sgsn: Integrate the GSUP client into the SGSN
This commit adds GSUP client configuration (via VTY), connection set up, and real message sending. The following configuration commands are added: - gsup remote-ip A.B.C.D set server IP address - gsup remote-port PORT set server TCP port Ticket: OW#1338 Sponsored-by: On-Waves ehf
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@ -305,7 +305,7 @@ struct gsm_auth_tuple *sgsn_auth_get_tuple(struct sgsn_mm_ctx *mmctx,
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GPRS_SUBSCRIBER_UPDATE_AUTH_INFO_PENDING \
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)
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void gprs_subscr_init(struct sgsn_instance *sgi);
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int gprs_subscr_init(struct sgsn_instance *sgi);
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int gprs_subscr_request_update_location(struct sgsn_mm_ctx *mmctx);
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int gprs_subscr_request_auth_info(struct sgsn_mm_ctx *mmctx);
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void gprs_subscr_delete(struct gsm_subscriber *subscr);
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@ -7,6 +7,8 @@
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#include <osmocom/gprs/gprs_ns.h>
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#include <openbsc/gprs_sgsn.h>
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struct gprs_gsup_client;
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enum sgsn_auth_policy {
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SGSN_AUTH_POLICY_OPEN,
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SGSN_AUTH_POLICY_CLOSED,
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@ -25,6 +27,9 @@ struct sgsn_config {
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enum sgsn_auth_policy auth_policy;
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struct llist_head imsi_acl;
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struct sockaddr_in gsup_server_addr;
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int gsup_server_port;
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};
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struct sgsn_instance {
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@ -38,6 +43,8 @@ struct sgsn_instance {
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struct osmo_timer_list gtp_timer;
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/* GSN instance for libgtp */
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struct gsn_t *gsn;
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/* Subscriber */
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struct gprs_gsup_client *gsup_client;
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};
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extern struct sgsn_instance *sgsn;
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@ -20,6 +20,7 @@
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*/
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#include <openbsc/gsm_subscriber.h>
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#include <openbsc/gprs_gsup_client.h>
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#include <openbsc/sgsn.h>
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#include <openbsc/gprs_sgsn.h>
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@ -28,10 +29,47 @@
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#include <openbsc/debug.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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extern void *tall_bsc_ctx;
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void gprs_subscr_init(struct sgsn_instance *sgi)
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static int gsup_read_cb(struct gprs_gsup_client *gsupc, struct msgb *msg);
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/* TODO: Some functions are specific to the SGSN, but this file is more general
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* (it has gprs_* name). Either move these functions elsewhere, split them and
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* move a part, or replace the gprs_ prefix by sgsn_. The applies to
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* gprs_subscr_init, gsup_read_cb, and gprs_subscr_tx_gsup_message.
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*/
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int gprs_subscr_init(struct sgsn_instance *sgi)
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{
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const char *addr_str;
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if (!sgi->cfg.gsup_server_addr.sin_addr.s_addr)
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return 0;
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addr_str = inet_ntoa(sgi->cfg.gsup_server_addr.sin_addr);
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sgi->gsup_client = gprs_gsup_client_create(
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addr_str, sgi->cfg.gsup_server_port,
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&gsup_read_cb);
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if (!sgi->gsup_client)
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return -1;
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return 1;
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}
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static int gsup_read_cb(struct gprs_gsup_client *gsupc, struct msgb *msg)
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{
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int rc;
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rc = gprs_subscr_rx_gsup_message(msg);
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if (rc < 0)
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return -1;
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return rc;
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}
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static struct sgsn_subscriber_data *sgsn_subscriber_data_alloc(void *ctx)
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@ -96,17 +134,21 @@ void gprs_subscr_put_and_cancel(struct gsm_subscriber *subscr)
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static int gprs_subscr_tx_gsup_message(struct gsm_subscriber *subscr,
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struct gprs_gsup_message *gsup_msg)
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{
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struct msgb *msg = msgb_alloc(4096, __func__);
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struct msgb *msg = gprs_gsup_msgb_alloc();
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strncpy(gsup_msg->imsi, subscr->imsi, sizeof(gsup_msg->imsi) - 1);
