1 #ifndef ITEM_INETFUNC_INCLUDED
2 #define ITEM_INETFUNC_INCLUDED
3 
4 /* Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
5 
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License, version 2.0,
8    as published by the Free Software Foundation.
9 
10    This program is also distributed with certain software (including
11    but not limited to OpenSSL) that is licensed under separate terms,
12    as designated in a particular file or component or in included license
13    documentation.  The authors of MySQL hereby grant you an additional
14    permission to link the program and your derivative works with the
15    separately licensed software that they have included with MySQL.
16 
17    This program is distributed in the hope that it will be useful,
18    but WITHOUT ANY WARRANTY; without even the implied warranty of
19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20    GNU General Public License, version 2.0, for more details.
21 
22    You should have received a copy of the GNU General Public License
23    along with this program; if not, write to the Free Software
24    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
25 
26 #include "my_global.h"
27 #include "item_cmpfunc.h"  // Item_bool_func
28 #include "item_strfunc.h"  // Item_str_func
29 
30 /*************************************************************************
31   Item_func_inet_aton implements INET_ATON() SQL-function.
32 *************************************************************************/
33 
34 class Item_func_inet_aton : public Item_int_func
35 {
36 public:
Item_func_inet_aton(const POS & pos,Item * arg)37   inline Item_func_inet_aton(const POS &pos, Item *arg)
38     : Item_int_func(pos, arg)
39   {}
40 
41 public:
42   virtual longlong val_int();
43 
func_name()44   virtual const char *func_name() const
45   { return "inet_aton"; }
46 
fix_length_and_dec()47   virtual void fix_length_and_dec()
48   {
49     decimals= 0;
50     max_length= 21;
51     maybe_null= 1;
52     unsigned_flag= 1;
53   }
54 };
55 
56 
57 /*************************************************************************
58   Item_func_inet_ntoa implements INET_NTOA() SQL-function.
59 *************************************************************************/
60 
61 class Item_func_inet_ntoa : public Item_str_func
62 {
63 public:
Item_func_inet_ntoa(const POS & pos,Item * arg)64   inline Item_func_inet_ntoa(const POS &pos, Item *arg)
65     : Item_str_func(pos, arg)
66   { }
67 
68 public:
69   virtual String* val_str(String* str);
70 
func_name()71   virtual const char *func_name() const
72   { return "inet_ntoa"; }
73 
fix_length_and_dec()74   virtual void fix_length_and_dec()
75   {
76     decimals= 0;
77     fix_length_and_charset(3 * 8 + 7, default_charset());
78     maybe_null= 1;
79   }
80 };
81 
82 
83 /*************************************************************************
84   Item_func_inet_bool_base implements common code for INET6/IP-related
85   functions returning boolean value.
86 *************************************************************************/
87 
88 class Item_func_inet_bool_base : public Item_bool_func
89 {
90 public:
Item_func_inet_bool_base(const POS & pos,Item * ip_addr)91   Item_func_inet_bool_base(const POS &pos, Item *ip_addr)
92     : Item_bool_func(pos, ip_addr)
93   {
94     null_value= false;
95   }
96 
97 public:
98   virtual longlong val_int();
99 
100 protected:
101   virtual bool calc_value(const String *arg) = 0;
102 };
103 
104 
105 /*************************************************************************
106   Item_func_inet_str_base implements common code for INET6/IP-related
107   functions returning string value.
108 *************************************************************************/
109 
110 class Item_func_inet_str_base : public Item_str_ascii_func
111 {
112 public:
Item_func_inet_str_base(const POS & pos,Item * arg)113   Item_func_inet_str_base(const POS &pos, Item *arg)
114     : Item_str_ascii_func(pos, arg)
115   { }
116 
117 public:
118   virtual String *val_str_ascii(String *buffer);
119 
120 protected:
121   virtual bool calc_value(String *arg, String *buffer) = 0;
122 };
