| /* SMPP 3.4 interface, SMSC-side implementation */ |
| /* (C) 2012 by Harald Welte <laforge@gnumonks.org> |
| * |
| * 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 <stdio.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <stdint.h> |
| #include <errno.h> |
| #include <limits.h> |
| |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| |
| #include <smpp34.h> |
| #include <smpp34_structs.h> |
| #include <smpp34_params.h> |
| |
| #include <osmocom/core/utils.h> |
| #include <osmocom/core/socket.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/core/write_queue.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/gsm/protocol/gsm_04_11.h> |
| |
| #include <osmocom/msc/debug.h> |
| #include <osmocom/msc/gsm_data.h> |
| #include <osmocom/smpp/smpp_smsc.h> |
| |
| enum emse_bind { |
| ESME_BIND_RX = 0x01, |
| ESME_BIND_TX = 0x02, |
| }; |
| |
| const struct value_string smpp_status_strs[] = { |
| { ESME_ROK, "No Error" }, |
| { ESME_RINVMSGLEN, "Message Length is invalid" }, |
| { ESME_RINVCMDLEN, "Command Length is invalid" }, |
| { ESME_RINVCMDID, "Invalid Command ID" }, |
| { ESME_RINVBNDSTS, "Incorrect BIND Status for given command" }, |
| { ESME_RALYBND, "ESME Already in Bound State" }, |
| { ESME_RINVPRTFLG, "Invalid Priority Flag" }, |
| { ESME_RINVREGDLVFLG, "Invalid Registered Delivery Flag" }, |
| { ESME_RSYSERR, "System Error" }, |
| { ESME_RINVSRCADR, "Invalid Source Address" }, |
| { ESME_RINVDSTADR, "Invalid Destination Address" }, |
| { ESME_RINVMSGID, "Message ID is invalid" }, |
| { ESME_RBINDFAIL, "Bind failed" }, |
| { ESME_RINVPASWD, "Invalid Password" }, |
| { ESME_RINVSYSID, "Invalid System ID" }, |
| { ESME_RCANCELFAIL, "Cancel SM Failed" }, |
| { ESME_RREPLACEFAIL, "Replace SM Failed" }, |
| { ESME_RMSGQFUL, "Message Queue Full" }, |
| { ESME_RINVSERTYP, "Invalid Service Type" }, |
| { ESME_RINVNUMDESTS, "Invalid number of destinations" }, |
| { ESME_RINVDLNAME, "Invalid Distribution List name" }, |
| { ESME_RINVDESTFLAG, "Destination flag is invalid" }, |
| { ESME_RINVSUBREP, "Invalid submit with replace request" }, |
| { ESME_RINVESMCLASS, "Invalid esm_class field data" }, |
| { ESME_RCNTSUBDL, "Cannot Submit to Distribution List" }, |
| { ESME_RSUBMITFAIL, "submit_sm or submit_multi failed" }, |
| { ESME_RINVSRCTON, "Invalid Source address TON" }, |
| { ESME_RINVSRCNPI, "Invalid Sourec address NPI" }, |
| { ESME_RINVDSTTON, "Invalid Destination address TON" }, |
| { ESME_RINVDSTNPI, "Invalid Desetination address NPI" }, |
| { ESME_RINVSYSTYP, "Invalid system_type field" }, |
| { ESME_RINVREPFLAG, "Invalid replace_if_present field" }, |
| { ESME_RINVNUMMSGS, "Invalid number of messages" }, |
| { ESME_RTHROTTLED, "Throttling error (ESME has exceeded message limits)" }, |
| { ESME_RINVSCHED, "Invalid Scheduled Delivery Time" }, |
| { ESME_RINVEXPIRY, "Invalid message validity period (Expiry time)" }, |
| { ESME_RINVDFTMSGID, "Predefined Message Invalid or Not Found" }, |
| { ESME_RX_T_APPN, "ESME Receiver Temporary App Error Code" }, |
| { ESME_RX_P_APPN, "ESME Receiver Permanent App Error Code" }, |
| { ESME_RX_R_APPN, "ESME Receiver Reject Message Error Code" }, |
| { ESME_RQUERYFAIL, "query_sm request failed" }, |
| { ESME_RINVOPTPARSTREAM,"Error in the optional part of the PDU Body" }, |
| { ESME_ROPTPARNOTALLWD, "Optional Parameter not allowed" }, |
| { ESME_RINVPARLEN, "Invalid Parameter Length" }, |
| { ESME_RMISSINGOPTPARAM,"Expected Optional Parameter missing" }, |
| { ESME_RINVOPTPARAMVAL, "Invalid Optional Parameter Value" }, |
| { ESME_RDELIVERYFAILURE,"Delivery Failure (used for data_sm_resp)" }, |
| { ESME_RUNKNOWNERR, "Unknown Error" }, |
| { 0, NULL } |
| }; |
| |
| /*! \brief compare if two SMPP addresses are equal */ |
| int smpp_addr_eq(const struct osmo_smpp_addr *a, |
| const struct osmo_smpp_addr *b) |
| { |
| if (a->ton == b->ton && |
| a->npi == b->npi && |
| !strcmp(a->addr, b->addr)) |
| return 1; |
| |
| return 0; |
| } |
| |
| |
| struct osmo_smpp_acl *smpp_acl_by_system_id(struct smsc *smsc, |
| const char *sys_id) |
| { |
| struct osmo_smpp_acl *acl; |
| |
| llist_for_each_entry(acl, &smsc->acl_list, list) { |
| if (!strcmp(acl->system_id, sys_id)) |
| return acl; |
| } |
| |
| return NULL; |
| } |
| |
| struct osmo_smpp_acl *smpp_acl_alloc(struct smsc *smsc, const char *sys_id) |
| { |
| struct osmo_smpp_acl *acl; |
| |
| if (strlen(sys_id) > SMPP_SYS_ID_LEN) |
| return NULL; |
| |
| if (smpp_acl_by_system_id(smsc, sys_id)) |
| return NULL; |
| |
| acl = talloc_zero(smsc, struct osmo_smpp_acl); |
| if (!acl) |
| return NULL; |
| |
| acl->smsc = smsc; |
| strcpy(acl->system_id, sys_id); |
| acl->alert_notifications = 1; |
| INIT_LLIST_HEAD(&acl->route_list); |
| |
| llist_add_tail(&acl->list, &smsc->acl_list); |
| |
| return acl; |
| } |
| |
| void smpp_acl_delete(struct osmo_smpp_acl *acl) |
| { |
| struct osmo_smpp_route *r, *r2; |
| |
| llist_del(&acl->list); |
| |
| /* kill any active ESMEs */ |
| if (acl->esme) { |
| struct esme *esme = acl->esme->esme; |
| osmo_fd_unregister(&esme->wqueue.bfd); |
| close(esme->wqueue.bfd.fd); |
| esme->wqueue.bfd.fd = -1; |
| smpp_esme_put(acl->esme); |
| acl->esme = NULL; |
| } |
| |
| /* delete all routes for this ACL */ |
| llist_for_each_entry_safe(r, r2, &acl->route_list, list) { |
| llist_del(&r->list); |
| llist_del(&r->global_list); |
| talloc_free(r); |
| } |
| |
| talloc_free(acl); |
| } |
| |
| static struct osmo_smpp_route *route_alloc(struct osmo_smpp_acl *acl) |
| { |
| struct osmo_smpp_route *r; |
| |
| r = talloc_zero(acl, struct osmo_smpp_route); |
| if (!r) |
| return NULL; |
| |
| llist_add_tail(&r->list, &acl->route_list); |
| llist_add_tail(&r->global_list, &acl->smsc->route_list); |
| |
| return r; |
| } |
| |
| int smpp_route_pfx_add(struct osmo_smpp_acl *acl, |
| const struct osmo_smpp_addr *pfx) |
| { |
| struct osmo_smpp_route *r; |
| |
| llist_for_each_entry(r, &acl->route_list, list) { |
| if (r->type == SMPP_ROUTE_PREFIX && |
| smpp_addr_eq(&r->u.prefix, pfx)) |
| return -EEXIST; |
| } |
| |
| r = route_alloc(acl); |
| if (!r) |
| return -ENOMEM; |
| r->type = SMPP_ROUTE_PREFIX; |
| r->acl = acl; |
| memcpy(&r->u.prefix, pfx, sizeof(r->u.prefix)); |
| |
| return 0; |
| } |
| |
| int smpp_route_pfx_del(struct osmo_smpp_acl *acl, |
| const struct osmo_smpp_addr *pfx) |
| { |
| struct osmo_smpp_route *r, *r2; |
| |
| llist_for_each_entry_safe(r, r2, &acl->route_list, list) { |
| if (r->type == SMPP_ROUTE_PREFIX && |
| smpp_addr_eq(&r->u.prefix, pfx)) { |
| llist_del(&r->list); |
| talloc_free(r); |
| return 0; |
| } |
| } |
| |
| return -ENODEV; |
| } |
| |
| |
| /*! \brief increaes the use/reference count */ |
| void smpp_esme_get(struct smpp_esme *esme) |
| { |
| esme->use++; |
| } |
| |
| static void esme_destroy(struct smpp_esme *esme) |
| { |
| osmo_wqueue_clear(&esme->esme->wqueue); |
| if (esme->esme->wqueue.bfd.fd >= 0) { |
| osmo_fd_unregister(&esme->esme->wqueue.bfd); |
| close(esme->esme->wqueue.bfd.fd); |
| } |
| smpp_cmd_flush_pending(esme); |
| llist_del(&esme->list); |
| if (esme->acl) |
| esme->acl->esme = NULL; |
| talloc_free(esme); |
| } |
| |
| uint32_t esme_inc_seq_nr(struct esme *esme) |
| { |
| esme->own_seq_nr++; |
| if (esme->own_seq_nr > 0x7fffffff) |
| esme->own_seq_nr = 1; |
| |
| return esme->own_seq_nr; |
| } |
| |
| /*! \brief decrease the use/reference count, free if it is 0 */ |
| void smpp_esme_put(struct smpp_esme *esme) |
| { |
| esme->use--; |
| if (esme->use <= 0) |
| esme_destroy(esme); |
| } |
| |
| /*! \brief try to find a SMPP route (ESME) for given destination */ |
| int smpp_route(const struct smsc *smsc, const struct osmo_smpp_addr *dest, struct smpp_esme **pesme) |
| { |
| struct osmo_smpp_route *r; |
| struct osmo_smpp_acl *acl = NULL; |
| |
| DEBUGP(DSMPP, "Looking up route for (%u/%u/%s)\n", |
| dest->ton, dest->npi, dest->addr); |
| |
| /* search for a specific route */ |
| llist_for_each_entry(r, &smsc->route_list, global_list) { |
| switch (r->type) { |
| case SMPP_ROUTE_PREFIX: |
| DEBUGP(DSMPP, "Checking prefix route (%u/%u/%s)->%s\n", |
| r->u.prefix.ton, r->u.prefix.npi, r->u.prefix.addr, |
| r->acl->system_id); |
| if (r->u.prefix.ton == dest->ton && |
| r->u.prefix.npi == dest->npi && |
| !strncmp(r->u.prefix.addr, dest->addr, |
| strlen(r->u.prefix.addr))) { |
| DEBUGP(DSMPP, "Found prefix route ACL\n"); |
| acl = r->acl; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| if (acl) |
| break; |
| } |
| |
| if (!acl) { |
| /* check for default route */ |
| if (smsc->def_route) { |
| DEBUGP(DSMPP, "Using existing default route\n"); |
| acl = smsc->def_route; |
| } |
| } |
| |
| if (acl && acl->esme) { |
| struct smpp_esme *esme; |
| DEBUGP(DSMPP, "ACL even has ESME, we can route to it!\n"); |
| esme = acl->esme; |
| if (esme->bind_flags & ESME_BIND_RX) { |
| *pesme = esme; |
| return 0; |
| } else |
| LOGPESME(esme->esme, LOGL_NOTICE, "is matching route, but not bound for Rx, discarding MO SMS\n"); |
| } |
| |
| *pesme = NULL; |
| if (acl) |
| return GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER; |
| else |
| return GSM411_RP_CAUSE_MO_NUM_UNASSIGNED; |
| } |
| |
| /*! \brief pack a libsmpp34 data strcutrure and send it to the ESME */ |
| int pack_and_send(struct esme *esme, uint32_t type, void *ptr) |
| { |
| struct msgb *msg; |
| int rc, rlen; |
| |
| /* the socket was closed. Avoid allocating + enqueueing msgb, see |
| * https://osmocom.org/issues/3278 */ |
| if (esme->wqueue.bfd.fd == -1) |
| return -EIO; |
| |
| msg = msgb_alloc(4096, "SMPP_Tx"); |
| if (!msg) |
| return -ENOMEM; |
| |
| rc = smpp34_pack(type, msg->tail, msgb_tailroom(msg), &rlen, ptr); |
| if (rc != 0) { |
| LOGPESMERR(esme, "during smpp34_pack()\n"); |
| msgb_free(msg); |
| return -EINVAL; |
| } |
| msgb_put(msg, rlen); |
| |
| if (osmo_wqueue_enqueue(&esme->wqueue, msg) != 0) { |
| LOGPESME(esme, LOGL_ERROR, "Write queue full. Dropping message\n"); |
| msgb_free(msg); |
| return -EAGAIN; |
| } |
| return 0; |
| } |
| |
| /*! \brief transmit a generic NACK to a remote ESME */ |
| static int smpp_tx_gen_nack(struct esme *esme, uint32_t seq, uint32_t status) |
| { |
| struct generic_nack_t nack; |
| char buf[SMALL_BUFF]; |
| |
| nack.command_length = 0; |
| nack.command_id = GENERIC_NACK; |
| nack.sequence_number = seq; |
| nack.command_status = status; |
| |
| LOGPESME(esme, LOGL_ERROR, "Tx GENERIC NACK: %s\n", str_command_status(status, buf)); |
| |
| return PACK_AND_SEND(esme, &nack); |
| } |
| |
| /*! \brief retrieve SMPP sequence number from a msgb */ |
| static inline uint32_t smpp_msgb_seq(struct msgb *msg) |
| { |
| uint8_t *tmp = msgb_data(msg); |
| return ntohl(*(uint32_t *)tmp); |
| } |
| |
| /*! \brief handle an incoming SMPP generic NACK */ |
| static int smpp_handle_gen_nack(struct esme *esme, struct msgb *msg) |
| { |
| struct generic_nack_t nack; |
| char buf[SMALL_BUFF]; |
| int rc; |
| |
| SMPP34_UNPACK(rc, GENERIC_NACK, &nack, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| LOGPESME(esme, LOGL_ERROR, "Rx GENERIC NACK: %s\n", str_command_status(nack.command_status, buf)); |
| |
| return 0; |
| } |
| |
| static int _process_bind(struct smpp_esme *esme, uint8_t if_version, |
| uint32_t bind_flags, const char *sys_id, |
| const char *passwd) |
| { |
| struct osmo_smpp_acl *acl; |
| |
| if (if_version != SMPP_VERSION) |
| return ESME_RSYSERR; |
| |
| if (esme->bind_flags) |
| return ESME_RALYBND; |
| |
| esme->smpp_version = if_version; |
| snprintf(esme->esme->system_id, sizeof(esme->esme->system_id), "%s", sys_id); |
| |
| acl = smpp_acl_by_system_id(esme->smsc, esme->esme->system_id); |
| if (!esme->smsc->accept_all) { |
| if (!acl) { |
| /* This system is unknown */ |
| return ESME_RINVSYSID; |
| } else { |
| if (strlen(acl->passwd) && |
| strcmp(acl->passwd, passwd)) { |
| return ESME_RINVPASWD; |
| } |
| } |
| } |
| if (acl) { |
| esme->acl = acl; |
| acl->esme = esme; |
| } |
| |
| esme->bind_flags = bind_flags; |
| |
| return ESME_ROK; |
| } |
| |
| |
| /*! \brief handle an incoming SMPP BIND RECEIVER */ |
| static int smpp_handle_bind_rx(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct bind_receiver_t bind; |
| struct bind_receiver_resp_t bind_r; |
| int rc; |
| |
| SMPP34_UNPACK(rc, BIND_RECEIVER, &bind, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); |
| |
| LOGP(DSMPP, LOGL_INFO, "[%s] Rx BIND Rx from (Version %02x)\n", |
| bind.system_id, bind.interface_version); |
| |
| rc = _process_bind(esme, bind.interface_version, ESME_BIND_RX, |
| (const char *)bind.system_id, (const char *)bind.password); |
| bind_r.command_status = rc; |
| |
| return PACK_AND_SEND(esme->esme, &bind_r); |
| } |
| |
| /*! \brief handle an incoming SMPP BIND TRANSMITTER */ |
| static int smpp_handle_bind_tx(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct bind_transmitter_t bind; |
| struct bind_transmitter_resp_t bind_r; |
| struct tlv_t tlv = {}; |
| int rc; |
| |
| SMPP34_UNPACK(rc, BIND_TRANSMITTER, &bind, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); |
| |
| LOGP(DSMPP, LOGL_INFO, "[%s] Rx BIND Tx (Version %02x)\n", |
| bind.system_id, bind.interface_version); |
| |
| rc = _process_bind(esme, bind.interface_version, ESME_BIND_TX, |
| (const char *)bind.system_id, (const char *)bind.password); |
| bind_r.command_status = rc; |
| |
| /* build response */ |
| osmo_strlcpy((char*)bind_r.system_id, esme->smsc->system_id, sizeof(bind_r.system_id)); |
| |
| /* add interface version TLV */ |
| tlv.tag = TLVID_sc_interface_version; |
| tlv.length = sizeof(uint8_t); |
| tlv.value.val16 = esme->smpp_version; |
| build_tlv(&bind_r.tlv, &tlv); |
| |
| rc = PACK_AND_SEND(esme->esme, &bind_r); |
| destroy_tlv(bind_r.tlv); |
| return rc; |
| } |
| |
| /*! \brief handle an incoming SMPP BIND TRANSCEIVER */ |
| static int smpp_handle_bind_trx(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct bind_transceiver_t bind; |
| struct bind_transceiver_resp_t bind_r; |
| int rc; |
| |
| SMPP34_UNPACK(rc, BIND_TRANSCEIVER, &bind, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| INIT_RESP(BIND_TRANSCEIVER_RESP, &bind_r, &bind); |
| |
| LOGP(DSMPP, LOGL_INFO, "[%s] Rx BIND Trx (Version %02x)\n", |
| bind.system_id, bind.interface_version); |
| |
| rc = _process_bind(esme, bind.interface_version, ESME_BIND_RX|ESME_BIND_TX, |
| (const char *)bind.system_id, (const char *)bind.password); |
| bind_r.command_status = rc; |
| |
| return PACK_AND_SEND(esme->esme, &bind_r); |
| } |
| |
| /*! \brief handle an incoming SMPP UNBIND */ |
| static int smpp_handle_unbind(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct unbind_t unbind; |
| struct unbind_resp_t unbind_r; |
| int rc; |
| |
| SMPP34_UNPACK(rc, UNBIND, &unbind, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| INIT_RESP(UNBIND_RESP, &unbind_r, &unbind); |
| |
| LOGPESME(esme->esme, LOGL_INFO, "Rx UNBIND\n"); |
| |
| if (esme->bind_flags == 0) { |
| unbind_r.command_status = ESME_RINVBNDSTS; |
| goto err; |
| } |
| |
| esme->bind_flags = 0; |
| err: |
| return PACK_AND_SEND(esme->esme, &unbind_r); |
| } |
| |
| /*! \brief handle an incoming SMPP ENQUIRE LINK */ |
| static int smpp_handle_enq_link(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct enquire_link_t enq; |
| struct enquire_link_resp_t enq_r; |
| int rc; |
| |
| SMPP34_UNPACK(rc, ENQUIRE_LINK, &enq, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| LOGPESME(esme->esme, LOGL_DEBUG, "Rx Enquire Link\n"); |
| |
| INIT_RESP(ENQUIRE_LINK_RESP, &enq_r, &enq); |
| |
| LOGPESME(esme->esme, LOGL_DEBUG, "Tx Enquire Link Response\n"); |
| |
| return PACK_AND_SEND(esme->esme, &enq_r); |
| } |
| |
| /*! \brief send a SUBMIT-SM RESPONSE to a remote ESME */ |
| int smpp_tx_submit_r(struct smpp_esme *esme, uint32_t sequence_nr, |
| uint32_t command_status, char *msg_id) |
| { |
| struct submit_sm_resp_t submit_r; |
| |
| memset(&submit_r, 0, sizeof(submit_r)); |
| submit_r.command_length = 0; |
| submit_r.command_id = SUBMIT_SM_RESP; |
| submit_r.command_status = command_status; |
| submit_r.sequence_number= sequence_nr; |
| snprintf((char *) submit_r.message_id, sizeof(submit_r.message_id), "%s", msg_id); |
| |
| return PACK_AND_SEND(esme->esme, &submit_r); |
| } |
| |
| static const struct value_string smpp_avail_strs[] = { |
| { 0, "Available" }, |
| { 1, "Denied" }, |
| { 2, "Unavailable" }, |
| { 0, NULL } |
| }; |
| |
| /*! \brief send an ALERT_NOTIFICATION to a remote ESME */ |
| int smpp_tx_alert(struct smpp_esme *esme, uint8_t ton, uint8_t npi, |
| const char *addr, uint8_t avail_status) |
| { |
| struct alert_notification_t alert; |
| struct tlv_t tlv; |
| int rc; |
| |
| memset(&alert, 0, sizeof(alert)); |
| alert.command_length = 0; |
| alert.command_id = ALERT_NOTIFICATION; |
| alert.command_status = ESME_ROK; |
| alert.sequence_number = esme_inc_seq_nr(esme->esme); |
| alert.source_addr_ton = ton; |
| alert.source_addr_npi = npi; |
| snprintf((char *)alert.source_addr, sizeof(alert.source_addr), "%s", addr); |
| |
| tlv.tag = TLVID_ms_availability_status; |
| tlv.length = sizeof(uint8_t); |
| tlv.value.val08 = avail_status; |
| build_tlv(&alert.tlv, &tlv); |
| |
| LOGPESME(esme->esme, LOGL_DEBUG, "Tx ALERT_NOTIFICATION (%s/%u/%u): %s\n", |
| alert.source_addr, alert.source_addr_ton, |
| alert.source_addr_npi, |
| get_value_string(smpp_avail_strs, avail_status)); |
| |
| rc = PACK_AND_SEND(esme->esme, &alert); |
| destroy_tlv(alert.tlv); |
| return rc; |
| } |
| |
| /* \brief send a DELIVER-SM message to given ESME */ |
| int smpp_tx_deliver(struct smpp_esme *esme, struct deliver_sm_t *deliver) |
| { |
| deliver->sequence_number = esme_inc_seq_nr(esme->esme); |
| |
| LOGPESME(esme->esme, LOGL_DEBUG, "Tx DELIVER-SM (from %s)\n", deliver->source_addr); |
| |
| return PACK_AND_SEND(esme->esme, deliver); |
| } |
| |
| /*! \brief handle an incoming SMPP DELIVER-SM RESPONSE */ |
| static int smpp_handle_deliver_resp(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct deliver_sm_resp_t deliver_r; |
| struct osmo_smpp_cmd *cmd; |
| int rc; |
| |
| memset(&deliver_r, 0, sizeof(deliver_r)); |
| SMPP34_UNPACK(rc, DELIVER_SM_RESP, &deliver_r, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| cmd = smpp_cmd_find_by_seqnum(esme, deliver_r.sequence_number); |
| if (!cmd) { |
| LOGPESME(esme->esme, LOGL_ERROR, "Rx DELIVER-SM RESP !? (%s)\n", |
| get_value_string(smpp_status_strs, deliver_r.command_status)); |
| return -1; |
| } |
| |
| if (deliver_r.command_status == ESME_ROK) |
| smpp_cmd_ack(cmd); |
| else |
| smpp_cmd_err(cmd, deliver_r.command_status); |
| |
| LOGPESME(esme->esme, LOGL_INFO, "Rx DELIVER-SM RESP (%s)\n", |
| get_value_string(smpp_status_strs, deliver_r.command_status)); |
| |
| return 0; |
| } |
| |
| /*! \brief handle an incoming SMPP SUBMIT-SM */ |
| static int smpp_handle_submit(struct smpp_esme *esme, struct msgb *msg) |
| { |
| struct submit_sm_t submit; |
| struct submit_sm_resp_t submit_r; |
| int rc; |
| |
| memset(&submit, 0, sizeof(submit)); |
| SMPP34_UNPACK(rc, SUBMIT_SM, &submit, msgb_data(msg), |
| msgb_length(msg)); |
| if (rc < 0) { |
| LOGPESMERR(esme->esme, "in smpp34_unpack()\n"); |
| return rc; |
| } |
| |
| INIT_RESP(SUBMIT_SM_RESP, &submit_r, &submit); |
| |
| if (!(esme->bind_flags & ESME_BIND_TX)) { |
| submit_r.command_status = ESME_RINVBNDSTS; |
| destroy_tlv(submit.tlv); |
| return PACK_AND_SEND(esme->esme, &submit_r); |
| } |
| |
| LOGPESME(esme->esme, LOGL_INFO, "Rx SUBMIT-SM (%s/%u/%u)\n", |
| submit.destination_addr, submit.dest_addr_ton, submit.dest_addr_npi); |
| |
| INIT_RESP(SUBMIT_SM_RESP, &submit_r, &submit); |
| |
| rc = handle_smpp_submit(esme, &submit, &submit_r); |
| destroy_tlv(submit.tlv); |
| if (rc == 0) |
| return PACK_AND_SEND(esme->esme, &submit_r); |
| |
| return rc; |
| } |
| |
| /*! \brief one complete SMPP PDU from the ESME has been received */ |
| static int smpp_pdu_rx(struct smpp_esme *esme, struct msgb *msg __uses) |
| { |
| uint32_t cmd_id = smpp_msgb_cmdid(msg); |
| int rc = 0; |
| |
| LOGPESME(esme->esme, LOGL_DEBUG, "smpp_pdu_rx(%s)\n", msgb_hexdump(msg)); |
| |
| switch (cmd_id) { |
| case GENERIC_NACK: |
| rc = smpp_handle_gen_nack(esme->esme, msg); |
| break; |
| case BIND_RECEIVER: |
| rc = smpp_handle_bind_rx(esme, msg); |
| break; |
| case BIND_TRANSMITTER: |
| rc = smpp_handle_bind_tx(esme, msg); |
| break; |
| case BIND_TRANSCEIVER: |
| rc = smpp_handle_bind_trx(esme, msg); |
| break; |
| case UNBIND: |
| rc = smpp_handle_unbind(esme, msg); |
| break; |
| case ENQUIRE_LINK: |
| rc = smpp_handle_enq_link(esme, msg); |
| break; |
| case SUBMIT_SM: |
| rc = smpp_handle_submit(esme, msg); |
| break; |
| case DELIVER_SM_RESP: |
| rc = smpp_handle_deliver_resp(esme, msg); |
| break; |
| case DELIVER_SM: |
| break; |
| case DATA_SM: |
| break; |
| case CANCEL_SM: |
| case QUERY_SM: |
| case REPLACE_SM: |
| case SUBMIT_MULTI: |
| LOGPESME(esme->esme, LOGL_NOTICE, "Unimplemented PDU Command 0x%08x\n", cmd_id); |
| break; |
| default: |
| LOGPESME(esme->esme, LOGL_ERROR, "Unknown PDU Command 0x%08x\n", cmd_id); |
| rc = smpp_tx_gen_nack(esme->esme, smpp_msgb_seq(msg), ESME_RINVCMDID); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /* This macro should be called after a call to read() in the read_cb of an |
| * osmo_fd to properly check for errors. |
| * rc is the return value of read, err_label is the label to jump to in case of |
| * an error. The code there should handle closing the connection. |
| * FIXME: This code should go in libosmocore utils.h so it can be used by other |
| * projects as well. |
| * */ |
| #define OSMO_FD_CHECK_READ(rc, err_label) \ |
| if (rc < 0) { \ |
| /* EINTR is a non-fatal error, just try again */ \ |
| if (errno == EINTR) \ |
| return 0; \ |
| goto err_label; \ |
| } else if (rc == 0) { \ |
| goto err_label; \ |
| } |
| |
| /* !\brief call-back when per-ESME TCP socket has some data to be read */ |
| static int esme_link_read_cb(struct osmo_fd *ofd) |
| { |
| struct smpp_esme *e = ofd->data; |
| struct esme *esme = e->esme; |
| uint32_t len; |
| uint8_t *lenptr = (uint8_t *) &len; |
| uint8_t *cur; |
| struct msgb *msg; |
| ssize_t rdlen, rc; |
| |
| switch (esme->read_state) { |
| case READ_ST_IN_LEN: |
| rdlen = sizeof(uint32_t) - esme->read_idx; |
| rc = read(ofd->fd, lenptr + esme->read_idx, rdlen); |
| if (rc < 0) |
| LOGPESME(esme, LOGL_ERROR, "read returned %zd (%s)\n", rc, strerror(errno)); |
| OSMO_FD_CHECK_READ(rc, dead_socket); |
| |
| esme->read_idx += rc; |
| |
| if (esme->read_idx >= sizeof(uint32_t)) { |
| esme->read_len = ntohl(len); |
| if (esme->read_len < 8 || esme->read_len > UINT16_MAX) { |
| LOGPESME(esme, LOGL_ERROR, "length invalid %u\n", esme->read_len); |
| goto dead_socket; |
| } |
| |
| msg = msgb_alloc(esme->read_len, "SMPP Rx"); |
| if (!msg) |
| return -ENOMEM; |
| esme->read_msg = msg; |
| cur = msgb_put(msg, sizeof(uint32_t)); |
| memcpy(cur, lenptr, sizeof(uint32_t)); |
| esme->read_state = READ_ST_IN_MSG; |
| esme->read_idx = sizeof(uint32_t); |
| } |
| break; |
| case READ_ST_IN_MSG: |
| msg = esme->read_msg; |
| rdlen = esme->read_len - esme->read_idx; |
| rc = read(ofd->fd, msg->tail, OSMO_MIN(rdlen, msgb_tailroom(msg))); |
| if (rc < 0) |
| LOGPESME(esme, LOGL_ERROR, "read returned %zd (%s)\n", |
| rc, strerror(errno)); |
| OSMO_FD_CHECK_READ(rc, dead_socket); |
| |
| esme->read_idx += rc; |
| msgb_put(msg, rc); |
| |
| if (esme->read_idx >= esme->read_len) { |
| rc = smpp_pdu_rx(e, esme->read_msg); |
| msgb_free(esme->read_msg); |
| esme->read_msg = NULL; |
| esme->read_idx = 0; |
| esme->read_len = 0; |
| esme->read_state = READ_ST_IN_LEN; |
| } |
| break; |
| } |
| |
| return 0; |
| dead_socket: |
| msgb_free(esme->read_msg); |
| osmo_fd_unregister(&esme->wqueue.bfd); |
| close(esme->wqueue.bfd.fd); |
| esme->wqueue.bfd.fd = -1; |
| if (e->acl) |
| e->acl->esme = NULL; |
| smpp_esme_put(e); |
| |
| return -EBADF; |
| } |
| |
| /* call-back of write queue once it wishes to write a message to the socket */ |
| static int esme_link_write_cb(struct osmo_fd *ofd, struct msgb *msg) |
| { |
| struct smpp_esme *esme = ofd->data; |
| int rc; |
| |
| rc = write(ofd->fd, msgb_data(msg), msgb_length(msg)); |
| if (rc == 0) { |
| osmo_fd_unregister(&esme->esme->wqueue.bfd); |
| close(esme->esme->wqueue.bfd.fd); |
| esme->esme->wqueue.bfd.fd = -1; |
| if (esme->acl) |
| esme->acl->esme = NULL; |
| smpp_esme_put(esme); |
| } else if (rc < msgb_length(msg)) { |
| LOGPESME(esme->esme, LOGL_ERROR, "Short write\n"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| struct esme *esme_alloc(void *ctx) |
| { |
| struct esme *e = talloc_zero(ctx, struct esme); |
| if (!e) |
| return NULL; |
| |
| e->own_seq_nr = rand(); |
| esme_inc_seq_nr(e); |
| osmo_wqueue_init(&e->wqueue, 10); |
| |
| return e; |
| } |
| |
| /* callback for already-accepted new TCP socket */ |
| static int link_accept_cb(struct smsc *smsc, int fd, |
