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Restricted read-only CLI.

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Also adds support for executing commands using birdc <cmd>.
This commit is contained in:
Ondrej Zajicek 2010-02-21 09:57:26 +01:00
parent e304fd4bcf
commit e0a45fb421
8 changed files with 91 additions and 17 deletions
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47
client/client.c
View File

@ -25,8 +25,10 @@
#include "client/client.h"
#include "sysdep/unix/unix.h"
static char *opt_list = "s:v";
static char *opt_list = "s:vr";
static int verbose;
static char *init_cmd;
static int once;
static char *server_path = PATH_CONTROL_SOCKET;
static int server_fd;
@ -49,7 +51,7 @@ static int num_lines, skip_input, interactive;
static void
usage(void)
{
fprintf(stderr, "Usage: birdc [-s <control-socket>] [-v]\n");
fprintf(stderr, "Usage: birdc [-s <control-socket>] [-v] [-r]\n");
exit(1);
}
@ -67,11 +69,36 @@ parse_args(int argc, char **argv)
case 'v':
verbose++;
break;
case 'r':
init_cmd = "restrict";
break;
default:
usage();
}
/* If some arguments are not options, we take it as commands */
if (optind < argc)
{
char *tmp;
int i;
int len = 0;
if (init_cmd)
usage();
for (i = optind; i < argc; i++)
len += strlen(argv[i]) + 1;
tmp = init_cmd = malloc(len);
for (i = optind; i < argc; i++)
{
strcpy(tmp, argv[i]);
tmp += strlen(tmp);
*tmp++ = ' ';
}
once = 1;
}
}
/*** Input ***/
@ -267,6 +294,22 @@ update_state(void)
if (nstate == cstate)
return;
if (init_cmd)
{
/* First transition - client received hello from BIRD
and there is waiting initial command */
submit_server_command(init_cmd);
init_cmd = NULL;
return;
}
if (!init_cmd && once)
{
/* Initial command is finished and we want to exit */
cleanup();
exit(0);
}
if (nstate == STATE_PROMPT)
if (input_initialized)
input_reveal();

2
doc/reply_codes
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@ -24,6 +24,7 @@ Reply codes of BIRD command-line interface
0013 Status report
0014 Route count
0015 Reloading
0016 Access restricted
1000 BIRD version
1001 Interface list
@ -51,6 +52,7 @@ Reply codes of BIRD command-line interface
8004 Stopped due to reconfiguration
8005 Protocol is down => cannot dump
8006 Reload failed
8007 Access denied
9000 Command too long
9001 Parse error

9
nest/cli.h
View File

@ -33,6 +33,7 @@ typedef struct cli {
void (*cleanup)(struct cli *c);
void *rover; /* Private to continuation routine */
int last_reply;
int restricted; /* CLI is restricted to read-only commands */
struct linpool *parser_pool; /* Pool used during parsing */
byte *ring_buf; /* Ring buffer for asynchronous messages */
byte *ring_end, *ring_read, *ring_write; /* Pointers to the ring buffer */
@ -60,6 +61,14 @@ void cli_kick(cli *);
void cli_written(cli *);
void cli_echo(unsigned int class, byte *msg);
static inline int cli_access_restricted(void)
{
if (this_cli && this_cli->restricted)
return (cli_printf(this_cli, 8007, "Access denied"), 1);
else
return 0;
}
/* Functions provided by sysdep layer */
void cli_write_trigger(cli *);

