URL https://opencores.org/ocsvn/test_project/test_project/trunk

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [ipv4/] [tunnel4.c] - Blame information for rev 62

Details | Compare with Previous | View Log


/* tunnel4.c: Generic IP tunnel transformer.
 *
 * Copyright (C) 2003 David S. Miller (davem@redhat.com)
 */
 
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/icmp.h>
#include <net/ip.h>
#include <net/protocol.h>
#include <net/xfrm.h>
 
static struct xfrm_tunnel *tunnel4_handlers;
static struct xfrm_tunnel *tunnel64_handlers;
static DEFINE_MUTEX(tunnel4_mutex);
 
static inline struct xfrm_tunnel **fam_handlers(unsigned short family)
{
        return (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;
}
 
int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family)
{
        struct xfrm_tunnel **pprev;
        int ret = -EEXIST;
        int priority = handler->priority;
 
        mutex_lock(&tunnel4_mutex);
 
        for (pprev = fam_handlers(family); *pprev; pprev = &(*pprev)->next) {
                if ((*pprev)->priority > priority)
                        break;
                if ((*pprev)->priority == priority)
                        goto err;
        }
 
        handler->next = *pprev;
        *pprev = handler;
 
        ret = 0;
 
err:
        mutex_unlock(&tunnel4_mutex);
 
        return ret;
}
 
EXPORT_SYMBOL(xfrm4_tunnel_register);
 
int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family)
{
        struct xfrm_tunnel **pprev;
        int ret = -ENOENT;
 
        mutex_lock(&tunnel4_mutex);
 
        for (pprev = fam_handlers(family); *pprev; pprev = &(*pprev)->next) {
                if (*pprev == handler) {
                        *pprev = handler->next;
                        ret = 0;
                        break;
                }
        }
 
        mutex_unlock(&tunnel4_mutex);
 
        synchronize_net();
 
        return ret;
}
 
EXPORT_SYMBOL(xfrm4_tunnel_deregister);
 
static int tunnel4_rcv(struct sk_buff *skb)
{
        struct xfrm_tunnel *handler;
 
        if (!pskb_may_pull(skb, sizeof(struct iphdr)))
                goto drop;
 
        for (handler = tunnel4_handlers; handler; handler = handler->next)
                if (!handler->handler(skb))
                        return 0;
 
        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
 
drop:
        kfree_skb(skb);
        return 0;
}
 
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static int tunnel64_rcv(struct sk_buff *skb)
{
        struct xfrm_tunnel *handler;
 
        if (!pskb_may_pull(skb, sizeof(struct iphdr)))
                goto drop;
 
        for (handler = tunnel64_handlers; handler; handler = handler->next)
                if (!handler->handler(skb))
                        return 0;
 
        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
 
drop:
        kfree_skb(skb);
        return 0;
}
#endif
 
static void tunnel4_err(struct sk_buff *skb, u32 info)
{
        struct xfrm_tunnel *handler;
 
        for (handler = tunnel4_handlers; handler; handler = handler->next)
                if (!handler->err_handler(skb, info))
                        break;
}
 
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static void tunnel64_err(struct sk_buff *skb, u32 info)
{
        struct xfrm_tunnel *handler;
 
        for (handler = tunnel64_handlers; handler; handler = handler->next)
                if (!handler->err_handler(skb, info))
                        break;
}
#endif
 
static struct net_protocol tunnel4_protocol = {
        .handler        =       tunnel4_rcv,
        .err_handler    =       tunnel4_err,
        .no_policy      =       1,
};
 
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static struct net_protocol tunnel64_protocol = {
        .handler        =       tunnel64_rcv,
        .err_handler    =       tunnel64_err,
        .no_policy      =       1,
};
#endif
 
static int __init tunnel4_init(void)
{
        if (inet_add_protocol(&tunnel4_protocol, IPPROTO_IPIP)) {
                printk(KERN_ERR "tunnel4 init: can't add protocol\n");
                return -EAGAIN;
        }
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
        if (inet_add_protocol(&tunnel64_protocol, IPPROTO_IPV6)) {
                printk(KERN_ERR "tunnel64 init: can't add protocol\n");
                inet_del_protocol(&tunnel4_protocol, IPPROTO_IPIP);
                return -EAGAIN;
        }
#endif
        return 0;
}
 
static void __exit tunnel4_fini(void)
{
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
        if (inet_del_protocol(&tunnel64_protocol, IPPROTO_IPV6))
                printk(KERN_ERR "tunnel64 close: can't remove protocol\n");
#endif
        if (inet_del_protocol(&tunnel4_protocol, IPPROTO_IPIP))
                printk(KERN_ERR "tunnel4 close: can't remove protocol\n");
}
 
module_init(tunnel4_init);
module_exit(tunnel4_fini);
MODULE_LICENSE("GPL");

