From 15729bef385211bc2a0497e2d53a45c45d677d2c Mon Sep 17 00:00:00 2001 From: Daiki Ueno Date: Thu, 8 Jul 2021 19:22:36 +0200 Subject: [PATCH] BIO_lookup_ex: use AI_ADDRCONFIG only if explicit host name is given The flag only affects which record types are queried via DNS (A or AAAA, or both). When node is NULL and AF_UNSPEC is used, it prevents getaddrinfo returning the right address associated with the loopback interface. Signed-off-by: Daiki Ueno Reviewed-by: Tomas Mraz Reviewed-by: Dmitry Belyavskiy (Merged from https://github.com/openssl/openssl/pull/16033) --- crypto/bio/bio_addr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/bio/bio_addr.c b/crypto/bio/bio_addr.c index 0efbc3cb44a..d18c849ade1 100644 --- a/crypto/bio/bio_addr.c +++ b/crypto/bio/bio_addr.c @@ -696,7 +696,7 @@ int BIO_lookup_ex(const char *host, const char *service, int lookup_type, hints.ai_protocol = protocol; # ifdef AI_ADDRCONFIG # ifdef AF_UNSPEC - if (family == AF_UNSPEC) + if (host != NULL && family == AF_UNSPEC) # endif hints.ai_flags |= AI_ADDRCONFIG; # endif -- 2.47.3