diff options
Diffstat (limited to 'src/libfreeswan/sameaddr.c')
| -rw-r--r-- | src/libfreeswan/sameaddr.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/src/libfreeswan/sameaddr.c b/src/libfreeswan/sameaddr.c deleted file mode 100644 index 47daaa4ee..000000000 --- a/src/libfreeswan/sameaddr.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * comparisons - * Copyright (C) 2000 Henry Spencer. - * - * This library is free software; you can redistribute it and/or modify it - * under the terms of the GNU Library General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/lgpl.txt>. - * - * This library is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public - * License for more details. - */ -#include "internal.h" -#include "freeswan.h" - -static int samenbits(const ip_address *a, const ip_address *b, int n); - -/* - - addrcmp - compare two addresses - * Caution, the order of the tests is subtle: doing type test before - * size test can yield cases where a<b, b<c, but a>c. - */ -int /* like memcmp */ -addrcmp(a, b) -const ip_address *a; -const ip_address *b; -{ - int at = addrtypeof(a); - int bt = addrtypeof(b); - const unsigned char *ap; - const unsigned char *bp; - size_t as = addrbytesptr(a, &ap); - size_t bs = addrbytesptr(b, &bp); - size_t n = (as < bs) ? as : bs; /* min(as, bs) */ - int c = memcmp(ap, bp, n); - - if (c != 0) /* bytes differ */ - return (c < 0) ? -1 : 1; - if (as != bs) /* comparison incomplete: lexical order */ - return (as < bs) ? -1 : 1; - if (at != bt) /* bytes same but not same type: break tie */ - return (at < bt) ? -1 : 1; - return 0; -} - -/* - - sameaddr - are two addresses the same? - */ -int -sameaddr(a, b) -const ip_address *a; -const ip_address *b; -{ - return (addrcmp(a, b) == 0) ? 1 : 0; -} - -/* - - samesubnet - are two subnets the same? - */ -int -samesubnet(a, b) -const ip_subnet *a; -const ip_subnet *b; -{ - if (!sameaddr(&a->addr, &b->addr)) /* also does type check */ - return 0; - if (a->maskbits != b->maskbits) - return 0; - return 1; -} - -/* - - subnetishost - is a subnet in fact a single host? - */ -int -subnetishost(a) -const ip_subnet *a; -{ - return (a->maskbits == addrlenof(&a->addr)*8) ? 1 : 0; -} - -/* - - samesaid - are two SA IDs the same? - */ -int -samesaid(a, b) -const ip_said *a; -const ip_said *b; -{ - if (a->spi != b->spi) /* test first, most likely to be different */ - return 0; - if (!sameaddr(&a->dst, &b->dst)) - return 0; - if (a->proto != b->proto) - return 0; - return 1; -} - -/* - - sameaddrtype - do two addresses have the same type? - */ -int -sameaddrtype(a, b) -const ip_address *a; -const ip_address *b; -{ - return (addrtypeof(a) == addrtypeof(b)) ? 1 : 0; -} - -/* - - samesubnettype - do two subnets have the same type? - */ -int -samesubnettype(a, b) -const ip_subnet *a; -const ip_subnet *b; -{ - return (subnettypeof(a) == subnettypeof(b)) ? 1 : 0; -} - -/* - - addrinsubnet - is this address in this subnet? - */ -int -addrinsubnet(a, s) -const ip_address *a; -const ip_subnet *s; -{ - if (addrtypeof(a) != subnettypeof(s)) - return 0; - if (!samenbits(a, &s->addr, s->maskbits)) - return 0; - return 1; -} - -/* - - subnetinsubnet - is one subnet within another? - */ -int -subnetinsubnet(a, b) -const ip_subnet *a; -const ip_subnet *b; -{ - if (subnettypeof(a) != subnettypeof(b)) - return 0; - if (a->maskbits < b->maskbits) /* a is bigger than b */ - return 0; - if (!samenbits(&a->addr, &b->addr, b->maskbits)) - return 0; - return 1; -} - -/* - - samenbits - do two addresses have the same first n bits? - */ -static int -samenbits(a, b, nbits) -const ip_address *a; -const ip_address *b; -int nbits; -{ - const unsigned char *ap; - const unsigned char *bp; - size_t n; - int m; - - if (addrtypeof(a) != addrtypeof(b)) - return 0; /* arbitrary */ - n = addrbytesptr(a, &ap); - if (n == 0) - return 0; /* arbitrary */ - (void) addrbytesptr(b, &bp); - if (nbits > n*8) - return 0; /* "can't happen" */ - - for (; nbits >= 8 && *ap == *bp; nbits -= 8, ap++, bp++) - continue; - if (nbits >= 8) - return 0; - if (nbits > 0) { /* partial byte */ - m = ~(0xff >> nbits); - if ((*ap & m) != (*bp & m)) - return 0; - } - return 1; -} |