| /*! \file iu_up.c |
| * IuUP (Iu User Plane) according to 3GPP TS 25.415 */ |
| /* |
| * (C) 2017 by Harald Welte <laforge@gnumonks.org> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <errno.h> |
| #include <inttypes.h> |
| |
| #include <osmocom/core/crc8gen.h> |
| #include <osmocom/core/crc16gen.h> |
| #include <osmocom/core/fsm.h> |
| #include <osmocom/core/prim.h> |
| #include <osmocom/core/timer.h> |
| #include <osmocom/core/logging.h> |
| |
| #include <osmocom/gsm/prim.h> |
| #include <osmocom/gsm/protocol/gsm_25_415.h> |
| #include <osmocom/gsm/iuup.h> |
| |
| /*********************************************************************** |
| * CRC Calculation |
| ***********************************************************************/ |
| |
| /* Section 6.6.3.8 Header CRC */ |
| const struct osmo_crc8gen_code iuup_hdr_crc_code = { |
| .bits = 6, |
| .poly = 47, |
| .init = 0, |
| .remainder = 0, |
| }; |
| |
| /* Section 6.6.3.9 Payload CRC */ |
| const struct osmo_crc16gen_code iuup_data_crc_code = { |
| .bits = 10, |
| .poly = 563, |
| .init = 0, |
| .remainder = 0, |
| }; |
| |
| static int iuup_get_payload_offset(const uint8_t *iuup_pdu) |
| { |
| uint8_t pdu_type = iuup_pdu[0] >> 4; |
| switch (pdu_type) { |
| case 0: |
| case 14: |
| return 4; |
| case 1: |
| return 3; |
| default: |
| return -1; |
| } |
| } |
| |
| int osmo_iuup_compute_payload_crc(const uint8_t *iuup_pdu, unsigned int pdu_len) |
| { |
| ubit_t buf[1024*8]; |
| uint8_t pdu_type; |
| int offset, payload_len_bytes; |
| |
| if (pdu_len < 1) |
| return -1; |
| |
| pdu_type = iuup_pdu[0] >> 4; |
| |
| /* Type 1 has no CRC */ |
| if (pdu_type == 1) |
| return 0; |
| |
| offset = iuup_get_payload_offset(iuup_pdu); |
| if (offset < 0) |
| return offset; |
| |
| if (pdu_len < offset) |
| return -1; |
| |
| payload_len_bytes = pdu_len - offset; |
| osmo_pbit2ubit(buf, iuup_pdu+offset, payload_len_bytes*8); |
| return osmo_crc16gen_compute_bits(&iuup_data_crc_code, buf, payload_len_bytes*8); |
| } |
| |
| int osmo_iuup_compute_header_crc(const uint8_t *iuup_pdu, unsigned int pdu_len) |
| { |
| ubit_t buf[2*8]; |
| |
| if (pdu_len < 2) |
| return -1; |
| |
| osmo_pbit2ubit(buf, iuup_pdu, 2*8); |
| return osmo_crc8gen_compute_bits(&iuup_hdr_crc_code, buf, 2*8); |
| } |
| |
| /*********************************************************************** |
| * Internal State / FSM (Annex B) |
| ***********************************************************************/ |
| |
| #define S(x) (1 << (x)) |
| |
| #define IUUP_TIMER_INIT 1 |
| #define IUUP_TIMER_TA 2 |
| #define IUUP_TIMER_RC 3 |
| |
| struct osmo_timer_nt { |
| uint32_t n; /* number of repetitions */ |
| struct osmo_iuup_tnl_prim *retrans_itp; |
| struct osmo_timer_list timer; |
| }; |
| |
| struct osmo_iuup_instance { |
| struct osmo_iuup_rnl_config config; |
| struct osmo_fsm_inst *fi; |
| |
| uint8_t mode_version; |
| |
| struct { |
| struct osmo_timer_nt init; |
| struct osmo_timer_nt ta; |
| struct osmo_timer_nt rc; |
| } timer; |
| /* call-back function to pass primitives up to the user */ |
| osmo_prim_cb user_prim_cb; |
| void *user_prim_priv; |
| osmo_prim_cb transport_prim_cb; |
| void *transport_prim_priv; |
| uint8_t type14_fn; /* 2 bits */ |
| }; |
| |
| enum iuup_fsm_state { |
| IUUP_FSM_ST_NULL, |
| IUUP_FSM_ST_INIT, |
| IUUP_FSM_ST_TrM_DATA_XFER_READY, |
| IUUP_FSM_ST_SMpSDU_DATA_XFER_READY, |
| }; |
| |
| enum iuup_fsm_event { |
| IUUP_FSM_EVT_IUUP_CONFIG_REQ, |
| IUUP_FSM_EVT_IUUP_DATA_REQ, |
| IUUP_FSM_EVT_IUUP_DATA_IND, |
| IUUP_FSM_EVT_IUUP_STATUS_REQ, |
| IUUP_FSM_EVT_IUUP_STATUS_IND, |
| IUUP_FSM_EVT_SSASAR_UNITDATA_REQ, |
| IUUP_FSM_EVT_SSASAR_UNITDATA_IND, |
| IUUP_FSM_EVT_IUUP_UNITDATA_REQ, |
| IUUP_FSM_EVT_IUUP_UNITDATA_IND, |
| IUUP_FSM_EVT_INIT, |
| IUUP_FSM_EVT_LAST_INIT_ACK, |
| IUUP_FSM_EVT_INIT_NACK, |
| }; |
| |
| static const struct value_string iuup_fsm_event_names[] = { |
| { IUUP_FSM_EVT_IUUP_CONFIG_REQ, "IuUP-CONFIG-req" }, |
| { IUUP_FSM_EVT_IUUP_DATA_REQ, "IuUP-DATA-req" }, |
| { IUUP_FSM_EVT_IUUP_DATA_IND, "IuUP-DATA-ind" }, |
| { IUUP_FSM_EVT_IUUP_STATUS_REQ, "IuUP-STATUS-req" }, |
| { IUUP_FSM_EVT_IUUP_STATUS_IND, "IuUP-STATUS-ind" }, |
| { IUUP_FSM_EVT_SSASAR_UNITDATA_REQ, "SSSAR-UNITDATA-req" }, |
| { IUUP_FSM_EVT_SSASAR_UNITDATA_IND, "SSSAR-UNITDATA-ind" }, |
| { IUUP_FSM_EVT_IUUP_UNITDATA_REQ, "IuUP-UNITDATA-req" }, |
| { IUUP_FSM_EVT_IUUP_UNITDATA_IND, "IuUP-UNITDATA-ind" }, |
