1 |
/* |
/* |
2 |
* security/ccsecurity/network.c |
* security/ccsecurity/network.c |
3 |
* |
* |
4 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
* Copyright (C) 2005-2010 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Version: 1.7.0-pre 2009/08/24 |
* Version: 1.8.0-pre 2010/08/01 |
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. |
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 |
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#include <linux/un.h> |
18 |
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#include <net/sock.h> |
19 |
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#include <net/af_unix.h> |
20 |
#include <net/ip.h> |
#include <net/ip.h> |
21 |
#include <net/ipv6.h> |
#include <net/ipv6.h> |
22 |
#include <net/udp.h> |
#include <net/udp.h> |
23 |
#include "internal.h" |
#include "internal.h" |
24 |
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|
25 |
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struct ccs_inet_addr_info { |
26 |
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u16 port; /* In network byte order. */ |
27 |
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const u32 *address; /* In network byte order. */ |
28 |
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bool is_ipv6; |
29 |
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}; |
30 |
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31 |
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struct ccs_unix_addr_info { |
32 |
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u8 *addr; |
33 |
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unsigned int addr_len; |
34 |
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}; |
35 |
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36 |
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struct ccs_addr_info { |
37 |
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u8 protocol; |
38 |
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u8 operation; |
39 |
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struct ccs_inet_addr_info inet; |
40 |
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struct ccs_unix_addr_info unix0; |
41 |
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}; |
42 |
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43 |
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const char *ccs_inet_keyword[CCS_MAX_INET_PROTOCOL] = { |
44 |
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[CCS_NETWORK_INET_TCP_PROTOCOL] = "TCP", |
45 |
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[CCS_NETWORK_INET_UDP_PROTOCOL] = "UDP", |
46 |
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[CCS_NETWORK_INET_RAW_PROTOCOL] = "RAW", |
47 |
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}; |
48 |
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|
49 |
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const char *ccs_unix_keyword[CCS_MAX_UNIX_PROTOCOL] = { |
50 |
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[CCS_NETWORK_UNIX_STREAM_PROTOCOL] = "stream", |
51 |
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[CCS_NETWORK_UNIX_DGRAM_PROTOCOL] = "dgram", |
52 |
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[CCS_NETWORK_UNIX_SEQPACKET_PROTOCOL] = "seqpacket", |
53 |
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}; |
54 |
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|
55 |
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const char *ccs_net_keyword[CCS_MAX_NETWORK_OPERATION] = { |
56 |
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[CCS_NETWORK_BIND] = "bind", |
57 |
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[CCS_NETWORK_LISTEN] = "listen", |
58 |
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[CCS_NETWORK_CONNECT] = "connect", |
59 |
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[CCS_NETWORK_ACCEPT] = "accept", |
60 |
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[CCS_NETWORK_SEND] = "send", |
61 |
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[CCS_NETWORK_RECV] = "recv", |
62 |
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}; |
63 |
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|
64 |
/** |
/** |
65 |
* ccs_audit_network_log - Audit network log. |
* ccs_audit_inet_log - Audit INET network log. |
66 |
* |
* |
67 |
* @r: Pointer to "struct ccs_request_info". |
* @r: Pointer to "struct ccs_request_info". |
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* @operation: The name of operation. |
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* @address: An IPv4 or IPv6 address. |
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* @port: Port number. |
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* @is_granted: True if this is a granted log. |
|
68 |
* |
* |
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* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
70 |
*/ |
*/ |
71 |
static int ccs_audit_network_log(struct ccs_request_info *r, |
static int ccs_audit_inet_log(struct ccs_request_info *r) |
72 |
const char *operation, const char *address, |
{ |
73 |
const u16 port, const bool is_granted) |
char buf[128]; |
74 |
{ |
const char *protocol = |
75 |
if (!is_granted) |
ccs_inet_keyword[r->param.inet_network.protocol]; |
76 |
ccs_warn_log(r, "%s %s %u", operation, address, port); |
const char *operation = ccs_net_keyword[r->param.inet_network.operation]; |
77 |
return ccs_write_audit_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
const u32 *address = r->param.inet_network.address; |
78 |
"%s %s %u\n", operation, address, port); |
const u16 port = r->param.inet_network.port; |
79 |
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if (r->param.inet_network.is_ipv6) |
80 |
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ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
81 |
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address, (const struct in6_addr *) address); |
82 |
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else |
83 |
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ccs_print_ipv4(buf, sizeof(buf), r->param.inet_network.ip, |
84 |
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r->param.inet_network.ip); |
85 |
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ccs_write_log(r, "network inet %s %s %s %u\n", protocol, operation, |
86 |
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buf, port); |
87 |
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if (r->granted) |
88 |
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return 0; |
89 |
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ccs_warn_log(r, "network inet %s %s %s %u", protocol, operation, buf, |
90 |
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port); |
91 |
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return ccs_supervisor(r, "network inet %s %s %s %u\n", protocol, |
92 |
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operation, buf, port); |
93 |
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} |
94 |
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|
95 |
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/** |
96 |
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* ccs_audit_unix_log - Audit UNIX network log. |
97 |
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* |
98 |
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* @r: Pointer to "struct ccs_request_info". |
99 |
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* |
100 |
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* Returns 0 on success, negative value otherwise. |
101 |
