* introduce TLV parser definitions for RSL IE's
* introduce functions for ip.access specific RSL commands
diff --git a/src/abis_rsl.c b/src/abis_rsl.c
index 53d6386..90d4360 100644
--- a/src/abis_rsl.c
+++ b/src/abis_rsl.c
@@ -25,6 +25,7 @@
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
+#include <netinet/in.h>
#include <openbsc/gsm_data.h>
#include <openbsc/gsm_04_08.h>
@@ -39,6 +40,78 @@
#define MAX(a, b) (a) >= (b) ? (a) : (b)
+static const struct tlv_definition rsl_att_tlvdef = {
+ .def = {
+ [RSL_IE_CHAN_NR] = { TLV_TYPE_TV },
+ [RSL_IE_LINK_IDENT] = { TLV_TYPE_TV },
+ [RSL_IE_ACT_TYPE] = { TLV_TYPE_TV },
+ [RSL_IE_BS_POWER] = { TLV_TYPE_TV },
+ [RSL_IE_CHAN_IDENT] = { TLV_TYPE_TLV },
+ [RSL_IE_CHAN_MODE] = { TLV_TYPE_TLV },
+ [RSL_IE_ENCR_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_FRAME_NUMBER] = { TLV_TYPE_FIXED, 2 },
+ [RSL_IE_HANDO_REF] = { TLV_TYPE_TV },
+ [RSL_IE_L1_INFO] = { TLV_TYPE_FIXED, 2 },
+ [RSL_IE_L3_INFO] = { TLV_TYPE_TL16V },
+ [RSL_IE_MS_IDENTITY] = { TLV_TYPE_TLV },
+ [RSL_IE_MS_POWER] = { TLV_TYPE_TV },
+ [RSL_IE_PAGING_GROUP] = { TLV_TYPE_TV },
+ [RSL_IE_PAGING_LOAD] = { TLV_TYPE_FIXED, 2 },
+ [RSL_IE_PYHS_CONTEXT] = { TLV_TYPE_TLV },
+ [RSL_IE_ACCESS_DELAY] = { TLV_TYPE_TV },
+ [RSL_IE_RACH_LOAD] = { TLV_TYPE_TLV },
+ [RSL_IE_REQ_REFERENCE] = { TLV_TYPE_FIXED, 3 },
+ [RSL_IE_RELEASE_MODE] = { TLV_TYPE_TV },
+ [RSL_IE_RESOURCE_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_RLM_CAUSE] = { TLV_TYPE_TLV },
+ [RSL_IE_STARTNG_TIME] = { TLV_TYPE_FIXED, 2 },
+ [RSL_IE_TIMING_ADVANCE] = { TLV_TYPE_TV },
+ [RSL_IE_UPLINK_MEAS] = { TLV_TYPE_TLV },
+ [RSL_IE_CAUSE] = { TLV_TYPE_TLV },
+ [RSL_IE_MEAS_RES_NR] = { TLV_TYPE_TV },
+ [RSL_IE_MSG_ID] = { TLV_TYPE_TV },
+ [RSL_IE_SYSINFO_TYPE] = { TLV_TYPE_TV },
+ [RSL_IE_MS_POWER_PARAM] = { TLV_TYPE_TLV },
+ [RSL_IE_BS_POWER_PARAM] = { TLV_TYPE_TLV },
+ [RSL_IE_PREPROC_PARAM] = { TLV_TYPE_TLV },
+ [RSL_IE_PREPROC_MEAS] = { TLV_TYPE_TLV },
+ [RSL_IE_IMM_ASS_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_SMSCB_INFO] = { TLV_TYPE_FIXED, 23 },
+ [RSL_IE_MS_TIMING_OFFSET] = { TLV_TYPE_TV },
+ [RSL_IE_ERR_MSG] = { TLV_TYPE_TLV },
+ [RSL_IE_FULL_BCCH_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_CHAN_NEEDED] = { TLV_TYPE_TV },
+ [RSL_IE_CB_CMD_TYPE] = { TLV_TYPE_TV },
+ [RSL_IE_SMSCB_MSG] = { TLV_TYPE_TLV },
+ [RSL_IE_FULL_IMM_ASS_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_SACCH_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_CBCH_LOAD_INFO] = { TLV_TYPE_TV },
+ [RSL_IE_SMSCB_CHAN_INDICATOR] = { TLV_TYPE_TV },
+ [RSL_IE_GROUP_CALL_REF] = { TLV_TYPE_TLV },
+ [RSL_IE_CHAN_DESC] = { TLV_TYPE_TLV },
