[gprs] Build the SGSN stand-alone and not as part of bsc_hack
Instead of continuing to add more and more functionality to the bsc_hack binary, we should have the new SGSN code run as a separate executable. After this commit we now build a 'osmo_sgsn' executable, using its own osmo_sgsn.cfg config file. However, the SGSN is not yet functional, mainly due to the fact that the BSSGP and GMM code are written with the assumption that there is a msgb->trx->bts and the according 'sturct gsm_bts' data model around - which clearly is no longer the case outside of bsc_hack.
This commit is contained in:
parent
a67cbd6f06
commit
288be16587
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@ -0,0 +1,30 @@
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#ifndef _SGSN_H
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#define _SGSN_H
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#include <sys/types.h>
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#include <osmocore/msgb.h>
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#include <openbsc/gprs_ns.h>
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struct sgsn_config {
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/* parsed from config file */
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u_int32_t nsip_listen_ip;
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u_int16_t nsip_listen_port;
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/* misc */
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struct gprs_ns_inst *nsi;
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};
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/* sgsn_vty.c */
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int sgsn_vty_init(void);
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int sgsn_parse_config(const char *config_file, struct sgsn_config *cfg);
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/* sgsn.c */
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/* Main input function for Gb proxy */
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int sgsn_rcvmsg(struct msgb *msg, struct gprs_nsvc *nsvc, uint16_t ns_bvci);
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#endif
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@ -3,7 +3,7 @@ AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS)
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AM_LDFLAGS = $(LIBOSMOCORE_LIBS)
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sbin_PROGRAMS = bsc_hack bs11_config ipaccess-find ipaccess-config \
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isdnsync bsc_mgcp ipaccess-proxy osmo-gb_proxy
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isdnsync bsc_mgcp ipaccess-proxy osmo-gbproxy osmo-sgsn
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noinst_LIBRARIES = libbsc.a libmsc.a libvty.a libsccp.a libsgsn.a
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noinst_HEADERS = vty/cardshell.h
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@ -33,7 +33,7 @@ libvty_a_SOURCES = vty/buffer.c vty/command.c vty/vector.c vty/vty.c \
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libsccp_a_SOURCES = sccp/sccp.c
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bsc_hack_SOURCES = bsc_hack.c bsc_init.c vty_interface.c vty_interface_layer3.c
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bsc_hack_LDADD = libmsc.a libbsc.a libmsc.a libsgsn.a libvty.a -ldl -ldbi $(LIBCRYPT)
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bsc_hack_LDADD = libmsc.a libbsc.a libmsc.a libvty.a -ldl -ldbi $(LIBCRYPT)
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bs11_config_SOURCES = bs11_config.c abis_nm.c gsm_data.c debug.c \
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rs232.c bts_siemens_bs11.c
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@ -51,6 +51,10 @@ bsc_mgcp_LDADD = libvty.a
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ipaccess_proxy_SOURCES = ipaccess/ipaccess-proxy.c debug.c
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osmo_gb_proxy_SOURCES = gb_proxy.c gb_proxy_main.c gb_proxy_vty.c \
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osmo_gbproxy_SOURCES = gb_proxy.c gb_proxy_main.c gb_proxy_vty.c \
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gprs_ns.c socket.c debug.c
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osmo_gb_proxy_LDADD = libvty.a
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osmo_gbproxy_LDADD = libvty.a
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osmo_sgsn_SOURCES = sgsn_main.c sgsn_vty.c \
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socket.c debug.c
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osmo_sgsn_LDADD = libvty.a libsgsn.a
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@ -64,7 +64,7 @@ const char *openbsc_copyright =
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"This is free software: you are free to change and redistribute it.\n"
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"There is NO WARRANTY, to the extent permitted by law.\n";
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static char *config_file = "gb_proxy.cfg";
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static char *config_file = "osmo_gbproxy.cfg";
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static struct gbproxy_config gbcfg;
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/* Pointer to the SGSN peer */
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@ -138,6 +138,25 @@ int bssgp_tx_status(u_int8_t cause, u_int16_t *bvci, struct msgb *orig_msg)
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/* Chapter 8.4 BVC-Reset Procedure */
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static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp,
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uint16_t ns_bvci)
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{
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uint8_t bvci;
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int rc;
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bvci = ntohs(*(u_int16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
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DEBUGPC(DGPRS, "BVCI=%u, cause=%s\n", bvci,
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bssgp_cause_str(*TLVP_VAL(tp, BSSGP_IE_CAUSE)));
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/* When we receive a BVC-RESET PDU (at least of a PTP BVCI), the BSS
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* informs us about its RAC + Cell ID, so we can create a mapping */
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rc = bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK,
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msgb_nsei(msg), bvci, ns_bvci);
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return 0;
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}
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/* Uplink unit-data */
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static int bssgp_rx_ul_ud(struct msgb *msg, u_int16_t bvci)
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{
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@ -157,10 +176,12 @@ static int bssgp_rx_ul_ud(struct msgb *msg, u_int16_t bvci)
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!TLVP_PRESENT(&tp, BSSGP_IE_LLC_PDU))
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return -EIO;
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#if 0 //FIXME
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/* Determine the BTS based on the Cell ID */
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bts = gsm48_bts_by_ra_id(bsc_gsmnet,
