}
{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+ {
+ ip4_addr a;
+ if (!ip4_pton(yytext, &a))
+ cf_error("Invalid IPv4 address %s", yytext);
+
#ifdef IPV6
- if (ipv4_pton_u32(yytext, &cf_lval.i32))
- return RTRID;
- cf_error("Invalid IPv4 address %s", yytext);
+ cf_lval.i32 = ip4_to_u32(a);
+ return RTRID;
#else
- if (ip_pton(yytext, &cf_lval.a))
- return IPA;
- cf_error("Invalid IP address %s", yytext);
+ cf_lval.a = ipa_from_ip4(a);
+ return IPA;
#endif
}
({XIGIT}*::|({XIGIT}*:){3,})({XIGIT}*|{DIGIT}+\.{DIGIT}+\.{DIGIT}+\.{DIGIT}+) {
#ifdef IPV6
- if (ip_pton(yytext, &cf_lval.a))
+ if (ipa_pton(yytext, &cf_lval.a))
return IPA;
- cf_error("Invalid IP address %s", yytext);
+ cf_error("Invalid IPv6 address %s", yytext);
#else
cf_error("This is an IPv4 router, therefore IPv6 addresses are not supported");
#endif
$$ = $2;
}
| ':' ipa {
- $$ = ipa_mklen($2);
+ $$ = ipa_masklen($2);
if ($$ < 0) cf_error("Invalid netmask %I", $2);
}
;
bitops.h
ip.h
ip.c
-#ifdef IPV6
-ipv6.c
-ipv6.h
-#else
-ipv4.c
-ipv4.h
-#endif
lists.c
lists.h
md5.c
/*
- * BIRD Library -- IP address routines common for IPv4 and IPv6
+ * BIRD Library -- IP address functions
*
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
-#include "nest/bird.h"
-#include "lib/ip.h"
-
/**
* DOC: IP addresses
*
* they must be manipulated using the following functions and macros.
*/
+#include <stdlib.h>
+
+#include "nest/bird.h"
+#include "lib/ip.h"
+
+
+int
+ip6_compare(ip6_addr a, ip6_addr b)
+{
+ int i;
+ for (i=0; i<4; i++)
+ if (a.addr[i] > b.addr[i])
+ return 1;
+ else if (a.addr[i] < b.addr[i])
+ return -1;
+ return 0;
+}
+
+ip6_addr
+ip6_mkmask(uint n)
+{
+ ip6_addr a;
+ int i;
+
+ for (i=0; i<4; i++)
+ {
+ if (!n)
+ a.addr[i] = 0;
+ else if (n >= 32)
+ {
+ a.addr[i] = ~0;
+ n -= 32;
+ }
+ else
+ {
+ a.addr[i] = u32_mkmask(n);
+ n = 0;
+ }
+ }
+
+ return a;
+}
+
+int
+ip6_masklen(ip6_addr *a)
+{
+ int i, j, n;
+
+ for (i=0, n=0; i<4; i++, n+=32)
+ if (a->addr[i] != ~0U)
+ {
+ j = u32_masklen(a->addr[i]);
+ if (j < 0)
+ return j;
+ n += j;
+ while (++i < 4)
+ if (a->addr[i])
+ return -1;
+ break;
+ }
+
+ return n;
+}
+
+int
+ip4_classify(ip4_addr ad)
+{
+ u32 a = _I(ad);
+ u32 b = a >> 24U;
+
+ if (b && b <= 0xdf)
+ {
+ if (b == 0x7f)
+ return IADDR_HOST | SCOPE_HOST;
+ else if ((b == 0x0a) ||
+ ((a & 0xffff0000) == 0xc0a80000) ||
+ ((a & 0xfff00000) == 0xac100000))
+ return IADDR_HOST | SCOPE_SITE;
+ else
+ return IADDR_HOST | SCOPE_UNIVERSE;
+ }
+
+ if (b >= 0xe0 && b <= 0xef)
+ return IADDR_MULTICAST | SCOPE_UNIVERSE;
+
+ if (a == 0xffffffff)
+ return IADDR_BROADCAST | SCOPE_LINK;
+
+ return IADDR_INVALID;
+}
+
+int
+ip6_classify(ip6_addr *a)
+{
+ u32 x = a->addr[0];
+
+ if ((x & 0xe0000000) == 0x20000000) /* 2000::/3 Aggregatable Global Unicast Address */
+ return IADDR_HOST | SCOPE_UNIVERSE;
+ if ((x & 0xffc00000) == 0xfe800000) /* fe80::/10 Link-Local Address */
+ return IADDR_HOST | SCOPE_LINK;
+ if ((x & 0xffc00000) == 0xfec00000) /* fec0::/10 Site-Local Address */
+ return IADDR_HOST | SCOPE_SITE;
+ if ((x & 0xfe000000) == 0xfc000000) /* fc00::/7 Unique Local Unicast Address (RFC 4193) */
+ return IADDR_HOST | SCOPE_SITE;
+ if ((x & 0xff000000) == 0xff000000) /* ff00::/8 Multicast Address */
+ {
+ uint scope = (x >> 16) & 0x0f;
+ switch (scope)
+ {
+ case 1: return IADDR_MULTICAST | SCOPE_HOST;
+ case 2: return IADDR_MULTICAST | SCOPE_LINK;
+ case 5: return IADDR_MULTICAST | SCOPE_SITE;
+ case 8: return IADDR_MULTICAST | SCOPE_ORGANIZATION;
+ case 14: return IADDR_MULTICAST | SCOPE_UNIVERSE;
+ default: return IADDR_MULTICAST | SCOPE_UNDEFINED;
+ }
+ }
+
+ if (!x && !a->addr[1])
+ {
+ u32 a2 = a->addr[2];
+ u32 a3 = a->addr[3];
+
+ if (a2 == 0 && a3 == 1)
+ return IADDR_HOST | SCOPE_HOST; /* Loopback address */
+ if (a2 == 0)
+ return ip4_classify(_MI4(a3)); /* IPv4 compatible addresses */
+ if (a2 == 0xffff)
+ return ip4_classify(_MI4(a3)); /* IPv4 mapped addresses */
+
+ return IADDR_INVALID;
+ }
+
+ return IADDR_HOST | SCOPE_UNDEFINED;
+}
+
+
+
+/*
+ * Conversion of IPv6 address to presentation format and vice versa.
+ * Heavily inspired by routines written by Paul Vixie for the BIND project
+ * and of course by RFC 2373.
+ */
+
+
+char *
+ip4_ntop(ip4_addr a, char *b)
+{
+ u32 x = _I(a);
+ return b + bsprintf(b, "%d.%d.%d.%d", (x >> 24) & 0xff, (x >> 16) & 0xff, (x >> 8) & 0xff, x & 0xff);
+}
+
+
+char *
+ip6_ntop(ip6_addr a, char *b)
+{
+ u16 words[8];
+ int bestpos, bestlen, curpos, curlen, i;
+
+ /* First of all, preprocess the address and find the longest run of zeros */
+ bestlen = bestpos = curpos = curlen = 0;
+ for (i=0; i<8; i++)
+ {
+ u32 x = a.addr[i/2];
+ words[i] = ((i%2) ? x : (x >> 16)) & 0xffff;
+ if (words[i])
+ curlen = 0;
+ else
+ {
+ if (!curlen)
+ curpos = i;
+ curlen++;
+ if (curlen > bestlen)
+ {
+ bestpos = curpos;
+ bestlen = curlen;
+ }
+ }
+ }
+
+ if (bestlen < 2)
+ bestpos = -1;
+
+ /* Is it an encapsulated IPv4 address? */
+ if (!bestpos && ((bestlen == 5 && a.addr[2] == 0xffff) || (bestlen == 6)))
+ {
+ u32 x = a.addr[3];
+ b += bsprintf(b, "::%s%d.%d.%d.%d",
+ a.addr[2] ? "ffff:" : "",
+ (x >> 24) & 0xff,
+ (x >> 16) & 0xff,
+ (x >> 8) & 0xff,
+ x & 0xff);
+ return b;
+ }
+
+ /* Normal IPv6 formatting, compress the largest sequence of zeros */
+ for (i=0; i<8; i++)
+ {
+ if (i == bestpos)
+ {
+ i += bestlen - 1;
+ *b++ = ':';
+ if (i == 7)
+ *b++ = ':';
+ }
+ else
+ {
+ if (i)
+ *b++ = ':';
+ b += bsprintf(b, "%x", words[i]);
+ }
+ }
+ *b = 0;
+ return b;
+}
+
+int
+ip4_pton(char *a, ip4_addr *o)
+{
+ int i;
+ unsigned long int l;
+ u32 ia = 0;
+
+ i=4;
+ while (i--)
+ {
+ char *d, *c = strchr(a, '.');
+ if (!c != !i)
+ return 0;
+ l = strtoul(a, &d, 10);
+ if (d != c && *d || l > 255)
+ return 0;
+ ia = (ia << 8) | l;
+ if (c)
+ c++;
+ a = c;
+ }
+ *o = ip4_from_u32(ia);
+ return 1;
+}
+
+int
+ip6_pton(char *a, ip6_addr *o)
+{
+ u16 words[8];
+ int i, j, k, l, hfil;
+ char *start;
+
+ if (a[0] == ':') /* Leading :: */
+ {
+ if (a[1] != ':')
+ return 0;
+ a++;
+ }
+
+ hfil = -1;
+ i = 0;
+ while (*a)
+ {
+ if (*a == ':') /* :: */
+ {
+ if (hfil >= 0)
+ return 0;
+
+ hfil = i;
+ a++;
+ continue;
+ }
+
+ j = 0;
+ l = 0;
+ start = a;
+ for (;;)
+ {
+ if (*a >= '0' && *a <= '9')
+ k = *a++ - '0';
+ else if (*a >= 'A' && *a <= 'F')
+ k = *a++ - 'A' + 10;
+ else if (*a >= 'a' && *a <= 'f')
+ k = *a++ - 'a' + 10;
+ else
+ break;
+
+ j = (j << 4) + k;
+ if (j >= 0x10000 || ++l > 4)
+ return 0;
+ }
+
+ if (*a == ':' && a[1])
+ a++;
+ else if (*a == '.' && (i == 6 || i < 6 && hfil >= 0))
+ { /* Embedded IPv4 address */
+ ip4_addr x;
+ if (!ip4_pton(start, &x))
+ return 0;
+ words[i++] = _I(x) >> 16;
+ words[i++] = _I(x);
+ break;
+ }
+ else if (*a)
+ return 0;
+
+ if (i >= 8)
+ return 0;
+
+ words[i++] = j;
+ }
+
+ /* Replace :: with an appropriate number of zeros */
+ if (hfil >= 0)
+ {
+ j = 8 - i;
+ for (i=7; i-j >= hfil; i--)
+ words[i] = words[i-j];
+ for (; i>=hfil; i--)
+ words[i] = 0;
+ }
+
+ /* Convert the address to ip6_addr format */
+ for (i=0; i<4; i++)
+ o->addr[i] = (words[2*i] << 16) | words[2*i+1];
+
+ return 1;
+}
+
+
/**
* ip_scope_text - get textual representation of address scope
* @scope: scope (%SCOPE_xxx)
* Returns a pointer to a textual name of the scope given.
*/
char *
-ip_scope_text(unsigned scope)
+ip_scope_text(uint scope)
{
static char *scope_table[] = { "host", "link", "site", "org", "univ", "undef" };
return scope_table[scope];
}
+ip4_addr
+ip4_class_mask(ip4_addr ad)
+{
+ u32 m, a = _I(ad);
+
+ if (a < 0x80000000)
+ m = 0xff000000;
+ else if (a < 0xc0000000)
+ m = 0xffff0000;
+ else
+ m = 0xffffff00;
+ if (a & ~m)
+ m = 0xffffffff;
+
+ return _MI4(m);
+}
+
#if 0
/**
* ipa_equal - compare two IP addresses for equality
ip_addr ipa_mkmask(int x) { DUMMY }
/**
- * ipa_mkmask - calculate netmask length
+ * ipa_masklen - calculate netmask length
* @x: IP address
*
* This function checks whether @x represents a valid netmask and
* returns the size of the associate network prefix or -1 for invalid
* mask.
*/
-int ipa_mklen(ip_addr x) { DUMMY }
+int ipa_masklen(ip_addr x) { DUMMY }
/**
* ipa_hash - hash IP addresses
int ipa_classify(ip_addr x) { DUMMY }
/**
- * ipa_class_mask - guess netmask according to address class
- * @x: IP address
+ * ip4_class_mask - guess netmask according to address class
+ * @x: IPv4 address
*
* This function (available in IPv4 version only) returns a
* network mask according to the address class of @x. Although
* routing protocols transferring no prefix lengths nor netmasks
* and this function could be useful to them.
*/
-ip_addr ipa_class_mask(ip_addr x) { DUMMY }
+ip4_addr ip4_class_mask(ip4_addr x) { DUMMY }
/**
* ipa_from_u32 - convert IPv4 address to an integer
int ipa_compare(ip_addr x, ip_addr y) { DUMMY }
/**
- * ipa_build - build an IPv6 address from parts
+ * ipa_build6 - build an IPv6 address from parts
* @a1: part #1
* @a2: part #2
* @a3: part #3
* address. It's used for example when a protocol wants to bind its
* socket to a hard-wired multicast address.
*/
-ip_addr ipa_build(u32 a1, u32 a2, u32 a3, u32 a4) { DUMMY }
-
-/**
- * ipa_absolutize - convert link scope IPv6 address to universe scope
- * @x: link scope IPv6 address
- * @y: universe scope IPv6 prefix of the interface
- *
- * This function combines a link-scope IPv6 address @x with the universe
- * scope prefix @x of the network assigned to an interface to get a
- * universe scope form of @x.
- */
-ip_addr ipa_absolutize(ip_addr x, ip_addr y) { DUMMY }
+ip_addr ipa_build6(u32 a1, u32 a2, u32 a3, u32 a4) { DUMMY }
/**
* ip_ntop - convert IP address to textual representation
#ifndef _BIRD_IP_H_
#define _BIRD_IP_H_
-#ifndef IPV6
-#include "ipv4.h"
+#include "lib/endian.h"
+#include "lib/string.h"
+#include "lib/bitops.h"
+#include "lib/unaligned.h"
+
+
+#define IP4_OSPF_ALL_ROUTERS ipa_build4(224, 0, 0, 5)
+#define IP4_OSPF_DES_ROUTERS ipa_build4(224, 0, 0, 6)
+
+#define IP6_ALL_NODES ipa_build6(0xFF020000, 0, 0, 1)
+#define IP6_ALL_ROUTERS ipa_build6(0xFF020000, 0, 0, 2)
+#define IP6_OSPF_ALL_ROUTERS ipa_build6(0xFF020000, 0, 0, 5)
+#define IP6_OSPF_DES_ROUTERS ipa_build6(0xFF020000, 0, 0, 6)
+#define IP6_RIP_ROUTERS ipa_build6(0xFF020000, 0, 0, 9)
+
+#define IP4_NONE _MI4(0)
+#define IP6_NONE _MI6(0,0,0,0)
+
+#define IP4_MIN_MTU 576
+#define IP6_MIN_MTU 1280
+
+#define IP_PREC_INTERNET_CONTROL 0xc0
+
+
+#ifdef IPV6
+#define MAX_PREFIX_LENGTH 128
+#define BITS_PER_IP_ADDRESS 128
+#define STD_ADDRESS_P_LENGTH 39
+#define SIZE_OF_IP_HEADER 40
#else
-#include "ipv6.h"
+#define MAX_PREFIX_LENGTH 32
+#define BITS_PER_IP_ADDRESS 32
+#define STD_ADDRESS_P_LENGTH 15
+#define SIZE_OF_IP_HEADER 24
+#endif
+
+
+#ifdef DEBUGGING
+
+typedef struct ip4_addr {
+ u32 addr;
+} ip4_addr;
+
+#define _MI4(x) ((struct ip4_addr) { x })
+#define _I(x) (x).addr
+
+#else
+
+typedef u32 ip4_addr;
+
+#define _MI4(x) (x)
+#define _I(x) (x)
+
+#endif
+
+
+typedef struct ip6_addr {
+ u32 addr[4];
+} ip6_addr;
+
+#define _MI6(a,b,c,d) ((struct ip6_addr) {{ a, b, c, d }})
+#define _I0(a) ((a).addr[0])
+#define _I1(a) ((a).addr[1])
+#define _I2(a) ((a).addr[2])
+#define _I3(a) ((a).addr[3])
+
+
+#ifdef IPV6
+
+/* Structure ip_addr may contain both IPv4 and IPv6 addresses */
+typedef ip6_addr ip_addr;
+#define IPA_NONE IP6_NONE
+
+#define ipa_from_ip4(x) _MI6(0,0,0xffff,_I(x))
+#define ipa_from_ip6(x) x
+#define ipa_from_u32(x) ipa_from_ip4(ip4_from_u32(x))
+
+#define ipa_to_ip4(x) _MI4(_I3(x))
+#define ipa_to_ip6(x) x
+#define ipa_to_u32(x) ip4_to_u32(ipa_to_ip4(x))
+
+#define ipa_is_ip4(a) ip6_is_v4mapped(a)
+
+#else
+
+/* Provisionary ip_addr definition same as ip4_addr */
+typedef ip4_addr ip_addr;
+#define IPA_NONE IP4_NONE
+
+#define ipa_from_ip4(x) x
+#define ipa_from_ip6(x) IPA_NONE
+#define ipa_from_u32(x) ipa_from_ip4(ip4_from_u32(x))
+
+#define ipa_to_ip4(x) x
+#define ipa_to_ip6(x) IP6_NONE
+#define ipa_to_u32(x) ip4_to_u32(ipa_to_ip4(x))
+
+#define ipa_is_ip4(a) 1
+
+#endif
+
+
+/*
+ * Public constructors
+ */
+
+#define ip4_from_u32(x) _MI4(x)
+#define ip4_to_u32(x) _I(x)
+
+#define ip4_build(a,b,c,d) _MI4(((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
+#define ip6_build(a,b,c,d) _MI6(a,b,c,d)
+
+#define ipa_build4(a,b,c,d) ipa_from_ip4(ip4_build(a,b,c,d))
+#define ipa_build6(a,b,c,d) ipa_from_ip6(ip6_build(a,b,c,d))
+
+
+/*
+ * Basic algebraic functions
+ */
+
+static inline int ip4_equal(ip4_addr a, ip4_addr b)
+{ return _I(a) == _I(b); }
+
+static inline int ip4_zero(ip4_addr a)
+{ return _I(a) == 0; }
+
+static inline int ip4_nonzero(ip4_addr a)
+{ return _I(a) != 0; }
+
+static inline ip4_addr ip4_and(ip4_addr a, ip4_addr b)
+{ return _MI4(_I(a) & _I(b)); }
+
+static inline ip4_addr ip4_or(ip4_addr a, ip4_addr b)
+{ return _MI4(_I(a) | _I(b)); }
+
+static inline ip4_addr ip4_xor(ip4_addr a, ip4_addr b)
+{ return _MI4(_I(a) ^ _I(b)); }
+
+static inline ip4_addr ip4_not(ip4_addr a)
+{ return _MI4(~_I(a)); }
+
+
+static inline int ip6_equal(ip6_addr a, ip6_addr b)
+{ return _I0(a) == _I0(b) && _I1(a) == _I1(b) && _I2(a) == _I2(b) && _I3(a) == _I3(b); }
+
+static inline int ip6_zero(ip6_addr a)
+{ return !_I0(a) && !_I1(a) && !_I2(a) && !_I3(a); }
+
+static inline int ip6_nonzero(ip6_addr a)
+{ return _I0(a) || _I1(a) || _I2(a) || _I3(a); }
+
+static inline ip6_addr ip6_and(ip6_addr a, ip6_addr b)
+{ return _MI6(_I0(a) & _I0(b), _I1(a) & _I1(b), _I2(a) & _I2(b), _I3(a) & _I3(b)); }
+
+static inline ip6_addr ip6_or(ip6_addr a, ip6_addr b)
+{ return _MI6(_I0(a) | _I0(b), _I1(a) | _I1(b), _I2(a) | _I2(b), _I3(a) | _I3(b)); }
+
+static inline ip6_addr ip6_xor(ip6_addr a, ip6_addr b)
+{ return _MI6(_I0(a) ^ _I0(b), _I1(a) ^ _I1(b), _I2(a) ^ _I2(b), _I3(a) ^ _I3(b)); }
+
+static inline ip6_addr ip6_not(ip6_addr a)
+{ return _MI6(~_I0(a), ~_I1(a), ~_I2(a), ~_I3(a)); }
+
+
+#ifdef IPV6
+#define ipa_equal(x,y) ip6_equal(x,y)
+#define ipa_zero(x) ip6_zero(x)
+#define ipa_nonzero(x) ip6_nonzero(x)
+#define ipa_and(x,y) ip6_and(x,y)
+#define ipa_or(x,y) ip6_or(x,y)
+#define ipa_xor(x,y) ip6_xor(x,y)
+#define ipa_not(x) ip6_not(x)
+#else
+#define ipa_equal(x,y) ip4_equal(x,y)
+#define ipa_zero(x) ip4_zero(x)
+#define ipa_nonzero(x) ip4_nonzero(x)
+#define ipa_and(x,y) ip4_and(x,y)
+#define ipa_or(x,y) ip4_or(x,y)
+#define ipa_xor(x,y) ip4_xor(x,y)
+#define ipa_not(x) ip4_not(x)
+#endif
+
+
+
+#ifdef IPV6
+/*
+ * A zero address is either a token for invalid/unused, or the prefix of default
+ * routes. These functions should be used in the second case, where both IPv4
+ * and IPv6 zero addresses should be checked.
+ */
+
+static inline int ipa_zero2(ip_addr a)
+{ return !_I0(a) && !_I1(a) && ((_I2(a) == 0) || (_I2(a) == 0xffff)) && !_I3(a); }
+
+static inline int ipa_nonzero2(ip_addr a)
+{ return _I0(a) || _I1(a) || ((_I2(a) != 0) && (_I2(a) != 0xffff)) || _I3(a); }
+
+#else
+#define ipa_zero2(x) ip4_zero(x)
+#define ipa_nonzero2(x) ip4_nonzero(x)
+#endif
+
+
+/*
+ * Hash and compare functions
+ */
+
+static inline uint ip4_hash(ip4_addr a)
+{
+ /* Returns a 16-bit value */
+ u32 x = _I(a);
+ x ^= x >> 16;
+ x ^= x << 10;
+ return x & 0xffff;
+}
+
+static inline u32 ip4_hash32(ip4_addr a)
+{
+ /* Returns a 32-bit value, although low-order bits are not mixed */
+ u32 x = _I(a);
+ x ^= x << 16;
+ x ^= x << 12;
+ return x;
+}
+
+static inline uint ip6_hash(ip6_addr a)
+{
+ /* Returns a 16-bit hash key */
+ u32 x = _I0(a) ^ _I1(a) ^ _I2(a) ^ _I3(a);
+ return (x ^ (x >> 16) ^ (x >> 8)) & 0xffff;
+}
+
+static inline u32 ip6_hash32(ip6_addr a)
+{
+ /* Returns a 32-bit hash key, although low-order bits are not mixed */
+ u32 x = _I0(a) ^ _I1(a) ^ _I2(a) ^ _I3(a);
+ return x ^ (x << 16) ^ (x << 24);
+}
+
+static inline int ip4_compare(ip4_addr a, ip4_addr b)
+{ return (_I(a) > _I(b)) - (_I(a) < _I(b)); }
+
+int ip6_compare(ip6_addr a, ip6_addr b);
+
+
+#ifdef IPV6
+#define ipa_hash(x) ip6_hash(x)
+#define ipa_hash32(x) ip6_hash32(x)
+#define ipa_compare(x,y) ip6_compare(x,y)
+#else
+#define ipa_hash(x) ip4_hash(x)
+#define ipa_hash32(x) ip4_hash32(x)
+#define ipa_compare(x,y) ip4_compare(x,y)
#endif
-#define ipa_zero(x) (!ipa_nonzero(x))
-#define ip_is_prefix(a,l) (!ipa_nonzero(ipa_and(a, ipa_not(ipa_mkmask(l)))))
-#define ipa_in_net(x,n,p) (ipa_zero(ipa_and(ipa_xor((n),(x)),ipa_mkmask(p))))
-#define net_in_net(n1,l1,n2,l2) (((l1) >= (l2)) && (ipa_zero(ipa_and(ipa_xor((n1),(n2)),ipa_mkmask(l2)))))
/*
- * ip_classify() returns either a negative number for invalid addresses
- * or scope OR'ed together with address type.
+ * IP address classification
*/
+/* Address class */
#define IADDR_INVALID -1
#define IADDR_SCOPE_MASK 0xfff
#define IADDR_HOST 0x1000
#define IADDR_BROADCAST 0x2000
#define IADDR_MULTICAST 0x4000
+/* Address scope */
+#define SCOPE_HOST 0
+#define SCOPE_LINK 1
+#define SCOPE_SITE 2
+#define SCOPE_ORGANIZATION 3
+#define SCOPE_UNIVERSE 4
+#define SCOPE_UNDEFINED 5
+
+int ip4_classify(ip4_addr ad);
+int ip6_classify(ip6_addr *a);
+
+static inline int ip6_is_link_local(ip6_addr a)
+{ return (_I0(a) & 0xffc00000) == 0xfe800000; }
+
+static inline int ip6_is_v4mapped(ip6_addr a)
+{ return _I0(a) == 0 && _I1(a) == 0 && _I2(a) == 0xffff; }
+
+#ifdef IPV6
+#define ipa_classify(x) ip6_classify(&(x))
+#define ipa_is_link_local(x) ip6_is_link_local(x)
+#else
+#define ipa_classify(x) ip4_classify(x)
+#define ipa_is_link_local(x) 0
+#endif
+
+static inline int ipa_classify_net(ip_addr a)
+{ return ipa_zero2(a) ? (IADDR_HOST | SCOPE_UNIVERSE) : ipa_classify(a); }
+
+
/*
- * Address scope
+ * Miscellaneous IP prefix manipulation
*/
-#define SCOPE_HOST 0
-#define SCOPE_LINK 1
-#define SCOPE_SITE 2
-#define SCOPE_ORGANIZATION 3
-#define SCOPE_UNIVERSE 4
-#define SCOPE_UNDEFINED 5
+static inline ip4_addr ip4_mkmask(uint n)
+{ return _MI4(u32_mkmask(n)); }
+
+static inline int ip4_masklen(ip4_addr a)
+{ return u32_masklen(_I(a)); }
+
+ip6_addr ip6_mkmask(uint n);
+int ip6_masklen(ip6_addr *a);
+
+/* ipX_pxlen() requires that x != y */
+static inline uint ip4_pxlen(ip4_addr a, ip4_addr b)
+{ return 31 - u32_log2(_I(a) ^ _I(b)); }
+
+static inline uint ip6_pxlen(ip6_addr a, ip6_addr b)
+{
+ int i = 0;
+ i += (a.addr[i] == b.addr[i]);
+ i += (a.addr[i] == b.addr[i]);
+ i += (a.addr[i] == b.addr[i]);
+ i += (a.addr[i] == b.addr[i]);
+ return 32 * i + 31 - u32_log2(a.addr[i] ^ b.addr[i]);
+}
+
+static inline u32 ip4_getbit(ip4_addr a, uint pos)
+{ return _I(a) & (0x80000000 >> pos); }
+
+static inline u32 ip6_getbit(ip6_addr a, uint pos)
+{ return a.addr[pos / 32] & (0x80000000 >> (pos % 32)); }
+
+static inline ip4_addr ip4_opposite_m1(ip4_addr a)
+{ return _MI4(_I(a) ^ 1); }
+
+static inline ip4_addr ip4_opposite_m2(ip4_addr a)
+{ return _MI4(_I(a) ^ 3); }
+
+static inline ip6_addr ip6_opposite_m1(ip6_addr a)
+{ return _MI6(_I0(a), _I1(a), _I2(a), _I3(a) ^ 1); }
+
+static inline ip6_addr ip6_opposite_m2(ip6_addr a)
+{ return _MI6(_I0(a), _I1(a), _I2(a), _I3(a) ^ 3); }
+
+ip4_addr ip4_class_mask(ip4_addr ad);
+
+#ifdef IPV6
+#define ipa_mkmask(x) ip6_mkmask(x)
+#define ipa_masklen(x) ip6_masklen(&x)
+#define ipa_pxlen(x,y) ip6_pxlen(x,y)
+#define ipa_getbit(x,n) ip6_getbit(x,n)
+#define ipa_opposite_m1(x) ip6_opposite_m1(x)
+#define ipa_opposite_m2(x) ip6_opposite_m2(x)
+#else
+#define ipa_mkmask(x) ip4_mkmask(x)
+#define ipa_masklen(x) ip4_masklen(x)
+#define ipa_pxlen(x,y) ip4_pxlen(x,y)
+#define ipa_getbit(x,n) ip4_getbit(x,n)
+#define ipa_opposite_m1(x) ip4_opposite_m1(x)
+#define ipa_opposite_m2(x) ip4_opposite_m2(x)
+#endif
-char *ip_scope_text(unsigned);
/*
- * Network prefixes
+ * Host/network order conversions
*/
-struct prefix {
- ip_addr addr;
- unsigned int len;
-};
+static inline ip4_addr ip4_hton(ip4_addr a)
+{ return _MI4(htonl(_I(a))); }
+
+static inline ip4_addr ip4_ntoh(ip4_addr a)
+{ return _MI4(ntohl(_I(a))); }
+
+static inline ip6_addr ip6_hton(ip6_addr a)
+{ return _MI6(htonl(_I0(a)), htonl(_I1(a)), htonl(_I2(a)), htonl(_I3(a))); }
+
+static inline ip6_addr ip6_ntoh(ip6_addr a)
+{ return _MI6(ntohl(_I0(a)), ntohl(_I1(a)), ntohl(_I2(a)), ntohl(_I3(a))); }
+
+#ifdef IPV6
+#define ipa_hton(x) x = ip6_hton(x)
+#define ipa_ntoh(x) x = ip6_ntoh(x)
+#else
+#define ipa_hton(x) x = ip4_hton(x)
+#define ipa_ntoh(x) x = ip4_ntoh(x)
+#endif
+
+
+/*
+ * Unaligned data access (in network order)
+ */
+
+static inline ip4_addr get_ip4(void *buf)
+{
+ return _MI4(get_u32(buf));
+}
+
+static inline ip6_addr get_ip6(void *buf)
+{
+ ip6_addr a;
+ memcpy(&a, buf, 16);
+ return ip6_ntoh(a);
+}
+
+static inline void * put_ip4(void *buf, ip4_addr a)
+{
+ put_u32(buf, _I(a));
+ return buf+4;
+}
+
+static inline void * put_ip6(void *buf, ip6_addr a)
+{
+ a = ip6_hton(a);
+ memcpy(buf, &a, 16);
+ return buf+16;
+}
+
+// XXXX these functions must be redesigned or removed
+#ifdef IPV6
+#define get_ipa(x) get_ip6(x)
+#define put_ipa(x,y) put_ip6(x,y)
+#else
+#define get_ipa(x) get_ip4(x)
+#define put_ipa(x,y) put_ip4(x,y)
+#endif
+
+
+/*
+ * Binary/text form conversions
+ */
+
+char *ip4_ntop(ip4_addr a, char *b);
+char *ip6_ntop(ip6_addr a, char *b);
+
+static inline char * ip4_ntox(ip4_addr a, char *b)
+{ return b + bsprintf(b, "%08x", _I(a)); }
+
+static inline char * ip6_ntox(ip6_addr a, char *b)
+{ return b + bsprintf(b, "%08x.%08x.%08x.%08x", _I0(a), _I1(a), _I2(a), _I3(a)); }
+
+int ip4_pton(char *a, ip4_addr *o);
+int ip6_pton(char *a, ip6_addr *o);
+
+// XXXX these functions must be redesigned or removed
+#ifdef IPV6
+#define ipa_ntop(x,y) ip6_ntop(x,y)
+#define ipa_ntox(x,y) ip6_ntox(x,y)
+#define ipa_pton(x,y) ip6_pton(x,y)
+#else
+#define ipa_ntop(x,y) ip4_ntop(x,y)
+#define ipa_ntox(x,y) ip4_ntox(x,y)
+#define ipa_pton(x,y) ip4_pton(x,y)
+#endif
-static inline int ipa_classify_net(ip_addr a)
-{ return ipa_zero(a) ? (IADDR_HOST | SCOPE_UNIVERSE) : ipa_classify(a); }
/*
- * Conversions between internal and string representation
+ * Miscellaneous
*/
-char *ip_ntop(ip_addr a, char *);
-char *ip_ntox(ip_addr a, char *);
-int ip_pton(char *a, ip_addr *o);
+// XXXX review this
+
+#define ip_is_prefix(a,l) (!ipa_nonzero(ipa_and(a, ipa_not(ipa_mkmask(l)))))
+#define ipa_in_net(x,n,p) (ipa_zero(ipa_and(ipa_xor((n),(x)),ipa_mkmask(p))))
+#define net_in_net(n1,l1,n2,l2) (((l1) >= (l2)) && (ipa_zero(ipa_and(ipa_xor((n1),(n2)),ipa_mkmask(l2)))))
+
+char *ip_scope_text(unsigned);
+
+struct prefix {
+ ip_addr addr;
+ unsigned int len;
+};
+
#endif
+++ /dev/null
-/*
- * BIRD Library -- IPv4 Address Manipulation Functions
- *
- * (c) 1998 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#include <stdlib.h>
-
-#include "nest/bird.h"
-#include "lib/ip.h"
-#include "lib/string.h"
-
-int
-ipv4_classify(u32 a)
-{
- u32 b = a >> 24U;
-
- if (b && b <= 0xdf)
- {
- if (b == 0x7f)
- return IADDR_HOST | SCOPE_HOST;
- else if (b == 0x0a ||
- (a & 0xffff0000) == 0xc0a80000 ||
- (a & 0xfff00000) == 0xac100000)
- return IADDR_HOST | SCOPE_SITE;
- else
- return IADDR_HOST | SCOPE_UNIVERSE;
- }
- if (b >= 0xe0 && b <= 0xef)
- return IADDR_MULTICAST | SCOPE_UNIVERSE;
- if (a == 0xffffffff)
- return IADDR_BROADCAST | SCOPE_LINK;
- return IADDR_INVALID;
-}
-
-char *
-ip_ntop(ip_addr a, char *b)
-{
- u32 x = _I(a);
-
- return b + bsprintf(b, "%d.%d.%d.%d",
- ((x >> 24) & 0xff),
- ((x >> 16) & 0xff),
- ((x >> 8) & 0xff),
- (x & 0xff));
-}
-
-char *
-ip_ntox(ip_addr a, char *b)
-{
- return b + bsprintf(b, "%08x", _I(a));
-}
-
-u32
-ipv4_class_mask(u32 a)
-{
- u32 m;
-
- if (a < 0x80000000)
- m = 0xff000000;
- else if (a < 0xc0000000)
- m = 0xffff0000;
- else
- m = 0xffffff00;
- while (a & ~m)
- m |= m >> 1;
- return m;
-}
-
-int
-ip_pton(char *a, ip_addr *o)
-{
- int i;
- unsigned long int l;
- u32 ia = 0;
-
- i=4;
- while (i--)
- {
- char *d, *c = strchr(a, '.');
- if (!c != !i)
- return 0;
- l = strtoul(a, &d, 10);
- if (d != c && *d || l > 255)
- return 0;
- ia = (ia << 8) | l;
- if (c)
- c++;
- a = c;
- }
- *o = ipa_from_u32(ia);
- return 1;
-}
-
-byte *
-ipv4_skip_header(byte *pkt, int *len)
-{
- int l = *len;
- int q;
-
- if (l < 20 || (*pkt & 0xf0) != 0x40)
- return NULL;
- q = (*pkt & 0x0f) * 4;
- if (q > l)
- return NULL;
- *len -= q;
- return pkt + q;
-}
+++ /dev/null
-/*
- * BIRD -- IP Addresses et Cetera for IPv4
- *
- * (c) 1998--1999 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_IPV4_H_
-#define _BIRD_IPV4_H_
-
-#include "lib/endian.h"
-#include "lib/bitops.h"
-#include "lib/unaligned.h"
-
-#ifdef DEBUGGING
-
-/*
- * Use the structural representation when you want to make sure
- * nobody unauthorized attempts to handle ip_addr as number.