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gprs_gsup_encode(msg, gsup_msg);
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LOGMMCTXP(LOGL_INFO, subscr->sgsn_data->mm,
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"Sending GSUP NYI, would send: %s\n", msgb_hexdump(msg));
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msgb_free(msg);
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"Sending GSUP, will send: %s\n", msgb_hexdump(msg));
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return -ENOTSUP;
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if (!sgsn->gsup_client) {
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msgb_free(msg);
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return -ENOTSUP;
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}
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return gprs_gsup_client_send(sgsn->gsup_client, msg);
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}
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static int gprs_subscr_handle_gsup_auth_res(struct gsm_subscriber *subscr,
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@ -357,6 +357,12 @@ int main(int argc, char **argv)
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exit(2);
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}
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rc = gprs_subscr_init(&sgsn_inst);
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if (rc < 0) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot set up subscriber management\n");
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exit(2);
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}
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rc = gprs_ns_nsip_listen(sgsn_nsi);
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if (rc < 0) {
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LOGP(DGPRS, LOGL_FATAL, "Cannot bind/listen on NSIP socket\n");
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@ -139,6 +139,12 @@ static int config_write_sgsn(struct vty *vty)
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vty_out(vty, " auth-policy %s%s",
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get_value_string(sgsn_auth_pol_strs, g_cfg->auth_policy),
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VTY_NEWLINE);
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if (g_cfg->gsup_server_addr.sin_addr.s_addr)
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vty_out(vty, " gsup remote-ip %s%s",
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inet_ntoa(g_cfg->gsup_server_addr.sin_addr), VTY_NEWLINE);
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if (g_cfg->gsup_server_port)
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vty_out(vty, " gsup remote-port %d%s",
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g_cfg->gsup_server_port, VTY_NEWLINE);
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llist_for_each_entry(acl, &g_cfg->imsi_acl, list)
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vty_out(vty, " imsi-acl add %s%s", acl->imsi, VTY_NEWLINE);
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@ -650,6 +656,29 @@ DEFUN(update_subscr_update_auth_info, update_subscr_update_auth_info_cmd,
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return CMD_SUCCESS;
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}
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DEFUN(cfg_gsup_remote_ip, cfg_gsup_remote_ip_cmd,
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"gsup remote-ip A.B.C.D",
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"GSUP Parameters\n"
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"Set the IP address of the remote GSUP server\n"
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"IPv4 Address\n")
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{
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inet_aton(argv[0], &g_cfg->gsup_server_addr.sin_addr);
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return CMD_SUCCESS;
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}
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DEFUN(cfg_gsup_remote_port, cfg_gsup_remote_port_cmd,
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"gsup remote-port <0-65535>",
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"GSUP Parameters\n"
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"Set the TCP port of the remote GSUP server\n"
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"Remote TCP port\n")
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{
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g_cfg->gsup_server_port = atoi(argv[0]);
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return CMD_SUCCESS;
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}
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int sgsn_vty_init(void)
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{
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@ -676,6 +705,8 @@ int sgsn_vty_init(void)
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install_element(SGSN_NODE, &cfg_ggsn_gtp_version_cmd);
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install_element(SGSN_NODE, &cfg_imsi_acl_cmd);
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install_element(SGSN_NODE, &cfg_auth_policy_cmd);
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install_element(SGSN_NODE, &cfg_gsup_remote_ip_cmd);
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install_element(SGSN_NODE, &cfg_gsup_remote_port_cmd);
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return 0;
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}
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@ -22,9 +22,11 @@ sgsn_test_LDADD = \
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$(top_builddir)/src/gprs/sgsn_libgtp.o \
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$(top_builddir)/src/gprs/sgsn_auth.o \
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$(top_builddir)/src/gprs/gprs_gsup_messages.o \
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$(top_builddir)/src/gprs/gprs_gsup_client.o \
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$(top_builddir)/src/gprs/gprs_utils.o \
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$(top_builddir)/src/gprs/gprs_subscriber.o \
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$(top_builddir)/src/libcommon/libcommon.a \
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$(LIBOSMOABIS_LIBS) \
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$(LIBOSMOCORE_LIBS) \
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$(LIBOSMOGSM_LIBS) \
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$(LIBOSMOGB_LIBS) \
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