forked from acouzens/open5gs
226 lines
6.5 KiB
C
226 lines
6.5 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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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 Affero General Public License as published by
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* the Free Software Foundation, either version 3 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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "gtp/gtp-node.h"
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#include "fd/fd-lib.h"
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#include "fd/gx/gx-message.h"
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#include "pgw-sm.h"
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#include "pgw-context.h"
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#include "pgw-event.h"
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#include "pgw-gtp-path.h"
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#include "pgw-s5c-handler.h"
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#include "pgw-gx-handler.h"
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#include "pgw-fd-path.h"
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void pgw_state_initial(ogs_fsm_t *s, pgw_event_t *e)
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{
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pgw_sm_debug(e);
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ogs_assert(s);
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OGS_FSM_TRAN(s, &pgw_state_operational);
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}
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void pgw_state_final(ogs_fsm_t *s, pgw_event_t *e)
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{
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pgw_sm_debug(e);
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ogs_assert(s);
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}
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void pgw_state_operational(ogs_fsm_t *s, pgw_event_t *e)
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{
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int rv;
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pgw_sm_debug(e);
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ogs_assert(s);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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rv = pgw_gtp_open();
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if (rv != OGS_OK)
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ogs_fatal("Can't establish PGW path");
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break;
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case OGS_FSM_EXIT_SIG:
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pgw_gtp_close();
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break;
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case PGW_EVT_S5C_MESSAGE:
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{
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int rv;
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ogs_pkbuf_t *recvbuf = NULL;
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ogs_pkbuf_t *copybuf = NULL;
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uint16_t copybuf_len = 0;
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gtp_xact_t *xact = NULL;
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gtp_message_t *message = NULL;
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pgw_sess_t *sess = NULL;
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ogs_assert(e);
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recvbuf = e->gtpbuf;
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ogs_assert(recvbuf);
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copybuf_len = sizeof(gtp_message_t);
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copybuf = ogs_pkbuf_alloc(NULL, copybuf_len);
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ogs_pkbuf_put(copybuf, copybuf_len);
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message = copybuf->data;
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ogs_assert(message);
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rv = gtp_parse_msg(message, recvbuf);
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ogs_assert(rv == OGS_OK);
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if (message->h.teid == 0) {
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gtp_node_t *sgw = pgw_sgw_add_by_message(message);
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ogs_assert(sgw);
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sess = pgw_sess_add_by_message(message);
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SETUP_GTP_NODE(sess, sgw);
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} else {
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sess = pgw_sess_find_by_teid(message->h.teid);
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}
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ogs_assert(sess);
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rv = gtp_xact_receive(sess->gnode, &message->h, &xact);
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if (rv != OGS_OK) {
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ogs_pkbuf_free(recvbuf);
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ogs_pkbuf_free(copybuf);
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break;
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}
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switch(message->h.type) {
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case GTP_CREATE_SESSION_REQUEST_TYPE:
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pgw_s5c_handle_create_session_request(
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sess, xact, &message->create_session_request);
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pgw_gx_send_ccr(sess, xact, copybuf,
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GX_CC_REQUEST_TYPE_INITIAL_REQUEST);
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break;
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case GTP_DELETE_SESSION_REQUEST_TYPE:
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pgw_s5c_handle_delete_session_request(
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sess, xact, &message->delete_session_request);
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pgw_gx_send_ccr(sess, xact, copybuf,
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GX_CC_REQUEST_TYPE_TERMINATION_REQUEST);
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break;
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case GTP_CREATE_BEARER_RESPONSE_TYPE:
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pgw_s5c_handle_create_bearer_response(
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sess, xact, &message->create_bearer_response);
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ogs_pkbuf_free(copybuf);
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break;
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case GTP_UPDATE_BEARER_RESPONSE_TYPE:
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pgw_s5c_handle_update_bearer_response(
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sess, xact, &message->update_bearer_response);
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ogs_pkbuf_free(copybuf);
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break;
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case GTP_DELETE_BEARER_RESPONSE_TYPE:
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pgw_s5c_handle_delete_bearer_response(
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sess, xact, &message->delete_bearer_response);
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ogs_pkbuf_free(copybuf);
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break;
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default:
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ogs_warn("Not implmeneted(type:%d)", message->h.type);
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ogs_pkbuf_free(copybuf);
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break;
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}
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ogs_pkbuf_free(recvbuf);
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break;
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}
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case PGW_EVT_GX_MESSAGE:
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{
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ogs_index_t sess_index;
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pgw_sess_t *sess = NULL;
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ogs_pkbuf_t *gxbuf = NULL;
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gx_message_t *gx_message = NULL;
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ogs_assert(e);
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gxbuf = e->gxbuf;
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ogs_assert(gxbuf);
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gx_message = gxbuf->data;
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ogs_assert(gx_message);
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sess_index = e->sess_index;
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ogs_assert(sess_index);
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sess = pgw_sess_find(sess_index);
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switch(gx_message->cmd_code) {
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case GX_CMD_CODE_CREDIT_CONTROL:
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{
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uint32_t xact_index;
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gtp_xact_t *xact = NULL;
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ogs_pkbuf_t *gtpbuf = NULL;
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gtp_message_t *message = NULL;
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xact_index = e->xact_index;
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ogs_assert(xact_index);
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xact = gtp_xact_find(xact_index);
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ogs_assert(xact);
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gtpbuf = e->gtpbuf;
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ogs_assert(gtpbuf);
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message = gtpbuf->data;
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if (!sess) {
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ogs_error("No Session");
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ogs_pkbuf_free(gtpbuf);
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break;
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}
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if (gx_message->result_code != ER_DIAMETER_SUCCESS) {
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ogs_error("Diameter Error(%d)", gx_message->result_code);
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ogs_pkbuf_free(gtpbuf);
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break;
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}
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switch(gx_message->cc_request_type) {
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case GX_CC_REQUEST_TYPE_INITIAL_REQUEST:
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pgw_gx_handle_cca_initial_request(
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sess, gx_message, xact,
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&message->create_session_request);
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break;
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case GX_CC_REQUEST_TYPE_TERMINATION_REQUEST:
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pgw_gx_handle_cca_termination_request(
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sess, gx_message, xact,
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&message->delete_session_request);
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break;
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default:
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ogs_error("Not implemented(%d)",
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gx_message->cc_request_type);
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break;
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}
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ogs_pkbuf_free(gtpbuf);
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break;
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}
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case GX_CMD_RE_AUTH:
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pgw_gx_handle_re_auth_request(sess, gx_message);
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break;
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default:
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ogs_error("Invalid type(%d)", gx_message->cmd_code);
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break;
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}
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gx_message_free(gx_message);
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ogs_pkbuf_free(gxbuf);
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break;
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}
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default:
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ogs_error("No handler for event %s", pgw_event_get_name(e));
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break;
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}
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}
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