| { IUUP_FSM_EVT_INIT, "INIT" }, |
| { IUUP_FSM_EVT_LAST_INIT_ACK, "LAST_INIT_ACK" }, |
| { IUUP_FSM_EVT_INIT_NACK, "INIT_NACK" }, |
| { 0, NULL } |
| }; |
| |
| static inline uint8_t iuup_get_pdu_type(const uint8_t *data) |
| { |
| return data[0] >> 4; |
| } |
| |
| static inline uint8_t iuup_get_hdr_crc(const uint8_t *data) |
| { |
| return data[2] >> 2; |
| } |
| |
| /* Helper functions to store non-packed structs in msgb so that pointers are properly aligned: */ |
| #define IUUP_MSGB_SIZE 4096 |
| #define PTR_ALIGNMENT_BYTES 8 |
| #define IUUP_MSGB_HEADROOM_MIN_REQUIRED (OSMO_MAX(sizeof(struct osmo_iuup_tnl_prim), sizeof(struct osmo_iuup_rnl_prim)) + (PTR_ALIGNMENT_BYTES - 1)) |
| static inline struct msgb *osmo_iuup_msgb_alloc_c(void *ctx, size_t size) |
| { |
| OSMO_ASSERT(size > IUUP_MSGB_HEADROOM_MIN_REQUIRED); |
| return msgb_alloc_headroom_c(ctx, size, IUUP_MSGB_HEADROOM_MIN_REQUIRED, "iuup-msgb"); |
| } |
| |
| /* push data so that the resulting pointer to write to is aligned to 8 byte */ |
| static inline __attribute__((assume_aligned(PTR_ALIGNMENT_BYTES))) |
| unsigned char *aligned_msgb_push(struct msgb *msg, unsigned int len) |
| { |
| uint8_t *ptr = (msgb_data(msg) - len); |
| size_t extra_size = ((uintptr_t)ptr & (PTR_ALIGNMENT_BYTES - 1)); |
| |
| return msgb_push(msg, len + extra_size); |
| } |
| |
| struct osmo_iuup_rnl_prim *osmo_iuup_rnl_prim_alloc(void *ctx, unsigned int primitive, unsigned int operation, unsigned int size) |
| { |
| struct msgb *msg; |
| struct osmo_iuup_rnl_prim *irp; |
| |
| msg = osmo_iuup_msgb_alloc_c(ctx, size); |
| irp = (struct osmo_iuup_rnl_prim *)aligned_msgb_push(msg, sizeof(*irp)); |
| osmo_prim_init(&irp->oph, SAP_IUUP_RNL, primitive, operation, msg); |
| return irp; |
| } |
| |
| struct osmo_iuup_tnl_prim *osmo_iuup_tnl_prim_alloc(void *ctx, unsigned int primitive, unsigned int operation, unsigned int size) |
| { |
| struct msgb *msg; |
| struct osmo_iuup_tnl_prim *itp; |
| |
| msg = osmo_iuup_msgb_alloc_c(ctx, size); |
| itp = (struct osmo_iuup_tnl_prim *) aligned_msgb_push(msg, sizeof(*itp)); |
| osmo_prim_init(&itp->oph, SAP_IUUP_TNL, primitive, operation, msg); |
| return itp; |
| } |
| |
| /* 6.6.2.3.2 */ |
| static struct osmo_iuup_tnl_prim *itp_ctrl_ack_alloc(struct osmo_iuup_instance *iui, enum iuup_procedure proc_ind, uint8_t fn) |
| { |
| struct osmo_iuup_tnl_prim *itp; |
| struct iuup_ctrl_ack *ack; |
| itp = osmo_iuup_tnl_prim_alloc(iui, OSMO_IUUP_TNL_UNITDATA, PRIM_OP_REQUEST, IUUP_MSGB_SIZE); |
| itp->oph.msg->l2h = msgb_put(itp->oph.msg, sizeof(struct iuup_ctrl_ack)); |
| ack = (struct iuup_ctrl_ack *) msgb_l2(itp->oph.msg); |
| *ack = (struct iuup_ctrl_ack){ |
| .hdr = { |
| .frame_nr = fn, |
| .ack_nack = IUUP_AN_ACK, |
| .pdu_type = IUUP_PDU_T_CONTROL, |
| .proc_ind = proc_ind, |
| .mode_version = iui->mode_version, |
| .payload_crc_hi = 0, |
| .header_crc = 0, |
| .payload_crc_lo = 0, |
| }, |
| }; |
| ack->hdr.header_crc = osmo_iuup_compute_header_crc(msgb_l2(itp->oph.msg), msgb_l2len(itp->oph.msg)); |
| return itp; |
| } |
| |
| /* 6.6.2.3.3 */ |
| static struct osmo_iuup_tnl_prim *tnp_ctrl_nack_alloc(struct osmo_iuup_instance *iui, enum iuup_procedure proc_ind, enum iuup_error_cause error_cause, uint8_t fn) |
| { |
| struct osmo_iuup_tnl_prim *itp; |
| struct iuup_ctrl_nack *nack; |
| itp = osmo_iuup_tnl_prim_alloc(iui, OSMO_IUUP_TNL_UNITDATA, PRIM_OP_REQUEST, IUUP_MSGB_SIZE); |
| itp->oph.msg->l2h = msgb_put(itp->oph.msg, sizeof(struct iuup_ctrl_nack)); |
| nack = (struct iuup_ctrl_nack *) msgb_l2(itp->oph.msg); |
| *nack = (struct iuup_ctrl_nack){ |
| .hdr = { |
| .frame_nr = fn, |
| .ack_nack = IUUP_AN_NACK, |
| .pdu_type = IUUP_PDU_T_CONTROL, |
| .proc_ind = proc_ind, |
| .mode_version = iui->mode_version, |
| .payload_crc_hi = 0, |
| .header_crc = 0, |
| .payload_crc_lo = 0, |
| }, |
| .spare = 0, |
| .error_cause = error_cause, |
| }; |
| nack->hdr.header_crc = osmo_iuup_compute_header_crc(msgb_l2(itp->oph.msg), msgb_l2len(itp->oph.msg)); |
| return itp; |
| } |
| |
| /* 6.6.2.3.4.1 */ |
| static struct osmo_iuup_tnl_prim *tnp_ctrl_init_alloc(struct osmo_iuup_instance *iui) |
| { |
| struct osmo_iuup_tnl_prim *itp; |
| struct iuup_pdutype14_hdr *hdr; |
| struct iuup_ctrl_init_hdr *ihdr; |
| struct iuup_ctrl_init_rfci_hdr *ihdr_rfci; |
| struct iuup_ctrl_init_tail *itail; |
| unsigned int i, j; |
| uint16_t payload_crc; |
