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-rw-r--r--usr.sbin/pim6dd/inet6.c288
1 files changed, 288 insertions, 0 deletions
diff --git a/usr.sbin/pim6dd/inet6.c b/usr.sbin/pim6dd/inet6.c
new file mode 100644
index 0000000..7dc9ace
--- /dev/null
+++ b/usr.sbin/pim6dd/inet6.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (C) 1998 WIDE Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include "defs.h"
+
+int
+inet6_uvif2scopeid(struct sockaddr_in6 *sa, struct uvif *v)
+{
+ if (IN6_IS_ADDR_MULTICAST(&sa->sin6_addr)) {
+ if (IN6_IS_ADDR_MC_LINKLOCAL(&sa->sin6_addr))
+ return(v->uv_ifindex);
+ if (IN6_IS_ADDR_MC_SITELOCAL(&sa->sin6_addr))
+ return(v->uv_siteid);
+ }
+ else {
+ if (IN6_IS_ADDR_LINKLOCAL(&sa->sin6_addr))
+ return(v->uv_ifindex);
+
+ if (IN6_IS_ADDR_SITELOCAL(&sa->sin6_addr))
+ return(v->uv_siteid);
+ }
+
+ return(0);
+}
+
+int
+inet6_localif_address(struct sockaddr_in6 *sa, struct uvif *v)
+{
+ struct phaddr *pa;
+
+ for (pa = v->uv_addrs; pa; pa = pa->pa_next)
+ if (inet6_equal(sa, &pa->pa_addr))
+ return(TRUE);
+
+ return(FALSE);
+}
+
+int
+inet6_valid_host(struct sockaddr_in6 *addr)
+{
+ if (IN6_IS_ADDR_MULTICAST(&addr->sin6_addr))
+ return(FALSE);
+
+ return(TRUE);
+}
+
+int
+inet6_equal(struct sockaddr_in6 *sa1, struct sockaddr_in6 *sa2)
+{
+ if (sa1->sin6_scope_id == sa2->sin6_scope_id &&
+ IN6_ARE_ADDR_EQUAL(&sa1->sin6_addr, &sa2->sin6_addr))
+ return(1);
+
+ return(0);
+}
+
+int
+inet6_lessthan(struct sockaddr_in6 *sa1, struct sockaddr_in6 *sa2)
+{
+ u_int32_t s32_1, s32_2;
+ int i;
+
+ if (sa1->sin6_scope_id < sa2->sin6_scope_id)
+ return(1);
+ if (sa1->sin6_scope_id == sa2->sin6_scope_id) {
+ for (i = 0; i < 4; i++) {
+ s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
+ s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
+
+ if (s32_1 > s32_2)
+ return(0);
+ if (s32_1 < s32_2)
+ return(1);
+
+ /* otherwide, continue to compare */
+ }
+ }
+
+ return(0);
+}
+
+int
+inet6_lessoreq(struct sockaddr_in6 *sa1, struct sockaddr_in6 *sa2)
+{
+ u_int32_t s32_1, s32_2;
+ int i;
+
+ if (sa1->sin6_scope_id < sa2->sin6_scope_id)
+ return(1);
+ if (sa1->sin6_scope_id == sa2->sin6_scope_id) {
+ for (i = 0; i < 4; i++) {
+ s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
+ s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
+
+ if (s32_1 > s32_2)
+ return(0);
+ if (s32_1 < s32_2)
+ return(1);
+
+ /* otherwide, continue to compare */
+ }
+ /* sa1 == sa2 */
+ return(1);
+ }
+
+ return(0);
+}
+
+int
+inet6_greaterthan(struct sockaddr_in6 *sa1, struct sockaddr_in6 *sa2)
+{
+ u_int32_t s32_1, s32_2;
+ int i;
+
+ if (sa1->sin6_scope_id > sa2->sin6_scope_id)
