diff options
| -rw-r--r-- | include/osmocom/gprs/protocol/gsm_08_16.h | 9 | ||||
| -rw-r--r-- | src/gb/gprs_ns.c | 114 |
2 files changed, 122 insertions, 1 deletions
diff --git a/include/osmocom/gprs/protocol/gsm_08_16.h b/include/osmocom/gprs/protocol/gsm_08_16.h index fc743366..15d92d37 100644 --- a/include/osmocom/gprs/protocol/gsm_08_16.h +++ b/include/osmocom/gprs/protocol/gsm_08_16.h @@ -17,6 +17,15 @@ struct gprs_ns_hdr { uint8_t data[0]; /*!< variable-length payload */ } __attribute__((packed)); + +/*! Section 10.3.2c List of IP4 Elements */ +struct gprs_ns_ie_ip4_elem { + uint32_t ip_addr; + uint16_t udp_port; + uint8_t sig_weight; + uint8_t data_weight; +} __attribute__ ((packed)); + extern const struct value_string gprs_ns_pdu_strings[]; /*! NS PDU Type (TS 08.16, Section 10.3.7, Table 14) */ diff --git a/src/gb/gprs_ns.c b/src/gb/gprs_ns.c index 1281c9f4..4704ed60 100644 --- a/src/gb/gprs_ns.c +++ b/src/gb/gprs_ns.c @@ -2,7 +2,7 @@ * GPRS Networks Service (NS) messages on the Gb interface. * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05). */ /* - * (C) 2009-2017 by Harald Welte <laforge@gnumonks.org> + * (C) 2009-2018 by Harald Welte <laforge@gnumonks.org> * (C) 2016-2017 sysmocom - s.f.m.c. GmbH * * All Rights Reserved @@ -715,6 +715,118 @@ static int gprs_ns_tx_reset_ack(struct gprs_nsvc *nsvc) return gprs_ns_tx(nsvc, msg); } +/* Section 9.3.4 */ +static int gprs_ns_tx_sns_config(struct gprs_nsvc *nsvc, bool end_flag, + const struct gprs_ns_ie_ip4_elem *ip4_elems, + unsigned int num_ip4_elems) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsei; + + log_set_context(LOG_CTX_GB_NSVC, nsvc); + if (!msg) + return -ENOMEM; + + nsei = osmo_htons(nsvc->nsei); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + + nsh->pdu_type = SNS_PDUT_CONFIG; + + msgb_v_put(msg, end_flag ? 0x01 : 0x00); + msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *)&nsei); + + /* List of IP4 Elements 10.3.2c */ + msgb_tvlv_put(msg, NS_IE_IPv4_LIST, num_ip4_elems*sizeof(struct gprs_ns_ie_ip4_elem), + (const uint8_t *)ip4_elems); + /* FIXME: List of IP6 elements 10.3.2d */ + + return gprs_ns_tx(nsvc, msg); +} + +/* Section 9.3.5 */ +static int gprs_ns_tx_sns_config_ack(struct gprs_nsvc *nsvc, uint8_t *cause) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsei; + + log_set_context(LOG_CTX_GB_NSVC, nsvc); + if (!msg) + return -ENOMEM; + + nsei = osmo_htons(nsvc->nsei); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + + nsh->pdu_type = SNS_PDUT_CONFIG_ACK; + + msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *)&nsei); + if (cause) + msgb_tvlv_put(msg, NS_IE_CAUSE, 1, cause); + + return gprs_ns_tx(nsvc, msg); +} + + +/* Section 9.3.7 */ +static int gprs_ns_tx_sns_size(struct gprs_nsvc *nsvc, bool reset_flag, uint16_t max_nr_nsvc, + uint16_t *ip4_ep_nr, uint16_t *ip6_ep_nr) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsei; + + log_set_context(LOG_CTX_GB_NSVC, nsvc); + if (!msg) + return -ENOMEM; + + nsei = osmo_htons(nsvc->nsei); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + + nsh->pdu_type = SNS_PDUT_SIZE; + + msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *)&nsei); + msgb_tv_put(msg, NS_IE_RESET_FLAG, reset_flag ? 0x01 : 0x00); + msgb_tv16_put(msg, NS_IE_MAX_NR_NSVC, max_nr_nsvc); + if (ip4_ep_nr) + msgb_tv16_put(msg, NS_IE_IPv4_EP_NR, *ip4_ep_nr); + if (ip6_ep_nr) + msgb_tv16_put(msg, NS_IE_IPv6_EP_NR, *ip6_ep_nr); + + return gprs_ns_tx(nsvc, msg); +} + +/* Section 9.3.8 */ +static int gprs_ns_tx_sns_size_ack(struct gprs_nsvc *nsvc, uint8_t *cause) +{ + struct msgb *msg = gprs_ns_msgb_alloc(); + struct gprs_ns_hdr *nsh; + uint16_t nsei; + + log_set_context(LOG_CTX_GB_NSVC, nsvc); + if (!msg) + return -ENOMEM; + + nsei = osmo_htons(nsvc->nsei); + + msg->l2h = msgb_put(msg, sizeof(*nsh)); + nsh = (struct gprs_ns_hdr *) msg->l2h; + + nsh->pdu_type = SNS_PDUT_SIZE_ACK; + + msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *)&nsei); + if (cause) + msgb_tvlv_put(msg, NS_IE_CAUSE, 1, cause); + + return gprs_ns_tx(nsvc, msg); +} + /*! High-level function for transmitting a NS-UNITDATA messsage * \param[in] nsi NS-instance on which we shall transmit * \param[in] msg struct msgb to be trasnmitted |