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authorPau Espin Pedrol <pespin@sysmocom.de>2019-11-06 17:54:35 +0100
committerPau Espin Pedrol <pespin@sysmocom.de>2019-11-06 18:32:01 +0100
commitfec3785156cb86ecf71a1e9c0b5e5ca6eb637440 (patch)
tree67dbd66518a3c7c988944e72cc6a706563db6086
parent5695f25b3dc97459af3106806bab0ae6641901bb (diff)
xua: On new ASPAC, set and notify other ASPs as inactive
RFC4666 sec 4.3.4.3. ASP Active Procedures: """ In the case of an Override mode AS, receipt of an ASP Active message at an SGP causes the (re)direction of all traffic for the AS to the ASP that sent the ASP Active message. Any previously active ASP in the AS is now considered to be in the state ASP-INACTIVE and SHOULD no longer receive traffic from the SGP within the AS. The SGP or IPSP then MUST send a Notify message ("Alternate ASP_Active") to the previously active ASP in the AS and SHOULD stop traffic to/from that ASP. The ASP receiving this Notify MUST consider itself now in the ASP-INACTIVE state, if it is not already aware of this via inter-ASP communication with the Overriding ASP. """ Change-Id: I474f5cc1f6cbab72d010d1f8ac7ed2285e4c1c45
-rw-r--r--src/xua_as_fsm.c36
1 files changed, 35 insertions, 1 deletions
diff --git a/src/xua_as_fsm.c b/src/xua_as_fsm.c
index 5d0b327..c25902e 100644
--- a/src/xua_as_fsm.c
+++ b/src/xua_as_fsm.c
@@ -211,6 +211,37 @@ static bool check_any_other_asp_in_active(struct osmo_ss7_as *as, struct osmo_ss
return false;
}
+/* Tell other previously-active ASPs that a new ASP has been activated and mark
+ them as inactive. Used in override mode when an ASP becomes active. */
+static void notify_any_other_active_asp_as_inactive(struct osmo_ss7_as *as, struct osmo_ss7_asp *asp_cmp)
+{
+ unsigned int i;
+ struct msgb *msg;
+ struct osmo_xlm_prim_notify npar = {
+ .status_type = M3UA_NOTIFY_T_OTHER,
+ .status_info = M3UA_NOTIFY_I_OT_ALT_ASP_ACT,
+ };
+
+ if (asp_cmp->asp_id_present)
+ npar.asp_id = asp_cmp->asp_id;
+
+ for (i = 0; i < ARRAY_SIZE(as->cfg.asps); i++) {
+ struct osmo_ss7_asp *asp = as->cfg.asps[i];
+ if (!asp || !osmo_ss7_asp_active(asp))
+ continue;
+
+ if (asp_cmp == asp)
+ continue;
+
+ msg = encode_notify(&npar);
+ osmo_ss7_asp_send(asp, msg);
+
+ osmo_fsm_inst_state_chg(asp->fi, XUA_ASP_S_INACTIVE, 0, 0);
+ }
+
+ return;
+}
+
static void t_r_callback(void *_fi)
{
struct osmo_fsm_inst *fi = _fi;
@@ -321,7 +352,10 @@ static void xua_as_fsm_active(struct osmo_fsm_inst *fi, uint32_t event, void *da
}
break;
case XUA_ASPAS_ASP_ACTIVE_IND:
- /* ignore */
+ asp = data;
+ /* RFC466 sec 4.3.4.3 ASP Active Procedures*/
+ if (xafp->as->cfg.mode == OSMO_SS7_AS_TMOD_OVERRIDE)
+ notify_any_other_active_asp_as_inactive(xafp->as, asp);
break;
case XUA_AS_E_TRANSFER_REQ:
/* message for transmission */