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*/ |
102 |
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static int ccs_audit_unix_log(struct ccs_request_info *r) |
103 |
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{ |
104 |
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const char *protocol = |
105 |
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ccs_unix_keyword[r->param.unix_network.protocol]; |
106 |
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const char *operation = |
107 |
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ccs_net_keyword[r->param.unix_network.operation]; |
108 |
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const char *address = r->param.unix_network.address->name; |
109 |
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ccs_write_log(r, "network unix %s %s %s\n", protocol, operation, |
110 |
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address); |
111 |
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if (r->granted) |
112 |
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return 0; |
113 |
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ccs_warn_log(r, "network unix %s %s %s", protocol, operation, address); |
114 |
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return ccs_supervisor(r, "network unix %s %s %s\n", protocol, |
115 |
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operation, address); |
116 |
} |
} |
117 |
|
|
118 |
/** |
/** |
122 |
* @min: Pointer to store min address. |
* @min: Pointer to store min address. |
123 |
* @max: Pointer to store max address. |
* @max: Pointer to store max address. |
124 |
* |
* |
125 |
* 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, |
126 |
|
* CCS_IP_ADDRESS_TYPE_IPv4 if @address is an IPv4, |
127 |
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* CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP otherwise. |
128 |
*/ |
*/ |
129 |
int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
130 |
{ |
{ |
142 |
min[i] = htons(min[i]); |
min[i] = htons(min[i]); |
143 |
max[i] = htons(max[i]); |
max[i] = htons(max[i]); |
144 |
} |
} |
145 |
return 2; |
return CCS_IP_ADDRESS_TYPE_IPv6; |
146 |
} |
} |
147 |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
148 |
&min[0], &min[1], &min[2], &min[3], |
&min[0], &min[1], &min[2], &min[3], |
152 |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
153 |
memmove(min, &ip, sizeof(ip)); |
memmove(min, &ip, sizeof(ip)); |
154 |
if (count == 8) |
if (count == 8) |
155 |
ip = htonl((((u8) max[0]) << 24) + (((u8) max[1]) << 16) |
ip = htonl((((u8) max[0]) << 24) |
156 |
|
+ (((u8) max[1]) << 16) |
157 |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
158 |
memmove(max, &ip, sizeof(ip)); |
memmove(max, &ip, sizeof(ip)); |
159 |
return 1; |
return CCS_IP_ADDRESS_TYPE_IPv4; |
160 |
} |
} |
161 |
return 0; |
return CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
162 |
|
} |
163 |
|
|
164 |
|
/** |
165 |
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* ccs_print_ipv4 - Print an IPv4 address. |
166 |
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* |
167 |
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* @buffer: Buffer to write to. |
168 |
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* @buffer_len: Size of @buffer. |
169 |
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* @min_ip: Min address in host byte order. |
170 |
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* @max_ip: Max address in host byte order. |
171 |
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* |
172 |
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* Returns nothing. |
173 |
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*/ |
174 |
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void ccs_print_ipv4(char *buffer, const int buffer_len, |
175 |
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const u32 min_ip, const u32 max_ip) |
176 |
|
{ |
177 |
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memset(buffer, 0, buffer_len); |
178 |
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snprintf(buffer, buffer_len - 1, "%u.%u.%u.%u%c%u.%u.%u.%u", |
179 |
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HIPQUAD(min_ip), min_ip == max_ip ? '\0' : '-', |
180 |
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HIPQUAD(max_ip)); |
181 |
} |
} |
182 |
|
|
183 |
#if !defined(NIP6) |
#if !defined(NIP6) |
193 |
* |
* |
194 |
* @buffer: Buffer to write to. |
* @buffer: Buffer to write to. |
195 |
* @buffer_len: Size of @buffer. |
* @buffer_len: Size of @buffer. |
196 |
* @ip: Pointer to "struct in6_addr". |
* @min_ip: Pointer to "struct in6_addr". |
197 |
|
* @max_ip: Pointer to "struct in6_addr". |
198 |
* |
* |
199 |
* Returns nothing. |
* Returns nothing. |
200 |
*/ |
*/ |
201 |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
202 |
const struct in6_addr *ip) |
const struct in6_addr *min_ip, |
203 |
|
const struct in6_addr *max_ip) |
204 |
{ |
{ |
205 |
memset(buffer, 0, buffer_len); |
memset(buffer, 0, buffer_len); |
206 |
snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", NIP6(*ip)); |
snprintf(buffer, buffer_len - 1, |
207 |
} |
"%x:%x:%x:%x:%x:%x:%x:%x%c%x:%x:%x:%x:%x:%x:%x:%x", |
208 |
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NIP6(*min_ip), min_ip == max_ip ? '\0' : '-', |
209 |
/** |
NIP6(*max_ip)); |
210 |
* ccs_net2keyword - Convert network operation index to network operation name. |
} |
211 |
* |
|
212 |
* @operation: Type of operation. |
static bool ccs_check_inet_acl(struct ccs_request_info *r, |
213 |
* |
const struct ccs_acl_info *ptr) |
214 |
* Returns the name of operation. |
{ |
215 |
*/ |
const struct ccs_inet_acl *acl = container_of(ptr, typeof(*acl), head); |
216 |
const char *ccs_net2keyword(const u8 operation) |
bool ret; |
217 |
{ |
if (!(acl->perm & (1 << r->param.inet_network.operation)) || |
218 |
const char *keyword = "unknown"; |
!ccs_compare_number_union(r->param.inet_network.port, &acl->port)) |
219 |
switch (operation) { |
return false; |
220 |
case CCS_NETWORK_UDP_BIND: |
switch (acl->address_type) { |
221 |
keyword = "UDP bind"; |
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
222 |
break; |
ret = ccs_address_matches_group(r->param.inet_network.is_ipv6, |
223 |
case CCS_NETWORK_UDP_CONNECT: |
r->param.inet_network.address, |
224 |
keyword = "UDP connect"; |
acl->address.group); |
225 |
break; |
break; |
226 |
case CCS_NETWORK_TCP_BIND: |
case CCS_IP_ADDRESS_TYPE_IPv4: |
227 |
keyword = "TCP bind"; |
ret = !r->param.inet_network.is_ipv6 && |
228 |
break; |
acl->address.ipv4.min <= r->param.inet_network.ip && |
229 |
case CCS_NETWORK_TCP_LISTEN: |
r->param.inet_network.ip <= acl->address.ipv4.max; |
|
keyword = "TCP listen"; |
|
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break; |
|
|
case CCS_NETWORK_TCP_CONNECT: |
|
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keyword = "TCP connect"; |
|
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break; |
|
|
case CCS_NETWORK_TCP_ACCEPT: |
|
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keyword = "TCP accept"; |
|
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break; |
|
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case CCS_NETWORK_RAW_BIND: |
|
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keyword = "RAW bind"; |
|
230 |
break; |
break; |
231 |
case CCS_NETWORK_RAW_CONNECT: |
default: |
232 |
keyword = "RAW connect"; |
ret = r->param.inet_network.is_ipv6 && |
233 |
break; |
memcmp(acl->address.ipv6.min, |
234 |
} |
r->param.inet_network.address, 16) <= 0 && |
235 |
return keyword; |