+ [RSL_IE_NCH_DRX_INFO] = { TLV_TYPE_TLV },
+ [RSL_IE_CMD_INDICATOR] = { TLV_TYPE_TLV },
+ [RSL_IE_EMLPP_PRIO] = { TLV_TYPE_TV },
+ [RSL_IE_UIC] = { TLV_TYPE_TLV },
+ [RSL_IE_MAIN_CHAN_REF] = { TLV_TYPE_TV },
+ [RSL_IE_MR_CONFIG] = { TLV_TYPE_TLV },
+ [RSL_IE_MR_CONTROL] = { TLV_TYPE_TV },
+ [RSL_IE_SUP_CODEC_TYPES] = { TLV_TYPE_TLV },
+ [RSL_IE_CODEC_CONFIG] = { TLV_TYPE_TLV },
+ [RSL_IE_RTD] = { TLV_TYPE_TV },
+ [RSL_IE_TFO_STATUS] = { TLV_TYPE_TV },
+ [RSL_IE_LLP_APDU] = { TLV_TYPE_TLV },
+ [RSL_IE_IPAC_REMOTE_IP] = { TLV_TYPE_FIXED, 4 },
+ [RSL_IE_IPAC_REMOTE_PORT] = { TLV_TYPE_FIXED, 2 },
+ [RSL_IE_IPAC_LOCAL_IP] = { TLV_TYPE_FIXED, 4 },
+ [RSL_IE_IPAC_LOCAL_PORT] = { TLV_TYPE_FIXED, 2 },
+ [0xf4] = { TLV_TYPE_TV },
+ [0xf8] = { TLV_TYPE_FIXED, 2 },
+ [0xfc] = { TLV_TYPE_TV },
+ },
+};
+#define rsl_tlv_parse(dec, buf, len) tlv_parse(dec, &rsl_att_tlvdef, buf, len)
+
static u_int8_t mdisc_by_msgtype(u_int8_t msg_type)
{
/* mask off the transparent bit ? */
@@ -793,6 +866,145 @@
return rc;
}
+/* ip.access specific RSL extensions */
+int rsl_ipacc_bind(struct gsm_lchan *lchan)
+{
+ struct msgb *msg = rsl_msgb_alloc();
+ struct abis_rsl_dchan_hdr *dh;
+
+ dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
+ init_dchan_hdr(dh, RSL_MT_IPAC_BIND);
+ dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS;
+ dh->chan_nr = lchan2chan_nr(lchan);
+
+ msg->trx = lchan->ts->trx;
+
+ return abis_rsl_sendmsg(msg);
+}
+
+int rsl_ipacc_connect(struct gsm_lchan *lchan, u_int32_t ip, u_int16_t port, u_int16_t f8, u_int8_t fc)
+{
+ struct msgb *msg = rsl_msgb_alloc();
+ struct abis_rsl_dchan_hdr *dh;
+ u_int8_t *att_f8, *att_ip, *att_port;
+
+ dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
+ init_dchan_hdr(dh, RSL_MT_IPAC_CONNECT);
+ dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS;
+ dh->chan_nr = lchan2chan_nr(lchan);
+
+ att_f8 = msgb_put(msg, sizeof(f8)+1);
+ att_f8[0] = 0xf8;
+ att_f8[1] = f8 >> 8;
+ att_f8[2] = f8 & 0xff;
+
+ att_ip = msgb_put(msg, sizeof(ip)+1);
+ att_ip[0] = RSL_IE_IPAC_REMOTE_IP;
+ att_ip[1] = ip >> 24;
+ att_ip[2] = ip >> 16;
+ att_ip[3] = ip >> 8;
+ att_ip[4] = ip & 0xff;
+
+ att_port = msgb_put(msg, sizeof(port)+1);
+ att_port[0] = RSL_IE_IPAC_REMOTE_PORT;
+ att_port[1] = port >> 8;
+ att_port[2] = port & 0xff;
+
+ msgb_tv_put(msg, 0xf4, 1); /* F4 01 */
+ msgb_tv_put(msg, 0xfc, fc); /* FC 7F */
+ msg->trx = lchan->ts->trx;
+
+ return abis_rsl_sendmsg(msg);
+}
+
+static int abis_rsl_rx_ipacc_bindack(struct msgb *msg)
+{
+ struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
+ struct tlv_parsed tv;
+ struct gsm_bts_trx_ts *ts = msg->lchan->ts;
+ u_int32_t ip;
+ u_int16_t port, attr_f8;
+
