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config.proto
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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 [default = ""];
/* Should 'src' path be prefixed with this envar? */
optional string prefix_src_env = 2 [default = ""];
/* If specified, contains buffer that will be written to the dst file */
optional bytes src_content = 3 [default = ""];
/* Mount point inside jail */
required string dst = 4 [default = ""];
/* Should 'dst' path be prefixed with this envar? */
optional string prefix_dst_env = 5 [default = ""];
/* 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 a 'mount --bind src dst' type of mount? */
optional bool is_bind = 8 [default = false];
/* Is it a R/W mount? */
optional bool rw = 9 [default = false];
/* Is it a 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];
/* Is it a nosuid mount */
optional bool nosuid = 13 [default = false];
/* Is it a nodev mount */
optional bool nodev = 14 [default = false];
/* Is it a noexec mount */
optional bool noexec = 15 [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];
/* Hostname inside jail */
optional string hostname = 4 [default = "NSJAIL"];
/* Initial current working directory for the binary */
optional string cwd = 5 [default = "/"];
/* Defines whether to use switch_root or pivot_root */
optional bool no_pivotroot = 6 [default = false];
/* TCP port to listen to. Valid with mode=LISTEN only */
optional uint32 port = 7 [default = 0];
/* Host to bind to for mode=LISTEN. Must be in IPv6 format */
optional string bindhost = 8 [default = "::"];
/* For mode=LISTEN, maximum number of connections across all IPs */
optional uint32 max_conns = 9 [default = 0];
/* For mode=LISTEN, maximum number of connections from a single IP */
optional uint32 max_conns_per_ip = 10 [default = 0];
/* Wall-time time limit for commands */
optional uint32 time_limit = 11 [default = 600];
/* Should nsjail go into background? */
optional bool daemon = 12 [default = false];
/* Maximum number of CPUs to use: 0 - no limit */
optional uint32 max_cpus = 13 [default = 0];
/* FD to log to. */
optional int32 log_fd = 14;
/* File to save logs to. */
optional string log_file = 15;
/* Minimum log level displayed.
See 'msg LogLevel' description for more */
optional LogLevel log_level = 16;
/* Should the current environment variables be kept
when executing the binary */
optional bool keep_env = 17 [default = false];
/* EnvVars to be set before executing binaries. If the envar doesn't contain '='
(e.g. just the 'DISPLAY' string), the current envar value will be used */
repeated string envar = 18;
/* Should capabilities be preserved or dropped */
optional bool keep_caps = 19 [default = false];
/* Which capabilities should be preserved if keep_caps == false.
Format: "CAP_SYS_PTRACE" */
repeated string cap = 20;
/* Should nsjail close FD=0,1,2 before executing the process */
optional bool silent = 21 [default = false];
/* Should the child process have control over terminal?
Can be useful to allow /bin/sh to provide
job control / signals. Dangerous, can be used to put
characters into the controlling terminal back */
optional bool skip_setsid = 22 [default = false];
/* Redirect sdterr of the process to /dev/null instead of the socket or original TTY */
optional bool stderr_to_null = 23 [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 = 24;
/* Setting it to true will allow to have set-uid binaries
inside the jail */
optional bool disable_no_new_privs = 25 [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 = 26 [default = 4096]; /* In MiB */
optional RLimit rlimit_as_type = 27 [default = VALUE];
optional uint64 rlimit_core = 28 [default = 0]; /* In MiB */
optional RLimit rlimit_core_type = 29 [default = VALUE];
optional uint64 rlimit_cpu = 30 [default = 600]; /* In seconds */
optional RLimit rlimit_cpu_type = 31 [default = VALUE];
optional uint64 rlimit_fsize = 32 [default = 1]; /* In MiB */
optional RLimit rlimit_fsize_type = 33 [default = VALUE];
optional uint64 rlimit_nofile = 34 [default = 32];
optional RLimit rlimit_nofile_type = 35 [default = VALUE];
/* RLIMIT_NPROC is system-wide - tricky to use; use the soft limit value by
* default here */
optional uint64 rlimit_nproc = 36 [default = 1024];
optional RLimit rlimit_nproc_type = 37 [default = SOFT];
/* In MiB, use the soft limit value by default */
optional uint64 rlimit_stack = 38 [default = 8];
optional RLimit rlimit_stack_type = 39 [default = SOFT];
/* In KB, use the soft limit value by default */
optional uint64 rlimit_memlock = 40 [default = 64];
optional RLimit rlimit_memlock_type = 41 [default = SOFT];
