~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/netfilter/ipset/ip_set_hash_mac.c

Version: ~ [ linux-5.5-rc6 ] ~ [ linux-5.4.11 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.95 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.164 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.209 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.209 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.81 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* Copyright (C) 2014 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
  2  *
  3  * This program is free software; you can redistribute it and/or modify
  4  * it under the terms of the GNU General Public License version 2 as
  5  * published by the Free Software Foundation.
  6  */
  7 
  8 /* Kernel module implementing an IP set type: the hash:mac type */
  9 
 10 #include <linux/jhash.h>
 11 #include <linux/module.h>
 12 #include <linux/etherdevice.h>
 13 #include <linux/skbuff.h>
 14 #include <linux/errno.h>
 15 #include <linux/if_ether.h>
 16 #include <net/netlink.h>
 17 
 18 #include <linux/netfilter.h>
 19 #include <linux/netfilter/ipset/ip_set.h>
 20 #include <linux/netfilter/ipset/ip_set_hash.h>
 21 
 22 #define IPSET_TYPE_REV_MIN      0
 23 #define IPSET_TYPE_REV_MAX      0
 24 
 25 MODULE_LICENSE("GPL");
 26 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
 27 IP_SET_MODULE_DESC("hash:mac", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
 28 MODULE_ALIAS("ip_set_hash:mac");
 29 
 30 /* Type specific function prefix */
 31 #define HTYPE           hash_mac
 32 
 33 /* Member elements */
 34 struct hash_mac4_elem {
 35         /* Zero valued IP addresses cannot be stored */
 36         union {
 37                 unsigned char ether[ETH_ALEN];
 38                 __be32 foo[2];
 39         };
 40 };
 41 
 42 /* Common functions */
 43 
 44 static inline bool
 45 hash_mac4_data_equal(const struct hash_mac4_elem *e1,
 46                      const struct hash_mac4_elem *e2,
 47                      u32 *multi)
 48 {
 49         return ether_addr_equal(e1->ether, e2->ether);
 50 }
 51 
 52 static inline bool
 53 hash_mac4_data_list(struct sk_buff *skb, const struct hash_mac4_elem *e)
 54 {
 55         if (nla_put(skb, IPSET_ATTR_ETHER, ETH_ALEN, e->ether))
 56                 goto nla_put_failure;
 57         return false;
 58 
 59 nla_put_failure:
 60         return true;
 61 }
 62 
 63 static inline void
 64 hash_mac4_data_next(struct hash_mac4_elem *next,
 65                     const struct hash_mac4_elem *e)
 66 {
 67 }
 68 
 69 #define MTYPE           hash_mac4
 70 #define HOST_MASK       32
 71 #define IP_SET_EMIT_CREATE
 72 #define IP_SET_PROTO_UNDEF
 73 #include "ip_set_hash_gen.h"
 74 
 75 static int
 76 hash_mac4_kadt(struct ip_set *set, const struct sk_buff *skb,
 77                const struct xt_action_param *par,
 78                enum ipset_adt adt, struct ip_set_adt_opt *opt)
 79 {
 80         ipset_adtfn adtfn = set->variant->adt[adt];
 81         struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
 82         struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
 83 
 84         if (skb_mac_header(skb) < skb->head ||
 85             (skb_mac_header(skb) + ETH_HLEN) > skb->data)
 86                 return -EINVAL;
 87 
 88         if (opt->flags & IPSET_DIM_ONE_SRC)
 89                 ether_addr_copy(e.ether, eth_hdr(skb)->h_source);
 90         else
 91                 ether_addr_copy(e.ether, eth_hdr(skb)->h_dest);
 92 
 93         if (is_zero_ether_addr(e.ether))
 94                 return -EINVAL;
 95         return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
 96 }
 97 
 98 static int
 99 hash_mac4_uadt(struct ip_set *set, struct nlattr *tb[],
100                enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
101 {
102         ipset_adtfn adtfn = set->variant->adt[adt];
103         struct hash_mac4_elem e = { { .foo[0] = 0, .foo[1] = 0 } };
104         struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
105         int ret;
106 
107         if (tb[IPSET_ATTR_LINENO])
108                 *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
109 
110         if (unlikely(!tb[IPSET_ATTR_ETHER] ||
111                      nla_len(tb[IPSET_ATTR_ETHER]) != ETH_ALEN))
112                 return -IPSET_ERR_PROTOCOL;
113 
114         ret = ip_set_get_extensions(set, tb, &ext);
115         if (ret)
116                 return ret;
117         ether_addr_copy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]));
118         if (is_zero_ether_addr(e.ether))
119                 return -IPSET_ERR_HASH_ELEM;
120 
121         return adtfn(set, &e, &ext, &ext, flags);
122 }
123 
124 static struct ip_set_type hash_mac_type __read_mostly = {
125         .name           = "hash:mac",
126         .protocol       = IPSET_PROTOCOL,
127         .features       = IPSET_TYPE_MAC,
128         .dimension      = IPSET_DIM_ONE,
129         .family         = NFPROTO_UNSPEC,
130         .revision_min   = IPSET_TYPE_REV_MIN,
131         .revision_max   = IPSET_TYPE_REV_MAX,
132         .create         = hash_mac_create,
133         .create_policy  = {
134                 [IPSET_ATTR_HASHSIZE]   = { .type = NLA_U32 },
135                 [IPSET_ATTR_MAXELEM]    = { .type = NLA_U32 },
136                 [IPSET_ATTR_PROBES]     = { .type = NLA_U8 },
137                 [IPSET_ATTR_RESIZE]     = { .type = NLA_U8  },
138                 [IPSET_ATTR_TIMEOUT]    = { .type = NLA_U32 },
139                 [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
140         },
141         .adt_policy     = {
142                 [IPSET_ATTR_ETHER]      = { .type = NLA_BINARY,
143                                             .len  = ETH_ALEN },
144                 [IPSET_ATTR_TIMEOUT]    = { .type = NLA_U32 },
145                 [IPSET_ATTR_LINENO]     = { .type = NLA_U32 },
146                 [IPSET_ATTR_BYTES]      = { .type = NLA_U64 },
147                 [IPSET_ATTR_PACKETS]    = { .type = NLA_U64 },
148                 [IPSET_ATTR_COMMENT]    = { .type = NLA_NUL_STRING,
149                                             .len  = IPSET_MAX_COMMENT_SIZE },
150                 [IPSET_ATTR_SKBMARK]    = { .type = NLA_U64 },
151                 [IPSET_ATTR_SKBPRIO]    = { .type = NLA_U32 },
152                 [IPSET_ATTR_SKBQUEUE]   = { .type = NLA_U16 },
153         },
154         .me             = THIS_MODULE,
155 };
156 
157 static int __init
158 hash_mac_init(void)
159 {
160         return ip_set_type_register(&hash_mac_type);
161 }
162 
163 static void __exit
164 hash_mac_fini(void)
165 {
166         rcu_barrier();
167         ip_set_type_unregister(&hash_mac_type);
168 }
169 
170 module_init(hash_mac_init);
171 module_exit(hash_mac_fini);
172 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp