1 /* $NetBSD: ntp_net.h,v 1.1.1.1 2009/12/13 16:54:52 kardel Exp $ */ 2 3 /* 4 * ntp_net.h - definitions for NTP network stuff 5 */ 6 7 #ifndef NTP_NET_H 8 #define NTP_NET_H 9 10 #include <sys/types.h> 11 #ifdef HAVE_SYS_SOCKET_H 12 #include <sys/socket.h> 13 #endif 14 #ifdef HAVE_NETINET_IN_H 15 #include <netinet/in.h> 16 #endif 17 18 #include "ntp_rfc2553.h" 19 20 typedef union { 21 struct sockaddr sa; 22 struct sockaddr_storage sas; 23 struct sockaddr_in sa4; 24 struct sockaddr_in6 sa6; 25 } sockaddr_u; 26 27 /* 28 * Utilities for manipulating sockaddr_u v4/v6 unions 29 */ 30 #define SOCK_ADDR4(psau) ((psau)->sa4.sin_addr) 31 #define SOCK_ADDR6(psau) ((psau)->sa6.sin6_addr) 32 33 #define PSOCK_ADDR4(psau) (&SOCK_ADDR4(psau)) 34 #define PSOCK_ADDR6(psau) (&SOCK_ADDR6(psau)) 35 36 #define AF(psau) ((psau)->sas.ss_family) 37 38 #define IS_IPV4(psau) (AF_INET == AF(psau)) 39 #define IS_IPV6(psau) (AF_INET6 == AF(psau)) 40 41 /* sockaddr_u v4 address in network byte order */ 42 #define NSRCADR(psau) (SOCK_ADDR4(psau).s_addr) 43 44 /* sockaddr_u v4 address in host byte order */ 45 #define SRCADR(psau) (ntohl(NSRCADR(psau))) 46 47 /* sockaddr_u v6 address in network byte order */ 48 #define NSRCADR6(psau) (SOCK_ADDR6(psau).s6_addr) 49 50 /* assign sockaddr_u v4 address from host byte order */ 51 #define SET_ADDR4(psau, addr4) (NSRCADR(psau) = htonl(addr4)) 52 53 /* assign sockaddr_u v4 address from network byte order */ 54 #define SET_ADDR4N(psau, addr4n) (NSRCADR(psau) = (addr4n)); 55 56 /* assign sockaddr_u v6 address from network byte order */ 57 #define SET_ADDR6N(psau, s6_addr) \ 58 (SOCK_ADDR6(psau) = (s6_addr)) 59 60 /* sockaddr_u v4/v6 port in network byte order */ 61 #define NSRCPORT(psau) ((psau)->sa4.sin_port) 62 63 /* sockaddr_u v4/v6 port in host byte order */ 64 #define SRCPORT(psau) (ntohs(NSRCPORT(psau))) 65 66 /* assign sockaddr_u v4/v6 port from host byte order */ 67 #define SET_PORT(psau, port) (NSRCPORT(psau) = htons(port)) 68 69 /* sockaddr_u v6 scope */ 70 #define SCOPE_VAR(psau) ((psau)->sa6.sin6_scope_id) 71 72 #ifdef ISC_PLATFORM_HAVESCOPEID 73 /* v4/v6 scope (always zero for v4) */ 74 # define SCOPE(psau) (IS_IPV4(psau) \ 75 ? 0 \ 76 : SCOPE_VAR(psau)) 77 78 /* are two v6 sockaddr_u scopes equal? */ 79 # define SCOPE_EQ(psau1, psau2) \ 80 (SCOPE_VAR(psau1) == SCOPE_VAR(psau2)) 81 82 /* assign scope if supported */ 83 # define SET_SCOPE(psau, s) \ 84 do \ 85 if (IS_IPV6(psau)) \ 86 SCOPE_VAR(psau) = (s); \ 87 while (0) 88 #else /* ISC_PLATFORM_HAVESCOPEID not defined */ 89 # define SCOPE(psau) (0) 90 # define SCOPE_EQ(psau1, psau2) (1) 91 # define SET_SCOPE(psau, s) do { } while (0) 92 #endif /* ISC_PLATFORM_HAVESCOPEID */ 93 94 /* v4/v6 is multicast address */ 95 #define IS_MCAST(psau) \ 96 (IS_IPV4(psau) \ 97 ? IN_CLASSD(SRCADR(psau)) \ 98 : IN6_IS_ADDR_MULTICAST(PSOCK_ADDR6(psau))) 99 100 #define SIZEOF_SOCKADDR(fam) \ 101 ((AF_INET == (fam)) \ 102 ? sizeof(struct sockaddr_in) \ 103 : sizeof(struct sockaddr_in6)) 104 105 #define SOCKLEN(psau) \ 106 (IS_IPV4(psau) \ 107 ? sizeof((psau)->sa4) \ 108 : sizeof((psau)->sa6)) 109 110 #define ZERO_SOCK(psau) \ 