| uint8_t rfci_cnt; |
| struct msgb *msg; |
| |
| itp = osmo_iuup_tnl_prim_alloc(iui, OSMO_IUUP_TNL_UNITDATA, PRIM_OP_REQUEST, IUUP_MSGB_SIZE); |
| msg = itp->oph.msg; |
| |
| msg->l2h = msgb_put(msg, sizeof(*hdr)); |
| hdr = (struct iuup_pdutype14_hdr *)msgb_l2(msg); |
| hdr->frame_nr = iui->type14_fn++; |
| hdr->ack_nack = IUUP_AN_PROCEDURE; |
| hdr->pdu_type = IUUP_PDU_T_CONTROL; |
| hdr->proc_ind = IUUP_PROC_INIT; |
| hdr->mode_version = 0; /* Use here the minimum version required to negotiate */ |
| hdr->header_crc = osmo_iuup_compute_header_crc(msgb_l2(msg), msgb_l2len(msg)); |
| |
| ihdr = (struct iuup_ctrl_init_hdr *)msgb_put(msg, sizeof(*ihdr)); |
| ihdr->chain_ind = 0; /* this frame is the last frame for the procedure. TODO: support several */ |
| ihdr->num_subflows_per_rfci = iui->config.num_subflows; |
| ihdr->ti = iui->config.IPTIs_present ? 1 : 0; |
| ihdr->spare = 0; |
| |
| /* RFCI + subflow size part: */ |
| rfci_cnt = 0; |
| for (i = 0; i < ARRAY_SIZE(iui->config.rfci); i++) { |
| bool last; |
| uint8_t len_size; |
| struct osmo_iuup_rfci *rfci = &iui->config.rfci[i]; |
| if (!rfci->used) |
| continue; |
| rfci_cnt++; |
| last = (rfci_cnt == iui->config.num_rfci); |
| |
| len_size = 1; |
| for (j = 0; j < iui->config.num_subflows; j++) { |
| if (rfci->subflow_sizes[j] > UINT8_MAX) |
| len_size = 2; |
| } |
| |
| ihdr_rfci = (struct iuup_ctrl_init_rfci_hdr *)msgb_put(msg, sizeof(*ihdr_rfci) + len_size * iui->config.num_subflows); |
| ihdr_rfci->rfci = rfci->id; |
| ihdr_rfci->li = len_size - 1; |
| ihdr_rfci->lri = last; |
| if (len_size == 2) { |
| uint16_t *buf = (uint16_t *)&ihdr_rfci->subflow_length[0]; |
| for (j = 0; j < iui->config.num_subflows; j++) |
| osmo_store16be(rfci->subflow_sizes[j], buf++); |
| } else { |
| for (j = 0; j < iui->config.num_subflows; j++) |
| ihdr_rfci->subflow_length[j] = rfci->subflow_sizes[j]; |
| } |
| /* early loop termination: */ |
| if (last) |
| break; |
| } |
| /* Sanity check: */ |
| if (rfci_cnt != iui->config.num_rfci) { |
| LOGP(DLIUUP, LOGL_ERROR, "rfci_cnt %u != num_rfci %u\n", |
| rfci_cnt, iui->config.num_rfci); |
| msgb_free(msg); |
| return NULL; |
| } |
| |
| if (iui->config.IPTIs_present) { |
| uint8_t num_bytes = (iui->config.num_rfci + 1) / 2; |
| uint8_t *buf = msgb_put(msg, num_bytes); |
| rfci_cnt = 0; |
| for (i = 0; i < ARRAY_SIZE(iui->config.rfci); i++) { |
| struct osmo_iuup_rfci *rfci = &iui->config.rfci[i]; |
| if (!rfci->used) |
| continue; |
| if (!(rfci_cnt & 0x01)) /* is even: */ |
| buf[rfci_cnt / 2] = (((uint8_t)rfci->IPTI) << 4); |
| else |
| buf[rfci_cnt / 2] |= (rfci->IPTI & 0x0F); |
| rfci_cnt++; |
| /* early loop termination: */ |
| if (rfci_cnt == iui->config.num_rfci) |
| break; |
| } |
| } |
| |
| itail = (struct iuup_ctrl_init_tail *)msgb_put(msg, sizeof(*itail)); |
| osmo_store16be(iui->config.supported_versions_mask, &itail->versions_supported); |
| itail->spare = 0; |
| itail->data_pdu_type = iui->config.data_pdu_type; |
| |
| payload_crc = osmo_iuup_compute_payload_crc(msgb_l2(msg), msgb_l2len(msg)); |
| hdr->payload_crc_hi = (payload_crc >> 8) & 0x03; |
| hdr->payload_crc_lo = payload_crc & 0xff; |
| |
| |
| return itp; |
| } |
| |
| static struct osmo_iuup_rnl_prim *irp_init_ind_alloc(struct osmo_iuup_instance *iui) |
| { |
| struct osmo_iuup_rnl_prim *irp; |
| |
| irp = osmo_iuup_rnl_prim_alloc(iui, OSMO_IUUP_RNL_STATUS, PRIM_OP_INDICATION, IUUP_MSGB_SIZE); |
| irp->u.status.procedure = IUUP_PROC_INIT; |
| irp->u.status.u.initialization.mode_version = iui->mode_version; |
| irp->u.status.u.initialization.data_pdu_type = iui->config.data_pdu_type; |
| irp->u.status.u.initialization.num_subflows = iui->config.num_subflows; |
| irp->u.status.u.initialization.num_rfci = iui->config.num_rfci; |
| irp->u.status.u.initialization.IPTIs_present = iui->config.IPTIs_present; |
| memcpy(irp->u.status.u.initialization.rfci, iui->config.rfci, sizeof(iui->config.rfci)); |
| return irp; |
| } |
| |
| /* transform a RNL data primitive into a TNL data primitive (down the stack) */ |
| static struct osmo_iuup_tnl_prim *rnl_to_tnl_data(struct osmo_iuup_instance *iui, |
| struct osmo_iuup_rnl_prim *irp) |
| { |
| struct osmo_iuup_tnl_prim *itp; |
| struct osmo_iuup_rnl_data dt; |
| struct msgb *msg; |
| uint16_t payload_crc; |
| struct iuup_pdutype0_hdr *h0; |
| struct iuup_pdutype1_hdr *h1; |
| |
| OSMO_ASSERT(OSMO_PRIM_HDR(&irp->oph) == OSMO_PRIM(OSMO_IUUP_RNL_DATA, PRIM_OP_REQUEST)); |
| |
| msg = irp->oph.msg; |
| dt = irp->u.data; |
| |
| /* pull up to the IuUP payload and push a new primitive header in front */ |
| msgb_pull_to_l3(msg); |
| |
| /* push the PDU TYPE 0 / 1 header in front of the payload */ |
| switch (iui->config.data_pdu_type) { |
| case 0: |
| msg->l2h = msgb_push(msg, sizeof(*h0)); |
| h0 = (struct iuup_pdutype0_hdr *)msg->l2h; |
| h0->frame_nr = dt.frame_nr; |
| h0->pdu_type = IUUP_PDU_T_DATA_CRC; |
| h0->rfci = dt.rfci; |
| h0->fqc = dt.fqc; |
| h0->header_crc = osmo_iuup_compute_header_crc(msgb_l2(msg), msgb_l2len(msg)); |
| payload_crc = osmo_iuup_compute_payload_crc(msgb_l2(msg), msgb_l2len(msg)); |
| h0->payload_crc_hi = (payload_crc >> 8) & 0x03; |
| h0->payload_crc_lo = payload_crc & 0xff; |
| break; |
| case 1: |
| msg->l2h = msgb_push(msg, sizeof(*h1)); |
| h1 = (struct iuup_pdutype1_hdr *)msg->l2h; |
| h1->frame_nr = dt.frame_nr; |
| h1->pdu_type = IUUP_PDU_T_DATA_NOCRC; |
| h1->rfci = dt.rfci; |
| h1->fqc = dt.fqc; |
| h1->header_crc = osmo_iuup_compute_header_crc(msgb_l2(msg), msgb_l2len(msg)); |
| h1->spare = 0; |
| break; |
| default: |
| OSMO_ASSERT(0); |
| } |
| |
| /* Avoid allocating irp out of 8byte-aligned address, Asan is not happy with it */ |
| itp = (struct osmo_iuup_tnl_prim *) aligned_msgb_push(msg, sizeof(*itp)); |
| osmo_prim_init(&itp->oph, SAP_IUUP_TNL, OSMO_IUUP_TNL_UNITDATA, PRIM_OP_REQUEST, msg); |
| |
| return itp; |
| } |
| |
| /* transform a TNL primitive into a RNL primitive (up the stack) */ |
| static struct osmo_iuup_rnl_prim *tnl_to_rnl_data(struct osmo_iuup_tnl_prim *itp) |
| { |
| struct msgb *msg; |
| struct iuup_pdutype0_hdr *h0; |
| struct iuup_pdutype1_hdr *h1; |
| struct osmo_iuup_rnl_data dt; |
| struct osmo_iuup_rnl_prim *irp; |
| |
| msg = itp->oph.msg; |
| |
| OSMO_ASSERT(OSMO_PRIM_HDR(&itp->oph) == OSMO_PRIM(OSMO_IUUP_TNL_UNITDATA, PRIM_OP_INDICATION)); |
| |
| switch (iuup_get_pdu_type(msgb_l2(msg))) { |
| case IUUP_PDU_T_DATA_CRC: |
| h0 = (struct iuup_pdutype0_hdr *) msgb_l2(msg); |
| dt.rfci = h0->rfci; |
| dt.frame_nr = h0->frame_nr; |
| dt.fqc = h0->fqc; |
| break; |
| case IUUP_PDU_T_DATA_NOCRC: |
| h1 = (struct iuup_pdutype1_hdr *) msgb_l2(msg); |
| dt.rfci = h1->rfci; |
| dt.frame_nr = h1->frame_nr; |
| dt.fqc = h1->fqc; |
| break; |
| default: |
| OSMO_ASSERT(0); |
| } |
| |
| /* pull up to the IuUP payload and push a new primitive header in front */ |
| msgb_pull_to_l3(msg); |
| |
| /* Avoid allocating irp out of 8byte-aligned address, Asan is not happy with it */ |
| irp = (struct osmo_iuup_rnl_prim *) aligned_msgb_push(msg, sizeof(*irp)); |
| osmo_prim_init(&irp->oph, SAP_IUUP_RNL, OSMO_IUUP_RNL_DATA, PRIM_OP_INDICATION, msg); |
| irp->u.data = dt; |
| |
| return irp; |
| } |
| |
| static struct osmo_iuup_rnl_prim *irp_error_event_alloc_c(void *ctx, enum iuup_error_cause cause, enum iuup_error_distance distance) |
| { |
| struct osmo_iuup_rnl_prim *irp; |
| struct msgb *msg; |
| msg = msgb_alloc_c(ctx, sizeof(*irp), "iuup-tx"); |
| irp = (struct osmo_iuup_rnl_prim *) msgb_put(msg, sizeof(*irp)); |
| osmo_prim_init(&irp->oph, SAP_IUUP_RNL, OSMO_IUUP_RNL_STATUS, PRIM_OP_INDICATION, msg); |
| irp->u.status.procedure = IUUP_PROC_ERR_EVENT; |
| irp->u.status.u.error_event.cause = cause; |
| irp->u.status.u.error_event.distance = distance; |
| return irp; |
| } |
| |
| static struct osmo_iuup_tnl_prim *itp_copy_c(void *ctx, const struct osmo_iuup_tnl_prim *src_itp) |
| { |
| struct msgb *msg; |
| struct osmo_iuup_tnl_prim *dst_itp; |
| |
| msg = msgb_copy_c(ctx, src_itp->oph.msg, "iuup-tx-retrans"); |
| dst_itp = (struct osmo_iuup_tnl_prim *)msgb_data(msg); |
| dst_itp->oph.msg = msg; |
| return dst_itp; |
| } |
| |
| static void retransmit_initialization(struct osmo_iuup_instance *iui) |
| { |
| struct osmo_iuup_tnl_prim *itp; |
| iui->fi->T = IUUP_TIMER_INIT; |
| osmo_timer_schedule(&iui->fi->timer, iui->config.t_init.t_ms / 1000, (iui->config.t_init.t_ms % 1000) * 1000); |
| itp = itp_copy_c(iui, iui->timer.init.retrans_itp); |
| iui->transport_prim_cb(&itp->oph, iui->transport_prim_priv); |
| } |
| |
| /* return: whether the last Init was Acked correctly and hence can transition to next state */ |
| static bool iuup_rx_initialization(struct osmo_iuup_instance *iui, struct osmo_iuup_tnl_prim *itp) |
| { |
| struct iuup_pdutype14_hdr *hdr; |
| struct iuup_ctrl_init_hdr *ihdr; |