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TLVP_VAL(&tp, BSSGP_IE_CELL_ID),
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TLVP_LEN(&tp, BSSGP_IE_CELL_ID));
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#endif
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if (bts)
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msg->trx = bts->c0;
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@ -229,6 +250,7 @@ static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp,
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return bssgp_tx_fc_bvc_ack(msgb_nsei(msg), *TLVP_VAL(tp, BSSGP_IE_TAG),
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ns_bvci);
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}
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/* We expect msg->l3h to point to the BSSGP header */
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int gprs_bssgp_rcvmsg(struct msgb *msg, u_int16_t ns_bvci)
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{
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@ -311,11 +333,7 @@ int gprs_bssgp_rcvmsg(struct msgb *msg, u_int16_t ns_bvci)
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if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI) ||
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!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE))
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goto err_mand_ie;
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bvci = ntohs(*(u_int16_t *)TLVP_VAL(&tp, BSSGP_IE_BVCI));
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DEBUGPC(DGPRS, "BVCI=%u, cause=%s\n", bvci,
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bssgp_cause_str(*TLVP_VAL(&tp, BSSGP_IE_CAUSE)));
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rc = bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK,
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msgb_nsei(msg), bvci, ns_bvci);
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rc = bssgp_rx_bvc_reset(msg, &tp, ns_bvci);
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break;
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case BSSGP_PDUT_STATUS:
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/* Some exception has occurred */
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@ -94,35 +94,3 @@ struct sgsn_mm_ctx *sgsn_mm_ctx_alloc(u_int32_t tlli,
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return ctx;
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}
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/* call-back function for the NS protocol */
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static int gprs_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
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struct msgb *msg, u_int16_t bvci)
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{
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int rc = 0;
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switch (event) {
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case GPRS_NS_EVT_UNIT_DATA:
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/* hand the message into the BSSGP implementation */
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rc = gprs_bssgp_rcvmsg(msg, bvci);
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break;
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default:
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LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
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if (msg)
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talloc_free(msg);
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rc = -EIO;
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break;
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}
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return rc;
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}
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int sgsn_init(void)
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{
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struct gprs_ns_inst *nsi;
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nsi = gprs_ns_instantiate(&gprs_ns_cb);
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if (!nsi)
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return -EIO;
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return nsip_listen(nsi, 23000);
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}
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@ -153,7 +153,7 @@ static int gsm48_tx_gmm_att_ack(struct msgb *old_msg)
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aa->att_result = 1; /* GPRS only */
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aa->ra_upd_timer = GPRS_TMR_MINUTE | 10;
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aa->radio_prio = 4; /* lowest */
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gsm48_ra_id_by_bts(aa->ra_id.digits, old_msg->trx->bts);
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//FIXME gsm48_ra_id_by_bts(aa->ra_id.digits, old_msg->trx->bts);
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/* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */
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return gsm48_gmm_sendmsg(msg, 0);
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@ -227,7 +227,7 @@ static int gsm48_rx_gmm_id_resp(struct msgb *msg)
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DEBUGP(DMM, "GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ",
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mi_type, mi_string);
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gprs_ra_id_by_bts(&ra_id, msg->trx->bts);
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//FIXME gprs_ra_id_by_bts(&ra_id, msg->trx->bts);
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ctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id);
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if (!ctx) {
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DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg));
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@ -289,7 +289,7 @@ static int gsm48_rx_gmm_att_req(struct msgb *msg)
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* with a foreign TLLI (P-TMSI that was allocated to the MS before),
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* or with random TLLI. */
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gprs_ra_id_by_bts(&ra_id, msg->trx->bts);
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//FIXME gprs_ra_id_by_bts(&ra_id, msg->trx->bts);
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/* MS network capability 10.5.5.12 */
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msnc_len = *cur++;
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@ -391,7 +391,7 @@ static int gsm48_tx_gmm_ra_upd_ack(struct msgb *old_msg)
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rua->force_stby = 0; /* not indicated */
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rua->upd_result = 0; /* RA updated */
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rua->ra_upd_timer = GPRS_TMR_MINUTE | 10;
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gsm48_ra_id_by_bts(rua->ra_id.digits, old_msg->trx->bts);
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//FIXME gsm48_ra_id_by_bts(rua->ra_id.digits, old_msg->trx->bts);
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/* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */
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return gsm48_gmm_sendmsg(msg, 0);
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@ -0,0 +1,13 @@
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!
