/* $NetBSD: ntp_net.h,v 1.5 2020/05/25 20:47:19 christos Exp $ */ /* * ntp_net.h - definitions for NTP network stuff */ #ifndef NTP_NET_H #define NTP_NET_H #include #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NET_IF_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_NET_IF_VAR_H #include #endif #ifdef HAVE_NETINET_IN_VAR_H #include #endif #include "ntp_rfc2553.h" #include "ntp_malloc.h" typedef union { struct sockaddr sa; struct sockaddr_in sa4; struct sockaddr_in6 sa6; } sockaddr_u; /* * Utilities for manipulating sockaddr_u v4/v6 unions */ #define SOCK_ADDR4(psau) ((psau)->sa4.sin_addr) #define SOCK_ADDR6(psau) ((psau)->sa6.sin6_addr) #define PSOCK_ADDR4(psau) (&SOCK_ADDR4(psau)) #define PSOCK_ADDR6(psau) (&SOCK_ADDR6(psau)) #define AF(psau) ((psau)->sa.sa_family) #define IS_IPV4(psau) (AF_INET == AF(psau)) #define IS_IPV6(psau) (AF_INET6 == AF(psau)) /* sockaddr_u v4 address in network byte order */ #define NSRCADR(psau) (SOCK_ADDR4(psau).s_addr) /* sockaddr_u v4 address in host byte order */ #define SRCADR(psau) (ntohl(NSRCADR(psau))) /* sockaddr_u v6 address in network byte order */ #define NSRCADR6(psau) (SOCK_ADDR6(psau).s6_addr) /* assign sockaddr_u v4 address from host byte order */ #define SET_ADDR4(psau, addr4) (NSRCADR(psau) = htonl(addr4)) /* assign sockaddr_u v4 address from network byte order */ #define SET_ADDR4N(psau, addr4n) (NSRCADR(psau) = (addr4n)); /* assign sockaddr_u v6 address from network byte order */ #define SET_ADDR6N(psau, s6_addr) \ (SOCK_ADDR6(psau) = (s6_addr)) /* sockaddr_u v4/v6 port in network byte order */ #define NSRCPORT(psau) ((psau)->sa4.sin_port) /* sockaddr_u v4/v6 port in host byte order */ #define SRCPORT(psau) (ntohs(NSRCPORT(psau))) /* assign sockaddr_u v4/v6 port from host byte order */ #define SET_PORT(psau, port) (NSRCPORT(psau) = htons(port)) /* sockaddr_u v6 scope */ #define SCOPE_VAR(psau) ((psau)->sa6.sin6_scope_id) #ifdef ISC_PLATFORM_HAVESCOPEID /* v4/v6 scope (always zero for v4) */ # define SCOPE(psau) (IS_IPV4(psau) \ ? 0 \ : SCOPE_VAR(psau)) /* are two v6 sockaddr_u scopes equal? */ # define SCOPE_EQ(psau1, psau2) \ (SCOPE_VAR(psau1) == SCOPE_VAR(psau2)) /* assign scope if supported */ # define SET_SCOPE(psau, s) \ do \ if (IS_IPV6(psau)) \ SCOPE_VAR(psau) = (s); \ while (0) #else /* ISC_PLATFORM_HAVESCOPEID not defined */ # define SCOPE(psau) (0) # define SCOPE_EQ(psau1, psau2) (1) # define SET_SCOPE(psau, s) do { } while (0) #endif /* ISC_PLATFORM_HAVESCOPEID */ /* v4/v6 is multicast address */ #define IS_MCAST(psau) \ (IS_IPV4(psau) \ ? IN_CLASSD(SRCADR(psau)) \ : IN6_IS_ADDR_MULTICAST(PSOCK_ADDR6(psau))) /* v6 is interface ID scope universal, as with MAC-derived addresses */ #define IS_IID_UNIV(psau) \ (!!