25
nest/config.Y
View File

@ -45,7 +45,7 @@ CF_KEYWORDS(INTERFACE, IMPORT, EXPORT, FILTER, NONE, TABLE, STATES, ROUTES, FILT
CF_KEYWORDS(PASSWORD, FROM, PASSIVE, TO, ID, EVENTS, PACKETS, PROTOCOLS, INTERFACES)
CF_KEYWORDS(PRIMARY, STATS, COUNT, FOR, COMMANDS, PREEXPORT, GENERATE)
CF_KEYWORDS(LISTEN, BGP, V6ONLY, ADDRESS, PORT, PASSWORDS, DESCRIPTION)
CF_KEYWORDS(RELOAD, IN, OUT, MRTDUMP, MESSAGES)
CF_KEYWORDS(RELOAD, IN, OUT, MRTDUMP, MESSAGES, RESTRICT)
CF_ENUM(T_ENUM_RTS, RTS_, DUMMY, STATIC, INHERIT, DEVICE, STATIC_DEVICE, REDIRECT,
RIP, OSPF, OSPF_IA, OSPF_EXT1, OSPF_EXT2, BGP, PIPE)
@ -325,10 +325,10 @@ CF_CLI(SHOW STATUS,,, [[Show router status]])
{ cmd_show_status(); } ;
CF_CLI(SHOW PROTOCOLS, proto_patt2, [<protocol> | \"<pattern>\"], [[Show routing protocols]])
{ proto_apply_cmd($3, proto_cmd_show, 0); } ;
{ proto_apply_cmd($3, proto_cmd_show, 0, 0); } ;
CF_CLI(SHOW PROTOCOLS ALL, proto_patt2, [<protocol> | \"<pattern>\"], [[Show routing protocol details]])
{ proto_apply_cmd($4, proto_cmd_show, 1); } ;
{ proto_apply_cmd($4, proto_cmd_show, 0, 1); } ;
optsym:
SYM
@ -459,25 +459,28 @@ echo_size:
;
CF_CLI(DISABLE, proto_patt, <protocol> | \"<pattern>\" | all, [[Disable protocol]])
{ proto_apply_cmd($2, proto_cmd_disable, 0); } ;
{ proto_apply_cmd($2, proto_cmd_disable, 1, 0); } ;
CF_CLI(ENABLE, proto_patt, <protocol> | \"<pattern>\" | all, [[Enable protocol]])
{ proto_apply_cmd($2, proto_cmd_enable, 0); } ;
{ proto_apply_cmd($2, proto_cmd_enable, 1, 0); } ;
CF_CLI(RESTART, proto_patt, <protocol> | \"<pattern>\" | all, [[Restart protocol]])
{ proto_apply_cmd($2, proto_cmd_restart, 0); } ;
{ proto_apply_cmd($2, proto_cmd_restart, 1, 0); } ;
CF_CLI(RELOAD, proto_patt, <protocol> | \"<pattern>\" | all, [[Reload protocol]])
{ proto_apply_cmd($2, proto_cmd_reload, CMD_RELOAD); } ;
{ proto_apply_cmd($2, proto_cmd_reload, 1, CMD_RELOAD); } ;
CF_CLI(RELOAD IN, proto_patt, <protocol> | \"<pattern>\" | all, [[Reload protocol (just imported routes)]])
{ proto_apply_cmd($3, proto_cmd_reload, CMD_RELOAD_IN); } ;
{ proto_apply_cmd($3, proto_cmd_reload, 1, CMD_RELOAD_IN); } ;
CF_CLI(RELOAD OUT, proto_patt, <protocol> | \"<pattern>\" | all, [[Reload protocol (just exported routes)]])
{ proto_apply_cmd($3, proto_cmd_reload, CMD_RELOAD_OUT); } ;
{ proto_apply_cmd($3, proto_cmd_reload, 1, CMD_RELOAD_OUT); } ;
CF_CLI_HELP(DEBUG, ..., [[Control protocol debugging via BIRD logs]])
CF_CLI(DEBUG, proto_patt debug_mask, (<protocol> | <pattern> | all) (all | off | { states | routes | filters | events | packets }), [[Control protocol debugging via BIRD logs]])
{ proto_apply_cmd($2, proto_cmd_debug, $3); } ;
{ proto_apply_cmd($2, proto_cmd_debug, 1, $3); } ;
CF_CLI_HELP(MRTDUMP, ..., [[Control protocol debugging via MRTdump files]])
CF_CLI(MRTDUMP, proto_patt mrtdump_mask, (<protocol> | <pattern> | all) (all | off | { states | messages }), [[Control protocol debugging via MRTdump format]])
{ proto_apply_cmd($2, proto_cmd_mrtdump, $3); } ;
{ proto_apply_cmd($2, proto_cmd_mrtdump, 1, $3); } ;
CF_CLI(RESTRICT,,,[[Restrict current CLI session to safe commands]])
{ this_cli->restricted = 1; cli_msg(16, "Access restricted"); } ;
proto_patt:
SYM { $$.ptr = $1; $$.patt = 0; }

6
nest/proto.c
View File

@ -1006,8 +1006,12 @@ proto_apply_cmd_patt(char *patt, void (* cmd)(struct proto *, unsigned int, int)
}
void
proto_apply_cmd(struct proto_spec ps, void (* cmd)(struct proto *, unsigned int, int), unsigned int arg)
proto_apply_cmd(struct proto_spec ps, void (* cmd)(struct proto *, unsigned int, int),
int restricted, unsigned int arg)
{
if (restricted && cli_access_restricted())
return;
if (ps.patt)
proto_apply_cmd_patt(ps.ptr, cmd, arg);
else

2
nest/protocol.h
View File

@ -213,7 +213,7 @@ void proto_cmd_reload(struct proto *, unsigned int, int);
void proto_cmd_debug(struct proto *, unsigned int, int);
void proto_cmd_mrtdump(struct proto *, unsigned int, int);
void proto_apply_cmd(struct proto_spec ps, void (* cmd)(struct proto *, unsigned int, int), unsigned int arg);
void proto_apply_cmd(struct proto_spec ps, void (* cmd)(struct proto *, unsigned int, int), int restricted, unsigned int arg);
struct proto *proto_get_named(struct symbol *, struct protocol *);
#define CMD_RELOAD 0

2
sysdep/unix/config.Y
View File

@ -107,7 +107,7 @@ CF_CLI(CONFIGURE SOFT, cfg_name, [\"<file>\"], [[Reload configuration and ignore
{ cmd_reconfig($3, RECONFIG_SOFT); } ;
CF_CLI(DOWN,,, [[Shut the daemon down]])
{ cli_msg(7, "Shutdown requested"); order_shutdown(); } ;
{ cmd_shutdown(); } ;
cfg_name:
/* empty */ { $$ = NULL; }

13
sysdep/unix/main.c
View File

@ -141,6 +141,9 @@ cmd_reconfig(char *name, int type)
{
struct config *conf;
if (cli_access_restricted())
return;
if (!name)
name = config_name;
cli_msg(-2, "Reading configuration from %s", name);
@ -303,6 +306,16 @@ cli_init_unix(void)
* Shutdown
*/
void
cmd_shutdown(void)
{
if (cli_access_restricted())
return;
cli_msg(7, "Shutdown requested");
order_shutdown();
}
void
async_shutdown(void)
{