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: 1.7.2+ 2010/07/21 |
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. |
19 |
#include <net/udp.h> |
#include <net/udp.h> |
20 |
#include "internal.h" |
#include "internal.h" |
21 |
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22 |
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struct ccs_addr_info { |
23 |
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u8 protocol; |
24 |
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u8 operation; |
25 |
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u16 port; /* In network byte order. */ |
26 |
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const u32 *address; /* In network byte order. */ |
27 |
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bool is_ipv6; |
28 |
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}; |
29 |
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30 |
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const char *ccs_net_protocol_keyword[CCS_MAX_NETWORK_PROTOCOL] = { |
31 |
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[CCS_NETWORK_TCP_PROTOCOL] = "TCP", |
32 |
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[CCS_NETWORK_UDP_PROTOCOL] = "UDP", |
33 |
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[CCS_NETWORK_RAW_PROTOCOL] = "RAW", |
34 |
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}; |
35 |
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36 |
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const char *ccs_net_keyword[CCS_MAX_NETWORK_OPERATION] = { |
37 |
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[CCS_NETWORK_BIND] = "bind", |
38 |
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[CCS_NETWORK_LISTEN] = "listen", |
39 |
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[CCS_NETWORK_CONNECT] = "connect", |
40 |
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[CCS_NETWORK_ACCEPT] = "accept", |
41 |
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[CCS_NETWORK_SEND] = "send", |
42 |
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[CCS_NETWORK_RECV] = "recv", |
43 |
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}; |
44 |
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|
45 |
/** |
/** |
46 |
* ccs_audit_network_log - Audit network log. |
* ccs_audit_network_log - Audit network log. |
47 |
* |
* |
48 |
* @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. |
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49 |
* |
* |
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* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
51 |
*/ |
*/ |
52 |
static int ccs_audit_network_log(struct ccs_request_info *r, |
static int ccs_audit_network_log(struct ccs_request_info *r) |
53 |
const char *operation, const char *address, |
{ |
54 |
const u16 port, const bool is_granted) |
char buf[128]; |
55 |
{ |
const char *protocol = |
56 |
if (!is_granted) |
ccs_net_protocol_keyword[r->param.network.protocol]; |
57 |
ccs_warn_log(r, "%s %s %u", operation, address, port); |
const char *operation = ccs_net_keyword[r->param.network.operation]; |
58 |
return ccs_write_audit_log(is_granted, r, CCS_KEYWORD_ALLOW_NETWORK |
const u32 *address = r->param.network.address; |
59 |
"%s %s %u\n", operation, address, port); |
const u16 port = r->param.network.port; |
60 |
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if (r->param.network.is_ipv6) |
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ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
62 |
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address, (const struct in6_addr *) address); |
63 |
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else |
64 |
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ccs_print_ipv4(buf, sizeof(buf), r->param.network.ip, |
65 |
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r->param.network.ip); |
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ccs_write_log(r, "network %s %s %s %u\n", protocol, operation, buf, |
67 |
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port); |
68 |
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if (r->granted) |
69 |
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return 0; |
70 |
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ccs_warn_log(r, "network %s %s %s %u", protocol, operation, buf, port); |
71 |
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return ccs_supervisor(r, "network %s %s %s %u\n", protocol, operation, |
72 |
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buf, port); |
73 |
} |
} |
74 |
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|
75 |
/** |
/** |
79 |
* @min: Pointer to store min address. |
* @min: Pointer to store min address. |
80 |
* @max: Pointer to store max address. |
* @max: Pointer to store max address. |
81 |
* |
* |
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* 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, |
83 |
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* CCS_IP_ADDRESS_TYPE_IPv4 if @address is an IPv4, |
84 |
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* CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP otherwise. |
85 |
*/ |
*/ |
86 |
int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
int ccs_parse_ip_address(char *address, u16 *min, u16 *max) |
87 |
{ |
{ |
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min[i] = htons(min[i]); |
min[i] = htons(min[i]); |
100 |
max[i] = htons(max[i]); |
max[i] = htons(max[i]); |
101 |
} |
} |
102 |
return 2; |
return CCS_IP_ADDRESS_TYPE_IPv6; |
103 |
} |
} |
