fix getservby*() with null pointer for protocol argument

[musl] / src / network / getservbyport_r.c

diff --git a/src/network/getservbyport_r.c b/src/network/getservbyport_r.c
index f119abc..821afae 100644 (file)
--- a/src/network/getservbyport_r.c
+++ b/src/network/getservbyport_r.c
@@ -15,6 +15,10 @@ int getservbyport_r(int port, const char *prots,
                .sin_port = port,
        };
 
+       if (!prots) return -(
+               getservbyport_r(port, "tcp", se, buf, buflen, res)
+               && getservbyport_r(port, "udp", se, buf, buflen, res) );
+
        /* Align buffer */
        i = (uintptr_t)buf & sizeof(char *)-1;
        if (!i) i = sizeof(char *);