syntax = "proto2";

package nsjail;

enum Mode {
    LISTEN = 0; /* Listening on a TCP port */
    ONCE = 1; /* Running the command once only */
    RERUN = 2; /* Re-executing the command (forever) */
    EXECVE = 3; /* Executing command w/o the supervisor */
}
/* Should be self explanatory */
enum LogLevel {
    DEBUG = 0; /* Equivalent to the '-v' cmd-line option */
    INFO = 1; /* Default level */
    WARNING = 2; /* Equivalent to the '-q' cmd-line option */
    ERROR = 3;
    FATAL = 4;
}
message IdMap
{
    /* Empty string means "current uid/gid" */
    optional string inside_id = 1 [ default = "" ];
    optional string outside_id = 2 [ default = "" ];
    /* See 'man user_namespaces' for the meaning of count */
    optional uint32 count = 3 [ default = 1 ];
    /* Does this map use /usr/bin/new[u|g]idmap binary? */
    optional bool use_newidmap = 4 [ default = false ];
}
message MountPt
{
    /* Can be skipped for filesystems like 'proc' */
    optional string src = 1;
    /* Should 'src' path be prefixed with this envvar? */
    optional string prefix_src_env = 2;
    /* If specified, contains buffer that will be written to the dst file */
    optional bytes src_content = 3;
    /* Mount point inside jail */
    required string dst = 4;
    /* Should 'dst' path be prefixed with this envvar? */
    optional string prefix_dst_env = 5;
    /* Can be empty for mount --bind mounts */
    optional string fstype = 6 [ default = "" ];
    /* E.g. size=5000000 for 'tmpfs' */
    optional string options = 7 [ default = "" ];
    /* Is it 'mount --bind src dst' type of mount */
    optional bool is_bind = 8 [ default = false ];
    /* It it R/W mount */
    optional bool rw = 9 [ default = false ];
    /* Is it directory? If not specified an internal
       heuristics will be used to determine that */
    optional bool is_dir = 10;
    /* Should the sandboxing fail if we cannot mount this resource? */
    optional bool mandatory = 11 [ default = true ];
    /* Is it a symlink (instead of real mount point)? */
    optional bool is_symlink = 12 [ default = false ];
}
enum RLimit {
    VALUE = 0; /* Use the provided value */
    SOFT = 1; /* Use the current soft rlimit */
    HARD = 2; /* Use the current hard rlimit */
    INF = 3; /* Use RLIM64_INFINITY */
}
message Exe
{
    /* Will be used both as execv's path and as argv[0] */
    required string path = 1;
    /* This will be argv[1] and so on.. */
    repeated string arg = 2;
    /* Override argv[0] */
    optional string arg0 = 3;
    /* Should execveat() be used to execute a file-descriptor instead? */
    optional bool exec_fd = 4 [ default = false ];
}
message NsJailConfig
{
    /* Optional name and description for this config */
    optional string name = 1 [ default = "" ];
    repeated string description = 2;

    /* Execution mode: see 'msg Mode' description for more */
    optional Mode mode = 3 [ default = ONCE ];
    /* Equivalent to a bind mount with dst='/' */
    optional string chroot_dir = 4;
    /* Applies both to the chroot_dir and to /proc mounts */
    optional bool is_root_rw = 5 [ default = false ];
    /* Hostname inside jail */
    optional string hostname = 8 [ default = "NSJAIL" ];
    /* Initial current working directory for the binary */
    optional string cwd = 9 [ default = "/" ];

    /* TCP port to listen to. Valid with mode=LISTEN only */
    optional uint32 port = 10 [ default = 0 ];
    /* Host to bind to for mode=LISTEN. Must be in IPv6 format */
    optional string bindhost = 11 [ default = "::" ];
    /* For mode=LISTEN, maximum number of connections from a single IP */
    optional uint32 max_conns_per_ip = 12 [ default = 0 ];

    /* Wall-time time limit for commands */
    optional uint32 time_limit = 13 [ default = 600 ];
    /* Should nsjail go into background? */
    optional bool daemon = 14 [ default = false ];
    /* Maximum number of CPUs to use: 0 - no limit */
    optional uint32 max_cpus = 15 [ default = 0 ];

    /* FD to log to. */
    optional int32 log_fd = 16;
    /* File to save lofs to */
    optional string log_file = 17;
    /* Minimum log level displayed.
       See 'msg LogLevel' description for more */
    optional LogLevel log_level = 18;

    /* Should the current environment variables be kept
       when executing the binary */
    optional bool keep_env = 19 [ default = false ];
    /* EnvVars to be set before executing binaries */
    repeated string envar = 20;

    /* Should capabilities be preserved or dropped */
    optional bool keep_caps = 21 [ default = false ];
    /* Which capabilities should be preserved if keep_caps == false.
       Format: "CAP_SYS_PTRACE" */
    repeated string cap = 22;
    /* Should nsjail close FD=0,1,2 before executing the process */
    optional bool silent = 23 [ default = false ];
    /* Should the child process have control over terminal?
       Can be useful to allow /bin/sh to provide
       job control / signals */
    optional bool skip_setsid = 24 [ default = false ];
    /* Which FDs should be passed to the newly executed process
       By default only FD=0,1,2 are passed */
    repeated int32 pass_fd = 25;
    /* Setting it to true will allow to have set-uid binaries
       inside the jail */
    optional bool disable_no_new_privs = 26 [ default = false ];