| struct iuup_ctrl_init_rfci_hdr *ihdr_rfci; |
| struct iuup_ctrl_init_tail *itail; |
| enum iuup_error_cause err_cause; |
| uint8_t num_rfci = 0; |
| int i; |
| bool is_last; |
| uint16_t remote_mask, match_mask; |
| struct osmo_iuup_rnl_prim *irp; |
| struct osmo_iuup_tnl_prim *resp; |
| |
| /* TODO: whenever we check message boundaries, length, etc. and we fail, send NACK */ |
| |
| hdr = (struct iuup_pdutype14_hdr *)msgb_l2(itp->oph.msg); |
| ihdr = (struct iuup_ctrl_init_hdr *)hdr->payload; |
| if (ihdr->num_subflows_per_rfci == 0) { |
| LOGPFSML(iui->fi, LOGL_NOTICE, "Initialization: Unexpected num_subflows=0 received\n"); |
| err_cause = IUUP_ERR_CAUSE_UNEXPECTED_VALUE; |
| goto send_nack; |
| } |
| ihdr_rfci = (struct iuup_ctrl_init_rfci_hdr *)ihdr->rfci_data; |
| |
| do { |
| struct osmo_iuup_rfci *rfci = &iui->config.rfci[num_rfci]; |
| uint8_t l_size_bytes = ihdr_rfci->li + 1; |
| is_last = ihdr_rfci->lri; |
| if (num_rfci >= IUUP_MAX_RFCIS) { |
| LOGPFSML(iui->fi, LOGL_NOTICE, "Initialization: Too many RFCIs received (%u)\n", |
| num_rfci); |
| err_cause = IUUP_ERR_CAUSE_UNEXPECTED_RFCI; |
| goto send_nack; |
| } |
| rfci->used = 1; |
| rfci->id = ihdr_rfci->rfci; |
| if (l_size_bytes == 2) { |
| uint16_t *subflow_size = (uint16_t *)ihdr_rfci->subflow_length; |
| for (i = 0; i < ihdr->num_subflows_per_rfci; i++) { |
| rfci->subflow_sizes[i] = osmo_load16be(subflow_size); |
| subflow_size++; |
| } |
| } else { |
| uint8_t *subflow_size = ihdr_rfci->subflow_length; |
| for (i = 0; i < ihdr->num_subflows_per_rfci; i++) { |
| rfci->subflow_sizes[i] = *subflow_size; |
| subflow_size++; |
| } |
| } |
| num_rfci++; |
| ihdr_rfci++; |
| ihdr_rfci = (struct iuup_ctrl_init_rfci_hdr *)(((uint8_t *)ihdr_rfci) + ihdr->num_subflows_per_rfci * l_size_bytes); |
| } while (!is_last); |
| |
| if (ihdr->ti) { /* Timing information present */ |
| uint8_t *buf = (uint8_t *)ihdr_rfci; |
| uint8_t num_bytes = (num_rfci + 1) / 2; |
| iui->config.IPTIs_present = true; |
| for (i = 0; i < num_bytes - 1; i++) { |
| iui->config.rfci[i*2].IPTI = *buf >> 4; |
| iui->config.rfci[i*2 + 1].IPTI = *buf & 0x0f; |
| buf++; |
| } |
| iui->config.rfci[i*2].IPTI = *buf >> 4; |
| if (!(num_rfci & 0x01)) /* is even: */ |
| iui->config.rfci[i*2 + 1].IPTI = *buf & 0x0f; |
| buf++; |
| itail = (struct iuup_ctrl_init_tail *)buf; |
| } else { |
| iui->config.IPTIs_present = false; |
| itail = (struct iuup_ctrl_init_tail *)ihdr_rfci; |
| } |
| if (itail->data_pdu_type > 1) { |
| LOGPFSML(iui->fi, LOGL_NOTICE, "Initialization: Unexpected Data PDU Type %u received\n", itail->data_pdu_type); |
| err_cause = IUUP_ERR_CAUSE_UNEXPECTED_VALUE; |
| goto send_nack; |
| } |
| |
| remote_mask = osmo_load16be(&itail->versions_supported); |
| match_mask = (remote_mask & iui->config.supported_versions_mask); |
| if (match_mask == 0x0000) { |
| LOGPFSML(iui->fi, LOGL_NOTICE, |
| "Initialization: No match in supported versions local=0x%04x vs remote=0x%04x\n", |
| iui->config.supported_versions_mask, remote_mask); |
| err_cause = IUUP_ERR_CAUSE_UNEXPECTED_VALUE; |
| goto send_nack; |
| } |
| for (i = 15; i >= 0; i--) { |
| if (match_mask & (1<<i)) { |
| iui->mode_version = i; |
| break; |
| } |
| } |
| |
| iui->config.num_rfci = num_rfci; |
| iui->config.num_subflows = ihdr->num_subflows_per_rfci; |
| iui->config.data_pdu_type = itail->data_pdu_type; |
| |
| irp = irp_init_ind_alloc(iui); |
| iui->user_prim_cb(&irp->oph, iui->user_prim_priv); |
| |
| LOGPFSML(iui->fi, LOGL_DEBUG, "Tx Initialization ACK\n"); |
| resp = itp_ctrl_ack_alloc(iui, IUUP_PROC_INIT, hdr->frame_nr); |
| iui->transport_prim_cb(&resp->oph, iui->transport_prim_priv); |
| return ihdr->chain_ind == 0; |
| send_nack: |
| LOGPFSML(iui->fi, LOGL_NOTICE, "Tx Initialization NACK cause=%u orig_message=%s\n", |
| err_cause, osmo_hexdump((const unsigned char *) msgb_l2(itp->oph.msg), msgb_l2len(itp->oph.msg))); |
| resp = tnp_ctrl_nack_alloc(iui, IUUP_PROC_INIT, err_cause, hdr->frame_nr); |
| iui->transport_prim_cb(&resp->oph, iui->transport_prim_priv); |
| return false; |
| } |
| |
| /********************** |
| * FSM STATE FUNCTIONS |
| **********************/ |
| static void iuup_fsm_null(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| struct osmo_iuup_instance *iui = fi->priv; |
| struct osmo_iuup_rnl_prim *user_prim = NULL; |
| |
| switch (event) { |
| case IUUP_FSM_EVT_IUUP_CONFIG_REQ: |
| user_prim = data; |
