gprs: Create a gprs_utils file and move to be shared code in there
We intend to move some of these routines to libosmocore but to avoid a feature symbol clash we are prefixing these routines with gprs_. Done with Jacob
This commit is contained in:
parent
1ddd9e518e
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7127b0295e
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@ -14,7 +14,7 @@ noinst_HEADERS = abis_nm.h abis_rsl.h db.h gsm_04_08.h gsm_data.h \
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osmo_msc_data.h osmo_bsc_grace.h sms_queue.h abis_om2000.h \
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osmo_msc_data.h osmo_bsc_grace.h sms_queue.h abis_om2000.h \
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bss.h gsm_data_shared.h control_cmd.h ipaccess.h mncc_int.h \
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bss.h gsm_data_shared.h control_cmd.h ipaccess.h mncc_int.h \
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arfcn_range_encode.h nat_rewrite_trie.h bsc_nat_callstats.h \
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arfcn_range_encode.h nat_rewrite_trie.h bsc_nat_callstats.h \
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osmux.h mgcp_transcode.h rtp.h
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osmux.h mgcp_transcode.h rtp.h gprs_utils.h
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openbsc_HEADERS = gsm_04_08.h meas_rep.h bsc_api.h
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openbsc_HEADERS = gsm_04_08.h meas_rep.h bsc_api.h
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openbscdir = $(includedir)/openbsc
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openbscdir = $(includedir)/openbsc
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@ -0,0 +1,33 @@
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/* GPRS utility functions */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2010-2014 by On-Waves
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* (C) 2013 by Holger Hans Peter Freyther
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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 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <stdint.h>
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#include <sys/types.h>
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struct msgb;
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struct msgb *gprs_msgb_copy(const struct msgb *msg, const char *name);
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int gprs_msgb_resize_area(struct msgb *msg, uint8_t *area,
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size_t old_size, size_t new_size);
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char *gprs_apn_to_str(char *out_str, const uint8_t *apn_enc, size_t rest_chars);
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int gprs_str_to_apn(uint8_t *apn_enc, const char *str, size_t max_chars);
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@ -14,7 +14,7 @@ bin_PROGRAMS = osmo-gbproxy
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endif
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endif
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osmo_gbproxy_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_llc_parse.c crc24.c
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gprs_llc_parse.c crc24.c gprs_utils.c
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osmo_gbproxy_LDADD = $(top_builddir)/src/libcommon/libcommon.a \
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osmo_gbproxy_LDADD = $(top_builddir)/src/libcommon/libcommon.a \
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$(OSMO_LIBS)
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$(OSMO_LIBS)
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@ -47,6 +47,7 @@
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#include <openbsc/gprs_llc.h>
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#include <openbsc/gprs_llc.h>
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#include <openbsc/gsm_04_08.h>
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#include <openbsc/gsm_04_08.h>
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#include <openbsc/gsm_04_08_gprs.h>
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#include <openbsc/gsm_04_08_gprs.h>
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#include <openbsc/gprs_utils.h>
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enum gbprox_global_ctr {
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enum gbprox_global_ctr {
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GBPROX_GLOB_CTR_INV_BVCI,
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GBPROX_GLOB_CTR_INV_BVCI,
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@ -229,47 +230,6 @@ static void peer_free(struct gbproxy_peer *peer)
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talloc_free(peer);
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talloc_free(peer);
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}
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}
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/* FIXME: this needs to go to libosmocore/msgb.c */
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static struct msgb *msgb_copy(const struct msgb *msg, const char *name)
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{
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struct libgb_msgb_cb *old_cb, *new_cb;
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struct msgb *new_msg;
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new_msg = msgb_alloc(msg->data_len, name);
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if (!new_msg)
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return NULL;
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/* copy data */
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memcpy(new_msg->_data, msg->_data, new_msg->data_len);
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/* copy header */
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new_msg->len = msg->len;