| struct sockaddr_storage *s, socklen_t s_len) |
| { |
| struct smpp_esme *esme = talloc_zero(smsc, struct smpp_esme); |
| if (!esme) { |
| close(fd); |
| return -ENOMEM; |
| } |
| |
| esme->esme = esme_alloc(esme); |
| if (!esme->esme) { |
| close(fd); |
| return -ENOMEM; |
| } |
| |
| INIT_LLIST_HEAD(&esme->smpp_cmd_list); |
| smpp_esme_get(esme); |
| esme->smsc = smsc; |
| osmo_fd_setup(&esme->esme->wqueue.bfd, fd, OSMO_FD_READ, osmo_wqueue_bfd_cb, esme, 0); |
| |
| if (osmo_fd_register(&esme->esme->wqueue.bfd) != 0) { |
| close(fd); |
| talloc_free(esme); |
| return -EIO; |
| } |
| |
| esme->esme->wqueue.read_cb = esme_link_read_cb; |
| esme->esme->wqueue.write_cb = esme_link_write_cb; |
| |
| llist_add_tail(&esme->list, &smsc->esme_list); |
| |
| return 0; |
| } |
| |
| /* callback of listening TCP socket */ |
| static int smsc_fd_cb(struct osmo_fd *ofd, unsigned int what) |
| { |
| int rc; |
| struct sockaddr_storage sa; |
| socklen_t sa_len = sizeof(sa); |
| |
| rc = accept(ofd->fd, (struct sockaddr *)&sa, &sa_len); |
| if (rc < 0) { |
| LOGP(DSMPP, LOGL_ERROR, "Accept returns %d (%s)\n", |
| rc, strerror(errno)); |
| return rc; |
| } |
| return link_accept_cb(ofd->data, rc, &sa, sa_len); |
| } |
| |
| /*! \brief allocate and initialize an smsc struct from talloc context ctx. */ |
| struct smsc *smpp_smsc_alloc_init(void *ctx) |
| { |
| struct smsc *smsc = talloc_zero(ctx, struct smsc); |
| |
| INIT_LLIST_HEAD(&smsc->esme_list); |
| INIT_LLIST_HEAD(&smsc->acl_list); |
| INIT_LLIST_HEAD(&smsc->route_list); |
| |
| smsc->listen_ofd.data = smsc; |
| smsc->listen_ofd.cb = smsc_fd_cb; |
| |
| return smsc; |
| } |
| |
| /*! \brief Set the SMPP address and port without binding. */ |
| int smpp_smsc_conf(struct smsc *smsc, const char *bind_addr, uint16_t port) |
| { |
| smsc->listen_port = port; |
| |
| /* Avoid use-after-free if bind_addr == smsc->bind_addr */ |
| if (smsc->bind_addr == bind_addr) |
| return 0; |
| osmo_talloc_replace_string(smsc, &smsc->bind_addr, bind_addr); |
| |
| return 0; |
| } |
| |
| /*! /brief Close SMPP connection. */ |
| static void smpp_smsc_stop(struct smsc *smsc) |
| { |
| if (smsc->listen_ofd.fd > 0) { |
| close(smsc->listen_ofd.fd); |
| smsc->listen_ofd.fd = 0; |
| osmo_fd_unregister(&smsc->listen_ofd); |
| } |
| } |
| |
| /*! \brief Bind to given address and port and accept connections. |
| * \param[in] bind_addr Local IP address, may be NULL for any. |
| * \param[in] port TCP port number, may be 0 for default SMPP (2775). |
| */ |
| int smpp_smsc_start(struct smsc *smsc, const char *bind_addr, uint16_t port) |
| { |
| int rc; |
| |
| LOGP(DSMPP, LOGL_NOTICE, "SMPP at %s %d\n", |
| bind_addr ? bind_addr : "0.0.0.0", port ? port : SMPP_PORT); |
| |
| rc = osmo_sock_init_ofd(&smsc->listen_ofd, AF_UNSPEC, SOCK_STREAM, |
| IPPROTO_TCP, bind_addr, port ? port : SMPP_PORT, |
| OSMO_SOCK_F_BIND); |
| if (rc < 0) |
| return rc; |
| |
| /* store new address and port */ |
| rc = smpp_smsc_conf(smsc, bind_addr, port ? port : SMPP_PORT); |
| if (rc) |
| smpp_smsc_stop(smsc); |
| return rc; |
| } |
| |
| /*! \brief Change a running connection to a different address/port, and upon |
| * error switch back to the running configuration. */ |
| int smpp_smsc_restart(struct smsc *smsc, const char *bind_addr, uint16_t port) |
| { |
| int rc; |
| |
| smpp_smsc_stop(smsc); |
| |
| rc = smpp_smsc_start(smsc, bind_addr, port); |
| if (rc) |
| /* if there is an error, try to re-bind to the old port */ |
| return smpp_smsc_start(smsc, smsc->bind_addr, smsc->listen_port); |
| return 0; |
| } |