- */
-
-typedef struct ipv4_addr {
- u32 addr;
-} ip_addr;
-
-#define _I(x) (x).addr
-#define _MI(x) ((struct ipv4_addr) { x })
-
-#else
-
-typedef u32 ip_addr;
-
-#define _I(x) (x)
-#define _MI(x) (x)
-
-#endif
-
-#define MAX_PREFIX_LENGTH 32
-#define BITS_PER_IP_ADDRESS 32
-#define STD_ADDRESS_P_LENGTH 15
-#define SIZE_OF_IP_HEADER 24
-
-#define IPA_NONE (_MI(0))
-
-#define ipa_equal(x,y) (_I(x) == _I(y))
-#define ipa_nonzero(x) _I(x)
-#define ipa_and(x,y) _MI(_I(x) & _I(y))
-#define ipa_or(x,y) _MI(_I(x) | _I(y))
-#define ipa_xor(x,y) _MI(_I(x) ^ _I(y))
-#define ipa_not(x) _MI(~_I(x))
-#define ipa_mkmask(x) _MI(u32_mkmask(x))
-#define ipa_mklen(x) u32_masklen(_I(x))
-#define ipa_hash(x) ipv4_hash(_I(x))
-#define ipa_hash32(x) ipv4_hash32(_I(x))
-#define ipa_hton(x) x = _MI(htonl(_I(x)))
-#define ipa_ntoh(x) x = _MI(ntohl(_I(x)))
-#define ipa_classify(x) ipv4_classify(_I(x))
-#define ipa_has_link_scope(x) ipv4_has_link_scope(_I(x))
-#define ipa_opposite_m1(x) _MI(_I(x) ^ 1)
-#define ipa_opposite_m2(x) _MI(_I(x) ^ 3)
-#define ipa_class_mask(x) _MI(ipv4_class_mask(_I(x)))
-#define ipa_from_u32(x) _MI(x)
-#define ipa_to_u32(x) _I(x)
-#define ipa_compare(x,y) ipv4_compare(_I(x),_I(y))
-/* ipa_pxlen() requires that x != y */
-#define ipa_pxlen(x, y) ipv4_pxlen(_I(x), _I(y))
-#define ipa_getbit(x, y) (_I(x) & (0x80000000 >> (y)))
-#define ipa_put_addr(x, y) ipv4_put_addr(x, y)
-
-#define ip_skip_header(x, y) ipv4_skip_header(x, y)
-
-int ipv4_classify(u32);
-u32 ipv4_class_mask(u32);
-byte *ipv4_skip_header(byte *, int *);
-
-static inline int ipv4_has_link_scope(u32 a UNUSED)
-{
- return 0;
-}
-
-static inline unsigned ipv4_hash(u32 a)
-{
- /* Returns a 16-bit value */
- a ^= a >> 16;
- a ^= a << 10;
- return a & 0xffff;
-}
-
-static inline u32 ipv4_hash32(u32 a)
-{
- /* Returns a 32-bit value, although low-order bits are not mixed */
- a ^= a << 16;
- a ^= a << 12;
- return a;
-}
-
-static inline int ipv4_compare(u32 x, u32 y)
-{
- return (x > y) - (x < y);
-}
-
-static inline u32 ipv4_pxlen(u32 a, u32 b)
-{
- return 31 - u32_log2(a ^ b);
-}
-
-static inline byte * ipv4_put_addr(byte *buf, ip_addr a)
-{
- put_u32(buf, _I(a));
- return buf+4;
-}
-
-#define IP_PREC_INTERNET_CONTROL 0xc0
-
-#endif
+++ /dev/null
-/*
- * BIRD Library -- IPv6 Address Manipulation Functions
- *
- * (c) 1999 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#include <stdlib.h>
-
-#include "nest/bird.h"
-#include "lib/ip.h"
-#include "lib/bitops.h"
-#include "lib/endian.h"
-#include "lib/string.h"
-
-/*
- * See RFC 2373 for explanation of IPv6 addressing issues.
- */
-
-ip_addr
-ipv6_mkmask(unsigned n)
-{
- ip_addr a;
- int i;
-
- for(i=0; i<4; i++)
- {
- if (!n)
- a.addr[i] = 0;
- else if (n >= 32)
- {
- a.addr[i] = ~0;
- n -= 32;
- }
- else
- {
- a.addr[i] = u32_mkmask(n);
- n = 0;
- }
- }
- return a;
-}
-
-unsigned
-ipv6_mklen(ip_addr *a)
-{
- int i, j, n;
-
- for(i=0, n=0; i<4; i++, n+=32)
- if (a->addr[i] != ~0U)
- {
- j = u32_masklen(a->addr[i]);
- if (j < 0)
- return j;
- n += j;
- while (++i < 4)
- if (a->addr[i])
- return -1;
- break;
- }
- return n;
-}
-
-int
-ipv6_classify(ip_addr *a)
-{
- u32 x = a->addr[0];
-
- if ((x & 0xe0000000) == 0x20000000) /* 2000::/3 Aggregatable Global Unicast Address */
- return IADDR_HOST | SCOPE_UNIVERSE;
- if ((x & 0xffc00000) == 0xfe800000) /* fe80::/10 Link-Local Address */
- return IADDR_HOST | SCOPE_LINK;
- if ((x & 0xffc00000) == 0xfec00000) /* fec0::/10 Site-Local Address */
- return IADDR_HOST | SCOPE_SITE;
- if ((x & 0xfe000000) == 0xfc000000) /* fc00::/7 Unique Local Unicast Address (RFC 4193) */
- return IADDR_HOST | SCOPE_SITE;
- if ((x & 0xff000000) == 0xff000000) /* ff00::/8 Multicast Address */
- {
- unsigned int scope = (x >> 16) & 0x0f;
- switch (scope)
- {
- case 1: return IADDR_MULTICAST | SCOPE_HOST;
- case 2: return IADDR_MULTICAST | SCOPE_LINK;
- case 5: return IADDR_MULTICAST | SCOPE_SITE;
- case 8: return IADDR_MULTICAST | SCOPE_ORGANIZATION;
- case 14: return IADDR_MULTICAST | SCOPE_UNIVERSE;
- default: return IADDR_MULTICAST | SCOPE_UNDEFINED;
- }
- }
- if (!x && !a->addr[1] && !a->addr[2])
- {
- u32 y = a->addr[3];
- if (y == 1)
- return IADDR_HOST | SCOPE_HOST; /* Loopback address */
- /* IPv4 compatible addresses */
- if (y >= 0x7f000000 && y < 0x80000000)
- return IADDR_HOST | SCOPE_HOST;
- if ((y & 0xff000000) == 0x0a000000 ||
- (y & 0xffff0000) == 0xc0a80000 ||
- (y & 0xfff00000) == 0xac100000)
- return IADDR_HOST | SCOPE_SITE;
- if (y >= 0x01000000 && y < 0xe0000000)
- return IADDR_HOST | SCOPE_UNIVERSE;
- }
- return IADDR_HOST | SCOPE_UNDEFINED;
-}
-
-void
-ipv6_hton(ip_addr *a)
-{
- int i;
-
- for(i=0; i<4; i++)
- a->addr[i] = htonl(a->addr[i]);
-}
-
-void
-ipv6_ntoh(ip_addr *a)
-{
- int i;
-
- for(i=0; i<4; i++)
- a->addr[i] = ntohl(a->addr[i]);
-}
-
-int
-ipv6_compare(ip_addr X, ip_addr Y)
-{
- int i;
- ip_addr *x = &X;
- ip_addr *y = &Y;
-
- for(i=0; i<4; i++)
- if (x->addr[i] > y->addr[i])
- return 1;
- else if (x->addr[i] < y->addr[i])
- return -1;
- return 0;
-}
-
-/*
- * Conversion of IPv6 address to presentation format and vice versa.
- * Heavily inspired by routines written by Paul Vixie for the BIND project
- * and of course by RFC 2373.