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new_msg->data += msg->data - msg->_data;
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new_msg->head += msg->head - msg->_data;
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new_msg->tail += msg->tail - msg->_data;
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new_msg->l1h = new_msg->_data + (msg->l1h - msg->_data);
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new_msg->l2h = new_msg->_data + (msg->l2h - msg->_data);
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new_msg->l3h = new_msg->_data + (msg->l3h - msg->_data);
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new_msg->l4h = new_msg->_data + (msg->l4h - msg->_data);
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/* copy GB specific data */
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old_cb = LIBGB_MSGB_CB(msg);
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new_cb = LIBGB_MSGB_CB(new_msg);
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new_cb->bssgph = new_msg->_data + (old_cb->bssgph - msg->_data);
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new_cb->llch = new_msg->_data + (old_cb->llch - msg->_data);
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/* bssgp_cell_id is a pointer into the old msgb, so we need to make
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* it a pointer into the new msgb */
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new_cb->bssgp_cell_id = new_msg->_data + (old_cb->bssgp_cell_id - msg->_data);
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new_cb->nsei = old_cb->nsei;
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new_cb->bvci = old_cb->bvci;
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new_cb->tlli = old_cb->tlli;
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return new_msg;
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}
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/* strip off the NS header */
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/* strip off the NS header */
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static void strip_ns_hdr(struct msgb *msg)
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static void strip_ns_hdr(struct msgb *msg)
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{
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{
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@ -277,89 +237,6 @@ static void strip_ns_hdr(struct msgb *msg)
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msgb_pull(msg, strip_len);
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msgb_pull(msg, strip_len);
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}
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}
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/* TODO: Move this to libosmocore/msgb.c */
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static int msgb_resize_area(struct msgb *msg, uint8_t *area,
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size_t old_size, size_t new_size)
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{
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int rc;
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uint8_t *rest = area + old_size;
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int rest_len = msg->len - old_size - (area - msg->data);
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int delta_size = (int)new_size - (int)old_size;
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if (delta_size == 0)
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return 0;
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if (delta_size > 0) {
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rc = msgb_trim(msg, msg->len + delta_size);
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if (rc < 0)
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return rc;
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}
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memmove(area + new_size, area + old_size, rest_len);
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if (msg->l1h >= rest)
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msg->l1h += delta_size;
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if (msg->l2h >= rest)
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msg->l2h += delta_size;
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if (msg->l3h >= rest)
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msg->l3h += delta_size;
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if (msg->l4h >= rest)
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msg->l4h += delta_size;
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if (delta_size < 0)
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msgb_trim(msg, msg->len + delta_size);
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return 0;
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}
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/* TODO: Move these conversion functions to a utils file. */
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char * gbprox_apn_to_str(char *out_str, const uint8_t *apn_enc, size_t rest_chars)
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{
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char *str = out_str;
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while (rest_chars > 0 && apn_enc[0]) {
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size_t label_size = apn_enc[0];
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if (label_size + 1 > rest_chars)
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return NULL;
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memmove(str, apn_enc + 1, label_size);
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str += label_size;
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rest_chars -= label_size + 1;
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apn_enc += label_size + 1;
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if (rest_chars)