memcmp(r->param.inet_network.address, |
236 |
} |
acl->address.ipv6.max, 16) <= 0; |
237 |
|
break; |
238 |
|
} |
239 |
|
return ret; |
240 |
|
} |
241 |
|
|
242 |
|
static bool ccs_check_unix_acl(struct ccs_request_info *r, |
243 |
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const struct ccs_acl_info *ptr) |
244 |
|
{ |
245 |
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const struct ccs_unix_acl *acl = container_of(ptr, typeof(*acl), head); |
246 |
|
return (acl->perm & (1 << r->param.unix_network.operation)) && |
247 |
|
ccs_compare_name_union(r->param.unix_network.address, |
248 |
|
&acl->name); |
249 |
|
} |
250 |
|
|
251 |
|
static const u8 |
252 |
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ccs_inet2mac[CCS_MAX_INET_PROTOCOL][CCS_MAX_NETWORK_OPERATION] = { |
253 |
|
[CCS_NETWORK_INET_TCP_PROTOCOL] = { |
254 |
|
[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_INET_TCP_BIND, |
255 |
|
[CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_INET_TCP_LISTEN, |
256 |
|
[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_INET_TCP_CONNECT, |
257 |
|
[CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_INET_TCP_ACCEPT, |
258 |
|
}, |
259 |
|
[CCS_NETWORK_INET_UDP_PROTOCOL] = { |
260 |
|
[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_INET_UDP_BIND, |
261 |
|
[CCS_NETWORK_SEND] = CCS_MAC_NETWORK_INET_UDP_SEND, |
262 |
|
[CCS_NETWORK_RECV] = CCS_MAC_NETWORK_INET_UDP_RECV, |
263 |
|
}, |
264 |
|
[CCS_NETWORK_INET_RAW_PROTOCOL] = { |
265 |
|
[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_INET_RAW_BIND, |
266 |
|
[CCS_NETWORK_SEND] = CCS_MAC_NETWORK_INET_RAW_SEND, |
267 |
|
[CCS_NETWORK_RECV] = CCS_MAC_NETWORK_INET_RAW_RECV, |
268 |
|
}, |
269 |
|
}; |
270 |
|
|
271 |
|
static const u8 |
272 |
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ccs_unix2mac[CCS_MAX_UNIX_PROTOCOL][CCS_MAX_NETWORK_OPERATION] = { |
273 |
|
[CCS_NETWORK_UNIX_STREAM_PROTOCOL] = { |
274 |
|
[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UNIX_STREAM_BIND, |
275 |
|
[CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_UNIX_STREAM_LISTEN, |
276 |
|
[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UNIX_STREAM_CONNECT, |
277 |
|
[CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT, |
278 |
|
}, |
279 |
|
[CCS_NETWORK_UNIX_DGRAM_PROTOCOL] = { |
280 |
|
[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UNIX_DGRAM_BIND, |
281 |
|
[CCS_NETWORK_SEND] = CCS_MAC_NETWORK_UNIX_DGRAM_SEND, |
282 |
|
[CCS_NETWORK_RECV] = CCS_MAC_NETWORK_UNIX_DGRAM_RECV, |
283 |
|
}, |
284 |
|
[CCS_NETWORK_UNIX_SEQPACKET_PROTOCOL] = { |
285 |
|
[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND, |
286 |
|
[CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN, |
287 |
|
[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT, |
288 |
|
[CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT, |
289 |
|
}, |
290 |
|
}; |
291 |
|
|
292 |
/** |
/** |
293 |
* ccs_network_entry2 - Check permission for network operation. |
* ccs_inet_entry - Check permission for INET network operation. |
294 |
* |
* |
295 |
* @is_ipv6: True if @address is an IPv6 address. |
* @address: Pointer to "struct ccs_addr_info". |
|
* @operation: Type of operation. |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
296 |
* |
* |
297 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
|
* |
|
|
* Caller holds ccs_read_lock(). |
|
298 |
*/ |
*/ |
299 |
static int ccs_network_entry2(const bool is_ipv6, const u8 operation, |
static int ccs_inet_entry(const struct ccs_addr_info *address) |
|
const u32 *address, const u16 port) |
|
300 |
{ |
{ |
301 |
|
const int idx = ccs_read_lock(); |
302 |
struct ccs_request_info r; |
struct ccs_request_info r; |
303 |
struct ccs_acl_info *ptr; |
int error = 0; |
304 |
const char *keyword = ccs_net2keyword(operation); |
const u8 type = ccs_inet2mac[address->protocol][address->operation]; |
305 |
const u16 perm = 1 << operation; |
if (type && ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) { |
306 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
struct task_struct * const task = current; |
307 |
const u32 ip = ntohl(*address); |
const bool no_sleep = address->operation == CCS_NETWORK_ACCEPT |
308 |
int error; |
|| address->operation == CCS_NETWORK_RECV; |
309 |
char buf[64]; |
r.param_type = CCS_TYPE_INET_ACL; |
310 |
ccs_assert_read_lock(); |
r.param.inet_network.protocol = address->protocol; |
311 |
if (ccs_init_request_info(&r, NULL, |
r.param.inet_network.operation = address->operation; |
312 |
CCS_MAC_NETWORK_UDP_BIND + operation) |
r.param.inet_network.is_ipv6 = address->inet.is_ipv6; |
313 |
== CCS_MAC_MODE_DISABLED) |
r.param.inet_network.address = address->inet.address; |
314 |
return 0; |
r.param.inet_network.port = ntohs(address->inet.port); |
315 |
memset(buf, 0, sizeof(buf)); |
/* use host byte order to allow u32 comparison than memcmp().*/ |
316 |
if (is_ipv6) |
r.param.inet_network.ip = ntohl(*address->inet.address); |
317 |
ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
if (no_sleep) |
318 |
address); |
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
319 |
else |
do { |
320 |
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
ccs_check_acl(&r, ccs_check_inet_acl); |
321 |
do { |
error = ccs_audit_inet_log(&r); |
322 |
error = -EPERM; |
} while (error == CCS_RETRY_REQUEST); |
323 |
list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
if (no_sleep) |
324 |
struct ccs_ip_network_acl *acl; |
task->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
325 |
if (ptr->is_deleted || |
} |
326 |
ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
ccs_read_unlock(idx); |
|
continue; |
|
|
acl = container_of(ptr, struct ccs_ip_network_acl, |
|
|
head); |
|
|
if (!(acl->perm & perm)) |
|
|
continue; |
|
|
if (!ccs_compare_number_union(port, &acl->port) || |
|
|
!ccs_condition(&r, ptr)) |
|
|
continue; |
|
|
switch (acl->address_type) { |
|
|
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
|
|
if (!ccs_address_matches_group(is_ipv6, |
|
|
address, |
|
|
acl->address. |
|
|
group)) |
|
|
continue; |
|
|
break; |
|
|
case CCS_IP_ADDRESS_TYPE_IPv4: |
|
|
if (is_ipv6 || ip < acl->address.ipv4.min || |
|
|
acl->address.ipv4.max < ip) |
|
|
continue; |
|
|
break; |
|
|
default: |
|
|
if (!is_ipv6 || |
|
|
memcmp(acl->address.ipv6.min, address, 16) |
|
|
> 0 || |
|
|
memcmp(address, acl->address.ipv6.max, 16) |
|
|
> 0) |
|
|
continue; |
|
|
break; |
|
|
} |
|
|
r.cond = ptr->cond; |
|
|
error = 0; |
|
|
break; |
|
|
} |
|
|
ccs_audit_network_log(&r, keyword, buf, port, !error); |
|
|
if (!error) |
|
|
break; |
|
|
error = ccs_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
|
|
"%s %s %u\n", keyword, buf, port); |
|
|
} while (error == 1); |
|
|
if (r.mode != CCS_MAC_MODE_ENFORCING) |
|
|
error = 0; |
|
327 |
return error; |
return error; |
328 |
} |
} |
329 |
|
|
330 |
/** |
/** |
331 |
* ccs_network_entry - Check permission for network operation. |
* ccs_unix_entry - Check permission for UNIX network operation. |
332 |
* |
* |
333 |
* @is_ipv6: True if @address is an IPv6 address. |
* @address: Pointer to "struct ccs_addr_info". |
|
* @operation: Type of operation. |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
334 |
* |
* |
335 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
336 |
*/ |
*/ |
337 |
static int ccs_network_entry(const bool is_ipv6, const u8 operation, |
static int ccs_unix_entry(const struct ccs_addr_info *address) |
|
const u32 *address, const u16 port) |
|
338 |
{ |
{ |
339 |
const int idx = ccs_read_lock(); |
const int idx = ccs_read_lock(); |
340 |
const int error = ccs_network_entry2(is_ipv6, operation, |
