adding supprot for two new bpf's tcp sockopts: TCP_SAVE_SYN (set) and TCP_SAVED_SYN (get) this would allow for tcp-bpf program to build some logic based on fields from ingress syn packet (e.g. doing tcp's tos/tclass reflection (see sample prog)) and do it transparently from userspace program point of view
v2->v3: - make patch series public v1->v2: - adding proper SPDX license Nikita V. Shirokov (2): new options for bpf_(set|get)sockopt new sample bpf prog net/core/filter.c | 25 +++++++-- samples/bpf/Makefile | 1 + samples/bpf/tcp_tos_reflect_kern.c | 87 ++++++++++++++++++++++++++++++ 3 files changed, 109 insertions(+), 4 deletions(-) create mode 100644 samples/bpf/tcp_tos_reflect_kern.c -- 2.17.1