104 |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
count = sscanf(address, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", |
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&min[0], &min[1], &min[2], &min[3], |
&min[0], &min[1], &min[2], &min[3], |
109 |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
+ (((u8) min[2]) << 8) + (u8) min[3]); |
110 |
memmove(min, &ip, sizeof(ip)); |
memmove(min, &ip, sizeof(ip)); |
111 |
if (count == 8) |
if (count == 8) |
112 |
ip = htonl((((u8) max[0]) << 24) + (((u8) max[1]) << 16) |
ip = htonl((((u8) max[0]) << 24) |
113 |
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+ (((u8) max[1]) << 16) |
114 |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
+ (((u8) max[2]) << 8) + (u8) max[3]); |
115 |
memmove(max, &ip, sizeof(ip)); |
memmove(max, &ip, sizeof(ip)); |
116 |
return 1; |
return CCS_IP_ADDRESS_TYPE_IPv4; |
117 |
} |
} |
118 |
return 0; |
return CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
119 |
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} |
120 |
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|
121 |
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/** |
122 |
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* ccs_print_ipv4 - Print an IPv4 address. |
123 |
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* |
124 |
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* @buffer: Buffer to write to. |
125 |
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* @buffer_len: Size of @buffer. |
126 |
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* @min_ip: Min address in host byte order. |
127 |
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* @max_ip: Max address in host byte order. |
128 |
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* |
129 |
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* Returns nothing. |
130 |
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*/ |
131 |
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void ccs_print_ipv4(char *buffer, const int buffer_len, |
132 |
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const u32 min_ip, const u32 max_ip) |
133 |
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{ |
134 |
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memset(buffer, 0, buffer_len); |
135 |
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snprintf(buffer, buffer_len - 1, "%u.%u.%u.%u%c%u.%u.%u.%u", |
136 |
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HIPQUAD(min_ip), min_ip == max_ip ? '\0' : '-', |
137 |
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HIPQUAD(max_ip)); |
138 |
} |
} |
139 |
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|
140 |
#if !defined(NIP6) |
#if !defined(NIP6) |
150 |
* |
* |
151 |
* @buffer: Buffer to write to. |
* @buffer: Buffer to write to. |
152 |
* @buffer_len: Size of @buffer. |
* @buffer_len: Size of @buffer. |
153 |
* @ip: Pointer to "struct in6_addr". |
* @min_ip: Pointer to "struct in6_addr". |
154 |
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* @max_ip: Pointer to "struct in6_addr". |
155 |
* |
* |
156 |
* Returns nothing. |
* Returns nothing. |
157 |
*/ |
*/ |
158 |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
void ccs_print_ipv6(char *buffer, const int buffer_len, |
159 |
const struct in6_addr *ip) |
const struct in6_addr *min_ip, |
160 |
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const struct in6_addr *max_ip) |
161 |
{ |
{ |
162 |
memset(buffer, 0, buffer_len); |
memset(buffer, 0, buffer_len); |
163 |
snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", NIP6(*ip)); |
snprintf(buffer, buffer_len - 1, |
164 |
} |
"%x:%x:%x:%x:%x:%x:%x:%x%c%x:%x:%x:%x:%x:%x:%x:%x", |
165 |
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NIP6(*min_ip), min_ip == max_ip ? '\0' : '-', |
166 |
/** |
NIP6(*max_ip)); |
167 |
* ccs_net2keyword - Convert network operation index to network operation name. |
} |
168 |
* |
|
169 |
* @operation: Type of operation. |
static bool ccs_check_network_acl(struct ccs_request_info *r, |
170 |
* |
const struct ccs_acl_info *ptr) |
171 |
* Returns the name of operation. |
{ |
172 |
*/ |
const struct ccs_ip_network_acl *acl = |
173 |
const char *ccs_net2keyword(const u8 operation) |
container_of(ptr, typeof(*acl), head); |
174 |
{ |
bool ret; |
175 |
const char *keyword = "unknown"; |
if (!(acl->perm & (1 << r->param.network.operation)) || |
176 |
switch (operation) { |
!ccs_compare_number_union(r->param.network.port, &acl->port)) |
177 |
case CCS_NETWORK_UDP_BIND: |
return false; |
178 |
keyword = "UDP bind"; |
switch (acl->address_type) { |
179 |
break; |
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
180 |
case CCS_NETWORK_UDP_CONNECT: |
ret = ccs_address_matches_group(r->param.network.is_ipv6, |
181 |
keyword = "UDP connect"; |
r->param.network.address, |
182 |
break; |
acl->address.group); |
183 |
case CCS_NETWORK_TCP_BIND: |
break; |
184 |
keyword = "TCP bind"; |
case CCS_IP_ADDRESS_TYPE_IPv4: |
185 |
break; |
ret = !r->param.network.is_ipv6 && |
186 |
case CCS_NETWORK_TCP_LISTEN: |
acl->address.ipv4.min <= r->param.network.ip && |
187 |
keyword = "TCP listen"; |
r->param.network.ip <= acl->address.ipv4.max; |
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break; |
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case CCS_NETWORK_TCP_CONNECT: |
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keyword = "TCP connect"; |
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break; |
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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"; |
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break; |
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case CCS_NETWORK_RAW_CONNECT: |
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keyword = "RAW connect"; |
|
188 |
break; |
break; |
189 |
} |
default: |
190 |
return keyword; |
ret = r->param.network.is_ipv6 && |
191 |
} |
memcmp(acl->address.ipv6.min, r->param.network.address, |
192 |
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16) <= 0 && |
193 |
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memcmp(r->param.network.address, acl->address.ipv6.max, |
194 |
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16) <= 0; |
195 |
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break; |
196 |
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} |
197 |
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return ret; |
198 |
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} |
199 |
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200 |
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static const u8 |
201 |
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ccs_net2mac[CCS_MAX_NETWORK_PROTOCOL][CCS_MAX_NETWORK_OPERATION] = { |
202 |
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[CCS_NETWORK_TCP_PROTOCOL] = { |
203 |
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[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_TCP_BIND, |
204 |
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[CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_TCP_LISTEN, |
205 |
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[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_TCP_CONNECT, |
206 |
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[CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_TCP_ACCEPT, |
207 |
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}, |
208 |
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[CCS_NETWORK_UDP_PROTOCOL] = { |
209 |
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[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UDP_BIND, |
210 |
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[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UDP_SEND, |
211 |
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[CCS_NETWORK_SEND] = CCS_MAC_NETWORK_UDP_SEND, |
212 |
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[CCS_NETWORK_RECV] = CCS_MAC_NETWORK_UDP_RECV, |
213 |
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}, |
214 |
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[CCS_NETWORK_RAW_PROTOCOL] = { |
215 |
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[CCS_NETWORK_BIND] = CCS_MAC_NETWORK_RAW_BIND, |
216 |
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[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_RAW_SEND, |
217 |
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[CCS_NETWORK_SEND] = CCS_MAC_NETWORK_RAW_SEND, |
218 |
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[CCS_NETWORK_RECV] = CCS_MAC_NETWORK_RAW_RECV, |
219 |
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}, |
220 |
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}; |
221 |
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|
222 |
/** |
/** |
223 |
* ccs_network_entry2 - Check permission for network operation. |
* ccs_network_entry - Check permission for network operation. |
224 |
* |
* |
225 |
* @is_ipv6: True if @address is an IPv6 address. |
* @address: Pointer to "struct ccs_ip_address". |
|
* @operation: Type of operation. |
|
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* @address: An IPv4 or IPv6 address. |
|
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* @port: Port number. |
|
226 |
* |
* |
227 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
|
* |
|
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* Caller holds ccs_read_lock(). |
|
228 |
*/ |
*/ |
229 |
static int ccs_network_entry2(const bool is_ipv6, const u8 operation, |
static int ccs_network_entry(const struct ccs_addr_info *address) |
|
const u32 *address, const u16 port) |
|
230 |
{ |
{ |
231 |
|
const int idx = ccs_read_lock(); |
232 |
struct ccs_request_info r; |
struct ccs_request_info r; |
233 |
struct ccs_acl_info *ptr; |
int error = 0; |
234 |
const char *keyword = ccs_net2keyword(operation); |
const u8 type = ccs_net2mac[address->protocol][address->operation]; |
235 |
const u16 perm = 1 << operation; |
if (!type || ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) { |
236 |
/* using host byte order to allow u32 comparison than memcmp().*/ |
r.param_type = CCS_TYPE_IP_NETWORK_ACL; |
237 |
const u32 ip = ntohl(*address); |
r.param.network.protocol = address->protocol; |
238 |
int error; |
r.param.network.operation = address->operation; |
239 |
char buf[64]; |
r.param.network.is_ipv6 = address->is_ipv6; |
240 |
ccs_assert_read_lock(); |
r.param.network.address = address->address; |
241 |
if (ccs_init_request_info(&r, NULL, |
r.param.network.port = ntohs(address->port); |
242 |
CCS_MAC_NETWORK_UDP_BIND + operation) |
/* use host byte order to allow u32 comparison than memcmp().*/ |
243 |
== CCS_MAC_MODE_DISABLED) |
r.param.network.ip = ntohl(*address->address); |
244 |
return 0; |
do { |
245 |
memset(buf, 0, sizeof(buf)); |
ccs_check_acl(&r, ccs_check_network_acl); |
246 |
if (is_ipv6) |
error = ccs_audit_network_log(&r); |
247 |
ccs_print_ipv6(buf, sizeof(buf), (const struct in6_addr *) |
} while (error == CCS_RETRY_REQUEST); |
248 |
address); |
} |
249 |
else |
ccs_read_unlock(idx); |
|
snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); |
|
