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4b340a5a72
This patch adds support for MRT6MSG_WRMIFWHOLE which is used to pass full packet and real vif id when the incoming interface is wrong. While the RP and FHR are setting up state we need to be sending the registers encapsulated with all the data inside otherwise we lose it. The RP then decapsulates it and forwards it to the interested parties. Currently with WRONGMIF we can only be sending empty register packets and will lose that data. This behaviour can be enabled by using MRT_PIM with val == MRT6MSG_WRMIFWHOLE. This doesn't prevent MRT6MSG_WRONGMIF from happening, it happens in addition to it, also it is controlled by the same throttling parameters as WRONGMIF (i.e. 1 packet per 3 seconds currently). Both messages are generated to keep backwards compatibily and avoid breaking someone who was enabling MRT_PIM with val == 4, since any positive val is accepted and treated the same. Signed-off-by: Mobashshera Rasool <mobash.rasool.linux@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
157 lines
4.9 KiB
C
157 lines
4.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI__LINUX_MROUTE6_H
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#define _UAPI__LINUX_MROUTE6_H
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#include <linux/const.h>
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#include <linux/types.h>
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#include <linux/sockios.h>
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#include <linux/in6.h> /* For struct sockaddr_in6. */
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/*
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* Based on the MROUTING 3.5 defines primarily to keep
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* source compatibility with BSD.
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*
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* See the pim6sd code for the original history.
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*
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* Protocol Independent Multicast (PIM) data structures included
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* Carlos Picoto (cap@di.fc.ul.pt)
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*
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*/
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#define MRT6_BASE 200
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#define MRT6_INIT (MRT6_BASE) /* Activate the kernel mroute code */
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#define MRT6_DONE (MRT6_BASE+1) /* Shutdown the kernel mroute */
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#define MRT6_ADD_MIF (MRT6_BASE+2) /* Add a virtual interface */
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#define MRT6_DEL_MIF (MRT6_BASE+3) /* Delete a virtual interface */
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#define MRT6_ADD_MFC (MRT6_BASE+4) /* Add a multicast forwarding entry */
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#define MRT6_DEL_MFC (MRT6_BASE+5) /* Delete a multicast forwarding entry */
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#define MRT6_VERSION (MRT6_BASE+6) /* Get the kernel multicast version */
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#define MRT6_ASSERT (MRT6_BASE+7) /* Activate PIM assert mode */
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#define MRT6_PIM (MRT6_BASE+8) /* enable PIM code */
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#define MRT6_TABLE (MRT6_BASE+9) /* Specify mroute table ID */
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#define MRT6_ADD_MFC_PROXY (MRT6_BASE+10) /* Add a (*,*|G) mfc entry */
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#define MRT6_DEL_MFC_PROXY (MRT6_BASE+11) /* Del a (*,*|G) mfc entry */
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#define MRT6_FLUSH (MRT6_BASE+12) /* Flush all mfc entries and/or vifs */
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#define MRT6_MAX (MRT6_BASE+12)
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#define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
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#define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
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#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
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/* MRT6_FLUSH optional flags */
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#define MRT6_FLUSH_MFC 1 /* Flush multicast entries */
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#define MRT6_FLUSH_MFC_STATIC 2 /* Flush static multicast entries */
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#define MRT6_FLUSH_MIFS 4 /* Flushing multicast vifs */
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#define MRT6_FLUSH_MIFS_STATIC 8 /* Flush static multicast vifs */
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#define MAXMIFS 32
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typedef unsigned long mifbitmap_t; /* User mode code depends on this lot */
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typedef unsigned short mifi_t;
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#define ALL_MIFS ((mifi_t)(-1))
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#ifndef IF_SETSIZE
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#define IF_SETSIZE 256
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#endif
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typedef __u32 if_mask;
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#define NIFBITS (sizeof(if_mask) * 8) /* bits per mask */
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typedef struct if_set {
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if_mask ifs_bits[__KERNEL_DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
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} if_set;
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#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
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#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
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#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
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#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
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#define IF_ZERO(p) bzero(p, sizeof(*(p)))
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/*
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* Passed by mrouted for an MRT_ADD_MIF - again we use the
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* mrouted 3.6 structures for compatibility
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*/
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struct mif6ctl {
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mifi_t mif6c_mifi; /* Index of MIF */
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unsigned char mif6c_flags; /* MIFF_ flags */
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unsigned char vifc_threshold; /* ttl limit */
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__u16 mif6c_pifi; /* the index of the physical IF */
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unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
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};
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#define MIFF_REGISTER 0x1 /* register vif */
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/*
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* Cache manipulation structures for mrouted and PIMd
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*/
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struct mf6cctl {
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struct sockaddr_in6 mf6cc_origin; /* Origin of mcast */
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struct sockaddr_in6 mf6cc_mcastgrp; /* Group in question */
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mifi_t mf6cc_parent; /* Where it arrived */
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struct if_set mf6cc_ifset; /* Where it is going */
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};
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/*
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* Group count retrieval for pim6sd
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*/
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struct sioc_sg_req6 {
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struct sockaddr_in6 src;
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struct sockaddr_in6 grp;
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unsigned long pktcnt;
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unsigned long bytecnt;
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unsigned long wrong_if;
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};
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/*
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* To get vif packet counts
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*/
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struct sioc_mif_req6 {
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mifi_t mifi; /* Which iface */
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unsigned long icount; /* In packets */
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unsigned long ocount; /* Out packets */
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unsigned long ibytes; /* In bytes */
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unsigned long obytes; /* Out bytes */
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};
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/*
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* That's all usermode folks
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*/
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/*
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* Structure used to communicate from kernel to multicast router.
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* We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
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* used for IPv4 implementation). This is because this structure will be passed via an
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* IPv6 raw socket, on which an application will only receiver the payload i.e the data after
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* the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
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*/
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struct mrt6msg {
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#define MRT6MSG_NOCACHE 1
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#define MRT6MSG_WRONGMIF 2
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#define MRT6MSG_WHOLEPKT 3 /* used for use level encap */
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#define MRT6MSG_WRMIFWHOLE 4 /* For PIM Register and assert processing */
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__u8 im6_mbz; /* must be zero */
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__u8 im6_msgtype; /* what type of message */
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__u16 im6_mif; /* mif rec'd on */
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__u32 im6_pad; /* padding for 64 bit arch */
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struct in6_addr im6_src, im6_dst;
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};
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/* ip6mr netlink cache report attributes */
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enum {
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IP6MRA_CREPORT_UNSPEC,
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IP6MRA_CREPORT_MSGTYPE,
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IP6MRA_CREPORT_MIF_ID,
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IP6MRA_CREPORT_SRC_ADDR,
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IP6MRA_CREPORT_DST_ADDR,
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IP6MRA_CREPORT_PKT,
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__IP6MRA_CREPORT_MAX
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};
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#define IP6MRA_CREPORT_MAX (__IP6MRA_CREPORT_MAX - 1)
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#endif /* _UAPI__LINUX_MROUTE6_H */
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