Line No.	Rev	Author	Line
1	62	marcus.erl	`/* tunnel4.c: Generic IP tunnel transformer.`
2			`*`
3			`* Copyright (C) 2003 David S. Miller (davem@redhat.com)`
4			`*/`
5
6			`#include <linux/init.h>`
7			`#include <linux/module.h>`
8			`#include <linux/mutex.h>`
9			`#include <linux/netdevice.h>`
10			`#include <linux/skbuff.h>`
11			`#include <net/icmp.h>`
12			`#include <net/ip.h>`
13			`#include <net/protocol.h>`
14			`#include <net/xfrm.h>`
15
16			`static struct xfrm_tunnel *tunnel4_handlers;`
17			`static struct xfrm_tunnel *tunnel64_handlers;`
18			`static DEFINE_MUTEX(tunnel4_mutex);`
19
20			`static inline struct xfrm_tunnel **fam_handlers(unsigned short family)`
21			`{`
22			`return (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;`
23			`}`
24
25			`int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family)`
26			`{`
27			`struct xfrm_tunnel **pprev;`
28			`int ret = -EEXIST;`
29			`int priority = handler->priority;`
30
31			`mutex_lock(&tunnel4_mutex);`
32
33			`for (pprev = fam_handlers(family); pprev; pprev = &(pprev)->next) {`
34			`if ((*pprev)->priority > priority)`
35			`break;`
36			`if ((*pprev)->priority == priority)`
37			`goto err;`
38			`}`
39
40			`handler->next = *pprev;`
41			`*pprev = handler;`
42
43			`ret = 0;`
44
45			`err:`
46			`mutex_unlock(&tunnel4_mutex);`
47
48			`return ret;`
49			`}`
50
51			`EXPORT_SYMBOL(xfrm4_tunnel_register);`
52
53			`int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family)`
54			`{`
55			`struct xfrm_tunnel **pprev;`
56			`int ret = -ENOENT;`
57
58			`mutex_lock(&tunnel4_mutex);`
59
60			`for (pprev = fam_handlers(family); pprev; pprev = &(pprev)->next) {`
61			`if (*pprev == handler) {`
62			`*pprev = handler->next;`
63			`ret = 0;`
64			`break;`
65			`}`
66			`}`
67
68			`mutex_unlock(&tunnel4_mutex);`
69
70			`synchronize_net();`
71
72			`return ret;`
73			`}`
74
75			`EXPORT_SYMBOL(xfrm4_tunnel_deregister);`
76
77			`static int tunnel4_rcv(struct sk_buff *skb)`
78			`{`
79			`struct xfrm_tunnel *handler;`
80
81			`if (!pskb_may_pull(skb, sizeof(struct iphdr)))`
82			`goto drop;`
83
84			`for (handler = tunnel4_handlers; handler; handler = handler->next)`
85			`if (!handler->handler(skb))`
86			`return 0;`
87
88			`icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);`
89
90			`drop:`
91			`kfree_skb(skb);`
92			`return 0;`
93			`}`
94
95			`#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)`
96			`static int tunnel64_rcv(struct sk_buff *skb)`
97			`{`
98			`struct xfrm_tunnel *handler;`
99
100			`if (!pskb_may_pull(skb, sizeof(struct iphdr)))`
101			`goto drop;`
102
103			`for (handler = tunnel64_handlers; handler; handler = handler->next)`
104			`if (!handler->handler(skb))`
105			`return 0;`
106
107			`icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);`
108
109			`drop:`
110			`kfree_skb(skb);`
111			`return 0;`
112			`}`
113			`#endif`
114
115			`static void tunnel4_err(struct sk_buff *skb, u32 info)`
116			`{`
117			`struct xfrm_tunnel *handler;`
118
119			`for (handler = tunnel4_handlers; handler; handler = handler->next)`
120			`if (!handler->err_handler(skb, info))`
121			`break;`
122			`}`
123
124			`#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)`
125			`static void tunnel64_err(struct sk_buff *skb, u32 info)`
126			`{`
127			`struct xfrm_tunnel *handler;`
128
129			`for (handler = tunnel64_handlers; handler; handler = handler->next)`
130			`if (!handler->err_handler(skb, info))`
131			`break;`
132			`}`
133			`#endif`
134
135			`static struct net_protocol tunnel4_protocol = {`
136			`.handler = tunnel4_rcv,`
137			`.err_handler = tunnel4_err,`
138			`.no_policy = 1,`
139			`};`
140
141			`#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)`
142			`static struct net_protocol tunnel64_protocol = {`
143			`.handler = tunnel64_rcv,`
144			`.err_handler = tunnel64_err,`
145			`.no_policy = 1,`
146			`};`
147			`#endif`
148
149			`static int __init tunnel4_init(void)`
150			`{`
151			`if (inet_add_protocol(&tunnel4_protocol, IPPROTO_IPIP)) {`
152			`printk(KERN_ERR "tunnel4 init: can't add protocol\n");`
153			`return -EAGAIN;`
154			`}`
155			`#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)`
156			`if (inet_add_protocol(&tunnel64_protocol, IPPROTO_IPV6)) {`
157			`printk(KERN_ERR "tunnel64 init: can't add protocol\n");`
158			`inet_del_protocol(&tunnel4_protocol, IPPROTO_IPIP);`
159			`return -EAGAIN;`
160			`}`
161			`#endif`
162			`return 0;`
163			`}`
164
165			`static void __exit tunnel4_fini(void)`
166			`{`
167			`#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)`
168			`if (inet_del_protocol(&tunnel64_protocol, IPPROTO_IPV6))`
169			`printk(KERN_ERR "tunnel64 close: can't remove protocol\n");`
170			`#endif`
171			`if (inet_del_protocol(&tunnel4_protocol, IPPROTO_IPIP))`
172			`printk(KERN_ERR "tunnel4 close: can't remove protocol\n");`
173			`}`
174
175			`module_init(tunnel4_init);`
176			`module_exit(tunnel4_fini);`
177			`MODULE_LICENSE("GPL");`

Browse

Tools

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [ipv4/] [tunnel4.c] - Blame information for rev 62