From: Vincent Bernat <vincent@bernat.im> On Linux, setting the ToS will also set the priority and the range of accepted values is quite limited (masked by 0x1e). Therefore, 0xc0 is translated to a priority of 0, not something we want, overriding the "7" priority which was set previously explicitely. To avoid that, just move setting priority later in the code. --- sysdep/unix/io.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c index 8773f4c41e86..1c81acbf4518 100644 --- a/sysdep/unix/io.c +++ b/sysdep/unix/io.c @@ -1226,10 +1226,6 @@ sk_setup(sock *s) #endif } - if (s->priority >= 0) - if (sk_set_priority(s, s->priority) < 0) - return -1; - if (sk_is_ipv4(s)) { if (s->flags & SKF_LADDR_RX) @@ -1280,6 +1276,10 @@ sk_setup(sock *s) return -1; } + if (s->priority >= 0) + if (sk_set_priority(s, s->priority) < 0) + return -1; + return 0; } -- 2.15.1