ping: Disable reverse DNS lookup for each reply

ping does reverse DNS lookup for each reply via getnameinfo() without
NI_NUMERICH flag for each ICMP ECHO REPLY (for both IPv4 and IPv6)
+ for each IPv6 Node Information Queries request.

This is unnecessary slowdown, which can cause ping to hang with random
DNS problems.

Fixes: iputils#414
Fixes: 3337034 ("Initial import of iputils")
Signed-off-by: Petr Vorel <pvorel@suse.cz>

ping/ping.c

@@ -1654,7 +1654,7 @@ int ping4_parse_reply(struct ping_rts *rts, struct socket_st *sock,
 			wrong_source = 1;
 		if (gather_statistics(rts, (uint8_t *)icp, sizeof(*icp), cc,
 				      ntohs(icp->un.echo.sequence),
-				      reply_ttl, 0, tv, pr_addr(rts, from, sizeof *from),
+				      reply_ttl, 0, tv, pr_raw_addr(rts, from, sizeof *from),
 				      pr_echo_reply, rts->multicast, wrong_source)) {
 			fflush(stdout);
 			return 0;

ping/ping6_common.c

@@ -866,7 +866,7 @@ int ping6_parse_reply(struct ping_rts *rts, socket_st *sock,
 
 		if (gather_statistics(rts, (uint8_t *)icmph, sizeof(*icmph), cc,
 				      ntohs(icmph->icmp6_seq),
-				      hops, 0, tv, pr_addr(rts, from, sizeof *from),
+				      hops, 0, tv, pr_raw_addr(rts, from, sizeof *from),
 				      pr_echo_reply,
 				      rts->multicast, wrong_source)) {
 			fflush(stdout);
@@ -879,7 +879,7 @@ int ping6_parse_reply(struct ping_rts *rts, socket_st *sock,
 			return 1;
 		if (gather_statistics(rts, (uint8_t *)icmph, sizeof(*icmph), cc,
 				      seq,
-				      hops, 0, tv, pr_addr(rts, from, sizeof *from),
+				      hops, 0, tv, pr_raw_addr(rts, from, sizeof *from),
 				      pr_niquery_reply,
 				      rts->multicast, 0))
 			return 0;