[src/trunk]: src/usr.sbin/rtadvd Fix some unaligned pointer issues.

[roy <roy%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/146b810d7f9a
branches:  trunk
changeset: 318382:146b810d7f9a
user:      roy <roy%NetBSD.org@localhost>
date:      Fri Apr 20 10:26:34 2018 +0000
description:
Fix some unaligned pointer issues.

diffstat:

 usr.sbin/rtadvd/rrenum.c |   9 ++++++---
 usr.sbin/rtadvd/rtadvd.c |  21 ++++++++++++---------
 2 files changed, 18 insertions(+), 12 deletions(-)

diffs (125 lines):

diff -r 9b93a479ffc9 -r 146b810d7f9a usr.sbin/rtadvd/rrenum.c
--- a/usr.sbin/rtadvd/rrenum.c  Fri Apr 20 09:56:22 2018 +0000
+++ b/usr.sbin/rtadvd/rrenum.c  Fri Apr 20 10:26:34 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rrenum.c,v 1.20 2017/11/06 15:15:04 christos Exp $     */
+/*     $NetBSD: rrenum.c,v 1.21 2018/04/20 10:26:34 roy Exp $  */
 /*     $KAME: rrenum.c,v 1.14 2004/06/14 05:36:00 itojun Exp $ */
 
 /*
@@ -147,6 +147,7 @@
        struct rr_pco_use *rpu, *rpulim;
        struct rainfo *rai;
        struct prefix *pp;
+       struct in6_addr rpm_prefix, rpu_prefix;
 
        rpu = (struct rr_pco_use *)(rpm + 1);
        rpulim = (struct rr_pco_use *)((char *)rpm + len);
@@ -201,8 +202,10 @@
                        logit(LOG_ERR, "<%s> ioctl: %m", __func__);
 
                /* very adhoc: should be rewritten */
+               memcpy(&rpm_prefix, &rpm->rpm_prefix, sizeof(rpm_prefix));
+               memcpy(&rpu_prefix, &rpu->rpu_prefix, sizeof(rpu_prefix));
                if (rpm->rpm_code == RPM_PCO_CHANGE &&
-                   IN6_ARE_ADDR_EQUAL(&rpm->rpm_prefix, &rpu->rpu_prefix) &&
+                   IN6_ARE_ADDR_EQUAL(&rpm_prefix, &rpu_prefix) &&
                    rpm->rpm_matchlen == rpu->rpu_uselen &&
                    rpu->rpu_uselen == rpu->rpu_keeplen) {
                        if ((rai = if_indextorainfo(ifindex)) == NULL)
@@ -212,7 +215,7 @@
                                struct timespec now;
 
                                if (prefix_match(&pp->prefix, pp->prefixlen,
-                                                &rpm->rpm_prefix,
+                                                &rpm_prefix,
                                                 rpm->rpm_matchlen)) {
                                        /* change parameters */
                                        pp->validlifetime = ntohl(rpu->rpu_vltime);
diff -r 9b93a479ffc9 -r 146b810d7f9a usr.sbin/rtadvd/rtadvd.c
--- a/usr.sbin/rtadvd/rtadvd.c  Fri Apr 20 09:56:22 2018 +0000
+++ b/usr.sbin/rtadvd/rtadvd.c  Fri Apr 20 10:26:34 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rtadvd.c,v 1.59 2017/11/25 02:37:04 kre Exp $  */
+/*     $NetBSD: rtadvd.c,v 1.60 2018/04/20 10:26:34 roy Exp $  */
 /*     $KAME: rtadvd.c,v 1.92 2005/10/17 14:40:02 suz Exp $    */
 
 /*
@@ -1213,21 +1213,24 @@
        int inconsistent = 0;
        char ntopbuf[INET6_ADDRSTRLEN], prefixbuf[INET6_ADDRSTRLEN];
        struct timespec now;
+       struct in6_addr prefix;
 
 #if 0                          /* impossible */
        if (pinfo->nd_opt_pi_type != ND_OPT_PREFIX_INFORMATION)
                return 0;
 #endif
 
+       memcpy(&prefix, &pinfo->nd_opt_pi_prefix, sizeof(prefix));
+
        /*
         * log if the adveritsed prefix has link-local scope(sanity check?)
         */
-       if (IN6_IS_ADDR_LINKLOCAL(&pinfo->nd_opt_pi_prefix)) {
+       if (IN6_IS_ADDR_LINKLOCAL(&prefix)) {
                logit(LOG_INFO,
                       "%s: link-local prefix %s/%d is advertised "
                       "from %s on %s",
                       __func__,
-                      inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
+                      inet_ntop(AF_INET6, &prefix,
                                 prefixbuf, INET6_ADDRSTRLEN),
                       pinfo->nd_opt_pi_prefix_len,
                       inet_ntop(AF_INET6, &from->sin6_addr,
@@ -1235,12 +1238,12 @@
                       rai->ifname);
        }
 
-       if ((pp = find_prefix(rai, &pinfo->nd_opt_pi_prefix,
+       if ((pp = find_prefix(rai, &prefix,
                              pinfo->nd_opt_pi_prefix_len)) == NULL) {
                logit(LOG_INFO,
                       "%s: prefix %s/%d from %s on %s is not in our list",
                       __func__,
-                      inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
+                      inet_ntop(AF_INET6, &prefix,
                                 prefixbuf, INET6_ADDRSTRLEN),
                       pinfo->nd_opt_pi_prefix_len,
                       inet_ntop(AF_INET6, &from->sin6_addr,
@@ -1268,7 +1271,7 @@
                               " (decr. in real time) inconsistent on %s:"
                               " %d from %s, %ld from us",
                               __func__,
-                              inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
+                              inet_ntop(AF_INET6, &prefix,
                                         prefixbuf, INET6_ADDRSTRLEN),
                               pinfo->nd_opt_pi_prefix_len,
                               rai->ifname, preferred_time,
@@ -1283,7 +1286,7 @@
                       " inconsistent on %s:"
                       " %d from %s, %d from us",
                       __func__,
-                      inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
+                      inet_ntop(AF_INET6, &prefix,
                                 prefixbuf, INET6_ADDRSTRLEN),
                       pinfo->nd_opt_pi_prefix_len,
                       rai->ifname, preferred_time,
@@ -1304,7 +1307,7 @@
                               " (decr. in real time) inconsistent on %s:"
                               " %d from %s, %ld from us",
                               __func__,
-                              inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
+                              inet_ntop(AF_INET6, &prefix,
                                         prefixbuf, INET6_ADDRSTRLEN),
                               pinfo->nd_opt_pi_prefix_len,
                               rai->ifname, preferred_time,
@@ -1319,7 +1322,7 @@
                       " inconsistent on %s:"
                       " %d from %s, %d from us",
                       __func__,
-                      inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
+                      inet_ntop(AF_INET6, &prefix,
                                 prefixbuf, INET6_ADDRSTRLEN),
                       pinfo->nd_opt_pi_prefix_len,
                       rai->ifname, valid_time,