1 files changed, 5 insertions, 1 deletions
diff --git a/Modules/getaddrinfo.c b/Modules/getaddrinfo.c
index 0b4620e..f1c28d7 100644
--- a/Modules/getaddrinfo.c
+++ b/Modules/getaddrinfo.c
@@ -342,7 +342,11 @@ getaddrinfo(const char*hostname, const char*servname,
                 pai->ai_socktype = SOCK_DGRAM;
                 pai->ai_protocol = IPPROTO_UDP;
             }
-            port = htons((u_short)atoi(servname));
+            long maybe_port = strtol(servname, NULL, 10);
+            if (maybe_port < 0 || maybe_port > 0xffff) {
+                ERR(EAI_SERVICE);
+            }
+            port = htons((u_short)maybe_port);
         } else {
             struct servent *sp;
             const char *proto;