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do { |
|
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error = -EPERM; |
|
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list_for_each_entry_rcu(ptr, &r.domain->acl_info_list, list) { |
|
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struct ccs_ip_network_acl *acl; |
|
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if (ptr->is_deleted || |
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ptr->type != CCS_TYPE_IP_NETWORK_ACL) |
|
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continue; |
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acl = container_of(ptr, struct ccs_ip_network_acl, |
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head); |
|
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if (!(acl->perm & perm)) |
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continue; |
|
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if (!ccs_compare_number_union(port, &acl->port) || |
|
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!ccs_condition(&r, ptr)) |
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continue; |
|
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switch (acl->address_type) { |
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case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
|
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if (!ccs_address_matches_group(is_ipv6, |
|
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address, |
|
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acl->address. |
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group)) |
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continue; |
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break; |
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case CCS_IP_ADDRESS_TYPE_IPv4: |
|
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if (is_ipv6 || ip < acl->address.ipv4.min || |
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acl->address.ipv4.max < ip) |
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continue; |
|
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break; |
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default: |
|
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if (!is_ipv6 || |
|
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memcmp(acl->address.ipv6.min, address, 16) |
|
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> 0 || |
|
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memcmp(address, acl->address.ipv6.max, 16) |
|
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> 0) |
|
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continue; |
|
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break; |
|
|
} |
|
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r.cond = ptr->cond; |
|
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error = 0; |
|
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break; |
|
|
} |
|
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ccs_audit_network_log(&r, keyword, buf, port, !error); |
|
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if (!error) |
|
|
break; |
|
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error = ccs_supervisor(&r, CCS_KEYWORD_ALLOW_NETWORK |
|
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"%s %s %u\n", keyword, buf, port); |
|
|
} while (error == 1); |
|
|
if (r.mode != CCS_MAC_MODE_ENFORCING) |
|
|
error = 0; |
|
250 |
return error; |
return error; |
251 |
} |
} |
252 |
|
|
253 |
/** |
static bool ccs_same_ip_network_acl(const struct ccs_acl_info *a, |
254 |
* ccs_network_entry - Check permission for network operation. |
const struct ccs_acl_info *b) |
|
* |
|
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* @is_ipv6: True if @address is an IPv6 address. |
|
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* @operation: Type of operation. |
|
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* @address: An IPv4 or IPv6 address. |
|
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* @port: Port number. |
|
|
* |
|
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* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
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static int ccs_network_entry(const bool is_ipv6, const u8 operation, |
|
|
const u32 *address, const u16 port) |
|
255 |
{ |
{ |
256 |
const int idx = ccs_read_lock(); |
const struct ccs_ip_network_acl *p1 = container_of(a, typeof(*p1), |
257 |
const int error = ccs_network_entry2(is_ipv6, operation, |
head); |
258 |
address, port); |
const struct ccs_ip_network_acl *p2 = container_of(b, typeof(*p2), |
259 |
ccs_read_unlock(idx); |
head); |
260 |
return error; |
return ccs_same_acl_head(&p1->head, &p2->head) |
261 |
|
&& p1->protocol == p2->protocol |
262 |
|
&& p1->address_type == p2->address_type && |
263 |
|
p1->address.ipv4.min == p2->address.ipv4.min && |
264 |
|
p1->address.ipv6.min == p2->address.ipv6.min && |
265 |
|
p1->address.ipv4.max == p2->address.ipv4.max && |
266 |
|
p1->address.ipv6.max == p2->address.ipv6.max && |
267 |
|
p1->address.group == p2->address.group && |
268 |
|
ccs_same_number_union(&p1->port, &p2->port); |
269 |
|
} |
270 |
|
|
271 |
|
static bool ccs_merge_ip_network_acl(struct ccs_acl_info *a, |
272 |
|
struct ccs_acl_info *b, |
273 |
|
const bool is_delete) |
274 |
|
{ |
275 |
|
u8 * const a_perm = &container_of(a, struct ccs_ip_network_acl, head) |
276 |
|
->perm; |
277 |
|
u8 perm = *a_perm; |
278 |
|
const u8 b_perm = container_of(b, struct ccs_ip_network_acl, head) |
279 |
|
->perm; |
280 |
|
if (is_delete) |
281 |
|
perm &= ~b_perm; |
282 |
|
else |
283 |
|
perm |= b_perm; |
284 |
|
*a_perm = perm; |
285 |
|
return !perm; |
286 |
} |
} |
287 |
|
|
288 |
/** |
/** |
289 |
* ccs_write_network_policy - Write "struct ccs_ip_network_acl" list. |
* ccs_write_network - Write "struct ccs_ip_network_acl" list. |
290 |
* |
* |
291 |
* @data: String to parse. |
* @data: String to parse. |
292 |
* @domain: Pointer to "struct ccs_domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
293 |
* @condition: Pointer to "struct ccs_condition". May be NULL. |
* @condition: Pointer to "struct ccs_condition". Maybe NULL. |
294 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
295 |
* |
* |
296 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
297 |
*/ |
*/ |
298 |
int ccs_write_network_policy(char *data, struct ccs_domain_info *domain, |
int ccs_write_network(char *data, struct ccs_domain_info *domain, |
299 |
struct ccs_condition *condition, |
struct ccs_condition *condition, const bool is_delete) |
|
const bool is_delete) |
|
300 |
{ |
{ |
|
struct ccs_ip_network_acl *entry = NULL; |
|
|
struct ccs_acl_info *ptr; |
|
301 |
struct ccs_ip_network_acl e = { |
struct ccs_ip_network_acl e = { |
302 |
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
.head.type = CCS_TYPE_IP_NETWORK_ACL, |
303 |
.head.cond = condition, |
.head.cond = condition, |
305 |
u16 min_address[8]; |
u16 min_address[8]; |
306 |
u16 max_address[8]; |
u16 max_address[8]; |
307 |
int error = is_delete ? -ENOENT : -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
308 |
u8 sock_type; |
u8 type; |
309 |
char *w[4]; |
char *w[4]; |
310 |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[3][0]) |
311 |
return -EINVAL; |
return -EINVAL; |
312 |
if (!strcmp(w[0], "TCP")) |
for (e.protocol = 0; e.protocol < CCS_MAX_NETWORK_PROTOCOL; |
313 |
sock_type = SOCK_STREAM; |
e.protocol++) |
314 |
else if (!strcmp(w[0], "UDP")) |
if (!strcmp(w[0], ccs_net_protocol_keyword[e.protocol])) |
315 |
sock_type = SOCK_DGRAM; |
break; |
316 |
else if (!strcmp(w[0], "RAW")) |
for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++) |
317 |
sock_type = SOCK_RAW; |
if (ccs_permstr(w[1], ccs_net_keyword[type])) |
318 |
else |
e.perm |= 1 << type; |
319 |
return -EINVAL; |
if (e.protocol == CCS_MAX_NETWORK_PROTOCOL || !e.perm) |
|
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; |
|
|
break; |
|
|
} |
|
|
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "listen")) |
|
|
e.perm = 1 << CCS_NETWORK_TCP_LISTEN; |
|
|
else if (sock_type == SOCK_STREAM && !strcmp(w[1], "accept")) |
|
|
e.perm = 1 << CCS_NETWORK_TCP_ACCEPT; |
|
|
else |
|
320 |
return -EINVAL; |
return -EINVAL; |
321 |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
switch (ccs_parse_ip_address(w[2], min_address, max_address)) { |
322 |
case 2: |
case CCS_IP_ADDRESS_TYPE_IPv6: |
323 |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv6; |
324 |
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
e.address.ipv6.min = ccs_get_ipv6_address((struct in6_addr *) |
325 |
min_address); |
min_address); |
328 |
if (!e.address.ipv6.min || !e.address.ipv6.max) |
if (!e.address.ipv6.min || !e.address.ipv6.max) |
329 |
goto out; |
goto out; |
330 |
break; |
break; |
331 |
case 1: |
case CCS_IP_ADDRESS_TYPE_IPv4: |
332 |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
e.address_type = CCS_IP_ADDRESS_TYPE_IPv4; |
333 |
/* use host byte order to allow u32 comparison.*/ |
/* use host byte order to allow u32 comparison.*/ |
334 |
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
e.address.ipv4.min = ntohl(*(u32 *) min_address); |
338 |
if (w[2][0] != '@') |
if (w[2][0] != '@') |
339 |
return -EINVAL; |
return -EINVAL; |
340 |
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
e.address_type = CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP; |
341 |
e.address.group = ccs_get_address_group(w[2] + 1); |
e.address.group = ccs_get_group(w[2] + 1, CCS_ADDRESS_GROUP); |
342 |
if (!e.address.group) |
if (!e.address.group) |
343 |
return -ENOMEM; |
return -ENOMEM; |
344 |
break; |
break; |
345 |
} |
} |
346 |
if (!ccs_parse_number_union(w[3], &e.port)) |
if (!ccs_parse_number_union(w[3], &e.port)) |
347 |
goto out; |
goto out; |
348 |
if (!is_delete) |
error = ccs_update_domain(&e.head, sizeof(e), is_delete, domain, |
349 |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
ccs_same_ip_network_acl, |
350 |
mutex_lock(&ccs_policy_lock); |
ccs_merge_ip_network_acl); |
|
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); |
|
351 |
out: |
out: |
352 |
if (w[2][0] == '@') |
if (e.address_type == CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP) |
353 |
ccs_put_address_group(e.address.group); |
ccs_put_group(e.address.group); |
354 |
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
else if (e.address_type == CCS_IP_ADDRESS_TYPE_IPv6) { |
355 |
ccs_put_ipv6_address(e.address.ipv6.min); |
ccs_put_ipv6_address(e.address.ipv6.min); |
356 |
ccs_put_ipv6_address(e.address.ipv6.max); |
ccs_put_ipv6_address(e.address.ipv6.max); |
357 |
} |
} |
358 |
ccs_put_number_union(&e.port); |
ccs_put_number_union(&e.port); |
|
kfree(entry); |
|
359 |
return error; |
return error; |
360 |
} |
} |
361 |
|
|
362 |
/** |
#ifndef CONFIG_NET |
|
* ccs_network_listen_acl - Check permission for listen() 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_listen_acl(const bool is_ipv6, |
|
|
const u8 *address, |
|
|
const u16 port) |
|
|
{ |
|
|
return ccs_network_entry(is_ipv6, CCS_NETWORK_TCP_LISTEN, |
|
|
(const u32 *) address, ntohs(port)); |
|
|
} |
|
363 |
|
|
364 |
/** |
void __init ccs_network_init(void) |
|
* ccs_network_connect_acl - Check permission for connect() operation. |
|
|
* |
|
|
* @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) |
|
365 |
{ |
{ |
|
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)); |
|
366 |
} |
} |
367 |
|
|
368 |
/** |
#else |
369 |
* ccs_network_bind_acl - Check permission for bind() operation. |
|
370 |
* |
static bool ccs_check_address(const struct sockaddr *addr, |
371 |
* @is_ipv6: True if @address is an IPv6 address. |
const unsigned int addr_len, |
372 |
* @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) |
|
373 |
{ |
{ |
374 |
u8 operation; |
switch (addr->sa_family) { |
375 |
switch (sock_type) { |
case AF_INET6: |
376 |
case SOCK_STREAM: |
if (addr_len < SIN6_LEN_RFC2133) |
377 |
operation = CCS_NETWORK_TCP_BIND; |
goto skip; |
378 |
|
address->is_ipv6 = true; |
379 |
|
address->address = (u32 *) |
380 |
|
((struct sockaddr_in6 *) addr)->sin6_addr.s6_addr; |
381 |
|
address->port = ((struct sockaddr_in6 *) addr)->sin6_port; |
382 |
break; |
break; |
383 |
case SOCK_DGRAM: |
case AF_INET: |
384 |
operation = CCS_NETWORK_UDP_BIND; |
if (addr_len < sizeof(struct sockaddr_in)) |
385 |
|
goto skip; |
386 |
|
address->is_ipv6 = false; |
387 |
|
address->address = (u32 *) |
388 |
|
&((struct sockaddr_in *) addr)->sin_addr; |
389 |
|
address->port = ((struct sockaddr_in *) addr)->sin_port; |
390 |
break; |
break; |
391 |
default: |
default: |
392 |
operation = CCS_NETWORK_RAW_BIND; |
goto skip; |
393 |
} |
} |
394 |
return ccs_network_entry(is_ipv6, operation, |
return true; |
395 |
(const u32 *) address, ntohs(port)); |
skip: |
396 |
} |
return false; |
|
|
|
|
/** |
|
|
* 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; |
|
397 |
} |
} |
398 |
|
|
|
/** |
|
|
* ccs_network_sendmsg_acl - Check permission for sendmsg() operation. |
|
|
* |
|
|
* @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) |
|
|
{ |
|
|
u8 operation; |
|
|
if (sock_type == SOCK_DGRAM) |
|
|
operation = CCS_NETWORK_UDP_CONNECT; |
|
|
else |
|
|
operation = CCS_NETWORK_RAW_CONNECT; |
|
|
return ccs_network_entry(is_ipv6, operation, |
|
|
(const u32 *) address, ntohs(port)); |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_network_recvmsg_acl - Check permission for recvmsg() operation. |
|
|
* |
|
|
* @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_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; |
|
|
} |
|
|
|
|
|
#define MAX_SOCK_ADDR 128 /* net/socket.c */ |
|
|
|
|
399 |
/* Check permission for creating a socket. */ |
/* Check permission for creating a socket. */ |
400 |
int ccs_socket_create_permission(int family, int type, int protocol) |
static int __ccs_socket_create_permission(int family, int type, int protocol) |
401 |
{ |
{ |
|
int error = 0; |
|
402 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
403 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
404 |
return 0; |
return 0; |
406 |
return -EPERM; |
return -EPERM; |
407 |
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET)) |
408 |
return -EPERM; |
return -EPERM; |
409 |
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; |
|
410 |
} |
} |
411 |
|
|
412 |
/* Check permission for listening a TCP socket. */ |
/* Check permission for listening a TCP socket. */ |
413 |
int ccs_socket_listen_permission(struct socket *sock) |
static int __ccs_socket_listen_permission(struct socket *sock) |
414 |
{ |
{ |
415 |
|
struct sockaddr_storage addr; |
416 |
int error = 0; |
int error = 0; |
|
char addr[MAX_SOCK_ADDR]; |
|
417 |
int addr_len; |
int addr_len; |
418 |
|
struct ccs_addr_info address; |
419 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
420 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
421 |
return 0; |
return 0; |
428 |
default: |
default: |
429 |
return 0; |
return 0; |
430 |
} |
} |
431 |
if (!ccs_capable(CCS_INET_STREAM_SOCKET_LISTEN)) |
if (sock->ops->getname(sock, (struct sockaddr *) &addr, &addr_len, 0)) |
|
return -EPERM; |
|
|
if (sock->ops->getname(sock, (struct sockaddr *) addr, &addr_len, 0)) |
|
432 |
return -EPERM; |
return -EPERM; |
433 |
switch (((struct sockaddr *) addr)->sa_family) { |
address.protocol = CCS_NETWORK_TCP_PROTOCOL; |
434 |
struct sockaddr_in6 *addr6; |
address.operation = CCS_NETWORK_LISTEN; |
435 |
struct sockaddr_in *addr4; |
if (ccs_check_address((struct sockaddr *) &addr, addr_len, &address)) |
436 |
case AF_INET6: |
error = ccs_network_entry(&address); |
437 |
addr6 = (struct sockaddr_in6 *) addr; |
return error; |
|
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; |
|
438 |
} |
} |
439 |
|
|
440 |
/* Check permission for setting the remote IP address/port pair of a socket. */ |
/* Check permission for setting the remote IP address/port pair of a socket. */ |
441 |
int ccs_socket_connect_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_connect_permission(struct socket *sock, |
442 |
int addr_len) |
struct sockaddr *addr, int addr_len) |
443 |
{ |
{ |
444 |
int error = 0; |
int error = 0; |
445 |
const unsigned int type = sock->type; |
const unsigned int type = sock->type; |
446 |
|
struct ccs_addr_info address; |
447 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
448 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
449 |
return 0; |
return 0; |
450 |
switch (type) { |
switch (type) { |
451 |
case SOCK_STREAM: |
case SOCK_STREAM: |
452 |
|
address.protocol = CCS_NETWORK_TCP_PROTOCOL; |
453 |
|
break; |
454 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
455 |
|
address.protocol = CCS_NETWORK_UDP_PROTOCOL; |
456 |
|
break; |
457 |
case SOCK_RAW: |
case SOCK_RAW: |
458 |
|
address.protocol = CCS_NETWORK_RAW_PROTOCOL; |
