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-rw-r--r--extensions/libxt_udp.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/extensions/libxt_udp.c b/extensions/libxt_udp.c
index d4930725..b9f39ee4 100644
--- a/extensions/libxt_udp.c
+++ b/extensions/libxt_udp.c
@@ -60,10 +60,10 @@ static void udp_parse(struct xt_option_call *cb)
}
}
-static char *
+static const char *
port_to_service(int port)
{
- struct servent *service;
+ const struct servent *service;
if ((service = getservbyport(htons(port), "udp")))
return service->s_name;
@@ -74,7 +74,7 @@ port_to_service(int port)
static void
print_port(uint16_t port, int numeric)
{
- char *service;
+ const char *service;
if (numeric || (service = port_to_service(port)) == NULL)
printf("%u", port);