optional uint64 rlimit_rtprio = 42 [default = 0];
optional RLimit rlimit_rtprio_type = 43 [default = SOFT];
optional uint64 rlimit_msgqueue = 44 [default = 1024]; /* In bytes */
optional RLimit rlimit_msgqueue_type = 45 [default = SOFT];
/* Disable all rlimits, default to limits set by parent */
optional bool disable_rl = 46 [default = false];
/* See 'man personality' for more */
optional bool persona_addr_compat_layout = 47 [default = false];
optional bool persona_mmap_page_zero = 48 [default = false];
optional bool persona_read_implies_exec = 49 [default = false];
optional bool persona_addr_limit_3gb = 50 [default = false];
optional bool persona_addr_no_randomize = 51 [default = false];
/* Which name-spaces should be used? */
optional bool clone_newnet = 52 [default = true];
optional bool clone_newuser = 53 [default = true];
optional bool clone_newns = 54 [default = true];
optional bool clone_newpid = 55 [default = true];
optional bool clone_newipc = 56 [default = true];
optional bool clone_newuts = 57 [default = true];
/* Disable for kernel versions < 4.6 as it's not supported there */
optional bool clone_newcgroup = 58 [default = true];
/* Supported with kernel versions >= 5.3 */
optional bool clone_newtime = 59 [default = false];
/* Mappings for UIDs and GIDs. See the description for 'msg IdMap'
for more */
repeated IdMap uidmap = 60;
repeated IdMap gidmap = 61;
/* Should /proc be mounted (R/O)? This can also be added in the 'mount'
section below */
optional bool mount_proc = 62 [default = false];
/* Mount points inside the jail. See the description for 'msg MountPt'
for more */
repeated MountPt mount = 63;
/* If > 0, maximum cumulative size of RAM used inside any jail */
optional uint64 cgroup_mem_max = 67 [default = 0]; /* In bytes */
/* If > 0, maximum cumulative size of RAM + swap used inside any jail */
optional uint64 cgroup_mem_memsw_max = 91 [default = 0]; /* In bytes */
/* If >= 0, maximum cumulative size of swap used inside any jail */
optional int64 cgroup_mem_swap_max = 92 [default = -1]; /* In bytes */
/* Mount point for cgroups-memory in your system */
optional string cgroup_mem_mount = 68 [default = "/sys/fs/cgroup/memory"];
/* Writeable directory (for the nsjail user) under cgroup_mem_mount */
optional string cgroup_mem_parent = 69 [default = "NSJAIL"];
/* If > 0, maximum number of PIDs (threads/processes) inside jail */
optional uint64 cgroup_pids_max = 70 [default = 0];
/* Mount point for cgroups-pids in your system */
optional string cgroup_pids_mount = 71 [default = "/sys/fs/cgroup/pids"];
/* Writeable directory (for the nsjail user) under cgroup_pids_mount */
optional string cgroup_pids_parent = 72 [default = "NSJAIL"];
/* If > 0, Class identifier of network packets inside jail */
optional uint32 cgroup_net_cls_classid = 73 [default = 0];
/* Mount point for cgroups-net-cls in your system */
optional string cgroup_net_cls_mount = 74 [default = "/sys/fs/cgroup/net_cls"];
/* Writeable directory (for the nsjail user) under cgroup_net_mount */
optional string cgroup_net_cls_parent = 75 [default = "NSJAIL"];
/* If > 0, number of milliseconds of CPU time per second that jailed processes can use */
optional uint32 cgroup_cpu_ms_per_sec = 76 [default = 0];
/* Mount point for cgroups-cpu in your system */
optional string cgroup_cpu_mount = 77 [default = "/sys/fs/cgroup/cpu"];
/* Writeable directory (for the nsjail user) under cgroup_cpu_mount */
optional string cgroup_cpu_parent = 78 [default = "NSJAIL"];
/* Mount point for cgroup v2 in your system */
optional string cgroupv2_mount = 79 [default = "/sys/fs/cgroup"];
/* Use cgroup v2 */
optional bool use_cgroupv2 = 80 [default = false];
/* Should the 'lo' interface be brought up (active) inside this jail? */
optional bool iface_no_lo = 81 [default = false];
/* Put this interface inside the jail */
repeated string iface_own = 82;
/* Parameters for the cloned MACVLAN interface inside jail */
optional string macvlan_iface = 83; /* Interface to be cloned, eg 'eth0' */
optional string macvlan_vs_ip = 84 [default = "192.168.0.2"];
optional string macvlan_vs_nm = 85 [default = "255.255.255.0"];
optional string macvlan_vs_gw = 86 [default = "192.168.0.1"];
optional string macvlan_vs_ma = 87 [default = ""];
optional string macvlan_vs_mo = 88 [default = "private"];
/* Niceness level of the jailed process */
optional int32 nice_level = 89 [default = 19];
/* 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 = 90;
optional bool disable_tsc = 93 [default = false];
/* Set this to true to forward fatal signals to the child process instead
* of always using SIGKILL. */
optional bool forward_signals = 94 [default = false];
}