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# SPDX-License-Identifier: GPL-2.0-only menu "DCCP CCIDs Configuration" config IP_DCCP_CCID2_DEBUG bool "CCID-2 debugging messages" help Enable CCID-2 specific debugging messages. The debugging output can additionally be toggled by setting the ccid2_debug parameter to 0 or 1. If in doubt, say N. config IP_DCCP_CCID3 bool "CCID-3 (TCP-Friendly)" def_bool y if (IP_DCCP = y || IP_DCCP = m) help CCID-3 denotes TCP-Friendly Rate Control (TFRC), an equation-based rate-controlled congestion control mechanism. TFRC is designed to be reasonably fair when competing for bandwidth with TCP-like flows, where a flow is "reasonably fair" if its sending rate is generally within a factor of two of the sending rate of a TCP flow under the same conditions. However, TFRC has a much lower variation of throughput over time compared with TCP, which makes CCID-3 more suitable than CCID-2 for applications such streaming media where a relatively smooth sending rate is of importance. CCID-3 is further described in RFC 4342, https://www.ietf.org/rfc/rfc4342.txt The TFRC congestion control algorithms were initially described in RFC 5348. This text was extracted from RFC 4340 (sec. 10.2), https://www.ietf.org/rfc/rfc4340.txt If in doubt, say N. config IP_DCCP_CCID3_DEBUG bool "CCID-3 debugging messages" depends on IP_DCCP_CCID3 help Enable CCID-3 specific debugging messages. The debugging output can additionally be toggled by setting the ccid3_debug parameter to 0 or 1. If in doubt, say N. config IP_DCCP_TFRC_LIB def_bool y if IP_DCCP_CCID3 config IP_DCCP_TFRC_DEBUG def_bool y if IP_DCCP_CCID3_DEBUG endmenu