SGsAP_Emulation: Add functions to send MME or VLR reset
... including encoding/decoding of names between string and binary labels
Change-Id: I981c7c1d34f0db60031b5436739cd924e5a09407
diff --git a/library/DNS_Helpers.ttcn b/library/DNS_Helpers.ttcn
new file mode 100644
index 0000000..45c3a09
--- /dev/null
+++ b/library/DNS_Helpers.ttcn
@@ -0,0 +1,63 @@
+module DNS_Helpers {
+
+private function f_strchr(charstring s, char c) return integer {
+ var integer i;
+ for (i := 0; i < lengthof(s); i := i+1) {
+ if (s[i] == c) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+private function f_dns_enc_label(charstring str) return octetstring {
+ var octetstring ret;
+
+ ret[0] := int2oct(lengthof(str), 1);
+ return ret & char2oct(str);
+}
+
+function f_enc_dns_hostname(charstring str) return octetstring {
+ var octetstring ret := ''O;
+ while (lengthof(str) > 0) {
+ var integer dot_idx;
+ var octetstring lbl;
+
+ dot_idx := f_strchr(str, ".");
+ if (dot_idx >= 0) {
+ /* there is another dot */
+ lbl := f_dns_enc_label(substr(str, 0, dot_idx));
+ str := substr(str, dot_idx+1, lengthof(str)-dot_idx-1);
+ } else {
+ /* no more dot */
+ lbl := f_dns_enc_label(str);
+ str := "";
+ }
+ ret := ret & lbl;
+ }
+ return ret;
+}
+
+
+
+
+function f_dec_dns_hostname(octetstring inp) return charstring {
+ var charstring ret := "";
+ while (lengthof(inp) > 0) {
+ var integer label_len;
+ var charstring lbl;
+
+ label_len := oct2int(substr(inp, 0, 1));
+ lbl := oct2char(substr(inp, 1, label_len));
+ inp := substr(inp, 1+label_len, lengthof(inp)-1-label_len);
+
+ ret := ret & lbl;
+ if (lengthof(inp) > 0) {
+ ret := ret & ".";
+ }
+ }
+ return ret;
+}
+
+
+}
diff --git a/library/SGsAP_Emulation.ttcn b/library/SGsAP_Emulation.ttcn
index 0c37840..968bcdd 100644
--- a/library/SGsAP_Emulation.ttcn
+++ b/library/SGsAP_Emulation.ttcn
@@ -31,6 +31,7 @@
import from SGsAP_Templates all;
import from Osmocom_Types all;
import from IPL4asp_Types all;
+import from DNS_Helpers all;
type component SGsAP_ConnHdlr {
port SGsAP_Conn_PT SGsAP;
@@ -295,6 +296,7 @@
var hexstring imsi;
var SGsAP_RecvFrom mrf;
var PDU_SGsAP msg;
+ var charstring vlr_name, mme_name;
alt {
/* SGsAP from client */
@@ -329,6 +331,24 @@
f_create_expect(imsi, vc_conn);
SGsAP_PROC.reply(SGsAPEM_register:{imsi, vc_conn}) to vc_conn;
}
+ [] SGsAP_PROC.getcall(SGsAPEM_reset_mme:{?,-}) -> param(mme_name) {
+ var octetstring mme_enc, vlr_enc;
+ mme_enc := f_enc_dns_hostname(mme_name);
+ msg := f_sgsap_xceive(ts_SGsAP_RESET_IND_MME(mme_enc));
+ vlr_enc := msg.sGsAP_RESET_ACK.vLR_Name.name;
+ vlr_name := f_dec_dns_hostname(vlr_enc);
+ SGsAP_PROC.reply(SGsAPEM_reset_mme:{mme_name, vlr_name});
+ }
+ [] SGsAP_PROC.getcall(SGsAPEM_reset_vlr:{?,-}) -> param(vlr_name) {
+ var octetstring mme_enc, vlr_enc;
+ vlr_enc := f_enc_dns_hostname(vlr_name);
+ msg := f_sgsap_xceive(ts_SGsAP_RESET_IND_VLR(vlr_enc));
+ mme_enc := msg.sGsAP_RESET_ACK.mME_Name.name;
+ mme_name := f_dec_dns_hostname(mme_enc);
+ SGsAP_PROC.reply(SGsAPEM_reset_vlr:{vlr_name, mme_name});
+ }
+
+
}
}
@@ -343,8 +363,11 @@
signature SGsAPEM_register(in hexstring imsi, in SGsAP_ConnHdlr hdlr);
+signature SGsAPEM_reset_vlr(in charstring vlr_name, out charstring mme_name);
+signature SGsAPEM_reset_mme(in charstring mme_name, out charstring vlr_name);
+
type port SGsAPEM_PROC_PT procedure {
- inout SGsAPEM_register;
+ inout SGsAPEM_register, SGsAPEM_reset_vlr, SGsAPEM_reset_mme;
} with { extension "internal" };
/* Function that can be used as create_cb and will usse the expect table */
@@ -399,6 +422,25 @@
}
}
+/* client/conn_hdlr side function to use procedure port to send RESET from emulated MME */
+function f_sgsap_reset_mme(charstring mme_name) runs on SGsAP_ConnHdlr return charstring {
+ var charstring vlr_name;
+ SGsAP_PROC.call(SGsAPEM_reset_mme:{mme_name, -}) {
+ [] SGsAP_PROC.getreply(SGsAPEM_reset_mme:{mme_name,?}) -> param(vlr_name) {
+ return vlr_name;
+ };
+ }
+}
+
+/* client/conn_hdlr side function to use procedure port to send RESET from emulated VLR */
+function f_sgsap_reset_vlr(charstring vlr_name) runs on SGsAP_ConnHdlr return charstring {
+ var charstring mme_name;
+ SGsAP_PROC.call(SGsAPEM_reset_vlr:{vlr_name, -}) {
+ [] SGsAP_PROC.getreply(SGsAPEM_reset_vlr:{vlr_name,?}) -> param(mme_name) {
+ return mme_name;
+ };
+ }
+}
private function f_expect_table_init()
runs on SGsAP_Emulation_CT {