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>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
#ifndef __LINUX_FIB_RULES_H
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#define __LINUX_FIB_RULES_H
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#include <linux/types.h>
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#include <linux/rtnetlink.h>
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/* rule is permanent, and cannot be deleted */
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#define FIB_RULE_PERMANENT 0x00000001
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#define FIB_RULE_INVERT 0x00000002
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#define FIB_RULE_UNRESOLVED 0x00000004
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#define FIB_RULE_IIF_DETACHED 0x00000008
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#define FIB_RULE_DEV_DETACHED FIB_RULE_IIF_DETACHED
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#define FIB_RULE_OIF_DETACHED 0x00000010
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/* try to find source address in routing lookups */
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#define FIB_RULE_FIND_SADDR 0x00010000
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/* fib_rules families. values up to 127 are reserved for real address
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* families, values above 128 may be used arbitrarily.
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*/
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#define FIB_RULES_IPV4 AF_INET
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#define FIB_RULES_IPV6 AF_INET6
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#define FIB_RULES_DECNET AF_DECnet
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#define FIB_RULES_IPMR 128
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struct fib_rule_hdr {
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__u8 family;
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__u8 dst_len;
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__u8 src_len;
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__u8 tos;
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__u8 table;
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__u8 res1; /* reserved */
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__u8 res2; /* reserved */
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__u8 action;
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__u32 flags;
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};
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enum {
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FRA_UNSPEC,
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FRA_DST, /* destination address */
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FRA_SRC, /* source address */
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FRA_IIFNAME, /* interface name */
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#define FRA_IFNAME FRA_IIFNAME
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FRA_GOTO, /* target to jump to (FR_ACT_GOTO) */
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FRA_UNUSED2,
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FRA_PRIORITY, /* priority/preference */
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FRA_UNUSED3,
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FRA_UNUSED4,
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FRA_UNUSED5,
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FRA_FWMARK, /* mark */
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FRA_FLOW, /* flow/class id */
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FRA_UNUSED6,
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FRA_UNUSED7,
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FRA_UNUSED8,
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FRA_TABLE, /* Extended table id */
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FRA_FWMASK, /* mask for netfilter mark */
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FRA_OIFNAME,
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__FRA_MAX
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};
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#define FRA_MAX (__FRA_MAX - 1)
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enum {
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FR_ACT_UNSPEC,
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FR_ACT_TO_TBL, /* Pass to fixed table */
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FR_ACT_GOTO, /* Jump to another rule */
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FR_ACT_NOP, /* No operation */
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FR_ACT_RES3,
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FR_ACT_RES4,
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FR_ACT_BLACKHOLE, /* Drop without notification */
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FR_ACT_UNREACHABLE, /* Drop with ENETUNREACH */
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FR_ACT_PROHIBIT, /* Drop with EACCES */
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__FR_ACT_MAX,
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};
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#define FR_ACT_MAX (__FR_ACT_MAX - 1)
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#endif
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