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*(str++) = '.';
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}
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str[0] = '\0';
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return out_str;
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}
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int gbprox_str_to_apn(uint8_t *apn_enc, const char *str, size_t max_chars)
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{
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uint8_t *last_len_field = apn_enc;
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int len = 1;
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apn_enc += 1;
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while (str[0]) {
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if (str[0] == '.') {
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*last_len_field = (apn_enc - last_len_field) - 1;
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last_len_field = apn_enc;
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} else {
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*apn_enc = str[0];
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}
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apn_enc += 1;
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str += 1;
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len += 1;
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if (len > max_chars)
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return -1;
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}
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*last_len_field = (apn_enc - last_len_field) - 1;
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return len;
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}
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/* TODO: Move shift functions to libosmocore */
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/* TODO: Move shift functions to libosmocore */
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int v_fixed_shift(uint8_t **data, size_t *data_len,
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int v_fixed_shift(uint8_t **data, size_t *data_len,
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@ -888,10 +765,10 @@ static void gbprox_patch_apn_ie(struct msgb *msg,
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LOGP(DGPRS, LOGL_DEBUG,
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LOGP(DGPRS, LOGL_DEBUG,
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"Patching %s to SGSN: Removing APN '%s'\n",
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"Patching %s to SGSN: Removing APN '%s'\n",
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log_text,
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log_text,
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gbprox_apn_to_str(str1, apn, apn_len));
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gprs_apn_to_str(str1, apn, apn_len));
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*new_apn_ie_len = 0;
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*new_apn_ie_len = 0;
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msgb_resize_area(msg, apn_ie, apn_ie_len, 0);
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gprs_msgb_resize_area(msg, apn_ie, apn_ie_len, 0);
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} else {
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} else {
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/* Resize the IE */
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/* Resize the IE */
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char str1[110];
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char str1[110];
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@ -903,12 +780,12 @@ static void gbprox_patch_apn_ie(struct msgb *msg,
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"Patching %s to SGSN: "
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"Patching %s to SGSN: "
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"Replacing APN '%s' -> '%s'\n",
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"Replacing APN '%s' -> '%s'\n",
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log_text,
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log_text,
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gbprox_apn_to_str(str1, apn, apn_len),
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gprs_apn_to_str(str1, apn, apn_len),
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gbprox_apn_to_str(str2, gbcfg.core_apn,
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gprs_apn_to_str(str2, gbcfg.core_apn,
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gbcfg.core_apn_size));
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gbcfg.core_apn_size));
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*new_apn_ie_len = gbcfg.core_apn_size + 2;
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*new_apn_ie_len = gbcfg.core_apn_size + 2;
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msgb_resize_area(msg, apn, apn_len, gbcfg.core_apn_size);
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gprs_msgb_resize_area(msg, apn, apn_len, gbcfg.core_apn_size);
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memcpy(apn, gbcfg.core_apn, gbcfg.core_apn_size);
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memcpy(apn, gbcfg.core_apn, gbcfg.core_apn_size);
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hdr->apn_len = gbcfg.core_apn_size;
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hdr->apn_len = gbcfg.core_apn_size;
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}
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}
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@ -1411,7 +1288,7 @@ static int gbprox_relay2sgsn(struct msgb *old_msg,
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{
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{