- */
-
-char *
-ip_ntop(ip_addr a, char *b)
-{
- u16 words[8];
- int bestpos, bestlen, curpos, curlen, i;
-
- /* First of all, preprocess the address and find the longest run of zeros */
- bestlen = bestpos = curpos = curlen = 0;
- for(i=0; i<8; i++)
- {
- u32 x = a.addr[i/2];
- words[i] = ((i%2) ? x : (x >> 16)) & 0xffff;
- if (words[i])
- curlen = 0;
- else
- {
- if (!curlen)
- curpos = i;
- curlen++;
- if (curlen > bestlen)
- {
- bestpos = curpos;
- bestlen = curlen;
- }
- }
- }
- if (bestlen < 2)
- bestpos = -1;
-
- /* Is it an encapsulated IPv4 address? */
- if (!bestpos &&
- (bestlen == 5 && a.addr[2] == 0xffff ||
- bestlen == 6))
- {
- u32 x = a.addr[3];
- b += bsprintf(b, "::%s%d.%d.%d.%d",
- a.addr[2] ? "ffff:" : "",
- ((x >> 24) & 0xff),
- ((x >> 16) & 0xff),
- ((x >> 8) & 0xff),
- (x & 0xff));
- return b;
- }
-
- /* Normal IPv6 formatting, compress the largest sequence of zeros */
- for(i=0; i<8; i++)
- {
- if (i == bestpos)
- {
- i += bestlen - 1;
- *b++ = ':';
- if (i == 7)
- *b++ = ':';
- }
- else
- {
- if (i)
- *b++ = ':';
- b += bsprintf(b, "%x", words[i]);
- }
- }
- *b = 0;
- return b;
-}
-
-char *
-ip_ntox(ip_addr a, char *b)
-{
- int i;
-
- for(i=0; i<4; i++)
- {
- if (i)
- *b++ = '.';
- b += bsprintf(b, "%08x", a.addr[i]);
- }
- return b;
-}
-
-int
-ipv4_pton_u32(char *a, u32 *o)
-{
- int i;
- unsigned long int l;
- u32 ia = 0;
-
- i=4;
- while (i--)
- {
- char *d, *c = strchr(a, '.');
- if (!c != !i)
- return 0;
- l = strtoul(a, &d, 10);
- if (d != c && *d || l > 255)
- return 0;
- ia = (ia << 8) | l;
- if (c)
- c++;
- a = c;
- }
- *o = ia;
- return 1;
-}
-
-int
-ip_pton(char *a, ip_addr *o)
-{
- u16 words[8];
- int i, j, k, l, hfil;
- char *start;
-
- if (a[0] == ':') /* Leading :: */
- {
- if (a[1] != ':')
- return 0;
- a++;
- }
- hfil = -1;
- i = 0;
- while (*a)
- {
- if (*a == ':') /* :: */
- {
- if (hfil >= 0)
- return 0;
- hfil = i;
- a++;
- continue;
- }
- j = 0;
- l = 0;
- start = a;
- for(;;)
- {
- if (*a >= '0' && *a <= '9')
- k = *a++ - '0';
- else if (*a >= 'A' && *a <= 'F')
- k = *a++ - 'A' + 10;
- else if (*a >= 'a' && *a <= 'f')
- k = *a++ - 'a' + 10;
- else
- break;
- j = (j << 4) + k;
- if (j >= 0x10000 || ++l > 4)
- return 0;
- }
- if (*a == ':' && a[1])
- a++;
- else if (*a == '.' && (i == 6 || i < 6 && hfil >= 0))
- { /* Embedded IPv4 address */
- u32 x;
- if (!ipv4_pton_u32(start, &x))
- return 0;
- words[i++] = x >> 16;
- words[i++] = x;
- break;
- }
- else if (*a)
- return 0;
- if (i >= 8)
- return 0;
- words[i++] = j;
- }
-
- /* Replace :: with an appropriate number of zeros */
- if (hfil >= 0)
- {
- j = 8 - i;
- for(i=7; i-j >= hfil; i--)
- words[i] = words[i-j];
- for(; i>=hfil; i--)
- words[i] = 0;
- }
-
- /* Convert the address to ip_addr format */
- for(i=0; i<4; i++)
- o->addr[i] = (words[2*i] << 16) | words[2*i+1];
- return 1;
-}
-
-void ipv6_absolutize(ip_addr *a, ip_addr *ifa)
-{
- if ((a->addr[0] & 0xffc00000) == 0xfe800000 && /* a is link-scope */
- ((ifa->addr[0] & 0xe0000000) == 0x20000000 | /* ifa is AGU ... */
- (ifa->addr[0] & 0xffc00000) == 0xfec00000)) /* ... or site-scope */
- {
- a->addr[0] = ifa->addr[0]; /* Copy the prefix, leave interface ID */
- a->addr[1] = ifa->addr[1];
- }
-}
-
-#ifdef TEST
-
-#include "bitops.c"
-
-static void test(char *x)
-{
- ip_addr a;
- char c[STD_ADDRESS_P_LENGTH+1];
-
- printf("%-40s ", x);
- if (!ip_pton(x, &a))
- {
- puts("BAD");
- return;
- }
- ip_ntop(a, c);
- printf("%-40s %04x\n", c, ipv6_classify(&a));
-}
-
-int main(void)
-{
- puts("Positive tests:");
- test("1:2:3:4:5:6:7:8");
- test("dead:beef:DEAD:BEEF::f00d");
- test("::");
- test("::1");
- test("1::");
- test("::1.234.5.6");
- test("::ffff:1.234.5.6");
- test("::fffe:1.234.5.6");
- test("1:2:3:4:5:6:7::8");
- test("2080::8:800:200c:417a");
- test("ff01::101");
-
- puts("Negative tests:");
- test(":::");
- test("1:2:3:4:5:6:7:8:");
- test("1::2::3");
- test("::12345");
- test("::1.2.3.4:5");
- test(":1:2:3:4:5:6:7:8");
- test("g:1:2:3:4:5:6:7");
- return 0;
-}
-
-#endif
+++ /dev/null
-
-/*
- * BIRD -- IP Addresses et Cetera for IPv6
- *
- * (c) 1999--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_IPV6_H_
-#define _BIRD_IPV6_H_
-
-#include <sys/types.h>
-#include <netinet/in.h>
-#include "lib/string.h"
-#include "lib/bitops.h"
-#include "lib/unaligned.h"
-
-typedef struct ipv6_addr {
- u32 addr[4];
-} ip_addr;
-
-#define _MI(a,b,c,d) ((struct ipv6_addr) {{ a, b, c, d }})
-#define _I0(a) ((a).addr[0])
-#define _I1(a) ((a).addr[1])
-#define _I2(a) ((a).addr[2])
-#define _I3(a) ((a).addr[3])
-
-#define MAX_PREFIX_LENGTH 128
-#define BITS_PER_IP_ADDRESS 128
-#define STD_ADDRESS_P_LENGTH 39
-#define SIZE_OF_IP_HEADER 40
-
-#define IPA_NONE _MI(0,0,0,0)
-
-#define ipa_equal(x,y) ({ ip_addr _a=(x), _b=(y); \
- _I0(_a) == _I0(_b) && \
- _I1(_a) == _I1(_b) && \
- _I2(_a) == _I2(_b) && \
- _I3(_a) == _I3(_b); })
-#define ipa_nonzero(x) ({ ip_addr _a=(x); (_I0(_a) || _I1(_a) || _I2(_a) || _I3(_a)); })
-#define ipa_and(x,y) ({ ip_addr _a=(x), _b=(y); \
- _MI(_I0(_a) & _I0(_b), \
- _I1(_a) & _I1(_b), \
- _I2(_a) & _I2(_b), \
- _I3(_a) & _I3(_b)); })
-#define ipa_or(x,y) ({ ip_addr _a=(x), _b=(y); \
- _MI(_I0(_a) | _I0(_b), \
- _I1(_a) | _I1(_b), \
- _I2(_a) | _I2(_b), \
- _I3(_a) | _I3(_b)); })
-#define ipa_xor(x,y) ({ ip_addr _a=(x), _b=(y); \
- _MI(_I0(_a) ^ _I0(_b), \
- _I1(_a) ^ _I1(_b), \
- _I2(_a) ^ _I2(_b), \
- _I3(_a) ^ _I3(_b)); })
-#define ipa_not(x) ({ ip_addr _a=(x); _MI(~_I0(_a),~_I1(_a),~_I2(_a),~_I3(_a)); })
-#define ipa_mkmask(x) ipv6_mkmask(x)
-#define ipa_mklen(x) ipv6_mklen(&(x))
-#define ipa_hash(x) ipv6_hash(&(x))
-#define ipa_hash32(x) ipv6_hash32(&(x))
-#define ipa_hton(x) ipv6_hton(&(x))
-#define ipa_ntoh(x) ipv6_ntoh(&(x))
-#define ipa_classify(x) ipv6_classify(&(x))
-#define ipa_has_link_scope(x) ipv6_has_link_scope(&(x))
-#define ipa_opposite_m1(x) ({ ip_addr _a=(x); _MI(_I0(_a),_I1(_a),_I2(_a),_I3(_a) ^ 1); })
-#define ipa_opposite_m2(x) ({ ip_addr _a=(x); _MI(_I0(_a),_I1(_a),_I2(_a),_I3(_a) ^ 3); })
-/* ipa_class_mask don't make sense with IPv6 */
-/* ipa_from_u32 and ipa_to_u32 replaced by ipa_build */
-#define ipa_build(a,b,c,d) _MI(a,b,c,d)
-#define ipa_compare(x,y) ipv6_compare(x,y)
-/* ipa_pxlen() requires that x != y */
-#define ipa_pxlen(x, y) ipv6_pxlen(x, y)
-#define ipa_getbit(x, y) ipv6_getbit(x, y)
-#define ipa_put_addr(x, y) ipv6_put_addr(x, y)
-#define ipa_absolutize(x,y) ipv6_absolutize(x,y)
-
-/* In IPv6, SOCK_RAW does not return packet header */
-#define ip_skip_header(x, y) x
-
-ip_addr ipv6_mkmask(unsigned);
-unsigned ipv6_mklen(ip_addr *);
-int ipv6_classify(ip_addr *);
-void ipv6_hton(ip_addr *);
-void ipv6_ntoh(ip_addr *);
-int ipv6_compare(ip_addr, ip_addr);
-int ipv4_pton_u32(char *, u32 *);
-void ipv6_absolutize(ip_addr *, ip_addr *);
-
-static inline int ipv6_has_link_scope(ip_addr *a)
-{
- return ((a->addr[0] & 0xffc00000) == 0xfe800000);
-}
-
-/*
- * This hash function looks well, but once IPv6 enters
- * mainstream use, we need to check that it has good
- * distribution properties on real routing tables.
