diff options
Diffstat (limited to 'usr/src/lib/libinetutil/common/inetutil.c')
| -rw-r--r-- | usr/src/lib/libinetutil/common/inetutil.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/usr/src/lib/libinetutil/common/inetutil.c b/usr/src/lib/libinetutil/common/inetutil.c new file mode 100644 index 0000000000..195d080b79 --- /dev/null +++ b/usr/src/lib/libinetutil/common/inetutil.c @@ -0,0 +1,97 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright 2009 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#include <unistd.h> +#include <netinet/in.h> +#include <libinetutil.h> + +extern int getnetmaskbyaddr(const struct in_addr, struct in_addr *); + +/* + * Internet utility functions. + */ + +/* + * Given a host-order address, calculate client's default net mask. + * Consult netmasks database to see if net is further subnetted. + * We'll only snag the first netmask that matches our criteria. + * We return the resultant netmask in host order. + */ +void +get_netmask4(const struct in_addr *n_addrp, struct in_addr *s_addrp) +{ + struct in_addr hp, tp; + + /* + * First check if VLSM is in use. + */ + hp.s_addr = htonl(n_addrp->s_addr); + if (getnetmaskbyaddr(hp, &tp) == 0) { + s_addrp->s_addr = ntohl(tp.s_addr); + return; + } + + /* + * Fall back on standard classed networks. + */ + if (IN_CLASSA(n_addrp->s_addr)) + s_addrp->s_addr = IN_CLASSA_NET; + else if (IN_CLASSB(n_addrp->s_addr)) + s_addrp->s_addr = IN_CLASSB_NET; + else if (IN_CLASSC(n_addrp->s_addr)) + s_addrp->s_addr = IN_CLASSC_NET; + else + s_addrp->s_addr = IN_CLASSE_NET; +} + +/* + * Checks if the IP addresses `ssp1' and `ssp2' are equal. + */ +boolean_t +sockaddrcmp(const struct sockaddr_storage *ssp1, + const struct sockaddr_storage *ssp2) +{ + struct in_addr addr1, addr2; + const struct in6_addr *addr6p1, *addr6p2; + + if (ssp1->ss_family != ssp2->ss_family) + return (B_FALSE); + + if (ssp1 == ssp2) + return (B_TRUE); + + switch (ssp1->ss_family) { + case AF_INET: + addr1 = ((const struct sockaddr_in *)ssp1)->sin_addr; + addr2 = ((const struct sockaddr_in *)ssp2)->sin_addr; + return (addr1.s_addr == addr2.s_addr); + case AF_INET6: + addr6p1 = &((const struct sockaddr_in6 *)ssp1)->sin6_addr; + addr6p2 = &((const struct sockaddr_in6 *)ssp2)->sin6_addr; + return (IN6_ARE_ADDR_EQUAL(addr6p1, addr6p2)); + } + return (B_FALSE); +} |