path: root/src/network/inet_ntop.c
diff options
authorArthur Jones <>2018-06-05 16:51:27 -0700
committerRich Felker <>2018-06-26 16:47:31 -0400
commit5c8e69267b9ae919e55eee4b79580224111bc3ba (patch)
tree400887a1d8879984a86d3c1a13f44550dd42bf80 /src/network/inet_ntop.c
parentda5851e9f464f74533cc8270c932cf6466ff3256 (diff)
inet_ntop: do not compress single zeros in IPv6
maintainer's note: this change is for conformance with RFC 5952, 4.2.2, which explicitly forbids use of :: to shorten a single 16-bit 0 field when producing the canonical text representation for an IPv6 address. fixes a test failure reported by Philip Homburg, who also submitted a patch, but this fix is simpler and should produce smaller code.
Diffstat (limited to 'src/network/inet_ntop.c')
1 files changed, 1 insertions, 1 deletions
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);