    /* Various rlimits, the rlimit_as/rlimit_core/... are used only if
       rlimit_as_type/rlimit_core_type/... are set to RLimit::VALUE */
    optional uint64 rlimit_as = 27 [ default = 512 ]; /* In MiB */
    optional RLimit rlimit_as_type = 28 [ default = VALUE ];
    optional uint64 rlimit_core = 29 [ default = 0 ]; /* In MiB */
    optional RLimit rlimit_core_type = 30 [ default = VALUE ];
    optional uint64 rlimit_cpu = 31 [ default = 600 ]; /* In seconds */
    optional RLimit rlimit_cpu_type = 32 [ default = VALUE ];
    optional uint64 rlimit_fsize = 33 [ default = 1 ]; /* In MiB */
    optional RLimit rlimit_fsize_type = 34 [ default = VALUE ];
    optional uint64 rlimit_nofile = 35 [ default = 32 ];
    optional RLimit rlimit_nofile_type = 36 [ default = VALUE ];
    /* RLIMIT_NPROC is system-wide - tricky to use; use the soft limit value by default here */
    optional uint64 rlimit_nproc = 37 [ default = 1024 ];
    optional RLimit rlimit_nproc_type = 38 [ default = SOFT ];
    /* In MiB, use the soft limit value by default */
    optional uint64 rlimit_stack = 39 [ default = 1048576 ];
    optional RLimit rlimit_stack_type = 40 [ default = SOFT ];

    /* See 'man personality' for more */
    optional bool persona_addr_compat_layout = 41 [ default = false ];
    optional bool persona_mmap_page_zero = 42 [ default = false ];
    optional bool persona_read_implies_exec = 43 [ default = false ];
    optional bool persona_addr_limit_3gb = 44 [ default = false ];
    optional bool persona_addr_no_randomize = 45 [ default = false ];

    /* Which name-spaces should be used? */
    optional bool clone_newnet = 46 [ default = true ];
    optional bool clone_newuser = 47 [ default = true ];
    optional bool clone_newns = 48 [ default = true ];
    optional bool clone_newpid = 49 [ default = true ];
    optional bool clone_newipc = 50 [ default = true ];
    optional bool clone_newuts = 51 [ default = true ];
    /* It's only supported in newer kernels, hence disabled by default */
    optional bool clone_newcgroup = 52 [ default = false ];

    /* Mappings for UIDs and GIDs. See the description for 'msg IdMap'
       for more */
    repeated IdMap uidmap = 53;
    repeated IdMap gidmap = 54;

    /* Should /proc be mounted (R/O)? This can also be added in the 'mount'
       section below */
    optional bool mount_proc = 55 [ default = false ];
    /* Mount points inside the jail. See the description for 'msg MountPt'
       for more */
    repeated MountPt mount = 56;

    /* Kafel seccomp-bpf policy file or a string:
       Homepage of the project: https://github.com/google/kafel */
    optional string seccomp_policy_file = 57;
    repeated string seccomp_string = 58;

    /* If > 0, maximum cumulative size of RAM used inside any jail */
    optional uint64 cgroup_mem_max = 59 [ default = 0 ]; /* In MiB */
    /* Mount point for cgroups-memory in your system */
    optional string cgroup_mem_mount = 60 [ default = "/sys/fs/cgroup/memory" ];
    /* Writeable directory (for the nsjail user) under cgroup_mem_mount */
    optional string cgroup_mem_parent = 61 [ default = "NSJAIL" ];

    /* If > 0, maximum number of PIDs (threads/processes) inside jail */
    optional uint64 cgroup_pids_max = 62 [ default = 0 ];
    /* Mount point for cgroups-pids in your system */
    optional string cgroup_pids_mount = 63 [ default = "/sys/fs/cgroup/pids" ];
    /* Writeable directory (for the nsjail user) under cgroup_pids_mount */
    optional string cgroup_pids_parent = 64 [ default = "NSJAIL" ];

    /* Should the 'lo' interface be brought up (active) inside this jail? */
    optional bool iface_no_lo = 65 [ default = false ];

    /* Parameters for the cloned MACVLAN interface inside jail */
    optional string macvlan_iface = 66; /* Interface to be cloned, eg 'eth0' */
    optional string macvlan_vs_ip = 67 [ default = "192.168.0.2" ];
    optional string macvlan_vs_nm = 68 [ default = "255.255.255.0" ];
    optional string macvlan_vs_gw = 69 [ default = "192.168.0.1" ];

    /* Binary path (with arguments) to be executed. If not specified here, it
       can be specified with cmd-line as "-- /path/to/command arg1 arg2" */
    optional Exe exec_bin = 70;

    /* If > 0, Class identifier of network packets inside jail */
    optional uint32 cgroup_net_cls_classid = 71 [ default = 0 ];
    /* Mount point for cgroups-net-cls in your system */
    optional string cgroup_net_cls_mount = 72 [ default = "/sys/fs/cgroup/net_cls" ];
    /* Writeable directory (for the nsjail user) under cgroup_net_mount */
    optional string cgroup_net_cls_parent = 73 [ default = "NSJAIL" ];
}