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Diffstat (limited to 'src/network/getservbyport_r.c')
-rw-r--r--src/network/getservbyport_r.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/network/getservbyport_r.c b/src/network/getservbyport_r.c
index 0ae0e415..b7f21c6b 100644
--- a/src/network/getservbyport_r.c
+++ b/src/network/getservbyport_r.c
@@ -5,6 +5,7 @@
 #include <inttypes.h>
 #include <errno.h>
 #include <string.h>
+#include <stdlib.h>
 
 int getservbyport_r(int port, const char *prots,
 	struct servent *se, char *buf, size_t buflen, struct servent **res)
@@ -51,6 +52,9 @@ int getservbyport_r(int port, const char *prots,
 		break;
 	}
 
+	/* A numeric port string is not a service record. */
+	if (strtol(buf, 0, 10)==ntohs(port)) return ENOENT;
+
 	*res = se;
 	return 0;
 }