| iui->config = user_prim->u.config; |
| iui->config.supported_versions_mask &= 0x0003; /* We only support versions 1 and 2 ourselves */ |
| //TODO: if supported_versions_mask == 0x0000,no supported versions, send error to upper layers |
| |
| if (iui->config.transparent) |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_TrM_DATA_XFER_READY, 0, 0); |
| else { |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_INIT, 0, 0); |
| } |
| break; |
| } |
| } |
| |
| /* transparent mode data transfer */ |
| static void iuup_fsm_trm_data(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| //struct osmo_iuup_instance *iui = fi->priv; |
| |
| switch (event) { |
| case IUUP_FSM_EVT_IUUP_CONFIG_REQ: |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_NULL, 0, 0); |
| break; |
| case IUUP_FSM_EVT_IUUP_DATA_REQ: |
| /* Data coming down from RNL (user) towards TNL (transport) */ |
| break; |
| case IUUP_FSM_EVT_IUUP_DATA_IND: |
| /* Data coming up from TNL (transport) towards RNL (user) */ |
| break; |
| case IUUP_FSM_EVT_IUUP_UNITDATA_REQ: |
| case IUUP_FSM_EVT_IUUP_UNITDATA_IND: |
| case IUUP_FSM_EVT_SSASAR_UNITDATA_REQ: |
| case IUUP_FSM_EVT_SSASAR_UNITDATA_IND: |
| /* no state change */ |
| break; |
| } |
| } |
| |
| static void iuup_fsm_init_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| { |
| struct osmo_iuup_instance *iui = fi->priv; |
| |
| iui->type14_fn = 0; |
| if (iui->config.active) { |
| iui->timer.init.n = 0; |
| iui->timer.init.retrans_itp = tnp_ctrl_init_alloc(iui); |
| retransmit_initialization(iui); |
| } |
| } |
| |
| static void iuup_fsm_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| struct osmo_iuup_instance *iui = fi->priv; |
| struct osmo_iuup_rnl_prim *irp; |
| struct osmo_iuup_tnl_prim *itp; |
| |
| switch (event) { |
| case IUUP_FSM_EVT_IUUP_CONFIG_REQ: |
| /* the only permitted 'config req' type is the request to release the instance */ |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_NULL, 0, 0); |
| break; |
| case IUUP_FSM_EVT_INIT: |
| itp = data; |
| if (iuup_rx_initialization(iui, itp)) |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_SMpSDU_DATA_XFER_READY, 0, 0); |
| break; |
| case IUUP_FSM_EVT_LAST_INIT_ACK: |
| /* last INIT ACK was received, transition to DATA_XFER_READY state */ |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_SMpSDU_DATA_XFER_READY, 0, 0); |
| break; |
| case IUUP_FSM_EVT_INIT_NACK: |
| LOGPFSML(fi, LOGL_NOTICE, "Rx Initialization NACK N=%" PRIu32 "/%" PRIu32 "\n", |
| iui->timer.init.n, iui->config.t_init.n_max); |
| osmo_timer_del(&fi->timer); |
| if (iui->timer.init.n == iui->config.t_init.n_max) { |
| irp = irp_error_event_alloc_c(iui, IUUP_ERR_CAUSE_INIT_FAILURE_REP_NACK, IUUP_ERR_DIST_SECOND_FWD); |
| iui->user_prim_cb(&irp->oph, iui->user_prim_priv); |
| return; |
| } |
| iui->timer.init.n++; |
| retransmit_initialization(iui); |
| break; |
| default: |
| OSMO_ASSERT(false); |
| } |
| } |
| |
| /* 3GPP TS 25.415 B.2.3 "Support Mode Data Transfer Ready State" */ |
| static void iuup_fsm_smpsdu_data(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| struct osmo_iuup_instance *iui = fi->priv; |
| struct osmo_iuup_rnl_prim *irp = NULL; |
| struct osmo_iuup_tnl_prim *itp = NULL; |
| |
| switch (event) { |
| case IUUP_FSM_EVT_IUUP_CONFIG_REQ: |
| irp = data; |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_NULL, 0, 0); |
| break; |
| case IUUP_FSM_EVT_INIT: |
| /* "In case of handover or relocation, Initialisation procedures |
| * may have to be performed and Iu UP instance may have to enter |
| * the initialisation state." */ |
| itp = data; |
| if (!iuup_rx_initialization(iui, itp)) |
| osmo_fsm_inst_state_chg(fi, IUUP_FSM_ST_INIT, 0, 0); |
| break; |
| case IUUP_FSM_EVT_IUUP_DATA_REQ: |
| /* Data coming down from RNL (user) towards TNL (transport) */ |
| irp = data; |
| itp = rnl_to_tnl_data(iui, irp); |
| iui->transport_prim_cb(&itp->oph, iui->transport_prim_priv); |
| break; |
| case IUUP_FSM_EVT_IUUP_DATA_IND: |
| /* Data coming up from TNL (transport) towards RNL (user) */ |
| itp = data; |
| irp = tnl_to_rnl_data(itp); |
| iui->user_prim_cb(&irp->oph, iui->user_prim_priv); |
| break; |
| } |
| } |
| |
| static int iuup_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| { |
| struct osmo_iuup_instance *iui = fi->priv; |
| struct osmo_iuup_rnl_prim *irp; |
| |
| switch (fi->T) { |
| case IUUP_TIMER_INIT: |