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! OpenBSC configuration saved from vty
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! !
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!
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line vty
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no login
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!
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gbproxy
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nsip bss local port 23000
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nsip sgsn remote ip 192.168.100.239
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nsip sgsn remote port 23000
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nsip sgsn nsei 1
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nsip sgsn nsvci 11
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@ -0,0 +1,9 @@
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!
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! OpenBSC configuration saved from vty
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! !
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!
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line vty
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no login
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!
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sgsn
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nsip local port 23000
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@ -0,0 +1,141 @@
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/* GPRS SGSN Implementation */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2010 by On Waves
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <errno.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <osmocore/talloc.h>
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#include <osmocore/select.h>
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#include <openbsc/signal.h>
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#include <openbsc/debug.h>
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#include <openbsc/telnet_interface.h>
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#include <openbsc/vty.h>
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#include <openbsc/sgsn.h>
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#include <openbsc/gprs_ns.h>
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#include <openbsc/gprs_bssgp.h>
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#include "../bscconfig.h"
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/* this is here for the vty... it will never be called */
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void subscr_put() { abort(); }
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#define _GNU_SOURCE
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#include <getopt.h>
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void *tall_bsc_ctx;
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struct gprs_ns_inst *sgsn_nsi;
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const char *openbsc_version = "Osmocom NSIP Proxy " PACKAGE_VERSION;
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const char *openbsc_copyright =
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"Copyright (C) 2010 Harald Welte and On-Waves\n"
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"Contributions by Daniel Willmann, Jan Lübbe, Stefan Schmidt\n"
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"Dieter Spaar, Andreas Eversberg, Holger Freyther\n\n"
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"License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n"
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"This is free software: you are free to change and redistribute it.\n"
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"There is NO WARRANTY, to the extent permitted by law.\n";
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static char *config_file = "osmo_sgsn.cfg";
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static struct sgsn_config sgcfg;
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/* call-back function for the NS protocol */
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static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
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struct msgb *msg, u_int16_t bvci)
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{
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int rc = 0;
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switch (event) {
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case GPRS_NS_EVT_UNIT_DATA:
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/* hand the message into the BSSGP implementation */
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rc = gprs_bssgp_rcvmsg(msg, bvci);
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break;
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default:
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LOGP(DGPRS, LOGL_ERROR, "SGSN: Unknown event %u from NS\n", event);
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if (msg)
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talloc_free(msg);
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rc = -EIO;
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break;
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}
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return rc;
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}
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int main(int argc, char **argv)
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{
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struct gsm_network dummy_network;
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struct log_target *stderr_target;
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struct sockaddr_in sin;
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int rc;
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tall_bsc_ctx = talloc_named_const(NULL, 0, "osmo_sgsn");
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log_init(&log_info);