struct ccs_request_info r; |
341 |
address, port); |
int error = 0; |
342 |
|
const u8 type = ccs_unix2mac[address->protocol][address->operation]; |
343 |
|
if (type && address->unix0.addr_len > sizeof(sa_family_t) && |
344 |
|
ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) { |
345 |
|
char *buf; |
346 |
|
if (address->unix0.addr[0]) |
347 |
|
buf = ccs_encode(address->unix0.addr); |
348 |
|
else |
349 |
|
buf = ccs_encode2(address->unix0.addr, |
350 |
|
address->unix0.addr_len |
351 |
|
- sizeof(sa_family_t)); |
352 |
|
if (buf) { |
353 |
|
struct task_struct * const task = current; |
354 |
|
const bool no_sleep = |
355 |
|
address->operation == CCS_NETWORK_ACCEPT || |
356 |
|
address->operation == CCS_NETWORK_RECV; |
357 |
|
struct ccs_path_info addr; |
358 |
|
addr.name = buf; |
359 |
|
ccs_fill_path_info(&addr); |
360 |
|
r.param_type = CCS_TYPE_UNIX_ACL; |
361 |
|
r.param.unix_network.protocol = address->protocol; |
362 |
|
r.param.unix_network.operation = address->operation; |
363 |
|
r.param.unix_network.address = &addr; |
364 |
|
if (no_sleep) |
365 |
|
task->ccs_flags |= |
366 |
|
CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
367 |
|
|
368 |
|
do { |
369 |
|
ccs_check_acl(&r, ccs_check_unix_acl); |
370 |
|
error = ccs_audit_unix_log(&r); |
371 |
|
} while (error == CCS_RETRY_REQUEST); |
372 |
|
if (no_sleep) |
373 |
|
task->ccs_flags &= |
374 |
|
~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
375 |
|
kfree(buf); |
376 |
|
} else |
377 |
|
error = -ENOMEM; |
378 |
|
} |
379 |
ccs_read_unlock(idx); |
ccs_read_unlock(idx); |
380 |
return error; |
return error; |
381 |
} |
} |
382 |
|
|
383 |
|
static bool ccs_same_inet_acl(const struct ccs_acl_info *a, |
384 |
|
const struct ccs_acl_info *b) |
385 |
|
{ |
386 |
|
const struct ccs_inet_acl *p1 = container_of(a, typeof(*p1), head); |
387 |
|
const struct ccs_inet_acl *p2 = container_of(b, typeof(*p2), head); |
388 |
|
return ccs_same_acl_head(&p1->head, &p2->head) |
389 |
|
&& p1->protocol == p2->protocol |
390 |
|
&& p1->address_type == p2->address_type && |
391 |
|
p1->address.ipv4.min == p2->address.ipv4.min && |
392 |
|
p1->address.ipv6.min == p2->address.ipv6.min && |
393 |
|
p1->address.ipv4.max == p2->address.ipv4.max && |
394 |
|
p1->address.ipv6.max == p2->address.ipv6.max && |
395 |
|
p1->address.group == p2->address.group && |
396 |
|
ccs_same_number_union(&p1->port, &p2->port); |
397 |
|
} |
398 |
|
|
399 |
|
static bool ccs_same_unix_acl(const struct ccs_acl_info *a, |
400 |
|
const struct ccs_acl_info *b) |
401 |
|
{ |
402 |
|
const struct ccs_unix_acl *p1 = container_of(a, typeof(*p1), head); |
403 |
|
const struct ccs_unix_acl *p2 = container_of(b, typeof(*p2), head); |
404 |
|
return ccs_same_acl_head(&p1->head, &p2->head) && |
405 |
|
p1->protocol == p2->protocol && |
406 |
|
ccs_same_name_union(&p1->name, &p2->name); |
407 |
|
} |
408 |
|
|
409 |
|
static bool ccs_merge_inet_acl(struct ccs_acl_info *a, struct ccs_acl_info *b, |
410 |
|
const bool is_delete) |
411 |
|
{ |
412 |
|
u8 * const a_perm = &container_of(a, struct ccs_inet_acl, head)->perm; |
413 |
|
u8 perm = *a_perm; |
414 |
|
const u8 b_perm = container_of(b, struct ccs_inet_acl, head)->perm; |
415 |
|
if (is_delete) |
416 |
|
perm &= ~b_perm; |
417 |
|
else |
418 |
|
perm |= b_perm; |
419 |
|
*a_perm = perm; |
420 |
|
return !perm; |
421 |
|
} |
422 |
|
|
423 |
|
static bool ccs_merge_unix_acl(struct ccs_acl_info *a, struct ccs_acl_info *b, |
424 |
|
const bool is_delete) |
425 |
|
{ |
426 |
|
u8 * const a_perm = &container_of(a, struct ccs_unix_acl, head)->perm; |
427 |
|
u8 perm = *a_perm; |
428 |
|
const u8 b_perm = container_of(b, struct ccs_unix_acl, head)->perm; |
429 |
|
if (is_delete) |
430 |
|
perm &= ~b_perm; |
431 |
|
else |
432 |
|
perm |= b_perm; |
433 |
|
*a_perm = perm; |
434 |
|
return !perm; |
435 |
|
} |
436 |
|
|
437 |
/** |
/** |
438 |
* ccs_write_network_policy - Write "struct ccs_ip_network_acl" list. |
* ccs_write_inet_network - Write "struct ccs_inet_acl" list. |
439 |
* |
* |
440 |
* @data: String to parse. |
* @data: String to parse. |
441 |
* @domain: Pointer to "struct ccs_domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
442 |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
* @condition: Pointer to "struct ccs_condition". Maybe NULL. |
443 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
444 |
* |
* |
445 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
446 |
*/ |
*/ |
447 |
int ccs_write_network_policy(char *data, struct ccs_domain_info *domain, |
int ccs_write_inet_network(char *data, struct ccs_domain_info *domain, |
448 |
struct ccs_condition *condition, |
struct ccs_condition *condition, |
449 |
const bool is_delete) |
const bool is_delete) |
450 |
{ |
{ |
451 |
struct ccs_ip_network_acl *entry = NULL; |
struct ccs_inet_acl e = { |
452 |
struct ccs_acl_info *ptr; |
.head.type = CCS_TYPE_INET_ACL, |
|
struct ccs_ip_network_acl e = { |
|
|
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
|
453 |
.head.cond = condition, |
.head.cond = condition, |
454 |
}; |
}; |
455 |
u16 min_address[8]; |
u16 min_address[8]; |
456 |
u16 max_address[8]; |
u16 max_address[8]; |
457 |
int error = is_delete ? -ENOENT : -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
458 |
u8 sock_type; |
u8 type; |
459 |
char *w[4]; |
char *w[4]; |
460 |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
461 |
return -EINVAL; |
return -EINVAL; |
462 |
if (!strcmp(w[0], "TCP")) |
for (e.protocol = 0; e.protocol < CCS_MAX_INET_PROTOCOL; e.protocol++) |
463 |
sock_type = SOCK_STREAM; |
if (!strcmp(w[0], ccs_inet_keyword[e.protocol])) |
|
else if (!strcmp(w[0], "UDP")) |
|
|
sock_type = SOCK_DGRAM; |
|
|
else if (!strcmp(w[0], "RAW")) |
|
|
sock_type = SOCK_RAW; |
|
|
else |
|
|
return -EINVAL; |
|
|
if (!strcmp(w[1], "bind")) |
|
|
switch (sock_type) { |
|
|
case SOCK_STREAM: |
|
|
e.perm = 1 << CCS_NETWORK_TCP_BIND; |
|
|
break; |
|
|
case SOCK_DGRAM: |
|
|
e.perm = 1 << CCS_NETWORK_UDP_BIND; |
|
|
break; |
|
|
default: |
|
|
e.perm = 1 << CCS_NETWORK_RAW_BIND; |
|
|
break; |
|
|
} |
|
|
else if (!strcmp(w[1], "connect")) |
|
|
switch (sock_type) { |
|
|
case SOCK_STREAM: |
|
|
e.perm = 1 << CCS_NETWORK_TCP_CONNECT; |
|
|
break; |
|
|
case SOCK_DGRAM: |
|
|
e.perm = 1 << CCS_NETWORK_UDP_CONNECT; |
|
|
break; |
|
|
default: |
|
|
e.perm = 1 << CCS_NETWORK_RAW_CONNECT; |
|
464 |
break; |
break; |
465 |
} |
for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++) |
466 |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "listen")) |
if (ccs_permstr(w[1], ccs_net_keyword[type])) |
467 |
e.perm = 1 << CCS_NETWORK_TCP_LISTEN; |
e.perm |= 1 << type; |
468 |
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "accept")) |
if (e.protocol == CCS_MAX_INET_PROTOCOL || !e.perm) |
|
e.perm = 1 << CCS_NETWORK_TCP_ACCEPT; |
|
|
else |
|
469 |
return -EINVAL; |
return -EINVAL; |
470 |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
471 |
case 2: |
case CCS_IP_ADDRESS_TYPE_IPv6: |
472 |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
473 |
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
474 |
min_address); |
min_address); |
475 |
e.address.ipv6.max = ccs_get_ipv6_address((struct in6_addr *) |
e.address.ipv6.max = ccs_get_ipv6_address((struct in6_addr *) |
476 |
max_address); |
max_address); |
477 |
if (!e.address.ipv6.min || !e.address.ipv6.max) |
if (!e.address.ipv6.min || !e.address.ipv6.max) |
478 |
goto out; |
goto out; |
479 |
break; |
break; |
480 |
case 1: |
case CCS_IP_ADDRESS_TYPE_IPv4: |
481 |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
482 |
/* use host byte order to allow u32 comparison.*/ |
