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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 */