Patrick McHardy
f0ad0860d0
This patch adds support for multiple independant multicast routing instances,
named "tables".
Userspace multicast routing daemons can bind to a specific table instance by
issuing a setsockopt call using a new option MRT_TABLE. The table number is
stored in the raw socket data and affects all following ipmr setsockopt(),
getsockopt() and ioctl() calls. By default, a single table (RT_TABLE_DEFAULT)
is created with a default routing rule pointing to it. Newly created pimreg
devices have the table number appended ("pimregX"), with the exception of
devices created in the default table, which are named just "pimreg" for
compatibility reasons.
Packets are directed to a specific table instance using routing rules,
similar to how regular routing rules work. Currently iif, oif and mark
are supported as keys, source and destination addresses could be supported
additionally.
Example usage:
- bind pimd/xorp/... to a specific table:
uint32_t table = 123;
setsockopt(fd, IPPROTO_IP, MRT_TABLE, &table, sizeof(table));
- create routing rules directing packets to the new table:
# ip mrule add iif eth0 lookup 123
# ip mrule add oif eth0 lookup 123
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the RAW-IP module.
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*
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* Version: @(#)raw.h 1.0.2 05/07/93
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*
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* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _RAW_H
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#define _RAW_H
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#include <net/protocol.h>
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#include <linux/icmp.h>
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extern struct proto raw_prot;
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void raw_icmp_error(struct sk_buff *, int, u32);
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int raw_local_deliver(struct sk_buff *, int);
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extern int raw_rcv(struct sock *, struct sk_buff *);
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#define RAW_HTABLE_SIZE MAX_INET_PROTOS
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struct raw_hashinfo {
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rwlock_t lock;
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struct hlist_head ht[RAW_HTABLE_SIZE];
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};
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#ifdef CONFIG_PROC_FS
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extern int raw_proc_init(void);
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extern void raw_proc_exit(void);
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struct raw_iter_state {
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struct seq_net_private p;
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int bucket;
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struct raw_hashinfo *h;
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};
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#define raw_seq_private(seq) ((struct raw_iter_state *)(seq)->private)
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void *raw_seq_start(struct seq_file *seq, loff_t *pos);
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void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos);
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void raw_seq_stop(struct seq_file *seq, void *v);
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int raw_seq_open(struct inode *ino, struct file *file,
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struct raw_hashinfo *h, const struct seq_operations *ops);
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#endif
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void raw_hash_sk(struct sock *sk);
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void raw_unhash_sk(struct sock *sk);
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struct raw_sock {
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/* inet_sock has to be the first member */
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struct inet_sock inet;
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struct icmp_filter filter;
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u32 ipmr_table;
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};
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static inline struct raw_sock *raw_sk(const struct sock *sk)
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{
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return (struct raw_sock *)sk;
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}
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#endif /* _RAW_H */
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