459 |
break; |
break; |
460 |
default: |
default: |
461 |
return 0; |
return 0; |
462 |
} |
} |
463 |
switch (addr->sa_family) { |
address.operation = CCS_NETWORK_CONNECT; |
464 |
struct sockaddr_in6 *addr6; |
if (!ccs_check_address(addr, addr_len, &address)) |
465 |
struct sockaddr_in *addr4; |
goto skip; |
466 |
u16 port; |
if (type == SOCK_RAW) |
467 |
case AF_INET6: |
address.port = htons(sock->sk->sk_protocol); |
468 |
if (addr_len < SIN6_LEN_RFC2133) |
error = ccs_network_entry(&address); |
469 |
break; |
skip: |
|
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; |
|
|
} |
|
470 |
return error; |
return error; |
471 |
} |
} |
472 |
|
|
473 |
/* Check permission for setting the local IP address/port pair of a socket. */ |
/* Check permission for setting the local IP address/port pair of a socket. */ |
474 |
int ccs_socket_bind_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_bind_permission(struct socket *sock, |
475 |
int addr_len) |
struct sockaddr *addr, int addr_len) |
476 |
{ |
{ |
477 |
int error = 0; |
int error = 0; |
478 |
const unsigned int type = sock->type; |
const unsigned int type = sock->type; |
479 |
|
struct ccs_addr_info address; |
480 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
481 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
482 |
return 0; |
return 0; |
483 |
switch (type) { |
switch (type) { |
484 |
case SOCK_STREAM: |
case SOCK_STREAM: |
485 |
|
address.protocol = CCS_NETWORK_TCP_PROTOCOL; |
486 |
|
break; |
487 |
case SOCK_DGRAM: |
case SOCK_DGRAM: |
488 |
|
address.protocol = CCS_NETWORK_UDP_PROTOCOL; |
489 |
|
break; |
490 |
case SOCK_RAW: |
case SOCK_RAW: |
491 |
|
address.protocol = CCS_NETWORK_RAW_PROTOCOL; |
492 |
break; |
break; |
493 |
default: |
default: |
494 |
return 0; |
return 0; |
495 |
} |
} |
496 |
switch (addr->sa_family) { |
address.operation = CCS_NETWORK_BIND; |
497 |
struct sockaddr_in6 *addr6; |
if (!ccs_check_address(addr, addr_len, &address)) |
498 |
struct sockaddr_in *addr4; |
goto skip; |
499 |
u16 port; |
if (type == SOCK_RAW) |
500 |
case AF_INET6: |
address.port = htons(sock->sk->sk_protocol); |
501 |
if (addr_len < SIN6_LEN_RFC2133) |
error = ccs_network_entry(&address); |
502 |
break; |
skip: |
|
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; |
|
|
} |
|
503 |
return error; |
return error; |
504 |
} |
} |
505 |
|
|
506 |
/* |
/* Check permission for accepting a TCP socket. */ |
507 |
* Check permission for accepting a TCP socket. |
static int __ccs_socket_post_accept_permission(struct socket *sock, |
508 |
* |
struct socket *newsock) |
|
* Currently, the LSM hook for this purpose is not provided. |
|
|
*/ |
|
|
int ccs_socket_accept_permission(struct socket *sock, struct sockaddr *addr) |
|
509 |
{ |
{ |
510 |
|
struct sockaddr_storage addr; |
511 |
|
struct task_struct * const task = current; |
512 |
int error = 0; |
int error = 0; |
513 |
int addr_len; |
int addr_len; |
514 |
|
struct ccs_addr_info address; |
515 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
516 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
517 |
return 0; |
return 0; |
518 |
switch (sock->sk->sk_family) { |
switch (newsock->sk->sk_family) { |
519 |
case PF_INET: |
case PF_INET: |
520 |
case PF_INET6: |
case PF_INET6: |
521 |
break; |
break; |
522 |
default: |
default: |
523 |
return 0; |
return 0; |
524 |
} |
} |
525 |
error = sock->ops->getname(sock, addr, &addr_len, 2); |
error = newsock->ops->getname(newsock, (struct sockaddr *) &addr, |
526 |
|
&addr_len, 2); |
527 |
if (error) |
if (error) |
528 |
return error; |
return error; |
529 |
switch (addr->sa_family) { |
if (!ccs_check_address((struct sockaddr *) &addr, addr_len, |
530 |
struct sockaddr_in6 *addr6; |
&address)) |
531 |
struct sockaddr_in *addr4; |
goto skip; |
532 |
case AF_INET6: |
address.protocol = CCS_NETWORK_TCP_PROTOCOL; |
533 |
addr6 = (struct sockaddr_in6 *) addr; |
address.operation = CCS_NETWORK_ACCEPT; |
534 |
error = ccs_network_accept_acl(true, |
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
535 |
addr6->sin6_addr.s6_addr, |
error = ccs_network_entry(&address); |
536 |
addr6->sin6_port); |
task->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
537 |
break; |
skip: |
|
case AF_INET: |
|
|
addr4 = (struct sockaddr_in *) addr; |
|
|
error = ccs_network_accept_acl(false, |
|
|
(u8 *) &addr4->sin_addr, |
|
|
addr4->sin_port); |
|
|
break; |
|
|
} |
|
538 |
return error; |
return error; |
539 |
} |
} |
540 |
|
|
541 |
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
/* Check permission for sending a datagram via a UDP or RAW socket. */ |
542 |
int ccs_socket_sendmsg_permission(struct socket *sock, struct sockaddr *addr, |
static int __ccs_socket_sendmsg_permission(struct socket *sock, |
543 |
int addr_len) |
struct msghdr *msg, int size) |
544 |
{ |
{ |
545 |
int error = 0; |
int error = 0; |
546 |
const int type = sock->type; |
const int type = sock->type; |
547 |
|
struct ccs_addr_info address; |
548 |
|
if (!msg->msg_name) |
549 |
|
return 0; |
550 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
551 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
552 |
return 0; |
return 0; |
553 |
if (!addr || (type != SOCK_DGRAM && type != SOCK_RAW)) |
switch (type) { |
554 |
return 0; |
case SOCK_DGRAM: |
555 |
switch (addr->sa_family) { |
address.protocol = CCS_NETWORK_UDP_PROTOCOL; |
|
struct sockaddr_in6 *addr6; |
|
|
struct sockaddr_in *addr4; |
|
|
u16 port; |
|
|
case AF_INET6: |
|
|
if (addr_len < SIN6_LEN_RFC2133) |
|
|
break; |
|
|
addr6 = (struct sockaddr_in6 *) addr; |
|
|
if (type == SOCK_DGRAM) |
|
|
