annotate smsc-sendmt/main.c @ 15:ce6bcb84ca30

doc/Proto-SMSC-testing: document written
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 27 Aug 2023 21:47:19 -0800
parents 7543aa173634
children
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1 /*
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2 * This C module is the main for proto-smsc-sendmt, a command line utility
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3 * that constructs an MT-forwardSM.req GSUP message and shoots it over to
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4 * proto-smsc-daemon for feeding to OsmoHLR.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <sys/socket.h>
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9 #include <ctype.h>
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10 #include <string.h>
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11 #include <stdio.h>
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12 #include <stdint.h>
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13 #include <stdlib.h>
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14 #include <unistd.h>
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15 #include <errno.h>
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16
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17 #include <osmocom/core/msgb.h>
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18 #include <osmocom/core/utils.h>
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19 #include <osmocom/core/socket.h>
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20
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21 #include <osmocom/gsm/gsup.h>
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22
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23 extern void parse_smsc_addr_arg(const char *arg);
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24 extern void encode_smsc_addr(struct osmo_gsup_message *gmsg);
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25 extern int grok_imsi_user_arg(const char *arg, char *dest);
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26 extern void read_pdu_from_stdin(void);
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28 extern uint8_t tpdu_buf[];
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29 extern unsigned tpdu_len;
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30
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31 static const uint8_t sm_rp_mr = 0xFF;
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32
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33 int main(int argc, char **argv)
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34 {
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35 struct osmo_gsup_message gmsg;
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36 struct msgb *msgb;
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37 int rc, sock;
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38
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39 if (argc != 4) {
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40 fprintf(stderr, "usage: %s smsc-addr imsi socket-path\n",
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41 argv[0]);
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42 exit(1);
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43 }
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44 parse_smsc_addr_arg(argv[1]);
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45 memset(&gmsg, 0, sizeof(gmsg));
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46 rc = grok_imsi_user_arg(argv[2], gmsg.imsi);
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47 if (rc < 0) {
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48 fprintf(stderr, "error: invalid IMSI argument\n");
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49 exit(1);
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50 }
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51 read_pdu_from_stdin();
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52
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53 /* fill out the rest of GSUP msg */
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54 gmsg.message_type = OSMO_GSUP_MSGT_MT_FORWARD_SM_REQUEST;
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55 gmsg.message_class = OSMO_GSUP_MESSAGE_CLASS_SMS;
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56 gmsg.sm_rp_mr = &sm_rp_mr;
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57 gmsg.sm_rp_da_type = OSMO_GSUP_SMS_SM_RP_ODA_NULL;
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58 gmsg.sm_rp_oa_type = OSMO_GSUP_SMS_SM_RP_ODA_SMSC_ADDR;
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59 encode_smsc_addr(&gmsg);
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60 gmsg.sm_rp_ui = tpdu_buf;
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61 gmsg.sm_rp_ui_len = tpdu_len;
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62
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63 /* pack it into an msgb */
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64 msgb = msgb_alloc_headroom(4000, 64, "sendmt");
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65 if (!msgb) {
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66 fprintf(stderr, "error: unable to allocate msgb\n");
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67 exit(1);
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68 }
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69 rc = osmo_gsup_encode(msgb, &gmsg);
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70 if (rc < 0) {
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71 fprintf(stderr, "error: osmo_gsup_encode() failed\n");
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72 exit(1);
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73 }
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74
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75 /* send it off via UNIX socket */
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76 sock = osmo_sock_unix_init(SOCK_DGRAM, 0, argv[3], OSMO_SOCK_F_CONNECT);
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77 if (sock < 0) {
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78 fprintf(stderr, "error connecting to %s\n", argv[3]);
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79 exit(1);
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80 }
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81 rc = send(sock, msgb->data, msgb->len, 0);
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82 if (rc < 0) {
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83 perror("sending dgram on socket");
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84 exit(1);
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85 }
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86 exit(0);
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87 }