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stderr_target = log_target_create_stderr();
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log_add_target(stderr_target);
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log_set_all_filter(stderr_target, 1);
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telnet_init(&dummy_network, 4245);
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rc = sgsn_parse_config(config_file, &sgcfg);
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if (rc < 0) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot parse config file\n");
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exit(2);
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}
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sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb);
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if (!sgsn_nsi) {
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LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
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exit(1);
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}
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sgcfg.nsi = sgsn_nsi;
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nsip_listen(sgsn_nsi, sgcfg.nsip_listen_port);
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while (1) {
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rc = bsc_select_main(0);
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if (rc < 0)
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exit(3);
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}
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exit(0);
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}
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struct gsm_network;
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int bsc_vty_init(struct gsm_network *dummy)
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{
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cmd_init(1);
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vty_init();
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openbsc_vty_add_cmds();
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sgsn_vty_init();
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return 0;
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}
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@ -0,0 +1,146 @@
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/*
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* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2010 by On-Waves
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* All Rights Reserved
|
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*
|
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* 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.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <osmocore/talloc.h>
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#include <openbsc/debug.h>
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#include <openbsc/sgsn.h>
|
||||
#include <openbsc/gprs_ns.h>
|
||||
|
||||
#include <vty/command.h>
|
||||
#include <vty/vty.h>
|
||||
|
||||
static struct sgsn_config *g_cfg = NULL;
|
||||
|
||||
static struct cmd_node sgsn_node = {
|
||||
SGSN_NODE,
|
||||
"%s(sgsn)#",
|
||||
1,
|
||||
};
|
||||
|
||||
static int config_write_sgsn(struct vty *vty)
|
||||
{
|
||||
struct in_addr ia;
|
||||
|
||||
vty_out(vty, "sgsn%s", VTY_NEWLINE);
|
||||
|
||||
if (g_cfg->nsip_listen_ip) {
|
||||
ia.s_addr = htonl(g_cfg->nsip_listen_ip);
|
||||
vty_out(vty, " nsip local ip %s%s", inet_ntoa(ia),
|
||||
VTY_NEWLINE);
|
||||
}
|
||||
vty_out(vty, " nsip local port %u%s", g_cfg->nsip_listen_port,
|
||||
VTY_NEWLINE);
|
||||
|
||||
return CMD_SUCCESS;
|
||||
}
|
||||
|
||||
DEFUN(show_sgsn, show_sgsn_cmd, "show sgsn",
|
||||
SHOW_STR "Display information about the SGSN")
|
||||
{
|
||||
/* FIXME: iterate over list of NS-VC's and display their state */
|
||||
struct gprs_ns_inst *nsi = g_cfg->nsi;
|
||||
struct gprs_nsvc *nsvc;
|
||||
|
||||
llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
|
||||
vty_out(vty, "NSEI %5u, NS-VC %5u, %s-mode, %s %s%s",
|
||||
nsvc->nsei, nsvc->nsvci,
|
||||
nsvc->remote_end_is_sgsn ? "BSS" : "SGSN",
|
||||
nsvc->state & NSE_S_ALIVE ? "ALIVE" : "DEAD",
|
||||
nsvc->state & NSE_S_BLOCKED ? "BLOCKED" : "UNBLOCKED",
|
||||
VTY_NEWLINE);
|
||||
if (nsvc->nsi->ll == GPRS_NS_LL_UDP)
|
||||
vty_out(vty, " remote peer %s:%u%s",
|
||||
inet_ntoa(nsvc->ip.bts_addr.sin_addr),
|
||||
ntohs(nsvc->ip.bts_addr.sin_port), VTY_NEWLINE);
|
||||
}
|
||||
|
||||
return CMD_SUCCESS;
|
||||
}
|
||||
|
||||
DEFUN(cfg_sgsn,
|
||||
cfg_sgsn_cmd,
|
||||
"sgsn",
|
||||
"Configure the SGSN")
|
||||
{
|
||||
vty->node = SGSN_NODE;
|
||||
return CMD_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
DEFUN(cfg_nsip_local_ip,
|
||||
cfg_nsip_local_ip_cmd,
|
||||
"nsip local ip A.B.C.D",
|
||||
"Set the IP address on which we listen for BSS connects")
|
||||
{
|
||||
struct in_addr ia;
|
||||
|
||||
inet_aton(argv[0], &ia);
|
||||
g_cfg->nsip_listen_ip = ntohl(ia.s_addr);
|
||||
|
||||
return CMD_SUCCESS;
|
||||
}
|
||||
|
||||
DEFUN(cfg_nsip_local_port,
|
||||
cfg_nsip_local_port_cmd,
|
||||
"nsip local port <0-65534>",
|
||||
"Set the UDP port on which we listen for BSS connects")
|
||||
{
|
||||
unsigned int port = atoi(argv[0]);
|
||||
|
||||
g_cfg->nsip_listen_port = port;
|
||||
return CMD_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
int sgsn_vty_init(void)
|
||||
{
|
||||
install_element(VIEW_NODE, &show_sgsn_cmd);
|
||||
|
||||
install_element(CONFIG_NODE, &cfg_sgsn_cmd);
|
||||
install_node(&sgsn_node, config_write_sgsn);
|
||||
install_default(SGSN_NODE);
|
||||
install_element(SGSN_NODE, &cfg_nsip_local_ip_cmd);
|
||||
install_element(SGSN_NODE, &cfg_nsip_local_port_cmd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int sgsn_parse_config(const char *config_file, struct sgsn_config *cfg)
|
||||
{
|
||||
int rc;
|
||||
|
||||
g_cfg = cfg;
|
||||
rc = vty_read_config_file(config_file);
|
||||
if (rc < 0) {
|
||||
fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
|
||||
return rc;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue