tcpsecrets

Linux kernel module to provide access to tcp cookie secrets via /proc/tcp_secrets

Tested kernels

• 4.2.0-35-generic #40~14.04.1-Ubuntu
• 4.4.0-34-generic #53~14.04.1-Ubuntu
• 4.6.0-0.bpo.1-amd64 #1 SMP Debian 4.6.4-1~bpo8+1
• 4.9.0-0.bpo.3-amd64 #1 SMP Debian 4.9.25-1~bpo8+1
• 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u3
• 4.9.255 (custom)
• 5.8.0-48-generic #54~20.04.1-Ubuntu SMP
• 5.10.24 (custom)

Untested kernels

• 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (builds, not tested)

Unsupported kernels

• 2.6.x

Custom kernels

These options are required for module to work:

CONFIG_LIVEPATCH=y
CONFIG_FTRACE=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_FTRACE_MCOUNT_RECORD=y

Building for 5.7+ requires kprobes support:

CONFIG_KPROBES=y

Install via DKMS

KERNEL_VERSION=$(uname -r) make -f Makefile.dkms