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/* create a copy of the message so the old one can
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/* create a copy of the message so the old one can
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* be free()d safely when we return from gbprox_rcvmsg() */
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* be free()d safely when we return from gbprox_rcvmsg() */
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struct msgb *msg = msgb_copy(old_msg, "msgb_relay2sgsn");
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struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2sgsn");
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int rc;
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int rc;
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gbprox_patch_bssgp_message(msg, peer, 0);
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gbprox_patch_bssgp_message(msg, peer, 0);
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@ -1437,7 +1314,7 @@ static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_peer *peer,
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{
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{
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/* create a copy of the message so the old one can
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/* create a copy of the message so the old one can
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* be free()d safely when we return from gbprox_rcvmsg() */
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* be free()d safely when we return from gbprox_rcvmsg() */
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struct msgb *msg = msgb_copy(old_msg, "msgb_relay2peer");
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struct msgb *msg = gprs_msgb_copy(old_msg, "msgb_relay2peer");
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int rc;
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int rc;
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DEBUGP(DGPRS, "NSEI=%u proxying SGSN->BSS (NS_BVCI=%u, NSEI=%u)\n",
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DEBUGP(DGPRS, "NSEI=%u proxying SGSN->BSS (NS_BVCI=%u, NSEI=%u)\n",
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@ -32,6 +32,7 @@
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#include <openbsc/debug.h>
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#include <openbsc/debug.h>
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#include <openbsc/gb_proxy.h>
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#include <openbsc/gb_proxy.h>
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#include <openbsc/gprs_utils.h>
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#include <openbsc/vty.h>
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#include <openbsc/vty.h>
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#include <osmocom/vty/command.h>
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#include <osmocom/vty/command.h>
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@ -92,7 +93,7 @@ static int config_write_gbproxy(struct vty *vty)
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if (g_cfg->core_apn_size > 0) {
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if (g_cfg->core_apn_size > 0) {
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char str[500] = {0};
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char str[500] = {0};
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vty_out(vty, " core-access-point-name %s",
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vty_out(vty, " core-access-point-name %s",
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gbprox_apn_to_str(str, g_cfg->core_apn,
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gprs_apn_to_str(str, g_cfg->core_apn,
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g_cfg->core_apn_size));
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g_cfg->core_apn_size));
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} else {
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} else {
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vty_out(vty, " core-access-point-name none");
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vty_out(vty, " core-access-point-name none");
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@ -229,7 +230,7 @@ static int set_core_apn(struct vty *vty, const char *apn, const char *filter)
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g_cfg->core_apn =
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g_cfg->core_apn =
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talloc_realloc_size(NULL, g_cfg->core_apn, apn_len + 1);
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talloc_realloc_size(NULL, g_cfg->core_apn, apn_len + 1);
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g_cfg->core_apn_size =
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g_cfg->core_apn_size =
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gbprox_str_to_apn(g_cfg->core_apn, apn, apn_len + 1);
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gprs_str_to_apn(g_cfg->core_apn, apn, apn_len + 1);
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}
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}
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return CMD_SUCCESS;
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return CMD_SUCCESS;
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@ -0,0 +1,152 @@
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/* GPRS utility functions */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2010-2014 by On-Waves
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* (C) 2013 by Holger Hans Peter Freyther
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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 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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||||||
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <openbsc/gprs_utils.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/gprs/gprs_ns.h>
