libxt_tcpmss: fix an inversion while parsing --mss

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

diff --git a/extensions/libxt_tcpmss.c b/extensions/libxt_tcpmss.c
index 43a4a0d8829e6e61a228cca58df136509a88eaf9..46529f9788d8b79731defedde6d4f23df9e3e195 100644 (file)
--- a/extensions/libxt_tcpmss.c
+++ b/extensions/libxt_tcpmss.c
@@ -26,7 +26,7 @@ parse_tcp_mssvalue(const char *mssvalue)
 {
        unsigned int mssvaluenum;
 
-       if (!xtables_strtoui(mssvalue, NULL, &mssvaluenum, 0, UINT16_MAX))
+       if (xtables_strtoui(mssvalue, NULL, &mssvaluenum, 0, UINT16_MAX))
                return mssvaluenum;
 
        xtables_error(PARAMETER_PROBLEM,