getaddrinfo: add EAI_NODATA error code to distinguish NODATA vs NxDomain

[musl] / src / network / getaddrinfo.c

diff --git a/src/network/getaddrinfo.c b/src/network/getaddrinfo.c
index 9df045f..64ad259 100644 (file)
--- a/src/network/getaddrinfo.c
+++ b/src/network/getaddrinfo.c
@@ -16,6 +16,7 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
        char canon[256], *outcanon;
        int nservs, naddrs, nais, canon_len, i, j, k;
        int family = AF_UNSPEC, flags = 0, proto = 0, socktype = 0;
+       int no_family = 0;
        struct aibuf *out;
 
        if (!host && !serv) return EAI_NONAME;
@@ -82,7 +83,7 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
                        default:
                                return EAI_SYSTEM;
                        }
-                       if (family == tf[i]) return EAI_NONAME;
+                       if (family == tf[i]) no_family = 1;
                        family = tf[1-i];
                }
        }
@@ -93,6 +94,8 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
        naddrs = __lookup_name(addrs, canon, host, family, flags);
        if (naddrs < 0) return naddrs;
 
+       if (no_family) return EAI_NODATA;
+
        nais = nservs * naddrs;
        canon_len = strlen(canon);
        out = calloc(1, nais * sizeof(*out) + canon_len + 1);