diff options
author | Neels Hofmeyr <nhofmeyr@sysmocom.de> | 2017-07-13 02:03:50 +0200 |
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committer | Neels Hofmeyr <neels@hofmeyr.de> | 2017-08-30 14:14:58 +0200 |
commit | ee6cfdc0d9710e3a69c8e1939eb21c8f2b759885 (patch) | |
tree | ed5aeb0979a1838778649078847a1ed6caa6b1a4 /src/osmo-bsc_nat/bsc_nat_utils.c | |
parent | 6c809185ee86d318d10205756bb6d91914d11fdf (diff) |
split off osmo-sgsn: remove files, apply build1.1.0
Change-Id: I5d27ff93e56cd13e0e70edd15e2080201e35e91f
Diffstat (limited to 'src/osmo-bsc_nat/bsc_nat_utils.c')
-rw-r--r-- | src/osmo-bsc_nat/bsc_nat_utils.c | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/src/osmo-bsc_nat/bsc_nat_utils.c b/src/osmo-bsc_nat/bsc_nat_utils.c deleted file mode 100644 index c12b29f1f..000000000 --- a/src/osmo-bsc_nat/bsc_nat_utils.c +++ /dev/null @@ -1,535 +0,0 @@ - -/* BSC Multiplexer/NAT Utilities */ - -/* - * (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org> - * (C) 2010-2011 by On-Waves - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - -#include <openbsc/bsc_nat.h> -#include <openbsc/bsc_nat_sccp.h> -#include <openbsc/bsc_msg_filter.h> -#include <openbsc/bsc_msc.h> -#include <openbsc/gsm_data.h> -#include <openbsc/debug.h> -#include <openbsc/ipaccess.h> -#include <openbsc/vty.h> - -#include <osmocom/core/linuxlist.h> -#include <osmocom/core/talloc.h> -#include <osmocom/core/stats.h> -#include <osmocom/gsm/gsm0808.h> -#include <osmocom/gsm/ipa.h> - -#include <osmocom/gsm/protocol/gsm_08_08.h> -#include <osmocom/gsm/protocol/gsm_04_11.h> - -#include <osmocom/sccp/sccp.h> - -#include <netinet/in.h> -#include <arpa/inet.h> -#include <unistd.h> - -static const struct rate_ctr_desc bsc_cfg_ctr_description[] = { - [BCFG_CTR_SCCP_CONN] = { "sccp.conn", "SCCP Connections "}, - [BCFG_CTR_SCCP_CALLS] = { "sccp.calls", "SCCP Assignment Commands "}, - [BCFG_CTR_NET_RECONN] = { "net.reconnects", "Network reconnects "}, - [BCFG_CTR_DROPPED_SCCP] = { "dropped.sccp", "Dropped SCCP connections."}, - [BCFG_CTR_DROPPED_CALLS] = { "dropped.calls", "Dropped active calls. "}, - [BCFG_CTR_REJECTED_CR] = { "rejected.cr", "Rejected CR due filter "}, - [BCFG_CTR_REJECTED_MSG] = { "rejected.msg", "Rejected MSG due filter "}, - [BCFG_CTR_ILL_PACKET] = { "rejected.ill", "Rejected due parse error "}, - [BCFG_CTR_CON_TYPE_LU] = { "conn.lu", "Conn Location Update "}, - [BCFG_CTR_CON_CMSERV_RQ] = { "conn.rq", "Conn CM Service Req "}, - [BCFG_CTR_CON_PAG_RESP] = { "conn.pag", "Conn Paging Response "}, - [BCFG_CTR_CON_SSA] = { "conn.ssa", "Conn USSD "}, - [BCFG_CTR_CON_OTHER] = { "conn.other", "Conn Other "}, -}; - -static const struct rate_ctr_group_desc bsc_cfg_ctrg_desc = { - .group_name_prefix = "nat.bsc", - .group_description = "NAT BSC Statistics", - .num_ctr = ARRAY_SIZE(bsc_cfg_ctr_description), - .ctr_desc = bsc_cfg_ctr_description, - .class_id = OSMO_STATS_CLASS_PEER, -}; - -struct bsc_nat *bsc_nat_alloc(void) -{ - struct bsc_nat *nat = talloc_zero(tall_bsc_ctx, struct