- */
-
-static inline unsigned ipv6_hash(ip_addr *a)
-{
- /* Returns a 16-bit hash key */
- u32 x = _I0(*a) ^ _I1(*a) ^ _I2(*a) ^ _I3(*a);
- return (x ^ (x >> 16) ^ (x >> 8)) & 0xffff;
-}
-
-static inline u32 ipv6_hash32(ip_addr *a)
-{
- /* Returns a 32-bit hash key, although low-order bits are not ixed */
- u32 x = _I0(*a) ^ _I1(*a) ^ _I2(*a) ^ _I3(*a);
- return x ^ (x << 16) ^ (x << 24);
-}
-
-static inline u32 ipv6_getbit(ip_addr a, u32 y)
-{
- return a.addr[y / 32] & (0x80000000 >> (y % 32));
-}
-
-static inline u32 ipv6_pxlen(ip_addr a, ip_addr b)
-{
- int i = 0;
- i+= (a.addr[i] == b.addr[i]);
- i+= (a.addr[i] == b.addr[i]);
- i+= (a.addr[i] == b.addr[i]);
- i+= (a.addr[i] == b.addr[i]);
- return 32 * i + 31 - u32_log2(a.addr[i] ^ b.addr[i]);
-}
-
-static inline byte * ipv6_put_addr(byte *buf, ip_addr a)
-{
- put_u32(buf+0, _I0(a));
- put_u32(buf+4, _I1(a));
- put_u32(buf+8, _I2(a));
- put_u32(buf+12, _I3(a));
- return buf+16;
-}
-
-#define IP_PREC_INTERNET_CONTROL 0xc0
-
-#endif
/* IP address */
case 'I':
if (flags & SPECIAL)
- ip_ntox(va_arg(args, ip_addr), ipbuf);
+ ipa_ntox(va_arg(args, ip_addr), ipbuf);
else {
- ip_ntop(va_arg(args, ip_addr), ipbuf);
+ ipa_ntop(va_arg(args, ip_addr), ipbuf);
if (field_width == 1)
field_width = STD_ADDRESS_P_LENGTH;
}
int sk_set_icmp6_filter(sock *s, int p1, int p2);
void sk_log_error(sock *s, const char *p);
+byte * sk_rx_buffer(sock *s, int *len); /* Temporary */
+
extern int sk_priority_control; /* Suggested priority for control traffic, should be sysdep define */
if (p->cf->next_hop_self ||
rta->dest != RTD_ROUTER ||
ipa_equal(rta->gw, IPA_NONE) ||
- ipa_has_link_scope(rta->gw) ||
+ ipa_is_link_local(rta->gw) ||
(!p->is_internal && !p->cf->next_hop_keep &&
(!p->neigh || (rta->iface != p->neigh->iface))))
set_next_hop(z, p->source_addr);
s->password = p->cf->password;
s->tx_hook = bgp_connected;
BGP_TRACE(D_EVENTS, "Connecting to %I%J from local address %I%J", s->daddr, p->cf->iface,
- s->saddr, ipa_has_link_scope(s->saddr) ? s->iface : NULL);
+ s->saddr, ipa_is_link_local(s->saddr) ? s->iface : NULL);
bgp_setup_conn(p, conn);
bgp_setup_sk(conn, s);
bgp_conn_set_state(conn, BS_CONNECT);
{
struct bgp_proto *p = (struct bgp_proto *) pc->proto;
if (ipa_equal(p->cf->remote_ip, sk->daddr) &&
- (!ipa_has_link_scope(sk->daddr) || (p->cf->iface == sk->iface)))
+ (!ipa_is_link_local(sk->daddr) || (p->cf->iface == sk->iface)))
{
/* We are in proper state and there is no other incoming connection */
int acc = (p->p.proto_state == PS_START || p->p.proto_state == PS_UP) &&
}
BGP_TRACE(D_EVENTS, "Incoming connection from %I%J (port %d) %s",
- sk->daddr, ipa_has_link_scope(sk->daddr) ? sk->iface : NULL,
+ sk->daddr, ipa_is_link_local(sk->daddr) ? sk->iface : NULL,
sk->dport, acc ? "accepted" : "rejected");
if (!acc)
}
log(L_WARN "BGP: Unexpected connect from unknown address %I%J (port %d)",
- sk->daddr, ipa_has_link_scope(sk->daddr) ? sk->iface : NULL, sk->dport);
+ sk->daddr, ipa_is_link_local(sk->daddr) ? sk->iface : NULL, sk->dport);
reject:
rfree(sk);
return 0;
if (c->multihop && (c->gw_mode == GW_DIRECT))
cf_error("Multihop BGP cannot use direct gateway mode");
- if (c->multihop && (ipa_has_link_scope(c->remote_ip) ||
- ipa_has_link_scope(c->source_addr)))
+ if (c->multihop && (ipa_is_link_local(c->remote_ip) ||
+ ipa_is_link_local(c->source_addr)))
cf_error("Multihop BGP cannot be used with link-local addresses");
if (c->multihop && c->bfd && ipa_zero(c->source_addr))
| bgp_proto NEIGHBOR ipa ipa_scope ipa_port AS expr ';' {
if (ipa_nonzero(BGP_CFG->remote_ip))
cf_error("Only one neighbor per BGP instance is allowed");
- if (!ipa_has_link_scope($3) != !$4)
+ if (!ipa_is_link_local($3) != !$4)
cf_error("Link-local address and interface scope must be used together");
BGP_CFG->remote_ip = $3;
put_u16(buf+0, (p->neigh && p->neigh->iface) ? p->neigh->iface->index : 0);
put_u16(buf+2, BGP_AF);
buf+=4;
- buf = ipa_put_addr(buf, conn->sk ? conn->sk->daddr : IPA_NONE);
- buf = ipa_put_addr(buf, conn->sk ? conn->sk->saddr : IPA_NONE);
+ buf = put_ipa(buf, conn->sk ? conn->sk->daddr : IPA_NONE);
+ buf = put_ipa(buf, conn->sk ? conn->sk->saddr : IPA_NONE);
return buf;
}
*tmp++ = BGP_AF_IPV6;
*tmp++ = 1;
- if (ipa_has_link_scope(ip))
+ if (ipa_is_link_local(ip))
ip = IPA_NONE;
if (ipa_nonzero(ip_ll))
int second = (nh->u.ptr->length == NEXT_HOP_LENGTH) && ipa_nonzero(nexthop[1]);
/* First address should not be link-local, but may be zero in direct mode */
- if (ipa_has_link_scope(*nexthop))
+ if (ipa_is_link_local(*nexthop))
*nexthop = IPA_NONE;
#else
int second = 0;
#endif
-#define IP4_MIN_MTU 576
-#define IP6_MIN_MTU 1280
-
-#define IP4_OSPF_ALL_ROUTERS ipa_build4(224, 0, 0, 5)
-#define IP4_OSPF_DES_ROUTERS ipa_build4(224, 0, 0, 6)
-
-#define IP6_OSPF_ALL_ROUTERS ipa_build6(0xFF020000, 0, 0, 5)
-#define IP6_OSPF_DES_ROUTERS ipa_build6(0xFF020000, 0, 0, 6)
-
#ifdef IPV6
-#define ip4_addr u32
-#define ip6_addr ip_addr
-#define _MI6(x1,x2,x3,x4) _MI(x1, x2, x3, x4)
-#define ipa_is_link_local(x) ipa_has_link_scope(x)
-#define ipa_from_u32(x) _MI6(0,0,0xffff,x)
-#define ipa_to_u32(x) _I3(x)
-#define ipa_build4(a,b,c,d) IPA_NONE
-#define ipa_build6(a,b,c,d) _MI6(a,b,c,d)
#define OSPF_IS_V2 0
#else
-#define ip4_addr u32
-#define ip6_addr ip_addr
-#define _I0(X) 0
-#define _I1(X) 0
-#define _I2(X) 0
-#define _I3(X) 0
-#define _MI6(x1,x2,x3,x4) IPA_NONE
-#define ipa_is_link_local(x) 0
-#define ipa_build4(a,b,c,d) _MI(((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
-#define ipa_build6(a,b,c,d) IPA_NONE
#define OSPF_IS_V2 1
#endif
