330 lines
8.1 KiB
C
330 lines
8.1 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <errno.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <smpp34.h>
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#include <smpp34_structs.h>
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#include <smpp34_params.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/write_queue.h>
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#include <openbsc/debug.h>
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/* FIXME: merge with smpp_smsc.c */
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#define SMPP_SYS_ID_LEN 16
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enum esme_read_state {
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READ_ST_IN_LEN = 0,
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READ_ST_IN_MSG = 1,
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};
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/* FIXME: merge with smpp_smsc.c */
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struct esme {
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struct osmo_fd ofd;
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uint32_t own_seq_nr;
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struct osmo_wqueue wqueue;
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enum esme_read_state read_state;
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uint32_t read_len;
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uint32_t read_idx;
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struct msgb *read_msg;
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uint8_t smpp_version;
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char system_id[SMPP_SYS_ID_LEN+1];
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char password[SMPP_SYS_ID_LEN+1];
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};
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/* FIXME: merge with smpp_smsc.c */
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#define SMPP34_UNPACK(rc, type, str, data, len) \
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memset(str, 0, sizeof(*str)); \
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rc = smpp34_unpack(type, str, data, len)
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#define INIT_RESP(type, resp, req) { \
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memset((resp), 0, sizeof(*(resp))); \
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(resp)->command_length = 0; \
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(resp)->command_id = type; \
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(resp)->command_status = ESME_ROK; \
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(resp)->sequence_number = (req)->sequence_number; \
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}
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#define PACK_AND_SEND(esme, ptr) pack_and_send(esme, (ptr)->command_id, ptr)
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static inline uint32_t smpp_msgb_cmdid(struct msgb *msg)
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{
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uint8_t *tmp = msgb_data(msg) + 4;
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return ntohl(*(uint32_t *)tmp);
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}
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static uint32_t esme_inc_seq_nr(struct esme *esme)
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{
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esme->own_seq_nr++;
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if (esme->own_seq_nr > 0x7fffffff)
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esme->own_seq_nr = 1;
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return esme->own_seq_nr;
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}
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static int pack_and_send(struct esme *esme, uint32_t type, void *ptr)
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{
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struct msgb *msg = msgb_alloc(4096, "SMPP_Tx");
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int rc, rlen;
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if (!msg)
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return -ENOMEM;
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rc = smpp34_pack(type, msg->tail, msgb_tailroom(msg), &rlen, ptr);
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if (rc != 0) {
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LOGP(DSMPP, LOGL_ERROR, "[%s] Error during smpp34_pack(): %s\n",
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esme->system_id, smpp34_strerror);
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msgb_free(msg);
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return -EINVAL;
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}
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msgb_put(msg, rlen);
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if (osmo_wqueue_enqueue(&esme->wqueue, msg) != 0) {
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LOGP(DSMPP, LOGL_ERROR, "[%s] Write queue full. Dropping message\n",
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esme->system_id);
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msgb_free(msg);
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return -EAGAIN;
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}
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return 0;
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}
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/* FIXME: merge with smpp_smsc.c */
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static int smpp_handle_deliver(struct esme *esme, struct msgb *msg)
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{
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struct deliver_sm_t deliver;
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struct deliver_sm_resp_t deliver_r;
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struct submit_sm_t submit;
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int rc;
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memset(&deliver, 0, sizeof(deliver));
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SMPP34_UNPACK(rc, DELIVER_SM, &deliver, msgb_data(msg), msgb_length(msg));
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if (rc < 0)
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return rc;
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INIT_RESP(DELIVER_SM_RESP, &deliver_r, &deliver);
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PACK_AND_SEND(esme, &deliver_r);
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memset(&submit, 0, sizeof(submit));
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submit.command_id = SUBMIT_SM;
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submit.command_status = ESME_ROK;
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submit.sequence_number = esme_inc_seq_nr(esme);
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submit.dest_addr_ton = deliver.source_addr_ton;
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submit.dest_addr_npi = deliver.source_addr_npi;
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memcpy(submit.destination_addr, deliver.source_addr,
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OSMO_MIN(sizeof(submit.destination_addr),
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sizeof(deliver.source_addr)));
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submit.source_addr_ton = deliver.dest_addr_ton;
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submit.source_addr_npi = deliver.dest_addr_npi;
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memcpy(submit.source_addr, deliver.destination_addr,
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OSMO_MIN(sizeof(submit.source_addr),
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sizeof(deliver.destination_addr)));
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submit.esm_class = deliver.esm_class;
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submit.protocol_id = deliver.protocol_id;
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submit.priority_flag = deliver.priority_flag;
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memcpy(submit.schedule_delivery_time, deliver.schedule_delivery_time,
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OSMO_MIN(sizeof(submit.schedule_delivery_time),
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sizeof(deliver.schedule_delivery_time)));
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memcpy(submit.validity_period, deliver.validity_period,
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OSMO_MIN(sizeof(submit.validity_period),
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sizeof(deliver.validity_period)));
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submit.registered_delivery = deliver.registered_delivery;
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submit.replace_if_present_flag = deliver.replace_if_present_flag;
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submit.data_coding = deliver.data_coding;
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submit.sm_default_msg_id = deliver.sm_default_msg_id;
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submit.sm_length = deliver.sm_length;
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memcpy(submit.short_message, deliver.short_message,
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OSMO_MIN(sizeof(submit.short_message),
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sizeof(deliver.short_message)));
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/* FIXME: TLV? */
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return PACK_AND_SEND(esme, &submit);
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}
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static int bind_transceiver(struct esme *esme)
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{
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struct bind_transceiver_t bind;
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memset(&bind, 0, sizeof(bind));
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bind.command_id = BIND_TRANSCEIVER;
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bind.sequence_number = esme_inc_seq_nr(esme);
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snprintf((char *)bind.system_id, sizeof(bind.system_id), "%s", esme->system_id);
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snprintf((char *)bind.password, sizeof(bind.password), "%s", esme->password);