/* use host byte order to allow u32 comparison.*/ |
483 |
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
487 |
if (w[2][0] != '@') |
if (w[2][0] != '@') |
488 |
return -EINVAL; |
return -EINVAL; |
489 |
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
490 |
e.address.group = ccs_get_address_group(w[2] + 1); |
e.address.group = ccs_get_group(w[2] + 1, CCS_ADDRESS_GROUP); |
491 |
if (!e.address.group) |
if (!e.address.group) |
492 |
return -ENOMEM; |
return -ENOMEM; |
493 |
break; |
break; |
494 |
} |
} |
495 |
if (!ccs_parse_number_union(w[3], &e.port)) |
if (!ccs_parse_number_union(w[3], &e.port)) |
496 |
goto out; |
goto out; |
497 |
if (!is_delete) |
error = ccs_update_domain(&e.head, sizeof(e), is_delete, domain, |
498 |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
ccs_same_inet_acl, ccs_merge_inet_acl); |
|
mutex_lock(&ccs_policy_lock); |
|
|
list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) { |
|
|
struct ccs_ip_network_acl *acl = |
|
|
container_of(ptr, struct ccs_ip_network_acl, |
|
|
head); |
|
|
if (ptr->type != CCS_TYPE_IP_NETWORK_ACL || |
|
|
ptr->cond != condition || |
|
|
ccs_memcmp(acl, &e, offsetof(typeof(e), address_type), |
|
|
sizeof(e))) |
|
|
continue; |
|
|
if (is_delete) { |
|
|
acl->perm &= ~e.perm; |
|
|
if (!acl->perm) |
|
|
ptr->is_deleted = true; |
|
|
} else { |
|
|
if (ptr->is_deleted) |
|
|
acl->perm = 0; |
|
|
acl->perm |= e.perm; |
|
|
ptr->is_deleted = false; |
|
|
} |
|
|
error = 0; |
|
|
break; |
|
|
} |
|
|
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
|
|
ccs_add_domain_acl(domain, &entry->head); |
|
|
entry = NULL; |
|
|
error = 0; |
|
|
} |
|
|
mutex_unlock(&ccs_policy_lock); |
|
499 |
out: |
out: |
500 |
if (w[2][0] == '@') |
if (e.address_type == CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP) |
501 |
ccs_put_address_group(e.address.group); |
ccs_put_group(e.address.group); |
502 |
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
503 |
ccs_put_ipv6_address(e.address.ipv6.min); |
ccs_put_ipv6_address(e.address.ipv6.min); |
504 |
ccs_put_ipv6_address(e.address.ipv6.max); |
ccs_put_ipv6_address(e.address.ipv6.max); |
505 |
} |
} |
506 |
ccs_put_number_union(&e.port); |
ccs_put_number_union(&e.port); |
|
kfree(entry); |
|
507 |
return error; |
return error; |
508 |
} |
} |
509 |
|
|
510 |
/** |
/** |
511 |
* ccs_network_listen_acl - Check permission for listen() operation. |
* ccs_write_unix_network - Write "struct ccs_unix_acl" list. |
512 |
* |
* |
513 |
* @is_ipv6: True if @address is an IPv6 address. |
* @data: String to parse. |
514 |
* @address: An IPv4 or IPv6 address. |
* @domain: Pointer to "struct ccs_domain_info". |
515 |
* @port: Port number. |
* @condition: Pointer to "struct ccs_condition". Maybe NULL. |
516 |
|
* @is_delete: True if it is a delete request. |
517 |
* |
* |
518 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
519 |
*/ |
*/ |
520 |
static inline int ccs_network_listen_acl(const bool is_ipv6, |
int ccs_write_unix_network(char *data, struct ccs_domain_info *domain, |
521 |
const u8 *address, |
struct ccs_condition *condition, |
522 |
const u16 port) |
const bool is_delete) |
523 |
{ |
{ |
524 |
return ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
struct ccs_unix_acl e = { |
525 |
(const u32 *) address, ntohs(port)); |
.head.type = CCS_TYPE_UNIX_ACL, |
526 |
|
.head.cond = condition, |
527 |
|
}; |
528 |
|
int error = is_delete ? -ENOENT : -ENOMEM; |
529 |
|
u8 type; |
530 |
|
char *w[3]; |
531 |
|
if (!ccs_tokenize(data, w, sizeof(w)) || !w[2][0]) |
532 |
|
return -EINVAL; |
533 |
|
for (e.protocol = 0; e.protocol < CCS_MAX_UNIX_PROTOCOL; e.protocol++) |
534 |
|
if (!strcmp(w[0], ccs_unix_keyword[e.protocol])) |
535 |
|
break; |
536 |
|
for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++) |
537 |
|
if (ccs_permstr(w[1], ccs_net_keyword[type])) |
538 |
|
e.perm |= 1 << type; |
539 |
|
if (e.protocol == CCS_MAX_UNIX_PROTOCOL || !e.perm) |
540 |
|
return -EINVAL; |
541 |
|
if (!ccs_parse_name_union(w[2], &e.name)) |
542 |
|
return -EINVAL; |
543 |
|
error = ccs_update_domain(&e.head, sizeof(e), is_delete, domain, |
544 |
|
ccs_same_unix_acl, ccs_merge_unix_acl); |
545 |
|
ccs_put_name_union(&e.name); |
546 |
|
return error; |
547 |
} |
} |
548 |
|
|
549 |
/** |
#ifndef CONFIG_NET |
550 |
* ccs_network_connect_acl - Check permission for connect() operation. |
|
551 |
* |
void __init ccs_network_init(void) |
|
* @is_ipv6: True if @address is an IPv6 address. |
|
|
* @sock_type: Type of socket. (TCP or UDP or RAW) |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static inline int ccs_network_connect_acl(const bool is_ipv6, |
|
|
const int sock_type, |
|
|
const u8 *address, |
|
|
const u16 port) |
|
552 |
{ |
{ |
|
u8 operation; |
|
|
switch (sock_type) { |
|
|
case SOCK_STREAM: |
|
|
operation = CCS_NETWORK_TCP_CONNECT; |
|
|
break; |
|
|
case SOCK_DGRAM: |
|
|
operation = CCS_NETWORK_UDP_CONNECT; |
|
|
break; |
|
|
default: |
|
|
operation = CCS_NETWORK_RAW_CONNECT; |
|
|
} |
|
|
return ccs_network_entry(is_ipv6, operation, |
|
|
(const u32 *) address, ntohs(port)); |
|
553 |
} |
} |
554 |
|
|
555 |
/** |
#else |
556 |
* ccs_network_bind_acl - Check permission for bind() operation. |
|
557 |
* |
static int ccs_check_inet_address(const struct sockaddr *addr, |
558 |
* @is_ipv6: True if @address is an IPv6 address. |
const unsigned int addr_len, const u16 port, |
559 |
* @sock_type: Type of socket. (TCP or UDP or RAW) |
struct ccs_addr_info *address) |
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int ccs_network_bind_acl(const bool is_ipv6, const int sock_type, |
|
|
const u8 *address, const u16 port) |
|
560 |
{ |
{ |
561 |
u8 operation; |
struct ccs_inet_addr_info *i = &address->inet; |
562 |
switch (sock_type) { |
switch (addr->sa_family) { |
563 |
case SOCK_STREAM: |
case AF_INET6: |
564 |
operation = CCS_NETWORK_TCP_BIND; |
if (addr_len < SIN6_LEN_RFC2133) |
565 |
|
goto skip; |
566 |
|
i->is_ipv6 = true; |
567 |
|
i->address = (u32 *) |
568 |
|
((struct sockaddr_in6 *) addr)->sin6_addr.s6_addr; |
569 |
|
i->port = ((struct sockaddr_in6 *) addr)->sin6_port; |
570 |
break; |
break; |
571 |
case SOCK_DGRAM: |
case AF_INET: |
572 |
operation = CCS_NETWORK_UDP_BIND; |
if (addr_len < sizeof(struct sockaddr_in)) |
573 |
|
goto skip; |
574 |
|
i->is_ipv6 = false; |
575 |
|
i->address = (u32 *) &((struct sockaddr_in *) addr)->sin_addr; |
576 |
|
i->port = ((struct sockaddr_in *) addr)->sin_port; |
577 |
break; |
break; |
578 |
default: |
default: |
579 |
operation = CCS_NETWORK_RAW_BIND; |
goto skip; |
580 |
} |
} |
581 |
return ccs_network_entry(is_ipv6, operation, |
if (address->protocol == CCS_NETWORK_INET_RAW_PROTOCOL) |
582 |
(const u32 *) address, ntohs(port)); |
i->port = htons(port); |
583 |
|
return ccs_inet_entry(address); |
584 |
|
skip: |
585 |
|
return 0; |
586 |
} |
} |
587 |
|
|
588 |
/** |
static int ccs_unix_entry(const struct ccs_addr_info *address); |
|
* ccs_network_accept_acl - Check permission for accept() operation. |
|
|
* |
|
|
* @is_ipv6: True if @address is an IPv6 address. |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static inline int ccs_network_accept_acl(const bool is_ipv6, |
|
|
const u8 *address, |
|
|
const u16 port) |
|
|
{ |
|
|
int retval; |
|
|
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
|
retval = ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_ACCEPT, |
|
|
(const u32 *) address, ntohs(port)); |
|
|
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
|
return retval; |
|
|
} |
|
589 |
|
|
590 |
/** |
static int ccs_check_unix_address(struct sockaddr *addr, |
591 |
