When a client connects, SYN would be sent to guest only once. If the guest is not connected or ready at that time, the connection will be reset in 10s. These patches introduce the SYN retry mechanism using the similar backoff timeout as linux kernel. Also update the data retransmission timeout using the backoff timeout. v8: - Remove the TCP_/tcp_ suffix from certain macro and struct member names - Add parameter struct ctx *c to tcp_timer_ctl() - Modify rto_max type from size_t to int - Clamp syn_retries and syn_linear_timeouts with MAX_SYNCNT(127) - Some other minor fixes related to wording and formatting v7: - Update read_file() and read_file_integer() - Rename tcp_syn_params_init() to tcp_get_rto_params() - Modify the implementation of the timeout assignment - Add a patch to clamp the retry timeout Yumei Huang (6): tcp: Rename "retrans" to "retries" util: Introduce read_file() and read_file_integer() function tcp: Add parameter struct ctx *c to tcp_timer_ctl() tcp: Resend SYN for inbound connections tcp: Update data retransmission timeout tcp: Clamp the retry timeout tcp.c | 107 +++++++++++++++++++++++++++++++++++++++-------------- tcp.h | 6 +++ tcp_conn.h | 13 ++++--- util.c | 86 ++++++++++++++++++++++++++++++++++++++++++ util.h | 2 + 5 files changed, 181 insertions(+), 33 deletions(-) -- 2.51.0