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Test DSACK behavior with non contiguous ranges. Without prior fix (tcp: fix tcp_ofo_queue() to avoid including too much DUP SACK range) this would fail with: tcp_dsack_mult.pkt:37: error handling packet: bad value outbound TCP option 5 script packet: 0.100682 . 1:1(0) ack 6001 <nop,nop,sack 1001:3001 7001:8001> actual packet: 0.100679 . 1:1(0) ack 6001 win 1097 <nop,nop,sack 1001:6001 7001:8001> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: xin.guo <guoxin0309@gmail.com> Link: https://patch.msgid.link/20250626123420.1933835-3-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>