* ccs_network_sendmsg_acl - Check permission for sendmsg() operation. |
const unsigned int addr_len, |
592 |
* |
struct ccs_addr_info *address) |
|
* @is_ipv6: True if @address is an IPv6 address. |
|
|
* @sock_type: Type of socket. (UDP or RAW) |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static inline int ccs_network_sendmsg_acl(const bool is_ipv6, |
|
|
const int sock_type, |
|
|
const u8 *address, |
|
|
const u16 port) |
|
593 |
{ |
{ |
594 |
u8 operation; |
struct ccs_unix_addr_info *u = &address->unix0; |
595 |
if (sock_type == SOCK_DGRAM) |
if (addr->sa_family != AF_UNIX) |
596 |
operation = CCS_NETWORK_UDP_CONNECT; |
return 0; |
597 |
else |
u->addr = ((struct sockaddr_un *) addr)->sun_path; |
598 |
operation = CCS_NETWORK_RAW_CONNECT; |
u->addr_len = addr_len; |
599 |
return ccs_network_entry(is_ipv6, operation, |
/* |
600 |
(const u32 *) address, ntohs(port)); |
* Terminate pathname with '\0' like unix_mkname() does. |
601 |
|
* This is needed because pathname was copied by move_addr_to_kernel() |
602 |
|
* but not yet terminated by unix_mkname(). |
603 |
|
*/ |
604 |
|
if (u->addr[0] && addr_len > sizeof(short) && |
605 |
|
addr_len <= sizeof(struct sockaddr_un)) |
606 |
|
((char *) u->addr)[addr_len] = '\0'; |
607 |
|
return ccs_unix_entry(address); |
608 |
} |
} |
609 |
|
|
610 |
/** |
static bool ccs_kernel_service(void) |
611 |
* ccs_network_recvmsg_acl - Check permission for recvmsg() operation. |
{ |
612 |
* |
/* Nothing to do if I am a kernel service. */ |
613 |
* @is_ipv6: True if @address is an IPv6 address. |
return segment_eq(get_fs(), KERNEL_DS); |
|
* @sock_type: Type of socket. (UDP or RAW) |
|
|
* @address: An IPv4 or IPv6 address. |
|
|
* @port: Port number. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static inline int ccs_network_recvmsg_acl(const bool is_ipv6, |
|
|
const int sock_type, |
|
|
const u8 *address, |
|
|
const u16 port) |
|
|
{ |
|
|
int retval; |
|
|
const u8 operation |
|
|
= (sock_type == SOCK_DGRAM) ? |
|
|
CCS_NETWORK_UDP_CONNECT : CCS_NETWORK_RAW_CONNECT; |
|
|
current->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
|
retval = ccs_network_entry(is_ipv6, operation, |
|
|
(const u32 *) address, ntohs(port)); |
|
|
current->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
|
return retval; |
|
614 |
} |
} |
615 |
|
|
616 |
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
static u8 ccs_sock_family(struct sock *sk) |
617 |
|
{ |
618 |
|
if (ccs_kernel_service()) |
619 |
|
return 0; |
620 |
|
switch (sk->sk_family) { |
621 |
|
case PF_INET: |
622 |
|
case PF_INET6: |
623 |
|
return 1; |
624 |
|
case PF_UNIX: |
625 |
|
return 2; |
626 |
|
default: |
627 |
|
return 0; |
628 |
|
} |
629 |
|
} |
630 |
|
|
631 |
/* Check permission for creating a socket. */ |
/* Check permission for creating a socket. */ |
632 |
int ccs_socket_create_permission(int family, int type, int protocol) |
static int __ccs_socket_create_permission(int family, int type, int protocol) |
633 |
{ |
{ |
634 |
int error = 0; |
if (ccs_kernel_service()) |
|
/* Nothing to do if I am a kernel service. */ |
|
|
if (segment_eq(get_fs(), KERNEL_DS)) |
|
635 |
return 0; |
return 0; |
636 |
if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET)) |
if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET)) |
637 |
return -EPERM; |
return -EPERM; |
638 |
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
639 |
return -EPERM; |
return -EPERM; |
640 |
if (family != PF_INET && family != PF_INET6) |
return 0; |
|
return 0; |
|
|
switch (type) { |
|
|
case SOCK_STREAM: |
|
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CREATE)) |
|
|
error = -EPERM; |
|
|
break; |
|
|
case SOCK_DGRAM: |
|
|
if (!ccs_capable(CCS_USE_INET_DGRAM_SOCKET)) |
|
|
error = -EPERM; |
|
|
break; |
|
|
case SOCK_RAW: |
|
|
if (!ccs_capable(CCS_USE_INET_RAW_SOCKET)) |
|
|
error = -EPERM; |
|
|
break; |
|
|
} |
|
|
return error; |
|
641 |
} |
} |
642 |
|
|
643 |
/* Check permission for listening a TCP socket. */ |
/* Check permission for listening a socket. */ |
644 |
int ccs_socket_listen_permission(struct socket *sock) |
static int __ccs_socket_listen_permission(struct socket *sock) |
645 |
{ |
{ |
646 |
int error = 0; |
struct ccs_addr_info address; |
647 |
char addr[MAX_SOCK_ADDR]; |
const u8 family = ccs_sock_family(sock->sk); |
648 |
|
const unsigned int type = sock->type; |
649 |
|
struct sockaddr_storage addr; |
650 |
int addr_len; |
int addr_len; |
651 |
/* Nothing to do if I am a kernel service. */ |
if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET)) |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
|
|
return 0; |
|
|
if (sock->type != SOCK_STREAM) |
|
|
return 0; |
|
|
switch (sock->sk->sk_family) { |
|
|
case PF_INET: |
|
|
case PF_INET6: |
|
|
break; |
|
|
default: |
|
652 |
return 0; |
return 0; |
653 |
|
{ |
654 |
|
const int error = sock->ops->getname(sock, (struct sockaddr *) |
655 |
|
&addr, &addr_len, 0); |
656 |
|
if (error) |
657 |
|
return error; |
658 |
|
} |
659 |
|
address.operation = CCS_NETWORK_LISTEN; |
660 |
|
if (family == 2) { |
661 |
|
if (type == SOCK_STREAM) |
662 |
|
address.protocol = CCS_NETWORK_UNIX_STREAM_PROTOCOL; |
663 |
|
else |
664 |
|
address.protocol = CCS_NETWORK_UNIX_SEQPACKET_PROTOCOL; |
665 |
|
return ccs_check_unix_address((struct sockaddr *) &addr, |
666 |
|
addr_len, &address); |
667 |
} |
} |
668 |
if (!ccs_capable(CCS_INET_STREAM_SOCKET_LISTEN)) |
address.protocol = CCS_NETWORK_INET_TCP_PROTOCOL; |
669 |
return -EPERM; |
return ccs_check_inet_address((struct sockaddr *) &addr, addr_len, 0, |
670 |
if (sock->ops->getname(sock, (struct sockaddr *) addr, &addr_len, 0)) |
&address); |
|
return -EPERM; |
|
|
switch (((struct sockaddr *) addr)->sa_family) { |
|
|
struct sockaddr_in6 *addr6; |
|
|
struct sockaddr_in *addr4; |
|
|
case AF_INET6: |
|
|
addr6 = (struct sockaddr_in6 *) addr; |
|
|
error = ccs_network_listen_acl(true, |
|
|
addr6->sin6_addr.s6_addr, |
|
|
addr6->sin6_port); |
|
|
break; |
|
|
case AF_INET: |
|
|
addr4 = (struct sockaddr_in *) addr; |
|
|
error = ccs_network_listen_acl(false, |
|
|
(u8 *) &addr4->sin_addr, |
|
|
addr4->sin_port); |
|
|
break; |
|
|
} |
|
|
return error; |
|
671 |
} |
} |
672 |
|
|
673 |
/* Check permission for setting the remote IP address/port pair of a socket. */ |
/* Check permission for setting the remote address of a socket. */ |
674 |
int ccs_socket_connect_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_connect_permission(struct socket *sock, |
675 |
int addr_len) |
struct sockaddr *addr, int addr_len) |
676 |
{ |
{ |
677 |
int error = 0; |
struct ccs_addr_info address; |
678 |
|
const u8 family = ccs_sock_family(sock->sk); |
679 |
const unsigned int type = sock->type; |
const unsigned int type = sock->type; |
680 |
/* Nothing to do if I am a kernel service. */ |
if (!family) |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
|
681 |
return 0; |
return 0; |
682 |
|
address.operation = CCS_NETWORK_CONNECT; |
683 |
|
if (family == 2) { |
684 |
|
switch (type) { |
685 |
|
case SOCK_STREAM: |
686 |
|
address.protocol = CCS_NETWORK_UNIX_STREAM_PROTOCOL; |
687 |
|
break; |
688 |
|
case SOCK_DGRAM: |
689 |
|
address.protocol = CCS_NETWORK_UNIX_DGRAM_PROTOCOL; |
690 |
|
address.operation = CCS_NETWORK_SEND; |
691 |
|
break; |
692 |
|
case SOCK_SEQPACKET: |
693 |
|
address.protocol = CCS_NETWORK_UNIX_SEQPACKET_PROTOCOL; |
694 |
|
break; |
695 |
|
default: |
696 |
|
return 0; |
697 |
|
} |
698 |
|
return ccs_check_unix_address(addr, addr_len, &address); |
699 |
|
} |
700 |
switch (type) { |
switch (type) { |
701 |
case SOCK_STREAM: |
case SOCK_STREAM: |
702 |
|
