Annotation of embedaddon/ntp/include/ntp_net.h, revision 1.1
1.1 ! misho 1: /*
! 2: * ntp_net.h - definitions for NTP network stuff
! 3: */
! 4:
! 5: #ifndef NTP_NET_H
! 6: #define NTP_NET_H
! 7:
! 8: #include <sys/types.h>
! 9: #ifdef HAVE_SYS_SOCKET_H
! 10: #include <sys/socket.h>
! 11: #endif
! 12: #ifdef HAVE_NET_IF_H
! 13: #include <net/if.h>
! 14: #endif
! 15: #ifdef HAVE_NETINET_IN_H
! 16: #include <netinet/in.h>
! 17: #endif
! 18: #ifdef HAVE_NET_IF_VAR_H
! 19: #include <net/if_var.h>
! 20: #endif
! 21: #ifdef HAVE_NETINET_IN_VAR_H
! 22: #include <netinet/in_var.h>
! 23: #endif
! 24:
! 25: #include "ntp_rfc2553.h"
! 26:
! 27: typedef union {
! 28: struct sockaddr sa;
! 29: struct sockaddr_in sa4;
! 30: struct sockaddr_in6 sa6;
! 31: } sockaddr_u;
! 32:
! 33: /*
! 34: * Utilities for manipulating sockaddr_u v4/v6 unions
! 35: */
! 36: #define SOCK_ADDR4(psau) ((psau)->sa4.sin_addr)
! 37: #define SOCK_ADDR6(psau) ((psau)->sa6.sin6_addr)
! 38:
! 39: #define PSOCK_ADDR4(psau) (&SOCK_ADDR4(psau))
! 40: #define PSOCK_ADDR6(psau) (&SOCK_ADDR6(psau))
! 41:
! 42: #define AF(psau) ((psau)->sa.sa_family)
! 43:
! 44: #define IS_IPV4(psau) (AF_INET == AF(psau))
! 45: #define IS_IPV6(psau) (AF_INET6 == AF(psau))
! 46:
! 47: /* sockaddr_u v4 address in network byte order */
! 48: #define NSRCADR(psau) (SOCK_ADDR4(psau).s_addr)
! 49:
! 50: /* sockaddr_u v4 address in host byte order */
! 51: #define SRCADR(psau) (ntohl(NSRCADR(psau)))
! 52:
! 53: /* sockaddr_u v6 address in network byte order */
! 54: #define NSRCADR6(psau) (SOCK_ADDR6(psau).s6_addr)
! 55:
! 56: /* assign sockaddr_u v4 address from host byte order */
! 57: #define SET_ADDR4(psau, addr4) (NSRCADR(psau) = htonl(addr4))
! 58:
! 59: /* assign sockaddr_u v4 address from network byte order */
! 60: #define SET_ADDR4N(psau, addr4n) (NSRCADR(psau) = (addr4n));
! 61:
! 62: /* assign sockaddr_u v6 address from network byte order */
! 63: #define SET_ADDR6N(psau, s6_addr) \
! 64: (SOCK_ADDR6(psau) = (s6_addr))
! 65:
! 66: /* sockaddr_u v4/v6 port in network byte order */
! 67: #define NSRCPORT(psau) ((psau)->sa4.sin_port)
! 68:
! 69: /* sockaddr_u v4/v6 port in host byte order */
! 70: #define SRCPORT(psau) (ntohs(NSRCPORT(psau)))
! 71:
! 72: /* assign sockaddr_u v4/v6 port from host byte order */
! 73: #define SET_PORT(psau, port) (NSRCPORT(psau) = htons(port))
! 74:
! 75: /* sockaddr_u v6 scope */
! 76: #define SCOPE_VAR(psau) ((psau)->sa6.sin6_scope_id)
! 77:
! 78: #ifdef ISC_PLATFORM_HAVESCOPEID
! 79: /* v4/v6 scope (always zero for v4) */
! 80: # define SCOPE(psau) (IS_IPV4(psau) \
! 81: ? 0 \
! 82: : SCOPE_VAR(psau))
! 83:
! 84: /* are two v6 sockaddr_u scopes equal? */
! 85: # define SCOPE_EQ(psau1, psau2) \
! 86: (SCOPE_VAR(psau1) == SCOPE_VAR(psau2))
! 87:
! 88: /* assign scope if supported */
! 89: # define SET_SCOPE(psau, s) \
! 90: do \
! 91: if (IS_IPV6(psau)) \
! 92: SCOPE_VAR(psau) = (s); \
! 93: while (0)
! 94: #else /* ISC_PLATFORM_HAVESCOPEID not defined */
! 95: # define SCOPE(psau) (0)
! 96: # define SCOPE_EQ(psau1, psau2) (1)
! 97: # define SET_SCOPE(psau, s) do { } while (0)
! 98: #endif /* ISC_PLATFORM_HAVESCOPEID */
! 99:
! 100: /* v4/v6 is multicast address */
! 101: #define IS_MCAST(psau) \
! 102: (IS_IPV4(psau) \
! 103: ? IN_CLASSD(SRCADR(psau)) \
! 104: : IN6_IS_ADDR_MULTICAST(PSOCK_ADDR6(psau)))
! 105:
! 106: /* v6 is interface ID scope universal, as with MAC-derived addresses */
! 107: #define IS_IID_UNIV(psau) \
! 108: (!!(0x02 & NSRCADR6(psau)[8]))
! 109:
! 110: #define SIZEOF_INADDR(fam) \
! 111: ((AF_INET == (fam)) \
! 112: ? sizeof(struct in_addr) \
! 113: : sizeof(struct in6_addr))
! 114:
! 115: #define SIZEOF_SOCKADDR(fam) \
! 116: ((AF_INET == (fam)) \
! 117: ? sizeof(struct sockaddr_in) \
! 118: : sizeof(struct sockaddr_in6))
! 119:
! 120: #define SOCKLEN(psau) \
! 121: (IS_IPV4(psau) \
! 122: ? sizeof((psau)->sa4) \
! 123: : sizeof((psau)->sa6))
! 124:
! 125: #define ZERO_SOCK(psau) \
! 126: memset((psau), 0, sizeof(*(psau)))
! 127:
! 128: /* blast a byte value across sockaddr_u v6 address */
! 129: #define MEMSET_ADDR6(psau, v) \
! 130: memset((psau)->sa6.sin6_addr.s6_addr, (v), \
! 131: sizeof((psau)->sa6.sin6_addr.s6_addr))
! 132:
! 133: #define SET_ONESMASK(psau) \
! 134: do { \
! 135: if (IS_IPV6(psau)) \
! 136: MEMSET_ADDR6((psau), 0xff); \
! 137: else \
! 138: NSRCADR(psau) = 0xffffffff; \
! 139: } while(0)
! 140:
! 141: /* zero sockaddr_u, fill in family and all-ones (host) mask */
! 142: #define SET_HOSTMASK(psau, family) \
! 143: do { \
! 144: ZERO_SOCK(psau); \
! 145: AF(psau) = (family); \
! 146: SET_ONESMASK(psau); \
! 147: } while (0)
! 148:
! 149: /*
! 150: * compare two in6_addr returning negative, 0, or positive.
! 151: * ADDR6_CMP is negative if *pin6A is lower than *pin6B, zero if they
! 152: * are equal, positive if *pin6A is higher than *pin6B. IN6ADDR_ANY
! 153: * is the lowest address (128 zero bits).
! 154: */
! 155: #define ADDR6_CMP(pin6A, pin6B) \
! 156: memcmp((pin6A)->s6_addr, (pin6B)->s6_addr, \
! 157: sizeof(pin6A)->s6_addr)
! 158:
! 159: /* compare two in6_addr for equality only */
! 160: #if !defined(SYS_WINNT) || !defined(in_addr6)
! 161: #define ADDR6_EQ(pin6A, pin6B) \
! 162: (!ADDR6_CMP(pin6A, pin6B))
! 163: #else
! 164: #define ADDR6_EQ(pin6A, pin6B) \
! 165: IN6_ADDR_EQUAL(pin6A, pin6B)
! 166: #endif
! 167:
! 168: /* compare a in6_addr with socket address */
! 169: #define S_ADDR6_EQ(psau, pin6) \
! 170: ADDR6_EQ(&(psau)->sa6.sin6_addr, pin6)
! 171:
! 172: /* are two sockaddr_u's addresses equal? (port excluded) */
! 173: #define SOCK_EQ(psau1, psau2) \
! 174: ((AF(psau1) != AF(psau2)) \
! 175: ? 0 \
! 176: : IS_IPV4(psau1) \
! 177: ? (NSRCADR(psau1) == NSRCADR(psau2)) \
! 178: : (S_ADDR6_EQ((psau1), PSOCK_ADDR6(psau2)) \
! 179: && SCOPE_EQ((psau1), (psau2))))
! 180:
! 181: /* are two sockaddr_u's addresses and ports equal? */
! 182: #define ADDR_PORT_EQ(psau1, psau2) \
! 183: ((NSRCPORT(psau1) != NSRCPORT(psau2) \
! 184: ? 0 \
! 185: : SOCK_EQ((psau1), (psau2))))
! 186:
! 187: /* is sockaddr_u address unspecified? */
! 188: #define SOCK_UNSPEC(psau) \
! 189: (IS_IPV4(psau) \
! 190: ? !NSRCADR(psau) \
! 191: : IN6_IS_ADDR_UNSPECIFIED(PSOCK_ADDR6(psau)))
! 192:
! 193: /* just how unspecified do you mean? (scope 0/unspec too) */
! 194: #define SOCK_UNSPEC_S(psau) \
! 195: (SOCK_UNSPEC(psau) && !SCOPE(psau))
! 196:
! 197: /* choose a default net interface (struct interface) for v4 or v6 */
! 198: #define ANY_INTERFACE_BYFAM(family) \
! 199: ((AF_INET == family) \
! 200: ? any_interface \
! 201: : any6_interface)
! 202:
! 203: /* choose a default interface for addresses' protocol (addr family) */
! 204: #define ANY_INTERFACE_CHOOSE(psau) \
! 205: ANY_INTERFACE_BYFAM(AF(psau))
! 206:
! 207:
! 208: /*
! 209: * We tell reference clocks from real peers by giving the reference
! 210: * clocks an address of the form 127.127.t.u, where t is the type and
! 211: * u is the unit number. We define some of this here since we will need
! 212: * some sanity checks to make sure this address isn't interpretted as
! 213: * that of a normal peer.
! 214: */
! 215: #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
! 216: #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
! 217:
! 218: #ifdef REFCLOCK
! 219: #define ISREFCLOCKADR(srcadr) \
! 220: (IS_IPV4(srcadr) && \
! 221: (SRCADR(srcadr) & REFCLOCK_MASK) == REFCLOCK_ADDR)
! 222: #else
! 223: #define ISREFCLOCKADR(srcadr) (0)
! 224: #endif
! 225:
! 226: /*
! 227: * Macro for checking for invalid addresses. This is really, really
! 228: * gross, but is needed so no one configures a host on net 127 now that
! 229: * we're encouraging it the the configuration file.
! 230: */
! 231: #define LOOPBACKADR 0x7f000001
! 232: #define LOOPNETMASK 0xff000000
! 233:
! 234: #define ISBADADR(srcadr) \
! 235: (IS_IPV4(srcadr) \
! 236: && ((SRCADR(srcadr) & LOOPNETMASK) \
! 237: == (LOOPBACKADR & LOOPNETMASK)) \
! 238: && SRCADR(srcadr) != LOOPBACKADR)
! 239:
! 240:
! 241: #endif /* NTP_NET_H */
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