From a52c99e9e699f5ad264908bf9b19e349c4bcfd9e Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Fri, 9 Nov 2012 09:00:50 +0100 Subject: add missing C files for running a small SMSC-side SMPP implementation --- test_apps/smpp_smsc.c | 573 ++++++++++++++++++++++++++++++++++++++++++++++++++ test_apps/smpp_smsc.h | 60 ++++++ test_apps/smsc_main.c | 47 +++++ 3 files changed, 680 insertions(+) create mode 100644 test_apps/smpp_smsc.c create mode 100644 test_apps/smpp_smsc.h create mode 100644 test_apps/smsc_main.c diff --git a/test_apps/smpp_smsc.c b/test_apps/smpp_smsc.c new file mode 100644 index 0000000..7312980 --- /dev/null +++ b/test_apps/smpp_smsc.c @@ -0,0 +1,573 @@ +/* SMPP 3.4 interface, SMSC-side implementation */ +/* (C) 2012 by Harald Welte + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "smpp_smsc.h" + +#define DSMPP 1 + +/*! \brief Ugly wrapper. libsmpp34 should do this itself! */ +#define SMPP34_UNPACK(rc, type, str, data, len) \ + memset(str, 0, sizeof(*str)); \ + rc = smpp34_unpack(type, str, data, len) + +enum emse_bind { + ESME_BIND_RX = 0x01, + ESME_BIND_TX = 0x02, +}; + +/*! \brief increaes the use/reference count */ +void smpp_esme_get(struct osmo_esme *esme) +{ + esme->use++; +} + +static void esme_destroy(struct osmo_esme *esme) +{ + osmo_wqueue_clear(&esme->wqueue); + if (esme->wqueue.bfd.fd >= 0) { + osmo_fd_unregister(&esme->wqueue.bfd); + close(esme->wqueue.bfd.fd); + } + llist_del(&esme->list); + talloc_free(esme); +} + +/*! \brief decrease the use/reference count, free if it is 0 */ +void smpp_esme_put(struct osmo_esme *esme) +{ + esme->use--; + if (esme->use <= 0) + esme_destroy(esme); +} + +static struct osmo_esme * +esme_by_system_id(const struct smsc *smsc, char *system_id) +{ + struct osmo_esme *e; + + llist_for_each_entry(e, &smsc->esme_list, list) { + if (!strcmp(e->system_id, system_id)) + return e; + } + return NULL; +} + + +/*! \brief initialize the libsmpp34 data structure for a response */ +#define INIT_RESP(type, resp, req) { \ + memset((resp), 0, sizeof(*(resp))); \ + (resp)->command_length = 0; \ + (resp)->command_id = type; \ + (resp)->command_status = ESME_ROK; \ + (resp)->sequence_number = (req)->sequence_number; \ +} + +/*! \brief pack a libsmpp34 data strcutrure and send it to the ESME */ +#define PACK_AND_SEND(esme, ptr) pack_and_send(esme, (ptr)->command_id, ptr) +static int pack_and_send(struct osmo_esme *esme, uint32_t type, void *ptr) +{ + struct msgb *msg = msgb_alloc(4096, "SMPP_Tx"); + int rc, rlen; + if (!msg) + return -ENOMEM; + + rc = smpp34_pack(type, msg->tail, msgb_tailroom(msg), &rlen, ptr); + if (rc != 0) { + LOGP(DSMPP, LOGL_ERROR, "Error during smpp34_pack(): %s\n", + smpp34_strerror); + msgb_free(msg); + return -EINVAL; + } + msgb_put(msg, rlen); + + return osmo_wqueue_enqueue(&esme->wqueue, msg); +} + +/*! \brief transmit a generic NACK to a remote ESME */ +static int smpp_tx_gen_nack(struct osmo_esme *esme, uint32_t seq, uint32_t status) +{ + struct generic_nack_t nack; + + nack.command_length = 0; + nack.command_id = GENERIC_NACK; + nack.sequence_number = seq; + nack.command_status = status; + + return PACK_AND_SEND(esme, &nack); +} + +/*! \brief retrieve SMPP command ID from a msgb */ +static inline uint32_t smpp_msgb_cmdid(struct msgb *msg) +{ + uint8_t *tmp = msgb_data(msg) + 4; + return ntohl(*(uint32_t *)tmp); +} + +/*! \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 osmo_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) + return rc; + + LOGP(DSMPP, LOGL_ERROR, "%s: GENERIC NACK: %s\n", esme->system_id, + str_command_status(nack.command_status, buf)); + + return 0; +} + +/*! \brief handle an incoming SMPP BIND RECEIVER */ +static int smpp_handle_bind_rx(struct osmo_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) + return rc; + + INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); + + LOGP(DSMPP, LOGL_INFO, "%s: BIND Rx from (Version %02x)\n", + bind.system_id, bind.interface_version); + + if (bind.interface_version != SMPP_VERSION) { + bind_r.command_status = ESME_RSYSERR; + goto err; + } + + if (esme->bind_flags) { + bind_r.command_status = ESME_RALYBND; + goto err; + } + + esme->smpp_version = bind.interface_version; + snprintf(esme->system_id, sizeof(esme->system_id), "%s", + bind.system_id); + esme->bind_flags = ESME_BIND_RX; + + /* FIXME */ +err: + return 0; +} + +/*! \brief handle an incoming SMPP BIND TRANSMITTER */ +static int smpp_handle_bind_tx(struct osmo_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) { + printf("error during unpack: %s\n", smpp34_strerror); + return rc; + } + + INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); + + LOGP(DSMPP, LOGL_INFO, "%s: BIND Tx (Version %02x)\n", + bind.system_id, bind.interface_version); + + if (bind.interface_version != SMPP_VERSION) { + bind_r.command_status = ESME_RSYSERR; + goto err; + } + + if (esme->bind_flags) { + bind_r.command_status = ESME_RALYBND; + goto err; + } + + esme->smpp_version = bind.interface_version; + snprintf(esme->system_id, sizeof(esme->system_id), "%s", bind.system_id); + esme->bind_flags = ESME_BIND_TX; + + /* build response */ + snprintf((char *)bind_r.system_id, sizeof(bind_r.system_id), "%s", + esme->smsc->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); + +err: + return PACK_AND_SEND(esme, &bind_r); +} + +/*! \brief handle an incoming SMPP BIND TRANSCEIVER */ +static int smpp_handle_bind_trx(struct osmo_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) + return rc; + + INIT_RESP(BIND_TRANSMITTER_RESP, &bind_r, &bind); + + LOGP(DSMPP, LOGL_INFO, "%s: BIND Trx (Version %02x)\n", + bind.system_id, bind.interface_version); + + if (bind.interface_version != SMPP_VERSION) { + bind_r.command_status = ESME_RSYSERR; + goto err; + } + + if (esme->bind_flags) { + bind_r.command_status = ESME_RALYBND; + goto err; + } + + esme->smpp_version = bind.interface_version; + snprintf(esme->system_id, sizeof(esme->system_id), "%s", bind.system_id); + esme->bind_flags |= ESME_BIND_TX | ESME_BIND_RX; + + /* FIXME */ +err: + return 0; +} + +/*! \brief handle an incoming SMPP UNBIND */ +static int smpp_handle_unbind(struct osmo_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) + return rc; + + INIT_RESP(UNBIND_RESP, &unbind_r, &unbind); + + LOGP(DSMPP, LOGL_INFO, "%s: UNBIND\n", esme->system_id); + + if (esme->bind_flags == 0) { + unbind_r.command_status = ESME_RINVBNDSTS; + goto err; + } + + esme->bind_flags = 0; +err: + return PACK_AND_SEND(esme, &unbind_r); +} + +/*! \brief handle an incoming SMPP ENQUIRE LINK */ +static int smpp_handle_enq_link(struct osmo_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) + return rc; + + LOGP(DSMPP, LOGL_DEBUG, "%s: Enquire Link\n", esme->system_id); + + INIT_RESP(ENQUIRE_LINK_RESP, &enq_r, &enq); + + return PACK_AND_SEND(esme, &enq_r); +} + +/*! \brief send a SUBMIT-SM RESPONSE to a remote ESME */ +int smpp_tx_submit_r(struct osmo_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(submit_r.message_id, sizeof(submit_r.message_id), "%s", msg_id); + + return PACK_AND_SEND(esme, &submit_r); +} + +/*! \brief handle an incoming SMPP SUBMIT-SM */ +static int smpp_handle_submit(struct osmo_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) + return rc; + + INIT_RESP(SUBMIT_SM_RESP, &submit_r, &submit); + + if (!(esme->bind_flags & ESME_BIND_TX)) { + submit_r.command_status = ESME_RINVBNDSTS; + return PACK_AND_SEND(esme, &submit_r); + } + + LOGP(DSMPP, LOGL_INFO, "%s: SUBMIT-SM(%s)\n", esme->system_id, + submit.service_type); + + INIT_RESP(SUBMIT_SM_RESP, &submit_r, &submit); + + rc = handle_smpp_submit(esme, &submit, &submit_r); + if (rc == 0) + return PACK_AND_SEND(esme, &submit_r); + + return rc; +} + +/*! \brief one complete SMPP PDU from the ESME has been received */ +static int smpp_pdu_rx(struct osmo_esme *esme, struct msgb *msg) +{ + uint32_t cmd_id = smpp_msgb_cmdid(msg); + int rc = 0; + + LOGP(DSMPP, LOGL_DEBUG, "%s: smpp_pdu_rx(%s)\n", esme->system_id, + osmo_hexdump(msgb_data(msg), msgb_length(msg))); + + switch (cmd_id) { + case GENERIC_NACK: + rc = smpp_handle_gen_nack(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: + break; + case DATA_SM: + break; + case CANCEL_SM: + case QUERY_SM: + case REPLACE_SM: + case SUBMIT_MULTI: + LOGP(DSMPP, LOGL_NOTICE, "%s: Unimplemented PDU Commmand " + "0x%08x\n", esme->system_id, cmd_id); + break; + default: + LOGP(DSMPP, LOGL_ERROR, "%s: Unknown PDU Command 0x%08x\n", + esme->system_id, cmd_id); + rc = smpp_tx_gen_nack(esme, smpp_msgb_seq(msg), ESME_RINVCMDID); + break; + } + + return rc; +} + +/* !\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 osmo_esme *esme = ofd->data; + uint32_t len; + uint8_t *lenptr = (uint8_t *) &len; + uint8_t *cur; + struct msgb *msg; + int rdlen; + int 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) { + LOGP(DSMPP, LOGL_ERROR, "read returned %d\n", rc); + } else if (rc == 0) { + goto dead_socket; + } else + esme->read_idx += rc; + if (esme->read_idx >= sizeof(uint32_t)) { + esme->read_len = ntohl(len); + 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) { + LOGP(DSMPP, LOGL_ERROR, "read returned %d\n", rc); + } else if (rc == 0) { + goto dead_socket; + } else { + esme->read_idx += rc; + msgb_put(msg, rc); + } + + if (esme->read_idx >= esme->read_len) { + rc = smpp_pdu_rx(esme, 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; + smpp_esme_put(esme); + + return 0; +} + +/* call-back of write queue once it wishes to write a message to the socket */ +static void esme_link_write_cb(struct osmo_fd *ofd, struct msgb *msg) +{ + struct osmo_esme *esme = ofd->data; + int rc; + + rc = write(ofd->fd, msgb_data(msg), msgb_length(msg)); + if (rc == 0) { + osmo_fd_unregister(&esme->wqueue.bfd); + close(esme->wqueue.bfd.fd); + esme->wqueue.bfd.fd = -1; + smpp_esme_put(esme); + } else if (rc < msgb_length(msg)) { + LOGP(DSMPP, LOGL_ERROR, "%s: Short write\n", esme->system_id); + return; + } +} + +/* 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 osmo_esme *esme = talloc_zero(smsc, struct osmo_esme); + if (!esme) + return -ENOMEM; + + smpp_esme_get(esme); + esme->smsc = smsc; + osmo_wqueue_init(&esme->wqueue, 10); + esme->wqueue.bfd.fd = fd; + esme->wqueue.bfd.data = esme; + esme->wqueue.bfd.when = BSC_FD_READ; + osmo_fd_register(&esme->wqueue.bfd); + + esme->wqueue.read_cb = esme_link_read_cb; + esme->wqueue.write_cb = esme_link_write_cb; + + esme->sa_len = OSMO_MIN(sizeof(esme->sa), s_len); + memcpy(&esme->sa, s, esme->sa_len); + + 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 Initialize the SMSC-side SMPP implementation */ +int smpp_smsc_init(struct smsc *smsc, uint16_t port) +{ + int rc; + + INIT_LLIST_HEAD(&smsc->esme_list); + smsc->listen_ofd.data = smsc; + smsc->listen_ofd.cb = smsc_fd_cb; + rc = osmo_sock_init_ofd(&smsc->listen_ofd, AF_UNSPEC, SOCK_STREAM, + IPPROTO_TCP, NULL, port, OSMO_SOCK_F_BIND); + + return rc; +} diff --git a/test_apps/smpp_smsc.h b/test_apps/smpp_smsc.h new file mode 100644 index 0000000..e93ae30 --- /dev/null +++ b/test_apps/smpp_smsc.h @@ -0,0 +1,60 @@ +#ifndef _SMPP_SMSC_H +#define _SMPP_SMSC_H + +#include +#include + +#include +#include +#include + +#include +#include +#include + +enum esme_read_state { + READ_ST_IN_LEN = 0, + READ_ST_IN_MSG = 1, +}; + +struct osmo_esme { + struct llist_head list; + struct smsc *smsc; + + int use; + + struct osmo_wqueue wqueue; + struct sockaddr_storage sa; + socklen_t sa_len; + + enum esme_read_state read_state; + uint32_t read_len; + uint32_t read_idx; + struct msgb *read_msg; + + uint8_t smpp_version; + char system_id[16+1]; + + uint8_t bind_flags; +}; + +struct smsc { + struct osmo_fd listen_ofd; + struct llist_head esme_list; + char system_id[16+1]; + void *priv; +}; + + +int smpp_smsc_init(struct smsc *smsc, uint16_t port); + +void smpp_esme_get(struct osmo_esme *esme); +void smpp_esme_put(struct osmo_esme *esme); + +int smpp_tx_submit_r(struct osmo_esme *esme, uint32_t sequence_nr, + uint32_t command_status, char *msg_id); + +int handle_smpp_submit(struct osmo_esme *esme, struct submit_sm_t *submit, + struct submit_sm_resp_t *submit_r); + +#endif diff --git a/test_apps/smsc_main.c b/test_apps/smsc_main.c new file mode 100644 index 0000000..e60ac23 --- /dev/null +++ b/test_apps/smsc_main.c @@ -0,0 +1,47 @@ +#include + +#include +#include +#include + +#include + +#include "smpp_smsc.h" + +#define DSMPP 1 + +int handle_smpp_submit(struct osmo_esme *esme, struct submit_sm_t *submit, + struct submit_sm_resp_t *submit_r) +{ + return 0; +} + +static const struct log_info_cat log_info_cat[] = { + [DSMPP] = { + .name = "DSMPP", + .description = "Short Message Peer-to-Peer", + .enabled = 1, .loglevel = LOGL_DEBUG, + }, +}; + +static const struct log_info log_info = { + .cat = log_info_cat, + .num_cat = ARRAY_SIZE(log_info_cat), +}; + +int main(int argc, char **argv) +{ + struct smsc *smsc = talloc_zero(NULL, struct smsc); + int rc; + + osmo_init_logging(&log_info); + + strcpy(smsc->system_id, "OpenBSC"); + rc = smpp_smsc_init(smsc, 6080); + if (rc < 0) + exit(1); + + while (1) { + osmo_select_main(0); + } +} -- cgit v1.2.3