address.protocol = CCS_NETWORK_INET_TCP_PROTOCOL; |
703 |
|
break; |
704 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
705 |
|
address.protocol = CCS_NETWORK_INET_UDP_PROTOCOL; |
706 |
|
address.operation = CCS_NETWORK_SEND; |
707 |
|
break; |
708 |
case SOCK_RAW: |
case SOCK_RAW: |
709 |
|
address.protocol = CCS_NETWORK_INET_RAW_PROTOCOL; |
710 |
|
address.operation = CCS_NETWORK_SEND; |
711 |
break; |
break; |
712 |
default: |
default: |
713 |
return 0; |
return 0; |
714 |
} |
} |
715 |
switch (addr->sa_family) { |
return ccs_check_inet_address(addr, addr_len, sock->sk->sk_protocol, |
716 |
struct sockaddr_in6 *addr6; |
&address); |
|
struct sockaddr_in *addr4; |
|
|
u16 port; |
|
|
case AF_INET6: |
|
|
if (addr_len < SIN6_LEN_RFC2133) |
|
|
break; |
|
|
addr6 = (struct sockaddr_in6 *) addr; |
|
|
if (type != SOCK_RAW) |
|
|
port = addr6->sin6_port; |
|
|
else |
|
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_connect_acl(true, type, |
|
|
addr6->sin6_addr.s6_addr, |
|
|
port); |
|
|
break; |
|
|
case AF_INET: |
|
|
if (addr_len < sizeof(struct sockaddr_in)) |
|
|
break; |
|
|
addr4 = (struct sockaddr_in *) addr; |
|
|
if (type != SOCK_RAW) |
|
|
port = addr4->sin_port; |
|
|
else |
|
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_connect_acl(false, type, |
|
|
(u8 *) &addr4->sin_addr, |
|
|
port); |
|
|
break; |
|
|
} |
|
|
if (type != SOCK_STREAM) |
|
|
return error; |
|
|
switch (sock->sk->sk_family) { |
|
|
case PF_INET: |
|
|
case PF_INET6: |
|
|
if (!ccs_capable(CCS_INET_STREAM_SOCKET_CONNECT)) |
|
|
error = -EPERM; |
|
|
break; |
|
|
} |
|
|
return error; |
|
717 |
} |
} |
718 |
|
|
719 |
/* Check permission for setting the local IP address/port pair of a socket. */ |
/* Check permission for setting the local address of a socket. */ |
720 |
int ccs_socket_bind_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_bind_permission(struct socket *sock, |
721 |
int addr_len) |
struct sockaddr *addr, int addr_len) |
722 |
{ |
{ |
723 |
int error = 0; |
struct ccs_addr_info address; |
724 |
|
const u8 family = ccs_sock_family(sock->sk); |
725 |
const unsigned int type = sock->type; |
const unsigned int type = sock->type; |
726 |
/* Nothing to do if I am a kernel service. */ |
if (!family) |
|
if (segment_eq(get_fs(), KERNEL_DS)) |
|
727 |
return 0; |
return 0; |
728 |
|
address.operation = CCS_NETWORK_BIND; |
729 |
|
if (family == 2) { |
730 |
|
switch (type) { |
731 |
|
case SOCK_STREAM: |
732 |
|
address.protocol = CCS_NETWORK_UNIX_STREAM_PROTOCOL; |
733 |
|
break; |
734 |
|
case SOCK_DGRAM: |
735 |
|
address.protocol = CCS_NETWORK_UNIX_DGRAM_PROTOCOL; |
736 |
|
break; |
737 |
|
case SOCK_SEQPACKET: |
738 |
|
address.protocol = CCS_NETWORK_UNIX_SEQPACKET_PROTOCOL; |
739 |
|
break; |
740 |
|
default: |
741 |
|
return 0; |
742 |
|
} |
743 |
|
return ccs_check_unix_address(addr, addr_len, &address); |
744 |
|
} |
745 |
switch (type) { |
switch (type) { |
746 |
case SOCK_STREAM: |
case SOCK_STREAM: |
747 |
|
address.protocol = CCS_NETWORK_INET_TCP_PROTOCOL; |
748 |
|
break; |
749 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
750 |
|
address.protocol = CCS_NETWORK_INET_UDP_PROTOCOL; |
751 |
|
break; |
752 |
case SOCK_RAW: |
case SOCK_RAW: |
753 |
|
address.protocol = CCS_NETWORK_INET_RAW_PROTOCOL; |
754 |
break; |
break; |
755 |
default: |
default: |
756 |
return 0; |
return 0; |
757 |
} |
} |
758 |
switch (addr->sa_family) { |
return ccs_check_inet_address(addr, addr_len, sock->sk->sk_protocol, |
759 |
struct sockaddr_in6 *addr6; |
&address); |
|
struct sockaddr_in *addr4; |
|
|
u16 port; |
|
|
case AF_INET6: |
|
|
if (addr_len < SIN6_LEN_RFC2133) |
|
|
break; |
|
|
addr6 = (struct sockaddr_in6 *) addr; |
|
|
if (type != SOCK_RAW) |
|
|
port = addr6->sin6_port; |
|
|
else |
|
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_bind_acl(true, type, |
|
|
addr6->sin6_addr.s6_addr, |
|
|
port); |
|
|
break; |
|
|
case AF_INET: |
|
|
if (addr_len < sizeof(struct sockaddr_in)) |
|
|
break; |
|
|
addr4 = (struct sockaddr_in *) addr; |
|
|
if (type != SOCK_RAW) |
|
|
port = addr4->sin_port; |
|
|
else |
|
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_bind_acl(false, type, |
|
|
(u8 *) &addr4->sin_addr, |
|
|
port); |
|
|
break; |
|
|
} |
|
|
return error; |
|
760 |
} |
} |
761 |
|
|
762 |
/* |
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
763 |
* Check permission for accepting a TCP socket. |
static int __ccs_socket_sendmsg_permission(struct socket *sock, |
764 |
* |
struct msghdr *msg, int size) |
|
* Currently, the LSM hook for this purpose is not provided. |
|
|
*/ |
|
|
int ccs_socket_accept_permission(struct socket *sock, struct sockaddr *addr) |
|
765 |
{ |
{ |
766 |
int error = 0; |
struct ccs_addr_info address; |
767 |
int addr_len; |
const u8 family = ccs_sock_family(sock->sk); |
768 |
/* Nothing to do if I am a kernel service. */ |
const unsigned int type = sock->type; |
769 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (!msg->msg_name || !family) |
|
return 0; |
|
|
switch (sock->sk->sk_family) { |
|
|
case PF_INET: |
|
|
case PF_INET6: |
|
|
break; |
|
|
default: |
|
770 |
return 0; |
return 0; |
771 |
|
address.operation = CCS_NETWORK_SEND; |
772 |
|
if (family == 2) { |
773 |
|
if (type != SOCK_DGRAM) |
774 |
|
return 0; |
775 |
|
address.protocol = CCS_NETWORK_UNIX_DGRAM_PROTOCOL; |
776 |
|
return ccs_check_unix_address((struct sockaddr *) |
777 |
|
msg->msg_name, msg->msg_namelen, |
778 |
|
&address); |
779 |
} |
} |
780 |
error = sock->ops->getname(sock, addr, &addr_len, 2); |
switch (type) { |
781 |
if (error) |
case SOCK_DGRAM: |
782 |
return error; |
address.protocol = CCS_NETWORK_INET_UDP_PROTOCOL; |
|
switch (addr->sa_family) { |
|
|
struct sockaddr_in6 *addr6; |
|
|
struct sockaddr_in *addr4; |
|
|
case AF_INET6: |
|
|
addr6 = (struct sockaddr_in6 *) addr; |
|
|
error = ccs_network_accept_acl(true, |
|
|
addr6->sin6_addr.s6_addr, |
|
|
addr6->sin6_port); |
|
783 |
break; |
break; |
784 |
case AF_INET: |
case SOCK_RAW: |
785 |
addr4 = (struct sockaddr_in *) addr; |
address.protocol = CCS_NETWORK_INET_RAW_PROTOCOL; |
|
error = ccs_network_accept_acl(false, |
|
|
(u8 *) &addr4->sin_addr, |
|
|
addr4->sin_port); |
|
786 |
break; |
break; |
787 |
|
default: |
788 |
|
return 0; |
789 |
} |
} |
790 |
return error; |
return ccs_check_inet_address((struct sockaddr *) msg->msg_name, |
791 |
|
msg->msg_namelen, sock->sk->sk_protocol, |
792 |
|
&address); |
793 |
} |
} |
794 |
|
|
795 |
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
/* Check permission for accepting a socket. */ |
796 |
int ccs_socket_sendmsg_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_post_accept_permission(struct socket *sock, |
797 |
int addr_len) |
struct socket *newsock) |
798 |
{ |
{ |
799 |
int error = 0; |
struct ccs_addr_info address; |
800 |
const int type = sock->type; |
const u8 family = ccs_sock_family(sock->sk); |
801 |
/* Nothing to do if I am a kernel service. */ |
const unsigned int type = sock->type; |
802 |
if (segment_eq(get_fs(), KERNEL_DS)) |
struct sockaddr_storage addr; |
803 |
return 0; |
int addr_len; |
804 |
if (!addr || (type != SOCK_DGRAM && type != SOCK_RAW)) |
if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET)) |
805 |
return 0; |
return 0; |
806 |
switch (addr->sa_family) { |
{ |
807 |
struct sockaddr_in6 *addr6; |
const int error = newsock->ops->getname(newsock, |
808 |
struct sockaddr_in *addr4; |
(struct sockaddr *) |
809 |
u16 port; |
&addr, &addr_len, 2); |
810 |
case AF_INET6: |
if (error) |
811 |
if (addr_len < SIN6_LEN_RFC2133) |
return error; |
812 |
break; |
} |
813 |
addr6 = (struct sockaddr_in6 *) addr; |