123 
124 
125 /*************************************************************************
126   Item_func_inet6_aton implements INET6_ATON() SQL-function.
127 *************************************************************************/
128 
129 class Item_func_inet6_aton : public Item_func_inet_str_base
130 {
131 public:
Item_func_inet6_aton(const POS & pos,Item * ip_addr)132   Item_func_inet6_aton(const POS &pos, Item *ip_addr)
133     : Item_func_inet_str_base(pos, ip_addr)
134   { }
135 
136 public:
func_name()137   virtual const char *func_name() const
138   { return "inet6_aton"; }
139 
fix_length_and_dec()140   virtual void fix_length_and_dec()
141   {
142     decimals= 0;
143     fix_length_and_charset(16, &my_charset_bin);
144     maybe_null= 1;
145   }
146 
147 protected:
148   virtual bool calc_value(String *arg, String *buffer);
149 };
150 
151 
152 /*************************************************************************
153   Item_func_inet6_ntoa implements INET6_NTOA() SQL-function.
154 *************************************************************************/
155 
156 class Item_func_inet6_ntoa : public Item_func_inet_str_base
157 {
158 public:
Item_func_inet6_ntoa(const POS & pos,Item * ip_addr)159   Item_func_inet6_ntoa(const POS &pos, Item *ip_addr)
160     : Item_func_inet_str_base(pos, ip_addr)
161   { }
162 
163 public:
func_name()164   virtual const char *func_name() const
165   { return "inet6_ntoa"; }
166 
fix_length_and_dec()167   virtual void fix_length_and_dec()
168   {
169     decimals= 0;
170 
171     // max length: IPv6-address -- 16 bytes
172     // 16 bytes / 2 bytes per group == 8 groups => 7 delimiter
173     // 4 symbols per group
174     fix_length_and_charset(8 * 4 + 7, default_charset());
175 
176     maybe_null= 1;
177   }
178 
179 protected:
180   virtual bool calc_value(String *arg, String *buffer);
181 };
182 
183 
184 /*************************************************************************
185   Item_func_is_ipv4 implements IS_IPV4() SQL-function.
186 *************************************************************************/
187 
188 class Item_func_is_ipv4 : public Item_func_inet_bool_base
189 {
190 public:
Item_func_is_ipv4(const POS & pos,Item * ip_addr)191   Item_func_is_ipv4(const POS &pos, Item *ip_addr)
192     : Item_func_inet_bool_base(pos, ip_addr)
193   { }
194 
195 public:
func_name()196   virtual const char *func_name() const
197   { return "is_ipv4"; }
198 
199 protected:
200   virtual bool calc_value(const String *arg);
201 };
202 
203 
204 /*************************************************************************
205   Item_func_is_ipv6 implements IS_IPV6() SQL-function.
206 *************************************************************************/
207 
208 class Item_func_is_ipv6 : public Item_func_inet_bool_base
209 {
210 public:
Item_func_is_ipv6(const POS & pos,Item * ip_addr)211   Item_func_is_ipv6(const POS &pos, Item *ip_addr)
212     : Item_func_inet_bool_base(pos, ip_addr)
213   { }
214 
215 public:
func_name()216   virtual const char *func_name() const
217   { return "is_ipv6"; }
218 
219 protected:
220   virtual bool calc_value(const String *arg);
221 };
222 
223 
224 /*************************************************************************
225   Item_func_is_ipv4_compat implements IS_IPV4_COMPAT() SQL-function.
226 *************************************************************************/
227 
228 class Item_func_is_ipv4_compat : public Item_func_inet_bool_base
229 {
230 public:
Item_func_is_ipv4_compat(const POS & pos,Item * ip_addr)231   Item_func_is_ipv4_compat(const POS &pos, Item *ip_addr)
232     : Item_func_inet_bool_base(pos, ip_addr)
233   { }
234 
235 public:
func_name()236   virtual const char *func_name() const
237   { return "is_ipv4_compat"; }
238 
239 protected:
240   virtual bool calc_value(const String *arg);
241 };
242 
243 
244 /*************************************************************************
245   Item_func_is_ipv4_mapped implements IS_IPV4_MAPPED() SQL-function.
246 *************************************************************************/
247 
248 class Item_func_is_ipv4_mapped : public Item_func_inet_bool_base
249 {
250 public:
Item_func_is_ipv4_mapped(const POS & pos,Item * ip_addr)251   Item_func_is_ipv4_mapped(const POS &pos, Item *ip_addr)
252     : Item_func_inet_bool_base(pos, ip_addr)
253   { }
254 
255 public:
func_name()256   virtual const char *func_name() const
257   { return "is_ipv4_mapped"; }
258 
259 protected:
260   virtual bool calc_value(const String *arg);
261 };
262 
263 #endif // ITEM_INETFUNC_INCLUDED
264