1 /* $NetBSD: ntp_net.h,v 1.1.1.2 2012/01/31 21:23:17 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_NET_IF_H 15 #include <net/if.h> 16 #endif 17 #ifdef HAVE_NETINET_IN_H 18 #include <netinet/in.h> 19 #endif 20 #ifdef HAVE_NET_IF_VAR_H 21 #include <net/if_var.h> 22 #endif 23 #ifdef HAVE_NETINET_IN_VAR_H 24 #include <netinet/in_var.h> 25 #endif 26 27 #include "ntp_rfc2553.h" 28 29 typedef union { 30 struct sockaddr sa; 31 struct sockaddr_in sa4; 32 struct sockaddr_in6 sa6; 33 } sockaddr_u; 34 35 /* 36 * Utilities for manipulating sockaddr_u v4/v6 unions 37 */ 38 #define SOCK_ADDR4(psau) ((psau)->sa4.sin_addr) 39 #define SOCK_ADDR6(psau) ((psau)->sa6.sin6_addr) 40 41 #define PSOCK_ADDR4(psau) (&SOCK_ADDR4(psau)) 42 #define PSOCK_ADDR6(psau) (&SOCK_ADDR6(psau)) 43 44 #define AF(psau) ((psau)->sa.sa_family) 45 46 #define IS_IPV4(psau) (AF_INET == AF(psau)) 47 #define IS_IPV6(psau) (AF_INET6 == AF(psau)) 48 49 /* sockaddr_u v4 address in network byte order */ 50 #define NSRCADR(psau) (SOCK_ADDR4(psau).s_addr) 51 52 /* sockaddr_u v4 address in host byte order */ 53 #define SRCADR(psau) (ntohl(NSRCADR(psau))) 54 55 /* sockaddr_u v6 address in network byte order */ 56 #define NSRCADR6(psau) (SOCK_ADDR6(psau).s6_addr) 57 58 /* assign sockaddr_u v4 address from host byte order */ 59 #define SET_ADDR4(psau, addr4) (NSRCADR(psau) = htonl(addr4)) 60 61 /* assign sockaddr_u v4 address from network byte order */ 62 #define SET_ADDR4N(psau, addr4n) (NSRCADR(psau) = (addr4n)); 63 64 /* assign sockaddr_u v6 address from network byte order */ 65 #define SET_ADDR6N(psau, s6_addr) \ 66 (SOCK_ADDR6(psau) = (s6_addr)) 67 68 /* sockaddr_u v4/v6 port in network byte order */ 69 #define NSRCPORT(psau) ((psau)->sa4.sin_port) 70 71 /* sockaddr_u v4/v6 port in host byte order */ 72 #define SRCPORT(psau) (ntohs(NSRCPORT(psau))) 73 74 /* assign sockaddr_u v4/v6 port from host byte order */ 75 #define SET_PORT(psau, port) (NSRCPORT(psau) = htons(port)) 76 77 /* sockaddr_u v6 scope */ 78 #define SCOPE_VAR(psau) ((psau)->sa6.sin6_scope_id) 79 80 #ifdef ISC_PLATFORM_HAVESCOPEID 81 /* v4/v6 scope (always zero for v4) */ 82 # define SCOPE(psau) (IS_IPV4(psau) \ 83 ? 0 \ 84 : SCOPE_VAR(psau)) 85 86 /* are two v6 sockaddr_u scopes equal? */ 87 # define SCOPE_EQ(psau1, psau2) \ 88 (SCOPE_VAR(psau1) == SCOPE_VAR(psau2)) 89 90 /* assign scope if supported */ 91 # define SET_SCOPE(psau, s) \ 92 do \ 93 if (IS_IPV6(psau)) \ 94 SCOPE_VAR(psau) = (s); \ 95 while (0) 96 #else /* ISC_PLATFORM_HAVESCOPEID not defined */ 97 # define SCOPE(psau) (0) 98 # define SCOPE_EQ(psau1, psau2) (1) 99 # define SET_SCOPE(psau, s) do { } while (0) 100 #endif /* ISC_PLATFORM_HAVESCOPEID */ 101 102 /* v4/v6 is multicast address */ 103 #define IS_MCAST(psau) \ 104 (IS_IPV4(psau) \ 105 ? IN_CLASSD(SRCADR(psau)) \ 106 : IN6_IS_ADDR_MULTICAST(PSOCK_ADDR6(psau))) 107 108 /* v6 is interface ID scope universal, as with MAC-derived addresses */ 109 #define IS_IID_UNIV(psau) \ 110 (!!(0x02 & NSRCADR6(psau)[8])) 111 112 #define SIZEOF_INADDR(fam) \ 113 ((AF_INET == (fam)) \ 114 ? sizeof(struct in_addr) \ 115 : sizeof(struct in6_addr)) 116 117 #define SIZEOF_SOCKADDR(fam) \ 118 ((AF_INET == (fam)) \ 119 ? sizeof(struct sockaddr_in) \ 120 : sizeof(struct sockaddr_in6)) 121 122 #define SOCKLEN(psau) \ 123 (IS_IPV4(psau) \ 124 ? sizeof((psau)->sa4) \ 125 : sizeof((psau)->sa6)) 126 127 #define ZERO_SOCK(psau) \ 128 memset((psau), 0, sizeof(*(psau))) 129 130 /* blast a byte value across sockaddr_u v6 address */ 131 #define MEMSET_ADDR6(psau, v) \ 132 memset((psau)->sa6.sin6_addr.s6_addr, (v), \ 133 sizeof((psau)->sa6.sin6_addr.s6_addr)) 134 135 #define SET_ONESMASK(psau) \ 136 do { \ 137 if (IS_IPV6(psau)) \ 138 MEMSET_ADDR6((psau), 0xff); \ 139 else \ 140 NSRCADR(psau) = 0xffffffff; \ 141 } while(0) 142 143 /* zero sockaddr_u, fill in family and all-ones (host) mask */ 144 #define SET_HOSTMASK(psau, family) \ 145 do { \ 146 ZERO_SOCK(psau); \ 147 AF(psau) = (family); \ 148 SET_ONESMASK(psau); \ 149 } while (0) 150 151 /* 152 * compare two in6_addr returning negative, 0, or positive. 