111 memset(&(psau)->sas, 0, sizeof((psau)->sas)) 112 113 /* blast a byte value across sockaddr_u v6 address */ 114 #define MEMSET_ADDR6(psau, v) \ 115 memset((void *)(psau)->sa6.sin6_addr.s6_addr, (v), \ 116 sizeof((psau)->sa6.sin6_addr.s6_addr)) 117 118 #define SET_ONESMASK(psau) \ 119 do { \ 120 if (IS_IPV6(psau)) \ 121 MEMSET_ADDR6((psau), 0xff); \ 122 else \ 123 NSRCADR(psau) = 0xffffffff; \ 124 } while(0) 125 126 /* zero sockaddr_u, fill in family and all-ones (host) mask */ 127 #define SET_HOSTMASK(psau, family) \ 128 do { \ 129 ZERO_SOCK(psau); \ 130 AF(psau) = (family); \ 131 SET_ONESMASK(psau); \ 132 } while (0) 133 134 /* compare a in6_addr with socket address */ 135 #if !defined(SYS_WINNT) || !defined(in_addr6) 136 #define S_ADDR6_EQ(psau, my_in6_addr) \ 137 (!memcmp(&(psau)->sa6.sin6_addr, \ 138 (my_in6_addr), \ 139 sizeof((psau)->sa6.sin6_addr))) 140 #else 141 #define S_ADDR6_EQ(psau, my_in6_addr) \ 142 IN6_ADDR_EQUAL(&(psau)->sa6.sin6_addr, \ 143 (my_in6_addr)) 144 #endif 145 146 /* are two sockaddr_u's addresses equal? */ 147 #define SOCK_EQ(psau1, psau2) \ 148 ((AF(psau1) != AF(psau2)) \ 149 ? 0 \ 150 : IS_IPV4(psau1) \ 151 ? (NSRCADR(psau1) == NSRCADR(psau2)) \ 152 : (S_ADDR6_EQ((psau1), PSOCK_ADDR6(psau2)) \ 153 && SCOPE_EQ((psau1), (psau2)))) 154 155 /* is sockaddr_u address unspecified? */ 156 #define SOCK_UNSPEC(psau) \ 157 (IS_IPV4(psau) \ 158 ? !NSRCADR(psau) \ 159 : IN6_IS_ADDR_UNSPECIFIED(PSOCK_ADDR6(psau))) 160 161 /* just how unspecified do you mean? (scope 0/unspec too) */ 162 #define SOCK_UNSPEC_S(psau) \ 163 (SOCK_UNSPEC(psau) && !SCOPE(psau)) 164 165 /* choose a default net interface (struct interface) for v4 or v6 */ 166 #define ANY_INTERFACE_BYFAM(family) \ 167 ((AF_INET == family) \ 168 ? any_interface \ 169 : any6_interface) 170 171 /* choose a default interface for addresses' protocol (addr family) */ 172 #define ANY_INTERFACE_CHOOSE(psau) \ 173 ANY_INTERFACE_BYFAM(AF(psau)) 174 175 176 /* 177 * We tell reference clocks from real peers by giving the reference 178 * clocks an address of the form 127.127.t.u, where t is the type and 179 * u is the unit number. We define some of this here since we will need 180 * some sanity checks to make sure this address isn't interpretted as 181 * that of a normal peer. 182 */ 183 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */ 184 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */ 185 186 #ifdef REFCLOCK 187 #define ISREFCLOCKADR(srcadr) \ 188 (IS_IPV4(srcadr) && \ 189 (SRCADR(srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR) 190 #else 191 #define ISREFCLOCKADR(srcadr) (0) 192 #endif 193 194 /* 195 * Macro for checking for invalid addresses. This is really, really 196 * gross, but is needed so no one configures a host on net 127 now that 197 * we're encouraging it the the configuration file. 198 */ 199 #define LOOPBACKADR 0x7f000001 200 #define LOOPNETMASK 0xff000000 201 202 #define ISBADADR(srcadr) \ 203 (IS_IPV4(srcadr) \ 204 && ((SRCADR(srcadr) & LOOPNETMASK) \ 205 == (LOOPBACKADR & LOOPNETMASK)) \ 206 && SRCADR(srcadr) != LOOPBACKADR) 207 208 209 #endif /* NTP_NET_H */ 210