polarssl: fix ALPN protocol negotiation

Correctly check for strncmp() return value (it returns 0 if the strings
match).

diff --git a/lib/vtls/polarssl.c b/lib/vtls/polarssl.c
index ca7e8077569b39928fd5c2b5af019f1f4028c4e2..5c7519735766a61bdcbbcb80f64eaa68a8e61880 100644 (file)
--- a/lib/vtls/polarssl.c
+++ b/lib/vtls/polarssl.c
@@ -468,11 +468,11 @@ polarssl_connect_step2(struct connectdata *conn,
     if(next_protocol != NULL) {
       infof(data, "ALPN, server accepted to use %s\n", next_protocol);
 
-      if(strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
+      if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
                   NGHTTP2_PROTO_VERSION_ID_LEN)) {
         conn->negnpn = NPN_HTTP2;
       }
-      else if(strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) {
+      else if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) {
         conn->negnpn = NPN_HTTP1_1;
       }
     }