BIO_lookup_ex: Always retry the lookup on failure with AI_NUMERICHOST set

[oweals/openssl.git] / crypto / bio / b_addr.c

diff --git a/crypto/bio/b_addr.c b/crypto/bio/b_addr.c
index f295b766fa7346d7ac4c11d4bb1485d9c36b80d4..10738daacb98b97498f86377e3f245cd288ca3dd 100644 (file)
--- a/crypto/bio/b_addr.c
+++ b/crypto/bio/b_addr.c
@@ -696,6 +696,7 @@ int BIO_lookup_ex(const char *host, const char *service, int lookup_type,
         /* Note that |res| SHOULD be a 'struct addrinfo **' thanks to
          * macro magic in bio_lcl.h
          */
+      retry:
         switch ((gai_ret = getaddrinfo(host, service, &hints, res))) {
 # ifdef EAI_SYSTEM
         case EAI_SYSTEM:
@@ -707,6 +708,13 @@ int BIO_lookup_ex(const char *host, const char *service, int lookup_type,
             ret = 1;             /* Success */
             break;
         default:
+# if defined(AI_ADDRCONFIG) && defined(AI_NUMERICHOST)
+            if (hints.ai_flags & AI_ADDRCONFIG) {
+                hints.ai_flags &= ~AI_ADDRCONFIG;
+                hints.ai_flags |= AI_NUMERICHOST;
+                goto retry;
+            }
+# endif
             BIOerr(BIO_F_BIO_LOOKUP_EX, ERR_R_SYS_LIB);
             ERR_add_error_data(1, gai_strerror(gai_ret));
             break;