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/*
* ntp_net.h - definitions for NTP network stuff
*/
#ifndef GUARD_NTP_NET_H
#define GUARD_NTP_NET_H
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netdb.h>
#include "isc_netaddr.h"
#include "ntp_malloc.h"
typedef union { /* On Linux, these come from: */
struct sockaddr sa; /* /usr/include/bits/socket.h */
struct sockaddr_in sa4; /* /usr/include/linux/in.h */
struct sockaddr_in6 sa6; /* /usr/include/linux/in6.h */
} sockaddr_u;
/*
* Utilities for manipulating sockaddr_u v4/v6 unions
*/
#define SOCK_ADDR4(psau) ((psau)->sa4.sin_addr)
#define SET_SOCK_ADDR4(psau, a) ((psau)->sa4.sin_addr = (a))
#define SOCK_ADDR6(psau) ((psau)->sa6.sin6_addr)
#define SET_SOCK_ADDR6(psau, a) ((psau)->sa6.sin6_addr = (a))
#define PSOCK_ADDR4(psau) (&SOCK_ADDR4(psau))
#define PSOCK_ADDR6(psau) (&SOCK_ADDR6(psau))
#define AF(psau) ((psau)->sa.sa_family)
#define SET_AF(psau, f) ((psau)->sa.sa_family = (f))
#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)
#define SET_NSRCADR(psau, a) (SOCK_ADDR4(psau).s_addr - (a))
/* 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)
#define SET_NSRCADR6(psau) (SOCK_ADDR6(psau).s6_addr = (a))
/* 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)
#define SET_NSRCPORT(psau, a) ((psau)->sa4.sin_port = (a))
/* 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)
/* 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)
/* 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 */
#define ADDR6_EQ(pin6A, pin6B) \
(!ADDR6_CMP(pin6A, pin6B))
/* 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 (endpt) for v4 or v6 */
#define ANY_INTERFACE_BYFAM(family) \
((AF_INET == family) \
? io_data.any_interface \
: io_data.any6_interface)
/* choose a default interface for addresses' protocol (addr family) */
#define ANY_INTERFACE_CHOOSE(psau) \
ANY_INTERFACE_BYFAM(AF(psau))
/*
* 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 configuration file.
*/
#define LOOPBACKADR 0x7f000001
#define LOOPNETMASK 0xff000000
#define ISBADADR(srcadr) \
(IS_IPV4(srcadr) \
&& ((SRCADR(srcadr) & LOOPNETMASK) \
== (LOOPBACKADR & LOOPNETMASK)) \
&& SRCADR(srcadr) != LOOPBACKADR)
#endif /* GUARD_NTP_NET_H */
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