ia64/linux-2.6.18-xen.hg

view net/netfilter/xt_esp.c @ 871:9cbcc9008446

xen/x86: don't initialize cpu_data[]'s apicid field on generic code

Afaict, this is not only redundant with the intialization done in
drivers/xen/core/smpboot.c, but actually results - at least for
secondary CPUs - in the Xen-specific value written to be later
overwritten with whatever the generic code determines (with no
guarantee that the two values are identical).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu May 14 10:09:15 2009 +0100 (2009-05-14)
parents 831230e53067
children
line source
1 /* Kernel module to match ESP parameters. */
3 /* (C) 1999-2000 Yon Uriarte <yon@astaro.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
10 #include <linux/module.h>
11 #include <linux/skbuff.h>
12 #include <linux/in.h>
13 #include <linux/ip.h>
15 #include <linux/netfilter/xt_esp.h>
16 #include <linux/netfilter/x_tables.h>
18 #include <linux/netfilter_ipv4/ip_tables.h>
19 #include <linux/netfilter_ipv6/ip6_tables.h>
21 MODULE_LICENSE("GPL");
22 MODULE_AUTHOR("Yon Uriarte <yon@astaro.de>");
23 MODULE_DESCRIPTION("x_tables ESP SPI match module");
24 MODULE_ALIAS("ipt_esp");
25 MODULE_ALIAS("ip6t_esp");
27 #if 0
28 #define duprintf(format, args...) printk(format , ## args)
29 #else
30 #define duprintf(format, args...)
31 #endif
33 /* Returns 1 if the spi is matched by the range, 0 otherwise */
34 static inline int
35 spi_match(u_int32_t min, u_int32_t max, u_int32_t spi, int invert)
36 {
37 int r = 0;
38 duprintf("esp spi_match:%c 0x%x <= 0x%x <= 0x%x", invert ? '!' : ' ',
39 min, spi, max);
40 r = (spi >= min && spi <= max) ^ invert;
41 duprintf(" result %s\n", r ? "PASS" : "FAILED");
42 return r;
43 }
45 static int
46 match(const struct sk_buff *skb,
47 const struct net_device *in,
48 const struct net_device *out,
49 const struct xt_match *match,
50 const void *matchinfo,
51 int offset,
52 unsigned int protoff,
53 int *hotdrop)
54 {
55 struct ip_esp_hdr _esp, *eh;
56 const struct xt_esp *espinfo = matchinfo;
58 /* Must not be a fragment. */
59 if (offset)
60 return 0;
62 eh = skb_header_pointer(skb, protoff, sizeof(_esp), &_esp);
63 if (eh == NULL) {
64 /* We've been asked to examine this packet, and we
65 * can't. Hence, no choice but to drop.
66 */
67 duprintf("Dropping evil ESP tinygram.\n");
68 *hotdrop = 1;
69 return 0;
70 }
72 return spi_match(espinfo->spis[0], espinfo->spis[1], ntohl(eh->spi),
73 !!(espinfo->invflags & XT_ESP_INV_SPI));
74 }
76 /* Called when user tries to insert an entry of this type. */
77 static int
78 checkentry(const char *tablename,
79 const void *ip_void,
80 const struct xt_match *match,
81 void *matchinfo,
82 unsigned int matchinfosize,
83 unsigned int hook_mask)
84 {
85 const struct xt_esp *espinfo = matchinfo;
87 if (espinfo->invflags & ~XT_ESP_INV_MASK) {
88 duprintf("xt_esp: unknown flags %X\n", espinfo->invflags);
89 return 0;
90 }
92 return 1;
93 }
95 static struct xt_match esp_match = {
96 .name = "esp",
97 .family = AF_INET,
98 .proto = IPPROTO_ESP,
99 .match = &match,
100 .matchsize = sizeof(struct xt_esp),
101 .checkentry = &checkentry,
102 .me = THIS_MODULE,
103 };
105 static struct xt_match esp6_match = {
106 .name = "esp",
107 .family = AF_INET6,
108 .proto = IPPROTO_ESP,
109 .match = &match,
110 .matchsize = sizeof(struct xt_esp),
111 .checkentry = &checkentry,
112 .me = THIS_MODULE,
113 };
115 static int __init xt_esp_init(void)
116 {
117 int ret;
118 ret = xt_register_match(&esp_match);
119 if (ret)
120 return ret;
122 ret = xt_register_match(&esp6_match);
123 if (ret)
124 xt_unregister_match(&esp_match);
126 return ret;
127 }
129 static void __exit xt_esp_cleanup(void)
130 {
131 xt_unregister_match(&esp_match);
132 xt_unregister_match(&esp6_match);
133 }
135 module_init(xt_esp_init);
136 module_exit(xt_esp_cleanup);