bsc_nat); - if (!nat) - return NULL; - - nat->main_dest = talloc_zero(nat, struct bsc_msc_dest); - if (!nat->main_dest) { - talloc_free(nat); - return NULL; - } - - INIT_LLIST_HEAD(&nat->sccp_connections); - INIT_LLIST_HEAD(&nat->bsc_connections); - INIT_LLIST_HEAD(&nat->paging_groups); - INIT_LLIST_HEAD(&nat->bsc_configs); - INIT_LLIST_HEAD(&nat->access_lists); - INIT_LLIST_HEAD(&nat->dests); - INIT_LLIST_HEAD(&nat->num_rewr); - INIT_LLIST_HEAD(&nat->num_rewr_post); - INIT_LLIST_HEAD(&nat->smsc_rewr); - INIT_LLIST_HEAD(&nat->tpdest_match); - INIT_LLIST_HEAD(&nat->sms_clear_tp_srr); - INIT_LLIST_HEAD(&nat->sms_num_rewr); - - nat->stats.sccp.conn = osmo_counter_alloc("nat.sccp.conn"); - nat->stats.sccp.calls = osmo_counter_alloc("nat.sccp.calls"); - nat->stats.bsc.reconn = osmo_counter_alloc("nat.bsc.conn"); - nat->stats.bsc.auth_fail = osmo_counter_alloc("nat.bsc.auth_fail"); - nat->stats.msc.reconn = osmo_counter_alloc("nat.msc.conn"); - nat->stats.ussd.reconn = osmo_counter_alloc("nat.ussd.conn"); - nat->auth_timeout = 2; - nat->ping_timeout = 20; - nat->pong_timeout = 5; - - llist_add(&nat->main_dest->list, &nat->dests); - nat->main_dest->ip = talloc_strdup(nat, "127.0.0.1"); - nat->main_dest->port = 5000; - - return nat; -} - -void bsc_nat_free(struct bsc_nat *nat) -{ - struct bsc_config *cfg, *tmp; - struct bsc_msg_acc_lst *lst, *tmp_lst; - - llist_for_each_entry_safe(cfg, tmp, &nat->bsc_configs, entry) - bsc_config_free(cfg); - llist_for_each_entry_safe(lst, tmp_lst, &nat->access_lists, list) - bsc_msg_acc_lst_delete(lst); - - bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, NULL); - bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr_post, NULL); - bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_clear_tp_srr, NULL); - bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_num_rewr, NULL); - bsc_nat_num_rewr_entry_adapt(nat, &nat->tpdest_match, NULL); - - osmo_counter_free(nat->stats.sccp.conn); - osmo_counter_free(nat->stats.sccp.calls); - osmo_counter_free(nat->stats.bsc.reconn); - osmo_counter_free(nat->stats.bsc.auth_fail); - osmo_counter_free(nat->stats.msc.reconn); - osmo_counter_free(nat->stats.ussd.reconn); - talloc_free(nat->mgcp_cfg); - talloc_free(nat); -} - -void bsc_nat_set_msc_ip(struct bsc_nat *nat, const char *ip) -{ - osmo_talloc_replace_string(nat, &nat->main_dest->ip, ip); -} - -struct bsc_connection *bsc_connection_alloc(struct bsc_nat *nat) -{ - struct bsc_connection *con = talloc_zero(nat, struct bsc_connection); - if (!con) - return NULL; - - con->nat = nat; - osmo_wqueue_init(&con->write_queue, 100); - INIT_LLIST_HEAD(&con->cmd_pending); - INIT_LLIST_HEAD(&con->pending_dlcx); - return con; -} - -struct bsc_config *bsc_config_alloc(struct bsc_nat *nat, const char *token, - unsigned int number) -{ - struct bsc_config *conf = talloc_zero(nat, struct bsc_config); - if (!conf) - return NULL; - - conf->token = talloc_strdup(conf, token); - conf->nr = number; - conf->nat = nat; - conf->max_endpoints = 32; - conf->paging_group = PAGIN_GROUP_UNASSIGNED; - - INIT_LLIST_HEAD(&conf->lac_list); - - llist_add_tail(&conf->entry, &nat->bsc_configs); - ++nat->num_bsc; - - conf->stats.ctrg = rate_ctr_group_alloc(conf, &bsc_cfg_ctrg_desc, conf->nr); - if (!conf->stats.ctrg) { - llist_del(&conf->entry); - talloc_free(conf); - return NULL; - } - - return conf; -} - -struct bsc_config *bsc_config_by_token(struct bsc_nat *nat, const char *token, int len) -{ - struct bsc_config *conf; - - llist_for_each_entry(conf, &nat->bsc_configs, entry) { - /* - * Add the '\0' of the token for the memcmp, the IPA messages - * for some reason added null termination. - */ - const int token_len = strlen(conf->token) + 1; - - if (token_len == len && memcmp(conf->token, token, token_len) == 0) - return conf; - } - - return NULL; -} - -void bsc_config_free(struct bsc_config *cfg) -{ - llist_del(&cfg->entry); - rate_ctr_group_free(cfg->stats.ctrg); - cfg->nat->num_bsc--; - OSMO_ASSERT(cfg->nat->num_bsc >= 0) - talloc_free(cfg); -} - -static void _add_lac(void *ctx, struct llist_head *list, int _lac) -{ - struct bsc_lac_entry *lac; - - llist_for_each_entry(lac, list, entry) - if (lac->lac == _lac) - return; - - lac = talloc_zero(ctx, struct bsc_lac_entry); - if (!lac) { - LOGP(DNAT, LOGL_ERROR, "Failed to allocate.\n"); - return; - } - - lac->lac = _lac; - llist_add_tail(&lac->entry, list); -} - -static void _del_lac(struct llist_head *list, int _lac) -{ - struct bsc_lac_entry *lac; - - llist_for_each_entry(lac, list, entry) - if (lac->lac == _lac) { - llist_del(&lac->entry); - talloc_free(lac); - return; - } -} - -void bsc_config_add_lac(struct bsc_config *cfg, int _lac) -{ - _add_lac(cfg, &cfg->lac_list, _lac); -} - -void bsc_config_del_lac(struct bsc_config *cfg, int _lac) -{ - _del_lac(&cfg->lac_list, _lac); -} - -struct bsc_nat_paging_group *bsc_nat_paging_group_create(struct bsc_nat *nat, int group) -{ - struct bsc_nat_paging_group *pgroup; - - pgroup = talloc_zero(nat, struct bsc_nat_paging_group); - if (!pgroup) { - LOGP(DNAT, LOGL_ERROR, "Failed to allocate a paging group.\n"); - return NULL; - } - - pgroup->nr = group; - INIT_LLIST_HEAD(&pgroup->lists); - llist_add_tail(&pgroup->entry, &nat->paging_groups); - return pgroup; -} - -void bsc_nat_paging_group_delete(struct bsc_nat_paging_group *pgroup) -{ - llist_del(&pgroup->entry); - talloc_free(pgroup); -} - -struct bsc_nat_paging_group *bsc_nat_paging_group_num(struct bsc_nat *nat, int group) -{ - struct bsc_nat_paging_group *pgroup; - - llist_for_each_entry(pgroup, &nat->paging_groups, entry) - if (pgroup->nr == group) - return pgroup; - - return NULL; -} - -void bsc_nat_paging_group_add_lac(struct bsc_nat_paging_group *pgroup, int lac) -{ - _add_lac(pgroup, &pgroup->lists, lac); -} - -void bsc_nat_paging_group_del_lac(struct bsc_nat_paging_group *pgroup, int lac) -{ - _del_lac(&pgroup->lists, lac); -} - -int bsc_config_handles_lac(struct bsc_config *cfg, int lac_nr) -{ - struct bsc_nat_paging_group *pgroup; - struct bsc_lac_entry *entry; - - llist_for_each_entry(entry, &cfg->lac_list, entry) - if (entry->lac == lac_nr) - return 1; - - /* now lookup the paging group */ - pgroup = bsc_nat_paging_group_num(cfg->nat, cfg->paging_group); - if (!pgroup) - return 0; - - llist_for_each_entry(entry, &pgroup->lists, entry) - if (entry->lac == lac_nr) - return 1; - - return 0; -} - -void sccp_connection_destroy(struct nat_sccp_connection *conn) -{ - LOGP(DNAT, LOGL_DEBUG, "Destroy 0x%x <-> 0x%x mapping for con %p\n", - sccp_src_ref_to_int(&conn->real_ref), - sccp_src_ref_to_int(&conn->patched_ref), conn->bsc); - bsc_mgcp_dlcx(conn); - llist_del(&conn->list_entry); - talloc_free(conn); -} - - -int bsc_nat_find_paging(struct msgb *msg, - const uint8_t **out_data, int *out_leng) -{ - int data_length; - const uint8_t *data; - struct tlv_parsed tp; - - if (!msg->l3h || msgb_l3len(msg) < 3) { - LOGP(DNAT, LOGL_ERROR, "Paging message is too short.\n"); - return -1; - } - - tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0); - if (!TLVP_PRESENT(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST)) { - LOGP(DNAT, LOGL_ERROR, "No CellIdentifier List inside paging msg.\n"); - return -2; - } - - data_length = TLVP_LEN(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST); - data = TLVP_VAL(&tp, GSM0808_IE_CELL_IDENTIFIER_LIST); - - /* No need to try a different BSS */ - if (data[0] == CELL_IDENT_BSS) { - return -3; - } else if (data[0] != CELL_IDENT_LAC) { - LOGP(DNAT, LOGL_ERROR, "Unhandled cell ident discrminator: %d\n", data[0]); - return -4; - } - - *out_data = &data[1]; - *out_leng = data_length - 1; - return 0; -} - -int bsc_write_mgcp(struct bsc_connection *bsc, const uint8_t *data, unsigned int length) -{ - struct msgb *msg; - - if (length > 4096 - 128) { - LOGP(DLINP, LOGL_ERROR, "Can not send message of that size.\n"); - return -1; - } - - msg = msgb_alloc_headroom(4096, 128, "to-bsc"); - if (!msg) { - LOGP(DLINP, LOGL_ERROR, "Failed to allocate memory for BSC msg.\n"); - return -1; - } - - /* copy the data */ - msg->l3h = msgb_put(msg, length); - memcpy(msg->l3h, data, length); - - return bsc_write(bsc, msg, IPAC_PROTO_MGCP_OLD); -} - -int bsc_write(struct bsc_connection *bsc, struct msgb *msg, int proto) -{ - return bsc_do_write(&bsc->write_queue, msg, proto); -} - -int bsc_do_write(struct osmo_wqueue *queue, struct msgb *msg, int proto) -{ - /* prepend the header */ - ipa_prepend_header(msg, proto); - return bsc_write_msg(queue, msg); -} - -int bsc_write_msg(struct osmo_wqueue *queue, struct msgb *msg) -{ - if (osmo_wqueue_enqueue(queue, msg) != 0) { - LOGP(DLINP, LOGL_ERROR, "Failed to enqueue the write.\n"); - msgb_free(msg); - return -1; - } - - return 0; -} - -struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed, - struct msgb *msg, uint32_t *len) -{ - /* gsm_type is actually the size of the dtap */ - *len = parsed->gsm_type; - if (*len < msgb_l3len(msg) - 3) { - LOGP(DNAT, LOGL_ERROR, "Not enough space for DTAP.\n"); - return NULL; - } - - if (msgb_l3len(msg) - 3 < msg->l3h[2]) { - LOGP(DNAT, LOGL_ERROR, - "GSM48 payload does not fit: %d %d\n", - msg->l3h[2], msgb_l3len(msg) - 3); - return NULL; - } - - msg->l4h = &msg->l3h[3]; - return (struct gsm48_hdr *) msg->l4h; -} - -static const char *con_types [] = { - [FLT_CON_TYPE_NONE] = "n/a", - [FLT_CON_TYPE_LU] = "Location Update", - [FLT_CON_TYPE_CM_SERV_REQ] = "CM Serv Req", - [FLT_CON_TYPE_PAG_RESP] = "Paging Response", - [FLT_CON_TYPE_SSA] = "Supplementar Service Activation", - [FLT_CON_TYPE_LOCAL_REJECT] = "Local Reject", - [FLT_CON_TYPE_OTHER] = "Other", -}; - -const char *bsc_con_type_to_string(int type) -{ - return con_types[type]; -} - -int bsc_nat_msc_is_connected(struct bsc_nat *nat) -{ - return nat->msc_con->is_connected; -} - -static const int con_to_ctr[] = { - [FLT_CON_TYPE_NONE] = -1, - [FLT_CON_TYPE_LU] = BCFG_CTR_CON_TYPE_LU, - [FLT_CON_TYPE_CM_SERV_REQ] = BCFG_CTR_CON_CMSERV_RQ, - [FLT_CON_TYPE_PAG_RESP] = BCFG_CTR_CON_PAG_RESP, - [FLT_CON_TYPE_SSA] = BCFG_CTR_CON_SSA, - [FLT_CON_TYPE_LOCAL_REJECT] = -1, - [FLT_CON_TYPE_OTHER] = BCFG_CTR_CON_OTHER, -}; - -int bsc_conn_type_to_ctr(struct nat_sccp_connection *conn) -{ - return con_to_ctr[conn->filter_state.con_type]; -} - -int bsc_write_cb(struct osmo_fd *bfd, struct msgb *msg) -{ - int rc; - - rc = write(bfd->fd, msg->data, msg->len); - if (rc != msg->len) - LOGP(DNAT, LOGL_ERROR, "Failed to write message to the BSC.\n"); - - return rc; -} - -static void extract_lac(const uint8_t *data, uint16_t *lac, uint16_t *ci) -{ - memcpy(lac, &data[0], sizeof(*lac)); - memcpy(ci, &data[2], sizeof(*ci)); - - *lac = ntohs(*lac); - *ci = ntohs(*ci); -} - -int bsc_nat_extract_lac(struct bsc_connection *bsc, - struct nat_sccp_connection *con, - struct bsc_nat_parsed *parsed, struct msgb *msg) -{ - int data_length; - const uint8_t *data; - struct tlv_parsed tp; - uint16_t lac, ci; - - if (parsed->gsm_type != BSS_MAP_MSG_COMPLETE_LAYER_3) { - LOGP(DNAT, LOGL_ERROR, "Can only extract LAC from Complete Layer3\n"); - return -1; - } - - if (!msg->l3h || msgb_l3len(msg) < 3) { - LOGP(DNAT, LOGL_ERROR, "Complete Layer3 mssage is too short.\n"); - return -1; - } - - tlv_parse(&tp, gsm0808_att_tlvdef(), msg->l3h + 3, msgb_l3len(msg) - 3, 0, 0); - if (!TLVP_PRESENT(&tp, GSM0808_IE_CELL_IDENTIFIER)) { - LOGP(DNAT, LOGL_ERROR, "No CellIdentifier List inside paging msg.\n"); - return -2; - } - - data_length = TLVP_LEN(&tp, GSM0808_IE_CELL_IDENTIFIER); - data = TLVP_VAL(&tp, GSM0808_IE_CELL_IDENTIFIER); - - /* Attemt to get the LAC/CI from it */ - if (data[0] == CELL_IDENT_WHOLE_GLOBAL) { - if (data_length != 8) { - LOGP(DNAT, LOGL_ERROR, - "Ident too short: %d\n", data_length); - return -3; - } - extract_lac(&data[1 + 3], &lac, &ci); - } else if (data[0] == CELL_IDENT_LAC_AND_CI) { - if (data_length != 5) { - LOGP(DNAT, LOGL_ERROR, - "Ident too short: %d\n", data_length); - return -3; - } - extract_lac(&data[1], &lac, &ci); - } else { - LOGP(DNAT, LOGL_ERROR, - "Unhandled cell identifier: %d\n", data[0]); - return -1; - } - - con->lac = lac; - con->ci = ci; - return 0; -} |