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author | bms <bms@FreeBSD.org> | 2007-06-12 16:24:56 +0000 |
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committer | bms <bms@FreeBSD.org> | 2007-06-12 16:24:56 +0000 |
commit | ffd77d9ba5a1376d64ccbb2909a7179c05de81bc (patch) | |
tree | ef2e1b349db858481633196c1f4a1cc9cd67fe16 /sys/netinet/igmp_var.h | |
parent | d4a700c2dc6c55dae07b6ed7fe4d47508632b9f4 (diff) | |
download | FreeBSD-src-ffd77d9ba5a1376d64ccbb2909a7179c05de81bc.zip FreeBSD-src-ffd77d9ba5a1376d64ccbb2909a7179c05de81bc.tar.gz |
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
Diffstat (limited to 'sys/netinet/igmp_var.h')
-rw-r--r-- | sys/netinet/igmp_var.h | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/sys/netinet/igmp_var.h b/sys/netinet/igmp_var.h index aa083a8..11c3769 100644 --- a/sys/netinet/igmp_var.h +++ b/sys/netinet/igmp_var.h @@ -56,6 +56,7 @@ struct igmpstat { u_int igps_rcv_badreports; /* received invalid reports */ u_int igps_rcv_ourreports; /* received reports for our groups */ u_int igps_snd_reports; /* sent membership reports */ + u_int igps_rcv_toolong; /* received with too many bytes */ }; #ifdef _KERNEL @@ -68,12 +69,20 @@ struct igmpstat { #define IGMP_IREPORTEDLAST 1 /* + * State masks for IGMPv3 + */ +#define IGMP_V3_NONEXISTENT 0x01 +#define IGMP_V3_OTHERMEMBER 0x02 +#define IGMP_V3_IREPORTEDLAST 0x04 + +/* * We must remember what version the subnet's querier is. * We conveniently use the IGMP message type for the proper * membership report to keep this state. */ #define IGMP_V1_ROUTER IGMP_V1_MEMBERSHIP_REPORT #define IGMP_V2_ROUTER IGMP_V2_MEMBERSHIP_REPORT +#define IGMP_V3_ROUTER IGMP_V3_MEMBERSHIP_REPORT /* * Revert to new router if we haven't heard from an old router in @@ -81,6 +90,51 @@ struct igmpstat { */ #define IGMP_AGE_THRESHOLD 540 +/* + * IGMPv3 protocol defaults + */ +#define IGMP_INIT_ROBVAR 2 /* Robustness */ +#define IGMP_MAX_ROBVAR 7 +#define IGMP_INIT_QRYINT 125 /* Querier's Query interval */ +#define IGMP_MAX_QRYINT 255 +#define IGMP_INIT_QRYRSP 10 /* Query Response interval */ +#define IGMP_DEF_QRYMRT 10 +#define IGMP_UNSOL_INT 1 /* Unsolicited Report interval */ + +/* + * IGMPv3 report types + */ +#define IGMP_REPORT_MODE_IN 1 /* mode-is-include */ +#define IGMP_REPORT_MODE_EX 2 /* mode-is-exclude */ +#define IGMP_REPORT_TO_IN 3 /* change-to-include */ +#define IGMP_REPORT_TO_EX 4 /* change-to-exclude */ +#define IGMP_REPORT_ALLOW_NEW 5 /* allow-new-sources */ +#define IGMP_REPORT_BLOCK_OLD 6 /* block-old-sources */ + +/* + * Report types + */ +#define IGMP_MASK_CUR_STATE 0x01 /* Report current-state */ +#define IGMP_MASK_ALLOW_NEW 0x02 /* Report source as allow-new */ +#define IGMP_MASK_BLOCK_OLD 0x04 /* Report source as block-old */ +#define IGMP_MASK_TO_IN 0x08 /* Report source as to_in */ +#define IGMP_MASK_TO_EX 0x10 /* Report source as to_ex */ +#define IGMP_MASK_STATE_T1 0x20 /* State at T1 */ +#define IGMP_MASK_STATE_T2 0x40 /* State at T2 */ +#define IGMP_MASK_IF_STATE 0x80 /* Report current-state per interface */ + +#define IGMP_MASK_STATE_TX (IGMP_MASK_STATE_T1 | IGMP_MASK_STATE_T2) +#define IGMP_MASK_PENDING (IGMP_MASK_CUR_STATE | \ + IGMP_MASK_ALLOW_NEW | \ + IGMP_MASK_BLOCK_OLD) + +/* + * List identifiers + */ +#define IGMP_EXCLUDE_LIST 1 /* exclude list used to tag report */ +#define IGMP_INCLUDE_LIST 2 /* include list used to tag report */ +#define IGMP_RECORDED_LIST 3 /* recorded list used to tag report */ + void igmp_init(void); void igmp_input(struct mbuf *, int); void igmp_joingroup(struct in_multi *); @@ -100,6 +154,6 @@ SYSCTL_DECL(_net_inet_igmp); #define IGMPCTL_NAMES { \ { 0, 0 }, \ - { "stats", CTLTYPE_STRUCT }, \ + { "stats", CTLTYPE_STRUCT } \ } #endif |