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