port = addr6->sin6_port; |
|
|
else |
|
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_sendmsg_acl(true, type, |
|
|
addr6->sin6_addr.s6_addr, |
|
|
port); |
|
556 |
break; |
break; |
557 |
case AF_INET: |
case SOCK_RAW: |
558 |
if (addr_len < sizeof(struct sockaddr_in)) |
address.protocol = CCS_NETWORK_RAW_PROTOCOL; |
|
break; |
|
|
addr4 = (struct sockaddr_in *) addr; |
|
|
if (type == SOCK_DGRAM) |
|
|
port = addr4->sin_port; |
|
|
else |
|
|
port = htons(sock->sk->sk_protocol); |
|
|
error = ccs_network_sendmsg_acl(false, type, |
|
|
(u8 *) &addr4->sin_addr, |
|
|
port); |
|
559 |
break; |
break; |
560 |
|
default: |
561 |
|
return 0; |
562 |
} |
} |
563 |
|
address.operation = CCS_NETWORK_SEND; |
564 |
|
if (!ccs_check_address((struct sockaddr *) msg->msg_name, |
565 |
|
msg->msg_namelen, &address)) |
566 |
|
goto skip; |
567 |
|
if (type == SOCK_RAW) |
568 |
|
address.port = htons(sock->sk->sk_protocol); |
569 |
|
error = ccs_network_entry(&address); |
570 |
|
skip: |
571 |
return error; |
return error; |
572 |
} |
} |
573 |
|
|
574 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22) |
575 |
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 |
576 |
|
#if !defined(AX_MAJOR) || AX_MAJOR != 3 || !defined(AX_MINOR) || AX_MINOR < 2 |
577 |
|
|
578 |
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
579 |
{ |
{ |
592 |
|
|
593 |
#endif |
#endif |
594 |
#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); |
|
|
} |
|
595 |
#endif |
#endif |
596 |
|
|
597 |
/* |
/* Check permission for receiving a datagram via a UDP or RAW socket. */ |
598 |
* Check permission for receiving a datagram via a UDP or RAW socket. |
static int __ccs_socket_post_recvmsg_permission(struct sock *sk, |
599 |
* |
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) |
|
600 |
{ |
{ |
601 |
|
struct task_struct * const task = current; |
602 |
int error = 0; |
int error = 0; |
603 |
const unsigned int type = sk->sk_type; |
const unsigned int type = sk->sk_type; |
604 |
if (type != SOCK_DGRAM && type != SOCK_RAW) |
struct ccs_addr_info address; |
605 |
|
union { |
606 |
|
struct in6_addr sin6; |
607 |
|
struct in_addr sin4; |
608 |
|
} ip_address; |
609 |
|
switch (type) { |
610 |
|
case SOCK_DGRAM: |
611 |
|
address.protocol = CCS_NETWORK_UDP_PROTOCOL; |
612 |
|
break; |
613 |
|
case SOCK_RAW: |
614 |
|
address.protocol = CCS_NETWORK_RAW_PROTOCOL; |
615 |
|
break; |
616 |
|
default: |
617 |
return 0; |
return 0; |
618 |
|
} |
619 |
/* Nothing to do if I am a kernel service. */ |
/* Nothing to do if I am a kernel service. */ |
620 |
if (segment_eq(get_fs(), KERNEL_DS)) |
if (segment_eq(get_fs(), KERNEL_DS)) |
621 |
return 0; |
return 0; |
|
|
|
622 |
switch (sk->sk_family) { |
switch (sk->sk_family) { |
|
struct in6_addr sin6; |
|
|
struct in_addr sin4; |
|
|
u16 port; |
|
623 |
case PF_INET6: |
case PF_INET6: |
624 |
if (type == SOCK_DGRAM) { /* UDP IPv6 */ |
address.is_ipv6 = true; |
625 |
if (skb->protocol == htons(ETH_P_IP)) { |
if (type == SOCK_DGRAM && skb->protocol == htons(ETH_P_IP)) |
626 |
ipv6_addr_set(&sin6, 0, 0, htonl(0xffff), |
ipv6_addr_set(&ip_address.sin6, 0, 0, htonl(0xffff), |
627 |
ip_hdr(skb)->saddr); |
ip_hdr(skb)->saddr); |
628 |
} else { |
else |
629 |
ipv6_addr_copy(&sin6, &ipv6_hdr(skb)->saddr); |
ipv6_addr_copy(&ip_address.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); |
|
630 |
break; |
break; |
631 |
case PF_INET: |
case PF_INET: |
632 |
if (type == SOCK_DGRAM) { /* UDP IPv4 */ |
address.is_ipv6 = false; |
633 |
sin4.s_addr = ip_hdr(skb)->saddr; |
ip_address.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); |
|
634 |
break; |
break; |
635 |
|
default: |
636 |
|
goto skip; |
637 |
} |
} |
638 |
if (!error) |
address.address = (u32 *) &ip_address; |
|
return 0; |
|
|
/* |
|
|
* Remove from queue if MSG_PEEK is used so that |
|
|
* the head message from unwanted source in receive queue will not |
|
|
* prevent the caller from picking up next message from wanted source |
|
|
* when the caller is using MSG_PEEK flag for picking up. |
|
|
*/ |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
|
|
if (type == SOCK_DGRAM) |
|
|
lock_sock(sk); |
|
|
#endif |
|
|
skb_kill_datagram(sk, skb, flags); |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
|
639 |
if (type == SOCK_DGRAM) |
if (type == SOCK_DGRAM) |
640 |
release_sock(sk); |
address.port = udp_hdr(skb)->source; |
641 |
#endif |
else |
642 |
/* Hope less harmful than -EPERM. */ |
address.port = htons(sk->sk_protocol); |
643 |
return -ENOMEM; |
address.operation = CCS_NETWORK_RECV; |
644 |
|
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
645 |
|
error = ccs_network_entry(&address); |
646 |
|
task->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
647 |
|
skip: |
648 |
|
return error; |
649 |
} |
} |
650 |
EXPORT_SYMBOL(ccs_socket_recvmsg_permission); |
|
651 |
|
void __init ccs_network_init(void) |
652 |
|
{ |
653 |
|
ccsecurity_ops.socket_create_permission = |
654 |
|
__ccs_socket_create_permission; |
655 |
|
ccsecurity_ops.socket_listen_permission = |
656 |
|
__ccs_socket_listen_permission; |
657 |
|
ccsecurity_ops.socket_connect_permission = |
658 |
|
__ccs_socket_connect_permission; |
659 |
|
ccsecurity_ops.socket_bind_permission = __ccs_socket_bind_permission; |
660 |
|
ccsecurity_ops.socket_post_accept_permission = |
661 |
|
__ccs_socket_post_accept_permission; |
662 |
|
ccsecurity_ops.socket_sendmsg_permission = |
663 |
|
__ccs_socket_sendmsg_permission; |
664 |
|
ccsecurity_ops.socket_post_recvmsg_permission = |
665 |
|
__ccs_socket_post_recvmsg_permission; |
666 |
|
} |
667 |
|
|
668 |
|
#endif |