gprs_gmm: introduce a GMM Attach Request FSM
The old GMM Attach Request handling used a recursive function
which can not handle certain states and is quite complex and hard to
extend.
The new FSM handles such request in a FSM and can be called multiple
times.
Change-Id: I58b9c17be9776a03bb2a5b21e99135cfefc8c912
diff --git a/include/osmocom/sgsn/gprs_gmm.h b/include/osmocom/sgsn/gprs_gmm.h
index d12eaf9..ffcebd3 100644
--- a/include/osmocom/sgsn/gprs_gmm.h
+++ b/include/osmocom/sgsn/gprs_gmm.h
@@ -40,6 +40,8 @@
uint8_t gmm_cause);
int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm);
+int gprs_gmm_attach_req_ies(struct msgb *a, struct msgb *b);
+
/* TODO: move extract_subscr_* when gsm48_gmm_authorize() got removed */
void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx);
void extract_subscr_hlr(struct sgsn_mm_ctx *ctx);