1.21.6

2025.11 F-Stack v1.21.6(LTS)

1. F-Stack lib:

• Support bind no port like linux's IP_BIND_ADDRESS_NO_PORT.
• Add inner IP and port-based flow steering capabilities for the IPIP protocol.(Authors: Zhiwen Wang @hirowang1, Huiqin Zhang).
• Modify usleep to rte_delay_us_sleep.
• Add viritio support for kni.
• Build netgraph and ipfw by default.
• Disable RSS if hardware does not support it. @Clcanny
• ff_traffic support rx_dropped and tx_dropped.
• Added the -Wextra compilation option and fixed compilation errors.
• Add ff_log mod, that encapsulates some interfaces of the rte_log module.
• set the IP-type flag for tx_csum_l4 offload. @zcjie1
• Add ff_stop_run to stop the poll loop. @renzibei
• Add some cleanup action, however, it is incomplete.
• Add the feature fo ff_rss_check table to improve the performance of ff_rss_check(). See https://github.com/F-Stack/f-stack/wiki/%E2%80%8B%E2%80%8BF%E2%80%90Stack-ff_rss_check()-Optimization-Introduction%E2%80%8B

1. FreeBSD

• Add the feature fo ff_rss_check table to improve the performance of ff_rss_check(). See https://github.com/F-Stack/f-stack/wiki/%E2%80%8B%E2%80%8BF%E2%80%90Stack-ff_rss_check()-Optimization-Introduction%E2%80%8B

1. ff toos

• ff_traffic support rx_dropped and tx_dropped.

1. DPDK

• Modify real_if_indextoname return value and type. @GiannisLi

1. APP

• Nginx: Adapt nginx-1.28.0 to f-stack. @jinliu777