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|
/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2021 Cisco Systems, Inc.
*/
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <snort/snort.h>
static u8 *
format_snort_instance (u8 *s, va_list *args)
{
snort_instance_t *i = va_arg (*args, snort_instance_t *);
s = format (s, "%s [idx:%d sz:%d fd:%d]", i->name, i->index, i->shm_size,
i->shm_fd);
return s;
}
static clib_error_t *
snort_create_instance_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
clib_error_t *err = 0;
u8 *name = 0;
u32 queue_size = 1024;
u8 drop_on_diconnect = 1;
int rv = 0;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "queue-size %u", &queue_size))
;
else if (unformat (line_input, "on-disconnect drop"))
drop_on_diconnect = 1;
else if (unformat (line_input, "on-disconnect pass"))
drop_on_diconnect = 0;
else if (unformat (line_input, "name %s", &name))
;
else
{
err = clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
goto done;
}
}
if (!is_pow2 (queue_size))
{
err = clib_error_return (0, "Queue size must be a power of two");
goto done;
}
if (!name)
{
err = clib_error_return (0, "please specify instance name");
goto done;
}
rv = snort_instance_create (vm, (char *) name, min_log2 (queue_size),
drop_on_diconnect);
switch (rv)
{
case 0:
break;
case VNET_API_ERROR_ENTRY_ALREADY_EXISTS:
err = clib_error_return (0, "instance '%s' already exists", name);
break;
case VNET_API_ERROR_SYSCALL_ERROR_1:
err = clib_error_return (0, "memory fd failure: %U", format_clib_error,
clib_mem_get_last_error ());
break;
case VNET_API_ERROR_SYSCALL_ERROR_2:
err = clib_error_return (0, "ftruncate failure");
break;
case VNET_API_ERROR_SYSCALL_ERROR_3:
err = clib_error_return (0, "mmap failure");
break;
default:
err = clib_error_return (0, "snort_instance_create returned %d", rv);
break;
}
done:
vec_free (name);
unformat_free (line_input);
return err;
}
VLIB_CLI_COMMAND (snort_create_instance_command, static) = {
.path = "snort create-instance",
.short_help = "snort create-instaince name <name> [queue-size <size>] "
"[on-disconnect drop|pass]",
.function = snort_create_instance_command_fn,
};
static clib_error_t *
snort_disconnect_instance_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
clib_error_t *err = 0;
u8 *name = 0;
snort_instance_t *si;
int rv = 0;
if (!unformat_user (input, unformat_line_input, line_input))
return clib_error_return (0, "please specify instance name");
if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
unformat (line_input, "%s", &name);
if (!name)
{
err = clib_error_return (0, "please specify instance name");
goto done;
}
si = snort_get_instance_by_name ((char *) name);
if (!si)
rv = VNET_API_ERROR_NO_SUCH_ENTRY;
else
rv = snort_instance_disconnect (vm, si->index);
switch (rv)
{
case 0:
break;
case VNET_API_ERROR_NO_SUCH_ENTRY:
err = clib_error_return (0, "unknown instance '%s'", name);
break;
case VNET_API_ERROR_FEATURE_DISABLED:
err = clib_error_return (0, "instance '%s' is not connected", name);
break;
case VNET_API_ERROR_INVALID_VALUE:
err = clib_error_return (0, "failed to disconnect a broken client");
break;
default:
err = clib_error_return (0, "snort_instance_disconnect returned %d", rv);
break;
}
done:
vec_free (name);
unformat_free (line_input);
return err;
}
VLIB_CLI_COMMAND (snort_disconnect_instance_command, static) = {
.path = "snort disconnect instance",
.short_help = "snort disconnect instance <name>",
.function = snort_disconnect_instance_command_fn,
};
static clib_error_t *
snort_delete_instance_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
clib_error_t *err = 0;
u8 *name = 0;
int rv = 0;
if (!unformat_user (input, unformat_line_input, line_input))
return clib_error_return (0, "please specify instance name");
if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
unformat (line_input, "%s", &name);
if (!name)
{
err = clib_error_return (0, "please specify instance name");
goto done;
}
snort_instance_t *si = snort_get_instance_by_name ((char *) name);
if (!si)
err = clib_error_return (0, "unknown instance '%s' requested", name);
else
rv = snort_instance_delete (vm, si->index);
switch (rv)
{
case 0:
break;
case VNET_API_ERROR_NO_SUCH_ENTRY:
err = clib_error_return (0, "instance '%s' deletion failure", name);
break;
case VNET_API_ERROR_INSTANCE_IN_USE:
err = clib_error_return (0, "instance '%s' has connected client", name);
break;
default:
err = clib_error_return (0, "snort_instance_delete returned %d", rv);
break;
}
done:
vec_free (name);
unformat_free (line_input);
return err;
}
VLIB_CLI_COMMAND (snort_delete_instance_command, static) = {
.path = "snort delete instance",
.short_help = "snort delete instance <name>",
.function = snort_delete_instance_command_fn,
};
static clib_error_t *
snort_attach_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
vnet_main_t *vnm = vnet_get_main ();
clib_error_t *err = 0;
u8 *name = 0;
u32 sw_if_index = ~0;
snort_attach_dir_t dir = SNORT_INOUT;
int rv = 0;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "interface %U", unformat_vnet_sw_interface,
vnm, &sw_if_index))
;
else if (unformat (line_input, "instance %s", &name))
;
else if (unformat (line_input, "input"))
dir = SNORT_INPUT;
else if (unformat (line_input, "output"))
dir = SNORT_OUTPUT;
else if (unformat (line_input, "inout"))
dir = SNORT_INOUT;
else
{
err = clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
goto done;
}
}
if (sw_if_index == ~0)
{
err = clib_error_return (0, "please specify interface");
goto done;
}
if (!name)
{
err = clib_error_return (0, "please specify instance name");
goto done;
}
rv = snort_interface_enable_disable (vm, (char *) name, sw_if_index, 1, dir);
switch (rv)
{
case 0:
break;
case VNET_API_ERROR_FEATURE_ALREADY_ENABLED:
/* already attached to same instance */
break;
case VNET_API_ERROR_INSTANCE_IN_USE:
err = clib_error_return (0,
"interface %U already assigned to "
"an instance",
format_vnet_sw_if_index_name, vnm, sw_if_index);
break;
case VNET_API_ERROR_NO_SUCH_ENTRY:
err = clib_error_return (0, "unknown instance '%s'", name);
break;
default:
err = clib_error_return (0, "snort_interface_enable_disable returned %d",
rv);
break;
}
done:
vec_free (name);
unformat_free (line_input);
return err;
}
VLIB_CLI_COMMAND (snort_attach_command, static) = {
.path = "snort attach",
.short_help = "snort attach instance <name> interface <if-name> "
"[input|ouput|inout]",
.function = snort_attach_command_fn,
};
static clib_error_t *
snort_detach_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
unformat_input_t _line_input, *line_input = &_line_input;
vnet_main_t *vnm = vnet_get_main ();
clib_error_t *err = 0;
u32 sw_if_index = ~0;
int rv = 0;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "interface %U", unformat_vnet_sw_interface,
vnm, &sw_if_index))
;
else
{
err = clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
goto done;
}
}
if (sw_if_index == ~0)
{
err = clib_error_return (0, "please specify interface");
goto done;
}
rv = snort_interface_enable_disable (vm, 0, sw_if_index, 0, SNORT_INOUT);
switch (rv)
{
case 0:
break;
case VNET_API_ERROR_INVALID_INTERFACE:
err = clib_error_return (0,
"interface %U is not assigned to snort "
"instance!",
format_vnet_sw_if_index_name, vnm, sw_if_index);
break;
default:
err = clib_error_return (0, "snort_interface_enable_disable returned %d",
rv);
break;
}
done:
unformat_free (line_input);
return err;
}
VLIB_CLI_COMMAND (snort_detach_command, static) = {
.path = "snort detach",
.short_help = "snort detach interface <if-name>",
.function = snort_detach_command_fn,
};
static clib_error_t *
snort_show_instances_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
snort_main_t *sm = &snort_main;
snort_instance_t *si;
pool_foreach (si, sm->instances)
vlib_cli_output (vm, "%U", format_snort_instance, si);
return 0;
}
VLIB_CLI_COMMAND (snort_show_instances_command, static) = {
.path = "show snort instances",
.short_help = "show snort instances",
.function = snort_show_instances_command_fn,
};
static clib_error_t *
snort_show_interfaces_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
snort_main_t *sm = &snort_main;
vnet_main_t *vnm = vnet_get_main ();
snort_instance_t *si;
u32 *index;
vlib_cli_output (vm, "interface\t\tsnort instance");
vec_foreach (index, sm->instance_by_sw_if_index)
{
if (index[0] != ~0)
{
si = vec_elt_at_index (sm->instances, index[0]);
vlib_cli_output (vm, "%U:\t%s", format_vnet_sw_if_index_name, vnm,
index - sm->instance_by_sw_if_index, si->name);
}
}
return 0;
}
VLIB_CLI_COMMAND (snort_show_interfaces_command, static) = {
.path = "show snort interfaces",
.short_help = "show snort interfaces",
.function = snort_show_interfaces_command_fn,
};
static clib_error_t *
snort_show_clients_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
snort_main_t *sm = &snort_main;
u32 n_clients = pool_elts (sm->clients);
snort_client_t *c;
snort_instance_t *si;
vlib_cli_output (vm, "number of clients: %d", n_clients);
if (n_clients)
vlib_cli_output (vm, "client snort instance");
pool_foreach (c, sm->clients)
{
si = vec_elt_at_index (sm->instances, c->instance_index);
vlib_cli_output (vm, "%6d %s", c - sm->clients, si->name);
}
return 0;
}
VLIB_CLI_COMMAND (snort_show_clients_command, static) = {
.path = "show snort clients",
.short_help = "show snort clients",
.function = snort_show_clients_command_fn,
};
static clib_error_t *
snort_mode_polling_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
snort_set_node_mode (vm, VLIB_NODE_STATE_POLLING);
return 0;
}
static clib_error_t *
snort_mode_interrupt_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
snort_set_node_mode (vm, VLIB_NODE_STATE_INTERRUPT);
return 0;
}
VLIB_CLI_COMMAND (snort_mode_polling_command, static) = {
.path = "snort mode polling",
.short_help = "snort mode polling|interrupt",
.function = snort_mode_polling_command_fn,
};
VLIB_CLI_COMMAND (snort_mode_interrupt_command, static) = {
.path = "snort mode interrupt",
.short_help = "snort mode polling|interrupt",
.function = snort_mode_interrupt_command_fn,
};
static clib_error_t *
snort_show_mode_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
snort_main_t *sm = &snort_main;
char *mode =
sm->input_mode == VLIB_NODE_STATE_POLLING ? "polling" : "interrupt";
vlib_cli_output (vm, "input mode: %s", mode);
return 0;
}
VLIB_CLI_COMMAND (snort_show_mode_command, static) = {
.path = "show snort mode",
.short_help = "show snort mode",
.function = snort_show_mode_command_fn,
};
|
