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osmo-remsim
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client: transmit RSPRO via bankd_conn_fsm 

This fixes a crash where the modem/phone would sent APDUs at a time
when there is no connection to the bankd yet.  If we transmit the
RSPRO PDUs via the FSM, this cannot happen.

Change-Id: I965666ae4622c403e63c060deaa4d80e9249d155
This commit is contained in:
Harald Welte 2019-03-30 08:58:40 +01:00
parent 2eee4507ca
commit 2f89b965a6
2 changed files with 22 additions and 3 deletions
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24
src/bankd_client_fsm.c
View File

@ -47,11 +47,21 @@ static void bankd_updown_cb(struct ipa_client_conn *conn, int up)
osmo_fsm_inst_dispatch(bc->bankd_fi, up ? BDC_E_TCP_UP: BDC_E_TCP_DOWN, 0);
}
int bankd_conn_send_rspro(struct bankd_client *bc, RsproPDU_t *rspro)
/* internal function, bypassing FSM state */
static int _bankd_conn_send_rspro(struct bankd_client *bc, RsproPDU_t *rspro)
{
return ipa_client_conn_send_rspro(bc->bankd_conn, rspro);
}
int bankd_conn_send_rspro(struct bankd_client *bc, RsproPDU_t *rspro)
{
if (osmo_fsm_inst_dispatch(bc->bankd_fi, BDC_E_RSPRO_TX, rspro) < 0) {
ASN_STRUCT_FREE(asn_DEF_RsproPDU, rspro);
return -1;
}
return 0;
}
/***********************************************************************
* bankd connection FSM: Remsim Client connection to Bankd
***********************************************************************/
@ -72,6 +82,7 @@ static const struct value_string remsim_client_bankd_fsm_event_names[] = {
OSMO_VALUE_STRING(BDC_E_TCP_UP),
OSMO_VALUE_STRING(BDC_E_TCP_DOWN),
OSMO_VALUE_STRING(BDC_E_CLIENT_CONN_RES),
OSMO_VALUE_STRING(BDC_E_RSPRO_TX),
{ 0, NULL }
};
@ -97,7 +108,7 @@ static void bdc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_s
/* FIXME: Send ClientConnReq */
pdu = rspro_gen_ConnectClientReq(&bc->srv_conn.own_comp_id, bc->srv_conn.clslot);
bankd_conn_send_rspro(bc, pdu);
_bankd_conn_send_rspro(bc, pdu);
}
static void bdc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data)
@ -117,10 +128,17 @@ static void bdc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *d
static void bdc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct bankd_client *bc = (struct bankd_client *) fi->priv;
RsproPDU_t *pdu = NULL;
switch (event) {
case BDC_E_TCP_DOWN:
osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2);
break;
case BDC_E_RSPRO_TX:
pdu = data;
_bankd_conn_send_rspro(bc, pdu);
break;
default:
OSMO_ASSERT(0);
}
@ -214,7 +232,7 @@ static const struct osmo_fsm_state bankd_conn_fsm_states[] = {
},
[BDC_ST_CONNECTED] = {
.name = "CONNECTED",
.in_event_mask = S(BDC_E_TCP_DOWN),
.in_event_mask = S(BDC_E_TCP_DOWN) | S(BDC_E_RSPRO_TX),
.out_state_mask = S(BDC_ST_REESTABLISH),
.action = bdc_st_connected,
},

1
src/client.h
View File

@ -16,6 +16,7 @@ enum bankd_conn_fsm_event {
BDC_E_TCP_UP, /* notify BDC that TCP connection is up/connected */
BDC_E_TCP_DOWN, /* notify BDC that TCP connection is down/disconnected */
BDC_E_CLIENT_CONN_RES, /* notify BDC that ClientConnectRes has been received */
BDC_E_RSPRO_TX, /* transmit a RSPRO PDU to the bankd */
};
extern struct osmo_fsm remsim_client_bankd_fsm;