map: be less restrictive when matching lw4over6 prefixes
Signed-off-by: Steven Barth <steven@midlink.org> SVN-Revision: 46819
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48fe93ea6b
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1b91cd2663
2 changed files with 11 additions and 6 deletions
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
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PKG_NAME:=map
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PKG_VERSION:=4
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PKG_RELEASE:=4
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PKG_RELEASE:=5
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PKG_LICENSE:=GPL-2.0
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include $(INCLUDE_DIR)/package.mk
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@ -3,6 +3,7 @@
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*
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* Author: Steven Barth <cyrus@openwrt.org>
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* Copyright (c) 2014-2015 cisco Systems, Inc.
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* Copyright (c) 2015 Steven Barth <cyrus@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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@ -112,7 +113,7 @@ static void handle_dump(struct ubus_request *req __attribute__((unused)),
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}
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static void match_prefix(int *pdlen, struct in6_addr *pd, struct blob_attr *cur,
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const struct in6_addr *ipv6prefix, int prefix6len)
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const struct in6_addr *ipv6prefix, int prefix6len, bool lw4o6)
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{
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struct blob_attr *d;
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unsigned drem;
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@ -133,13 +134,17 @@ static void match_prefix(int *pdlen, struct in6_addr *pd, struct blob_attr *cur,
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inet_pton(AF_INET6, blobmsg_get_string(ptb[PREFIX_ATTR_ADDRESS]), &prefix);
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// lw4over6 /128-address-as-PD matching madness workaround
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if (mask == 128)
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if (lw4o6 && mask == 128)
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mask = 64;
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if (*pdlen < mask && mask >= prefix6len &&
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!bmemcmp(&prefix, ipv6prefix, prefix6len)) {
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bmemcpy(pd, &prefix, mask);
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*pdlen = mask;
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} else if (lw4o6 && *pdlen < prefix6len && mask < prefix6len &&
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!bmemcmp(&prefix, ipv6prefix, mask)) {
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bmemcpy(pd, ipv6prefix, prefix6len);
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*pdlen = prefix6len;
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}
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}
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}
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@ -237,7 +242,7 @@ int main(int argc, char *argv[])
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ealen = intval;
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} else if (idx == OPT_PREFIX4LEN && (intval = strtoul(value, NULL, 0)) <= 32 && !errno) {
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prefix4len = intval;
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} else if (idx == OPT_PREFIX6LEN && (intval = strtoul(value, NULL, 0)) <= 112 && !errno) {
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} else if (idx == OPT_PREFIX6LEN && (intval = strtoul(value, NULL, 0)) <= 128 && !errno) {
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prefix6len = intval;
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} else if (idx == OPT_IPV4PREFIX && inet_pton(AF_INET, value, &ipv4prefix) == 1) {
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// dummy
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@ -289,10 +294,10 @@ int main(int argc, char *argv[])
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blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]))))
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continue;
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match_prefix(&pdlen, &pd, tb[IFACE_ATTR_PREFIX], &ipv6prefix, prefix6len);
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match_prefix(&pdlen, &pd, tb[IFACE_ATTR_PREFIX], &ipv6prefix, prefix6len, lw4o6);
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if (lw4o6)
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match_prefix(&pdlen, &pd, tb[IFACE_ATTR_ADDRESS], &ipv6prefix, prefix6len);
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match_prefix(&pdlen, &pd, tb[IFACE_ATTR_ADDRESS], &ipv6prefix, prefix6len, lw4o6);
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if (pdlen >= 0) {
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iface = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
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