153 * ADDR6_CMP is negative if *pin6A is lower than *pin6B, zero if they 154 * are equal, positive if *pin6A is higher than *pin6B. IN6ADDR_ANY 155 * is the lowest address (128 zero bits). 156 */ 157 #define ADDR6_CMP(pin6A, pin6B) \ 158 memcmp((pin6A)->s6_addr, (pin6B)->s6_addr, \ 159 sizeof(pin6A)->s6_addr) 160 161 /* compare two in6_addr for equality only */ 162 #if !defined(SYS_WINNT) || !defined(in_addr6) 163 #define ADDR6_EQ(pin6A, pin6B) \ 164 (!ADDR6_CMP(pin6A, pin6B)) 165 #else 166 #define ADDR6_EQ(pin6A, pin6B) \ 167 IN6_ADDR_EQUAL(pin6A, pin6B) 168 #endif 169 170 /* compare a in6_addr with socket address */ 171 #define S_ADDR6_EQ(psau, pin6) \ 172 ADDR6_EQ(&(psau)->sa6.sin6_addr, pin6) 173 174 /* are two sockaddr_u's addresses equal? (port excluded) */ 175 #define SOCK_EQ(psau1, psau2) \ 176 ((AF(psau1) != AF(psau2)) \ 177 ? 0 \ 178 : IS_IPV4(psau1) \ 179 ? (NSRCADR(psau1) == NSRCADR(psau2)) \ 180 : (S_ADDR6_EQ((psau1), PSOCK_ADDR6(psau2)) \ 181 && SCOPE_EQ((psau1), (psau2)))) 182 183 /* are two sockaddr_u's addresses and ports equal? */ 184 #define ADDR_PORT_EQ(psau1, psau2) \ 185 ((NSRCPORT(psau1) != NSRCPORT(psau2) \ 186 ? 0 \ 187 : SOCK_EQ((psau1), (psau2)))) 188 189 /* is sockaddr_u address unspecified? */ 190 #define SOCK_UNSPEC(psau) \ 191 (IS_IPV4(psau) \ 192 ? !NSRCADR(psau) \ 193 : IN6_IS_ADDR_UNSPECIFIED(PSOCK_ADDR6(psau))) 194 195 /* just how unspecified do you mean? (scope 0/unspec too) */ 196 #define SOCK_UNSPEC_S(psau) \ 197 (SOCK_UNSPEC(psau) && !SCOPE(psau)) 198 199 /* choose a default net interface (struct interface) for v4 or v6 */ 200 #define ANY_INTERFACE_BYFAM(family) \ 201 ((AF_INET == family) \ 202 ? any_interface \ 203 : any6_interface) 204 205 /* choose a default interface for addresses' protocol (addr family) */ 206 #define ANY_INTERFACE_CHOOSE(psau) \ 207 ANY_INTERFACE_BYFAM(AF(psau)) 208 209 210 /* 211 * We tell reference clocks from real peers by giving the reference 212 * clocks an address of the form 127.127.t.u, where t is the type and 213 * u is the unit number. We define some of this here since we will need 214 * some sanity checks to make sure this address isn't interpretted as 215 * that of a normal peer. 216 */ 217 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */ 218 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */ 219 220 #ifdef REFCLOCK 221 #define ISREFCLOCKADR(srcadr) \ 222 (IS_IPV4(srcadr) && \ 223 (SRCADR(srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR) 224 #else 225 #define ISREFCLOCKADR(srcadr) (0) 226 #endif 227 228 /* 229 * Macro for checking for invalid addresses. This is really, really 230 * gross, but is needed so no one configures a host on net 127 now that 231 * we're encouraging it the the configuration file. 232 */ 233 #define LOOPBACKADR 0x7f000001 234 #define LOOPNETMASK 0xff000000 235 236 #define ISBADADR(srcadr) \ 237 (IS_IPV4(srcadr) \ 238 && ((SRCADR(srcadr) & LOOPNETMASK) \ 239 == (LOOPBACKADR & LOOPNETMASK)) \ 240 && SRCADR(srcadr) != LOOPBACKADR) 241 242 243 #endif /* NTP_NET_H */ 244