(0x02 & NSRCADR6(psau)[8])) #define SIZEOF_INADDR(fam) \ ((AF_INET == (fam)) \ ? sizeof(struct in_addr) \ : sizeof(struct in6_addr)) #define SIZEOF_SOCKADDR(fam) \ ((AF_INET == (fam)) \ ? sizeof(struct sockaddr_in) \ : sizeof(struct sockaddr_in6)) #define SOCKLEN(psau) \ (IS_IPV4(psau) \ ? sizeof((psau)->sa4) \ : sizeof((psau)->sa6)) #define ZERO_SOCK(psau) \ ZERO(*(psau)) /* blast a byte value across sockaddr_u v6 address */ #define MEMSET_ADDR6(psau, v) \ memset((psau)->sa6.sin6_addr.s6_addr, (v), \ sizeof((psau)->sa6.sin6_addr.s6_addr)) #define SET_ONESMASK(psau) \ do { \ if (IS_IPV6(psau)) \ MEMSET_ADDR6((psau), 0xff); \ else \ NSRCADR(psau) = 0xffffffff; \ } while(0) /* zero sockaddr_u, fill in family and all-ones (host) mask */ #define SET_HOSTMASK(psau, family) \ do { \ ZERO_SOCK(psau); \ AF(psau) = (family); \ SET_ONESMASK(psau); \ } while (0) /* * compare two in6_addr returning negative, 0, or positive. * ADDR6_CMP is negative if *pin6A is lower than *pin6B, zero if they * are equal, positive if *pin6A is higher than *pin6B. IN6ADDR_ANY * is the lowest address (128 zero bits). */ #define ADDR6_CMP(pin6A, pin6B) \ memcmp((pin6A)->s6_addr, (pin6B)->s6_addr, \ sizeof(pin6A)->s6_addr) /* compare two in6_addr for equality only */ #if !defined(SYS_WINNT) || !defined(in_addr6) #define ADDR6_EQ(pin6A, pin6B) \ (!ADDR6_CMP(pin6A, pin6B)) #else #define ADDR6_EQ(pin6A, pin6B) \ IN6_ADDR_EQUAL(pin6A, pin6B) #endif /* compare a in6_addr with socket address */ #define S_ADDR6_EQ(psau, pin6) \ ADDR6_EQ(&(psau)->sa6.sin6_addr, pin6) /* are two sockaddr_u's addresses equal? (port excluded) */ #define SOCK_EQ(psau1, psau2) \ ((AF(psau1) != AF(psau2)) \ ? 0 \ : IS_IPV4(psau1) \ ? (NSRCADR(psau1) == NSRCADR(psau2)) \ : (S_ADDR6_EQ((psau1), PSOCK_ADDR6(psau2)) \ && SCOPE_EQ((psau1), (psau2)))) /* are two sockaddr_u's addresses and ports equal? */ #define ADDR_PORT_EQ(psau1, psau2) \ ((NSRCPORT(psau1) != NSRCPORT(psau2) \ ? 0 \ : SOCK_EQ((psau1), (psau2)))) /* is sockaddr_u address unspecified? */ #define SOCK_UNSPEC(psau) \ (IS_IPV4(psau) \ ? !NSRCADR(psau) \ : IN6_IS_ADDR_UNSPECIFIED(PSOCK_ADDR6(psau))) /* just how unspecified do you mean? (scope 0/unspec too) */ #define SOCK_UNSPEC_S(psau) \ (SOCK_UNSPEC(psau) && !SCOPE(psau)) /* choose a default net interface (struct interface) for v4 or v6 */ #define ANY_INTERFACE_BYFAM(family) \ ((AF_INET == family) \ ? any_interface \ : any6_interface) /* choose a default interface for addresses' protocol (addr family) */ #define ANY_INTERFACE_CHOOSE(psau) \ ANY_INTERFACE_BYFAM(AF(psau)) /* * We tell reference clocks from real peers by giving the reference * clocks an address of the form 127.127.t.u, where t is the type and * u is the unit number. We define some of this here since we will need * some sanity checks to make sure this address isn't interpretted as * that of a normal peer. */ #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */ #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */ #define ISREFCLOCKADR(srcadr) \ (IS_IPV4(srcadr) && \ (SRCADR(srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR) /* * Macro for checking for invalid addresses. This is really, really * gross, but is needed so no one configures a host on net 127 now that * we're encouraging it the the configuration file. */ #define LOOPBACKADR 0x7f000001 #define LOOPNETMASK 0xff000000 #define ISBADADR(srcadr) \ (IS_IPV4(srcadr) \ && ((SRCADR(srcadr) & LOOPNETMASK) \ == (LOOPBACKADR & LOOPNETMASK)) \ && SRCADR(srcadr) != LOOPBACKADR) #endif /* NTP_NET_H */