| 1 | |
| 2 | |
| 3 | * INET An implementation of the TCP/IP protocol suite for the LINUX
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| 4 | * operating system. INET is implemented using the BSD Socket
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| 5 | * interface as the means of communication with the user level.
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| 6 | *
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| 7 | * PF_INET6 protocol dispatch tables.
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| 8 | *
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| 9 | * Authors: Pedro Roque <[email protected]>
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| 10 |
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| 11 |
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| 12 | |
| 13 | * Changes:
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| 14 | *
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| 15 | * Vince Laviano ([email protected]) 16 May 2001
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| 16 | * - Removed unused variable 'inet6_protocol_base'
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| 17 | * - Modified inet6_del_protocol() to correctly maintain copy bit.
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| 18 |
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| 19 | #include <linux/module.h>
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| 20 | #include <linux/netdevice.h>
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| 21 | #include <linux/spinlock.h>
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| 22 | #include <net/protocol.h>
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| 23 |
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| 24 | #if IS_ENABLED(CONFIG_IPV6)
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| 25 | struct inet6_protocol __rcu *inet6_protos[MAX_INET_PROTOS] __read_mostly;
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| 26 | EXPORT_SYMBOL(inet6_protos);
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| 27 |
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| 28 | int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
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| 29 | {
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| 30 | return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
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| 31 | NULL, prot) ? 0 : -1;
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| 32 | }
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| 33 | EXPORT_SYMBOL(inet6_add_protocol);
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| 34 |
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| 35 | int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
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| 36 | {
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| 37 | int ret;
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| 38 |
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| 39 | ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
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| 40 | prot, NULL) == prot) ? 0 : -1;
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| 41 |
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| 42 | synchronize_net();
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| 43 |
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| 44 | return ret;
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| 45 | }
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| 46 | EXPORT_SYMBOL(inet6_del_protocol);
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| 47 | #endif
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| 48 |
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| 49 | const struct net_offload __rcu *inet6_offloads[MAX_INET_PROTOS] __read_mostly;
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| 50 | EXPORT_SYMBOL(inet6_offloads);
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| 51 |
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| 52 | int inet6_add_offload(const struct net_offload *prot, unsigned char protocol)
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| 53 | {
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| 54 | return !cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
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| 55 | NULL, prot) ? 0 : -1;
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| 56 | }
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| 57 | EXPORT_SYMBOL(inet6_add_offload);
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| 58 |
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| 59 | int inet6_del_offload(const struct net_offload *prot, unsigned char protocol)
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| 60 | {
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| 61 | int ret;
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| 62 |
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| 63 | ret = (cmpxchg((const struct net_offload **)&inet6_offloads[protocol],
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| 64 | prot, NULL) == prot) ? 0 : -1;
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| 65 |
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| 66 | synchronize_net();
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| 67 |
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| 68 | return ret;
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| 69 | }
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| 70 | EXPORT_SYMBOL(inet6_del_offload);
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