policy_module(server-custom, 1.0.2)

gen_require(`
    type ping_t, rsync_t, nginx_t, syncthing_t;
    type ssh_keygen_t, lvm_t, lvm_metadata_t;
    type portage_t, portage_ebuild_t;
    type sysadm_t, tmpfiles_t, syslogd_t, hugetlbfs_t;
    type kmod_t, tracefs_t, postgresql_t, postgresql_tmp_t;
    type named_t, dovecot_t, dovecot_auth_t, redis_t;
    type mail_spool_t, exim_t, dovecot_deliver_t, mailserver_delivery;
    type freshclam_t, phpfpm_t, kernel_t, iptables_t;
    role sysadm_r;
')

####### Policy

# Musl specific requirements for address resolve
corenet_udp_bind_generic_node(ping_t)
corenet_udp_bind_generic_node(portage_t)
corenet_udp_bind_generic_node(rsync_t)
corenet_udp_bind_generic_node(nginx_t)
corenet_udp_bind_generic_node(exim_t)
corenet_udp_bind_generic_node(freshclam_t)

# PHP ROUNDCUBE
corenet_tcp_connect_sieve_port(phpfpm_t)

# NGINX failed to start without additional permissions
allow nginx_t self:capability { dac_override dac_read_search };
allow nginx_t self:process getsched;

# Syncthing failed to start/stop without additional permissions
corecmd_exec_bin(syncthing_t)
# WARNING: Failed to lower process priority: set process group: permission denied
# WARNING: Failed to lower process priority: set niceness: permission denied
allow syncthing_t self:process { signal_perms setpgid setsched };
# Able to run "ip ropute show" to determinate gateway for NAT-PMP
# sysnet_domtrans_ifconfig(syncthing_t)
# Able to read network state (/proc/*/route) to determinate gateway for NAT-t And to check for cpu capabilities (/proc/cpuinfo).
kernel_read_network_state(syncthing_t)
files_search_mnt(syncthing_t)

# Unbound
allow named_t self:capability net_admin;

# PostgreSQL
allow postgresql_t hugetlbfs_t:file map;
allow postgresql_t postgresql_tmp_t:file map;

# Exim
#allow exim_t self:capability dac_read_search;
#allow exim_t self:process getsched;
allow dovecot_deliver_t exim_t:unix_stream_socket { read write };

# Redis
allow redis_t self:process getsched;
files_search_var_lib(redis_t)

# DOVECOT
# dovecot[28606]: Error: imap: Index (in-memory index): Lost log for seq=1 offset=0: Failed to map file seq=2 offset=40..18446744073709551615 (ret=0): Beginning of the log isn't available (initial_mapped=1, reason=in-memory index)
# dovecot[28606]: imap: Warning: fscking index file (in-memory index)
# dovecot[28606]: Error: imap: Failed to map transaction log /var/mail/xxx/Maildir/.Drafts/dovecot.index.log at sync_offset=40 after locking: Beginning of the log isn't available
# avc:  denied  { map } for  pid=28895 comm="imap" path="/var/spool/mail/xxx/Maildir/.Drafts/dovecot.index.cache" dev="dm-0" ino=187521031 scontext=system_u:system_r:dovecot_t:s0 tcontext=system_u:object_r:mail_spool_t:s0 tclass=file permissive=0
allow dovecot_t mail_spool_t:file map;
# Dovecot SMTP Submission
corenet_sendrecv_smtp_server_packets(dovecot_t)
corenet_tcp_bind_smtp_port(dovecot_t)
corenet_sendrecv_smtp_client_packets(dovecot_t)
corenet_tcp_connect_smtp_port(dovecot_t)
# Dovecot DB connect
corenet_tcp_connect_postgresql_port(dovecot_auth_t)

# NSD failed to work properly without additional permissions
#allow nsd_t self:capability { dac_read_search net_admin };
#allow nsd_t self:capability { dac_read_search net_admin };
#allow nsd_t nsd_zone_t:file { map };
#allow nsd_t nsd_db_t:file { map };

#allow lvm_t lvm_metadata_t:file map;

# comm="modprobe" name="events" dev="tracefs"
allow kmod_t tracefs_t:dir search;

# avc:  denied  { dac_read_search } for  pid=9036 comm="checkpath" capability=2
# avc:  denied  { dac_override } for  pid=9036 comm="checkpath" capability=1
allow tmpfiles_t self:capability { dac_read_search };

# avc:  denied  { sendto } for  pid=9036 comm="checkpath" path="/dev/log" 
logging_send_syslog_msg(tmpfiles_t)

# type=AVC msg=audit(1535383674.057:1263): avc:  denied  { write } for  pid=19064 comm="ebuild.sh" name="fd" dev="proc" ino=1054984 scontext=staff_u:sysadm_r:portage_t:s0 tcontext=staff_u:sysadm_r:portage_t:s0 tclass=dir permissive=0
allow portage_t self:dir write;
# type=AVC msg=audit(1536753503.662:7355): avc:  denied  { map } for  pid=19388 comm="eix-update" path="/var/lib/layman/musl/sys-apps/sandbox/sandbox-2.12.ebuild" dev="dm-0" ino=749977658 scontext=staff_u:sysadm_r:portage_t:s0 tcontext=system_u:object_r:portage_ebuild_t:s0 tclass=file permissive=0
allow portage_t portage_ebuild_t:file map;

#optional_policy(`
#        nsd_admin(sysadm_t, sysadm_r)
#')

# ssh_keygen_t failed to work with terminal
userdom_use_user_ptys(ssh_keygen_t)