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authorMax <msuraev@sysmocom.de>2016-04-13 11:36:39 +0200
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2016-04-14 08:37:34 -0400
commit4936448761a6ca42ab661d130f5202dfdabca426 (patch)
tree21748fc332ddf47e1a84fe56454dd2981a4fe633
parent82f5ecde6a10c3c22980822a892a3fb5c69acf4f (diff)
NAT: reload BSCs config dynamically
Add vty tests for BSC configuration reloading. Load BSCs configuration on bscs-config-file command: * remove all runtime configured BSC not in the config file * close connections to all BSC with updated token value Fixes: OS#1670 Sponsored-by: On-Waves ehf
-rw-r--r--openbsc/include/openbsc/bsc_nat.h5
-rw-r--r--openbsc/src/osmo-bsc_nat/bsc_nat_vty.c29
-rw-r--r--openbsc/tests/vty_test_runner.py120
3 files changed, 153 insertions, 1 deletions
diff --git a/openbsc/include/openbsc/bsc_nat.h b/openbsc/include/openbsc/bsc_nat.h
index 5ccc02e18..94ab0e5ff 100644
--- a/openbsc/include/openbsc/bsc_nat.h
+++ b/openbsc/include/openbsc/bsc_nat.h
@@ -35,6 +35,7 @@
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <regex.h>
+#include <stdbool.h>
#define DIR_BSC 1
#define DIR_MSC 2
@@ -164,6 +165,10 @@ struct bsc_config {
/* audio handling */
int max_endpoints;
+ /* used internally for reload handling */
+ bool remove;
+ bool token_updated;
+
/* backpointer */
struct bsc_nat *nat;
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
index b7b49e63a..55f3dbf4f 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_vty.c
@@ -39,6 +39,7 @@
#include <osmocom/sccp/sccp.h>
#include <stdlib.h>
+#include <stdbool.h>
static struct bsc_nat *_nat;
@@ -513,6 +514,8 @@ DEFUN(cfg_nat_include,
{
char *path;
int rc;
+ struct bsc_config *cf1, *cf2;
+ struct bsc_connection *con1, *con2;
if ('/' == argv[0][0])
bsc_replace_string(_nat, &_nat->resolved_path, argv[0]);
@@ -523,13 +526,32 @@ DEFUN(cfg_nat_include,
talloc_free(path);
}
+ llist_for_each_entry_safe(cf1, cf2, &_nat->bsc_configs, entry) {
+ cf1->remove = true;
+ cf1->token_updated = false;
+ }
+
rc = vty_read_config_file(_nat->resolved_path, NULL);
if (rc < 0) {
vty_out(vty, "Failed to parse the config file %s: %s%s",
_nat->resolved_path, strerror(-rc), VTY_NEWLINE);
return CMD_WARNING;
}
+
bsc_replace_string(_nat, &_nat->include_file, argv[0]);
+
+ llist_for_each_entry_safe(con1, con2, &_nat->bsc_connections,
+ list_entry) {
+ if (con1->cfg)
+ if (con1->cfg->token_updated || con1->cfg->remove)
+ bsc_close_connection(con1);
+ }
+
+ llist_for_each_entry_safe(cf1, cf2, &_nat->bsc_configs, entry) {
+ if (cf1->remove)
+ bsc_config_free(cf1);
+ }
+
return CMD_SUCCESS;
}
@@ -846,6 +868,7 @@ DEFUN(cfg_bsc, cfg_bsc_cmd, "bsc BSC_NR",
if (!bsc)
return CMD_WARNING;
+ bsc->remove = false;
vty->index = bsc;
vty->node = NAT_BSC_NODE;
@@ -858,6 +881,12 @@ DEFUN(cfg_bsc_token, cfg_bsc_token_cmd, "token TOKEN",
{
struct bsc_config *conf = vty->index;
+ if (strncmp(conf->token, argv[0], 128) != 0) {
+ vty_out(vty, "updated token: %s -> %s%s", conf->token, argv[0],
+ VTY_NEWLINE);
+ conf->token_updated = true;
+ }
+
bsc_replace_string(conf, &conf->token, argv[0]);
return CMD_SUCCESS;
}
diff --git a/openbsc/tests/vty_test_runner.py b/openbsc/tests/vty_test_runner.py
index d57412989..59fdd2f93 100644
--- a/openbsc/tests/vty_test_runner.py
+++ b/openbsc/tests/vty_test_runner.py
@@ -620,12 +620,61 @@ class TestVTYBSC(TestVTYGenericBSC):
class TestVTYNAT(TestVTYGenericBSC):
def vty_command(self):
- return ["./src/osmo-bsc_nat/osmo-bsc_nat", "-c",
+ return ["./src/osmo-bsc_nat/osmo-bsc_nat", "-l", "127.0.0.1", "-c",
"doc/examples/osmo-bsc_nat/osmo-bsc_nat.cfg"]
def vty_app(self):
return (4244, "src/osmo-bsc_nat/osmo-bsc_nat", "OsmoBSCNAT", "nat")
+ def testBSCreload(self):
+ # use separate ip to avoid interference with other tests
+ ip = "127.0.0.4"
+ self.vty.enable()
