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osmo-bsc
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nat: Add config option to filter/handle certain imsi'es.

This commit is contained in:
Holger Hans Peter Freyther 2010-04-13 09:24:37 +02:00
parent a4ed81c8d9
commit c16cf27bd5
2 changed files with 89 additions and 0 deletions
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15
openbsc/include/openbsc/bsc_nat.h
View File

@ -33,6 +33,8 @@
#include <osmocore/write_queue.h>
#include <osmocore/statistics.h>
#include <regex.h>
#define DIR_BSC 1
#define DIR_MSC 2
@ -138,6 +140,13 @@ struct bsc_config {
unsigned int lac;
int nr;
/* imsi white and blacklist */
char *imsi_allow;
regex_t imsi_allow_re;
char *imsi_deny;
regex_t imsi_deny_re;
/* backpointer */
struct bsc_nat *nat;
struct bsc_config_stats stats;
@ -199,6 +208,12 @@ struct bsc_nat {
struct bsc_endpoint *bsc_endpoints;
/* filter */
char *imsi_allow;
regex_t imsi_allow_re;
char *imsi_deny;
regex_t imsi_deny_re;
/* statistics */
struct bsc_nat_statistics stats;
};

74
openbsc/src/nat/bsc_nat_vty.c
View File

@ -51,6 +51,10 @@ static struct cmd_node bsc_node = {
static int config_write_nat(struct vty *vty)
{
vty_out(vty, "nat%s", VTY_NEWLINE);
if (_nat->imsi_allow)
vty_out(vty, " imsi allow %s%s", _nat->imsi_allow, VTY_NEWLINE);
if (_nat->imsi_deny)
vty_out(vty, " insi deny %s%s", _nat->imsi_deny, VTY_NEWLINE);
return CMD_SUCCESS;
}
@ -59,6 +63,10 @@ static void config_write_bsc_single(struct vty *vty, struct bsc_config *bsc)
vty_out(vty, " bsc %u%s", bsc->nr, VTY_NEWLINE);
vty_out(vty, " token %s%s", bsc->token, VTY_NEWLINE);
vty_out(vty, " lac %u%s", bsc->lac, VTY_NEWLINE);
if (bsc->imsi_allow)
vty_out(vty, " imsi allow %s%s", bsc->imsi_allow, VTY_NEWLINE);
if (bsc->imsi_deny)
vty_out(vty, " imsi deny %s%s", bsc->imsi_deny, VTY_NEWLINE);
}
static int config_write_bsc(struct vty *vty)
@ -114,6 +122,10 @@ DEFUN(show_bsc_cfg, show_bsc_cfg_cmd, "bsc config show",
llist_for_each_entry(conf, &_nat->bsc_configs, entry) {
vty_out(vty, "BSC token: '%s' lac: %u nr: %u%s",
conf->token, conf->lac, conf->nr, VTY_NEWLINE);
vty_out(vty, " imsi_allow: '%s' imsi_deny: '%s'%s",
conf->imsi_allow ? conf->imsi_allow: "any",
conf->imsi_deny ? conf->imsi_deny : "none",
VTY_NEWLINE);
}
return CMD_SUCCESS;
@ -157,6 +169,40 @@ DEFUN(cfg_nat, cfg_nat_cmd, "nat", "Configute the NAT")
return CMD_SUCCESS;
}
static void parse_reg(void *ctx, regex_t *reg, char **imsi, int argc, const char **argv)
{
if (*imsi) {
talloc_free(*imsi);
*imsi = NULL;
}
regfree(reg);
if (argc > 0) {
*imsi = talloc_strdup(ctx, argv[0]);
regcomp(reg, argv[0], 0);
}
}
DEFUN(cfg_nat_imsi_allow,
cfg_nat_imsi_allow_cmd,
"imsi allow [REGEXP]",
"Allow matching IMSIs to talk to the MSC. "
"The defualt is to allow everyone.")
{
parse_reg(_nat, &_nat->imsi_allow_re, &_nat->imsi_allow, argc, argv);
return CMD_SUCCESS;
}
DEFUN(cfg_nat_imsi_deny,
cfg_nat_imsi_deny_cmd,
"imsi deny [REGEXP]",
"Deny matching IMSIs to talk to the MSC. "
"The defualt is to not deny.")
{
parse_reg(_nat, &_nat->imsi_deny_re, &_nat->imsi_deny, argc, argv);
return CMD_SUCCESS;
}
/* per BSC configuration */
DEFUN(cfg_bsc, cfg_bsc_cmd, "bsc BSC_NR", "Select a BSC to configure\n")
{
@ -225,6 +271,30 @@ DEFUN(cfg_bsc_lac, cfg_bsc_lac_cmd, "location_area_code <0-65535>",
return CMD_SUCCESS;
}
DEFUN(cfg_bsc_imsi_allow,
cfg_bsc_imsi_allow_cmd,
"imsi allow [REGEXP]",
"Allow IMSIs with the following network to talk to the MSC."
"The default is to allow everyone)")
{
struct bsc_config *conf = vty->index;
parse_reg(conf, &conf->imsi_allow_re, &conf->imsi_allow, argc, argv);
return CMD_SUCCESS;
}
DEFUN(cfg_bsc_imsi_deny,
cfg_bsc_imsi_deny_cmd,
"imsi deny [REGEXP]",
"Deny IMSIs with the following network to talk to the MSC."
"The default is to not deny anyone.)")
{
struct bsc_config *conf = vty->index;
parse_reg(conf, &conf->imsi_deny_re, &conf->imsi_deny, argc, argv);
return CMD_SUCCESS;
}
int bsc_nat_vty_init(struct bsc_nat *nat)
{
_nat = nat;
@ -244,6 +314,8 @@ int bsc_nat_vty_init(struct bsc_nat *nat)
install_element(CONFIG_NODE, &cfg_nat_cmd);
install_node(&nat_node, config_write_nat);
install_default(NAT_NODE);
install_element(NAT_NODE, &cfg_nat_imsi_allow_cmd);
install_element(NAT_NODE, &cfg_nat_imsi_deny_cmd);
/* BSC subgroups */
install_element(NAT_NODE, &cfg_bsc_cmd);
@ -251,6 +323,8 @@ int bsc_nat_vty_init(struct bsc_nat *nat)
install_default(BSC_NODE);
install_element(BSC_NODE, &cfg_bsc_token_cmd);
install_element(BSC_NODE, &cfg_bsc_lac_cmd);
install_element(BSC_NODE, &cfg_bsc_imsi_allow_cmd);
install_element(BSC_NODE, &cfg_bsc_imsi_deny_cmd);
mgcp_vty_init();