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/*
* PIM address generalizations
* Copyright (C) 2022 David Lamparter for NetDEF, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PIMD_PIM_ADDR_H
#define _PIMD_PIM_ADDR_H
#include "jhash.h"
#include "prefix.h"
/* clang-format off */
#if PIM_IPV == 4
typedef struct in_addr pim_addr;
#define PIM_ADDRSTRLEN INET_ADDRSTRLEN
#define PIM_AF AF_INET
#define PIM_AFI AFI_IP
#define PIM_PROTO_REG IPPROTO_RAW
#define PIM_IPADDR IPADDR_V4
#define ipaddr_pim ipaddr_v4
#define PIM_MAX_BITLEN IPV4_MAX_BITLEN
#define PIM_AF_NAME "ip"
#define PIM_AF_DBG "pim"
#define PIM_MROUTE_DBG "mroute"
#define PIMREG "pimreg"
#define GM "IGMP"
#define PIM_ADDR_FUNCNAME(name) ipv4_##name
union pimprefixptr {
prefixtype(pimprefixptr, struct prefix, p)
prefixtype(pimprefixptr, struct prefix_ipv4, p4)
} TRANSPARENT_UNION;
union pimprefixconstptr {
prefixtype(pimprefixconstptr, const struct prefix, p)
prefixtype(pimprefixconstptr, const struct prefix_ipv4, p4)
} TRANSPARENT_UNION;
#else
typedef struct in6_addr pim_addr;
#define PIM_ADDRSTRLEN INET6_ADDRSTRLEN
#define PIM_AF AF_INET6
#define PIM_AFI AFI_IP6
#define PIM_PROTO_REG IPPROTO_PIM
#define PIM_IPADDR IPADDR_V6
#define ipaddr_pim ipaddr_v6
#define PIM_MAX_BITLEN IPV6_MAX_BITLEN
#define PIM_AF_NAME "ipv6"
#define PIM_AF_DBG "pimv6"
#define PIM_MROUTE_DBG "mroute6"
#define PIMREG "pim6reg"
#define GM "MLD"
#define PIM_ADDR_FUNCNAME(name) ipv6_##name
union pimprefixptr {
prefixtype(pimprefixptr, struct prefix, p)
prefixtype(pimprefixptr, struct prefix_ipv6, p6)
} TRANSPARENT_UNION;
union pimprefixconstptr {
prefixtype(pimprefixconstptr, const struct prefix, p)
prefixtype(pimprefixconstptr, const struct prefix_ipv6, p6)
} TRANSPARENT_UNION;
#endif
/* for assignment/initialization (C99 compound literal)
* named PIMADDR_ANY (not PIM_ADDR_ANY) to match INADDR_ANY
*/
#define PIMADDR_ANY (pim_addr){ }
/* clang-format on */
static inline bool pim_addr_is_any(pim_addr addr)
{
pim_addr zero = {};
return memcmp(&addr, &zero, sizeof(zero)) == 0;
}
static inline int pim_addr_cmp(pim_addr a, pim_addr b)
{
return memcmp(&a, &b, sizeof(a));
}
static inline void pim_addr_to_prefix(union pimprefixptr out, pim_addr in)
{
out.p->family = PIM_AF;
out.p->prefixlen = PIM_MAX_BITLEN;
memcpy(out.p->u.val, &in, sizeof(in));
}
static inline pim_addr pim_addr_from_prefix(union pimprefixconstptr in)
{
pim_addr ret;
if (in.p->family != PIM_AF)
return PIMADDR_ANY;
memcpy(&ret, in.p->u.val, sizeof(ret));
return ret;
}
static inline uint8_t pim_addr_scope(const pim_addr addr)
{
return PIM_ADDR_FUNCNAME(mcast_scope)(&addr);
}
static inline bool pim_addr_nofwd(const pim_addr addr)
{
return PIM_ADDR_FUNCNAME(mcast_nofwd)(&addr);
}
static inline bool pim_addr_ssm(const pim_addr addr)
{
return PIM_ADDR_FUNCNAME(mcast_ssm)(&addr);
}
/* don't use this struct directly, use the pim_sgaddr typedef */
struct _pim_sgaddr {
pim_addr grp;
pim_addr src;
};
typedef struct _pim_sgaddr pim_sgaddr;
static inline int pim_sgaddr_cmp(const pim_sgaddr a, const pim_sgaddr b)
{
/* memcmp over the entire struct = memcmp(grp) + memcmp(src) */
return memcmp(&a, &b, sizeof(a));
}
static inline uint32_t pim_sgaddr_hash(const pim_sgaddr a, uint32_t initval)
{
return jhash2((uint32_t *)&a, sizeof(a) / sizeof(uint32_t), initval);
}
#ifdef _FRR_ATTRIBUTE_PRINTFRR
#pragma FRR printfrr_ext "%pPA" (pim_addr *)
#pragma FRR printfrr_ext "%pSG" (pim_sgaddr *)
#endif
/*
* There is no pim_sgaddr2str(). This is intentional. Instead, use:
* snprintfrr(buf, sizeof(buf), "%pPA", sgaddr)
* (and note that snprintfrr is implicit for vty_out and zlog_*)
*/
#endif /* _PIMD_PIM_ADDR_H */
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