+ bscs1 = self.vty.command("show bscs-config")
+ nat_bsc_reload(self)
+ bscs2 = self.vty.command("show bscs-config")
+ # check that multiple calls to bscs-config-file give the same result
+ self.assertEquals(bscs1, bscs2)
+
+ # add new bsc
+ self.vty.command("configure terminal")
+ self.vty.command("nat")
+ self.vty.command("bsc 5")
+ self.vty.command("token key")
+ self.vty.command("location_area_code 666")
+ self.vty.command("end")
+
+ # update bsc token
+ self.vty.command("configure terminal")
+ self.vty.command("nat")
+ self.vty.command("bsc 1")
+ self.vty.command("token xyu")
+ self.vty.command("end")
+
+ nat_msc_ip(self, ip)
+ msc = nat_msc_test(self, ip)
+ b0 = nat_bsc_sock_test(0, "lol")
+ b1 = nat_bsc_sock_test(1, "xyu")
+ b2 = nat_bsc_sock_test(5, "key")
+
+ self.assertEquals("3 BSCs configured", self.vty.command("show nat num-bscs-configured"))
+ self.assertTrue(3 == nat_bsc_num_con(self))
+ self.assertEquals("MSC is connected: 1", self.vty.command("show msc connection"))
+
+ nat_bsc_reload(self)
+ bscs2 = self.vty.command("show bscs-config")
+ # check that the reset to initial config succeeded
+ self.assertEquals(bscs1, bscs2)
+
+ self.assertEquals("2 BSCs configured", self.vty.command("show nat num-bscs-configured"))
+ self.assertTrue(1 == nat_bsc_num_con(self))
+ rem = self.vty.command("show bsc connections").split(' ')
+ # remaining connection is for BSC0
+ self.assertEquals('0', rem[2])
+ # remaining connection is authorized
+ self.assertEquals('1', rem[4])
+ self.assertEquals("MSC is connected: 1", self.vty.command("show msc connection"))
+
def testVtyTree(self):
self.vty.enable()
self.assertTrue(self.vty.verify('configure terminal', ['']))
@@ -1032,6 +1081,75 @@ def ipa_send_resp(x, tk, verbose = False):
print "\tBSC -> NAT: IPA ID RESP"
return x.send("\x00\x07\xfe\x05\x00\x04\x01" + tk)
+def nat_bsc_reload(x):
+ x.vty.command("configure terminal")
+ x.vty.command("nat")
+ x.vty.command("bscs-config-file bscs.config")
+ x.vty.command("end")
+
+def nat_msc_ip(x, ip):
+ x.vty.command("configure terminal")
+ x.vty.command("nat")
+ x.vty.command("msc ip " + ip)
+ x.vty.command("end")
+
+def data2str(d):
+ return "".join("{:02x}".format(ord(c)) for c in d)
+
+def nat_msc_test(x, ip, verbose = False):
+ msc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+ msc.settimeout(32)
+ msc.bind((ip, 5000))
+ msc.listen(5)
+ if (verbose):
+ print "MSC is ready at " + ip
+ while "MSC is connected: 0" == x.vty.command("show msc connection"):
+ conn, addr = msc.accept()
+ if (verbose):
+ print "MSC got connection from ", addr
+ return conn
+
+def ipa_handle_small(x, verbose = False):
+ s = data2str(x.recv(4))
+ if "0001fe00" == s:
+ if (verbose):
+ print "\tBSC <- NAT: PING?"
+ ipa_send_pong(x, verbose)
+ elif "0001fe06" == s:
+ if (verbose):
+ print "\tBSC <- NAT: IPA ID ACK"
+ ipa_send_ack(x, verbose)
+ elif "0001fe00" == s:
+ if (verbose):
+ print "\tBSC <- NAT: PONG!"
+ else:
+ if (verbose):
+ print "\tBSC <- NAT: ", s
+
+def ipa_handle_resp(x, tk, verbose = False):
+ s = data2str(x.recv(38))
+ if "0023fe040108010701020103010401050101010011" in s:
+ ipa_send_resp(x, tk, verbose)
+ else:
+ if (verbose):
+ print "\tBSC <- NAT: ", s
+
+def nat_bsc_num_con(x):
+ return len(x.vty.command("show bsc connections").split('\n'))
+
+def nat_bsc_sock_test(nr, tk, verbose = False):
+ bsc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+ bsc.bind(('127.0.0.1' + str(nr), 0))
+ bsc.connect(('127.0.0.1', 5000))
+ if (verbose):
+ print "BSC%d " %nr
+ print "\tconnected to %s:%d" % bsc.getpeername()
+ ipa_handle_small(bsc, verbose)
+ ipa_handle_resp(bsc, tk, verbose)
+ bsc.recv(27) # MGCP msg
+ ipa_handle_small(bsc, verbose)
+ return bsc
+
def add_bsc_test(suite, workdir):
if not os.path.isfile(os.path.join(workdir, "src/osmo-bsc/osmo-bsc")):
print("Skipping the BSC test")