| OSMO_ASSERT(fi->state == IUUP_FSM_ST_INIT); |
| if (iui->timer.init.n == iui->config.t_init.n_max) { |
| irp = irp_error_event_alloc_c(iui, IUUP_ERR_CAUSE_INIT_FAILURE_NET_TMR, IUUP_ERR_DIST_LOCAL); |
| iui->user_prim_cb(&irp->oph, iui->user_prim_priv); |
| return 0; |
| } |
| iui->timer.init.n++; |
| retransmit_initialization(iui); |
| break; |
| case IUUP_TIMER_TA: |
| break; |
| case IUUP_TIMER_RC: |
| break; |
| default: |
| OSMO_ASSERT(0); |
| } |
| return 0; |
| } |
| |
| |
| static const struct osmo_fsm_state iuup_fsm_states[] = { |
| [IUUP_FSM_ST_NULL] = { |
| .in_event_mask = S(IUUP_FSM_EVT_IUUP_CONFIG_REQ), |
| .out_state_mask = S(IUUP_FSM_ST_INIT) | |
| S(IUUP_FSM_ST_TrM_DATA_XFER_READY), |
| .name = "NULL", |
| .action = iuup_fsm_null, |
| }, |
| [IUUP_FSM_ST_TrM_DATA_XFER_READY] = { |
| .in_event_mask = S(IUUP_FSM_EVT_IUUP_CONFIG_REQ) | |
| S(IUUP_FSM_EVT_IUUP_STATUS_REQ) | |
| S(IUUP_FSM_EVT_IUUP_DATA_REQ) | |
| S(IUUP_FSM_EVT_IUUP_DATA_IND) | |
| S(IUUP_FSM_EVT_IUUP_UNITDATA_REQ) | |
| S(IUUP_FSM_EVT_IUUP_UNITDATA_IND) | |
| S(IUUP_FSM_EVT_SSASAR_UNITDATA_REQ) | |
| S(IUUP_FSM_EVT_SSASAR_UNITDATA_IND), |
| .out_state_mask = S(IUUP_FSM_ST_NULL), |
| .name = "TrM_Data_Transfer_Ready", |
| .action = iuup_fsm_trm_data, |
| }, |
| [IUUP_FSM_ST_INIT] = { |
| .in_event_mask = S(IUUP_FSM_EVT_IUUP_CONFIG_REQ) | |
| S(IUUP_FSM_EVT_INIT) | |
| S(IUUP_FSM_EVT_LAST_INIT_ACK) | |
| S(IUUP_FSM_EVT_INIT_NACK), |
| .out_state_mask = S(IUUP_FSM_ST_NULL) | |
| S(IUUP_FSM_ST_SMpSDU_DATA_XFER_READY), |
| .name = "Initialisation", |
| .onenter = iuup_fsm_init_on_enter, |
| .action = iuup_fsm_init, |
| }, |
| [IUUP_FSM_ST_SMpSDU_DATA_XFER_READY] = { |
| .in_event_mask = S(IUUP_FSM_EVT_IUUP_CONFIG_REQ) | |
| S(IUUP_FSM_EVT_INIT) | |
| S(IUUP_FSM_EVT_IUUP_DATA_REQ) | |
| S(IUUP_FSM_EVT_IUUP_DATA_IND), |
| .out_state_mask = S(IUUP_FSM_ST_NULL) | |
| S(IUUP_FSM_ST_INIT), |
| .name = "SMpSDU_Data_Transfer_Ready", |
| .action = iuup_fsm_smpsdu_data, |
| }, |
| }; |
| |
| static struct osmo_fsm iuup_fsm = { |
| .name = "IuUP", |
| .states = iuup_fsm_states, |
| .num_states = ARRAY_SIZE(iuup_fsm_states), |
| .timer_cb = iuup_fsm_timer_cb, |
| .log_subsys = DLIUUP, |
| .event_names = iuup_fsm_event_names, |
| }; |
| |
| static int iuup_verify_pdu(const uint8_t *data, unsigned int len) |
| { |
| int header_crc_computed, payload_crc_computed; |
| uint16_t payload_crc; |
| uint8_t pdu_type = iuup_get_pdu_type(data); |
| struct iuup_pdutype0_hdr *t0h; |
| struct iuup_pdutype14_hdr *t14h; |
| |
| if (len < 3) |
| return -EINVAL; |
| |
| header_crc_computed = osmo_iuup_compute_header_crc(data, len); |
| if (iuup_get_hdr_crc(data) != header_crc_computed) { |
| LOGP(DLIUUP, LOGL_NOTICE, "Header Checksum error: rx 0x%02x vs exp 0x%02x\n", |
| iuup_get_hdr_crc(data), header_crc_computed); |
| return -EIO; |
| } |
| switch (pdu_type) { |
| case IUUP_PDU_T_DATA_NOCRC: |
| if (len < 4) |
| return -EINVAL; |
| break; |
| case IUUP_PDU_T_DATA_CRC: |
| t0h = (struct iuup_pdutype0_hdr *) data; |
| payload_crc = ((uint16_t)t0h->payload_crc_hi << 8) | t0h->payload_crc_lo; |
| payload_crc_computed = osmo_iuup_compute_payload_crc(data, len); |
| if (payload_crc != payload_crc_computed) |
| goto payload_crc_err; |
| break; |
| case IUUP_PDU_T_CONTROL: |
| t14h = (struct iuup_pdutype14_hdr *) data; |
| if (t14h->ack_nack == IUUP_AN_PROCEDURE) { |
| payload_crc = ((uint16_t)t14h->payload_crc_hi << 8) | t14h->payload_crc_lo; |
| payload_crc_computed = osmo_iuup_compute_payload_crc(data, len); |
| if (payload_crc != payload_crc_computed) |
| goto payload_crc_err; |
| } |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| |
| payload_crc_err: |
| LOGP(DLIUUP, LOGL_NOTICE, "Payload Checksum error (pdu type %u): rx 0x%02x vs exp 0x%02x\n", |
| pdu_type, payload_crc, payload_crc_computed); |
| return -EIO; |
| } |
| |
| /* A IuUP TNL SAP primitive from transport (lower layer) */ |
| int osmo_iuup_tnl_prim_up(struct osmo_iuup_instance *inst, struct osmo_iuup_tnl_prim *itp) |
| { |
| struct osmo_prim_hdr *oph = &itp->oph; |
| struct iuup_pdutype14_hdr *t14h; |
| int rc = 0; |
| |
| OSMO_ASSERT(oph->sap == SAP_IUUP_TNL); |
| |
| switch (OSMO_PRIM_HDR(oph)) { |
| case OSMO_PRIM(OSMO_IUUP_TNL_UNITDATA, PRIM_OP_INDICATION): |
| if (iuup_verify_pdu(msgb_l2(oph->msg), msgb_l2len(oph->msg)) < 0) { |
| LOGPFSML(inst->fi, LOGL_NOTICE, "Discarding invalid IuUP PDU: %s\n", |