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|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
/* FIXME: this needs to go to libosmocore/msgb.c */
|
||||||
|
struct msgb *gprs_msgb_copy(const struct msgb *msg, const char *name)
|
||||||
|
{
|
||||||
|
struct libgb_msgb_cb *old_cb, *new_cb;
|
||||||
|
struct msgb *new_msg;
|
||||||
|
|
||||||
|
new_msg = msgb_alloc(msg->data_len, name);
|
||||||
|
if (!new_msg)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
/* copy data */
|
||||||
|
memcpy(new_msg->_data, msg->_data, new_msg->data_len);
|
||||||
|
|
||||||
|
/* copy header */
|
||||||
|
new_msg->len = msg->len;
|
||||||
|
new_msg->data += msg->data - msg->_data;
|
||||||
|
new_msg->head += msg->head - msg->_data;
|
||||||
|
new_msg->tail += msg->tail - msg->_data;
|
||||||
|
|
||||||
|
new_msg->l1h = new_msg->_data + (msg->l1h - msg->_data);
|
||||||
|
new_msg->l2h = new_msg->_data + (msg->l2h - msg->_data);
|
||||||
|
new_msg->l3h = new_msg->_data + (msg->l3h - msg->_data);
|
||||||
|
new_msg->l4h = new_msg->_data + (msg->l4h - msg->_data);
|
||||||
|
|
||||||
|
/* copy GB specific data */
|
||||||
|
old_cb = LIBGB_MSGB_CB(msg);
|
||||||
|
new_cb = LIBGB_MSGB_CB(new_msg);
|
||||||
|
|
||||||
|
new_cb->bssgph = new_msg->_data + (old_cb->bssgph - msg->_data);
|
||||||
|
new_cb->llch = new_msg->_data + (old_cb->llch - msg->_data);
|
||||||
|
|
||||||
|
/* bssgp_cell_id is a pointer into the old msgb, so we need to make
|
||||||
|
* it a pointer into the new msgb */
|
||||||
|
new_cb->bssgp_cell_id = new_msg->_data + (old_cb->bssgp_cell_id - msg->_data);
|
||||||
|
new_cb->nsei = old_cb->nsei;
|
||||||
|
new_cb->bvci = old_cb->bvci;
|
||||||
|
new_cb->tlli = old_cb->tlli;
|
||||||
|
|
||||||
|
return new_msg;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* TODO: Move this to libosmocore/msgb.c */
|
||||||
|
int gprs_msgb_resize_area(struct msgb *msg, uint8_t *area,
|
||||||
|
size_t old_size, size_t new_size)
|
||||||
|
{
|
||||||
|
int rc;
|
||||||
|
uint8_t *rest = area + old_size;
|
||||||
|
int rest_len = msg->len - old_size - (area - msg->data);
|
||||||
|
int delta_size = (int)new_size - (int)old_size;
|
||||||
|
|
||||||
|
if (delta_size == 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if (delta_size > 0) {
|
||||||
|
rc = msgb_trim(msg, msg->len + delta_size);
|
||||||
|
if (rc < 0)
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
memmove(area + new_size, area + old_size, rest_len);
|
||||||
|
|
||||||
|
if (msg->l1h >= rest)
|
||||||
|
msg->l1h += delta_size;
|
||||||
|
if (msg->l2h >= rest)
|
||||||
|
msg->l2h += delta_size;
|
||||||
|
if (msg->l3h >= rest)
|
||||||
|
msg->l3h += delta_size;
|
||||||
|
if (msg->l4h >= rest)
|
||||||
|
msg->l4h += delta_size;
|
||||||
|
|
||||||
|
if (delta_size < 0)
|
||||||
|
msgb_trim(msg, msg->len + delta_size);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* TODO: Move these conversion functions to a utils file. */
|
||||||
|
char * gprs_apn_to_str(char *out_str, const uint8_t *apn_enc, size_t rest_chars)
|
||||||
|
{
|
||||||
|
char *str = out_str;
|
||||||
|
|
||||||
|
while (rest_chars > 0 && apn_enc[0]) {
|
||||||
|
size_t label_size = apn_enc[0];
|
||||||
|
if (label_size + 1 > rest_chars)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
memmove(str, apn_enc + 1, label_size);
|
||||||
|
str += label_size;
|
||||||
|
rest_chars -= label_size + 1;
|
||||||
|
apn_enc += label_size + 1;
|
||||||
|
|
||||||
|
if (rest_chars)
|
||||||
|
*(str++) = '.';
|
||||||
|
}
|
||||||
|
str[0] = '\0';
|
||||||
|
|
||||||
|
return out_str;
|
||||||
|
}
|
||||||
|
|
||||||
|
int gprs_str_to_apn(uint8_t *apn_enc, const char *str, size_t max_chars)
|
||||||
|
{
|
||||||
|
uint8_t *last_len_field = apn_enc;
|
||||||
|
int len = 1;
|
||||||
|
apn_enc += 1;
|
||||||
|
|
||||||
|
while (str[0]) {
|
||||||
|
if (str[0] == '.') {
|
||||||
|
*last_len_field = (apn_enc - last_len_field) - 1;
|
||||||
|
last_len_field = apn_enc;
|
||||||
|
} else {
|
||||||
|
*apn_enc = str[0];
|
||||||
|
}
|
||||||
|
apn_enc += 1;
|
||||||
|
str += 1;
|
||||||
|
len += 1;
|
||||||
|
if (len > max_chars)
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
*last_len_field = (apn_enc - last_len_field) - 1;
|
||||||
|
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
|
@ -11,6 +11,7 @@ gbproxy_test_LDADD = \
|
||||||
$(top_builddir)/src/gprs/gb_proxy.o \
|
$(top_builddir)/src/gprs/gb_proxy.o \
|
||||||
$(top_builddir)/src/gprs/gprs_llc_parse.o \
|
$(top_builddir)/src/gprs/gprs_llc_parse.o \
|
||||||
$(top_builddir)/src/gprs/crc24.o \
|
$(top_builddir)/src/gprs/crc24.o \
|
||||||
|
$(top_builddir)/src/gprs/gprs_utils.o \
|
||||||
$(top_builddir)/src/libcommon/libcommon.a \
|
$(top_builddir)/src/libcommon/libcommon.a \
|
||||||
$(top_builddir)/src/libbsc/libbsc.a \
|
$(top_builddir)/src/libbsc/libbsc.a \
|
||||||
$(top_builddir)/src/libtrau/libtrau.a \
|
$(top_builddir)/src/libtrau/libtrau.a \
|
||||||
|
|
|
@ -30,6 +30,7 @@
|
||||||
#include <osmocom/gprs/gprs_bssgp.h>
|
#include <osmocom/gprs/gprs_bssgp.h>
|
||||||
|
|
||||||
#include <openbsc/gb_proxy.h>
|
#include <openbsc/gb_proxy.h>
|
||||||
|
#include <openbsc/gprs_utils.h>
|
||||||
#include <openbsc/debug.h>
|
#include <openbsc/debug.h>
|
||||||
|
|
||||||
#define REMOTE_BSS_ADDR 0x01020304
|
#define REMOTE_BSS_ADDR 0x01020304
|
||||||
|
@ -944,7 +945,7 @@ static void test_gbproxy_ra_patching()
|
||||||
gbcfg.core_mcc = 123;
|
gbcfg.core_mcc = 123;
|
||||||
gbcfg.core_mnc = 456;
|
gbcfg.core_mnc = 456;
|
||||||
gbcfg.core_apn = talloc_zero_size(NULL, 100);
|
gbcfg.core_apn = talloc_zero_size(NULL, 100);
|
||||||
gbcfg.core_apn_size = gbprox_str_to_apn(gbcfg.core_apn, "foo.bar", 100);
|
gbcfg.core_apn_size = gprs_str_to_apn(gbcfg.core_apn, "foo.bar", 100);
|
||||||
|
|
||||||
configure_sgsn_peer(&sgsn_peer);
|
configure_sgsn_peer(&sgsn_peer);
|
||||||
configure_bss_peers(bss_peer, ARRAY_SIZE(bss_peer));
|
configure_bss_peers(bss_peer, ARRAY_SIZE(bss_peer));
|
||||||
|
|
Loading…
Reference in New Issue