+ return(1);
+ if (sa1->sin6_scope_id == sa2->sin6_scope_id) {
+ for (i = 0; i < 4; i++) {
+ s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
+ s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
+
+ if (s32_1 < s32_2)
+ return(0);
+ if (s32_1 > s32_2)
+ return(1);
+
+ /* otherwide, continue to compare */
+ }
+ }
+
+ return(0);
+}
+
+int
+inet6_greateroreq(struct sockaddr_in6 *sa1, struct sockaddr_in6 *sa2)
+{
+ u_int32_t s32_1, s32_2;
+ int i;
+
+ if (sa1->sin6_scope_id > sa2->sin6_scope_id)
+ return(1);
+ if (sa1->sin6_scope_id == sa2->sin6_scope_id) {
+ for (i = 0; i < 4; i++) {
+ s32_1 = ntohl(*(u_int32_t *)&sa1->sin6_addr.s6_addr[i * 4]);
+ s32_2 = ntohl(*(u_int32_t *)&sa2->sin6_addr.s6_addr[i * 4]);
+
+ if (s32_1 < s32_2)
+ return(0);
+ if (s32_1 > s32_2)
+ return(1);
+
+ /* otherwide, continue to compare */
+ }
+ /* sa1 == sa2 */
+ return(1);
+ }
+
+ return(0);
+}
+
+int
+inet6_match_prefix(sa1, sa2, mask)
+ struct sockaddr_in6 *sa1, *sa2;
+ struct in6_addr *mask;
+{
+ int i;
+
+ if (sa1->sin6_scope_id != sa2->sin6_scope_id)
+ return(0);
+
+ for (i = 0; i < 16; i++) {
+ if ((sa1->sin6_addr.s6_addr[i] ^ sa2->sin6_addr.s6_addr[i]) &
+ mask->s6_addr[i])
+ return(0);
+ }
+
+ return(1);
+}
+
+char *
+inet6_fmt(struct in6_addr *addr)
+{
+ static char ip6buf[8][INET6_ADDRSTRLEN];
+ static int ip6round = 0;
+ char *cp;
+
+ ip6round = (ip6round + 1) & 7;
+ cp = ip6buf[ip6round];
+
+ inet_ntop(AF_INET6, addr, cp, INET6_ADDRSTRLEN);
+ return(cp);
+}
+
+char *
+ifindex2str(int ifindex)
+{
+ static char ifname[IFNAMSIZ];
+
+ return(if_indextoname(ifindex, ifname));
+}
+
+int
+inet6_mask2plen(struct in6_addr *mask)
+{
+ int masklen;
+ u_char *p = (u_char *)mask;
+ u_char *lim = p + 16;
+
+ for (masklen = 0; p < lim; p++) {
+ switch (*p) {
+ case 0xff:
+ masklen += 8;
+ break;
+ case 0xfe:
+ masklen += 7;
+ break;
+ case 0xfc:
+ masklen += 6;
+ break;
+ case 0xf8:
+ masklen += 5;
+ break;
+ case 0xf0:
+ masklen += 4;
+ break;
+ case 0xe0:
+ masklen += 3;
+ break;
+ case 0xc0:
+ masklen += 2;
+ break;
+ case 0x80:
+ masklen += 1;
+ break;
+ case 0x00:
+ break;
+ }
+ }
+
+ return(masklen);
+}
+
+char *
+net6name(struct in6_addr *prefix, struct in6_addr *mask)
+{
+ static char ip6buf[8][INET6_ADDRSTRLEN + 4]; /* length of addr/plen */
+ static int ip6round = 0;
+ char *cp;
+
+ ip6round = (ip6round + 1) & 7;
+ cp = ip6buf[ip6round];
+
+ inet_ntop(AF_INET6, prefix, cp, INET6_ADDRSTRLEN);
+ cp += strlen(cp);
+ *cp = '/';
+ cp++;
+ sprintf(cp, "%d", inet6_mask2plen(mask));
+
+ return(ip6buf[ip6round]);
+}
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