| osmo_hexdump((const unsigned char *) msgb_l2(oph->msg), msgb_l2len(oph->msg))); |
| /* don't return error as the caller is not responsible for the PDU which |
| * was transmitted from some remote peer */ |
| return 0; |
| } |
| switch (iuup_get_pdu_type(msgb_l2(oph->msg))) { |
| case IUUP_PDU_T_DATA_CRC: |
| oph->msg->l3h = msgb_l2(oph->msg) + sizeof(struct iuup_pdutype0_hdr); |
| rc = osmo_fsm_inst_dispatch(inst->fi, IUUP_FSM_EVT_IUUP_DATA_IND, itp); |
| break; |
| case IUUP_PDU_T_DATA_NOCRC: |
| oph->msg->l3h = msgb_l2(oph->msg) + sizeof(struct iuup_pdutype1_hdr); |
| rc = osmo_fsm_inst_dispatch(inst->fi, IUUP_FSM_EVT_IUUP_DATA_IND, itp); |
| break; |
| case IUUP_PDU_T_CONTROL: |
| t14h = (struct iuup_pdutype14_hdr *) msgb_l2(oph->msg); |
| switch (t14h->ack_nack) { |
| case IUUP_AN_PROCEDURE: |
| switch (t14h->proc_ind) { |
| case IUUP_PROC_INIT: |
| rc = osmo_fsm_inst_dispatch(inst->fi, IUUP_FSM_EVT_INIT, itp); |
| break; |
| case IUUP_PROC_RATE_CTRL: |
| case IUUP_PROC_TIME_ALIGN: |
| case IUUP_PROC_ERR_EVENT: |
| LOGPFSML(inst->fi, LOGL_NOTICE, "Received Request for " |
| "unsupported IuUP procedure %u\n", t14h->proc_ind); |
| break; |
| default: |
| LOGPFSML(inst->fi, LOGL_NOTICE, "Received Request for " |
| "unknown IuUP procedure %u\n", t14h->proc_ind); |
| break; |
| } |
| break; |
| case IUUP_AN_ACK: |
| switch (t14h->proc_ind) { |
| case IUUP_PROC_INIT: |
| rc = osmo_fsm_inst_dispatch(inst->fi, |
| IUUP_FSM_EVT_LAST_INIT_ACK, itp); |
| break; |
| default: |
| LOGPFSML(inst->fi, LOGL_ERROR, "Received ACK for " |
| "unknown IuUP procedure %u\n", t14h->proc_ind); |
| break; |
| } |
| break; |
| case IUUP_AN_NACK: |
| switch (t14h->proc_ind) { |
| case IUUP_PROC_INIT: |
| rc = osmo_fsm_inst_dispatch(inst->fi, |
| IUUP_FSM_EVT_INIT_NACK, itp); |
| break; |
| default: |
| LOGPFSML(inst->fi, LOGL_ERROR, "Received NACK for " |
| "unknown IuUP procedure %u\n", t14h->proc_ind); |
| break; |
| } |
| break; |
| default: |
| LOGPFSML(inst->fi, LOGL_ERROR, "Received unknown IuUP ACK/NACK\n"); |
| break; |
| } |
| break; |
| default: |
| LOGPFSML(inst->fi, LOGL_NOTICE, "Received unknown IuUP PDU type %u\n", |
| iuup_get_pdu_type(msgb_l2(oph->msg))); |
| break; |
| } |
| break; |
| default: |
| /* exception: return an error code due to a wrong primitive */ |
| return -EINVAL; |
| } |
| |
| return rc; |
| } |
| |
| /* A IuUP RNL SAP primitive from user (higher layer) */ |
| int osmo_iuup_rnl_prim_down(struct osmo_iuup_instance *inst, struct osmo_iuup_rnl_prim *irp) |
| { |
| struct osmo_prim_hdr *oph = &irp->oph; |
| int rc; |
| |
| OSMO_ASSERT(oph->sap == SAP_IUUP_RNL); |
| |
| switch (OSMO_PRIM_HDR(oph)) { |
| case OSMO_PRIM(OSMO_IUUP_RNL_CONFIG, PRIM_OP_REQUEST): |
| rc = osmo_fsm_inst_dispatch(inst->fi, IUUP_FSM_EVT_IUUP_CONFIG_REQ, irp); |
| msgb_free(irp->oph.msg); |
| break; |
| case OSMO_PRIM(OSMO_IUUP_RNL_DATA, PRIM_OP_REQUEST): |
| rc = osmo_fsm_inst_dispatch(inst->fi, IUUP_FSM_EVT_IUUP_DATA_REQ, irp); |
| if (rc != 0) |
| msgb_free(irp->oph.msg); |
| break; |
| case OSMO_PRIM(OSMO_IUUP_RNL_STATUS, PRIM_OP_REQUEST): |
| rc = osmo_fsm_inst_dispatch(inst->fi, IUUP_FSM_EVT_IUUP_STATUS_REQ, irp); |
| msgb_free(irp->oph.msg); |
| break; |
| default: |
| rc = -EINVAL; |
| msgb_free(irp->oph.msg); |
| } |
| return rc; |
| } |
| |
| struct osmo_iuup_instance *osmo_iuup_instance_alloc(void *ctx, const char *id) |
| { |
| struct osmo_iuup_instance *iui; |
| iui = talloc_zero(ctx, struct osmo_iuup_instance); |
| if (!iui) |
| return NULL; |
| |
| iui->fi = osmo_fsm_inst_alloc(&iuup_fsm, NULL, iui, LOGL_DEBUG, id); |
| if (!iui->fi) |
| goto free_ret; |
| |
| return iui; |
| free_ret: |
| talloc_free(iui); |
| return NULL; |
| } |
| |
| void osmo_iuup_instance_free(struct osmo_iuup_instance *iui) |
| { |
| if (!iui) |
| return; |
| |
| if (iui->fi) |
| osmo_fsm_inst_free(iui->fi); |
| iui->fi = NULL; |
| talloc_free(iui); |
| } |
| |
| void osmo_iuup_instance_set_user_prim_cb(struct osmo_iuup_instance *iui, osmo_prim_cb func, void *priv) |
| { |
| iui->user_prim_cb = func; |
| iui->user_prim_priv = priv; |
| } |
| void osmo_iuup_instance_set_transport_prim_cb(struct osmo_iuup_instance *iui, osmo_prim_cb func, void *priv) |
| { |
| iui->transport_prim_cb = func; |
| iui->transport_prim_priv = priv; |
| } |
| |
| static __attribute__((constructor)) void on_dso_load_iuup_fsm(void) |
| { |
| OSMO_ASSERT(osmo_fsm_register(&iuup_fsm) == 0); |
| } |