+ /* the BTS has acknowledged a local bind, it now tells us the IP
+ * address and port number to which it has bound the given logical
+ * channel */
+
+ rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh));
+ if (!TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_PORT) ||
+ !TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_IP) ||
+ !TLVP_PRESENT(&tv, 0xfc) ||
+ !TLVP_PRESENT(&tv, 0xf8)) {
+ DEBUGP(DRSL, "mandatory IE missing\n");
+ return -EINVAL;
+ }
+ ip = *((u_int32_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_IP));
+ port = *((u_int16_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_PORT));
+ attr_f8 = *((u_int16_t *) TLVP_VAL(&tv, 0xf8));
+
+ /* update our local information about this TS */
+ ts->abis_ip.bound_ip = ntohl(ip);
+ ts->abis_ip.bound_port = ntohl(port);
+ ts->abis_ip.attr_f8 = ntohs(attr_f8);
+ ts->abis_ip.attr_fc = *TLVP_VAL(&tv, 0xfc);
+
+ return 0;
+}
+
+static int abis_rsl_rx_ipacc_disc_ind(struct msgb *msg)
+{
+ struct abis_rsl_dchan_hdr *dh = msgb_l2(msg);
+ struct tlv_parsed tv;
+
+ rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh));
+ if (!TLVP_PRESENT(&tv, RSL_IE_CAUSE)) {
+ DEBUGP(DRSL, "mandatory IE missing\n");
+ return -EINVAL;
+ }
+
+ DEBUGP(DNM, "cause=0x%02x\n", *TLVP_VAL(&tv, RSL_IE_CAUSE));
+
+ return 0;
+}
+
+static int abis_rsl_rx_ipacc(struct msgb *msg)
+{
+ struct abis_rsl_rll_hdr *rllh = msgb_l2(msg);
+ int rc = 0;
+
+ msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr);
+
+ switch (rllh->c.msg_type) {
+ case RSL_MT_IPAC_BIND_ACK:
+ DEBUGP(DRSL, "IPAC_BIND_ACK\n");
+ rc = abis_rsl_rx_ipacc_bindack(msg);
+ break;
+ case RSL_MT_IPAC_BIND_NACK:
+ /* somehow the BTS was unable to bind the lchan to its local
+ * port?!? */
+ DEBUGP(DRSL, "IPAC_BIND_NACK\n");
+ break;
+ case RSL_MT_IPAC_CONNECT_ACK:
+ /* the BTS tells us that a connect operation was successful */
+ DEBUGP(DRSL, "IPAC_CONNECT_ACK\n");
+ break;
+ case RSL_MT_IPAC_CONNECT_NACK:
+ /* somehow the BTS was unable to connect the lchan to a remote
+ * port */
+ DEBUGP(DRSL, "IPAC_BIND_NACK\n");
+ break;
+ case RSL_MT_IPAC_DISCONNECT_IND:
+ DEBUGP(DRSL, "IPAC_DISCONNECT_IND\n");
+ rc = abis_rsl_rx_ipacc_disc_ind(msg);
+ break;
+ default:
+ DEBUGP(DRSL, "Unknown ip.access msg_type 0x%02x\n", rllh->c.msg_type);
+ break;
+ }
+
+ return rc;
+}
+
+
/* Entry-point where L2 RSL from BTS enters */
int abis_rsl_rcvmsg(struct msgb *msg)
{
@@ -816,6 +1028,9 @@
fprintf(stderr, "unimplemented RSL msg disc 0x%02x\n",
rslh->msg_discr);
break;
+ case ABIS_RSL_MDISC_IPACCESS:
+ rc = abis_rsl_rx_ipacc(msg);
+ break;
default:
fprintf(stderr, "unknown RSL message discriminator 0x%02x\n",
rslh->msg_discr);