address.operation = CCS_NETWORK_ACCEPT; |
814 |
if (type == SOCK_DGRAM) |
if (family == 2) { |
815 |
port = addr6->sin6_port; |
if (type == SOCK_STREAM) |
816 |
else |
address.protocol = CCS_NETWORK_UNIX_STREAM_PROTOCOL; |
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_sendmsg_acl(true, type, |
|
|
addr6->sin6_addr.s6_addr, |
|
|
port); |
|
|
break; |
|
|
case AF_INET: |
|
|
if (addr_len < sizeof(struct sockaddr_in)) |
|
|
break; |
|
|
addr4 = (struct sockaddr_in *) addr; |
|
|
if (type == SOCK_DGRAM) |
|
|
port = addr4->sin_port; |
|
817 |
else |
else |
818 |
port = htons(sock->sk->sk_protocol); |
address.protocol = CCS_NETWORK_UNIX_SEQPACKET_PROTOCOL; |
819 |
error = ccs_network_sendmsg_acl(false, type, |
return ccs_check_unix_address((struct sockaddr *) &addr, |
820 |
(u8 *) &addr4->sin_addr, |
addr_len, &address); |
821 |
port); |
} |
822 |
break; |
address.protocol = CCS_NETWORK_INET_TCP_PROTOCOL; |
823 |
} |
return ccs_check_inet_address((struct sockaddr *) &addr, addr_len, 0, |
824 |
return error; |
&address); |
825 |
} |
} |
826 |
|
|
827 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
828 |
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
#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) |
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
832 |
{ |
{ |
845 |
|
|
846 |
#endif |
#endif |
847 |
#endif |
#endif |
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 12) |
|
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
|
|
unsigned int flags) |
|
|
{ |
|
|
/* Clear queue. */ |
|
|
if (flags & MSG_PEEK) { |
|
|
int clear = 0; |
|
|
spin_lock_irq(&sk->sk_receive_queue.lock); |
|
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
|
|
__skb_unlink(skb, &sk->sk_receive_queue); |
|
|
clear = 1; |
|
|
} |
|
|
spin_unlock_irq(&sk->sk_receive_queue.lock); |
|
|
if (clear) |
|
|
kfree_skb(skb); |
|
|
} |
|
|
skb_free_datagram(sk, skb); |
|
|
} |
|
|
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16) |
|
|
static void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, |
|
|
unsigned int flags) |
|
|
{ |
|
|
/* Clear queue. */ |
|
|
if (flags & MSG_PEEK) { |
|
|
int clear = 0; |
|
|
spin_lock_bh(&sk->sk_receive_queue.lock); |
|
|
if (skb == skb_peek(&sk->sk_receive_queue)) { |
|
|
__skb_unlink(skb, &sk->sk_receive_queue); |
|
|
clear = 1; |
|
|
} |
|
|
spin_unlock_bh(&sk->sk_receive_queue.lock); |
|
|
if (clear) |
|
|
kfree_skb(skb); |
|
|
} |
|
|
skb_free_datagram(sk, skb); |
|
|
} |
|
848 |
#endif |
#endif |
849 |
|
|
850 |
/* |
/* Check permission for receiving a datagram. */ |
851 |
* Check permission for receiving a datagram via a UDP or RAW socket. |
static int __ccs_socket_post_recvmsg_permission(struct sock *sk, |
852 |
* |
struct sk_buff *skb) |
|
* Currently, the LSM hook for this purpose is not provided. |
|
|
*/ |
|
|
int ccs_socket_recvmsg_permission(struct sock *sk, struct sk_buff *skb, |
|
|
const unsigned int flags) |
|
853 |
{ |
{ |
854 |
int error = 0; |
struct ccs_addr_info address; |
855 |
|
const u8 family = ccs_sock_family(sk); |
856 |
const unsigned int type = sk->sk_type; |
const unsigned int type = sk->sk_type; |
857 |
if (type != SOCK_DGRAM && type != SOCK_RAW) |
struct sockaddr_storage addr; |
858 |
return 0; |
if (!family) |
|
/* Nothing to do if I am a kernel service. */ |
|
|
if (segment_eq(get_fs(), KERNEL_DS)) |
|
859 |
return 0; |
return 0; |
860 |
|
switch (type) { |
861 |
switch (sk->sk_family) { |
case SOCK_DGRAM: |
862 |
struct in6_addr sin6; |
if (family == 2) |
863 |
struct in_addr sin4; |
address.protocol = CCS_NETWORK_UNIX_DGRAM_PROTOCOL; |
864 |
u16 port; |
else |
865 |
case PF_INET6: |
address.protocol = CCS_NETWORK_INET_UDP_PROTOCOL; |
|
if (type == SOCK_DGRAM) { /* UDP IPv6 */ |
|
|
if (skb->protocol == htons(ETH_P_IP)) { |
|
|
ipv6_addr_set(&sin6, 0, 0, htonl(0xffff), |
|
|
ip_hdr(skb)->saddr); |
|
|
} else { |
|
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
|
|
} |
|
|
port = udp_hdr(skb)->source; |
|
|
} else { /* RAW IPv6 */ |
|
|
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
|
|
port = htons(sk->sk_protocol); |
|
|
} |
|
|
error = ccs_network_recvmsg_acl(true, type, |
|
|
(u8 *) &sin6, port); |
|
866 |
break; |
break; |
867 |
case PF_INET: |
case SOCK_RAW: |
868 |
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
address.protocol = CCS_NETWORK_INET_RAW_PROTOCOL; |
|
sin4.s_addr = ip_hdr(skb)->saddr; |
|
|
port = udp_hdr(skb)->source; |
|
|
} else { /* RAW IPv4 */ |
|
|
sin4.s_addr = ip_hdr(skb)->saddr; |
|
|
port = htons(sk->sk_protocol); |
|
|
} |
|
|
error = ccs_network_recvmsg_acl(false, type, |
|
|
(u8 *) &sin4, port); |
|
869 |
break; |
break; |
870 |
} |
default: |
|
if (!error) |
|
871 |
return 0; |
return 0; |
872 |
/* |
} |
873 |
* Remove from queue if MSG_PEEK is used so that |
address.operation = CCS_NETWORK_RECV; |
874 |
* the head message from unwanted source in receive queue will not |
if (family == 2) { |
875 |
* prevent the caller from picking up next message from wanted source |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
876 |
* when the caller is using MSG_PEEK flag for picking up. |
struct unix_address *u = unix_sk(skb->sk)->addr; |
877 |
*/ |
#else |
878 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
struct unix_address *u = skb->sk->protinfo.af_unix.addr; |
|
if (type == SOCK_DGRAM) |
|
|
lock_sock(sk); |
|
|
#endif |
|
|
skb_kill_datagram(sk, skb, flags); |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
|
|
if (type == SOCK_DGRAM) |
|
|
release_sock(sk); |
|
879 |
#endif |
#endif |
880 |
/* Hope less harmful than -EPERM. */ |
unsigned int addr_len; |
881 |
return -ENOMEM; |
if (!u) |
882 |
|
return 0; |
883 |
|
addr_len = u->len; |
884 |
|
if (addr_len >= sizeof(addr)) |
885 |
|
return 0; |
886 |
|
memcpy(&addr, u->name, addr_len); |
887 |
|
return ccs_check_unix_address((struct sockaddr *) &addr, |
888 |
|
addr_len, &address); |
889 |
|
} else { |
890 |
|
struct in6_addr *sin6 = (struct in6_addr *) &addr; |
891 |
|
struct in_addr *sin4 = (struct in_addr *) &addr; |
892 |
|
switch (sk->sk_family) { |
893 |
|
case PF_INET6: |
894 |
|
address.inet.is_ipv6 = true; |
895 |
|
if (type == SOCK_DGRAM && |
896 |
|
skb->protocol == htons(ETH_P_IP)) |
897 |
|
ipv6_addr_set(sin6, 0, 0, htonl(0xffff), |
898 |
|
ip_hdr(skb)->saddr); |
899 |
|
else |
900 |
|
ipv6_addr_copy(sin6, &ipv6_hdr(skb)->saddr); |
901 |
|
break; |
902 |
|
case PF_INET: |
903 |
|
address.inet.is_ipv6 = false; |
904 |
|
sin4->s_addr = ip_hdr(skb)->saddr; |
905 |
|
break; |
906 |
|
default: |
907 |
|
return 0; |
908 |
|
} |
909 |
|
address.inet.address = (u32 *) &addr; |
910 |
|
if (type == SOCK_DGRAM) |
911 |
|
address.inet.port = udp_hdr(skb)->source; |
912 |
|
else |
913 |
|
address.inet.port = htons(sk->sk_protocol); |
914 |
|
return ccs_inet_entry(&address); |
915 |
|
} |
916 |
} |
} |
917 |
EXPORT_SYMBOL(ccs_socket_recvmsg_permission); |
|
918 |
|
void __init ccs_network_init(void) |
919 |
|
{ |
920 |
|
ccsecurity_ops.socket_create_permission = |
921 |
|
__ccs_socket_create_permission; |
922 |
|
ccsecurity_ops.socket_listen_permission = |
923 |
|
__ccs_socket_listen_permission; |
924 |
|
ccsecurity_ops.socket_connect_permission = |
925 |
|
__ccs_socket_connect_permission; |
926 |
|
ccsecurity_ops.socket_bind_permission = __ccs_socket_bind_permission; |
927 |
|
ccsecurity_ops.socket_post_accept_permission = |
928 |
|
__ccs_socket_post_accept_permission; |
929 |
|
ccsecurity_ops.socket_sendmsg_permission = |
930 |
|
__ccs_socket_sendmsg_permission; |
931 |
|
ccsecurity_ops.socket_post_recvmsg_permission = |
932 |
|
__ccs_socket_post_recvmsg_permission; |
933 |
|
} |
934 |
|
|
935 |
|
#endif |