#define ipa_from_rid(x) ipa_from_u32(x)
#define ipa_to_rid(x) ipa_to_u32(x)
-
#define IPV6_PREFIX_SPACE(x) ((((x) + 63) / 32) * 4)
#define IPV6_PREFIX_WORDS(x) (((x) + 63) / 32)
+/* FIXME: these four functions should be significantly redesigned w.r.t. integration,
+ also should be named as ospf3_* instead of *_ipv6_* */
+
static inline u32 *
lsa_get_ipv6_prefix(u32 *buf, ip_addr *addr, int *pxlen, u8 *pxopts, u16 *rest)
{
static inline u32 *
put_ipv6_prefix(u32 *buf, ip_addr addr, u8 pxlen, u8 pxopts, u16 lh)
{
+#ifdef IPV6
*buf++ = ((pxlen << 24) | (pxopts << 16) | lh);
if (pxlen > 0)
*buf++ = _I2(addr);
if (pxlen > 96)
*buf++ = _I3(addr);
+#endif
return buf;
}
}
/* Second, we check packet length, checksum, and the protocol version */
- struct ospf_packet *pkt = (struct ospf_packet *) ip_skip_header(sk->rbuf, &len);
+ struct ospf_packet *pkt = (void *) sk_rx_buffer(sk, &len);
+
if (pkt == NULL)
DROP("bad IP header", len);
struct ospf_lsa_link *llsa = lhe->lsa_body;
- if (ipa_zero(llsa->lladdr))
+ if (ip6_zero(llsa->lladdr))
return NULL;
- return new_nexthop(p, llsa->lladdr, pn->iface, pn->weight);
+ return new_nexthop(p, ipa_from_ip6(llsa->lladdr), pn->iface, pn->weight);
}
}
ASSERT(p->lsab_used == 0);
ll = lsab_allocz(p, sizeof(struct ospf_lsa_link));
ll->options = ifa->oa->options | (ifa->priority << 24);
- ll->lladdr = ifa->addr->ip;
+ ll->lladdr = ipa_to_ip6(ifa->addr->ip);
ll = NULL; /* buffer might be reallocated later */
struct ifa *a;
}
RADV_TRACE(D_PACKETS, "Sending RA via %s", ifa->iface->name);
- sk_send_to(ifa->sk, ifa->plen, AllNodes, 0);
+ sk_send_to(ifa->sk, ifa->plen, IP6_ALL_NODES, 0);
}
if (sk_setup_multicast(sk) < 0)
goto err;
- if (sk_join_group(sk, AllRouters) < 0)
+ if (sk_join_group(sk, IP6_ALL_ROUTERS) < 0)
goto err;
ifa->sk = sk;
#define ICMPV6_PROTO 58
-#define AllNodes _MI(0xFF020000, 0, 0, 1) /* FF02::1 */
-#define AllRouters _MI(0xFF020000, 0, 0, 2) /* FF02::2 */
-
#define ICMPV6_RS 133
#define ICMPV6_RA 134
A.flags = 0;
#ifndef IPV6
A.gw = ipa_nonzero(b->nexthop) ? b->nexthop : whotoldme;
- pxlen = ipa_mklen(b->netmask);
+ pxlen = ipa_masklen(b->netmask);
#else
/* FIXME: next hop is in other packet for v6 */
A.gw = whotoldme;
#ifndef IPV6
metric = ntohl( block->metric );
- pxlen = ipa_mklen(block->netmask);
+ pxlen = ipa_masklen(block->netmask);
#else
metric = block->metric;
pxlen = block->pxlen;
ipa_ntoh( block->netmask );
ipa_ntoh( block->nexthop );
if (packet->heading.version == RIP_V1) /* FIXME (nonurgent): switch to disable this? */
- block->netmask = ipa_class_mask(block->network);
+ block->netmask = ip4_class_mask(ipa_to_ip4(block->network));
#endif
process_block( p, block, whotoldme, iface );
}
#ifndef IPV6
rif->sock->daddr = ipa_from_u32(0xe0000009);
#else
- rif->sock->daddr = ipa_build(0xff020000, 0, 0, 9);
+ rif->sock->daddr = IP6_RIP_ROUTERS;
#endif
} else {
rif->sock->daddr = new->addr->brd;
#ifndef IPV6
lock->addr = ipa_from_u32(0xe0000009);
#else
- ip_pton("FF02::9", &lock->addr);
+ lock->addr = IP6_RIP_ROUTERS;
#endif
else
lock->addr = iface->addr->brd;
if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
SKIP("strange class/scope\n");
- int pxlen = (flags & RTF_HOST) ? MAX_PREFIX_LENGTH : ipa_mklen(imask);
+ int pxlen = (flags & RTF_HOST) ? MAX_PREFIX_LENGTH : ipa_masklen(imask);
if (pxlen < 0)
{ log(L_ERR "%s (%I) - netmask %I", errmsg, idst, imask); return; }
ibrd = ipa_from_sa(&brd);
- if ((masklen = ipa_mklen(imask)) < 0)
+ if ((masklen = ipa_masklen(imask)) < 0)
{
log(L_ERR "KIF: Invalid masklen %I for %s", imask, iface->name);
return;
return 0;
}
+static inline byte *
+sk_skip_ip_header(byte *pkt, int *len)
+{
+ if ((*len < 20) || ((*pkt & 0xf0) != 0x40))
+ return NULL;
+
+ int hlen = (*pkt & 0x0f) * 4;
+ if ((hlen < 20) || (hlen > *len))
+ return NULL;
+
+ *len -= hlen;
+ return pkt + hlen;
+}
+
+byte *
+sk_rx_buffer(sock *s, int *len)
+{
+ if (sk_is_ipv4(s) && (s->type == SK_IP))
+ return sk_skip_ip_header(s->rbuf, len);
+ else
+ return s->rbuf;
+}
+
/*
* Public socket functions
#ifdef IPV6
#define BIRD_AF AF_INET6
-#define _MI6(x1,x2,x3,x4) _MI(x1, x2, x3, x4)
-#define ipa_is_link_local(x) ipa_has_link_scope(x)
#define ipa_from_sa(x) ipa_from_sa6(x)
-#define ipa_from_u32(x) _MI6(0,0,0xffff,x)
-#define ipa_to_u32(x) _I3(x)
#else
#define BIRD_AF AF_INET
-#define _I0(X) 0
-#define _I1(X) 0
-#define _I2(X) 0
-#define _I3(X) 0
-#define _MI6(x1,x2,x3,x4) IPA_NONE
-#define ipa_is_link_local(x) 0
#define ipa_from_sa(x) ipa_from_sa4(x)
#endif
{ return ipa_from_u32(ntohl(a.s_addr)); }
static inline ip_addr ipa_from_in6(struct in6_addr a)
-{ return _MI6(ntohl(a.s6_addr32[0]), ntohl(a.s6_addr32[1]), ntohl(a.s6_addr32[2]), ntohl(a.s6_addr32[3])); }
+{ return ipa_build6(ntohl(a.s6_addr32[0]), ntohl(a.s6_addr32[1]), ntohl(a.s6_addr32[2]), ntohl(a.s6_addr32[3])); }
static inline ip_addr ipa_from_sa4(sockaddr *sa)
{ return ipa_from_in4(((struct sockaddr_in *) sa)->sin_addr); }
static inline struct in_addr ipa_to_in4(ip_addr a)
{ return (struct in_addr) { htonl(ipa_to_u32(a)) }; }
+#ifdef IPV6
static inline struct in6_addr ipa_to_in6(ip_addr a)
{ return (struct in6_addr) { .s6_addr32 = { htonl(_I0(a)), htonl(_I1(a)), htonl(_I2(a)), htonl(_I3(a)) } }; }
+#else
+/* Temporary dummy */
+static inline struct in6_addr ipa_to_in6(ip_addr a)
+{ return (struct in6_addr) { .s6_addr32 = { 0, 0, 0, 0 } }; }
+#endif
void sockaddr_fill(sockaddr *sa, int af, ip_addr a, struct iface *ifa, uint port);
int sockaddr_read(sockaddr *sa, int af, ip_addr *a, struct iface **ifa, uint *port);
projects / thirdparty / bird.git / commitdiff
