netdev - [PATCH iproute2-next 2/8] ipaddress: Use get_addr

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Date:   Mon, 22 Jan 2018 19:26:12 +0200
From:   Serhey Popovych <serhe.popovych@...il.com>
To:     netdev@...r.kernel.org
Subject: [PATCH iproute2-next 2/8] ipaddress: Use get_addr_rta()

Setting ->family in @inet_prefix seems pointless:
inet_addr_match() does not consider it's value:
better is to force get_addr_rta() to use address
family from filter to ensure we get correct one.

Signed-off-by: Serhey Popovych <serhe.popovych@...il.com>
---
 ip/ipaddress.c |   29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index ba60125..38d994e 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -1523,19 +1523,20 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 		if (fnmatch(filter.label, label, 0) != 0)
 			return 0;
 	}
-	if (filter.pfx.family) {
-		if (rta_tb[IFA_LOCAL]) {
-			inet_prefix dst = { .family = ifa->ifa_family };
-
-			memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
-			if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
-				return 0;
-		}
-	}
 
 	if (filter.family && filter.family != ifa->ifa_family)
 		return 0;
 
+	if (filter.pfx.family && rta_tb[IFA_LOCAL]) {
+		struct rtattr *rta = rta_tb[IFA_LOCAL];
+		inet_prefix dst, *f_pfx = &filter.pfx;
+
+		if (get_addr_rta(&dst, rta, f_pfx->family))
+			return 0;
+		if (inet_addr_match(&dst, f_pfx, f_pfx->bitlen))
+			return 0;
+	}
+
 	if (filter.flushb) {
 		struct nlmsghdr *fn;
 
@@ -1893,12 +1894,12 @@ static void ipaddr_filter(struct nlmsg_chain *linfo, struct nlmsg_chain *ainfo)
 					tb[IFA_LOCAL] = tb[IFA_ADDRESS];
 
 				if (filter.pfx.family && tb[IFA_LOCAL]) {
-					inet_prefix dst = {
-						.family = ifa->ifa_family
-					};
+					struct rtattr *rta = tb[IFA_LOCAL];
+					inet_prefix dst, *f_pfx = &filter.pfx;
 
-					memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
-					if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
+					if (get_addr_rta(&dst, rta, f_pfx->family))
+						continue;
+					if (inet_addr_match(&dst, f_pfx, f_pfx->bitlen))
 						continue;
 				}
 				if (filter.label) {
-- 
1.7.10.4