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Date: Tue, 5 Jun 2018 16:51:27 -0700
From: Arthur Jones <>
Subject: [PATCH] inet_ntop: do not compress single zeros in IPv6

glibc does not compress a single :0: to ::, we're not
doing anything wrong, but this change will make us more
compatible w/ glibc and fix a downstream testing issue

I ran the "fix" through libc-test inet_pton.c on alpine
linux edge and it passed...

I'm not subscribed to the mailing list so please CC me...
 src/network/inet_ntop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/network/inet_ntop.c b/src/network/inet_ntop.c
index 14f9f4c4..4bfef2c5 100644
--- a/src/network/inet_ntop.c
+++ b/src/network/inet_ntop.c
@@ -36,7 +36,7 @@ const char *inet_ntop(int af, const void *restrict a0, char *restrict s, socklen
 			j = strspn(buf+i, ":0");
 			if (j>max) best=i, max=j;
-		if (max>2) {
+		if (max>3) {
 			buf[best] = buf[best+1] = ':';
 			memmove(buf+best+2, buf+best+max, i-best-max+1);
2.15.1 (Apple Git-101)

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