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snprintf((char *)bind.system_type, sizeof(bind.system_type), "mirror");
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bind.interface_version = esme->smpp_version;
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return PACK_AND_SEND(esme, &bind);
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}
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static int smpp_pdu_rx(struct esme *esme, struct msgb *msg)
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{
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uint32_t cmd_id = smpp_msgb_cmdid(msg);
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int rc;
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switch (cmd_id) {
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case DELIVER_SM:
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rc = smpp_handle_deliver(esme, msg);
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break;
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default:
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LOGP(DSMPP, LOGL_NOTICE, "unhandled case %d\n", cmd_id);
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rc = 0;
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break;
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}
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return rc;
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}
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/* FIXME: merge with smpp_smsc.c */
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static int esme_read_cb(struct osmo_fd *ofd)
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{
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struct esme *esme = ofd->data;
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uint32_t len;
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uint8_t *lenptr = (uint8_t *) &len;
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uint8_t *cur;
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struct msgb *msg;
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int rdlen;
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int rc;
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switch (esme->read_state) {
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case READ_ST_IN_LEN:
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rdlen = sizeof(uint32_t) - esme->read_idx;
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rc = read(ofd->fd, lenptr + esme->read_idx, rdlen);
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if (rc < 0) {
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LOGP(DSMPP, LOGL_ERROR, "[%s] read returned %d\n",
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esme->system_id, rc);
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} else if (rc == 0) {
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goto dead_socket;
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} else
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esme->read_idx += rc;
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if (esme->read_idx >= sizeof(uint32_t)) {
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esme->read_len = ntohl(len);
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msg = msgb_alloc(esme->read_len, "SMPP Rx");
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if (!msg)
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return -ENOMEM;
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esme->read_msg = msg;
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cur = msgb_put(msg, sizeof(uint32_t));
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memcpy(cur, lenptr, sizeof(uint32_t));
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esme->read_state = READ_ST_IN_MSG;
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esme->read_idx = sizeof(uint32_t);
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}
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break;
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case READ_ST_IN_MSG:
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msg = esme->read_msg;
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rdlen = esme->read_len - esme->read_idx;
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rc = read(ofd->fd, msg->tail, OSMO_MIN(rdlen, msgb_tailroom(msg)));
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if (rc < 0) {
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LOGP(DSMPP, LOGL_ERROR, "[%s] read returned %d\n",
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esme->system_id, rc);
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} else if (rc == 0) {
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goto dead_socket;
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} else {
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esme->read_idx += rc;
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msgb_put(msg, rc);
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}
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if (esme->read_idx >= esme->read_len) {
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rc = smpp_pdu_rx(esme, esme->read_msg);
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esme->read_msg = NULL;
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esme->read_idx = 0;
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esme->read_len = 0;
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esme->read_state = READ_ST_IN_LEN;
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}
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break;
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}
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return 0;
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dead_socket:
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msgb_free(esme->read_msg);
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osmo_fd_unregister(&esme->wqueue.bfd);
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close(esme->wqueue.bfd.fd);
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esme->wqueue.bfd.fd = -1;
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exit(2342);
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return 0;
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}
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static int esme_write_cb(struct osmo_fd *ofd, struct msgb *msg)
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{
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struct esme *esme = ofd->data;
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int rc;
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rc = write(ofd->fd, msgb_data(msg), msgb_length(msg));
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if (rc == 0) {
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osmo_fd_unregister(&esme->wqueue.bfd);
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close(esme->wqueue.bfd.fd);
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esme->wqueue.bfd.fd = -1;
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exit(99);
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} else if (rc < msgb_length(msg)) {
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LOGP(DSMPP, LOGL_ERROR, "[%s] Short write\n", esme->system_id);
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return 0;
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}
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return 0;
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}
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static int smpp_esme_init(struct esme *esme, const char *host, uint16_t port)
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{
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int rc;
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if (port == 0)
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port = 2775;
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esme->own_seq_nr = rand();
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esme_inc_seq_nr(esme);
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osmo_wqueue_init(&esme->wqueue, 10);
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esme->wqueue.bfd.data = esme;
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esme->wqueue.read_cb = esme_read_cb;
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esme->wqueue.write_cb = esme_write_cb;
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rc = osmo_sock_init_ofd(&esme->wqueue.bfd, AF_UNSPEC, SOCK_STREAM,
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IPPROTO_TCP, host, port, OSMO_SOCK_F_CONNECT);
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if (rc < 0)
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return rc;
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return bind_transceiver(esme);
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}
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int main(int argc, char **argv)
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{
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struct esme esme;
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char *host = "localhost";
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int port = 0;
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int rc;
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msgb_talloc_ctx_init(NULL, 0);
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memset(&esme, 0, sizeof(esme));
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osmo_init_logging(&log_info);
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snprintf((char *) esme.system_id, sizeof(esme.system_id), "mirror");
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snprintf((char *) esme.password, sizeof(esme.password), "mirror");
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esme.smpp_version = 0x34;
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if (argc >= 2)
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host = argv[1];
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if (argc >= 3)
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port = atoi(argv[2]);
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rc = smpp_esme_init(&esme, host, port);
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if (rc < 0)
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exit(1);
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while (1) {
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osmo_select_main(0);
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}
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exit(0);
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}
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