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Fix clang 4.0.0 warnings about taking the address of a packed member of

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struct ip in ping(8):

sbin/ping/ping.c:1684:53: error: taking address of packed member
'ip_src' of class or structure 'ip' may result in an unaligned pointer
value [-Werror,-Waddress-of-packed-member]
        (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
                                                           ^~~~~~~~~~~~~~~~~
sbin/ping/ping.c:1685:53: error: taking address of packed member
'ip_dst' of class or structure 'ip' may result in an unaligned pointer
value [-Werror,-Waddress-of-packed-member]
        (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
                                                           ^~~~~~~~~~~~~~~~~

MFC after:	3 days
This commit is contained in:
Dimitry Andric 2017-01-06 18:41:28 +00:00
parent 172ae88fec
commit a94c074d6a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=311530
1 changed files with 5 additions and 2 deletions
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7
sbin/ping/ping.c
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@ -1666,6 +1666,7 @@ pr_icmph(struct icmp *icp)
static void
pr_iph(struct ip *ip)
{
struct in_addr ina;
u_char *cp;
int hlen;
@ -1681,8 +1682,10 @@ pr_iph(struct ip *ip)
(u_long) ntohl(ip->ip_off) & 0x1fff);
(void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p,
ntohs(ip->ip_sum));
(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
memcpy(&ina, &ip->ip_src.s_addr, sizeof ina);
(void)printf(" %s ", inet_ntoa(ina));
memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina);
(void)printf(" %s ", inet_ntoa(ina));
/* dump any option bytes */
while (hlen-- > 20) {
(void)printf("%02x", *cp++);