { |
445 |
case SOCK_STREAM: |
case SOCK_STREAM: |
446 |
operation = NETWORK_ACL_TCP_BIND; |
operation = CCS_NETWORK_TCP_BIND; |
447 |
break; |
break; |
448 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
449 |
operation = NETWORK_ACL_UDP_BIND; |
operation = CCS_NETWORK_UDP_BIND; |
450 |
break; |
break; |
451 |
default: |
default: |
452 |
operation = NETWORK_ACL_RAW_BIND; |
operation = CCS_NETWORK_RAW_BIND; |
453 |
} |
} |
454 |
return ccs_check_network_entry(is_ipv6, operation, |
return ccs_check_network_entry(is_ipv6, operation, |
455 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
470 |
{ |
{ |
471 |
int retval; |
int retval; |
472 |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
473 |
retval = ccs_check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, |
retval = ccs_check_network_entry(is_ipv6, CCS_NETWORK_TCP_ACCEPT, |
474 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
475 |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
476 |
return retval; |
return retval; |
493 |
{ |
{ |
494 |
u8 operation; |
u8 operation; |
495 |
if (sock_type == SOCK_DGRAM) |
if (sock_type == SOCK_DGRAM) |
496 |
operation = NETWORK_ACL_UDP_CONNECT; |
operation = CCS_NETWORK_UDP_CONNECT; |
497 |
else |
else |
498 |
operation = NETWORK_ACL_RAW_CONNECT; |
operation = CCS_NETWORK_RAW_CONNECT; |
499 |
return ccs_check_network_entry(is_ipv6, operation, |
return ccs_check_network_entry(is_ipv6, operation, |
500 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |
501 |
} |
} |
518 |
int retval; |
int retval; |
519 |
const u8 operation |
const u8 operation |
520 |
= (sock_type == SOCK_DGRAM) ? |
= (sock_type == SOCK_DGRAM) ? |
521 |
NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; |
CCS_NETWORK_UDP_CONNECT : CCS_NETWORK_RAW_CONNECT; |
522 |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
523 |
retval = ccs_check_network_entry(is_ipv6, operation, |
retval = ccs_check_network_entry(is_ipv6, operation, |
524 |
(const u32 *) address, ntohs(port)); |
(const u32 *) address, ntohs(port)); |