Here is a list of all files with brief descriptions:

[detail level 12345]

▼ contrib
► cmake
git-version.py
parse-version.m4.py
► extract-crl
extractcrl.py
▼ dev-tools
gerrit-send-mail.py
▼ doc
► doxygen
doc_compression.h
doc_control_processor.h
doc_control_tls.h
doc_data_control.h
doc_data_crypto.h
doc_eventloop.h
doc_external_multiplexer.h
doc_fragmentation.h
doc_internal_multiplexer.h
doc_key_generation.h
doc_mainpage.h
doc_memory_management.h
doc_protocol_overview.h
doc_reliable.h
doc_tunnel_state.h
▼ include
openvpn-msg.h
openvpn-plugin.h
▼ sample
► sample-plugins
► client-connect
sample-client-connect.c
► defer
multi-auth.c
► keying-material-exporter-demo
http-client.py
http-server.py
keyingmaterialexporter.c
► log
log.c
log_v3.c
► simple
base64.c
simple.c
► sample-scripts
totpauth.py
▼ src
► compat
compat-basename.c
compat-daemon.c
compat-dirname.c
compat-gettimeofday.c
compat-strsep.c
compat.h
► openvpn
argv.c
argv.h
auth_token.c
auth_token.h
base64.c
base64.h
basic.h
buffer.c
buffer.h
circ_list.h
clinat.c
clinat.h
common.h
comp-lz4.c
comp-lz4.h
comp.c
comp.h
compstub.c
console.c
console.h
console_builtin.c
console_systemd.c
crypto.c
crypto.h
crypto_backend.h
crypto_epoch.c
crypto_epoch.h
crypto_mbedtls.c
crypto_mbedtls.h
crypto_openssl.c
crypto_openssl.h
cryptoapi.c
cryptoapi.h
dco.c
dco.h
dco_freebsd.c
dco_freebsd.h
dco_internal.h
dco_linux.c
dco_linux.h
dco_win.c
dco_win.h
dhcp.c
dhcp.h
dns.c
dns.h
env_set.c
env_set.h
errlevel.h
error.c
error.h
event.c
event.h
fdmisc.c
fdmisc.h
forward.c
forward.h
fragment.c
fragment.h
gremlin.c
gremlin.h
helper.c
helper.h
httpdigest.c
httpdigest.h
init.c
init.h
integer.h
interval.c
interval.h
list.c
list.h
lladdr.c
lladdr.h
lzo.c
lzo.h
manage.c
manage.h
mbedtls_compat.h
mbuf.c
mbuf.h
memdbg.h
misc.c
misc.h
mroute.c
mroute.h
mss.c
mss.h
mstats.c
mstats.h
mtcp.c
mtcp.h
mtu.c
mtu.h
mudp.c
mudp.h
multi.c
multi.h
multi_io.c
multi_io.h
networking.h
networking_freebsd.c
networking_iproute2.c
networking_iproute2.h
networking_sitnl.c
networking_sitnl.h
ntlm.c
ntlm.h
occ.c
occ.h
openssl_compat.h
openvpn.c
openvpn.h
options.c
options.h
options_util.c
options_util.h
otime.c
otime.h
ovpn_dco_freebsd.h
ovpn_dco_linux.h
ovpn_dco_win.h
packet_id.c
packet_id.h
perf.c
perf.h
ping.c
ping.h
pkcs11.c
pkcs11.h
pkcs11_backend.h
pkcs11_mbedtls.c
pkcs11_openssl.c
platform.c
platform.h
plugin.c
plugin.h
pool.c
pool.h
proto.c
proto.h
proxy.c
proxy.h
ps.c
ps.h
push.c
push.h
pushlist.h
reflect_filter.c
reflect_filter.h
reliable.c
reliable.h
ring_buffer.h
route.c
route.h
run_command.c
run_command.h
schedule.c
schedule.h
session_id.c
session_id.h
shaper.c
shaper.h
sig.c
sig.h
socket.c
socket.h
socks.c
socks.h
ssl.c
ssl.h
ssl_backend.h
ssl_common.h
ssl_mbedtls.c
ssl_mbedtls.h
ssl_ncp.c
ssl_ncp.h
ssl_openssl.c
ssl_openssl.h
ssl_pkt.c
ssl_pkt.h
ssl_util.c
ssl_util.h
ssl_verify.c
ssl_verify.h
ssl_verify_backend.h
ssl_verify_mbedtls.c
ssl_verify_mbedtls.h
ssl_verify_openssl.c
ssl_verify_openssl.h
status.c
status.h
syshead.h
tls_crypt.c
tls_crypt.h
tun.c
tun.h
tun_afunix.c
tun_afunix.h
vlan.c
vlan.h
wfp_block.c
wfp_block.h
win32-util.c
win32-util.h
win32.c
win32.h
xkey_common.h
xkey_helper.c
xkey_provider.c
► openvpnmsica
dllmain.c
msica_arg.c
msica_arg.h
msiex.c
msiex.h
openvpnmsica.c
openvpnmsica.h
► openvpnserv
common.c
interactive.c
service.c
service.h
validate.c
validate.h
► plugins
► auth-pam
auth-pam.c
pamdl.c
pamdl.h
utils.c
utils.h
► down-root
down-root.c
► tapctl
basic.h
error.c
error.h
main.c
tap.c
tap.h
▼ tests
► unit_tests
► example_test
test.c
test2.c
► openvpn
cert_data.h
mock_get_random.c
mock_management.c
mock_msg.c
mock_msg.h
mock_ssl_dependencies.c
mock_win32_execve.c
pkey_test_utils.c
test_argv.c
test_auth_token.c
test_buffer.c
test_common.h
test_crypto.c
test_cryptoapi.c
test_misc.c
test_ncp.c
test_networking.c
test_packet_id.c
test_pkcs11.c
test_pkt.c
test_provider.c
test_ssl.c
test_tls_crypt.c
test_user_pass.c
► plugins
► auth-pam
test_search_and_replace.c
ntlm_support.c
config.h
ltrc.inc