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diff --git a/src/inet.c b/src/inet.c
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index aa94975..1e9b959 100644
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--- a/src/inet.c
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+++ b/src/inet.c
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@@ -2,7 +2,7 @@
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* ProFTPD - FTP server daemon
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* Copyright (c) 1997, 1998 Public Flood Software
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* Copyright (c) 1999, 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net>
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- * Copyright (c) 2001-2013 The ProFTPD Project team
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+ * Copyright (c) 2001-2014 The ProFTPD Project team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@@ -771,8 +771,15 @@ int pr_inet_set_proto_opts(pool *p, conn_t *c, int mss, int nodelay,
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/* Only set TCLASS flags on IPv6 sockets; IPv4 sockets use TOS. */
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if (pr_netaddr_get_family(c->local_addr) == AF_INET6) {
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if (c->listen_fd != -1) {
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- if (setsockopt(c->listen_fd, ip_level, IPV6_TCLASS, (void *) &tos,
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- sizeof(tos)) < 0) {
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+ int res;
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+
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+ res = setsockopt(c->listen_fd, ip_level, IPV6_TCLASS, (void *) &tos,
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+ sizeof(tos));
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+ if (res < 0
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+#ifdef ENOPROTOOPT
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+ && errno != ENOPROTOOPT
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+#endif /* !ENOPROTOOPT */
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+ ) {
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pr_log_pri(PR_LOG_NOTICE, "error setting listen fd IPV6_TCLASS: %s",
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strerror(errno));
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}
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