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annotate mgw/crcx.c @ 99:738be11ac432

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mgw internal code: simplify MDCX error handling
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Sep 2022 13:42:46 -0800
parents 020ba624bdd8
children f062c32a5116
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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32
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 /*
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
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2 * In this module we implement our CRCX operation.
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Mychaela Falconia <falcon@freecalypso.org>
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3 */
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Mychaela Falconia <falcon@freecalypso.org>
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4
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Mychaela Falconia <falcon@freecalypso.org>
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5 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 #include <sys/socket.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 #include <netinet/in.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 #include <arpa/inet.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 #include <stdio.h>
38
020ba624bdd8 mgw source: #include <stdlib.h> in files using tmgw_ctrl.h
Mychaela Falconia <falcon@freecalypso.org>
parents: 34
diff changeset
10 #include <stdint.h>
32
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 #include <stdlib.h>
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Mychaela Falconia <falcon@freecalypso.org>
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12 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 #include <syslog.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 #include <unistd.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 #include "../include/tmgw_ctrl.h"
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 #include "../include/tmgw_const.h"
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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18 #include "struct.h"
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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19 #include "select.h"
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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20
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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21 extern struct endpoint *find_ep_by_id();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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22 extern void udp_sink_rcvr();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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23
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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24 extern struct bind_range_cfg bind_range_gsm, bind_range_pstn;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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25
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Mychaela Falconia <falcon@freecalypso.org>
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26 static unsigned
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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27 get_new_ep_id(conn)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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28 struct ctrl_conn *conn;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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30 unsigned id;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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31
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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32 for (;;) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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33 id = conn->next_ep_id++;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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34 if (!find_ep_by_id(conn, id))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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35 return id;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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36 }
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Mychaela Falconia <falcon@freecalypso.org>
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37 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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38
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Mychaela Falconia <falcon@freecalypso.org>
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39 static int
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 get_local_port_pair(ep, roe, brc)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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41 struct endpoint *ep;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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42 struct rtp_one_end *roe;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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43 struct bind_range_cfg *brc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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44 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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45 struct sockaddr_in sin;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 unsigned tries, rtp_port;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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47 int rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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48
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 sin.sin_family = AF_INET;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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50 sin.sin_addr = brc->bind_ip;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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51 for (tries = brc->port_tries; tries; tries--) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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52 rtp_port = brc->port_next;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 brc->port_next += 2;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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54 if (brc->port_next >= brc->port_range_end)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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55 brc->port_next = brc->port_range_start;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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56 sin.sin_port = htons(rtp_port);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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57 roe->rtp_fd = socket(AF_INET, SOCK_DGRAM, 0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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58 if (roe->rtp_fd < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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59 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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60 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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61 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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62 rc = bind(roe->rtp_fd, (struct sockaddr *) &sin, sizeof sin);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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63 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 close(roe->rtp_fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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65 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 bcopy(&sin, &roe->bound_addr, sizeof(struct sockaddr_in));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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68 sin.sin_port = htons(rtp_port+1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 roe->rtcp_fd = socket(AF_INET, SOCK_DGRAM, 0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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70 if (roe->rtcp_fd < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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71 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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72 close(roe->rtp_fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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73 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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75 rc = bind(roe->rtcp_fd, (struct sockaddr *) &sin, sizeof sin);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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76 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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77 close(roe->rtp_fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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78 close(roe->rtcp_fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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81 /* all good - make the file descriptors live for select */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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82 update_max_fd(roe->rtp_fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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83 FD_SET(roe->rtp_fd, &select_for_read);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 select_handlers[roe->rtp_fd] = udp_sink_rcvr;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 select_data[roe->rtp_fd] = (void *) ep;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 update_max_fd(roe->rtcp_fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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87 FD_SET(roe->rtcp_fd, &select_for_read);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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88 select_handlers[roe->rtcp_fd] = udp_sink_rcvr;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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89 select_data[roe->rtcp_fd] = (void *) ep;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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90 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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91 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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92 /* couldn't find a free port pair */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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93 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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94 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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95
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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96 void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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97 process_crcx(conn, req, resp)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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98 struct ctrl_conn *conn;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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99 struct tmgw_ctrl_req *req;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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100 struct tmgw_ctrl_resp *resp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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101 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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102 struct endpoint *ep;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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103 int rc;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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104
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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105 /* ep_id in request encodes ep_type */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 switch (req->ep_id) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 case TMGW_EP_TYPE_DUMMY_GSM:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 case TMGW_EP_TYPE_DUMMY_PSTN:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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109 case TMGW_EP_TYPE_GATEWAY:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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110 break;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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111 default:
34
7dae2bae56a1 themwi-mgw: implement MDCX parameter validation
Mychaela Falconia <falcon@freecalypso.org>
parents: 32
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112 resp->res = TMGW_RESP_ERR_PARAM;
32
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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113 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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114 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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115 ep = malloc(sizeof(struct endpoint));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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116 if (!ep) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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117 syslog(LOG_CRIT, "malloc for endpoint: %m");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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118 resp->res = TMGW_RESP_ERR_RSRC;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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119 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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121 bzero(ep, sizeof(struct endpoint));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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122 ep->ep_type = req->ep_id;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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123 ep->ep_id = get_new_ep_id(conn);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 if (ep->ep_type & TMGW_EP_HAS_GSM_SOCK) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 rc = get_local_port_pair(ep, &ep->rtp_gsm, &bind_range_gsm);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 syslog(LOG_ERR,
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
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128 "unable to get local port pair on GSM side");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 free(ep);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 resp->res = TMGW_RESP_ERR_RSRC;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 if (ep->ep_type & TMGW_EP_HAS_PSTN_SOCK) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 rc = get_local_port_pair(ep, &ep->rtp_pstn, &bind_range_pstn);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (rc < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 syslog(LOG_ERR,
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 "unable to get local port pair on PSTN side");
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 if (ep->ep_type & TMGW_EP_HAS_GSM_SOCK)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 free_rtp_end(&ep->rtp_gsm);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 free(ep);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 resp->res = TMGW_RESP_ERR_RSRC;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 return;
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 }
99
738be11ac432 mgw internal code: simplify MDCX error handling
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
146 rc = mdcx_operation(ep, req);
738be11ac432 mgw internal code: simplify MDCX error handling
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
147 if (rc != TMGW_RESP_OK) {
32
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 if (ep->ep_type & TMGW_EP_HAS_GSM_SOCK)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 free_rtp_end(&ep->rtp_gsm);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 if (ep->ep_type & TMGW_EP_HAS_PSTN_SOCK)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 free_rtp_end(&ep->rtp_pstn);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 free(ep);
99
738be11ac432 mgw internal code: simplify MDCX error handling
Mychaela Falconia <falcon@freecalypso.org>
parents: 38
diff changeset
153 resp->res = rc;
32
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 return;
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 /* all good - accept the new endpoint and return OK */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 ep->next = conn->endp_list;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 conn->endp_list = ep;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 resp->res = TMGW_RESP_OK;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 resp->ep_id = ep->ep_id;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 bcopy(&ep->rtp_gsm.bound_addr, &resp->gsm_addr,
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 sizeof(struct sockaddr_in));
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 bcopy(&ep->rtp_pstn.bound_addr, &resp->pstn_addr,
b3f74df7b808 beginning of themwi-mgw
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 sizeof(struct sockaddr_in));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 syslog(LOG_INFO, "CRCX endpoint type %u id %u", ep->ep_type, ep->ep_id);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 }